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| author | adam radford <aradford@gmail.com> | 2012-10-02 06:26:59 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-10-09 14:12:30 +0400 |
| commit | 079eaddf2e5cd903565caf5118ff4907df8bad29 (patch) | |
| tree | 436adfe6f08cea086acf5eb6870b935688bad880 /drivers/scsi | |
| parent | 58af7b884fb17bf24fd8effeb6377a2aaaf13d62 (diff) | |
| download | linux-079eaddf2e5cd903565caf5118ff4907df8bad29.tar.xz | |
[SCSI] megaraid_sas: Add module param for configurable MSI-X vector count
Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_base.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 0393ec478cdf..427a658d44ab 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 */ |