From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Date: Thu, 12 Jan 2023 22:25:17 +0000 (-0500)
Subject: drm/xe: Implement stolen memory.
X-Git-Tag: v6.8-rc1~21^2~13^2~1000
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d8b52a02cb40fe355374e8b0b89763fefc697b53;p=linux-2.6-block.git

drm/xe: Implement stolen memory.

This adds support for stolen memory, with the same allocator as
vram_mgr. This allows us to skip a whole lot of copy-paste,
by re-using parts of xe_ttm_vram_mgr.

The stolen memory may be bound using VM_BIND, so it performs like any
other memory region.

We should be able to map a stolen BO directly using the physical memory
location instead of through GGTT even on old platforms, but I don't know
what the effects are on coherency.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---

diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index 228a87f2fe7b..f8da32b550bc 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -93,6 +93,7 @@ xe-y += xe_bb.o \
 	xe_sync.o \
 	xe_trace.o \
 	xe_ttm_gtt_mgr.o \
+	xe_ttm_stolen_mgr.o \
 	xe_ttm_vram_mgr.o \
 	xe_tuning.o \
 	xe_uc.o \
diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index ef2c9196c113..f07d1cd63fdd 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -24,6 +24,7 @@
 #include "xe_preempt_fence.h"
 #include "xe_res_cursor.h"
 #include "xe_trace.h"
+#include "xe_ttm_stolen_mgr.h"
 #include "xe_vm.h"
 
 static const struct ttm_place sys_placement_flags = {
@@ -42,7 +43,12 @@ static struct ttm_placement sys_placement = {
 
 bool mem_type_is_vram(u32 mem_type)
 {
-	return mem_type >= XE_PL_VRAM0;
+	return mem_type >= XE_PL_VRAM0 && mem_type != XE_PL_STOLEN;
+}
+
+static bool resource_is_stolen_vram(struct xe_device *xe, struct ttm_resource *res)
+{
+	return res->mem_type == XE_PL_STOLEN && IS_DGFX(xe);
 }
 
 static bool resource_is_vram(struct ttm_resource *res)
@@ -52,7 +58,13 @@ static bool resource_is_vram(struct ttm_resource *res)
 
 bool xe_bo_is_vram(struct xe_bo *bo)
 {
-	return resource_is_vram(bo->ttm.resource);
+	return resource_is_vram(bo->ttm.resource) ||
+		resource_is_stolen_vram(xe_bo_device(bo), bo->ttm.resource);
+}
+
+bool xe_bo_is_stolen(struct xe_bo *bo)
+{
+	return bo->ttm.resource->mem_type == XE_PL_STOLEN;
 }
 
 static bool xe_bo_is_user(struct xe_bo *bo)
@@ -63,9 +75,9 @@ static bool xe_bo_is_user(struct xe_bo *bo)
 static struct xe_gt *
 mem_type_to_gt(struct xe_device *xe, u32 mem_type)
 {
-	XE_BUG_ON(!mem_type_is_vram(mem_type));
+	XE_BUG_ON(mem_type != XE_PL_STOLEN && !mem_type_is_vram(mem_type));
 
-	return xe_device_get_gt(xe, mem_type - XE_PL_VRAM0);
+	return xe_device_get_gt(xe, mem_type == XE_PL_STOLEN ? 0 : (mem_type - XE_PL_VRAM0));
 }
 
 static void try_add_system(struct xe_bo *bo, struct ttm_place *places,
@@ -134,6 +146,20 @@ static void try_add_vram1(struct xe_device *xe, struct xe_bo *bo,
 	}
 }
 
+static void try_add_stolen(struct xe_device *xe, struct xe_bo *bo,
+			   struct ttm_place *places, u32 bo_flags, u32 *c)
+{
+	if (bo_flags & XE_BO_CREATE_STOLEN_BIT) {
+		places[*c] = (struct ttm_place) {
+			.mem_type = XE_PL_STOLEN,
+			.flags = bo_flags & (XE_BO_CREATE_PINNED_BIT |
+					     XE_BO_CREATE_GGTT_BIT) ?
+				TTM_PL_FLAG_CONTIGUOUS : 0,
+		};
+		*c += 1;
+	}
+}
+
 static int __xe_bo_placement_for_flags(struct xe_device *xe, struct xe_bo *bo,
 				       u32 bo_flags)
 {
@@ -162,6 +188,7 @@ static int __xe_bo_placement_for_flags(struct xe_device *xe, struct xe_bo *bo,
 		try_add_vram1(xe, bo, places, bo_flags, &c);
 		try_add_system(bo, places, bo_flags, &c);
 	}
+	try_add_stolen(xe, bo, places, bo_flags, &c);
 
 	if (!c)
 		return -EINVAL;
@@ -209,6 +236,7 @@ static void xe_evict_flags(struct ttm_buffer_object *tbo,
 	switch (tbo->resource->mem_type) {
 	case XE_PL_VRAM0:
 	case XE_PL_VRAM1:
+	case XE_PL_STOLEN:
 	case XE_PL_TT:
 	default:
 		/* for now kick out to system */
@@ -362,11 +390,12 @@ static int xe_ttm_io_mem_reserve(struct ttm_device *bdev,
 #if  !defined(CONFIG_X86)
 		mem->bus.caching = ttm_write_combined;
 #endif
-		break;
+		return 0;
+	case XE_PL_STOLEN:
+		return xe_ttm_stolen_io_mem_reserve(xe, mem);
 	default:
 		return -EINVAL;
 	}
-	return 0;
 }
 
 static int xe_bo_trigger_rebind(struct xe_device *xe, struct xe_bo *bo,
@@ -673,14 +702,18 @@ out:
 
 }
 
-static unsigned long xe_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
+static unsigned long xe_ttm_io_mem_pfn(struct ttm_buffer_object *ttm_bo,
 				       unsigned long page_offset)
 {
-	struct xe_device *xe = ttm_to_xe_device(bo->bdev);
-	struct xe_gt *gt = mem_type_to_gt(xe, bo->resource->mem_type);
+	struct xe_device *xe = ttm_to_xe_device(ttm_bo->bdev);
+	struct xe_bo *bo = ttm_to_xe_bo(ttm_bo);
+	struct xe_gt *gt = mem_type_to_gt(xe, ttm_bo->resource->mem_type);
 	struct xe_res_cursor cursor;
 
-	xe_res_first(bo->resource, (u64)page_offset << PAGE_SHIFT, 0, &cursor);
+	if (ttm_bo->resource->mem_type == XE_PL_STOLEN)
+		return xe_ttm_stolen_io_offset(bo, page_offset << PAGE_SHIFT) >> PAGE_SHIFT;
+
+	xe_res_first(ttm_bo->resource, (u64)page_offset << PAGE_SHIFT, 0, &cursor);
 	return (gt->mem.vram.io_start + cursor.start) >> PAGE_SHIFT;
 }
 
