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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:31:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:31:35 -0700
commit862f0012549110d6f2586bf54b52ed4540cbff3a (patch)
tree83d29a684b885b1f58af76e0cd29b8552fd480ea /drivers/acpi/pci_root.c
parentf991fae5c6d42dfc5029150b05a78cf3f6c18cc9 (diff)
parenta0f75f9d495b3905b4c658c1d813a127f558a350 (diff)
Merge tag 'pci-v3.11-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas: "PCI device hotplug - Add pci_alloc_dev() interface (Gu Zheng) - Add pci_bus_get()/put() for reference counting (Jiang Liu) - Fix SR-IOV reference count issues (Jiang Liu) - Remove unused acpi_pci_roots list (Jiang Liu) MSI - Conserve interrupt resources on x86 (Alexander Gordeev) AER - Force fatal severity when component has been reset (Betty Dall) - Reset link below Root Port as well as Downstream Port (Betty Dall) - Fix "Firmware first" flag setting (Bjorn Helgaas) - Don't parse HEST for non-PCIe devices (Bjorn Helgaas) ASPM - Warn when we can't disable ASPM as driver requests (Bjorn Helgaas) Miscellaneous - Add CircuitCo PCI IDs (Darren Hart) - Add AMD CZ SATA and SMBus PCI IDs (Shane Huang) - Work around Ivytown NTB BAR size issue (Jon Mason) - Detect invalid initial BAR values (Kevin Hao) - Add pcibios_release_device() (Sebastian Ott) - Fix powerpc & sparc PCI_UNKNOWN power state usage (Bjorn Helgaas)" * tag 'pci-v3.11-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (51 commits) MAINTAINERS: Add ACPI folks for ACPI-related things under drivers/pci PCI: Add CircuitCo vendor ID and subsystem ID PCI: Use pdev->pm_cap instead of pci_find_capability(..,PCI_CAP_ID_PM) PCI: Return early on allocation failures to unindent mainline code PCI: Simplify IOV implementation and fix reference count races PCI: Drop redundant setting of bus->is_added in virtfn_add_bus() unicore32/PCI: Remove redundant call of pci_bus_add_devices() m68k/PCI: Remove redundant call of pci_bus_add_devices() PCI / ACPI / PM: Use correct power state strings in messages PCI: Fix comment typo for pcie_pme_remove() PCI: Rename pci_release_bus_bridge_dev() to pci_release_host_bridge_dev() PCI: Fix refcount issue in pci_create_root_bus() error recovery path ia64/PCI: Clean up pci_scan_root_bus() usage PCI/AER: Reset link for devices below Root Port or Downstream Port ACPI / APEI: Force fatal AER severity when component has been reset PCI/AER: Remove "extern" from function declarations PCI/AER: Move AER severity defines to aer.h PCI/AER: Set dev->__aer_firmware_first only for matching devices PCI/AER: Factor out HEST device type matching PCI/AER: Don't parse HEST table for non-PCIe devices ...
Diffstat (limited to 'drivers/acpi/pci_root.c')
-rw-r--r--drivers/acpi/pci_root.c101
1 files changed, 39 insertions, 62 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index e427dc516c76..5917839321b8 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -65,10 +65,6 @@ static struct acpi_scan_handler pci_root_handler = {
.detach = acpi_pci_root_remove,
};
-/* Lock to protect both acpi_pci_roots lists */
-static DEFINE_MUTEX(acpi_pci_root_lock);
-static LIST_HEAD(acpi_pci_roots);
-
static DEFINE_MUTEX(osc_lock);
/**
@@ -100,13 +96,12 @@ get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
{
struct resource *res = data;
struct acpi_resource_address64 address;
+ acpi_status status;
- if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 &&
- resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 &&
- resource->type != ACPI_RESOURCE_TYPE_ADDRESS64)
+ status = acpi_resource_to_address64(resource, &address);
+ if (ACPI_FAILURE(status))
return AE_OK;
- acpi_resource_to_address64(resource, &address);
if ((address.address_length > 0) &&
(address.resource_type == ACPI_BUS_NUMBER_RANGE)) {
res->start = address.minimum;
@@ -382,23 +377,24 @@ static int acpi_pci_root_add(struct acpi_device *device,
int result;
struct acpi_pci_root *root;
u32 flags, base_flags;
+ acpi_handle handle = device->handle;
root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
if (!root)
return -ENOMEM;
segment = 0;
- status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL,
+ status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL,
&segment);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
- printk(KERN_ERR PREFIX "can't evaluate _SEG\n");
+ dev_err(&device->dev, "can't evaluate _SEG\n");
result = -ENODEV;
goto end;
}
/* Check _CRS first, then _BBN. If no _BBN, default to zero. */
root->secondary.flags = IORESOURCE_BUS;
- status = try_get_root_bridge_busnr(device->handle, &root->secondary);
+ status = try_get_root_bridge_busnr(handle, &root->secondary);
if (ACPI_FAILURE(status)) {
/*
* We need both the start and end of the downstream bus range
@@ -407,33 +403,32 @@ static int acpi_pci_root_add(struct acpi_device *device,
* can do is assume [_BBN-0xFF] or [0-0xFF].
