diff options
| author | Sreekanth Reddy <sreekanth.reddy@avagotech.com> | 2014-09-12 15:35:16 +0530 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-09-16 09:14:12 -0700 |
| commit | 4e1f20ae4f92706518d6c18b13da8c2bc28339c7 (patch) | |
| tree | ed02428e3757647334b932d5ed127776e28bff99 /drivers/scsi/mpt2sas | |
| parent | 7c160fac54d81999e1a6df288d77b156705b36f9 (diff) | |
mpt2sas: Added driver module parameter max_msix_vectors
Added driver module parameter max_msix_vectors. Using this
module parameter the maximum number of MSI-X vectors could be set.
The number of MSI-X vectors used would be the minimum of MSI-X vectors
supported by the HBA, the number of CPU cores and the value set to
max_msix_vectors module parameters.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/mpt2sas')
| -rw-r--r-- | drivers/scsi/mpt2sas/mpt2sas_base.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c index cf51b48dd7d9..b1726280595a 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.c +++ b/drivers/scsi/mpt2sas/mpt2sas_base.c @@ -80,6 +80,10 @@ static int msix_disable = -1; module_param(msix_disable, int, 0); MODULE_PARM_DESC(msix_disable, " disable msix routed interrupts (default=0)"); +static int max_msix_vectors = -1; +module_param(max_msix_vectors, int, 0); +MODULE_PARM_DESC(max_msix_vectors, " max msix vectors "); + static int mpt2sas_fwfault_debug; MODULE_PARM_DESC(mpt2sas_fwfault_debug, " enable detection of firmware fault " "and halt firmware - (default=0)"); @@ -1402,6 +1406,16 @@ _base_enable_msix(struct MPT2SAS_ADAPTER *ioc) ioc->reply_queue_count = min_t(int, ioc->cpu_count, ioc->msix_vector_count); + if (max_msix_vectors > 0) { + ioc->reply_queue_count = min_t(int, max_msix_vectors, + ioc->reply_queue_count); + ioc->msix_vector_count = ioc->reply_queue_count; + } + + printk(MPT2SAS_INFO_FMT + "MSI-X vectors supported: %d, no of cores: %d, max_msix_vectors: %d\n", + ioc->name, ioc->msix_vector_count, ioc->cpu_count, max_msix_vectors); + entries = kcalloc(ioc->reply_queue_count, sizeof(struct msix_entry), GFP_KERNEL); if (!entries) { |