@@ -945,7 +978,8 @@ struct xe_bo *__xe_bo_create_locked(struct xe_device *xe, struct xe_bo *bo,
 			return bo;
 	}
 
-	if (flags & (XE_BO_CREATE_VRAM0_BIT | XE_BO_CREATE_VRAM1_BIT) &&
+	if (flags & (XE_BO_CREATE_VRAM0_BIT | XE_BO_CREATE_VRAM1_BIT |
+		     XE_BO_CREATE_STOLEN_BIT) &&
 	    !(flags & XE_BO_CREATE_IGNORE_MIN_PAGE_SIZE_BIT) &&
 	    xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K) {
 		size = ALIGN(size, SZ_64K);
@@ -973,9 +1007,11 @@ struct xe_bo *__xe_bo_create_locked(struct xe_device *xe, struct xe_bo *bo,
 		ctx.resv = resv;
 	}
 
-	err = __xe_bo_placement_for_flags(xe, bo, bo->flags);
-	if (WARN_ON(err))
-		return ERR_PTR(err);
+	if (!(flags & XE_BO_FIXED_PLACEMENT_BIT)) {
+		err = __xe_bo_placement_for_flags(xe, bo, bo->flags);
+		if (WARN_ON(err))
+			return ERR_PTR(err);
+	}
 
 	/* Defer populating type_sg bos */
 	placement = (type == ttm_bo_type_sg ||
@@ -993,16 +1029,73 @@ struct xe_bo *__xe_bo_create_locked(struct xe_device *xe, struct xe_bo *bo,
 	return bo;
 }
 
-struct xe_bo *xe_bo_create_locked(struct xe_device *xe, struct xe_gt *gt,
-				  struct xe_vm *vm, size_t size,
-				  enum ttm_bo_type type, u32 flags)
+static int __xe_bo_fixed_placement(struct xe_device *xe,
+				   struct xe_bo *bo,
+				   u32 flags,
+				   u64 start, u64 end, u64 size)
 {
-	struct xe_bo *bo;
+	struct ttm_place *place = bo->placements;
+
+	if (flags & (XE_BO_CREATE_USER_BIT|XE_BO_CREATE_SYSTEM_BIT))
+		return -EINVAL;
+
+	place->flags = TTM_PL_FLAG_CONTIGUOUS;
+	place->fpfn = start >> PAGE_SHIFT;
+	place->lpfn = end >> PAGE_SHIFT;
+
+	switch (flags & (XE_BO_CREATE_STOLEN_BIT |
+		XE_BO_CREATE_VRAM0_BIT |XE_BO_CREATE_VRAM1_BIT)) {
+	case XE_BO_CREATE_VRAM0_BIT:
+		place->mem_type = XE_PL_VRAM0;
+		break;
+	case XE_BO_CREATE_VRAM1_BIT:
+		place->mem_type = XE_PL_VRAM1;
+		break;
+	case XE_BO_CREATE_STOLEN_BIT:
+		place->mem_type = XE_PL_STOLEN;
+		break;
+
+	default:
+		/* 0 or multiple of the above set */
+		return -EINVAL;
+	}
+
+	bo->placement = (struct ttm_placement) {
+		.num_placement = 1,
+		.placement = place,
+		.num_busy_placement = 1,
+		.busy_placement = place,
+	};
+
+	return 0;
+}
+
+struct xe_bo *
+xe_bo_create_locked_range(struct xe_device *xe,
+			  struct xe_gt *gt, struct xe_vm *vm,
+			  size_t size, u64 start, u64 end,
+			  enum ttm_bo_type type, u32 flags)
+{
+	struct xe_bo *bo = NULL;
 	int err;
 
 	if (vm)
 		xe_vm_assert_held(vm);
-	bo = __xe_bo_create_locked(xe, NULL, gt, vm ? &vm->resv : NULL, size,
+
+	if (start || end != ~0ULL) {
+		bo = xe_bo_alloc();
+		if (IS_ERR(bo))
+			return bo;
+
+		flags |= XE_BO_FIXED_PLACEMENT_BIT;
+		err = __xe_bo_fixed_placement(xe, bo, flags, start, end, size);
+		if (err) {
+			xe_bo_free(bo);
+			return ERR_PTR(err);
+		}
+	}
+
+	bo = __xe_bo_create_locked(xe, bo, gt, vm ? &vm->resv : NULL, size,
 				   type, flags);
 	if (IS_ERR(bo))
 		return bo;
@@ -1011,7 +1104,10 @@ struct xe_bo *xe_bo_create_locked(struct xe_device *xe, struct xe_gt *gt,
 		xe_vm_get(vm);
 	bo->vm = vm;
 
-	if (flags & XE_BO_CREATE_GGTT_BIT) {
+	if (bo->flags & XE_BO_CREATE_GGTT_BIT) {
+		if (!gt && flags & XE_BO_CREATE_STOLEN_BIT)
+			gt = xe_device_get_gt(xe, 0);
+
 		XE_BUG_ON(!gt);
 
 		err = xe_ggtt_insert_bo(gt->mem.ggtt, bo);
@@ -1027,6 +1123,13 @@ err_unlock_put_bo:
 	return ERR_PTR(err);
 }
 
+struct xe_bo *xe_bo_create_locked(struct xe_device *xe, struct xe_gt *gt,
+				  struct xe_vm *vm, size_t size,
+				  enum ttm_bo_type type, u32 flags)
+{
+	return xe_bo_create_locked_range(xe, gt, vm, size, 0, ~0ULL, type, flags);
+}
+
 struct xe_bo *xe_bo_create(struct xe_device *xe, struct xe_gt *gt,
 			   struct xe_vm *vm, size_t size,
 			   enum ttm_bo_type type, u32 flags)
@@ -1039,13 +1142,21 @@ struct xe_bo *xe_bo_create(struct xe_device *xe, struct xe_gt *gt,
 	return bo;
 }
 
-struct xe_bo *xe_bo_create_pin_map(struct xe_device *xe, struct xe_gt *gt,
-				   struct xe_vm *vm, size_t size,
-				   enum ttm_bo_type type, u32 flags)
+struct xe_bo *xe_bo_create_pin_map_at(struct xe_device *xe, struct xe_gt *gt,
+				      struct xe_vm *vm,
+				      size_t size, u64 offset,
+				      enum ttm_bo_type type, u32 flags)
 {
-	struct xe_bo *bo = xe_bo_create_locked(xe, gt, vm, size, type, flags);
+	struct xe_bo *bo;
 	int err;
+	u64 start = offset == ~0ull ? 0 : offset;
+	u64 end = offset == ~0ull ? offset : start + size;
+
+	if (flags & XE_BO_CREATE_STOLEN_BIT &&
+	    xe_ttm_stolen_inaccessible(xe))
+		flags |= XE_BO_CREATE_GGTT_BIT;
 
