[SCSI] lpfc 8.2.3 : Added support for ASICs that report temperature

Added support for ASICs that report temperature. Temperature notices are
 reported as events and logged. Temperature can be read via sysfs.

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

9 files changed, 213 insertions, 2 deletions

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index ba3ecab9baf3..c1343fb2fcf4 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -569,6 +569,7 @@ struct lpfc_hba {
         atomic_t slow_ring_trc_cnt;
 #endif
 
+        uint8_t temp_sensor_support;
         /* Fields used for heart beat. */
         unsigned long last_completion_time;
         struct timer_list hb_tmofunc;
@@ -598,5 +599,15 @@ lpfc_is_link_up(struct lpfc_hba *phba)
                 phba->link_state == LPFC_HBA_READY;
 }
 
-#define FC_REG_DUMP_EVENT       0x10    /* Register for Dump events */
+#define FC_REG_DUMP_EVENT               0x10    /* Register for Dump events */
+#define FC_REG_TEMPERATURE_EVENT        0x20    /* Register for temperature
+                                                   event */
 
+struct temp_event {
+        uint32_t event_type;
+        uint32_t event_code;
+        uint32_t data;
+};
+#define LPFC_CRIT_TEMP          0x1
+#define LPFC_THRESHOLD_TEMP     0x2
+#define LPFC_NORMAL_TEMP        0x3
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 80a11218b9bb..bd35e9c7b995 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -86,6 +86,15 @@ lpfc_serialnum_show(struct class_device *cdev, char *buf)
 }
 
 static ssize_t
+lpfc_temp_sensor_show(struct class_device *cdev, char *buf)
+{
+        struct Scsi_Host *shost = class_to_shost(cdev);
+        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+        struct lpfc_hba   *phba = vport->phba;
+        return snprintf(buf, PAGE_SIZE, "%d\n",phba->temp_sensor_support);
+}
+
+static ssize_t
 lpfc_modeldesc_show(struct class_device *cdev, char *buf)
 {
         struct Scsi_Host  *shost = class_to_shost(cdev);
@@ -908,6 +917,8 @@ static CLASS_DEVICE_ATTR(used_rpi, S_IRUGO, lpfc_used_rpi_show, NULL);
 static CLASS_DEVICE_ATTR(max_xri, S_IRUGO, lpfc_max_xri_show, NULL);
 static CLASS_DEVICE_ATTR(used_xri, S_IRUGO, lpfc_used_xri_show, NULL);
 static CLASS_DEVICE_ATTR(npiv_info, S_IRUGO, lpfc_npiv_info_show, NULL);
+static CLASS_DEVICE_ATTR(lpfc_temp_sensor, S_IRUGO, lpfc_temp_sensor_show,
+                         NULL);
 
 
 static char *lpfc_soft_wwn_key = "C99G71SL8032A";
@@ -1494,6 +1505,7 @@ struct class_device_attribute *lpfc_hba_attrs[] = {
         &class_device_attr_state,
         &class_device_attr_num_discovered_ports,
         &class_device_attr_lpfc_drvr_version,
+        &class_device_attr_lpfc_temp_sensor,
         &class_device_attr_lpfc_log_verbose,
         &class_device_attr_lpfc_lun_queue_depth,
         &class_device_attr_lpfc_hba_queue_depth,
diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index a599e1510710..f3916645e817 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -23,6 +23,8 @@ typedef int (*node_filter)(struct lpfc_nodelist *ndlp, void *param);
 struct fc_rport;
 void lpfc_dump_mem(struct lpfc_hba *, LPFC_MBOXQ_t *, uint16_t);
 void lpfc_read_nv(struct lpfc_hba *, LPFC_MBOXQ_t *);
+void lpfc_config_async(struct lpfc_hba *, LPFC_MBOXQ_t *, uint32_t);
+
 void lpfc_heart_beat(struct lpfc_hba *, LPFC_MBOXQ_t *);
 int lpfc_read_la(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb,
                  struct lpfc_dmabuf *mp);
diff --git a/drivers/scsi/lpfc/lpfc_hw.h b/drivers/scsi/lpfc/lpfc_hw.h
index 451accd5564b..098dd022a7eb 100644
--- a/drivers/scsi/lpfc/lpfc_hw.h
+++ b/drivers/scsi/lpfc/lpfc_hw.h
@@ -1228,7 +1228,8 @@ typedef struct {		/* FireFly BIU registers */
 #define HS_FFER3       0x20000000       /* Bit 29 */
 #define HS_FFER2       0x40000000       /* Bit 30 */
 #define HS_FFER1       0x80000000       /* Bit 31 */
-#define HS_FFERM       0xFF000000       /* Mask for error bits 31:24 */
+#define HS_CRIT_TEMP   0x00000100       /* Bit 8  */
+#define HS_FFERM       0xFF000100       /* Mask for error bits 31:24 and 8 */
 
