| Date | Wed, 9 Jul 2008 18:49:17 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 11/34] AMD IOMMU: add functions for IOMMU hardware initialization from ACPI |
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On Thu, 26 Jun 2008 21:27:47 +0200 Joerg Roedel <joerg.roedel@amd.com> wrote:
> This patch adds functions to initialize the IOMMU hardware with information > from ACPI and PCI. > > Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> > --- > arch/x86/kernel/amd_iommu_init.c | 125 ++++++++++++++++++++++++++++++++++++++ > 1 files changed, 125 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c > index 4c37abb..8ec48f1 100644 > --- a/arch/x86/kernel/amd_iommu_init.c > +++ b/arch/x86/kernel/amd_iommu_init.c > @@ -353,3 +353,128 @@ static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m) > } > } > > +static void __init init_iommu_from_pci(struct amd_iommu *iommu) > +{ > + int bus = PCI_BUS(iommu->devid); > + int dev = PCI_SLOT(iommu->devid); > + int fn = PCI_FUNC(iommu->devid); > + int cap_ptr = iommu->cap_ptr; > + u32 range; > + > + iommu->cap = read_pci_config(bus, dev, fn, cap_ptr+MMIO_CAP_HDR_OFFSET); > + > + range = read_pci_config(bus, dev, fn, cap_ptr+MMIO_RANGE_OFFSET); > + iommu->first_device = DEVID(MMIO_GET_BUS(range), MMIO_GET_FD(range)); > + iommu->last_device = DEVID(MMIO_GET_BUS(range), MMIO_GET_LD(range)); > +} > + > +static void __init init_iommu_from_acpi(struct amd_iommu *iommu, > + struct ivhd_header *h) > +{ > + u8 *p = (u8 *)h; > + u8 *end = p, flags = 0; > + u16 dev_i, devid = 0, devid_start = 0, devid_to = 0; > + u32 ext_flags = 0; > + bool alias = 0;
Using `false' would be more conventional.
> + alias = 1;
`true'.
etc.
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