+	bo = xe_bo_create_locked_range(xe, gt, vm, size, start, end, type, flags);
 	if (IS_ERR(bo))
 		return bo;
 
@@ -1069,6 +1180,13 @@ err_put:
 	return ERR_PTR(err);
 }
 
+struct xe_bo *xe_bo_create_pin_map(struct xe_device *xe, struct xe_gt *gt,
+				   struct xe_vm *vm, size_t size,
+				   enum ttm_bo_type type, u32 flags)
+{
+	return xe_bo_create_pin_map_at(xe, gt, vm, size, ~0ull, type, flags);
+}
+
 struct xe_bo *xe_bo_create_from_data(struct xe_device *xe, struct xe_gt *gt,
 				     const void *data, size_t size,
 				     enum ttm_bo_type type, u32 flags)
@@ -1093,6 +1211,9 @@ static uint64_t vram_region_io_offset(struct xe_bo *bo)
 	struct xe_device *xe = xe_bo_device(bo);
 	struct xe_gt *gt = mem_type_to_gt(xe, bo->ttm.resource->mem_type);
 
+	if (bo->ttm.resource->mem_type == XE_PL_STOLEN)
+		return xe_ttm_stolen_gpu_offset(xe);
+
 	return gt->mem.vram.io_start - xe->mem.vram.io_start;
 }
 
@@ -1174,7 +1295,7 @@ int xe_bo_pin(struct xe_bo *bo)
 		bool lmem;
 
 		XE_BUG_ON(!(place->flags & TTM_PL_FLAG_CONTIGUOUS));
-		XE_BUG_ON(!mem_type_is_vram(place->mem_type));
+		XE_BUG_ON(!mem_type_is_vram(place->mem_type) && place->mem_type != XE_PL_STOLEN);
 
 		place->fpfn = (xe_bo_addr(bo, 0, PAGE_SIZE, &lmem) -
 			       vram_region_io_offset(bo)) >> PAGE_SHIFT;
@@ -1305,7 +1426,7 @@ dma_addr_t xe_bo_addr(struct xe_bo *bo, u64 offset,
 
 	*is_lmem = xe_bo_is_vram(bo);
 
-	if (!*is_lmem) {
+	if (!*is_lmem && !xe_bo_is_stolen(bo)) {
 		XE_BUG_ON(!bo->ttm.ttm);
 
 		xe_res_first_sg(xe_bo_get_sg(bo), page << PAGE_SHIFT,
diff --git a/drivers/gpu/drm/xe/xe_bo.h b/drivers/gpu/drm/xe/xe_bo.h
index 1a49c0a3c4c6..8d8a3332dbc8 100644
--- a/drivers/gpu/drm/xe/xe_bo.h
+++ b/drivers/gpu/drm/xe/xe_bo.h
@@ -12,8 +12,9 @@
 
 #define XE_DEFAULT_GTT_SIZE_MB          3072ULL /* 3GB by default */
 
-#define XE_BO_CREATE_USER_BIT		BIT(1)
-#define XE_BO_CREATE_SYSTEM_BIT		BIT(2)
+#define XE_BO_CREATE_USER_BIT		BIT(0)
+#define XE_BO_CREATE_SYSTEM_BIT		BIT(1)
+#define XE_BO_CREATE_STOLEN_BIT		BIT(2)
 #define XE_BO_CREATE_VRAM0_BIT		BIT(3)
 #define XE_BO_CREATE_VRAM1_BIT		BIT(4)
 #define XE_BO_CREATE_VRAM_IF_DGFX(gt) \
@@ -24,6 +25,7 @@
 #define XE_BO_CREATE_PINNED_BIT		BIT(7)
 #define XE_BO_DEFER_BACKING		BIT(8)
 #define XE_BO_SCANOUT_BIT		BIT(9)
+#define XE_BO_FIXED_PLACEMENT_BIT	BIT(10)
 /* this one is trigger internally only */
 #define XE_BO_INTERNAL_TEST		BIT(30)
 #define XE_BO_INTERNAL_64K		BIT(31)
@@ -64,6 +66,7 @@
 #define XE_PL_TT		TTM_PL_TT
 #define XE_PL_VRAM0		TTM_PL_VRAM
 #define XE_PL_VRAM1		(XE_PL_VRAM0 + 1)
+#define XE_PL_STOLEN		(TTM_NUM_MEM_TYPES - 1)
 
 #define XE_BO_PROPS_INVALID	(-1)
 
@@ -76,6 +79,11 @@ struct xe_bo *__xe_bo_create_locked(struct xe_device *xe, struct xe_bo *bo,
 				    struct xe_gt *gt, struct dma_resv *resv,
 				    size_t size, enum ttm_bo_type type,
 				    u32 flags);
+struct xe_bo *
+xe_bo_create_locked_range(struct xe_device *xe,
+			  struct xe_gt *gt, struct xe_vm *vm,
+			  size_t size, u64 start, u64 end,
+			  enum ttm_bo_type type, u32 flags);
 struct xe_bo *xe_bo_create_locked(struct xe_device *xe, struct xe_gt *gt,
 				  struct xe_vm *vm, size_t size,
 				  enum ttm_bo_type type, u32 flags);
@@ -85,6 +93,9 @@ struct xe_bo *xe_bo_create(struct xe_device *xe, struct xe_gt *gt,
 struct xe_bo *xe_bo_create_pin_map(struct xe_device *xe, struct xe_gt *gt,
 				   struct xe_vm *vm, size_t size,
 				   enum ttm_bo_type type, u32 flags);
+struct xe_bo *xe_bo_create_pin_map_at(struct xe_device *xe, struct xe_gt *gt,
+				      struct xe_vm *vm, size_t size, u64 offset,
+				      enum ttm_bo_type type, u32 flags);
 struct xe_bo *xe_bo_create_from_data(struct xe_device *xe, struct xe_gt *gt,
 				     const void *data, size_t size,
 				     enum ttm_bo_type type, u32 flags);
@@ -206,6 +217,7 @@ void xe_bo_vunmap(struct xe_bo *bo);
 
 bool mem_type_is_vram(u32 mem_type);
 bool xe_bo_is_vram(struct xe_bo *bo);
+bool xe_bo_is_stolen(struct xe_bo *bo);
 
 bool xe_bo_can_migrate(struct xe_bo *bo, u32 mem_type);
 
diff --git a/drivers/gpu/drm/xe/xe_debugfs.c b/drivers/gpu/drm/xe/xe_debugfs.c
index 84db7b3f501e..b0f8b157ffa3 100644
--- a/drivers/gpu/drm/xe/xe_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_debugfs.c
@@ -124,6 +124,10 @@ void xe_debugfs_register(struct xe_device *xe)
 	man = ttm_manager_type(bdev, XE_PL_TT);
 	ttm_resource_manager_create_debugfs(man, root, "gtt_mm");
 
