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Commit 079eaddf authored by Adam Radford's avatar Adam Radford Committed by James Bottomley
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[SCSI] megaraid_sas: Add module param for configurable MSI-X vector count 



Signed-off-by: default avatarAdam Radford <aradford@gmail.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 58af7b88

drivers/scsi/megaraid/megaraid_sas_base.c

+8 −0
Original line number Diff line number Diff line
@@ -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 */