qla_iocb.c 69.5 KB
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/*
 * QLogic Fibre Channel HBA Driver
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 * Copyright (c)  2003-2011 QLogic Corporation
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 *
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 * See LICENSE.qla2xxx for copyright and licensing details.
 */
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#include "qla_def.h"

#include <linux/blkdev.h>
#include <linux/delay.h>

#include <scsi/scsi_tcq.h>

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static void qla25xx_set_que(srb_t *, struct rsp_que **);
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/**
 * qla2x00_get_cmd_direction() - Determine control_flag data direction.
 * @cmd: SCSI command
 *
 * Returns the proper CF_* direction based on CDB.
 */
static inline uint16_t
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qla2x00_get_cmd_direction(srb_t *sp)
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{
	uint16_t cflags;
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	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
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	cflags = 0;

	/* Set transfer direction */
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	if (cmd->sc_data_direction == DMA_TO_DEVICE) {
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		cflags = CF_WRITE;
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		sp->fcport->vha->hw->qla_stats.output_bytes +=
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		    scsi_bufflen(cmd);
	} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
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		cflags = CF_READ;
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		sp->fcport->vha->hw->qla_stats.input_bytes +=
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		    scsi_bufflen(cmd);
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	}
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	return (cflags);
}

/**
 * qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and
 * Continuation Type 0 IOCBs to allocate.
 *
 * @dsds: number of data segment decriptors needed
 *
 * Returns the number of IOCB entries needed to store @dsds.
 */
uint16_t
qla2x00_calc_iocbs_32(uint16_t dsds)
{
	uint16_t iocbs;

	iocbs = 1;
	if (dsds > 3) {
		iocbs += (dsds - 3) / 7;
		if ((dsds - 3) % 7)
			iocbs++;
	}
	return (iocbs);
}

/**
 * qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and
 * Continuation Type 1 IOCBs to allocate.
 *
 * @dsds: number of data segment decriptors needed
 *
 * Returns the number of IOCB entries needed to store @dsds.
 */
uint16_t
qla2x00_calc_iocbs_64(uint16_t dsds)
{
	uint16_t iocbs;

	iocbs = 1;
	if (dsds > 2) {
		iocbs += (dsds - 2) / 5;
		if ((dsds - 2) % 5)
			iocbs++;
	}
	return (iocbs);
}

/**
 * qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB.
 * @ha: HA context
 *
 * Returns a pointer to the Continuation Type 0 IOCB packet.
 */
static inline cont_entry_t *
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qla2x00_prep_cont_type0_iocb(struct scsi_qla_host *vha)
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{
	cont_entry_t *cont_pkt;
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	struct req_que *req = vha->req;
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	/* Adjust ring index. */
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	req->ring_index++;
	if (req->ring_index == req->length) {
		req->ring_index = 0;
		req->ring_ptr = req->ring;
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	} else {
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		req->ring_ptr++;
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	}

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	cont_pkt = (cont_entry_t *)req->ring_ptr;
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	/* Load packet defaults. */
	*((uint32_t *)(&cont_pkt->entry_type)) =
	    __constant_cpu_to_le32(CONTINUE_TYPE);

	return (cont_pkt);
}

/**
 * qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB.
 * @ha: HA context
 *
 * Returns a pointer to the continuation type 1 IOCB packet.
 */
static inline cont_a64_entry_t *
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qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *vha, struct req_que *req)
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{
	cont_a64_entry_t *cont_pkt;

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

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	cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
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	/* Load packet defaults. */
	*((uint32_t *)(&cont_pkt->entry_type)) =
	    __constant_cpu_to_le32(CONTINUE_A64_TYPE);

	return (cont_pkt);
}

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static inline int
qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
{
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	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
	uint8_t	guard = scsi_host_get_guard(cmd->device->host);
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	/* We only support T10 DIF right now */
	if (guard != SHOST_DIX_GUARD_CRC) {
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		ql_dbg(ql_dbg_io, sp->fcport->vha, 0x3007,
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		    "Unsupported guard: %d for cmd=%p.\n", guard, cmd);
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		return 0;
	}

	/* We always use DIFF Bundling for best performance */
	*fw_prot_opts = 0;

	/* Translate SCSI opcode to a protection opcode */
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	switch (scsi_get_prot_op(cmd)) {
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	case SCSI_PROT_READ_STRIP:
		*fw_prot_opts |= PO_MODE_DIF_REMOVE;
		break;
	case SCSI_PROT_WRITE_INSERT:
		*fw_prot_opts |= PO_MODE_DIF_INSERT;
		break;
	case SCSI_PROT_READ_INSERT:
		*fw_prot_opts |= PO_MODE_DIF_INSERT;
		break;
	case SCSI_PROT_WRITE_STRIP:
		*fw_prot_opts |= PO_MODE_DIF_REMOVE;
		break;
	case SCSI_PROT_READ_PASS:
		*fw_prot_opts |= PO_MODE_DIF_PASS;
		break;
	case SCSI_PROT_WRITE_PASS:
		*fw_prot_opts |= PO_MODE_DIF_PASS;
		break;
	default:	/* Normal Request */
		*fw_prot_opts |= PO_MODE_DIF_PASS;
		break;
	}

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	return scsi_prot_sg_count(cmd);
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}

/*
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 * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit
 * capable IOCB types.
 *
 * @sp: SRB command to process
 * @cmd_pkt: Command type 2 IOCB
 * @tot_dsds: Total number of segments to transfer
 */
void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt,
    uint16_t tot_dsds)
{
	uint16_t	avail_dsds;
	uint32_t	*cur_dsd;
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	scsi_qla_host_t	*vha;
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	struct scsi_cmnd *cmd;
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	struct scatterlist *sg;
	int i;
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	cmd = GET_CMD_SP(sp);
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	/* Update entry type to indicate Command Type 2 IOCB */
	*((uint32_t *)(&cmd_pkt->entry_type)) =
	    __constant_cpu_to_le32(COMMAND_TYPE);

	/* No data transfer */
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	if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
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		cmd_pkt->byte_count = __constant_cpu_to_le32(0);
		return;
	}

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	vha = sp->fcport->vha;
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	cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
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	/* Three DSDs are available in the Command Type 2 IOCB */
	avail_dsds = 3;
	cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;

	/* Load data segments */
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	scsi_for_each_sg(cmd, sg, tot_dsds, i) {
		cont_entry_t *cont_pkt;

		/* Allocate additional continuation packets? */
		if (avail_dsds == 0) {
			/*
			 * Seven DSDs are available in the Continuation
			 * Type 0 IOCB.
			 */
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			cont_pkt = qla2x00_prep_cont_type0_iocb(vha);
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			cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address;
			avail_dsds = 7;
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		}
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		*cur_dsd++ = cpu_to_le32(sg_dma_address(sg));
		*cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
		avail_dsds--;
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	}
}

/**
 * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit
 * capable IOCB types.
 *
 * @sp: SRB command to process
 * @cmd_pkt: Command type 3 IOCB
 * @tot_dsds: Total number of segments to transfer
 */
void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt,
    uint16_t tot_dsds)
{
	uint16_t	avail_dsds;
	uint32_t	*cur_dsd;
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	scsi_qla_host_t	*vha;
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	struct scsi_cmnd *cmd;
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	struct scatterlist *sg;
	int i;
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	cmd = GET_CMD_SP(sp);
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	/* Update entry type to indicate Command Type 3 IOCB */
	*((uint32_t *)(&cmd_pkt->entry_type)) =
	    __constant_cpu_to_le32(COMMAND_A64_TYPE);

	/* No data transfer */
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	if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
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		cmd_pkt->byte_count = __constant_cpu_to_le32(0);
		return;
	}

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	vha = sp->fcport->vha;
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	cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
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	/* Two DSDs are available in the Command Type 3 IOCB */
	avail_dsds = 2;
	cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;

	/* Load data segments */
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	scsi_for_each_sg(cmd, sg, tot_dsds, i) {
		dma_addr_t	sle_dma;
		cont_a64_entry_t *cont_pkt;

		/* Allocate additional continuation packets? */
		if (avail_dsds == 0) {
			/*
			 * Five DSDs are available in the Continuation
			 * Type 1 IOCB.
			 */
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			cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
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			cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
			avail_dsds = 5;
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		}
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		sle_dma = sg_dma_address(sg);
		*cur_dsd++ = cpu_to_le32(LSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(MSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
		avail_dsds--;
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	}
}

