C++ scsi_host_alloc函数代码示例

/**
 * zfcp_scsi_adapter_register - Register SCSI and FC host with SCSI midlayer
 * @adapter: The zfcp adapter to register with the SCSI midlayer
 */
int zfcp_scsi_adapter_register(struct zfcp_adapter *adapter)
{
	struct ccw_dev_id dev_id;

	if (adapter->scsi_host)
		return 0;

	ccw_device_get_id(adapter->ccw_device, &dev_id);
	/* register adapter as SCSI host with mid layer of SCSI stack */
	adapter->scsi_host = scsi_host_alloc(&zfcp_scsi_host_template,
					     sizeof (struct zfcp_adapter *));
	if (!adapter->scsi_host) {
		dev_err(&adapter->ccw_device->dev,
			"Registering the FCP device with the "
			"SCSI stack failed\n");
		return -EIO;
	}

	/* tell the SCSI stack some characteristics of this adapter */
	adapter->scsi_host->max_id = 511;
	adapter->scsi_host->max_lun = 0xFFFFFFFF;
	adapter->scsi_host->max_channel = 0;
	adapter->scsi_host->unique_id = dev_id.devno;
	adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
	adapter->scsi_host->transportt = zfcp_scsi_transport_template;

	adapter->scsi_host->hostdata[0] = (unsigned long) adapter;

	if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
		scsi_host_put(adapter->scsi_host);
		return -EIO;
	}

	return 0;
}

static int __devinit a2091_probe(struct zorro_dev *z,
				 const struct zorro_device_id *ent)
{
	struct Scsi_Host *instance;
	int error;
	struct a2091_scsiregs *regs;
	wd33c93_regs wdregs;
	struct a2091_hostdata *hdata;

	if (!request_mem_region(z->resource.start, 256, "wd33c93"))
		return -EBUSY;

	instance = scsi_host_alloc(&a2091_scsi_template,
				   sizeof(struct a2091_hostdata));
	if (!instance) {
		error = -ENOMEM;
		goto fail_alloc;
	}

	instance->irq = IRQ_AMIGA_PORTS;
	instance->unique_id = z->slotaddr;

	regs = (struct a2091_scsiregs *)ZTWO_VADDR(z->resource.start);
	regs->DAWR = DAWR_A2091;

	wdregs.SASR = &regs->SASR;
	wdregs.SCMD = &regs->SCMD;

	hdata = shost_priv(instance);
	hdata->wh.no_sync = 0xff;
	hdata->wh.fast = 0;
	hdata->wh.dma_mode = CTRL_DMA;
	hdata->regs = regs;

	wd33c93_init(instance, wdregs, dma_setup, dma_stop, WD33C93_FS_8_10);
	error = request_irq(IRQ_AMIGA_PORTS, a2091_intr, IRQF_SHARED,
			    "A2091 SCSI", instance);
	if (error)
		goto fail_irq;

	regs->CNTR = CNTR_PDMD | CNTR_INTEN;

	error = scsi_add_host(instance, NULL);
	if (error)
		goto fail_host;

	zorro_set_drvdata(z, instance);

	scsi_scan_host(instance);
	return 0;

fail_host:
	free_irq(IRQ_AMIGA_PORTS, instance);
fail_irq:
	scsi_host_put(instance);
fail_alloc:
	release_mem_region(z->resource.start, 256);
	return error;
}

static int __init mvme147_init(void)
{
	wd33c93_regs regs;
	struct WD33C93_hostdata *hdata;
	int error = -ENOMEM;

	if (!MACH_IS_MVME147)
		return 0;

	mvme147_shost = scsi_host_alloc(&mvme147_host_template,
			sizeof(struct WD33C93_hostdata));
	if (!mvme147_shost)
		goto err_out;
	mvme147_shost->base = 0xfffe4000;
	mvme147_shost->irq = MVME147_IRQ_SCSI_PORT;

	regs.SASR = (volatile unsigned char *)0xfffe4000;
	regs.SCMD = (volatile unsigned char *)0xfffe4001;

	hdata = shost_priv(mvme147_shost);
	hdata->no_sync = 0xff;
	hdata->fast = 0;
	hdata->dma_mode = CTRL_DMA;

	wd33c93_init(mvme147_shost, regs, dma_setup, dma_stop, WD33C93_FS_8_10);

	error = request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
			"MVME147 SCSI PORT", mvme147_shost);
	if (error)
		goto err_unregister;
	error = request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
			"MVME147 SCSI DMA", mvme147_shost);
	if (error)
		goto err_free_irq;
#if 0	/* Disabled; causes problems booting */
	m147_pcc->scsi_interrupt = 0x10;	/* Assert SCSI bus reset */
	udelay(100);
	m147_pcc->scsi_interrupt = 0x00;	/* Negate SCSI bus reset */
	udelay(2000);
	m147_pcc->scsi_interrupt = 0x40;	/* Clear bus reset interrupt */
#endif
	m147_pcc->scsi_interrupt = 0x09;	/* Enable interrupt */

	m147_pcc->dma_cntrl = 0x00;	/* ensure DMA is stopped */
	m147_pcc->dma_intr = 0x89;	/* Ack and enable ints */

	error = scsi_add_host(mvme147_shost, NULL);
	if (error)
		goto err_free_irq;
	scsi_scan_host(mvme147_shost);
	return 0;

err_free_irq:
	free_irq(MVME147_IRQ_SCSI_PORT, mvme147_shost);
err_unregister:
	scsi_host_put(mvme147_shost);
err_out:
	return error;
}

static int dmx3191d_probe_one(struct pci_dev *pdev,
			      const struct pci_device_id *id)
{
	struct Scsi_Host *shost;
	struct NCR5380_hostdata *hostdata;
	unsigned long io;
	int error = -ENODEV;

	if (pci_enable_device(pdev))
		goto out;

	io = pci_resource_start(pdev, 0);
	if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
		printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
				io, io + DMX3191D_REGION_LEN);
		goto out_disable_device;
	}

	shost = scsi_host_alloc(&dmx3191d_driver_template,
			sizeof(struct NCR5380_hostdata));
	if (!shost)
		goto out_release_region;       

	hostdata = shost_priv(shost);
	hostdata->base = io;

	/* This card does not seem to raise an interrupt on pdev->irq.
	 * Steam-powered SCSI controllers run without an IRQ anyway.
	 */
	shost->irq = NO_IRQ;

	error = NCR5380_init(shost, 0);
	if (error)
		goto out_host_put;

	NCR5380_maybe_reset_bus(shost);

	pci_set_drvdata(pdev, shost);

	error = scsi_add_host(shost, &pdev->dev);
	if (error)
		goto out_exit;

	scsi_scan_host(shost);
	return 0;

out_exit:
	NCR5380_exit(shost);
out_host_put:
	scsi_host_put(shost);
 out_release_region:
	release_region(io, DMX3191D_REGION_LEN);
 out_disable_device:
	pci_disable_device(pdev);
 out:
	return error;
}

static int __devinit
cumanascsi1_probe(struct expansion_card *ec, const struct ecard_id *id)
{
	struct Scsi_Host *host;
	int ret = -ENOMEM;

	host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
	if (!host)
		goto out;

        host->io_port = ecard_address(ec, ECARD_IOC, ECARD_SLOW) + 0x800;
	host->irq = ec->irq;

	NCR5380_init(host, 0);

	host->n_io_port = 255;
	if (!(request_region(host->io_port, host->n_io_port, "CumanaSCSI-1"))) {
		ret = -EBUSY;
		goto out_free;
	}

