| Message ID | 20191106193609.19645-2-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for PCIe controller to work in endpoint mode on R-Car SoCs. | expand |
Hi Prabhakar, On 07/11/19 1:06 AM, Lad Prabhakar wrote: > From: "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com> > > this patch prepares for adding endpoint support to rcar controller, > there are no functional changes with this patch, a common file is > created so that it can be shared with endpoint driver. > > Signed-off-by: Lad, Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > --- > arch/arm64/configs/defconfig | 2 +- > arch/arm64/configs/renesas_defconfig | 2 +- > drivers/pci/controller/Kconfig | 4 +- > drivers/pci/controller/Makefile | 2 +- > drivers/pci/controller/pcie-rcar-host.c | 1058 +++++++++++++++++++ > drivers/pci/controller/pcie-rcar.c | 1231 +---------------------- Can you create this patch using "git format-patch -M", so that only whatever changed appears here. Thanks Kishon > drivers/pci/controller/pcie-rcar.h | 129 +++ > 7 files changed, 1245 insertions(+), 1183 deletions(-) > create mode 100644 drivers/pci/controller/pcie-rcar-host.c > create mode 100644 drivers/pci/controller/pcie-rcar.h > > diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig > index 7d16f10a9251..f67ce0ccea1d 100644 > --- a/arch/arm64/configs/defconfig > +++ b/arch/arm64/configs/defconfig > @@ -186,7 +186,7 @@ CONFIG_HOTPLUG_PCI=y > CONFIG_HOTPLUG_PCI_ACPI=y > CONFIG_PCI_AARDVARK=y > CONFIG_PCI_TEGRA=y > -CONFIG_PCIE_RCAR=y > +CONFIG_PCIE_RCAR_HOST=y > CONFIG_PCI_HOST_GENERIC=y > CONFIG_PCI_XGENE=y > CONFIG_PCIE_ALTERA=y > diff --git a/arch/arm64/configs/renesas_defconfig b/arch/arm64/configs/renesas_defconfig > index f7411e8807d6..75fc418377c5 100644 > --- a/arch/arm64/configs/renesas_defconfig > +++ b/arch/arm64/configs/renesas_defconfig > @@ -91,7 +91,7 @@ CONFIG_PCIEPORTBUS=y > CONFIG_HOTPLUG_PCI_PCIE=y > CONFIG_PCI_IOV=y > CONFIG_HOTPLUG_PCI=y > -CONFIG_PCIE_RCAR=y > +CONFIG_PCIE_RCAR_HOST=y > CONFIG_PCI_HOST_GENERIC=y > CONFIG_DEVTMPFS=y > CONFIG_DEVTMPFS_MOUNT=y > diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig > index 70e078238899..01c238e5ea1e 100644 > --- a/drivers/pci/controller/Kconfig > +++ b/drivers/pci/controller/Kconfig > @@ -82,12 +82,12 @@ config PCI_RCAR_GEN2 > There are 3 internal PCI controllers available with a single > built-in EHCI/OHCI host controller present on each one. > > -config PCIE_RCAR > +config PCIE_RCAR_HOST > bool "Renesas R-Car PCIe controller" > depends on ARCH_RENESAS || COMPILE_TEST > depends on PCI_MSI_IRQ_DOMAIN > help > - Say Y here if you want PCIe controller support on R-Car SoCs. > + Say Y here if you want PCIe controller support on R-Car SoCs in host mode. > > config PCI_HOST_COMMON > bool > diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile > index a2a22c9d91af..3577902a0d40 100644 > --- a/drivers/pci/controller/Makefile > +++ b/drivers/pci/controller/Makefile > @@ -9,7 +9,7 @@ obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o > obj-$(CONFIG_PCI_AARDVARK) += pci-aardvark.o > obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o > obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o > -obj-$(CONFIG_PCIE_RCAR) += pcie-rcar.o > +obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar.o pcie-rcar-host.o > obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o > obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o > obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o > diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c > new file mode 100644 > index 000000000000..645ef3e41e27 > --- /dev/null > +++ b/drivers/pci/controller/pcie-rcar-host.c > @@ -0,0 +1,1058 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * PCIe driver for Renesas R-Car SoCs > + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd > + * > + * Based on: > + * arch/sh/drivers/pci/pcie-sh7786.c > + * arch/sh/drivers/pci/ops-sh7786.c > + * Copyright (C) 2009 - 2011 Paul Mundt > + * > + * Author: Phil Edworthy <phil.edworthy@renesas.com> > + */ > + > +#include <linux/clk.h> > +#include <linux/delay.h> > +#include <linux/msi.h> > +#include <linux/of_address.h> > +#include <linux/of_irq.h> > +#include <linux/of_pci.h> > +#include <linux/of_platform.h> > +#include <linux/pci.h> > +#include <linux/phy/phy.h> > + > +#include "pcie-rcar.h" > + > +struct rcar_msi { > + DECLARE_BITMAP(used, INT_PCI_MSI_NR); > + struct irq_domain *domain; > + struct msi_controller chip; > + unsigned long pages; > + struct mutex lock; /* serializes msi */ > + int irq1; > + int irq2; > +}; > + > +static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip) > +{ > + return container_of(chip, struct rcar_msi, chip); > +} > + > +/* Structure representing the PCIe interface */ > +struct rcar_pcie { > + struct device *dev; > + struct phy *phy; > + void __iomem *base; > + struct list_head resources; > + int root_bus_nr; > + struct clk *bus_clk; > + struct rcar_msi msi; > +}; > + > +static u32 rcar_read_conf(struct rcar_pcie *pcie, int where) > +{ > + unsigned int shift = BITS_PER_BYTE * (where & 3); > + u32 val = rcar_pci_read_reg(pcie->base, where & ~3); > + > + return val >> shift; > +} > + > +/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ > +static int > +rcar_pcie_config_access(struct rcar_pcie *pcie, > + unsigned char access_type, struct pci_bus *bus, > + unsigned int devfn, int where, u32 *data) > +{ > + unsigned int dev, func, reg, index; > + > + dev = PCI_SLOT(devfn); > + func = PCI_FUNC(devfn); > + reg = where & ~3; > + index = reg / 4; > + > + /* > + * While each channel has its own memory-mapped extended config > + * space, it's generally only accessible when in endpoint mode. > + * When in root complex mode, the controller is unable to target > + * itself with either type 0 or type 1 accesses, and indeed, any > + * controller initiated target transfer to its own config space > + * result in a completer abort. > + * > + * Each channel effectively only supports a single device, but as > + * the same channel <-> device access works for any PCI_SLOT() > + * value, we cheat a bit here and bind the controller's config > + * space to devfn 0 in order to enable self-enumeration. In this > + * case the regular ECAR/ECDR path is sidelined and the mangled > + * config access itself is initiated as an internal bus transaction. > + */ > + if (pci_is_root_bus(bus)) { > + if (dev != 0) > + return PCIBIOS_DEVICE_NOT_FOUND; > + > + if (access_type == RCAR_PCI_ACCESS_READ) { > + *data = rcar_pci_read_reg(pcie->base, PCICONF(index)); > + } else { > + /* Keep an eye out for changes to the root bus number */ > + if (pci_is_root_bus(bus) && reg == PCI_PRIMARY_BUS) > + pcie->root_bus_nr = *data & 0xff; > + > + rcar_pci_write_reg(pcie->base, *data, PCICONF(index)); > + } > + > + return PCIBIOS_SUCCESSFUL; > + } > + > + if (pcie->root_bus_nr < 0) > + return PCIBIOS_DEVICE_NOT_FOUND; > + > + /* Clear errors */ > + rcar_pci_write_reg(pcie->base, rcar_pci_read_reg(pcie->base, PCIEERRFR), > + PCIEERRFR); > + > + /* Set the PIO address */ > + rcar_pci_write_reg(pcie->base, PCIE_CONF_BUS(bus->number) | > + PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR); > + > + /* Enable the configuration access */ > + if (bus->parent->number == pcie->root_bus_nr) > + rcar_pci_write_reg(pcie->base, > + CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR); > + else > + rcar_pci_write_reg(pcie->base, > + CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR); > + > + /* Check for errors */ > + if (rcar_pci_read_reg(pcie->base, PCIEERRFR) & UNSUPPORTED_REQUEST) > + return PCIBIOS_DEVICE_NOT_FOUND; > + > + /* Check for master and target aborts */ > + if (rcar_read_conf(pcie, RCONF(PCI_STATUS)) & > + (PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT)) > + return PCIBIOS_DEVICE_NOT_FOUND; > + > + if (access_type == RCAR_PCI_ACCESS_READ) > + *data = rcar_pci_read_reg(pcie->base, PCIECDR); > + else > + rcar_pci_write_reg(pcie->base, *data, PCIECDR); > + > + /* Disable the configuration access */ > + rcar_pci_write_reg(pcie->base, 0, PCIECCTLR); > + > + return PCIBIOS_SUCCESSFUL; > +} > + > +static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn, > + int where, int size, u32 *val) > +{ > + struct rcar_pcie *pcie = bus->sysdata; > + int ret; > + > + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, > + bus, devfn, where, val); > + if (ret != PCIBIOS_SUCCESSFUL) { > + *val = 0xffffffff; > + return ret; > + } > + > + if (size == 1) > + *val = (*val >> (BITS_PER_BYTE * (where & 3))) & 0xff; > + else if (size == 2) > + *val = (*val >> (BITS_PER_BYTE * (where & 2))) & 0xffff; > + > + dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", > + bus->number, devfn, where, size, *val); > + > + return ret; > +} > + > +/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ > +static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn, > + int where, int size, u32 val) > +{ > + struct rcar_pcie *pcie = bus->sysdata; > + unsigned int shift; > + u32 data; > + int ret; > + > + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, > + bus, devfn, where, &data); > + if (ret != PCIBIOS_SUCCESSFUL) > + return ret; > + > + dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", > + bus->number, devfn, where, size, val); > + > + if (size == 1) { > + shift = BITS_PER_BYTE * (where & 3); > + data &= ~(0xff << shift); > + data |= ((val & 0xff) << shift); > + } else if (size == 2) { > + shift = BITS_PER_BYTE * (where & 2); > + data &= ~(0xffff << shift); > + data |= ((val & 0xffff) << shift); > + } else { > + data = val; > + } > + > + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_WRITE, > + bus, devfn, where, &data); > + > + return ret; > +} > + > +static struct pci_ops rcar_pcie_ops = { > + .read = rcar_pcie_read_conf, > + .write = rcar_pcie_write_conf, > +}; > + > +static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) > +{ > + struct resource_entry *win; > + int i = 0; > + > + /* Setup PCI resources */ > + resource_list_for_each_entry(win, &pci->resources) { > + struct resource *res = win->res; > + > + if (!res->flags) > + continue; > + > + switch (resource_type(res)) { > + case IORESOURCE_IO: > + case IORESOURCE_MEM: > + rcar_pcie_set_outbound(i, pci->base, res, true); > + i++; > + break; > + case IORESOURCE_BUS: > + pci->root_bus_nr = res->start; > + break; > + default: > + continue; > + } > + > + pci_add_resource(resource, res); > + } > + > + return 1; > +} > + > +static void rcar_pcie_force_speedup(struct rcar_pcie *pcie) > +{ > + struct device *dev = pcie->dev; > + unsigned int timeout = 1000; > + u32 macsr; > + > + if ((rcar_pci_read_reg(pcie->base, MACS2R) & LINK_SPEED) != > + LINK_SPEED_5_0GTS) > + return; > + > + if (rcar_pci_read_reg(pcie->base, MACCTLR) & SPEED_CHANGE) { > + dev_err(dev, "Speed change already in progress\n"); > + return; > + } > + > + macsr = rcar_pci_read_reg(pcie->base, MACSR); > + if ((macsr & LINK_SPEED) == LINK_SPEED_5_0GTS) > + goto done; > + > + /* Set target link speed to 5.0 GT/s */ > + rcar_rmw32(pcie->base, EXPCAP(12), PCI_EXP_LNKSTA_CLS, > + PCI_EXP_LNKSTA_CLS_5_0GB); > + > + /* Set speed change reason as intentional factor */ > + rcar_rmw32(pcie->base, MACCGSPSETR, SPCNGRSN, 0); > + > + /* Clear SPCHGFIN, SPCHGSUC, and SPCHGFAIL */ > + if (macsr & (SPCHGFIN | SPCHGSUC | SPCHGFAIL)) > + rcar_pci_write_reg(pcie->base, macsr, MACSR); > + > + /* Start link speed change */ > + rcar_rmw32(pcie->base, MACCTLR, SPEED_CHANGE, SPEED_CHANGE); > + > + while (timeout--) { > + macsr = rcar_pci_read_reg(pcie->base, MACSR); > + if (macsr & SPCHGFIN) { > + /* Clear the interrupt bits */ > + rcar_pci_write_reg(pcie->base, macsr, MACSR); > + > + if (macsr & SPCHGFAIL) > + dev_err(dev, "Speed change failed\n"); > + > + goto done; > + } > + > + usleep_range(1000, 2000); > + } > + > + dev_err(dev, "Speed change timed out\n"); > + > +done: > + dev_info(dev, "Current link speed is %s GT/s\n", > + (macsr & LINK_SPEED) == LINK_SPEED_5_0GTS ? "5" : "2.5"); > +} > + > +static int rcar_pcie_enable(struct rcar_pcie *pcie) > +{ > + struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); > + struct device *dev = pcie->dev; > + struct pci_bus *bus, *child; > + int ret; > + > + /* Try setting 5 GT/s link speed */ > + rcar_pcie_force_speedup(pcie); > + > + rcar_pcie_setup(&bridge->windows, pcie); > + > + pci_add_flags(PCI_REASSIGN_ALL_BUS); > + > + bridge->dev.parent = dev; > + bridge->sysdata = pcie; > + bridge->busnr = pcie->root_bus_nr; > + bridge->ops = &rcar_pcie_ops; > + bridge->map_irq = of_irq_parse_and_map_pci; > + bridge->swizzle_irq = pci_common_swizzle; > + if (IS_ENABLED(CONFIG_PCI_MSI)) > + bridge->msi = &pcie->msi.chip; > + > + ret = pci_scan_root_bus_bridge(bridge); > + if (ret < 0) > + return ret; > + > + bus = bridge->bus; > + > + pci_bus_size_bridges(bus); > + pci_bus_assign_resources(bus); > + > + list_for_each_entry(child, &bus->children, node) > + pcie_bus_configure_settings(child); > + > + pci_bus_add_devices(bus); > + > + return 0; > +} > + > +static int phy_wait_for_ack(struct rcar_pcie *pcie) > +{ > + struct device *dev = pcie->dev; > + unsigned int timeout = 100; > + > + while (timeout--) { > + if (rcar_pci_read_reg(pcie->base, H1_PCIEPHYADRR) & PHY_ACK) > + return 0; > + > + usleep_range(90, 110); > + } > + > + dev_err(dev, "Access to PCIe phy timed out\n"); > + > + return -ETIMEDOUT; > +} > + > +static void phy_write_reg(struct rcar_pcie *pcie, > + unsigned int rate, u32 addr, > + unsigned int lane, u32 data) > +{ > + u32 phyaddr; > + > + phyaddr = WRITE_CMD | > + ((rate & 1) << RATE_POS) | > + ((lane & 0xf) << LANE_POS) | > + ((addr & 0xff) << ADR_POS); > + > + /* Set write data */ > + rcar_pci_write_reg(pcie->base, data, H1_PCIEPHYDOUTR); > + rcar_pci_write_reg(pcie->base, phyaddr, H1_PCIEPHYADRR); > + > + /* Ignore errors as they will be dealt with if the data link is down */ > + phy_wait_for_ack(pcie); > + > + /* Clear command */ > + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYDOUTR); > + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYADRR); > + > + /* Ignore errors as they will be dealt with if the data link is down */ > + phy_wait_for_ack(pcie); > +} > + > +static int rcar_pcie_hw_init(struct rcar_pcie *pcie) > +{ > + int err; > + > + /* Begin initialization */ > + rcar_pci_write_reg(pcie->base, 0, PCIETCTLR); > + > + /* Set mode */ > + rcar_pci_write_reg(pcie->base, 1, PCIEMSR); > + > + err = rcar_pcie_wait_for_phyrdy(pcie->base); > + if (err) > + return err; > + > + /* > + * Initial header for port config space is type 1, set the device > + * class to match. Hardware takes care of propagating the IDSETR > + * settings, so there is no need to bother with a quirk. > + */ > + rcar_pci_write_reg(pcie->base, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1); > + > + /* > + * Setup Secondary Bus Number & Subordinate Bus Number, even though > + * they aren't used, to avoid bridge being detected as broken. > + */ > + rcar_rmw32(pcie->base, RCONF(PCI_SECONDARY_BUS), 0xff, 1); > + rcar_rmw32(pcie->base, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1); > + > + /* Initialize default capabilities. */ > + rcar_rmw32(pcie->base, REXPCAP(0), 0xff, PCI_CAP_ID_EXP); > + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_FLAGS), > + PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4); > + rcar_rmw32(pcie->base, RCONF(PCI_HEADER_TYPE), 0x7f, > + PCI_HEADER_TYPE_BRIDGE); > + > + /* Enable data link layer active state reporting */ > + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC, > + PCI_EXP_LNKCAP_DLLLARC); > + > + /* Write out the physical slot number = 0 */ > + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0); > + > + /* Set the completion timer timeout to the maximum 50ms. */ > + rcar_rmw32(pcie->base, TLCTLR + 1, 0x3f, 50); > + > + /* Terminate list of capabilities (Next Capability Offset=0) */ > + rcar_rmw32(pcie->base, RVCCAP(0), 0xfff00000, 0); > + > + /* Enable MSI */ > + if (IS_ENABLED(CONFIG_PCI_MSI)) > + rcar_pci_write_reg(pcie->base, 0x801f0000, PCIEMSITXR); > + > + rcar_rmw32(pcie->base, MACCTLR, MACCTLR_RESERVED, 0); > + > + /* Finish initialization - establish a PCI Express link */ > + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR); > + > + /* This will timeout if we don't have a link. */ > + err = rcar_pcie_wait_for_dl(pcie->base); > + if (err) > + return err; > + > + /* Enable INTx interrupts */ > + rcar_rmw32(pcie->base, PCIEINTXR, 0, 0xF << 8); > + > + /* flush modifications */ > + wmb(); > + > + return 0; > +} > + > +static int rcar_pcie_phy_init_h1(struct rcar_pcie *pcie) > +{ > + /* Initialize the phy */ > + phy_write_reg(pcie, 0, 0x42, 0x1, 0x0EC34191); > + phy_write_reg(pcie, 1, 0x42, 0x1, 0x0EC34180); > + phy_write_reg(pcie, 0, 0x43, 0x1, 0x00210188); > + phy_write_reg(pcie, 1, 0x43, 0x1, 0x00210188); > + phy_write_reg(pcie, 0, 0x44, 0x1, 0x015C0014); > + phy_write_reg(pcie, 1, 0x44, 0x1, 0x015C0014); > + phy_write_reg(pcie, 1, 0x4C, 0x1, 0x786174A0); > + phy_write_reg(pcie, 1, 0x4D, 0x1, 0x048000BB); > + phy_write_reg(pcie, 0, 0x51, 0x1, 0x079EC062); > + phy_write_reg(pcie, 0, 0x52, 0x1, 0x20000000); > + phy_write_reg(pcie, 1, 0x52, 0x1, 0x20000000); > + phy_write_reg(pcie, 1, 0x56, 0x1, 0x00003806); > + > + phy_write_reg(pcie, 0, 0x60, 0x1, 0x004B03A5); > + phy_write_reg(pcie, 0, 0x64, 0x1, 0x3F0F1F0F); > + phy_write_reg(pcie, 0, 0x66, 0x1, 0x00008000); > + > + return 0; > +} > + > +static int rcar_pcie_phy_init_gen2(struct rcar_pcie *pcie) > +{ > + /* > + * These settings come from the R-Car Series, 2nd Generation User's > + * Manual, section 50.3.1 (2) Initialization of the physical layer. > + */ > + rcar_pci_write_reg(pcie->base, 0x000f0030, GEN2_PCIEPHYADDR); > + rcar_pci_write_reg(pcie->base, 0x00381203, GEN2_PCIEPHYDATA); > + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL); > + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL); > + > + rcar_pci_write_reg(pcie->base, 0x000f0054, GEN2_PCIEPHYADDR); > + /* The following value is for DC connection, no termination resistor */ > + rcar_pci_write_reg(pcie->base, 0x13802007, GEN2_PCIEPHYDATA); > + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL); > + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL); > + > + return 0; > +} > + > +static int rcar_pcie_phy_init_gen3(struct rcar_pcie *pcie) > +{ > + int err; > + > + err = phy_init(pcie->phy); > + if (err) > + return err; > + > + err = phy_power_on(pcie->phy); > + if (err) > + phy_exit(pcie->phy); > + > + return err; > +} > + > +static int rcar_msi_alloc(struct rcar_msi *chip) > +{ > + int msi; > + > + mutex_lock(&chip->lock); > + > + msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR); > + if (msi < INT_PCI_MSI_NR) > + set_bit(msi, chip->used); > + else > + msi = -ENOSPC; > + > + mutex_unlock(&chip->lock); > + > + return msi; > +} > + > +static int rcar_msi_alloc_region(struct rcar_msi *chip, int no_irqs) > +{ > + int msi; > + > + mutex_lock(&chip->lock); > + msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR, > + order_base_2(no_irqs)); > + mutex_unlock(&chip->lock); > + > + return msi; > +} > + > +static void rcar_msi_free(struct rcar_msi *chip, unsigned long irq) > +{ > + mutex_lock(&chip->lock); > + clear_bit(irq, chip->used); > + mutex_unlock(&chip->lock); > +} > + > +static irqreturn_t rcar_pcie_msi_irq(int irq, void *data) > +{ > + struct rcar_pcie *pcie = data; > + struct rcar_msi *msi = &pcie->msi; > + struct device *dev = pcie->dev; > + unsigned long reg; > + > + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR); > + > + /* MSI & INTx share an interrupt - we only handle MSI here */ > + if (!reg) > + return IRQ_NONE; > + > + while (reg) { > + unsigned int index = find_first_bit(®, 32); > + unsigned int msi_irq; > + > + /* clear the interrupt */ > + rcar_pci_write_reg(pcie->base, 1 << index, PCIEMSIFR); > + > + msi_irq = irq_find_mapping(msi->domain, index); > + if (msi_irq) { > + if (test_bit(index, msi->used)) > + generic_handle_irq(msi_irq); > + else > + dev_info(dev, "unhandled MSI\n"); > + } else { > + /* Unknown MSI, just clear it */ > + dev_dbg(dev, "unexpected MSI\n"); > + } > + > + /* see if there's any more pending in this vector */ > + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR); > + } > + > + return IRQ_HANDLED; > +} > + > +static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, > + struct msi_desc *desc) > +{ > + struct rcar_msi *msi = to_rcar_msi(chip); > + struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); > + struct msi_msg msg; > + unsigned int irq; > + int hwirq; > + > + hwirq = rcar_msi_alloc(msi); > + if (hwirq < 0) > + return hwirq; > + > + irq = irq_find_mapping(msi->domain, hwirq); > + if (!irq) { > + rcar_msi_free(msi, hwirq); > + return -EINVAL; > + } > + > + irq_set_msi_desc(irq, desc); > + > + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE; > + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR); > + msg.data = hwirq; > + > + pci_write_msi_msg(irq, &msg); > + > + return 0; > +} > + > +static int rcar_msi_setup_irqs(struct msi_controller *chip, > + struct pci_dev *pdev, int nvec, int type) > +{ > + struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); > + struct rcar_msi *msi = to_rcar_msi(chip); > + struct msi_desc *desc; > + struct msi_msg msg; > + unsigned int irq; > + int hwirq; > + int i; > + > + /* MSI-X interrupts are not supported */ > + if (type == PCI_CAP_ID_MSIX) > + return -EINVAL; > + > + WARN_ON(!list_is_singular(&pdev->dev.msi_list)); > + desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list); > + > + hwirq = rcar_msi_alloc_region(msi, nvec); > + if (hwirq < 0) > + return -ENOSPC; > + > + irq = irq_find_mapping(msi->domain, hwirq); > + if (!irq) > + return -ENOSPC; > + > + for (i = 0; i < nvec; i++) { > + /* > + * irq_create_mapping() called from rcar_pcie_probe() pre- > + * allocates descs, so there is no need to allocate descs here. > + * We can therefore assume that if irq_find_mapping() above > + * returns non-zero, then the descs are also successfully > + * allocated. > + */ > + if (irq_set_msi_desc_off(irq, i, desc)) { > + /* TODO: clear */ > + return -EINVAL; > + } > + } > + > + desc->nvec_used = nvec; > + desc->msi_attrib.multiple = order_base_2(nvec); > + > + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE; > + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR); > + msg.data = hwirq; > + > + pci_write_msi_msg(irq, &msg); > + > + return 0; > +} > + > +static void rcar_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) > +{ > + struct irq_data *d = irq_get_irq_data(irq); > + struct rcar_msi *msi = to_rcar_msi(chip); > + > + rcar_msi_free(msi, d->hwirq); > +} > + > +static struct irq_chip rcar_msi_irq_chip = { > + .name = "R-Car PCIe MSI", > + .irq_enable = pci_msi_unmask_irq, > + .irq_disable = pci_msi_mask_irq, > + .irq_mask = pci_msi_mask_irq, > + .irq_unmask = pci_msi_unmask_irq, > +}; > + > +static int rcar_msi_map(struct irq_domain *domain, unsigned int irq, > + irq_hw_number_t hwirq) > +{ > + irq_set_chip_and_handler(irq, &rcar_msi_irq_chip, handle_simple_irq); > + irq_set_chip_data(irq, domain->host_data); > + > + return 0; > +} > + > +static const struct irq_domain_ops msi_domain_ops = { > + .map = rcar_msi_map, > +}; > + > +static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie) > +{ > + struct rcar_msi *msi = &pcie->msi; > + int i, irq; > + > + for (i = 0; i < INT_PCI_MSI_NR; i++) { > + irq = irq_find_mapping(msi->domain, i); > + if (irq > 0) > + irq_dispose_mapping(irq); > + } > + > + irq_domain_remove(msi->domain); > +} > + > +static int rcar_pcie_enable_msi(struct rcar_pcie *pcie) > +{ > + struct rcar_msi *msi = &pcie->msi; > + struct device *dev = pcie->dev; > + phys_addr_t base; > + int err, i; > + > + mutex_init(&msi->lock); > + > + msi->chip.dev = dev; > + msi->chip.setup_irq = rcar_msi_setup_irq; > + msi->chip.setup_irqs = rcar_msi_setup_irqs; > + msi->chip.teardown_irq = rcar_msi_teardown_irq; > + > + msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR, > + &msi_domain_ops, &msi->chip); > + if (!msi->domain) { > + dev_err(dev, "failed to create IRQ domain\n"); > + return -ENOMEM; > + } > + > + for (i = 0; i < INT_PCI_MSI_NR; i++) > + irq_create_mapping(msi->domain, i); > + > + /* Two irqs are for MSI, but they are also used for non-MSI irqs */ > + err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, > + IRQF_SHARED | IRQF_NO_THREAD, > + rcar_msi_irq_chip.name, pcie); > + if (err < 0) { > + dev_err(dev, "failed to request IRQ: %d\n", err); > + goto err; > + } > + > + err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, > + IRQF_SHARED | IRQF_NO_THREAD, > + rcar_msi_irq_chip.name, pcie); > + if (err < 0) { > + dev_err(dev, "failed to request IRQ: %d\n", err); > + goto err; > + } > + > + /* setup MSI data target */ > + msi->pages = __get_free_pages(GFP_KERNEL, 0); > + if (!msi->pages) { > + err = -ENOMEM; > + goto err; > + } > + base = virt_to_phys((void *)msi->pages); > + > + rcar_pci_write_reg(pcie->base, lower_32_bits(base) | MSIFE, PCIEMSIALR); > + rcar_pci_write_reg(pcie->base, upper_32_bits(base), PCIEMSIAUR); > + > + /* enable all MSI interrupts */ > + rcar_pci_write_reg(pcie->base, 0xffffffff, PCIEMSIIER); > + > + return 0; > + > +err: > + rcar_pcie_unmap_msi(pcie); > + return err; > +} > + > +static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie) > +{ > + struct rcar_msi *msi = &pcie->msi; > + > + /* Disable all MSI interrupts */ > + rcar_pci_write_reg(pcie->base, 0, PCIEMSIIER); > + > + /* Disable address decoding of the MSI interrupt, MSIFE */ > + rcar_pci_write_reg(pcie->base, 0, PCIEMSIALR); > + > + free_pages(msi->pages, 0); > + > + rcar_pcie_unmap_msi(pcie); > +} > + > +static int rcar_pcie_get_resources(struct rcar_pcie *pcie) > +{ > + struct device *dev = pcie->dev; > + struct resource res; > + int err, i; > + > + pcie->phy = devm_phy_optional_get(dev, "pcie"); > + if (IS_ERR(pcie->phy)) > + return PTR_ERR(pcie->phy); > + > + err = of_address_to_resource(dev->of_node, 0, &res); > + if (err) > + return err; > + > + pcie->base = devm_ioremap_resource(dev, &res); > + if (IS_ERR(pcie->base)) > + return PTR_ERR(pcie->base); > + > + pcie->bus_clk = devm_clk_get(dev, "pcie_bus"); > + if (IS_ERR(pcie->bus_clk)) { > + dev_err(dev, "cannot get pcie bus clock\n"); > + return PTR_ERR(pcie->bus_clk); > + } > + > + i = irq_of_parse_and_map(dev->of_node, 0); > + if (!i) { > + dev_err(dev, "cannot get platform resources for msi interrupt\n"); > + err = -ENOENT; > + goto err_irq1; > + } > + pcie->msi.irq1 = i; > + > + i = irq_of_parse_and_map(dev->of_node, 1); > + if (!i) { > + dev_err(dev, "cannot get platform resources for msi interrupt\n"); > + err = -ENOENT; > + goto err_irq2; > + } > + pcie->msi.irq2 = i; > + > + return 0; > + > +err_irq2: > + irq_dispose_mapping(pcie->msi.irq1); > +err_irq1: > + return err; > +} > + > +static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie, > + struct of_pci_range *range, > + int *index) > +{ > + u64 restype = range->flags; > + u64 cpu_addr = range->cpu_addr; > + u64 cpu_end = range->cpu_addr + range->size; > + u64 pci_addr = range->pci_addr; > + u32 flags = LAM_64BIT | LAR_ENABLE; > + u64 mask; > + u64 size; > + int idx = *index; > + > + if (restype & IORESOURCE_PREFETCH) > + flags |= LAM_PREFETCH; > + > + /* > + * If the size of the range is larger than the alignment of the start > + * address, we have to use multiple entries to perform the mapping. > + */ > + if (cpu_addr > 0) { > + unsigned long nr_zeros = __ffs64(cpu_addr); > + u64 alignment = 1ULL << nr_zeros; > + > + size = min(range->size, alignment); > + } else { > + size = range->size; > + } > + /* Hardware supports max 4GiB inbound region */ > + size = min(size, 1ULL << 32); > + > + mask = roundup_pow_of_two(size) - 1; > + mask &= ~0xf; > + > + while (cpu_addr < cpu_end) { > + rcar_pcie_set_inbound(pcie->base, cpu_addr, pci_addr, > + mask | flags, idx, true); > + pci_addr += size; > + cpu_addr += size; > + idx += 2; > + > + if (idx > MAX_NR_INBOUND_MAPS) { > + dev_err(pcie->dev, "Failed to map inbound regions!