/**
 * qla2x00_start_scsi() - Send a SCSI command to the ISP
 * @sp: command to send to the ISP
 *
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 * Returns non-zero if a failure occurred, else zero.
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 */
int
qla2x00_start_scsi(srb_t *sp)
{
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	int		ret, nseg;
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	unsigned long   flags;
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	scsi_qla_host_t	*vha;
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	struct scsi_cmnd *cmd;
	uint32_t	*clr_ptr;
	uint32_t        index;
	uint32_t	handle;
	cmd_entry_t	*cmd_pkt;
	uint16_t	cnt;
	uint16_t	req_cnt;
	uint16_t	tot_dsds;
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	struct device_reg_2xxx __iomem *reg;
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	struct qla_hw_data *ha;
	struct req_que *req;
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	struct rsp_que *rsp;
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	char		tag[2];
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	/* Setup device pointers. */
	ret = 0;
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	vha = sp->fcport->vha;
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	ha = vha->hw;
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	reg = &ha->iobase->isp;
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	cmd = GET_CMD_SP(sp);
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	req = ha->req_q_map[0];
	rsp = ha->rsp_q_map[0];
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	/* So we know we haven't pci_map'ed anything yet */
	tot_dsds = 0;
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	/* Send marker if required */
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	if (vha->marker_needed != 0) {
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		if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
		    QLA_SUCCESS) {
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			return (QLA_FUNCTION_FAILED);
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		}
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		vha->marker_needed = 0;
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	}

	/* Acquire ring specific lock */
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	spin_lock_irqsave(&ha->hardware_lock, flags);
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	/* Check for room in outstanding command list. */
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	handle = req->current_outstanding_cmd;
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	for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
		handle++;
		if (handle == MAX_OUTSTANDING_COMMANDS)
			handle = 1;
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		if (!req->outstanding_cmds[handle])
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			break;
	}
	if (index == MAX_OUTSTANDING_COMMANDS)
		goto queuing_error;

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	/* Map the sg table so we have an accurate count of sg entries needed */
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	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;

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	tot_dsds = nseg;
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	/* Calculate the number of request entries needed. */
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	req_cnt = ha->isp_ops->calc_req_entries(tot_dsds);
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	if (req->cnt < (req_cnt + 2)) {
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		cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg));
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		if (req->ring_index < cnt)
			req->cnt = cnt - req->ring_index;
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		else
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			req->cnt = req->length -
			    (req->ring_index - cnt);
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	}
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	if (req->cnt < (req_cnt + 2))
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		goto queuing_error;

	/* Build command packet */
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	req->current_outstanding_cmd = handle;
	req->outstanding_cmds[handle] = sp;
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	sp->handle = handle;
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	cmd->host_scribble = (unsigned char *)(unsigned long)handle;
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	req->cnt -= req_cnt;
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	cmd_pkt = (cmd_entry_t *)req->ring_ptr;
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	cmd_pkt->handle = handle;
	/* Zero out remaining portion of packet. */
	clr_ptr = (uint32_t *)cmd_pkt + 2;
	memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
	cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);

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	/* Set target ID and LUN number*/
	SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id);
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	cmd_pkt->lun = cpu_to_le16(cmd->device->lun);
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	/* Update tagged queuing modifier */
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	if (scsi_populate_tag_msg(cmd, tag)) {
		switch (tag[0]) {
		case HEAD_OF_QUEUE_TAG:
			cmd_pkt->control_flags =
			    __constant_cpu_to_le16(CF_HEAD_TAG);
			break;
		case ORDERED_QUEUE_TAG:
			cmd_pkt->control_flags =
			    __constant_cpu_to_le16(CF_ORDERED_TAG);
			break;
		default:
			cmd_pkt->control_flags =
			    __constant_cpu_to_le16(CF_SIMPLE_TAG);
			break;
		}
	}
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	/* Load SCSI command packet. */
	memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
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	cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
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	/* Build IOCB segments */
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	ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds);
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	/* Set total data segment count. */
	cmd_pkt->entry_count = (uint8_t)req_cnt;
	wmb();

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

	/* Set chip new ring index. */
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	WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), req->ring_index);
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	RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg));	/* PCI Posting. */

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	/* Manage unprocessed RIO/ZIO commands in response queue. */
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	if (vha->flags.process_response_queue &&
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	    rsp->ring_ptr->signature != RESPONSE_PROCESSED)
		qla2x00_process_response_queue(rsp);
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	spin_unlock_irqrestore(&ha->hardware_lock, flags);
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	return (QLA_SUCCESS);

queuing_error:
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	if (tot_dsds)
		scsi_dma_unmap(cmd);

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

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/**
 * 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);

	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. */
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		if (ha->mqenable || IS_QLA83XX(ha)) {
			WRT_REG_DWORD(req->req_q_in, req->ring_index);
			RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
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		} 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));
		}
	}
}

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/**
 * qla2x00_marker() - Send a marker IOCB to the firmware.
 * @ha: HA context
 * @loop_id: loop ID
 * @lun: LUN
 * @type: marker modifier
 *
 * Can be called from both normal and interrupt context.
 *
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 * Returns non-zero if a failure occurred, else zero.
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 */
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static int
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__qla2x00_marker(struct scsi_qla_host *vha, struct req_que *req,
			struct rsp_que *rsp, uint16_t loop_id,
			uint16_t lun, uint8_t type)
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{
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	mrk_entry_t *mrk;
	struct mrk_entry_24xx *mrk24;
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	struct qla_hw_data *ha = vha->hw;
	scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
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	mrk24 = NULL;
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	req = ha->req_q_map[0];
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	mrk = (mrk_entry_t *)qla2x00_alloc_iocbs(vha, 0);
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	if (mrk == NULL) {
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		ql_log(ql_log_warn, base_vha, 0x3026,
		    "Failed to allocate Marker IOCB.\n");
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		return (QLA_FUNCTION_FAILED);
	}

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	mrk->entry_type = MARKER_TYPE;
	mrk->modifier = type;
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	if (type != MK_SYNC_ALL) {
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		if (IS_FWI2_CAPABLE(ha)) {
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			mrk24 = (struct mrk_entry_24xx *) mrk;
			mrk24->nport_handle = cpu_to_le16(loop_id);
			mrk24->lun[1] = LSB(lun);
			mrk24->lun[2] = MSB(lun);
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			host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
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			mrk24->vp_index = vha->vp_idx;
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			mrk24->handle = MAKE_HANDLE(req->id, mrk24->handle);
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		} else {
			SET_TARGET_ID(ha, mrk->target, loop_id);
			mrk->lun = cpu_to_le16(lun);
		}
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	}
	wmb();

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	qla2x00_start_iocbs(vha, req);
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	return (QLA_SUCCESS);
}

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int
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qla2x00_marker(struct scsi_qla_host *vha, struct req_que *req,
		struct rsp_que *rsp, uint16_t loop_id, uint16_t lun,
		uint8_t type)
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{
	int ret;
	unsigned long flags = 0;

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	spin_lock_irqsave(&vha->hw->hardware_lock, flags);
	ret = __qla2x00_marker(vha, req, rsp, loop_id, lun, type);
	spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
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	return (ret);
}

/**
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 * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
 * Continuation Type 1 IOCBs to allocate.
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 *
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 * @dsds: number of data segment decriptors needed
 *
 * Returns the number of IOCB entries needed to store @dsds.
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 */
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inline uint16_t
qla24xx_calc_iocbs(scsi_qla_host_t *vha, uint16_t dsds)
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{
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	uint16_t iocbs;
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	iocbs = 1;
	if (dsds > 1) {
		iocbs += (dsds - 1) / 5;
		if ((dsds - 1) % 5)
			iocbs++;
	}
	return iocbs;
}
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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;
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	cmd = GET_CMD_SP(sp);
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	/* Update entry type to indicate Command Type 3 IOCB */
	*((uint32_t *)(&cmd_pkt->entry_type)) =
		__constant_cpu_to_le32(COMMAND_TYPE_6);

	/* No data transfer */
	if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
		cmd_pkt->byte_count = __constant_cpu_to_le32(0);
		return 0;
	}

	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);
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	ctx = GET_CMD_CTX_SP(sp);
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	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);
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		} else {
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			*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--;
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		}
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	}

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

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/*
 * qla24xx_calc_dsd_lists() - Determine number of DSD list required
 * for Command Type 6.
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 *
 * @dsds: number of data segment decriptors needed
 *
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 * Returns the number of dsd list needed to store @dsds.
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 */
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inline uint16_t
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qla24xx_calc_dsd_lists(uint16_t dsds)
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{
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	uint16_t dsd_lists = 0;
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	dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
	if (dsds % QLA_DSDS_PER_IOCB)
		dsd_lists++;
	return dsd_lists;
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}

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/**
 * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
 * IOCB types.
 *
 * @sp: SRB command to process
 * @cmd_pkt: Command type 3 IOCB
 * @tot_dsds: Total number of segments to transfer
 */
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inline void
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qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
    uint16_t tot_dsds)
{
	uint16_t	avail_dsds;
	uint32_t	*cur_dsd;
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	scsi_qla_host_t	*vha;
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	struct scsi_cmnd *cmd;
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	struct scatterlist *sg;
	int i;
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	struct req_que *req;
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	cmd = GET_CMD_SP(sp);
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	/* Update entry type to indicate Command Type 3 IOCB */
	*((uint32_t *)(&cmd_pkt->entry_type)) =
	    __constant_cpu_to_le32(COMMAND_TYPE_7);

	/* No data transfer */
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	if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
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		cmd_pkt->byte_count = __constant_cpu_to_le32(0);
		return;
	}

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	vha = sp->fcport->vha;
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	req = vha->req;
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	/* Set transfer direction */
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	if (cmd->sc_data_direction == DMA_TO_DEVICE) {
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		cmd_pkt->task_mgmt_flags =
		    __constant_cpu_to_le16(TMF_WRITE_DATA);
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		sp->fcport->vha->hw->qla_stats.output_bytes +=
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		    scsi_bufflen(cmd);
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	} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
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		cmd_pkt->task_mgmt_flags =
		    __constant_cpu_to_le16(TMF_READ_DATA);
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		sp->fcport->vha->hw->qla_stats.input_bytes +=
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		    scsi_bufflen(cmd);
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	}
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	/* One DSD is available in the Command Type 3 IOCB */
	avail_dsds = 1;
	cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;

	/* Load data segments */
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	scsi_for_each_sg(cmd, sg, tot_dsds, i) {
		dma_addr_t	sle_dma;
		cont_a64_entry_t *cont_pkt;

		/* Allocate additional continuation packets? */
		if (avail_dsds == 0) {
			/*
			 * Five DSDs are available in the Continuation
			 * Type 1 IOCB.
			 */
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			cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
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			cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
			avail_dsds = 5;
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		}
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		sle_dma = sg_dma_address(sg);
		*cur_dsd++ = cpu_to_le32(LSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(MSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
		avail_dsds--;
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	}
}

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struct fw_dif_context {
	uint32_t ref_tag;
	uint16_t app_tag;
	uint8_t ref_tag_mask[4];	/* Validation/Replacement Mask*/
	uint8_t app_tag_mask[2];	/* Validation/Replacement Mask*/
};

/*
 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
 *
 */
static inline void
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qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
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    unsigned int protcnt)
{
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	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
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	scsi_qla_host_t *vha = shost_priv(cmd->device->host);
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	switch (scsi_get_prot_type(cmd)) {
	case SCSI_PROT_DIF_TYPE0:
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		/*
		 * No check for ql2xenablehba_err_chk, as it would be an
		 * I/O error if hba tag generation is not done.
		 */
		pkt->ref_tag = cpu_to_le32((uint32_t)
		    (0xffffffff & scsi_get_lba(cmd)));
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		if (!qla2x00_hba_err_chk_enabled(sp))
			break;

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		pkt->ref_tag_mask[0] = 0xff;
		pkt->ref_tag_mask[1] = 0xff;
		pkt->ref_tag_mask[2] = 0xff;
		pkt->ref_tag_mask[3] = 0xff;
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		break;

	/*
	 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
	 * match LBA in CDB + N
	 */
	case SCSI_PROT_DIF_TYPE2:
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		pkt->app_tag = __constant_cpu_to_le16(0);
		pkt->app_tag_mask[0] = 0x0;
		pkt->app_tag_mask[1] = 0x0;
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		pkt->ref_tag = cpu_to_le32((uint32_t)
		    (0xffffffff & scsi_get_lba(cmd)));

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		if (!qla2x00_hba_err_chk_enabled(sp))
			break;

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		/* enable ALL bytes of the ref tag */
		pkt->ref_tag_mask[0] = 0xff;
		pkt->ref_tag_mask[1] = 0xff;
		pkt->ref_tag_mask[2] = 0xff;
		pkt->ref_tag_mask[3] = 0xff;
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		break;

	/* For Type 3 protection: 16 bit GUARD only */
	case SCSI_PROT_DIF_TYPE3:
		pkt->ref_tag_mask[0] = pkt->ref_tag_mask[1] =
			pkt->ref_tag_mask[2] = pkt->ref_tag_mask[3] =
								0x00;
		break;

	/*
	 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
	 * 16 bit app tag.
	 */
	case SCSI_PROT_DIF_TYPE1:
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		pkt->ref_tag = cpu_to_le32((uint32_t)
		    (0xffffffff & scsi_get_lba(cmd)));
		pkt->app_tag = __constant_cpu_to_le16(0);
		pkt->app_tag_mask[0] = 0x0;
		pkt->app_tag_mask[1] = 0x0;

		if (!qla2x00_hba_err_chk_enabled(sp))
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			break;

		/* enable ALL bytes of the ref tag */
		pkt->ref_tag_mask[0] = 0xff;
		pkt->ref_tag_mask[1] = 0xff;
		pkt->ref_tag_mask[2] = 0xff;
		pkt->ref_tag_mask[3] = 0xff;
		break;
	}

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	ql_dbg(ql_dbg_io, vha, 0x3009,
	    "Setting protection Tags: (BIG) ref tag = 0x%x, app tag = 0x%x, "
	    "prot SG count %d, cmd lba 0x%x, prot_type=%u cmd=%p.\n",
	    pkt->ref_tag, pkt->app_tag, protcnt, (int)scsi_get_lba(cmd),
	    scsi_get_prot_type(cmd), cmd);
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}

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struct qla2_sgx {
	dma_addr_t		dma_addr;	/* OUT */
	uint32_t		dma_len;	/* OUT */

	uint32_t		tot_bytes;	/* IN */
	struct scatterlist	*cur_sg;	/* IN */

	/* for book keeping, bzero on initial invocation */
	uint32_t		bytes_consumed;
	uint32_t		num_bytes;
	uint32_t		tot_partial;

	/* for debugging */
	uint32_t		num_sg;
	srb_t			*sp;
};

static int
qla24xx_get_one_block_sg(uint32_t blk_sz, struct qla2_sgx *sgx,
	uint32_t *partial)
{
	struct scatterlist *sg;
	uint32_t cumulative_partial, sg_len;
	dma_addr_t sg_dma_addr;

	if (sgx->num_bytes == sgx->tot_bytes)
		return 0;

	sg = sgx->cur_sg;
	cumulative_partial = sgx->tot_partial;

	sg_dma_addr = sg_dma_address(sg);
	sg_len = sg_dma_len(sg);

	sgx->dma_addr = sg_dma_addr + sgx->bytes_consumed;

	if ((cumulative_partial + (sg_len - sgx->bytes_consumed)) >= blk_sz) {
		sgx->dma_len = (blk_sz - cumulative_partial);
		sgx->tot_partial = 0;
		sgx->num_bytes += blk_sz;
		*partial = 0;
	} else {
		sgx->dma_len = sg_len - sgx->bytes_consumed;
		sgx->tot_partial += sgx->dma_len;
		*partial = 1;
	}

	sgx->bytes_consumed += sgx->dma_len;

	if (sg_len == sgx->bytes_consumed) {
		sg = sg_next(sg);
		sgx->num_sg++;
		sgx->cur_sg = sg;
		sgx->bytes_consumed = 0;
	}

	return 1;
}

static int
qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp,
	uint32_t *dsd, uint16_t tot_dsds)
{
	void *next_dsd;
	uint8_t avail_dsds = 0;
	uint32_t dsd_list_len;
	struct dsd_dma *dsd_ptr;
	struct scatterlist *sg_prot;
	uint32_t *cur_dsd = dsd;
	uint16_t	used_dsds = tot_dsds;

	uint32_t	prot_int;
	uint32_t	partial;
	struct qla2_sgx sgx;
	dma_addr_t	sle_dma;
	uint32_t	sle_dma_len, tot_prot_dma_len = 0;
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	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
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	prot_int = cmd->device->sector_size;

	memset(&sgx, 0, sizeof(struct qla2_sgx));
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	sgx.tot_bytes = scsi_bufflen(cmd);
	sgx.cur_sg = scsi_sglist(cmd);
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	sgx.sp = sp;

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	sg_prot = scsi_prot_sglist(cmd);
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	while (qla24xx_get_one_block_sg(prot_int, &sgx, &partial)) {

		sle_dma = sgx.dma_addr;
		sle_dma_len = sgx.dma_len;
alloc_and_fill:
		/* Allocate additional continuation packets? */
		if (avail_dsds == 0) {
			avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
					QLA_DSDS_PER_IOCB : used_dsds;
			dsd_list_len = (avail_dsds + 1) * 12;
			used_dsds -= avail_dsds;

			/* allocate tracking DS */
			dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
			if (!dsd_ptr)
				return 1;

			/* allocate new list */
			dsd_ptr->dsd_addr = next_dsd =
			    dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
				&dsd_ptr->dsd_list_dma);

			if (!next_dsd) {
				/*
				 * Need to cleanup only this dsd_ptr, rest
				 * will be done by sp_free_dma()
				 */
				kfree(dsd_ptr);
				return 1;
			}

			list_add_tail(&dsd_ptr->list,
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			    &((struct crc_context *)sp->u.scmd.ctx)->dsd_list);
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			sp->flags |= SRB_CRC_CTX_DSD_VALID;

			/* add new list to cmd iocb or last list */
			*cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
			*cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
			*cur_dsd++ = dsd_list_len;
			cur_dsd = (uint32_t *)next_dsd;
		}
		*cur_dsd++ = cpu_to_le32(LSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(MSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(sle_dma_len);
		avail_dsds--;

		if (partial == 0) {
			/* Got a full protection interval */
			sle_dma = sg_dma_address(sg_prot) + tot_prot_dma_len;
			sle_dma_len = 8;
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			tot_prot_dma_len += sle_dma_len;
			if (tot_prot_dma_len == sg_dma_len(sg_prot)) {
				tot_prot_dma_len = 0;
				sg_prot = sg_next(sg_prot);
			}

			partial = 1; /* So as to not re-enter this block */
			goto alloc_and_fill;
		}
	}
	/* Null termination */
	*cur_dsd++ = 0;
	*cur_dsd++ = 0;
	*cur_dsd++ = 0;
	return 0;
}
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static int
qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp, uint32_t *dsd,
	uint16_t tot_dsds)
{
	void *next_dsd;
	uint8_t avail_dsds = 0;
	uint32_t dsd_list_len;
	struct dsd_dma *dsd_ptr;
	struct scatterlist *sg;
	uint32_t *cur_dsd = dsd;
	int	i;
	uint16_t	used_dsds = tot_dsds;
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	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
	scsi_qla_host_t *vha = shost_priv(cmd->device->host);
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	uint8_t		*cp;

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	scsi_for_each_sg(cmd, sg, tot_dsds, i) {
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		dma_addr_t	sle_dma;

		/* Allocate additional continuation packets? */
		if (avail_dsds == 0) {
			avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
					QLA_DSDS_PER_IOCB : used_dsds;
			dsd_list_len = (avail_dsds + 1) * 12;
			used_dsds -= avail_dsds;

			/* allocate tracking DS */
			dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
			if (!dsd_ptr)
				return 1;

			/* allocate new list */
			dsd_ptr->dsd_addr = next_dsd =
			    dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
				&dsd_ptr->dsd_list_dma);

			if (!next_dsd) {
				/*
				 * Need to cleanup only this dsd_ptr, rest
				 * will be done by sp_free_dma()
				 */
				kfree(dsd_ptr);
				return 1;
			}

			list_add_tail(&dsd_ptr->list,
1083
			    &((struct crc_context *)sp->u.scmd.ctx)->dsd_list);
1084 1085 1086 1087 1088 1089 1090 1091 1092 1093

			sp->flags |= SRB_CRC_CTX_DSD_VALID;

			/* add new list to cmd iocb or last list */
			*cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
			*cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
			*cur_dsd++ = dsd_list_len;
			cur_dsd = (uint32_t *)next_dsd;
		}
		sle_dma = sg_dma_address(sg);
1094 1095
		ql_dbg(ql_dbg_io, vha, 0x300a,
		    "sg entry %d - addr=0x%x 0x%x, " "len=%d for cmd=%p.\n",
1096
		    i, LSD(sle_dma), MSD(sle_dma), sg_dma_len(sg), cmd);
1097 1098 1099 1100 1101
		*cur_dsd++ = cpu_to_le32(LSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(MSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
		avail_dsds--;

1102
		if (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_PASS) {
1103
			cp = page_address(sg_page(sg)) + sg->offset;
1104
			ql_dbg(ql_dbg_io, vha, 0x300b,
1105
			    "User data buffer=%p for cmd=%p.\n", cp, cmd);
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128
		}
	}
	/* Null termination */
	*cur_dsd++ = 0;
	*cur_dsd++ = 0;
	*cur_dsd++ = 0;
	return 0;
}

static int
qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp,
							uint32_t *dsd,
	uint16_t tot_dsds)
{
	void *next_dsd;
	uint8_t avail_dsds = 0;
	uint32_t dsd_list_len;
	struct dsd_dma *dsd_ptr;
	struct scatterlist *sg;
	int	i;
	struct scsi_cmnd *cmd;
	uint32_t *cur_dsd = dsd;
	uint16_t	used_dsds = tot_dsds;
1129
	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1130 1131
	uint8_t		*cp;

1132
	cmd = GET_CMD_SP(sp);
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162
	scsi_for_each_prot_sg(cmd, sg, tot_dsds, i) {
		dma_addr_t	sle_dma;

		/* Allocate additional continuation packets? */
		if (avail_dsds == 0) {
			avail_dsds = (used_dsds > QLA_DSDS_PER_IOCB) ?
						QLA_DSDS_PER_IOCB : used_dsds;
			dsd_list_len = (avail_dsds + 1) * 12;
			used_dsds -= avail_dsds;

			/* allocate tracking DS */
			dsd_ptr = kzalloc(sizeof(struct dsd_dma), GFP_ATOMIC);
			if (!dsd_ptr)
				return 1;

			/* allocate new list */
			dsd_ptr->dsd_addr = next_dsd =
			    dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC,
				&dsd_ptr->dsd_list_dma);

			if (!next_dsd) {
				/*
				 * Need to cleanup only this dsd_ptr, rest
				 * will be done by sp_free_dma()
				 */
				kfree(dsd_ptr);
				return 1;
			}

			list_add_tail(&dsd_ptr->list,
1163
			    &((struct crc_context *)sp->u.scmd.ctx)->dsd_list);
1164 1165 1166 1167 1168 1169 1170 1171 1172 1173

			sp->flags |= SRB_CRC_CTX_DSD_VALID;

			/* add new list to cmd iocb or last list */
			*cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
			*cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
			*cur_dsd++ = dsd_list_len;
			cur_dsd = (uint32_t *)next_dsd;
		}
		sle_dma = sg_dma_address(sg);
1174
		if (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_PASS) {
1175 1176 1177 1178 1179
			ql_dbg(ql_dbg_io, vha, 0x3027,
			    "%s(): %p, sg_entry %d - "
			    "addr=0x%x0x%x, len=%d.\n",
			    __func__, cur_dsd, i,
			    LSD(sle_dma), MSD(sle_dma), sg_dma_len(sg));
1180 1181 1182 1183 1184
		}
		*cur_dsd++ = cpu_to_le32(LSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(MSD(sle_dma));
		*cur_dsd++ = cpu_to_le32(sg_dma_len(sg));

1185
		if (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_PASS) {
1186
			cp = page_address(sg_page(sg)) + sg->offset;
1187 1188 1189
			ql_dbg(ql_dbg_io, vha, 0x3028,
			    "%s(): Protection Data buffer = %p.\n", __func__,
			    cp);
1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216
		}
		avail_dsds--;
	}
	/* Null termination */
	*cur_dsd++ = 0;
	*cur_dsd++ = 0;
	*cur_dsd++ = 0;
	return 0;
}

/**
 * qla24xx_build_scsi_crc_2_iocbs() - Build IOCB command utilizing Command
 *							Type 6 IOCB types.
 *
 * @sp: SRB command to process
 * @cmd_pkt: Command type 3 IOCB
 * @tot_dsds: Total number of segments to transfer
 */
static inline int
qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
    uint16_t tot_dsds, uint16_t tot_prot_dsds, uint16_t fw_prot_opts)
{
	uint32_t		*cur_dsd, *fcp_dl;
	scsi_qla_host_t		*vha;
	struct scsi_cmnd	*cmd;
	struct scatterlist	*cur_seg;
	int			sgc;
1217
	uint32_t		total_bytes = 0;
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228
	uint32_t		data_bytes;
	uint32_t		dif_bytes;
	uint8_t			bundling = 1;
	uint16_t		blk_size;
	uint8_t			*clr_ptr;
	struct crc_context	*crc_ctx_pkt = NULL;
	struct qla_hw_data	*ha;
	uint8_t			additional_fcpcdb_len;
	uint16_t		fcp_cmnd_len;
	struct fcp_cmnd		*fcp_cmnd;
	dma_addr_t		crc_ctx_dma;
1229
	char			tag[2];
1230

1231
	cmd = GET_CMD_SP(sp);
1232 1233 1234 1235 1236 1237

	sgc = 0;
	/* Update entry type to indicate Command Type CRC_2 IOCB */
	*((uint32_t *)(&cmd_pkt->entry_type)) =
	    __constant_cpu_to_le32(COMMAND_TYPE_CRC_2);

1238 1239 1240
	vha = sp->fcport->vha;
	ha = vha->hw;

1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258
	/* No data transfer */
	data_bytes = scsi_bufflen(cmd);
	if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
		cmd_pkt->byte_count = __constant_cpu_to_le32(0);
		return QLA_SUCCESS;
	}

	cmd_pkt->vp_index = sp->fcport->vp_idx;

	/* Set transfer direction */
	if (cmd->sc_data_direction == DMA_TO_DEVICE) {
		cmd_pkt->control_flags =
		    __constant_cpu_to_le16(CF_WRITE_DATA);
	} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
		cmd_pkt->control_flags =
		    __constant_cpu_to_le16(CF_READ_DATA);
	}

1259 1260 1261 1262
	if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
	    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP) ||
	    (scsi_get_prot_op(cmd) == SCSI_PROT_READ_STRIP) ||
	    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_INSERT))
1263 1264 1265
		bundling = 0;

	/* Allocate CRC context from global pool */
1266 1267
	crc_ctx_pkt = sp->u.scmd.ctx =
	    dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284

	if (!crc_ctx_pkt)
		goto crc_queuing_error;

	/* Zero out CTX area. */
	clr_ptr = (uint8_t *)crc_ctx_pkt;
	memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));

	crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;

	sp->flags |= SRB_CRC_CTX_DMA_VALID;

	/* Set handle */
	crc_ctx_pkt->handle = cmd_pkt->handle;

	INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);

1285
	qla24xx_set_t10dif_tags(sp, (struct fw_dif_context *)
1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312
	    &crc_ctx_pkt->ref_tag, tot_prot_dsds);

	cmd_pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
	cmd_pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
	cmd_pkt->crc_context_len = CRC_CONTEXT_LEN_FW;

	/* Determine SCSI command length -- align to 4 byte boundary */
	if (cmd->cmd_len > 16) {
		additional_fcpcdb_len = cmd->cmd_len - 16;
		if ((cmd->cmd_len % 4) != 0) {
			/* SCSI cmd > 16 bytes must be multiple of 4 */
			goto crc_queuing_error;
		}
		fcp_cmnd_len = 12 + cmd->cmd_len + 4;
	} else {
		additional_fcpcdb_len = 0;
		fcp_cmnd_len = 12 + 16 + 4;
	}

	fcp_cmnd = &crc_ctx_pkt->fcp_cmnd;

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

1313
	int_to_scsilun(cmd->device->lun, &fcp_cmnd->lun);
1314 1315 1316 1317 1318 1319
	memcpy(fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
	cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(fcp_cmnd_len);
	cmd_pkt->fcp_cmnd_dseg_address[0] = cpu_to_le32(
	    LSD(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF));
	cmd_pkt->fcp_cmnd_dseg_address[1] = cpu_to_le32(
	    MSD(crc_ctx_dma + CRC_CONTEXT_FCPCMND_OFF));
1320
	fcp_cmnd->task_management = 0;
1321

1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340
	/*
	 * Update tagged queuing modifier if using command tag queuing
	 */
	if (scsi_populate_tag_msg(cmd, tag)) {
		switch (tag[0]) {
		case HEAD_OF_QUEUE_TAG:
		    fcp_cmnd->task_attribute = TSK_HEAD_OF_QUEUE;
		    break;
		case ORDERED_QUEUE_TAG:
		    fcp_cmnd->task_attribute = TSK_ORDERED;
		    break;
		default:
		    fcp_cmnd->task_attribute = 0;
		    break;
		}
	} else {
		fcp_cmnd->task_attribute = 0;
	}

1341 1342 1343 1344 1345
	cmd_pkt->fcp_rsp_dseg_len = 0; /* Let response come in status iocb */

	/* Compute dif len and adjust data len to incude protection */
	dif_bytes = 0;
	blk_size = cmd->device->sector_size;
1346 1347
	dif_bytes = (data_bytes / blk_size) * 8;

1348
	switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362
	case SCSI_PROT_READ_INSERT:
	case SCSI_PROT_WRITE_STRIP:
	    total_bytes = data_bytes;
	    data_bytes += dif_bytes;
	    break;

	case SCSI_PROT_READ_STRIP:
	case SCSI_PROT_WRITE_INSERT:
	case SCSI_PROT_READ_PASS:
	case SCSI_PROT_WRITE_PASS:
	    total_bytes = data_bytes + dif_bytes;
	    break;
	default:
	    BUG();
1363 1364
	}

1365
	if (!qla2x00_hba_err_chk_enabled(sp))
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392
		fw_prot_opts |= 0x10; /* Disable Guard tag checking */

	if (!bundling) {
		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
	} else {
		/*
		 * Configure Bundling if we need to fetch interlaving
		 * protection PCI accesses
		 */
		fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
		crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
		crc_ctx_pkt->u.bundling.dseg_count = cpu_to_le16(tot_dsds -
							tot_prot_dsds);
		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
	}

	/* Finish the common fields of CRC pkt */
	crc_ctx_pkt->blk_size = cpu_to_le16(blk_size);
	crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts);
	crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
	crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
	/* Fibre channel byte count */
	cmd_pkt->byte_count = cpu_to_le32(total_bytes);
	fcp_dl = (uint32_t *)(crc_ctx_pkt->fcp_cmnd.cdb + 16 +
	    additional_fcpcdb_len);
	*fcp_dl = htonl(total_bytes);

1393 1394 1395 1396
	if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
		cmd_pkt->byte_count = __constant_cpu_to_le32(0);
		return QLA_SUCCESS;
	}
1397 1398 1399 1400
	/* Walks data segments */

	cmd_pkt->control_flags |=
	    __constant_cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
1401 1402 1403 1404 1405 1406

	if (!bundling && tot_prot_dsds) {
		if (qla24xx_walk_and_build_sglist_no_difb(ha, sp,
		    cur_dsd, tot_dsds))
			goto crc_queuing_error;
	} else if (qla24xx_walk_and_build_sglist(ha, sp, cur_dsd,
1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426
	    (tot_dsds - tot_prot_dsds)))
		goto crc_queuing_error;

	if (bundling && tot_prot_dsds) {
		/* Walks dif segments */
		cur_seg = scsi_prot_sglist(cmd);
		cmd_pkt->control_flags |=
			__constant_cpu_to_le16(CF_DIF_SEG_DESCR_ENABLE);
		cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
		if (qla24xx_walk_and_build_prot_sglist(ha, sp, cur_dsd,
		    tot_prot_dsds))
			goto crc_queuing_error;
	}
	return QLA_SUCCESS;

crc_queuing_error:
	/* Cleanup will be performed by the caller */

	return QLA_FUNCTION_FAILED;
}
1427 1428 1429 1430 1431

/**
 * qla24xx_start_scsi() - Send a SCSI command to the ISP
 * @sp: command to send to the ISP
 *
1432
 * Returns non-zero if a failure occurred, else zero.
1433 1434 1435 1436
 */
int
qla24xx_start_scsi(srb_t *sp)
{
1437
	int		ret, nseg;
1438 1439 1440 1441 1442 1443 1444 1445
	unsigned long   flags;
	uint32_t	*clr_ptr;
	uint32_t        index;
	uint32_t	handle;
	struct cmd_type_7 *cmd_pkt;
	uint16_t	cnt;
	uint16_t	req_cnt;
	uint16_t	tot_dsds;
1446 1447
	struct req_que *req = NULL;
	struct rsp_que *rsp = NULL;
1448
	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1449
	struct scsi_qla_host *vha = sp->fcport->vha;
1450
	struct qla_hw_data *ha = vha->hw;
1451
	char		tag[2];
1452 1453 1454

	/* Setup device pointers. */
	ret = 0;
1455

1456 1457
	qla25xx_set_que(sp, &rsp);
	req = vha->req;
1458

1459 1460 1461 1462
	/* So we know we haven't pci_map'ed anything yet */
	tot_dsds = 0;

	/* Send marker if required */
1463
	if (vha->marker_needed != 0) {
1464 1465
		if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
		    QLA_SUCCESS)
1466
			return QLA_FUNCTION_FAILED;
1467
		vha->marker_needed = 0;
1468 1469 1470
	}

	/* Acquire ring specific lock */
1471
	spin_lock_irqsave(&ha->hardware_lock, flags);
1472 1473

	/* Check for room in outstanding command list. */
1474
	handle = req->current_outstanding_cmd;
1475 1476 1477 1478
	for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
		handle++;
		if (handle == MAX_OUTSTANDING_COMMANDS)
			handle = 1;
1479
		if (!req->outstanding_cmds[handle])
1480 1481
			break;
	}
1482
	if (index == MAX_OUTSTANDING_COMMANDS) {
1483
		goto queuing_error;
1484
	}
1485 1486

	/* Map the sg table so we have an accurate count of sg entries needed */
1487 1488 1489 1490
	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))
1491
			goto queuing_error;
1492 1493 1494
	} else
		nseg = 0;

1495
	tot_dsds = nseg;
1496
	req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1497
	if (req->cnt < (req_cnt + 2)) {
1498
		cnt = RD_REG_DWORD_RELAXED(req->req_q_out);
1499

1500 1501
		if (req->ring_index < cnt)
			req->cnt = cnt - req->ring_index;
1502
		else
1503 1504
			req->cnt = req->length -
				(req->ring_index - cnt);
1505
	}
1506
	if (req->cnt < (req_cnt + 2))
1507 1508 1509
		goto queuing_error;

	/* Build command packet. */
1510 1511
	req->current_outstanding_cmd = handle;
	req->outstanding_cmds[handle] = sp;
1512
	sp->handle = handle;
1513
	cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1514
	req->cnt -= req_cnt;
1515

1516
	cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1517
	cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
1518 1519

	/* Zero out remaining portion of packet. */
1520
	/*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1521 1522 1523 1524 1525 1526 1527 1528 1529
	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;
1530
	cmd_pkt->vp_index = sp->fcport->vp_idx;
1531

1532
	int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1533
	host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1534

1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546
	/* 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;
		}
	}

1547 1548 1549 1550
	/* 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));

1551
	cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
1552 1553 1554 1555 1556 1557

	/* 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;
1558 1559
	/* Specify response queue number where completion should happen */
	cmd_pkt->entry_status = (uint8_t) rsp->id;
1560 1561
	wmb();
	/* Adjust ring index. */
1562 1563 1564 1565
	req->ring_index++;
	if (req->ring_index == req->length) {
		req->ring_index = 0;
		req->ring_ptr = req->ring;
1566
	} else
1567
		req->ring_ptr++;
1568 1569 1570 1571

	sp->flags |= SRB_DMA_VALID;

	/* Set chip new ring index. */
1572 1573
	WRT_REG_DWORD(req->req_q_in, req->ring_index);
	RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);
1574

1575
	/* Manage unprocessed RIO/ZIO commands in response queue. */
1576
	if (vha->flags.process_response_queue &&
1577
		rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1578
		qla24xx_process_response_queue(vha, rsp);
1579

1580
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
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	return QLA_SUCCESS;

queuing_error:
1584 1585 1586
	if (tot_dsds)
		scsi_dma_unmap(cmd);

1587
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
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	return QLA_FUNCTION_FAILED;
Linus Torvalds's avatar
Linus Torvalds committed
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}
1591

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/**
 * qla24xx_dif_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
qla24xx_dif_start_scsi(srb_t *sp)
{
	int			nseg;
	unsigned long		flags;
	uint32_t		*clr_ptr;
	uint32_t		index;
	uint32_t		handle;
	uint16_t		cnt;
	uint16_t		req_cnt = 0;
	uint16_t		tot_dsds;
	uint16_t		tot_prot_dsds;
	uint16_t		fw_prot_opts = 0;
	struct req_que		*req = NULL;
	struct rsp_que		*rsp = NULL;
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	struct scsi_cmnd	*cmd = GET_CMD_SP(sp);
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	struct scsi_qla_host	*vha = sp->fcport->vha;
	struct qla_hw_data	*ha = vha->hw;
	struct cmd_type_crc_2	*cmd_pkt;
	uint32_t		status = 0;

#define QDSS_GOT_Q_SPACE	BIT_0

1622 1623 1624 1625 1626
	/* Only process protection or >16 cdb in this routine */
	if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
		if (cmd->cmd_len <= 16)
			return qla24xx_start_scsi(sp);
	}
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	/* Setup device pointers. */

	qla25xx_set_que(sp, &rsp);
	req = vha->req;

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

	/* Send marker if required */
	if (vha->marker_needed != 0) {
		if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
		    QLA_SUCCESS)
			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;

	/* Compute number of required data segments */
	/* 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
			sp->flags |= SRB_DMA_VALID;
1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684

		if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
		    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
			struct qla2_sgx sgx;
			uint32_t	partial;

			memset(&sgx, 0, sizeof(struct qla2_sgx));
			sgx.tot_bytes = scsi_bufflen(cmd);
			sgx.cur_sg = scsi_sglist(cmd);
			sgx.sp = sp;

			nseg = 0;
			while (qla24xx_get_one_block_sg(
			    cmd->device->sector_size, &sgx, &partial))
				nseg++;
		}
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	} else
		nseg = 0;

	/* number of required data segments */
	tot_dsds = nseg;

	/* Compute number of required protection segments */
	if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
		nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
		    scsi_prot_sg_count(cmd), cmd->sc_data_direction);
		if (unlikely(!nseg))
			goto queuing_error;
		else
			sp->flags |= SRB_CRC_PROT_DMA_VALID;
1699 1700 1701 1702 1703

		if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
		    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
			nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
		}
1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729
	} else {
		nseg = 0;
	}

	req_cnt = 1;
	/* Total Data and protection sg segment(s) */
	tot_prot_dsds = nseg;
	tot_dsds += nseg;
	if (req->cnt < (req_cnt + 2)) {
		cnt = RD_REG_DWORD_RELAXED(req->req_q_out);

		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;

	status |= QDSS_GOT_Q_SPACE;

	/* Build header part of command packet (excluding the OPCODE). */
	req->current_outstanding_cmd = handle;
	req->outstanding_cmds[handle] = sp;
1730
	sp->handle = handle;
1731
	cmd->host_scribble = (unsigned char *)(unsigned long)handle;
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	req->cnt -= req_cnt;

	/* Fill-in common area */
	cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
	cmd_pkt->handle = MAKE_HANDLE(req->id, handle);

	clr_ptr = (uint32_t *)cmd_pkt + 2;
	memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);

	/* 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;

1747
	int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
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	host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));

	/* Total Data and protection segment(s) */
	cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);

	/* Build IOCB segments and adjust for data protection segments */
	if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
	    req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
		QLA_SUCCESS)
		goto queuing_error;

	cmd_pkt->entry_count = (uint8_t)req_cnt;
	/* Specify response queue number where completion should happen */
	cmd_pkt->entry_status = (uint8_t) rsp->id;
	cmd_pkt->timeout = __constant_cpu_to_le16(0);
	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++;

	/* Set chip new ring index. */
	WRT_REG_DWORD(req->req_q_in, req->ring_index);
	RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);

	/* 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:
	if (status & QDSS_GOT_Q_SPACE) {
		req->outstanding_cmds[handle] = NULL;
		req->cnt += req_cnt;
	}
	/* Cleanup will be performed by the caller (queuecommand) */

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


1798
static void qla25xx_set_que(srb_t *sp, struct rsp_que **rsp)
1799
{
1800
	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1801 1802 1803
	struct qla_hw_data *ha = sp->fcport->vha->hw;
	int affinity = cmd->request->cpu;

1804
	if (ha->flags.cpu_affinity_enabled && affinity >= 0 &&
1805
		affinity < ha->max_rsp_queues - 1)
1806
		*rsp = ha->rsp_q_map[affinity + 1];
1807
	 else
1808 1809
		*rsp = ha->rsp_q_map[0];
}
1810 1811

/* Generic Control-SRB manipulation functions. */
1812 1813
void *
qla2x00_alloc_iocbs(scsi_qla_host_t *vha, srb_t *sp)
1814 1815 1816 1817 1818 1819 1820 1821 1822 1823
{
	struct qla_hw_data *ha = vha->hw;
	struct req_que *req = ha->req_q_map[0];
	device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
	uint32_t index, handle;
	request_t *pkt;
	uint16_t cnt, req_cnt;

	pkt = NULL;
	req_cnt = 1;
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	handle = 0;

	if (!sp)
		goto skip_cmd_array;
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	/* 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;
	}
1838 1839 1840
	if (index == MAX_OUTSTANDING_COMMANDS) {
		ql_log(ql_log_warn, vha, 0x700b,
		    "No room on oustanding cmd array.\n");
1841
		goto queuing_error;
1842
	}
1843

1844 1845 1846 1847 1848
	/* Prep command array. */
	req->current_outstanding_cmd = handle;
	req->outstanding_cmds[handle] = sp;
	sp->handle = handle;

1849
	/* Adjust entry-counts as needed. */
1850 1851
	if (sp->type != SRB_SCSI_CMD)
		req_cnt = sp->iocbs;
1852

1853
skip_cmd_array:
1854 1855
	/* Check for room on request queue. */
	if (req->cnt < req_cnt) {
1856
		if (ha->mqenable || IS_QLA83XX(ha))
1857
			cnt = RD_REG_DWORD(&reg->isp25mq.req_q_out);
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		else if (IS_QLA82XX(ha))
			cnt = RD_REG_DWORD(&reg->isp82.req_q_out);
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		else if (IS_FWI2_CAPABLE(ha))
			cnt = RD_REG_DWORD(&reg->isp24.req_q_out);
		else
			cnt = qla2x00_debounce_register(
			    ISP_REQ_Q_OUT(ha, &reg->isp));

		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)
		goto queuing_error;

	/* Prep packet */
	req->cnt -= req_cnt;
	pkt = req->ring_ptr;
	memset(pkt, 0, REQUEST_ENTRY_SIZE);
	pkt->entry_count = req_cnt;
	pkt->handle = handle;

queuing_error:
	return pkt;
}

static void
qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
{
1889
	struct srb_iocb *lio = &sp->u.iocb_cmd;
1890 1891 1892

	logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
	logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
1893
	if (lio->u.logio.flags & SRB_LOGIN_COND_PLOGI)
1894
		logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
1895
	if (lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI)
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		logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
	logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
	logio->port_id[0] = sp->fcport->d_id.b.al_pa;
	logio->port_id[1] = sp->fcport->d_id.b.area;
	logio->port_id[2] = sp->fcport->d_id.b.domain;
	logio->vp_index = sp->fcport->vp_idx;
}

static void
qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
{
	struct qla_hw_data *ha = sp->fcport->vha->hw;
1908
	struct srb_iocb *lio = &sp->u.iocb_cmd;
1909 1910
	uint16_t opts;

1911
	mbx->entry_type = MBX_IOCB_TYPE;
1912 1913
	SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
	mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
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	opts = lio->u.logio.flags & SRB_LOGIN_COND_PLOGI ? BIT_0 : 0;
	opts |= lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI ? BIT_1 : 0;
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	if (HAS_EXTENDED_IDS(ha)) {
		mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
		mbx->mb10 = cpu_to_le16(opts);
	} else {
		mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
	}
	mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
	mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
	    sp->fcport->d_id.b.al_pa);
	mbx->mb9 = cpu_to_le16(sp->fcport->vp_idx);
}

static void
qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
{
	logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
	logio->control_flags =
	    cpu_to_le16(LCF_COMMAND_LOGO|LCF_IMPL_LOGO);
	logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
	logio->port_id[0] = sp->fcport->d_id.b.al_pa;
	logio->port_id[1] = sp->fcport->d_id.b.area;
	logio->port_id[2] = sp->fcport->d_id.b.domain;
	logio->vp_index = sp->fcport->vp_idx;
}

static void
qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
{
	struct qla_hw_data *ha = sp->fcport->vha->hw;

1946
	mbx->entry_type = MBX_IOCB_TYPE;
1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958
	SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
	mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
	mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
	    cpu_to_le16(sp->fcport->loop_id):
	    cpu_to_le16(sp->fcport->loop_id << 8);
	mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
	mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
	    sp->fcport->d_id.b.al_pa);
	mbx->mb9 = cpu_to_le16(sp->fcport->vp_idx);
	/* Implicit: mbx->mbx10 = 0. */
}

1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988
static void
qla24xx_adisc_iocb(srb_t *sp, struct logio_entry_24xx *logio)
{
	logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
	logio->control_flags = cpu_to_le16(LCF_COMMAND_ADISC);
	logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
	logio->vp_index = sp->fcport->vp_idx;
}

static void
qla2x00_adisc_iocb(srb_t *sp, struct mbx_entry *mbx)
{
	struct qla_hw_data *ha = sp->fcport->vha->hw;

	mbx->entry_type = MBX_IOCB_TYPE;
	SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
	mbx->mb0 = cpu_to_le16(MBC_GET_PORT_DATABASE);
	if (HAS_EXTENDED_IDS(ha)) {
		mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
		mbx->mb10 = cpu_to_le16(BIT_0);
	} else {
		mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | BIT_0);
	}
	mbx->mb2 = cpu_to_le16(MSW(ha->async_pd_dma));
	mbx->mb3 = cpu_to_le16(LSW(ha->async_pd_dma));
	mbx->mb6 = cpu_to_le16(MSW(MSD(ha->async_pd_dma)));
	mbx->mb7 = cpu_to_le16(LSW(MSD(ha->async_pd_dma)));
	mbx->mb9 = cpu_to_le16(sp->fcport->vp_idx);
}

1989 1990 1991 1992 1993 1994 1995 1996
static void
qla24xx_tm_iocb(srb_t *sp, struct tsk_mgmt_entry *tsk)
{
	uint32_t flags;
	unsigned int lun;
	struct fc_port *fcport = sp->fcport;
	scsi_qla_host_t *vha = fcport->vha;
	struct qla_hw_data *ha = vha->hw;
1997
	struct srb_iocb *iocb = &sp->u.iocb_cmd;
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
	struct req_que *req = vha->req;

	flags = iocb->u.tmf.flags;
	lun = iocb->u.tmf.lun;

	tsk->entry_type = TSK_MGMT_IOCB_TYPE;
	tsk->entry_count = 1;
	tsk->handle = MAKE_HANDLE(req->id, tsk->handle);
	tsk->nport_handle = cpu_to_le16(fcport->loop_id);
	tsk->timeout = cpu_to_le16(ha->r_a_tov / 10 * 2);
	tsk->control_flags = cpu_to_le32(flags);
	tsk->port_id[0] = fcport->d_id.b.al_pa;
	tsk->port_id[1] = fcport->d_id.b.area;
	tsk->port_id[2] = fcport->d_id.b.domain;
	tsk->vp_index = fcport->vp_idx;

	if (flags == TCF_LUN_RESET) {
		int_to_scsilun(lun, &tsk->lun);
		host_to_fcp_swap((uint8_t *)&tsk->lun,
			sizeof(tsk->lun));
	}
}

2021 2022 2023
static void
qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
{
2024
	struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036

        els_iocb->entry_type = ELS_IOCB_TYPE;
        els_iocb->entry_count = 1;
        els_iocb->sys_define = 0;
        els_iocb->entry_status = 0;
        els_iocb->handle = sp->handle;
        els_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
        els_iocb->tx_dsd_count = __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt);
        els_iocb->vp_index = sp->fcport->vp_idx;
        els_iocb->sof_type = EST_SOFI3;
        els_iocb->rx_dsd_count = __constant_cpu_to_le16(bsg_job->reply_payload.sg_cnt);

2037
	els_iocb->opcode =
2038
	    sp->type == SRB_ELS_CMD_RPT ?
2039 2040
	    bsg_job->request->rqst_data.r_els.els_code :
	    bsg_job->request->rqst_data.h_els.command_code;
2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064
        els_iocb->port_id[0] = sp->fcport->d_id.b.al_pa;
        els_iocb->port_id[1] = sp->fcport->d_id.b.area;
        els_iocb->port_id[2] = sp->fcport->d_id.b.domain;
        els_iocb->control_flags = 0;
        els_iocb->rx_byte_count =
            cpu_to_le32(bsg_job->reply_payload.payload_len);
        els_iocb->tx_byte_count =
            cpu_to_le32(bsg_job->request_payload.payload_len);

        els_iocb->tx_address[0] = cpu_to_le32(LSD(sg_dma_address
            (bsg_job->request_payload.sg_list)));
        els_iocb->tx_address[1] = cpu_to_le32(MSD(sg_dma_address
            (bsg_job->request_payload.sg_list)));
        els_iocb->tx_len = cpu_to_le32(sg_dma_len
            (bsg_job->request_payload.sg_list));

        els_iocb->rx_address[0] = cpu_to_le32(LSD(sg_dma_address
            (bsg_job->reply_payload.sg_list)));
        els_iocb->rx_address[1] = cpu_to_le32(MSD(sg_dma_address
            (bsg_job->reply_payload.sg_list)));
        els_iocb->rx_len = cpu_to_le32(sg_dma_len
            (bsg_job->reply_payload.sg_list));
}

2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
static void
qla2x00_ct_iocb(srb_t *sp, ms_iocb_entry_t *ct_iocb)
{
	uint16_t        avail_dsds;
	uint32_t        *cur_dsd;
	struct scatterlist *sg;
	int index;
	uint16_t tot_dsds;
	scsi_qla_host_t *vha = sp->fcport->vha;
	struct qla_hw_data *ha = vha->hw;
2075
	struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123
	int loop_iterartion = 0;
	int cont_iocb_prsnt = 0;
	int entry_count = 1;

	memset(ct_iocb, 0, sizeof(ms_iocb_entry_t));
	ct_iocb->entry_type = CT_IOCB_TYPE;
	ct_iocb->entry_status = 0;
	ct_iocb->handle1 = sp->handle;
	SET_TARGET_ID(ha, ct_iocb->loop_id, sp->fcport->loop_id);
	ct_iocb->status = __constant_cpu_to_le16(0);
	ct_iocb->control_flags = __constant_cpu_to_le16(0);
	ct_iocb->timeout = 0;
	ct_iocb->cmd_dsd_count =
	    __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt);
	ct_iocb->total_dsd_count =
	    __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt + 1);
	ct_iocb->req_bytecount =
	    cpu_to_le32(bsg_job->request_payload.payload_len);
	ct_iocb->rsp_bytecount =
	    cpu_to_le32(bsg_job->reply_payload.payload_len);

	ct_iocb->dseg_req_address[0] = cpu_to_le32(LSD(sg_dma_address
	    (bsg_job->request_payload.sg_list)));
	ct_iocb->dseg_req_address[1] = cpu_to_le32(MSD(sg_dma_address
	    (bsg_job->request_payload.sg_list)));
	ct_iocb->dseg_req_length = ct_iocb->req_bytecount;

	ct_iocb->dseg_rsp_address[0] = cpu_to_le32(LSD(sg_dma_address
	    (bsg_job->reply_payload.sg_list)));
	ct_iocb->dseg_rsp_address[1] = cpu_to_le32(MSD(sg_dma_address
	    (bsg_job->reply_payload.sg_list)));
	ct_iocb->dseg_rsp_length = ct_iocb->rsp_bytecount;

	avail_dsds = 1;
	cur_dsd = (uint32_t *)ct_iocb->dseg_rsp_address;
	index = 0;
	tot_dsds = bsg_job->reply_payload.sg_cnt;

	for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
		dma_addr_t       sle_dma;
		cont_a64_entry_t *cont_pkt;