        ((struct NCR5380_hostdata *)host->hostdata)->ctrl = 0;
        outb(0x00, host->io_port - 577);

	ret = request_irq(host->irq, cumanascsi_intr, SA_INTERRUPT,
			  "CumanaSCSI-1", host);
	if (ret) {
		printk("scsi%d: IRQ%d not free: %d\n",
		    host->host_no, host->irq, ret);
		goto out_release;
	}

	printk("scsi%d: at port 0x%08lx irq %d",
		host->host_no, host->io_port, host->irq);
	printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
		host->can_queue, host->cmd_per_lun, CUMANASCSI_PUBLIC_RELEASE);
	printk("\nscsi%d:", host->host_no);
	NCR5380_print_options(host);
	printk("\n");

	ret = scsi_add_host(host, &ec->dev);
	if (ret)
		goto out_free_irq;

	scsi_scan_host(host);
	goto out;

 out_free_irq:
	free_irq(host->irq, host);
 out_release:
	release_region(host->io_port, host->n_io_port);
 out_free:
	scsi_host_put(host);
 out:
	return ret;
}

static struct Scsi_Host *qlogic_detect(struct scsi_host_template *host,
				struct pcmcia_device *link, int qbase, int qlirq)
{
	int qltyp;		/* type of chip */
	int qinitid;
	struct Scsi_Host *shost;	/* registered host structure */
	struct qlogicfas408_priv *priv;

	qltyp = qlogicfas408_get_chip_type(qbase, INT_TYPE);
	qinitid = host->this_id;
	if (qinitid < 0)
		qinitid = 7;	/* if no ID, use 7 */

	qlogicfas408_setup(qbase, qinitid, INT_TYPE);

	host->name = qlogic_name;
	shost = scsi_host_alloc(host, sizeof(struct qlogicfas408_priv));
	if (!shost)
		goto err;
	shost->io_port = qbase;
	shost->n_io_port = 16;
	shost->dma_channel = -1;
	if (qlirq != -1)
		shost->irq = qlirq;

	priv = get_priv_by_host(shost);
	priv->qlirq = qlirq;
	priv->qbase = qbase;
	priv->qinitid = qinitid;
	priv->shost = shost;
	priv->int_type = INT_TYPE;					

	if (request_irq(qlirq, qlogicfas408_ihandl, 0, qlogic_name, shost))
		goto free_scsi_host;

	sprintf(priv->qinfo,
		"Qlogicfas Driver version 0.46, chip %02X at %03X, IRQ %d, TPdma:%d",
		qltyp, qbase, qlirq, QL_TURBO_PDMA);

	if (scsi_add_host(shost, NULL))
		goto free_interrupt;

	scsi_scan_host(shost);

	return shost;

free_interrupt:
	free_irq(qlirq, shost);

free_scsi_host:
	scsi_host_put(shost);
	
err:
	return NULL;
}

static int __devinit dmx3191d_probe_one(struct pci_dev *pdev,
        const struct pci_device_id *id)
{
    struct Scsi_Host *shost;
    unsigned long io;
    int error = -ENODEV;

    if (pci_enable_device(pdev))
        goto out;

    io = pci_resource_start(pdev, 0);
    if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
        printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
                io, io + DMX3191D_REGION_LEN);
        goto out_disable_device;
    }

    shost = scsi_host_alloc(&dmx3191d_driver_template,
            sizeof(struct NCR5380_hostdata));
    if (!shost)
        goto out_release_region;       
    shost->io_port = io;
    shost->irq = pdev->irq;

    NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);

    if (request_irq(pdev->irq, NCR5380_intr, IRQF_SHARED,
                DMX3191D_DRIVER_NAME, shost)) {
        /*
         * Steam powered scsi controllers run without an IRQ anyway
         */
        printk(KERN_WARNING "dmx3191: IRQ %d not available - "
                    "switching to polled mode.\n", pdev->irq);
        shost->irq = SCSI_IRQ_NONE;
    }

    pci_set_drvdata(pdev, shost);

    error = scsi_add_host(shost, &pdev->dev);
    if (error)
        goto out_free_irq;

    scsi_scan_host(shost);
    return 0;

 out_free_irq:
    free_irq(shost->irq, shost);
 out_release_region:
    release_region(io, DMX3191D_REGION_LEN);
 out_disable_device:
    pci_disable_device(pdev);
 out:
    return error;
}

static int
cciss_scsi_detect(ctlr_info_t *h)
{
	struct Scsi_Host *sh;
	int error;

