#define pci_legacy_read platform_pci_legacy_read
#define pci_legacy_write platform_pci_legacy_write
-struct iospace_resource {
- struct list_head list;
- struct resource res;
-};
-
struct pci_controller {
struct acpi_device *companion;
void *iommu;
.write = pci_write,
};
-/* Called by ACPI when it finds a new root bus. */
-
-static struct pci_controller *alloc_pci_controller(int seg)
-{
- struct pci_controller *controller;
-
- controller = kzalloc(sizeof(*controller), GFP_KERNEL);
- if (!controller)
- return NULL;
-
- controller->segment = seg;
- return controller;
-}
-
struct pci_root_info {
- struct acpi_device *bridge;
- struct pci_controller *controller;
- struct list_head resources;
- struct resource *res;
- resource_size_t *res_offset;
- unsigned int res_num;
+ struct acpi_pci_root_info common;
+ struct pci_controller controller;
struct list_head io_resources;
- char *name;
};
-static unsigned int
-new_space (u64 phys_base, int sparse)
+static unsigned int new_space(u64 phys_base, int sparse)
{
u64 mmio_base;
int i;
return i;
}
-static u64 add_io_space(struct pci_root_info *info,
- struct acpi_resource_address64 *addr)
+static int add_io_space(struct device *dev, struct pci_root_info *info,
+ struct resource_entry *entry)
{
- struct iospace_resource *iospace;
- struct resource *resource;
+ struct resource_entry *iospace;
+ struct resource *resource, *res = entry->res;
char *name;
unsigned long base, min, max, base_port;
unsigned int sparse = 0, space_nr, len;
- len = strlen(info->name) + 32;
- iospace = kzalloc(sizeof(*iospace) + len, GFP_KERNEL);
+ len = strlen(info->common.name) + 32;
+ iospace = resource_list_create_entry(NULL, len);
if (!iospace) {
- dev_err(&info->bridge->dev,
- "PCI: No memory for %s I/O port space\n",
- info->name);
- goto out;
+ dev_err(dev, "PCI: No memory for %s I/O port space\n",
+ info->common.name);
+ return -ENOMEM;
}
- name = (char *)(iospace + 1);
-
- min = addr->address.minimum;
- max = min + addr->address.address_length - 1;
- if (addr->info.io.translation_type == ACPI_SPARSE_TRANSLATION)
+ if (res->flags & IORESOURCE_IO_SPARSE)
sparse = 1;
-
- space_nr = new_space(addr->address.translation_offset, sparse);
+ space_nr = new_space(entry->offset, sparse);
if (space_nr == ~0)
goto free_resource;
+ name = (char *)(iospace + 1);
+ min = res->start - entry->offset;
+ max = res->end - entry->offset;
base = __pa(io_space[space_nr].mmio_base);
base_port = IO_SPACE_BASE(space_nr);
- snprintf(name, len, "%s I/O Ports %08lx-%08lx", info->name,
- base_port + min, base_port + max);
+ snprintf(name, len, "%s I/O Ports %08lx-%08lx", info->common.name,
+ base_port + min, base_port + max);
/*
* The SDM guarantees the legacy 0-64K space is sparse, but if the
if (space_nr == 0)
sparse = 1;
- resource = &iospace->res;
+ resource = iospace->res;
resource->name = name;
resource->flags = IORESOURCE_MEM;
resource->start = base + (sparse ? IO_SPACE_SPARSE_ENCODING(min) : min);
resource->end = base + (sparse ? IO_SPACE_SPARSE_ENCODING(max) : max);
if (insert_resource(&iomem_resource, resource)) {
- dev_err(&info->bridge->dev,
- "can't allocate host bridge io space resource %pR\n",
- resource);
+ dev_err(dev,
+ "can't allocate host bridge io space resource %pR\n",
+ resource);
goto free_resource;
}
- list_add_tail(&iospace->list, &info->io_resources);
- return base_port;
+ entry->offset = base_port;
+ res->start = min + base_port;
+ res->end = max + base_port;
+ resource_list_add_tail(iospace, &info->io_resources);
-free_resource:
- kfree(iospace);
-out:
- return ~0;
-}
-
-static acpi_status resource_to_window(struct acpi_resource *resource,
- struct acpi_resource_address64 *addr)
-{
- acpi_status status;
+ return 0;
- /*
- * We're only interested in _CRS descriptors that are
- * - address space descriptors for memory or I/O space
- * - non-zero size
- */
- 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)
- return AE_OK;
-
- return AE_ERROR;
+free_resource:
+ resource_list_free_entry(iospace);
+ return -ENOSPC;
}
-static acpi_status count_window(struct acpi_resource *resource, void *data)
+/*
+ * An IO port or MMIO resource assigned to a PCI host bridge may be
+ * consumed by the host bridge itself or available to its child
+ * bus/devices. The ACPI specification defines a bit (Producer/Consumer)
+ * to tell whether the resource is consumed by the host bridge itself,
+ * but firmware hasn't used that bit consistently, so we can't rely on it.
