[SCSI] qla2xxx: Add critical temperature handling for ISPFX00.

Signed-off-by: Armen Baloyan <armen.baloyan@qlogic.com>
Acked-by: Srinivasa Rao <srinivasa.rao@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

5 files changed, 104 insertions, 17 deletions

diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c
index aa31f7ab78ce..b1b6bc150c81 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -11,7 +11,7 @@
  * ----------------------------------------------------------------------
  * |             Level            |   Last Value Used  |     Holes      |
  * ----------------------------------------------------------------------
- * | Module Init and Probe        |       0x0151       | 0x4b,0xba,0xfa |
+ * | Module Init and Probe        |       0x0152       | 0x4b,0xba,0xfa |
  * | Mailbox commands             |       0x1181       | 0x111a-0x111b  |
  * |                              |                    | 0x1155-0x1158  |
  * |                              |                    | 0x1018-0x1019  |
@@ -26,11 +26,11 @@
  * |                              |                    | 0x3036,0x3038  |
  * |                              |                    | 0x303a         |
  * | DPC Thread                   |       0x4022       | 0x4002,0x4013  |
- * | Async Events                 |       0x5081       | 0x502b-0x502f  |
+ * | Async Events                 |       0x5083       | 0x502b-0x502f  |
  * |                              |                    | 0x5047,0x5052  |
  * |                              |                    | 0x5040,0x5075  |
  * |                              |                    | 0x503d,0x5044  |
- * | Timer Routines               |       0x6011       |                |
+ * | Timer Routines               |       0x6012       |                |
  * | User Space Interactions      |       0x70dd       | 0x7018,0x702e, |
  * |                              |                    | 0x7020,0x7024, |
  * |                              |                    | 0x7039,0x7045, |
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index a494e2e74693..e5d3373e7aeb 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -3369,6 +3369,7 @@ typedef struct scsi_qla_host {
 #define PORT_UPDATE_NEEDED      24
 #define FX00_RESET_RECOVERY     25
 #define FX00_TARGET_SCAN        26
+#define FX00_CRITEMP_RECOVERY   27
 
         uint32_t        device_flags;
 #define SWITCH_FOUND            BIT_0
diff --git a/drivers/scsi/qla2xxx/qla_mr.c b/drivers/scsi/qla2xxx/qla_mr.c
index ab2ae8e26fea..27b8af8bc68e 100644
--- a/drivers/scsi/qla2xxx/qla_mr.c
+++ b/drivers/scsi/qla2xxx/qla_mr.c
@@ -1372,21 +1372,22 @@ qlafx00_configure_devices(scsi_qla_host_t *vha)
 }
 
 static void
-qlafx00_abort_isp_cleanup(scsi_qla_host_t *vha)
+qlafx00_abort_isp_cleanup(scsi_qla_host_t *vha, bool critemp)
 {
         struct qla_hw_data *ha = vha->hw;
         fc_port_t *fcport;
 
         vha->flags.online = 0;
-        ha->flags.chip_reset_done = 0;
         ha->mr.fw_hbt_en = 0;
-        clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
-        vha->qla_stats.total_isp_aborts++;
-
-        ql_log(ql_log_info, vha, 0x013f,
-            "Performing ISP error recovery - ha = %p.\n", ha);
 
-        ha->isp_ops->reset_chip(vha);
+        if (!critemp) {
+                ha->flags.chip_reset_done = 0;
+                clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+                vha->qla_stats.total_isp_aborts++;
+                ql_log(ql_log_info, vha, 0x013f,
+                    "Performing ISP error recovery - ha = %p.\n", ha);
+                ha->isp_ops->reset_chip(vha);
+        }
 
         if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
                 atomic_set(&vha->loop_state, LOOP_DOWN);
@@ -1406,12 +1407,19 @@ qlafx00_abort_isp_cleanup(scsi_qla_host_t *vha)
         }
 
         if (!ha->flags.eeh_busy) {
-                /* Requeue all commands in outstanding command list. */
-                qla2x00_abort_all_cmds(vha, DID_RESET << 16);
+                if (critemp) {
+                        qla2x00_abort_all_cmds(vha, DID_NO_CONNECT << 16);
+                } else {
+                        /* Requeue all commands in outstanding command list. */
+                        qla2x00_abort_all_cmds(vha, DID_RESET << 16);
+                }
         }
 
         qla2x00_free_irqs(vha);
-        set_bit(FX00_RESET_RECOVERY, &vha->dpc_flags);
+        if (critemp)
+                set_bit(FX00_CRITEMP_RECOVERY, &vha->dpc_flags);
+        else
+                set_bit(FX00_RESET_RECOVERY, &vha->dpc_flags);
 
         /* Clear the Interrupts */
         QLAFX00_CLR_INTR_REG(ha, QLAFX00_HST_INT_STS_BITS);
@@ -1498,6 +1506,7 @@ qlafx00_timer_routine(scsi_qla_host_t *vha)
         uint32_t fw_heart_beat;
         uint32_t aenmbx0;
         struct device_reg_fx00 __iomem *reg = &ha->iobase->ispfx00;
+        uint32_t tempc;
 
