qla_os.c

来自「linux 内核源代码」· C语言 代码 · 共 2,525 行 · 第 1/5 页

skip_pio:
	/* Use MMIO operations for all accesses. */
	mmio = pci_resource_start(ha->pdev, 1);
	mmio_len = pci_resource_len(ha->pdev, 1);
	mmio_flags = pci_resource_flags(ha->pdev, 1);

	if (!(mmio_flags & IORESOURCE_MEM)) {
		qla_printk(KERN_ERR, ha,
		    "region #0 not an MMIO resource (%s), aborting\n",
		    pci_name(ha->pdev));
		goto iospace_error_exit;
	}
	if (mmio_len < MIN_IOBASE_LEN) {
		qla_printk(KERN_ERR, ha,
		    "Invalid PCI mem region size (%s), aborting\n",
			pci_name(ha->pdev));
		goto iospace_error_exit;
	}

	ha->iobase = ioremap(mmio, MIN_IOBASE_LEN);
	if (!ha->iobase) {
		qla_printk(KERN_ERR, ha,
		    "cannot remap MMIO (%s), aborting\n", pci_name(ha->pdev));

		goto iospace_error_exit;
	}

	return (0);

iospace_error_exit:
	return (-ENOMEM);
}

static void
qla2xxx_scan_start(struct Scsi_Host *shost)
{
	scsi_qla_host_t *ha = shost_priv(shost);

	set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
	set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
	set_bit(RSCN_UPDATE, &ha->dpc_flags);
}

static int
qla2xxx_scan_finished(struct Scsi_Host *shost, unsigned long time)
{
	scsi_qla_host_t *ha = shost_priv(shost);

	if (!ha->host)
		return 1;
	if (time > ha->loop_reset_delay * HZ)
		return 1;

	return atomic_read(&ha->loop_state) == LOOP_READY;
}

/*
 * PCI driver interface
 */
static int __devinit
qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
	int	ret = -ENODEV;
	device_reg_t __iomem *reg;
	struct Scsi_Host *host;
	scsi_qla_host_t *ha;
	unsigned long	flags = 0;
	char pci_info[30];
	char fw_str[30];
	struct scsi_host_template *sht;
	int bars;

	bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
	sht = &qla2x00_driver_template;
	if (pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2422 ||
	    pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2432 ||
	    pdev->device == PCI_DEVICE_ID_QLOGIC_ISP5422 ||
	    pdev->device == PCI_DEVICE_ID_QLOGIC_ISP5432 ||
	    pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2532) {
		bars = pci_select_bars(pdev, IORESOURCE_MEM);
		sht = &qla24xx_driver_template;
	}

	if (pci_enable_device_bars(pdev, bars))
		goto probe_out;

	if (pci_find_aer_capability(pdev))
		if (pci_enable_pcie_error_reporting(pdev))
			goto probe_out;

	host = scsi_host_alloc(sht, sizeof(scsi_qla_host_t));
	if (host == NULL) {
		printk(KERN_WARNING
		    "qla2xxx: Couldn't allocate host from scsi layer!\n");
		goto probe_disable_device;
	}

	/* Clear our data area */
	ha = shost_priv(host);
	memset(ha, 0, sizeof(scsi_qla_host_t));

	ha->pdev = pdev;
	ha->host = host;
	ha->host_no = host->host_no;
	sprintf(ha->host_str, "%s_%ld", QLA2XXX_DRIVER_NAME, ha->host_no);
	ha->parent = NULL;
	ha->bars = bars;

	/* Set ISP-type information. */
	qla2x00_set_isp_flags(ha);

	/* Configure PCI I/O space */
	ret = qla2x00_iospace_config(ha);
	if (ret)
		goto probe_failed;

	qla_printk(KERN_INFO, ha,
	    "Found an ISP%04X, irq %d, iobase 0x%p\n", pdev->device, pdev->irq,
	    ha->iobase);

	spin_lock_init(&ha->hardware_lock);

	ha->prev_topology = 0;
	ha->init_cb_size = sizeof(init_cb_t);
	ha->mgmt_svr_loop_id = MANAGEMENT_SERVER + ha->vp_idx;
	ha->link_data_rate = PORT_SPEED_UNKNOWN;
	ha->optrom_size = OPTROM_SIZE_2300;

	ha->max_q_depth = MAX_Q_DEPTH;
	if (ql2xmaxqdepth != 0 && ql2xmaxqdepth <= 0xffffU)
		ha->max_q_depth = ql2xmaxqdepth;