+ *
+ * On x86 and IA64 platforms, all IO port and MMIO resources are assumed
+ * to be available to child bus/devices except one special case:
+ * IO port [0xCF8-0xCFF] is consumed by the host bridge itself
+ * to access PCI configuration space.
+ *
+ * So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF].
+ */
+static bool resource_is_pcicfg_ioport(struct resource *res)
{
- unsigned int *windows = (unsigned int *) data;
- struct acpi_resource_address64 addr;
- acpi_status status;
-
- status = resource_to_window(resource, &addr);
- if (ACPI_SUCCESS(status))
- (*windows)++;
-
- return AE_OK;
+ return (res->flags & IORESOURCE_IO) &&
+ res->start == 0xCF8 && res->end == 0xCFF;
}
-static acpi_status add_window(struct acpi_resource *res, void *data)
+static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci)
{
- struct pci_root_info *info = data;
- struct resource *resource;
- struct acpi_resource_address64 addr;
- acpi_status status;
- unsigned long flags, offset = 0;
- struct resource *root;
-
- /* Return AE_OK for non-window resources to keep scanning for more */
- status = resource_to_window(res, &addr);
- if (!ACPI_SUCCESS(status))
- return AE_OK;
-
- if (addr.resource_type == ACPI_MEMORY_RANGE) {
- flags = IORESOURCE_MEM;
- root = &iomem_resource;
- offset = addr.address.translation_offset;
- } else if (addr.resource_type == ACPI_IO_RANGE) {
- flags = IORESOURCE_IO;
- root = &ioport_resource;
- offset = add_io_space(info, &addr);
- if (offset == ~0)
- return AE_OK;
- } else
- return AE_OK;
-
- resource = &info->res[info->res_num];
- resource->name = info->name;
- resource->flags = flags;
- resource->start = addr.address.minimum + offset;
- resource->end = resource->start + addr.address.address_length - 1;
- info->res_offset[info->res_num] = offset;
-
- if (insert_resource(root, resource)) {
- dev_err(&info->bridge->dev,
- "can't allocate host bridge window %pR\n",
- resource);
- } else {
- if (offset)
- dev_info(&info->bridge->dev, "host bridge window %pR "
- "(PCI address [%#llx-%#llx])\n",
- resource,
- resource->start - offset,
- resource->end - offset);
- else
- dev_info(&info->bridge->dev,
- "host bridge window %pR\n", resource);
+ struct device *dev = &ci->bridge->dev;
+ struct pci_root_info *info;
+ struct resource *res;
+ struct resource_entry *entry, *tmp;
+ int status;
+
+ status = acpi_pci_probe_root_resources(ci);
+ if (status > 0) {
+ info = container_of(ci, struct pci_root_info, common);
+ resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
+ res = entry->res;
+ if (res->flags & IORESOURCE_MEM) {
+ /*
+ * HP's firmware has a hack to work around a
+ * Windows bug. Ignore these tiny memory ranges.
+ */
+ if (resource_size(res) <= 16) {
+ resource_list_del(entry);
+ insert_resource(&iomem_resource,
+ entry->res);
+ resource_list_add_tail(entry,
+ &info->io_resources);
+ }
+ } else if (res->flags & IORESOURCE_IO) {
+ if (resource_is_pcicfg_ioport(entry->res))
+ resource_list_destroy_entry(entry);
+ else if (add_io_space(dev, info, entry))
+ resource_list_destroy_entry(entry);
+ }
+ }
}
- /* HP's firmware has a hack to work around a Windows bug.
- * Ignore these tiny memory ranges */
- if (!((resource->flags & IORESOURCE_MEM) &&
- (resource->end - resource->start < 16)))
- pci_add_resource_offset(&info->resources, resource,
- info->res_offset[info->res_num]);
-
- info->res_num++;
- return AE_OK;
-}
-static void free_pci_root_info_res(struct pci_root_info *info)
-{
- struct iospace_resource *iospace, *tmp;
-
- list_for_each_entry_safe(iospace, tmp, &info->io_resources, list)
- kfree(iospace);
-
- kfree(info->name);
- kfree(info->res);
- info->res = NULL;
- kfree(info->res_offset);
- info->res_offset = NULL;
- info->res_num = 0;
- kfree(info->controller);
- info->controller = NULL;
+ return status;
}
-static void __release_pci_root_info(struct pci_root_info *info)
+static void pci_acpi_root_release_info(struct acpi_pci_root_info *ci)
{
- int i;
- struct resource *res;
- struct iospace_resource *iospace;
+ struct pci_root_info *info;
+ struct resource_entry *entry, *tmp;
- list_for_each_entry(iospace, &info->io_resources, list)
- release_resource(&iospace->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);
+ info = container_of(ci, struct pci_root_info, common);
+ resource_list_for_each_entry_safe(entry, tmp, &info->io_resources) {
+ release_resource(entry->res);
+ resource_list_destroy_entry(entry);
}
-
- free_pci_root_info_res(info);
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 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;
-}
+static struct acpi_pci_root_ops pci_acpi_root_ops = {
+ .pci_ops = &pci_root_ops,
+ .release_info = pci_acpi_root_release_info,
+ .prepare_resources = pci_acpi_root_prepare_resources,
+};
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
- int domain = root->segment;
- int bus = root->secondary.start;
- struct pci_controller *controller;
- struct pci_root_info *info = NULL;
- int busnum = root->secondary.start;
- struct pci_bus *pbus;
- int ret;
-
- controller = alloc_pci_controller(domain);
- if (!controller)
- return NULL;
-
- controller->companion = device;
- controller->node = acpi_get_node(device->handle);
+ struct pci_root_info *info;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info) {
dev_err(&device->dev,
- "pci_bus %04x:%02x: ignored (out of memory)\n",
- domain, busnum);
- kfree(controller);
+ "pci_bus %04x:%02x: ignored (out of memory)\n",
+ root->segment, (int)root->secondary.start);
return NULL;
}
- info->controller = controller;
+ info->controller.segment = root->segment;
+ info->controller.companion = device;
+ info->controller.node = acpi_get_node(device->handle);
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);
- /*
- * See arch/x86/pci/acpi.c.
- * The desired pci bus might already be scanned in a quirk. We
- * should handle the case here, but it appears that IA64 hasn't
- * such quirk. So we just ignore the case now.