\n"); > + return -EINVAL; > + } > + } > + *index = idx; > + > + return 0; > +} > + > +static int rcar_pcie_parse_map_dma_ranges(struct rcar_pcie *pcie, > + struct device_node *np) > +{ > + struct of_pci_range_parser parser; > + struct of_pci_range range; > + int index = 0; > + int err; > + > + if (of_pci_dma_range_parser_init(&parser, np)) > + return -EINVAL; > + > + /* Get the dma-ranges from DT */ > + for_each_of_pci_range(&parser, &range) { > + u64 end = range.cpu_addr + range.size - 1; > + > + dev_dbg(pcie->dev, "0x%08x 0x%016llx..0x%016llx -> 0x%016llx\n", > + range.flags, range.cpu_addr, end, range.pci_addr); > + > + err = rcar_pcie_inbound_ranges(pcie, &range, &index); > + if (err) > + return err; > + } > + > + return 0; > +} > + > +static const struct of_device_id rcar_pcie_of_match[] = { > + { .compatible = "renesas,pcie-r8a7779", > + .data = rcar_pcie_phy_init_h1 }, > + { .compatible = "renesas,pcie-r8a7790", > + .data = rcar_pcie_phy_init_gen2 }, > + { .compatible = "renesas,pcie-r8a7791", > + .data = rcar_pcie_phy_init_gen2 }, > + { .compatible = "renesas,pcie-rcar-gen2", > + .data = rcar_pcie_phy_init_gen2 }, > + { .compatible = "renesas,pcie-r8a7795", > + .data = rcar_pcie_phy_init_gen3 }, > + { .compatible = "renesas,pcie-rcar-gen3", > + .data = rcar_pcie_phy_init_gen3 }, > + {}, > +}; > + > +static int rcar_pcie_probe(struct platform_device *pdev) > +{ > + int (*phy_init_fn)(struct rcar_pcie *pcie); > + struct device *dev = &pdev->dev; > + struct pci_host_bridge *bridge; > + struct rcar_pcie *pcie; > + u32 data; > + int err; > + > + bridge = pci_alloc_host_bridge(sizeof(*pcie)); > + if (!bridge) > + return -ENOMEM; > + > + pcie = pci_host_bridge_priv(bridge); > + > + pcie->dev = dev; > + platform_set_drvdata(pdev, pcie); > + > + err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL); > + if (err) > + goto err_free_bridge; > + > + pm_runtime_enable(pcie->dev); > + err = pm_runtime_get_sync(pcie->dev); > + if (err < 0) { > + dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); > + goto err_pm_disable; > + } > + > + err = rcar_pcie_get_resources(pcie); > + if (err < 0) { > + dev_err(dev, "failed to request resources: %d\n", err); > + goto err_pm_put; > + } > + > + err = clk_prepare_enable(pcie->bus_clk); > + if (err) { > + dev_err(dev, "failed to enable bus clock: %d\n", err); > + goto err_unmap_msi_irqs; > + } > + > + err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node); > + if (err) > + goto err_clk_disable; > + > + phy_init_fn = of_device_get_match_data(dev); > + err = phy_init_fn(pcie); > + if (err) { > + dev_err(dev, "failed to init PCIe PHY\n"); > + goto err_clk_disable; > + } > + > + /* Failure to get a link might just be that no cards are inserted */ > + if (rcar_pcie_hw_init(pcie)) { > + dev_info(dev, "PCIe link down\n"); > + err = -ENODEV; > + goto err_phy_shutdown; > + } > + > + data = rcar_pci_read_reg(pcie->base, MACSR); > + dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f); > + > + if (IS_ENABLED(CONFIG_PCI_MSI)) { > + err = rcar_pcie_enable_msi(pcie); > + if (err < 0) { > + dev_err(dev, > + "failed to enable MSI support: %d\n", > + err); > + goto err_phy_shutdown; > + } > + } > + > + err = rcar_pcie_enable(pcie); > + if (err) > + goto err_msi_teardown; > + > + return 0; > + > +err_msi_teardown: > + if (IS_ENABLED(CONFIG_PCI_MSI)) > + rcar_pcie_teardown_msi(pcie); > + > +err_phy_shutdown: > + if (pcie->phy) { > + phy_power_off(pcie->phy); > + phy_exit(pcie->phy); > + } > + > +err_clk_disable: > + clk_disable_unprepare(pcie->bus_clk); > + > +err_unmap_msi_irqs: > + irq_dispose_mapping(pcie->msi.irq2); > + irq_dispose_mapping(pcie->msi.irq1); > + > +err_pm_put: > + pm_runtime_put(dev); > + > +err_pm_disable: > + pm_runtime_disable(dev); > + pci_free_resource_list(&pcie->resources); > + > +err_free_bridge: > + pci_free_host_bridge(bridge); > + > + return err; > +} > + > +static int rcar_pcie_resume_noirq(struct device *dev) > +{ > + struct rcar_pcie *pcie = dev_get_drvdata(dev); > + > + if (rcar_pci_read_reg(pcie->base, PMSR) && > + !(rcar_pci_read_reg(pcie->base, PCIETCTLR) & DL_DOWN)) > + return 0; > + > + /* Re-establish the PCIe link */ > + rcar_rmw32(pcie->base, MACCTLR, MACCTLR_RESERVED, 0); > + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR); > + return rcar_pcie_wait_for_dl(pcie->base); > +} > + > +static const struct dev_pm_ops rcar_pcie_pm_ops = { > + .resume_noirq = rcar_pcie_resume_noirq, > +}; > + > +static struct platform_driver rcar_pcie_driver = { > + .driver = { > + .name = "rcar-pcie", > + .of_match_table = rcar_pcie_of_match, > + .pm = &rcar_pcie_pm_ops, > + .suppress_bind_attrs = true, > + }, > + .probe = rcar_pcie_probe, > +}; > +builtin_platform_driver(rcar_pcie_driver); > diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c > index e45bb2a7bfa5..1008ae6a896c 100644 > --- a/drivers/pci/controller/pcie-rcar.c > +++ b/drivers/pci/controller/pcie-rcar.c > @@ -1,7 +1,7 @@ > // SPDX-License-Identifier: GPL-2.0 > /* > * PCIe driver for Renesas R-Car SoCs > - * Copyright (C) 2014 Renesas Electronics Europe Ltd > + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd > * > * Based on: > * arch/sh/drivers/pci/pcie-sh7786.c > @@ -11,534 +11,80 @@ > * Author: Phil Edworthy <phil.edworthy@renesas.com> > */ > > -#include <linux/bitops.h> > -#include <linux/clk.h> > #include <linux/delay.h> > -#include <linux/interrupt.h> > -#include <linux/irq.h> > -#include <linux/irqdomain.h> > -#include <linux/kernel.h> > -#include <linux/init.h> > -#include <linux/msi.h> > -#include <linux/of_address.h> > -#include <linux/of_irq.h> > -#include <linux/of_pci.h> > -#include <linux/of_platform.h> > #include <linux/pci.h> > -#include <linux/phy/phy.h> > -#include <linux/platform_device.h> > -#include <linux/pm_runtime.h> > -#include <linux/slab.h> > > -#define PCIECAR 0x000010 > -#define PCIECCTLR 0x000018 > -#define CONFIG_SEND_ENABLE BIT(31) > -#define TYPE0 (0 << 8) > -#define TYPE1 BIT(8) > -#define PCIECDR 0x000020 > -#define PCIEMSR 0x000028 > -#define PCIEINTXR 0x000400 > -#define PCIEPHYSR 0x0007f0 > -#define PHYRDY BIT(0) > -#define PCIEMSITXR 0x000840 > +#include "pcie-rcar.h" > > -/* Transfer control */ > -#define PCIETCTLR 0x02000 > -#define DL_DOWN BIT(3) > -#define CFINIT BIT(0) > -#define PCIETSTR 0x02004 > -#define DATA_LINK_ACTIVE BIT(0) > -#define PCIEERRFR 0x02020 > -#define UNSUPPORTED_REQUEST BIT(4) > -#define PCIEMSIFR 0x02044 > -#define PCIEMSIALR 0x02048 > -#define MSIFE BIT(0) > -#define PCIEMSIAUR 0x0204c > -#define PCIEMSIIER 0x02050 > - > -/* root port address */ > -#define PCIEPRAR(x) (0x02080 + ((x) * 0x4)) > - > -/* local address reg & mask */ > -#define PCIELAR(x) (0x02200 + ((x) * 0x20)) > -#define PCIELAMR(x) (0x02208 + ((x) * 0x20)) > -#define LAM_PREFETCH BIT(3) > -#define LAM_64BIT BIT(2) > -#define LAR_ENABLE BIT(1) > - > -/* PCIe address reg & mask */ > -#define PCIEPALR(x) (0x03400 + ((x) * 0x20)) > -#define PCIEPAUR(x) (0x03404 + ((x) * 0x20)) > -#define PCIEPAMR(x) (0x03408 + ((x) * 0x20)) > -#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20)) > -#define PAR_ENABLE BIT(31) > -#define IO_SPACE BIT(8) > - > -/* Configuration */ > -#define PCICONF(x) (0x010000 + ((x) * 0x4)) > -#define PMCAP(x) (0x010040 + ((x) * 0x4)) > -#define EXPCAP(x) (0x010070 + ((x) * 0x4)) > -#define VCCAP(x) (0x010100 + ((x) * 0x4)) > - > -/* link layer */ > -#define IDSETR1 0x011004 > -#define TLCTLR 0x011048 > -#define MACSR 0x011054 > -#define SPCHGFIN BIT(4) > -#define SPCHGFAIL BIT(6) > -#define SPCHGSUC BIT(7) > -#define LINK_SPEED (0xf << 16) > -#define LINK_SPEED_2_5GTS (1 << 16) > -#define LINK_SPEED_5_0GTS (2 << 16) > -#define MACCTLR 0x011058 > -#define MACCTLR_RESERVED BIT(0) > -#define SPEED_CHANGE BIT(24) > -#define SCRAMBLE_DISABLE BIT(27) > -#define PMSR 0x01105c > -#define MACS2R 0x011078 > -#define MACCGSPSETR 0x011084 > -#define SPCNGRSN BIT(31) > - > -/* R-Car H1 PHY */ > -#define H1_PCIEPHYADRR 0x04000c > -#define WRITE_CMD BIT(16) > -#define PHY_ACK BIT(24) > -#define RATE_POS 12 > -#define LANE_POS 8 > -#define ADR_POS 0 > -#define H1_PCIEPHYDOUTR 0x040014 > - > -/* R-Car Gen2 PHY */ > -#define GEN2_PCIEPHYADDR 0x780 > -#define GEN2_PCIEPHYDATA 0x784 > -#define GEN2_PCIEPHYCTRL 0x78c > - > -#define INT_PCI_MSI_NR 32 > - > -#define RCONF(x) (PCICONF(0) + (x)) > -#define RPMCAP(x) (PMCAP(0) + (x)) > -#define REXPCAP(x) (EXPCAP(0) + (x)) > -#define RVCCAP(x) (VCCAP(0) + (x)) > - > -#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24) > -#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19) > -#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16) > - > -#define RCAR_PCI_MAX_RESOURCES 4 > -#define MAX_NR_INBOUND_MAPS 6 > - > -struct rcar_msi { > - DECLARE_BITMAP(used, INT_PCI_MSI_NR); > - struct irq_domain *domain; > - struct msi_controller chip; > - unsigned long pages; > - struct mutex lock; > - int irq1; > - int irq2; > -}; > - > -static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip) > -{ > - return container_of(chip, struct rcar_msi, chip); > -} > - > -/* Structure representing the PCIe interface */ > -struct rcar_pcie { > - struct device *dev; > - struct phy *phy; > - void __iomem *base; > - struct list_head resources; > - int root_bus_nr; > - struct clk *bus_clk; > - struct rcar_msi msi; > -}; > - > -static void rcar_pci_write_reg(struct rcar_pcie *pcie, u32 val, > - unsigned int reg) > +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg) > { > - writel(val, pcie->base + reg); > + writel(val, base + reg); > } > > -static u32 rcar_pci_read_reg(struct rcar_pcie *pcie, unsigned int reg) > +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg) > { > - return readl(pcie->base + reg); > + return readl(base + reg); > } > > -enum { > - RCAR_PCI_ACCESS_READ, > - RCAR_PCI_ACCESS_WRITE, > -}; > - > -static void rcar_rmw32(struct rcar_pcie *pcie, int where, u32 mask, u32 data) > +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data) > { > unsigned int shift = BITS_PER_BYTE * (where & 3); > - u32 val = rcar_pci_read_reg(pcie, where & ~3); > + u32 val = rcar_pci_read_reg(base, where & ~3); > > val &= ~(mask << shift); > val |= data << shift; > - rcar_pci_write_reg(pcie, val, where & ~3); > -} > - > -static u32 rcar_read_conf(struct rcar_pcie *pcie, int where) > -{ > - unsigned int shift = BITS_PER_BYTE * (where & 3); > - u32 val = rcar_pci_read_reg(pcie, where & ~3); > - > - return val >> shift; > + rcar_pci_write_reg(base, val, where & ~3); > } > > -/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ > -static int rcar_pcie_config_access(struct rcar_pcie *pcie, > - unsigned char access_type, struct pci_bus *bus, > - unsigned int devfn, int where, u32 *data) > -{ > - unsigned int dev, func, reg, index; > - > - dev = PCI_SLOT(devfn); > - func = PCI_FUNC(devfn); > - reg = where & ~3; > - index = reg / 4; > - > - /* > - * While each channel has its own memory-mapped extended config > - * space, it's generally only accessible when in endpoint mode. > - * When in root complex mode, the controller is unable to target > - * itself with either type 0 or type 1 accesses, and indeed, any > - * controller initiated target transfer to its own config space > - * result in a completer abort. > - * > - * Each channel effectively only supports a single device, but as > - * the same channel <-> device access works for any PCI_SLOT() > - * value, we cheat a bit here and bind the controller's config > - * space to devfn 0 in order to enable self-enumeration. In this > - * case the regular ECAR/ECDR path is sidelined and the mangled > - * config access itself is initiated as an internal bus transaction. > - */ > - if (pci_is_root_bus(bus)) { > - if (dev != 0) > - return PCIBIOS_DEVICE_NOT_FOUND; > - > - if (access_type == RCAR_PCI_ACCESS_READ) { > - *data = rcar_pci_read_reg(pcie, PCICONF(index)); > - } else { > - /* Keep an eye out for changes to the root bus number */ > - if (pci_is_root_bus(bus) && (reg == PCI_PRIMARY_BUS)) > - pcie->root_bus_nr = *data & 0xff; > - > - rcar_pci_write_reg(pcie, *data, PCICONF(index)); > - } > - > - return PCIBIOS_SUCCESSFUL; > - } > - > - if (pcie->root_bus_nr < 0) > - return PCIBIOS_DEVICE_NOT_FOUND; > - > - /* Clear errors */ > - rcar_pci_write_reg(pcie, rcar_pci_read_reg(pcie, PCIEERRFR), PCIEERRFR); > - > - /* Set the PIO address */ > - rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | > - PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR); > - > - /* Enable the configuration access */ > - if (bus->parent->number == pcie->root_bus_nr) > - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR); > - else > - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR); > - > - /* Check for errors */ > - if (rcar_pci_read_reg(pcie, PCIEERRFR) & UNSUPPORTED_REQUEST) > - return PCIBIOS_DEVICE_NOT_FOUND; > - > - /* Check for master and target aborts */ > - if (rcar_read_conf(pcie, RCONF(PCI_STATUS)) & > - (PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT)) > - return PCIBIOS_DEVICE_NOT_FOUND; > - > - if (access_type == RCAR_PCI_ACCESS_READ) > - *data = rcar_pci_read_reg(pcie, PCIECDR); > - else > - rcar_pci_write_reg(pcie, *data, PCIECDR); > - > - /* Disable the configuration access */ > - rcar_pci_write_reg(pcie, 0, PCIECCTLR); > - > - return PCIBIOS_SUCCESSFUL; > -} > - > -static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn, > - int where, int size, u32 *val) > -{ > - struct rcar_pcie *pcie = bus->sysdata; > - int ret; > - > - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, > - bus, devfn, where, val); > - if (ret != PCIBIOS_SUCCESSFUL) { > - *val = 0xffffffff; > - return ret; > - } > - > - if (size == 1) > - *val = (*val >> (BITS_PER_BYTE * (where & 3))) & 0xff; > - else if (size == 2) > - *val = (*val >> (BITS_PER_BYTE * (where & 2))) & 0xffff; > - > - dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", > - bus->number, devfn, where, size, *val); > - > - return ret; > -} > - > -/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ > -static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn, > - int where, int size, u32 val) > -{ > - struct rcar_pcie *pcie = bus->sysdata; > - unsigned int shift; > - u32 data; > - int ret; > - > - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, > - bus, devfn, where, &data); > - if (ret != PCIBIOS_SUCCESSFUL) > - return ret; > - > - dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", > - bus->number, devfn, where, size, val); > - > - if (size == 1) { > - shift = BITS_PER_BYTE * (where & 3); > - data &= ~(0xff << shift); > - data |= ((val & 0xff) << shift); > - } else if (size == 2) { > - shift = BITS_PER_BYTE * (where & 2); > - data &= ~(0xffff << shift); > - data |= ((val & 0xffff) << shift); > - } else > - data = val; > - > - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_WRITE, > - bus, devfn, where, &data); > - > - return ret; > -} > - > -static struct pci_ops rcar_pcie_ops = { > - .read = rcar_pcie_read_conf, > - .write = rcar_pcie_write_conf, > -}; > - > -static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie, > - struct resource *res) > +void rcar_pcie_set_outbound(int win, void __iomem *base, > + struct resource *res, bool host) > { > /* Setup PCIe address space mappings for each resource */ > - resource_size_t size; > - resource_size_t res_start; > - u32 mask; > - > - rcar_pci_write_reg(pcie, 0x00000000, PCIEPTCTLR(win)); > + resource_size_t size = 0; > + resource_size_t res_start = 0; > + u32 mask = 0x0; > > + rcar_pci_write_reg(base, mask, PCIEPTCTLR(win)); > /* > * The PAMR mask is calculated in units of 128Bytes, which > * keeps things pretty simple. > */ > size = resource_size(res); > - mask = (roundup_pow_of_two(size) / SZ_128) - 1; > - rcar_pci_write_reg(pcie, mask << 7, PCIEPAMR(win)); > + if (size > 128) > + mask = (roundup_pow_of_two(size) / SZ_128) - 1; > + rcar_pci_write_reg(base, mask << 7, PCIEPAMR(win)); > > - if (res->flags & IORESOURCE_IO) > - res_start = pci_pio_to_address(res->start); > - else > + if (!host) { > res_start = res->start; > + } else { > + if (res->flags & IORESOURCE_IO) > + res_start = pci_pio_to_address(res->start); > + else > + res_start = res->start; > + } > > - rcar_pci_write_reg(pcie, upper_32_bits(res_start), PCIEPAUR(win)); > - rcar_pci_write_reg(pcie, lower_32_bits(res_start) & ~0x7F, > + rcar_pci_write_reg(base, upper_32_bits(res_start), PCIEPAUR(win)); > + rcar_pci_write_reg(base, lower_32_bits(res_start) & ~0x7F, > PCIEPALR(win)); > > - /* First resource is for IO */ > - mask = PAR_ENABLE; > + mask = 0x0; > + if (res->start) > + mask = PAR_ENABLE; > + > if (res->flags & IORESOURCE_IO) > mask |= IO_SPACE; > > - rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win)); > -} > - > -static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) > -{ > - struct resource_entry *win; > - int i = 0; > - > - /* Setup PCI resources */ > - resource_list_for_each_entry(win, &pci->resources) { > - struct resource *res = win->res; > - > - if (!res->flags) > - continue; > - > - switch (resource_type(res)) { > - case IORESOURCE_IO: > - case IORESOURCE_MEM: > - rcar_pcie_setup_window(i, pci, res); > - i++; > - break; > - case IORESOURCE_BUS: > - pci->root_bus_nr = res->start; > - break; > - default: > - continue; > - } > - > - pci_add_resource(resource, res); > - } > - > - return 1; > -} > - > -static void rcar_pcie_force_speedup(struct rcar_pcie *pcie) > -{ > - struct device *dev = pcie->dev; > - unsigned int timeout = 1000; > - u32 macsr; > - > - if ((rcar_pci_read_reg(pcie, MACS2R) & LINK_SPEED) != LINK_SPEED_5_0GTS) > - return; > - > - if (rcar_pci_read_reg(pcie, MACCTLR) & SPEED_CHANGE) { > - dev_err(dev, "Speed change already in progress\n"); > - return; > - } > - > - macsr = rcar_pci_read_reg(pcie, MACSR); > - if ((macsr & LINK_SPEED) == LINK_SPEED_5_0GTS) > - goto done; > - > - /* Set target link speed to 5.0 GT/s */ > - rcar_rmw32(pcie, EXPCAP(12), PCI_EXP_LNKSTA_CLS, > - PCI_EXP_LNKSTA_CLS_5_0GB); > - > - /* Set speed change reason as intentional factor */ > - rcar_rmw32(pcie, MACCGSPSETR, SPCNGRSN, 0); > - > - /* Clear SPCHGFIN, SPCHGSUC, and SPCHGFAIL */ > - if (macsr & (SPCHGFIN | SPCHGSUC | SPCHGFAIL)) > - rcar_pci_write_reg(pcie, macsr, MACSR); > - > - /* Start link speed change */ > - rcar_rmw32(pcie, MACCTLR, SPEED_CHANGE, SPEED_CHANGE); > - > - while (timeout--) { > - macsr = rcar_pci_read_reg(pcie, MACSR); > - if (macsr & SPCHGFIN) { > - /* Clear the interrupt bits */ > - rcar_pci_write_reg(pcie, macsr, MACSR); > - > - if (macsr & SPCHGFAIL) > - dev_err(dev, "Speed change failed\n"); > - > - goto done; > - } > - > - msleep(1); > - } > - > - dev_err(dev, "Speed change timed out\n"); > - > -done: > - dev_info(dev, "Current link speed is %s GT/s\n", > - (macsr & LINK_SPEED) == LINK_SPEED_5_0GTS ? "5" : "2.5"); > -} > - > -static int rcar_pcie_enable(struct rcar_pcie *pcie) > -{ > - struct device *dev = pcie->dev; > - struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); > - struct pci_bus *bus, *child; > - int ret; > - > - /* Try setting 5 GT/s link speed */ > - rcar_pcie_force_speedup(pcie); > - > - rcar_pcie_setup(&bridge->windows, pcie); > - > - pci_add_flags(PCI_REASSIGN_ALL_BUS); > - > - bridge->dev.parent = dev; > - bridge->sysdata = pcie; > - bridge->busnr = pcie->root_bus_nr; > - bridge->ops = &rcar_pcie_ops; > - bridge->map_irq = of_irq_parse_and_map_pci; > - bridge->swizzle_irq = pci_common_swizzle; > - if (IS_ENABLED(CONFIG_PCI_MSI)) > - bridge->msi = &pcie->msi.chip; > - > - ret = pci_scan_root_bus_bridge(bridge); > - if (ret < 0) > - return ret; > - > - bus = bridge->bus; > - > - pci_bus_size_bridges(bus); > - pci_bus_assign_resources(bus); > - > - list_for_each_entry(child, &bus->children, node) > - pcie_bus_configure_settings(child); > - > - pci_bus_add_devices(bus); > - > - return 0; > -} > - > -static int phy_wait_for_ack(struct rcar_pcie *pcie) > -{ > - struct device *dev = pcie->dev; > - unsigned int timeout = 100; > - > - while (timeout--) { > - if (rcar_pci_read_reg(pcie, H1_PCIEPHYADRR) & PHY_ACK) > - return 0; > - > - udelay(100); > - } > - > - dev_err(dev, "Access to PCIe phy timed out\n"); > - > - return -ETIMEDOUT; > -} > - > -static void phy_write_reg(struct rcar_pcie *pcie, > - unsigned int rate, u32 addr, > - unsigned int lane, u32 data) > -{ > - u32 phyaddr; > - > - phyaddr = WRITE_CMD | > - ((rate & 1) << RATE_POS) | > - ((lane & 0xf) << LANE_POS) | > - ((addr & 0xff) << ADR_POS); > - > - /* Set write data */ > - rcar_pci_write_reg(pcie, data, H1_PCIEPHYDOUTR); > - rcar_pci_write_reg(pcie, phyaddr, H1_PCIEPHYADRR); > - > - /* Ignore errors as they will be dealt with if the data link is down */ > - phy_wait_for_ack(pcie); > - > - /* Clear command */ > - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYDOUTR); > - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYADRR); > - > - /* Ignore errors as they will be dealt with if the data link is down */ > - phy_wait_for_ack(pcie); > + rcar_pci_write_reg(base, mask, PCIEPTCTLR(win)); > + /* flush modifications */ > + wmb(); > } > > -static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie) > +int rcar_pcie_wait_for_phyrdy(void __iomem *base) > { > unsigned int timeout = 10; > > while (timeout--) { > - if (rcar_pci_read_reg(pcie, PCIEPHYSR) & PHYRDY) > + if (rcar_pci_read_reg(base, PCIEPHYSR) & PHYRDY) > return 0; > > msleep(5); > @@ -547,12 +93,12 @@ static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie) > return -ETIMEDOUT; > } > > -static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie) > +int rcar_pcie_wait_for_dl(void __iomem *base) > { > unsigned int timeout = 10000; > > while (timeout--) { > - if ((rcar_pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE)) > + if ((rcar_pci_read_reg(base, PCIETSTR) & DATA_LINK_ACTIVE)) > return 0; > > udelay(5); > @@ -562,698 +108,27 @@ static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie) > return -ETIMEDOUT; > } > > -static int rcar_pcie_hw_init(struct rcar_pcie *pcie) > -{ > - int err; > - > - /* Begin initialization */ > - rcar_pci_write_reg(pcie, 0, PCIETCTLR); > - > - /* Set mode */ > - rcar_pci_write_reg(pcie, 1, PCIEMSR); > - > - err = rcar_pcie_wait_for_phyrdy(pcie); > - if (err) > - return err; > - > - /* > - * Initial header for port config space is type 1, set the device > - * class to match. Hardware takes care of propagating the IDSETR > - * settings, so there is no need to bother with a quirk. > - */ > - rcar_pci_write_reg(pcie, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1); > - > - /* > - * Setup Secondary Bus Number & Subordinate Bus Number, even though > - * they aren't used, to avoid bridge being detected as broken. > - */ > - rcar_rmw32(pcie, RCONF(PCI_SECONDARY_BUS), 0xff, 1); > - rcar_rmw32(pcie, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1); > - > - /* Initialize default capabilities. */ > - rcar_rmw32(pcie, REXPCAP(0), 0xff, PCI_CAP_ID_EXP); > - rcar_rmw32(pcie, REXPCAP(PCI_EXP_FLAGS), > - PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4); > - rcar_rmw32(pcie, RCONF(PCI_HEADER_TYPE), 0x7f, > - PCI_HEADER_TYPE_BRIDGE); > - > - /* Enable data link layer active state reporting */ > - rcar_rmw32(pcie, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC, > - PCI_EXP_LNKCAP_DLLLARC); > - > - /* Write out the physical slot number = 0 */ > - rcar_rmw32(pcie, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0); > - > - /* Set the completion timer timeout to the maximum 50ms. */ > - rcar_rmw32(pcie, TLCTLR + 1, 0x3f, 50); > - > - /* Terminate list of capabilities (Next Capability Offset=0) */ > - rcar_rmw32(pcie, RVCCAP(0), 0xfff00000, 0); > - > - /* Enable MSI */ > - if (IS_ENABLED(CONFIG_PCI_MSI)) > - rcar_pci_write_reg(pcie, 0x801f0000, PCIEMSITXR); > - > - rcar_rmw32(pcie, MACCTLR, MACCTLR_RESERVED, 0); > - > - /* Finish initialization - establish a PCI Express link */ > - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR); > - > - /* This will timeout if we don't have a link. */ > - err = rcar_pcie_wait_for_dl(pcie); > - if (err) > - return err; > - > - /* Enable INTx interrupts */ > - rcar_rmw32(pcie, PCIEINTXR, 0, 0xF << 8); > - > - wmb(); > - > - return 0; > -} > - > -static int rcar_pcie_phy_init_h1(struct rcar_pcie *pcie) > -{ > - /* Initialize the phy */ > - phy_write_reg(pcie, 0, 0x42, 0x1, 0x0EC34191); > - phy_write_reg(pcie, 1, 0x42, 0x1, 0x0EC34180); > - phy_write_reg(pcie, 0, 0x43, 0x1, 0x00210188); > - phy_write_reg(pcie, 1, 0x43, 0x1, 0x00210188); > - phy_write_reg(pcie, 0, 0x44, 0x1, 0x015C0014); > - phy_write_reg(pcie, 1, 0x44, 0x1, 0x015C0014); > - phy_write_reg(pcie, 1, 0x4C, 0x1, 0x786174A0); > - phy_write_reg(pcie, 1, 0x4D, 0x1, 0x048000BB); > - phy_write_reg(pcie, 0, 0x51, 0x1, 0x079EC062); > - phy_write_reg(pcie, 0, 0x52, 0x1, 0x20000000); > - phy_write_reg(pcie, 1, 0x52, 0x1, 0x20000000); > - phy_write_reg(pcie, 1, 0x56, 0x1, 0x00003806); > - > - phy_write_reg(pcie, 0, 0x60, 0x1, 0x004B03A5); > - phy_write_reg(pcie, 0, 0x64, 0x1, 0x3F0F1F0F); > - phy_write_reg(pcie, 0, 0x66, 0x1, 0x00008000); > - > - return 0; > -} > - > -static int rcar_pcie_phy_init_gen2(struct rcar_pcie *pcie) > -{ > - /* > - * These settings come from the R-Car Series, 2nd Generation User's > - * Manual, section 50.3.1 (2) Initialization of the physical layer. > - */ > - rcar_pci_write_reg(pcie, 0x000f0030, GEN2_PCIEPHYADDR); > - rcar_pci_write_reg(pcie, 0x00381203, GEN2_PCIEPHYDATA); > - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); > - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); > - > - rcar_pci_write_reg(pcie, 0x000f0054, GEN2_PCIEPHYADDR); > - /* The following value is for DC connection, no termination resistor */ > - rcar_pci_write_reg(pcie, 0x13802007, GEN2_PCIEPHYDATA); > - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); > - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); > - > - return 0; > -} > - > -static int rcar_pcie_phy_init_gen3(struct rcar_pcie *pcie) > -{ > - int err; > - > - err = phy_init(pcie->phy); > - if (err) > - return err; > - > - err = phy_power_on(pcie->phy); > - if (err) > - phy_exit(pcie->phy); > - > - return err; > -} > - > -static int rcar_msi_alloc(struct rcar_msi *chip) > -{ > - int msi; > - > - mutex_lock(&chip->lock); > - > - msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR); > - if (msi < INT_PCI_MSI_NR) > - set_bit(msi, chip->used); > - else > - msi = -ENOSPC; > - > - mutex_unlock(&chip->lock); > - > - return msi; > -} > - > -static int rcar_msi_alloc_region(struct rcar_msi *chip, int no_irqs) > -{ > - int msi; > - > - mutex_lock(&chip->lock); > - msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR, > - order_base_2(no_irqs)); > - mutex_unlock(&chip->lock); > - > - return