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-rw-r--r--drivers/scsi/aic94xx/aic94xx.h1
-rw-r--r--drivers/scsi/aic94xx/aic94xx_init.c2
-rw-r--r--drivers/scsi/aic94xx/aic94xx_tmf.c58
3 files changed, 56 insertions, 5 deletions
diff --git a/drivers/scsi/aic94xx/aic94xx.h b/drivers/scsi/aic94xx/aic94xx.h
index 32f513b1b78..eb8efdcefe4 100644
--- a/drivers/scsi/aic94xx/aic94xx.h
+++ b/drivers/scsi/aic94xx/aic94xx.h
@@ -102,6 +102,7 @@ int asd_abort_task_set(struct domain_device *, u8 *lun);
int asd_clear_aca(struct domain_device *, u8 *lun);
int asd_clear_task_set(struct domain_device *, u8 *lun);
int asd_lu_reset(struct domain_device *, u8 *lun);
+int asd_I_T_nexus_reset(struct domain_device *dev);
int asd_query_task(struct sas_task *);
/* ---------- Adapter and Port management ---------- */
diff --git a/drivers/scsi/aic94xx/aic94xx_init.c b/drivers/scsi/aic94xx/aic94xx_init.c
index 5d761eb6744..88d1e731b65 100644
--- a/drivers/scsi/aic94xx/aic94xx_init.c
+++ b/drivers/scsi/aic94xx/aic94xx_init.c
@@ -1003,7 +1003,7 @@ static struct sas_domain_function_template aic94xx_transport_functions = {
.lldd_abort_task_set = asd_abort_task_set,
.lldd_clear_aca = asd_clear_aca,
.lldd_clear_task_set = asd_clear_task_set,
- .lldd_I_T_nexus_reset = NULL,
+ .lldd_I_T_nexus_reset = asd_I_T_nexus_reset,
.lldd_lu_reset = asd_lu_reset,
.lldd_query_task = asd_query_task,
diff --git a/drivers/scsi/aic94xx/aic94xx_tmf.c b/drivers/scsi/aic94xx/aic94xx_tmf.c
index 144f5ad2045..d684c7432e6 100644
--- a/drivers/scsi/aic94xx/aic94xx_tmf.c
+++ b/drivers/scsi/aic94xx/aic94xx_tmf.c
@@ -140,8 +140,14 @@ int asd_clear_nexus_port(struct asd_sas_port *port)
CLEAR_NEXUS_POST;
}
-#if 0
-static int asd_clear_nexus_I_T(struct domain_device *dev)
+enum clear_nexus_phase {
+ NEXUS_PHASE_PRE,
+ NEXUS_PHASE_POST,
+ NEXUS_PHASE_RESUME,
+};
+
+static int asd_clear_nexus_I_T(struct domain_device *dev,
+ enum clear_nexus_phase phase)
{
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
struct asd_ascb *ascb;
@@ -150,12 +156,56 @@ static int asd_clear_nexus_I_T(struct domain_device *dev)
CLEAR_NEXUS_PRE;
scb->clear_nexus.nexus = NEXUS_I_T;
- scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ;
+ switch (phase) {
+ case NEXUS_PHASE_PRE:
+ scb->clear_nexus.flags = EXEC_Q | SUSPEND_TX;
+ break;
+ case NEXUS_PHASE_POST:
+ scb->clear_nexus.flags = SEND_Q | NOTINQ;
+ break;
+ case NEXUS_PHASE_RESUME:
+ scb->clear_nexus.flags = RESUME_TX;
+ }
scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
dev->lldd_dev);
CLEAR_NEXUS_POST;
}
-#endif
+
+int asd_I_T_nexus_reset(struct domain_device *dev)
+{
+ int res, tmp_res, i;
+ struct sas_phy *phy = sas_find_local_phy(dev);
+ /* Standard mandates link reset for ATA (type 0) and
+ * hard reset for SSP (type 1) */
+ int reset_type = (dev->dev_type == SATA_DEV ||
+ (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
+
+ asd_clear_nexus_I_T(dev, NEXUS_PHASE_PRE);
+ /* send a hard reset */
+ ASD_DPRINTK("sending %s reset to %s\n",
+ reset_type ? "hard" : "soft", phy->dev.bus_id);
+ res = sas_phy_reset(phy, reset_type);
+ if (res == TMF_RESP_FUNC_COMPLETE) {
+ /* wait for the maximum settle time */
+ msleep(500);
+ /* clear all outstanding commands (keep nexus suspended) */
+ asd_clear_nexus_I_T(dev, NEXUS_PHASE_POST);
+ }
+ for (i = 0 ; i < 3; i++) {
+ tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME);
+ if (tmp_res == TC_RESUME)
+ return res;
+ msleep(500);
+ }
+
+ /* This is a bit of a problem: the sequencer is still suspended
+ * and is refusing to resume. Hope it will resume on a bigger hammer
+ * or the disk is lost */
+ dev_printk(KERN_ERR, &phy->dev,
+ "Failed to resume nexus after reset 0x%x\n", tmp_res);
+
+ return TMF_RESP_FUNC_FAILED;
+}
static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun)
{