forked from mirrors/linux
x86/PCI/ACPI: Use common ACPI resource interfaces to simplify implementation
Use common ACPI resource discovery interfaces to simplify PCI host bridge resource enumeration. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jiang Liu
Rafael J. Wysocki
parent
812dbd9994
commit
593669c2ac
1 changed files with 94 additions and 207 deletions
|
|
@ -10,9 +10,6 @@
|
|||
struct pci_root_info {
|
||||
struct acpi_device *bridge;
|
||||
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;
|
||||
|
|
@ -218,132 +215,41 @@ static void teardown_mcfg_map(struct pci_root_info *info)
|
|||
}
|
||||
#endif
|
||||
|
||||
static acpi_status resource_to_addr(struct acpi_resource *resource,
|
||||
struct acpi_resource_address64 *addr)
|
||||
static void validate_resources(struct device *dev, struct list_head *crs_res,
|
||||
unsigned long type)
|
||||
{
|
||||
acpi_status status;
|
||||
struct acpi_resource_memory24 *memory24;
|
||||
struct acpi_resource_memory32 *memory32;
|
||||
struct acpi_resource_fixed_memory32 *fixed_memory32;
|
||||
LIST_HEAD(list);
|
||||
struct resource *res1, *res2, *root = NULL;
|
||||
struct resource_entry *tmp, *entry, *entry2;
|
||||
|
||||
memset(addr, 0, sizeof(*addr));
|
||||
switch (resource->type) {
|
||||
case ACPI_RESOURCE_TYPE_MEMORY24:
|
||||
memory24 = &resource->data.memory24;
|
||||
addr->resource_type = ACPI_MEMORY_RANGE;
|
||||
addr->address.minimum = memory24->minimum;
|
||||
addr->address.address_length = memory24->address_length;
|
||||
addr->address.maximum = addr->address.minimum + addr->address.address_length - 1;
|
||||
return AE_OK;
|
||||
case ACPI_RESOURCE_TYPE_MEMORY32:
|
||||
memory32 = &resource->data.memory32;
|
||||
addr->resource_type = ACPI_MEMORY_RANGE;
|
||||
addr->address.minimum = memory32->minimum;
|
||||
addr->address.address_length = memory32->address_length;
|
||||
addr->address.maximum = addr->address.minimum + addr->address.address_length - 1;
|
||||
return AE_OK;
|
||||
case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
|
||||
fixed_memory32 = &resource->data.fixed_memory32;
|
||||
addr->resource_type = ACPI_MEMORY_RANGE;
|
||||
addr->address.minimum = fixed_memory32->address;
|
||||
addr->address.address_length = fixed_memory32->address_length;
|
||||
addr->address.maximum = addr->address.minimum + addr->address.address_length - 1;
|
||||
return AE_OK;
|
||||
case ACPI_RESOURCE_TYPE_ADDRESS16:
|
||||
case ACPI_RESOURCE_TYPE_ADDRESS32:
|
||||
case ACPI_RESOURCE_TYPE_ADDRESS64:
|
||||
status = acpi_resource_to_address64(resource, addr);
|
||||
if (ACPI_SUCCESS(status) &&
|
||||
(addr->resource_type == ACPI_MEMORY_RANGE ||
|
||||
addr->resource_type == ACPI_IO_RANGE) &&
|
||||
addr->address.address_length > 0) {
|
||||
return AE_OK;
|
||||
}
|
||||
break;
|
||||
}
|
||||
return AE_ERROR;
|
||||
}
|
||||
BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
|
||||
root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
|
||||
|
||||
static acpi_status count_resource(struct acpi_resource *acpi_res, void *data)
|
||||
{
|
||||
struct pci_root_info *info = data;
|
||||
struct acpi_resource_address64 addr;
|
||||
acpi_status status;
|
||||
