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qla_iocb.c
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qla_iocb.c
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/*
* QLogic Fibre Channel HBA Driver
* Copyright (c) 2003-2014 QLogic Corporation
*
* See LICENSE.qla2xxx for copyright and licensing details.
*/
#include "qla_def.h"
#include "qla_target.h"
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <scsi/scsi_tcq.h>
static void qla25xx_set_que(srb_t *, struct rsp_que **);
/**
* qla2x00_get_cmd_direction() - Determine control_flag data direction.
* @cmd: SCSI command
*
* Returns the proper CF_* direction based on CDB.
*/
static inline uint16_t
qla2x00_get_cmd_direction(srb_t *sp)
{
uint16_t cflags;
struct scsi_cmnd *cmd = GET_CMD_SP(sp);
struct scsi_qla_host *vha = sp->fcport->vha;
cflags = 0;
/* Set transfer direction */
if (cmd->sc_data_direction == DMA_TO_DEVICE) {
cflags = CF_WRITE;
vha->qla_stats.output_bytes += scsi_bufflen(cmd);
vha->qla_stats.output_requests++;
} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
cflags = CF_READ;
vha->qla_stats.input_bytes += scsi_bufflen(cmd);
vha->qla_stats.input_requests++;
}
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 *
qla2x00_prep_cont_type0_iocb(struct scsi_qla_host *vha)
{
cont_entry_t *cont_pkt;
struct req_que *req = vha->req;
/* 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++;
}
cont_pkt = (cont_entry_t *)req->ring_ptr;
/* 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 *
qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *vha, struct req_que *req)
{
cont_a64_entry_t *cont_pkt;
/* 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++;
}
cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
/* Load packet defaults. */
*((uint32_t *)(&cont_pkt->entry_type)) = IS_QLAFX00(vha->hw) ?
__constant_cpu_to_le32(CONTINUE_A64_TYPE_FX00) :
__constant_cpu_to_le32(CONTINUE_A64_TYPE);
return (cont_pkt);
}
static inline int
qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
{
struct scsi_cmnd *cmd = GET_CMD_SP(sp);
uint8_t guard = scsi_host_get_guard(cmd->device->host);
/* We always use DIFF Bundling for best performance */
*fw_prot_opts = 0;
/* Translate SCSI opcode to a protection opcode */
switch (scsi_get_prot_op(cmd)) {
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:
if (guard & SHOST_DIX_GUARD_IP)
*fw_prot_opts |= PO_MODE_DIF_TCP_CKSUM;
else
*fw_prot_opts |= PO_MODE_DIF_PASS;
break;
default: /* Normal Request */
*fw_prot_opts |= PO_MODE_DIF_PASS;
break;
}
return scsi_prot_sg_count(cmd);
}
/*
* 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;
scsi_qla_host_t *vha;
struct scsi_cmnd *cmd;
struct scatterlist *sg;
int i;
cmd = GET_CMD_SP(sp);
/* Update entry type to indicate Command Type 2 IOCB */
*((uint32_t *)(&cmd_pkt->entry_type)) =
__constant_cpu_to_le32(COMMAND_TYPE);
/* No data transfer */
if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
cmd_pkt->byte_count = __constant_cpu_to_le32(0);
return;
}
vha = sp->fcport->vha;
cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
/* 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 */
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.
*/
cont_pkt = qla2x00_prep_cont_type0_iocb(vha);
cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address;
avail_dsds = 7;
}
*cur_dsd++ = cpu_to_le32(sg_dma_address(sg));
*cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
avail_dsds--;
}
}
/**
* 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;
scsi_qla_host_t *vha;
struct scsi_cmnd *cmd;
struct scatterlist *sg;
int i;
cmd = GET_CMD_SP(sp);
/* 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 */
if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
cmd_pkt->byte_count = __constant_cpu_to_le32(0);
return;
}
vha = sp->fcport->vha;
cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp));
/* 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 */
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.
*/
cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
avail_dsds = 5;
}
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--;
}
}
/**
* qla2x00_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
qla2x00_start_scsi(srb_t *sp)
{
int ret, nseg;
unsigned long flags;
scsi_qla_host_t *vha;
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;
struct device_reg_2xxx __iomem *reg;
struct qla_hw_data *ha;
struct req_que *req;
struct rsp_que *rsp;
char tag[2];
/* Setup device pointers. */
ret = 0;
vha = sp->fcport->vha;
ha = vha->hw;
reg = &ha->iobase->isp;
cmd = GET_CMD_SP(sp);
req = ha->req_q_map[0];
rsp = ha->rsp_q_map[0];
/* So we know we haven't pci_map'ed anything yet */
tot_dsds = 0;
/* Send marker if required */
if (vha->marker_needed != 0) {
if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
QLA_SUCCESS) {
return (QLA_FUNCTION_FAILED);
}
vha->marker_needed = 0;
}
/* Acquire ring specific lock */
spin_lock_irqsave(&ha->hardware_lock, flags);
/* Check for room in outstanding command list. */
handle = req->current_outstanding_cmd;
for (index = 1; index < req->num_outstanding_cmds; index++) {
handle++;
if (handle == req->num_outstanding_cmds)
handle = 1;
if (!req->outstanding_cmds[handle])
break;
}
if (index == req->num_outstanding_cmds)
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;
/* Calculate the number of request entries needed. */
req_cnt = ha->isp_ops->calc_req_entries(tot_dsds);
if (req->cnt < (req_cnt + 2)) {
cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg));
if (req->ring_index < cnt)
req->cnt = cnt - req->ring_index;
else
req->cnt = req->length -
(req->ring_index - cnt);
/* If still no head room then bail out */
if (req->cnt < (req_cnt + 2))
goto queuing_error;
}
/* Build command packet */
req->current_outstanding_cmd = handle;
req->outstanding_cmds[handle] = sp;
sp->handle = handle;
cmd->host_scribble = (unsigned char *)(unsigned long)handle;
req->cnt -= req_cnt;
cmd_pkt = (cmd_entry_t *)req->ring_ptr;
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);
/* Set target ID and LUN number*/
SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id);
cmd_pkt->lun = cpu_to_le16(cmd->device->lun);
/* Update tagged queuing modifier */
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;
}
} else {
cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG);
}
/* Load SCSI command packet. */
memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
/* Build IOCB segments */
ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds);
/* Set total data segment count. */
cmd_pkt->entry_count = (uint8_t)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. */
WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), req->ring_index);
RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
/* Manage unprocessed RIO/ZIO commands in response queue. */
if (vha->flags.process_response_queue &&
rsp->ring_ptr->signature != RESPONSE_PROCESSED)
qla2x00_process_response_queue(rsp);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return (QLA_SUCCESS);
queuing_error:
if (tot_dsds)
scsi_dma_unmap(cmd);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return (QLA_FUNCTION_FAILED);
}
/**
* qla2x00_start_iocbs() - Execute the IOCB command
*/
void
qla2x00_start_iocbs(struct scsi_qla_host *vha, struct req_que *req)
{
struct qla_hw_data *ha = vha->hw;
device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
if (IS_P3P_TYPE(ha)) {
qla82xx_start_iocbs(vha);
} else {
/* Adjust ring index. */
req->ring_index++;
if (req->ring_index == req->length) {
req->ring_index = 0;
req->ring_ptr = req->ring;
} else
req->ring_ptr++;
/* Set chip new ring index. */
if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
WRT_REG_DWORD(req->req_q_in, req->ring_index);
RD_REG_DWORD_RELAXED(&ha->iobase->isp24.hccr);
} else if (IS_QLAFX00(ha)) {
WRT_REG_DWORD(®->ispfx00.req_q_in, req->ring_index);
RD_REG_DWORD_RELAXED(®->ispfx00.req_q_in);
QLAFX00_SET_HST_INTR(ha, ha->rqstq_intr_code);
} else if (IS_FWI2_CAPABLE(ha)) {
WRT_REG_DWORD(®->isp24.req_q_in, req->ring_index);
RD_REG_DWORD_RELAXED(®->isp24.req_q_in);
} else {
WRT_REG_WORD(ISP_REQ_Q_IN(ha, ®->isp),
req->ring_index);
RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, ®->isp));
}
}
}
/**
* 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.
*
* Returns non-zero if a failure occurred, else zero.
*/
static int
__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)
{
mrk_entry_t *mrk;
struct mrk_entry_24xx *mrk24 = NULL;
struct qla_hw_data *ha = vha->hw;
scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
req = ha->req_q_map[0];
mrk = (mrk_entry_t *)qla2x00_alloc_iocbs(vha, NULL);
if (mrk == NULL) {
ql_log(ql_log_warn, base_vha, 0x3026,
"Failed to allocate Marker IOCB.\n");
return (QLA_FUNCTION_FAILED);
}
mrk->entry_type = MARKER_TYPE;
mrk->modifier = type;
if (type != MK_SYNC_ALL) {
if (IS_FWI2_CAPABLE(ha)) {
mrk24 = (struct mrk_entry_24xx *) mrk;
mrk24->nport_handle = cpu_to_le16(loop_id);
mrk24->lun[1] = LSB(lun);
mrk24->lun[2] = MSB(lun);
host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun));
mrk24->vp_index = vha->vp_idx;
mrk24->handle = MAKE_HANDLE(req->id, mrk24->handle);
} else {
SET_TARGET_ID(ha, mrk->target, loop_id);
mrk->lun = cpu_to_le16(lun);
}
}
wmb();
qla2x00_start_iocbs(vha, req);
return (QLA_SUCCESS);
}
int
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)
{
int ret;
unsigned long flags = 0;
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);
return (ret);
}
/*
* 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;
}
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;
cmd = GET_CMD_SP(sp);
/* 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);
vha->qla_stats.output_bytes += scsi_bufflen(cmd);
vha->qla_stats.output_requests++;
} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
cmd_pkt->control_flags =
__constant_cpu_to_le16(CF_READ_DATA);
vha->qla_stats.input_bytes += scsi_bufflen(cmd);
vha->qla_stats.input_requests++;
}
cur_seg = scsi_sglist(cmd);
ctx = GET_CMD_CTX_SP(sp);
while (tot_dsds) {
avail_dsds = (tot_dsds > QLA_DSDS_PER_IOCB) ?
QLA_DSDS_PER_IOCB : tot_dsds;
tot_dsds -= avail_dsds;
dsd_list_len = (avail_dsds + 1) * QLA_DSD_SIZE;
dsd_ptr = list_first_entry(&ha->gbl_dsd_list,
struct dsd_dma, list);
next_dsd = dsd_ptr->dsd_addr;
list_del(&dsd_ptr->list);
ha->gbl_dsd_avail--;
list_add_tail(&dsd_ptr->list, &ctx->dsd_list);
ctx->dsd_use_cnt++;
ha->gbl_dsd_inuse++;
if (first_iocb) {
first_iocb = 0;
dsd_seg = (uint32_t *)&cmd_pkt->fcp_data_dseg_address;
*dsd_seg++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
*dsd_seg++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
cmd_pkt->fcp_data_dseg_len = cpu_to_le32(dsd_list_len);
} else {
*cur_dsd++ = cpu_to_le32(LSD(dsd_ptr->dsd_list_dma));
*cur_dsd++ = cpu_to_le32(MSD(dsd_ptr->dsd_list_dma));
*cur_dsd++ = cpu_to_le32(dsd_list_len);
}
cur_dsd = (uint32_t *)next_dsd;
while (avail_dsds) {
dma_addr_t sle_dma;
sle_dma = sg_dma_address(cur_seg);
*cur_dsd++ = cpu_to_le32(LSD(sle_dma));
*cur_dsd++ = cpu_to_le32(MSD(sle_dma));
*cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));
cur_seg = sg_next(cur_seg);
avail_dsds--;
}
}
/* Null termination */
*cur_dsd++ = 0;
*cur_dsd++ = 0;
*cur_dsd++ = 0;
cmd_pkt->control_flags |= CF_DATA_SEG_DESCR_ENABLE;
return 0;
}
/*
* qla24xx_calc_dsd_lists() - Determine number of DSD list required
* for Command Type 6.
*
* @dsds: number of data segment decriptors needed
*
* Returns the number of dsd list needed to store @dsds.
*/
inline uint16_t
qla24xx_calc_dsd_lists(uint16_t dsds)
{
uint16_t dsd_lists = 0;
dsd_lists = (dsds/QLA_DSDS_PER_IOCB);
if (dsds % QLA_DSDS_PER_IOCB)
dsd_lists++;
return dsd_lists;
}
/**
* qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7
* IOCB types.
*
* @sp: SRB command to process
* @cmd_pkt: Command type 3 IOCB
* @tot_dsds: Total number of segments to transfer
*/
inline void
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;
scsi_qla_host_t *vha;
struct scsi_cmnd *cmd;
struct scatterlist *sg;
int i;
struct req_que *req;
cmd = GET_CMD_SP(sp);
/* 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 */
if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
cmd_pkt->byte_count = __constant_cpu_to_le32(0);
return;
}
vha = sp->fcport->vha;
req = vha->req;
/* Set transfer direction */
if (cmd->sc_data_direction == DMA_TO_DEVICE) {
cmd_pkt->task_mgmt_flags =
__constant_cpu_to_le16(TMF_WRITE_DATA);
vha->qla_stats.output_bytes += scsi_bufflen(cmd);
vha->qla_stats.output_requests++;
} else if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
cmd_pkt->task_mgmt_flags =
__constant_cpu_to_le16(TMF_READ_DATA);
vha->qla_stats.input_bytes += scsi_bufflen(cmd);
vha->qla_stats.input_requests++;
}
/* 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 */
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.
*/
cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
avail_dsds = 5;
}
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--;
}
}
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
qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
unsigned int protcnt)
{
struct scsi_cmnd *cmd = GET_CMD_SP(sp);
switch (scsi_get_prot_type(cmd)) {
case SCSI_PROT_DIF_TYPE0:
/*
* 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)));
if (!qla2x00_hba_err_chk_enabled(sp))
break;
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;
/*
* For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
* match LBA in CDB + N
*/
case SCSI_PROT_DIF_TYPE2:
pkt->app_tag = __constant_cpu_to_le16(0);
pkt->app_tag_mask[0] = 0x0;
pkt->app_tag_mask[1] = 0x0;
pkt->ref_tag = cpu_to_le32((uint32_t)
(0xffffffff & scsi_get_lba(cmd)));
if (!qla2x00_hba_err_chk_enabled(sp))
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;
/* 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:
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))
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;
}
}
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;
struct scsi_cmnd *cmd = GET_CMD_SP(sp);
prot_int = cmd->device->sector_size;
memset(&sgx, 0, sizeof(struct qla2_sgx));
sgx.tot_bytes = scsi_bufflen(cmd);
sgx.cur_sg = scsi_sglist(cmd);
sgx.sp = sp;
sg_prot = scsi_prot_sglist(cmd);
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,
&((struct crc_context *)sp->u.scmd.ctx)->dsd_list);