         /* Check firmware health */
         if (ha->mr.fw_hbt_cnt)
@@ -1569,6 +1578,29 @@ qlafx00_timer_routine(scsi_qla_host_t *vha)
                 ha->mr.old_aenmbx0_state = aenmbx0;
                 ha->mr.fw_reset_timer_tick--;
         }
+        if (test_bit(FX00_CRITEMP_RECOVERY, &vha->dpc_flags)) {
+                /*
+                 * Critical temperature recovery to be
+                 * performed in timer routine
+                 */
+                if (ha->mr.fw_critemp_timer_tick == 0) {
+                        tempc = QLAFX00_GET_TEMPERATURE(ha);
+                        ql_log(ql_dbg_timer, vha, 0x6012,
+                            "ISPFx00(%s): Critical temp timer, "
+                            "current SOC temperature: %d\n",
+                            __func__, tempc);
+                        if (tempc < ha->mr.critical_temperature) {
+                                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+                                clear_bit(FX00_CRITEMP_RECOVERY,
+                                    &vha->dpc_flags);
+                                qla2xxx_wake_dpc(vha);
+                        }
+                        ha->mr.fw_critemp_timer_tick =
+                            QLAFX00_CRITEMP_INTERVAL;
+                } else {
+                        ha->mr.fw_critemp_timer_tick--;
+                }
+        }
 }
 
 /*
@@ -1596,7 +1628,7 @@ qlafx00_reset_initialize(scsi_qla_host_t *vha)
 
         if (vha->flags.online) {
                 scsi_block_requests(vha->host);
-                qlafx00_abort_isp_cleanup(vha);
+                qlafx00_abort_isp_cleanup(vha, false);
         }
 
         ql_log(ql_log_info, vha, 0x0143,
@@ -1628,7 +1660,7 @@ qlafx00_abort_isp(scsi_qla_host_t *vha)
                 }
 
                 scsi_block_requests(vha->host);
-                qlafx00_abort_isp_cleanup(vha);
+                qlafx00_abort_isp_cleanup(vha, false);
         } else {
                 scsi_block_requests(vha->host);
                 clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
@@ -1722,6 +1754,16 @@ qlafx00_process_aen(struct scsi_qla_host *vha, struct qla_work_evt *evt)
                 aen_code = FCH_EVT_LINKDOWN;
                 aen_data = 0;
                 break;
+        case QLAFX00_MBA_TEMP_OVER:
+        case QLAFX00_MBA_TEMP_CRIT:     /* Critical temperature event */
+                ql_log(ql_log_info, vha, 0x5082,
+                    "Process critical temperature event "
+                    "aenmb[0]: %x\n",
+                    evt->u.aenfx.evtcode);
+                scsi_block_requests(vha->host);
+                qlafx00_abort_isp_cleanup(vha, true);
+                scsi_unblock_requests(vha->host);
+                break;
         }
 
         fc_host_post_event(vha->host, fc_get_event_number(),
@@ -1913,6 +1955,7 @@ qlafx00_fx_disc(scsi_qla_host_t *vha, fc_port_t *fcport, uint16_t fx_type)
                     sizeof(vha->hw->mr.uboot_version));
                 memcpy(&vha->hw->mr.fru_serial_num, pinfo->fru_serial_num,
                     sizeof(vha->hw->mr.fru_serial_num));
+                vha->hw->mr.critical_temperature = pinfo->nominal_temp_value;
         } else if (fx_type == FXDISC_GET_PORT_INFO) {
                 struct port_info_data *pinfo =
                     (struct port_info_data *) fdisc->u.fxiocb.rsp_addr;
@@ -2055,6 +2098,7 @@ qlafx00_initialize_adapter(scsi_qla_host_t *vha)
 {
         int     rval;
         struct qla_hw_data *ha = vha->hw;
+        uint32_t tempc;
 
         /* Clear adapter flags. */
         vha->flags.online = 0;
@@ -2105,6 +2149,11 @@ qlafx00_initialize_adapter(scsi_qla_host_t *vha)
         rval = qla2x00_init_rings(vha);
         ha->flags.chip_reset_done = 1;
 
+        tempc = QLAFX00_GET_TEMPERATURE(ha);
+        ql_dbg(ql_dbg_init, vha, 0x0152,
+            "ISPFx00(%s): Critical temp timer, current SOC temperature: 0x%x\n",
+            __func__, tempc);
+
         return rval;
 }
 
