qla_iocb.c 75.1 KB
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/*
 * QLogic Fibre Channel HBA Driver
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 * Copyright (c)  2003-2013 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"
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#include "qla_target.h"
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#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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	struct scsi_qla_host *vha = sp->fcport->vha;
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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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		vha->qla_stats.output_bytes += scsi_bufflen(cmd);
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	} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
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		cflags = CF_READ;
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		vha->qla_stats.input_bytes += 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. */
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	*((uint32_t *)(&cont_pkt->entry_type)) = IS_QLAFX00(vha->hw) ?
	    __constant_cpu_to_le32(CONTINUE_A64_TYPE_FX00) :
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	    __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 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:
	case SCSI_PROT_WRITE_PASS:
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		if (guard & SHOST_DIX_GUARD_IP)
			*fw_prot_opts |= PO_MODE_DIF_TCP_CKSUM;
		else
			*fw_prot_opts |= PO_MODE_DIF_PASS;
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		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 < req->num_outstanding_cmds; index++) {
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		handle++;
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		if (handle == req->num_outstanding_cmds)
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			handle = 1;
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		if (!req->outstanding_cmds[handle])
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			break;
	}
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	if (index == req->num_outstanding_cmds)
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		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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		/* If still no head room then bail out */
		if (req->cnt < (req_cnt + 2))
			goto queuing_error;
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	}

	/* 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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	} else {
		cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG);
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	}
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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
 */
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void
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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);

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	if (IS_P3P_TYPE(ha)) {
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		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);
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			RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);
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		} else if (IS_QLAFX00(ha)) {
			WRT_REG_DWORD(&reg->ispfx00.req_q_in, req->ring_index);
			RD_REG_DWORD_RELAXED(&reg->ispfx00.req_q_in);
			QLAFX00_SET_HST_INTR(ha, ha->rqstq_intr_code);
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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;
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	struct mrk_entry_24xx *mrk24 = NULL;
	struct mrk_entry_fx00 *mrkfx = NULL;

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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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	req = ha->req_q_map[0];
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	mrk = (mrk_entry_t *)qla2x00_alloc_iocbs(vha, NULL);
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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");
L
Linus Torvalds 已提交
535 536 537 538

		return (QLA_FUNCTION_FAILED);
	}

539 540
	mrk->entry_type = MARKER_TYPE;
	mrk->modifier = type;
L
Linus Torvalds 已提交
541
	if (type != MK_SYNC_ALL) {
542 543 544 545 546 547 548 549 550
		if (IS_QLAFX00(ha)) {
			mrkfx = (struct mrk_entry_fx00 *) mrk;
			mrkfx->handle = MAKE_HANDLE(req->id, mrkfx->handle);
			mrkfx->handle_hi = 0;
			mrkfx->tgt_id = cpu_to_le16(loop_id);
			mrkfx->lun[1] = LSB(lun);
			mrkfx->lun[2] = MSB(lun);
			host_to_fcp_swap(mrkfx->lun, sizeof(mrkfx->lun));
		} else if (IS_FWI2_CAPABLE(ha)) {
551 552 553 554
			mrk24 = (struct mrk_entry_24xx *) mrk;
			mrk24->nport_handle = cpu_to_le16(loop_id);
			mrk24->lun[1] = LSB(lun);
			mrk24->lun[2] = MSB(lun);
555
			host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
556
			mrk24->vp_index = vha->vp_idx;
557
			mrk24->handle = MAKE_HANDLE(req->id, mrk24->handle);
558 559 560 561
		} else {
			SET_TARGET_ID(ha, mrk->target, loop_id);
			mrk->lun = cpu_to_le16(lun);
		}
L
Linus Torvalds 已提交
562 563 564
	}
	wmb();

565
	qla2x00_start_iocbs(vha, req);
L
Linus Torvalds 已提交
566 567 568 569

	return (QLA_SUCCESS);
}

A
Andrew Vasquez 已提交
570
int
571 572 573
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)
L
Linus Torvalds 已提交
574 575 576 577
{
	int ret;
	unsigned long flags = 0;

578 579 580
	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);
L
Linus Torvalds 已提交
581 582 583 584

	return (ret);
}

585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607
/*
 * qla2x00_issue_marker
 *
 * Issue marker
 * Caller CAN have hardware lock held as specified by ha_locked parameter.
 * Might release it, then reaquire.
 */
int qla2x00_issue_marker(scsi_qla_host_t *vha, int ha_locked)
{
	if (ha_locked) {
		if (__qla2x00_marker(vha, vha->req, vha->req->rsp, 0, 0,
					MK_SYNC_ALL) != QLA_SUCCESS)
			return QLA_FUNCTION_FAILED;
	} else {
		if (qla2x00_marker(vha, vha->req, vha->req->rsp, 0, 0,
					MK_SYNC_ALL) != QLA_SUCCESS)
			return QLA_FUNCTION_FAILED;
	}
	vha->marker_needed = 0;

	return QLA_SUCCESS;
}

608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623
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;
L
Linus Torvalds 已提交
624