list_splice_init(crs_res, &list);
|
||||
resource_list_for_each_entry_safe(entry, tmp, &list) {
|
||||
bool free = false;
|
||||
resource_size_t end;
|
||||
|
||||
status = resource_to_addr(acpi_res, &addr);
|
||||
if (ACPI_SUCCESS(status))
|
||||
info->res_num++;
|
||||
return AE_OK;
|
||||
}
|
||||
|
||||
static acpi_status setup_resource(struct acpi_resource *acpi_res, void *data)
|
||||
{
|
||||
struct pci_root_info *info = data;
|
||||
struct resource *res;
|
||||
struct acpi_resource_address64 addr;
|
||||
acpi_status status;
|
||||
unsigned long flags;
|
||||
u64 start, orig_end, end, res_end;
|
||||
|
||||
status = resource_to_addr(acpi_res, &addr);
|
||||
if (!ACPI_SUCCESS(status))
|
||||
return AE_OK;
|
||||
|
||||
if (addr.resource_type == ACPI_MEMORY_RANGE) {
|
||||
flags = IORESOURCE_MEM;
|
||||
if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
|
||||
flags |= IORESOURCE_PREFETCH;
|
||||
res_end = (u64)iomem_resource.end;
|
||||
} else if (addr.resource_type == ACPI_IO_RANGE) {
|
||||
flags = IORESOURCE_IO;
|
||||
res_end = (u64)ioport_resource.end;
|
||||
} else
|
||||
return AE_OK;
|
||||
|
||||
start = addr.address.minimum + addr.address.translation_offset;
|
||||
orig_end = end = addr.address.maximum + addr.address.translation_offset;
|
||||
|
||||
/* Exclude non-addressable range or non-addressable portion of range */
|
||||
end = min(end, res_end);
|
||||
if (end <= start) {
|
||||
dev_info(&info->bridge->dev,
|
||||
"host bridge window [%#llx-%#llx] "
|
||||
"(ignored, not CPU addressable)\n", start, orig_end);
|
||||
return AE_OK;
|
||||
} else if (orig_end != end) {
|
||||
dev_info(&info->bridge->dev,
|
||||
"host bridge window [%#llx-%#llx] "
|
||||
"([%#llx-%#llx] ignored, not CPU addressable)\n",
|
||||
start, orig_end, end + 1, orig_end);
|
||||
}
|
||||
|
||||
res = &info->res[info->res_num];
|
||||
res->name = info->name;
|
||||
res->flags = flags;
|
||||
res->start = start;
|
||||
res->end = end;
|
||||
info->res_offset[info->res_num] = addr.address.translation_offset;
|
||||
info->res_num++;
|
||||
|
||||
if (!pci_use_crs)
|
||||
dev_printk(KERN_DEBUG, &info->bridge->dev,
|
||||
"host bridge window %pR (ignored)\n", res);
|
||||
|
||||
return AE_OK;
|
||||
}
|
||||
|
||||
static void coalesce_windows(struct pci_root_info *info, unsigned long type)
|
||||
{
|
||||
int i, j;
|
||||
struct resource *res1, *res2;
|
||||
|
||||
for (i = 0; i < info->res_num; i++) {
|
||||
res1 = &info->res[i];
|
||||
res1 = entry->res;
|
||||
if (!(res1->flags & type))
|
||||
continue;
|
||||
goto next;
|
||||
|
||||
for (j = i + 1; j < info->res_num; j++) {
|
||||
res2 = &info->res[j];
|
||||
/* Exclude non-addressable range or non-addressable portion */
|
||||
end = min(res1->end, root->end);
|
||||
if (end <= res1->start) {
|
||||
dev_info(dev, "host bridge window %pR (ignored, not CPU addressable)\n",
|
||||
res1);
|
||||
free = true;
|
||||
goto next;
|
||||
} else if (res1->end != end) {
|
||||
dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable)\n",
|
||||
res1, (unsigned long long)end + 1,
|
||||
(unsigned long long)res1->end);
|
||||
res1->end = end;
|
||||
}
|
||||
|
||||
resource_list_for_each_entry(entry2, crs_res) {
