drm/xe: Add has_asid to device info

Rather than alias supports_usm to ASIS support, add an explicit
variable to indicate ASID support.
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>

drivers/gpu/drm/xe/xe_device_types.h

@@ -81,6 +81,8 @@ struct xe_device {
 		u8 media_ver;
 		/** @supports_usm: Supports unified shared memory */
 		bool supports_usm;
+		/** @has_asid: Has address space ID */
+		bool has_asid;
 		/** @enable_guc: GuC submission enabled */
 		bool enable_guc;
 		/** @has_flat_ccs: Whether flat CCS metadata is used */

drivers/gpu/drm/xe/xe_lrc.c

@@ -682,14 +682,14 @@ int xe_lrc_init(struct xe_lrc *lrc, struct xe_hw_engine *hwe,
 	xe_lrc_write_ctx_reg(lrc, CTX_RING_TAIL, lrc->ring.tail);
 	xe_lrc_write_ctx_reg(lrc, CTX_RING_CTL,
 			     RING_CTL_SIZE(lrc->ring.size) | RING_VALID);
-	if (xe->info.supports_usm && vm) {
+	if (xe->info.has_asid && vm)
 		xe_lrc_write_ctx_reg(lrc, PVC_CTX_ASID,
 				     (e->usm.acc_granularity <<
 				      ACC_GRANULARITY_S) | vm->usm.asid);
+	if (xe->info.supports_usm && vm)
 		xe_lrc_write_ctx_reg(lrc, PVC_CTX_ACC_CTR_THOLD,
 				     (e->usm.acc_notify << ACC_NOTIFY_S) |
 				     e->usm.acc_trigger);
-	}
 
 	lrc->desc = GEN8_CTX_VALID;
 	lrc->desc |= INTEL_LEGACY_64B_CONTEXT << GEN8_CTX_ADDRESSING_MODE_SHIFT;

drivers/gpu/drm/xe/xe_pci.c

@@ -71,6 +71,7 @@ struct xe_device_desc {
 	bool has_flat_ccs;
 	bool has_4tile;
 	bool has_range_tlb_invalidation;
+	bool has_asid;
 };
 
 #define PLATFORM(x)		\
@@ -225,6 +226,7 @@ static const __maybe_unused struct xe_device_desc pvc_desc = {
 	.max_tiles = 2,
 	.vm_max_level = 4,
 	.supports_usm = true,
+	.has_asid = true,
 };
 
 #define MTL_MEDIA_ENGINES \
@@ -408,6 +410,7 @@ static int xe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	xe->info.vm_max_level = desc->vm_max_level;
 	xe->info.media_ver = desc->media_ver;
 	xe->info.supports_usm = desc->supports_usm;
+	xe->info.has_asid = desc->has_asid;
 	xe->info.has_flat_ccs = desc->has_flat_ccs;
 	xe->info.has_4tile = desc->has_4tile;
 	xe->info.has_range_tlb_invalidation = desc->has_range_tlb_invalidation;

drivers/gpu/drm/xe/xe_vm.c

@@ -1429,7 +1429,7 @@ static void vm_destroy_work_func(struct work_struct *w)
 		xe_device_mem_access_put(xe);
 		xe_pm_runtime_put(xe);
 
-		if (xe->info.supports_usm) {
+		if (xe->info.has_asid) {
 			mutex_lock(&xe->usm.lock);
 			lookup = xa_erase(&xe->usm.asid_to_vm, vm->usm.asid);
 			XE_WARN_ON(lookup != vm);
@@ -1926,7 +1926,7 @@ int xe_vm_create_ioctl(struct drm_device *dev, void *data,
 		return err;
 	}
 
-	if (xe->info.supports_usm) {
+	if (xe->info.has_asid) {
 		mutex_lock(&xe->usm.lock);
 		err = xa_alloc_cyclic(&xe->usm.asid_to_vm, &asid, vm,
 				      XA_LIMIT(0, XE_MAX_ASID - 1),