*/
root->secondary.end = 0xFF;
- printk(KERN_WARNING FW_BUG PREFIX
- "no secondary bus range in _CRS\n");
- status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,
+ dev_warn(&device->dev,
+ FW_BUG "no secondary bus range in _CRS\n");
+ status = acpi_evaluate_integer(handle, METHOD_NAME__BBN,
NULL, &bus);
if (ACPI_SUCCESS(status))
root->secondary.start = bus;
else if (status == AE_NOT_FOUND)
root->secondary.start = 0;
else {
- printk(KERN_ERR PREFIX "can't evaluate _BBN\n");
+ dev_err(&device->dev, "can't evaluate _BBN\n");
result = -ENODEV;
goto end;
}
}
- INIT_LIST_HEAD(&root->node);
root->device = device;
root->segment = segment & 0xFFFF;
strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
device->driver_data = root;
- printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
+ pr_info(PREFIX "%s [%s] (domain %04x %pR)\n",
acpi_device_name(device), acpi_device_bid(device),
root->segment, &root->secondary);
- root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle);
+ root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle);
/*
* All supported architectures that use ACPI have support for
@@ -446,10 +441,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
* TBD: Need PCI interface for enumeration/configuration of roots.
*/
- mutex_lock(&acpi_pci_root_lock);
- list_add_tail(&root->node, &acpi_pci_roots);
- mutex_unlock(&acpi_pci_root_lock);
-
/*
* Scan the Root Bridge
* --------------------
@@ -459,11 +450,11 @@ static int acpi_pci_root_add(struct acpi_device *device,
*/
root->bus = pci_acpi_scan_root(root);
if (!root->bus) {
- printk(KERN_ERR PREFIX
- "Bus %04x:%02x not present in PCI namespace\n",
- root->segment, (unsigned int)root->secondary.start);
+ dev_err(&device->dev,
+ "Bus %04x:%02x not present in PCI namespace\n",
+ root->segment, (unsigned int)root->secondary.start);
result = -ENODEV;
- goto out_del_root;
+ goto end;
}
/* Indicate support for various _OSC capabilities. */
@@ -502,7 +493,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
dev_info(&device->dev,
"Requesting ACPI _OSC control (0x%02x)\n", flags);
- status = acpi_pci_osc_control_set(device->handle, &flags,
+ status = acpi_pci_osc_control_set(handle, &flags,
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
if (ACPI_SUCCESS(status)) {
dev_info(&device->dev,
@@ -519,8 +510,8 @@ static int acpi_pci_root_add(struct acpi_device *device,
"ACPI _OSC request failed (%s), "
"returned control mask: 0x%02x\n",
acpi_format_exception(status), flags);
- pr_info("ACPI _OSC control for PCIe not granted, "
- "disabling ASPM\n");
+ dev_info(&device->dev,
+ "ACPI _OSC control for PCIe not granted, disabling ASPM\n");
pcie_no_aspm();
}
} else {
@@ -536,20 +527,14 @@ static int acpi_pci_root_add(struct acpi_device *device,
if (system_state != SYSTEM_BOOTING) {
pcibios_resource_survey_bus(root->bus);
pci_assign_unassigned_bus_resources(root->bus);
- }
- /* need to after hot-added ioapic is registered */
- if (system_state != SYSTEM_BOOTING)
+ /* need to after hot-added ioapic is registered */
pci_enable_bridges(root->bus);
+ }
pci_bus_add_devices(root->bus);
return 1;
-out_del_root:
- mutex_lock(&acpi_pci_root_lock);
- list_del(&root->node);
- mutex_unlock(&acpi_pci_root_lock);
-
end:
kfree(root);
return result;
@@ -566,9 +551,6 @@ static void acpi_pci_root_remove(struct acpi_device *device)
pci_remove_root_bus(root->bus);
- mutex_lock(&acpi_pci_root_lock);
- list_del(&root->node);
- mutex_unlock(&acpi_pci_root_lock);
kfree(root);
}
@@ -588,12 +570,13 @@ static void handle_root_bridge_insertion(acpi_handle handle)
struct acpi_device *device;
if (!acpi_bus_get_device(handle, &device)) {
- printk(KERN_DEBUG "acpi device exists...\n");
+ dev_printk(KERN_DEBUG, &device->dev,
+ "acpi device already exists; ignoring notify\n");
return;
}
if (acpi_bus_scan(handle))
- printk(KERN_ERR "cannot add bridge to acpi list\n");
+ acpi_handle_err(handle, "cannot add bridge to acpi list\n");
}
static void handle_root_bridge_removal(struct acpi_device *device)
@@ -622,7 +605,6 @@ static void handle_root_bridge_removal(struct acpi_device *device)
static void _handle_hotplug_event_root(struct work_struct *work)
{
struct acpi_pci_root *root;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER };
struct acpi_hp_work *hp_work;
acpi_handle handle;
u32 type;
@@ -634,13 +616,12 @@ static void _handle_hotplug_event_root(struct work_struct *work)
acpi_scan_lock_acquire();
root = acpi_pci_find_root(handle);
- acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
/* bus enumerate */
- printk(KERN_DEBUG "%s: Bus check notify on %s\n", __func__,
- (char *)buffer.pointer);
+ acpi_handle_printk(KERN_DEBUG, handle,
+ "Bus check notify on %s\n", __func__);
if (root)
acpiphp_check_host_bridge(handle);
else
@@ -650,28 +631,28 @@ static void _handle_hotplug_event_root(struct work_struct *work)
case ACPI_NOTIFY_DEVICE_CHECK:
/* device check */
- printk(KERN_DEBUG "%s: Device check notify on %s\n", __func__,
- (char *)buffer.pointer);
+ acpi_handle_printk(KERN_DEBUG, handle,
+ "Device check notify on %s\n", __func__);
if (!root)
handle_root_bridge_insertion(handle);
break;
case ACPI_NOTIFY_EJECT_REQUEST:
/* request device eject */
- printk(KERN_DEBUG "%s: Device eject notify on %s\n", __func__,
- (char *)buffer.pointer);
+ acpi_handle_printk(KERN_DEBUG, handle,
+ "Device eject notify on %s\n", __func__);
if (root)
handle_root_bridge_removal(root->device);
break;
default:
- printk(KERN_WARNING "notify_handler: unknown event type 0x%x for %s\n",
- type, (char *)buffer.pointer);
+ acpi_handle_warn(handle,
+ "notify_handler: unknown event type 0x%x\n",
+ type);
break;
}
acpi_scan_lock_release();
kfree(hp_work); /* allocated in handle_hotplug_event_bridge */
- kfree(buffer.pointer);
}
static void handle_hotplug_event_root(acpi_handle handle, u32 type,
@@ -685,9 +666,6 @@ static acpi_status __init
find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
{
acpi_status status;
- char objname[64];
- struct acpi_buffer buffer = { .length = sizeof(objname),
- .pointer = objname };
int *count = (int *)context;
if (!acpi_is_root_bridge(handle))
@@ -695,16 +673,15 @@ find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
(*count)++;
- acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
-
status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_root, NULL);
if (ACPI_FAILURE(status))
- printk(KERN_DEBUG "acpi root: %s notify handler is not installed, exit status: %u\n",
- objname, (unsigned int)status);
+ acpi_handle_printk(KERN_DEBUG, handle,
+ "notify handler is not installed, exit status: %u\n",
+ (unsigned int)status);
else
- printk(KERN_DEBUG "acpi root: %s notify handler is installed\n",
- objname);
+ acpi_handle_printk(KERN_DEBUG, handle,
+ "notify handler is installed\n");
return AE_OK;
}