625
	cmd = GET_CMD_SP(sp);
626

627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643
	/* 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);
644
		vha->qla_stats.output_bytes += scsi_bufflen(cmd);
645 646 647
	} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
		cmd_pkt->control_flags =
		    __constant_cpu_to_le16(CF_READ_DATA);
648
		vha->qla_stats.input_bytes += scsi_bufflen(cmd);
649 650 651
	}

	cur_seg = scsi_sglist(cmd);
652
	ctx = GET_CMD_CTX_SP(sp);
653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674

	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);
675
		} else {
676 677 678 679 680 681 682 683 684 685 686 687 688 689
			*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--;
690
		}
691 692
	}

693 694 695 696 697 698
	/* Null termination */
	*cur_dsd++ =  0;
	*cur_dsd++ = 0;
	*cur_dsd++ = 0;
	cmd_pkt->control_flags |= CF_DATA_SEG_DESCR_ENABLE;
	return 0;
699 700
}

701 702 703
/*
 * qla24xx_calc_dsd_lists() - Determine number of DSD list required
 * for Command Type 6.
704 705 706
 *
 * @dsds: number of data segment decriptors needed
 *
707
 * Returns the number of dsd list needed to store @dsds.
708
 */
709
inline uint16_t
710
qla24xx_calc_dsd_lists(uint16_t dsds)
711
{
712
	uint16_t dsd_lists = 0;
713

714 715 716 717
	dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
	if (dsds % QLA_DSDS_PER_IOCB)
		dsd_lists++;
	return dsd_lists;
718 719
}

720

721 722 723 724 725 726 727 728
/**
 * 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
 */
729
inline void
730 731 732 733 734
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;
735
	scsi_qla_host_t	*vha;
736
	struct scsi_cmnd *cmd;
737 738
	struct scatterlist *sg;
	int i;
739
	struct req_que *req;
740

741
	cmd = GET_CMD_SP(sp);
742 743 744 745 746 747

	/* 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 */
748
	if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
749 750 751 752
		cmd_pkt->byte_count = __constant_cpu_to_le32(0);
		return;
	}

753
	vha = sp->fcport->vha;
754
	req = vha->req;
755 756

	/* Set transfer direction */
757
	if (cmd->sc_data_direction == DMA_TO_DEVICE) {
758 759
		cmd_pkt->task_mgmt_flags =
		    __constant_cpu_to_le16(TMF_WRITE_DATA);
760
		vha->qla_stats.output_bytes += scsi_bufflen(cmd);
761
	} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
762 763
		cmd_pkt->task_mgmt_flags =
		    __constant_cpu_to_le16(TMF_READ_DATA);
764
		vha->qla_stats.input_bytes += scsi_bufflen(cmd);
765
	}
766 767 768 769 770 771

	/* 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 */
772 773 774 775 776 777 778 779 780 781 782

	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.
			 */
783
			cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
784 785
			cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
			avail_dsds = 5;
786
		}
787 788 789 790 791 792

		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--;
793 794 795
	}
}

796 797 798 799 800 801 802 803 804 805 806 807
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
808
qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
809 810
    unsigned int protcnt)
{
811
	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
812 813 814

	switch (scsi_get_prot_type(cmd)) {
	case SCSI_PROT_DIF_TYPE0:
815 816 817 818 819 820
		/*
		 * 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)));
821 822 823 824

		if (!qla2x00_hba_err_chk_enabled(sp))
			break;

825 826 827 828
		pkt->ref_tag_mask[0] = 0xff;
		pkt->ref_tag_mask[1] = 0xff;
		pkt->ref_tag_mask[2] = 0xff;
		pkt->ref_tag_mask[3] = 0xff;
829 830 831 832 833 834 835
		break;

	/*
	 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
	 * match LBA in CDB + N
	 */
	case SCSI_PROT_DIF_TYPE2:
836 837 838
		pkt->app_tag = __constant_cpu_to_le16(0);
		pkt->app_tag_mask[0] = 0x0;
		pkt->app_tag_mask[1] = 0x0;
839 840 841 842

		pkt->ref_tag = cpu_to_le32((uint32_t)
		    (0xffffffff & scsi_get_lba(cmd)));

843 844 845
		if (!qla2x00_hba_err_chk_enabled(sp))
			break;

