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authorTyrel Datwyler <tyreld@linux.ibm.com>2021-01-14 14:31:33 -0600
committerMartin K. Petersen <martin.petersen@oracle.com>2021-01-14 22:27:44 -0500
commit6d07f129dce28855870e4371af6a99257635f557 (patch)
tree903acdaacb2f7d3f190eadf66fdbecccc53c824b
parent9e6b6b81aafaf6e6d6d8f22e87b2cd9f2ffd66e8 (diff)
scsi: ibmvfc: Add Subordinate CRQ definitions
Subordinate Command Response Queues (Sub CRQ) are used in conjunction with the primary CRQ when more than one queue is needed by the virtual I/O adapter. Recent phyp firmware versions support Sub CRQ's with ibmvfc adapters. This feature is a prerequisite for supporting multiple hardware backed submission queues in the vfc adapter. The Sub CRQ command element differs from the standard CRQ in that it is 32bytes long as opposed to 16bytes for the latter. Despite this extra 16bytes the ibmvfc protocol will use the original CRQ command element mapped to the first 16bytes of the Sub CRQ element initially. Add definitions for the Sub CRQ command element and queue. Link: https://lore.kernel.org/r/20210114203148.246656-7-tyreld@linux.ibm.com Reviewed-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r--drivers/scsi/ibmvscsi/ibmvfc.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
index dd6d89292867..b9eed05c165f 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.h
+++ b/drivers/scsi/ibmvscsi/ibmvfc.h
@@ -650,6 +650,11 @@ struct ibmvfc_crq {
volatile __be64 ioba;
} __packed __aligned(8);
+struct ibmvfc_sub_crq {
+ struct ibmvfc_crq crq;
+ __be64 reserved[2];
+} __packed __aligned(8);
+
enum ibmvfc_ae_link_state {
IBMVFC_AE_LS_LINK_UP = 0x01,
IBMVFC_AE_LS_LINK_BOUNCED = 0x02,
@@ -761,12 +766,14 @@ struct ibmvfc_event_pool {
enum ibmvfc_msg_fmt {
IBMVFC_CRQ_FMT = 0,
IBMVFC_ASYNC_FMT,
+ IBMVFC_SUB_CRQ_FMT,
};
union ibmvfc_msgs {
void *handle;
struct ibmvfc_crq *crq;
struct ibmvfc_async_crq *async;
+ struct ibmvfc_sub_crq *scrq;
};
struct ibmvfc_queue {
@@ -781,6 +788,20 @@ struct ibmvfc_queue {
struct list_head sent;
struct list_head free;
spinlock_t l_lock;
+
+ /* Sub-CRQ fields */
+ struct ibmvfc_host *vhost;
+ unsigned long cookie;
+ unsigned long vios_cookie;
+ unsigned long hw_irq;
+ unsigned long irq;
+ unsigned long hwq_id;
+ char name[32];
+};
+
+struct ibmvfc_scsi_channels {
+ struct ibmvfc_queue *scrqs;
+ unsigned int active_queues;
};
enum ibmvfc_host_action {