[SCSI] qla2xxx: Add support to dynamically enable/disable ZIO.
ISP23xx and ISP24xx chips have support for an adaptive
method of posting SCSI command completions for multiple SCSI
commands during a single system interrupt.
SCSI commands are placed on the system response queue
without interrupting the host until 1) a delay timer
expires; or 2) a SCSI command completes with an error.
As long as the host software (qla2xxx) services the response
queue for completions (this polling is done during
queuecommand()) within the 'delay timer' period, the
firmware will not generate system interrupt.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index b455c31..522bb2d 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -823,6 +823,11 @@
#define PD_STATE_WAIT_PORT_LOGOUT_ACK 11
+#define QLA_ZIO_MODE_5 (BIT_2 | BIT_0)
+#define QLA_ZIO_MODE_6 (BIT_2 | BIT_1)
+#define QLA_ZIO_DISABLED 0
+#define QLA_ZIO_DEFAULT_TIMER 2
+
/*
* ISP Initialization Control Block.
* Little endian except where noted.
@@ -2470,6 +2475,9 @@
/* Needed for BEACON */
uint16_t beacon_blink_led;
uint16_t beacon_green_on;
+
+ uint16_t zio_mode;
+ uint16_t zio_timer;
} scsi_qla_host_t;