[SCSI] ibmvfc: Add support for NPIV Logout
This patch adds support for a new command supported by the Virtual I/O
Server, NPIV Logout. The command will abort all outstanding commands
and log out of the fabric. Currently, the only way to do this is
by breaking the CRQ, which can take a fairly long time when lots of
commands are outstanding. The NPIV Logout commands provides a mechanism
to accomplish virtually the same function, but is much faster.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
index 3a6a725..6adaad8 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.h
+++ b/drivers/scsi/ibmvscsi/ibmvfc.h
@@ -57,9 +57,10 @@
* Ensure we have resources for ERP and initialization:
* 1 for ERP
* 1 for initialization
+ * 1 for NPIV Logout
* 2 for each discovery thread
*/
-#define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + (disc_threads * 2))
+#define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + 1 + (disc_threads * 2))
#define IBMVFC_MAD_SUCCESS 0x00
#define IBMVFC_MAD_NOT_SUPPORTED 0xF1
@@ -127,6 +128,7 @@
IBMVFC_IMPLICIT_LOGOUT = 0x0040,
IBMVFC_PASSTHRU = 0x0200,
IBMVFC_TMF_MAD = 0x0100,
+ IBMVFC_NPIV_LOGOUT = 0x0800,
};
struct ibmvfc_mad_common {
@@ -143,6 +145,10 @@
struct srp_direct_buf buffer;
}__attribute__((packed, aligned (8)));
+struct ibmvfc_npiv_logout_mad {
+ struct ibmvfc_mad_common common;
+}__attribute__((packed, aligned (8)));
+
#define IBMVFC_MAX_NAME 256
struct ibmvfc_npiv_login {
@@ -561,6 +567,7 @@
union ibmvfc_iu {
struct ibmvfc_mad_common mad_common;
struct ibmvfc_npiv_login_mad npiv_login;
+ struct ibmvfc_npiv_logout_mad npiv_logout;
struct ibmvfc_discover_targets discover_targets;
struct ibmvfc_port_login plogi;
struct ibmvfc_process_login prli;
@@ -627,6 +634,8 @@
enum ibmvfc_host_action {
IBMVFC_HOST_ACTION_NONE = 0,
+ IBMVFC_HOST_ACTION_LOGO,
+ IBMVFC_HOST_ACTION_LOGO_WAIT,
IBMVFC_HOST_ACTION_INIT,
IBMVFC_HOST_ACTION_INIT_WAIT,
IBMVFC_HOST_ACTION_QUERY,
@@ -682,6 +691,7 @@
int reinit;
int delay_init;
int scan_complete;
+ int logged_in;
int events_to_log;
#define IBMVFC_AE_LINKUP 0x0001
#define IBMVFC_AE_LINKDOWN 0x0002