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PCI MSI: MSI-X cleanup, msix_map_region() 

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 11:34:34 +09:00 committed by Jesse Barnes
parent 583871d436
commit 5a05a9d819
1 changed files with 19 additions and 13 deletions
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32
drivers/pci/msi.c
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@ -432,6 +432,21 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
return 0;
}
static void __iomem *msix_map_region(struct pci_dev *dev, unsigned pos,
unsigned nr_entries)
{
unsigned long phys_addr;
u32 table_offset;
u8 bir;
pci_read_config_dword(dev, msix_table_offset_reg(pos), &table_offset);
bir = (u8)(table_offset & PCI_MSIX_FLAGS_BIRMASK);
table_offset &= ~PCI_MSIX_FLAGS_BIRMASK;
phys_addr = pci_resource_start(dev, bir) + table_offset;
return ioremap_nocache(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
}
/**
* msix_capability_init - configure device's MSI-X capability
* @dev: pointer to the pci_dev data structure of MSI-X device function
@ -446,11 +461,8 @@ static int msix_capability_init(struct pci_dev *dev,
struct msix_entry *entries, int nvec)
{
struct msi_desc *entry;
int pos, i, j, nr_entries, ret;
unsigned long phys_addr;
u32 table_offset;
u16 control;
u8 bir;
int pos, i, j, ret;
u16 control;
void __iomem *base;
pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
@ -461,14 +473,8 @@ static int msix_capability_init(struct pci_dev *dev,
pci_write_config_word(dev, pos + PCI_MSIX_FLAGS, control);
/* Request & Map MSI-X table region */
nr_entries = multi_msix_capable(control);
pci_read_config_dword(dev, msix_table_offset_reg(pos), &table_offset);
bir = (u8)(table_offset & PCI_MSIX_FLAGS_BIRMASK);
table_offset &= ~PCI_MSIX_FLAGS_BIRMASK;
phys_addr = pci_resource_start (dev, bir) + table_offset;
base = ioremap_nocache(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
if (base == NULL)
base = msix_map_region(dev, pos, multi_msix_capable(control));
if (!base)
return -ENOMEM;
for (i = 0; i < nvec; i++) {