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Commit 5162cf0c authored by Giridhar Malavali's avatar Giridhar Malavali Committed by James Bottomley
Browse files

[SCSI] qla2xxx: Consolidated IOCB processing routines.

parent 99b8212c
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+2 −1
Original line number Diff line number Diff line
@@ -14,7 +14,8 @@
 * | Module Init and Probe        |       0x0116       | 0xfa           |
 * | Mailbox commands             |       0x112b       |		|
 * | Device Discovery             |       0x2084       |		|
 * | Queue Command and IO tracing |       0x302f       | 0x3008         |
 * | Queue Command and IO tracing |       0x302f       | 0x3008,0x302d, |
 * |                              |                    | 0x302e         |
 * | DPC Thread                   |       0x401c       |		|
 * | Async Events                 |       0x5057       | 0x5052		|
 * | Timer Routines               |       0x6011       | 0x600e,0x600f  |
+1 −1
Original line number Diff line number Diff line
@@ -572,7 +572,7 @@ extern void qla2x00_set_model_info(scsi_qla_host_t *, uint8_t *,
    size_t, char *);
extern int qla82xx_mbx_intr_enable(scsi_qla_host_t *);
extern int qla82xx_mbx_intr_disable(scsi_qla_host_t *);
extern void qla82xx_start_iocbs(srb_t *);
extern void qla82xx_start_iocbs(scsi_qla_host_t *);
extern int qla82xx_fcoe_ctx_reset(scsi_qla_host_t *);
extern int qla82xx_check_md_needed(scsi_qla_host_t *);
extern void qla82xx_chip_reset_cleanup(scsi_qla_host_t *);
+517 −101
Original line number Diff line number Diff line
@@ -11,8 +11,6 @@

#include <scsi/scsi_tcq.h>

static void qla2x00_isp_cmd(struct scsi_qla_host *, struct req_que *);

static void qla25xx_set_que(srb_t *, struct rsp_que **);
/**
 * qla2x00_get_cmd_direction() - Determine control_flag data direction.
@@ -467,6 +465,42 @@ qla2x00_start_scsi(srb_t *sp)
	return (QLA_FUNCTION_FAILED);
}

/**
 * qla2x00_start_iocbs() - Execute the IOCB command
 */
static void
qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req)
{
	struct qla_hw_data *ha = vha->hw;
	device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
	struct device_reg_2xxx __iomem *ioreg = &ha->iobase->isp;

	if (IS_QLA82XX(ha)) {
		qla82xx_start_iocbs(vha);
	} else {
		/* Adjust ring index. */
		req->ring_index++;
		if (req->ring_index == req->length) {
			req->ring_index = 0;
			req->ring_ptr = req->ring;
		} else
			req->ring_ptr++;

		/* Set chip new ring index. */
		if (ha->mqenable) {
			WRT_REG_DWORD(&reg->isp25mq.req_q_in, req->ring_index);
			RD_REG_DWORD(&ioreg->hccr);
		} else if (IS_FWI2_CAPABLE(ha)) {
			WRT_REG_DWORD(&reg->isp24.req_q_in, req->ring_index);
			RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
		} else {
			WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp),
				req->ring_index);
			RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
		}
	}
}

/**
 * qla2x00_marker() - Send a marker IOCB to the firmware.
 * @ha: HA context
@@ -516,7 +550,7 @@ __qla2x00_marker(struct scsi_qla_host *vha, struct req_que *req,
	}
	wmb();

	qla2x00_isp_cmd(vha, req);
	qla2x00_start_iocbs(vha, req);

	return (QLA_SUCCESS);
}
@@ -537,89 +571,140 @@ qla2x00_marker(struct scsi_qla_host *vha, struct req_que *req,
}

/**
 * qla2x00_isp_cmd() - Modify the request ring pointer.
 * @ha: HA context
 * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
 * Continuation Type 1 IOCBs to allocate.
 *
 * @dsds: number of data segment decriptors needed
 *
 * Note: The caller must hold the hardware lock before calling this routine.
 * Returns the number of IOCB entries needed to store @dsds.
 */
static void
qla2x00_isp_cmd(struct scsi_qla_host *vha, struct req_que *req)
inline uint16_t
qla24xx_calc_iocbs(scsi_qla_host_t *vha, uint16_t dsds)
{
	struct qla_hw_data *ha = vha->hw;
	device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
	struct device_reg_2xxx __iomem *ioreg = &ha->iobase->isp;
	uint16_t iocbs;

	iocbs = 1;
	if (dsds > 1) {
		iocbs += (dsds - 1) / 5;
		if ((dsds - 1) % 5)
			iocbs++;
	}
	return iocbs;
}

	ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x302d,
	    "IOCB data:\n");
	ql_dump_buffer(ql_dbg_io + ql_dbg_buffer, vha, 0x302e,
	    (uint8_t *)req->ring_ptr, REQUEST_ENTRY_SIZE);
static inline int
qla24xx_build_scsi_type_6_iocbs(srb_t *sp, struct cmd_type_6 *cmd_pkt,
	uint16_t tot_dsds)
{
	uint32_t *cur_dsd = NULL;
	scsi_qla_host_t	*vha;
	struct qla_hw_data *ha;
	struct scsi_cmnd *cmd;
	struct	scatterlist *cur_seg;
	uint32_t *dsd_seg;
	void *next_dsd;
	uint8_t avail_dsds;
	uint8_t first_iocb = 1;
	uint32_t dsd_list_len;
	struct dsd_dma *dsd_ptr;
	struct ct6_dsd *ctx;

	/* Adjust ring index. */
	req->ring_index++;
	if (req->ring_index == req->length) {
		req->ring_index = 0;
		req->ring_ptr = req->ring;
	} else
		req->ring_ptr++;
	cmd = sp->cmd;

	/* Set chip new ring index. */
	if (IS_QLA82XX(ha)) {
		uint32_t dbval = 0x04 | (ha->portnum << 5);
	/* Update entry type to indicate Command Type 3 IOCB */
	*((uint32_t *)(&cmd_pkt->entry_type)) =
		__constant_cpu_to_le32(COMMAND_TYPE_6);

		/* write, read and verify logic */
		dbval = dbval | (req->id << 8) | (req->ring_index << 16);
		if (ql2xdbwr)
			qla82xx_wr_32(ha, ha->nxdb_wr_ptr, dbval);
		else {
			WRT_REG_DWORD(
				(unsigned long __iomem *)ha->nxdb_wr_ptr,
				dbval);
			wmb();
			while (RD_REG_DWORD(ha->nxdb_rd_ptr) != dbval) {
				WRT_REG_DWORD((unsigned long __iomem *)
					ha->nxdb_wr_ptr, dbval);
				wmb();
			}
	/* No data transfer */
	if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
		cmd_pkt->byte_count = __constant_cpu_to_le32(0);
		return 0;
	}
	} else if (ha->mqenable) {
		/* Set chip new ring index. */
		WRT_REG_DWORD(&reg->isp25mq.req_q_in, req->ring_index);
		RD_REG_DWORD(&ioreg->hccr);
	} else {
		if (IS_FWI2_CAPABLE(ha)) {
			WRT_REG_DWORD(&reg->isp24.req_q_in, req->ring_index);
			RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);

	vha = sp->fcport->vha;
	ha = vha->hw;

	/* Set transfer direction */
	if (cmd->sc_data_direction == DMA_TO_DEVICE) {
		cmd_pkt->control_flags =
		    __constant_cpu_to_le16(CF_WRITE_DATA);
		ha->qla_stats.output_bytes += scsi_bufflen(cmd);
	} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
		cmd_pkt->control_flags =
		    __constant_cpu_to_le16(CF_READ_DATA);
		ha->qla_stats.input_bytes += scsi_bufflen(cmd);
	}

	cur_seg = scsi_sglist(cmd);
	ctx = sp->ctx;

	while (tot_dsds) {
		avail_dsds = (tot_dsds > QLA_DSDS_PER_IOCB) ?
		    QLA_DSDS_PER_IOCB : tot_dsds;
		tot_dsds -= avail_dsds;
		dsd_list_len = (avail_dsds + 1) * QLA_DSD_SIZE;

		dsd_ptr = list_first_entry(&ha->gbl_dsd_list,
		    struct dsd_dma, list);
		next_dsd = dsd_ptr->dsd_addr;
		list_del(&dsd_ptr->list);
		ha->gbl_dsd_avail--;
		list_add_tail(&dsd_ptr->list, &ctx->dsd_list);
		ctx->dsd_use_cnt++;
		ha->gbl_dsd_inuse++;

