On 14.10.2015 08:29, Jiang Liu wrote:
Introduce common interface acpi_pci_root_create() and related data
structures to create PCI root bus for ACPI PCI host bridges. It will
be used to kill duplicated arch specific code for IA64 and x86. It may
also help ARM64 in future.
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Tested-by: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Signed-off-by: Liu Jiang <jiang.liu@xxxxxxxxxxxxxxx>
---
drivers/acpi/pci_root.c | 204 ++++++++++++++++++++++++++++++++++++++++++++++
include/linux/pci-acpi.h | 24 ++++++
2 files changed, 228 insertions(+)
[...]
+
+struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
+ struct acpi_pci_root_ops *ops,
+ struct acpi_pci_root_info *info,
+ void *sysdata)
+{
+ int ret, busnum = root->secondary.start;
+ struct acpi_device *device = root->device;
+ int node = acpi_get_node(device->handle);
+ struct pci_bus *bus;
+
+ info->root = root;
+ info->bridge = device;
+ info->ops = ops;
+ INIT_LIST_HEAD(&info->resources);
+ snprintf(info->name, sizeof(info->name), "PCI Bus %04x:%02x",
+ root->segment, busnum);
+
+ if (ops->init_info && ops->init_info(info))
+ goto out_release_info;
+ if (ops->prepare_resources)
+ ret = ops->prepare_resources(info);
+ else
+ ret = acpi_pci_probe_root_resources(info);
+ if (ret < 0)
+ goto out_release_info;
+
+ pci_acpi_root_add_resources(info);
+ pci_add_resource(&info->resources, &root->secondary);
+ bus = pci_create_root_bus(NULL, busnum, ops->pci_ops,
+ sysdata, &info->resources);
Thank a lot for this cleanup!!
I recall you already considered passing segment (domain nr) to
pci_create_root_bus, right? Can you please remind me why we gave up on this?
I am asking because currently I can not find the way to retrieve domain
number from pci_bus_assign_domain_nr (for those platforms which choose
PCI_DOMAINS_GENERIC and want to use segment nr from MCFG table) which is
the part of pci_create_root_bus.
Regards,
Tomasz
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
