From 079eaddf2e5cd903565caf5118ff4907df8bad29 Mon Sep 17 00:00:00 2001 From: adam radford Date: Mon, 1 Oct 2012 19:26:59 -0700 Subject: [SCSI] megaraid_sas: Add module param for configurable MSI-X vector count Signed-off-by: Adam Radford Signed-off-by: James Bottomley --- drivers/scsi/megaraid/megaraid_sas_base.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 0393ec4..427a658 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -71,6 +71,10 @@ static int msix_disable; module_param(msix_disable, int, S_IRUGO); MODULE_PARM_DESC(msix_disable, "Disable MSI-X interrupt handling. Default: 0"); +static unsigned int msix_vectors; +module_param(msix_vectors, int, S_IRUGO); +MODULE_PARM_DESC(msix_vectors, "MSI-X max vector count. Default: Set by FW"); + static int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH; module_param(throttlequeuedepth, int, S_IRUGO); MODULE_PARM_DESC(throttlequeuedepth, @@ -3520,6 +3524,10 @@ static int megasas_init_fw(struct megasas_instance *instance) instance->msix_vectors = (readl(&instance->reg_set-> outbound_scratch_pad_2 ) & 0x1F) + 1; + if (msix_vectors) + instance->msix_vectors = + min(msix_vectors, + instance->msix_vectors); } else instance->msix_vectors = 1; /* Don't bother allocating more MSI-X vectors than cpus */ -- cgit v1.1