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[SCSI] qla2xxx: Add ISP24xx IOCB manipulation routines.
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Add ISP24xx IOCB manipulation routines.

Add appropriate glue-code for ISP24xx support while
manipulting IOCB packets.  Add an ISP24xx specific
'start_scsi' routine due to command-type-7 layout
changes.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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Andrew Vasquez authored and James Bottomley committed Jul 14, 2005
1 parent 459c537 commit 2b6c0ce
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Showing 3 changed files with 323 additions and 16 deletions.
1 change: 1 addition & 0 deletions drivers/scsi/qla2xxx/qla_gbl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,7 @@ extern uint16_t qla2x00_calc_iocbs_64(uint16_t);
extern void qla2x00_build_scsi_iocbs_32(srb_t *, cmd_entry_t *, uint16_t);
extern void qla2x00_build_scsi_iocbs_64(srb_t *, cmd_entry_t *, uint16_t);
extern int qla2x00_start_scsi(srb_t *sp);
extern int qla24xx_start_scsi(srb_t *sp);
int qla2x00_marker(scsi_qla_host_t *, uint16_t, uint16_t, uint8_t);
int __qla2x00_marker(scsi_qla_host_t *, uint16_t, uint16_t, uint8_t);

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13 changes: 13 additions & 0 deletions drivers/scsi/qla2xxx/qla_inline.h
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Original file line number Diff line number Diff line change
Expand Up @@ -236,6 +236,19 @@ qla2x00_delete_timer_from_cmd(srb_t *sp)
}
}

static inline uint8_t *host_to_fcp_swap(uint8_t *, uint32_t);
static inline uint8_t *
host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
{
uint32_t *ifcp = (uint32_t *) fcp;
uint32_t *ofcp = (uint32_t *) fcp;
uint32_t iter = bsize >> 2;

for (; iter ; iter--)
*ofcp++ = swab32(*ifcp++);

return fcp;
}

static inline int qla2x00_is_reserved_id(scsi_qla_host_t *, uint16_t);
static inline int
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325 changes: 309 additions & 16 deletions drivers/scsi/qla2xxx/qla_iocb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -468,29 +468,37 @@ qla2x00_start_scsi(srb_t *sp)
*
* Returns non-zero if a failure occured, else zero.
*/
int
int
__qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun,
uint8_t type)
{
mrk_entry_t *pkt;
mrk_entry_t *mrk;
struct mrk_entry_24xx *mrk24;

pkt = (mrk_entry_t *)qla2x00_req_pkt(ha);
if (pkt == NULL) {
DEBUG2_3(printk("%s(): **** FAILED ****\n", __func__));
mrk24 = NULL;
mrk = (mrk_entry_t *)qla2x00_req_pkt(ha);
if (mrk == NULL) {
DEBUG2_3(printk("%s(%ld): failed to allocate Marker IOCB.\n",
__func__, ha->host_no));

return (QLA_FUNCTION_FAILED);
}

pkt->entry_type = MARKER_TYPE;
pkt->modifier = type;

mrk->entry_type = MARKER_TYPE;
mrk->modifier = type;
if (type != MK_SYNC_ALL) {
pkt->lun = cpu_to_le16(lun);
SET_TARGET_ID(ha, pkt->target, loop_id);
if (IS_QLA24XX(ha) || IS_QLA25XX(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);
} else {
SET_TARGET_ID(ha, mrk->target, loop_id);
mrk->lun = cpu_to_le16(lun);
}
}
wmb();

/* Issue command to ISP */
qla2x00_isp_cmd(ha);

return (QLA_SUCCESS);
Expand Down Expand Up @@ -521,7 +529,7 @@ qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun,
static request_t *
qla2x00_req_pkt(scsi_qla_host_t *ha)
{
struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
device_reg_t __iomem *reg = ha->iobase;
request_t *pkt = NULL;
uint16_t cnt;
uint32_t *dword_ptr;
Expand All @@ -532,7 +540,12 @@ qla2x00_req_pkt(scsi_qla_host_t *ha)
for (timer = HZ; timer; timer--) {
if ((req_cnt + 2) >= ha->req_q_cnt) {
/* Calculate number of free request entries. */
cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
cnt = (uint16_t)RD_REG_DWORD(
&reg->isp24.req_q_out);
else
cnt = qla2x00_debounce_register(
ISP_REQ_Q_OUT(ha, &reg->isp));
if (ha->req_ring_index < cnt)
ha->req_q_cnt = cnt - ha->req_ring_index;
else
Expand Down Expand Up @@ -586,7 +599,7 @@ qla2x00_req_pkt(scsi_qla_host_t *ha)
void
qla2x00_isp_cmd(scsi_qla_host_t *ha)
{
struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
device_reg_t __iomem *reg = ha->iobase;

DEBUG5(printk("%s(): IOCB data:\n", __func__));
DEBUG5(qla2x00_dump_buffer(
Expand All @@ -601,6 +614,286 @@ qla2x00_isp_cmd(scsi_qla_host_t *ha)
ha->request_ring_ptr++;

/* Set chip new ring index. */
WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index);
RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
WRT_REG_DWORD(&reg->isp24.req_q_in, ha->req_ring_index);
RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
} else {
WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp), ha->req_ring_index);
RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
}

}

/**
* qla24xx_calc_iocbs() - 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.
*/
static inline uint16_t
qla24xx_calc_iocbs(uint16_t dsds)
{
uint16_t iocbs;

