static struct sas_task *sas_create_task(struct scsi_cmnd *cmd,
struct domain_device *dev,
gfp_t gfp_flags)
{
struct sas_task *task = sas_alloc_task(gfp_flags);
struct scsi_lun lun;
if (!task)
return NULL;
task->uldd_task = cmd;
ASSIGN_SAS_TASK(cmd, task);
task->dev = dev;
task->task_proto = task->dev->tproto; /* BUG_ON(!SSP) */
task->ssp_task.retry_count = 1;
int_to_scsilun(cmd->device->lun, &lun);
memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8);
task->ssp_task.task_attr = TASK_ATTR_SIMPLE;
memcpy(task->ssp_task.cdb, cmd->cmnd, 16);
task->scatter = scsi_sglist(cmd);
task->num_scatter = scsi_sg_count(cmd);
task->total_xfer_len = scsi_bufflen(cmd);
task->data_dir = cmd->sc_data_direction;
task->task_done = sas_scsi_task_done;
return task;
}
/**
* qla4xxx_send_marker_iocb - issues marker iocb to HBA
* @ha: Pointer to host adapter structure.
* @ddb_entry: Pointer to device database entry
* @lun: SCSI LUN
* @marker_type: marker identifier
*
* This routine issues a marker IOCB.
**/
int qla4xxx_send_marker_iocb(struct scsi_qla_host *ha,
struct ddb_entry *ddb_entry, int lun, uint16_t mrkr_mod)
{
struct qla4_marker_entry *marker_entry;
unsigned long flags = 0;
uint8_t status = QLA_SUCCESS;
/* Acquire hardware specific lock */
spin_lock_irqsave(&ha->hardware_lock, flags);
/* Get pointer to the queue entry for the marker */
if (qla4xxx_get_req_pkt(ha, (struct queue_entry **) &marker_entry) !=
QLA_SUCCESS) {
status = QLA_ERROR;
goto exit_send_marker;
}
/* Put the marker in the request queue */
marker_entry->hdr.entryType = ET_MARKER;
marker_entry->hdr.entryCount = 1;
marker_entry->target = cpu_to_le16(ddb_entry->fw_ddb_index);
marker_entry->modifier = cpu_to_le16(mrkr_mod);
int_to_scsilun(lun, &marker_entry->lun);
wmb();
/* Tell ISP it's got a new I/O request */
ha->isp_ops->queue_iocb(ha);
exit_send_marker:
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return status;
}
/**
* qla4xxx_send_command_to_isp - issues command to HBA
* @ha: pointer to host adapter structure.
* @srb: pointer to SCSI Request Block to be sent to ISP
*
* This routine is called by qla4xxx_queuecommand to build an ISP
* command and pass it to the ISP for execution.
**/
int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb)
{
struct scsi_cmnd *cmd = srb->cmd;
struct ddb_entry *ddb_entry;
struct command_t3_entry *cmd_entry;
struct scatterlist *sg = NULL;
uint16_t tot_dsds;
uint16_t req_cnt;
unsigned long flags;
uint16_t cnt;
uint32_t index;
char tag[2];
/* Get real lun and adapter */
ddb_entry = srb->ddb;
/* Send marker(s) if needed. */
if (ha->marker_needed == 1) {
if (qla4xxx_send_marker_iocb(ha, ddb_entry,
cmd->device->lun) != QLA_SUCCESS)
return QLA_ERROR;
ha->marker_needed = 0;
}
tot_dsds = 0;
/* Acquire hardware specific lock */
spin_lock_irqsave(&ha->hardware_lock, flags);
index = (uint32_t)cmd->request->tag;
/* Calculate the number of request 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;
srb->dma_handle = req_dma;
tot_dsds = 1;
}
req_cnt = qla4xxx_calc_request_entries(tot_dsds);
if (ha->req_q_count < (req_cnt + 2)) {
cnt = (uint16_t) le32_to_cpu(ha->shadow_regs->req_q_out);
if (ha->request_in < cnt)
ha->req_q_count = cnt - ha->request_in;
else
ha->req_q_count = REQUEST_QUEUE_DEPTH -
(ha->request_in - cnt);
}
if (ha->req_q_count < (req_cnt + 2))
goto queuing_error;
/* total iocbs active */
if ((ha->iocb_cnt + req_cnt) >= REQUEST_QUEUE_DEPTH)
goto queuing_error;
/* Build command packet */
cmd_entry = (struct command_t3_entry *) ha->request_ptr;
memset(cmd_entry, 0, sizeof(struct command_t3_entry));
cmd_entry->hdr.entryType = ET_COMMAND;
cmd_entry->handle = cpu_to_le32(index);
cmd_entry->target = cpu_to_le16(ddb_entry->fw_ddb_index);
cmd_entry->connection_id = cpu_to_le16(ddb_entry->connection_id);
int_to_scsilun(cmd->device->lun, &cmd_entry->lun);
cmd_entry->cmdSeqNum = cpu_to_le32(ddb_entry->CmdSn);
cmd_entry->ttlByteCnt = cpu_to_le32(cmd->request_bufflen);
memcpy(cmd_entry->cdb, cmd->cmnd, cmd->cmd_len);
cmd_entry->dataSegCnt = cpu_to_le16(tot_dsds);
cmd_entry->hdr.entryCount = req_cnt;
/* Set data transfer direction control flags
* NOTE: Look at data_direction bits iff there is data to be
* transferred, as the data direction bit is sometimed filled
* in when there is no data to be transferred */
cmd_entry->control_flags = CF_NO_DATA;
if (cmd->request_bufflen) {
if (cmd->sc_data_direction == DMA_TO_DEVICE)
cmd_entry->control_flags = CF_WRITE;
else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
cmd_entry->control_flags = CF_READ;
ha->bytes_xfered += cmd->request_bufflen;
if (ha->bytes_xfered & ~0xFFFFF){
ha->total_mbytes_xferred += ha->bytes_xfered >> 20;
ha->bytes_xfered &= 0xFFFFF;
}
}
/**
* 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;
/* 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(®->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))
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. */
/* 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;
int_to_scsilun(sp->cmd->device->lun, &cmd_pkt->lun);
host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
/* 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(®->req_q_in, ha->req_ring_index);
RD_REG_DWORD_RELAXED(®->req_q_in); /* PCI Posting. */
/* Manage unprocessed RIO/ZIO commands in response queue. */
if (ha->flags.process_response_queue &&
ha->response_ring_ptr->signature != RESPONSE_PROCESSED)
qla24xx_process_response_queue(ha);
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;
}