redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

Merge branch 'topic/yinghai-hostbridge-cleanup' into next

Browse source
This commit is contained in:
Bjorn Helgaas 2012-04-30 16:55:58 -06:00
parent 977f857ca5 c57ca65a6e
commit 29473ec23a
10 changed files with 309 additions and 272 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

120
arch/x86/pci/acpi.c
View file

@ -9,11 +9,11 @@
struct pci_root_info {
struct acpi_device *bridge;
char *name;
char name[16];
unsigned int res_num;
struct resource *res;
struct list_head *resources;
int busnum;
struct pci_sysdata sd;
};
static bool pci_use_crs = true;
@ -287,7 +287,8 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type)
}
}
static void add_resources(struct pci_root_info *info)
static void add_resources(struct pci_root_info *info,
struct list_head *resources)
{
int i;
struct resource *res, *root, *conflict;
@ -311,53 +312,74 @@ 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(info->resources, res);
pci_add_resource(resources, res);
}
}
static void
get_current_resources(struct acpi_device *device, int busnum,
int domain, struct list_head *resources)
static void free_pci_root_info_res(struct pci_root_info *info)
{
struct pci_root_info info;
size_t size;
kfree(info->res);
info->res = NULL;
info->res_num = 0;
}
info.bridge = device;
info.res_num = 0;
info.resources = resources;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
&info);
if (!info.res_num)
return;
static void __release_pci_root_info(struct pci_root_info *info)
{
int i;
struct resource *res;
size = sizeof(*info.res) * info.res_num;
info.res = kmalloc(size, GFP_KERNEL);
if (!info.res)
return;
for (i = 0; i < info->res_num; i++) {
res = &info->res[i];
info.name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum);
if (!info.name)
goto name_alloc_fail;
if (!res->parent)
continue;
info.res_num = 0;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
&info);
if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
continue;
if (pci_use_crs) {
add_resources(&info);
return;
release_resource(res);
}
kfree(info.name);
free_pci_root_info_res(info);
name_alloc_fail:
kfree(info.res);
kfree(info);
}
static void release_pci_root_info(struct pci_host_bridge *bridge)
{
struct pci_root_info *info = bridge->release_data;
__release_pci_root_info(info);
}
static void
probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
int busnum, int domain)
{
size_t size;
info->bridge = device;
info->res_num = 0;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
info);
if (!info->res_num)
return;
size = sizeof(*info->res) * info->res_num;
info->res_num = 0;
info->res = kmalloc(size, GFP_KERNEL);
if (!info->res)
return;
sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
info);
}
struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
struct pci_root_info *info = NULL;
int domain = root->segment;
int busnum = root->secondary.start;
LIST_HEAD(resources);
@ -389,17 +411,14 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
if (node != -1 && !node_online(node))
node = -1;
/* Allocate per-root-bus (not per bus) arch-specific data.
* TODO: leak; this memory is never freed.
* It's arguable whether it's worth the trouble to care.
*/
sd = kzalloc(sizeof(*sd), GFP_KERNEL);
if (!sd) {
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info) {
printk(KERN_WARNING "pci_bus %04x:%02x: "
"ignored (out of memory)\n", domain, busnum);
return NULL;
}
sd = &info->sd;
sd->domain = domain;
sd->node = node;
/*
@ -413,22 +432,32 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
* be replaced by sd.
*/
memcpy(bus->sysdata, sd, sizeof(*sd));
kfree(sd);
kfree(info);
} else {
get_current_resources(device, busnum, domain, &resources);
probe_pci_root_info(info, device, busnum, domain);
/*
* _CRS with no apertures is normal, so only fall back to
* defaults or native bridge info if we're ignoring _CRS.
*/
if (!pci_use_crs)
if (pci_use_crs)
add_resources(info, &resources);
else {
free_pci_root_info_res(info);
x86_pci_root_bus_resources(busnum, &resources);
}
bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,
&resources);
if (bus)
if (bus) {
bus->subordinate = pci_scan_child_bus(bus);
else
pci_set_host_bridge_release(
to_pci_host_bridge(bus->bridge),
release_pci_root_info, info);
} else {
pci_free_resource_list(&resources);
__release_pci_root_info(info);
}
}
/* After the PCI-E bus has been walked and all devices discovered,
@ -445,9 +474,6 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
}
}
if (!bus)
kfree(sd);
if (bus && node != -1) {
#ifdef CONFIG_ACPI_NUMA
if (pxm >= 0)

