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kernel
os
linux
drm/xe: Add sa/guc_buf_cache sync interface
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>
+36
+13
drivers/gpu/drm/xe/xe_guc_buf.c
+13
drivers/gpu/drm/xe/xe_guc_buf.c
···
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}
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/**
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+
* xe_guc_buf_sync_read() - Copy the data from the GPU memory to the sub-allocation.
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* @buf: the &xe_guc_buf to sync
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*
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* Return: a CPU pointer of the sub-allocation.
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*/
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void *xe_guc_buf_sync_read(const struct xe_guc_buf buf)
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{
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xe_sa_bo_sync_read(buf.sa);
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return xe_sa_bo_cpu_addr(buf.sa);
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}
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/**
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* xe_guc_buf_flush() - Copy the data from the sub-allocation to the GPU memory.
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* @buf: the &xe_guc_buf to flush
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*
+1
drivers/gpu/drm/xe/xe_guc_buf.h
+1
drivers/gpu/drm/xe/xe_guc_buf.h
···
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}
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void *xe_guc_buf_cpu_ptr(const struct xe_guc_buf buf);
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+
void *xe_guc_buf_sync_read(const struct xe_guc_buf buf);
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u64 xe_guc_buf_flush(const struct xe_guc_buf buf);
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u64 xe_guc_buf_gpu_addr(const struct xe_guc_buf buf);
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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
+21
drivers/gpu/drm/xe/xe_sa.c
···
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return drm_suballoc_new(&sa_manager->base, size, gfp, true, 0);
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}
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+
/**
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* xe_sa_bo_flush_write() - Copy the data from the sub-allocation to the GPU memory.
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* @sa_bo: the &drm_suballoc to flush
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*/
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void xe_sa_bo_flush_write(struct drm_suballoc *sa_bo)
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{
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struct xe_sa_manager *sa_manager = to_xe_sa_manager(sa_bo->manager);
···
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xe_map_memcpy_to(xe, &sa_manager->bo->vmap, drm_suballoc_soffset(sa_bo),
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xe_sa_bo_cpu_addr(sa_bo),
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drm_suballoc_size(sa_bo));
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+
}
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/**
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* xe_sa_bo_sync_read() - Copy the data from GPU memory to the sub-allocation.
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* @sa_bo: the &drm_suballoc to sync
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*/
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void xe_sa_bo_sync_read(struct drm_suballoc *sa_bo)
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{
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struct xe_sa_manager *sa_manager = to_xe_sa_manager(sa_bo->manager);
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struct xe_device *xe = tile_to_xe(sa_manager->bo->tile);
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+
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if (!sa_manager->bo->vmap.is_iomem)
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return;
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+
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xe_map_memcpy_from(xe, xe_sa_bo_cpu_addr(sa_bo), &sa_manager->bo->vmap,
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drm_suballoc_soffset(sa_bo),
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drm_suballoc_size(sa_bo));
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}
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void xe_sa_bo_free(struct drm_suballoc *sa_bo,