[SCSI] qla2xxx: Detect PEG errors.

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla2xxx/qla_dbg.c

@@ -20,7 +20,7 @@
  * | DPC Thread                   |       0x401c       |		|
  * | Async Events                 |       0x505d       | 0x502b-0x502f  |
  * |                              |                    | 0x5047,0x5052  |
- * | Timer Routines               |       0x6011       | 0x600e-0x600f  |
+ * | Timer Routines               |       0x6011       |                |
  * | User Space Interactions      |       0x709f       | 0x7018,0x702e, |
  * |                              |                    | 0x7039,0x7045, |
  * |                              |                    | 0x7073-0x7075, |

drivers/scsi/qla2xxx/qla_nx.c

@@ -3325,6 +3325,30 @@ exit:
 	return rval;
 }
 
+static int qla82xx_check_temp(scsi_qla_host_t *vha)
+{
+	uint32_t temp, temp_state, temp_val;
+	struct qla_hw_data *ha = vha->hw;
+
+	temp = qla82xx_rd_32(ha, CRB_TEMP_STATE);
+	temp_state = qla82xx_get_temp_state(temp);
+	temp_val = qla82xx_get_temp_val(temp);
+
+	if (temp_state == QLA82XX_TEMP_PANIC) {
+		ql_log(ql_log_warn, vha, 0x600e,
+		    "Device temperature %d degrees C exceeds "
+		    " maximum allowed. Hardware has been shut down.\n",
+		    temp_val);
+		return 1;
+	} else if (temp_state == QLA82XX_TEMP_WARN) {
+		ql_log(ql_log_warn, vha, 0x600f,
+		    "Device temperature %d degrees C exceeds "
+		    "operating range. Immediate action needed.\n",
+		    temp_val);
+	}
+	return 0;
+}
+
 void qla82xx_clear_pending_mbx(scsi_qla_host_t *vha)
 {
 	struct qla_hw_data *ha = vha->hw;
@@ -3347,7 +3371,11 @@ void qla82xx_watchdog(scsi_qla_host_t *vha)
 	/* don't poll if reset is going on */
 	if (!ha->flags.isp82xx_reset_hdlr_active) {
 		dev_state = qla82xx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
-		if (dev_state == QLA82XX_DEV_NEED_RESET &&
+		if (qla82xx_check_temp(vha)) {
+			set_bit(ISP_UNRECOVERABLE, &vha->dpc_flags);
+			ha->flags.isp82xx_fw_hung = 1;
+			qla82xx_clear_pending_mbx(vha);
+		} else if (dev_state == QLA82XX_DEV_NEED_RESET &&
 		    !test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags)) {
 			ql_log(ql_log_warn, vha, 0x6001,
 			    "Adapter reset needed.\n");

drivers/scsi/qla2xxx/qla_nx.h

@@ -26,6 +26,7 @@
 #define CRB_RCVPEG_STATE		QLA82XX_REG(0x13c)
 #define BOOT_LOADER_DIMM_STATUS		QLA82XX_REG(0x54)
 #define CRB_DMA_SHIFT			QLA82XX_REG(0xcc)
+#define CRB_TEMP_STATE			QLA82XX_REG(0x1b4)
 #define QLA82XX_DMA_SHIFT_VALUE		0x55555555
 
 #define QLA82XX_HW_H0_CH_HUB_ADR    0x05
@@ -1178,4 +1179,16 @@ static const int MD_MIU_TEST_AGT_RDDATA[] = { 0x410000A8, 0x410000AC,
 #define CRB_NIU_XG_PAUSE_CTL_P0        0x1
 #define CRB_NIU_XG_PAUSE_CTL_P1        0x8
 
+#define qla82xx_get_temp_val(x)          ((x) >> 16)
+#define qla82xx_get_temp_state(x)        ((x) & 0xffff)
+#define qla82xx_encode_temp(val, state)  (((val) << 16) | (state))
+
+/*
+ * Temperature control.
+ */
+enum {
+	QLA82XX_TEMP_NORMAL = 0x1, /* Normal operating range */
+	QLA82XX_TEMP_WARN,	   /* Sound alert, temperature getting high */
+	QLA82XX_TEMP_PANIC	   /* Fatal error, hardware has shut down. */
+};
 #endif