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drm/xe: Add sa/guc_buf_cache sync interface

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In upcoming changes the cached buffers are going to be used to read data
produced by the GuC. Add a counterpart to flush, which synchronizes the
CPU-side of suballocation with the GPU data and propagate the interface
to GuC Buffer Cache.

Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251112132220.516975-11-michal.winiarski@intel.com
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
This commit is contained in:
Michał Winiarski
2025-11-12 14:22:06 +01:00
parent 20cfef3ae2
commit 4f4bdbda72
4 changed files with 36 additions and 0 deletions
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13
drivers/gpu/drm/xe/xe_guc_buf.c
View File

@@ -115,6 +115,19 @@ void xe_guc_buf_release(const struct xe_guc_buf buf)
xe_sa_bo_free(buf.sa, NULL);
}
/**
* xe_guc_buf_sync_read() - Copy the data from the GPU memory to the sub-allocation.
* @buf: the &xe_guc_buf to sync
*
* Return: a CPU pointer of the sub-allocation.
*/
void *xe_guc_buf_sync_read(const struct xe_guc_buf buf)
{
xe_sa_bo_sync_read(buf.sa);
return xe_sa_bo_cpu_addr(buf.sa);
}
/**
* xe_guc_buf_flush() - Copy the data from the sub-allocation to the GPU memory.
* @buf: the &xe_guc_buf to flush

1
drivers/gpu/drm/xe/xe_guc_buf.h
View File

@@ -30,6 +30,7 @@ static inline bool xe_guc_buf_is_valid(const struct xe_guc_buf buf)
}
void *xe_guc_buf_cpu_ptr(const struct xe_guc_buf buf);
void *xe_guc_buf_sync_read(const struct xe_guc_buf buf);
u64 xe_guc_buf_flush(const struct xe_guc_buf buf);
u64 xe_guc_buf_gpu_addr(const struct xe_guc_buf buf);
u64 xe_guc_cache_gpu_addr_from_ptr(struct xe_guc_buf_cache *cache, const void *ptr, u32 size);

21
drivers/gpu/drm/xe/xe_sa.c
View File

@@ -110,6 +110,10 @@ struct drm_suballoc *__xe_sa_bo_new(struct xe_sa_manager *sa_manager, u32 size,
return drm_suballoc_new(&sa_manager->base, size, gfp, true, 0);
}
/**
* xe_sa_bo_flush_write() - Copy the data from the sub-allocation to the GPU memory.
* @sa_bo: the &drm_suballoc to flush
*/
void xe_sa_bo_flush_write(struct drm_suballoc *sa_bo)
{
struct xe_sa_manager *sa_manager = to_xe_sa_manager(sa_bo->manager);
@@ -123,6 +127,23 @@ void xe_sa_bo_flush_write(struct drm_suballoc *sa_bo)
drm_suballoc_size(sa_bo));
}
/**
* xe_sa_bo_sync_read() - Copy the data from GPU memory to the sub-allocation.
* @sa_bo: the &drm_suballoc to sync
*/
void xe_sa_bo_sync_read(struct drm_suballoc *sa_bo)
{
struct xe_sa_manager *sa_manager = to_xe_sa_manager(sa_bo->manager);
struct xe_device *xe = tile_to_xe(sa_manager->bo->tile);
if (!sa_manager->bo->vmap.is_iomem)
return;
xe_map_memcpy_from(xe, xe_sa_bo_cpu_addr(sa_bo), &sa_manager->bo->vmap,
drm_suballoc_soffset(sa_bo),
drm_suballoc_size(sa_bo));
}
void xe_sa_bo_free(struct drm_suballoc *sa_bo,
struct dma_fence *fence)
{

1
drivers/gpu/drm/xe/xe_sa.h
View File

@@ -37,6 +37,7 @@ static inline struct drm_suballoc *xe_sa_bo_new(struct xe_sa_manager *sa_manager
}
void xe_sa_bo_flush_write(struct drm_suballoc *sa_bo);
void xe_sa_bo_sync_read(struct drm_suballoc *sa_bo);
void xe_sa_bo_free(struct drm_suballoc *sa_bo, struct dma_fence *fence);
static inline struct xe_sa_manager *