qla2xxx: Add support for online flash update for ISP27XX.

Signed-off-by: Sawan Chandak <sawan.chandak@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 7f6698a..cad7c6c 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -5348,6 +5348,93 @@ qla24xx_nvram_config(scsi_qla_host_t *vha)
 	return (rval);
 }
 
+uint8_t qla27xx_find_valid_image(struct scsi_qla_host *vha)
+{
+	struct qla27xx_image_status pri_image_status, sec_image_status;
+	uint8_t valid_pri_image, valid_sec_image;
+	uint32_t *wptr;
+	uint32_t cnt, chksum, size;
+	struct qla_hw_data *ha = vha->hw;
+
+	valid_pri_image = valid_sec_image = 1;
+	ha->active_image = 0;
+	size = sizeof(struct qla27xx_image_status) / sizeof(uint32_t);
+
+	if (!ha->flt_region_img_status_pri) {
+		valid_pri_image = 0;
+		goto check_sec_image;
+	}
+
+	qla24xx_read_flash_data(vha, (uint32_t *)(&pri_image_status),
+	    ha->flt_region_img_status_pri, size);
+
+	if (pri_image_status.signature != QLA27XX_IMG_STATUS_SIGN) {
+		ql_dbg(ql_dbg_init, vha, 0x018b,
+		    "Primary image signature (0x%x) not valid\n",
+		    pri_image_status.signature);
+		valid_pri_image = 0;
+		goto check_sec_image;
+	}
+
+	wptr = (uint32_t *)(&pri_image_status);
+	cnt = size;
+
+	for (chksum = 0; cnt; cnt--)
+		chksum += le32_to_cpu(*wptr++);
+	if (chksum) {
+		ql_dbg(ql_dbg_init, vha, 0x018c,
+		    "Checksum validation failed for primary image (0x%x)\n",
+		    chksum);
+		valid_pri_image = 0;
+	}
+
+check_sec_image:
+	if (!ha->flt_region_img_status_sec) {
+		valid_sec_image = 0;
+		goto check_valid_image;
+	}
+
+	qla24xx_read_flash_data(vha, (uint32_t *)(&sec_image_status),
+	    ha->flt_region_img_status_sec, size);
+
+	if (sec_image_status.signature != QLA27XX_IMG_STATUS_SIGN) {
+		ql_dbg(ql_dbg_init, vha, 0x018d,
+		    "Secondary image signature(0x%x) not valid\n",
+		    sec_image_status.signature);
+		valid_sec_image = 0;
+		goto check_valid_image;
+	}
+
+	wptr = (uint32_t *)(&sec_image_status);
+	cnt = size;
+	for (chksum = 0; cnt; cnt--)
+		chksum += le32_to_cpu(*wptr++);
+	if (chksum) {
+		ql_dbg(ql_dbg_init, vha, 0x018e,
+		    "Checksum validation failed for secondary image (0x%x)\n",
+		    chksum);
+		valid_sec_image = 0;
+	}
+
+check_valid_image:
+	if (valid_pri_image && (pri_image_status.image_status_mask & 0x1))
+		ha->active_image = QLA27XX_PRIMARY_IMAGE;
+	if (valid_sec_image && (sec_image_status.image_status_mask & 0x1)) {
+		if (!ha->active_image ||
+		    pri_image_status.generation_number <
+		    sec_image_status.generation_number)
+			ha->active_image = QLA27XX_SECONDARY_IMAGE;
+	}
+
+	ql_dbg(ql_dbg_init, vha, 0x018f, "%s image\n",
+	    ha->active_image == 0 ? "default bootld and fw" :
+	    ha->active_image == 1 ? "primary" :
+	    ha->active_image == 2 ? "secondary" :
+	    "Invalid");
+
+	return ha->active_image;
+}
+
 static int
 qla24xx_load_risc_flash(scsi_qla_host_t *vha, uint32_t *srisc_addr,
     uint32_t faddr)
@@ -5370,6 +5457,10 @@ qla24xx_load_risc_flash(scsi_qla_host_t *vha, uint32_t *srisc_addr,
 	dcode = (uint32_t *)req->ring;
 	*srisc_addr = 0;
 
+	if (IS_QLA27XX(ha) &&
+	    qla27xx_find_valid_image(vha) == QLA27XX_SECONDARY_IMAGE)
+		faddr = ha->flt_region_fw_sec;
+
 	/* Validate firmware image by checking version. */
 	qla24xx_read_flash_data(vha, dcode, faddr + 4, 4);
 	for (i = 0; i < 4; i++)