846 847 848 849 850
		/* 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;
851 852 853 854 855 856 857 858 859 860 861 862 863 864
		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:
865 866 867 868 869 870 871
		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))
872 873 874 875 876 877 878 879 880 881 882
			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;
	}
}

883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958
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;
959
	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
960 961 962 963

	prot_int = cmd->device->sector_size;

	memset(&sgx, 0, sizeof(struct qla2_sgx));
964 965
	sgx.tot_bytes = scsi_bufflen(cmd);
	sgx.cur_sg = scsi_sglist(cmd);
966 967
	sgx.sp = sp;

968
	sg_prot = scsi_prot_sglist(cmd);
969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001

	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,
1002
			    &((struct crc_context *)sp->u.scmd.ctx)->dsd_list);
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020

			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;
1021

1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037
			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;
}
1038

1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050
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;
1051
	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1052

1053
	scsi_for_each_sg(cmd, sg, tot_dsds, i) {
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
		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 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
		*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--;

	}
	/* 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;

1123
	cmd = GET_CMD_SP(sp);
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153
	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,
1154
			    &((struct crc_context *)sp->u.scmd.ctx)->dsd_list);
1155 1156 1157 1158 1159 1160 1161 1162 1163 1164

			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);
1165

1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194
		*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--;
	}
	/* 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;
	int			sgc;
1195
	uint32_t		total_bytes = 0;
1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
	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;
1207
	char			tag[2];
1208

1209
	cmd = GET_CMD_SP(sp);
1210 1211 1212 1213 1214 1215

	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);

1216 1217 1218
	vha = sp->fcport->vha;
	ha = vha->hw;

1219 1220 1221 1222 1223 1224 1225
	/* 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;
	}

1226
	cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
1227 1228 1229 1230 1231 1232 1233 1234 1235 1236

	/* 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);
	}

1237 1238 1239 1240
	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))
1241 1242 1243
		bundling = 0;

	/* Allocate CRC context from global pool */
1244 1245
	crc_ctx_pkt = sp->u.scmd.ctx =
	    dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262

	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);

1263
	qla24xx_set_t10dif_tags(sp, (struct fw_dif_context *)
1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290
	    &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;

1291
	int_to_scsilun(cmd->device->lun, &fcp_cmnd->lun);
1292 1293 1294 1295 1296 1297
	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));
1298
	fcp_cmnd->task_management = 0;
1299

1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311
	/*
	 * 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:
1312
		    fcp_cmnd->task_attribute = TSK_SIMPLE;
1313 1314 1315
		    break;
		}
	} else {
1316
		fcp_cmnd->task_attribute = TSK_SIMPLE;
1317 1318
	}

1319 1320 1321 1322 1323
	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;
1324 1325
	dif_bytes = (data_bytes / blk_size) * 8;

1326
	switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340
	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();
1341 1342
	}

1343
	if (!qla2x00_hba_err_chk_enabled(sp))
1344
		fw_prot_opts |= 0x10; /* Disable Guard tag checking */
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354
	/* HBA error checking enabled */
	else if (IS_PI_UNINIT_CAPABLE(ha)) {
		if ((scsi_get_prot_type(GET_CMD_SP(sp)) == SCSI_PROT_DIF_TYPE1)
		    || (scsi_get_prot_type(GET_CMD_SP(sp)) ==
			SCSI_PROT_DIF_TYPE2))
			fw_prot_opts |= BIT_10;
		else if (scsi_get_prot_type(GET_CMD_SP(sp)) ==
		    SCSI_PROT_DIF_TYPE3)
			fw_prot_opts |= BIT_11;
	}
1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380

	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);

1381 1382 1383 1384
	if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
		cmd_pkt->byte_count = __constant_cpu_to_le32(0);
		return QLA_SUCCESS;
	}
1385 1386 1387 1388
	/* Walks data segments */

	cmd_pkt->control_flags |=
	    __constant_cpu_to_le16(CF_DATA_SEG_DESCR_ENABLE);
1389 1390 1391 1392 1393 1394

	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,
1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413
	    (tot_dsds - tot_prot_dsds)))
		goto crc_queuing_error;

	if (bundling && tot_prot_dsds) {
		/* Walks dif segments */
		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;
}
1414 1415 1416 1417 1418

/**
 * qla24xx_start_scsi() - Send a SCSI command to the ISP
 * @sp: command to send to the ISP
 *
1419
 * Returns non-zero if a failure occurred, else zero.
1420 1421 1422 1423
 */
int
qla24xx_start_scsi(srb_t *sp)
{
1424
	int		ret, nseg;
1425 1426 1427 1428 1429 1430 1431 1432
	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;
1433 1434
	struct req_que *req = NULL;
	struct rsp_que *rsp = NULL;
1435
	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1436
	struct scsi_qla_host *vha = sp->fcport->vha;
1437
	struct qla_hw_data *ha = vha->hw;
1438
	char		tag[2];
1439 1440 1441

	/* Setup device pointers. */
	ret = 0;
1442

1443 1444
	qla25xx_set_que(sp, &rsp);
	req = vha->req;
1445

1446 1447 1448 1449
	/* So we know we haven't pci_map'ed anything yet */
	tot_dsds = 0;

	/* Send marker if required */
1450
	if (vha->marker_needed != 0) {
1451 1452
		if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
		    QLA_SUCCESS)
1453
			return QLA_FUNCTION_FAILED;
1454
		vha->marker_needed = 0;
1455 1456 1457
	}

	/* Acquire ring specific lock */
1458
	spin_lock_irqsave(&ha->hardware_lock, flags);
1459 1460

	/* Check for room in outstanding command list. */
1461
	handle = req->current_outstanding_cmd;
1462
	for (index = 1; index < req->num_outstanding_cmds; index++) {
1463
		handle++;
1464
		if (handle == req->num_outstanding_cmds)
1465
			handle = 1;
1466
		if (!req->outstanding_cmds[handle])
1467 1468
			break;
	}
1469
	if (index == req->num_outstanding_cmds)
1470 1471 1472
		goto queuing_error;

	/* Map the sg table so we have an accurate count of sg entries needed */
1473 1474 1475 1476
	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))
1477
			goto queuing_error;
1478 1479 1480
	} else
		nseg = 0;

1481
	tot_dsds = nseg;
1482
	req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
1483
	if (req->cnt < (req_cnt + 2)) {
1484
		cnt = RD_REG_DWORD_RELAXED(req->req_q_out);
1485

1486 1487
		if (req->ring_index < cnt)
			req->cnt = cnt - req->ring_index;
1488
		else
1489 1490
			req->cnt = req->length -
				(req->ring_index - cnt);
1491 1492
		if (req->cnt < (req_cnt + 2))
			goto queuing_error;
1493 1494 1495
	}

	/* Build command packet. */
1496 1497
	req->current_outstanding_cmd = handle;
	req->outstanding_cmds[handle] = sp;
1498
	sp->handle = handle;
1499
	cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1500
	req->cnt -= req_cnt;
1501

1502
	cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
1503
	cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
1504 1505

	/* Zero out remaining portion of packet. */
1506
	/*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
1507 1508 1509 1510 1511 1512 1513 1514 1515
	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;
1516
	cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
1517

1518
	int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1519
	host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
1520

1521 1522 1523 1524 1525 1526 1527 1528 1529
	/* 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;
1530 1531 1532
		default:
		    cmd_pkt->task = TSK_SIMPLE;
		    break;
1533
		}
1534 1535
	} else {
		cmd_pkt->task = TSK_SIMPLE;
1536 1537
	}

1538 1539 1540 1541
	/* 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));

1542
	cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
1543 1544 1545 1546 1547 1548

	/* 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;
1549 1550
	/* Specify response queue number where completion should happen */
	cmd_pkt->entry_status = (uint8_t) rsp->id;
1551 1552
	wmb();
	/* Adjust ring index. */
1553 1554 1555 1556
	req->ring_index++;
	if (req->ring_index == req->length) {
		req->ring_index = 0;
		req->ring_ptr = req->ring;
1557
	} else
1558
		req->ring_ptr++;
1559 1560 1561 1562

	sp->flags |= SRB_DMA_VALID;

	/* Set chip new ring index. */
1563 1564
	WRT_REG_DWORD(req->req_q_in, req->ring_index);
	RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);
1565

1566
	/* Manage unprocessed RIO/ZIO commands in response queue. */
1567
	if (vha->flags.process_response_queue &&
1568
		rsp->ring_ptr->signature != RESPONSE_PROCESSED)
1569
		qla24xx_process_response_queue(vha, rsp);
1570

1571
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
1572 1573 1574
	return QLA_SUCCESS;

queuing_error:
1575 1576 1577
	if (tot_dsds)
		scsi_dma_unmap(cmd);

1578
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
1579 1580

	return QLA_FUNCTION_FAILED;
L
Linus Torvalds 已提交
1581
}
1582

1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603
/**
 * 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;
1604
	struct scsi_cmnd	*cmd = GET_CMD_SP(sp);
1605 1606 1607 1608 1609 1610 1611
	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

1612 1613 1614 1615 1616
	/* 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);
	}
1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638

	/* 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;
1639
	for (index = 1; index < req->num_outstanding_cmds; index++) {
1640
		handle++;
1641
		if (handle == req->num_outstanding_cmds)
1642 1643 1644 1645 1646
			handle = 1;
		if (!req->outstanding_cmds[handle])
			break;
	}

1647
	if (index == req->num_outstanding_cmds)
1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658
		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;
1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674

		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++;
		}
1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688
	} 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;
1689 1690 1691 1692 1693

		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;
		}
1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709
	} 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);
1710 1711
		if (req->cnt < (req_cnt + 2))
			goto queuing_error;
1712 1713 1714 1715 1716 1717 1718
	}

	status |= QDSS_GOT_Q_SPACE;

	/* Build header part of command packet (excluding the OPCODE). */
	req->current_outstanding_cmd = handle;
	req->outstanding_cmds[handle] = sp;
1719
	sp->handle = handle;
1720
	cmd->host_scribble = (unsigned char *)(unsigned long)handle;
1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735
	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;

1736
	int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786
	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;
}


1787
static void qla25xx_set_que(srb_t *sp, struct rsp_que **rsp)
1788
{
1789
	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
1790 1791 1792
	struct qla_hw_data *ha = sp->fcport->vha->hw;
	int affinity = cmd->request->cpu;

1793
	if (ha->flags.cpu_affinity_enabled && affinity >= 0 &&
1794
		affinity < ha->max_rsp_queues - 1)
1795
		*rsp = ha->rsp_q_map[affinity + 1];
1796
	 else
1797 1798
		*rsp = ha->rsp_q_map[0];
}
1799 1800

/* Generic Control-SRB manipulation functions. */
1801 1802
void *
qla2x00_alloc_iocbs(scsi_qla_host_t *vha, srb_t *sp)
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812
{
	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;
1813 1814 1815 1816
	handle = 0;

	if (!sp)
		goto skip_cmd_array;
1817 1818 1819

	/* Check for room in outstanding command list. */
	handle = req->current_outstanding_cmd;
1820
	for (index = 1; req->num_outstanding_cmds; index++) {
1821
		handle++;
1822
		if (handle == req->num_outstanding_cmds)
1823 1824 1825 1826
			handle = 1;
		if (!req->outstanding_cmds[handle])
			break;
	}
1827
	if (index == req->num_outstanding_cmds) {
1828
		ql_log(ql_log_warn, vha, 0x700b,
1829
		    "No room on outstanding cmd array.\n");
1830
		goto queuing_error;
1831
	}
1832

1833 1834 1835 1836 1837
	/* Prep command array. */
	req->current_outstanding_cmd = handle;
	req->outstanding_cmds[handle] = sp;
	sp->handle = handle;

1838
	/* Adjust entry-counts as needed. */
1839 1840
	if (sp->type != SRB_SCSI_CMD)
		req_cnt = sp->iocbs;
1841

1842
skip_cmd_array:
1843 1844
	/* Check for room on request queue. */
	if (req->cnt < req_cnt) {
1845
		if (ha->mqenable || IS_QLA83XX(ha))
1846
			cnt = RD_REG_DWORD(&reg->isp25mq.req_q_out);
1847
		else if (IS_P3P_TYPE(ha))
1848
			cnt = RD_REG_DWORD(&reg->isp82.req_q_out);
1849 1850
		else if (IS_FWI2_CAPABLE(ha))
			cnt = RD_REG_DWORD(&reg->isp24.req_q_out);
1851 1852
		else if (IS_QLAFX00(ha))
			cnt = RD_REG_DWORD(&reg->ispfx00.req_q_out);
1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869
		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);
1870
	if (IS_QLAFX00(ha)) {
1871 1872
		WRT_REG_BYTE((void __iomem *)&pkt->entry_count, req_cnt);
		WRT_REG_WORD((void __iomem *)&pkt->handle, handle);
1873 1874 1875 1876
	} else {
		pkt->entry_count = req_cnt;
		pkt->handle = handle;
	}
1877 1878 1879 1880 1881 1882 1883 1884

queuing_error:
	return pkt;
}

static void
qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
{
1885
	struct srb_iocb *lio = &sp->u.iocb_cmd;
1886 1887 1888

	logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
	logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
1889
	if (lio->u.logio.flags & SRB_LOGIN_COND_PLOGI)
1890
		logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
1891
	if (lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI)
1892 1893 1894 1895 1896
		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;
1897
	logio->vp_index = sp->fcport->vha->vp_idx;
1898 1899 1900 1901 1902 1903
}

static void
qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
{
	struct qla_hw_data *ha = sp->fcport->vha->hw;
1904
	struct srb_iocb *lio = &sp->u.iocb_cmd;
1905 1906
	uint16_t opts;

1907
	mbx->entry_type = MBX_IOCB_TYPE;
1908 1909
	SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
	mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
1910 1911
	opts = lio->u.logio.flags & SRB_LOGIN_COND_PLOGI ? BIT_0 : 0;
	opts |= lio->u.logio.flags & SRB_LOGIN_SKIP_PRLI ? BIT_1 : 0;
1912 1913 1914 1915 1916 1917 1918 1919 1920
	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);
1921
	mbx->mb9 = cpu_to_le16(sp->fcport->vha->vp_idx);
1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933
}

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;
1934
	logio->vp_index = sp->fcport->vha->vp_idx;
1935 1936 1937 1938 1939 1940 1941
}

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

1942
	mbx->entry_type = MBX_IOCB_TYPE;
1943 1944 1945 1946 1947 1948 1949 1950
	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);
1951
	mbx->mb9 = cpu_to_le16(sp->fcport->vha->vp_idx);
1952 1953 1954
	/* Implicit: mbx->mbx10 = 0. */
}

1955 1956 1957 1958 1959 1960
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);
1961
	logio->vp_index = sp->fcport->vha->vp_idx;
1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981
}

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)));
1982
	mbx->mb9 = cpu_to_le16(sp->fcport->vha->vp_idx);
1983 1984
}

1985 1986 1987 1988 1989 1990 1991 1992
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;
1993
	struct srb_iocb *iocb = &sp->u.iocb_cmd;
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
	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;
2008
	tsk->vp_index = fcport->vha->vp_idx;
2009 2010 2011 2012 2013 2014 2015 2016

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

2017 2018 2019
static void
qla24xx_els_iocb(srb_t *sp, struct els_entry_24xx *els_iocb)
{
2020
	struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2021 2022 2023 2024 2025 2026 2027 2028

        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);
2029
	els_iocb->vp_index = sp->fcport->vha->vp_idx;
2030 2031 2032
        els_iocb->sof_type = EST_SOFI3;
        els_iocb->rx_dsd_count = __constant_cpu_to_le16(bsg_job->reply_payload.sg_cnt);

2033
	els_iocb->opcode =
2034
	    sp->type == SRB_ELS_CMD_RPT ?
2035 2036
	    bsg_job->request->rqst_data.r_els.els_code :
	    bsg_job->request->rqst_data.h_els.command_code;
2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060
        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));
}

2061 2062 2063 2064 2065 2066 2067 2068 2069 2070
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;
2071
	struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2072 2073 2074 2075 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
	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.
			       */
2120 2121
			cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
			    vha->hw->req_q_map[0]);
2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137
			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;
}

2138 2139 2140 2141 2142 2143 2144 2145 2146
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;
2147
	struct qla_hw_data *ha = vha->hw;
2148
	struct fc_bsg_job *bsg_job = sp->u.bsg_job;
2149 2150 2151 2152 2153 2154 2155 2156 2157 2158
	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);
2159
	ct_iocb->vp_index = sp->fcport->vha->vp_idx;
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
        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.
			       */
2193 2194
			cont_pkt = qla2x00_prep_cont_type1_iocb(vha,
			    ha->req_q_map[0]);
2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210
			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;
}

2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237
/*
 * 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;
2238
	char tag[2];
2239 2240 2241 2242

	/* Setup device pointers. */
	ret = 0;
	reg = &ha->iobase->isp82;
2243
	cmd = GET_CMD_SP(sp);
2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267
	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;
2268
	for (index = 1; index < req->num_outstanding_cmds; index++) {
2269
		handle++;
2270
		if (handle == req->num_outstanding_cmds)
2271 2272 2273 2274
			handle = 1;
		if (!req->outstanding_cmds[handle])
			break;
	}
2275
	if (index == req->num_outstanding_cmds)
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
		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);
2342 2343
			if (req->cnt < (req_cnt + 2))
				goto queuing_error;
2344 2345
		}

2346 2347 2348
		ctx = sp->u.scmd.ctx =
		    mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
		if (!ctx) {
2349 2350 2351 2352
			ql_log(ql_log_fatal, vha, 0x3010,
			    "Failed to allocate ctx for cmd=%p.\n", cmd);
			goto queuing_error;
		}
2353

2354 2355 2356 2357 2358 2359
		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);
2360
			goto queuing_error;
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
		}

		/* 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;
2398
		cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
2399 2400 2401 2402 2403

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

2404
		int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2405 2406 2407 2408
		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));
2409
		int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432
		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;
			}
		}

2433 2434 2435 2436 2437
		/* Populate the FCP_PRIO. */
		if (ha->flags.fcp_prio_enabled)
			ctx->fcp_cmnd->task_attribute |=
			    sp->fcport->fcp_prio << 3;

