*
******************************************************************************/
-#include "qla_os.h"
#include "qla_def.h"
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+
+#include <scsi/scsi_tcq.h>
+
static inline uint16_t qla2x00_get_cmd_direction(struct scsi_cmnd *cmd);
static inline cont_entry_t *qla2x00_prep_cont_type0_iocb(scsi_qla_host_t *);
static inline cont_a64_entry_t *qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *);
+static request_t *qla2x00_req_pkt(scsi_qla_host_t *ha);
/**
* qla2x00_get_cmd_direction() - Determine control_flag data direction.
cflags = CF_WRITE;
else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
cflags = CF_READ;
- else {
- switch (cmd->data_cmnd[0]) {
- case WRITE_6:
- case WRITE_10:
- case WRITE_12:
- case WRITE_BUFFER:
- case WRITE_LONG:
- case WRITE_SAME:
- case WRITE_VERIFY:
- case WRITE_VERIFY_12:
- case FORMAT_UNIT:
- case SEND_VOLUME_TAG:
- case MODE_SELECT:
- case SEND_DIAGNOSTIC:
- case MODE_SELECT_10:
- cflags = CF_WRITE;
- break;
- default:
- cflags = CF_READ;
- break;
- }
- }
return (cflags);
}
/* Adjust ring index. */
ha->req_ring_index++;
- if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
+ if (ha->req_ring_index == ha->request_q_length) {
ha->req_ring_index = 0;
ha->request_ring_ptr = ha->request_ring;
} else {
/* Adjust ring index. */
ha->req_ring_index++;
- if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
+ if (ha->req_ring_index == ha->request_q_length) {
ha->req_ring_index = 0;
ha->request_ring_ptr = ha->request_ring;
} else {
uint32_t *clr_ptr;
uint32_t index;
uint32_t handle;
- uint16_t cnt;
cmd_entry_t *cmd_pkt;
uint32_t timeout;
struct scatterlist *sg;
-
- device_reg_t *reg;
+ uint16_t cnt;
+ uint16_t req_cnt;
+ uint16_t tot_dsds;
+ device_reg_t __iomem *reg;
+ char tag[2];
/* Setup device pointers. */
ret = 0;
fclun = sp->lun_queue->fclun;
ha = fclun->fcport->ha;
- cmd = sp->cmd;
reg = ha->iobase;
+ cmd = sp->cmd;
/* Send marker if required */
if (ha->marker_needed != 0) {
ha->marker_needed = 0;
}
- /* Calculate number of segments and entries required. */
- if (sp->req_cnt == 0) {
- sp->tot_dsds = 0;
- if (cmd->use_sg) {
- sg = (struct scatterlist *) cmd->request_buffer;
- sp->tot_dsds = pci_map_sg(ha->pdev, sg, cmd->use_sg,
- cmd->sc_data_direction);
- } else if (cmd->request_bufflen) {
- sp->tot_dsds++;
- }
- sp->req_cnt = (ha->calc_request_entries)(sp->tot_dsds);
- }
-
/* Acquire ring specific lock */
spin_lock_irqsave(&ha->hardware_lock, flags);
- if (ha->req_q_cnt < (sp->req_cnt + 2)) {
- /* Calculate number of free request entries */
- cnt = RD_REG_WORD(ISP_REQ_Q_OUT(ha, reg));
- if (ha->req_ring_index < cnt)
- ha->req_q_cnt = cnt - ha->req_ring_index;
- else
- ha->req_q_cnt = REQUEST_ENTRY_CNT -
- (ha->req_ring_index - cnt);
- }
-
- /* If no room for request in request ring */
- if (ha->req_q_cnt < (sp->req_cnt + 2)) {
- DEBUG5(printk("scsi(%ld): in-ptr=%x req_q_cnt=%x "
- "tot_dsds=%x.\n",
- ha->host_no, ha->req_ring_index, ha->req_q_cnt,
- sp->tot_dsds));
-
- goto queuing_error;
- }
-
/* 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) {
- ha->current_outstanding_cmd = handle;
+ if (ha->outstanding_cmds[handle] == 0)
break;
- }
}
- if (index == MAX_OUTSTANDING_COMMANDS) {
- DEBUG5(printk("scsi(%ld): Unable to queue command -- NO ROOM "
- "IN OUTSTANDING ARRAY (req_q_cnt=%x).\n",
- ha->host_no, ha->req_q_cnt));
+ if (index == MAX_OUTSTANDING_COMMANDS)
+ goto queuing_error;
+
+ /* Calculate the number of request entries needed. */
+ req_cnt = (ha->calc_request_entries)(cmd->request->nr_hw_segments);
+ if (ha->req_q_cnt < (req_cnt + 2)) {
+ cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg));
+ 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;
+
+ /* Finally, we have enough space, now perform mappings. */
+ tot_dsds = 0;
+ 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) {
+ tot_dsds++;
}
+ req_cnt = (ha->calc_request_entries)(tot_dsds);
/* 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 -= sp->req_cnt;
+ ha->req_q_cnt -= req_cnt;
cmd_pkt = (cmd_entry_t *)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(sp->tot_dsds);
+ cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
/* Set target ID */
SET_TARGET_ID(ha, cmd_pkt->target, fclun->fcport->loop_id);
/* Update tagged queuing modifier */
cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG);
- if (cmd->device->tagged_supported) {
- switch (cmd->tag) {
- case HEAD_OF_QUEUE_TAG:
+ if (scsi_populate_tag_msg(cmd, tag)) {
+ switch (tag[0]) {
+ case MSG_HEAD_TAG:
cmd_pkt->control_flags =
__constant_cpu_to_le16(CF_HEAD_TAG);
break;
- case ORDERED_QUEUE_TAG:
+ case MSG_ORDERED_TAG:
cmd_pkt->control_flags =
__constant_cpu_to_le16(CF_ORDERED_TAG);
break;
cmd_pkt->byte_count = cpu_to_le32((uint32_t)cmd->request_bufflen);
/* Build IOCB segments */
- (ha->build_scsi_iocbs)(sp, cmd_pkt, sp->tot_dsds);
+ (ha->build_scsi_iocbs)(sp, cmd_pkt, tot_dsds);
/* Set total data segment count. */
- cmd_pkt->entry_count = (uint8_t)sp->req_cnt;
+ cmd_pkt->entry_count = (uint8_t)req_cnt;
+ wmb();
/* Adjust ring index. */
ha->req_ring_index++;
- if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
+ if (ha->req_ring_index == ha->request_q_length) {
ha->req_ring_index = 0;
ha->request_ring_ptr = ha->request_ring;
} else
/* Set chip new ring index. */
WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index);
- RD_REG_WORD(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
+ RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return (QLA_SUCCESS);
pkt->lun = cpu_to_le16(lun);
SET_TARGET_ID(ha, pkt->target, loop_id);
}
+ wmb();
/* Issue command to ISP */
qla2x00_isp_cmd(ha);
*
* Returns NULL if function failed, else, a pointer to the request packet.
*/
-request_t *
+static request_t *
qla2x00_req_pkt(scsi_qla_host_t *ha)
{
- device_reg_t *reg = ha->iobase;
+ device_reg_t __iomem *reg = ha->iobase;
request_t *pkt = NULL;
uint16_t cnt;
uint32_t *dword_ptr;
if (ha->req_ring_index < cnt)
ha->req_q_cnt = cnt - ha->req_ring_index;
else
- ha->req_q_cnt = REQUEST_ENTRY_CNT -
+ ha->req_q_cnt = ha->request_q_length -
(ha->req_ring_index - cnt);
}
/* If room for request in request ring. */
return (pkt);
}
-/**
- * qla2x00_ms_req_pkt() - Retrieve a Management Server request packet from
- * the request ring.
- * @ha: HA context
- * @sp: pointer to handle post function call
- *
- * Note: The caller must hold the hardware lock before calling this routine.
- *
- * Returns NULL if function failed, else, a pointer to the request packet.
- */
-request_t *
-qla2x00_ms_req_pkt(scsi_qla_host_t *ha, srb_t *sp)
-{
- device_reg_t *reg = ha->iobase;
- request_t *pkt = NULL;
- uint16_t cnt, i, index;
- uint32_t *dword_ptr;
- uint32_t timer;
- uint8_t found = 0;
- uint16_t req_cnt = 1;
-
- /* Wait 1 second for slot. */
- 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 (ha->req_ring_index < cnt) {
- ha->req_q_cnt = cnt - ha->req_ring_index;
- } else {
- ha->req_q_cnt = REQUEST_ENTRY_CNT -
- (ha->req_ring_index - cnt);
- }
- }
-
- /* Check for room in outstanding command list. */
- cnt = ha->current_outstanding_cmd;
- for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
- cnt++;
- if (cnt == MAX_OUTSTANDING_COMMANDS)
- cnt = 1;
-
- if (ha->outstanding_cmds[cnt] == 0) {
- found = 1;
- ha->current_outstanding_cmd = cnt;
- break;
- }
- }
-
- /* If room for request in request ring. */
- if (found && (req_cnt + 2) < ha->req_q_cnt) {
- pkt = ha->request_ring_ptr;
-
- /* Zero out packet. */
- dword_ptr = (uint32_t *)pkt;
- for (i = 0; i < REQUEST_ENTRY_SIZE / 4; i++ )
- *dword_ptr++ = 0;
-
- DEBUG5(printk("%s(): putting sp=%p in "
- "outstanding_cmds[%x]\n",
- __func__,
- sp, cnt));
-
- ha->outstanding_cmds[cnt] = sp;
-
- /* save the handle */
- sp->cmd->host_scribble = (unsigned char *) (u_long) cnt;
- CMD_SP(sp->cmd) = (void *)sp;
-
- ha->req_q_cnt--;
- pkt->handle = (uint32_t)cnt;
-
- /* Set system defined field. */
- pkt->sys_define = (uint8_t)ha->req_ring_index;
- pkt->entry_status = 0;
-
- break;
- }
-
- /* Release ring specific lock */
- spin_unlock(&ha->hardware_lock);
- udelay(20);
-
- /* Check for pending interrupts. */
- qla2x00_poll(ha);
-
- spin_lock_irq(&ha->hardware_lock);
- }
- if (!pkt) {
- DEBUG2_3(printk("%s(): **** FAILED ****\n", __func__));
- }
-
- return (pkt);
-}
-
/**
* qla2x00_isp_cmd() - Modify the request ring pointer.
* @ha: HA context
void
qla2x00_isp_cmd(scsi_qla_host_t *ha)
{
- device_reg_t *reg = ha->iobase;
+ device_reg_t __iomem *reg = ha->iobase;
DEBUG5(printk("%s(): IOCB data:\n", __func__));
DEBUG5(qla2x00_dump_buffer(
/* Adjust ring index. */
ha->req_ring_index++;
- if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
+ if (ha->req_ring_index == ha->request_q_length) {
ha->req_ring_index = 0;
ha->request_ring_ptr = ha->request_ring;
} else
/* Set chip new ring index. */
WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index);
- RD_REG_WORD(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
+ RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
}
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