+	man = ttm_manager_type(bdev, XE_PL_STOLEN);
+	if (man)
+		ttm_resource_manager_create_debugfs(man, root, "stolen_mm");
+
 	for_each_gt(gt, xe, id)
 		xe_gt_debugfs_register(gt);
 }
diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 93dea2b9c464..104ab12cc2ed 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -25,6 +25,7 @@
 #include "xe_pcode.h"
 #include "xe_pm.h"
 #include "xe_query.h"
+#include "xe_ttm_stolen_mgr.h"
 #include "xe_vm.h"
 #include "xe_vm_madvise.h"
 #include "xe_wait_user_fence.h"
@@ -256,6 +257,9 @@ int xe_device_probe(struct xe_device *xe)
 			goto err_irq_shutdown;
 	}
 
+	/* Allocate and map stolen after potential VRAM resize */
+	xe_ttm_stolen_mgr_init(xe);
+
 	for_each_gt(gt, xe, id) {
 		err = xe_gt_init(gt);
 		if (err)
diff --git a/drivers/gpu/drm/xe/xe_mmio.c b/drivers/gpu/drm/xe/xe_mmio.c
index 42e2405f2f48..54c9362a3050 100644
--- a/drivers/gpu/drm/xe/xe_mmio.c
+++ b/drivers/gpu/drm/xe/xe_mmio.c
@@ -150,6 +150,38 @@ static bool xe_pci_resource_valid(struct pci_dev *pdev, int bar)
 	return true;
 }
 
+int xe_mmio_total_vram_size(struct xe_device *xe, u64 *vram_size, u64 *flat_ccs_base)
+{
+	struct xe_gt *gt = xe_device_get_gt(xe, 0);
+	struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
+	int err;
+	u32 reg;
+
+	if (!xe->info.has_flat_ccs)  {
+		*vram_size = pci_resource_len(pdev, GEN12_LMEM_BAR);
+		if (flat_ccs_base)
+			*flat_ccs_base = *vram_size;
+		return 0;
+	}
+
+	err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
+	if (err)
+		return err;
+
+	reg = xe_gt_mcr_unicast_read_any(gt, XEHP_TILE0_ADDR_RANGE);
+	*vram_size = (u64)REG_FIELD_GET(GENMASK(14, 8), reg) * SZ_1G;
+	if (flat_ccs_base) {
+		reg = xe_gt_mcr_unicast_read_any(gt, XEHP_FLAT_CCS_BASE_ADDR);
+		*flat_ccs_base = (u64)REG_FIELD_GET(GENMASK(31, 8), reg) * SZ_64K;
+	}
+
+	if (flat_ccs_base)
+		drm_info(&xe->drm, "lmem_size: 0x%llx flat_ccs_base: 0x%llx\n",
+			 *vram_size, *flat_ccs_base);
+
+	return xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
+}
+
 int xe_mmio_probe_vram(struct xe_device *xe)
 {
 	struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
@@ -159,7 +191,7 @@ int xe_mmio_probe_vram(struct xe_device *xe)
 	u64 original_size;
 	u64 current_size;
 	u64 flat_ccs_base;
-	int resize_result;
+	int resize_result, err;
 
 	if (!IS_DGFX(xe)) {
 		xe->mem.vram.mapping = 0;
@@ -184,27 +216,9 @@ int xe_mmio_probe_vram(struct xe_device *xe)
 
 	original_size = pci_resource_len(pdev, GEN12_LMEM_BAR);
 
-	if (xe->info.has_flat_ccs)  {
-		int err;
-		u32 reg;
-
-		err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
-		if (err)
-			return err;
-		reg = xe_gt_mcr_unicast_read_any(gt, XEHP_TILE0_ADDR_RANGE);
-		lmem_size = (u64)REG_FIELD_GET(GENMASK(14, 8), reg) * SZ_1G;
-		reg = xe_gt_mcr_unicast_read_any(gt, XEHP_FLAT_CCS_BASE_ADDR);
-		flat_ccs_base = (u64)REG_FIELD_GET(GENMASK(31, 8), reg) * SZ_64K;
-
-		drm_info(&xe->drm, "lmem_size: 0x%llx flat_ccs_base: 0x%llx\n",
-			 lmem_size, flat_ccs_base);
-
-		err = xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
-		if (err)
-			return err;
-	} else {
-		flat_ccs_base = lmem_size;
-	}
+	err = xe_mmio_total_vram_size(xe, &lmem_size, &flat_ccs_base);
+	if (err)
+		return err;
 
 	resize_result = xe_resize_lmem_bar(xe, lmem_size);
 	current_size = pci_resource_len(pdev, GEN12_LMEM_BAR);
diff --git a/drivers/gpu/drm/xe/xe_mmio.h b/drivers/gpu/drm/xe/xe_mmio.h
index adc7d7484afb..a3b144553873 100644
--- a/drivers/gpu/drm/xe/xe_mmio.h
+++ b/drivers/gpu/drm/xe/xe_mmio.h
@@ -130,5 +130,6 @@ static inline bool xe_mmio_in_range(const struct xe_mmio_range *range, u32 reg)
 }
 
 int xe_mmio_probe_vram(struct xe_device *xe);
+int xe_mmio_total_vram_size(struct xe_device *xe, u64 *vram_size, u64 *flat_ccs_base);
 
 #endif
diff --git a/drivers/gpu/drm/xe/xe_pt.c b/drivers/gpu/drm/xe/xe_pt.c
index 81193ddd0af7..45850184650c 100644
--- a/drivers/gpu/drm/xe/xe_pt.c
+++ b/drivers/gpu/drm/xe/xe_pt.c
@@ -12,6 +12,7 @@
 #include "xe_pt_walk.h"
 #include "xe_vm.h"
 #include "xe_res_cursor.h"
+#include "xe_ttm_stolen_mgr.h"
 
 struct xe_pt_dir {
 	struct xe_pt pt;
@@ -756,12 +757,14 @@ xe_pt_stage_bind(struct xe_gt *gt, struct xe_vma *vma,
 		else
 			xe_walk.cache = XE_CACHE_WB;
 	}
+	if (xe_bo_is_stolen(bo))
+		xe_walk.dma_offset = xe_ttm_stolen_gpu_offset(xe_bo_device(bo));
 
 	xe_bo_assert_held(bo);
 	if (xe_vma_is_userptr(vma))
 		xe_res_first_sg(vma->userptr.sg, 0, vma->end - vma->start + 1,
 				&curs);
-	else if (xe_bo_is_vram(bo))
+	else if (xe_bo_is_vram(bo) || xe_bo_is_stolen(bo))
 		xe_res_first(bo->ttm.resource, vma->bo_offset,
 			     vma->end - vma->start + 1, &curs);
 	else
diff --git a/drivers/gpu/drm/xe/xe_res_cursor.h b/drivers/gpu/drm/xe/xe_res_cursor.h
index f54409850d74..365c8ad7aeb8 100644
--- a/drivers/gpu/drm/xe/xe_res_cursor.h
+++ b/drivers/gpu/drm/xe/xe_res_cursor.h
@@ -33,10 +33,11 @@
 #include <drm/ttm/ttm_tt.h>
 