76
arch/x86/pci/amd_bus.c
View file

@ -32,6 +32,18 @@ static struct pci_hostbridge_probe pci_probes[] __initdata = {
#define RANGE_NUM 16
static struct pci_root_info __init *find_pci_root_info(int node, int link)
{
struct pci_root_info *info;
/* find the position */
list_for_each_entry(info, &pci_root_infos, list)
if (info->node == node && info->link == link)
return info;
return NULL;
}
/**
* early_fill_mp_bus_to_node()
* called before pcibios_scan_root and pci_scan_bus
@ -50,7 +62,6 @@ static int __init early_fill_mp_bus_info(void)
int def_link;
struct pci_root_info *info;
u32 reg;
struct resource *res;
u64 start;
u64 end;
struct range range[RANGE_NUM];
@ -86,7 +97,6 @@ static int __init early_fill_mp_bus_info(void)
if (!found)
return 0;
pci_root_num = 0;
for (i = 0; i < 4; i++) {
int min_bus;
int max_bus;
@ -105,13 +115,8 @@ static int __init early_fill_mp_bus_info(void)
#endif
link = (reg >> 8) & 0x03;
info = &pci_root_info[pci_root_num];
info->bus_min = min_bus;
info->bus_max = max_bus;
info->node = node;
info->link = link;
info = alloc_pci_root_info(min_bus, max_bus, node, link);
sprintf(info->name, "PCI Bus #%02x", min_bus);
pci_root_num++;
}
/* get the default node and link for left over res */
@ -134,16 +139,10 @@ static int __init early_fill_mp_bus_info(void)
link = (reg >> 4) & 0x03;
end = (reg & 0xfff000) | 0xfff;
/* find the position */
for (j = 0; j < pci_root_num; j++) {
info = &pci_root_info[j];
if (info->node == node && info->link == link)
break;
}
if (j == pci_root_num)
info = find_pci_root_info(node, link);
if (!info)
continue; /* not found */
info = &pci_root_info[j];
printk(KERN_DEBUG "node %d link %d: io port [%llx, %llx]\n",
node, link, start, end);
@ -155,13 +154,8 @@ static int __init early_fill_mp_bus_info(void)
}
/* add left over io port range to def node/link, [0, 0xffff] */
/* find the position */
for (j = 0; j < pci_root_num; j++) {
info = &pci_root_info[j];
if (info->node == def_node && info->link == def_link)
break;
}
if (j < pci_root_num) {
info = &pci_root_info[j];
info = find_pci_root_info(def_node, def_link);
if (info) {
for (i = 0; i < RANGE_NUM; i++) {
if (!range[i].end)
continue;
@ -214,16 +208,10 @@ static int __init early_fill_mp_bus_info(void)
end <<= 8;
end |= 0xffff;
/* find the position */
for (j = 0; j < pci_root_num; j++) {
info = &pci_root_info[j];
if (info->node == node && info->link == link)
break;
}
if (j == pci_root_num)
continue; /* not found */
info = find_pci_root_info(node, link);
info = &pci_root_info[j];
if (!info)
continue;
printk(KERN_DEBUG "node %d link %d: mmio [%llx, %llx]",
node, link, start, end);
@ -291,14 +279,8 @@ static int __init early_fill_mp_bus_info(void)
* add left over mmio range to def node/link ?
* that is tricky, just record range in from start_min to 4G
*/
for (j = 0; j < pci_root_num; j++) {
info = &pci_root_info[j];
if (info->node == def_node && info->link == def_link)
break;
}
if (j < pci_root_num) {
info = &pci_root_info[j];
info = find_pci_root_info(def_node, def_link);
if (info) {
for (i = 0; i < RANGE_NUM; i++) {
if (!range[i].end)
continue;
@ -309,20 +291,16 @@ static int __init early_fill_mp_bus_info(void)
}
}
for (i = 0; i < pci_root_num; i++) {
int res_num;
list_for_each_entry(info, &pci_root_infos, list) {
int busnum;
struct pci_root_res *root_res;
info = &pci_root_info[i];
res_num = info->res_num;
busnum = info->bus_min;
printk(KERN_DEBUG "bus: [%02x, %02x] on node %x link %x\n",
info->bus_min, info->bus_max, info->node, info->link);
for (j = 0; j < res_num; j++) {
res = &info->res[j];
printk(KERN_DEBUG "bus: %02x index %x %pR\n",
busnum, j, res);
}
list_for_each_entry(root_res, &info->resources, list)
printk(KERN_DEBUG "bus: %02x %pR\n",
busnum, &root_res->res);
}
return 0;

