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>
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@ -80,6 +80,10 @@ static int msix_disable = -1;
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module_param(msix_disable, int, 0);
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module_param(msix_disable, int, 0);
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MODULE_PARM_DESC(msix_disable, " disable msix routed interrupts (default=0)");
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MODULE_PARM_DESC(msix_disable, " disable msix routed interrupts (default=0)");
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static int max_msix_vectors = -1;
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module_param(max_msix_vectors, int, 0);
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MODULE_PARM_DESC(max_msix_vectors, " max msix vectors ");
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static int mpt2sas_fwfault_debug;
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static int mpt2sas_fwfault_debug;
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MODULE_PARM_DESC(mpt2sas_fwfault_debug, " enable detection of firmware fault "
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MODULE_PARM_DESC(mpt2sas_fwfault_debug, " enable detection of firmware fault "
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"and halt firmware - (default=0)");
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"and halt firmware - (default=0)");
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@ -1402,6 +1406,16 @@ _base_enable_msix(struct MPT2SAS_ADAPTER *ioc)
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ioc->reply_queue_count = min_t(int, ioc->cpu_count,
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ioc->reply_queue_count = min_t(int, ioc->cpu_count,
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ioc->msix_vector_count);
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ioc->msix_vector_count);
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if (max_msix_vectors > 0) {
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ioc->reply_queue_count = min_t(int, max_msix_vectors,
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ioc->reply_queue_count);
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ioc->msix_vector_count = ioc->reply_queue_count;
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}
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printk(MPT2SAS_INFO_FMT
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"MSI-X vectors supported: %d, no of cores: %d, max_msix_vectors: %d\n",
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ioc->name, ioc->msix_vector_count, ioc->cpu_count, max_msix_vectors);
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entries = kcalloc(ioc->reply_queue_count, sizeof(struct msix_entry),
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entries = kcalloc(ioc->reply_queue_count, sizeof(struct msix_entry),
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GFP_KERNEL);
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GFP_KERNEL);
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if (!entries) {
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if (!entries) {
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