867 lines
22 KiB
C
867 lines
22 KiB
C
/*
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* QLogic Fibre Channel HBA Driver
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* Copyright (c) 2003-2005 QLogic Corporation
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*
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* See LICENSE.qla2xxx for copyright and licensing details.
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*/
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#include "qla_def.h"
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_tcq.h>
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static inline uint16_t qla2x00_get_cmd_direction(struct scsi_cmnd *cmd);
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static inline cont_entry_t *qla2x00_prep_cont_type0_iocb(scsi_qla_host_t *);
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static inline cont_a64_entry_t *qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *);
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static request_t *qla2x00_req_pkt(scsi_qla_host_t *ha);
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/**
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* qla2x00_get_cmd_direction() - Determine control_flag data direction.
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* @cmd: SCSI command
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*
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* Returns the proper CF_* direction based on CDB.
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*/
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static inline uint16_t
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qla2x00_get_cmd_direction(struct scsi_cmnd *cmd)
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{
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uint16_t cflags;
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cflags = 0;
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/* Set transfer direction */
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if (cmd->sc_data_direction == DMA_TO_DEVICE)
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cflags = CF_WRITE;
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else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
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cflags = CF_READ;
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return (cflags);
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}
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/**
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* qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and
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* Continuation Type 0 IOCBs to allocate.
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*
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* @dsds: number of data segment decriptors needed
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*
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* Returns the number of IOCB entries needed to store @dsds.
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*/
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uint16_t
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qla2x00_calc_iocbs_32(uint16_t dsds)
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{
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uint16_t iocbs;
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iocbs = 1;
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if (dsds > 3) {
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iocbs += (dsds - 3) / 7;
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if ((dsds - 3) % 7)
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iocbs++;
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}
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return (iocbs);
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}
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/**
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* qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and
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* Continuation Type 1 IOCBs to allocate.
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*
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* @dsds: number of data segment decriptors needed
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*
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* Returns the number of IOCB entries needed to store @dsds.
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*/
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uint16_t
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qla2x00_calc_iocbs_64(uint16_t dsds)
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{
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uint16_t iocbs;
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iocbs = 1;
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if (dsds > 2) {
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iocbs += (dsds - 2) / 5;
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if ((dsds - 2) % 5)
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iocbs++;
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}
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return (iocbs);
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}
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/**
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* qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB.
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* @ha: HA context
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*
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* Returns a pointer to the Continuation Type 0 IOCB packet.
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*/
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static inline cont_entry_t *
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qla2x00_prep_cont_type0_iocb(scsi_qla_host_t *ha)
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{
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cont_entry_t *cont_pkt;
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/* Adjust ring index. */
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ha->req_ring_index++;
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if (ha->req_ring_index == ha->request_q_length) {
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ha->req_ring_index = 0;
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ha->request_ring_ptr = ha->request_ring;
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} else {
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ha->request_ring_ptr++;
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}
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cont_pkt = (cont_entry_t *)ha->request_ring_ptr;
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/* Load packet defaults. */
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*((uint32_t *)(&cont_pkt->entry_type)) =
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__constant_cpu_to_le32(CONTINUE_TYPE);
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return (cont_pkt);
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}
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/**
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* qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB.
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* @ha: HA context
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*
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* Returns a pointer to the continuation type 1 IOCB packet.
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*/
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static inline cont_a64_entry_t *
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qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *ha)
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{
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cont_a64_entry_t *cont_pkt;
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/* Adjust ring index. */
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ha->req_ring_index++;
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if (ha->req_ring_index == ha->request_q_length) {
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ha->req_ring_index = 0;
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ha->request_ring_ptr = ha->request_ring;
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} else {
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ha->request_ring_ptr++;
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}
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cont_pkt = (cont_a64_entry_t *)ha->request_ring_ptr;
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/* Load packet defaults. */
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*((uint32_t *)(&cont_pkt->entry_type)) =
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__constant_cpu_to_le32(CONTINUE_A64_TYPE);
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return (cont_pkt);
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}
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/**
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* qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit
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* capable IOCB types.
