*
******************************************************************************/
-#include "qla_os.h"
#include "qla_def.h"
+#include <linux/blkdev.h>
+#include <linux/delay.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 *);
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);
}
uint32_t *clr_ptr;
uint32_t index;
uint32_t handle;
- uint16_t cnt;
cmd_entry_t *cmd_pkt;
uint32_t timeout;
struct scatterlist *sg;
-
+ uint16_t cnt;
+ uint16_t req_cnt;
+ uint16_t tot_dsds;
device_reg_t *reg;
/* Setup device pointers. */
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_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 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);
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++;
pkt->lun = cpu_to_le16(lun);
SET_TARGET_ID(ha, pkt->target, loop_id);
}
+ wmb();
/* Issue command to ISP */
qla2x00_isp_cmd(ha);
git://git.onelab.eu / linux-2.6.git / blobdiff