msi; > -} > - > -static void rcar_msi_free(struct rcar_msi *chip, unsigned long irq) > -{ > - mutex_lock(&chip->lock); > - clear_bit(irq, chip->used); > - mutex_unlock(&chip->lock); > -} > - > -static irqreturn_t rcar_pcie_msi_irq(int irq, void *data) > -{ > - struct rcar_pcie *pcie = data; > - struct rcar_msi *msi = &pcie->msi; > - struct device *dev = pcie->dev; > - unsigned long reg; > - > - reg = rcar_pci_read_reg(pcie, PCIEMSIFR); > - > - /* MSI & INTx share an interrupt - we only handle MSI here */ > - if (!reg) > - return IRQ_NONE; > - > - while (reg) { > - unsigned int index = find_first_bit(®, 32); > - unsigned int msi_irq; > - > - /* clear the interrupt */ > - rcar_pci_write_reg(pcie, 1 << index, PCIEMSIFR); > - > - msi_irq = irq_find_mapping(msi->domain, index); > - if (msi_irq) { > - if (test_bit(index, msi->used)) > - generic_handle_irq(msi_irq); > - else > - dev_info(dev, "unhandled MSI\n"); > - } else { > - /* Unknown MSI, just clear it */ > - dev_dbg(dev, "unexpected MSI\n"); > - } > - > - /* see if there's any more pending in this vector */ > - reg = rcar_pci_read_reg(pcie, PCIEMSIFR); > - } > - > - return IRQ_HANDLED; > -} > - > -static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, > - struct msi_desc *desc) > -{ > - struct rcar_msi *msi = to_rcar_msi(chip); > - struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); > - struct msi_msg msg; > - unsigned int irq; > - int hwirq; > - > - hwirq = rcar_msi_alloc(msi); > - if (hwirq < 0) > - return hwirq; > - > - irq = irq_find_mapping(msi->domain, hwirq); > - if (!irq) { > - rcar_msi_free(msi, hwirq); > - return -EINVAL; > - } > - > - irq_set_msi_desc(irq, desc); > - > - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; > - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); > - msg.data = hwirq; > - > - pci_write_msi_msg(irq, &msg); > - > - return 0; > -} > - > -static int rcar_msi_setup_irqs(struct msi_controller *chip, > - struct pci_dev *pdev, int nvec, int type) > -{ > - struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); > - struct rcar_msi *msi = to_rcar_msi(chip); > - struct msi_desc *desc; > - struct msi_msg msg; > - unsigned int irq; > - int hwirq; > - int i; > - > - /* MSI-X interrupts are not supported */ > - if (type == PCI_CAP_ID_MSIX) > - return -EINVAL; > - > - WARN_ON(!list_is_singular(&pdev->dev.msi_list)); > - desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list); > - > - hwirq = rcar_msi_alloc_region(msi, nvec); > - if (hwirq < 0) > - return -ENOSPC; > - > - irq = irq_find_mapping(msi->domain, hwirq); > - if (!irq) > - return -ENOSPC; > - > - for (i = 0; i < nvec; i++) { > - /* > - * irq_create_mapping() called from rcar_pcie_probe() pre- > - * allocates descs, so there is no need to allocate descs here. > - * We can therefore assume that if irq_find_mapping() above > - * returns non-zero, then the descs are also successfully > - * allocated. > - */ > - if (irq_set_msi_desc_off(irq, i, desc)) { > - /* TODO: clear */ > - return -EINVAL; > - } > - } > - > - desc->nvec_used = nvec; > - desc->msi_attrib.multiple = order_base_2(nvec); > - > - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; > - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); > - msg.data = hwirq; > - > - pci_write_msi_msg(irq, &msg); > - > - return 0; > -} > - > -static void rcar_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) > -{ > - struct rcar_msi *msi = to_rcar_msi(chip); > - struct irq_data *d = irq_get_irq_data(irq); > - > - rcar_msi_free(msi, d->hwirq); > -} > - > -static struct irq_chip rcar_msi_irq_chip = { > - .name = "R-Car PCIe MSI", > - .irq_enable = pci_msi_unmask_irq, > - .irq_disable = pci_msi_mask_irq, > - .irq_mask = pci_msi_mask_irq, > - .irq_unmask = pci_msi_unmask_irq, > -}; > - > -static int rcar_msi_map(struct irq_domain *domain, unsigned int irq, > - irq_hw_number_t hwirq) > -{ > - irq_set_chip_and_handler(irq, &rcar_msi_irq_chip, handle_simple_irq); > - irq_set_chip_data(irq, domain->host_data); > - > - return 0; > -} > - > -static const struct irq_domain_ops msi_domain_ops = { > - .map = rcar_msi_map, > -}; > - > -static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie) > -{ > - struct rcar_msi *msi = &pcie->msi; > - int i, irq; > - > - for (i = 0; i < INT_PCI_MSI_NR; i++) { > - irq = irq_find_mapping(msi->domain, i); > - if (irq > 0) > - irq_dispose_mapping(irq); > - } > - > - irq_domain_remove(msi->domain); > -} > - > -static int rcar_pcie_enable_msi(struct rcar_pcie *pcie) > -{ > - struct device *dev = pcie->dev; > - struct rcar_msi *msi = &pcie->msi; > - phys_addr_t base; > - int err, i; > - > - mutex_init(&msi->lock); > - > - msi->chip.dev = dev; > - msi->chip.setup_irq = rcar_msi_setup_irq; > - msi->chip.setup_irqs = rcar_msi_setup_irqs; > - msi->chip.teardown_irq = rcar_msi_teardown_irq; > - > - msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR, > - &msi_domain_ops, &msi->chip); > - if (!msi->domain) { > - dev_err(dev, "failed to create IRQ domain\n"); > - return -ENOMEM; > - } > - > - for (i = 0; i < INT_PCI_MSI_NR; i++) > - irq_create_mapping(msi->domain, i); > - > - /* Two irqs are for MSI, but they are also used for non-MSI irqs */ > - err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, > - IRQF_SHARED | IRQF_NO_THREAD, > - rcar_msi_irq_chip.name, pcie); > - if (err < 0) { > - dev_err(dev, "failed to request IRQ: %d\n", err); > - goto err; > - } > - > - err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, > - IRQF_SHARED | IRQF_NO_THREAD, > - rcar_msi_irq_chip.name, pcie); > - if (err < 0) { > - dev_err(dev, "failed to request IRQ: %d\n", err); > - goto err; > - } > - > - /* setup MSI data target */ > - msi->pages = __get_free_pages(GFP_KERNEL, 0); > - if (!msi->pages) { > - err = -ENOMEM; > - goto err; > - } > - base = virt_to_phys((void *)msi->pages); > - > - rcar_pci_write_reg(pcie, lower_32_bits(base) | MSIFE, PCIEMSIALR); > - rcar_pci_write_reg(pcie, upper_32_bits(base), PCIEMSIAUR); > - > - /* enable all MSI interrupts */ > - rcar_pci_write_reg(pcie, 0xffffffff, PCIEMSIIER); > - > - return 0; > - > -err: > - rcar_pcie_unmap_msi(pcie); > - return err; > -} > - > -static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie) > -{ > - struct rcar_msi *msi = &pcie->msi; > - > - /* Disable all MSI interrupts */ > - rcar_pci_write_reg(pcie, 0, PCIEMSIIER); > - > - /* Disable address decoding of the MSI interrupt, MSIFE */ > - rcar_pci_write_reg(pcie, 0, PCIEMSIALR); > - > - free_pages(msi->pages, 0); > - > - rcar_pcie_unmap_msi(pcie); > -} > - > -static int rcar_pcie_get_resources(struct rcar_pcie *pcie) > -{ > - struct device *dev = pcie->dev; > - struct resource res; > - int err, i; > - > - pcie->phy = devm_phy_optional_get(dev, "pcie"); > - if (IS_ERR(pcie->phy)) > - return PTR_ERR(pcie->phy); > - > - err = of_address_to_resource(dev->of_node, 0, &res); > - if (err) > - return err; > - > - pcie->base = devm_ioremap_resource(dev, &res); > - if (IS_ERR(pcie->base)) > - return PTR_ERR(pcie->base); > - > - pcie->bus_clk = devm_clk_get(dev, "pcie_bus"); > - if (IS_ERR(pcie->bus_clk)) { > - dev_err(dev, "cannot get pcie bus clock\n"); > - return PTR_ERR(pcie->bus_clk); > - } > - > - i = irq_of_parse_and_map(dev->of_node, 0); > - if (!i) { > - dev_err(dev, "cannot get platform resources for msi interrupt\n"); > - err = -ENOENT; > - goto err_irq1; > - } > - pcie->msi.irq1 = i; > - > - i = irq_of_parse_and_map(dev->of_node, 1); > - if (!i) { > - dev_err(dev, "cannot get platform resources for msi interrupt\n"); > - err = -ENOENT; > - goto err_irq2; > - } > - pcie->msi.irq2 = i; > - > - return 0; > - > -err_irq2: > - irq_dispose_mapping(pcie->msi.irq1); > -err_irq1: > - return err; > -} > - > -static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie, > - struct of_pci_range *range, > - int *index) > +void rcar_pcie_set_inbound(void __iomem *base, > + u64 cpu_addr, u64 pci_addr, > + u64 mask, int idx, bool host) > { > - u64 restype = range->flags; > - u64 cpu_addr = range->cpu_addr; > - u64 cpu_end = range->cpu_addr + range->size; > - u64 pci_addr = range->pci_addr; > - u32 flags = LAM_64BIT | LAR_ENABLE; > - u64 mask; > - u64 size; > - int idx = *index; > - > - if (restype & IORESOURCE_PREFETCH) > - flags |= LAM_PREFETCH; > - > /* > - * If the size of the range is larger than the alignment of the start > - * address, we have to use multiple entries to perform the mapping. > - */ > - if (cpu_addr > 0) { > - unsigned long nr_zeros = __ffs64(cpu_addr); > - u64 alignment = 1ULL << nr_zeros; > - > - size = min(range->size, alignment); > - } else { > - size = range->size; > - } > - /* Hardware supports max 4GiB inbound region */ > - size = min(size, 1ULL << 32); > - > - mask = roundup_pow_of_two(size) - 1; > - mask &= ~0xf; > - > - while (cpu_addr < cpu_end) { > - /* > - * Set up 64-bit inbound regions as the range parser doesn't > - * distinguish between 32 and 64-bit types. > - */ > - rcar_pci_write_reg(pcie, lower_32_bits(pci_addr), > + * Set up 64-bit inbound regions as the range parser doesn't > + * distinguish between 32 and 64-bit types. > + */ > + if (host) { > + rcar_pci_write_reg(base, lower_32_bits(pci_addr), > PCIEPRAR(idx)); > - rcar_pci_write_reg(pcie, lower_32_bits(cpu_addr), PCIELAR(idx)); > - rcar_pci_write_reg(pcie, lower_32_bits(mask) | flags, > - PCIELAMR(idx)); > - > - rcar_pci_write_reg(pcie, upper_32_bits(pci_addr), > + rcar_pci_write_reg(base, upper_32_bits(pci_addr), > PCIEPRAR(idx + 1)); > - rcar_pci_write_reg(pcie, upper_32_bits(cpu_addr), > - PCIELAR(idx + 1)); > - rcar_pci_write_reg(pcie, 0, PCIELAMR(idx + 1)); > - > - pci_addr += size; > - cpu_addr += size; > - idx += 2; > - > - if (idx > MAX_NR_INBOUND_MAPS) { > - dev_err(pcie->dev, "Failed to map inbound regions!\n"); > - return -EINVAL; > - } > } > - *index = idx; > - > - return 0; > -} > > -static int rcar_pcie_parse_map_dma_ranges(struct rcar_pcie *pcie, > - struct device_node *np) > -{ > - struct of_pci_range range; > - struct of_pci_range_parser parser; > - int index = 0; > - int err; > - > - if (of_pci_dma_range_parser_init(&parser, np)) > - return -EINVAL; > - > - /* Get the dma-ranges from DT */ > - for_each_of_pci_range(&parser, &range) { > - u64 end = range.cpu_addr + range.size - 1; > + rcar_pci_write_reg(base, lower_32_bits(cpu_addr), PCIELAR(idx)); > + rcar_pci_write_reg(base, lower_32_bits(mask), PCIELAMR(idx)); > > - dev_dbg(pcie->dev, "0x%08x 0x%016llx..0x%016llx -> 0x%016llx\n", > - range.flags, range.cpu_addr, end, range.pci_addr); > - > - err = rcar_pcie_inbound_ranges(pcie, &range, &index); > - if (err) > - return err; > - } > + rcar_pci_write_reg(base, upper_32_bits(cpu_addr), PCIELAR(idx + 1)); > + rcar_pci_write_reg(base, 0, PCIELAMR(idx + 1)); > > - return 0; > -} > - > -static const struct of_device_id rcar_pcie_of_match[] = { > - { .compatible = "renesas,pcie-r8a7779", > - .data = rcar_pcie_phy_init_h1 }, > - { .compatible = "renesas,pcie-r8a7790", > - .data = rcar_pcie_phy_init_gen2 }, > - { .compatible = "renesas,pcie-r8a7791", > - .data = rcar_pcie_phy_init_gen2 }, > - { .compatible = "renesas,pcie-rcar-gen2", > - .data = rcar_pcie_phy_init_gen2 }, > - { .compatible = "renesas,pcie-r8a7795", > - .data = rcar_pcie_phy_init_gen3 }, > - { .compatible = "renesas,pcie-rcar-gen3", > - .data = rcar_pcie_phy_init_gen3 }, > - {}, > -}; > - > -static int rcar_pcie_probe(struct platform_device *pdev) > -{ > - struct device *dev = &pdev->dev; > - struct rcar_pcie *pcie; > - u32 data; > - int err; > - int (*phy_init_fn)(struct rcar_pcie *); > - struct pci_host_bridge *bridge; > - > - bridge = pci_alloc_host_bridge(sizeof(*pcie)); > - if (!bridge) > - return -ENOMEM; > - > - pcie = pci_host_bridge_priv(bridge); > - > - pcie->dev = dev; > - platform_set_drvdata(pdev, pcie); > - > - err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL); > - if (err) > - goto err_free_bridge; > - > - pm_runtime_enable(pcie->dev); > - err = pm_runtime_get_sync(pcie->dev); > - if (err < 0) { > - dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); > - goto err_pm_disable; > - } > - > - err = rcar_pcie_get_resources(pcie); > - if (err < 0) { > - dev_err(dev, "failed to request resources: %d\n", err); > - goto err_pm_put; > - } > - > - err = clk_prepare_enable(pcie->bus_clk); > - if (err) { > - dev_err(dev, "failed to enable bus clock: %d\n", err); > - goto err_unmap_msi_irqs; > - } > - > - err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node); > - if (err) > - goto err_clk_disable; > - > - phy_init_fn = of_device_get_match_data(dev); > - err = phy_init_fn(pcie); > - if (err) { > - dev_err(dev, "failed to init PCIe PHY\n"); > - goto err_clk_disable; > - } > - > - /* Failure to get a link might just be that no cards are inserted */ > - if (rcar_pcie_hw_init(pcie)) { > - dev_info(dev, "PCIe link down\n"); > - err = -ENODEV; > - goto err_phy_shutdown; > - } > - > - data = rcar_pci_read_reg(pcie, MACSR); > - dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f); > - > - if (IS_ENABLED(CONFIG_PCI_MSI)) { > - err = rcar_pcie_enable_msi(pcie); > - if (err < 0) { > - dev_err(dev, > - "failed to enable MSI support: %d\n", > - err); > - goto err_phy_shutdown; > - } > - } > - > - err = rcar_pcie_enable(pcie); > - if (err) > - goto err_msi_teardown; > - > - return 0; > - > -err_msi_teardown: > - if (IS_ENABLED(CONFIG_PCI_MSI)) > - rcar_pcie_teardown_msi(pcie); > - > -err_phy_shutdown: > - if (pcie->phy) { > - phy_power_off(pcie->phy); > - phy_exit(pcie->phy); > - } > - > -err_clk_disable: > - clk_disable_unprepare(pcie->bus_clk); > - > -err_unmap_msi_irqs: > - irq_dispose_mapping(pcie->msi.irq2); > - irq_dispose_mapping(pcie->msi.irq1); > - > -err_pm_put: > - pm_runtime_put(dev); > - > -err_pm_disable: > - pm_runtime_disable(dev); > - pci_free_resource_list(&pcie->resources); > - > -err_free_bridge: > - pci_free_host_bridge(bridge); > - > - return err; > -} > - > -static int rcar_pcie_resume_noirq(struct device *dev) > -{ > - struct rcar_pcie *pcie = dev_get_drvdata(dev); > - > - if (rcar_pci_read_reg(pcie, PMSR) && > - !(rcar_pci_read_reg(pcie, PCIETCTLR) & DL_DOWN)) > - return 0; > - > - /* Re-establish the PCIe link */ > - rcar_rmw32(pcie, MACCTLR, MACCTLR_RESERVED, 0); > - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR); > - return rcar_pcie_wait_for_dl(pcie); > + /* flush modifications */ > + wmb(); > } > - > -static const struct dev_pm_ops rcar_pcie_pm_ops = { > - .resume_noirq = rcar_pcie_resume_noirq, > -}; > - > -static struct platform_driver rcar_pcie_driver = { > - .driver = { > - .name = "rcar-pcie", > - .of_match_table = rcar_pcie_of_match, > - .pm = &rcar_pcie_pm_ops, > - .suppress_bind_attrs = true, > - }, > - .probe = rcar_pcie_probe, > -}; > -builtin_platform_driver(rcar_pcie_driver); > diff --git a/drivers/pci/controller/pcie-rcar.h b/drivers/pci/controller/pcie-rcar.h > new file mode 100644 > index 000000000000..502621d4e6ac > --- /dev/null > +++ b/drivers/pci/controller/pcie-rcar.h > @@ -0,0 +1,129 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * PCIe driver for Renesas R-Car SoCs > + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd > + * > + * Author: Phil Edworthy <phil.edworthy@renesas.com> > + */ > +#ifndef _PCIE_RCAR_H > +#define _PCIE_RCAR_H > + > +#define PCIECAR 0x000010 > +#define PCIECCTLR 0x000018 > +#define CONFIG_SEND_ENABLE BIT(31) > +#define TYPE0 (0 << 8) > +#define TYPE1 BIT(8) > +#define PCIECDR 0x000020 > +#define PCIEMSR 0x000028 > +#define PCIEINTXR 0x000400 > +#define PCIEPHYSR 0x0007f0 > +#define PHYRDY BIT(0) > +#define PCIEMSITXR 0x000840 > + > +/* Transfer control */ > +#define PCIETCTLR 0x02000 > +#define DL_DOWN BIT(3) > +#define CFINIT BIT(0) > +#define PCIETSTR 0x02004 > +#define DATA_LINK_ACTIVE BIT(0) > +#define PCIEERRFR 0x02020 > +#define UNSUPPORTED_REQUEST BIT(4) > +#define PCIEMSIFR 0x02044 > +#define PCIEMSIALR 0x02048 > +#define MSIFE BIT(0) > +#define PCIEMSIAUR 0x0204c > +#define PCIEMSIIER 0x02050 > + > +/* root port address */ > +#define PCIEPRAR(x) (0x02080 + ((x) * 0x4)) > + > +/* local address reg & mask */ > +#define PCIELAR(x) (0x02200 + ((x) * 0x20)) > +#define PCIELAMR(x) (0x02208 + ((x) * 0x20)) > +#define LAM_PREFETCH BIT(3) > +#define LAM_64BIT BIT(2) > +#define LAR_ENABLE BIT(1) > + > +/* PCIe address reg & mask */ > +#define PCIEPALR(x) (0x03400 + ((x) * 0x20)) > +#define PCIEPAUR(x) (0x03404 + ((x) * 0x20)) > +#define PCIEPAMR(x) (0x03408 + ((x) * 0x20)) > +#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20)) > +#define PAR_ENABLE BIT(31) > +#define IO_SPACE BIT(8) > + > +/* Configuration */ > +#define PCICONF(x) (0x010000 + ((x) * 0x4)) > +#define PMCAP(x) (0x010040 + ((x) * 0x4)) > +#define EXPCAP(x) (0x010070 + ((x) * 0x4)) > +#define VCCAP(x) (0x010100 + ((x) * 0x4)) > + > +/* link layer */ > +#define IDSETR0 0x011000 > +#define DEVICE_ID_SHFIT 16 > +#define IDSETR1 0x011004 > +#define SUBIDSETR 0x011024 > +#define TLCTLR 0x011048 > +#define MACSR 0x011054 > +#define SPCHGFIN BIT(4) > +#define SPCHGFAIL BIT(6) > +#define SPCHGSUC BIT(7) > +#define LINK_SPEED (0xf << 16) > +#define LINK_SPEED_2_5GTS BIT(16) > +#define LINK_SPEED_5_0GTS BIT(17) > +#define MACCTLR 0x011058 > +#define MACCTLR_RESERVED BIT(0) > +#define SPEED_CHANGE BIT(24) > +#define SCRAMBLE_DISABLE BIT(27) > +#define PMSR 0x01105c > +#define MACS2R 0x011078 > +#define MACCGSPSETR 0x011084 > +#define SPCNGRSN BIT(31) > + > +/* R-Car H1 PHY */ > +#define H1_PCIEPHYADRR 0x04000c > +#define WRITE_CMD BIT(16) > +#define PHY_ACK BIT(24) > +#define RATE_POS 12 > +#define LANE_POS 8 > +#define ADR_POS 0 > +#define H1_PCIEPHYDOUTR 0x040014 > + > +/* R-Car Gen2 PHY */ > +#define GEN2_PCIEPHYADDR 0x780 > +#define GEN2_PCIEPHYDATA 0x784 > +#define GEN2_PCIEPHYCTRL 0x78c > + > +#define INT_PCI_MSI_NR 32 > + > +#define RCONF(x) (PCICONF(0) + (x)) > +#define RPMCAP(x) (PMCAP(0) + (x)) > +#define REXPCAP(x) (EXPCAP(0) + (x)) > +#define RVCCAP(x) (VCCAP(0) + (x)) > + > +#define INTDIS_SHIFT BIT(10) > +#define ASTINTX_SHIFT BIT(16) > + > +#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24) > +#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19) > +#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16) > + > +#define RCAR_PCI_MAX_RESOURCES 4 > +#define MAX_NR_INBOUND_MAPS 6 > + > +enum { > + RCAR_PCI_ACCESS_READ, > + RCAR_PCI_ACCESS_WRITE, > +}; > + > +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg); > +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg); > +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data); > +int rcar_pcie_wait_for_phyrdy(void __iomem *base); > +int rcar_pcie_wait_for_dl(void __iomem *base); > +void rcar_pcie_set_outbound(int win, void __iomem *base, > + struct resource *res, bool host); > +void rcar_pcie_set_inbound(void __iomem *base, u64 cpu_addr, u64 pci_addr, > + u64 mask, int idx, bool host); > + > +#endif >
Hi Kishon, On Wed, Nov 27, 2019 at 4:56 AM Kishon Vijay Abraham I <kishon@ti.com> wrote: > > Hi Prabhakar, > > On 07/11/19 1:06 AM, Lad Prabhakar wrote: > > From: "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com> > > > > this patch prepares for adding endpoint support to rcar controller, > > there are no functional changes with this patch, a common file is > > created so that it can be shared with endpoint driver. > > > > Signed-off-by: Lad, Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > > --- > > arch/arm64/configs/defconfig | 2 +- > > arch/arm64/configs/renesas_defconfig | 2 +- > > drivers/pci/controller/Kconfig | 4 +- > > drivers/pci/controller/Makefile | 2 +- > > drivers/pci/controller/pcie-rcar-host.c | 1058 +++++++++++++++++++ > > drivers/pci/controller/pcie-rcar.c | 1231 +---------------------- > > Can you create this patch using "git format-patch -M", so that only whatever > changed appears here. > sure will do that in the next version. Cheers, --Prabhakar > Thanks > Kishon > > > drivers/pci/controller/pcie-rcar.h | 129 +++ > > 7 files changed, 1245 insertions(+), 1183 deletions(-) > > create mode 100644 drivers/pci/controller/pcie-rcar-host.c > > create mode 100644 drivers/pci/controller/pcie-rcar.h > > > > diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig > > index 7d16f10a9251..f67ce0ccea1d 100644 > > --- a/arch/arm64/configs/defconfig > > +++ b/arch/arm64/configs/defconfig > > @@ -186,7 +186,7 @@ CONFIG_HOTPLUG_PCI=y > > CONFIG_HOTPLUG_PCI_ACPI=y > > CONFIG_PCI_AARDVARK=y > > CONFIG_PCI_TEGRA=y > > -CONFIG_PCIE_RCAR=y > > +CONFIG_PCIE_RCAR_HOST=y > > CONFIG_PCI_HOST_GENERIC=y > > CONFIG_PCI_XGENE=y > > CONFIG_PCIE_ALTERA=y > > diff --git a/arch/arm64/configs/renesas_defconfig b/arch/arm64/configs/renesas_defconfig > > index f7411e8807d6..75fc418377c5 100644 > > --- a/arch/arm64/configs/renesas_defconfig > > +++ b/arch/arm64/configs/renesas_defconfig > > @@ -91,7 +91,7 @@ CONFIG_PCIEPORTBUS=y > > CONFIG_HOTPLUG_PCI_PCIE=y > > CONFIG_PCI_IOV=y > > CONFIG_HOTPLUG_PCI=y > > -CONFIG_PCIE_RCAR=y > > +CONFIG_PCIE_RCAR_HOST=y > > CONFIG_PCI_HOST_GENERIC=y > > CONFIG_DEVTMPFS=y > > CONFIG_DEVTMPFS_MOUNT=y > > diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig > > index 70e078238899..01c238e5ea1e 100644 > > --- a/drivers/pci/controller/Kconfig > > +++ b/drivers/pci/controller/Kconfig > > @@ -82,12 +82,12 @@ config PCI_RCAR_GEN2 > > There are 3 internal PCI controllers available with a single > > built-in EHCI/OHCI host controller present on each one. > > > > -config PCIE_RCAR > > +config PCIE_RCAR_HOST > > bool "Renesas R-Car PCIe controller" > > depends on ARCH_RENESAS || COMPILE_TEST > > depends on PCI_MSI_IRQ_DOMAIN > > help > > - Say Y here if you want PCIe controller support on R-Car SoCs. > > + Say Y here if you want PCIe controller support on R-Car SoCs in host mode. > > > > config PCI_HOST_COMMON > > bool > > diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile > > index a2a22c9d91af..3577902a0d40 100644 > > --- a/drivers/pci/controller/Makefile > > +++ b/drivers/pci/controller/Makefile > > @@ -9,7 +9,7 @@ obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o > > obj-$(CONFIG_PCI_AARDVARK) += pci-aardvark.o > > obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o > > obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o > > -obj-$(CONFIG_PCIE_RCAR) += pcie-rcar.o > > +obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar.o pcie-rcar-host.o > > obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o > > obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o > > obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o > > diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c > > new file mode 100644 > > index 000000000000..645ef3e41e27 > > --- /dev/null > > +++ b/drivers/pci/controller/pcie-rcar-host.c > > @@ -0,0 +1,1058 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * PCIe driver for Renesas R-Car SoCs > > + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd > > + * > > + * Based on: > > + * arch/sh/drivers/pci/pcie-sh7786.c > > + * arch/sh/drivers/pci/ops-sh7786.c > > + * Copyright (C) 2009 - 2011 Paul Mundt > > + * > > + * Author: Phil Edworthy <phil.edworthy@renesas.com> > > + */ > > + > > +#include <linux/clk.h> > > +#include <linux/delay.h> > > +#include <linux/msi.h> > > +#include <linux/of_address.h> > > +#include <linux/of_irq.h> > > +#include <linux/of_pci.h> > > +#include <linux/of_platform.h> > > +#include <linux/pci.h> > > +#include <linux/phy/phy.h> > > + > > +#include "pcie-rcar.h" > > + > > +struct rcar_msi { > > + DECLARE_BITMAP(used, INT_PCI_MSI_NR); > > + struct irq_domain *domain; > > + struct msi_controller chip; > > + unsigned long pages; > > + struct mutex lock; /* serializes msi */ > > + int irq1; > > + int irq2; > > +}; > > + > > +static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip) > > +{ > > + return container_of(chip, struct rcar_msi, chip); > > +} > > + > > +/* Structure representing the PCIe interface */ > > +struct rcar_pcie { > > + struct device *dev; > > + struct phy *phy; > > + void __iomem *base; > > + struct list_head resources; > > + int root_bus_nr; > > + struct clk *bus_clk; > > + struct rcar_msi msi; > > +}; > > + > > +static u32 rcar_read_conf(struct rcar_pcie *pcie, int where) > > +{ > > + unsigned int shift = BITS_PER_BYTE * (where & 3); > > + u32 val = rcar_pci_read_reg(pcie->base, where & ~3); > > + > > + return val >> shift; > > +} > > + > > +/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ > > +static int > > +rcar_pcie_config_access(struct rcar_pcie *pcie, > > + unsigned char access_type, struct pci_bus *bus, > > + unsigned int devfn, int where, u32 *data) > > +{ > > + unsigned int dev, func, reg, index; > > + > > + dev = PCI_SLOT(devfn); > > + func = PCI_FUNC(devfn); > > + reg = where & ~3; > > + index = reg / 4; > > + > > + /* > > + * While each channel has its own memory-mapped extended config > > + * space, it's generally only accessible when in endpoint mode. > > + * When in root complex mode, the controller is unable to target > > + * itself with either type 0 or type 1 accesses, and indeed, any > > + * controller initiated target transfer to its own config space > > + * result in a completer abort. > > + * > > + * Each channel effectively only supports a single device, but as > > + * the same channel <-> device access works for any PCI_SLOT() > > + * value, we cheat a bit here and bind the controller's config > > + * space to devfn 0 in order to enable self-enumeration. In this > > + * case the regular ECAR/ECDR path is sidelined and the mangled > > + * config access itself is initiated as an internal bus transaction. > > + */ > > + if (pci_is_root_bus(bus)) { > > + if (dev != 0) > > + return PCIBIOS_DEVICE_NOT_FOUND; > > + > > + if (access_type == RCAR_PCI_ACCESS_READ) { > > + *data = rcar_pci_read_reg(pcie->base, PCICONF(index)); > > + } else { > > + /* Keep an eye out for changes to the root bus number */ > > + if (pci_is_root_bus(bus) && reg == PCI_PRIMARY_BUS) > > + pcie->root_bus_nr = *data & 0xff; > > + > > + rcar_pci_write_reg(pcie->base, *data, PCICONF(index)); > > + } > > + > > + return PCIBIOS_SUCCESSFUL; > > + } > > + > > + if (pcie->root_bus_nr < 0) > > + return PCIBIOS_DEVICE_NOT_FOUND; > > + > > + /* Clear errors */ > > + rcar_pci_write_reg(pcie->base, rcar_pci_read_reg(pcie->base, PCIEERRFR), > > + PCIEERRFR); > > + > > + /* Set the PIO address */ > > + rcar_pci_write_reg(pcie->base, PCIE_CONF_BUS(bus->number) | > > + PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR); > > + > > + /* Enable the configuration access */ > > + if (bus->parent->number == pcie->root_bus_nr) > > + rcar_pci_write_reg(pcie->base, > > + CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR); > > + else > > + rcar_pci_write_reg(pcie->base, > > + CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR); > > + > > + /* Check for errors */ > > + if (rcar_pci_read_reg(pcie->base, PCIEERRFR) & UNSUPPORTED_REQUEST) > > + return PCIBIOS_DEVICE_NOT_FOUND; > > + > > + /* Check for master and target aborts */ > > + if (rcar_read_conf(pcie, RCONF(PCI_STATUS)) & > > + (PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT)) > > + return PCIBIOS_DEVICE_NOT_FOUND; > > + > > + if (access_type == RCAR_PCI_ACCESS_READ) > > + *data = rcar_pci_read_reg(pcie->base, PCIECDR); > > + else > > + rcar_pci_write_reg(pcie->base, *data, PCIECDR); > > + > > + /* Disable the configuration access */ > > + rcar_pci_write_reg(pcie->base, 0, PCIECCTLR); > > + > > + return