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*
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* @sp: SRB command to process
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* @cmd_pkt: Command type 2 IOCB
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* @tot_dsds: Total number of segments to transfer
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*/
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void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt,
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uint16_t tot_dsds)
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{
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uint16_t avail_dsds;
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uint32_t *cur_dsd;
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scsi_qla_host_t *ha;
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struct scsi_cmnd *cmd;
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cmd = sp->cmd;
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/* Update entry type to indicate Command Type 2 IOCB */
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*((uint32_t *)(&cmd_pkt->entry_type)) =
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__constant_cpu_to_le32(COMMAND_TYPE);
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/* No data transfer */
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if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) {
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cmd_pkt->byte_count = __constant_cpu_to_le32(0);
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return;
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}
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ha = sp->ha;
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cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(cmd));
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/* Three DSDs are available in the Command Type 2 IOCB */
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avail_dsds = 3;
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cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
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/* Load data segments */
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if (cmd->use_sg != 0) {
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struct scatterlist *cur_seg;
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struct scatterlist *end_seg;
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cur_seg = (struct scatterlist *)cmd->request_buffer;
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end_seg = cur_seg + tot_dsds;
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while (cur_seg < end_seg) {
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cont_entry_t *cont_pkt;
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/* Allocate additional continuation packets? */
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if (avail_dsds == 0) {
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/*
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* Seven DSDs are available in the Continuation
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* Type 0 IOCB.
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*/
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cont_pkt = qla2x00_prep_cont_type0_iocb(ha);
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cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address;
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avail_dsds = 7;
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}
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*cur_dsd++ = cpu_to_le32(sg_dma_address(cur_seg));
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*cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));
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avail_dsds--;
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cur_seg++;
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}
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} else {
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*cur_dsd++ = cpu_to_le32(sp->dma_handle);
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*cur_dsd++ = cpu_to_le32(cmd->request_bufflen);
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}
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}
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/**
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* qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit
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* capable IOCB types.
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*
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* @sp: SRB command to process
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* @cmd_pkt: Command type 3 IOCB
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* @tot_dsds: Total number of segments to transfer
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*/
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void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt,
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uint16_t tot_dsds)
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{
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uint16_t avail_dsds;
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uint32_t *cur_dsd;
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scsi_qla_host_t *ha;
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struct scsi_cmnd *cmd;
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cmd = sp->cmd;
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/* Update entry type to indicate Command Type 3 IOCB */
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*((uint32_t *)(&cmd_pkt->entry_type)) =
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__constant_cpu_to_le32(COMMAND_A64_TYPE);
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/* No data transfer */
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if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) {
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cmd_pkt->byte_count = __constant_cpu_to_le32(0);
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return;
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}
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ha = sp->ha;
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cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(cmd));
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/* Two DSDs are available in the Command Type 3 IOCB */
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avail_dsds = 2;
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cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;
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/* Load data segments */
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if (cmd->use_sg != 0) {
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struct scatterlist *cur_seg;
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struct scatterlist *end_seg;
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cur_seg = (struct scatterlist *)cmd->request_buffer;
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end_seg = cur_seg + tot_dsds;
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while (cur_seg < end_seg) {
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dma_addr_t sle_dma;
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cont_a64_entry_t *cont_pkt;
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/* Allocate additional continuation packets? */
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if (avail_dsds == 0) {
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/*
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* Five DSDs are available in the Continuation
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* Type 1 IOCB.
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*/
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cont_pkt = qla2x00_prep_cont_type1_iocb(ha);
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cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
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avail_dsds = 5;
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}
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sle_dma = sg_dma_address(cur_seg);
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*cur_dsd++ = cpu_to_le32(LSD(sle_dma));
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*cur_dsd++ = cpu_to_le32(MSD(sle_dma));
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*cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));
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avail_dsds--;
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cur_seg++;
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}
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} else {
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*cur_dsd++ = cpu_to_le32(LSD(sp->dma_handle));
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*cur_dsd++ = cpu_to_le32(MSD(sp->dma_handle));
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*cur_dsd++ = cpu_to_le32(cmd->request_bufflen);
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}
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}
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/**
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* qla2x00_start_scsi() - Send a SCSI command to the ISP
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* @sp: command to send to the ISP
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*
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* Returns non-zero if a failure occured, else zero.
