From: Lijo Lazar <lijo.lazar@amd.com>
Date: Wed, 25 Mar 2026 11:06:16 +0000 (+0530)
Subject: drm/amdgpu: Add reserved region ids
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c9042a4dd6ac311281fc2d95d0d9f8e3278608c5;p=thirdparty%2Flinux.git

drm/amdgpu: Add reserved region ids

Add reserved regions and helper functions to memory manager.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index afaaab6496de..8f0b13a39b61 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1671,6 +1671,64 @@ static struct ttm_device_funcs amdgpu_bo_driver = {
 	.access_memory = &amdgpu_ttm_access_memory,
 };
 
+void amdgpu_ttm_init_vram_resv(struct amdgpu_device *adev,
+				enum amdgpu_resv_region_id id,
+				uint64_t offset, uint64_t size,
+				bool needs_cpu_map)
+{
+	struct amdgpu_vram_resv *resv;
+
+	if (id >= AMDGPU_RESV_MAX)
+		return;
+
+	resv = &adev->mman.resv_region[id];
+	resv->offset = offset;
+	resv->size = size;
+	resv->needs_cpu_map = needs_cpu_map;
+}
+
+int amdgpu_ttm_mark_vram_reserved(struct amdgpu_device *adev,
+				  enum amdgpu_resv_region_id id)
+{
+	struct amdgpu_vram_resv *resv;
+	int ret;
+
+	if (id >= AMDGPU_RESV_MAX)
+		return -EINVAL;
+
+	resv = &adev->mman.resv_region[id];
+	if (!resv->size)
+		return 0;
+
+	ret = amdgpu_bo_create_kernel_at(adev, resv->offset, resv->size,
+					 &resv->bo,
+					 resv->needs_cpu_map ? &resv->cpu_ptr : NULL);
+	if (ret) {
+		dev_dbg(adev->dev, "reserve vram failed: id=%d offset=0x%llx size=0x%llx ret=%d\n",
+			id, resv->offset, resv->size, ret);
+		memset(resv, 0, sizeof(*resv));
+	}
+
+	return ret;
+}
+
+void amdgpu_ttm_unmark_vram_reserved(struct amdgpu_device *adev,
+				     enum amdgpu_resv_region_id id)
+{
+	struct amdgpu_vram_resv *resv;
+
+	if (id >= AMDGPU_RESV_MAX)
+		return;
+
+	resv = &adev->mman.resv_region[id];
+	if (!resv->bo)
+		return;
+
+	amdgpu_bo_free_kernel(&resv->bo, NULL,
+			      resv->needs_cpu_map ? &resv->cpu_ptr : NULL);
+	memset(resv, 0, sizeof(*resv));
+}
+
 /*
  * Firmware Reservation functions
  */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
index 3b1973611446..7c49fe56a1df 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
@@ -59,6 +59,26 @@ struct amdgpu_ttm_buffer_entity {
 	u64			gart_window_offs[2];
 };
 
+enum amdgpu_resv_region_id {
+	AMDGPU_RESV_STOLEN_VGA,
+	AMDGPU_RESV_STOLEN_EXTENDED,
+	AMDGPU_RESV_STOLEN_RESERVED,
+	AMDGPU_RESV_FW,
+	AMDGPU_RESV_FW_EXTEND,
+	AMDGPU_RESV_FW_VRAM_USAGE,
+	AMDGPU_RESV_DRV_VRAM_USAGE,
+	AMDGPU_RESV_MEM_TRAIN,
+	AMDGPU_RESV_MAX
+};
+
+struct amdgpu_vram_resv {
+	uint64_t		offset;
+	uint64_t		size;
+	struct amdgpu_bo	*bo;
+	void			*cpu_ptr;
+	bool			needs_cpu_map;
+};
+
 struct amdgpu_mman {
 	struct ttm_device		bdev;
 	struct ttm_pool			*ttm_pools;
@@ -109,6 +129,8 @@ struct amdgpu_mman {
 	struct amdgpu_bo	*drv_vram_usage_reserved_bo;
 	void		*drv_vram_usage_va;
 
+	struct amdgpu_vram_resv		resv_region[AMDGPU_RESV_MAX];
+
 	/* PAGE_SIZE'd BO for process memory r/w over SDMA. */
 	struct amdgpu_bo	*sdma_access_bo;
 	void			*sdma_access_ptr;
@@ -175,6 +197,15 @@ void amdgpu_vram_mgr_clear_reset_blocks(struct amdgpu_device *adev);
 bool amdgpu_res_cpu_visible(struct amdgpu_device *adev,
 			    struct ttm_resource *res);
 
+void amdgpu_ttm_init_vram_resv(struct amdgpu_device *adev,
+				enum amdgpu_resv_region_id id,
+				uint64_t offset, uint64_t size,
+				bool needs_cpu_map);
+int amdgpu_ttm_mark_vram_reserved(struct amdgpu_device *adev,
+				  enum amdgpu_resv_region_id id);
+void amdgpu_ttm_unmark_vram_reserved(struct amdgpu_device *adev,
+				     enum amdgpu_resv_region_id id);
+
 int amdgpu_ttm_init(struct amdgpu_device *adev);
 void amdgpu_ttm_fini(struct amdgpu_device *adev);
 void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev,