| Message ID | 0d4157f3446a974cc69005b9ea0d5b1716e78f41.1633340795.git.rahul.singh@arm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | PCI devices passthrough on Arm | expand |
On Mon, 4 Oct 2021, Rahul Singh wrote: > From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> > > Add support for Xilinx ZynqMP PCI host controller to map the PCI config > space to the XEN memory. > > Patch helps to understand how the generic infrastructure for PCI > host-bridge discovery will be used for future references. > > Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> > Signed-off-by: Rahul Singh <rahul.singh@arm.com> > Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> > --- > Change in v4: > - Add __initconstrel and __init for struct and functions > - Added Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com> > Change in v3: > - nwl_cfg_reg_index(..) as static function > - Add support for pci_host_generic_probe() > Change in v2: > - Add more info in commit msg > --- > --- > xen/arch/arm/pci/Makefile | 1 + > xen/arch/arm/pci/pci-host-zynqmp.c | 65 ++++++++++++++++++++++++++++++ > 2 files changed, 66 insertions(+) > create mode 100644 xen/arch/arm/pci/pci-host-zynqmp.c > > diff --git a/xen/arch/arm/pci/Makefile b/xen/arch/arm/pci/Makefile > index 6f32fbbe67..1d045ade01 100644 > --- a/xen/arch/arm/pci/Makefile > +++ b/xen/arch/arm/pci/Makefile > @@ -3,3 +3,4 @@ obj-y += pci-access.o > obj-y += pci-host-generic.o > obj-y += pci-host-common.o > obj-y += ecam.o > +obj-y += pci-host-zynqmp.o > diff --git a/xen/arch/arm/pci/pci-host-zynqmp.c b/xen/arch/arm/pci/pci-host-zynqmp.c > new file mode 100644 > index 0000000000..61a9807d3d > --- /dev/null > +++ b/xen/arch/arm/pci/pci-host-zynqmp.c > @@ -0,0 +1,65 @@ > +/* > + * Based on Linux drivers/pci/controller/pci-host-common.c > + * Based on Linux drivers/pci/controller/pci-host-generic.c > + * Based on xen/arch/arm/pci/pci-host-generic.c > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program. If not, see <http://www.gnu.org/licenses/>. > + */ > + > +#include <xen/init.h> > +#include <xen/pci.h> > +#include <asm/device.h> > +#include <asm/pci.h> > + > +static int __init nwl_cfg_reg_index(struct dt_device_node *np) > +{ > + return dt_property_match_string(np, "reg-names", "cfg"); > +} > + > +/* ECAM ops */ > +const struct pci_ecam_ops nwl_pcie_ops = { > + .bus_shift = 20, > + .cfg_reg_index = nwl_cfg_reg_index, > + .pci_ops = { > + .map_bus = pci_ecam_map_bus, > + .read = pci_generic_config_read, > + .write = pci_generic_config_write, > + } > +}; > + > +static const struct dt_device_match __initconstrel nwl_pcie_dt_match[] = > +{ > + { .compatible = "xlnx,nwl-pcie-2.11" }, > + { }, > +}; > + > +static int __init pci_host_generic_probe(struct dt_device_node *dev, > + const void *data) > +{ > + return pci_host_common_probe(dev, &nwl_pcie_ops); > +} > + > +DT_DEVICE_START(pci_gen, "PCI HOST ZYNQMP", DEVICE_PCI) > +.dt_match = nwl_pcie_dt_match, > +.init = pci_host_generic_probe, > +DT_DEVICE_END > + > +/* > + * Local variables: > + * mode: C > + * c-file-style: "BSD" > + * c-basic-offset: 4 > + * tab-width: 4 > + * indent-tabs-mode: nil > + * End: > + */ > -- > 2.25.1 >
diff --git a/xen/arch/arm/pci/Makefile b/xen/arch/arm/pci/Makefile index 6f32fbbe67..1d045ade01 100644 --- a/xen/arch/arm/pci/Makefile +++ b/xen/arch/arm/pci/Makefile @@ -3,3 +3,4 @@ obj-y += pci-access.o obj-y += pci-host-generic.o obj-y += pci-host-common.o obj-y += ecam.o +obj-y += pci-host-zynqmp.o diff --git a/xen/arch/arm/pci/pci-host-zynqmp.c b/xen/arch/arm/pci/pci-host-zynqmp.c new file mode 100644 index 0000000000..61a9807d3d --- /dev/null +++ b/xen/arch/arm/pci/pci-host-zynqmp.c @@ -0,0 +1,65 @@ +/* + * Based on Linux drivers/pci/controller/pci-host-common.c + * Based on Linux drivers/pci/controller/pci-host-generic.c + * Based on xen/arch/arm/pci/pci-host-generic.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <xen/init.h> +#include <xen/pci.h> +#include <asm/device.h> +#include <asm/pci.h> + +static int __init nwl_cfg_reg_index(struct dt_device_node *np) +{ + return dt_property_match_string(np, "reg-names", "cfg"); +} + +/* ECAM ops */ +const struct pci_ecam_ops nwl_pcie_ops = { + .bus_shift = 20, + .cfg_reg_index = nwl_cfg_reg_index, + .pci_ops = { + .map_bus = pci_ecam_map_bus, + .read = pci_generic_config_read, + .write = pci_generic_config_write, + } +}; + +static const struct dt_device_match __initconstrel nwl_pcie_dt_match[] = +{ + { .compatible = "xlnx,nwl-pcie-2.11" }, + { }, +}; + +static int __init pci_host_generic_probe(struct dt_device_node *dev, + const void *data) +{ + return pci_host_common_probe(dev, &nwl_pcie_ops); +} + +DT_DEVICE_START(pci_gen, "PCI HOST ZYNQMP", DEVICE_PCI) +.dt_match = nwl_pcie_dt_match, +.init = pci_host_generic_probe, +DT_DEVICE_END + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */