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| author | Matthew Wilcox <matthew@wil.cx> | 2006-10-10 08:01:21 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-12-01 14:36:57 -0800 |
| commit | edb2d97eb57b7a21c9256260562de6a65dda86cc (patch) | |
| tree | c07b98d0e14256e6a91709c39e55074d5ffcc05e /drivers/pci | |
| parent | ebf5a24829def5d066922ceebde61dd57fdc6b1e (diff) | |
| download | linux-stable-edb2d97eb57b7a21c9256260562de6a65dda86cc.tar.gz linux-stable-edb2d97eb57b7a21c9256260562de6a65dda86cc.tar.bz2 linux-stable-edb2d97eb57b7a21c9256260562de6a65dda86cc.zip | |
PCI: Replace HAVE_ARCH_PCI_MWI with PCI_DISABLE_MWI
pSeries is the only architecture left using HAVE_ARCH_PCI_MWI and it's
really inappropriate for its needs. It really wants to disable MWI
altogether. So here are a pair of stub implementations for pci_set_mwi
and pci_clear_mwi.
Also rename pci_generic_prep_mwi to pci_set_cacheline_size since that
better reflects what it does.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index bc88c30a418b..427991741cf3 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -875,7 +875,17 @@ pci_set_master(struct pci_dev *dev) pcibios_set_master(dev); } -#ifndef HAVE_ARCH_PCI_MWI +#ifdef PCI_DISABLE_MWI +int pci_set_mwi(struct pci_dev *dev) +{ + return 0; +} + +void pci_clear_mwi(struct pci_dev *dev) +{ +} + +#else #ifndef PCI_CACHE_LINE_BYTES #define PCI_CACHE_LINE_BYTES L1_CACHE_BYTES @@ -886,17 +896,17 @@ pci_set_master(struct pci_dev *dev) u8 pci_cache_line_size = PCI_CACHE_LINE_BYTES / 4; /** - * pci_generic_prep_mwi - helper function for pci_set_mwi - * @dev: the PCI device for which MWI is enabled + * pci_set_cacheline_size - ensure the CACHE_LINE_SIZE register is programmed + * @dev: the PCI device for which MWI is to be enabled * - * Helper function for generic implementation of pcibios_prep_mwi - * function. Originally copied from drivers/net/acenic.c. + * Helper function for pci_set_mwi. + * Originally copied from drivers/net/acenic.c. * Copyright 1998-2001 by Jes Sorensen, <jes@trained-monkey.org>. * * RETURNS: An appropriate -ERRNO error value on error, or zero for success. */ static int -pci_generic_prep_mwi(struct pci_dev *dev) +pci_set_cacheline_size(struct pci_dev *dev) { u8 cacheline_size; @@ -922,7 +932,6 @@ pci_generic_prep_mwi(struct pci_dev *dev) return -EINVAL; } -#endif /* !HAVE_ARCH_PCI_MWI */ /** * pci_set_mwi - enables memory-write-invalidate PCI transaction @@ -940,12 +949,7 @@ pci_set_mwi(struct pci_dev *dev) int rc; u16 cmd; -#ifdef HAVE_ARCH_PCI_MWI - rc = pcibios_prep_mwi(dev); -#else - rc = pci_generic_prep_mwi(dev); -#endif - + rc = pci_set_cacheline_size(dev); if (rc) return rc; @@ -976,6 +980,7 @@ pci_clear_mwi(struct pci_dev *dev) pci_write_config_word(dev, PCI_COMMAND, cmd); } } +#endif /* ! PCI_DISABLE_MWI */ /** * pci_intx - enables/disables PCI INTx for device dev |