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-rw-r--r--arch/x86/include/asm/pci_x86.h2
-rw-r--r--arch/x86/pci/acpi.c293
-rw-r--r--arch/x86/pci/bus_numa.c4
-rw-r--r--arch/x86/pci/common.c34
-rw-r--r--arch/x86/pci/intel_mid_pci.c4
-rw-r--r--arch/x86/pci/irq.c15
6 files changed, 124 insertions, 228 deletions
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
index 164e3f8d3c3d..fa1195dae425 100644
--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -93,8 +93,6 @@ extern raw_spinlock_t pci_config_lock;
extern int (*pcibios_enable_irq)(struct pci_dev *dev);
extern void (*pcibios_disable_irq)(struct pci_dev *dev);
-extern bool mp_should_keep_irq(struct device *dev);
-
struct pci_raw_ops {
int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
int reg, int len, u32 *val);
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index bb98afd0591e..6ac273832f28 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -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;
@@ -218,130 +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)
-{
- acpi_status status;
- struct acpi_resource_memory24 *memory24;
- struct acpi_resource_memory32 *memory32;
- struct acpi_resource_fixed_memory32 *fixed_memory32;
-
- 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;
-}
-
-static acpi_status count_resource(struct acpi_resource *acpi_res, void *data)
+static void validate_resources(struct device *dev, struct list_head *crs_res,
+ unsigned long type)
{
- struct pci_root_info *info = data;
- struct acpi_resource_address64 addr;
- acpi_status status;
-
- 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;
-
- 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;
- } else if (addr.resource_type == ACPI_IO_RANGE) {
- flags = IORESOURCE_IO;
- } 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, (u64)iomem_resource.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);
- }
+ LIST_HEAD(list);
+ struct resource *res1, *res2, *root = NULL;
+ struct resource_entry *tmp, *entry, *entry2;
- 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++;
+ BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
+ root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
- if (!pci_use_crs)
- dev_printk(KERN_DEBUG, &info->bridge->dev,
- "host bridge window %pR (ignored)\n", res);
+ list_splice_init(crs_res, &list);
+ resource_list_for_each_entry_safe(entry, tmp, &list) {
+ bool free = false;
+ resource_size_t end;
- 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;
+
+ /* 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;
+ }
- for (j = i + 1; j < info->res_num; j++) {
- res2 = &info->res[j];
+ resource_list_for_each_entry(entry2, crs_res) {
+ res2 = entry2->res;
if (!(res2->flags & type))
continue;
@@ -353,118 +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;
-
- coalesce_windows(info, IORESOURCE_MEM);
- coalesce_windows(info, IORESOURCE_IO);
+ struct resource_entry *entry, *tmp;
+ struct resource *res, *conflict, *root = NULL;
- 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]);
+ resource_list_destroy_entry(entry);
+ }
}
-}
-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;
+ list_splice_tail(crs_res, resources);
}
-static void __release_pci_root_info(struct pci_root_info *info)
+static void release_pci_root_info(struct pci_host_bridge *bridge)
{
- int i;
struct resource *res;
+ struct resource_entry *entry;
+ struct pci_root_info *info = bridge->release_data;
- 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_for_each_entry(entry, &bridge->windows) {
+ res = entry->res;
+ if (res->parent &&
+ (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
+ release_resource(res);
}
- free_pci_root_info_res(info);
-
teardown_mcfg_map(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 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)
@@ -473,6 +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;
@@ -520,18 +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);
}
@@ -546,8 +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);
}
}
diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c
index f3a2cfc14125..7bcf06a7cd12 100644
--- a/arch/x86/pci/bus_numa.c
+++ b/arch/x86/pci/bus_numa.c
@@ -31,7 +31,7 @@ void x86_pci_root_bus_resources(int bus, struct list_head *resources)
{
struct pci_root_info *info = x86_find_pci_root_info(bus);
struct pci_root_res *root_res;
- struct pci_host_bridge_window *window;
+ struct resource_entry *window;
bool found = false;
if (!info)
@@ -41,7 +41,7 @@ void x86_pci_root_bus_resources(int bus, struct list_head *resources)
bus);
/* already added by acpi ? */
- list_for_each_entry(window, resources, list)
+ resource_list_for_each_entry(window, resources)
if (window->res->flags & IORESOURCE_BUS) {
found = true;
break;
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 2fb384724ebb..3d2612b68694 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -513,6 +513,31 @@ void __init pcibios_set_cache_line_size(void)
}
}
+/*
+ * Some device drivers assume dev->irq won't change after calling
+ * pci_disable_device(). So delay releasing of IRQ resource to driver
+ * unbinding time. Otherwise it will break PM subsystem and drivers
+ * like xen-pciback etc.
+ */
+static int pci_irq_notifier(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ struct pci_dev *dev = to_pci_dev(data);
+
+ if (action != BUS_NOTIFY_UNBOUND_DRIVER)
+ return NOTIFY_DONE;
+
+ if (pcibios_disable_irq)
+ pcibios_disable_irq(dev);
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block pci_irq_nb = {
+ .notifier_call = pci_irq_notifier,
+ .priority = INT_MIN,
+};
+
int __init pcibios_init(void)
{
if (!raw_pci_ops) {
@@ -525,6 +550,9 @@ int __init pcibios_init(void)
if (pci_bf_sort >= pci_force_bf)
pci_sort_breadthfirst();
+
+ bus_register_notifier(&pci_bus_type, &pci_irq_nb);
+
return 0;
}
@@ -683,12 +711,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
return 0;
}
-void pcibios_disable_device (struct pci_dev *dev)
-{
- if (!pci_dev_msi_enabled(dev) && pcibios_disable_irq)
- pcibios_disable_irq(dev);
-}
-
int pci_ext_cfg_avail(void)
{
if (raw_pci_ext_ops)
diff --git a/arch/x86/pci/intel_mid_pci.c b/arch/x86/pci/intel_mid_pci.c
index 44b9271580b5..95c2471f6819 100644
--- a/arch/x86/pci/intel_mid_pci.c
+++ b/arch/x86/pci/intel_mid_pci.c
@@ -234,10 +234,10 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev)
static void intel_mid_pci_irq_disable(struct pci_dev *dev)
{
- if (!mp_should_keep_irq(&dev->dev) && dev->irq_managed &&
- dev->irq > 0) {
+ if (dev->irq_managed && dev->irq > 0) {
mp_unmap_irq(dev->irq);
dev->irq_managed = 0;
+ dev->irq = 0;
}
}
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index 5dc6ca5e1741..e71b3dbd87b8 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -1256,22 +1256,9 @@ static int pirq_enable_irq(struct pci_dev *dev)
return 0;
}
-bool mp_should_keep_irq(struct device *dev)
-{
- if (dev->power.is_prepared)
- return true;
-#ifdef CONFIG_PM
- if (dev->power.runtime_status == RPM_SUSPENDING)
- return true;
-#endif
-
- return false;
-}
-
static void pirq_disable_irq(struct pci_dev *dev)
{
- if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) &&
- dev->irq_managed && dev->irq) {
+ if (io_apic_assign_pci_irqs && dev->irq_managed && dev->irq) {
mp_unmap_irq(dev->irq);
dev->irq = 0;
dev->irq_managed = 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 18:34:15 +0000