PCIBIOS_SUCCESSFUL; > > +} > > + > > +static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn, > > + int where, int size, u32 *val) > > +{ > > + struct rcar_pcie *pcie = bus->sysdata; > > + int ret; > > + > > + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, > > + bus, devfn, where, val); > > + if (ret != PCIBIOS_SUCCESSFUL) { > > + *val = 0xffffffff; > > + return ret; > > + } > > + > > + if (size == 1) > > + *val = (*val >> (BITS_PER_BYTE * (where & 3))) & 0xff; > > + else if (size == 2) > > + *val = (*val >> (BITS_PER_BYTE * (where & 2))) & 0xffff; > > + > > + dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", > > + bus->number, devfn, where, size, *val); > > + > > + return ret; > > +} > > + > > +/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ > > +static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn, > > + int where, int size, u32 val) > > +{ > > + struct rcar_pcie *pcie = bus->sysdata; > > + unsigned int shift; > > + u32 data; > > + int ret; > > + > > + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, > > + bus, devfn, where, &data); > > + if (ret != PCIBIOS_SUCCESSFUL) > > + return ret; > > + > > + dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", > > + bus->number, devfn, where, size, val); > > + > > + if (size == 1) { > > + shift = BITS_PER_BYTE * (where & 3); > > + data &= ~(0xff << shift); > > + data |= ((val & 0xff) << shift); > > + } else if (size == 2) { > > + shift = BITS_PER_BYTE * (where & 2); > > + data &= ~(0xffff << shift); > > + data |= ((val & 0xffff) << shift); > > + } else { > > + data = val; > > + } > > + > > + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_WRITE, > > + bus, devfn, where, &data); > > + > > + return ret; > > +} > > + > > +static struct pci_ops rcar_pcie_ops = { > > + .read = rcar_pcie_read_conf, > > + .write = rcar_pcie_write_conf, > > +}; > > + > > +static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) > > +{ > > + struct resource_entry *win; > > + int i = 0; > > + > > + /* Setup PCI resources */ > > + resource_list_for_each_entry(win, &pci->resources) { > > + struct resource *res = win->res; > > + > > + if (!res->flags) > > + continue; > > + > > + switch (resource_type(res)) { > > + case IORESOURCE_IO: > > + case IORESOURCE_MEM: > > + rcar_pcie_set_outbound(i, pci->base, res, true); > > + i++; > > + break; > > + case IORESOURCE_BUS: > > + pci->root_bus_nr = res->start; > > + break; > > + default: > > + continue; > > + } > > + > > + pci_add_resource(resource, res); > > + } > > + > > + return 1; > > +} > > + > > +static void rcar_pcie_force_speedup(struct rcar_pcie *pcie) > > +{ > > + struct device *dev = pcie->dev; > > + unsigned int timeout = 1000; > > + u32 macsr; > > + > > + if ((rcar_pci_read_reg(pcie->base, MACS2R) & LINK_SPEED) != > > + LINK_SPEED_5_0GTS) > > + return; > > + > > + if (rcar_pci_read_reg(pcie->base, MACCTLR) & SPEED_CHANGE) { > > + dev_err(dev, "Speed change already in progress\n"); > > + return; > > + } > > + > > + macsr = rcar_pci_read_reg(pcie->base, MACSR); > > + if ((macsr & LINK_SPEED) == LINK_SPEED_5_0GTS) > > + goto done; > > + > > + /* Set target link speed to 5.0 GT/s */ > > + rcar_rmw32(pcie->base, EXPCAP(12), PCI_EXP_LNKSTA_CLS, > > + PCI_EXP_LNKSTA_CLS_5_0GB); > > + > > + /* Set speed change reason as intentional factor */ > > + rcar_rmw32(pcie->base, MACCGSPSETR, SPCNGRSN, 0); > > + > > + /* Clear SPCHGFIN, SPCHGSUC, and SPCHGFAIL */ > > + if (macsr & (SPCHGFIN | SPCHGSUC | SPCHGFAIL)) > > + rcar_pci_write_reg(pcie->base, macsr, MACSR); > > + > > + /* Start link speed change */ > > + rcar_rmw32(pcie->base, MACCTLR, SPEED_CHANGE, SPEED_CHANGE); > > + > > + while (timeout--) { > > + macsr = rcar_pci_read_reg(pcie->base, MACSR); > > + if (macsr & SPCHGFIN) { > > + /* Clear the interrupt bits */ > > + rcar_pci_write_reg(pcie->base, macsr, MACSR); > > + > > + if (macsr & SPCHGFAIL) > > + dev_err(dev, "Speed change failed\n"); > > + > > + goto done; > > + } > > + > > + usleep_range(1000, 2000); > > + } > > + > > + dev_err(dev, "Speed change timed out\n"); > > + > > +done: > > + dev_info(dev, "Current link speed is %s GT/s\n", > > + (macsr & LINK_SPEED) == LINK_SPEED_5_0GTS ? "5" : "2.5"); > > +} > > + > > +static int rcar_pcie_enable(struct rcar_pcie *pcie) > > +{ > > + struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); > > + struct device *dev = pcie->dev; > > + struct pci_bus *bus, *child; > > + int ret; > > + > > + /* Try setting 5 GT/s link speed */ > > + rcar_pcie_force_speedup(pcie); > > + > > + rcar_pcie_setup(&bridge->windows, pcie); > > + > > + pci_add_flags(PCI_REASSIGN_ALL_BUS); > > + > > + bridge->dev.parent = dev; > > + bridge->sysdata = pcie; > > + bridge->busnr = pcie->root_bus_nr; > > + bridge->ops = &rcar_pcie_ops; > > + bridge->map_irq = of_irq_parse_and_map_pci; > > + bridge->swizzle_irq = pci_common_swizzle; > > + if (IS_ENABLED(CONFIG_PCI_MSI)) > > + bridge->msi = &pcie->msi.chip; > > + > > + ret = pci_scan_root_bus_bridge(bridge); > > + if (ret < 0) > > + return ret; > > + > > + bus = bridge->bus; > > + > > + pci_bus_size_bridges(bus); > > + pci_bus_assign_resources(bus); > > + > > + list_for_each_entry(child, &bus->children, node) > > + pcie_bus_configure_settings(child); > > + > > + pci_bus_add_devices(bus); > > + > > + return 0; > > +} > > + > > +static int phy_wait_for_ack(struct rcar_pcie *pcie) > > +{ > > + struct device *dev = pcie->dev; > > + unsigned int timeout = 100; > > + > > + while (timeout--) { > > + if (rcar_pci_read_reg(pcie->base, H1_PCIEPHYADRR) & PHY_ACK) > > + return 0; > > + > > + usleep_range(90, 110); > > + } > > + > > + dev_err(dev, "Access to PCIe phy timed out\n"); > > + > > + return -ETIMEDOUT; > > +} > > + > > +static void phy_write_reg(struct rcar_pcie *pcie, > > + unsigned int rate, u32 addr, > > + unsigned int lane, u32 data) > > +{ > > + u32 phyaddr; > > + > > + phyaddr = WRITE_CMD | > > + ((rate & 1) << RATE_POS) | > > + ((lane & 0xf) << LANE_POS) | > > + ((addr & 0xff) << ADR_POS); > > + > > + /* Set write data */ > > + rcar_pci_write_reg(pcie->base, data, H1_PCIEPHYDOUTR); > > + rcar_pci_write_reg(pcie->base, phyaddr, H1_PCIEPHYADRR); > > + > > + /* Ignore errors as they will be dealt with if the data link is down */ > > + phy_wait_for_ack(pcie); > > + > > + /* Clear command */ > > + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYDOUTR); > > + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYADRR); > > + > > + /* Ignore errors as they will be dealt with if the data link is down */ > > + phy_wait_for_ack(pcie); > > +} > > + > > +static int rcar_pcie_hw_init(struct rcar_pcie *pcie) > > +{ > > + int err; > > + > > + /* Begin initialization */ > > + rcar_pci_write_reg(pcie->base, 0, PCIETCTLR); > > + > > + /* Set mode */ > > + rcar_pci_write_reg(pcie->base, 1, PCIEMSR); > > + > > + err = rcar_pcie_wait_for_phyrdy(pcie->base); > > + if (err) > > + return err; > > + > > + /* > > + * Initial header for port config space is type 1, set the device > > + * class to match. Hardware takes care of propagating the IDSETR > > + * settings, so there is no need to bother with a quirk. > > + */ > > + rcar_pci_write_reg(pcie->base, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1); > > + > > + /* > > + * Setup Secondary Bus Number & Subordinate Bus Number, even though > > + * they aren't used, to avoid bridge being detected as broken. > > + */ > > + rcar_rmw32(pcie->base, RCONF(PCI_SECONDARY_BUS), 0xff, 1); > > + rcar_rmw32(pcie->base, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1); > > + > > + /* Initialize default capabilities. */ > > + rcar_rmw32(pcie->base, REXPCAP(0), 0xff, PCI_CAP_ID_EXP); > > + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_FLAGS), > > + PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4); > > + rcar_rmw32(pcie->base, RCONF(PCI_HEADER_TYPE), 0x7f, > > + PCI_HEADER_TYPE_BRIDGE); > > + > > + /* Enable data link layer active state reporting */ > > + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC, > > + PCI_EXP_LNKCAP_DLLLARC); > > + > > + /* Write out the physical slot number = 0 */ > > + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0); > > + > > + /* Set the completion timer timeout to the maximum 50ms. */ > > + rcar_rmw32(pcie->base, TLCTLR + 1, 0x3f, 50); > > + > > + /* Terminate list of capabilities (Next Capability Offset=0) */ > > + rcar_rmw32(pcie->base, RVCCAP(0), 0xfff00000, 0); > > + > > + /* Enable MSI */ > > + if (IS_ENABLED(CONFIG_PCI_MSI)) > > + rcar_pci_write_reg(pcie->base, 0x801f0000, PCIEMSITXR); > > + > > + rcar_rmw32(pcie->base, MACCTLR, MACCTLR_RESERVED, 0); > > + > > + /* Finish initialization - establish a PCI Express link */ > > + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR); > > + > > + /* This will timeout if we don't have a link. */ > > + err = rcar_pcie_wait_for_dl(pcie->base); > > + if (err) > > + return err; > > + > > + /* Enable INTx interrupts */ > > + rcar_rmw32(pcie->base, PCIEINTXR, 0, 0xF << 8); > > + > > + /* flush modifications */ > > + wmb(); > > + > > + return 0; > > +} > > + > > +static int rcar_pcie_phy_init_h1(struct rcar_pcie *pcie) > > +{ > > + /* Initialize the phy */ > > + phy_write_reg(pcie, 0, 0x42, 0x1, 0x0EC34191); > > + phy_write_reg(pcie, 1, 0x42, 0x1, 0x0EC34180); > > + phy_write_reg(pcie, 0, 0x43, 0x1, 0x00210188); > > + phy_write_reg(pcie, 1, 0x43, 0x1, 0x00210188); > > + phy_write_reg(pcie, 0, 0x44, 0x1, 0x015C0014); > > + phy_write_reg(pcie, 1, 0x44, 0x1, 0x015C0014); > > + phy_write_reg(pcie, 1, 0x4C, 0x1, 0x786174A0); > > + phy_write_reg(pcie, 1, 0x4D, 0x1, 0x048000BB); > > + phy_write_reg(pcie, 0, 0x51, 0x1, 0x079EC062); > > + phy_write_reg(pcie, 0, 0x52, 0x1, 0x20000000); > > + phy_write_reg(pcie, 1, 0x52, 0x1, 0x20000000); > > + phy_write_reg(pcie, 1, 0x56, 0x1, 0x00003806); > > + > > + phy_write_reg(pcie, 0, 0x60, 0x1, 0x004B03A5); > > + phy_write_reg(pcie, 0, 0x64, 0x1, 0x3F0F1F0F); > > + phy_write_reg(pcie, 0, 0x66, 0x1, 0x00008000); > > + > > + return 0; > > +} > > + > > +static int rcar_pcie_phy_init_gen2(struct rcar_pcie *pcie) > > +{ > > + /* > > + * These settings come from the R-Car Series, 2nd Generation User's > > + * Manual, section 50.3.1 (2) Initialization of the physical layer. > > + */ > > + rcar_pci_write_reg(pcie->base, 0x000f0030, GEN2_PCIEPHYADDR); > > + rcar_pci_write_reg(pcie->base, 0x00381203, GEN2_PCIEPHYDATA); > > + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL); > > + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL); > > + > > + rcar_pci_write_reg(pcie->base, 0x000f0054, GEN2_PCIEPHYADDR); > > + /* The following value is for DC connection, no termination resistor */ > > + rcar_pci_write_reg(pcie->base, 0x13802007, GEN2_PCIEPHYDATA); > > + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL); > > + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL); > > + > > + return 0; > > +} > > + > > +static int rcar_pcie_phy_init_gen3(struct rcar_pcie *pcie) > > +{ > > + int err; > > + > > + err = phy_init(pcie->phy); > > + if (err) > > + return err; > > + > > + err = phy_power_on(pcie->phy); > > + if (err) > > + phy_exit(pcie->phy); > > + > > + return err; > > +} > > + > > +static int rcar_msi_alloc(struct rcar_msi *chip) > > +{ > > + int msi; > > + > > + mutex_lock(&chip->lock); > > + > > + msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR); > > + if (msi < INT_PCI_MSI_NR) > > + set_bit(msi, chip->used); > > + else > > + msi = -ENOSPC; > > + > > + mutex_unlock(&chip->lock); > > + > > + return msi; > > +} > > + > > +static int rcar_msi_alloc_region(struct rcar_msi *chip, int no_irqs) > > +{ > > + int msi; > > + > > + mutex_lock(&chip->lock); > > + msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR, > > + order_base_2(no_irqs)); > > + mutex_unlock(&chip->lock); > > + > > + return msi; > > +} > > + > > +static void rcar_msi_free(struct rcar_msi *chip, unsigned long irq) > > +{ > > + mutex_lock(&chip->lock); > > + clear_bit(irq, chip->used); > > + mutex_unlock(&chip->lock); > > +} > > + > > +static irqreturn_t rcar_pcie_msi_irq(int irq, void *data) > > +{ > > + struct rcar_pcie *pcie = data; > > + struct rcar_msi *msi = &pcie->msi; > > + struct device *dev = pcie->dev; > > + unsigned long reg; > > + > > + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR); > > + > > + /* MSI & INTx share an interrupt - we only handle MSI here */ > > + if (!reg) > > + return IRQ_NONE; > > + > > + while (reg) { > > + unsigned int index = find_first_bit(®, 32); > > + unsigned int msi_irq; > > + > > + /* clear the interrupt */ > > + rcar_pci_write_reg(pcie->base, 1 << index, PCIEMSIFR); > > + > > + msi_irq = irq_find_mapping(msi->domain, index); > > + if (msi_irq) { > > + if (test_bit(index, msi->used)) > > + generic_handle_irq(msi_irq); > > + else > > + dev_info(dev, "unhandled MSI\n"); > > + } else { > > + /* Unknown MSI, just clear it */ > > + dev_dbg(dev, "unexpected MSI\n"); > > + } > > + > > + /* see if there's any more pending in this vector */ > > + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR); > > + } > > + > > + return IRQ_HANDLED; > > +} > > + > > +static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, > > + struct msi_desc *desc) > > +{ > > + struct rcar_msi *msi = to_rcar_msi(chip); > > + struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); > > + struct msi_msg msg; > > + unsigned int irq; > > + int hwirq; > > + > > + hwirq = rcar_msi_alloc(msi); > > + if (hwirq < 0) > > + return hwirq; > > + > > + irq = irq_find_mapping(msi->domain, hwirq); > > + if (!irq) { > > + rcar_msi_free(msi, hwirq); > > + return -EINVAL; > > + } > > + > > + irq_set_msi_desc(irq, desc); > > + > > + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE; > > + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR); > > + msg.data = hwirq; > > + > > + pci_write_msi_msg(irq, &msg); > > + > > + return 0; > > +} > > + > > +static int rcar_msi_setup_irqs(struct msi_controller *chip, > > + struct pci_dev *pdev, int nvec, int type) > > +{ > > + struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); > > + struct rcar_msi *msi = to_rcar_msi(chip); > > + struct msi_desc *desc; > > + struct msi_msg msg; > > + unsigned int irq; > > + int hwirq; > > + int i; > > + > > + /* MSI-X interrupts are not supported */ > > + if (type == PCI_CAP_ID_MSIX) > > + return -EINVAL; > > + > > + WARN_ON(!list_is_singular(&pdev->dev.msi_list)); > > + desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list); > > + > > + hwirq = rcar_msi_alloc_region(msi, nvec); > > + if (hwirq < 0) > > + return -ENOSPC; > > + > > + irq = irq_find_mapping(msi->domain, hwirq); > > + if (!irq) > > + return -ENOSPC; > > + > > + for (i = 0; i < nvec; i++) { > > + /* > > + * irq_create_mapping() called from rcar_pcie_probe() pre- > > + * allocates descs, so there is no need to allocate descs here. > > + * We can therefore assume that if irq_find_mapping() above > > + * returns non-zero, then the descs are also successfully > > + * allocated. > > + */ > > + if (irq_set_msi_desc_off(irq, i, desc)) { > > + /* TODO: clear */ > > + return -EINVAL; > > + } > > + } > > + > > + desc->nvec_used = nvec; > > + desc->msi_attrib.multiple = order_base_2(nvec); > > + > > + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE; > > + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR); > > + msg.data = hwirq; > > + > > + pci_write_msi_msg(irq, &msg); > > + > > + return 0; > > +} > > + > > +static void rcar_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) > > +{ > > + struct irq_data *d = irq_get_irq_data(irq); > > + struct rcar_msi *msi = to_rcar_msi(chip); > > + > > + rcar_msi_free(msi, d->hwirq); > > +} > > + > > +static struct irq_chip rcar_msi_irq_chip = { > > + .name = "R-Car PCIe MSI", > > + .irq_enable = pci_msi_unmask_irq, > > + .irq_disable = pci_msi_mask_irq, > > + .irq_mask = pci_msi_mask_irq, > > + .irq_unmask = pci_msi_unmask_irq, > > +}; > > + > > +static int rcar_msi_map(struct irq_domain *domain, unsigned int irq, > > + irq_hw_number_t hwirq) > > +{ > > + irq_set_chip_and_handler(irq, &rcar_msi_irq_chip, handle_simple_irq); > > + irq_set_chip_data(irq, domain->host_data); > > + > > + return 0; > > +} > > + > > +static const struct irq_domain_ops msi_domain_ops = { > > + .map = rcar_msi_map, > > +}; > > + > > +static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie) > > +{ > > + struct rcar_msi *msi = &pcie->msi; > > + int i, irq; > > + > > + for (i = 0; i < INT_PCI_MSI_NR; i++) { > > + irq = irq_find_mapping(msi->domain, i); > > + if (irq > 0) > > + irq_dispose_mapping(irq); > > + } > > + > > + irq_domain_remove(msi->domain); > > +} > > + > > +static int rcar_pcie_enable_msi(struct rcar_pcie *pcie) > > +{ > > + struct rcar_msi *msi = &pcie->msi; > > + struct device *dev = pcie->dev; > > + phys_addr_t base; > > + int err, i; > > + > > + mutex_init(&msi->lock); > > + > > + msi->chip.dev = dev; > > + msi->chip.setup_irq = rcar_msi_setup_irq; > > + msi->chip.setup_irqs = rcar_msi_setup_irqs; > > + msi->chip.teardown_irq = rcar_msi_teardown_irq; > > + > > + msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR, > > + &msi_domain_ops, &msi->chip); > > + if (!msi->domain) { > > + dev_err(dev, "failed to create IRQ domain\n"); > > + return -ENOMEM; > > + } > > + > > + for (i = 0; i < INT_PCI_MSI_NR; i++) > > + irq_create_mapping(msi->domain, i); > > + > > + /* Two irqs are for MSI, but they are also used for non-MSI irqs */ > > + err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, > > + IRQF_SHARED | IRQF_NO_THREAD, > > + rcar_msi_irq_chip.name, pcie); > > + if (err < 0) { > > + dev_err(dev, "failed to request IRQ: %d\n", err); > > + goto err; > > + } > > + > > + err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, > > + IRQF_SHARED | IRQF_NO_THREAD, > > + rcar_msi_irq_chip.name, pcie); > > + if (err < 0) { > > + dev_err(dev, "failed to request IRQ: %d\n", err); > > + goto err; > > + } > > + > > + /* setup MSI data target */ > > + msi->pages = __get_free_pages(GFP_KERNEL, 0); > > + if (!msi->pages) { > > + err = -ENOMEM; > > + goto err; > > + } > > + base = virt_to_phys((void *)msi->pages); > > + > > + rcar_pci_write_reg(pcie->base, lower_32_bits(base) | MSIFE, PCIEMSIALR); > > + rcar_pci_write_reg(pcie->base, upper_32_bits(base), PCIEMSIAUR); > > + > > + /* enable all MSI interrupts */ > > + rcar_pci_write_reg(pcie->base, 0xffffffff, PCIEMSIIER); > > + > > + return 0; > > + > > +err: > > + rcar_pcie_unmap_msi(pcie); > > + return err; > > +} > > + > > +static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie) > > +{ > > + struct rcar_msi *msi = &pcie->msi; > > + > > + /* Disable all MSI interrupts */ > > + rcar_pci_write_reg(pcie->base, 0, PCIEMSIIER); > > + > > + /* Disable address decoding of the MSI interrupt, MSIFE */ > > + rcar_pci_write_reg(pcie->base, 0, PCIEMSIALR); > > + > > + free_pages(msi->pages, 0); > > + > > + rcar_pcie_unmap_msi(pcie); > > +} > > + > > +static int rcar_pcie_get_resources(struct rcar_pcie *pcie) > > +{ > > + struct device *dev = pcie->dev; > > + struct resource res; > > + int err, i; > > + > > + pcie->phy = devm_phy_optional_get(dev, "pcie"); > > + if (IS_ERR(pcie->phy)) > > + return PTR_ERR(pcie->phy); > > + > > + err = of_address_to_resource(dev->of_node, 0, &res); > > + if (err) > > + return err; > > + > > + pcie->base = devm_ioremap_resource(dev, &res); > > + if (IS_ERR(pcie->base)) > > + return PTR_ERR(pcie->base); > > + > > + pcie->bus_clk = devm_clk_get(dev, "pcie_bus"); > > + if (IS_ERR(pcie->bus_clk)) { > > + dev_err(dev, "cannot get pcie bus clock\n"); > > + return PTR_ERR(pcie->bus_clk); > > + } > > + > > + i = irq_of_parse_and_map(dev->of_node, 0); > > + if (!i) { > > + dev_err(dev, "cannot get platform resources for msi interrupt\n"); > > + err = -ENOENT; > > + goto err_irq1; > > + } > > + pcie->msi.irq1 = i; > > + > > + i = irq_of_parse_and_map(dev->of_node, 1); > > + if (!i) { > > + dev_err(dev, "cannot get platform resources for msi interrupt\n"); > > + err = -ENOENT; > > + goto err_irq2; > > + } > > + pcie->msi.irq2 = i; > > + > > + return 0; > > + > > +err_irq2: > > + irq_dispose_mapping(pcie->msi.irq1); > > +err_irq1: > > + return err; > > +} > > + > > +static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie, > > + struct of_pci_range *range, > > + int *index) > > +{ > > + u64 restype = range->flags; > > + u64 cpu_addr = range->cpu_addr; > > + u64 cpu_end = range->cpu_addr + range->size; > > + u64 pci_addr = range->pci_addr; > > + u32 flags = LAM_64BIT | LAR_ENABLE; > > + u64 mask; > > + u64 size; > > + int idx = *index; > > + > > + if (restype & IORESOURCE_PREFETCH) > > + flags |= LAM_PREFETCH; > > + > > + /* > > + * If the size of the range is larger than the alignment of the start > > + * address, we have to use multiple entries to perform the mapping. > > + */ > > + if (cpu_addr > 0) { > > + unsigned long nr_zeros = __ffs64(cpu_addr); > > + u64 alignment = 1ULL << nr_zeros; > > + > > + size = min(range->size, alignment); > > + } else { > > + size = range->size; > > + } > > + /* Hardware supports max 4GiB inbound region */ > > + size = min(size, 1ULL << 32); > > + > > + mask = roundup_pow_of_two(size) - 1; > > + mask &= ~0xf; > > + > > + while (cpu_addr < cpu_end) { > > + rcar_pcie_set_inbound(pcie->base, cpu_addr, pci_addr, > > + mask | flags, idx, true); > > + pci_addr += size; > > + cpu_addr += size; > > + idx += 2; > > + > > + if (idx > MAX_NR_INBOUND_MAPS) { > > + dev_err(pcie->dev, "Failed to map inbound regions!\n"); > > + return -EINVAL; > > + } > > + } > > + *index = idx; > > + > > + return 0; > > +} > > + > > +static int rcar_pcie_parse_map_dma_ranges(struct rcar_pcie *pcie, > > + struct device_node *np) > > +{ > > + struct of_pci_range_parser parser; > > + struct of_pci_range range; > > + int index = 0; > > + int err; > > + > > + if (of_pci_dma_range_parser_init(&parser, np)) > > + return -EINVAL; > > + > > + /* Get the dma-ranges from DT */ > > + for_each_of_pci_range(&parser, &range) { > > + u64 end = range.cpu_addr + range.size - 1; > > + > > + dev_dbg(pcie->dev, "0x%08x 0x%016llx..0x%016llx -> 0x%016llx\n", > > + range.flags, range.cpu_addr, end, range.pci_addr); > > + > > + err = rcar_pcie_inbound_ranges(pcie, &range, &index); > > + if (err) > > + return err; > > + } > > + > > + return 0; > > +} > > + > > +static const struct of_device_id rcar_pcie_of_match[] = { > > + { .compatible = "renesas,pcie-r8a7779", > > + .data = rcar_pcie_phy_init_h1 }, > > + { .compatible = "renesas,pcie-r8a7790", > > + .data = rcar_pcie_phy_init_gen2 }, > > + { .compatible = "renesas,pcie-r8a7791", > > + .data = rcar_pcie_phy_init_gen2 }, > > + { .compatible = "renesas,pcie-rcar-gen2", > > + .data = rcar_pcie_phy_init_gen2 }, > > + { .compatible = "renesas,pcie-r8a7795", > > + .data = rcar_pcie_phy_init_gen3 }, > > + { .compatible = "renesas,pcie-rcar-gen3", > > + .data = rcar_pcie_phy_init_gen3 }, > > + {}, > > +}; > > + > > +static int rcar_pcie_probe(struct platform_device *pdev) > > +{ > > + int (*phy_init_fn)(struct rcar_pcie *pcie); > > + struct device *dev = &pdev->dev; > > + struct pci_host_bridge *bridge; > > + struct rcar_pcie *pcie; > > + u32 data; > > + int err; > > + > > + bridge = pci_alloc_host_bridge(sizeof(*pcie)); > > + if (!bridge) > > + return -ENOMEM; > > + > > + pcie = pci_host_bridge_priv(bridge); > > + > > + pcie->dev = dev; > > + platform_set_drvdata(pdev, pcie); > > + > > + err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL); > > + if (err) > > + goto err_free_bridge; > > + > > + pm_runtime_enable(pcie->dev); > > + err = pm_runtime_get_sync(pcie->dev); > > + if (err < 0) { > > + dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); > > + goto err_pm_disable; > > + } > > + > > + err = rcar_pcie_get_resources(pcie); > > + if (err < 0) { > > + dev_err(dev, "failed to request resources: %d\n", err); > > + goto err_pm_put; > > + } > > + > > + err = clk_prepare_enable(pcie->bus_clk); > > + if (err) { > > + dev_err(dev, "failed to enable bus clock: %d\n", err); > > + goto err_unmap_msi_irqs; > > + } > > + > > + err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node); > > + if (err) > > + goto err_clk_disable; > > + > > + phy_init_fn = of_device_get_match_data(dev); > > + err = phy_init_fn(pcie); > > + if (err) { > > + dev_err(dev, "failed to init PCIe PHY\n"); > > + goto err_clk_disable; > > + } > > + > > + /* Failure to get a link might just be that no cards are inserted */ > > + if (rcar_pcie_hw_init(pcie)) { > > + dev_info(dev, "PCIe link down\n"); > > + err = -ENODEV; > > + goto err_phy_shutdown; > > + } > > + > > + data = rcar_pci_read_reg(pcie->base, MACSR); > > + dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f); > > + > > + if (IS_ENABLED(CONFIG_PCI_MSI)) { > > + err = rcar_pcie_enable_msi(pcie); > > + if (err < 0) { > > + dev_err(dev, > > + "failed to enable MSI support: %d\n", > > + err); > > + goto err_phy_shutdown; > > + } > > + } > > + > > + err = rcar_pcie_enable(pcie); > > + if (err) > > + goto err_msi_teardown; > > + > > + return 0; > > + > > +err_msi_teardown: > > + if (IS_ENABLED(CONFIG_PCI_MSI)) > > + rcar_pcie_teardown_msi(pcie); > > + > > +err_phy_shutdown: > > + if (pcie->phy) { > > + phy_power_off(pcie->phy); > > + phy_exit(pcie->phy); > > + } > > + > > +err_clk_disable: > > + clk_disable_unprepare(pcie->bus_clk); > > + > > +err_unmap_msi_irqs: > > + irq_dispose_mapping(pcie->msi.irq2); > > + irq_dispose_mapping(pcie->msi.irq1); > > + > > +err_pm_put: > > + pm_runtime_put(dev); > > + > > +err_pm_disable: > > + pm_runtime_disable(dev); > > + pci_free_resource_list(&pcie->resources); > > + > > +err_free_bridge: > > + pci_free_host_bridge(bridge); > > + > > + return err; > > +} > > + > > +static int rcar_pcie_resume_noirq(struct device *dev) > > +{ > > + struct rcar_pcie *pcie = dev_get_drvdata(dev); > > + > > + if (rcar_pci_read_reg(pcie->base, PMSR) && > > + !