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qla2xxx: Add framework for async fabric discovery

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Currently code performs a full scan of the fabric for
every RSCN. Its an expensive process in a noisy large SAN.

This patch optimizes expensive fabric discovery process by
scanning switch for the affected port when RSCN is received.

Currently Initiator Mode code makes login/logout decision without
knowledge of target mode. This causes driver and firmware to go
out-of-sync. This framework synchronizes both initiator mode
personality and target mode personality in making login/logout
decision.

This patch adds following capabilities in the driver

- Send Notification Acknowledgement asynchronously.
- Update session/fcport state asynchronously.
- Create a session or fcport struct asynchronously.
- Send GNL asynchronously. The command will ask FW to
  provide a list of FC Port entries FW knows about.
- Send GPDB asynchronously. The command will ask FW to
  provide detail data of an FC Port FW knows about or
  perform ADISC to verify the state of the session.
- Send GPNID asynchronously. The command will ask switch
  to provide WWPN for provided NPort ID.
- Send GPSC asynchronously. The command will ask switch
  to provide registered port speed for provided WWPN.
- Send GIDPN asynchronously. The command will ask the
  switch to provide Nport ID for provided WWPN.
- In driver unload path, schedule all session for deletion
  and wait for deletion to complete before allowing driver
  unload to proceed.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
[ bvanassche: fixed spelling in patch description ]
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Quinn Tran
2017-01-19 22:28:00 -08:00
committed by Nicholas Bellinger
parent 5d964837c6
commit 726b854870
13 changed files with 3111 additions and 984 deletions
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31
drivers/scsi/qla2xxx/qla_fw.h
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@@ -72,6 +72,37 @@ struct port_database_24xx {
uint8_t reserved_3[24];
};
/*
* MB 75h returns a list of DB entries similar to port_database_24xx(64B).
* However, in this case it returns 1st 40 bytes.
*/
struct get_name_list_extended {
__le16 flags;
u8 current_login_state;
u8 last_login_state;
u8 hard_address[3];
u8 reserved_1;
u8 port_id[3];
u8 sequence_id;
__le16 port_timer;
__le16 nport_handle; /* N_PORT handle. */
__le16 receive_data_size;
__le16 reserved_2;
/* PRLI SVC Param are Big endian */
u8 prli_svc_param_word_0[2]; /* Bits 15-0 of word 0 */
u8 prli_svc_param_word_3[2]; /* Bits 15-0 of word 3 */
u8 port_name[WWN_SIZE];
u8 node_name[WWN_SIZE];
};
/* MB 75h: This is the short version of the database */
struct get_name_list {
u8 port_node_name[WWN_SIZE]; /* B7 most sig, B0 least sig */
__le16 nport_handle;
u8 reserved;
};
struct vp_database_24xx {
uint16_t vp_status;
uint8_t options;