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PCI/IA64: introduce probe_pci_root_info() to manage _CRS resource

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Currently, initialize _CRS resource code in IA64 make pci_acpi_scan_root()
some lengthiness. Introduce probe_pci_root_info() to manage it like in X86,

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Yijing Wang 2013-06-06 15:34:52 +08:00 committed by Tony Luck
parent 2932239fb4
commit 3a72af09bc
1 changed files with 57 additions and 43 deletions
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100
arch/ia64/pci/pci.c
View file

@ -376,6 +376,50 @@ static void release_pci_root_info(struct pci_host_bridge *bridge)
__release_pci_root_info(info);
}
static int
probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
int busnum, int domain)
{
char *name;
name = kmalloc(16, GFP_KERNEL);
if (!name)
return -ENOMEM;
sprintf(name, "PCI Bus %04x:%02x", domain, busnum);
info->bridge = device;
info->name = name;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window,
&info->res_num);
if (info->res_num) {
info->res =
kzalloc_node(sizeof(*info->res) * info->res_num,
GFP_KERNEL, info->controller->node);
if (!info->res) {
kfree(name);
return -ENOMEM;
}
info->res_offset =
kzalloc_node(sizeof(*info->res_offset) * info->res_num,
GFP_KERNEL, info->controller->node);
if (!info->res_offset) {
kfree(name);
kfree(info->res);
info->res = NULL;
return -ENOMEM;
}
info->res_num = 0;
acpi_walk_resources(device->handle, METHOD_NAME__CRS,
add_window, info);
} else
kfree(name);
return 0;
}
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
@ -385,12 +429,11 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
struct pci_root_info *info = NULL;
int busnum = root->secondary.start;
struct pci_bus *pbus;
char *name;
int pxm;
int pxm, ret;
controller = alloc_pci_controller(domain);
if (!controller)
goto out1;
return NULL;
controller->acpi_handle = device->handle;
@ -404,41 +447,23 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
if (!info) {
printk(KERN_WARNING
"pci_bus %04x:%02x: ignored (out of memory)\n",
root->segment, busnum);
goto out2;
domain, busnum);
kfree(controller);
return NULL;
}
info->controller = controller;
INIT_LIST_HEAD(&info->io_resources);
INIT_LIST_HEAD(&info->resources);
ret = probe_pci_root_info(info, device, busnum, domain);
if (ret) {
kfree(info->controller);
kfree(info);
return NULL;
}
/* insert busn resource at first */
pci_add_resource(&info->resources, &root->secondary);
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window,
&info->res_num);
if (info->res_num) {
info->res =
kzalloc_node(sizeof(*info->res) * info->res_num,
GFP_KERNEL, controller->node);
if (!info->res)
goto out3;
info->res_offset =
kzalloc_node(sizeof(*info->res_offset) * info->res_num,
GFP_KERNEL, controller->node);
if (!info->res_offset)
goto out4;
name = kmalloc(16, GFP_KERNEL);
if (!name)
goto out5;
sprintf(name, "PCI Bus %04x:%02x", domain, bus);
info->bridge = device;
info->controller = controller;
info->name = name;
info->res_num = 0;
acpi_walk_resources(device->handle, METHOD_NAME__CRS,
add_window, info);
}
/*
* See arch/x86/pci/acpi.c.
* The desired pci bus might already be scanned in a quirk. We
@ -457,17 +482,6 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
release_pci_root_info, info);
pci_scan_child_bus(pbus);
return pbus;
out5:
kfree(info->res_offset);
out4:
kfree(info->res);
out3:
kfree(info);
out2:
kfree(controller);
out1:
return NULL;
}
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)