Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/jbarnes/pci-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI: bus speed strings should be const
  PCI hotplug: Fix build with CONFIG_ACPI unset
  PCI: PCIe: Remove the port driver module exit routine
  PCI: PCIe: Move PCIe PME code to the pcie directory
  PCI: PCIe: Disable PCIe port services during port initialization
  PCI: PCIe: Ask BIOS for control of all native services at once
  ACPI/PCI: Negotiate _OSC control bits before requesting them
  ACPI/PCI: Do not preserve _OSC control bits returned by a query
  ACPI/PCI: Make acpi_pci_query_osc() return control bits
  ACPI/PCI: Reorder checks in acpi_pci_osc_control_set()
  PCI: PCIe: Introduce commad line switch for disabling port services
  PCI: PCIe AER: Introduce pci_aer_available()
  x86/PCI: only define pci_domain_nr if PCI and PCI_DOMAINS are set
  PCI: provide stub pci_domain_nr function for !CONFIG_PCI configs

Documentation/kernel-parameters.txt

@@ -1974,15 +1974,18 @@ and is between 256 and 4096 characters. It is defined in the file
 		force	Enable ASPM even on devices that claim not to support it.
 			WARNING: Forcing ASPM on may cause system lockups.
 
+	pcie_ports=	[PCIE] PCIe ports handling:
+		auto	Ask the BIOS whether or not to use native PCIe services
+			associated with PCIe ports (PME, hot-plug, AER).  Use
+			them only if that is allowed by the BIOS.
+		native	Use native PCIe services associated with PCIe ports
+			unconditionally.
+		compat	Treat PCIe ports as PCI-to-PCI bridges, disable the PCIe
+			ports driver.
+
 	pcie_pme=	[PCIE,PM] Native PCIe PME signaling options:
-			Format: {auto|force}[,nomsi]
-		auto	Use native PCIe PME signaling if the BIOS allows the
-			kernel to control PCIe config registers of root ports.
-		force	Use native PCIe PME signaling even if the BIOS refuses
-			to allow the kernel to control the relevant PCIe config
-			registers.
 		nomsi	Do not use MSI for native PCIe PME signaling (this makes
-			all PCIe root ports use INTx for everything).
+			all PCIe root ports use INTx for all services).
 
 	pcmv=		[HW,PCMCIA] BadgePAD 4
 

arch/x86/include/asm/pci.h

@@ -27,6 +27,9 @@ extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,
 					    int node);
 extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
 
+#ifdef CONFIG_PCI
+
+#ifdef CONFIG_PCI_DOMAINS
 static inline int pci_domain_nr(struct pci_bus *bus)
 {
 	struct pci_sysdata *sd = bus->sysdata;
@@ -37,13 +40,12 @@ static inline int pci_proc_domain(struct pci_bus *bus)
 {
 	return pci_domain_nr(bus);
 }
-
+#endif
 
 /* Can be used to override the logic in pci_scan_bus for skipping
    already-configured bus numbers - to be used for buggy BIOSes
    or architectures with incomplete PCI setup by the loader */
 
-#ifdef CONFIG_PCI
 extern unsigned int pcibios_assign_all_busses(void);
 extern int pci_legacy_init(void);
 # ifdef CONFIG_ACPI

drivers/acpi/pci_root.c

@@ -33,7 +33,6 @@
 #include <linux/pm_runtime.h>
 #include <linux/pci.h>
 #include <linux/pci-acpi.h>
-#include <linux/pci-aspm.h>
 #include <linux/acpi.h>
 #include <linux/slab.h>
 #include <acpi/acpi_bus.h>
@@ -226,22 +225,31 @@ static acpi_status acpi_pci_run_osc(acpi_handle handle,
 	return status;
 }
 
-static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags)
+static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root,
+					u32 support,
+					u32 *control)
 {
 	acpi_status status;
-	u32 support_set, result, capbuf[3];
+	u32 result, capbuf[3];
+
+	support &= OSC_PCI_SUPPORT_MASKS;
+	support |= root->osc_support_set;
 
