[PATCH 1/2] drm/amdgpu: cleanup amdgpu_ttm_copy_mem_to_mem and amdgpu_map_buffer
Christian König
ckoenig.leichtzumerken at gmail.com
Thu Mar 19 13:41:01 UTC 2020
Cleanup amdgpu_ttm_copy_mem_to_mem by using fewer variables
for the same value.
Rename amdgpu_map_buffer to amdgpu_ttm_map_buffer, move it
to avoid the forward decleration, cleanup by moving the map
decission into the function and add some documentation.
No functional change.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 244 ++++++++++++------------
1 file changed, 118 insertions(+), 126 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 665db2353a78..2b5974268e63 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -62,12 +62,6 @@
#define AMDGPU_TTM_VRAM_MAX_DW_READ (size_t)128
-static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
- struct ttm_mem_reg *mem, unsigned num_pages,
- uint64_t offset, unsigned window,
- struct amdgpu_ring *ring, bool tmz,
- uint64_t *addr);
-
static int amdgpu_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
{
return 0;
@@ -293,6 +287,92 @@ static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_mem_reg *mem,
return mm_node;
}
+/**
+ * amdgpu_ttm_map_buffer - Map memory into the GART windows
+ * @bo: buffer object to map
+ * @mem: memory object to map
+ * @num_pages: number of pages to map
+ * @offset: offset into @mem where to start
+ * @windows: which GART window to use
+ * @ring: DMA ring to use for the copy
+ * @tmz: if we should setup a TMZ enabled mapping
+ * @addr: resulting address inside the MC address space
+ *
+ * Setup one of the GART windows to access a specific piece of memory.
+ */
+static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
+ struct ttm_mem_reg *mem,
+ struct drm_mm_node *mm_node,
+ unsigned num_pages, uint64_t offset,
+ unsigned window, struct amdgpu_ring *ring,
+ bool tmz, uint64_t *addr)
+{
+ struct ttm_dma_tt *dma = container_of(bo->ttm, struct ttm_dma_tt, ttm);
+ struct amdgpu_device *adev = ring->adev;
+ struct amdgpu_job *job;
+ unsigned num_dw, num_bytes;
+ dma_addr_t *dma_address;
+ struct dma_fence *fence;
+ uint64_t src_addr, dst_addr;
+ uint64_t flags;
+ int r;
+
+ BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
+ AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
+
+ /* Map only what can't be accessed directly */
+ if (mem->start != AMDGPU_BO_INVALID_OFFSET) {
+ *addr = amdgpu_mm_node_addr(bo, mm_node, mem) + offset;
+ return 0;
+ }
+
+ *addr = adev->gmc.gart_start;
+ *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE *
+ AMDGPU_GPU_PAGE_SIZE;
+ *addr += offset & ~PAGE_MASK;
+
+ num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
+ num_bytes = num_pages * 8;
+
+ r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes, &job);
+ if (r)
+ return r;
+
+ src_addr = num_dw * 4;
+ src_addr += job->ibs[0].gpu_addr;
+
+ dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo);
+ dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8;
+ amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr,
+ dst_addr, num_bytes, false);
+
+ amdgpu_ring_pad_ib(ring, &job->ibs[0]);
+ WARN_ON(job->ibs[0].length_dw > num_dw);
+
+ dma_address = &dma->dma_address[offset >> PAGE_SHIFT];
+ flags = amdgpu_ttm_tt_pte_flags(adev, bo->ttm, mem);
+ if (tmz)
+ flags |= AMDGPU_PTE_TMZ;
