| Message ID | 20181120092615.11680-22-Zhiqiang.Hou@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | PCI: refactor Mobiveil driver and add PCIe Gen4 driver for NXP Layerscape SoCs | expand |
reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com> > -----Original Message----- > From: Z.q. Hou > Sent: Tuesday, November 20, 2018 5:28 PM > To: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org; > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; > bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com; > l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li > <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com; > catalin.marinas@arm.com; will.deacon@arm.com > Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian > <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>; Z.q. Hou > <zhiqiang.hou@nxp.com> > Subject: [PATCHv2 21/25] PCI: mobiveil: make mobiveil_host_init can be used > to re-init host > > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > > Make the mobiveil_host_init function can be used to re-init host controller's > PAB and GPEX CSR register block, as NXP integrated Mobiveil IP has to reset > and then re-init the PAB and GPEX CSR registers upon Hot-reset. > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > --- > V2: > - Reset the statistic of IB/OB windows configured. > - Change the type of member 'resources' to pointer to record the parsed > resources for re-init the outbound windows. > > .../controller/mobiveil/pcie-mobiveil-host.c | 32 +++++++++++-------- > .../pci/controller/mobiveil/pcie-mobiveil.h | 3 +- > 2 files changed, 20 insertions(+), 15 deletions(-) > > diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c > b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c > index d028cdf31d0e..c85f00d3cfcf 100644 > --- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c > +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c > @@ -217,7 +217,7 @@ static void mobiveil_pcie_enable_msi(struct > mobiveil_pcie *pcie) > writel_relaxed(1, pcie->apb_csr_base + MSI_ENABLE_OFFSET); } > > -static int mobiveil_host_init(struct mobiveil_pcie *pcie) > +int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit) > { > u32 value, pab_ctrl, type; > struct resource_entry *win; > @@ -229,11 +229,16 @@ static int mobiveil_host_init(struct mobiveil_pcie > *pcie) > for (i = 0; i < pcie->ppio_wins; i++) > mobiveil_pcie_disable_ib_win(pcie, i); > > - /* setup bus numbers */ > - value = csr_readl(pcie, PCI_PRIMARY_BUS); > - value &= 0xff000000; > - value |= 0x00ff0100; > - csr_writel(pcie, value, PCI_PRIMARY_BUS); > + pcie->ib_wins_configured = 0; > + pcie->ob_wins_configured = 0; > + > + if (!reinit) { > + /* setup bus numbers */ > + value = csr_readl(pcie, PCI_PRIMARY_BUS); > + value &= 0xff000000; > + value |= 0x00ff0100; > + csr_writel(pcie, value, PCI_PRIMARY_BUS); > + } > > /* > * program Bus Master Enable Bit in Command Register in PAB Config > @@ -279,7 +284,7 @@ static int mobiveil_host_init(struct mobiveil_pcie > *pcie) > program_ib_windows(pcie, WIN_NUM_0, 0, 0, > MEM_WINDOW_TYPE, IB_WIN_SIZE); > > /* Get the I/O and memory ranges from DT */ > - resource_list_for_each_entry(win, &pcie->resources) { > + resource_list_for_each_entry(win, pcie->resources) { > if (resource_type(win->res) == IORESOURCE_MEM) { > type = MEM_WINDOW_TYPE; > } else if (resource_type(win->res) == IORESOURCE_IO) { @@ - > 550,8 +555,6 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie) > resource_size_t iobase; > int ret; > > - INIT_LIST_HEAD(&pcie->resources); > - > ret = mobiveil_pcie_parse_dt(pcie); > if (ret) { > dev_err(dev, "Parsing DT failed, ret: %x\n", ret); @@ -565,17 > +568,19 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie) > > /* parse the host bridge base addresses from the device tree file */ > ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, > - &pcie->resources, &iobase); > + &bridge->windows, > &iobase); > if (ret) { > dev_err(dev, "Getting bridge resources failed\n"); > return ret; > } > > + pcie->resources = &bridge->windows; > + > /* > * configure all inbound and outbound windows and prepare the RC > for > * config access > */ > - ret = mobiveil_host_init(pcie); > + ret = mobiveil_host_init(pcie, false); > if (ret) { > dev_err(dev, "Failed to initialize host\n"); > goto error; > @@ -587,12 +592,11 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie > *pcie) > goto error; > } > > - ret = devm_request_pci_bus_resources(dev, &pcie->resources); > + ret = devm_request_pci_bus_resources(dev, pcie->resources); > if (ret) > goto error; > > /* Initialize bridge */ > - list_splice_init(&pcie->resources, &bridge->windows); > bridge->dev.parent = dev; > bridge->sysdata = pcie; > bridge->busnr = pcie->rp.root_bus_nr; > @@ -619,6 +623,6 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie > *pcie) > > return 0; > error: > - pci_free_resource_list(&pcie->resources); > + pci_free_resource_list(pcie->resources); > return ret; > } > diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h > b/drivers/pci/controller/mobiveil/pcie-mobiveil.h > index 933c2f34bc52..0f5303962e88 100644 > --- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h > +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h > @@ -152,7 +152,7 @@ struct mobiveil_pab_ops { > > struct mobiveil_pcie { > struct platform_device *pdev; > - struct list_head resources; > + struct list_head *resources; > void __iomem *csr_axi_slave_base; /* PAB registers base */ > phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */ > void __iomem *apb_csr_base; /* MSI register base */ > @@ -165,6 +165,7 @@ struct mobiveil_pcie { }; > > int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie); > +int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit); > bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie); int > mobiveil_bringup_link(struct mobiveil_pcie *pcie); void > program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 > cpu_addr, > -- > 2.17.1
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c index d028cdf31d0e..c85f00d3cfcf 100644 --- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c @@ -217,7 +217,7 @@ static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie) writel_relaxed(1, pcie->apb_csr_base + MSI_ENABLE_OFFSET); } -static int mobiveil_host_init(struct mobiveil_pcie *pcie) +int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit) { u32 value, pab_ctrl, type; struct resource_entry *win; @@ -229,11 +229,16 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie) for (i = 0; i < pcie->ppio_wins; i++) mobiveil_pcie_disable_ib_win(pcie, i); - /* setup bus numbers */ - value = csr_readl(pcie, PCI_PRIMARY_BUS); - value &= 0xff000000; - value |= 0x00ff0100; - csr_writel(pcie, value, PCI_PRIMARY_BUS); + pcie->ib_wins_configured = 0; + pcie->ob_wins_configured = 0; + + if (!reinit) { + /* setup bus numbers */ + value = csr_readl(pcie, PCI_PRIMARY_BUS); + value &= 0xff000000; + value |= 0x00ff0100; + csr_writel(pcie, value, PCI_PRIMARY_BUS); + } /* * program Bus Master Enable Bit in Command Register in PAB Config @@ -279,7 +284,7 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie) program_ib_windows(pcie, WIN_NUM_0, 0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE); /* Get the I/O and memory ranges from DT */ - resource_list_for_each_entry(win, &pcie->resources) { + resource_list_for_each_entry(win, pcie->resources) { if (resource_type(win->res) == IORESOURCE_MEM) { type = MEM_WINDOW_TYPE; } else if (resource_type(win->res) == IORESOURCE_IO) { @@ -550,8 +555,6 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie) resource_size_t iobase; int ret; - INIT_LIST_HEAD(&pcie->resources); - ret = mobiveil_pcie_parse_dt(pcie); if (ret) { dev_err(dev, "Parsing DT failed, ret: %x\n", ret); @@ -565,17 +568,19 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie) /* parse the host bridge base addresses from the device tree file */ ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, - &pcie->resources, &iobase); + &bridge->windows, &iobase); if (ret) { dev_err(dev, "Getting bridge resources failed\n"); return ret; } + pcie->resources = &bridge->windows; + /* * configure all inbound and outbound windows and prepare the RC for * config access */ - ret = mobiveil_host_init(pcie); + ret = mobiveil_host_init(pcie, false); if (ret) { dev_err(dev, "Failed to initialize host\n"); goto error; @@ -587,12 +592,11 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie) goto error; } - ret = devm_request_pci_bus_resources(dev, &pcie->resources); + ret = devm_request_pci_bus_resources(dev, pcie->resources); if (ret) goto error; /* Initialize bridge */ - list_splice_init(&pcie->resources, &bridge->windows); bridge->dev.parent = dev; bridge->sysdata = pcie; bridge->busnr = pcie->rp.root_bus_nr; @@ -619,6 +623,6 @@ int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie) return 0; error: - pci_free_resource_list(&pcie->resources); + pci_free_resource_list(pcie->resources); return ret; } diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h index 933c2f34bc52..0f5303962e88 100644 --- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h @@ -152,7 +152,7 @@ struct mobiveil_pab_ops { struct mobiveil_pcie { struct platform_device *pdev; - struct list_head resources; + struct list_head *resources; void __iomem *csr_axi_slave_base; /* PAB registers base */ phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */ void __iomem *apb_csr_base; /* MSI register base */ @@ -165,6 +165,7 @@ struct mobiveil_pcie { }; int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie); +int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit); bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie); int mobiveil_bringup_link(struct mobiveil_pcie *pcie); void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,