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*/
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int
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qla2x00_start_scsi(srb_t *sp)
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{
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int ret;
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unsigned long flags;
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scsi_qla_host_t *ha;
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struct scsi_cmnd *cmd;
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uint32_t *clr_ptr;
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uint32_t index;
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uint32_t handle;
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cmd_entry_t *cmd_pkt;
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struct scatterlist *sg;
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uint16_t cnt;
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uint16_t req_cnt;
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uint16_t tot_dsds;
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struct device_reg_2xxx __iomem *reg;
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/* Setup device pointers. */
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ret = 0;
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ha = sp->ha;
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reg = &ha->iobase->isp;
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cmd = sp->cmd;
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/* So we know we haven't pci_map'ed anything yet */
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tot_dsds = 0;
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/* Send marker if required */
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if (ha->marker_needed != 0) {
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if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
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return (QLA_FUNCTION_FAILED);
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}
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ha->marker_needed = 0;
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}
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/* Acquire ring specific lock */
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spin_lock_irqsave(&ha->hardware_lock, flags);
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/* Check for room in outstanding command list. */
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handle = ha->current_outstanding_cmd;
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for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
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handle++;
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if (handle == MAX_OUTSTANDING_COMMANDS)
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handle = 1;
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if (ha->outstanding_cmds[handle] == 0)
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break;
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}
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if (index == MAX_OUTSTANDING_COMMANDS)
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goto queuing_error;
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/* Map the sg table so we have an accurate count of sg entries needed */
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if (cmd->use_sg) {
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sg = (struct scatterlist *) cmd->request_buffer;
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tot_dsds = pci_map_sg(ha->pdev, sg, cmd->use_sg,
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cmd->sc_data_direction);
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if (tot_dsds == 0)
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goto queuing_error;
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} else if (cmd->request_bufflen) {
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dma_addr_t req_dma;
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req_dma = pci_map_single(ha->pdev, cmd->request_buffer,
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cmd->request_bufflen, cmd->sc_data_direction);
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if (dma_mapping_error(req_dma))
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goto queuing_error;
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sp->dma_handle = req_dma;
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tot_dsds = 1;
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}
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/* Calculate the number of request entries needed. */
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req_cnt = ha->isp_ops.calc_req_entries(tot_dsds);
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if (ha->req_q_cnt < (req_cnt + 2)) {
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cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg));
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if (ha->req_ring_index < cnt)
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ha->req_q_cnt = cnt - ha->req_ring_index;
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else
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ha->req_q_cnt = ha->request_q_length -
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(ha->req_ring_index - cnt);
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}
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if (ha->req_q_cnt < (req_cnt + 2))
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goto queuing_error;
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/* Build command packet */
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ha->current_outstanding_cmd = handle;
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ha->outstanding_cmds[handle] = sp;
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sp->ha = ha;
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sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle;
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ha->req_q_cnt -= req_cnt;
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cmd_pkt = (cmd_entry_t *)ha->request_ring_ptr;
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cmd_pkt->handle = handle;
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/* Zero out remaining portion of packet. */
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clr_ptr = (uint32_t *)cmd_pkt + 2;
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memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
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cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
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/* Set target ID and LUN number*/
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SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id);
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cmd_pkt->lun = cpu_to_le16(sp->cmd->device->lun);
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/* Update tagged queuing modifier */
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cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG);
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/* Load SCSI command packet. */
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memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len);
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cmd_pkt->byte_count = cpu_to_le32((uint32_t)cmd->request_bufflen);
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/* Build IOCB segments */
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ha->isp_ops.build_iocbs(sp, cmd_pkt, tot_dsds);
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/* Set total data segment count. */
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cmd_pkt->entry_count = (uint8_t)req_cnt;
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wmb();
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/* Adjust ring index. */
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ha->req_ring_index++;
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if (ha->req_ring_index == ha->request_q_length) {
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ha->req_ring_index = 0;
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ha->request_ring_ptr = ha->request_ring;
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} else
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ha->request_ring_ptr++;
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sp->flags |= SRB_DMA_VALID;
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sp->state = SRB_ACTIVE_STATE;
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/* Set chip new ring index. */
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WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index);
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RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */
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/* Manage unprocessed RIO/ZIO commands in response queue. */
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if (ha->flags.process_response_queue &&
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ha->response_ring_ptr->signature != RESPONSE_PROCESSED)
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qla2x00_process_response_queue(ha);
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spin_unlock_irqrestore(&ha->hardware_lock, flags);
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return (QLA_SUCCESS);
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queuing_error:
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if (cmd->use_sg && tot_dsds) {
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sg = (struct scatterlist *) cmd->request_buffer;
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pci_unmap_sg(ha->pdev, sg, cmd->use_sg,
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cmd->sc_data_direction);
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} else if (tot_dsds) {
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pci_unmap_single(ha->pdev, sp->dma_handle,
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cmd->request_bufflen, cmd->sc_data_direction);
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}
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spin_unlock_irqrestore(&ha->hardware_lock, flags);
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return (QLA_FUNCTION_FAILED);
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}
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/**
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* qla2x00_marker() - Send a marker IOCB to the firmware.
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* @ha: HA context
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* @loop_id: loop ID
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* @lun: LUN
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* @type: marker modifier
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*
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* Can be called from both normal and interrupt context.