	sh = scsi_host_alloc(&cciss_driver_template, sizeof(struct ctlr_info *));
	if (sh == NULL)
		goto fail;
	sh->io_port = 0;	// good enough?  FIXME, 
	sh->n_io_port = 0;	// I do

static int __devinit
oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
{
	struct Scsi_Host *host;
	int ret = -ENOMEM;

	ret = ecard_request_resources(ec);
	if (ret)
		goto out;

	host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
	if (!host) {
		ret = -ENOMEM;
		goto release;
	}

	priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
				   ecard_resource_len(ec, ECARD_RES_MEMC));
	if (!priv(host)->base) {
		ret = -ENOMEM;
		goto unreg;
	}

	host->irq = IRQ_NONE;
	host->n_io_port = 255;

	NCR5380_init(host, 0);

	printk("scsi%d: at port 0x%08lx irqs disabled",
		host->host_no, host->io_port);
	printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
		host->can_queue, host->cmd_per_lun, OAKSCSI_PUBLIC_RELEASE);
	printk("\nscsi%d:", host->host_no);
	NCR5380_print_options(host);
	printk("\n");

	ret = scsi_add_host(host, &ec->dev);
	if (ret)
		goto out_unmap;

	scsi_scan_host(host);
	goto out;

 out_unmap:
	iounmap(priv(host)->base);
 unreg:
	scsi_host_put(host);
 release:
	ecard_release_resources(ec);
 out:
	return ret;
}

static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
{
	struct Scsi_Host *host;
	int ret = -ENOMEM;

	ret = ecard_request_resources(ec);
	if (ret)
		goto out;

	host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
	if (!host) {
		ret = -ENOMEM;
		goto release;
	}

	priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
				   ecard_resource_len(ec, ECARD_RES_MEMC));
	if (!priv(host)->base) {
		ret = -ENOMEM;
		goto unreg;
	}

	host->irq = NO_IRQ;
	host->n_io_port = 255;

	ret = NCR5380_init(host, 0);
	if (ret)
		goto out_unmap;

	NCR5380_maybe_reset_bus(host);

	ret = scsi_add_host(host, &ec->dev);
	if (ret)
		goto out_exit;

	scsi_scan_host(host);
	goto out;

 out_exit:
	NCR5380_exit(host);
 out_unmap:
	iounmap(priv(host)->base);
 unreg:
	scsi_host_put(host);
 release:
	ecard_release_resources(ec);
 out:
	return ret;
}

static int tcm_loop_driver_probe(struct device *dev)
{
	struct tcm_loop_hba *tl_hba;
	struct Scsi_Host *sh;
	int error, host_prot;

	tl_hba = to_tcm_loop_hba(dev);

	sh = scsi_host_alloc(&tcm_loop_driver_template,
			sizeof(struct tcm_loop_hba));
	if (!sh) {
		pr_err("Unable to allocate struct scsi_host\n");
		return -ENODEV;
	}
	tl_hba->sh = sh;

	/*
	 * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata
	 */
	*((struct tcm_loop_hba **)sh->hostdata) = tl_hba;
	/*
	 * Setup single ID, Channel and LUN for now..
	 */
	sh->max_id = 2;
	sh->max_lun = 0;
	sh->max_channel = 0;
	sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN;

	host_prot = SHOST_DIF_TYPE1_PROTECTION | SHOST_DIF_TYPE2_PROTECTION |
		    SHOST_DIF_TYPE3_PROTECTION | SHOST_DIX_TYPE1_PROTECTION |
		    SHOST_DIX_TYPE2_PROTECTION | SHOST_DIX_TYPE3_PROTECTION;

	scsi_host_set_prot(sh, host_prot);
	scsi_host_set_guard(sh, SHOST_DIX_GUARD_CRC);

	error = scsi_add_host(sh, &tl_hba->dev);
	if (error) {
		pr_err("%s: scsi_add_host failed\n", __func__);
		scsi_host_put(sh);
		return -ENODEV;
	}
	return 0;
}

static int __devinit
oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
{
	struct Scsi_Host *host;
	int ret = -ENOMEM;

	host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
	if (!host)
		goto out;

	host->io_port = ecard_address(ec, ECARD_MEMC, 0);
	host->irq = IRQ_NONE;
	host->n_io_port = 255;

	ret = -EBUSY;
	if (!request_region (host->io_port, host->n_io_port, "Oak SCSI"))
		goto unreg;

	NCR5380_init(host, 0);

	printk("scsi%d: at port 0x%08lx irqs disabled",
		host->host_no, host->io_port);
	printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
		host->can_queue, host->cmd_per_lun, OAKSCSI_PUBLIC_RELEASE);
	printk("\nscsi%d:", host->host_no);
	NCR5380_print_options(host);
	printk("\n");

	ret = scsi_add_host(host, &ec->dev);
	if (ret)
		goto out_release;

	scsi_scan_host(host);
	goto out;

 out_release:
	release_region(host->io_port, host->n_io_port);
 unreg:
	scsi_host_put(host);
 out:
	return ret;
}

static int tcm_loop_driver_probe(struct device *dev)
{
	struct tcm_loop_hba *tl_hba;
	struct Scsi_Host *sh;
	int error;

	tl_hba = to_tcm_loop_hba(dev);

	sh = scsi_host_alloc(&tcm_loop_driver_template,
			sizeof(struct tcm_loop_hba));
	if (!sh) {
		printk(KERN_ERR "Unable to allocate struct scsi_host\n");
		return -ENODEV;
	}
	tl_hba->sh = sh;

	/*
	 * Assign the struct tcm_loop_hba pointer to struct Scsi_Host->hostdata
	 */
	*((struct tcm_loop_hba **)sh->hostdata) = tl_hba;
	/*
	 * Setup single ID, Channel and LUN for now..
	 */
	sh->max_id = 2;
	sh->max_lun = 0;
	sh->max_channel = 0;
	sh->max_cmd_len = TL_SCSI_MAX_CMD_LEN;

	error = scsi_add_host(sh, &tl_hba->dev);
	if (error) {
		printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
		scsi_host_put(sh);
		return -ENODEV;
	}
	return 0;
}

static int __devinit esp_sun3x_probe(struct platform_device *dev)
{
	struct scsi_host_template *tpnt = &scsi_esp_template;
	struct Scsi_Host *host;
	struct esp *esp;
	struct resource *res;
	int err = -ENOMEM;

	host = scsi_host_alloc(tpnt, sizeof(struct esp));
	if (!host)
		goto fail;

	host->max_id = 8;
	esp = shost_priv(host);

	esp->host = host;
	esp->dev = dev;
	esp->ops = &sun3x_esp_ops;

	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
	if (!res && !res->start)
		goto fail_unlink;

	esp->regs = ioremap_nocache(res->start, 0x20);
	if (!esp->regs)
		goto fail_unmap_regs;

	res = platform_get_resource(dev, IORESOURCE_MEM, 1);
	if (!res && !res->start)
		goto fail_unmap_regs;

	esp->dma_regs = ioremap_nocache(res->start, 0x10);

	esp->command_block = dma_alloc_coherent(esp->dev, 16,
						&esp->command_block_dma,
						GFP_KERNEL);
	if (!esp->command_block)
		goto fail_unmap_regs_dma;

	host->irq = platform_get_irq(dev, 0);
	err = request_irq(host->irq, scsi_esp_intr, IRQF_SHARED,
			  "SUN3X ESP", esp);
	if (err < 0)
		goto fail_unmap_command_block;

	esp->scsi_id = 7;
	esp->host->this_id = esp->scsi_id;
	esp->scsi_id_mask = (1 << esp->scsi_id);
	esp->cfreq = 20000000;

	dev_set_drvdata(&dev->dev, esp);

	err = scsi_esp_register(esp, &dev->dev);
	if (err)
		goto fail_free_irq;

	return 0;