12
arch/x86/pci/broadcom_bus.c
View file

@ -22,19 +22,15 @@
static void __init cnb20le_res(u8 bus, u8 slot, u8 func)
{
struct pci_root_info *info;
struct pci_root_res *root_res;
struct resource res;
u16 word1, word2;
u8 fbus, lbus;
int i;
info = &pci_root_info[pci_root_num];
pci_root_num++;
/* read the PCI bus numbers */
fbus = read_pci_config_byte(bus, slot, func, 0x44);
lbus = read_pci_config_byte(bus, slot, func, 0x45);
info->bus_min = fbus;
info->bus_max = lbus;
info = alloc_pci_root_info(fbus, lbus, 0, 0);
/*
* Add the legacy IDE ports on bus 0
@ -86,8 +82,8 @@ static void __init cnb20le_res(u8 bus, u8 slot, u8 func)
res.flags = IORESOURCE_BUS;
printk(KERN_INFO "CNB20LE PCI Host Bridge (domain 0000 %pR)\n", &res);
for (i = 0; i < info->res_num; i++)
printk(KERN_INFO "host bridge window %pR\n", &info->res[i]);
list_for_each_entry(root_res, &info->resources, list)
printk(KERN_INFO "host bridge window %pR\n", &root_res->res);
}
static int __init broadcom_postcore_init(void)

73
arch/x86/pci/bus_numa.c
View file

@ -4,35 +4,38 @@
#include "bus_numa.h"
int pci_root_num;
struct pci_root_info pci_root_info[PCI_ROOT_NR];
LIST_HEAD(pci_root_infos);
static struct pci_root_info *x86_find_pci_root_info(int bus)
{
struct pci_root_info *info;
if (list_empty(&pci_root_infos))
return NULL;
list_for_each_entry(info, &pci_root_infos, list)
if (info->bus_min == bus)
return info;
return NULL;
}
void x86_pci_root_bus_resources(int bus, struct list_head *resources)
{
int i;
int j;
struct pci_root_info *info;
struct pci_root_info *info = x86_find_pci_root_info(bus);
struct pci_root_res *root_res;
if (!pci_root_num)
goto default_resources;
for (i = 0; i < pci_root_num; i++) {
if (pci_root_info[i].bus_min == bus)
break;
}
if (i == pci_root_num)
if (!info)
goto default_resources;
printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n",
bus);
info = &pci_root_info[i];
for (j = 0; j < info->res_num; j++) {
list_for_each_entry(root_res, &info->resources, list) {
struct resource *res;
struct resource *root;
res = &info->res[j];
res = &root_res->res;
pci_add_resource(resources, res);
if (res->flags & IORESOURCE_IO)
root = &ioport_resource;
@ -53,11 +56,32 @@ default_resources:
pci_add_resource(resources, &iomem_resource);
}
struct pci_root_info __init *alloc_pci_root_info(int bus_min, int bus_max,
int node, int link)
{
struct pci_root_info *info;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return info;
INIT_LIST_HEAD(&info->resources);
info->bus_min = bus_min;
info->bus_max = bus_max;
info->node = node;
info->link = link;
list_add_tail(&info->list, &pci_root_infos);
return info;
}
void __devinit update_res(struct pci_root_info *info, resource_size_t start,
resource_size_t end, unsigned long flags, int merge)
{
int i;
struct resource *res;
struct pci_root_res *root_res;
if (start > end)
return;
@ -69,11 +93,11 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start,
goto addit;
/* try to merge it with old one */
for (i = 0; i < info->res_num; i++) {
list_for_each_entry(root_res, &info->resources, list) {
resource_size_t final_start, final_end;
resource_size_t common_start, common_end;
res = &info->res[i];
res = &root_res->res;
if (res->flags != flags)
continue;
@ -93,14 +117,15 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start,
addit:
/* need to add that */
if (info->res_num >= RES_NUM)
root_res = kzalloc(sizeof(*root_res), GFP_KERNEL);
if (!root_res)
return;
res = &info->res[info->res_num];
res = &root_res->res;
res->name = info->name;
res->flags = flags;
res->start = start;
res->end = end;
res->child = NULL;
info->res_num++;
list_add_tail(&root_res->list, &info->resources);
}