		if (first_iocb) {
			first_iocb = 0;
			dsd_seg = (uint32_t *)&cmd_pkt->fcp_data_dseg_address;
			*dsd_seg++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
			*dsd_seg++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
			cmd_pkt->fcp_data_dseg_len = cpu_to_le32(dsd_list_len);
		} else {
			WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp),
				req->ring_index);
			RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
			*cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
			*cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
			*cur_dsd++ = cpu_to_le32(dsd_list_len);
		}
		cur_dsd = (uint32_t *)next_dsd;
		while (avail_dsds) {
			dma_addr_t	sle_dma;

			sle_dma = sg_dma_address(cur_seg);
			*cur_dsd++ = cpu_to_le32(LSD(sle_dma));
			*cur_dsd++ = cpu_to_le32(MSD(sle_dma));
			*cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));
			cur_seg = sg_next(cur_seg);
			avail_dsds--;
		}
	}

	/* Null termination */
	*cur_dsd++ =  0;
	*cur_dsd++ = 0;
	*cur_dsd++ = 0;
	cmd_pkt->control_flags |= CF_DATA_SEG_DESCR_ENABLE;
	return 0;
}

/**
 * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
 * Continuation Type 1 IOCBs to allocate.
/*
 * qla24xx_calc_dsd_lists() - Determine number of DSD list required
 * for Command Type 6.
 *
 * @dsds: number of data segment decriptors needed
 *
 * Returns the number of IOCB entries needed to store @dsds.
 * Returns the number of dsd list needed to store @dsds.
 */
inline uint16_t
qla24xx_calc_iocbs(scsi_qla_host_t *vha, uint16_t dsds)
qla24xx_calc_dsd_lists(uint16_t dsds)
{
	uint16_t iocbs;
	uint16_t dsd_lists = 0;

	iocbs = 1;
	if (dsds > 1) {
		iocbs += (dsds - 1) / 5;
		if ((dsds - 1) % 5)
			iocbs++;
	}
	return iocbs;
	dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
	if (dsds % QLA_DSDS_PER_IOCB)
		dsd_lists++;
	return dsd_lists;
}


/**
 * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
 * IOCB types.
@@ -946,6 +1031,7 @@ qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp,
	*cur_dsd++ = 0;
	return 0;
}

static int
qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp, uint32_t *dsd,
	uint16_t tot_dsds)
@@ -1793,42 +1879,6 @@ qla2x00_alloc_iocbs(scsi_qla_host_t *vha, srb_t *sp)
	return pkt;
}

static void
qla2x00_start_iocbs(srb_t *sp)
{
	struct qla_hw_data *ha = sp->fcport->vha->hw;
	struct req_que *req = ha->req_q_map[0];
	device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
	struct device_reg_2xxx __iomem *ioreg = &ha->iobase->isp;

	if (IS_QLA82XX(ha)) {
		qla82xx_start_iocbs(sp);
	} else {
		/* Adjust ring index. */
		req->ring_index++;
		if (req->ring_index == req->length) {
			req->ring_index = 0;
			req->ring_ptr = req->ring;
		} else
			req->ring_ptr++;

		/* Set chip new ring index. */
		if (ha->mqenable) {
			WRT_REG_DWORD(&reg->isp25mq.req_q_in, req->ring_index);
			RD_REG_DWORD(&ioreg->hccr);
		} else if (IS_QLA82XX(ha)) {
			qla82xx_start_iocbs(sp);
		} else if (IS_FWI2_CAPABLE(ha)) {
			WRT_REG_DWORD(&reg->isp24.req_q_in, req->ring_index);
			RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
		} else {
			WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp),
				req->ring_index);
			RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
		}
	}
}

static void
qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
{
@@ -2161,6 +2211,372 @@ qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
        ct_iocb->entry_count = entry_count;
}