 /* Host Control Register */
 
@@ -1282,6 +1283,7 @@ typedef struct {		/* FireFly BIU registers */
 #define MBX_KILL_BOARD      0x24
 #define MBX_CONFIG_FARP     0x25
 #define MBX_BEACON          0x2A
+#define MBX_ASYNCEVT_ENABLE 0x33
 #define MBX_HEARTBEAT       0x31
 
 #define MBX_CONFIG_HBQ      0x7C
@@ -1344,6 +1346,7 @@ typedef struct {		/* FireFly BIU registers */
 
 /*  SLI_2 IOCB Command Set */
 
+#define CMD_ASYNC_STATUS        0x7C
 #define CMD_RCV_SEQUENCE64_CX   0x81
 #define CMD_XMIT_SEQUENCE64_CR  0x82
 #define CMD_XMIT_SEQUENCE64_CX  0x83
@@ -1406,6 +1409,8 @@ typedef struct {		/* FireFly BIU registers */
 #define MBX_BUSY                   0xffffff /* Attempted cmd to busy Mailbox */
 #define MBX_TIMEOUT                0xfffffe /* time-out expired waiting for */
 
+#define TEMPERATURE_OFFSET 0xB0 /* Slim offset for critical temperature event */
+
 /*
  *    Begin Structure Definitions for Mailbox Commands
  */
@@ -2606,6 +2611,18 @@ typedef struct {
         uint32_t IPAddress;
 } CONFIG_FARP_VAR;
 
+/* Structure for MB Command MBX_ASYNCEVT_ENABLE (0x33) */
+
+typedef struct {
+#ifdef __BIG_ENDIAN_BITFIELD
+        uint32_t rsvd:30;
+        uint32_t ring:2;        /* Ring for ASYNC_EVENT iocb Bits 0-1*/
+#else /*  __LITTLE_ENDIAN */
+        uint32_t ring:2;        /* Ring for ASYNC_EVENT iocb Bits 0-1*/
+        uint32_t rsvd:30;
+#endif
+} ASYNCEVT_ENABLE_VAR;
+
 /* Union of all Mailbox Command types */
 #define MAILBOX_CMD_WSIZE       32
 #define MAILBOX_CMD_SIZE        (MAILBOX_CMD_WSIZE * sizeof(uint32_t))
@@ -2645,6 +2662,7 @@ typedef union {
         CONFIG_PORT_VAR varCfgPort;     /* cmd = 0x88 (CONFIG_PORT)  */
         REG_VPI_VAR varRegVpi;          /* cmd = 0x96 (REG_VPI) */
         UNREG_VPI_VAR varUnregVpi;      /* cmd = 0x97 (UNREG_VPI) */
+        ASYNCEVT_ENABLE_VAR varCfgAsyncEvent; /*cmd = x33 (CONFIG_ASYNC) */
 } MAILVARIANTS;
 
 /*
@@ -2987,6 +3005,21 @@ typedef struct {
         uint32_t fcpt_Length;   /* transfer ready for IWRITE */
 } FCPT_FIELDS64;
 
+/* IOCB Command template for Async Status iocb commands */
+typedef struct {
+        uint32_t rsvd[4];
+        uint32_t param;
+#ifdef __BIG_ENDIAN_BITFIELD
+        uint16_t evt_code;              /* High order bits word 5 */
+        uint16_t sub_ctxt_tag;          /* Low  order bits word 5 */
+#else   /*  __LITTLE_ENDIAN_BITFIELD */
+        uint16_t sub_ctxt_tag;          /* High order bits word 5 */
+        uint16_t evt_code;              /* Low  order bits word 5 */
+#endif
+} ASYNCSTAT_FIELDS;
+#define ASYNC_TEMP_WARN         0x100
+#define ASYNC_TEMP_SAFE         0x101
+
 /* IOCB Command template for CMD_IOCB_RCV_ELS64_CX (0xB7)
    or CMD_IOCB_RCV_SEQ64_CX (0xB5) */
 
@@ -3028,6 +3061,7 @@ typedef struct _IOCB {	/* IOCB structure */
                 XMT_SEQ_FIELDS64 xseq64;        /* XMIT / BCAST cmd */
                 FCPI_FIELDS64 fcpi64;   /* FCP 64 bit Initiator template */
                 FCPT_FIELDS64 fcpt64;   /* FCP 64 bit target template */
+                ASYNCSTAT_FIELDS asyncstat; /* async_status iocb */
 
                 uint32_t ulpWord[IOCB_WORD_SZ - 2];     /* generic 6 'words' */
         } un;
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index ecebdfa00470..17f445478beb 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -212,6 +212,18 @@ out_free_mbox:
         return 0;
 }
 
+/* Completion handler for config async event mailbox command. */
+static void
+lpfc_config_async_cmpl(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmboxq)
+{
+        if (pmboxq->mb.mbxStatus == MBX_SUCCESS)
+                phba->temp_sensor_support = 1;
+        else
+                phba->temp_sensor_support = 0;
+        mempool_free(pmboxq, phba->mbox_mem_pool);
+        return;
+}
+
 /************************************************************************/
 /*                                                                      */
 /*    lpfc_config_port_post                                             */
@@ -409,7 +421,21 @@ lpfc_config_port_post(struct lpfc_hba *phba)
                 return -EIO;
         }
         /* MBOX buffer will be freed in mbox compl */
+        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+        lpfc_config_async(phba, pmb, LPFC_ELS_RING);
+        pmb->mbox_cmpl = lpfc_config_async_cmpl;
+        pmb->vport = phba->pport;
+        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
 
+        if ((rc != MBX_BUSY) && (rc != MBX_SUCCESS)) {
+                lpfc_printf_log(phba,
+                                KERN_ERR,
+                                LOG_INIT,
+                                "0456 Adapter failed to issue "
+                                "ASYNCEVT_ENABLE mbox status x%x \n.",
+                                rc);
+                mempool_free(pmb, phba->mbox_mem_pool);
+        }
         return (0);
 }
 
@@ -601,6 +627,8 @@ lpfc_handle_eratt(struct lpfc_hba *phba)
         struct lpfc_sli_ring  *pring;
         struct lpfc_vport **vports;
         uint32_t event_data;
+        unsigned long temperature;
+        struct temp_event temp_event_data;
         struct Scsi_Host  *shost;
         int i;
 
@@ -655,6 +683,33 @@ lpfc_handle_eratt(struct lpfc_hba *phba)
                         return;
                 }
                 lpfc_unblock_mgmt_io(phba);
+        } else if (phba->work_hs & HS_CRIT_TEMP) {
+                temperature = readl(phba->MBslimaddr + TEMPERATURE_OFFSET);
+                temp_event_data.event_type = FC_REG_TEMPERATURE_EVENT;
+                temp_event_data.event_code = LPFC_CRIT_TEMP;
+                temp_event_data.data = (uint32_t)temperature;
+
+                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+                                "0459 Adapter maximum temperature exceeded "
+                                "(%ld), taking this port offline "
+                                "Data: x%x x%x x%x\n",
+                                temperature, phba->work_hs,
+                                phba->work_status[0], phba->work_status[1]);
+
+                shost = lpfc_shost_from_vport(phba->pport);
+                fc_host_post_vendor_event(shost, fc_get_event_number(),
+                                          sizeof(temp_event_data),
+                                          (char *) &temp_event_data,
+                                          SCSI_NL_VID_TYPE_PCI
+                                          | PCI_VENDOR_ID_EMULEX);
+
+                psli->sli_flag &= ~LPFC_SLI2_ACTIVE;
+                lpfc_offline_prep(phba);
+                lpfc_offline(phba);
+                lpfc_unblock_mgmt_io(phba);
+                phba->link_state = LPFC_HBA_ERROR;
+                lpfc_hba_down_post(phba);
+
         } else {
                 /* The if clause above forces this code path when the status
                  * failure is a value other than FFER6.  Do not call the offline
diff --git a/drivers/scsi/lpfc/lpfc_logmsg.h b/drivers/scsi/lpfc/lpfc_logmsg.h
index 626e4d878725..c5841d7565f7 100644
--- a/drivers/scsi/lpfc/lpfc_logmsg.h
+++ b/drivers/scsi/lpfc/lpfc_logmsg.h
@@ -26,6 +26,7 @@
 #define LOG_IP                        0x20      /* IP traffic history */
 #define LOG_FCP                       0x40      /* FCP traffic history */
 #define LOG_NODE                      0x80      /* Node table events */
+#define LOG_TEMP                      0x100     /* Temperature sensor events */
 #define LOG_MISC                      0x400     /* Miscellaneous events */
 #define LOG_SLI                       0x800     /* SLI events */
 #define LOG_FCP_ERROR                 0x1000    /* log errors, not underruns */
diff --git a/drivers/scsi/lpfc/lpfc_mbox.c b/drivers/scsi/lpfc/lpfc_mbox.c
index a592733664e9..7256be3f4e2f 100644
--- a/drivers/scsi/lpfc/lpfc_mbox.c
+++ b/drivers/scsi/lpfc/lpfc_mbox.c
@@ -82,6 +82,24 @@ lpfc_read_nv(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb)
 }
 
 /**********************************************/
+/*  lpfc_config_async  Issue a                */
+/*  MBX_ASYNC_EVT_ENABLE mailbox command      */
+/**********************************************/
+void
+lpfc_config_async(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb,
+                uint32_t ring)
+{
+        MAILBOX_t *mb;
+
+        mb = &pmb->mb;
+        memset(pmb, 0, sizeof (LPFC_MBOXQ_t));
+        mb->mbxCommand = MBX_ASYNCEVT_ENABLE;
+        mb->un.varCfgAsyncEvent.ring = ring;
+        mb->mbxOwner = OWN_HOST;
+        return;
+}
+
+/**********************************************/
 /*  lpfc_heart_beat  Issue a HEART_BEAT       */
 /*                mailbox command             */
 /**********************************************/
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index ce348c5c706c..41f13a300ba5 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -199,6 +199,7 @@ lpfc_sli_iocb_cmd_type(uint8_t iocb_cmnd)
         case CMD_RCV_ELS_REQ_CX:
         case CMD_RCV_SEQUENCE64_CX:
         case CMD_RCV_ELS_REQ64_CX:
+        case CMD_ASYNC_STATUS:
         case CMD_IOCB_RCV_SEQ64_CX:
         case CMD_IOCB_RCV_ELS64_CX:
         case CMD_IOCB_RCV_CONT64_CX:
@@ -754,6 +755,7 @@ lpfc_sli_chk_mbx_command(uint8_t mbxCommand)
         case MBX_FLASH_WR_ULA:
         case MBX_SET_DEBUG:
         case MBX_LOAD_EXP_ROM:
+        case MBX_ASYNCEVT_ENABLE:
         case MBX_REG_VPI:
         case MBX_UNREG_VPI:
         case MBX_HEARTBEAT:
@@ -953,6 +955,7 @@ lpfc_sli_replace_hbqbuff(struct lpfc_hba *phba, uint32_t tag)
         return &new_hbq_entry->dbuf;
 }
 
+
 static int
 lpfc_sli_process_unsol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
                             struct lpfc_iocbq *saveq)
@@ -964,6 +967,22 @@ lpfc_sli_process_unsol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
 
         match = 0;
         irsp = &(saveq->iocb);
+
+        if (irsp->ulpCommand == CMD_ASYNC_STATUS) {
+                if (pring->lpfc_sli_rcv_async_status)
+                        pring->lpfc_sli_rcv_async_status(phba, pring, saveq);
+                else
+                        lpfc_printf_log(phba,
+                                        KERN_WARNING,
+                                        LOG_SLI,
+                                        "0316 Ring %d handler: unexpected "
+                                        "ASYNC_STATUS iocb received evt_code "
+                                        "0x%x\n",
+                                        pring->ringno,
+                                        irsp->un.asyncstat.evt_code);
+                return 1;
+        }
+
         if ((irsp->ulpCommand == CMD_RCV_ELS_REQ64_CX)
             || (irsp->ulpCommand == CMD_RCV_ELS_REQ_CX)
             || (irsp->ulpCommand == CMD_IOCB_RCV_ELS64_CX)
@@ -2993,6 +3012,61 @@ lpfc_extra_ring_setup( struct lpfc_hba *phba)
         return 0;
 }
 
+void
+lpfc_sli_async_event_handler(struct lpfc_hba * phba,
+        struct lpfc_sli_ring * pring, struct lpfc_iocbq * iocbq)
+{
+        IOCB_t *icmd;
+        uint16_t evt_code;
+        uint16_t temp;
+        struct temp_event temp_event_data;
+        struct Scsi_Host *shost;
+
+        icmd = &iocbq->iocb;
+        evt_code = icmd->un.asyncstat.evt_code;
+        temp = icmd->ulpContext;
+
+        if ((evt_code != ASYNC_TEMP_WARN) &&
+                (evt_code != ASYNC_TEMP_SAFE)) {
+                lpfc_printf_log(phba,
+                        KERN_ERR,
+                        LOG_SLI,
+                        "0327 Ring %d handler: unexpected ASYNC_STATUS"
+                        " evt_code 0x%x\n",
+                        pring->ringno,
+                        icmd->un.asyncstat.evt_code);
+                return;
+        }
+        temp_event_data.data = (uint32_t)temp;
+        temp_event_data.event_type = FC_REG_TEMPERATURE_EVENT;
+        if (evt_code == ASYNC_TEMP_WARN) {
+                temp_event_data.event_code = LPFC_THRESHOLD_TEMP;
+                lpfc_printf_log(phba,
+                                KERN_WARNING,
+                                LOG_TEMP,
+                                "0339 Adapter is very hot, please take "
+                                "corrective action. temperature : %d Celsius\n",
+                                temp);
+        }
+        if (evt_code == ASYNC_TEMP_SAFE) {
+                temp_event_data.event_code = LPFC_NORMAL_TEMP;
+                lpfc_printf_log(phba,
+                                KERN_INFO,
+                                LOG_TEMP,
+                                "0340 Adapter temperature is OK now. "
+                                "temperature : %d Celsius\n",
+                                temp);
+        }
+
+        /* Send temperature change event to applications */
+        shost = lpfc_shost_from_vport(phba->pport);
+        fc_host_post_vendor_event(shost, fc_get_event_number(),
+                sizeof(temp_event_data), (char *) &temp_event_data,
+                SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_EMULEX);
+
+}
+
+
 int
 lpfc_sli_setup(struct lpfc_hba *phba)
 {
@@ -3059,6 +3133,8 @@ lpfc_sli_setup(struct lpfc_hba *phba)
                         pring->fast_iotag = 0;
                         pring->iotag_ctr = 0;
                         pring->iotag_max = 4096;
+                        pring->lpfc_sli_rcv_async_status =
+                                lpfc_sli_async_event_handler;
                         pring->num_mask = 4;
                         pring->prt[0].profile = 0;      /* Mask 0 */
                         pring->prt[0].rctl = FC_ELS_REQ;
diff --git a/drivers/scsi/lpfc/lpfc_sli.h b/drivers/scsi/lpfc/lpfc_sli.h
index 51b2b6b949be..8b1fe2f62d84 100644
--- a/drivers/scsi/lpfc/lpfc_sli.h
+++ b/drivers/scsi/lpfc/lpfc_sli.h
@@ -166,6 +166,8 @@ struct lpfc_sli_ring {
 
         struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
         uint32_t num_mask;      /* number of mask entries in prt array */
+        void (*lpfc_sli_rcv_async_status) (struct lpfc_hba *,
+                struct lpfc_sli_ring *, struct lpfc_iocbq *);
 
         struct lpfc_sli_ring_stat stats;        /* SLI statistical info */