+
+ r = amdgpu_gart_map(adev, 0, num_pages, dma_address, flags,
+ &job->ibs[0].ptr[num_dw]);
+ if (r)
+ goto error_free;
+
+ r = amdgpu_job_submit(job, &adev->mman.entity,
+ AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
+ if (r)
+ goto error_free;
+
+ dma_fence_put(fence);
+
+ return r;
+
+error_free:
+ amdgpu_job_free(job);
+ return r;
+}
+
/**
* amdgpu_copy_ttm_mem_to_mem - Helper function for copy
* @adev: amdgpu device
@@ -315,14 +395,14 @@ int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
struct dma_resv *resv,
struct dma_fence **f)
{
+ const uint32_t GTT_MAX_BYTES = (AMDGPU_GTT_MAX_TRANSFER_SIZE *
+ AMDGPU_GPU_PAGE_SIZE);
+
struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
+ uint64_t src_node_size, dst_node_size;
struct drm_mm_node *src_mm, *dst_mm;
- uint64_t src_node_start, dst_node_start, src_node_size,
- dst_node_size, src_page_offset, dst_page_offset;
struct dma_fence *fence = NULL;
int r = 0;
- const uint64_t GTT_MAX_BYTES = (AMDGPU_GTT_MAX_TRANSFER_SIZE *
- AMDGPU_GPU_PAGE_SIZE);
if (!adev->mman.buffer_funcs_enabled) {
DRM_ERROR("Trying to move memory with ring turned off.\n");
@@ -330,58 +410,39 @@ int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
}
src_mm = amdgpu_find_mm_node(src->mem, &src->offset);
- src_node_start = amdgpu_mm_node_addr(src->bo, src_mm, src->mem) +
- src->offset;
src_node_size = (src_mm->size << PAGE_SHIFT) - src->offset;
- src_page_offset = src_node_start & (PAGE_SIZE - 1);
dst_mm = amdgpu_find_mm_node(dst->mem, &dst->offset);
- dst_node_start = amdgpu_mm_node_addr(dst->bo, dst_mm, dst->mem) +
- dst->offset;
dst_node_size = (dst_mm->size << PAGE_SHIFT) - dst->offset;
- dst_page_offset = dst_node_start & (PAGE_SIZE - 1);
mutex_lock(&adev->mman.gtt_window_lock);
while (size) {
- unsigned long cur_size;
- uint64_t from = src_node_start, to = dst_node_start;
+ uint32_t src_page_offset = src->offset & ~PAGE_MASK;
+ uint32_t dst_page_offset = dst->offset & ~PAGE_MASK;
struct dma_fence *next;
+ uint32_t cur_size;
+ uint64_t from, to;
/* Copy size cannot exceed GTT_MAX_BYTES. So if src or dst
* begins at an offset, then adjust the size accordingly
*/
- cur_size = min3(min(src_node_size, dst_node_size), size,
- GTT_MAX_BYTES);
- if (cur_size + src_page_offset > GTT_MAX_BYTES ||
- cur_size + dst_page_offset > GTT_MAX_BYTES)
- cur_size -= max(src_page_offset, dst_page_offset);
-
- /* Map only what needs to be accessed. Map src to window 0 and
- * dst to window 1
- */
- if (src->mem->start == AMDGPU_BO_INVALID_OFFSET) {
- r = amdgpu_map_buffer(src->bo, src->mem,
- PFN_UP(cur_size + src_page_offset),
- src_node_start, 0, ring, tmz,
- &from);
- if (r)
- goto error;
- /* Adjust the offset because amdgpu_map_buffer returns
- * start of mapped page
- */
- from += src_page_offset;
- }
+ cur_size = min3(src_node_size, dst_node_size, size);
+ cur_size = min(GTT_MAX_BYTES - src_page_offset, cur_size);
+ cur_size = min(GTT_MAX_BYTES - dst_page_offset, cur_size);
+
+ /* Map src to window 0 and dst to window 1. */
+ r = amdgpu_ttm_map_buffer(src->bo, src->mem, src_mm,
+ PFN_UP(cur_size + src_page_offset),
+ src->offset, 0, ring, tmz, &from);
+ if (r)
+ goto error;
- if (dst->mem->start == AMDGPU_BO_INVALID_OFFSET) {
- r = amdgpu_map_buffer(dst->bo, dst->mem,
