scsi: lpfc: Replace io_channels for nvme and fcp with general hdw_queues per cpu

Currently, both nvme and fcp each have their own concept of an io_channel,
which is a combination wq/cq and associated msix.  Different cpus would
share an io_channel.

The driver is now moving to per-cpu wq/cq pairs and msix vectors.  The
driver will still use separate wq/cq pairs per protocol on each cpu, but
the protocols will share the msix vector.

Given the elimination of the nvme and fcp io channels, the module
parameters will be removed.  A new parameter, lpfc_hdw_queue is added which
allows the wq/cq pair allocation per cpu to be overridden and allocated to
lesser value. If lpfc_hdw_queue is zero, the number of pairs allocated will
be based on the number of cpus. If non-zero, the parameter specifies the
number of queues to allocate. At this time, the maximum non-zero value is
64.

To manage this new paradigm, a new hardware queue structure is created to
track queue activity and relationships.

As MSIX vector allocation must be known before setting up the
relationships, msix allocation now occurs before queue datastructures are
allocated. If the number of vectors allocated is less than the desired
hardware queues, the hardware queue counts will be reduced to the number of
vectors

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index 858a9a50f94d..da12476dd933 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -810,11 +810,10 @@ struct lpfc_hba {
 	uint32_t cfg_auto_imax;
 	uint32_t cfg_fcp_imax;
 	uint32_t cfg_fcp_cpu_map;
-	uint32_t cfg_fcp_io_channel;
+	uint32_t cfg_hdw_queue;
 	uint32_t cfg_suppress_rsp;
 	uint32_t cfg_nvme_oas;
 	uint32_t cfg_nvme_embed_cmd;
-	uint32_t cfg_nvme_io_channel;
 	uint32_t cfg_nvmet_mrq_post;
 	uint32_t cfg_nvmet_mrq;
 	uint32_t cfg_enable_nvmet;
@@ -877,7 +876,6 @@ struct lpfc_hba {
 #define LPFC_ENABLE_NVME 2
 #define LPFC_ENABLE_BOTH 3
 	uint32_t cfg_enable_pbde;
-	uint32_t io_channel_irqs;	/* number of irqs for io channels */
 	struct nvmet_fc_target_port *targetport;
 	lpfc_vpd_t vpd;		/* vital product data */