Commit e4e3a2ce authored by Quinn Tran's avatar Quinn Tran Committed by Martin K. Petersen
Browse files

scsi: qla2xxx: Add ability to autodetect SFP type 



SFP can come in 2 formats: short range/SR and long range/LR.  For LR,
user the can increase the number of Buffer to Buffer credits between end
points via Cavium's command line tool.  By default, FW uses a lower BB
Credit value optimized for SR.  This patch will read the SFP for each
link up event and during chip reset sequence. If the SFP type and
setting are mismatch, then the chip is reset 1 time to use the
appropriate setting.

Signed-off-by: default avatarQuinn Tran <quinn.tran@cavium.com>
Signed-off-by: default avatarHimanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent b2e8ae3f

drivers/scsi/qla2xxx/qla_attr.c

+6 −36
Original line number Diff line number Diff line
@@ -565,47 +565,17 @@ qla2x00_sysfs_read_sfp(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;

	uint16_t iter, addr, offset;

	int rval;



	if (!capable(CAP_SYS_ADMIN) || off != 0 || count != SFP_DEV_SIZE * 2)

	if (!capable(CAP_SYS_ADMIN) || off != 0 || count < SFP_DEV_SIZE)

		return 0;



	if (ha->sfp_data)

		goto do_read;



	ha->sfp_data = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,

	    &ha->sfp_data_dma);

	if (!ha->sfp_data) {

		ql_log(ql_log_warn, vha, 0x706c,

		    "Unable to allocate memory for SFP read-data.\n");

	if (qla2x00_reset_active(vha))

		return 0;

	}



do_read:

	memset(ha->sfp_data, 0, SFP_BLOCK_SIZE);

	addr = 0xa0;

	for (iter = 0, offset = 0; iter < (SFP_DEV_SIZE * 2) / SFP_BLOCK_SIZE;

	    iter++, offset += SFP_BLOCK_SIZE) {

		if (iter == 4) {

			/* Skip to next device address. */

			addr = 0xa2;

			offset = 0;

		}



		rval = qla2x00_read_sfp(vha, ha->sfp_data_dma, ha->sfp_data,

		    addr, offset, SFP_BLOCK_SIZE, BIT_1);

		if (rval != QLA_SUCCESS) {

			ql_log(ql_log_warn, vha, 0x706d,

			    "Unable to read SFP data (%x/%x/%x).\n", rval,

			    addr, offset);



	rval = qla2x00_read_sfp_dev(vha, buf, count);

	if (rval)

		return -EIO;

		}

		memcpy(buf, ha->sfp_data, SFP_BLOCK_SIZE);

		buf += SFP_BLOCK_SIZE;

	}



	return count;

}
@@ -615,7 +585,7 @@ static struct bin_attribute sysfs_sfp_attr = { 
		.name = "sfp",

		.mode = S_IRUSR | S_IWUSR,

	},

	.size = SFP_DEV_SIZE * 2,

	.size = SFP_DEV_SIZE,

	.read = qla2x00_sysfs_read_sfp,

};

drivers/scsi/qla2xxx/qla_def.h

+91 −1
Original line number Diff line number Diff line
@@ -3465,8 +3465,15 @@ struct qla_hw_data { 
		uint32_t	n2n_ae:1;

		uint32_t	fw_started:1;

		uint32_t	fw_init_done:1;



		uint32_t	detected_lr_sfp:1;

		uint32_t	using_lr_setting:1;

	} flags;



	u8 long_range_distance;	/* 32G & above */

#define LR_DISTANCE_5K  1

#define LR_DISTANCE_10K 0



	/* This spinlock is used to protect "io transactions", you must

	* acquire it before doing any IO to the card, eg with RD_REG*() and

	* WRT_REG*() for the duration of your entire commandtransaction.
@@ -3714,7 +3721,7 @@ struct qla_hw_data { 
	struct sns_cmd_pkt	*sns_cmd;

	dma_addr_t		sns_cmd_dma;



#define SFP_DEV_SIZE    256

#define SFP_DEV_SIZE    512

#define SFP_BLOCK_SIZE  64

	void		*sfp_data;

	dma_addr_t	sfp_data_dma;
@@ -4095,6 +4102,7 @@ typedef struct scsi_qla_host { 
#define FX00_HOST_INFO_RESEND	26

#define QPAIR_ONLINE_CHECK_NEEDED	27

#define SET_ZIO_THRESHOLD_NEEDED	28

#define DETECT_SFP_CHANGE	29



	unsigned long	pci_flags;

