[SCSI] qla2xxx: Add Flash-Access-Control support for recent ISPs.

Given the low-level interface varies from one flash-part
manufacturer to the next, the Flash-Access-Control (FAC) mailbox
command makes the specific flash type transparent to the driver
by encapsulating a basic set of accessor and update routines.
Use these new routines where applicable by querying FAC opcode
get-sector-size at init-time.

Additional cleanups and
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index b380c6fdbe4..2bc08d3b353 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -3228,3 +3228,100 @@ qla81xx_idc_ack(scsi_qla_host_t *vha, uint16_t *mb)
 
 	return rval;
 }
+
+int
+qla81xx_fac_get_sector_size(scsi_qla_host_t *vha, uint32_t *sector_size)
+{
+	int rval;
+	mbx_cmd_t mc;
+	mbx_cmd_t *mcp = &mc;
+
+	if (!IS_QLA81XX(vha->hw))
+		return QLA_FUNCTION_FAILED;
+
+	DEBUG11(printk("%s(%ld): entered.\n", __func__, vha->host_no));
+
+	mcp->mb[0] = MBC_FLASH_ACCESS_CTRL;
+	mcp->mb[1] = FAC_OPT_CMD_GET_SECTOR_SIZE;
+	mcp->out_mb = MBX_1|MBX_0;
+	mcp->in_mb = MBX_1|MBX_0;
+	mcp->tov = MBX_TOV_SECONDS;
+	mcp->flags = 0;
+	rval = qla2x00_mailbox_command(vha, mcp);
+
+	if (rval != QLA_SUCCESS) {
+		DEBUG2_3_11(printk("%s(%ld): failed=%x mb[0]=%x mb[1]=%x.\n",
+		    __func__, vha->host_no, rval, mcp->mb[0], mcp->mb[1]));
+	} else {
+		DEBUG11(printk("%s(%ld): done.\n", __func__, vha->host_no));
+		*sector_size = mcp->mb[1];
+	}
+
+	return rval;
+}
+
+int
+qla81xx_fac_do_write_enable(scsi_qla_host_t *vha, int enable)
+{
+	int rval;
+	mbx_cmd_t mc;
+	mbx_cmd_t *mcp = &mc;
+
+	if (!IS_QLA81XX(vha->hw))
+		return QLA_FUNCTION_FAILED;
+
+	DEBUG11(printk("%s(%ld): entered.\n", __func__, vha->host_no));
+
+	mcp->mb[0] = MBC_FLASH_ACCESS_CTRL;
+	mcp->mb[1] = enable ? FAC_OPT_CMD_WRITE_ENABLE :
+	    FAC_OPT_CMD_WRITE_PROTECT;
+	mcp->out_mb = MBX_1|MBX_0;
+	mcp->in_mb = MBX_1|MBX_0;
+	mcp->tov = MBX_TOV_SECONDS;
+	mcp->flags = 0;
+	rval = qla2x00_mailbox_command(vha, mcp);
+
+	if (rval != QLA_SUCCESS) {
+		DEBUG2_3_11(printk("%s(%ld): failed=%x mb[0]=%x mb[1]=%x.\n",
+		    __func__, vha->host_no, rval, mcp->mb[0], mcp->mb[1]));
+	} else {
+		DEBUG11(printk("%s(%ld): done.\n", __func__, vha->host_no));
+	}
+
+	return rval;
+}
+
+int
+qla81xx_fac_erase_sector(scsi_qla_host_t *vha, uint32_t start, uint32_t finish)
+{
+	int rval;
+	mbx_cmd_t mc;
+	mbx_cmd_t *mcp = &mc;
+
+	if (!IS_QLA81XX(vha->hw))
+		return QLA_FUNCTION_FAILED;
+
+	DEBUG11(printk("%s(%ld): entered.\n", __func__, vha->host_no));
+
+	mcp->mb[0] = MBC_FLASH_ACCESS_CTRL;
+	mcp->mb[1] = FAC_OPT_CMD_ERASE_SECTOR;
+	mcp->mb[2] = LSW(start);
+	mcp->mb[3] = MSW(start);
+	mcp->mb[4] = LSW(finish);
+	mcp->mb[5] = MSW(finish);
+	mcp->out_mb = MBX_5|MBX_4|MBX_3|MBX_2|MBX_1|MBX_0;
+	mcp->in_mb = MBX_2|MBX_1|MBX_0;
+	mcp->tov = MBX_TOV_SECONDS;
+	mcp->flags = 0;
+	rval = qla2x00_mailbox_command(vha, mcp);
+
+	if (rval != QLA_SUCCESS) {
+		DEBUG2_3_11(printk("%s(%ld): failed=%x mb[0]=%x mb[1]=%x "
+		    "mb[2]=%x.\n", __func__, vha->host_no, rval, mcp->mb[0],
+		    mcp->mb[1], mcp->mb[2]));
+	} else {
+		DEBUG11(printk("%s(%ld): done.\n", __func__, vha->host_no));
+	}
+
+	return rval;
+}