fail_free_irq:
	free_irq(host->irq, esp);
fail_unmap_command_block:
	dma_free_coherent(esp->dev, 16,
			  esp->command_block,
			  esp->command_block_dma);
fail_unmap_regs_dma:
	iounmap(esp->dma_regs);
fail_unmap_regs:
	iounmap(esp->regs);
fail_unlink:
	scsi_host_put(host);
fail:
	return err;
}

static int rtsx_probe(struct pci_dev *pci,
				const struct pci_device_id *pci_id)
{
	struct Scsi_Host *host;
	struct rtsx_dev *dev;
	int err = 0;
	struct task_struct *th;

	dev_dbg(&pci->dev, "Realtek PCI-E card reader detected\n");

	err = pcim_enable_device(pci);
	if (err < 0) {
		dev_err(&pci->dev, "PCI enable device failed!\n");
		return err;
	}

	err = pci_request_regions(pci, CR_DRIVER_NAME);
	if (err < 0) {
		dev_err(&pci->dev, "PCI request regions for %s failed!\n",
			CR_DRIVER_NAME);
		return err;
	}

	/*
	 * Ask the SCSI layer to allocate a host structure, with extra
	 * space at the end for our private rtsx_dev structure.
	 */
	host = scsi_host_alloc(&rtsx_host_template, sizeof(*dev));
	if (!host) {
		dev_err(&pci->dev, "Unable to allocate the scsi host\n");
		return -ENOMEM;
	}

	dev = host_to_rtsx(host);
	memset(dev, 0, sizeof(struct rtsx_dev));

	dev->chip = kzalloc(sizeof(struct rtsx_chip), GFP_KERNEL);
	if (!dev->chip) {
		err = -ENOMEM;
		goto errout;
	}

	spin_lock_init(&dev->reg_lock);
	mutex_init(&(dev->dev_mutex));
	init_completion(&dev->cmnd_ready);
	init_completion(&dev->control_exit);
	init_completion(&dev->polling_exit);
	init_completion(&(dev->notify));
	init_completion(&dev->scanning_done);
	init_waitqueue_head(&dev->delay_wait);

	dev->pci = pci;
	dev->irq = -1;

	dev_info(&pci->dev, "Resource length: 0x%x\n",
		 (unsigned int)pci_resource_len(pci, 0));
	dev->addr = pci_resource_start(pci, 0);
	dev->remap_addr = ioremap_nocache(dev->addr, pci_resource_len(pci, 0));
	if (!dev->remap_addr) {
		dev_err(&pci->dev, "ioremap error\n");
		err = -ENXIO;
		goto errout;
	}

	/*
	 * Using "unsigned long" cast here to eliminate gcc warning in
	 * 64-bit system
	 */
	dev_info(&pci->dev, "Original address: 0x%lx, remapped address: 0x%lx\n",
		 (unsigned long)(dev->addr), (unsigned long)(dev->remap_addr));

	dev->rtsx_resv_buf = dmam_alloc_coherent(&pci->dev, RTSX_RESV_BUF_LEN,
			&dev->rtsx_resv_buf_addr, GFP_KERNEL);
	if (!dev->rtsx_resv_buf) {
		dev_err(&pci->dev, "alloc dma buffer fail\n");
		err = -ENXIO;
		goto errout;
	}
	dev->chip->host_cmds_ptr = dev->rtsx_resv_buf;
	dev->chip->host_cmds_addr = dev->rtsx_resv_buf_addr;
	dev->chip->host_sg_tbl_ptr = dev->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
	dev->chip->host_sg_tbl_addr = dev->rtsx_resv_buf_addr +
				      HOST_CMDS_BUF_LEN;

	dev->chip->rtsx = dev;

	rtsx_init_options(dev->chip);

	dev_info(&pci->dev, "pci->irq = %d\n", pci->irq);

	if (dev->chip->msi_en) {
		if (pci_enable_msi(pci) < 0)
			dev->chip->msi_en = 0;
	}

	if (rtsx_acquire_irq(dev) < 0) {
		err = -EBUSY;
		goto errout;
	}

//.........这里部分代码省略.........