drm/xe: Add device flag to indicate SR-IOV support

The Single Root I/O Virtualization (SR-IOV) extension to
the PCI Express (PCIe) specification suite is supported
starting from 12th generation of Intel Graphics processors.

Add a device flag that we will use to enable SR-IOV specific
code paths and to indicate our readiness to support SR-IOV.

We will enable this flag for the specific platforms once all
required changes and additions will be ready and merged.

Bspec: 52391
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231115073804.1861-1-michal.wajdeczko@intel.com
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_device.h b/drivers/gpu/drm/xe/xe_device.h
index c4232de40ae0824eb9dc7488d1248a7e4a7dd3e9..54694f98c91a23e14473d79552a1ce3c8d7a1e12 100644 (file)
--- a/drivers/gpu/drm/xe/xe_device.h
+++ b/drivers/gpu/drm/xe/xe_device.h
@@ -158,6 +158,11 @@ static inline bool xe_device_has_flat_ccs(struct xe_device *xe)
        return xe->info.has_flat_ccs;
 }
 
+static inline bool xe_device_has_sriov(struct xe_device *xe)
+{
+       return xe->info.has_sriov;
+}
+
 u32 xe_device_ccs_bytes(struct xe_device *xe, u64 size);
 
 #endif

diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index be11cadccbd44a38960d644fc557cdcd6be25de4..f2ba4f746fa22811bccfddfc57c527cc0376d034 100644 (file)
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -253,6 +253,8 @@ struct xe_device {
                u8 has_llc:1;
                /** @has_range_tlb_invalidation: Has range based TLB invalidations */
                u8 has_range_tlb_invalidation:1;
+               /** @has_sriov: Supports SR-IOV */
+               u8 has_sriov:1;
                /** @enable_display: display enabled */
                u8 enable_display:1;
                /** @bypass_mtcfg: Bypass Multi-Tile configuration from MTCFG register */

diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c
index 097b685981912e1c0cdbddff6b47bf45abd1e0db..0a4b83a9fc0b7f8c3bd1485502e18352cb8cd789 100644 (file)
--- a/drivers/gpu/drm/xe/xe_pci.c
+++ b/drivers/gpu/drm/xe/xe_pci.c
@@ -60,6 +60,7 @@ struct xe_device_desc {
        u8 has_heci_gscfi:1;
 
        u8 has_llc:1;
+       u8 has_sriov:1;
        u8 bypass_mtcfg:1;
        u8 supports_mmio_ext:1;
 };
@@ -531,7 +532,6 @@ static void handle_gmdid(struct xe_device *xe,
        }
 }
 
-
 static int xe_info_init(struct xe_device *xe,
                        const struct xe_device_desc *desc,
                        const struct xe_subplatform_desc *subplatform_desc)
@@ -577,6 +577,7 @@ static int xe_info_init(struct xe_device *xe,
        xe->info.graphics_name = graphics_desc->name;
        xe->info.media_name = media_desc ? media_desc->name : "none";
        xe->info.has_llc = desc->has_llc;
+       xe->info.has_sriov = desc->has_sriov;
        xe->info.bypass_mtcfg = desc->bypass_mtcfg;
        xe->info.supports_mmio_ext = desc->supports_mmio_ext;
        xe->info.tile_mmio_ext_size = graphics_desc->tile_mmio_ext_size;