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

/**
* 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
*/
static 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 *ha;
struct scsi_cmnd *cmd;

cmd = sp->cmd;

/* 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 (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) {
cmd_pkt->byte_count = __constant_cpu_to_le32(0);
return;
}

ha = sp->ha;

/* Set transfer direction */
if (cmd->sc_data_direction == DMA_TO_DEVICE)
cmd_pkt->task_mgmt_flags =
__constant_cpu_to_le16(TMF_WRITE_DATA);
else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
cmd_pkt->task_mgmt_flags =
__constant_cpu_to_le16(TMF_READ_DATA);

/* 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 */
if (cmd->use_sg != 0) {
struct scatterlist *cur_seg;
struct scatterlist *end_seg;

cur_seg = (struct scatterlist *)cmd->request_buffer;
end_seg = cur_seg + tot_dsds;
while (cur_seg < end_seg) {
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(ha);
cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
avail_dsds = 5;
}

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));
avail_dsds--;

cur_seg++;
}
} else {
*cur_dsd++ = cpu_to_le32(LSD(sp->dma_handle));
*cur_dsd++ = cpu_to_le32(MSD(sp->dma_handle));
*cur_dsd++ = cpu_to_le32(cmd->request_bufflen);
}
}


/**
* qla24xx_start_scsi() - Send a SCSI command to the ISP
* @sp: command to send to the ISP
*
* Returns non-zero if a failure occured, else zero.
*/
int
qla24xx_start_scsi(srb_t *sp)
{
int ret;
unsigned long flags;
scsi_qla_host_t *ha;
struct scsi_cmnd *cmd;
uint32_t *clr_ptr;
uint32_t index;
uint32_t handle;
struct cmd_type_7 *cmd_pkt;
struct scatterlist *sg;
uint16_t cnt;
uint16_t req_cnt;
uint16_t tot_dsds;
struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
char tag[2];

/* Setup device pointers. */
ret = 0;
ha = sp->ha;
reg = &ha->iobase->isp24;
cmd = sp->cmd;
/* So we know we haven't pci_map'ed anything yet */
tot_dsds = 0;

/* Send marker if required */
if (ha->marker_needed != 0) {
if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
return QLA_FUNCTION_FAILED;
}
ha->marker_needed = 0;
}

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

/* Check for room in outstanding command list. */
handle = ha->current_outstanding_cmd;
for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
handle++;
if (handle == MAX_OUTSTANDING_COMMANDS)
handle = 1;
if (ha->outstanding_cmds[handle] == 0)
break;
}
if (index == MAX_OUTSTANDING_COMMANDS)
goto queuing_error;

/* Map the sg table so we have an accurate count of sg entries needed */
if (cmd->use_sg) {
sg = (struct scatterlist *) cmd->request_buffer;
tot_dsds = pci_map_sg(ha->pdev, sg, cmd->use_sg,
cmd->sc_data_direction);
if (tot_dsds == 0)
goto queuing_error;
} else if (cmd->request_bufflen) {
dma_addr_t req_dma;

req_dma = pci_map_single(ha->pdev, cmd->request_buffer,
cmd->request_bufflen, cmd->sc_data_direction);
if (dma_mapping_error(req_dma))
goto queuing_error;

sp->dma_handle = req_dma;
tot_dsds = 1;
}

req_cnt = qla24xx_calc_iocbs(tot_dsds);
if (ha->req_q_cnt < (req_cnt + 2)) {
cnt = (uint16_t)RD_REG_DWORD_RELAXED(&reg->req_q_out);
if (ha->req_ring_index < cnt)
ha->req_q_cnt = cnt - ha->req_ring_index;
else
ha->req_q_cnt = ha->request_q_length -
(ha->req_ring_index - cnt);
}
if (ha->req_q_cnt < (req_cnt + 2)) {
if (cmd->use_sg)
pci_unmap_sg(ha->pdev, sg, cmd->use_sg,
cmd->sc_data_direction);
goto queuing_error;
}

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

cmd_pkt = (struct cmd_type_7 *)ha->request_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 NPORT-ID and LUN number*/
cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;

cmd_pkt->lun[1] = LSB(sp->cmd->device->lun);
cmd_pkt->lun[2] = MSB(sp->cmd->device->lun);

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

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

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

/* 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;
wmb();

/* Adjust ring index. */
ha->req_ring_index++;
if (ha->req_ring_index == ha->request_q_length) {
ha->req_ring_index = 0;
ha->request_ring_ptr = ha->request_ring;
} else
ha->request_ring_ptr++;

sp->flags |= SRB_DMA_VALID;
sp->state = SRB_ACTIVE_STATE;

/* Set chip new ring index. */
WRT_REG_DWORD(&reg->req_q_in, ha->req_ring_index);
RD_REG_DWORD_RELAXED(&reg->req_q_in); /* PCI Posting. */

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

queuing_error:
if (cmd->use_sg && tot_dsds) {
sg = (struct scatterlist *) cmd->request_buffer;
pci_unmap_sg(ha->pdev, sg, cmd->use_sg,
cmd->sc_data_direction);
} else if (tot_dsds) {
pci_unmap_single(ha->pdev, sp->dma_handle,
cmd->request_bufflen, cmd->sc_data_direction);
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);

return QLA_FUNCTION_FAILED;
}

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