- */
- pbus = pci_create_root_bus(NULL, bus, &pci_root_ops, controller,
- &info->resources);
- if (!pbus) {
- pci_free_resource_list(&info->resources);
- __release_pci_root_info(info);
- return NULL;
- }
-
- pci_set_host_bridge_release(to_pci_host_bridge(pbus->bridge),
- release_pci_root_info, info);
- pci_scan_child_bus(pbus);
- return pbus;
+ return acpi_pci_root_create(root, &pci_acpi_root_ops,
+ &info->common, &info->controller);
}
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
#include <linux/irq.h>
#include <linux/dmi.h>
#include <linux/slab.h>
+#include <linux/pci-acpi.h>
#include <asm/numa.h>
#include <asm/pci_x86.h>
struct pci_root_info {
- struct acpi_device *bridge;
- char name[16];
+ struct acpi_pci_root_info common;
struct pci_sysdata sd;
#ifdef CONFIG_PCI_MMCONFIG
bool mcfg_added;
- u16 segment;
u8 start_bus;
u8 end_bus;
#endif
return 0;
}
-static int setup_mcfg_map(struct pci_root_info *info, u16 seg, u8 start,
- u8 end, phys_addr_t addr)
+static int setup_mcfg_map(struct acpi_pci_root_info *ci)
{
- int result;
- struct device *dev = &info->bridge->dev;
+ int result, seg;
+ struct pci_root_info *info;
+ struct acpi_pci_root *root = ci->root;
+ struct device *dev = &ci->bridge->dev;
- info->start_bus = start;
- info->end_bus = end;
+ info = container_of(ci, struct pci_root_info, common);
+ info->start_bus = (u8)root->secondary.start;
+ info->end_bus = (u8)root->secondary.end;
info->mcfg_added = false;
+ seg = info->sd.domain;
/* return success if MMCFG is not in use */
if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg)
if (!(pci_probe & PCI_PROBE_MMCONF))
return check_segment(seg, dev, "MMCONFIG is disabled,");
- result = pci_mmconfig_insert(dev, seg, start, end, addr);
+ result = pci_mmconfig_insert(dev, seg, info->start_bus, info->end_bus,
+ root->mcfg_addr);
if (result == 0) {
/* enable MMCFG if it hasn't been enabled yet */
if (raw_pci_ext_ops == NULL)
return 0;
}
-static void teardown_mcfg_map(struct pci_root_info *info)
+static void teardown_mcfg_map(struct acpi_pci_root_info *ci)
{
+ struct pci_root_info *info;
+
+ info = container_of(ci, struct pci_root_info, common);
if (info->mcfg_added) {
- pci_mmconfig_delete(info->segment, info->start_bus,
- info->end_bus);
+ pci_mmconfig_delete(info->sd.domain,
+ info->start_bus, info->end_bus);
info->mcfg_added = false;
}
}
#else
-static int setup_mcfg_map(struct pci_root_info *info,
- u16 seg, u8 start, u8 end,
- phys_addr_t addr)
+static int setup_mcfg_map(struct acpi_pci_root_info *ci)
{
return 0;
}
-static void teardown_mcfg_map(struct pci_root_info *info)
+
+static void teardown_mcfg_map(struct acpi_pci_root_info *ci)
{
}
#endif
-static void validate_resources(struct device *dev, struct list_head *crs_res,
- unsigned long type)
+static int pci_acpi_root_get_node(struct acpi_pci_root *root)
{
- LIST_HEAD(list);
- struct resource *res1, *res2, *root = NULL;
- struct resource_entry *tmp, *entry, *entry2;
-
- BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
- root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
-
- list_splice_init(crs_res, &list);
- resource_list_for_each_entry_safe(entry, tmp, &list) {
- bool free = false;
- resource_size_t end;
-
- res1 = entry->res;
- if (!(res1->flags & type))
- goto next;
-
- /* 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;
-
- /*
- * I don't like throwing away windows because then
- * our resources no longer match the ACPI _CRS, but
- * the kernel resource tree doesn't allow overlaps.
