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| author |   Matthew Wilcox <willy@linux.intel.com> | 2009-03-17 08:54:09 -0400 |
|---|---|---|
| committer |   Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-03-20 10:48:13 -0700 |
| commit | f2440d9acbe866b917b16cc0f927366341ce9215 (patch) | |
| tree | ed868ca5b61fcadaf782f85c9a900b06e77fc3ce /include/linux/msi.h | |
| parent | PCI MSI: Use mask_pos instead of mask_base when appropriate (diff) | |
| download | linux-dev-f2440d9acbe866b917b16cc0f927366341ce9215.tar.xz linux-dev-f2440d9acbe866b917b16cc0f927366341ce9215.zip | |
PCI MSI: Refactor interrupt masking code
Since most of the callers already know whether they have an MSI or
an MSI-X capability, split msi_set_mask_bits() into msi_mask_irq()
and msix_mask_irq(). The only callers which don't (mask_msi_irq()
and unmask_msi_irq()) can share code in msi_set_mask_bit(). This then
becomes the only caller of msix_flush_writes(), so we can inline it.
The flushing read can be to any address that belongs to the device,
so we can eliminate the calculation too.
We can also get rid of maskbits_mask from struct msi_desc and simply
recalculate it on the rare occasion that we need it. The single-bit
'masked' element is replaced by a copy of the 32-bit 'masked' register,
so this patch does not affect the size of msi_desc.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'include/linux/msi.h')
| -rw-r--r-- | include/linux/msi.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index 5025ca4d91e4..37c1bbe546e5 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -22,14 +22,13 @@ struct msi_desc { struct { __u8 is_msix : 1; __u8 maskbit : 1; /* mask-pending bit supported ? */ - __u8 masked : 1; __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ __u8 pos; /* Location of the msi capability */ __u16 entry_nr; /* specific enabled entry */ - __u32 maskbits_mask; /* mask bits mask */ unsigned default_irq; /* default pre-assigned irq */ - }msi_attrib; + } msi_attrib; + u32 masked; /* mask bits */ unsigned int irq; struct list_head list; |