	/* Assign ISP specific operations. */
	if (IS_QLA2100(ha)) {
		host->max_id = MAX_TARGETS_2100;
		ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
		ha->request_q_length = REQUEST_ENTRY_CNT_2100;
		ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
		ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
		host->sg_tablesize = 32;
		ha->gid_list_info_size = 4;
		ha->isp_ops = &qla2100_isp_ops;
	} else if (IS_QLA2200(ha)) {
		host->max_id = MAX_TARGETS_2200;
		ha->mbx_count = MAILBOX_REGISTER_COUNT;
		ha->request_q_length = REQUEST_ENTRY_CNT_2200;
		ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
		ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
		ha->gid_list_info_size = 4;
		ha->isp_ops = &qla2100_isp_ops;
	} else if (IS_QLA23XX(ha)) {
		host->max_id = MAX_TARGETS_2200;
		ha->mbx_count = MAILBOX_REGISTER_COUNT;
		ha->request_q_length = REQUEST_ENTRY_CNT_2200;
		ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
		ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
		ha->gid_list_info_size = 6;
		if (IS_QLA2322(ha) || IS_QLA6322(ha))
			ha->optrom_size = OPTROM_SIZE_2322;
		ha->isp_ops = &qla2300_isp_ops;
	} else if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
		host->max_id = MAX_TARGETS_2200;
		ha->mbx_count = MAILBOX_REGISTER_COUNT;
		ha->request_q_length = REQUEST_ENTRY_CNT_24XX;
		ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
		ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
		ha->init_cb_size = sizeof(struct mid_init_cb_24xx);
		ha->mgmt_svr_loop_id = 10 + ha->vp_idx;
		ha->gid_list_info_size = 8;
		ha->optrom_size = OPTROM_SIZE_24XX;
		ha->isp_ops = &qla24xx_isp_ops;
	} else if (IS_QLA25XX(ha)) {
		host->max_id = MAX_TARGETS_2200;
		ha->mbx_count = MAILBOX_REGISTER_COUNT;
		ha->request_q_length = REQUEST_ENTRY_CNT_24XX;
		ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
		ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
		ha->init_cb_size = sizeof(struct mid_init_cb_24xx);
		ha->mgmt_svr_loop_id = 10 + ha->vp_idx;
		ha->gid_list_info_size = 8;
		ha->optrom_size = OPTROM_SIZE_25XX;
		ha->isp_ops = &qla25xx_isp_ops;
	}
	host->can_queue = ha->request_q_length + 128;

	/* load the F/W, read paramaters, and init the H/W */
	ha->instance = num_hosts;

	init_MUTEX(&ha->mbx_cmd_sem);
	init_MUTEX(&ha->vport_sem);
	init_MUTEX_LOCKED(&ha->mbx_intr_sem);

	INIT_LIST_HEAD(&ha->list);
	INIT_LIST_HEAD(&ha->fcports);
	INIT_LIST_HEAD(&ha->vp_list);

	set_bit(0, (unsigned long *) ha->vp_idx_map);

	qla2x00_config_dma_addressing(ha);
	if (qla2x00_mem_alloc(ha)) {
		qla_printk(KERN_WARNING, ha,
		    "[ERROR] Failed to allocate memory for adapter\n");

		ret = -ENOMEM;
		goto probe_failed;
	}

	if (qla2x00_initialize_adapter(ha)) {
		qla_printk(KERN_WARNING, ha,
		    "Failed to initialize adapter\n");

		DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
		    "Adapter flags %x.\n",
		    ha->host_no, ha->device_flags));

		ret = -ENODEV;
		goto probe_failed;
	}

	/*
	 * Startup the kernel thread for this host adapter
	 */
	ha->dpc_thread = kthread_create(qla2x00_do_dpc, ha,
			"%s_dpc", ha->host_str);
	if (IS_ERR(ha->dpc_thread)) {
		qla_printk(KERN_WARNING, ha,
		    "Unable to start DPC thread!\n");
		ret = PTR_ERR(ha->dpc_thread);
		goto probe_failed;
	}

	host->this_id = 255;
	host->cmd_per_lun = 3;
	host->unique_id = ha->instance;
	host->max_cmd_len = MAX_CMDSZ;
	host->max_channel = MAX_BUSES - 1;
	host->max_lun = MAX_LUNS;
	host->transportt = qla2xxx_transport_template;

	ret = qla2x00_request_irqs(ha);
	if (ret)
		goto probe_failed;

	/* Initialized the timer */
	qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);

	DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
	    ha->host_no, ha));

	ha->isp_ops->disable_intrs(ha);

	spin_lock_irqsave(&ha->hardware_lock, flags);
	reg = ha->iobase;
	if (IS_FWI2_CAPABLE(ha)) {
		WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
		WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
	} else {
		WRT_REG_WORD(&reg->isp.semaphore, 0);
		WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
		WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);

		/* Enable proper parity */
		if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
			if (IS_QLA2300(ha))
				/* SRAM parity */
				WRT_REG_WORD(&reg->isp.hccr,
				    (HCCR_ENABLE_PARITY + 0x1));
			else
				/* SRAM, Instruction RAM and GP RAM parity */
				WRT_REG_WORD(&reg->isp.hccr,
				    (HCCR_ENABLE_PARITY + 0x7));
		}
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	ha->isp_ops->enable_intrs(ha);

	pci_set_drvdata(pdev, ha);

	ha->flags.init_done = 1;
	ha->flags.online = 1;

	num_hosts++;

	ret = scsi_add_host(host, &pdev->dev);
	if (ret)
		goto probe_failed;

	scsi_scan_host(host);

	qla2x00_alloc_sysfs_attr(ha);

	qla2x00_init_host_attr(ha);

	qla_printk(KERN_INFO, ha, "\n"
	    " QLogic Fibre Channel HBA Driver: %s\n"
	    "  QLogic %s - %s\n"
	    "  ISP%04X: %s @ %s hdma%c, host#=%ld, fw=%s\n",
	    qla2x00_version_str, ha->model_number,
	    ha->model_desc ? ha->model_desc: "", pdev->device,
	    ha->isp_ops->pci_info_str(ha, pci_info), pci_name(pdev),
	    ha->flags.enable_64bit_addressing ? '+': '-', ha->host_no,
	    ha->isp_ops->fw_version_str(ha, fw_str));

	return 0;

probe_failed:
	qla2x00_free_device(ha);

	scsi_host_put(host);

probe_disable_device:
	pci_disable_device(pdev);

probe_out:
	return ret;
}

static void
qla2x00_remove_one(struct pci_dev *pdev)
{
	scsi_qla_host_t *ha;

	ha = pci_get_drvdata(pdev);

	qla2x00_free_sysfs_attr(ha);

	fc_remove_host(ha->host);

	scsi_remove_host(ha->host);

	qla2x00_free_device(ha);

	scsi_host_put(ha->host);

	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
}

static void
qla2x00_free_device(scsi_qla_host_t *ha)
{
	/* Disable timer */
	if (ha->timer_active)
		qla2x00_stop_timer(ha);

	/* Kill the kernel thread for this host */
	if (ha->dpc_thread) {
		struct task_struct *t = ha->dpc_thread;

		/*
		 * qla2xxx_wake_dpc checks for ->dpc_thread
		 * so we need to zero it out.
		 */
		ha->dpc_thread = NULL;
		kthread_stop(t);
	}

	if (ha->eft)
		qla2x00_trace_control(ha, TC_DISABLE, 0, 0);

	ha->flags.online = 0;

	/* Stop currently executing firmware. */
	qla2x00_try_to_stop_firmware(ha);