- */
- if (resource_overlaps(res1, res2)) {
- res2->start = min(res1->start, res2->start);
- res2->end = max(res1->end, res2->end);
- dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
- res2, res1);
- free = true;
- goto next;
- }
- }
+ int busnum = root->secondary.start;
+ struct acpi_device *device = root->device;
+ int node = acpi_get_node(device->handle);
-next:
- resource_list_del(entry);
- if (free)
- resource_list_free_entry(entry);
- else
- resource_list_add_tail(entry, crs_res);
+ if (node == NUMA_NO_NODE) {
+ node = x86_pci_root_bus_node(busnum);
+ if (node != 0 && node != NUMA_NO_NODE)
+ dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n",
+ node);
}
+ if (node != NUMA_NO_NODE && !node_online(node))
+ node = NUMA_NO_NODE;
+
+ return node;
}
-static void add_resources(struct pci_root_info *info,
- struct list_head *resources,
- struct list_head *crs_res)
+static int pci_acpi_root_init_info(struct acpi_pci_root_info *ci)
{
- struct resource_entry *entry, *tmp;
- struct resource *res, *conflict, *root = NULL;
-
- 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
- BUG_ON(res);
-
- conflict = insert_resource_conflict(root, res);
- if (conflict) {
- dev_info(&info->bridge->dev,
- "ignoring host bridge window %pR (conflicts with %s %pR)\n",
- res, conflict->name, conflict);
- resource_list_destroy_entry(entry);
- }
- }
-
- list_splice_tail(crs_res, resources);
+ return setup_mcfg_map(ci);
}
-static void release_pci_root_info(struct pci_host_bridge *bridge)
+static void pci_acpi_root_release_info(struct acpi_pci_root_info *ci)
{
- struct resource *res;
- struct resource_entry *entry;
- struct pci_root_info *info = bridge->release_data;
-
- 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);
+ teardown_mcfg_map(ci);
+ kfree(container_of(ci, struct pci_root_info, common));
}
/*
res->start == 0xCF8 && res->end == 0xCFF;
}
-static void probe_pci_root_info(struct pci_root_info *info,
- struct acpi_device *device,
- int busnum, int domain,
- struct list_head *list)
+static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci)
{
- int ret;
+ struct acpi_device *device = ci->bridge;
+ int busnum = ci->root->secondary.start;
struct resource_entry *entry, *tmp;
+ int status;
- sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
- info->bridge = device;
- 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_safe(entry, tmp, list) {
- if ((entry->res->flags & IORESOURCE_DISABLED) ||
- resource_is_pcicfg_ioport(entry->res))
+ status = acpi_pci_probe_root_resources(ci);
+ if (pci_use_crs) {
+ resource_list_for_each_entry_safe(entry, tmp, &ci->resources)
+ if (resource_is_pcicfg_ioport(entry->res))
resource_list_destroy_entry(entry);
- else
- entry->res->name = info->name;
- }
+ return status;
+ }
+
+ resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
+ dev_printk(KERN_DEBUG, &device->dev,
+ "host bridge window %pR (ignored)\n", entry->res);
+ resource_list_destroy_entry(entry);
+ }
+ x86_pci_root_bus_resources(busnum, &ci->resources);
+
+ return 0;
}
+static struct acpi_pci_root_ops acpi_pci_root_ops = {
+ .pci_ops = &pci_root_ops,
+ .init_info = pci_acpi_root_init_info,
+ .release_info = pci_acpi_root_release_info,
+ .prepare_resources = pci_acpi_root_prepare_resources,
+};
+
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
- struct acpi_device *device = root->device;
- 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);
+ int node = pci_acpi_root_get_node(root);
struct pci_bus *bus;
- struct pci_sysdata *sd;
- int node;
if (pci_ignore_seg)
- domain = 0;
+ root->segment = domain = 0;
if (domain && !pci_domains_supported) {
printk(KERN_WARNING "pci_bus %04x:%02x: "
return NULL;
}
- node = acpi_get_node(device->handle);
- if (node == NUMA_NO_NODE) {
- node = x86_pci_root_bus_node(busnum);
- if (node != 0 && node != NUMA_NO_NODE)
- dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n",
- node);
- }
-
- if (node != NUMA_NO_NODE && !node_online(node))
- node = NUMA_NO_NODE;
-
- info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
- 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;
- sd->companion = device;
-
bus = pci_find_bus(domain, busnum);
if (bus) {
/*
* If the desired bus has been scanned already, replace
* its bus->sysdata.
*/
- memcpy(bus->sysdata, sd, sizeof(*sd));
- kfree(info);
- } else {
- /* insert busn res at first */
- pci_add_resource(&resources, &root->secondary);
+ struct pci_sysdata sd = {
+ .domain = domain,
+ .node = node,
+ .companion = root->device
+ };
- /*
- * _CRS with no apertures is normal, so only fall back to
- * defaults or native bridge info if we're ignoring _CRS.
