text: /*
   * QLogic Fibre Channel HBA Driver
   * Copyright (c)  2003-2014 QLogic Corporation
   *
   * See LICENSE.qla2xxx for copyright and licensing details.
   */
  
  #include "qla_target.h"
  /**
   * 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(scsi_qla_host_t *vha, uint16_t dsds)
  {
  	uint16_t iocbs;
  
  	iocbs = 1;
  	if (dsds > 1) {
  		iocbs += (dsds - 1) / 5;
  		if ((dsds - 1) % 5)
  			iocbs++;
  	}
  	return iocbs;
  }
  
  /*
   * qla2x00_debounce_register
   *      Debounce register.
   *
   * Input:
   *      port = register address.
   *
   * Returns:
   *      register value.
   */
  static __inline__ uint16_t
  qla2x00_debounce_register(volatile uint16_t __iomem *addr)
  {
  	volatile uint16_t first;
  	volatile uint16_t second;
  
  	do {
  		first = RD_REG_WORD(addr);
  		barrier();
  		cpu_relax();
  		second = RD_REG_WORD(addr);
  	} while (first != second);
  
  	return (first);
  }
  
  static inline void
  qla2x00_poll(struct rsp_que *rsp)
  {
  	unsigned long flags;
  	struct qla_hw_data *ha = rsp->hw;
  	local_irq_save(flags);
  	if (IS_P3P_TYPE(ha))
  		qla82xx_poll(0, rsp);
  	else
  		ha->isp_ops->intr_handler(0, rsp);
  	local_irq_restore(flags);
  }
  
  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 void
  host_to_adap(uint8_t *src, uint8_t *dst, uint32_t bsize)
  {
  	uint32_t *isrc = (uint32_t *) src;
  	__le32 *odest = (__le32 *) dst;
  	uint32_t iter = bsize >> 2;
  
  	for ( ; iter--; isrc++)
  		*odest++ = cpu_to_le32(*isrc);
  }
  
  static inline void
  qla2x00_set_reserved_loop_ids(struct qla_hw_data *ha)
  {
  	int i;
  
  	if (IS_FWI2_CAPABLE(ha))
  		return;
  
  	for (i = 0; i < SNS_FIRST_LOOP_ID; i++)
  		set_bit(i, ha->loop_id_map);
  	set_bit(MANAGEMENT_SERVER, ha->loop_id_map);
  	set_bit(BROADCAST, ha->loop_id_map);
  }
  
  static inline int
  qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id)
  {
  	struct qla_hw_data *ha = vha->hw;
  	if (IS_FWI2_CAPABLE(ha))
  		return (loop_id > NPH_LAST_HANDLE);
  
  	return ((loop_id > ha->max_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
  	    loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
  }
  
  static inline void
  qla2x00_clear_loop_id(fc_port_t *fcport) {
  	struct qla_hw_data *ha = fcport->vha->hw;
  
  	if (fcport->loop_id == FC_NO_LOOP_ID ||
  	    qla2x00_is_reserved_id(fcport->vha, fcport->loop_id))
  		return;
  
  	clear_bit(fcport->loop_id, ha->loop_id_map);
  	fcport->loop_id = FC_NO_LOOP_ID;
  }
  
  static inline void
  qla2x00_clean_dsd_pool(struct qla_hw_data *ha, srb_t *sp,
  	struct qla_tgt_cmd *tc)
  {
  	struct dsd_dma *dsd_ptr, *tdsd_ptr;
  	struct crc_context *ctx;
  
  	if (sp)
  		ctx = (struct crc_context *)GET_CMD_CTX_SP(sp);
  	else if (tc)
  		ctx = (struct crc_context *)tc->ctx;
  	else {
  		BUG();
  		return;
  	}
  
  	/* clean up allocated prev pool */
  	list_for_each_entry_safe(dsd_ptr, tdsd_ptr,
  	    &ctx->dsd_list, list) {
  		dma_pool_free(ha->dl_dma_pool, dsd_ptr->dsd_addr,
  		    dsd_ptr->dsd_list_dma);
  		list_del(&dsd_ptr->list);
  		kfree(dsd_ptr);
  	}
  	INIT_LIST_HEAD(&ctx->dsd_list);
  }
  
  static inline void
  qla2x00_set_fcport_state(fc_port_t *fcport, int state)
  {
  	int old_state;
  
  	old_state = atomic_read(&fcport->state);
  	atomic_set(&fcport->state, state);
  
