diff options
| author | Mike Yoknis <mike.yoknis@hp.com> | 2012-11-07 15:52:20 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-11-07 15:52:20 -0700 |
| commit | b4873931cc8c934a9893d5962bde97aca23be983 (patch) | |
| tree | f78f75073bb64a52c9f141dfe1715af75d89aa3c /arch/x86/pci | |
| parent | 8f0d8163b50e01f398b14bcd4dc039ac5ab18d64 (diff) | |
x86/PCI: Allow x86 platforms to use translation offsets
The memory range descriptors in the _CRS control method contain an address
translation offset for host bridges. This value is used to translate
addresses across the bridge. The support to use _TRA values is present for
other architectures but not for X86 platforms.
For existing X86 platforms the _TRA value is zero. Non-zero _TRA values
are expected on future X86 platforms. This change will register that value
with the resource.
Signed-off-by: Mike Yoknis <mike.yoknis@hp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/acpi.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index 192397c98606..9cecffc72e63 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -12,6 +12,7 @@ struct pci_root_info { char name[16]; unsigned int res_num; struct resource *res; + resource_size_t *res_offset; struct pci_sysdata sd; #ifdef CONFIG_PCI_MMCONFIG bool mcfg_added; @@ -305,6 +306,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data) res->flags = flags; res->start = start; res->end = end; + info->res_offset[info->res_num] = addr.translation_offset; if (!pci_use_crs) { dev_printk(KERN_DEBUG, &info->bridge->dev, @@ -374,7 +376,8 @@ static void add_resources(struct pci_root_info *info, "ignoring host bridge window %pR (conflicts with %s %pR)\n", res, conflict->name, conflict); else - pci_add_resource(resources, res); + pci_add_resource_offset(resources, res, + info->res_offset[i]); } } @@ -382,6 +385,8 @@ static void free_pci_root_info_res(struct pci_root_info *info) { kfree(info->res); info->res = NULL; + kfree(info->res_offset); + info->res_offset = NULL; info->res_num = 0; } @@ -432,10 +437,20 @@ probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device, return; size = sizeof(*info->res) * info->res_num; - info->res_num = 0; info->res = kzalloc(size, GFP_KERNEL); - if (!info->res) + if (!info->res) { + info->res_num = 0; + return; + } + + size = sizeof(*info->res_offset) * info->res_num; + info->res_num = 0; + info->res_offset = kzalloc(size, GFP_KERNEL); + if (!info->res_offset) { + kfree(info->res); + info->res = NULL; return; + } acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, info); |