[SCSI] qla2xxx: Add hardware trace-logging support.

Recent ISPs have a region within FLASH which acts as a repository
for the logging of serious hardware and software failures.
Currently, the region is large enough to support up to 255
entries.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/qla2xxx/qla_def.h

@@ -2118,6 +2118,7 @@ struct qla_msix_entry {
 /* Work events.  */
 enum qla_work_type {
 	QLA_EVT_AEN,
+	QLA_EVT_HWE_LOG,
 };
 
 
@@ -2132,6 +2133,10 @@ struct qla_work_evt {
 			enum fc_host_event_code code;
 			u32 data;
 		} aen;
+		struct {
+			uint16_t code;
+			uint16_t d1, d2, d3;
+		} hwe;
 	} u;
 };
 
@@ -2173,6 +2178,7 @@ typedef struct scsi_qla_host {
 		uint32_t        vsan_enabled            :1;
 		uint32_t	npiv_supported		:1;
 		uint32_t	fce_enabled		:1;
+		uint32_t	hw_event_marker_found	:1;
 	} flags;
 
 	atomic_t	loop_state;
@@ -2478,6 +2484,10 @@ typedef struct scsi_qla_host {
 	uint64_t	fce_wr, fce_rd;
 	struct mutex	fce_mutex;
 
+	uint32_t	hw_event_start;
+	uint32_t	hw_event_ptr;
+	uint32_t	hw_event_pause_errors;
+
 	uint8_t		host_str[16];
 	uint32_t	pci_attr;
 	uint16_t	chip_revision;

drivers/scsi/qla2xxx/qla_fw.h

@@ -793,7 +793,19 @@ struct device_reg_24xx {
 #define FA_VPD_NVRAM_ADDR	0x48000
 #define FA_FEATURE_ADDR		0x4C000
 #define FA_FLASH_DESCR_ADDR	0x50000
-#define FA_HW_EVENT_ADDR	0x54000
+#define FA_HW_EVENT0_ADDR	0x54000
+#define FA_HW_EVENT1_ADDR	0x54200
+#define FA_HW_EVENT_SIZE	0x200
+#define FA_HW_EVENT_ENTRY_SIZE	4
+/*
+ * Flash Error Log Event Codes.
+ */
+#define HW_EVENT_RESET_ERR	0xF00B
+#define HW_EVENT_ISP_ERR	0xF020
+#define HW_EVENT_PARITY_ERR	0xF022
+#define HW_EVENT_NVRAM_CHKSUM_ERR	0xF023
+#define HW_EVENT_FLASH_FW_ERR	0xF024
+
 #define FA_BOOT_LOG_ADDR	0x58000
 #define FA_FW_DUMP0_ADDR	0x60000
 #define FA_FW_DUMP1_ADDR	0x70000

drivers/scsi/qla2xxx/qla_gbl.h

@@ -69,6 +69,8 @@ extern int qla2x00_loop_reset(scsi_qla_host_t *);
 extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);
 extern int qla2x00_post_aen_work(struct scsi_qla_host *, enum
     fc_host_event_code, u32);
+extern int qla2x00_post_hwe_work(struct scsi_qla_host *, uint16_t , uint16_t,
+    uint16_t, uint16_t);
 
 /*
  * Global Functions in qla_mid.c source file.
@@ -298,6 +300,9 @@ extern uint8_t *qla25xx_read_optrom_data(struct scsi_qla_host *, uint8_t *,
 extern int qla2x00_get_flash_version(scsi_qla_host_t *, void *);
 extern int qla24xx_get_flash_version(scsi_qla_host_t *, void *);
 
+extern int qla2xxx_hw_event_log(scsi_qla_host_t *, uint16_t , uint16_t,
+    uint16_t, uint16_t);
+
 /*
  * Global Function Prototypes in qla_dbg.c source file.
  */

drivers/scsi/qla2xxx/qla_init.c

@@ -500,6 +500,7 @@ qla2x00_reset_chip(scsi_qla_host_t *ha)
 static inline void
 qla24xx_reset_risc(scsi_qla_host_t *ha)
 {
+	int hw_evt = 0;
 	unsigned long flags = 0;
 	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
 	uint32_t cnt, d2;
@@ -528,6 +529,8 @@ qla24xx_reset_risc(scsi_qla_host_t *ha)
 		d2 = (uint32_t) RD_REG_WORD(&reg->mailbox0);
 		barrier();
 	}
+	if (cnt == 0)
+		hw_evt = 1;
 
 	/* Wait for soft-reset to complete. */
 	d2 = RD_REG_DWORD(&reg->ctrl_status);
@@ -536,6 +539,10 @@ qla24xx_reset_risc(scsi_qla_host_t *ha)
 		d2 = RD_REG_DWORD(&reg->ctrl_status);
 		barrier();
 	}
+	if (cnt == 0 || hw_evt)
+		qla2xxx_hw_event_log(ha, HW_EVENT_RESET_ERR,
+		    RD_REG_WORD(&reg->mailbox1), RD_REG_WORD(&reg->mailbox2),
+		    RD_REG_WORD(&reg->mailbox3));
 
 	WRT_REG_DWORD(&reg->hccr, HCCRX_SET_RISC_RESET);
 	RD_REG_DWORD(&reg->hccr);
@@ -1555,6 +1562,10 @@ qla2x00_nvram_config(scsi_qla_host_t *ha)
 		qla_printk(KERN_WARNING, ha, "Falling back to functioning (yet "
 		    "invalid -- WWPN) defaults.\n");
 
+		if (chksum)
+			qla2xxx_hw_event_log(ha, HW_EVENT_NVRAM_CHKSUM_ERR, 0,
+			    MSW(chksum), LSW(chksum));
+
 		/*
 		 * Set default initialization control block.
 		 */

drivers/scsi/qla2xxx/qla_isr.c

@@ -349,6 +349,7 @@ qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 		    "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 		    mb[1], mb[2], mb[3]);
 
+		qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 		ha->isp_ops->fw_dump(ha, 1);
 
 		if (IS_FWI2_CAPABLE(ha)) {
@@ -373,6 +374,7 @@ qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 		    ha->host_no));
 		qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 
+		qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 		break;
 
@@ -381,6 +383,7 @@ qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 		    ha->host_no));
 		qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 
+		qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 		break;
 
@@ -1558,6 +1561,12 @@ qla24xx_intr_handler(int irq, void *dev_id)
 			if (pci_channel_offline(ha->pdev))
 				break;
 
+			if (ha->hw_event_pause_errors == 0)
+				qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
+				    0, MSW(stat), LSW(stat));
+			else if (ha->hw_event_pause_errors < 0xffffffff)
+				ha->hw_event_pause_errors++;
+
 			hccr = RD_REG_DWORD(&reg->hccr);
 
 			qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
@@ -1693,6 +1702,12 @@ qla24xx_msix_default(int irq, void *dev_id)
 			if (pci_channel_offline(ha->pdev))
 				break;
 
+			if (ha->hw_event_pause_errors == 0)
+				qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
+				    0, MSW(stat), LSW(stat));
+			else if (ha->hw_event_pause_errors < 0xffffffff)
+				ha->hw_event_pause_errors++;
+
 			hccr = RD_REG_DWORD(&reg->hccr);
 
 			qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "

drivers/scsi/qla2xxx/qla_mbx.c

@@ -587,6 +587,14 @@ qla2x00_mbx_reg_test(scsi_qla_host_t *ha)
 		if (mcp->mb[5] != 0xA5A5 || mcp->mb[6] != 0x5A5A ||
 		    mcp->mb[7] != 0x2525)
 			rval = QLA_FUNCTION_FAILED;
+		if (rval == QLA_FUNCTION_FAILED) {
+			struct device_reg_24xx __iomem *reg =
+			    &ha->iobase->isp24;
+
+			qla2xxx_hw_event_log(ha, HW_EVENT_ISP_ERR, 0,
+			    LSW(RD_REG_DWORD(&reg->hccr)),
+			    LSW(RD_REG_DWORD(&reg->istatus)));
+		}
 	}
 
 	if (rval != QLA_SUCCESS) {

drivers/scsi/qla2xxx/qla_os.c

@@ -1690,6 +1690,8 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 		ha->gid_list_info_size = 8;
 		ha->optrom_size = OPTROM_SIZE_25XX;
 		ha->isp_ops = &qla25xx_isp_ops;
+		ha->hw_event_start = PCI_FUNC(pdev->devfn) ?
+		    FA_HW_EVENT1_ADDR: FA_HW_EVENT0_ADDR;
 	}
 	host->can_queue = ha->request_q_length + 128;
 
@@ -2244,6 +2246,23 @@ qla2x00_post_aen_work(struct scsi_qla_host *ha, enum fc_host_event_code code,
 	return qla2x00_post_work(ha, e, 1);
 }
 
+int
+qla2x00_post_hwe_work(struct scsi_qla_host *ha, uint16_t code, uint16_t d1,
+    uint16_t d2, uint16_t d3)
+{
+	struct qla_work_evt *e;
+
+	e = qla2x00_alloc_work(ha, QLA_EVT_HWE_LOG, 1);
+	if (!e)
+		return QLA_FUNCTION_FAILED;
+
+	e->u.hwe.code = code;
+	e->u.hwe.d1 = d1;
+	e->u.hwe.d2 = d2;
+	e->u.hwe.d3 = d3;
+	return qla2x00_post_work(ha, e, 1);
+}
+
 static void
 qla2x00_do_work(struct scsi_qla_host *ha)
 {
@@ -2260,6 +2279,10 @@ qla2x00_do_work(struct scsi_qla_host *ha)
 			fc_host_post_event(ha->host, fc_get_event_number(),
 			    e->u.aen.code, e->u.aen.data);
 			break;
+		case QLA_EVT_HWE_LOG:
+			qla2xxx_hw_event_log(ha, e->u.hwe.code, e->u.hwe.d1,
+			    e->u.hwe.d2, e->u.hwe.d3);
+			break;
 		}
 		if (e->flags & QLA_EVT_FLAG_FREE)
 			kfree(e);