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, 38 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_bsg.h b/drivers/scsi/lpfc/lpfc_bsg.h
index 820323f1139b..9151824beea4 100644
--- a/drivers/scsi/lpfc/lpfc_bsg.h
+++ b/drivers/scsi/lpfc/lpfc_bsg.h
@@ -42,6 +42,7 @@
 #define LPFC_BSG_VENDOR_RAS_GET_FWLOG		17
 #define LPFC_BSG_VENDOR_RAS_GET_CONFIG		18
 #define LPFC_BSG_VENDOR_RAS_SET_CONFIG		19
+#define LPFC_BSG_VENDOR_GET_TRUNK_INFO		20
 
 struct set_ct_event {
 	uint32_t command;
@@ -331,6 +332,43 @@ struct lpfc_bsg_get_ras_config_reply {
 	uint32_t log_buff_sz;
 };
 
+struct lpfc_trunk_info {
+	uint32_t word0;
+#define lpfc_trunk_info_link_status_SHIFT      0
+#define lpfc_trunk_info_link_status_MASK       1
+#define lpfc_trunk_info_link_status_WORD       word0
+#define lpfc_trunk_info_trunk_active0_SHIFT    8
+#define lpfc_trunk_info_trunk_active0_MASK     1
+#define lpfc_trunk_info_trunk_active0_WORD     word0
+#define lpfc_trunk_info_trunk_active1_SHIFT    9
+#define lpfc_trunk_info_trunk_active1_MASK     1
+#define lpfc_trunk_info_trunk_active1_WORD     word0
+#define lpfc_trunk_info_trunk_active2_SHIFT    10
+#define lpfc_trunk_info_trunk_active2_MASK     1
+#define lpfc_trunk_info_trunk_active2_WORD     word0
+#define lpfc_trunk_info_trunk_active3_SHIFT    11
+#define lpfc_trunk_info_trunk_active3_MASK     1
+#define lpfc_trunk_info_trunk_active3_WORD     word0
+#define lpfc_trunk_info_trunk_config0_SHIFT    12
+#define lpfc_trunk_info_trunk_config0_MASK     1
+#define lpfc_trunk_info_trunk_config0_WORD     word0
+#define lpfc_trunk_info_trunk_config1_SHIFT    13
+#define lpfc_trunk_info_trunk_config1_MASK     1
+#define lpfc_trunk_info_trunk_config1_WORD     word0
+#define lpfc_trunk_info_trunk_config2_SHIFT    14
+#define lpfc_trunk_info_trunk_config2_MASK     1
+#define lpfc_trunk_info_trunk_config2_WORD     word0
+#define lpfc_trunk_info_trunk_config3_SHIFT    15
+#define lpfc_trunk_info_trunk_config3_MASK     1
+#define lpfc_trunk_info_trunk_config3_WORD     word0
+	uint16_t    port_speed;
+	uint16_t    logical_speed;
+	uint32_t    reserved3;
+};
+
+struct get_trunk_info_req {
+	uint32_t command;
+};
 
 /* driver only */
 #define SLI_CONFIG_NOT_HANDLED		0