Commit 4e6b79fa authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
Browse files

libata: factor out ata_pci_activate_sff_host() from ata_pci_one() 



Factor out ata_pci_activate_sff_host() from ata_pci_one().  This does
about the same thing as ata_host_activate() but needs to be separate
because SFF controllers use different and multiple IRQs in legacy
mode.

This will be used to make SFF LLD initialization more flexible.

Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent cadb7345

drivers/ata/libata-core.c

+1 −0
Original line number Diff line number Diff line
@@ -7629,6 +7629,7 @@ EXPORT_SYMBOL_GPL(pci_test_config_bits); 
EXPORT_SYMBOL_GPL(ata_pci_init_sff_host);

EXPORT_SYMBOL_GPL(ata_pci_init_bmdma);

EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host);

EXPORT_SYMBOL_GPL(ata_pci_activate_sff_host);

EXPORT_SYMBOL_GPL(ata_pci_init_one);

EXPORT_SYMBOL_GPL(ata_pci_remove_one);

#ifdef CONFIG_PM

drivers/ata/libata-sff.c

+103 −84
Original line number Diff line number Diff line
@@ -713,6 +713,99 @@ int ata_pci_prepare_sff_host(struct pci_dev *pdev, 
	return rc;

}



/**

 *	ata_pci_activate_sff_host - start SFF host, request IRQ and register it

 *	@host: target SFF ATA host

 *	@irq_handler: irq_handler used when requesting IRQ(s)

 *	@sht: scsi_host_template to use when registering the host

 *

 *	This is the counterpart of ata_host_activate() for SFF ATA

 *	hosts.  This separate helper is necessary because SFF hosts

 *	use two separate interrupts in legacy mode.

 *

 *	LOCKING:

 *	Inherited from calling layer (may sleep).

 *

 *	RETURNS:

 *	0 on success, -errno otherwise.

 */

int ata_pci_activate_sff_host(struct ata_host *host,

			      irq_handler_t irq_handler,

			      struct scsi_host_template *sht)

{

	struct device *dev = host->dev;

	struct pci_dev *pdev = to_pci_dev(dev);

	const char *drv_name = dev_driver_string(host->dev);

	int legacy_mode = 0, rc;



	rc = ata_host_start(host);

	if (rc)

		return rc;



	if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {

		u8 tmp8, mask;



		/* TODO: What if one channel is in native mode ... */

		pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);

		mask = (1 << 2) | (1 << 0);

		if ((tmp8 & mask) != mask)

			legacy_mode = 1;

#if defined(CONFIG_NO_ATA_LEGACY)

		/* Some platforms with PCI limits cannot address compat

		   port space. In that case we punt if their firmware has

		   left a device in compatibility mode */

		if (legacy_mode) {

			printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n");

			return -EOPNOTSUPP;

		}

#endif

	}



	if (!devres_open_group(dev, NULL, GFP_KERNEL))

		return -ENOMEM;



	if (!legacy_mode && pdev->irq) {

		rc = devm_request_irq(dev, pdev->irq, irq_handler,

				      IRQF_SHARED, drv_name, host);

		if (rc)

			goto out;



		ata_port_desc(host->ports[0], "irq %d", pdev->irq);

		ata_port_desc(host->ports[1], "irq %d", pdev->irq);

	} else if (legacy_mode) {

		if (!ata_port_is_dummy(host->ports[0])) {

			rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev),

					      irq_handler, IRQF_SHARED,

					      drv_name, host);

			if (rc)

				goto out;



			ata_port_desc(host->ports[0], "irq %d",

				      ATA_PRIMARY_IRQ(pdev));

		}



		if (!ata_port_is_dummy(host->ports[1])) {

			rc = devm_request_irq(dev, ATA_SECONDARY_IRQ(pdev),

					      irq_handler, IRQF_SHARED,

					      drv_name, host);

			if (rc)

				goto out;



			ata_port_desc(host->ports[1], "irq %d",

				      ATA_SECONDARY_IRQ(pdev));

		}

	}



	rc = ata_host_register(host, sht);

 out:

	if (rc == 0)

		devres_remove_group(dev, NULL);

	else

		devres_release_group(dev, NULL);



	return rc;

