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scsi: mpt3sas: Force reply post array allocations to be within same 4 GB region

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According to the MPI specification, reply post array buffers can not cross
a 4 GB boundary.

While allocating, if any buffer crosses the 4 GB boundary, then:

 - Release the already allocated memory pools; and

 - Reallocate them by changing the DMA coherent mask to 32-bit

Link: https://lore.kernel.org/r/20210305102904.7560-7-suganath-prabu.subramani@broadcom.com
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Suganath Prabu S 2021-03-05 15:59:03 +05:30 committed by Martin K. Petersen
parent 2e4e858732
commit c569de899b
1 changed files with 39 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

55
drivers/scsi/mpt3sas/mpt3sas_base.c
View file

@ -5629,6 +5629,39 @@ _base_allocate_reply_free_dma_pool(struct MPT3SAS_ADAPTER *ioc, u32 sz)
return 0;
}
/**
* _base_allocate_reply_post_free_array - Allocating DMA'able memory
* for reply post free array.
* @ioc: Adapter object
* @reply_post_free_array_sz: DMA Pool size
* Return: 0 for success, non-zero for failure.
*/
static int
_base_allocate_reply_post_free_array(struct MPT3SAS_ADAPTER *ioc,
u32 reply_post_free_array_sz)
{
ioc->reply_post_free_array_dma_pool =
dma_pool_create("reply_post_free_array pool",
&ioc->pdev->dev, reply_post_free_array_sz, 16, 0);
if (!ioc->reply_post_free_array_dma_pool)
return -ENOMEM;
ioc->reply_post_free_array =
dma_pool_alloc(ioc->reply_post_free_array_dma_pool,
GFP_KERNEL, &ioc->reply_post_free_array_dma);
if (!ioc->reply_post_free_array)
return -EAGAIN;
if (!mpt3sas_check_same_4gb_region((long)ioc->reply_post_free_array,
reply_post_free_array_sz)) {
dinitprintk(ioc, pr_err(
"Bad Reply Free Pool! Reply Free (0x%p) Reply Free dma = (0x%llx)\n",
ioc->reply_free,
(unsigned long long) ioc->reply_free_dma));
ioc->use_32bit_dma = true;
return -EAGAIN;
}
return 0;
}
/**
* base_alloc_rdpq_dma_pool - Allocating DMA'able memory
* for reply queues.
@ -6101,22 +6134,12 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc)
if (ioc->rdpq_array_enable) {
reply_post_free_array_sz = ioc->reply_queue_count *
sizeof(Mpi2IOCInitRDPQArrayEntry);
ioc->reply_post_free_array_dma_pool =
dma_pool_create("reply_post_free_array pool",
&ioc->pdev->dev, reply_post_free_array_sz, 16, 0);
if (!ioc->reply_post_free_array_dma_pool) {
dinitprintk(ioc,
ioc_info(ioc, "reply_post_free_array pool: dma_pool_create failed\n"));
goto out;
}
ioc->reply_post_free_array =
dma_pool_alloc(ioc->reply_post_free_array_dma_pool,
GFP_KERNEL, &ioc->reply_post_free_array_dma);
if (!ioc->reply_post_free_array) {
dinitprintk(ioc,
ioc_info(ioc, "reply_post_free_array pool: dma_pool_alloc failed\n"));
goto out;
}
rc = _base_allocate_reply_post_free_array(ioc,
reply_post_free_array_sz);
if (rc == -ENOMEM)
return -ENOMEM;
else if (rc == -EAGAIN)
goto try_32bit_dma;
}
ioc->config_page_sz = 512;
ioc->config_page = dma_alloc_coherent(&ioc->pdev->dev,