[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, 89 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index f7604ea1af83..a41137452c41 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -4186,3 +4186,92 @@ qla82xx_mbx_intr_disable(scsi_qla_host_t *vha)
 
         return rval;
 }
+
+int
+qla82xx_md_get_template_size(scsi_qla_host_t *vha)
+{
+        struct qla_hw_data *ha = vha->hw;
+        mbx_cmd_t mc;
+        mbx_cmd_t *mcp = &mc;
+        int rval = QLA_FUNCTION_FAILED;
+
+        ql_dbg(ql_dbg_mbx, vha, 0x111f, "Entered %s.\n", __func__);
+
+        memset(mcp->mb, 0 , sizeof(mcp->mb));
+        mcp->mb[0] = LSW(MBC_DIAGNOSTIC_MINIDUMP_TEMPLATE);
+        mcp->mb[1] = MSW(MBC_DIAGNOSTIC_MINIDUMP_TEMPLATE);
+        mcp->mb[2] = LSW(RQST_TMPLT_SIZE);
+        mcp->mb[3] = MSW(RQST_TMPLT_SIZE);
+
+        mcp->out_mb = MBX_3|MBX_2|MBX_1|MBX_0;
+        mcp->in_mb = MBX_14|MBX_13|MBX_12|MBX_11|MBX_10|MBX_9|MBX_8|
+            MBX_7|MBX_6|MBX_5|MBX_4|MBX_3|MBX_2|MBX_1|MBX_0;
+
+        mcp->flags = MBX_DMA_OUT|MBX_DMA_IN|IOCTL_CMD;
+        mcp->tov = MBX_TOV_SECONDS;
+        rval = qla2x00_mailbox_command(vha, mcp);
+
+        /* Always copy back return mailbox values. */
+        if (rval != QLA_SUCCESS) {
+                ql_dbg(ql_dbg_mbx, vha, 0x1120,
+                    "mailbox command FAILED=0x%x, subcode=%x.\n",
+                    (mcp->mb[1] << 16) | mcp->mb[0],
+                    (mcp->mb[3] << 16) | mcp->mb[2]);
+        } else {
+                ql_dbg(ql_dbg_mbx, vha, 0x1121, "Done %s.\n", __func__);
+                ha->md_template_size = ((mcp->mb[3] << 16) | mcp->mb[2]);
+                if (!ha->md_template_size) {
+                        ql_dbg(ql_dbg_mbx, vha, 0x1122,
+                            "Null template size obtained.\n");
+                        rval = QLA_FUNCTION_FAILED;
+                }
+        }
+        return rval;
+}
+
+int
+qla82xx_md_get_template(scsi_qla_host_t *vha)
+{
+        struct qla_hw_data *ha = vha->hw;
+        mbx_cmd_t mc;
+        mbx_cmd_t *mcp = &mc;
+        int rval = QLA_FUNCTION_FAILED;
+
+        ql_dbg(ql_dbg_mbx, vha, 0x1123, "Entered %s.\n", __func__);
+
+        ha->md_tmplt_hdr = dma_alloc_coherent(&ha->pdev->dev,
+           ha->md_template_size, &ha->md_tmplt_hdr_dma, GFP_KERNEL);
+        if (!ha->md_tmplt_hdr) {
+                ql_log(ql_log_warn, vha, 0x1124,
+                    "Unable to allocate memory for Minidump template.\n");
+                return rval;
+        }
+
+        memset(mcp->mb, 0 , sizeof(mcp->mb));
+        mcp->mb[0] = LSW(MBC_DIAGNOSTIC_MINIDUMP_TEMPLATE);
+        mcp->mb[1] = MSW(MBC_DIAGNOSTIC_MINIDUMP_TEMPLATE);
+        mcp->mb[2] = LSW(RQST_TMPLT);
+        mcp->mb[3] = MSW(RQST_TMPLT);
+        mcp->mb[4] = LSW(LSD(ha->md_tmplt_hdr_dma));
+        mcp->mb[5] = MSW(LSD(ha->md_tmplt_hdr_dma));
+        mcp->mb[6] = LSW(MSD(ha->md_tmplt_hdr_dma));
+        mcp->mb[7] = MSW(MSD(ha->md_tmplt_hdr_dma));
+        mcp->mb[8] = LSW(ha->md_template_size);
+        mcp->mb[9] = MSW(ha->md_template_size);
+
+        mcp->flags = MBX_DMA_OUT|MBX_DMA_IN|IOCTL_CMD;
+        mcp->tov = MBX_TOV_SECONDS;
+        mcp->out_mb = MBX_11|MBX_10|MBX_9|MBX_8|
+            MBX_7|MBX_6|MBX_5|MBX_4|MBX_3|MBX_2|MBX_1|MBX_0;
+        mcp->in_mb = MBX_3|MBX_2|MBX_1|MBX_0;
+        rval = qla2x00_mailbox_command(vha, mcp);
+
+        if (rval != QLA_SUCCESS) {
+                ql_dbg(ql_dbg_mbx, vha, 0x1125,
+                    "mailbox command FAILED=0x%x, subcode=%x.\n",
+                    ((mcp->mb[1] << 16) | mcp->mb[0]),
+                    ((mcp->mb[3] << 16) | mcp->mb[2]));
+        } else
+                ql_dbg(ql_dbg_mbx, vha, 0x1126, "Done %s.\n", __func__);
+        return rval;
+}