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Commit e1d51505 authored by Harish Kasiviswanathan's avatar Harish Kasiviswanathan Committed by Alex Deucher
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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: default avatarHarish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 1eca5a53

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

+27 −22
Original line number Diff line number Diff line
@@ -291,7 +291,24 @@ static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo, 
}



/**

 * amdgpu_ttm_copy_mem_to_mem - Helper function for copy

 * amdgpu_find_mm_node - Helper function finds the drm_mm_node

 *  corresponding to @offset. It also modifies the offset to be

 *  within the drm_mm_node returned

 */

static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_mem_reg *mem,

					       unsigned long *offset)

{

	struct drm_mm_node *mm_node = mem->mm_node;



	while (*offset >= (mm_node->size << PAGE_SHIFT)) {

		*offset -= (mm_node->size << PAGE_SHIFT);

		++mm_node;

	}

	return mm_node;

}



/**

 * amdgpu_copy_ttm_mem_to_mem - Helper function for copy

 *

 * The function copies @size bytes from {src->mem + src->offset} to

 * {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
@@ -320,21 +337,13 @@ int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev, 
		return -EINVAL;

	}



	src_mm = src->mem->mm_node;

	while (src->offset >= (src_mm->size << PAGE_SHIFT)) {

		src->offset -= (src_mm->size << PAGE_SHIFT);

		++src_mm;

	}

	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 = dst->mem->mm_node;

	while (dst->offset >= (dst_mm->size << PAGE_SHIFT)) {

		dst->offset -= (dst_mm->size << PAGE_SHIFT);

		++dst_mm;

	}

	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;
@@ -654,13 +663,12 @@ static void amdgpu_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_re 
static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,

					   unsigned long page_offset)

{

	struct drm_mm_node *mm = bo->mem.mm_node;

	uint64_t size = mm->size;

	uint64_t offset = page_offset;

	struct drm_mm_node *mm;

	unsigned long offset = (page_offset << PAGE_SHIFT);



	page_offset = do_div(offset, size);

	mm += offset;

	return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start + page_offset;

	mm = amdgpu_find_mm_node(&bo->mem, &offset);

	return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start +

		(offset >> PAGE_SHIFT);

}



/*
@@ -1216,7 +1224,7 @@ static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo, 
{

	struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);

	struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);

	struct drm_mm_node *nodes = abo->tbo.mem.mm_node;

	struct drm_mm_node *nodes;

	uint32_t value = 0;

	int ret = 0;

	uint64_t pos;
@@ -1225,10 +1233,7 @@ static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo, 
	if (bo->mem.mem_type != TTM_PL_VRAM)

		return -EIO;



	while (offset >= (nodes->size << PAGE_SHIFT)) {

		offset -= nodes->size << PAGE_SHIFT;

		++nodes;

	}

	nodes = amdgpu_find_mm_node(&abo->tbo.mem, &offset);

	pos = (nodes->start << PAGE_SHIFT) + offset;



	while (len && pos < adev->mc.mc_vram_size) {