	/* turn-off interrupts on the card */
	if (ha->interrupts_on)
		ha->isp_ops->disable_intrs(ha);

	qla2x00_mem_free(ha);

	qla2x00_free_irqs(ha);

	/* release io space registers  */
	if (ha->iobase)
		iounmap(ha->iobase);
	pci_release_selected_regions(ha->pdev, ha->bars);
}

static inline void
qla2x00_schedule_rport_del(struct scsi_qla_host *ha, fc_port_t *fcport,
    int defer)
{
	unsigned long flags;
	struct fc_rport *rport;

	if (!fcport->rport)
		return;

	rport = fcport->rport;
	if (defer) {
		spin_lock_irqsave(&fcport->rport_lock, flags);
		fcport->drport = rport;
		fcport->rport = NULL;
		*(fc_port_t **)rport->dd_data = NULL;
		spin_unlock_irqrestore(&fcport->rport_lock, flags);
		set_bit(FCPORT_UPDATE_NEEDED, &ha->dpc_flags);
	} else {
		spin_lock_irqsave(&fcport->rport_lock, flags);
		fcport->rport = NULL;
		*(fc_port_t **)rport->dd_data = NULL;
		spin_unlock_irqrestore(&fcport->rport_lock, flags);
		fc_remote_port_delete(rport);
	}
}

/*
 * qla2x00_mark_device_lost Updates fcport state when device goes offline.
 *
 * Input: ha = adapter block pointer.  fcport = port structure pointer.
 *
 * Return: None.
 *
 * Context:
 */
void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
    int do_login, int defer)
{
	if (atomic_read(&fcport->state) == FCS_ONLINE &&
	    ha->vp_idx == fcport->vp_idx)
		qla2x00_schedule_rport_del(ha, fcport, defer);

	/*
	 * We may need to retry the login, so don't change the state of the
	 * port but do the retries.
	 */
	if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
		atomic_set(&fcport->state, FCS_DEVICE_LOST);

	if (!do_login)
		return;

	if (fcport->login_retry == 0) {
		fcport->login_retry = ha->login_retry_count;
		set_bit(RELOGIN_NEEDED, &ha->dpc_flags);

		DEBUG(printk("scsi(%ld): Port login retry: "
		    "%02x%02x%02x%02x%02x%02x%02x%02x, "
		    "id = 0x%04x retry cnt=%d\n",
		    ha->host_no,
		    fcport->port_name[0],
		    fcport->port_name[1],
		    fcport->port_name[2],
		    fcport->port_name[3],
		    fcport->port_name[4],
		    fcport->port_name[5],
		    fcport->port_name[6],
		    fcport->port_name[7],
		    fcport->loop_id,
		    fcport->login_retry));
	}
}

/*
 * qla2x00_mark_all_devices_lost
 *	Updates fcport state when device goes offline.
 *
 * Input:
 *	ha = adapter block pointer.
 *	fcport = port structure pointer.
 *
 * Return:
 *	None.
 *
 * Context:
 */
void
qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha, int defer)
{
	fc_port_t *fcport;
	scsi_qla_host_t *pha = to_qla_parent(ha);

	list_for_each_entry(fcport, &pha->fcports, list) {
		if (ha->vp_idx != 0 && ha->vp_idx != fcport->vp_idx)
			continue;
		/*
		 * No point in marking the device as lost, if the device is
		 * already DEAD.
		 */
		if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
			continue;
		if (atomic_read(&fcport->state) == FCS_ONLINE) {
			if (defer)
				qla2x00_schedule_rport_del(ha, fcport, defer);
			else if (ha->vp_idx == fcport->vp_idx)
				qla2x00_schedule_rport_del(ha, fcport, defer);
		}
		atomic_set(&fcport->state, FCS_DEVICE_LOST);
	}

	if (defer)
		qla2xxx_wake_dpc(ha);
}

/*
* qla2x00_mem_alloc
*      Allocates adapter memory.
*
* Returns:
*      0  = success.
*      1  = failure.
*/
uint8_t
qla2x00_mem_alloc(scsi_qla_host_t *ha)