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scsi: mptfusion: Don't use GFP_ATOMIC for larger DMA allocations 

The mpt fusion driver still uses the legacy PCI DMA API which hardcodes
atomic allocations.  This caused the driver to fail to load on some powerpc
VMs with incoherent DMA and small memory sizes.  Switch to use the modern
DMA API and sleeping allocations for large allocations instead.  This is
not a full cleanup of the PCI DMA API usage yet, but just enough to fix the
regression caused by reducing the default atomic pool size.

Link: https://lore.kernel.org/r/20200624165724.1818496-1-hch@lst.de
Fixes: 3ee06a6d53 ("dma-pool: fix too large DMA pools on medium memory size systems")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2020-06-24 18:57:24 +02:00 committed by Martin K. Petersen
parent 823a65409c
commit 311950f8b8
1 changed files with 20 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/message/fusion/mptbase.c
View File

@ -1324,13 +1324,13 @@ mpt_host_page_alloc(MPT_ADAPTER *ioc, pIOCInit_t ioc_init)
return 0; /* fw doesn't need any host buffers */
/* spin till we get enough memory */
while(host_page_buffer_sz > 0) {
if((ioc->HostPageBuffer = pci_alloc_consistent(
ioc->pcidev,
host_page_buffer_sz,
&ioc->HostPageBuffer_dma)) != NULL) {
while (host_page_buffer_sz > 0) {
ioc->HostPageBuffer =
dma_alloc_coherent(&ioc->pcidev->dev,
host_page_buffer_sz,
&ioc->HostPageBuffer_dma,
GFP_KERNEL);
if (ioc->HostPageBuffer) {
dinitprintk(ioc, printk(MYIOC_s_DEBUG_FMT
"host_page_buffer @ %p, dma @ %x, sz=%d bytes\n",
ioc->name, ioc->HostPageBuffer,
@ -2741,8 +2741,8 @@ mpt_adapter_disable(MPT_ADAPTER *ioc)
sz = ioc->alloc_sz;
dexitprintk(ioc, printk(MYIOC_s_INFO_FMT "free @ %p, sz=%d bytes\n",
ioc->name, ioc->alloc, ioc->alloc_sz));
pci_free_consistent(ioc->pcidev, sz,
ioc->alloc, ioc->alloc_dma);
dma_free_coherent(&ioc->pcidev->dev, sz, ioc->alloc,
ioc->alloc_dma);
ioc->reply_frames = NULL;
ioc->req_frames = NULL;
ioc->alloc = NULL;
@ -2751,8 +2751,8 @@ mpt_adapter_disable(MPT_ADAPTER *ioc)
if (ioc->sense_buf_pool != NULL) {
sz = (ioc->req_depth * MPT_SENSE_BUFFER_ALLOC);
pci_free_consistent(ioc->pcidev, sz,
ioc->sense_buf_pool, ioc->sense_buf_pool_dma);
dma_free_coherent(&ioc->pcidev->dev, sz, ioc->sense_buf_pool,
ioc->sense_buf_pool_dma);
ioc->sense_buf_pool = NULL;
ioc->alloc_total -= sz;
}
@ -2802,7 +2802,7 @@ mpt_adapter_disable(MPT_ADAPTER *ioc)
"HostPageBuffer free @ %p, sz=%d bytes\n",
ioc->name, ioc->HostPageBuffer,
ioc->HostPageBuffer_sz));
pci_free_consistent(ioc->pcidev, ioc->HostPageBuffer_sz,
dma_free_coherent(&ioc->pcidev->dev, ioc->HostPageBuffer_sz,
ioc->HostPageBuffer, ioc->HostPageBuffer_dma);
ioc->HostPageBuffer = NULL;
ioc->HostPageBuffer_sz = 0;
@ -4497,7 +4497,8 @@ PrimeIocFifos(MPT_ADAPTER *ioc)
ioc->name, sz, sz, num_chain));
total_size += sz;
mem = pci_alloc_consistent(ioc->pcidev, total_size, &alloc_dma);
mem = dma_alloc_coherent(&ioc->pcidev->dev, total_size,
&alloc_dma, GFP_KERNEL);
if (mem == NULL) {
printk(MYIOC_s_ERR_FMT "Unable to allocate Reply, Request, Chain Buffers!\n",
ioc->name);
@ -4574,8 +4575,8 @@ PrimeIocFifos(MPT_ADAPTER *ioc)
spin_unlock_irqrestore(&ioc->FreeQlock, flags);
sz = (ioc->req_depth * MPT_SENSE_BUFFER_ALLOC);
ioc->sense_buf_pool =
pci_alloc_consistent(ioc->pcidev, sz, &ioc->sense_buf_pool_dma);
ioc->sense_buf_pool = dma_alloc_coherent(&ioc->pcidev->dev, sz,
&ioc->sense_buf_pool_dma, GFP_KERNEL);
if (ioc->sense_buf_pool == NULL) {
printk(MYIOC_s_ERR_FMT "Unable to allocate Sense Buffers!\n",
ioc->name);
@ -4613,18 +4614,16 @@ out_fail:
if (ioc->alloc != NULL) {
sz = ioc->alloc_sz;
pci_free_consistent(ioc->pcidev,
sz,
ioc->alloc, ioc->alloc_dma);
dma_free_coherent(&ioc->pcidev->dev, sz, ioc->alloc,
ioc->alloc_dma);
ioc->reply_frames = NULL;
ioc->req_frames = NULL;
ioc->alloc_total -= sz;
}
if (ioc->sense_buf_pool != NULL) {
sz = (ioc->req_depth * MPT_SENSE_BUFFER_ALLOC);
pci_free_consistent(ioc->pcidev,
sz,
ioc->sense_buf_pool, ioc->sense_buf_pool_dma);
dma_free_coherent(&ioc->pcidev->dev, sz, ioc->sense_buf_pool,
ioc->sense_buf_pool_dma);
ioc->sense_buf_pool = NULL;
}