#define PFLG_DISCONNECTED	0	/* PCI device removed */
@@ -4378,6 +4386,88 @@ enum nexus_wait_type { 
	WAIT_LUN,

};



/* Refer to SNIA SFF 8247 */

struct sff_8247_a0 {

	u8 txid;	/* transceiver id */

	u8 ext_txid;

	u8 connector;

	/* compliance code */

	u8 eth_infi_cc3;	/* ethernet, inifiband */

	u8 sonet_cc4[2];

	u8 eth_cc6;

	/* link length */

#define FC_LL_VL BIT_7	/* very long */

#define FC_LL_S  BIT_6	/* Short */

#define FC_LL_I  BIT_5	/* Intermidiate*/

#define FC_LL_L  BIT_4	/* Long */

#define FC_LL_M  BIT_3	/* Medium */

#define FC_LL_SA BIT_2	/* ShortWave laser */

#define FC_LL_LC BIT_1	/* LongWave laser */

#define FC_LL_EL BIT_0	/* Electrical inter enclosure */

	u8 fc_ll_cc7;

	/* FC technology */

#define FC_TEC_EL BIT_7	/* Electrical inter enclosure */

#define FC_TEC_SN BIT_6	/* short wave w/o OFC */

#define FC_TEC_SL BIT_5	/* short wave with OFC */

#define FC_TEC_LL BIT_4	/* Longwave Laser */

#define FC_TEC_ACT BIT_3	/* Active cable */

#define FC_TEC_PAS BIT_2	/* Passive cable */

	u8 fc_tec_cc8;

	/* Transmission Media */

#define FC_MED_TW BIT_7	/* Twin Ax */

#define FC_MED_TP BIT_6	/* Twited Pair */

#define FC_MED_MI BIT_5	/* Min Coax */

#define FC_MED_TV BIT_4	/* Video Coax */

#define FC_MED_M6 BIT_3	/* Multimode, 62.5um */

#define FC_MED_M5 BIT_2	/* Multimode, 50um */

#define FC_MED_SM BIT_0	/* Single Mode */

	u8 fc_med_cc9;

	/* speed FC_SP_12: 12*100M = 1200 MB/s */

#define FC_SP_12 BIT_7

#define FC_SP_8  BIT_6

#define FC_SP_16 BIT_5

#define FC_SP_4  BIT_4

#define FC_SP_32 BIT_3

#define FC_SP_2  BIT_2

#define FC_SP_1  BIT_0

	u8 fc_sp_cc10;

	u8 encode;

	u8 bitrate;

	u8 rate_id;

	u8 length_km;		/* offset 14/eh */

	u8 length_100m;

	u8 length_50um_10m;

	u8 length_62um_10m;

	u8 length_om4_10m;

	u8 length_om3_10m;

#define SFF_VEN_NAME_LEN 16

	u8 vendor_name[SFF_VEN_NAME_LEN];	/* offset 20/14h */

	u8 tx_compat;

	u8 vendor_oui[3];

#define SFF_PART_NAME_LEN 16

	u8 vendor_pn[SFF_PART_NAME_LEN];	/* part number */

	u8 vendor_rev[4];

	u8 wavelength[2];

	u8 resv;

	u8 cc_base;

	u8 options[2];	/* offset 64 */

	u8 br_max;

	u8 br_min;

	u8 vendor_sn[16];

	u8 date_code[8];

	u8 diag;

	u8 enh_options;

	u8 sff_revision;

	u8 cc_ext;

	u8 vendor_specific[32];

	u8 resv2[128];

};



#define AUTO_DETECT_SFP_SUPPORT(_vha)\

	(ql2xautodetectsfp && !_vha->vp_idx &&		\

	(IS_QLA25XX(_vha->hw) || IS_QLA81XX(_vha->hw) ||\

	IS_QLA83XX(_vha->hw) || IS_QLA27XX(_vha->hw)))



#define USER_CTRL_IRQ(_ha) (ql2xuctrlirq && QLA_TGT_MODE_ENABLED() && \

	(IS_QLA27XX(_ha) || IS_QLA83XX(_ha)))

drivers/scsi/qla2xxx/qla_gbl.h

+3 −0
Original line number Diff line number Diff line
@@ -105,6 +105,7 @@ int qla24xx_async_notify_ack(scsi_qla_host_t *, fc_port_t *, 
int qla24xx_post_newsess_work(struct scsi_qla_host *, port_id_t *, u8 *,

    void *);

int qla24xx_fcport_handle_login(struct scsi_qla_host *, fc_port_t *);

int qla24xx_detect_sfp(scsi_qla_host_t *vha);