- */
- 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);
- }
-
- if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
- (u8)root->secondary.end, root->mcfg_addr))
- bus = pci_create_root_bus(NULL, busnum, &pci_root_ops,
- sd, &resources);
-
- if (bus) {
- pci_scan_child_bus(bus);
- pci_set_host_bridge_release(
- to_pci_host_bridge(bus->bridge),
- release_pci_root_info, info);
- } else {
- resource_list_free(&resources);
- teardown_mcfg_map(info);
- kfree(info);
+ memcpy(bus->sysdata, &sd, sizeof(sd));
+ } else {
+ struct pci_root_info *info;
+
+ info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
+ if (!info)
+ dev_err(&root->device->dev,
+ "pci_bus %04x:%02x: ignored (out of memory)\n",
+ domain, busnum);
+ else {
+ info->sd.domain = domain;
+ info->sd.node = node;
+ info->sd.companion = root->device;
+ bus = acpi_pci_root_create(root, &acpi_pci_root_ops,
+ &info->common, &info->sd);
}
}
pcie_bus_configure_settings(child);
}
- if (bus && node != NUMA_NO_NODE)
- dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
-
return bus;
}
kfree(root);
}
+/*
+ * Following code to support acpi_pci_root_create() is copied from
+ * arch/x86/pci/acpi.c and modified so it could be reused by x86, IA64
+ * and ARM64.
+ */
+static void acpi_pci_root_validate_resources(struct device *dev,
+ struct list_head *resources,
+ unsigned long type)
+{
+ LIST_HEAD(list);
+ struct resource *res1, *res2, *root = NULL;
+ struct resource_entry *tmp, *entry, *entry2;
+
+ BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
+ root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
+
+ list_splice_init(resources, &list);
+ resource_list_for_each_entry_safe(entry, tmp, &list) {
+ bool free = false;
+ resource_size_t end;
+
+ res1 = entry->res;
+ if (!(res1->flags & type))
+ goto next;
+
+ /* 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, resources) {
+ res2 = entry2->res;
+ if (!(res2->flags & type))
+ continue;
+
+ /*
+ * I don't like throwing away windows because then
+ * our resources no longer match the ACPI _CRS, but
+ * the kernel resource tree doesn't allow overlaps.
+ */
+ if (resource_overlaps(res1, res2)) {
+ res2->start = min(res1->start, res2->start);
+ res2->end = max(res1->end, res2->end);
+ dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
+ res2, res1);
+ free = true;
+ goto next;
+ }
+ }
+
+next:
+ resource_list_del(entry);
+ if (free)
+ resource_list_free_entry(entry);
+ else
+ resource_list_add_tail(entry, resources);
+ }
+}
+
+int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info)
+{
+ int ret;
+ struct list_head *list = &info->resources;
+ struct acpi_device *device = info->bridge;
+ struct resource_entry *entry, *tmp;
+ unsigned long flags;
+
+ flags = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_MEM_8AND16BIT;
+ ret = acpi_dev_get_resources(device, list,
+ acpi_dev_filter_resource_type_cb,
+ (void *)flags);
+ 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_safe(entry, tmp, list) {
+ if (entry->res->flags & IORESOURCE_DISABLED)
+ resource_list_destroy_entry(entry);
+ else
+ entry->res->name = info->name;
+ }
+ acpi_pci_root_validate_resources(&device->dev, list,
+ IORESOURCE_MEM);
+ acpi_pci_root_validate_resources(&device->dev, list,
+ IORESOURCE_IO);
+ }
+
+ return ret;
+}
+
+static void pci_acpi_root_add_resources(struct acpi_pci_root_info *info)
+{
+ struct resource_entry *entry, *tmp;
+ struct resource *res, *conflict, *root = NULL;
+
+ resource_list_for_each_entry_safe(entry, tmp, &info->resources) {