18
arch/x86/pci/bus_numa.h
View file

@ -4,22 +4,24 @@
* sub bus (transparent) will use entres from 3 to store extra from
* root, so need to make sure we have enough slot there.
*/
#define RES_NUM 16
struct pci_root_res {
struct list_head list;
struct resource res;
};
struct pci_root_info {
struct list_head list;
char name[12];
unsigned int res_num;
struct resource res[RES_NUM];
struct list_head resources;
int bus_min;
int bus_max;
int node;
int link;
};
/* 4 at this time, it may become to 32 */
#define PCI_ROOT_NR 4
extern int pci_root_num;
extern struct pci_root_info pci_root_info[PCI_ROOT_NR];
extern struct list_head pci_root_infos;
struct pci_root_info *alloc_pci_root_info(int bus_min, int bus_max,
int node, int link);
extern void update_res(struct pci_root_info *info, resource_size_t start,
resource_size_t end, unsigned long flags, int merge);
#endif

27
arch/x86/pci/common.c
View file

@ -430,9 +430,7 @@ void __init dmi_check_pciprobe(void)
struct pci_bus * __devinit pcibios_scan_root(int busnum)
{
LIST_HEAD(resources);
struct pci_bus *bus = NULL;
struct pci_sysdata *sd;
while ((bus = pci_find_next_bus(bus)) != NULL) {
if (bus->number == busnum) {
@ -441,28 +439,10 @@ struct pci_bus * __devinit pcibios_scan_root(int busnum)
}
}
/* Allocate per-root-bus (not per bus) arch-specific data.
* TODO: leak; this memory is never freed.
* It's arguable whether it's worth the trouble to care.
*/
sd = kzalloc(sizeof(*sd), GFP_KERNEL);
if (!sd) {
printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
return NULL;
}
sd->node = get_mp_bus_to_node(busnum);
printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
x86_pci_root_bus_resources(busnum, &resources);
bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, sd, &resources);
if (!bus) {
pci_free_resource_list(&resources);
kfree(sd);
}
return bus;
return pci_scan_bus_on_node(busnum, &pci_root_ops,
get_mp_bus_to_node(busnum));
}
void __init pcibios_set_cache_line_size(void)
{
struct cpuinfo_x86 *c = &boot_cpu_data;
@ -656,6 +636,7 @@ struct pci_bus * __devinit pci_scan_bus_on_node(int busno, struct pci_ops *ops,
}
sd->node = node;
x86_pci_root_bus_resources(busno, &resources);
printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busno);
bus = pci_scan_root_bus(NULL, busno, ops, sd, &resources);
if (!bus) {
pci_free_resource_list(&resources);

2
drivers/pci/Makefile
View file

@ -2,7 +2,7 @@
# Makefile for the PCI bus specific drivers.
#
obj-y += access.o bus.o probe.o remove.o pci.o \
obj-y += access.o bus.o probe.o host-bridge.o remove.o pci.o \
pci-driver.o search.o pci-sysfs.o rom.o setup-res.o \
irq.o vpd.o
obj-$(CONFIG_PROC_FS) += proc.o

