scsi: lpfc: add Trunking support

Add trunking support to the driver. Trunking is found on more recent
asics. In general, trunking appears as a single "port" to the driver
and overall behavior doesn't differ. Link speed is reported as an
aggregate value, while link speed control is done on a per-physical
link basis with all links in the trunk symmetrical. Some commands
returning port information are updated to additionally provide
trunking information. And new ACQEs are generated to report physical
link events relative to the trunk.

This patch contains the following modifications:

- Added link speed settings of 128GB and 256GB.

- Added handling of trunk-related ACQEs, mainly logging and trapping
  of physical link statuses.

- Added additional bsg interface to query trunk state by applications.

- Augment link_state sysfs attribtute to display trunk link status

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, 13 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index 579c80b5099a..c23c29b451c2 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -335,6 +335,18 @@ enum hba_state {
 	LPFC_HBA_ERROR       =  -1
 };
 
+struct lpfc_trunk_link_state {
+	enum hba_state state;
+	uint8_t fault;
+};
+
+struct lpfc_trunk_link  {
+	struct lpfc_trunk_link_state link0,
+				     link1,
+				     link2,
+				     link3;
+};
+
 struct lpfc_vport {
 	struct lpfc_hba *phba;
 	struct list_head listentry;
@@ -684,6 +696,7 @@ struct lpfc_hba {
 	uint32_t iocb_cmd_size;
 	uint32_t iocb_rsp_size;
 
+	struct lpfc_trunk_link  trunk_link;
 	enum hba_state link_state;
 	uint32_t link_flag;	/* link state flags */
 #define LS_LOOPBACK_MODE      0x1	/* NPort is in Loopback mode */