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drm/amdgpu: Add amdgpu_find_mm_node()
Replace some commonly repeated code with a function. v2: Use amdgpu_find_mm_node() in amdgpu_ttm_io_mem_pfn() Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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1eca5a530d
commit
e1d515052f
1 changed files with 27 additions and 22 deletions
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@ -291,7 +291,24 @@ static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo,
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}
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/**
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* amdgpu_ttm_copy_mem_to_mem - Helper function for copy
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* amdgpu_find_mm_node - Helper function finds the drm_mm_node
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* corresponding to @offset. It also modifies the offset to be
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* within the drm_mm_node returned
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*/
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static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_mem_reg *mem,
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unsigned long *offset)
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{
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struct drm_mm_node *mm_node = mem->mm_node;
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while (*offset >= (mm_node->size << PAGE_SHIFT)) {
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*offset -= (mm_node->size << PAGE_SHIFT);
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++mm_node;
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}
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return mm_node;
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}
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/**
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* amdgpu_copy_ttm_mem_to_mem - Helper function for copy
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*
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* The function copies @size bytes from {src->mem + src->offset} to
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* {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
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@ -320,21 +337,13 @@ int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
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return -EINVAL;
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}
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src_mm = src->mem->mm_node;
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while (src->offset >= (src_mm->size << PAGE_SHIFT)) {
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src->offset -= (src_mm->size << PAGE_SHIFT);
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++src_mm;
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}
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src_mm = amdgpu_find_mm_node(src->mem, &src->offset);
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src_node_start = amdgpu_mm_node_addr(src->bo, src_mm, src->mem) +
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src->offset;
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src_node_size = (src_mm->size << PAGE_SHIFT) - src->offset;
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src_page_offset = src_node_start & (PAGE_SIZE - 1);
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dst_mm = dst->mem->mm_node;
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while (dst->offset >= (dst_mm->size << PAGE_SHIFT)) {
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dst->offset -= (dst_mm->size << PAGE_SHIFT);
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++dst_mm;
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}
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dst_mm = amdgpu_find_mm_node(dst->mem, &dst->offset);
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dst_node_start = amdgpu_mm_node_addr(dst->bo, dst_mm, dst->mem) +
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dst->offset;
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dst_node_size = (dst_mm->size << PAGE_SHIFT) - dst->offset;
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@ -654,13 +663,12 @@ static void amdgpu_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_re
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static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
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unsigned long page_offset)
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{
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struct drm_mm_node *mm = bo->mem.mm_node;
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uint64_t size = mm->size;
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uint64_t offset = page_offset;
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struct drm_mm_node *mm;
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unsigned long offset = (page_offset << PAGE_SHIFT);
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page_offset = do_div(offset, size);
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mm += offset;
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return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start + page_offset;
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mm = amdgpu_find_mm_node(&bo->mem, &offset);
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return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start +
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(offset >> PAGE_SHIFT);
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}
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/*
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@ -1216,7 +1224,7 @@ static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
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{
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struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
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struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
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struct drm_mm_node *nodes = abo->tbo.mem.mm_node;
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struct drm_mm_node *nodes;
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uint32_t value = 0;
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int ret = 0;
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uint64_t pos;
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@ -1225,10 +1233,7 @@ static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
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if (bo->mem.mem_type != TTM_PL_VRAM)
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return -EIO;
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while (offset >= (nodes->size << PAGE_SHIFT)) {
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offset -= nodes->size << PAGE_SHIFT;
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++nodes;
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}
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nodes = amdgpu_find_mm_node(&abo->tbo.mem, &offset);
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pos = (nodes->start << PAGE_SHIFT) + offset;
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while (len && pos < adev->mc.mc_vram_size) {
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