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Commit 4910b524 authored by Anil Gurumurthy's avatar Anil Gurumurthy Committed by Martin K. Petersen
Browse files

scsi: qla2xxx: Add support for setting port speed 



This patch adds sysfs node

1. There is a new sysfs node port_speed
2. The possible values are 2(Auto neg), 8, 16, 32
3. A value outside of the above defaults to Auto neg
4. Any update to the setting causes a link toggle
5. This feature is currently only for ISP27xx

Signed-off-by: default avatarAnil Gurumurthy <agurumurthy@marvell.com>
Signed-off-by: default avatarQuinn Tran <qtran@marvell.com>
Signed-off-by: default avatarHimanshu Madhani <hmadhani@marvell.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 192c4e9b

drivers/scsi/qla2xxx/qla_attr.c

+89 −0
Original line number Diff line number Diff line
@@ -1632,6 +1632,92 @@ qla2x00_max_speed_sup_show(struct device *dev, struct device_attribute *attr, 
	    ha->max_speed_sup ? "32Gps" : "16Gps");

}



static ssize_t

qla2x00_port_speed_store(struct device *dev, struct device_attribute *attr,

    const char *buf, size_t count)

{

	struct scsi_qla_host *vha = shost_priv(dev_to_shost(dev));

	ulong type, speed;

	int oldspeed, rval;

	int mode = QLA_SET_DATA_RATE_LR;

	struct qla_hw_data *ha = vha->hw;



	if (!IS_QLA27XX(vha->hw)) {

		ql_log(ql_log_warn, vha, 0x70d8,

		    "Speed setting not supported \n");

		return -EINVAL;

	}



	rval = kstrtol(buf, 10, &type);

	speed = type;

	if (type == 40 || type == 80 || type == 160 ||

	    type == 320) {

		ql_dbg(ql_dbg_user, vha, 0x70d9,

		    "Setting will be affected after a loss of sync\n");

		type = type/10;

		mode = QLA_SET_DATA_RATE_NOLR;

	}



	oldspeed = ha->set_data_rate;



	switch (type) {

	case 0:

		ha->set_data_rate = PORT_SPEED_AUTO;

		break;

	case 4:

		ha->set_data_rate = PORT_SPEED_4GB;

		break;

	case 8:

		ha->set_data_rate = PORT_SPEED_8GB;

		break;

	case 16:

		ha->set_data_rate = PORT_SPEED_16GB;

		break;

	case 32:

		ha->set_data_rate = PORT_SPEED_32GB;

		break;

	default:

		ql_log(ql_log_warn, vha, 0x1199,

		    "Unrecognized speed setting:%lx. Setting Autoneg\n",

		    speed);

		ha->set_data_rate = PORT_SPEED_AUTO;

	}



	if (qla2x00_chip_is_down(vha) || (oldspeed == ha->set_data_rate))

		return -EINVAL;



	ql_log(ql_log_info, vha, 0x70da,

	    "Setting speed to %lx Gbps \n", type);



	rval = qla2x00_set_data_rate(vha, mode);

	if (rval != QLA_SUCCESS)

		return -EIO;



	return strlen(buf);

}



static ssize_t

qla2x00_port_speed_show(struct device *dev, struct device_attribute *attr,

    char *buf)

{

	struct scsi_qla_host *vha = shost_priv(dev_to_shost(dev));

	struct qla_hw_data *ha = vha->hw;

	ssize_t rval;

	char *spd[7] = {"0", "0", "0", "4", "8", "16", "32"};



	rval = qla2x00_get_data_rate(vha);

	if (rval != QLA_SUCCESS) {

		ql_log(ql_log_warn, vha, 0x70db,

		    "Unable to get port speed rval:%zd\n", rval);

		return -EINVAL;

	}



	ql_log(ql_log_info, vha, 0x70d6,

	    "port speed:%d\n", ha->link_data_rate);



	return scnprintf(buf, PAGE_SIZE, "%s\n", spd[ha->link_data_rate]);

}



/* ----- */



static ssize_t
@@ -2128,6 +2214,8 @@ static DEVICE_ATTR_RW(ql2xexchoffld); 
static DEVICE_ATTR_RW(ql2xiniexchg);

static DEVICE_ATTR(dif_bundle_statistics, 0444,

    qla2x00_dif_bundle_statistics_show, NULL);

static DEVICE_ATTR(port_speed, 0644, qla2x00_port_speed_show,

    qla2x00_port_speed_store);





struct device_attribute *qla2x00_host_attrs[] = {
@@ -2167,6 +2255,7 @@ struct device_attribute *qla2x00_host_attrs[] = { 
	&dev_attr_max_speed_sup,

	&dev_attr_zio_threshold,

	&dev_attr_dif_bundle_statistics,

	&dev_attr_port_speed,

	NULL, /* reserve for qlini_mode */

	NULL, /* reserve for ql2xiniexchg */

	NULL, /* reserve for ql2xexchoffld */

drivers/scsi/qla2xxx/qla_def.h

+6 −0
Original line number Diff line number Diff line
@@ -3698,12 +3698,14 @@ struct qla_hw_data { 
#define PORT_SPEED_UNKNOWN 0xFFFF