		/* Allocate additional continuation packets? */
		if (avail_dsds == 0) {
			/*
			* Five DSDs are available in the Cont.
			* Type 1 IOCB.
			       */
2124 2125
			cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
			    vha->hw->req_q_map[0]);
2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141
			cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
			avail_dsds = 5;
			cont_iocb_prsnt = 1;
			entry_count++;
		}

		sle_dma = sg_dma_address(sg);
		*cur_dsd++   = cpu_to_le32(LSD(sle_dma));
		*cur_dsd++   = cpu_to_le32(MSD(sle_dma));
		*cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
		loop_iterartion++;
		avail_dsds--;
	}
	ct_iocb->entry_count = entry_count;
}

2142 2143 2144 2145 2146 2147 2148 2149 2150
static void
qla24xx_ct_iocb(srb_t *sp, struct ct_entry_24xx *ct_iocb)
{
	uint16_t        avail_dsds;
	uint32_t        *cur_dsd;
	struct scatterlist *sg;
	int index;
	uint16_t tot_dsds;
        scsi_qla_host_t *vha = sp->fcport->vha;
2151
	struct qla_hw_data *ha = vha->hw;
2152
	struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196
	int loop_iterartion = 0;
	int cont_iocb_prsnt = 0;
	int entry_count = 1;

	ct_iocb->entry_type = CT_IOCB_TYPE;
        ct_iocb->entry_status = 0;
        ct_iocb->sys_define = 0;
        ct_iocb->handle = sp->handle;

	ct_iocb->nport_handle = cpu_to_le16(sp->fcport->loop_id);
	ct_iocb->vp_index = sp->fcport->vp_idx;
        ct_iocb->comp_status = __constant_cpu_to_le16(0);

	ct_iocb->cmd_dsd_count =
            __constant_cpu_to_le16(bsg_job->request_payload.sg_cnt);
        ct_iocb->timeout = 0;
        ct_iocb->rsp_dsd_count =
            __constant_cpu_to_le16(bsg_job->reply_payload.sg_cnt);
        ct_iocb->rsp_byte_count =
            cpu_to_le32(bsg_job->reply_payload.payload_len);
        ct_iocb->cmd_byte_count =
            cpu_to_le32(bsg_job->request_payload.payload_len);
        ct_iocb->dseg_0_address[0] = cpu_to_le32(LSD(sg_dma_address
            (bsg_job->request_payload.sg_list)));
        ct_iocb->dseg_0_address[1] = cpu_to_le32(MSD(sg_dma_address
           (bsg_job->request_payload.sg_list)));
        ct_iocb->dseg_0_len = cpu_to_le32(sg_dma_len
            (bsg_job->request_payload.sg_list));

	avail_dsds = 1;
	cur_dsd = (uint32_t *)ct_iocb->dseg_1_address;
	index = 0;
	tot_dsds = bsg_job->reply_payload.sg_cnt;

	for_each_sg(bsg_job->reply_payload.sg_list, sg, tot_dsds, index) {
		dma_addr_t       sle_dma;
		cont_a64_entry_t *cont_pkt;

		/* Allocate additional continuation packets? */
		if (avail_dsds == 0) {
			/*
			* Five DSDs are available in the Cont.
			* Type 1 IOCB.
			       */
2197 2198
			cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
			    ha->req_q_map[0]);
2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214
			cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
			avail_dsds = 5;
			cont_iocb_prsnt = 1;
			entry_count++;
		}

		sle_dma = sg_dma_address(sg);
		*cur_dsd++   = cpu_to_le32(LSD(sle_dma));
		*cur_dsd++   = cpu_to_le32(MSD(sle_dma));
		*cur_dsd++   = cpu_to_le32(sg_dma_len(sg));
		loop_iterartion++;
		avail_dsds--;
	}
        ct_iocb->entry_count = entry_count;
}

2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241
/*
 * 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;
2242
	char tag[2];
2243 2244 2245 2246

	/* Setup device pointers. */
	ret = 0;
	reg = &ha->iobase->isp82;
2247
	cmd = GET_CMD_SP(sp);
2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350
	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;

2351 2352 2353
		ctx = sp->u.scmd.ctx =
		    mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
		if (!ctx) {
2354 2355 2356 2357
			ql_log(ql_log_fatal, vha, 0x3010,
			    "Failed to allocate ctx for cmd=%p.\n", cmd);
			goto queuing_error;
		}
2358

2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408
		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;

2409
		int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2410 2411 2412 2413
		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));
2414
		int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
		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;
			}
		}

2438 2439 2440 2441 2442
		/* Populate the FCP_PRIO. */
		if (ha->flags.fcp_prio_enabled)
			ctx->fcp_cmnd->task_attribute |=
			    sp->fcport->fcp_prio << 3;

2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493
		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;

2494
		int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2495
		host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
2496
		    sizeof(cmd_pkt->lun));
2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511

		/*
		 * 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;
			}
		}

2512 2513 2514 2515
		/* Populate the FCP_PRIO. */
		if (ha->flags.fcp_prio_enabled)
			cmd_pkt->task |= sp->fcport->fcp_prio << 3;

2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536
		/* 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;
2537
	cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582
	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);

2583 2584 2585
	if (sp->u.scmd.ctx) {
		mempool_free(sp->u.scmd.ctx, ha->ctx_mempool);
		sp->u.scmd.ctx = NULL;
2586 2587 2588 2589 2590 2591
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return QLA_FUNCTION_FAILED;
}

2592 2593 2594 2595 2596 2597 2598 2599 2600 2601
int
qla2x00_start_sp(srb_t *sp)
{
	int rval;
	struct qla_hw_data *ha = sp->fcport->vha->hw;
	void *pkt;
	unsigned long flags;

	rval = QLA_FUNCTION_FAILED;
	spin_lock_irqsave(&ha->hardware_lock, flags);
2602
	pkt = qla2x00_alloc_iocbs(sp->fcport->vha, sp);
2603 2604 2605
	if (!pkt) {
		ql_log(ql_log_warn, sp->fcport->vha, 0x700c,
		    "qla2x00_alloc_iocbs failed.\n");
2606
		goto done;
2607
	}
2608 2609

	rval = QLA_SUCCESS;
2610
	switch (sp->type) {
2611 2612
	case SRB_LOGIN_CMD:
		IS_FWI2_CAPABLE(ha) ?
2613
		    qla24xx_login_iocb(sp, pkt) :
2614 2615 2616 2617
		    qla2x00_login_iocb(sp, pkt);
		break;
	case SRB_LOGOUT_CMD:
		IS_FWI2_CAPABLE(ha) ?
2618
		    qla24xx_logout_iocb(sp, pkt) :
2619 2620
		    qla2x00_logout_iocb(sp, pkt);
		break;
2621 2622 2623 2624 2625
	case SRB_ELS_CMD_RPT:
	case SRB_ELS_CMD_HST:
		qla24xx_els_iocb(sp, pkt);
		break;
	case SRB_CT_CMD:
2626
		IS_FWI2_CAPABLE(ha) ?
2627 2628
		    qla24xx_ct_iocb(sp, pkt) :
		    qla2x00_ct_iocb(sp, pkt);
2629
		break;
2630 2631 2632 2633 2634
	case SRB_ADISC_CMD:
		IS_FWI2_CAPABLE(ha) ?
		    qla24xx_adisc_iocb(sp, pkt) :
		    qla2x00_adisc_iocb(sp, pkt);
		break;
2635 2636 2637
	case SRB_TM_CMD:
		qla24xx_tm_iocb(sp, pkt);
		break;
2638 2639 2640 2641 2642
	default:
		break;
	}

	wmb();
2643
	qla2x00_start_iocbs(sp->fcport->vha, ha->req_q_map[0]);
2644 2645 2646 2647
done:
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
	return rval;
}