 #include "xe_bo.h"
+#include "xe_device.h"
 #include "xe_macros.h"
 #include "xe_ttm_vram_mgr.h"
 
-/* state back for walking over vram_mgr and gtt_mgr allocations */
+/* state back for walking over vram_mgr, stolen_mgr, and gtt_mgr allocations */
 struct xe_res_cursor {
 	u64 start;
 	u64 size;
@@ -44,8 +45,23 @@ struct xe_res_cursor {
 	void *node;
 	u32 mem_type;
 	struct scatterlist *sgl;
+	struct drm_buddy *mm;
 };
 
+static struct drm_buddy *xe_res_get_buddy(struct ttm_resource *res)
+{
+	struct xe_device *xe = ttm_to_xe_device(res->bo->bdev);
+
+	if (res->mem_type != XE_PL_STOLEN) {
+		return &xe_device_get_gt(xe, res->mem_type - XE_PL_VRAM0)->mem.vram_mgr->mm;
+	} else {
+		struct ttm_resource_manager *mgr =
+			ttm_manager_type(&xe->ttm, XE_PL_STOLEN);
+
+		return &to_xe_ttm_vram_mgr(mgr)->mm;
+	}
+}
+
 /**
  * xe_res_first - initialize a xe_res_cursor
  *
@@ -60,9 +76,6 @@ static inline void xe_res_first(struct ttm_resource *res,
 				u64 start, u64 size,
 				struct xe_res_cursor *cur)
 {
-	struct drm_buddy_block *block;
-	struct list_head *head, *next;
-
 	cur->sgl = NULL;
 	if (!res)
 		goto fallback;
@@ -72,8 +85,13 @@ static inline void xe_res_first(struct ttm_resource *res,
 	cur->mem_type = res->mem_type;
 
 	switch (cur->mem_type) {
+	case XE_PL_STOLEN:
 	case XE_PL_VRAM0:
-	case XE_PL_VRAM1:
+	case XE_PL_VRAM1: {
+		struct drm_buddy_block *block;
+		struct list_head *head, *next;
+		struct drm_buddy *mm = xe_res_get_buddy(res);
+
 		head = &to_xe_ttm_vram_mgr_resource(res)->blocks;
 
 		block = list_first_entry_or_null(head,
@@ -82,8 +100,8 @@ static inline void xe_res_first(struct ttm_resource *res,
 		if (!block)
 			goto fallback;
 
-		while (start >= xe_ttm_vram_mgr_block_size(block)) {
-			start -= xe_ttm_vram_mgr_block_size(block);
+		while (start >= drm_buddy_block_size(mm, block)) {
+			start -= drm_buddy_block_size(mm, block);
 
 			next = block->link.next;
 			if (next != head)
@@ -91,12 +109,14 @@ static inline void xe_res_first(struct ttm_resource *res,
 						   link);
 		}
 
-		cur->start = xe_ttm_vram_mgr_block_start(block) + start;
-		cur->size = min(xe_ttm_vram_mgr_block_size(block) - start,
+		cur->mm = mm;
+		cur->start = drm_buddy_block_offset(block) + start;
+		cur->size = min(drm_buddy_block_size(mm, block) - start,
 				size);
 		cur->remaining = size;
 		cur->node = block;
 		break;
+	}
 	default:
 		goto fallback;
 	}
@@ -188,6 +208,7 @@ static inline void xe_res_next(struct xe_res_cursor *cur, u64 size)
 	}
 
 	switch (cur->mem_type) {
+	case XE_PL_STOLEN:
 	case XE_PL_VRAM0:
 	case XE_PL_VRAM1:
 		start = size - cur->size;
@@ -197,15 +218,15 @@ static inline void xe_res_next(struct xe_res_cursor *cur, u64 size)
 		block = list_entry(next, struct drm_buddy_block, link);
 
 
-		while (start >= xe_ttm_vram_mgr_block_size(block)) {
-			start -= xe_ttm_vram_mgr_block_size(block);
+		while (start >= drm_buddy_block_size(cur->mm, block)) {
+			start -= drm_buddy_block_size(cur->mm, block);
 
 			next = block->link.next;
 			block = list_entry(next, struct drm_buddy_block, link);
 		}
 