96
drivers/pci/host-bridge.c Normal file
View file

@ -0,0 +1,96 @@
/*
* host bridge related code
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/module.h>
#include "pci.h"
static struct pci_bus *find_pci_root_bus(struct pci_dev *dev)
{
struct pci_bus *bus;
bus = dev->bus;
while (bus->parent)
bus = bus->parent;
return bus;
}
static struct pci_host_bridge *find_pci_host_bridge(struct pci_dev *dev)
{
struct pci_bus *bus = find_pci_root_bus(dev);
return to_pci_host_bridge(bus->bridge);
}
void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
void (*release_fn)(struct pci_host_bridge *),
void *release_data)
{
bridge->release_fn = release_fn;
bridge->release_data = release_data;
}
static bool resource_contains(struct resource *res1, struct resource *res2)
{
return res1->start <= res2->start && res1->end >= res2->end;
}
void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
struct resource *res)
{
struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
struct pci_host_bridge_window *window;
resource_size_t offset = 0;
list_for_each_entry(window, &bridge->windows, list) {
if (resource_type(res) != resource_type(window->res))
continue;
if (resource_contains(window->res, res)) {
offset = window->offset;
break;
}
}
region->start = res->start - offset;
region->end = res->end - offset;
}
EXPORT_SYMBOL(pcibios_resource_to_bus);
static bool region_contains(struct pci_bus_region *region1,
struct pci_bus_region *region2)
{
return region1->start <= region2->start && region1->end >= region2->end;
}
void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
struct pci_bus_region *region)
{
struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
struct pci_host_bridge_window *window;
resource_size_t offset = 0;
list_for_each_entry(window, &bridge->windows, list) {
struct pci_bus_region bus_region;
if (resource_type(res) != resource_type(window->res))
continue;
bus_region.start = window->res->start - window->offset;
bus_region.end = window->res->end - window->offset;
if (region_contains(&bus_region, region)) {
offset = window->offset;
break;
}
}
res->start = region->start + offset;
res->end = region->end + offset;
}
EXPORT_SYMBOL(pcibios_bus_to_resource);

