diff options
| author | Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> | 2009-08-06 06:34:34 +0400 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-09-10 00:29:33 +0400 |
| commit | 5a05a9d819a328b3aae750237909aa2097adbeec (patch) | |
| tree | 018b4d173c43e1f88c970de20612ce3d20481ae1 /drivers/pci/msi.c | |
| parent | 583871d436bea48cc2204cee0ec8eb7025e03db6 (diff) | |
| download | linux-5a05a9d819a328b3aae750237909aa2097adbeec.tar.xz | |
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>
Diffstat (limited to 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 7085d665db01..b0cc82123cc7 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -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++) { |