scsi: megaraid_sas: Dump system registers for debugging

[linux-2.6-microblaze.git] / drivers / scsi / megaraid / megaraid_sas_base.c

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index e9acbe1..fb0ccba 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -2861,6 +2861,24 @@ megasas_dump(void *buf, int sz, int format)
        printk(KERN_CONT "\n");
 }
 
+/**
+ * megasas_dump_reg_set -      This function will print hexdump of register set
+ * @buf:                       Buffer to be dumped
+ * @sz:                                Size in bytes
+ * @format:                    Different formats of dumping e.g. format=n will
+ *                             cause only 'n' 32 bit words to be dumped in a
+ *                             single line.
+ */
+inline void
+megasas_dump_reg_set(void __iomem *reg_set)
+{
+       unsigned int i, sz = 256;
+       u32 __iomem *reg = (u32 __iomem *)reg_set;
+
+       for (i = 0; i < (sz / sizeof(u32)); i++)
+               printk("%08x: %08x\n", (i * 4), readl(&reg[i]));
+}
+
 /**
  * megasas_dump_fusion_io -    This function will print key details
  *                             of SCSI IO
@@ -3890,8 +3908,11 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
                                max_wait = MEGASAS_RESET_WAIT_TIME;
                                cur_state = MFI_STATE_FAULT;
                                break;
-                       } else
+                       } else {
+                               dev_printk(KERN_DEBUG, &instance->pdev->dev, "System Register set:\n");
+                               megasas_dump_reg_set(instance->reg_set);
                                return -ENODEV;
+                       }
 
                case MFI_STATE_WAIT_HANDSHAKE:
                        /*
@@ -3999,6 +4020,8 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
                default:
                        dev_printk(KERN_DEBUG, &instance->pdev->dev, "Unknown state 0x%x\n",
                               fw_state);
+                       dev_printk(KERN_DEBUG, &instance->pdev->dev, "System Register set:\n");
+                       megasas_dump_reg_set(instance->reg_set);
                        return -ENODEV;
                }
 
@@ -4021,6 +4044,8 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
                if (curr_abs_state == abs_state) {
                        dev_printk(KERN_DEBUG, &instance->pdev->dev, "FW state [%d] hasn't changed "
                               "in %d secs\n", fw_state, max_wait);
+                       dev_printk(KERN_DEBUG, &instance->pdev->dev, "System Register set:\n");
+                       megasas_dump_reg_set(instance->reg_set);
                        return -ENODEV;
                }