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x86/PCI/ACPI: Use common ACPI resource interfaces to simplify implementation

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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 2015-02-05 13:44:46 +08:00 committed by Rafael J. Wysocki
parent 812dbd9994
commit 593669c2ac
1 changed files with 94 additions and 207 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

301
arch/x86/pci/acpi.c
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@ -10,9 +10,6 @@
struct pci_root_info { struct pci_root_info {
struct acpi_device *bridge; struct acpi_device *bridge;
char name[16]; char name[16];
unsigned int res_num;
struct resource *res;
resource_size_t *res_offset;
struct pci_sysdata sd; struct pci_sysdata sd;
#ifdef CONFIG_PCI_MMCONFIG #ifdef CONFIG_PCI_MMCONFIG
bool mcfg_added; bool mcfg_added;
@ -218,132 +215,41 @@ static void teardown_mcfg_map(struct pci_root_info *info)
} }
#endif #endif
static acpi_status resource_to_addr(struct acpi_resource *resource, static void validate_resources(struct device *dev, struct list_head *crs_res,
struct acpi_resource_address64 *addr) unsigned long type)
{ {
acpi_status status; LIST_HEAD(list);
struct acpi_resource_memory24 *memory24; struct resource *res1, *res2, *root = NULL;
struct acpi_resource_memory32 *memory32; struct resource_entry *tmp, *entry, *entry2;
struct acpi_resource_fixed_memory32 *fixed_memory32;
memset(addr, 0, sizeof(*addr)); BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
switch (resource->type) { root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
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;
}
static acpi_status count_resource(struct acpi_resource *acpi_res, void *data) list_splice_init(crs_res, &list);
{ resource_list_for_each_entry_safe(entry, tmp, &list) {
struct pci_root_info *info = data; bool free = false;
struct acpi_resource_address64 addr; resource_size_t end;
acpi_status status;
status = resource_to_addr(acpi_res, &addr); res1 = entry->res;
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];
if (!(res1->flags & type)) if (!(res1->flags & type))
continue; goto next;
for (j = i + 1; j < info->res_num; j++) { /* Exclude non-addressable range or non-addressable portion */
res2 = &info->res[j]; 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)) if (!(res2->flags & type))
continue; continue;
@ -355,118 +261,92 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type)
if (resource_overlaps(res1, res2)) { if (resource_overlaps(res1, res2)) {
res2->start = min(res1->start, res2->start); res2->start = min(res1->start, res2->start);
res2->end = max(res1->end, res2->end); res2->end = max(res1->end, res2->end);
dev_info(&info->bridge->dev, dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
"host bridge window expanded to %pR; %pR ignored\n",
res2, res1); 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, 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_entry *entry, *tmp;
struct resource *res, *root, *conflict; struct resource *res, *conflict, *root = NULL;
coalesce_windows(info, IORESOURCE_MEM); validate_resources(&info->bridge->dev, crs_res, IORESOURCE_MEM);
coalesce_windows(info, IORESOURCE_IO); validate_resources(&info->bridge->dev, crs_res, IORESOURCE_IO);
for (i = 0; i < info->res_num; i++) {
res = &info->res[i];
resource_list_for_each_entry_safe(entry, tmp, crs_res) {
res = entry->res;
if (res->flags & IORESOURCE_MEM) if (res->flags & IORESOURCE_MEM)
root = &iomem_resource; root = &iomem_resource;
else if (res->flags & IORESOURCE_IO) else if (res->flags & IORESOURCE_IO)
root = &ioport_resource; root = &ioport_resource;
else else
continue; BUG_ON(res);
conflict = insert_resource_conflict(root, res); conflict = insert_resource_conflict(root, res);
if (conflict) if (conflict) {
dev_info(&info->bridge->dev, dev_info(&info->bridge->dev,
"ignoring host bridge window %pR (conflicts with %s %pR)\n", "ignoring host bridge window %pR (conflicts with %s %pR)\n",
res, conflict->name, conflict); res, conflict->name, conflict);
else resource_list_destroy_entry(entry);
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);
} }
free_pci_root_info_res(info); list_splice_tail(crs_res, resources);
teardown_mcfg_map(info);
kfree(info);
} }
static void release_pci_root_info(struct pci_host_bridge *bridge) 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; 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, static void probe_pci_root_info(struct pci_root_info *info,
struct acpi_device *device, 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); sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
info->bridge = device; info->bridge = device;
ret = acpi_dev_get_resources(device, list,
info->res_num = 0; acpi_dev_filter_resource_type_cb,
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource, (void *)(IORESOURCE_IO | IORESOURCE_MEM));
info); if (ret < 0)
if (!info->res_num) dev_warn(&device->dev,
return; "failed to parse _CRS method, error code %d\n", ret);
else if (ret == 0)
size = sizeof(*info->res) * info->res_num; dev_dbg(&device->dev,
info->res = kzalloc_node(size, GFP_KERNEL, info->sd.node); "no IO and memory resources present in _CRS\n");
if (!info->res) { else
info->res_num = 0; resource_list_for_each_entry(entry, list)
return; entry->res->name = info->name;
}
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);
} }
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) 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; struct pci_root_info *info;
int domain = root->segment; int domain = root->segment;
int busnum = root->secondary.start; int busnum = root->secondary.start;
struct resource_entry *res_entry;
LIST_HEAD(crs_res);
LIST_HEAD(resources); LIST_HEAD(resources);
struct pci_bus *bus; struct pci_bus *bus;
struct pci_sysdata *sd; 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)); memcpy(bus->sysdata, sd, sizeof(*sd));
kfree(info); kfree(info);
} else { } else {
probe_pci_root_info(info, device, busnum, domain);
/* insert busn res at first */ /* insert busn res at first */
pci_add_resource(&resources, &root->secondary); pci_add_resource(&resources, &root->secondary);
/* /*
* _CRS with no apertures is normal, so only fall back to * _CRS with no apertures is normal, so only fall back to
* defaults or native bridge info if we're ignoring _CRS. * defaults or native bridge info if we're ignoring _CRS.
*/ */
if (pci_use_crs) probe_pci_root_info(info, device, busnum, domain, &crs_res);
add_resources(info, &resources); if (pci_use_crs) {
else { add_resources(info, &resources, &crs_res);
free_pci_root_info_res(info); } 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); 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), to_pci_host_bridge(bus->bridge),
release_pci_root_info, info); release_pci_root_info, info);
} else { } else {
pci_free_resource_list(&resources); resource_list_free(&resources);
__release_pci_root_info(info); teardown_mcfg_map(info);
kfree(info);
} }
} }