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PCI MSI: MSI-X cleanup, msix_setup_entries() 

Cleanup based on the prototype from Matthew Milcox.

Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Hidetoshi Seto 2009-08-06 11:35:48 +09:00 committed by Jesse Barnes
parent 75cb342687
commit d9d7070e61
1 changed files with 36 additions and 23 deletions
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59
drivers/pci/msi.c
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@ -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);
}
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,
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,
struct msix_entry *entries, int nvec)
{
struct msi_desc *entry;
int pos, i, j, ret;
int pos, ret;
u16 control;
void __iomem *base;
@ -495,27 +525,9 @@ static int msix_capability_init(struct pci_dev *dev,
if (!base)
return -ENOMEM;
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;
}
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 = msix_setup_entries(dev, pos, base, entries, nvec);
if (ret)
return ret;
ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
if (ret)
@ -546,6 +558,7 @@ error:
* If we had some success, report the number of irqs
* we succeeded in setting up.
*/
struct msi_desc *entry;
int avail = 0;
list_for_each_entry(entry, &dev->msi_list, list) {