- PFN_UP(cur_size + dst_page_offset),
- dst_node_start, 1, ring, tmz,
- &to);
- if (r)
- goto error;
- to += dst_page_offset;
- }
+ r = amdgpu_ttm_map_buffer(dst->bo, dst->mem, dst_mm,
+ PFN_UP(cur_size + dst_page_offset),
+ dst->offset, 1, ring, tmz, &to);
+ if (r)
+ goto error;
r = amdgpu_copy_buffer(ring, from, to, cur_size,
resv, &next, false, true, tmz);
@@ -397,23 +458,20 @@ int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
src_node_size -= cur_size;
if (!src_node_size) {
- src_node_start = amdgpu_mm_node_addr(src->bo, ++src_mm,
- src->mem);
- src_node_size = (src_mm->size << PAGE_SHIFT);
- src_page_offset = 0;
+ ++src_mm;
+ src_node_size = src_mm->size << PAGE_SHIFT;
+ src->offset = 0;
} else {
- src_node_start += cur_size;
- src_page_offset = src_node_start & (PAGE_SIZE - 1);
+ src->offset += cur_size;
}
+
dst_node_size -= cur_size;
if (!dst_node_size) {
- dst_node_start = amdgpu_mm_node_addr(dst->bo, ++dst_mm,
- dst->mem);
- dst_node_size = (dst_mm->size << PAGE_SHIFT);
- dst_page_offset = 0;
+ ++dst_mm;
+ dst_node_size = dst_mm->size << PAGE_SHIFT;
+ dst->offset = 0;
} else {
- dst_node_start += cur_size;
- dst_page_offset = dst_node_start & (PAGE_SIZE - 1);
+ dst->offset += cur_size;
}
}
error:
@@ -2033,72 +2091,6 @@ int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma)
return ttm_bo_mmap(filp, vma, &adev->mman.bdev);
}
-static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
- struct ttm_mem_reg *mem, unsigned num_pages,
- uint64_t offset, unsigned window,
- struct amdgpu_ring *ring, bool tmz,
- uint64_t *addr)
-{
- struct amdgpu_ttm_tt *gtt = (void *)bo->ttm;
- struct amdgpu_device *adev = ring->adev;
- struct ttm_tt *ttm = bo->ttm;
- struct amdgpu_job *job;
- unsigned num_dw, num_bytes;
- dma_addr_t *dma_address;
- struct dma_fence *fence;
- uint64_t src_addr, dst_addr;
- uint64_t flags;
- int r;
-
- BUG_ON(adev->mman.buffer_funcs->copy_max_bytes <
- AMDGPU_GTT_MAX_TRANSFER_SIZE * 8);
-
- *addr = adev->gmc.gart_start;
- *addr += (u64)window * AMDGPU_GTT_MAX_TRANSFER_SIZE *
- AMDGPU_GPU_PAGE_SIZE;
-
- num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
- num_bytes = num_pages * 8;
-
- r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes, &job);
- if (r)
- return r;
-
- src_addr = num_dw * 4;
- src_addr += job->ibs[0].gpu_addr;
-
- dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo);
- dst_addr += window * AMDGPU_GTT_MAX_TRANSFER_SIZE * 8;
- amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr,
- dst_addr, num_bytes, false);
-
- amdgpu_ring_pad_ib(ring, &job->ibs[0]);
- WARN_ON(job->ibs[0].length_dw > num_dw);
-
- dma_address = >t->ttm.dma_address[offset >> PAGE_SHIFT];
- flags = amdgpu_ttm_tt_pte_flags(adev, ttm, mem);
- if (tmz)
- flags |= AMDGPU_PTE_TMZ;
-
- r = amdgpu_gart_map(adev, 0, num_pages, dma_address, flags,
- &job->ibs[0].ptr[num_dw]);
- if (r)
- goto error_free;
-
- r = amdgpu_job_submit(job, &adev->mman.entity,
- AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
- if (r)
- goto error_free;
-
- dma_fence_put(fence);
-
- return r;
-
-error_free:
- amdgpu_job_free(job);
- return r;
-}
-
int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
uint64_t dst_offset, uint32_t byte_count,
struct dma_resv *resv,
--
2.17.1
More information about the amd-gfx
mailing list