-	/* do _OSC query for all possible controls */
-	support_set = root->osc_support_set | (flags & OSC_PCI_SUPPORT_MASKS);
 	capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
-	capbuf[OSC_SUPPORT_TYPE] = support_set;
-	capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS;
+	capbuf[OSC_SUPPORT_TYPE] = support;
+	if (control) {
+		*control &= OSC_PCI_CONTROL_MASKS;
+		capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set;
+	} else {
+		/* Run _OSC query for all possible controls. */
+		capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS;
+	}
 
 	status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
 	if (ACPI_SUCCESS(status)) {
-		root->osc_support_set = support_set;
-		root->osc_control_qry = result;
-		root->osc_queried = 1;
+		root->osc_support_set = support;
+		if (control)
+			*control = result;
 	}
 	return status;
 }
@@ -255,7 +263,7 @@ static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
 	if (ACPI_FAILURE(status))
 		return status;
 	mutex_lock(&osc_lock);
-	status = acpi_pci_query_osc(root, flags);
+	status = acpi_pci_query_osc(root, flags, NULL);
 	mutex_unlock(&osc_lock);
 	return status;
 }
@@ -365,55 +373,70 @@ struct pci_dev *acpi_get_pci_dev(acpi_handle handle)
 EXPORT_SYMBOL_GPL(acpi_get_pci_dev);
 
 /**
- * acpi_pci_osc_control_set - commit requested control to Firmware
- * @handle: acpi_handle for the target ACPI object
- * @flags: driver's requested control bits
+ * acpi_pci_osc_control_set - Request control of PCI root _OSC features.
+ * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex).
+ * @mask: Mask of _OSC bits to request control of, place to store control mask.
+ * @req: Mask of _OSC bits the control of is essential to the caller.
+ *
+ * Run _OSC query for @mask and if that is successful, compare the returned
+ * mask of control bits with @req.  If all of the @req bits are set in the
+ * returned mask, run _OSC request for it.
  *
- * Attempt to take control from Firmware on requested control bits.
+ * The variable at the @mask address may be modified regardless of whether or
+ * not the function returns success.  On success it will contain the mask of
+ * _OSC bits the BIOS has granted control of, but its contents are meaningless
+ * on failure.
  **/
-acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags)
+acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req)
 {
+	struct acpi_pci_root *root;
 	acpi_status status;
-	u32 control_req, result, capbuf[3];
+	u32 ctrl, capbuf[3];
 	acpi_handle tmp;
-	struct acpi_pci_root *root;
 
-	status = acpi_get_handle(handle, "_OSC", &tmp);
-	if (ACPI_FAILURE(status))
-		return status;
+	if (!mask)
+		return AE_BAD_PARAMETER;
 
-	control_req = (flags & OSC_PCI_CONTROL_MASKS);
-	if (!control_req)
+	ctrl = *mask & OSC_PCI_CONTROL_MASKS;
+	if ((ctrl & req) != req)
 		return AE_TYPE;
 
 	root = acpi_pci_find_root(handle);
 	if (!root)
 		return AE_NOT_EXIST;
 
+	status = acpi_get_handle(handle, "_OSC", &tmp);
+	if (ACPI_FAILURE(status))
+		return status;
+
 	mutex_lock(&osc_lock);
+
+	*mask = ctrl | root->osc_control_set;
 	/* No need to evaluate _OSC if the control was already granted. */
-	if ((root->osc_control_set & control_req) == control_req)
+	if ((root->osc_control_set & ctrl) == ctrl)
 		goto out;
 