+ res = entry->res;
+ if (res->flags & IORESOURCE_MEM)
+ root = &iomem_resource;
+ else if (res->flags & IORESOURCE_IO)
+ root = &ioport_resource;
+ else
+ continue;
+
+ conflict = insert_resource_conflict(root, res);
+ if (conflict) {
+ dev_info(&info->bridge->dev,
+ "ignoring host bridge window %pR (conflicts with %s %pR)\n",
+ res, conflict->name, conflict);
+ resource_list_destroy_entry(entry);
+ }
+ }
+}
+
+static void __acpi_pci_root_release_info(struct acpi_pci_root_info *info)
+{
+ struct resource *res;
+ struct resource_entry *entry, *tmp;
+
+ if (!info)
+ return;
+
+ resource_list_for_each_entry_safe(entry, tmp, &info->resources) {
+ res = entry->res;
+ if (res->parent &&
+ (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
+ release_resource(res);
+ resource_list_destroy_entry(entry);
+ }
+
+ info->ops->release_info(info);
+}
+
+static void acpi_pci_root_release_info(struct pci_host_bridge *bridge)
+{
+ struct resource *res;
+ struct resource_entry *entry;
+
+ resource_list_for_each_entry(entry, &bridge->windows) {
+ res = entry->res;
+ if (res->parent &&
+ (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
+ release_resource(res);
+ }
+ __acpi_pci_root_release_info(bridge->release_data);
+}
+
+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);
+ if (!bus)
+ goto out_release_info;
+
+ pci_scan_child_bus(bus);
+ pci_set_host_bridge_release(to_pci_host_bridge(bus->bridge),
+ acpi_pci_root_release_info, info);
+ if (node != NUMA_NO_NODE)
+ dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
+ return bus;
+
+out_release_info:
+ __acpi_pci_root_release_info(info);
+ return NULL;
+}
+
void __init acpi_pci_root_init(void)
{
acpi_hest_init();
EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
- u8 io_decode)
+ u8 io_decode, u8 translation_type)
{
res->flags = IORESOURCE_IO;
if (io_decode == ACPI_DECODE_16)
res->flags |= IORESOURCE_IO_16BIT_ADDR;
+ if (translation_type == ACPI_SPARSE_TRANSLATION)
+ res->flags |= IORESOURCE_IO_SPARSE;
}
static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
{
res->start = start;
res->end = start + len - 1;
- acpi_dev_ioresource_flags(res, len, io_decode);
+ acpi_dev_ioresource_flags(res, len, io_decode, 0);
}
/**
acpi_dev_memresource_flags(res, len, wp);
break;
case ACPI_IO_RANGE:
- acpi_dev_ioresource_flags(res, len, iodec);
+ acpi_dev_ioresource_flags(res, len, iodec,
+ addr->info.io.translation_type);
break;
case ACPI_BUS_NUMBER_RANGE:
res->flags = IORESOURCE_BUS;
/* PnP I/O specific bits (IORESOURCE_BITS) */
#define IORESOURCE_IO_16BIT_ADDR (1<<0)
#define IORESOURCE_IO_FIXED (1<<1)
+#define IORESOURCE_IO_SPARSE (1<<2)
/* PCI ROM control bits (IORESOURCE_BITS) */
#define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
return ACPI_HANDLE(dev);
}
+struct acpi_pci_root;
+struct acpi_pci_root_ops;
+
+struct acpi_pci_root_info {
+ struct acpi_pci_root *root;
+ struct acpi_device *bridge;
+ struct acpi_pci_root_ops *ops;
+ struct list_head resources;
+ char name[16];
+};
+
+struct acpi_pci_root_ops {
+ struct pci_ops *pci_ops;
+ int (*init_info)(struct acpi_pci_root_info *info);
+ void (*release_info)(struct acpi_pci_root_info *info);
+ int (*prepare_resources)(struct acpi_pci_root_info *info);
+};
+
+extern int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info);
+extern 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 *sd);
+
void acpi_pci_add_bus(struct pci_bus *bus);
void acpi_pci_remove_bus(struct pci_bus *bus);
projects / mirror_ubuntu-zesty-kernel.git / commitdiff