[SCSI] qla2xxx: Query additional RISC information during a pause.

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

2 files changed, 56 insertions, 1 deletions

diff --git a/drivers/scsi/qla2xxx/qla_fw.h b/drivers/scsi/qla2xxx/qla_fw.h
index d5344d7a8625..db63386f96b0 100644
--- a/drivers/scsi/qla2xxx/qla_fw.h
+++ b/drivers/scsi/qla2xxx/qla_fw.h
@@ -942,7 +942,9 @@ struct device_reg_24xx {
         uint16_t mailbox31;
 
         uint32_t iobase_window;
-        uint32_t unused_4[8];           /* Gap. */
+        uint32_t unused_4;              /* Gap. */
+        uint32_t iobase_c8;
+        uint32_t unused_4_1[6];         /* Gap. */
         uint32_t iobase_q;
         uint32_t unused_5[2];           /* Gap. */
         uint32_t iobase_select;
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index dcfb24b198f0..f61c2fe8eb59 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -6,6 +6,7 @@
  */
 #include "qla_def.h"
 
+#include <linux/delay.h>
 #include <scsi/scsi_tcq.h>
 
 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
@@ -1484,6 +1485,52 @@ qla24xx_process_response_queue(struct scsi_qla_host *ha)
         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
 }
 
+static void
+qla2xxx_check_risc_status(scsi_qla_host_t *ha)
+{
+        int rval;
+        uint32_t cnt;
+        struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
+
+        if (!IS_QLA25XX(ha))
+                return;
+
+        rval = QLA_SUCCESS;
+        WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
+        RD_REG_DWORD(&reg->iobase_addr);
+        WRT_REG_DWORD(&reg->iobase_window, 0x0001);
+        for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
+            rval == QLA_SUCCESS; cnt--) {
+                if (cnt) {
+                        WRT_REG_DWORD(&reg->iobase_window, 0x0001);
+                        udelay(10);
+                } else
+                        rval = QLA_FUNCTION_TIMEOUT;
+        }
+        if (rval == QLA_SUCCESS)
+                goto next_test;
+
+        WRT_REG_DWORD(&reg->iobase_window, 0x0003);
+        for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
+            rval == QLA_SUCCESS; cnt--) {
+                if (cnt) {
+                        WRT_REG_DWORD(&reg->iobase_window, 0x0003);
+                        udelay(10);
+                } else
+                        rval = QLA_FUNCTION_TIMEOUT;
+        }
+        if (rval != QLA_SUCCESS)
+                goto done;
+
+next_test:
+        if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
+                qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
+
+done:
+        WRT_REG_DWORD(&reg->iobase_window, 0x0000);
+        RD_REG_DWORD(&reg->iobase_window);
+}
+
 /**
  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
  * @irq:
@@ -1526,6 +1573,9 @@ qla24xx_intr_handler(int irq, void *dev_id)
 
                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
                             "Dumping firmware!\n", hccr);
+
+                        qla2xxx_check_risc_status(ha);
+
                         ha->isp_ops->fw_dump(ha, 1);
                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
                         break;
@@ -1663,6 +1713,9 @@ qla24xx_msix_default(int irq, void *dev_id)
 
                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
                             "Dumping firmware!\n", hccr);
+
+                        qla2xxx_check_risc_status(ha);
+
                         ha->isp_ops->fw_dump(ha, 1);
                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
                         break;