@@ -2854,6 +2903,17 @@ qlafx00_async_event(scsi_qla_host_t *vha)
                     ha->aenmb[0], ha->aenmb[1], ha->aenmb[2], ha->aenmb[3]);
                 data_size = 4;
                 break;
+
+        case QLAFX00_MBA_TEMP_OVER:     /* Over temperature event */
+        case QLAFX00_MBA_TEMP_CRIT:     /* Critical temperature event */
+                ql_log(ql_log_info, vha, 0x5083,
+                    "Asynchronous critical temperature event received "
+                    "aenmb[0]: %x\n",
+                ha->aenmb[0]);
+                qlafx00_post_aenfx_work(vha, ha->aenmb[0],
+                    (uint32_t *)ha->aenmb, 1);
+                break;
+
         default:
                 ha->aenmb[1] = RD_REG_WORD(&reg->aenmailbox1);
                 ha->aenmb[2] = RD_REG_WORD(&reg->aenmailbox2);
diff --git a/drivers/scsi/qla2xxx/qla_mr.h b/drivers/scsi/qla2xxx/qla_mr.h
index 179f8e42b1c0..982f7d3b14e7 100644
--- a/drivers/scsi/qla2xxx/qla_mr.h
+++ b/drivers/scsi/qla2xxx/qla_mr.h
@@ -329,11 +329,13 @@ struct config_info_data {
         uint64_t        adapter_id;
 
         uint32_t        cluster_key_len;
-        uint8_t         cluster_key[10];
+        uint8_t         cluster_key[16];
 
         uint64_t        cluster_master_id;
         uint64_t        cluster_slave_id;
         uint8_t         cluster_flags;
+        uint32_t        enabled_capabilities;
+        uint32_t        nominal_temp_value;
 } __packed;
 
 #define FXDISC_GET_CONFIG_INFO          0x01
@@ -346,6 +348,7 @@ struct config_info_data {
 #define QLAFX00_ICR_ENB_MASK            0x80000000
 #define QLAFX00_ICR_DIS_MASK            0x7fffffff
 #define QLAFX00_HST_RST_REG             0x18264
+#define QLAFX00_SOC_TEMP_REG            0x184C4
 #define QLAFX00_HST_TO_HBA_REG          0x20A04
 #define QLAFX00_HBA_TO_HOST_REG         0x21B70
 #define QLAFX00_HST_INT_STS_BITS        0x7
@@ -361,6 +364,9 @@ struct config_info_data {
 #define QLAFX00_INTR_ALL_CMPLT          0x7
 
 #define QLAFX00_MBA_SYSTEM_ERR          0x8002
+#define QLAFX00_MBA_TEMP_OVER           0x8005
+#define QLAFX00_MBA_TEMP_NORM           0x8006
+#define QLAFX00_MBA_TEMP_CRIT           0x8007
 #define QLAFX00_MBA_LINK_UP             0x8011
 #define QLAFX00_MBA_LINK_DOWN           0x8012
 #define QLAFX00_MBA_PORT_UPDATE         0x8014
@@ -501,12 +507,31 @@ struct mr_data_fx00 {
         uint32_t old_fw_hbt_cnt;
         uint16_t fw_reset_timer_tick;
         uint8_t fw_reset_timer_exp;
+        uint16_t fw_critemp_timer_tick;
         uint32_t old_aenmbx0_state;
+        uint32_t critical_temperature;
 };
 
+/*
+ * SoC Junction Temperature is stored in
+ * bits 9:1 of SoC Junction Temperature Register
+ * in a firmware specific format format.
+ * To get the temperature in Celsius degrees
+ * the value from this bitfiled should be converted
+ * using this formula:
+ * Temperature (degrees C) = ((3,153,000 - (10,000 * X)) / 13,825)
+ * where X is the bit field value
+ * this macro reads the register, extracts the bitfield value,
+ * performs the calcualtions and returns temperature in Celsius
+ */
+#define QLAFX00_GET_TEMPERATURE(ha) ((3153000 - (10000 * \
+        ((QLAFX00_RD_REG(ha, QLAFX00_SOC_TEMP_REG) & 0x3FE) >> 1))) / 13825)
+
+
 #define QLAFX00_LOOP_DOWN_TIME          615     /* 600 */
 #define QLAFX00_HEARTBEAT_INTERVAL      6       /* number of seconds */
 #define QLAFX00_HEARTBEAT_MISS_CNT      3       /* number of miss */
 #define QLAFX00_RESET_INTERVAL          120     /* number of seconds */
 #define QLAFX00_MAX_RESET_INTERVAL      600     /* number of seconds */
+#define QLAFX00_CRITEMP_INTERVAL        60      /* number of seconds */
 #endif
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 17a86b69cb08..7a81ede19dde 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2575,6 +2575,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 ha->port_down_retry_count = 30; /* default value */
                 ha->mr.fw_hbt_cnt = QLAFX00_HEARTBEAT_INTERVAL;
                 ha->mr.fw_reset_timer_tick = QLAFX00_RESET_INTERVAL;
+                ha->mr.fw_critemp_timer_tick = QLAFX00_CRITEMP_INTERVAL;
                 ha->mr.fw_hbt_en = 1;
         }