148
drivers/pci/probe.c
View file

@ -15,13 +15,10 @@
#define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */
#define CARDBUS_RESERVE_BUSNR 3
static LIST_HEAD(pci_host_bridges);
/* Ugh. Need to stop exporting this to modules. */
LIST_HEAD(pci_root_buses);
EXPORT_SYMBOL(pci_root_buses);
static int find_anything(struct device *dev, void *data)
{
return 1;
@ -44,82 +41,6 @@ int no_pci_devices(void)
}
EXPORT_SYMBOL(no_pci_devices);
static struct pci_host_bridge *pci_host_bridge(struct pci_dev *dev)
{
struct pci_bus *bus;
struct pci_host_bridge *bridge;
bus = dev->bus;
while (bus->parent)
bus = bus->parent;
list_for_each_entry(bridge, &pci_host_bridges, list) {
if (bridge->bus == bus)
return bridge;
}
return NULL;
}
static bool resource_contains(struct resource *res1, struct resource *res2)
{
return res1->start <= res2->start && res1->end >= res2->end;
}
void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
struct resource *res)
{
struct pci_host_bridge *bridge = pci_host_bridge(dev);
struct pci_host_bridge_window *window;
resource_size_t offset = 0;
list_for_each_entry(window, &bridge->windows, list) {
if (resource_type(res) != resource_type(window->res))
continue;
if (resource_contains(window->res, res)) {
offset = window->offset;
break;
}
}
region->start = res->start - offset;
region->end = res->end - offset;
}
EXPORT_SYMBOL(pcibios_resource_to_bus);
static bool region_contains(struct pci_bus_region *region1,
struct pci_bus_region *region2)
{
return region1->start <= region2->start && region1->end >= region2->end;
}
void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
struct pci_bus_region *region)
{
struct pci_host_bridge *bridge = pci_host_bridge(dev);
struct pci_host_bridge_window *window;
struct pci_bus_region bus_region;
resource_size_t offset = 0;
list_for_each_entry(window, &bridge->windows, list) {
if (resource_type(res) != resource_type(window->res))
continue;
bus_region.start = window->res->start - window->offset;
bus_region.end = window->res->end - window->offset;
if (region_contains(&bus_region, region)) {
offset = window->offset;
break;
}
}
res->start = region->start + offset;
res->end = region->end + offset;
}
EXPORT_SYMBOL(pcibios_bus_to_resource);
/*
* PCI Bus Class
*/
@ -501,6 +422,19 @@ static struct pci_bus * pci_alloc_bus(void)
return b;
}
static struct pci_host_bridge *pci_alloc_host_bridge(struct pci_bus *b)
{
struct pci_host_bridge *bridge;
bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
if (bridge) {
INIT_LIST_HEAD(&bridge->windows);
bridge->bus = b;
}
return bridge;
}
static unsigned char pcix_bus_speed[] = {
PCI_SPEED_UNKNOWN, /* 0 */
PCI_SPEED_66MHz_PCIX, /* 1 */
@ -1201,7 +1135,14 @@ int pci_cfg_space_size(struct pci_dev *dev)
static void pci_release_bus_bridge_dev(struct device *dev)
{
kfree(dev);
struct pci_host_bridge *bridge = to_pci_host_bridge(dev);
if (bridge->release_fn)
bridge->release_fn(bridge);
pci_free_resource_list(&bridge->windows);
kfree(bridge);
}
struct pci_dev *alloc_pci_dev(void)
@ -1650,28 +1591,19 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
int error;
struct pci_host_bridge *bridge;
struct pci_bus *b, *b2;
struct device *dev;
struct pci_host_bridge_window *window, *n;
struct resource *res;
resource_size_t offset;
char bus_addr[64];
char *fmt;
bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
if (!bridge)
return NULL;
b = pci_alloc_bus();
if (!b)
goto err_bus;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
goto err_dev;
return NULL;
b->sysdata = sysdata;
b->ops = ops;
b2 = pci_find_bus(pci_domain_nr(b), bus);
if (b2) {
/* If we already got to this bus through a different bridge, ignore it */
@ -1679,13 +1611,17 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
goto err_out;
}
dev->parent = parent;
dev->release = pci_release_bus_bridge_dev;
dev_set_name(dev, "pci%04x:%02x", pci_domain_nr(b), bus);
error = device_register(dev);
bridge = pci_alloc_host_bridge(b);
if (!bridge)
goto err_out;
bridge->dev.parent = parent;
bridge->dev.release = pci_release_bus_bridge_dev;
dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus);
error = device_register(&bridge->dev);
if (error)
goto dev_reg_err;
b->bridge = get_device(dev);
goto bridge_dev_reg_err;
b->bridge = get_device(&bridge->dev);
device_enable_async_suspend(b->bridge);
pci_set_bus_of_node(b);
@ -1704,9 +1640,6 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
b->number = b->secondary = bus;
bridge->bus = b;
INIT_LIST_HEAD(&bridge->windows);
if (parent)
dev_info(parent, "PCI host bridge to bus %s\n", dev_name(&b->dev));
else
@ -1732,25 +1665,18 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
}
down_write(&pci_bus_sem);
list_add_tail(&bridge->list, &pci_host_bridges);
list_add_tail(&b->node, &pci_root_buses);
up_write(&pci_bus_sem);
return b;
class_dev_reg_err:
device_unregister(dev);
dev_reg_err:
down_write(&pci_bus_sem);
list_del(&bridge->list);
list_del(&b->node);
up_write(&pci_bus_sem);
err_out:
kfree(dev);
err_dev:
kfree(b);
err_bus:
put_device(&bridge->dev);
device_unregister(&bridge->dev);
bridge_dev_reg_err:
kfree(bridge);
err_out:
kfree(b);
return NULL;
}

9
include/linux/pci.h
View file

@ -375,11 +375,18 @@ struct pci_host_bridge_window {
};
struct pci_host_bridge {
struct list_head list;
struct device dev;
struct pci_bus *bus; /* root bus */
struct list_head windows; /* pci_host_bridge_windows */
void (*release_fn)(struct pci_host_bridge *);
void *release_data;
};
#define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
void (*release_fn)(struct pci_host_bridge *),
void *release_data);
/*
* The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
* to P2P or CardBus bridge windows) go in a table. Additional ones (for