2438 2439 2440 2441 2442 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
		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;
2487
		cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
2488

2489
		int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
2490
		host_to_fcp_swap((uint8_t *)&cmd_pkt->lun,
2491
		    sizeof(cmd_pkt->lun));
2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506

		/*
		 * 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;
			}
		}

2507 2508 2509 2510
		/* Populate the FCP_PRIO. */
		if (ha->flags.fcp_prio_enabled)
			cmd_pkt->task |= sp->fcport->fcp_prio << 3;

2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531
		/* 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;
2532
	cmd->host_scribble = (unsigned char *)(unsigned long)handle;
2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555
	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();
2556
		while (RD_REG_DWORD((void __iomem *)ha->nxdb_rd_ptr) != dbval) {
2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577
			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);

2578 2579 2580
	if (sp->u.scmd.ctx) {
		mempool_free(sp->u.scmd.ctx, ha->ctx_mempool);
		sp->u.scmd.ctx = NULL;
2581 2582 2583 2584 2585 2586
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return QLA_FUNCTION_FAILED;
}

2587 2588 2589 2590 2591 2592 2593 2594 2595 2596
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);
2597
	pkt = qla2x00_alloc_iocbs(sp->fcport->vha, sp);
2598 2599 2600
	if (!pkt) {
		ql_log(ql_log_warn, sp->fcport->vha, 0x700c,
		    "qla2x00_alloc_iocbs failed.\n");
2601
		goto done;
2602
	}
2603 2604

	rval = QLA_SUCCESS;
2605
	switch (sp->type) {
2606 2607
	case SRB_LOGIN_CMD:
		IS_FWI2_CAPABLE(ha) ?
2608
		    qla24xx_login_iocb(sp, pkt) :
2609 2610 2611 2612
		    qla2x00_login_iocb(sp, pkt);
		break;
	case SRB_LOGOUT_CMD:
		IS_FWI2_CAPABLE(ha) ?
2613
		    qla24xx_logout_iocb(sp, pkt) :
2614 2615
		    qla2x00_logout_iocb(sp, pkt);
		break;
2616 2617 2618 2619 2620
	case SRB_ELS_CMD_RPT:
	case SRB_ELS_CMD_HST:
		qla24xx_els_iocb(sp, pkt);
		break;
	case SRB_CT_CMD:
2621
		IS_FWI2_CAPABLE(ha) ?
2622 2623
		    qla24xx_ct_iocb(sp, pkt) :
		    qla2x00_ct_iocb(sp, pkt);
2624
		break;
2625 2626 2627 2628 2629
	case SRB_ADISC_CMD:
		IS_FWI2_CAPABLE(ha) ?
		    qla24xx_adisc_iocb(sp, pkt) :
		    qla2x00_adisc_iocb(sp, pkt);
		break;
2630
	case SRB_TM_CMD:
2631 2632 2633 2634 2635 2636 2637 2638 2639 2640
		IS_QLAFX00(ha) ?
		    qlafx00_tm_iocb(sp, pkt) :
		    qla24xx_tm_iocb(sp, pkt);
		break;
	case SRB_FXIOCB_DCMD:
	case SRB_FXIOCB_BCMD:
		qlafx00_fxdisc_iocb(sp, pkt);
		break;
	case SRB_ABT_CMD:
		qlafx00_abort_iocb(sp, pkt);
2641
		break;
2642 2643 2644 2645 2646
	default:
		break;
	}

	wmb();
2647
	qla2x00_start_iocbs(sp->fcport->vha, ha->req_q_map[0]);
2648 2649 2650 2651
done:
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
	return rval;
}
2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780

static void
qla25xx_build_bidir_iocb(srb_t *sp, struct scsi_qla_host *vha,
				struct cmd_bidir *cmd_pkt, uint32_t tot_dsds)
{
	uint16_t avail_dsds;
	uint32_t *cur_dsd;
	uint32_t req_data_len = 0;
	uint32_t rsp_data_len = 0;
	struct scatterlist *sg;
	int index;
	int entry_count = 1;
	struct fc_bsg_job *bsg_job = sp->u.bsg_job;

	/*Update entry type to indicate bidir command */
	*((uint32_t *)(&cmd_pkt->entry_type)) =
		__constant_cpu_to_le32(COMMAND_BIDIRECTIONAL);

