qla_inline.h

Go to the documentation of this file.

/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2012 QLogic Corporation
 *
 * See LICENSE.qla2xxx for copyright and licensing details.
 */

/*
 * 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_QLA82XX(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
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 dsd_dma *dsd_ptr, *tdsd_ptr;
    struct crc_context *ctx;

    ctx = (struct crc_context *)GET_CMD_CTX_SP(sp);

    /* 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 state transitioned from %s to %s - "
            "portid=%02x%02x%02x.\n",
            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 *
qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
{
    srb_t *sp = NULL;
    struct qla_hw_data *ha = vha->hw;
    uint8_t bail;

    QLA_VHA_MARK_BUSY(vha, bail);
    if (unlikely(bail))
        return NULL;

    sp = mempool_alloc(ha->srb_mempool, flag);
    if (!sp)
        goto done;

    memset(sp, 0, sizeof(*sp));
    sp->fcport = fcport;
    sp->iocbs = 1;
done:
    if (!sp)
        QLA_VHA_MARK_NOT_BUSY(vha);
    return sp;
}

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;
}

static inline int
qla2x00_gid_list_size(struct qla_hw_data *ha)
{
    return sizeof(struct gid_list_info) * ha->max_fibre_devices;
}