/*
 * qla82xx_start_scsi() - Send a SCSI command to the ISP
 * @sp: command to send to the ISP
 *
 * Returns non-zero if a failure occurred, else zero.
 */
int
qla82xx_start_scsi(srb_t *sp)
{
	int		ret, nseg;
	unsigned long   flags;
	struct scsi_cmnd *cmd;
	uint32_t	*clr_ptr;
	uint32_t        index;
	uint32_t	handle;
	uint16_t	cnt;
	uint16_t	req_cnt;
	uint16_t	tot_dsds;
	struct device_reg_82xx __iomem *reg;
	uint32_t dbval;
	uint32_t *fcp_dl;
	uint8_t additional_cdb_len;
	struct ct6_dsd *ctx;
	struct scsi_qla_host *vha = sp->fcport->vha;
	struct qla_hw_data *ha = vha->hw;
	struct req_que *req = NULL;
	struct rsp_que *rsp = NULL;
	char		tag[2];

	/* Setup device pointers. */
	ret = 0;
	reg = &ha->iobase->isp82;
	cmd = sp->cmd;
	req = vha->req;
	rsp = ha->rsp_q_map[0];

	/* So we know we haven't pci_map'ed anything yet */
	tot_dsds = 0;

	dbval = 0x04 | (ha->portnum << 5);

	/* Send marker if required */
	if (vha->marker_needed != 0) {
		if (qla2x00_marker(vha, req,
			rsp, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
			ql_log(ql_log_warn, vha, 0x300c,
			    "qla2x00_marker failed for cmd=%p.\n", cmd);
			return QLA_FUNCTION_FAILED;
		}
		vha->marker_needed = 0;
	}

	/* Acquire ring specific lock */
	spin_lock_irqsave(&ha->hardware_lock, flags);

	/* Check for room in outstanding command list. */
	handle = req->current_outstanding_cmd;
	for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
		handle++;
		if (handle == MAX_OUTSTANDING_COMMANDS)
			handle = 1;
		if (!req->outstanding_cmds[handle])
			break;
	}
	if (index == MAX_OUTSTANDING_COMMANDS)
		goto queuing_error;

	/* Map the sg table so we have an accurate count of sg entries needed */
	if (scsi_sg_count(cmd)) {
		nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
		    scsi_sg_count(cmd), cmd->sc_data_direction);
		if (unlikely(!nseg))
			goto queuing_error;
	} else
		nseg = 0;

	tot_dsds = nseg;

	if (tot_dsds > ql2xshiftctondsd) {
		struct cmd_type_6 *cmd_pkt;
		uint16_t more_dsd_lists = 0;
		struct dsd_dma *dsd_ptr;
		uint16_t i;

		more_dsd_lists = qla24xx_calc_dsd_lists(tot_dsds);
		if ((more_dsd_lists + ha->gbl_dsd_inuse) >= NUM_DSD_CHAIN) {
			ql_dbg(ql_dbg_io, vha, 0x300d,
			    "Num of DSD list %d is than %d for cmd=%p.\n",
			    more_dsd_lists + ha->gbl_dsd_inuse, NUM_DSD_CHAIN,
			    cmd);
			goto queuing_error;
		}

		if (more_dsd_lists <= ha->gbl_dsd_avail)
			goto sufficient_dsds;
		else
			more_dsd_lists -= ha->gbl_dsd_avail;

		for (i = 0; i < more_dsd_lists; i++) {
			dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
			if (!dsd_ptr) {
				ql_log(ql_log_fatal, vha, 0x300e,
				    "Failed to allocate memory for dsd_dma "
				    "for cmd=%p.\n", cmd);
				goto queuing_error;
			}

			dsd_ptr->dsd_addr = dma_pool_alloc(ha->dl_dma_pool,
				GFP_ATOMIC, &dsd_ptr->dsd_list_dma);
			if (!dsd_ptr->dsd_addr) {
				kfree(dsd_ptr);
				ql_log(ql_log_fatal, vha, 0x300f,
				    "Failed to allocate memory for dsd_addr "
				    "for cmd=%p.\n", cmd);
				goto queuing_error;
			}
			list_add_tail(&dsd_ptr->list, &ha->gbl_dsd_list);
			ha->gbl_dsd_avail++;
		}

sufficient_dsds:
		req_cnt = 1;

		if (req->cnt < (req_cnt + 2)) {
			cnt = (uint16_t)RD_REG_DWORD_RELAXED(
				&reg->req_q_out[0]);
			if (req->ring_index < cnt)
				req->cnt = cnt - req->ring_index;
			else
				req->cnt = req->length -
					(req->ring_index - cnt);
		}

		if (req->cnt < (req_cnt + 2))
			goto queuing_error;

		ctx = sp->ctx = mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
		if (!sp->ctx) {
			ql_log(ql_log_fatal, vha, 0x3010,
			    "Failed to allocate ctx for cmd=%p.\n", cmd);
			goto queuing_error;
		}
		memset(ctx, 0, sizeof(struct ct6_dsd));
		ctx->fcp_cmnd = dma_pool_alloc(ha->fcp_cmnd_dma_pool,
			GFP_ATOMIC, &ctx->fcp_cmnd_dma);
		if (!ctx->fcp_cmnd) {
			ql_log(ql_log_fatal, vha, 0x3011,
			    "Failed to allocate fcp_cmnd for cmd=%p.\n", cmd);
			goto queuing_error_fcp_cmnd;
		}

		/* Initialize the DSD list and dma handle */
		INIT_LIST_HEAD(&ctx->dsd_list);
		ctx->dsd_use_cnt = 0;

		if (cmd->cmd_len > 16) {
			additional_cdb_len = cmd->cmd_len - 16;
			if ((cmd->cmd_len % 4) != 0) {
				/* SCSI command bigger than 16 bytes must be
				 * multiple of 4
				 */
				ql_log(ql_log_warn, vha, 0x3012,
				    "scsi cmd len %d not multiple of 4 "
				    "for cmd=%p.\n", cmd->cmd_len, cmd);
				goto queuing_error_fcp_cmnd;
			}
			ctx->fcp_cmnd_len = 12 + cmd->cmd_len + 4;
		} else {
			additional_cdb_len = 0;
			ctx->fcp_cmnd_len = 12 + 16 + 4;
		}

		cmd_pkt = (struct cmd_type_6 *)req->ring_ptr;
		cmd_pkt->handle = MAKE_HANDLE(req->id, handle);

		/* Zero out remaining portion of packet. */
		/*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
		clr_ptr = (uint32_t *)cmd_pkt + 2;
		memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
		cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);

		/* Set NPORT-ID and LUN number*/
		cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
		cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
		cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
		cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
		cmd_pkt->vp_index = sp->fcport->vp_idx;

		/* Build IOCB segments */
		if (qla24xx_build_scsi_type_6_iocbs(sp, cmd_pkt, tot_dsds))
			goto queuing_error_fcp_cmnd;

		int_to_scsilun(sp->cmd->device->lun, &cmd_pkt->lun);
		host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));

		/* build FCP_CMND IU */
		memset(ctx->fcp_cmnd, 0, sizeof(struct fcp_cmnd));
		int_to_scsilun(sp->cmd->device->lun, &ctx->fcp_cmnd->lun);
		ctx->fcp_cmnd->additional_cdb_len = additional_cdb_len;

		if (cmd->sc_data_direction == DMA_TO_DEVICE)
			ctx->fcp_cmnd->additional_cdb_len |= 1;
		else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
			ctx->fcp_cmnd->additional_cdb_len |= 2;

		/*
		 * Update tagged queuing modifier -- default is TSK_SIMPLE (0).
		 */
		if (scsi_populate_tag_msg(cmd, tag)) {
			switch (tag[0]) {
			case HEAD_OF_QUEUE_TAG:
				ctx->fcp_cmnd->task_attribute =
				    TSK_HEAD_OF_QUEUE;
				break;
			case ORDERED_QUEUE_TAG:
				ctx->fcp_cmnd->task_attribute =
				    TSK_ORDERED;
				break;
			}
		}

		memcpy(ctx->fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);

		fcp_dl = (uint32_t *)(ctx->fcp_cmnd->cdb + 16 +
		    additional_cdb_len);
		*fcp_dl = htonl((uint32_t)scsi_bufflen(cmd));

		cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(ctx->fcp_cmnd_len);
		cmd_pkt->fcp_cmnd_dseg_address[0] =
		    cpu_to_le32(LSD(ctx->fcp_cmnd_dma));
		cmd_pkt->fcp_cmnd_dseg_address[1] =
		    cpu_to_le32(MSD(ctx->fcp_cmnd_dma));

		sp->flags |= SRB_FCP_CMND_DMA_VALID;
		cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
		/* Set total data segment count. */
		cmd_pkt->entry_count = (uint8_t)req_cnt;
		/* Specify response queue number where
		 * completion should happen
		 */
		cmd_pkt->entry_status = (uint8_t) rsp->id;
	} else {
		struct cmd_type_7 *cmd_pkt;
		req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
		if (req->cnt < (req_cnt + 2)) {
			cnt = (uint16_t)RD_REG_DWORD_RELAXED(
			    &reg->req_q_out[0]);
			if (req->ring_index < cnt)
				req->cnt = cnt - req->ring_index;
			else
				req->cnt = req->length -
					(req->ring_index - cnt);
		}
		if (req->cnt < (req_cnt + 2))
			goto queuing_error;

		cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
		cmd_pkt->handle = MAKE_HANDLE(req->id, handle);