/*

 * Global Data in qla_os.c source file.
@@ -142,6 +143,7 @@ extern int ql2xfwholdabts; 
extern int ql2xmvasynctoatio;

extern int ql2xuctrlirq;

extern int ql2xnvmeenable;

extern int ql2xautodetectsfp;



extern int qla2x00_loop_reset(scsi_qla_host_t *);

extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);
@@ -796,6 +798,7 @@ extern char *qdev_state(uint32_t); 
extern void qla82xx_clear_pending_mbx(scsi_qla_host_t *);

extern int qla82xx_read_temperature(scsi_qla_host_t *);

extern int qla8044_read_temperature(scsi_qla_host_t *);

extern int qla2x00_read_sfp_dev(struct scsi_qla_host *, char *, int);



/* BSG related functions */

extern int qla24xx_bsg_request(struct bsg_job *);

drivers/scsi/qla2xxx/qla_init.c

+143 −0
Original line number Diff line number Diff line
@@ -2823,6 +2823,147 @@ qla2x00_alloc_outstanding_cmds(struct qla_hw_data *ha, struct req_que *req) 
	return QLA_SUCCESS;

}



#define PRINT_FIELD(_field, _flag, _str) {		\

	if (a0->_field & _flag) {\

		if (p) {\

			strcat(ptr, "|");\

			ptr++;\

			leftover--;\

		} \

		len = snprintf(ptr, leftover, "%s", _str);	\

		p = 1;\

		leftover -= len;\

		ptr += len; \

	} \

}



static void qla2xxx_print_sfp_info(struct scsi_qla_host *vha)

{

#define STR_LEN 64

	struct sff_8247_a0 *a0 = (struct sff_8247_a0 *)vha->hw->sfp_data;

	u8 str[STR_LEN], *ptr, p;

	int leftover, len;



	memset(str, 0, STR_LEN);

	snprintf(str, SFF_VEN_NAME_LEN+1, a0->vendor_name);

	ql_dbg(ql_dbg_init, vha, 0x015a,

	    "SFP MFG Name: %s\n", str);



	memset(str, 0, STR_LEN);

	snprintf(str, SFF_PART_NAME_LEN+1, a0->vendor_pn);

	ql_dbg(ql_dbg_init, vha, 0x015c,

	    "SFP Part Name: %s\n", str);



	/* media */

	memset(str, 0, STR_LEN);

	ptr = str;

	leftover = STR_LEN;

	p = len = 0;

	PRINT_FIELD(fc_med_cc9, FC_MED_TW, "Twin AX");

	PRINT_FIELD(fc_med_cc9, FC_MED_TP, "Twisted Pair");

	PRINT_FIELD(fc_med_cc9, FC_MED_MI, "Min Coax");

	PRINT_FIELD(fc_med_cc9, FC_MED_TV, "Video Coax");

	PRINT_FIELD(fc_med_cc9, FC_MED_M6, "MultiMode 62.5um");

	PRINT_FIELD(fc_med_cc9, FC_MED_M5, "MultiMode 50um");

	PRINT_FIELD(fc_med_cc9, FC_MED_SM, "SingleMode");

	ql_dbg(ql_dbg_init, vha, 0x0160,

	    "SFP Media: %s\n", str);



	/* link length */

	memset(str, 0, STR_LEN);

	ptr = str;

	leftover = STR_LEN;

	p = len = 0;

	PRINT_FIELD(fc_ll_cc7, FC_LL_VL, "Very Long");

	PRINT_FIELD(fc_ll_cc7, FC_LL_S, "Short");

	PRINT_FIELD(fc_ll_cc7, FC_LL_I, "Intermediate");

	PRINT_FIELD(fc_ll_cc7, FC_LL_L, "Long");

	PRINT_FIELD(fc_ll_cc7, FC_LL_M, "Medium");

	ql_dbg(ql_dbg_init, vha, 0x0196,

	    "SFP Link Length: %s\n", str);



	memset(str, 0, STR_LEN);

	ptr = str;

	leftover = STR_LEN;

	p = len = 0;

	PRINT_FIELD(fc_ll_cc7, FC_LL_SA, "Short Wave (SA)");

	PRINT_FIELD(fc_ll_cc7, FC_LL_LC, "Long Wave(LC)");