	/* Set the transfer direction, in this set both flags
	 * Also set the BD_WRAP_BACK flag, firmware will take care
	 * assigning DID=SID for outgoing pkts.
	 */
	cmd_pkt->wr_dseg_count = cpu_to_le16(bsg_job->request_payload.sg_cnt);
	cmd_pkt->rd_dseg_count = cpu_to_le16(bsg_job->reply_payload.sg_cnt);
	cmd_pkt->control_flags =
			__constant_cpu_to_le16(BD_WRITE_DATA | BD_READ_DATA |
							BD_WRAP_BACK);

	req_data_len = rsp_data_len = bsg_job->request_payload.payload_len;
	cmd_pkt->wr_byte_count = cpu_to_le32(req_data_len);
	cmd_pkt->rd_byte_count = cpu_to_le32(rsp_data_len);
	cmd_pkt->timeout = cpu_to_le16(qla2x00_get_async_timeout(vha) + 2);

	vha->bidi_stats.transfer_bytes += req_data_len;
	vha->bidi_stats.io_count++;

	/* Only one dsd is available for bidirectional IOCB, remaining dsds
	 * are bundled in continuation iocb
	 */
	avail_dsds = 1;
	cur_dsd = (uint32_t *)&cmd_pkt->fcp_data_dseg_address;

	index = 0;

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

		/* Allocate additional continuation packets */
		if (avail_dsds == 0) {
			/* Continuation type 1 IOCB can accomodate
			 * 5 DSDS
			 */
			cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
			cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
			avail_dsds = 5;
			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));
		avail_dsds--;
	}
	/* For read request DSD will always goes to continuation IOCB
	 * and follow the write DSD. If there is room on the current IOCB
	 * then it is added to that IOCB else new continuation IOCB is
	 * allocated.
	 */
	for_each_sg(bsg_job->reply_payload.sg_list, sg,
				bsg_job->reply_payload.sg_cnt, index) {
		dma_addr_t sle_dma;
		cont_a64_entry_t *cont_pkt;

		/* Allocate additional continuation packets */
		if (avail_dsds == 0) {
			/* Continuation type 1 IOCB can accomodate
			 * 5 DSDS
			 */
			cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
			cur_dsd = (uint32_t *) cont_pkt->dseg_0_address;
			avail_dsds = 5;
			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));
		avail_dsds--;
	}
	/* This value should be same as number of IOCB required for this cmd */
	cmd_pkt->entry_count = entry_count;
}

int
qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds)
{

	struct qla_hw_data *ha = vha->hw;
	unsigned long flags;
	uint32_t handle;
	uint32_t index;
	uint16_t req_cnt;
	uint16_t cnt;
	uint32_t *clr_ptr;
	struct cmd_bidir *cmd_pkt = NULL;
	struct rsp_que *rsp;
	struct req_que *req;
	int rval = EXT_STATUS_OK;

	rval = QLA_SUCCESS;

	rsp = ha->rsp_q_map[0];
	req = vha->req;

	/* Send marker if required */
	if (vha->marker_needed != 0) {
		if (qla2x00_marker(vha, req,
			rsp, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS)
			return EXT_STATUS_MAILBOX;
		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;
2781
	for (index = 1; index < req->num_outstanding_cmds; index++) {
2782
		handle++;
2783
	if (handle == req->num_outstanding_cmds)
2784 2785 2786 2787 2788
		handle = 1;
	if (!req->outstanding_cmds[handle])
		break;
	}

2789
	if (index == req->num_outstanding_cmds) {
2790 2791 2792 2793 2794 2795 2796 2797 2798
		rval = EXT_STATUS_BUSY;
		goto queuing_error;
	}

	/* Calculate number of IOCB required */
	req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);

	/* Check for room on request queue. */
	if (req->cnt < req_cnt + 2) {
2799
		cnt = RD_REG_DWORD_RELAXED(req->req_q_out);
2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840

		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) {
		rval = EXT_STATUS_BUSY;
		goto queuing_error;
	}

	cmd_pkt = (struct cmd_bidir *)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);

	/* Set NPORT-ID  (of vha)*/
	cmd_pkt->nport_handle = cpu_to_le16(vha->self_login_loop_id);
	cmd_pkt->port_id[0] = vha->d_id.b.al_pa;
	cmd_pkt->port_id[1] = vha->d_id.b.area;
	cmd_pkt->port_id[2] = vha->d_id.b.domain;

	qla25xx_build_bidir_iocb(sp, vha, cmd_pkt, tot_dsds);
	cmd_pkt->entry_status = (uint8_t) rsp->id;
	/* Build command packet. */
	req->current_outstanding_cmd = handle;
	req->outstanding_cmds[handle] = sp;
	sp->handle = handle;
	req->cnt -= req_cnt;

	/* Send the command to the firmware */
	wmb();
	qla2x00_start_iocbs(vha, req);
queuing_error:
	spin_unlock_irqrestore(&ha->hardware_lock, flags);
	return rval;
}