		/* Zero out remaining portion of packet. */
		/* tagged queuing modifier -- default is TSK_SIMPLE (0).*/
		clr_ptr = (uint32_t *)cmd_pkt + 2;
		memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
		cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);

		/* Set NPORT-ID and LUN number*/
		cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
		cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
		cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
		cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
		cmd_pkt->vp_index = sp->fcport->vp_idx;

		int_to_scsilun(sp->cmd->device->lun, &cmd_pkt->lun);
		host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
			sizeof(cmd_pkt->lun));

		/*
		 * Update tagged queuing modifier -- default is TSK_SIMPLE (0).
		 */
		if (scsi_populate_tag_msg(cmd, tag)) {
			switch (tag[0]) {
			case HEAD_OF_QUEUE_TAG:
				cmd_pkt->task = TSK_HEAD_OF_QUEUE;
				break;
			case ORDERED_QUEUE_TAG:
				cmd_pkt->task = TSK_ORDERED;
				break;
			}
		}

		/* Load SCSI command packet. */
		memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
		host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));

		cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));

		/* Build IOCB segments */
		qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds);

		/* Set total data segment count. */
		cmd_pkt->entry_count = (uint8_t)req_cnt;
		/* Specify response queue number where
		 * completion should happen.
		 */
		cmd_pkt->entry_status = (uint8_t) rsp->id;

	}
	/* Build command packet. */
	req->current_outstanding_cmd = handle;
	req->outstanding_cmds[handle] = sp;
	sp->handle = handle;
	sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle;
	req->cnt -= req_cnt;
	wmb();

	/* Adjust ring index. */
	req->ring_index++;
	if (req->ring_index == req->length) {
		req->ring_index = 0;
		req->ring_ptr = req->ring;
	} else
		req->ring_ptr++;

	sp->flags |= SRB_DMA_VALID;

	/* Set chip new ring index. */
	/* write, read and verify logic */
	dbval = dbval | (req->id << 8) | (req->ring_index << 16);
	if (ql2xdbwr)
		qla82xx_wr_32(ha, ha->nxdb_wr_ptr, dbval);
	else {
		WRT_REG_DWORD(
			(unsigned long __iomem *)ha->nxdb_wr_ptr,
			dbval);
		wmb();
		while (RD_REG_DWORD(ha->nxdb_rd_ptr) != dbval) {
			WRT_REG_DWORD(
				(unsigned long __iomem *)ha->nxdb_wr_ptr,
				dbval);
			wmb();
		}
	}

	/* Manage unprocessed RIO/ZIO commands in response queue. */
	if (vha->flags.process_response_queue &&
	    rsp->ring_ptr->signature != RESPONSE_PROCESSED)
		qla24xx_process_response_queue(vha, rsp);

	spin_unlock_irqrestore(&ha->hardware_lock, flags);
	return QLA_SUCCESS;

queuing_error_fcp_cmnd:
	dma_pool_free(ha->fcp_cmnd_dma_pool, ctx->fcp_cmnd, ctx->fcp_cmnd_dma);
queuing_error:
	if (tot_dsds)
		scsi_dma_unmap(cmd);

	if (sp->ctx) {
		mempool_free(sp->ctx, ha->ctx_mempool);
		sp->ctx = NULL;
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return QLA_FUNCTION_FAILED;
}

int
qla2x00_start_sp(srb_t *sp)
{
@@ -2213,7 +2629,7 @@ qla2x00_start_sp(srb_t *sp)
	}

	wmb();
	qla2x00_start_iocbs(sp);
	qla2x00_start_iocbs(sp->fcport->vha, ha->req_q_map[0]);
done:
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
	return rval;
+2 −480

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