#define PORT_SPEED_1GB  0x00

#define PORT_SPEED_2GB  0x01

#define PORT_SPEED_AUTO 0x02

#define PORT_SPEED_4GB  0x03

#define PORT_SPEED_8GB  0x04

#define PORT_SPEED_16GB 0x05

#define PORT_SPEED_32GB 0x06

#define PORT_SPEED_10GB	0x13

	uint16_t	link_data_rate;         /* F/W operating speed */

	uint16_t	set_data_rate;		/* Set by user */



	uint8_t		current_topology;

	uint8_t		prev_topology;
@@ -4232,6 +4234,10 @@ struct qla_hw_data { 
#define FW_ABILITY_MAX_SPEED(ha)	\

	(ha->fw_ability_mask & FW_ABILITY_MAX_SPEED_MASK)



#define QLA_GET_DATA_RATE	0

#define QLA_SET_DATA_RATE_NOLR	1

#define QLA_SET_DATA_RATE_LR	2 /* Set speed and initiate LR */



/*

 * Qlogic scsi host structure

 */

drivers/scsi/qla2xxx/qla_gbl.h

+1 −0
Original line number Diff line number Diff line
@@ -899,5 +899,6 @@ void qlt_update_host_map(struct scsi_qla_host *, port_id_t); 
void qlt_remove_target_resources(struct qla_hw_data *);

void qlt_clr_qp_table(struct scsi_qla_host *vha);

void qlt_set_mode(struct scsi_qla_host *);

int qla2x00_set_data_rate(scsi_qla_host_t *vha, uint16_t mode);



#endif /* _QLA_GBL_H */

drivers/scsi/qla2xxx/qla_init.c

+9 −0
Original line number Diff line number Diff line
@@ -3882,8 +3882,17 @@ qla24xx_config_rings(struct scsi_qla_host *vha) 
		WRT_REG_DWORD(&reg->isp24.rsp_q_in, 0);

		WRT_REG_DWORD(&reg->isp24.rsp_q_out, 0);

	}



	qlt_24xx_config_rings(vha);



	/* If the user has configured the speed, set it here */

	if (ha->set_data_rate) {

		ql_dbg(ql_dbg_init, vha, 0x00fd,

		    "Speed set by user : %s Gbps \n",

		    qla2x00_get_link_speed_str(ha, ha->set_data_rate));

		icb->firmware_options_3 = (ha->set_data_rate << 13);

	}



	/* PCI posting */

	RD_REG_DWORD(&ioreg->hccr);

}

drivers/scsi/qla2xxx/qla_mbx.c

+61 −1
Original line number Diff line number Diff line
@@ -5250,6 +5250,66 @@ qla81xx_write_mpi_register(scsi_qla_host_t *vha, uint16_t *mb) 
	return rval;

}



/* Set the specified data rate */

int

qla2x00_set_data_rate(scsi_qla_host_t *vha, uint16_t mode)

{

	int rval;

	mbx_cmd_t mc;

	mbx_cmd_t *mcp = &mc;

	struct qla_hw_data *ha = vha->hw;

	uint16_t val;



	ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x1106,

	    "Entered %s speed:0x%x mode:0x%x.\n", __func__, ha->set_data_rate,

	    mode);



	if (!IS_FWI2_CAPABLE(ha))

		return QLA_FUNCTION_FAILED;



	memset(mcp, 0, sizeof(*mcp));

	switch (ha->set_data_rate) {

	case PORT_SPEED_AUTO:

	case PORT_SPEED_4GB:

	case PORT_SPEED_8GB:

	case PORT_SPEED_16GB:

	case PORT_SPEED_32GB:

		val = ha->set_data_rate;

		break;

	default:

		ql_log(ql_log_warn, vha, 0x1199,

		    "Unrecognized speed setting:%d. Setting Autoneg\n",

		    ha->set_data_rate);

		val = ha->set_data_rate = PORT_SPEED_AUTO;

		break;

	}



	mcp->mb[0] = MBC_DATA_RATE;

	mcp->mb[1] = mode;

	mcp->mb[2] = val;



	mcp->out_mb = MBX_2|MBX_1|MBX_0;

	mcp->in_mb = MBX_2|MBX_1|MBX_0;

	if (IS_QLA83XX(ha) || IS_QLA27XX(ha))

		mcp->in_mb |= MBX_4|MBX_3;

	mcp->tov = MBX_TOV_SECONDS;

	mcp->flags = 0;

	rval = qla2x00_mailbox_command(vha, mcp);

	if (rval != QLA_SUCCESS) {

		ql_dbg(ql_dbg_mbx, vha, 0x1107,

		    "Failed=%x mb[0]=%x.\n", rval, mcp->mb[0]);

	} else {

		if (mcp->mb[1] != 0x7)

			ql_dbg(ql_dbg_mbx, vha, 0x1179,

				"Speed set:0x%x\n", mcp->mb[1]);



		ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x1108,

		    "Done %s.\n", __func__);

	}



	return rval;

}



int

qla2x00_get_data_rate(scsi_qla_host_t *vha)

{
@@ -5265,7 +5325,7 @@ qla2x00_get_data_rate(scsi_qla_host_t *vha) 
		return QLA_FUNCTION_FAILED;



	mcp->mb[0] = MBC_DATA_RATE;

	mcp->mb[1] = 0;

	mcp->mb[1] = QLA_GET_DATA_RATE;

	mcp->out_mb = MBX_1|MBX_0;

	mcp->in_mb = MBX_2|MBX_1|MBX_0;

	if (IS_QLA83XX(ha) || IS_QLA27XX(ha))