(rcar_pci_read_reg(pcie->base, PCIETCTLR) & DL_DOWN)) > > + return 0; > > + > > + /* Re-establish the PCIe link */ > > + rcar_rmw32(pcie->base, MACCTLR, MACCTLR_RESERVED, 0); > > + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR); > > + return rcar_pcie_wait_for_dl(pcie->base); > > +} > > + > > +static const struct dev_pm_ops rcar_pcie_pm_ops = { > > + .resume_noirq = rcar_pcie_resume_noirq, > > +}; > > + > > +static struct platform_driver rcar_pcie_driver = { > > + .driver = { > > + .name = "rcar-pcie", > > + .of_match_table = rcar_pcie_of_match, > > + .pm = &rcar_pcie_pm_ops, > > + .suppress_bind_attrs = true, > > + }, > > + .probe = rcar_pcie_probe, > > +}; > > +builtin_platform_driver(rcar_pcie_driver); > > diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c > > index e45bb2a7bfa5..1008ae6a896c 100644 > > --- a/drivers/pci/controller/pcie-rcar.c > > +++ b/drivers/pci/controller/pcie-rcar.c > > @@ -1,7 +1,7 @@ > > // SPDX-License-Identifier: GPL-2.0 > > /* > > * PCIe driver for Renesas R-Car SoCs > > - * Copyright (C) 2014 Renesas Electronics Europe Ltd > > + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd > > * > > * Based on: > > * arch/sh/drivers/pci/pcie-sh7786.c > > @@ -11,534 +11,80 @@ > > * Author: Phil Edworthy <phil.edworthy@renesas.com> > > */ > > > > -#include <linux/bitops.h> > > -#include <linux/clk.h> > > #include <linux/delay.h> > > -#include <linux/interrupt.h> > > -#include <linux/irq.h> > > -#include <linux/irqdomain.h> > > -#include <linux/kernel.h> > > -#include <linux/init.h> > > -#include <linux/msi.h> > > -#include <linux/of_address.h> > > -#include <linux/of_irq.h> > > -#include <linux/of_pci.h> > > -#include <linux/of_platform.h> > > #include <linux/pci.h> > > -#include <linux/phy/phy.h> > > -#include <linux/platform_device.h> > > -#include <linux/pm_runtime.h> > > -#include <linux/slab.h> > > > > -#define PCIECAR 0x000010 > > -#define PCIECCTLR 0x000018 > > -#define CONFIG_SEND_ENABLE BIT(31) > > -#define TYPE0 (0 << 8) > > -#define TYPE1 BIT(8) > > -#define PCIECDR 0x000020 > > -#define PCIEMSR 0x000028 > > -#define PCIEINTXR 0x000400 > > -#define PCIEPHYSR 0x0007f0 > > -#define PHYRDY BIT(0) > > -#define PCIEMSITXR 0x000840 > > +#include "pcie-rcar.h" > > > > -/* Transfer control */ > > -#define PCIETCTLR 0x02000 > > -#define DL_DOWN BIT(3) > > -#define CFINIT BIT(0) > > -#define PCIETSTR 0x02004 > > -#define DATA_LINK_ACTIVE BIT(0) > > -#define PCIEERRFR 0x02020 > > -#define UNSUPPORTED_REQUEST BIT(4) > > -#define PCIEMSIFR 0x02044 > > -#define PCIEMSIALR 0x02048 > > -#define MSIFE BIT(0) > > -#define PCIEMSIAUR 0x0204c > > -#define PCIEMSIIER 0x02050 > > - > > -/* root port address */ > > -#define PCIEPRAR(x) (0x02080 + ((x) * 0x4)) > > - > > -/* local address reg & mask */ > > -#define PCIELAR(x) (0x02200 + ((x) * 0x20)) > > -#define PCIELAMR(x) (0x02208 + ((x) * 0x20)) > > -#define LAM_PREFETCH BIT(3) > > -#define LAM_64BIT BIT(2) > > -#define LAR_ENABLE BIT(1) > > - > > -/* PCIe address reg & mask */ > > -#define PCIEPALR(x) (0x03400 + ((x) * 0x20)) > > -#define PCIEPAUR(x) (0x03404 + ((x) * 0x20)) > > -#define PCIEPAMR(x) (0x03408 + ((x) * 0x20)) > > -#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20)) > > -#define PAR_ENABLE BIT(31) > > -#define IO_SPACE BIT(8) > > - > > -/* Configuration */ > > -#define PCICONF(x) (0x010000 + ((x) * 0x4)) > > -#define PMCAP(x) (0x010040 + ((x) * 0x4)) > > -#define EXPCAP(x) (0x010070 + ((x) * 0x4)) > > -#define VCCAP(x) (0x010100 + ((x) * 0x4)) > > - > > -/* link layer */ > > -#define IDSETR1 0x011004 > > -#define TLCTLR 0x011048 > > -#define MACSR 0x011054 > > -#define SPCHGFIN BIT(4) > > -#define SPCHGFAIL BIT(6) > > -#define SPCHGSUC BIT(7) > > -#define LINK_SPEED (0xf << 16) > > -#define LINK_SPEED_2_5GTS (1 << 16) > > -#define LINK_SPEED_5_0GTS (2 << 16) > > -#define MACCTLR 0x011058 > > -#define MACCTLR_RESERVED BIT(0) > > -#define SPEED_CHANGE BIT(24) > > -#define SCRAMBLE_DISABLE BIT(27) > > -#define PMSR 0x01105c > > -#define MACS2R 0x011078 > > -#define MACCGSPSETR 0x011084 > > -#define SPCNGRSN BIT(31) > > - > > -/* R-Car H1 PHY */ > > -#define H1_PCIEPHYADRR 0x04000c > > -#define WRITE_CMD BIT(16) > > -#define PHY_ACK BIT(24) > > -#define RATE_POS 12 > > -#define LANE_POS 8 > > -#define ADR_POS 0 > > -#define H1_PCIEPHYDOUTR 0x040014 > > - > > -/* R-Car Gen2 PHY */ > > -#define GEN2_PCIEPHYADDR 0x780 > > -#define GEN2_PCIEPHYDATA 0x784 > > -#define GEN2_PCIEPHYCTRL 0x78c > > - > > -#define INT_PCI_MSI_NR 32 > > - > > -#define RCONF(x) (PCICONF(0) + (x)) > > -#define RPMCAP(x) (PMCAP(0) + (x)) > > -#define REXPCAP(x) (EXPCAP(0) + (x)) > > -#define RVCCAP(x) (VCCAP(0) + (x)) > > - > > -#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24) > > -#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19) > > -#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16) > > - > > -#define RCAR_PCI_MAX_RESOURCES 4 > > -#define MAX_NR_INBOUND_MAPS 6 > > - > > -struct rcar_msi { > > - DECLARE_BITMAP(used, INT_PCI_MSI_NR); > > - struct irq_domain *domain; > > - struct msi_controller chip; > > - unsigned long pages; > > - struct mutex lock; > > - int irq1; > > - int irq2; > > -}; > > - > > -static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip) > > -{ > > - return container_of(chip, struct rcar_msi, chip); > > -} > > - > > -/* Structure representing the PCIe interface */ > > -struct rcar_pcie { > > - struct device *dev; > > - struct phy *phy; > > - void __iomem *base; > > - struct list_head resources; > > - int root_bus_nr; > > - struct clk *bus_clk; > > - struct rcar_msi msi; > > -}; > > - > > -static void rcar_pci_write_reg(struct rcar_pcie *pcie, u32 val, > > - unsigned int reg) > > +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg) > > { > > - writel(val, pcie->base + reg); > > + writel(val, base + reg); > > } > > > > -static u32 rcar_pci_read_reg(struct rcar_pcie *pcie, unsigned int reg) > > +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg) > > { > > - return readl(pcie->base + reg); > > + return readl(base + reg); > > } > > > > -enum { > > - RCAR_PCI_ACCESS_READ, > > - RCAR_PCI_ACCESS_WRITE, > > -}; > > - > > -static void rcar_rmw32(struct rcar_pcie *pcie, int where, u32 mask, u32 data) > > +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data) > > { > > unsigned int shift = BITS_PER_BYTE * (where & 3); > > - u32 val = rcar_pci_read_reg(pcie, where & ~3); > > + u32 val = rcar_pci_read_reg(base, where & ~3); > > > > val &= ~(mask << shift); > > val |= data << shift; > > - rcar_pci_write_reg(pcie, val, where & ~3); > > -} > > - > > -static u32 rcar_read_conf(struct rcar_pcie *pcie, int where) > > -{ > > - unsigned int shift = BITS_PER_BYTE * (where & 3); > > - u32 val = rcar_pci_read_reg(pcie, where & ~3); > > - > > - return val >> shift; > > + rcar_pci_write_reg(base, val, where & ~3); > > } > > > > -/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ > > -static int rcar_pcie_config_access(struct rcar_pcie *pcie, > > - unsigned char access_type, struct pci_bus *bus, > > - unsigned int devfn, int where, u32 *data) > > -{ > > - unsigned int dev, func, reg, index; > > - > > - dev = PCI_SLOT(devfn); > > - func = PCI_FUNC(devfn); > > - reg = where & ~3; > > - index = reg / 4; > > - > > - /* > > - * While each channel has its own memory-mapped extended config > > - * space, it's generally only accessible when in endpoint mode. > > - * When in root complex mode, the controller is unable to target > > - * itself with either type 0 or type 1 accesses, and indeed, any > > - * controller initiated target transfer to its own config space > > - * result in a completer abort. > > - * > > - * Each channel effectively only supports a single device, but as > > - * the same channel <-> device access works for any PCI_SLOT() > > - * value, we cheat a bit here and bind the controller's config > > - * space to devfn 0 in order to enable self-enumeration. In this > > - * case the regular ECAR/ECDR path is sidelined and the mangled > > - * config access itself is initiated as an internal bus transaction. > > - */ > > - if (pci_is_root_bus(bus)) { > > - if (dev != 0) > > - return PCIBIOS_DEVICE_NOT_FOUND; > > - > > - if (access_type == RCAR_PCI_ACCESS_READ) { > > - *data = rcar_pci_read_reg(pcie, PCICONF(index)); > > - } else { > > - /* Keep an eye out for changes to the root bus number */ > > - if (pci_is_root_bus(bus) && (reg == PCI_PRIMARY_BUS)) > > - pcie->root_bus_nr = *data & 0xff; > > - > > - rcar_pci_write_reg(pcie, *data, PCICONF(index)); > > - } > > - > > - return PCIBIOS_SUCCESSFUL; > > - } > > - > > - if (pcie->root_bus_nr < 0) > > - return PCIBIOS_DEVICE_NOT_FOUND; > > - > > - /* Clear errors */ > > - rcar_pci_write_reg(pcie, rcar_pci_read_reg(pcie, PCIEERRFR), PCIEERRFR); > > - > > - /* Set the PIO address */ > > - rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | > > - PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR); > > - > > - /* Enable the configuration access */ > > - if (bus->parent->number == pcie->root_bus_nr) > > - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR); > > - else > > - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR); > > - > > - /* Check for errors */ > > - if (rcar_pci_read_reg(pcie, PCIEERRFR) & UNSUPPORTED_REQUEST) > > - return PCIBIOS_DEVICE_NOT_FOUND; > > - > > - /* Check for master and target aborts */ > > - if (rcar_read_conf(pcie, RCONF(PCI_STATUS)) & > > - (PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT)) > > - return PCIBIOS_DEVICE_NOT_FOUND; > > - > > - if (access_type == RCAR_PCI_ACCESS_READ) > > - *data = rcar_pci_read_reg(pcie, PCIECDR); > > - else > > - rcar_pci_write_reg(pcie, *data, PCIECDR); > > - > > - /* Disable the configuration access */ > > - rcar_pci_write_reg(pcie, 0, PCIECCTLR); > > - > > - return PCIBIOS_SUCCESSFUL; > > -} > > - > > -static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn, > > - int where, int size, u32 *val) > > -{ > > - struct rcar_pcie *pcie = bus->sysdata; > > - int ret; > > - > > - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, > > - bus, devfn, where, val); > > - if (ret != PCIBIOS_SUCCESSFUL) { > > - *val = 0xffffffff; > > - return ret; > > - } > > - > > - if (size == 1) > > - *val = (*val >> (BITS_PER_BYTE * (where & 3))) & 0xff; > > - else if (size == 2) > > - *val = (*val >> (BITS_PER_BYTE * (where & 2))) & 0xffff; > > - > > - dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", > > - bus->number, devfn, where, size, *val); > > - > > - return ret; > > -} > > - > > -/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ > > -static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn, > > - int where, int size, u32 val) > > -{ > > - struct rcar_pcie *pcie = bus->sysdata; > > - unsigned int shift; > > - u32 data; > > - int ret; > > - > > - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, > > - bus, devfn, where, &data); > > - if (ret != PCIBIOS_SUCCESSFUL) > > - return ret; > > - > > - dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", > > - bus->number, devfn, where, size, val); > > - > > - if (size == 1) { > > - shift = BITS_PER_BYTE * (where & 3); > > - data &= ~(0xff << shift); > > - data |= ((val & 0xff) << shift); > > - } else if (size == 2) { > > - shift = BITS_PER_BYTE * (where & 2); > > - data &= ~(0xffff << shift); > > - data |= ((val & 0xffff) << shift); > > - } else > > - data = val; > > - > > - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_WRITE, > > - bus, devfn, where, &data); > > - > > - return ret; > > -} > > - > > -static struct pci_ops rcar_pcie_ops = { > > - .read = rcar_pcie_read_conf, > > - .write = rcar_pcie_write_conf, > > -}; > > - > > -static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie, > > - struct resource *res) > > +void rcar_pcie_set_outbound(int win, void __iomem *base, > > + struct resource *res, bool host) > > { > > /* Setup PCIe address space mappings for each resource */ > > - resource_size_t size; > > - resource_size_t res_start; > > - u32 mask; > > - > > - rcar_pci_write_reg(pcie, 0x00000000, PCIEPTCTLR(win)); > > + resource_size_t size = 0; > > + resource_size_t res_start = 0; > > + u32 mask = 0x0; > > > > + rcar_pci_write_reg(base, mask, PCIEPTCTLR(win)); > > /* > > * The PAMR mask is calculated in units of 128Bytes, which > > * keeps things pretty simple. > > */ > > size = resource_size(res); > > - mask = (roundup_pow_of_two(size) / SZ_128) - 1; > > - rcar_pci_write_reg(pcie, mask << 7, PCIEPAMR(win)); > > + if (size > 128) > > + mask = (roundup_pow_of_two(size) / SZ_128) - 1; > > + rcar_pci_write_reg(base, mask << 7, PCIEPAMR(win)); > > > > - if (res->flags & IORESOURCE_IO) > > - res_start = pci_pio_to_address(res->start); > > - else > > + if (!host) { > > res_start = res->start; > > + } else { > > + if (res->flags & IORESOURCE_IO) > > + res_start = pci_pio_to_address(res->start); > > + else > > + res_start = res->start; > > + } > > > > - rcar_pci_write_reg(pcie, upper_32_bits(res_start), PCIEPAUR(win)); > > - rcar_pci_write_reg(pcie, lower_32_bits(res_start) & ~0x7F, > > + rcar_pci_write_reg(base, upper_32_bits(res_start), PCIEPAUR(win)); > > + rcar_pci_write_reg(base, lower_32_bits(res_start) & ~0x7F, > > PCIEPALR(win)); > > > > - /* First resource is for IO */ > > - mask = PAR_ENABLE; > > + mask = 0x0; > > + if (res->start) > > + mask = PAR_ENABLE; > > + > > if (res->flags & IORESOURCE_IO) > > mask |= IO_SPACE; > > > > - rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win)); > > -} > > - > > -static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) > > -{ > > - struct resource_entry *win; > > - int i = 0; > > - > > - /* Setup PCI resources */ > > - resource_list_for_each_entry(win, &pci->resources) { > > - struct resource *res = win->res; > > - > > - if (!res->flags) > > - continue; > > - > > - switch (resource_type(res)) { > > - case IORESOURCE_IO: > > - case IORESOURCE_MEM: > > - rcar_pcie_setup_window(i, pci, res); > > - i++; > > - break; > > - case IORESOURCE_BUS: > > - pci->root_bus_nr = res->start; > > - break; > > - default: > > - continue; > > - } > > - > > - pci_add_resource(resource, res); > > - } > > - > > - return 1; > > -} > > - > > -static void rcar_pcie_force_speedup(struct rcar_pcie *pcie) > > -{ > > - struct device *dev = pcie->dev; > > - unsigned int timeout = 1000; > > - u32 macsr; > > - > > - if ((rcar_pci_read_reg(pcie, MACS2R) & LINK_SPEED) != LINK_SPEED_5_0GTS) > > - return; > > - > > - if (rcar_pci_read_reg(pcie, MACCTLR) & SPEED_CHANGE) { > > - dev_err(dev, "Speed change already in progress\n"); > > - return; > > - } > > - > > - macsr = rcar_pci_read_reg(pcie, MACSR); > > - if ((macsr & LINK_SPEED) == LINK_SPEED_5_0GTS) > > - goto done; > > - > > - /* Set target link speed to 5.0 GT/s */ > > - rcar_rmw32(pcie, EXPCAP(12), PCI_EXP_LNKSTA_CLS, > > - PCI_EXP_LNKSTA_CLS_5_0GB); > > - > > - /* Set speed change reason as intentional factor */ > > - rcar_rmw32(pcie, MACCGSPSETR, SPCNGRSN, 0); > > - > > - /* Clear SPCHGFIN, SPCHGSUC, and SPCHGFAIL */ > > - if (macsr & (SPCHGFIN | SPCHGSUC | SPCHGFAIL)) > > - rcar_pci_write_reg(pcie, macsr, MACSR); > > - > > - /* Start link speed change */ > > - rcar_rmw32(pcie, MACCTLR, SPEED_CHANGE, SPEED_CHANGE); > > - > > - while (timeout--) { > > - macsr = rcar_pci_read_reg(pcie, MACSR); > > - if (macsr & SPCHGFIN) { > > - /* Clear the interrupt bits */ > > - rcar_pci_write_reg(pcie, macsr, MACSR); > > - > > - if (macsr & SPCHGFAIL) > > - dev_err(dev, "Speed change failed\n"); > > - > > - goto done; > > - } > > - > > - msleep(1); > > - } > > - > > - dev_err(dev, "Speed change timed out\n"); > > - > > -done: > > - dev_info(dev, "Current link speed is %s GT/s\n", > > - (macsr & LINK_SPEED) == LINK_SPEED_5_0GTS ? "5" : "2.5"); > > -} > > - > > -static int rcar_pcie_enable(struct rcar_pcie *pcie) > > -{ > > - struct device *dev = pcie->dev; > > - struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); > > - struct pci_bus *bus, *child; > > - int ret; > > - > > - /* Try setting 5 GT/s link speed */ > > - rcar_pcie_force_speedup(pcie); > > - > > - rcar_pcie_setup(&bridge->windows, pcie); > > - > > - pci_add_flags(PCI_REASSIGN_ALL_BUS); > > - > > - bridge->dev.parent = dev; > > - bridge->sysdata = pcie; > > - bridge->busnr = pcie->root_bus_nr; > > - bridge->ops = &rcar_pcie_ops; > > - bridge->map_irq = of_irq_parse_and_map_pci; > > - bridge->swizzle_irq = pci_common_swizzle; > > - if (IS_ENABLED(CONFIG_PCI_MSI)) > > - bridge->msi = &pcie->msi.chip; > > - > > - ret = pci_scan_root_bus_bridge(bridge); > > - if (ret < 0) > > - return ret; > > - > > - bus = bridge->bus; > > - > > - pci_bus_size_bridges(bus); > > - pci_bus_assign_resources(bus); > > - > > - list_for_each_entry(child, &bus->children, node) > > - pcie_bus_configure_settings(child); > > - > > - pci_bus_add_devices(bus); > > - > > - return 0; > > -} > > - > > -static int phy_wait_for_ack(struct rcar_pcie *pcie) > > -{ > > - struct device *dev = pcie->dev; > > - unsigned int timeout = 100; > > - > > - while (timeout--) { > > - if (rcar_pci_read_reg(pcie, H1_PCIEPHYADRR) & PHY_ACK) > > - return 0; > > - > > - udelay(100); > > - } > > - > > - dev_err(dev, "Access to PCIe phy timed out\n"); > > - > > - return -ETIMEDOUT; > > -} > > - > > -static void phy_write_reg(struct rcar_pcie *pcie, > > - unsigned int rate, u32 addr, > > - unsigned int lane, u32 data) > > -{ > > - u32 phyaddr; > > - > > - phyaddr = WRITE_CMD | > > - ((rate & 1) << RATE_POS) | > > - ((lane & 0xf) << LANE_POS) | > > - ((addr & 0xff) << ADR_POS); > > - > > - /* Set write data */ > > - rcar_pci_write_reg(pcie, data, H1_PCIEPHYDOUTR); > > - rcar_pci_write_reg(pcie, phyaddr, H1_PCIEPHYADRR); > > - > > - /* Ignore errors as they will be dealt with if the data link is down */ > > - phy_wait_for_ack(pcie); > > - > > - /* Clear command */ > > - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYDOUTR); > > - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYADRR); > > - > > - /* Ignore errors as they will be dealt with if the data link is down */ > > - phy_wait_for_ack(pcie); > > + rcar_pci_write_reg(base, mask, PCIEPTCTLR(win)); > > + /* flush modifications */ > > + wmb(); > > } > > > > -static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie) > > +int rcar_pcie_wait_for_phyrdy(void __iomem *base) > > { > > unsigned int timeout = 10; > > > > while (timeout--) { > > - if (rcar_pci_read_reg(pcie, PCIEPHYSR) & PHYRDY) > > + if (rcar_pci_read_reg(base, PCIEPHYSR) & PHYRDY) > > return 0; > > > > msleep(5); > > @@ -547,12 +93,12 @@ static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie) > > return -ETIMEDOUT; > > } > > > > -static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie) > > +int rcar_pcie_wait_for_dl(void __iomem *base) > > { > > unsigned int timeout = 10000; > > > > while (timeout--) { > > - if ((rcar_pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE)) > > + if ((rcar_pci_read_reg(base, PCIETSTR) & DATA_LINK_ACTIVE)) > > return 0; > > > > udelay(5); > > @@ -562,698 +108,27 @@ static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie) > > return -ETIMEDOUT; > > } > > > > -static int rcar_pcie_hw_init(struct rcar_pcie *pcie) > > -{ > > - int err; > > - > > - /* Begin initialization */ > > - rcar_pci_write_reg(pcie, 0, PCIETCTLR); > > - > > - /* Set mode */ > > - rcar_pci_write_reg(pcie, 1, PCIEMSR); > > - > > - err = rcar_pcie_wait_for_phyrdy(pcie); > > - if (err) > > - return err; > > - > > - /* > > - * Initial header for port config space is type 1, set the device > > - * class to match. Hardware takes care of propagating the IDSETR > > - * settings, so there is no need to bother with a quirk. > > - */ > > - rcar_pci_write_reg(pcie, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1); > > - > > - /* > > - * Setup Secondary Bus Number & Subordinate Bus Number, even though > > - * they aren't used, to avoid bridge being detected as broken. > > - */ > > - rcar_rmw32(pcie, RCONF(PCI_SECONDARY_BUS), 0xff, 1); > > - rcar_rmw32(pcie, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1); > > - > > - /* Initialize default capabilities. */ > > - rcar_rmw32(pcie, REXPCAP(0), 0xff, PCI_CAP_ID_EXP); > > - rcar_rmw32(pcie, REXPCAP(PCI_EXP_FLAGS), > > - PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4); > > - rcar_rmw32(pcie, RCONF(PCI_HEADER_TYPE), 0x7f, > > - PCI_HEADER_TYPE_BRIDGE); > > - > > - /* Enable data link layer active state reporting */ > > - rcar_rmw32(pcie, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC, > > - PCI_EXP_LNKCAP_DLLLARC); > > - > > - /* Write out the physical slot number = 0 */ > > - rcar_rmw32(pcie, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0); > > - > > - /* Set the completion timer timeout to the maximum 50ms. */ > > - rcar_rmw32(pcie, TLCTLR + 1, 0x3f, 50); > > - > > - /* Terminate list of capabilities (Next Capability Offset=0) */ > > - rcar_rmw32(pcie, RVCCAP(0), 0xfff00000, 0); > > - > > - /* Enable MSI */ > > - if (IS_ENABLED(CONFIG_PCI_MSI)) > > - rcar_pci_write_reg(pcie, 0x801f0000, PCIEMSITXR); > > - > > - rcar_rmw32(pcie, MACCTLR, MACCTLR_RESERVED, 0); > > - > > - /* Finish initialization - establish a PCI Express link */ > > - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR); > > - > > - /* This will timeout if we don't have a link. */ > > - err = rcar_pcie_wait_for_dl(pcie); > > - if (err) > > - return err; > > - > > - /* Enable INTx interrupts */ > > - rcar_rmw32(pcie, PCIEINTXR, 0, 0xF << 8); > > - > > - wmb(); > > - > > - return 0; > > -} > > - > > -static int rcar_pcie_phy_init_h1(struct rcar_pcie *pcie) > > -{ > > - /* Initialize the phy */ > > - phy_write_reg(pcie, 0, 0x42, 0x1, 0x0EC34191); > > - phy_write_reg(pcie, 1, 0x42, 0x1, 0x0EC34180); > > - phy_write_reg(pcie, 0, 0x43, 0x1, 0x00210188); > > - phy_write_reg(pcie, 1, 0x43, 0x1, 0x00210188); > > - phy_write_reg(pcie, 0, 0x44, 0x1, 0x015C0014); > > - phy_write_reg(pcie, 1, 0x44, 0x1, 0x015C0014); > > - phy_write_reg(pcie, 1, 0x4C, 0x1, 0x786174A0); > > - phy_write_reg(pcie, 1, 0x4D, 0x1, 0x048000BB); > > - phy_write_reg(pcie, 0, 0x51, 0x1, 0x079EC062); > > - phy_write_reg(pcie, 0, 0x52, 0x1, 0x20000000); > > - phy_write_reg(pcie, 1, 0x52, 0x1, 0x20000000); > > - phy_write_reg(pcie, 1, 0x56, 0x1, 0x00003806); > > - > > - phy_write_reg(pcie, 0, 0x60, 0x1, 0x004B03A5); > > - phy_write_reg(pcie, 0, 0x64, 0x1, 0x3F0F1F0F); > > - phy_write_reg(pcie, 0, 0x66, 0x1, 0x00008000); > > - > > - return 0; > > -} > > - > > -static int rcar_pcie_phy_init_gen2(struct rcar_pcie *pcie) > > -{ > > - /* > > - * These settings come from the R-Car Series, 2nd Generation User's > > - * Manual, section 50.3.1 (2) Initialization of the physical layer. > > - */ > > - rcar_pci_write_reg(pcie, 0x000f0030, GEN2_PCIEPHYADDR); > > - rcar_pci_write_reg(pcie, 0x00381203, GEN2_PCIEPHYDATA); > > - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); > > - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); > > - > > - rcar_pci_write_reg(pcie, 0x000f0054, GEN2_PCIEPHYADDR); > > - /* The following value is for DC connection, no termination resistor */ > > - rcar_pci_write_reg(pcie, 0x13802007, GEN2_PCIEPHYDATA); > > - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); > > - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); > > - > > - return 0; > > -} > > - > > -static int rcar_pcie_phy_init_gen3(struct rcar_pcie *pcie) > > -{ > > - int err; > > - > > - err = phy_init(pcie->phy); > > - if (err) > > - return err; > > - > > - err = phy_power_on(pcie->phy); > > - if (err) > > - phy_exit(pcie->phy); > > - > > - return err; > > -} > > - > > -static int rcar_msi_alloc(struct rcar_msi *chip) > > -{ > > - int msi; > > - > > - mutex_lock(&chip->lock); > > - > > - msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR); > > - if (msi < INT_PCI_MSI_NR) > > - set_bit(msi, chip->used); > > - else > > - msi = -ENOSPC; > > - > > - mutex_unlock(&chip->lock); > > - > > - return msi; > > -} > > - > > -static int rcar_msi_alloc_region(struct rcar_msi *chip, int no_irqs) > > -{ > > - int msi; > > - > > - mutex_lock(&chip->lock); > > - msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR, > > - order_base_2(no_irqs)); > > - mutex_unlock(&chip->lock); > > - > > - return msi; > > -} > > - > > -static void rcar_msi_free(struct rcar_msi *chip, unsigned long irq) > > -{ > > - mutex_lock(&chip->lock); > > - clear_bit(irq, chip->used); > > - mutex_unlock(&chip->lock); > > -} > > - > > -static irqreturn_t rcar_pcie_msi_irq(int irq, void *data) > > -{ > > - struct rcar_pcie *pcie = data; > > - struct rcar_msi *msi = &pcie->msi; > > - struct device *dev = pcie->dev; > > - unsigned long reg; > > - > > - reg = rcar_pci_read_reg(pcie, PCIEMSIFR); > > - > > - /* MSI & INTx share an interrupt - we only handle MSI here */ > > - if (!reg) > > - return IRQ_NONE; > > - > > - while (reg) { > > - unsigned int index = find_first_bit(®, 32); > > - unsigned int msi_irq; > > - > > - /* clear the interrupt */ > > - rcar_pci_write_reg(pcie, 1 << index, PCIEMSIFR); > > - > > - msi_irq = irq_find_mapping(msi->domain, index); > > - if (msi_irq) { > > - if (test_bit(index, msi->used)) > > - generic_handle_irq(msi_irq); > > - else > > - dev_info(dev, "unhandled MSI\n"); > > - } else { > > - /* Unknown MSI, just clear it */ > > - dev_dbg(dev, "unexpected MSI\n"); > > - } > > - > > - /* see if there's any more pending in this vector */ > > - reg = rcar_pci_read_reg(pcie, PCIEMSIFR); > > - } > > - > > - return IRQ_HANDLED; > > -} > > - > > -static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, > > - struct msi_desc *desc) > > -{ > > - struct rcar_msi *msi = to_rcar_msi(chip); > > - struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); > > - struct msi_msg msg; > > - unsigned int irq; > > - int hwirq; > > - > > - hwirq = rcar_msi_alloc(msi); > > - if (hwirq < 0) > > - return hwirq; > > - > > - irq = irq_find_mapping(msi->domain, hwirq); > > - if (!irq) { > > - rcar_msi_free(msi, hwirq); > > - return -EINVAL; > > - } > > - > > - irq_set_msi_desc(irq, desc); > > - > > - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; > > - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); > > - msg.data = hwirq; > > - > > - pci_write_msi_msg(irq, &msg); > > - > > - return 0; > > -} > > - > > -static int rcar_msi_setup_irqs(struct msi_controller *chip, > > - struct pci_dev *pdev, int nvec, int type) > > -{ > > - struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); > > - struct rcar_msi *msi = to_rcar_msi(chip); > > - struct msi_desc *desc; > > - struct msi_msg msg; > > - unsigned int irq; > > - int hwirq; > > - int i; > > - > > - /* MSI-X interrupts are not supported */ > > - if (type == PCI_CAP_ID_MSIX) > > - return -EINVAL; > > - > > - WARN_ON(!list_is_singular(&pdev->dev.msi_list)); > > - desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list); > > - > > - hwirq = rcar_msi_alloc_region(msi, nvec); > > - if (hwirq < 0) > > - return -ENOSPC; > > - > > - irq = irq_find_mapping(msi->domain, hwirq); > > - if (!irq) > > - return -ENOSPC; > > - > > - for (i = 0; i < nvec; i++) { > > - /* > > - * irq_create_mapping() called from rcar_pcie_probe() pre- > > - * allocates descs, so there is no need to allocate descs here. > > - * We can therefore assume that if irq_find_mapping() above > > - * returns non-zero, then the descs are also successfully > > - * allocated. > > - */ > > - if (irq_set_msi_desc_off(irq, i, desc)) { > > - /* TODO: clear */ > > - return -EINVAL; > > - } > > - } > > - > > - desc->nvec_used = nvec; > > - desc->msi_attrib.multiple = order_base_2(nvec); > > - > > - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; > > - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); > > - msg.data = hwirq; > > - > > - pci_write_msi_msg(irq, &msg); > > - > > - return 0; > > -} > > - > > -static void rcar_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) > > -{ > > - struct rcar_msi *msi = to_rcar_msi(chip); > > - struct irq_data *d = irq_get_irq_data(irq); > > - > > - rcar_msi_free(msi, d->hwirq); > > -} > > - > > -static struct irq_chip rcar_msi_irq_chip = { > > - .name = "R-Car PCIe MSI", > > - .irq_enable = pci_msi_unmask_irq, > > - .irq_disable = pci_msi_mask_irq, > > - .irq_mask = pci_msi_mask_irq, > > - .irq_unmask = pci_msi_unmask_irq, > > -}; > > - > > -static int rcar_msi_map(struct irq_domain *domain, unsigned int irq, > > - irq_hw_number_t hwirq) > > -{ > > - irq_set_chip_and_handler(irq, &rcar_msi_irq_chip, handle_simple_irq); > > - irq_set_chip_data(irq, domain->host_data); > > - > > - return 0; > > -} > > - > > -static const struct irq_domain_ops msi_domain_ops = { > > - .map = rcar_msi_map, > > -}; > > - > > -static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie) > > -{ > > - struct rcar_msi *msi = &pcie->msi; > > - int i, irq; > > - > > - for (i = 0; i < INT_PCI_MSI_NR; i++) { > > - irq = irq_find_mapping(msi->domain, i); > > - if (irq > 0) > > - irq_dispose_mapping(irq); > > - } > > - > > - irq_domain_remove(msi->domain); > > -} > > - > > -static int rcar_pcie_enable_msi(struct rcar_pcie *pcie) > > -{ > > - struct device *dev = pcie->dev; > > - struct rcar_msi *msi = &pcie->msi; > > - phys_addr_t base; > > - int err, i; > > - > > - mutex_init(&msi->lock); > > - > > - msi->chip.dev = dev; > > - msi->chip.setup_irq = rcar_msi_setup_irq; > > - msi->chip.setup_irqs = rcar_msi_setup_irqs; > > - msi->chip.teardown_irq = rcar_msi_teardown_irq; > > - > > - msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR, > > - &msi_domain_ops, &msi->chip); > > - if (!msi->domain) { > > - dev_err(dev, "failed to create IRQ domain\n"); > > - return -ENOMEM; > > - } > > - > > - for (i = 0; i < INT_PCI_MSI_NR; i++) > > - irq_create_mapping(msi->domain, i); > > - > > - /* Two irqs are for MSI, but they are also used for non-MSI irqs */ > > - err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, > > - IRQF_SHARED | IRQF_NO_THREAD, > > - rcar_msi_irq_chip.name, pcie); > > - if (err < 0) { > > - dev_err(dev, "failed to request IRQ: %d\n", err); > > - goto err; > > - } > > - > > - err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, > > - IRQF_SHARED | IRQF_NO_THREAD, > > - rcar_msi_irq_chip.name, pcie); > > - if (err < 0) { > > - dev_err(dev, "failed to request IRQ: %d\n", err); > > - goto err; > > - } > > - > > - /* setup MSI data target */ > > - msi->pages = __get_free_pages(GFP_KERNEL, 0); > > - if (!msi->pages) { > > - err = -ENOMEM; > > - goto err; > > - } > > - base = virt_to_phys((void *)msi->pages); > > - > > - rcar_pci_write_reg(pcie, lower_32_bits(base) | MSIFE, PCIEMSIALR); > > - rcar_pci_write_reg(pcie, upper_32_bits(base), PCIEMSIAUR); > > - > > - /* enable all MSI interrupts */ > > - rcar_pci_write_reg(pcie, 0xffffffff, PCIEMSIIER); > > - > > - return 0; > > - > > -err: > > - rcar_pcie_unmap_msi(pcie); > > - return err; > > -} > > - > > -static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie) > > -{ > > - struct rcar_msi *msi = &pcie->msi; > > - > > - /* Disable all MSI interrupts */ > > - rcar_pci_write_reg(pcie, 0, PCIEMSIIER); > > - > > - /* Disable address decoding of the MSI interrupt, MSIFE */ > > - rcar_pci_write_reg(pcie, 0, PCIEMSIALR); > > - > > - free_pages(msi->pages, 0); > > - > > - rcar_pcie_unmap_msi(pcie); > > -} > > - > > -static int rcar_pcie_get_resources(struct rcar_pcie *pcie) > > -{ > > - struct device *dev = pcie->dev; > > - struct resource res; > > - int err, i; > > - > > - pcie->phy = devm_phy_optional_get(dev, "pcie"); > > - if (IS_ERR(pcie->phy)) > > - return PTR_ERR(pcie->phy); > > - > > - err = of_address_to_resource(dev->of_node, 0, &res); > > - if (err) > > - return err; > > - > > - pcie->base = devm_ioremap_resource(dev, &res); > > - if (IS_ERR(pcie->base)) > > - return PTR_ERR(pcie->base); > > - > > - pcie->bus_clk = devm_clk_get(dev, "pcie_bus"); > > - if (IS_ERR(pcie->bus_clk)) { > > - dev_err(dev, "cannot get pcie bus clock\n"); > > - return PTR_ERR(pcie->bus_clk); > > - } > > - > > - i = irq_of_parse_and_map(dev->of_node, 0); > > - if (!i) { > > - dev_err(dev, "cannot get platform resources for msi interrupt\n"); > > - err = -ENOENT; > > - goto err_irq1; > > - } > > - pcie->msi.irq1 = i; > > - > > - i = irq_of_parse_and_map(dev->of_node, 1); > > - if (!i) { > > - dev_err(dev, "cannot get platform resources for msi interrupt\n"); > > - err = -ENOENT; > > - goto err_irq2; > > - } > > - pcie->msi.irq2 = i; > > - > > - return 0; > > - > > -err_irq2: > > - irq_dispose_mapping(pcie->msi.irq1); > > -err_irq1: > > - return err; > > -} > > - > > -static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie, > > - struct of_pci_range *range, > > - int *index) > > +void rcar_pcie_set_inbound(void __iomem *base, > > + u64 cpu_addr, u64 pci_addr, > > + u64 mask, int idx, bool host) > > { > > - u64 restype = range->flags; > > - u64 cpu_addr = range->cpu_addr; > > - u64 cpu_end = range->cpu_addr + range->size; > > - u64 pci_addr = range->pci_addr; > > - u32 flags = LAM_64BIT | LAR_ENABLE; > > - u64 mask; > > - u64 size; > > - int idx = *index; > > - > > - if (restype & IORESOURCE_PREFETCH) > > - flags |= LAM_PREFETCH; > > - > > /* > > - * If the size of the range is larger than the alignment of the start > > - * address, we have to use multiple entries to perform the mapping. > > - */ > > - if (cpu_addr > 0) { > > - unsigned long nr_zeros = __ffs64(cpu_addr); > > - u64 alignment = 1ULL << nr_zeros; > > - > > - size = min(range->size, alignment); > > - } else { > > - size = range->size; > > - } > > - /* Hardware supports max 4GiB inbound region */ > > - size = min(size, 1ULL << 32); > > - > > - mask = roundup_pow_of_two(size) - 1; > > - mask &= ~0xf; > > - > > - while (cpu_addr < cpu_end) { > > - /* > > - * Set up 64-bit inbound regions as the range parser doesn't > > - * distinguish between 32 and 64-bit types. > > - */ > > - rcar_pci_write_reg(pcie, lower_32_bits(pci_addr), > > + * Set up 64-bit inbound regions as the range parser doesn't > > + * distinguish between 32 and 64-bit types. > > + */ > > + if (host) { > > + rcar_pci_write_reg(base, lower_32_bits(pci_addr), > > PCIEPRAR(idx)); > > - rcar_pci_write_reg(pcie, lower_32_bits(cpu_addr), PCIELAR(idx)); > > - rcar_pci_write_reg(pcie, lower_32_bits(mask) | flags, > > - PCIELAMR(idx)); > > - > > - rcar_pci_write_reg(pcie, upper_32_bits(pci_addr), > > + rcar_pci_write_reg(base, upper_32_bits(pci_addr), > > PCIEPRAR(idx + 1)); > > - rcar_pci_write_reg(pcie, upper_32_bits(cpu_addr), > > - PCIELAR(idx + 1)); > > - rcar_pci_write_reg(pcie, 0, PCIELAMR(idx + 1)); > > - > > - pci_addr += size; > > - cpu_addr += size; > > - idx += 2; > > - > > - if (idx > MAX_NR_INBOUND_MAPS) { > > - dev_err(pcie->dev, "Failed to map inbound regions!\n"); > > - return -EINVAL; > > - } > > } > > - *index = idx; > > - > > - return 0; > > -} > > > > -static int rcar_pcie_parse_map_dma_ranges(struct rcar_pcie *pcie, > > - struct device_node *np) > > -{ > > - struct of_pci_range range; > > - struct of_pci_range_parser parser; > > - int index = 0; > > - int err; > > - > > - if (of_pci_dma_range_parser_init(&parser, np)) > > - return -EINVAL; > > - > > - /* Get the dma-ranges from DT */ > > - for_each_of_pci_range(&parser, &range) { > > - u64 end = range.cpu_addr + range.size - 1; > > + rcar_pci_write_reg(base, lower_32_bits(cpu_addr), PCIELAR(idx)); > > + rcar_pci_write_reg(base, lower_32_bits(mask), PCIELAMR(idx)); > > > > - dev_dbg(pcie->dev, "0x%08x 0x%016llx..0x%016llx -> 0x%016llx\n", > > - range.flags, range.cpu_addr, end, range.pci_addr); > > - > > - err = rcar_pcie_inbound_ranges(pcie, &range, &index); > > - if (err) > > - return err; > > - } > > + rcar_pci_write_reg(base, upper_32_bits(cpu_addr), PCIELAR(idx + 1)); > > + rcar_pci_write_reg(base, 0, PCIELAMR(idx + 1)); > > > > - return 0; > > -} > > - > > -static const struct of_device_id rcar_pcie_of_match[] = { > > - { .compatible = "renesas,pcie-r8a7779", > > - .data = rcar_pcie_phy_init_h1 }, > > - { .compatible = "renesas,pcie-r8a7790", > > - .data = rcar_pcie_phy_init_gen2 }, > > - { .compatible = "renesas,pcie-r8a7791", > > - .data = rcar_pcie_phy_init_gen2 }, > > - { .compatible = "renesas,pcie-rcar-gen2", > > - .data = rcar_pcie_phy_init_gen2 }, > > - { .compatible = "renesas,pcie-r8a7795", > > - .data = rcar_pcie_phy_init_gen3 }, > > - { .compatible = "renesas,pcie-rcar-gen3", > > - .data = rcar_pcie_phy_init_gen3 }, > > - {}, > > -}; > > - > > -static int rcar_pcie_probe(struct platform_device *pdev) > > -{ > > - struct device *dev = &pdev->dev; > > - struct rcar_pcie *pcie; > > - u32 data; > > - int err; > > - int (*phy_init_fn)(struct rcar_pcie *); > > - struct pci_host_bridge *bridge; > > - > > - bridge = pci_alloc_host_bridge(sizeof(*pcie)); > > - if (!bridge) > > - return -ENOMEM; > > - > > - pcie = pci_host_bridge_priv(bridge); > > - > > - pcie->dev = dev; > > - platform_set_drvdata(pdev, pcie); > > - > > - err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL); > > - if (err) > > - goto err_free_bridge; > > - > > - pm_runtime_enable(pcie->dev); > > - err = pm_runtime_get_sync(pcie->dev); > > - if (err < 0) { > > - dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); > > - goto err_pm_disable; > > - } > > - > > - err = rcar_pcie_get_resources(pcie); > > - if (err < 0) { > > - dev_err(dev, "failed to request resources: %d\n", err); > > - goto err_pm_put; > > - } > > - > > - err = clk_prepare_enable(pcie->bus_clk); > > - if (err) { > > - dev_err(dev, "failed to enable bus clock: %d\n", err); > > - goto err_unmap_msi_irqs; > > - } > > - > > - err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node); > > - if (err) > > - goto err_clk_disable; > > - > > - phy_init_fn = of_device_get_match_data(dev); > > - err = phy_init_fn(pcie); > > - if (err) { > > - dev_err(dev, "failed to init PCIe PHY\n"); > > - goto err_clk_disable; > > - } > > - > > - /* Failure to get a link might just be that no cards are inserted */ > > - if (rcar_pcie_hw_init(pcie)) { > > - dev_info(dev, "PCIe link down\n"); > > - err = -ENODEV; > > - goto err_phy_shutdown; > > - } > > - > > - data = rcar_pci_read_reg(pcie, MACSR); > > - dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f); > > - > > - if (IS_ENABLED(CONFIG_PCI_MSI)) { > > - err = rcar_pcie_enable_msi(pcie); > > - if (err < 0) { > > - dev_err(dev, > > - "failed to enable MSI support: %d\n", > > - err); > > - goto err_phy_shutdown; > > - } > > - } > > - > > - err = rcar_pcie_enable(pcie); > > - if (err) > > - goto err_msi_teardown; > > - > > - return 0; > > - > > -err_msi_teardown: > > - if (IS_ENABLED(CONFIG_PCI_MSI)) > > - rcar_pcie_teardown_msi(pcie); > > - > > -err_phy_shutdown: > > - if (pcie->phy) { > > - phy_power_off(pcie->phy); > > - phy_exit(pcie->phy); > > - } > > - > > -err_clk_disable: > > - clk_disable_unprepare(pcie->bus_clk); > > - > > -err_unmap_msi_irqs: > > - irq_dispose_mapping(pcie->msi.irq2); > > - irq_dispose_mapping(pcie->msi.irq1); > > - > > -err_pm_put: > > - pm_runtime_put(dev); > > - > > -err_pm_disable: > > - pm_runtime_disable(dev); > > - pci_free_resource_list(&pcie->resources); > > - > > -err_free_bridge: > > - pci_free_host_bridge(bridge); > > - > > - return err; > > -} > > - > > -static int rcar_pcie_resume_noirq(struct device *dev) > > -{ > > - struct rcar_pcie *pcie = dev_get_drvdata(dev); > > - > > - if (rcar_pci_read_reg(pcie, PMSR) && > > - !(rcar_pci_read_reg(pcie, PCIETCTLR) & DL_DOWN)) > > - return 0; > > - > > - /* Re-establish the PCIe link */ > > - rcar_rmw32(pcie, MACCTLR, MACCTLR_RESERVED, 0); > > - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR); > > - return rcar_pcie_wait_for_dl(pcie); > > + /* flush modifications */ > > + wmb(); > > } > > - > > -static const struct dev_pm_ops rcar_pcie_pm_ops = { > > - .resume_noirq = rcar_pcie_resume_noirq, > > -}; > > - > > -static struct platform_driver rcar_pcie_driver = { > > - .driver = { > > - .name = "rcar-pcie", > > - .of_match_table = rcar_pcie_of_match, > > - .pm = &rcar_pcie_pm_ops, > > - .suppress_bind_attrs = true, > > - }, > > - .probe = rcar_pcie_probe, > > -}; > > -builtin_platform_driver(rcar_pcie_driver); > > diff --git a/drivers/pci/controller/pcie-rcar.h b/drivers/pci/controller/pcie-rcar.h > > new file mode 100644 > > index 000000000000..502621d4e6ac > > --- /dev/null > > +++ b/drivers/pci/controller/pcie-rcar.h > > @@ -0,0 +1,129 @@ > > +/* SPDX-License-Identifier: GPL-2.0 */ > > +/* > > + * PCIe driver for Renesas R-Car SoCs > > + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd > > + * > > + * Author: Phil Edworthy <phil.edworthy@renesas.com> > > + */ > > +#ifndef _PCIE_RCAR_H > > +#define _PCIE_RCAR_H > > + > > +#define PCIECAR 0x000010 > > +#define PCIECCTLR 0x000018 > > +#define CONFIG_SEND_ENABLE BIT(31) > > +#define TYPE0 (0 << 8) > > +#define TYPE1 BIT(8) > > +#define PCIECDR 0x000020 > > +#define PCIEMSR 0x000028 > > +#define PCIEINTXR 0x000400 > > +#define PCIEPHYSR 0x0007f0 > > +#define PHYRDY BIT(0) > > +#define PCIEMSITXR 0x000840 > > + > > +/* Transfer control */ > > +#define PCIETCTLR 0x02000 > > +#define DL_DOWN BIT(3) > > +#define CFINIT BIT(0) > > +#define PCIETSTR 0x02004 > > +#define DATA_LINK_ACTIVE BIT(0) > > +#define PCIEERRFR 0x02020 > > +#define UNSUPPORTED_REQUEST BIT(4) > > +#define PCIEMSIFR 0x02044 > > +#define PCIEMSIALR 0x02048 > > +#define MSIFE BIT(0) > > +#define PCIEMSIAUR 0x0204c > > +#define PCIEMSIIER 0x02050 > > + > > +/* root port address */ > > +#define PCIEPRAR(x) (0x02080 + ((x) * 0x4)) > > + > > +/* local address reg & mask */ > > +#define PCIELAR(x) (0x02200 + ((x) * 0x20)) > > +#define PCIELAMR(x) (0x02208 + ((x) * 0x20)) > > +#define LAM_PREFETCH BIT(3) > > +#define LAM_64BIT BIT(2) > > +#define LAR_ENABLE BIT(1) > > + > > +/* PCIe address reg & mask */ > > +#define PCIEPALR(x) (0x03400 + ((x) * 0x20)) > > +#define PCIEPAUR(x) (0x03404 + ((x) * 0x20)) > > +#define PCIEPAMR(x) (0x03408 + ((x) * 0x20)) > > +#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20)) > > +#define PAR_ENABLE BIT(31) > > +#define IO_SPACE BIT(8) > > + > > +/* Configuration */ > > +#define PCICONF(x) (0x010000 + ((x) * 0x4)) > > +#define PMCAP(x) (0x010040 + ((x) * 0x4)) > > +#define EXPCAP(x) (0x010070 + ((x) * 0x4)) > > +#define VCCAP(x) (0x010100 + ((x) * 0x4)) > > + > > +/* link layer */ > > +#define IDSETR0 0x011000 > > +#define DEVICE_ID_SHFIT 16 > > +#define IDSETR1 0x011004 > > +#define SUBIDSETR 0x011024 > > +#define TLCTLR 0x011048 > > +#define MACSR 0x011054 > > +#define SPCHGFIN BIT(4) > > +#define SPCHGFAIL BIT(6) > > +#define SPCHGSUC BIT(7) > > +#define LINK_SPEED (0xf << 16) > > +#define LINK_SPEED_2_5GTS BIT(16) > > +#define LINK_SPEED_5_0GTS BIT(17) > > +#define MACCTLR 0x011058 > > +#define MACCTLR_RESERVED BIT(0) > > +#define SPEED_CHANGE BIT(24) > > +#define SCRAMBLE_DISABLE BIT(27) > > +#define PMSR 0x01105c > > +#define MACS2R 0x011078 > > +#define MACCGSPSETR 0x011084 > > +#define SPCNGRSN BIT(31) > > + > > +/* R-Car H1 PHY */ > > +#define H1_PCIEPHYADRR 0x04000c > > +#define WRITE_CMD BIT(16) > > +#define PHY_ACK BIT(24) > > +#define RATE_POS 12 > > +#define LANE_POS 8 > > +#define ADR_POS 0 > > +#define H1_PCIEPHYDOUTR 0x040014 > > + > > +/* R-Car Gen2 PHY */ > > +#define GEN2_PCIEPHYADDR 0x780 > > +#define GEN2_PCIEPHYDATA 0x784 > > +#define GEN2_PCIEPHYCTRL 0x78c > > + > > +#define INT_PCI_MSI_NR 32 > > + > > +#define RCONF(x) (PCICONF(0) + (x)) > > +#define RPMCAP(x) (PMCAP(0) + (x)) > > +#define REXPCAP(x) (EXPCAP(0) + (x)) > > +#define RVCCAP(x) (VCCAP(0) + (x)) > > + > > +#define INTDIS_SHIFT BIT(10) > > +#define ASTINTX_SHIFT BIT(16) > > + > > +#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24) > > +#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19) > > +#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16) > > + > > +#define RCAR_PCI_MAX_RESOURCES 4 > > +#define MAX_NR_INBOUND_MAPS 6 > > + > > +enum { > > + RCAR_PCI_ACCESS_READ, > > + RCAR_PCI_ACCESS_WRITE, > > +}; > > + > > +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg); > > +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg); > > +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data); > > +int rcar_pcie_wait_for_phyrdy(void __iomem *base); > > +int rcar_pcie_wait_for_dl(void __iomem *base); > > +void rcar_pcie_set_outbound(int win, void __iomem *base, > > + struct resource *res, bool host); > > +void rcar_pcie_set_inbound(void __iomem *base, u64 cpu_addr, u64 pci_addr, > > + u64 mask, int idx, bool host); > > + > > +#endif > >
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index 7d16f10a9251..f67ce0ccea1d 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -186,7 +186,7 @@ CONFIG_HOTPLUG_PCI=y CONFIG_HOTPLUG_PCI_ACPI=y CONFIG_PCI_AARDVARK=y CONFIG_PCI_TEGRA=y -CONFIG_PCIE_RCAR=y +CONFIG_PCIE_RCAR_HOST=y CONFIG_PCI_HOST_GENERIC=y CONFIG_PCI_XGENE=y CONFIG_PCIE_ALTERA=y diff --git a/arch/arm64/configs/renesas_defconfig b/arch/arm64/configs/renesas_defconfig index f7411e8807d6..75fc418377c5 100644 --- a/arch/arm64/configs/renesas_defconfig +++ b/arch/arm64/configs/renesas_defconfig @@ -91,7 +91,7 @@ CONFIG_PCIEPORTBUS=y CONFIG_HOTPLUG_PCI_PCIE=y CONFIG_PCI_IOV=y CONFIG_HOTPLUG_PCI=y -CONFIG_PCIE_RCAR=y +CONFIG_PCIE_RCAR_HOST=y CONFIG_PCI_HOST_GENERIC=y CONFIG_DEVTMPFS=y CONFIG_DEVTMPFS_MOUNT=y diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig index 70e078238899..01c238e5ea1e 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -82,12 +82,12 @@ config PCI_RCAR_GEN2 There are 3 internal PCI controllers available with a single built-in EHCI/OHCI host controller present on each one. -config PCIE_RCAR +config PCIE_RCAR_HOST bool "Renesas R-Car PCIe controller" depends on ARCH_RENESAS || COMPILE_TEST depends on PCI_MSI_IRQ_DOMAIN help - Say Y here if you want PCIe controller support on R-Car SoCs. + Say Y here if you want PCIe controller support on R-Car SoCs in host mode. config PCI_HOST_COMMON bool diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile index a2a22c9d91af..3577902a0d40 100644 --- a/drivers/pci/controller/Makefile +++ b/drivers/pci/controller/Makefile @@ -9,7 +9,7 @@ obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o obj-$(CONFIG_PCI_AARDVARK) += pci-aardvark.o obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o -obj-$(CONFIG_PCIE_RCAR) += pcie-rcar.o +obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar.o pcie-rcar-host.o obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c new file mode 100644 index 000000000000..645ef3e41e27 --- /dev/null +++ b/drivers/pci/controller/pcie-rcar-host.c @@ -0,0 +1,1058 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PCIe driver for Renesas R-Car SoCs + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd + * + * Based on: + * arch/sh/drivers/pci/pcie-sh7786.c + * arch/sh/drivers/pci/ops-sh7786.c + * Copyright (C) 2009 - 2011 Paul Mundt + * + * Author: Phil Edworthy <phil.edworthy@renesas.com> + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/msi.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_pci.h> +#include <linux/of_platform.h> +#include <linux/pci.h> +#include <linux/phy/phy.h> + +#include "pcie-rcar.h" + +struct rcar_msi { + DECLARE_BITMAP(used, INT_PCI_MSI_NR); + struct irq_domain *domain; + struct msi_controller chip; + unsigned long pages; + struct mutex lock; /* serializes msi */ + int irq1; + int irq2; +}; + +static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip) +{ + return container_of(chip, struct rcar_msi, chip); +} + +/* Structure representing the PCIe interface */ +struct rcar_pcie { + struct device *dev; + struct phy *phy; + void __iomem *base; + struct list_head resources; + int root_bus_nr; + struct clk *bus_clk; + struct rcar_msi msi; +}; + +static u32 rcar_read_conf(struct rcar_pcie *pcie, int where) +{ + unsigned int shift = BITS_PER_BYTE * (where & 3); + u32 val = rcar_pci_read_reg(pcie->base, where & ~3); + + return val >> shift; +} + +/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ +static int +rcar_pcie_config_access(struct rcar_pcie *pcie, + unsigned char access_type, struct pci_bus *bus, + unsigned int devfn, int where, u32 *data) +{ + unsigned int dev, func, reg, index; + + dev = PCI_SLOT(devfn); + func = PCI_FUNC(devfn); + reg = where & ~3; + index = reg / 4; + + /* + * While each channel has its own memory-mapped extended config + * space, it's generally only accessible when in endpoint mode. + * When in root complex mode, the controller is unable to target + * itself with either type 0 or type 1 accesses, and indeed, any + * controller initiated target transfer to its own config space + * result in a completer abort. + * + * Each channel effectively only supports a single device, but as + * the same channel <-> device access works for any PCI_SLOT() + * value, we cheat a bit here and bind the controller's config + * space to devfn 0 in order to enable self-enumeration. In this + * case the regular ECAR/ECDR path is sidelined and the mangled + * config access itself is initiated as an internal bus transaction. + */ + if (pci_is_root_bus(bus)) { + if (dev != 0) + return PCIBIOS_DEVICE_NOT_FOUND; + + if (access_type == RCAR_PCI_ACCESS_READ) { + *data = rcar_pci_read_reg(pcie->base, PCICONF(index)); + } else { + /* Keep an eye out for changes to the root bus number */ + if (pci_is_root_bus(bus) && reg == PCI_PRIMARY_BUS) + pcie->root_bus_nr = *data & 0xff; + + rcar_pci_write_reg(pcie->base, *data, PCICONF(index)); + } + + return PCIBIOS_SUCCESSFUL; + } + + if (pcie->root_bus_nr < 0) + return PCIBIOS_DEVICE_NOT_FOUND; + + /* Clear errors */ + rcar_pci_write_reg(pcie->base, rcar_pci_read_reg(pcie->base, PCIEERRFR), + PCIEERRFR); + + /* Set the PIO address */ + rcar_pci_write_reg(pcie->base, PCIE_CONF_BUS(bus->number) | + PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR); + + /* Enable the configuration access */ + if (bus->parent->number == pcie->root_bus_nr) + rcar_pci_write_reg(pcie->base, + CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR); + else + rcar_pci_write_reg(pcie->base, + CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR); + + /* Check for errors */ + if (rcar_pci_read_reg(pcie->base, PCIEERRFR) & UNSUPPORTED_REQUEST) + return PCIBIOS_DEVICE_NOT_FOUND; + + /* Check for master and target aborts */ + if (rcar_read_conf(pcie, RCONF(PCI_STATUS)) & + (PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT)) + return PCIBIOS_DEVICE_NOT_FOUND; + + if (access_type == RCAR_PCI_ACCESS_READ) + *data = rcar_pci_read_reg(pcie->base, PCIECDR); + else + rcar_pci_write_reg(pcie->base, *data, PCIECDR); + + /* Disable the configuration access */ + rcar_pci_write_reg(pcie->base, 0, PCIECCTLR); + + return PCIBIOS_SUCCESSFUL; +} + +static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) +{ + struct rcar_pcie *pcie = bus->sysdata; + int ret; + + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, + bus, devfn, where, val); + if (ret != PCIBIOS_SUCCESSFUL) { + *val = 0xffffffff; + return ret; + } + + if (size == 1) + *val = (*val >> (BITS_PER_BYTE * (where & 3))) & 0xff; + else if (size == 2) + *val = (*val >> (BITS_PER_BYTE * (where & 2))) & 0xffff; + + dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", + bus->number, devfn, where, size, *val); + + return ret; +} + +/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ +static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) +{ + struct rcar_pcie *pcie = bus->sysdata; + unsigned int shift; + u32 data; + int ret; + + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, + bus, devfn, where, &data); + if (ret != PCIBIOS_SUCCESSFUL) + return ret; + + dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", + bus->number, devfn, where, size, val); + + if (size == 1) { + shift = BITS_PER_BYTE * (where & 3); + data &= ~(0xff << shift); + data |= ((val & 0xff) << shift); + } else if (size == 2) { + shift = BITS_PER_BYTE * (where & 2); + data &= ~(0xffff << shift); + data |= ((val & 0xffff) << shift); + } else { + data = val; + } + + ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_WRITE, + bus, devfn, where, &data); + + return ret; +} + +static struct pci_ops rcar_pcie_ops = { + .read = rcar_pcie_read_conf, + .write = rcar_pcie_write_conf, +}; + +static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) +{ + struct resource_entry *win; + int i = 0; + + /* Setup PCI resources */ + resource_list_for_each_entry(win, &pci->resources) { + struct resource *res = win->res; + + if (!res->flags) + continue; + + switch (resource_type(res)) { + case IORESOURCE_IO: + case IORESOURCE_MEM: + rcar_pcie_set_outbound(i, pci->base, res, true); + i++; + break; + case IORESOURCE_BUS: + pci->root_bus_nr = res->start; + break; + default: + continue; + } + + pci_add_resource(resource, res); + } + + return 1; +} + +static void rcar_pcie_force_speedup(struct rcar_pcie *pcie) +{ + struct device *dev = pcie->dev; + unsigned int timeout = 1000; + u32 macsr; + + if ((rcar_pci_read_reg(pcie->base, MACS2R) & LINK_SPEED) != + LINK_SPEED_5_0GTS) + return; + + if (rcar_pci_read_reg(pcie->base, MACCTLR) & SPEED_CHANGE) { + dev_err(dev, "Speed change already in progress\n"); + return; + } + + macsr = rcar_pci_read_reg(pcie->base, MACSR); + if ((macsr & LINK_SPEED) == LINK_SPEED_5_0GTS) + goto done; + + /* Set target link speed to 5.0 GT/s */ + rcar_rmw32(pcie->base, EXPCAP(12), PCI_EXP_LNKSTA_CLS, + PCI_EXP_LNKSTA_CLS_5_0GB); + + /* Set speed change reason as intentional factor */ + rcar_rmw32(pcie->base, MACCGSPSETR, SPCNGRSN, 0); + + /* Clear SPCHGFIN, SPCHGSUC, and SPCHGFAIL */ + if (macsr & (SPCHGFIN | SPCHGSUC | SPCHGFAIL)) + rcar_pci_write_reg(pcie->base, macsr, MACSR); + + /* Start link speed change */ + rcar_rmw32(pcie->base, MACCTLR, SPEED_CHANGE, SPEED_CHANGE); + + while (timeout--) { + macsr = rcar_pci_read_reg(pcie->base, MACSR); + if (macsr & SPCHGFIN) { + /* Clear the interrupt bits */ + rcar_pci_write_reg(pcie->base, macsr, MACSR); + + if (macsr & SPCHGFAIL) + dev_err(dev, "Speed change failed\n"); + + goto done; + } + + usleep_range(1000, 2000); + } + + dev_err(dev, "Speed change timed out\n"); + +done: + dev_info(dev, "Current link speed is %s GT/s\n", + (macsr & LINK_SPEED) == LINK_SPEED_5_0GTS ? "5" : "2.5"); +} + +static int rcar_pcie_enable(struct rcar_pcie *pcie) +{ + struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); + struct device *dev = pcie->dev; + struct pci_bus *bus, *child; + int ret; + + /* Try setting 5 GT/s link speed */ + rcar_pcie_force_speedup(pcie); + + rcar_pcie_setup(&bridge->windows, pcie); + + pci_add_flags(PCI_REASSIGN_ALL_BUS); + + bridge->dev.parent = dev; + bridge->sysdata = pcie; + bridge->busnr = pcie->root_bus_nr; + bridge->ops = &rcar_pcie_ops; + bridge->map_irq = of_irq_parse_and_map_pci; + bridge->swizzle_irq = pci_common_swizzle; + if (IS_ENABLED(CONFIG_PCI_MSI)) + bridge->msi = &pcie->msi.chip; + + ret = pci_scan_root_bus_bridge(bridge); + if (ret < 0) + return ret; + + bus = bridge->bus; + + pci_bus_size_bridges(bus); + pci_bus_assign_resources(bus); + + list_for_each_entry(child, &bus->children, node) + pcie_bus_configure_settings(child); + + pci_bus_add_devices(bus); + + return 0; +} + +static int phy_wait_for_ack(struct rcar_pcie *pcie) +{ + struct device *dev = pcie->dev; + unsigned int timeout = 100; + + while (timeout--) { + if (rcar_pci_read_reg(pcie->base, H1_PCIEPHYADRR) & PHY_ACK) + return 0; + + usleep_range(90, 110); + } + + dev_err(dev, "Access to PCIe phy timed out\n"); + + return -ETIMEDOUT; +} + +static void phy_write_reg(struct rcar_pcie *pcie, + unsigned int rate, u32 addr, + unsigned int lane, u32 data) +{ + u32 phyaddr; + + phyaddr = WRITE_CMD | + ((rate & 1) << RATE_POS) | + ((lane & 0xf) << LANE_POS) | + ((addr & 0xff) << ADR_POS); + + /* Set write data */ + rcar_pci_write_reg(pcie->base, data, H1_PCIEPHYDOUTR); + rcar_pci_write_reg(pcie->base, phyaddr, H1_PCIEPHYADRR); + + /* Ignore errors as they will be dealt with if the data link is down */ + phy_wait_for_ack(pcie); + + /* Clear command */ + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYDOUTR); + rcar_pci_write_reg(pcie->base, 0, H1_PCIEPHYADRR); + + /* Ignore errors as they will be dealt with if the data link is down */ + phy_wait_for_ack(pcie); +} + +static int rcar_pcie_hw_init(struct rcar_pcie *pcie) +{ + int err; + + /* Begin initialization */ + rcar_pci_write_reg(pcie->base, 0, PCIETCTLR); + + /* Set mode */ + rcar_pci_write_reg(pcie->base, 1, PCIEMSR); + + err = rcar_pcie_wait_for_phyrdy(pcie->base); + if (err) + return err; + + /* + * Initial header for port config space is type 1, set the device + * class to match. Hardware takes care of propagating the IDSETR + * settings, so there is no need to bother with a quirk. + */ + rcar_pci_write_reg(pcie->base, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1); + + /* + * Setup Secondary Bus Number & Subordinate Bus Number, even though + * they aren't used, to avoid bridge being detected as broken. + */ + rcar_rmw32(pcie->base, RCONF(PCI_SECONDARY_BUS), 0xff, 1); + rcar_rmw32(pcie->base, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1); + + /* Initialize default capabilities. */ + rcar_rmw32(pcie->base, REXPCAP(0), 0xff, PCI_CAP_ID_EXP); + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_FLAGS), + PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4); + rcar_rmw32(pcie->base, RCONF(PCI_HEADER_TYPE), 0x7f, + PCI_HEADER_TYPE_BRIDGE); + + /* Enable data link layer active state reporting */ + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC, + PCI_EXP_LNKCAP_DLLLARC); + + /* Write out the physical slot number = 0 */ + rcar_rmw32(pcie->base, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0); + + /* Set the completion timer timeout to the maximum 50ms. */ + rcar_rmw32(pcie->base, TLCTLR + 1, 0x3f, 50); + + /* Terminate list of capabilities (Next Capability Offset=0) */ + rcar_rmw32(pcie->base, RVCCAP(0), 0xfff00000, 0); + + /* Enable MSI */ + if (IS_ENABLED(CONFIG_PCI_MSI)) + rcar_pci_write_reg(pcie->base, 0x801f0000, PCIEMSITXR); + + rcar_rmw32(pcie->base, MACCTLR, MACCTLR_RESERVED, 0); + + /* Finish initialization - establish a PCI Express link */ + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR); + + /* This will timeout if we don't have a link. */ + err = rcar_pcie_wait_for_dl(pcie->base); + if (err) + return err; + + /* Enable INTx interrupts */ + rcar_rmw32(pcie->base, PCIEINTXR, 0, 0xF << 8); + + /* flush modifications */ + wmb(); + + return 0; +} + +static int rcar_pcie_phy_init_h1(struct rcar_pcie *pcie) +{ + /* Initialize the phy */ + phy_write_reg(pcie, 0, 0x42, 0x1, 0x0EC34191); + phy_write_reg(pcie, 1, 0x42, 0x1, 0x0EC34180); + phy_write_reg(pcie, 0, 0x43, 0x1, 0x00210188); + phy_write_reg(pcie, 1, 0x43, 0x1, 0x00210188); + phy_write_reg(pcie, 0, 0x44, 0x1, 0x015C0014); + phy_write_reg(pcie, 1, 0x44, 0x1, 0x015C0014); + phy_write_reg(pcie, 1, 0x4C, 0x1, 0x786174A0); + phy_write_reg(pcie, 1, 0x4D, 0x1, 0x048000BB); + phy_write_reg(pcie, 0, 0x51, 0x1, 0x079EC062); + phy_write_reg(pcie, 0, 0x52, 0x1, 0x20000000); + phy_write_reg(pcie, 1, 0x52, 0x1, 0x20000000); + phy_write_reg(pcie, 1, 0x56, 0x1, 0x00003806); + + phy_write_reg(pcie, 0, 0x60, 0x1, 0x004B03A5); + phy_write_reg(pcie, 0, 0x64, 0x1, 0x3F0F1F0F); + phy_write_reg(pcie, 0, 0x66, 0x1, 0x00008000); + + return 0; +} + +static int rcar_pcie_phy_init_gen2(struct rcar_pcie *pcie) +{ + /* + * These settings come from the R-Car Series, 2nd Generation User's + * Manual, section 50.3.1 (2) Initialization of the physical layer. + */ + rcar_pci_write_reg(pcie->base, 0x000f0030, GEN2_PCIEPHYADDR); + rcar_pci_write_reg(pcie->base, 0x00381203, GEN2_PCIEPHYDATA); + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL); + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL); + + rcar_pci_write_reg(pcie->base, 0x000f0054, GEN2_PCIEPHYADDR); + /* The following value is for DC connection, no termination resistor */ + rcar_pci_write_reg(pcie->base, 0x13802007, GEN2_PCIEPHYDATA); + rcar_pci_write_reg(pcie->base, 0x00000001, GEN2_PCIEPHYCTRL); + rcar_pci_write_reg(pcie->base, 0x00000006, GEN2_PCIEPHYCTRL); + + return 0; +} + +static int rcar_pcie_phy_init_gen3(struct rcar_pcie *pcie) +{ + int err; + + err = phy_init(pcie->phy); + if (err) + return err; + + err = phy_power_on(pcie->phy); + if (err) + phy_exit(pcie->phy); + + return err; +} + +static int rcar_msi_alloc(struct rcar_msi *chip) +{ + int msi; + + mutex_lock(&chip->lock); + + msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR); + if (msi < INT_PCI_MSI_NR) + set_bit(msi, chip->used); + else + msi = -ENOSPC; + + mutex_unlock(&chip->lock); + + return msi; +} + +static int rcar_msi_alloc_region(struct rcar_msi *chip, int no_irqs) +{ + int msi; + + mutex_lock(&chip->lock); + msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR, + order_base_2(no_irqs)); + mutex_unlock(&chip->lock); + + return msi; +} + +static void rcar_msi_free(struct rcar_msi *chip, unsigned long irq) +{ + mutex_lock(&chip->lock); + clear_bit(irq, chip->used); + mutex_unlock(&chip->lock); +} + +static irqreturn_t rcar_pcie_msi_irq(int irq, void *data) +{ + struct rcar_pcie *pcie = data; + struct rcar_msi *msi = &pcie->msi; + struct device *dev = pcie->dev; + unsigned long reg; + + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR); + + /* MSI & INTx share an interrupt - we only handle MSI here */ + if (!reg) + return IRQ_NONE; + + while (reg) { + unsigned int index = find_first_bit(®, 32); + unsigned int msi_irq; + + /* clear the interrupt */ + rcar_pci_write_reg(pcie->base, 1 << index, PCIEMSIFR); + + msi_irq = irq_find_mapping(msi->domain, index); + if (msi_irq) { + if (test_bit(index, msi->used)) + generic_handle_irq(msi_irq); + else + dev_info(dev, "unhandled MSI\n"); + } else { + /* Unknown MSI, just clear it */ + dev_dbg(dev, "unexpected MSI\n"); + } + + /* see if there's any more pending in this vector */ + reg = rcar_pci_read_reg(pcie->base, PCIEMSIFR); + } + + return IRQ_HANDLED; +} + +static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, + struct msi_desc *desc) +{ + struct rcar_msi *msi = to_rcar_msi(chip); + struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); + struct msi_msg msg; + unsigned int irq; + int hwirq; + + hwirq = rcar_msi_alloc(msi); + if (hwirq < 0) + return hwirq; + + irq = irq_find_mapping(msi->domain, hwirq); + if (!irq) { + rcar_msi_free(msi, hwirq); + return -EINVAL; + } + + irq_set_msi_desc(irq, desc); + + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE; + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR); + msg.data = hwirq; + + pci_write_msi_msg(irq, &msg); + + return 0; +} + +static int rcar_msi_setup_irqs(struct msi_controller *chip, + struct pci_dev *pdev, int nvec, int type) +{ + struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); + struct rcar_msi *msi = to_rcar_msi(chip); + struct msi_desc *desc; + struct msi_msg msg; + unsigned int irq; + int hwirq; + int i; + + /* MSI-X interrupts are not supported */ + if (type == PCI_CAP_ID_MSIX) + return -EINVAL; + + WARN_ON(!list_is_singular(&pdev->dev.msi_list)); + desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list); + + hwirq = rcar_msi_alloc_region(msi, nvec); + if (hwirq < 0) + return -ENOSPC; + + irq = irq_find_mapping(msi->domain, hwirq); + if (!irq) + return -ENOSPC; + + for (i = 0; i < nvec; i++) { + /* + * irq_create_mapping() called from rcar_pcie_probe() pre- + * allocates descs, so there is no need to allocate descs here. + * We can therefore assume that if irq_find_mapping() above + * returns non-zero, then the descs are also successfully + * allocated. + */ + if (irq_set_msi_desc_off(irq, i, desc)) { + /* TODO: clear */ + return -EINVAL; + } + } + + desc->nvec_used = nvec; + desc->msi_attrib.multiple = order_base_2(nvec); + + msg.address_lo = rcar_pci_read_reg(pcie->base, PCIEMSIALR) & ~MSIFE; + msg.address_hi = rcar_pci_read_reg(pcie->base, PCIEMSIAUR); + msg.data = hwirq; + + pci_write_msi_msg(irq, &msg); + + return 0; +} + +static void rcar_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) +{ + struct irq_data *d = irq_get_irq_data(irq); + struct rcar_msi *msi = to_rcar_msi(chip); + + rcar_msi_free(msi, d->hwirq); +} + +static struct irq_chip rcar_msi_irq_chip = { + .name = "R-Car PCIe MSI", + .irq_enable = pci_msi_unmask_irq, + .irq_disable = pci_msi_mask_irq, + .irq_mask = pci_msi_mask_irq, + .irq_unmask = pci_msi_unmask_irq, +}; + +static int rcar_msi_map(struct irq_domain *domain, unsigned int irq, + irq_hw_number_t hwirq) +{ + irq_set_chip_and_handler(irq, &rcar_msi_irq_chip, handle_simple_irq); + irq_set_chip_data(irq, domain->host_data); + + return 0; +} + +static const struct irq_domain_ops msi_domain_ops = { + .map = rcar_msi_map, +}; + +static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie) +{ + struct rcar_msi *msi = &pcie->msi; + int i, irq; + + for (i = 0; i < INT_PCI_MSI_NR; i++) { + irq = irq_find_mapping(msi->domain, i); + if (irq > 0) + irq_dispose_mapping(irq); + } + + irq_domain_remove(msi->domain); +} + +static int rcar_pcie_enable_msi(struct rcar_pcie *pcie) +{ + struct rcar_msi *msi = &pcie->msi; + struct device *dev = pcie->dev; + phys_addr_t base; + int err, i; + + mutex_init(&msi->lock); + + msi->chip.dev = dev; + msi->chip.setup_irq = rcar_msi_setup_irq; + msi->chip.setup_irqs = rcar_msi_setup_irqs; + msi->chip.teardown_irq = rcar_msi_teardown_irq; + + msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR, + &msi_domain_ops, &msi->chip); + if (!msi->domain) { + dev_err(dev, "failed to create IRQ domain\n"); + return -ENOMEM; + } + + for (i = 0; i < INT_PCI_MSI_NR; i++) + irq_create_mapping(msi->domain, i); + + /* Two irqs are for MSI, but they are also used for non-MSI irqs */ + err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, + IRQF_SHARED | IRQF_NO_THREAD, + rcar_msi_irq_chip.name, pcie); + if (err < 0) { + dev_err(dev, "failed to request IRQ: %d\n", err); + goto err; + } + + err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, + IRQF_SHARED | IRQF_NO_THREAD, + rcar_msi_irq_chip.name, pcie); + if (err < 0) { + dev_err(dev, "failed to request IRQ: %d\n", err); + goto err; + } + + /* setup MSI data target */ + msi->pages = __get_free_pages(GFP_KERNEL, 0); + if (!msi->pages) { + err = -ENOMEM; + goto err; + } + base = virt_to_phys((void *)msi->pages); + + rcar_pci_write_reg(pcie->base, lower_32_bits(base) | MSIFE, PCIEMSIALR); + rcar_pci_write_reg(pcie->base, upper_32_bits(base), PCIEMSIAUR); + + /* enable all MSI interrupts */ + rcar_pci_write_reg(pcie->base, 0xffffffff, PCIEMSIIER); + + return 0; + +err: + rcar_pcie_unmap_msi(pcie); + return err; +} + +static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie) +{ + struct rcar_msi *msi = &pcie->msi; + + /* Disable all MSI interrupts */ + rcar_pci_write_reg(pcie->base, 0, PCIEMSIIER); + + /* Disable address decoding of the MSI interrupt, MSIFE */ + rcar_pci_write_reg(pcie->base, 0, PCIEMSIALR); + + free_pages(msi->pages, 0); + + rcar_pcie_unmap_msi(pcie); +} + +static int rcar_pcie_get_resources(struct rcar_pcie *pcie) +{ + struct device *dev = pcie->dev; + struct resource res; + int err, i; + + pcie->phy = devm_phy_optional_get(dev, "pcie"); + if (IS_ERR(pcie->phy)) + return PTR_ERR(pcie->phy); + + err = of_address_to_resource(dev->of_node, 0, &res); + if (err) + return err; + + pcie->base = devm_ioremap_resource(dev, &res); + if (IS_ERR(pcie->base)) + return PTR_ERR(pcie->base); + + pcie->bus_clk = devm_clk_get(dev, "pcie_bus"); + if (IS_ERR(pcie->bus_clk)) { + dev_err(dev, "cannot get pcie bus clock\n"); + return PTR_ERR(pcie->bus_clk); + } + + i = irq_of_parse_and_map(dev->of_node, 0); + if (!i) { + dev_err(dev, "cannot get platform resources for msi interrupt\n"); + err = -ENOENT; + goto err_irq1; + } + pcie->msi.irq1 = i; + + i = irq_of_parse_and_map(dev->of_node, 1); + if (!i) { + dev_err(dev, "cannot get platform resources for msi interrupt\n"); + err = -ENOENT; + goto err_irq2; + } + pcie->msi.irq2 = i; + + return 0; + +err_irq2: + irq_dispose_mapping(pcie->msi.irq1); +err_irq1: + return err; +} + +static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie, + struct of_pci_range *range, + int *index) +{ + u64 restype = range->flags; + u64 cpu_addr = range->cpu_addr; + u64 cpu_end = range->cpu_addr + range->size; + u64 pci_addr = range->pci_addr; + u32 flags = LAM_64BIT | LAR_ENABLE; + u64 mask; + u64 size; + int idx = *index; + + if (restype & IORESOURCE_PREFETCH) + flags |= LAM_PREFETCH; + + /* + * If the size of the range is larger than the alignment of the start + * address, we have to use multiple entries to perform the mapping. + */ + if (cpu_addr > 0) { + unsigned long nr_zeros = __ffs64(cpu_addr); + u64 alignment = 1ULL << nr_zeros; + + size = min(range->size, alignment); + } else { + size = range->size; + } + /* Hardware supports max 4GiB inbound region */ + size = min(size, 1ULL << 32); + + mask = roundup_pow_of_two(size) - 1; + mask &= ~0xf; + + while (cpu_addr < cpu_end) { + rcar_pcie_set_inbound(pcie->base, cpu_addr, pci_addr, + mask | flags, idx, true); + pci_addr += size; + cpu_addr += size; + idx += 2; + + if (idx > MAX_NR_INBOUND_MAPS) { + dev_err(pcie->dev, "Failed to map inbound regions!\n"); + return -EINVAL; + } + } + *index = idx; + + return 0; +} + +static int rcar_pcie_parse_map_dma_ranges(struct rcar_pcie *pcie, + struct device_node *np) +{ + struct of_pci_range_parser parser; + struct of_pci_range range; + int index = 0; + int err; + + if (of_pci_dma_range_parser_init(&parser, np)) + return -EINVAL; + + /* Get the dma-ranges from DT */ + for_each_of_pci_range(&parser, &range) { + u64 end = range.cpu_addr + range.size - 1; + + dev_dbg(pcie->dev, "0x%08x 0x%016llx..0x%016llx -> 0x%016llx\n", + range.flags, range.cpu_addr, end, range.pci_addr); + + err = rcar_pcie_inbound_ranges(pcie, &range, &index); + if (err) + return err; + } + + return 0; +} + +static const struct of_device_id rcar_pcie_of_match[] = { + { .compatible = "renesas,pcie-r8a7779", + .data = rcar_pcie_phy_init_h1 }, + { .compatible = "renesas,pcie-r8a7790", + .data = rcar_pcie_phy_init_gen2 }, + { .compatible = "renesas,pcie-r8a7791", + .data = rcar_pcie_phy_init_gen2 }, + { .compatible = "renesas,pcie-rcar-gen2", + .data = rcar_pcie_phy_init_gen2 }, + { .compatible = "renesas,pcie-r8a7795", + .data = rcar_pcie_phy_init_gen3 }, + { .compatible = "renesas,pcie-rcar-gen3", + .data = rcar_pcie_phy_init_gen3 }, + {}, +}; + +static int rcar_pcie_probe(struct platform_device *pdev) +{ + int (*phy_init_fn)(struct rcar_pcie *pcie); + struct device *dev = &pdev->dev; + struct pci_host_bridge *bridge; + struct rcar_pcie *pcie; + u32 data; + int err; + + bridge = pci_alloc_host_bridge(sizeof(*pcie)); + if (!bridge) + return -ENOMEM; + + pcie = pci_host_bridge_priv(bridge); + + pcie->dev = dev; + platform_set_drvdata(pdev, pcie); + + err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL); + if (err) + goto err_free_bridge; + + pm_runtime_enable(pcie->dev); + err = pm_runtime_get_sync(pcie->dev); + if (err < 0) { + dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); + goto err_pm_disable; + } + + err = rcar_pcie_get_resources(pcie); + if (err < 0) { + dev_err(dev, "failed to request resources: %d\n", err); + goto err_pm_put; + } + + err = clk_prepare_enable(pcie->bus_clk); + if (err) { + dev_err(dev, "failed to enable bus clock: %d\n", err); + goto err_unmap_msi_irqs; + } + + err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node); + if (err) + goto err_clk_disable; + + phy_init_fn = of_device_get_match_data(dev); + err = phy_init_fn(pcie); + if (err) { + dev_err(dev, "failed to init PCIe PHY\n"); + goto err_clk_disable; + } + + /* Failure to get a link might just be that no cards are inserted */ + if (rcar_pcie_hw_init(pcie)) { + dev_info(dev, "PCIe link down\n"); + err = -ENODEV; + goto err_phy_shutdown; + } + + data = rcar_pci_read_reg(pcie->base, MACSR); + dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f); + + if (IS_ENABLED(CONFIG_PCI_MSI)) { + err = rcar_pcie_enable_msi(pcie); + if (err < 0) { + dev_err(dev, + "failed to enable MSI support: %d\n", + err); + goto err_phy_shutdown; + } + } + + err = rcar_pcie_enable(pcie); + if (err) + goto err_msi_teardown; + + return 0; + +err_msi_teardown: + if (IS_ENABLED(CONFIG_PCI_MSI)) + rcar_pcie_teardown_msi(pcie); + +err_phy_shutdown: + if (pcie->phy) { + phy_power_off(pcie->phy); + phy_exit(pcie->phy); + } + +err_clk_disable: + clk_disable_unprepare(pcie->bus_clk); + +err_unmap_msi_irqs: + irq_dispose_mapping(pcie->msi.irq2); + irq_dispose_mapping(pcie->msi.irq1); + +err_pm_put: + pm_runtime_put(dev); + +err_pm_disable: + pm_runtime_disable(dev); + pci_free_resource_list(&pcie->resources); + +err_free_bridge: + pci_free_host_bridge(bridge); + + return err; +} + +static int rcar_pcie_resume_noirq(struct device *dev) +{ + struct rcar_pcie *pcie = dev_get_drvdata(dev); + + if (rcar_pci_read_reg(pcie->base, PMSR) && + !(rcar_pci_read_reg(pcie->base, PCIETCTLR) & DL_DOWN)) + return 0; + + /* Re-establish the PCIe link */ + rcar_rmw32(pcie->base, MACCTLR, MACCTLR_RESERVED, 0); + rcar_pci_write_reg(pcie->base, CFINIT, PCIETCTLR); + return rcar_pcie_wait_for_dl(pcie->base); +} + +static const struct dev_pm_ops rcar_pcie_pm_ops = { + .resume_noirq = rcar_pcie_resume_noirq, +}; + +static struct platform_driver rcar_pcie_driver = { + .driver = { + .name = "rcar-pcie", + .of_match_table = rcar_pcie_of_match, + .pm = &rcar_pcie_pm_ops, + .suppress_bind_attrs = true, + }, + .probe = rcar_pcie_probe, +}; +builtin_platform_driver(rcar_pcie_driver); diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c index e45bb2a7bfa5..1008ae6a896c 100644 --- a/drivers/pci/controller/pcie-rcar.c +++ b/drivers/pci/controller/pcie-rcar.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * PCIe driver for Renesas R-Car SoCs - * Copyright (C) 2014 Renesas Electronics Europe Ltd + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd * * Based on: * arch/sh/drivers/pci/pcie-sh7786.c @@ -11,534 +11,80 @@ * Author: Phil Edworthy <phil.edworthy@renesas.com> */ -#include <linux/bitops.h> -#include <linux/clk.h> #include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/irqdomain.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/msi.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/of_pci.h> -#include <linux/of_platform.h> #include <linux/pci.h> -#include <linux/phy/phy.h> -#include <linux/platform_device.h> -#include <linux/pm_runtime.h> -#include <linux/slab.h> -#define PCIECAR 0x000010 -#define PCIECCTLR 0x000018 -#define CONFIG_SEND_ENABLE BIT(31) -#define TYPE0 (0 << 8) -#define TYPE1 BIT(8) -#define PCIECDR 0x000020 -#define PCIEMSR 0x000028 -#define PCIEINTXR 0x000400 -#define PCIEPHYSR 0x0007f0 -#define PHYRDY BIT(0) -#define PCIEMSITXR 0x000840 +#include "pcie-rcar.h" -/* Transfer control */ -#define PCIETCTLR 0x02000 -#define DL_DOWN BIT(3) -#define CFINIT BIT(0) -#define PCIETSTR 0x02004 -#define DATA_LINK_ACTIVE BIT(0) -#define PCIEERRFR 0x02020 -#define UNSUPPORTED_REQUEST BIT(4) -#define PCIEMSIFR 0x02044 -#define PCIEMSIALR 0x02048 -#define MSIFE BIT(0) -#define PCIEMSIAUR 0x0204c -#define PCIEMSIIER 0x02050 - -/* root port address */ -#define PCIEPRAR(x) (0x02080 + ((x) * 0x4)) - -/* local address reg & mask */ -#define PCIELAR(x) (0x02200 + ((x) * 0x20)) -#define PCIELAMR(x) (0x02208 + ((x) * 0x20)) -#define LAM_PREFETCH BIT(3) -#define LAM_64BIT BIT(2) -#define LAR_ENABLE BIT(1) - -/* PCIe address reg & mask */ -#define PCIEPALR(x) (0x03400 + ((x) * 0x20)) -#define PCIEPAUR(x) (0x03404 + ((x) * 0x20)) -#define PCIEPAMR(x) (0x03408 + ((x) * 0x20)) -#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20)) -#define PAR_ENABLE BIT(31) -#define IO_SPACE BIT(8) - -/* Configuration */ -#define PCICONF(x) (0x010000 + ((x) * 0x4)) -#define PMCAP(x) (0x010040 + ((x) * 0x4)) -#define EXPCAP(x) (0x010070 + ((x) * 0x4)) -#define VCCAP(x) (0x010100 + ((x) * 0x4)) - -/* link layer */ -#define IDSETR1 0x011004 -#define TLCTLR 0x011048 -#define MACSR 0x011054 -#define SPCHGFIN BIT(4) -#define SPCHGFAIL BIT(6) -#define SPCHGSUC BIT(7) -#define LINK_SPEED (0xf << 16) -#define LINK_SPEED_2_5GTS (1 << 16) -#define LINK_SPEED_5_0GTS (2 << 16) -#define MACCTLR 0x011058 -#define MACCTLR_RESERVED BIT(0) -#define SPEED_CHANGE BIT(24) -#define SCRAMBLE_DISABLE BIT(27) -#define PMSR 0x01105c -#define MACS2R 0x011078 -#define MACCGSPSETR 0x011084 -#define SPCNGRSN BIT(31) - -/* R-Car H1 PHY */ -#define H1_PCIEPHYADRR 0x04000c -#define WRITE_CMD BIT(16) -#define PHY_ACK BIT(24) -#define RATE_POS 12 -#define LANE_POS 8 -#define ADR_POS 0 -#define H1_PCIEPHYDOUTR 0x040014 - -/* R-Car Gen2 PHY */ -#define GEN2_PCIEPHYADDR 0x780 -#define GEN2_PCIEPHYDATA 0x784 -#define GEN2_PCIEPHYCTRL 0x78c - -#define INT_PCI_MSI_NR 32 - -#define RCONF(x) (PCICONF(0) + (x)) -#define RPMCAP(x) (PMCAP(0) + (x)) -#define REXPCAP(x) (EXPCAP(0) + (x)) -#define RVCCAP(x) (VCCAP(0) + (x)) - -#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24) -#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19) -#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16) - -#define RCAR_PCI_MAX_RESOURCES 4 -#define MAX_NR_INBOUND_MAPS 6 - -struct rcar_msi { - DECLARE_BITMAP(used, INT_PCI_MSI_NR); - struct irq_domain *domain; - struct msi_controller chip; - unsigned long pages; - struct mutex lock; - int irq1; - int irq2; -}; - -static inline struct rcar_msi *to_rcar_msi(struct msi_controller *chip) -{ - return container_of(chip, struct rcar_msi, chip); -} - -/* Structure representing the PCIe interface */ -struct rcar_pcie { - struct device *dev; - struct phy *phy; - void __iomem *base; - struct list_head resources; - int root_bus_nr; - struct clk *bus_clk; - struct rcar_msi msi; -}; - -static void rcar_pci_write_reg(struct rcar_pcie *pcie, u32 val, - unsigned int reg) +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg) { - writel(val, pcie->base + reg); + writel(val, base + reg); } -static u32 rcar_pci_read_reg(struct rcar_pcie *pcie, unsigned int reg) +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg) { - return readl(pcie->base + reg); + return readl(base + reg); } -enum { - RCAR_PCI_ACCESS_READ, - RCAR_PCI_ACCESS_WRITE, -}; - -static void rcar_rmw32(struct rcar_pcie *pcie, int where, u32 mask, u32 data) +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data) { unsigned int shift = BITS_PER_BYTE * (where & 3); - u32 val = rcar_pci_read_reg(pcie, where & ~3); + u32 val = rcar_pci_read_reg(base, where & ~3); val &= ~(mask << shift); val |= data << shift; - rcar_pci_write_reg(pcie, val, where & ~3); -} - -static u32 rcar_read_conf(struct rcar_pcie *pcie, int where) -{ - unsigned int shift = BITS_PER_BYTE * (where & 3); - u32 val = rcar_pci_read_reg(pcie, where & ~3); - - return val >> shift; + rcar_pci_write_reg(base, val, where & ~3); } -/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ -static int rcar_pcie_config_access(struct rcar_pcie *pcie, - unsigned char access_type, struct pci_bus *bus, - unsigned int devfn, int where, u32 *data) -{ - unsigned int dev, func, reg, index; - - dev = PCI_SLOT(devfn); - func = PCI_FUNC(devfn); - reg = where & ~3; - index = reg / 4; - - /* - * While each channel has its own memory-mapped extended config - * space, it's generally only accessible when in endpoint mode. - * When in root complex mode, the controller is unable to target - * itself with either type 0 or type 1 accesses, and indeed, any - * controller initiated target transfer to its own config space - * result in a completer abort. - * - * Each channel effectively only supports a single device, but as - * the same channel <-> device access works for any PCI_SLOT() - * value, we cheat a bit here and bind the controller's config - * space to devfn 0 in order to enable self-enumeration. In this - * case the regular ECAR/ECDR path is sidelined and the mangled - * config access itself is initiated as an internal bus transaction. - */ - if (pci_is_root_bus(bus)) { - if (dev != 0) - return PCIBIOS_DEVICE_NOT_FOUND; - - if (access_type == RCAR_PCI_ACCESS_READ) { - *data = rcar_pci_read_reg(pcie, PCICONF(index)); - } else { - /* Keep an eye out for changes to the root bus number */ - if (pci_is_root_bus(bus) && (reg == PCI_PRIMARY_BUS)) - pcie->root_bus_nr = *data & 0xff; - - rcar_pci_write_reg(pcie, *data, PCICONF(index)); - } - - return PCIBIOS_SUCCESSFUL; - } - - if (pcie->root_bus_nr < 0) - return PCIBIOS_DEVICE_NOT_FOUND; - - /* Clear errors */ - rcar_pci_write_reg(pcie, rcar_pci_read_reg(pcie, PCIEERRFR), PCIEERRFR); - - /* Set the PIO address */ - rcar_pci_write_reg(pcie, PCIE_CONF_BUS(bus->number) | - PCIE_CONF_DEV(dev) | PCIE_CONF_FUNC(func) | reg, PCIECAR); - - /* Enable the configuration access */ - if (bus->parent->number == pcie->root_bus_nr) - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR); - else - rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR); - - /* Check for errors */ - if (rcar_pci_read_reg(pcie, PCIEERRFR) & UNSUPPORTED_REQUEST) - return PCIBIOS_DEVICE_NOT_FOUND; - - /* Check for master and target aborts */ - if (rcar_read_conf(pcie, RCONF(PCI_STATUS)) & - (PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT)) - return PCIBIOS_DEVICE_NOT_FOUND; - - if (access_type == RCAR_PCI_ACCESS_READ) - *data = rcar_pci_read_reg(pcie, PCIECDR); - else - rcar_pci_write_reg(pcie, *data, PCIECDR); - - /* Disable the configuration access */ - rcar_pci_write_reg(pcie, 0, PCIECCTLR); - - return PCIBIOS_SUCCESSFUL; -} - -static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 *val) -{ - struct rcar_pcie *pcie = bus->sysdata; - int ret; - - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, - bus, devfn, where, val); - if (ret != PCIBIOS_SUCCESSFUL) { - *val = 0xffffffff; - return ret; - } - - if (size == 1) - *val = (*val >> (BITS_PER_BYTE * (where & 3))) & 0xff; - else if (size == 2) - *val = (*val >> (BITS_PER_BYTE * (where & 2))) & 0xffff; - - dev_dbg(&bus->dev, "pcie-config-read: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", - bus->number, devfn, where, size, *val); - - return ret; -} - -/* Serialization is provided by 'pci_lock' in drivers/pci/access.c */ -static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn, - int where, int size, u32 val) -{ - struct rcar_pcie *pcie = bus->sysdata; - unsigned int shift; - u32 data; - int ret; - - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_READ, - bus, devfn, where, &data); - if (ret != PCIBIOS_SUCCESSFUL) - return ret; - - dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n", - bus->number, devfn, where, size, val); - - if (size == 1) { - shift = BITS_PER_BYTE * (where & 3); - data &= ~(0xff << shift); - data |= ((val & 0xff) << shift); - } else if (size == 2) { - shift = BITS_PER_BYTE * (where & 2); - data &= ~(0xffff << shift); - data |= ((val & 0xffff) << shift); - } else - data = val; - - ret = rcar_pcie_config_access(pcie, RCAR_PCI_ACCESS_WRITE, - bus, devfn, where, &data); - - return ret; -} - -static struct pci_ops rcar_pcie_ops = { - .read = rcar_pcie_read_conf, - .write = rcar_pcie_write_conf, -}; - -static void rcar_pcie_setup_window(int win, struct rcar_pcie *pcie, - struct resource *res) +void rcar_pcie_set_outbound(int win, void __iomem *base, + struct resource *res, bool host) { /* Setup PCIe address space mappings for each resource */ - resource_size_t size; - resource_size_t res_start; - u32 mask; - - rcar_pci_write_reg(pcie, 0x00000000, PCIEPTCTLR(win)); + resource_size_t size = 0; + resource_size_t res_start = 0; + u32 mask = 0x0; + rcar_pci_write_reg(base, mask, PCIEPTCTLR(win)); /* * The PAMR mask is calculated in units of 128Bytes, which * keeps things pretty simple. */ size = resource_size(res); - mask = (roundup_pow_of_two(size) / SZ_128) - 1; - rcar_pci_write_reg(pcie, mask << 7, PCIEPAMR(win)); + if (size > 128) + mask = (roundup_pow_of_two(size) / SZ_128) - 1; + rcar_pci_write_reg(base, mask << 7, PCIEPAMR(win)); - if (res->flags & IORESOURCE_IO) - res_start = pci_pio_to_address(res->start); - else + if (!host) { res_start = res->start; + } else { + if (res->flags & IORESOURCE_IO) + res_start = pci_pio_to_address(res->start); + else + res_start = res->start; + } - rcar_pci_write_reg(pcie, upper_32_bits(res_start), PCIEPAUR(win)); - rcar_pci_write_reg(pcie, lower_32_bits(res_start) & ~0x7F, + rcar_pci_write_reg(base, upper_32_bits(res_start), PCIEPAUR(win)); + rcar_pci_write_reg(base, lower_32_bits(res_start) & ~0x7F, PCIEPALR(win)); - /* First resource is for IO */ - mask = PAR_ENABLE; + mask = 0x0; + if (res->start) + mask = PAR_ENABLE; + if (res->flags & IORESOURCE_IO) mask |= IO_SPACE; - rcar_pci_write_reg(pcie, mask, PCIEPTCTLR(win)); -} - -static int rcar_pcie_setup(struct list_head *resource, struct rcar_pcie *pci) -{ - struct resource_entry *win; - int i = 0; - - /* Setup PCI resources */ - resource_list_for_each_entry(win, &pci->resources) { - struct resource *res = win->res; - - if (!res->flags) - continue; - - switch (resource_type(res)) { - case IORESOURCE_IO: - case IORESOURCE_MEM: - rcar_pcie_setup_window(i, pci, res); - i++; - break; - case IORESOURCE_BUS: - pci->root_bus_nr = res->start; - break; - default: - continue; - } - - pci_add_resource(resource, res); - } - - return 1; -} - -static void rcar_pcie_force_speedup(struct rcar_pcie *pcie) -{ - struct device *dev = pcie->dev; - unsigned int timeout = 1000; - u32 macsr; - - if ((rcar_pci_read_reg(pcie, MACS2R) & LINK_SPEED) != LINK_SPEED_5_0GTS) - return; - - if (rcar_pci_read_reg(pcie, MACCTLR) & SPEED_CHANGE) { - dev_err(dev, "Speed change already in progress\n"); - return; - } - - macsr = rcar_pci_read_reg(pcie, MACSR); - if ((macsr & LINK_SPEED) == LINK_SPEED_5_0GTS) - goto done; - - /* Set target link speed to 5.0 GT/s */ - rcar_rmw32(pcie, EXPCAP(12), PCI_EXP_LNKSTA_CLS, - PCI_EXP_LNKSTA_CLS_5_0GB); - - /* Set speed change reason as intentional factor */ - rcar_rmw32(pcie, MACCGSPSETR, SPCNGRSN, 0); - - /* Clear SPCHGFIN, SPCHGSUC, and SPCHGFAIL */ - if (macsr & (SPCHGFIN | SPCHGSUC | SPCHGFAIL)) - rcar_pci_write_reg(pcie, macsr, MACSR); - - /* Start link speed change */ - rcar_rmw32(pcie, MACCTLR, SPEED_CHANGE, SPEED_CHANGE); - - while (timeout--) { - macsr = rcar_pci_read_reg(pcie, MACSR); - if (macsr & SPCHGFIN) { - /* Clear the interrupt bits */ - rcar_pci_write_reg(pcie, macsr, MACSR); - - if (macsr & SPCHGFAIL) - dev_err(dev, "Speed change failed\n"); - - goto done; - } - - msleep(1); - } - - dev_err(dev, "Speed change timed out\n"); - -done: - dev_info(dev, "Current link speed is %s GT/s\n", - (macsr & LINK_SPEED) == LINK_SPEED_5_0GTS ? "5" : "2.5"); -} - -static int rcar_pcie_enable(struct rcar_pcie *pcie) -{ - struct device *dev = pcie->dev; - struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); - struct pci_bus *bus, *child; - int ret; - - /* Try setting 5 GT/s link speed */ - rcar_pcie_force_speedup(pcie); - - rcar_pcie_setup(&bridge->windows, pcie); - - pci_add_flags(PCI_REASSIGN_ALL_BUS); - - bridge->dev.parent = dev; - bridge->sysdata = pcie; - bridge->busnr = pcie->root_bus_nr; - bridge->ops = &rcar_pcie_ops; - bridge->map_irq = of_irq_parse_and_map_pci; - bridge->swizzle_irq = pci_common_swizzle; - if (IS_ENABLED(CONFIG_PCI_MSI)) - bridge->msi = &pcie->msi.chip; - - ret = pci_scan_root_bus_bridge(bridge); - if (ret < 0) - return ret; - - bus = bridge->bus; - - pci_bus_size_bridges(bus); - pci_bus_assign_resources(bus); - - list_for_each_entry(child, &bus->children, node) - pcie_bus_configure_settings(child); - - pci_bus_add_devices(bus); - - return 0; -} - -static int phy_wait_for_ack(struct rcar_pcie *pcie) -{ - struct device *dev = pcie->dev; - unsigned int timeout = 100; - - while (timeout--) { - if (rcar_pci_read_reg(pcie, H1_PCIEPHYADRR) & PHY_ACK) - return 0; - - udelay(100); - } - - dev_err(dev, "Access to PCIe phy timed out\n"); - - return -ETIMEDOUT; -} - -static void phy_write_reg(struct rcar_pcie *pcie, - unsigned int rate, u32 addr, - unsigned int lane, u32 data) -{ - u32 phyaddr; - - phyaddr = WRITE_CMD | - ((rate & 1) << RATE_POS) | - ((lane & 0xf) << LANE_POS) | - ((addr & 0xff) << ADR_POS); - - /* Set write data */ - rcar_pci_write_reg(pcie, data, H1_PCIEPHYDOUTR); - rcar_pci_write_reg(pcie, phyaddr, H1_PCIEPHYADRR); - - /* Ignore errors as they will be dealt with if the data link is down */ - phy_wait_for_ack(pcie); - - /* Clear command */ - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYDOUTR); - rcar_pci_write_reg(pcie, 0, H1_PCIEPHYADRR); - - /* Ignore errors as they will be dealt with if the data link is down */ - phy_wait_for_ack(pcie); + rcar_pci_write_reg(base, mask, PCIEPTCTLR(win)); + /* flush modifications */ + wmb(); } -static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie) +int rcar_pcie_wait_for_phyrdy(void __iomem *base) { unsigned int timeout = 10; while (timeout--) { - if (rcar_pci_read_reg(pcie, PCIEPHYSR) & PHYRDY) + if (rcar_pci_read_reg(base, PCIEPHYSR) & PHYRDY) return 0; msleep(5); @@ -547,12 +93,12 @@ static int rcar_pcie_wait_for_phyrdy(struct rcar_pcie *pcie) return -ETIMEDOUT; } -static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie) +int rcar_pcie_wait_for_dl(void __iomem *base) { unsigned int timeout = 10000; while (timeout--) { - if ((rcar_pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE)) + if ((rcar_pci_read_reg(base, PCIETSTR) & DATA_LINK_ACTIVE)) return 0; udelay(5); @@ -562,698 +108,27 @@ static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie) return -ETIMEDOUT; } -static int rcar_pcie_hw_init(struct rcar_pcie *pcie) -{ - int err; - - /* Begin initialization */ - rcar_pci_write_reg(pcie, 0, PCIETCTLR); - - /* Set mode */ - rcar_pci_write_reg(pcie, 1, PCIEMSR); - - err = rcar_pcie_wait_for_phyrdy(pcie); - if (err) - return err; - - /* - * Initial header for port config space is type 1, set the device - * class to match. Hardware takes care of propagating the IDSETR - * settings, so there is no need to bother with a quirk. - */ - rcar_pci_write_reg(pcie, PCI_CLASS_BRIDGE_PCI << 16, IDSETR1); - - /* - * Setup Secondary Bus Number & Subordinate Bus Number, even though - * they aren't used, to avoid bridge being detected as broken. - */ - rcar_rmw32(pcie, RCONF(PCI_SECONDARY_BUS), 0xff, 1); - rcar_rmw32(pcie, RCONF(PCI_SUBORDINATE_BUS), 0xff, 1); - - /* Initialize default capabilities. */ - rcar_rmw32(pcie, REXPCAP(0), 0xff, PCI_CAP_ID_EXP); - rcar_rmw32(pcie, REXPCAP(PCI_EXP_FLAGS), - PCI_EXP_FLAGS_TYPE, PCI_EXP_TYPE_ROOT_PORT << 4); - rcar_rmw32(pcie, RCONF(PCI_HEADER_TYPE), 0x7f, - PCI_HEADER_TYPE_BRIDGE); - - /* Enable data link layer active state reporting */ - rcar_rmw32(pcie, REXPCAP(PCI_EXP_LNKCAP), PCI_EXP_LNKCAP_DLLLARC, - PCI_EXP_LNKCAP_DLLLARC); - - /* Write out the physical slot number = 0 */ - rcar_rmw32(pcie, REXPCAP(PCI_EXP_SLTCAP), PCI_EXP_SLTCAP_PSN, 0); - - /* Set the completion timer timeout to the maximum 50ms. */ - rcar_rmw32(pcie, TLCTLR + 1, 0x3f, 50); - - /* Terminate list of capabilities (Next Capability Offset=0) */ - rcar_rmw32(pcie, RVCCAP(0), 0xfff00000, 0); - - /* Enable MSI */ - if (IS_ENABLED(CONFIG_PCI_MSI)) - rcar_pci_write_reg(pcie, 0x801f0000, PCIEMSITXR); - - rcar_rmw32(pcie, MACCTLR, MACCTLR_RESERVED, 0); - - /* Finish initialization - establish a PCI Express link */ - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR); - - /* This will timeout if we don't have a link. */ - err = rcar_pcie_wait_for_dl(pcie); - if (err) - return err; - - /* Enable INTx interrupts */ - rcar_rmw32(pcie, PCIEINTXR, 0, 0xF << 8); - - wmb(); - - return 0; -} - -static int rcar_pcie_phy_init_h1(struct rcar_pcie *pcie) -{ - /* Initialize the phy */ - phy_write_reg(pcie, 0, 0x42, 0x1, 0x0EC34191); - phy_write_reg(pcie, 1, 0x42, 0x1, 0x0EC34180); - phy_write_reg(pcie, 0, 0x43, 0x1, 0x00210188); - phy_write_reg(pcie, 1, 0x43, 0x1, 0x00210188); - phy_write_reg(pcie, 0, 0x44, 0x1, 0x015C0014); - phy_write_reg(pcie, 1, 0x44, 0x1, 0x015C0014); - phy_write_reg(pcie, 1, 0x4C, 0x1, 0x786174A0); - phy_write_reg(pcie, 1, 0x4D, 0x1, 0x048000BB); - phy_write_reg(pcie, 0, 0x51, 0x1, 0x079EC062); - phy_write_reg(pcie, 0, 0x52, 0x1, 0x20000000); - phy_write_reg(pcie, 1, 0x52, 0x1, 0x20000000); - phy_write_reg(pcie, 1, 0x56, 0x1, 0x00003806); - - phy_write_reg(pcie, 0, 0x60, 0x1, 0x004B03A5); - phy_write_reg(pcie, 0, 0x64, 0x1, 0x3F0F1F0F); - phy_write_reg(pcie, 0, 0x66, 0x1, 0x00008000); - - return 0; -} - -static int rcar_pcie_phy_init_gen2(struct rcar_pcie *pcie) -{ - /* - * These settings come from the R-Car Series, 2nd Generation User's - * Manual, section 50.3.1 (2) Initialization of the physical layer. - */ - rcar_pci_write_reg(pcie, 0x000f0030, GEN2_PCIEPHYADDR); - rcar_pci_write_reg(pcie, 0x00381203, GEN2_PCIEPHYDATA); - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); - - rcar_pci_write_reg(pcie, 0x000f0054, GEN2_PCIEPHYADDR); - /* The following value is for DC connection, no termination resistor */ - rcar_pci_write_reg(pcie, 0x13802007, GEN2_PCIEPHYDATA); - rcar_pci_write_reg(pcie, 0x00000001, GEN2_PCIEPHYCTRL); - rcar_pci_write_reg(pcie, 0x00000006, GEN2_PCIEPHYCTRL); - - return 0; -} - -static int rcar_pcie_phy_init_gen3(struct rcar_pcie *pcie) -{ - int err; - - err = phy_init(pcie->phy); - if (err) - return err; - - err = phy_power_on(pcie->phy); - if (err) - phy_exit(pcie->phy); - - return err; -} - -static int rcar_msi_alloc(struct rcar_msi *chip) -{ - int msi; - - mutex_lock(&chip->lock); - - msi = find_first_zero_bit(chip->used, INT_PCI_MSI_NR); - if (msi < INT_PCI_MSI_NR) - set_bit(msi, chip->used); - else - msi = -ENOSPC; - - mutex_unlock(&chip->lock); - - return msi; -} - -static int rcar_msi_alloc_region(struct rcar_msi *chip, int no_irqs) -{ - int msi; - - mutex_lock(&chip->lock); - msi = bitmap_find_free_region(chip->used, INT_PCI_MSI_NR, - order_base_2(no_irqs)); - mutex_unlock(&chip->lock); - - return msi; -} - -static void rcar_msi_free(struct rcar_msi *chip, unsigned long irq) -{ - mutex_lock(&chip->lock); - clear_bit(irq, chip->used); - mutex_unlock(&chip->lock); -} - -static irqreturn_t rcar_pcie_msi_irq(int irq, void *data) -{ - struct rcar_pcie *pcie = data; - struct rcar_msi *msi = &pcie->msi; - struct device *dev = pcie->dev; - unsigned long reg; - - reg = rcar_pci_read_reg(pcie, PCIEMSIFR); - - /* MSI & INTx share an interrupt - we only handle MSI here */ - if (!reg) - return IRQ_NONE; - - while (reg) { - unsigned int index = find_first_bit(®, 32); - unsigned int msi_irq; - - /* clear the interrupt */ - rcar_pci_write_reg(pcie, 1 << index, PCIEMSIFR); - - msi_irq = irq_find_mapping(msi->domain, index); - if (msi_irq) { - if (test_bit(index, msi->used)) - generic_handle_irq(msi_irq); - else - dev_info(dev, "unhandled MSI\n"); - } else { - /* Unknown MSI, just clear it */ - dev_dbg(dev, "unexpected MSI\n"); - } - - /* see if there's any more pending in this vector */ - reg = rcar_pci_read_reg(pcie, PCIEMSIFR); - } - - return IRQ_HANDLED; -} - -static int rcar_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, - struct msi_desc *desc) -{ - struct rcar_msi *msi = to_rcar_msi(chip); - struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); - struct msi_msg msg; - unsigned int irq; - int hwirq; - - hwirq = rcar_msi_alloc(msi); - if (hwirq < 0) - return hwirq; - - irq = irq_find_mapping(msi->domain, hwirq); - if (!irq) { - rcar_msi_free(msi, hwirq); - return -EINVAL; - } - - irq_set_msi_desc(irq, desc); - - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); - msg.data = hwirq; - - pci_write_msi_msg(irq, &msg); - - return 0; -} - -static int rcar_msi_setup_irqs(struct msi_controller *chip, - struct pci_dev *pdev, int nvec, int type) -{ - struct rcar_pcie *pcie = container_of(chip, struct rcar_pcie, msi.chip); - struct rcar_msi *msi = to_rcar_msi(chip); - struct msi_desc *desc; - struct msi_msg msg; - unsigned int irq; - int hwirq; - int i; - - /* MSI-X interrupts are not supported */ - if (type == PCI_CAP_ID_MSIX) - return -EINVAL; - - WARN_ON(!list_is_singular(&pdev->dev.msi_list)); - desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list); - - hwirq = rcar_msi_alloc_region(msi, nvec); - if (hwirq < 0) - return -ENOSPC; - - irq = irq_find_mapping(msi->domain, hwirq); - if (!irq) - return -ENOSPC; - - for (i = 0; i < nvec; i++) { - /* - * irq_create_mapping() called from rcar_pcie_probe() pre- - * allocates descs, so there is no need to allocate descs here. - * We can therefore assume that if irq_find_mapping() above - * returns non-zero, then the descs are also successfully - * allocated. - */ - if (irq_set_msi_desc_off(irq, i, desc)) { - /* TODO: clear */ - return -EINVAL; - } - } - - desc->nvec_used = nvec; - desc->msi_attrib.multiple = order_base_2(nvec); - - msg.address_lo = rcar_pci_read_reg(pcie, PCIEMSIALR) & ~MSIFE; - msg.address_hi = rcar_pci_read_reg(pcie, PCIEMSIAUR); - msg.data = hwirq; - - pci_write_msi_msg(irq, &msg); - - return 0; -} - -static void rcar_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) -{ - struct rcar_msi *msi = to_rcar_msi(chip); - struct irq_data *d = irq_get_irq_data(irq); - - rcar_msi_free(msi, d->hwirq); -} - -static struct irq_chip rcar_msi_irq_chip = { - .name = "R-Car PCIe MSI", - .irq_enable = pci_msi_unmask_irq, - .irq_disable = pci_msi_mask_irq, - .irq_mask = pci_msi_mask_irq, - .irq_unmask = pci_msi_unmask_irq, -}; - -static int rcar_msi_map(struct irq_domain *domain, unsigned int irq, - irq_hw_number_t hwirq) -{ - irq_set_chip_and_handler(irq, &rcar_msi_irq_chip, handle_simple_irq); - irq_set_chip_data(irq, domain->host_data); - - return 0; -} - -static const struct irq_domain_ops msi_domain_ops = { - .map = rcar_msi_map, -}; - -static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie) -{ - struct rcar_msi *msi = &pcie->msi; - int i, irq; - - for (i = 0; i < INT_PCI_MSI_NR; i++) { - irq = irq_find_mapping(msi->domain, i); - if (irq > 0) - irq_dispose_mapping(irq); - } - - irq_domain_remove(msi->domain); -} - -static int rcar_pcie_enable_msi(struct rcar_pcie *pcie) -{ - struct device *dev = pcie->dev; - struct rcar_msi *msi = &pcie->msi; - phys_addr_t base; - int err, i; - - mutex_init(&msi->lock); - - msi->chip.dev = dev; - msi->chip.setup_irq = rcar_msi_setup_irq; - msi->chip.setup_irqs = rcar_msi_setup_irqs; - msi->chip.teardown_irq = rcar_msi_teardown_irq; - - msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR, - &msi_domain_ops, &msi->chip); - if (!msi->domain) { - dev_err(dev, "failed to create IRQ domain\n"); - return -ENOMEM; - } - - for (i = 0; i < INT_PCI_MSI_NR; i++) - irq_create_mapping(msi->domain, i); - - /* Two irqs are for MSI, but they are also used for non-MSI irqs */ - err = devm_request_irq(dev, msi->irq1, rcar_pcie_msi_irq, - IRQF_SHARED | IRQF_NO_THREAD, - rcar_msi_irq_chip.name, pcie); - if (err < 0) { - dev_err(dev, "failed to request IRQ: %d\n", err); - goto err; - } - - err = devm_request_irq(dev, msi->irq2, rcar_pcie_msi_irq, - IRQF_SHARED | IRQF_NO_THREAD, - rcar_msi_irq_chip.name, pcie); - if (err < 0) { - dev_err(dev, "failed to request IRQ: %d\n", err); - goto err; - } - - /* setup MSI data target */ - msi->pages = __get_free_pages(GFP_KERNEL, 0); - if (!msi->pages) { - err = -ENOMEM; - goto err; - } - base = virt_to_phys((void *)msi->pages); - - rcar_pci_write_reg(pcie, lower_32_bits(base) | MSIFE, PCIEMSIALR); - rcar_pci_write_reg(pcie, upper_32_bits(base), PCIEMSIAUR); - - /* enable all MSI interrupts */ - rcar_pci_write_reg(pcie, 0xffffffff, PCIEMSIIER); - - return 0; - -err: - rcar_pcie_unmap_msi(pcie); - return err; -} - -static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie) -{ - struct rcar_msi *msi = &pcie->msi; - - /* Disable all MSI interrupts */ - rcar_pci_write_reg(pcie, 0, PCIEMSIIER); - - /* Disable address decoding of the MSI interrupt, MSIFE */ - rcar_pci_write_reg(pcie, 0, PCIEMSIALR); - - free_pages(msi->pages, 0); - - rcar_pcie_unmap_msi(pcie); -} - -static int rcar_pcie_get_resources(struct rcar_pcie *pcie) -{ - struct device *dev = pcie->dev; - struct resource res; - int err, i; - - pcie->phy = devm_phy_optional_get(dev, "pcie"); - if (IS_ERR(pcie->phy)) - return PTR_ERR(pcie->phy); - - err = of_address_to_resource(dev->of_node, 0, &res); - if (err) - return err; - - pcie->base = devm_ioremap_resource(dev, &res); - if (IS_ERR(pcie->base)) - return PTR_ERR(pcie->base); - - pcie->bus_clk = devm_clk_get(dev, "pcie_bus"); - if (IS_ERR(pcie->bus_clk)) { - dev_err(dev, "cannot get pcie bus clock\n"); - return PTR_ERR(pcie->bus_clk); - } - - i = irq_of_parse_and_map(dev->of_node, 0); - if (!i) { - dev_err(dev, "cannot get platform resources for msi interrupt\n"); - err = -ENOENT; - goto err_irq1; - } - pcie->msi.irq1 = i; - - i = irq_of_parse_and_map(dev->of_node, 1); - if (!i) { - dev_err(dev, "cannot get platform resources for msi interrupt\n"); - err = -ENOENT; - goto err_irq2; - } - pcie->msi.irq2 = i; - - return 0; - -err_irq2: - irq_dispose_mapping(pcie->msi.irq1); -err_irq1: - return err; -} - -static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie, - struct of_pci_range *range, - int *index) +void rcar_pcie_set_inbound(void __iomem *base, + u64 cpu_addr, u64 pci_addr, + u64 mask, int idx, bool host) { - u64 restype = range->flags; - u64 cpu_addr = range->cpu_addr; - u64 cpu_end = range->cpu_addr + range->size; - u64 pci_addr = range->pci_addr; - u32 flags = LAM_64BIT | LAR_ENABLE; - u64 mask; - u64 size; - int idx = *index; - - if (restype & IORESOURCE_PREFETCH) - flags |= LAM_PREFETCH; - /* - * If the size of the range is larger than the alignment of the start - * address, we have to use multiple entries to perform the mapping. - */ - if (cpu_addr > 0) { - unsigned long nr_zeros = __ffs64(cpu_addr); - u64 alignment = 1ULL << nr_zeros; - - size = min(range->size, alignment); - } else { - size = range->size; - } - /* Hardware supports max 4GiB inbound region */ - size = min(size, 1ULL << 32); - - mask = roundup_pow_of_two(size) - 1; - mask &= ~0xf; - - while (cpu_addr < cpu_end) { - /* - * Set up 64-bit inbound regions as the range parser doesn't - * distinguish between 32 and 64-bit types. - */ - rcar_pci_write_reg(pcie, lower_32_bits(pci_addr), + * Set up 64-bit inbound regions as the range parser doesn't + * distinguish between 32 and 64-bit types. + */ + if (host) { + rcar_pci_write_reg(base, lower_32_bits(pci_addr), PCIEPRAR(idx)); - rcar_pci_write_reg(pcie, lower_32_bits(cpu_addr), PCIELAR(idx)); - rcar_pci_write_reg(pcie, lower_32_bits(mask) | flags, - PCIELAMR(idx)); - - rcar_pci_write_reg(pcie, upper_32_bits(pci_addr), + rcar_pci_write_reg(base, upper_32_bits(pci_addr), PCIEPRAR(idx + 1)); - rcar_pci_write_reg(pcie, upper_32_bits(cpu_addr), - PCIELAR(idx + 1)); - rcar_pci_write_reg(pcie, 0, PCIELAMR(idx + 1)); - - pci_addr += size; - cpu_addr += size; - idx += 2; - - if (idx > MAX_NR_INBOUND_MAPS) { - dev_err(pcie->dev, "Failed to map inbound regions!\n"); - return -EINVAL; - } } - *index = idx; - - return 0; -} -static int rcar_pcie_parse_map_dma_ranges(struct rcar_pcie *pcie, - struct device_node *np) -{ - struct of_pci_range range; - struct of_pci_range_parser parser; - int index = 0; - int err; - - if (of_pci_dma_range_parser_init(&parser, np)) - return -EINVAL; - - /* Get the dma-ranges from DT */ - for_each_of_pci_range(&parser, &range) { - u64 end = range.cpu_addr + range.size - 1; + rcar_pci_write_reg(base, lower_32_bits(cpu_addr), PCIELAR(idx)); + rcar_pci_write_reg(base, lower_32_bits(mask), PCIELAMR(idx)); - dev_dbg(pcie->dev, "0x%08x 0x%016llx..0x%016llx -> 0x%016llx\n", - range.flags, range.cpu_addr, end, range.pci_addr); - - err = rcar_pcie_inbound_ranges(pcie, &range, &index); - if (err) - return err; - } + rcar_pci_write_reg(base, upper_32_bits(cpu_addr), PCIELAR(idx + 1)); + rcar_pci_write_reg(base, 0, PCIELAMR(idx + 1)); - return 0; -} - -static const struct of_device_id rcar_pcie_of_match[] = { - { .compatible = "renesas,pcie-r8a7779", - .data = rcar_pcie_phy_init_h1 }, - { .compatible = "renesas,pcie-r8a7790", - .data = rcar_pcie_phy_init_gen2 }, - { .compatible = "renesas,pcie-r8a7791", - .data = rcar_pcie_phy_init_gen2 }, - { .compatible = "renesas,pcie-rcar-gen2", - .data = rcar_pcie_phy_init_gen2 }, - { .compatible = "renesas,pcie-r8a7795", - .data = rcar_pcie_phy_init_gen3 }, - { .compatible = "renesas,pcie-rcar-gen3", - .data = rcar_pcie_phy_init_gen3 }, - {}, -}; - -static int rcar_pcie_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct rcar_pcie *pcie; - u32 data; - int err; - int (*phy_init_fn)(struct rcar_pcie *); - struct pci_host_bridge *bridge; - - bridge = pci_alloc_host_bridge(sizeof(*pcie)); - if (!bridge) - return -ENOMEM; - - pcie = pci_host_bridge_priv(bridge); - - pcie->dev = dev; - platform_set_drvdata(pdev, pcie); - - err = pci_parse_request_of_pci_ranges(dev, &pcie->resources, NULL); - if (err) - goto err_free_bridge; - - pm_runtime_enable(pcie->dev); - err = pm_runtime_get_sync(pcie->dev); - if (err < 0) { - dev_err(pcie->dev, "pm_runtime_get_sync failed\n"); - goto err_pm_disable; - } - - err = rcar_pcie_get_resources(pcie); - if (err < 0) { - dev_err(dev, "failed to request resources: %d\n", err); - goto err_pm_put; - } - - err = clk_prepare_enable(pcie->bus_clk); - if (err) { - dev_err(dev, "failed to enable bus clock: %d\n", err); - goto err_unmap_msi_irqs; - } - - err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node); - if (err) - goto err_clk_disable; - - phy_init_fn = of_device_get_match_data(dev); - err = phy_init_fn(pcie); - if (err) { - dev_err(dev, "failed to init PCIe PHY\n"); - goto err_clk_disable; - } - - /* Failure to get a link might just be that no cards are inserted */ - if (rcar_pcie_hw_init(pcie)) { - dev_info(dev, "PCIe link down\n"); - err = -ENODEV; - goto err_phy_shutdown; - } - - data = rcar_pci_read_reg(pcie, MACSR); - dev_info(dev, "PCIe x%d: link up\n", (data >> 20) & 0x3f); - - if (IS_ENABLED(CONFIG_PCI_MSI)) { - err = rcar_pcie_enable_msi(pcie); - if (err < 0) { - dev_err(dev, - "failed to enable MSI support: %d\n", - err); - goto err_phy_shutdown; - } - } - - err = rcar_pcie_enable(pcie); - if (err) - goto err_msi_teardown; - - return 0; - -err_msi_teardown: - if (IS_ENABLED(CONFIG_PCI_MSI)) - rcar_pcie_teardown_msi(pcie); - -err_phy_shutdown: - if (pcie->phy) { - phy_power_off(pcie->phy); - phy_exit(pcie->phy); - } - -err_clk_disable: - clk_disable_unprepare(pcie->bus_clk); - -err_unmap_msi_irqs: - irq_dispose_mapping(pcie->msi.irq2); - irq_dispose_mapping(pcie->msi.irq1); - -err_pm_put: - pm_runtime_put(dev); - -err_pm_disable: - pm_runtime_disable(dev); - pci_free_resource_list(&pcie->resources); - -err_free_bridge: - pci_free_host_bridge(bridge); - - return err; -} - -static int rcar_pcie_resume_noirq(struct device *dev) -{ - struct rcar_pcie *pcie = dev_get_drvdata(dev); - - if (rcar_pci_read_reg(pcie, PMSR) && - !(rcar_pci_read_reg(pcie, PCIETCTLR) & DL_DOWN)) - return 0; - - /* Re-establish the PCIe link */ - rcar_rmw32(pcie, MACCTLR, MACCTLR_RESERVED, 0); - rcar_pci_write_reg(pcie, CFINIT, PCIETCTLR); - return rcar_pcie_wait_for_dl(pcie); + /* flush modifications */ + wmb(); } - -static const struct dev_pm_ops rcar_pcie_pm_ops = { - .resume_noirq = rcar_pcie_resume_noirq, -}; - -static struct platform_driver rcar_pcie_driver = { - .driver = { - .name = "rcar-pcie", - .of_match_table = rcar_pcie_of_match, - .pm = &rcar_pcie_pm_ops, - .suppress_bind_attrs = true, - }, - .probe = rcar_pcie_probe, -}; -builtin_platform_driver(rcar_pcie_driver); diff --git a/drivers/pci/controller/pcie-rcar.h b/drivers/pci/controller/pcie-rcar.h new file mode 100644 index 000000000000..502621d4e6ac --- /dev/null +++ b/drivers/pci/controller/pcie-rcar.h @@ -0,0 +1,129 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * PCIe driver for Renesas R-Car SoCs + * Copyright (C) 2014-2019 Renesas Electronics Europe Ltd + * + * Author: Phil Edworthy <phil.edworthy@renesas.com> + */ +#ifndef _PCIE_RCAR_H +#define _PCIE_RCAR_H + +#define PCIECAR 0x000010 +#define PCIECCTLR 0x000018 +#define CONFIG_SEND_ENABLE BIT(31) +#define TYPE0 (0 << 8) +#define TYPE1 BIT(8) +#define PCIECDR 0x000020 +#define PCIEMSR 0x000028 +#define PCIEINTXR 0x000400 +#define PCIEPHYSR 0x0007f0 +#define PHYRDY BIT(0) +#define PCIEMSITXR 0x000840 + +/* Transfer control */ +#define PCIETCTLR 0x02000 +#define DL_DOWN BIT(3) +#define CFINIT BIT(0) +#define PCIETSTR 0x02004 +#define DATA_LINK_ACTIVE BIT(0) +#define PCIEERRFR 0x02020 +#define UNSUPPORTED_REQUEST BIT(4) +#define PCIEMSIFR 0x02044 +#define PCIEMSIALR 0x02048 +#define MSIFE BIT(0) +#define PCIEMSIAUR 0x0204c +#define PCIEMSIIER 0x02050 + +/* root port address */ +#define PCIEPRAR(x) (0x02080 + ((x) * 0x4)) + +/* local address reg & mask */ +#define PCIELAR(x) (0x02200 + ((x) * 0x20)) +#define PCIELAMR(x) (0x02208 + ((x) * 0x20)) +#define LAM_PREFETCH BIT(3) +#define LAM_64BIT BIT(2) +#define LAR_ENABLE BIT(1) + +/* PCIe address reg & mask */ +#define PCIEPALR(x) (0x03400 + ((x) * 0x20)) +#define PCIEPAUR(x) (0x03404 + ((x) * 0x20)) +#define PCIEPAMR(x) (0x03408 + ((x) * 0x20)) +#define PCIEPTCTLR(x) (0x0340c + ((x) * 0x20)) +#define PAR_ENABLE BIT(31) +#define IO_SPACE BIT(8) + +/* Configuration */ +#define PCICONF(x) (0x010000 + ((x) * 0x4)) +#define PMCAP(x) (0x010040 + ((x) * 0x4)) +#define EXPCAP(x) (0x010070 + ((x) * 0x4)) +#define VCCAP(x) (0x010100 + ((x) * 0x4)) + +/* link layer */ +#define IDSETR0 0x011000 +#define DEVICE_ID_SHFIT 16 +#define IDSETR1 0x011004 +#define SUBIDSETR 0x011024 +#define TLCTLR 0x011048 +#define MACSR 0x011054 +#define SPCHGFIN BIT(4) +#define SPCHGFAIL BIT(6) +#define SPCHGSUC BIT(7) +#define LINK_SPEED (0xf << 16) +#define LINK_SPEED_2_5GTS BIT(16) +#define LINK_SPEED_5_0GTS BIT(17) +#define MACCTLR 0x011058 +#define MACCTLR_RESERVED BIT(0) +#define SPEED_CHANGE BIT(24) +#define SCRAMBLE_DISABLE BIT(27) +#define PMSR 0x01105c +#define MACS2R 0x011078 +#define MACCGSPSETR 0x011084 +#define SPCNGRSN BIT(31) + +/* R-Car H1 PHY */ +#define H1_PCIEPHYADRR 0x04000c +#define WRITE_CMD BIT(16) +#define PHY_ACK BIT(24) +#define RATE_POS 12 +#define LANE_POS 8 +#define ADR_POS 0 +#define H1_PCIEPHYDOUTR 0x040014 + +/* R-Car Gen2 PHY */ +#define GEN2_PCIEPHYADDR 0x780 +#define GEN2_PCIEPHYDATA 0x784 +#define GEN2_PCIEPHYCTRL 0x78c + +#define INT_PCI_MSI_NR 32 + +#define RCONF(x) (PCICONF(0) + (x)) +#define RPMCAP(x) (PMCAP(0) + (x)) +#define REXPCAP(x) (EXPCAP(0) + (x)) +#define RVCCAP(x) (VCCAP(0) + (x)) + +#define INTDIS_SHIFT BIT(10) +#define ASTINTX_SHIFT BIT(16) + +#define PCIE_CONF_BUS(b) (((b) & 0xff) << 24) +#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 19) +#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 16) + +#define RCAR_PCI_MAX_RESOURCES 4 +#define MAX_NR_INBOUND_MAPS 6 + +enum { + RCAR_PCI_ACCESS_READ, + RCAR_PCI_ACCESS_WRITE, +}; + +void rcar_pci_write_reg(void __iomem *base, u32 val, unsigned int reg); +u32 rcar_pci_read_reg(void __iomem *base, unsigned int reg); +void rcar_rmw32(void __iomem *base, int where, u32 mask, u32 data); +int rcar_pcie_wait_for_phyrdy(void __iomem *base); +int rcar_pcie_wait_for_dl(void __iomem *base); +void rcar_pcie_set_outbound(int win, void __iomem *base, + struct resource *res, bool host); +void rcar_pcie_set_inbound(void __iomem *base, u64 cpu_addr, u64 pci_addr, + u64 mask, int idx, bool host); + +#endif