|
||||
res2 = entry2->res;
|
||||
if (!(res2->flags & type))
|
||||
continue;
|
||||
|
||||
|
|
@ -355,118 +261,92 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type)
|
|||
if (resource_overlaps(res1, res2)) {
|
||||
res2->start = min(res1->start, res2->start);
|
||||
res2->end = max(res1->end, res2->end);
|
||||
dev_info(&info->bridge->dev,
|
||||
"host bridge window expanded to %pR; %pR ignored\n",
|
||||
dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
|
||||
res2, res1);
|
||||
res1->flags = 0;
|
||||
free = true;
|
||||
goto next;
|
||||
}
|
||||
}
|
||||
|
||||
next:
|
||||
resource_list_del(entry);
|
||||
if (free)
|
||||
resource_list_free_entry(entry);
|
||||
else
|
||||
resource_list_add_tail(entry, crs_res);
|
||||
}
|
||||
}
|
||||
|
||||
static void add_resources(struct pci_root_info *info,
|
||||
struct list_head *resources)
|
||||
struct list_head *resources,
|
||||
struct list_head *crs_res)
|
||||
{
|
||||
int i;
|
||||
struct resource *res, *root, *conflict;
|
||||
struct resource_entry *entry, *tmp;
|
||||
struct resource *res, *conflict, *root = NULL;
|
||||
|
||||
coalesce_windows(info, IORESOURCE_MEM);
|
||||
coalesce_windows(info, IORESOURCE_IO);
|
||||
|
||||
for (i = 0; i < info->res_num; i++) {
|
||||
res = &info->res[i];
|
||||
validate_resources(&info->bridge->dev, crs_res, IORESOURCE_MEM);
|
||||
validate_resources(&info->bridge->dev, crs_res, IORESOURCE_IO);
|
||||
|
||||
resource_list_for_each_entry_safe(entry, tmp, crs_res) {
|
||||
res = entry->res;
|
||||
if (res->flags & IORESOURCE_MEM)
|
||||
root = &iomem_resource;
|
||||
else if (res->flags & IORESOURCE_IO)
|
||||
root = &ioport_resource;
|
||||
else
|
||||
continue;
|
||||
BUG_ON(res);
|
||||
|
||||
conflict = insert_resource_conflict(root, res);
|
||||
if (conflict)
|
||||
if (conflict) {
|
||||
dev_info(&info->bridge->dev,
|
||||
"ignoring host bridge window %pR (conflicts with %s %pR)\n",
|
||||
res, conflict->name, conflict);
|
||||
else
|
||||
pci_add_resource_offset(resources, res,
|
||||
info->res_offset[i]);
|
||||
}
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
static void __release_pci_root_info(struct pci_root_info *info)
|
||||
{
|
||||
int i;
|
||||
struct resource *res;
|
||||
|
||||
for (i = 0; i < info->res_num; i++) {
|
||||
res = &info->res[i];
|
||||
|
||||
if (!res->parent)
|
||||
continue;
|
||||
|
||||
if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
|
||||
continue;
|
||||
|
||||
release_resource(res);
|
||||
resource_list_destroy_entry(entry);
|
||||
}
|
||||
}
|
||||
|
||||
free_pci_root_info_res(info);
|
||||
|
||||
teardown_mcfg_map(info);
|
||||
|
||||
kfree(info);
|
||||
list_splice_tail(crs_res, resources);
|
||||
}
|
||||
|
||||
static void release_pci_root_info(struct pci_host_bridge *bridge)
|
||||
{
|
||||
struct resource *res;
|
||||
struct resource_entry *entry;
|
||||
struct pci_root_info *info = bridge->release_data;
|
||||
|
||||
__release_pci_root_info(info);
|
||||
resource_list_for_each_entry(entry, &bridge->windows) {
|
||||
res = entry->res;
|
||||
if (res->parent &&
|
||||
(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
|
||||
release_resource(res);
|
||||
}
