path: root/drivers/scsi/qla2xxx/qla_gs.c

/*
 *                  QLOGIC LINUX SOFTWARE
 *
 * QLogic ISP2x00 device driver for Linux 2.6.x
 * Copyright (C) 2003-2004 QLogic Corporation
 * (www.qlogic.com)
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 */
#include "qla_def.h"

static inline struct ct_sns_req *
qla2x00_prep_ct_req(struct ct_sns_req *, uint16_t, uint16_t);

static inline struct sns_cmd_pkt *
qla2x00_prep_sns_cmd(scsi_qla_host_t *, uint16_t, uint16_t, uint16_t);

static int qla2x00_sns_ga_nxt(scsi_qla_host_t *, fc_port_t *);
static int qla2x00_sns_gid_pt(scsi_qla_host_t *, sw_info_t *);
static int qla2x00_sns_gpn_id(scsi_qla_host_t *, sw_info_t *);
static int qla2x00_sns_gnn_id(scsi_qla_host_t *, sw_info_t *);
static int qla2x00_sns_rft_id(scsi_qla_host_t *);
static int qla2x00_sns_rnn_id(scsi_qla_host_t *);

/**
 * qla2x00_prep_ms_iocb() - Prepare common MS IOCB fields for SNS CT query.
 * @ha: HA context
 * @req_size: request size in bytes
 * @rsp_size: response size in bytes
 *
 * Returns a pointer to the @ha's ms_iocb.
 */
ms_iocb_entry_t *
qla2x00_prep_ms_iocb(scsi_qla_host_t *ha, uint32_t req_size, uint32_t rsp_size)
{
	ms_iocb_entry_t *ms_pkt;

	ms_pkt = ha->ms_iocb;
	memset(ms_pkt, 0, sizeof(ms_iocb_entry_t));

	ms_pkt->entry_type = MS_IOCB_TYPE;
	ms_pkt->entry_count = 1;
	SET_TARGET_ID(ha, ms_pkt->loop_id, SIMPLE_NAME_SERVER);
	ms_pkt->control_flags = __constant_cpu_to_le16(CF_READ | CF_HEAD_TAG);
	ms_pkt->timeout = __constant_cpu_to_le16(25);
	ms_pkt->cmd_dsd_count = __constant_cpu_to_le16(1);
	ms_pkt->total_dsd_count = __constant_cpu_to_le16(2);
	ms_pkt->rsp_bytecount = cpu_to_le32(rsp_size);
	ms_pkt->req_bytecount = cpu_to_le32(req_size);

	ms_pkt->dseg_req_address[0] = cpu_to_le32(LSD(ha->ct_sns_dma));
	ms_pkt->dseg_req_address[1] = cpu_to_le32(MSD(ha->ct_sns_dma));
	ms_pkt->dseg_req_length = ms_pkt->req_bytecount;

	ms_pkt->dseg_rsp_address[0] = cpu_to_le32(LSD(ha->ct_sns_dma));
	ms_pkt->dseg_rsp_address[1] = cpu_to_le32(MSD(ha->ct_sns_dma));
	ms_pkt->dseg_rsp_length = ms_pkt->rsp_bytecount;

	return (ms_pkt);
}

/**
 * qla2x00_prep_ct_req() - Prepare common CT request fields for SNS query.
 * @ct_req: CT request buffer
 * @cmd: GS command
 * @rsp_size: response size in bytes
 *
 * Returns a pointer to the intitialized @ct_req.
 */
static inline struct ct_sns_req *
qla2x00_prep_ct_req(struct ct_sns_req *ct_req, uint16_t cmd, uint16_t rsp_size)
{
	memset(ct_req, 0, sizeof(struct ct_sns_pkt));

	ct_req->header.revision = 0x01;
	ct_req->header.gs_type = 0xFC;
	ct_req->header.gs_subtype = 0x02;
	ct_req->command = cpu_to_be16(cmd);
	ct_req->max_rsp_size = cpu_to_be16((rsp_size - 16) / 4);

	return (ct_req);
}


/**
 * qla2x00_ga_nxt() - SNS scan for fabric devices via GA_NXT command.
 * @ha: HA context
 * @fcport: fcport entry to updated
 *
 * Returns 0 on success.
 */
int
qla2x00_ga_nxt(scsi_qla_host_t *ha, fc_port_t *fcport)
{
	int		rval;

	ms_iocb_entry_t	*ms_pkt;
	struct ct_sns_req	*ct_req;
	struct ct_sns_rsp	*ct_rsp;

	if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
		return (qla2x00_sns_ga_nxt(ha, fcport));
	}

	/* Issue GA_NXT */
	/* Prepare common MS IOCB */
	ms_pkt = qla2x00_prep_ms_iocb(ha, GA_NXT_REQ_SIZE, GA_NXT_RSP_SIZE);

	/* Prepare CT request */
	ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, GA_NXT_CMD,
	    GA_NXT_RSP_SIZE);
	ct_rsp = &ha->ct_sns->p.rsp;

	/* Prepare CT arguments -- port_id */
	ct_req->req.port_id.port_id[0] = fcport->d_id.b.domain;
	ct_req->req.port_id.port_id[1] = fcport->d_id.b.area;
	ct_req->req.port_id.port_id[2] = fcport->d_id.b<