-	/* Need to query controls first before requesting them */
-	if (!root->osc_queried) {
-		status = acpi_pci_query_osc(root, root->osc_support_set);
+	/* Need to check the available controls bits before requesting them. */
+	while (*mask) {
+		status = acpi_pci_query_osc(root, root->osc_support_set, mask);
 		if (ACPI_FAILURE(status))
 			goto out;
+		if (ctrl == *mask)
+			break;
+		ctrl = *mask;
 	}
-	if ((root->osc_control_qry & control_req) != control_req) {
-		printk(KERN_DEBUG
-		       "Firmware did not grant requested _OSC control\n");
+
+	if ((ctrl & req) != req) {
 		status = AE_SUPPORT;
 		goto out;
 	}
 
 	capbuf[OSC_QUERY_TYPE] = 0;
 	capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set;
-	capbuf[OSC_CONTROL_TYPE] = root->osc_control_set | control_req;
-	status = acpi_pci_run_osc(handle, capbuf, &result);
+	capbuf[OSC_CONTROL_TYPE] = ctrl;
+	status = acpi_pci_run_osc(handle, capbuf, mask);
 	if (ACPI_SUCCESS(status))
-		root->osc_control_set = result;
+		root->osc_control_set = *mask;
 out:
 	mutex_unlock(&osc_lock);
 	return status;
@@ -544,14 +567,6 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
 	if (flags != base_flags)
 		acpi_pci_osc_support(root, flags);
 
-	status = acpi_pci_osc_control_set(root->device->handle,
-					  OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
-
-	if (ACPI_FAILURE(status)) {
-		printk(KERN_INFO "Unable to assume PCIe control: Disabling ASPM\n");
-		pcie_no_aspm();
-	}
-
 	pci_acpi_add_bus_pm_notifier(device, root->bus);
 	if (device->wakeup.flags.run_wake)
 		device_set_run_wake(root->bus->bridge, true);

drivers/pci/hotplug/acpi_pcihp.c

@@ -338,9 +338,7 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags)
 	acpi_handle chandle, handle;
 	struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
 
-	flags &= (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL |
-		  OSC_SHPC_NATIVE_HP_CONTROL |
-		  OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
+	flags &= OSC_SHPC_NATIVE_HP_CONTROL;
 	if (!flags) {
 		err("Invalid flags %u specified!\n", flags);
 		return -EINVAL;
@@ -360,7 +358,7 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags)
 		acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
 		dbg("Trying to get hotplug control for %s\n",
 				(char *)string.pointer);
-		status = acpi_pci_osc_control_set(handle, flags);
+		status = acpi_pci_osc_control_set(handle, &flags, flags);
 		if (ACPI_SUCCESS(status))
 			goto got_one;
 		if (status == AE_SUPPORT)

drivers/pci/hotplug/pciehp.h

@@ -176,19 +176,11 @@ static inline void pciehp_firmware_init(void)
 {
 	pciehp_acpi_slot_detection_init();
 }
-
-static inline int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev)
-{
-	int retval;
-	u32 flags = (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL |
-		     OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
-	retval = acpi_get_hp_hw_control_from_firmware(dev, flags);
-	if (retval)
-		return retval;
-	return pciehp_acpi_slot_detection_check(dev);
-}
 #else
 #define pciehp_firmware_init()				do {} while (0)
-#define pciehp_get_hp_hw_control_from_firmware(dev) 	0
+static inline int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
+{
+	return 0;
+}
 #endif 				/* CONFIG_ACPI */
 #endif				/* _PCIEHP_H */

drivers/pci/hotplug/pciehp_acpi.c

@@ -85,9 +85,7 @@ static int __init dummy_probe(struct pcie_device *dev)
 	acpi_handle handle;
 	struct dummy_slot *slot, *tmp;
 	struct pci_dev *pdev = dev->port;
-	/* Note: pciehp_detect_mode != PCIEHP_DETECT_ACPI here */
-	if (pciehp_get_hp_hw_control_from_firmware(pdev))
-		return -ENODEV;
+
 	pos = pci_pcie_cap(pdev);
 	if (!pos)
 		return -ENODEV;

drivers/pci/hotplug/pciehp_core.c

@@ -59,7 +59,7 @@ module_param(pciehp_force, bool, 0644);
 MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
 MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
 MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
-MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if _OSC and OSHP are missing");
+MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
 
