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octeontx2-af: Use DMA_ATTR_FORCE_CONTIGUOUS attribute in DMA alloc

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CN10K platform requires physically contiguous memory for LMTST
operations which goes beyond a single page. Not having physically
contiguous memory will result in HW fetching transmit descriptors from
a wrong memory location.

Hence use DMA_ATTR_FORCE_CONTIGUOUS attribute while allocating
LMTST regions.

Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Geetha sowjanya 2021-08-22 17:32:23 +05:30 • committed by David S. Miller
parent 10df5a13ac
commit 73d33dbc07
1 changed files with 6 additions and 5 deletions
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11
drivers/net/ethernet/marvell/octeontx2/af/common.h
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@ -64,8 +64,8 @@ static inline int qmem_alloc(struct device *dev, struct qmem **q,
qmem->entry_sz = entry_sz; qmem->entry_sz = entry_sz;
qmem->alloc_sz = (qsize * entry_sz) + OTX2_ALIGN; qmem->alloc_sz = (qsize * entry_sz) + OTX2_ALIGN;
qmem->base = dma_alloc_coherent(dev, qmem->alloc_sz, qmem->base = dma_alloc_attrs(dev, qmem->alloc_sz, &qmem->iova,
&qmem->iova, GFP_KERNEL); GFP_KERNEL, DMA_ATTR_FORCE_CONTIGUOUS);
if (!qmem->base) if (!qmem->base)
return -ENOMEM; return -ENOMEM;
@ -84,9 +84,10 @@ static inline void qmem_free(struct device *dev, struct qmem *qmem)
return; return;
if (qmem->base) if (qmem->base)
dma_free_coherent(dev, qmem->alloc_sz, dma_free_attrs(dev, qmem->alloc_sz,
qmem->base - qmem->align, qmem->base - qmem->align,
qmem->iova - qmem->align); qmem->iova - qmem->align,
DMA_ATTR_FORCE_CONTIGUOUS);
devm_kfree(dev, qmem); devm_kfree(dev, qmem);
} }