	PRINT_FIELD(fc_tec_cc8, FC_TEC_SN, "Short Wave (SN)");

	PRINT_FIELD(fc_tec_cc8, FC_TEC_SL, "Short Wave (SL)");

	PRINT_FIELD(fc_tec_cc8, FC_TEC_LL, "Long Wave (LL)");

	ql_dbg(ql_dbg_init, vha, 0x016e,

	    "SFP FC Link Tech: %s\n", str);



	if (a0->length_km)

		ql_dbg(ql_dbg_init, vha, 0x016f,

		    "SFP Distant: %d km\n", a0->length_km);

	if (a0->length_100m)

		ql_dbg(ql_dbg_init, vha, 0x0170,

		    "SFP Distant: %d m\n", a0->length_100m*100);

	if (a0->length_50um_10m)

		ql_dbg(ql_dbg_init, vha, 0x0189,

		    "SFP Distant (WL=50um): %d m\n", a0->length_50um_10m * 10);

	if (a0->length_62um_10m)

		ql_dbg(ql_dbg_init, vha, 0x018a,

		  "SFP Distant (WL=62.5um): %d m\n", a0->length_62um_10m * 10);

	if (a0->length_om4_10m)

		ql_dbg(ql_dbg_init, vha, 0x0194,

		    "SFP Distant (OM4): %d m\n", a0->length_om4_10m * 10);

	if (a0->length_om3_10m)

		ql_dbg(ql_dbg_init, vha, 0x0195,

		    "SFP Distant (OM3): %d m\n", a0->length_om3_10m * 10);

}





/*

 * Return Code:

 *   QLA_SUCCESS: no action

 *   QLA_INTERFACE_ERROR: SFP is not there.

 *   QLA_FUNCTION_FAILED: detected New SFP

 */

int

qla24xx_detect_sfp(scsi_qla_host_t *vha)

{

	int rc = QLA_SUCCESS;

	struct sff_8247_a0 *a;

	struct qla_hw_data *ha = vha->hw;



	if (!AUTO_DETECT_SFP_SUPPORT(vha))

		goto out;



	rc = qla2x00_read_sfp_dev(vha, NULL, 0);

	if (rc)

		goto out;



	a = (struct sff_8247_a0 *)vha->hw->sfp_data;

	qla2xxx_print_sfp_info(vha);



	if (a->fc_ll_cc7 & FC_LL_VL || a->fc_ll_cc7 & FC_LL_L) {

		/* long range */

		ha->flags.detected_lr_sfp = 1;



		if (a->length_km > 5 || a->length_100m > 50)

			ha->long_range_distance = LR_DISTANCE_10K;

		else

			ha->long_range_distance = LR_DISTANCE_5K;



		if (ha->flags.detected_lr_sfp != ha->flags.using_lr_setting)

			ql_dbg(ql_dbg_async, vha, 0x507b,

			    "Detected Long Range SFP.\n");

	} else {

		/* short range */

		ha->flags.detected_lr_sfp = 0;

		if (ha->flags.using_lr_setting)

			ql_dbg(ql_dbg_async, vha, 0x5084,

			    "Detected Short Range SFP.\n");

	}



	if (!vha->flags.init_done)

		rc = QLA_SUCCESS;

out:

	return rc;

}



/**

 * qla2x00_setup_chip() - Load and start RISC firmware.

 * @ha: HA context
@@ -2879,6 +3020,8 @@ qla2x00_setup_chip(scsi_qla_host_t *vha) 
			rval = qla2x00_execute_fw(vha, srisc_address);

			/* Retrieve firmware information. */

			if (rval == QLA_SUCCESS) {

				qla24xx_detect_sfp(vha);



				rval = qla2x00_set_exlogins_buffer(vha);

				if (rval != QLA_SUCCESS)

					goto failed;

drivers/scsi/qla2xxx/qla_isr.c

+5 −0
Original line number Diff line number Diff line
@@ -799,6 +799,11 @@ skip_rio: 


		vha->flags.management_server_logged_in = 0;

		qla2x00_post_aen_work(vha, FCH_EVT_LINKUP, ha->link_data_rate);



		if (AUTO_DETECT_SFP_SUPPORT(vha)) {

			set_bit(DETECT_SFP_CHANGE, &vha->dpc_flags);

			qla2xxx_wake_dpc(vha);

		}

		break;



	case MBA_LOOP_DOWN:		/* Loop Down Event */

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