  	/* Don't print state transitions during initial allocation of fcport */
  	if (old_state && old_state != state) {
  		ql_dbg(ql_dbg_disc, fcport->vha, 0x207d,
  		    "FCPort %8phC state transitioned from %s to %s - "
  			"portid=%02x%02x%02x.\n", fcport->port_name,
  		    port_state_str[old_state], port_state_str[state],
  		    fcport->d_id.b.domain, fcport->d_id.b.area,
  		    fcport->d_id.b.al_pa);
  	}
  }
  
  static inline int
  qla2x00_hba_err_chk_enabled(srb_t *sp)
  {
  	/*
  	 * Uncomment when corresponding SCSI changes are done.
  	 *
  	if (!sp->cmd->prot_chk)
  		return 0;
  	 *
  	 */
  	switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
  	case SCSI_PROT_READ_STRIP:
  	case SCSI_PROT_WRITE_INSERT:
  		if (ql2xenablehba_err_chk >= 1)
  			return 1;
  		break;
  	case SCSI_PROT_READ_PASS:
  	case SCSI_PROT_WRITE_PASS:
  		if (ql2xenablehba_err_chk >= 2)
  			return 1;
  		break;
  	case SCSI_PROT_READ_INSERT:
  	case SCSI_PROT_WRITE_STRIP:
  		return 1;
  	}
  	return 0;
  }
  
  static inline int
  qla2x00_reset_active(scsi_qla_host_t *vha)
  {
  	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
  
  	/* Test appropriate base-vha and vha flags. */
  	return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
  	    test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
  	    test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
  	    test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
  	    test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
  }
  
  static inline srb_t *
  qla2xxx_get_qpair_sp(struct qla_qpair *qpair, fc_port_t *fcport, gfp_t flag)
  {
  	srb_t *sp = NULL;
  	uint8_t bail;
  
  	QLA_QPAIR_MARK_BUSY(qpair, bail);
  	if (unlikely(bail))
  		return NULL;
  
  	sp = mempool_alloc(qpair->srb_mempool, flag);
  	if (!sp)
  		goto done;
  
  	memset(sp, 0, sizeof(*sp));
  	sp->fcport = fcport;
  	sp->iocbs = 1;
  	sp->vha = qpair->vha;
  done:
  	if (!sp)
  		QLA_QPAIR_MARK_NOT_BUSY(qpair);
  	return sp;
  }
  
  static inline void
  qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
  {
  	mempool_free(sp, qpair->srb_mempool);
  	QLA_QPAIR_MARK_NOT_BUSY(qpair);
  }
  
  static inline srb_t *
  qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
  {
  	srb_t *sp = NULL;
  	uint8_t bail;
  
  	QLA_VHA_MARK_BUSY(vha, bail);
  	if (unlikely(bail))
  		return NULL;
  
  	sp = mempool_alloc(vha->hw->srb_mempool, flag);
  	if (!sp)
  		goto done;
  
  	memset(sp, 0, sizeof(*sp));
  	sp->fcport = fcport;
  	sp->iocbs = 1;
  	sp->vha = vha;
  done:
  	if (!sp)
  		QLA_VHA_MARK_NOT_BUSY(vha);
  	return sp;
  }
  
  static inline void
  qla2x00_rel_sp(srb_t *sp)
  {
  	QLA_VHA_MARK_NOT_BUSY(sp->vha);
  	mempool_free(sp, sp->vha->hw->srb_mempool);
  }
  
  static inline void
  qla2x00_init_timer(srb_t *sp, unsigned long tmo)
  {
  	init_timer(&sp->u.iocb_cmd.timer);
  	sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
  	sp->u.iocb_cmd.timer.data = (unsigned long)sp;
  	sp->u.iocb_cmd.timer.function = qla2x00_sp_timeout;
  	add_timer(&sp->u.iocb_cmd.timer);
  	sp->free = qla2x00_sp_free;
  	if (IS_QLAFX00(sp->vha->hw) && (sp->type == SRB_FXIOCB_DCMD))
  		init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
  	if (sp->type == SRB_ELS_DCMD)
  		init_completion(&sp->u.iocb_cmd.u.els_logo.comp);
  }
  
  static inline int
  qla2x00_gid_list_size(struct qla_hw_data *ha)
  {
  	if (IS_QLAFX00(ha))
  		return sizeof(uint32_t) * 32;
  	else
  		return sizeof(struct gid_list_info) * ha->max_fibre_devices;
  }
  
  static inline void
  qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
  {
  	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
  	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
  		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
  		clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
  		complete(&ha->mbx_intr_comp);
  	}
  }
  
  static inline void
  qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
  {
  	if (retry_delay)
  		fcport->retry_delay_timestamp = jiffies +
  		    (retry_delay * HZ / 10);
  }
  