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drm/amdgpu: Add reserved region ids

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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>
This commit is contained in:
Lijo Lazar 2026-03-25 16:36:16 +05:30 committed by Alex Deucher
parent 8d45d88e0b
commit c9042a4dd6
2 changed files with 89 additions and 0 deletions
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58
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
View File

@ -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
*/

31
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
View File

@ -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,