-		cur->start = xe_ttm_vram_mgr_block_start(block) + start;
-		cur->size = min(xe_ttm_vram_mgr_block_size(block) - start,
+		cur->start = drm_buddy_block_offset(block) + start;
+		cur->size = min(drm_buddy_block_size(cur->mm, block) - start,
 				cur->remaining);
 		cur->node = block;
 		break;
diff --git a/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c b/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c
new file mode 100644
index 000000000000..21ca7f79e63b
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c
@@ -0,0 +1,244 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021-2022 Intel Corporation
+ * Copyright (C) 2021-2002 Red Hat
+ */
+
+#include <drm/drm_managed.h>
+#include <drm/drm_mm.h>
+
+#include <drm/ttm/ttm_device.h>
+#include <drm/ttm/ttm_range_manager.h>
+#include <drm/ttm/ttm_placement.h>
+
+#include "../i915/i915_reg.h"
+
+#include "xe_bo.h"
+#include "xe_device.h"
+#include "xe_gt.h"
+#include "xe_mmio.h"
+#include "xe_res_cursor.h"
+#include "xe_ttm_stolen_mgr.h"
+#include "xe_ttm_vram_mgr.h"
+
+bool xe_ttm_stolen_inaccessible(struct xe_device *xe)
+{
+	return !IS_DGFX(xe) && GRAPHICS_VERx100(xe) < 1270;
+}
+
+struct xe_ttm_stolen_mgr {
+	struct xe_ttm_vram_mgr base;
+
+	/* PCI base offset */
+	resource_size_t io_base;
+	/* GPU base offset */
+	resource_size_t stolen_base;
+
+	void *__iomem mapping;
+};
+
+static inline struct xe_ttm_stolen_mgr *
+to_stolen_mgr(struct ttm_resource_manager *man)
+{
+	return container_of(man, struct xe_ttm_stolen_mgr, base.manager);
+}
+
+static s64 detect_bar2_dgfx(struct xe_device *xe, struct xe_ttm_stolen_mgr *mgr)
+{
+	struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
+	struct xe_gt *gt = to_gt(xe);
+	u64 vram_size, stolen_size;
+	int err;
+
+	err = xe_mmio_total_vram_size(xe, &vram_size, NULL);
+	if (err) {
+		drm_info(&xe->drm, "Querying total vram size failed\n");
+		return 0;
+	}
+
+	/* Use DSM base address instead for stolen memory */
+	mgr->stolen_base = xe_mmio_read64(gt, GEN12_DSMBASE.reg) & GEN12_BDSM_MASK;
+	if (drm_WARN_ON(&xe->drm, vram_size < mgr->stolen_base))
+		return 0;
+
+	stolen_size = vram_size - mgr->stolen_base;
+	if (mgr->stolen_base + stolen_size <= pci_resource_len(pdev, 2))
+		mgr->io_base = pci_resource_start(pdev, 2) + mgr->stolen_base;
+
+	return stolen_size;
+}
+
+static u32 detect_bar2_integrated(struct xe_device *xe, struct xe_ttm_stolen_mgr *mgr)
+{
+	struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
+	u32 stolen_size;
+	u32 ggc, gms;
+
+	ggc = xe_mmio_read32(to_gt(xe), GGC.reg);
+
+	/* check GGMS, should be fixed 0x3 (8MB) */
+	if (drm_WARN_ON(&xe->drm, (ggc & GGMS_MASK) != GGMS_MASK))
+		return 0;
+
+	mgr->stolen_base = mgr->io_base = pci_resource_start(pdev, 2) + SZ_8M;
+
+	/* return valid GMS value, -EIO if invalid */
+	gms = REG_FIELD_GET(GMS_MASK, ggc);
+	switch (gms) {
+	case 0x0 ... 0x04:
+		stolen_size = gms * 32 * SZ_1M;
+		break;
+	case 0xf0 ... 0xfe:
+		stolen_size = (gms - 0xf0 + 1) * 4 * SZ_1M;
+		break;
+	default:
+		return 0;
+	}
+
+	if (drm_WARN_ON(&xe->drm, stolen_size + SZ_8M > pci_resource_len(pdev, 2)))
+		return 0;
+
+	return stolen_size;
+}
+
+extern struct resource intel_graphics_stolen_res;
+
+static u64 detect_stolen(struct xe_device *xe, struct xe_ttm_stolen_mgr *mgr)
+{
+#ifdef CONFIG_X86
+	/* Map into GGTT */
+	mgr->io_base = pci_resource_start(to_pci_dev(xe->drm.dev), 2);
+
+	/* Stolen memory is x86 only */
+	mgr->stolen_base = intel_graphics_stolen_res.start;
+	return resource_size(&intel_graphics_stolen_res);
+#else
+	return 0;
+#endif
+}
+
+void xe_ttm_stolen_mgr_init(struct xe_device *xe)
+{
+	struct xe_ttm_stolen_mgr *mgr = drmm_kzalloc(&xe->drm, sizeof(*mgr), GFP_KERNEL);
+	struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
+	u64 stolen_size, pgsize;
+	int err;
+
+	if (IS_DGFX(xe))
+		stolen_size = detect_bar2_dgfx(xe, mgr);
+	else if (!xe_ttm_stolen_inaccessible(xe))
+		stolen_size = detect_bar2_integrated(xe, mgr);
+	else
+		stolen_size = detect_stolen(xe, mgr);
+
+	if (!stolen_size) {
+		drm_dbg_kms(&xe->drm, "No stolen memory support\n");
+		return;
+	}
+
+	pgsize = xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K ? SZ_64K : SZ_4K;
+	if (pgsize < PAGE_SIZE)
+		pgsize = PAGE_SIZE;
+
+
+	err = __xe_ttm_vram_mgr_init(xe, &mgr->base, XE_PL_STOLEN, stolen_size, pgsize);
+	if (err) {
+		drm_dbg_kms(&xe->drm, "Stolen mgr init failed: %i\n", err);
+		return;
+	}
+
+	drm_dbg_kms(&xe->drm, "Initialized stolen memory support with %llu bytes\n",
+		    stolen_size);
+
+	if (!xe_ttm_stolen_inaccessible(xe))
+		mgr->mapping = devm_ioremap_wc(&pdev->dev, mgr->io_base, stolen_size);
+}
+
+u64 xe_ttm_stolen_io_offset(struct xe_bo *bo, u32 offset)
+{
+	struct xe_device *xe = xe_bo_device(bo);
+	struct ttm_resource_manager *ttm_mgr = ttm_manager_type(&xe->ttm, XE_PL_STOLEN);
+	struct xe_ttm_stolen_mgr *mgr = to_stolen_mgr(ttm_mgr);
+	struct xe_res_cursor cur;
+
+	if (!mgr->io_base)
+		return 0;
+
+	if (!IS_DGFX(xe) && xe_ttm_stolen_inaccessible(xe))
+		return mgr->io_base + xe_bo_ggtt_addr(bo) + offset;
+
+	xe_res_first(bo->ttm.resource, offset, 4096, &cur);
+	return mgr->io_base + cur.start;
+}
+
+static int __xe_ttm_stolen_io_mem_reserve_bar2(struct xe_device *xe,
+					       struct xe_ttm_stolen_mgr *mgr,
+					       struct ttm_resource *mem)
+{
+	struct xe_res_cursor cur;
+
+	if (!mgr->io_base)
+		return -EIO;
+
+	xe_res_first(mem, 0, 4096, &cur);
+	mem->bus.offset = cur.start;
+
+	drm_WARN_ON(&xe->drm, !(mem->placement & TTM_PL_FLAG_CONTIGUOUS));
+	WARN_ON_ONCE(1);
+
+	if (mem->placement & TTM_PL_FLAG_CONTIGUOUS && mgr->mapping)
+		mem->bus.addr = (u8 *)mgr->mapping + mem->bus.offset;
+
+	mem->bus.offset += mgr->io_base;
+	mem->bus.is_iomem = true;
+	mem->bus.caching = ttm_write_combined;
+
+	return 0;
+}
+
+static int __xe_ttm_stolen_io_mem_reserve_stolen(struct xe_device *xe,
+						 struct xe_ttm_stolen_mgr *mgr,
+						 struct ttm_resource *mem)
+{
+#ifdef CONFIG_X86
+	struct xe_bo *bo = ttm_to_xe_bo(mem->bo);
+
+	/* XXX: Require BO to be mapped to GGTT? */
+	if (drm_WARN_ON(&xe->drm, !(bo->flags & XE_BO_CREATE_GGTT_BIT)))
+		return -EIO;
+
+	/* GGTT is always contiguously mapped */
+	mem->bus.offset = xe_bo_ggtt_addr(bo) + mgr->io_base;
+
+	mem->bus.is_iomem = true;
+	mem->bus.caching = ttm_write_combined;
+
+	return 0;
+#else
+	/* How is it even possible to get here without gen12 stolen? */
+	drm_WARN_ON(&xe->drm, 1);
+	return -EIO;
+#endif
+}
+
+int xe_ttm_stolen_io_mem_reserve(struct xe_device *xe, struct ttm_resource *mem)
+{
+	struct ttm_resource_manager *ttm_mgr = ttm_manager_type(&xe->ttm, XE_PL_STOLEN);
+	struct xe_ttm_stolen_mgr *mgr = ttm_mgr ? to_stolen_mgr(ttm_mgr) : NULL;
+
+	if (!mgr || !mgr->io_base)
+		return -EIO;
+
+	if (!xe_ttm_stolen_inaccessible(xe))
+		return __xe_ttm_stolen_io_mem_reserve_bar2(xe, mgr, mem);
+	else
+		return __xe_ttm_stolen_io_mem_reserve_stolen(xe, mgr, mem);
+}
+
+u64 xe_ttm_stolen_gpu_offset(struct xe_device *xe)
+{
+	struct xe_ttm_stolen_mgr *mgr =
+		to_stolen_mgr(ttm_manager_type(&xe->ttm, XE_PL_STOLEN));
+
+	return mgr->stolen_base;
+}
diff --git a/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.h b/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.h
new file mode 100644
index 000000000000..ade37abb0623
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef _XE_TTM_STOLEN_MGR_H_
+#define _XE_TTM_STOLEN_MGR_H_
+
+#include <linux/types.h>
+
+struct ttm_resource;
+struct xe_bo;
+struct xe_device;
+
+void xe_ttm_stolen_mgr_init(struct xe_device *xe);
+int xe_ttm_stolen_io_mem_reserve(struct xe_device *xe, struct ttm_resource *mem);
+bool xe_ttm_stolen_inaccessible(struct xe_device *xe);
+u64 xe_ttm_stolen_io_offset(struct xe_bo *bo, u32 offset);
+u64 xe_ttm_stolen_gpu_offset(struct xe_device *xe);
+
+#endif
diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
index e391e81d3640..c7e21673b8fd 100644
--- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
+++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
@@ -15,25 +15,14 @@
 #include "xe_res_cursor.h"
 #include "xe_ttm_vram_mgr.h"
 
-static inline struct xe_ttm_vram_mgr *
-to_vram_mgr(struct ttm_resource_manager *man)
-{
-	return container_of(man, struct xe_ttm_vram_mgr, manager);
-}
-
-static inline struct xe_gt *
-mgr_to_gt(struct xe_ttm_vram_mgr *mgr)
-{
-	return mgr->gt;
-}
-
 static inline struct drm_buddy_block *
 xe_ttm_vram_mgr_first_block(struct list_head *list)
 {
 	return list_first_entry_or_null(list, struct drm_buddy_block, link);
 }
 
-static inline bool xe_is_vram_mgr_blocks_contiguous(struct list_head *head)
+static inline bool xe_is_vram_mgr_blocks_contiguous(struct drm_buddy *mm,
+						    struct list_head *head)
 {
 	struct drm_buddy_block *block;
 	u64 start, size;
@@ -43,12 +32,12 @@ static inline bool xe_is_vram_mgr_blocks_contiguous(struct list_head *head)
 		return false;
 
 	while (head != block->link.next) {
-		start = xe_ttm_vram_mgr_block_start(block);
-		size = xe_ttm_vram_mgr_block_size(block);
+		start = drm_buddy_block_offset(block);
+		size = drm_buddy_block_size(mm, block);
 
 		block = list_entry(block->link.next, struct drm_buddy_block,
 				   link);
-		if (start + size != xe_ttm_vram_mgr_block_start(block))
+		if (start + size != drm_buddy_block_offset(block))
 			return false;
 	}
 
@@ -61,7 +50,7 @@ static int xe_ttm_vram_mgr_new(struct ttm_resource_manager *man,
 			       struct ttm_resource **res)
 {
 	u64 max_bytes, cur_size, min_block_size;
-	struct xe_ttm_vram_mgr *mgr = to_vram_mgr(man);
+	struct xe_ttm_vram_mgr *mgr = to_xe_ttm_vram_mgr(man);
 	struct xe_ttm_vram_mgr_resource *vres;
 	u64 size, remaining_size, lpfn, fpfn;
 	struct drm_buddy *mm = &mgr->mm;
@@ -70,12 +59,12 @@ static int xe_ttm_vram_mgr_new(struct ttm_resource_manager *man,
 	int r;
 
 	lpfn = (u64)place->lpfn << PAGE_SHIFT;
-	if (!lpfn)
+	if (!lpfn || lpfn > man->size)
 		lpfn = man->size;
 
 	fpfn = (u64)place->fpfn << PAGE_SHIFT;
 
-	max_bytes = mgr->gt->mem.vram.size;
+	max_bytes = mgr->manager.size;
 	if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
 		pages_per_block = ~0ul;
 	} else {
@@ -183,7 +172,7 @@ static int xe_ttm_vram_mgr_new(struct ttm_resource_manager *man,
 			 * Compute the original_size value by subtracting the
 			 * last block size with (aligned size - original size)
 			 */
-			original_size = xe_ttm_vram_mgr_block_size(block) -
+			original_size = drm_buddy_block_size(mm, block) -
 				(size - cur_size);
 		}
 
@@ -201,8 +190,8 @@ static int xe_ttm_vram_mgr_new(struct ttm_resource_manager *man,
 	list_for_each_entry(block, &vres->blocks, link) {
 		unsigned long start;
 
-		start = xe_ttm_vram_mgr_block_start(block) +
-			xe_ttm_vram_mgr_block_size(block);
+		start = drm_buddy_block_offset(block) +
+			drm_buddy_block_size(mm, block);
 		start >>= PAGE_SHIFT;
 
 		if (start > PFN_UP(vres->base.size))
@@ -212,7 +201,7 @@ static int xe_ttm_vram_mgr_new(struct ttm_resource_manager *man,
 		vres->base.start = max(vres->base.start, start);
 	}
 
-	if (xe_is_vram_mgr_blocks_contiguous(&vres->blocks))
+	if (xe_is_vram_mgr_blocks_contiguous(mm, &vres->blocks))
 		vres->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
 
 	*res = &vres->base;
@@ -233,7 +222,7 @@ static void xe_ttm_vram_mgr_del(struct ttm_resource_manager *man,
 {
 	struct xe_ttm_vram_mgr_resource *vres =
 		to_xe_ttm_vram_mgr_resource(res);
-	struct xe_ttm_vram_mgr *mgr = to_vram_mgr(man);
+	struct xe_ttm_vram_mgr *mgr = to_xe_ttm_vram_mgr(man);
 	struct drm_buddy *mm = &mgr->mm;
 
 	mutex_lock(&mgr->lock);
@@ -248,7 +237,7 @@ static void xe_ttm_vram_mgr_del(struct ttm_resource_manager *man,
 static void xe_ttm_vram_mgr_debug(struct ttm_resource_manager *man,
 				  struct drm_printer *printer)
 {
-	struct xe_ttm_vram_mgr *mgr = to_vram_mgr(man);
+	struct xe_ttm_vram_mgr *mgr = to_xe_ttm_vram_mgr(man);
 	struct drm_buddy *mm = &mgr->mm;
 
 	mutex_lock(&mgr->lock);
@@ -263,54 +252,54 @@ static const struct ttm_resource_manager_func xe_ttm_vram_mgr_func = {
 	.debug	= xe_ttm_vram_mgr_debug
 };
 
-static void ttm_vram_mgr_fini(struct drm_device *drm, void *arg)
+static void ttm_vram_mgr_fini(struct drm_device *dev, void *arg)
 {
+	struct xe_device *xe = to_xe_device(dev);
 	struct xe_ttm_vram_mgr *mgr = arg;
-	struct xe_device *xe = gt_to_xe(mgr->gt);
 	struct ttm_resource_manager *man = &mgr->manager;
-	int err;
 
 	ttm_resource_manager_set_used(man, false);
 
-	err = ttm_resource_manager_evict_all(&xe->ttm, man);
-	if (err)
+	if (ttm_resource_manager_evict_all(&xe->ttm, man))
 		return;
 
 	drm_buddy_fini(&mgr->mm);
 
-	ttm_resource_manager_cleanup(man);
-	ttm_set_driver_manager(&xe->ttm, XE_PL_VRAM0 + mgr->gt->info.vram_id,
-			       NULL);
+	ttm_resource_manager_cleanup(&mgr->manager);
+
+	ttm_set_driver_manager(&xe->ttm, mgr->mem_type, NULL);
 }
 
-int xe_ttm_vram_mgr_init(struct xe_gt *gt, struct xe_ttm_vram_mgr *mgr)
+int __xe_ttm_vram_mgr_init(struct xe_device *xe, struct xe_ttm_vram_mgr *mgr,
+			   u32 mem_type, u64 size, u64 default_page_size)
 {
-	struct xe_device *xe = gt_to_xe(gt);
 	struct ttm_resource_manager *man = &mgr->manager;
 	int err;
 
-	XE_BUG_ON(xe_gt_is_media_type(gt));
-
-	mgr->gt = gt;
 	man->func = &xe_ttm_vram_mgr_func;
+	mgr->mem_type = mem_type;
+	mutex_init(&mgr->lock);
+	mgr->default_page_size = default_page_size;
 
-	ttm_resource_manager_init(man, &xe->ttm, gt->mem.vram.size);
-	err = drm_buddy_init(&mgr->mm, man->size, PAGE_SIZE);
-	if (err)
-		return err;
+	ttm_resource_manager_init(man, &xe->ttm, size);
+	err = drm_buddy_init(&mgr->mm, man->size, default_page_size);
 
-	mutex_init(&mgr->lock);
-	mgr->default_page_size = PAGE_SIZE;
+	ttm_set_driver_manager(&xe->ttm, mem_type, &mgr->manager);
+	ttm_resource_manager_set_used(&mgr->manager, true);
+
+	return drmm_add_action_or_reset(&xe->drm, ttm_vram_mgr_fini, mgr);
+}
+
+int xe_ttm_vram_mgr_init(struct xe_gt *gt, struct xe_ttm_vram_mgr *mgr)
+{
+	struct xe_device *xe = gt_to_xe(gt);
 
-	ttm_set_driver_manager(&xe->ttm, XE_PL_VRAM0 + gt->info.vram_id,
-			       &mgr->manager);
-	ttm_resource_manager_set_used(man, true);
+	XE_BUG_ON(xe_gt_is_media_type(gt));
 
-	err = drmm_add_action_or_reset(&xe->drm, ttm_vram_mgr_fini, mgr);
-	if (err)
-		return err;
+	mgr->gt = gt;
 
-	return 0;
+	return __xe_ttm_vram_mgr_init(xe, mgr, XE_PL_VRAM0 + gt->info.vram_id,
+				      gt->mem.vram.size, PAGE_SIZE);
 }
 
 int xe_ttm_vram_mgr_alloc_sgt(struct xe_device *xe,
diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.h b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.h
index 537fccec4318..78f332d26224 100644
--- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.h
+++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.h
@@ -12,6 +12,8 @@ enum dma_data_direction;
 struct xe_device;
 struct xe_gt;
 
+int __xe_ttm_vram_mgr_init(struct xe_device *xe, struct xe_ttm_vram_mgr *mgr,
+			   u32 mem_type, u64 size, u64 default_page_size);
 int xe_ttm_vram_mgr_init(struct xe_gt *gt, struct xe_ttm_vram_mgr *mgr);
 int xe_ttm_vram_mgr_alloc_sgt(struct xe_device *xe,
 			      struct ttm_resource *res,
@@ -22,20 +24,16 @@ int xe_ttm_vram_mgr_alloc_sgt(struct xe_device *xe,
 void xe_ttm_vram_mgr_free_sgt(struct device *dev, enum dma_data_direction dir,
 			      struct sg_table *sgt);
 
-static inline u64 xe_ttm_vram_mgr_block_start(struct drm_buddy_block *block)
-{
-	return drm_buddy_block_offset(block);
-}
-
-static inline u64 xe_ttm_vram_mgr_block_size(struct drm_buddy_block *block)
-{
-	return PAGE_SIZE << drm_buddy_block_order(block);
-}
-
 static inline struct xe_ttm_vram_mgr_resource *
 to_xe_ttm_vram_mgr_resource(struct ttm_resource *res)
 {
 	return container_of(res, struct xe_ttm_vram_mgr_resource, base);
 }
 
+static inline struct xe_ttm_vram_mgr *
+to_xe_ttm_vram_mgr(struct ttm_resource_manager *man)
+{
+	return container_of(man, struct xe_ttm_vram_mgr, manager);
+}
+
 #endif
diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr_types.h b/drivers/gpu/drm/xe/xe_ttm_vram_mgr_types.h
index 39b93c71c21b..cf02c62ff427 100644
--- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr_types.h
+++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr_types.h
@@ -27,6 +27,8 @@ struct xe_ttm_vram_mgr {
 	u64 default_page_size;
 	/** @lock: protects allocations of VRAM */
 	struct mutex lock;
+
+	u32 mem_type;
 };
 
 /**