}



/**

 *	ata_pci_init_one - Initialize/register PCI IDE host controller

 *	@pdev: Controller to be initialized
@@ -742,9 +835,6 @@ int ata_pci_init_one(struct pci_dev *pdev, 
	struct device *dev = &pdev->dev;

	const struct ata_port_info *pi = NULL;

	struct ata_host *host = NULL;

	const char *drv_name = dev_driver_string(&pdev->dev);

	u8 mask;

	int legacy_mode = 0;

	int i, rc;



	DPRINTK("ENTER\n");
@@ -766,95 +856,24 @@ int ata_pci_init_one(struct pci_dev *pdev, 
	if (!devres_open_group(dev, NULL, GFP_KERNEL))

		return -ENOMEM;



	/* FIXME: Really for ATA it isn't safe because the device may be

	   multi-purpose and we want to leave it alone if it was already

	   enabled. Secondly for shared use as Arjan says we want refcounting



	   Checking dev->is_enabled is insufficient as this is not set at

	   boot for the primary video which is BIOS enabled

	  */



	rc = pcim_enable_device(pdev);

	if (rc)

		goto err_out;

		goto out;



	if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {

		u8 tmp8;



		/* TODO: What if one channel is in native mode ... */

		pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);

		mask = (1 << 2) | (1 << 0);

		if ((tmp8 & mask) != mask)

			legacy_mode = 1;

#if defined(CONFIG_NO_ATA_LEGACY)

		/* Some platforms with PCI limits cannot address compat

		   port space. In that case we punt if their firmware has

		   left a device in compatibility mode */

		if (legacy_mode) {

			printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n");

			rc = -EOPNOTSUPP;

			goto err_out;

		}

#endif

	}



	/* prepare host */

	/* prepare and activate SFF host */

	rc = ata_pci_prepare_sff_host(pdev, ppi, &host);

	if (rc)

		goto err_out;

		goto out;



	pci_set_master(pdev);

	rc = ata_pci_activate_sff_host(host, pi->port_ops->irq_handler,

				       pi->sht);

 out:

	if (rc == 0)

		devres_remove_group(&pdev->dev, NULL);

	else

		devres_release_group(&pdev->dev, NULL);



	/* start host and request IRQ */

	rc = ata_host_start(host);

	if (rc)

		goto err_out;



	if (!legacy_mode && pdev->irq) {

		/* We may have no IRQ assigned in which case we can poll. This

		   shouldn't happen on a sane system but robustness is cheap

		   in this case */

		rc = devm_request_irq(dev, pdev->irq, pi->port_ops->irq_handler,

				      IRQF_SHARED, drv_name, host);

		if (rc)

			goto err_out;



		ata_port_desc(host->ports[0], "irq %d", pdev->irq);

		ata_port_desc(host->ports[1], "irq %d", pdev->irq);

	} else if (legacy_mode) {

		if (!ata_port_is_dummy(host->ports[0])) {

			rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev),

					      pi->port_ops->irq_handler,

					      IRQF_SHARED, drv_name, host);

			if (rc)

				goto err_out;



			ata_port_desc(host->ports[0], "irq %d",

				      ATA_PRIMARY_IRQ(pdev));

		}



		if (!ata_port_is_dummy(host->ports[1])) {

			rc = devm_request_irq(dev, ATA_SECONDARY_IRQ(pdev),

					      pi->port_ops->irq_handler,

					      IRQF_SHARED, drv_name, host);

			if (rc)

				goto err_out;



			ata_port_desc(host->ports[1], "irq %d",

				      ATA_SECONDARY_IRQ(pdev));

		}

	}



	/* register */

	rc = ata_host_register(host, pi->sht);

	if (rc)

		goto err_out;



	devres_remove_group(dev, NULL);

	return 0;



err_out:

	devres_release_group(dev, NULL);

	return rc;

}

include/linux/libata.h

+3 −0
Original line number Diff line number Diff line
@@ -1033,6 +1033,9 @@ extern int ata_pci_init_bmdma(struct ata_host *host); 
extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,

				    const struct ata_port_info * const * ppi,

				    struct ata_host **r_host);

extern int ata_pci_activate_sff_host(struct ata_host *host,

				     irq_handler_t irq_handler,

				     struct scsi_host_template *sht);

extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);

extern unsigned long ata_pci_default_filter(struct ata_device *dev,

					    unsigned long xfer_mask);

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