|
||||
|
||||
teardown_mcfg_map(info);
|
||||
kfree(info);
|
||||
}
|
||||
|
||||
static void probe_pci_root_info(struct pci_root_info *info,
|
||||
struct acpi_device *device,
|
||||
int busnum, int domain)
|
||||
int busnum, int domain,
|
||||
struct list_head *list)
|
||||
{
|
||||
size_t size;
|
||||
int ret;
|
||||
struct resource_entry *entry;
|
||||
|
||||
sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
|
||||
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 = kzalloc_node(size, GFP_KERNEL, info->sd.node);
|
||||
if (!info->res) {
|
||||
info->res_num = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
size = sizeof(*info->res_offset) * info->res_num;
|
||||
info->res_num = 0;
|
||||
info->res_offset = kzalloc_node(size, GFP_KERNEL, info->sd.node);
|
||||
if (!info->res_offset) {
|
||||
kfree(info->res);
|
||||
info->res = NULL;
|
||||
return;
|
||||
}
|
||||
|
||||
acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
|
||||
info);
|
||||
ret = acpi_dev_get_resources(device, list,
|
||||
acpi_dev_filter_resource_type_cb,
|
||||
(void *)(IORESOURCE_IO | IORESOURCE_MEM));
|
||||
if (ret < 0)
|
||||
dev_warn(&device->dev,
|
||||
"failed to parse _CRS method, error code %d\n", ret);
|
||||
else if (ret == 0)
|
||||
dev_dbg(&device->dev,
|
||||
"no IO and memory resources present in _CRS\n");
|
||||
else
|
||||
resource_list_for_each_entry(entry, list)
|
||||
entry->res->name = info->name;
|
||||
}
|
||||
|
||||
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
|
||||
|
|
@ -475,6 +355,8 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
|
|||
struct pci_root_info *info;
|
||||
int domain = root->segment;
|
||||
int busnum = root->secondary.start;
|
||||
struct resource_entry *res_entry;
|
||||
LIST_HEAD(crs_res);
|
||||
LIST_HEAD(resources);
|
||||
struct pci_bus *bus;
|
||||
struct pci_sysdata *sd;
|
||||
|
|
@ -522,18 +404,22 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
|
|||
memcpy(bus->sysdata, sd, sizeof(*sd));
|
||||
kfree(info);
|
||||
} else {
|
||||
probe_pci_root_info(info, device, busnum, domain);
|
||||
|
||||
/* insert busn res at first */
|
||||
pci_add_resource(&resources, &root->secondary);
|
||||
|
||||
/*
|
||||
* _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)
|
||||
add_resources(info, &resources);
|
||||
else {
|
||||
free_pci_root_info_res(info);
|
||||
probe_pci_root_info(info, device, busnum, domain, &crs_res);
|
||||
if (pci_use_crs) {
|
||||
add_resources(info, &resources, &crs_res);
|
||||
} else {
|
||||
resource_list_for_each_entry(res_entry, &crs_res)
|
||||
dev_printk(KERN_DEBUG, &device->dev,
|
||||
"host bridge window %pR (ignored)\n",
|
||||
res_entry->res);
|
||||
resource_list_free(&crs_res);
|
||||
x86_pci_root_bus_resources(busnum, &resources);
|
||||
}
|
||||
|
||||
|
|
@ -548,8 +434,9 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
|
|||
to_pci_host_bridge(bus->bridge),
|
||||
release_pci_root_info, info);
|
||||
} else {
|
||||
pci_free_resource_list(&resources);
|
||||
__release_pci_root_info(info);
|
||||
resource_list_free(&resources);
|
||||
teardown_mcfg_map(info);
|
||||
kfree(info);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue