[SCSI] qla2xxx: Add support for ISP82xx to capture dump (minidump) on failure.

Minidump allows us to catpure a snapshot of the firmware/hardware states at the
time of failure for further analysis.

[jejb: added missing #include <linux/vmalloc.h>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> ]
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 42 insertions, 8 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index a31e05f3bfd4..df0002f78805 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -23,11 +23,23 @@ qla2x00_sysfs_read_fw_dump(struct file *filp, struct kobject *kobj,
         struct scsi_qla_host *vha = shost_priv(dev_to_shost(container_of(kobj,
             struct device, kobj)));
         struct qla_hw_data *ha = vha->hw;
+        int rval = 0;
 
         if (ha->fw_dump_reading == 0)
                 return 0;
 
-        return memory_read_from_buffer(buf, count, &off, ha->fw_dump,
+        if (IS_QLA82XX(ha)) {
+                if (off < ha->md_template_size) {
+                        rval = memory_read_from_buffer(buf, count,
+                            &off, ha->md_tmplt_hdr, ha->md_template_size);
+                        return rval;
+                }
+                off -= ha->md_template_size;
+                rval = memory_read_from_buffer(buf, count,
+                    &off, ha->md_dump, ha->md_dump_size);
+                return rval;
+        } else
+                return memory_read_from_buffer(buf, count, &off, ha->fw_dump,
                                         ha->fw_dump_len);
 }
 
@@ -41,12 +53,6 @@ qla2x00_sysfs_write_fw_dump(struct file *filp, struct kobject *kobj,
         struct qla_hw_data *ha = vha->hw;
         int reading;
 
-        if (IS_QLA82XX(ha)) {
-                ql_dbg(ql_dbg_user, vha, 0x705b,
-                    "Firmware dump not supported for ISP82xx\n");
-                return count;
-        }
-
         if (off != 0)
                 return (0);
 
@@ -59,6 +65,10 @@ qla2x00_sysfs_write_fw_dump(struct file *filp, struct kobject *kobj,
                 ql_log(ql_log_info, vha, 0x705d,
                     "Firmware dump cleared on (%ld).\n", vha->host_no);
 
+                if (IS_QLA82XX(vha->hw)) {
+                        qla82xx_md_free(vha);
+                        qla82xx_md_prep(vha);
+                }
                 ha->fw_dump_reading = 0;
                 ha->fw_dumped = 0;
                 break;
@@ -75,7 +85,26 @@ qla2x00_sysfs_write_fw_dump(struct file *filp, struct kobject *kobj,
                 qla2x00_alloc_fw_dump(vha);
                 break;
         case 3:
-                qla2x00_system_error(vha);
+                if (IS_QLA82XX(ha)) {
+                        qla82xx_idc_lock(ha);
+                        qla82xx_set_reset_owner(vha);
+                        qla82xx_idc_unlock(ha);
+                } else
+                        qla2x00_system_error(vha);
+                break;
+        case 4:
+                if (IS_QLA82XX(ha)) {
+                        if (ha->md_tmplt_hdr)
+                                ql_dbg(ql_dbg_user, vha, 0x705b,
+                                    "MiniDump supported with this firmware.\n");
+                        else
+                                ql_dbg(ql_dbg_user, vha, 0x709d,
+                                    "MiniDump not supported with this firmware.\n");
+                }
+                break;
+        case 5:
+                if (IS_QLA82XX(ha))
+                        set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                 break;
         }
         return (count);
@@ -546,6 +575,11 @@ qla2x00_sysfs_write_reset(struct file *filp, struct kobject *kobj,
 
                 scsi_block_requests(vha->host);
                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+                if (IS_QLA82XX(ha)) {
+                        qla82xx_idc_lock(ha);
+                        qla82xx_set_reset_owner(vha);
+                        qla82xx_idc_unlock(ha);
+                }
                 qla2xxx_wake_dpc(vha);
                 qla2x00_wait_for_chip_reset(vha);
                 scsi_unblock_requests(vha->host);