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Commit d9d7070e authored by Hidetoshi Seto's avatar Hidetoshi Seto Committed by Jesse Barnes
Browse files

PCI MSI: MSI-X cleanup, msix_setup_entries() 



Cleanup based on the prototype from Matthew Milcox.

Reviewed-by: default avatarMatthew Wilcox <willy@linux.intel.com>
Signed-off-by: default avatarHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
parent 75cb3426

drivers/pci/msi.c

+36 −23
Original line number Original line Diff line number Diff line
@@ -447,6 +447,37 @@ static void __iomem *msix_map_region(struct pci_dev *dev, unsigned pos, 
	return ioremap_nocache(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);

	return ioremap_nocache(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);

}

}





static int msix_setup_entries(struct pci_dev *dev, unsigned pos,

				void __iomem *base, struct msix_entry *entries,

				int nvec)

{

	struct msi_desc *entry;

	int i;



	for (i = 0; i < nvec; i++) {

		entry = alloc_msi_entry(dev);

		if (!entry) {

			if (!i)

				iounmap(base);

			else

				free_msi_irqs(dev);

			/* No enough memory. Don't try again */

			return -ENOMEM;

		}



		entry->msi_attrib.is_msix	= 1;

		entry->msi_attrib.is_64		= 1;

		entry->msi_attrib.entry_nr	= entries[i].entry;

		entry->msi_attrib.default_irq	= dev->irq;

		entry->msi_attrib.pos		= pos;

		entry->mask_base		= base;



		list_add_tail(&entry->list, &dev->msi_list);

	}



	return 0;

}



static void msix_program_entries(struct pci_dev *dev,

static void msix_program_entries(struct pci_dev *dev,

					struct msix_entry *entries)

					struct msix_entry *entries)

{

{
@@ -478,8 +509,7 @@ static void msix_program_entries(struct pci_dev *dev, 
static int msix_capability_init(struct pci_dev *dev,

static int msix_capability_init(struct pci_dev *dev,

				struct msix_entry *entries, int nvec)

				struct msix_entry *entries, int nvec)

{

{

	struct msi_desc *entry;

	int pos, ret;

	int pos, i, j, ret;

	u16 control;

	u16 control;

	void __iomem *base;

	void __iomem *base;
@@ -495,27 +525,9 @@ static int msix_capability_init(struct pci_dev *dev, 
	if (!base)

	if (!base)

		return -ENOMEM;

		return -ENOMEM;





	for (i = 0; i < nvec; i++) {

	ret = msix_setup_entries(dev, pos, base, entries, nvec);

		entry = alloc_msi_entry(dev);

	if (ret)

		if (!entry) {

		return ret;

			if (!i)

				iounmap(base);

			else

				free_msi_irqs(dev);

			/* No enough memory. Don't try again */

			return -ENOMEM;

		}



 		j = entries[i].entry;

		entry->msi_attrib.is_msix = 1;

		entry->msi_attrib.is_64 = 1;

		entry->msi_attrib.entry_nr = j;

		entry->msi_attrib.default_irq = dev->irq;

		entry->msi_attrib.pos = pos;

		entry->mask_base = base;



		list_add_tail(&entry->list, &dev->msi_list);

	}





	ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);

	ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);

	if (ret)

	if (ret)
@@ -546,6 +558,7 @@ static int msix_capability_init(struct pci_dev *dev, 
		 * If we had some success, report the number of irqs

		 * If we had some success, report the number of irqs

		 * we succeeded in setting up.

		 * we succeeded in setting up.

		 */

		 */

		struct msi_desc *entry;

		int avail = 0;

		int avail = 0;





		list_for_each_entry(entry, &dev->msi_list, list) {

		list_for_each_entry(entry, &dev->msi_list, list) {