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*
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* Returns non-zero if a failure occured, else zero.
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*/
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int
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__qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun,
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uint8_t type)
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{
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mrk_entry_t *mrk;
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struct mrk_entry_24xx *mrk24;
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mrk24 = NULL;
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mrk = (mrk_entry_t *)qla2x00_req_pkt(ha);
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if (mrk == NULL) {
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DEBUG2_3(printk("%s(%ld): failed to allocate Marker IOCB.\n",
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__func__, ha->host_no));
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return (QLA_FUNCTION_FAILED);
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}
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mrk->entry_type = MARKER_TYPE;
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mrk->modifier = type;
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if (type != MK_SYNC_ALL) {
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if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
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mrk24 = (struct mrk_entry_24xx *) mrk;
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mrk24->nport_handle = cpu_to_le16(loop_id);
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mrk24->lun[1] = LSB(lun);
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mrk24->lun[2] = MSB(lun);
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} else {
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SET_TARGET_ID(ha, mrk->target, loop_id);
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mrk->lun = cpu_to_le16(lun);
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}
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}
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wmb();
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qla2x00_isp_cmd(ha);
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return (QLA_SUCCESS);
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}
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int
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qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun,
|
|
uint8_t type)
|
|
{
|
|
int ret;
|
|
unsigned long flags = 0;
|
|
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
ret = __qla2x00_marker(ha, loop_id, lun, type);
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/**
|
|
* qla2x00_req_pkt() - Retrieve a request packet from the request ring.
|
|
* @ha: HA context
|
|
*
|
|
* Note: The caller must hold the hardware lock before calling this routine.
|
|
*
|
|
* Returns NULL if function failed, else, a pointer to the request packet.
|
|
*/
|
|
static request_t *
|
|
qla2x00_req_pkt(scsi_qla_host_t *ha)
|
|
{
|
|
device_reg_t __iomem *reg = ha->iobase;
|
|
request_t *pkt = NULL;
|
|
uint16_t cnt;
|
|
uint32_t *dword_ptr;
|
|
uint32_t timer;
|
|
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. */
|
|
if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
|
|
cnt = (uint16_t)RD_REG_DWORD(
|
|
®->isp24.req_q_out);
|
|
else
|
|
cnt = qla2x00_debounce_register(
|
|
ISP_REQ_Q_OUT(ha, ®->isp));
|
|
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 room for request in request ring. */
|
|
if ((req_cnt + 2) < ha->req_q_cnt) {
|
|
ha->req_q_cnt--;
|
|
pkt = ha->request_ring_ptr;
|
|
|
|
/* Zero out packet. */
|
|
dword_ptr = (uint32_t *)pkt;
|
|
for (cnt = 0; cnt < REQUEST_ENTRY_SIZE / 4; cnt++)
|
|
*dword_ptr++ = 0;
|
|
|
|
/* Set system defined field. */
|
|
pkt->sys_define = (uint8_t)ha->req_ring_index;
|
|
|
|
/* Set entry count. */
|
|
pkt->entry_count = 1;
|
|
|
|
break;
|
|
}
|
|
|
|
/* Release ring specific lock */
|
|
spin_unlock(&ha->hardware_lock);
|
|
|
|
udelay(2); /* 2 us */
|
|
|
|
/* Check for pending interrupts. */
|
|
/* During init we issue marker directly */
|
|
if (!ha->marker_needed)
|
|
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
|
|
*
|
|
* Note: The caller must hold the hardware lock before calling this routine.
|
|
*/
|
|
void
|
|
qla2x00_isp_cmd(scsi_qla_host_t *ha)
|
|
{
|
|
device_reg_t __iomem *reg = ha->iobase;
|
|
|
|
DEBUG5(printk("%s(): IOCB data:\n", __func__));
|
|
DEBUG5(qla2x00_dump_buffer(
|
|
(uint8_t *)ha->request_ring_ptr, REQUEST_ENTRY_SIZE));
|
|
|
|
/* 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++;
|
|
|
|
/* Set chip new ring index. */
|
|
if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
|
|
WRT_REG_DWORD(®->isp24.req_q_in, ha->req_ring_index);
|
|
RD_REG_DWORD_RELAXED(®->isp24.req_q_in);
|
|
} else {
|
|
WRT_REG_WORD(ISP_REQ_Q_IN(ha, ®->isp), ha->req_ring_index);
|
|
RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, ®->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;
|
|
|
|
/* 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);
|
|
|
|
/* 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;
|
|
}
|