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.comSigned-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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

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 */

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;