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accel/habanalabs: always pass exported size to alloc_sgt_from_device_pages()

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For Gaudi1 the exported dma-buf is always composed of a single page, and
therefore the exported size is equal to this page's size.
When calling alloc_sgt_from_device_pages(), we pass 0 as the exported
size and internally calculate it as "number of pages * page size".
This makes alloc_sgt_from_device_pages() less clear, because the
exported size parameter is not understood as a restriction on the pages'
size.
Modify to always pass the exported size explicitly.

Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Tomer Tayar 2023-08-04 17:12:58 +03:00 committed by Oded Gabbay
parent 051868d93c
commit dfdbc55a9c
1 changed files with 2 additions and 3 deletions
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5
drivers/accel/habanalabs/common/memory.c
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@ -1561,8 +1561,7 @@ static struct sg_table *alloc_sgt_from_device_pages(struct hl_device *hdev, u64
if (!sgt)
return ERR_PTR(-ENOMEM);
/* remove export size restrictions in case not explicitly defined */
cur_size_to_export = exported_size ? exported_size : (npages * page_size);
cur_size_to_export = exported_size;
/* If the size of each page is larger than the dma max segment size,
* then we can't combine pages and the number of entries in the SGL
@ -1728,7 +1727,7 @@ static struct sg_table *hl_map_dmabuf(struct dma_buf_attachment *attachment,
&hl_dmabuf->device_address,
1,
hl_dmabuf->dmabuf->size,
0,
hl_dmabuf->dmabuf->size,
attachment->dev,
dir);