 #define PCIE_MODULE_NAME "pciehp"
 
@@ -235,7 +235,7 @@ static int pciehp_probe(struct pcie_device *dev)
 		dev_info(&dev->device,
 			 "Bypassing BIOS check for pciehp use on %s\n",
 			 pci_name(dev->port));
-	else if (pciehp_get_hp_hw_control_from_firmware(dev->port))
+	else if (pciehp_acpi_slot_detection_check(dev->port))
 		goto err_out_none;
 
 	ctrl = pcie_init(dev);

drivers/pci/pci.h

@@ -140,8 +140,10 @@ static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 
 #ifdef CONFIG_PCIEAER
 void pci_no_aer(void);
+bool pci_aer_available(void);
 #else
 static inline void pci_no_aer(void) { }
+static inline bool pci_aer_available(void) { return false; }
 #endif
 
 static inline int pci_no_d1d2(struct pci_dev *dev)

drivers/pci/pcie/Makefile

@@ -6,10 +6,11 @@
 obj-$(CONFIG_PCIEASPM)		+= aspm.o
 
 pcieportdrv-y			:= portdrv_core.o portdrv_pci.o portdrv_bus.o
+pcieportdrv-$(CONFIG_ACPI)	+= portdrv_acpi.o
 
 obj-$(CONFIG_PCIEPORTBUS)	+= pcieportdrv.o
 
 # Build PCI Express AER if needed
 obj-$(CONFIG_PCIEAER)		+= aer/
 
-obj-$(CONFIG_PCIE_PME) += pme/
+obj-$(CONFIG_PCIE_PME) += pme.o

drivers/pci/pcie/aer/aerdrv.c

@@ -72,6 +72,11 @@ void pci_no_aer(void)
 	pcie_aer_disable = 1;	/* has priority over 'forceload' */
 }
 
+bool pci_aer_available(void)
+{
+	return !pcie_aer_disable && pci_msi_enabled();
+}
+
 static int set_device_error_reporting(struct pci_dev *dev, void *data)
 {
 	bool enable = *((bool *)data);
@@ -411,9 +416,7 @@ static void aer_error_resume(struct pci_dev *dev)
  */
 static int __init aer_service_init(void)
 {
-	if (pcie_aer_disable)
-		return -ENXIO;
-	if (!pci_msi_enabled())
+	if (!pci_aer_available())
 		return -ENXIO;
 	return pcie_port_service_register(&aerdriver);
 }

drivers/pci/pcie/aer/aerdrv_acpi.c

@@ -19,42 +19,6 @@
 #include <acpi/apei.h>
 #include "aerdrv.h"
 
-/**
- * aer_osc_setup - run ACPI _OSC method
- * @pciedev: pcie_device which AER is being enabled on
- *
- * @return: Zero on success. Nonzero otherwise.
- *
- * Invoked when PCIe bus loads AER service driver. To avoid conflict with
- * BIOS AER support requires BIOS to yield AER control to OS native driver.
- **/
-int aer_osc_setup(struct pcie_device *pciedev)
-{
-	acpi_status status = AE_NOT_FOUND;
-	struct pci_dev *pdev = pciedev->port;
-	acpi_handle handle = NULL;
-
-	if (acpi_pci_disabled)
-		return -1;
-
-	handle = acpi_find_root_bridge_handle(pdev);
-	if (handle) {
-		status = acpi_pci_osc_control_set(handle,
-					OSC_PCI_EXPRESS_AER_CONTROL |
-					OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
-	}
-
-	if (ACPI_FAILURE(status)) {
-		dev_printk(KERN_DEBUG, &pciedev->device, "AER service couldn't "
-			   "init device: %s\n",
-			   (status == AE_SUPPORT || status == AE_NOT_FOUND) ?
-			   "no _OSC support" : "_OSC failed");
-		return -1;
-	}
-
-	return 0;
-}
-
 #ifdef CONFIG_ACPI_APEI
 static inline int hest_match_pci(struct acpi_hest_aer_common *p,
 				 struct pci_dev *pci)