Merge branch 'pci/hotplug' into next

* pci/hotplug:
  PCI: pciehp: Prevent NULL dereference during probe
  PCI: pciehp: Reduce PCIe slot_ctrl to 16 bits
  PCI: Configure *all* devices, not just hot-added ones
  PCI: Preserve MPS and MRRS when applying _HPX settings
  PCI: Apply _HPP settings to all hot-added PCI devices
  PCI: Preserve BIOS PCI_COMMAND_SERR and PCI_COMMAND_PARITY settings
  PCI: Apply _HPP settings to PCIe devices as well as PCI and PCI-X
  PCI: Remove unused pci_configure_slot()
  ACPI / hotplug / PCI: Remove pci_configure_slot() usage
  PCI: shpchp: Remove pci_configure_slot() usage
  PCI: pciehp: Remove pci_configure_slot() usage
  PCI: Add pci_configure_device() during enumeration
  PCI: Move pci_configure_slot() to drivers/pci/probe.c
  PCI: Shuffle pci-acpi.c functions to group them logically
  PCI: Whitespace cleanup in pci-acpi.c
  PCI: Move pci_get_hp_params() to drivers/pci/pci-acpi.c
  PCI: pciehp: Configure hot-added display devices
  PCI: Remove "no hotplug settings from platform" warning

drivers/pci/hotplug/Makefile

@@ -24,7 +24,7 @@ obj-$(CONFIG_HOTPLUG_PCI_S390)		+= s390_pci_hpc.o
 
 obj-$(CONFIG_HOTPLUG_PCI_ACPI_IBM)	+= acpiphp_ibm.o
 
-pci_hotplug-objs	:=	pci_hotplug_core.o pcihp_slot.o
+pci_hotplug-objs	:=	pci_hotplug_core.o
 
 ifdef CONFIG_HOTPLUG_PCI_CPCI
 pci_hotplug-objs	+=	cpci_hotplug_core.o	\

drivers/pci/hotplug/acpi_pcihp.c

@@ -46,215 +46,6 @@
 
 static bool debug_acpi;
 
-static acpi_status
-decode_type0_hpx_record(union acpi_object *record, struct hotplug_params *hpx)
-{
-	int i;
-	union acpi_object *fields = record->package.elements;
-	u32 revision = fields[1].integer.value;
-
-	switch (revision) {
-	case 1:
-		if (record->package.count != 6)
-			return AE_ERROR;
-		for (i = 2; i < 6; i++)
-			if (fields[i].type != ACPI_TYPE_INTEGER)
-				return AE_ERROR;
-		hpx->t0 = &hpx->type0_data;
-		hpx->t0->revision        = revision;
-		hpx->t0->cache_line_size = fields[2].integer.value;
-		hpx->t0->latency_timer   = fields[3].integer.value;
-		hpx->t0->enable_serr     = fields[4].integer.value;
-		hpx->t0->enable_perr     = fields[5].integer.value;
-		break;
-	default:
-		printk(KERN_WARNING
-		       "%s: Type 0 Revision %d record not supported\n",
-		       __func__, revision);
-		return AE_ERROR;
-	}
-	return AE_OK;
-}
-
-static acpi_status
-decode_type1_hpx_record(union acpi_object *record, struct hotplug_params *hpx)
-{
-	int i;
-	union acpi_object *fields = record->package.elements;
-	u32 revision = fields[1].integer.value;
-
-	switch (revision) {
-	case 1:
-		if (record->package.count != 5)
-			return AE_ERROR;
-		for (i = 2; i < 5; i++)
-			if (fields[i].type != ACPI_TYPE_INTEGER)
-				return AE_ERROR;
-		hpx->t1 = &hpx->type1_data;
-		hpx->t1->revision      = revision;
-		hpx->t1->max_mem_read  = fields[2].integer.value;
-		hpx->t1->avg_max_split = fields[3].integer.value;
-		hpx->t1->tot_max_split = fields[4].integer.value;
-		break;
-	default:
-		printk(KERN_WARNING
-		       "%s: Type 1 Revision %d record not supported\n",
-		       __func__, revision);
-		return AE_ERROR;
-	}
-	return AE_OK;
-}
-
-static acpi_status
-decode_type2_hpx_record(union acpi_object *record, struct hotplug_params *hpx)
-{
-	int i;
-	union acpi_object *fields = record->package.elements;
-	u32 revision = fields[1].integer.value;
-
-	switch (revision) {
-	case 1:
-		if (record->package.count != 18)
-			return AE_ERROR;
-		for (i = 2; i < 18; i++)
-			if (fields[i].type != ACPI_TYPE_INTEGER)
-				return AE_ERROR;
-		hpx->t2 = &hpx->type2_data;
-		hpx->t2->revision      = revision;
-		hpx->t2->unc_err_mask_and      = fields[2].integer.value;
-		hpx->t2->unc_err_mask_or       = fields[3].integer.value;
-		hpx->t2->unc_err_sever_and     = fields[4].integer.value;
-		hpx->t2->unc_err_sever_or      = fields[5].integer.value;
-		hpx->t2->cor_err_mask_and      = fields[6].integer.value;
-		hpx->t2->cor_err_mask_or       = fields[7].integer.value;
-		hpx->t2->adv_err_cap_and       = fields[8].integer.value;
-		hpx->t2->adv_err_cap_or        = fields[9].integer.value;
-		hpx->t2->pci_exp_devctl_and    = fields[10].integer.value;
-		hpx->t2->pci_exp_devctl_or     = fields[11].integer.value;
-		hpx->t2->pci_exp_lnkctl_and    = fields[12].integer.value;
-		hpx->t2->pci_exp_lnkctl_or     = fields[13].integer.value;
-		hpx->t2->sec_unc_err_sever_and = fields[14].integer.value;
-		hpx->t2->sec_unc_err_sever_or  = fields[15].integer.value;
-		hpx->t2->sec_unc_err_mask_and  = fields[16].integer.value;
-		hpx->t2->sec_unc_err_mask_or   = fields[17].integer.value;
-		break;
-	default:
-		printk(KERN_WARNING
-		       "%s: Type 2 Revision %d record not supported\n",
-		       __func__, revision);
-		return AE_ERROR;
-	}
-	return AE_OK;
-}
-
-static acpi_status
-acpi_run_hpx(acpi_handle handle, struct hotplug_params *hpx)
-{
-	acpi_status status;
-	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
-	union acpi_object *package, *record, *fields;
-	u32 type;
-	int i;
-
-	/* Clear the return buffer with zeros */
-	memset(hpx, 0, sizeof(struct hotplug_params));
-
-	status = acpi_evaluate_object(handle, "_HPX", NULL, &buffer);
-	if (ACPI_FAILURE(status))
-		return status;
-
-	package = (union acpi_object *)buffer.pointer;
-	if (package->type != ACPI_TYPE_PACKAGE) {
-		status = AE_ERROR;
-		goto exit;
-	}
-
-	for (i = 0; i < package->package.count; i++) {
-		record = &package->package.elements[i];
-		if (record->type != ACPI_TYPE_PACKAGE) {
-			status = AE_ERROR;
-			goto exit;
-		}
-
-		fields = record->package.elements;
-		if (fields[0].type != ACPI_TYPE_INTEGER ||
-		    fields[1].type != ACPI_TYPE_INTEGER) {
-			status = AE_ERROR;
-			goto exit;
-		}
-
-		type = fields[0].integer.value;
-		switch (type) {
-		case 0:
-			status = decode_type0_hpx_record(record, hpx);
-			if (ACPI_FAILURE(status))
-				goto exit;
-			break;
-		case 1:
-			status = decode_type1_hpx_record(record, hpx);
-			if (ACPI_FAILURE(status))
-				goto exit;
-			break;
-		case 2:
-			status = decode_type2_hpx_record(record, hpx);
-			if (ACPI_FAILURE(status))
-				goto exit;
-			break;
-		default:
-			printk(KERN_ERR "%s: Type %d record not supported\n",
-			       __func__, type);
-			status = AE_ERROR;
-			goto exit;
-		}
-	}
- exit:
-	kfree(buffer.pointer);
-	return status;
-}
-
-static acpi_status
-acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
-{
-	acpi_status status;
-	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-	union acpi_object *package, *fields;
-	int i;
-
-	memset(hpp, 0, sizeof(struct hotplug_params));
-
-	status = acpi_evaluate_object(handle, "_HPP", NULL, &buffer);
-	if (ACPI_FAILURE(status))
-		return status;
-
-	package = (union acpi_object *) buffer.pointer;
-	if (package->type != ACPI_TYPE_PACKAGE ||
-	    package->package.count != 4) {
-		status = AE_ERROR;
-		goto exit;
-	}
-
-	fields = package->package.elements;
-	for (i = 0; i < 4; i++) {
-		if (fields[i].type != ACPI_TYPE_INTEGER) {
-			status = AE_ERROR;
-			goto exit;
-		}
-	}
-
-	hpp->t0 = &hpp->type0_data;
-	hpp->t0->revision        = 1;
-	hpp->t0->cache_line_size = fields[0].integer.value;
-	hpp->t0->latency_timer   = fields[1].integer.value;
-	hpp->t0->enable_serr     = fields[2].integer.value;
-	hpp->t0->enable_perr     = fields[3].integer.value;
-
-exit:
-	kfree(buffer.pointer);
-	return status;
-}
-
-
-
 /* acpi_run_oshp - get control of hotplug from the firmware
  *
  * @handle - the handle of the hotplug controller.
@@ -283,48 +74,6 @@ static acpi_status acpi_run_oshp(acpi_handle handle)
 	return status;
 }
 
-/* pci_get_hp_params
- *
- * @dev - the pci_dev for which we want parameters
- * @hpp - allocated by the caller
- */
-int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp)
-{
-	acpi_status status;
-	acpi_handle handle, phandle;
-	struct pci_bus *pbus;
-
-	handle = NULL;
-	for (pbus = dev->bus; pbus; pbus = pbus->parent) {
-		handle = acpi_pci_get_bridge_handle(pbus);
-		if (handle)
-			break;
-	}
-
-	/*
-	 * _HPP settings apply to all child buses, until another _HPP is
-	 * encountered. If we don't find an _HPP for the input pci dev,
-	 * look for it in the parent device scope since that would apply to
-	 * this pci dev.
-	 */
-	while (handle) {
-		status = acpi_run_hpx(handle, hpp);
-		if (ACPI_SUCCESS(status))
-			return 0;
-		status = acpi_run_hpp(handle, hpp);
-		if (ACPI_SUCCESS(status))
-			return 0;
-		if (acpi_is_root_bridge(handle))
-			break;
-		status = acpi_get_parent(handle, &phandle);
-		if (ACPI_FAILURE(status))
-			break;
-		handle = phandle;
-	}
-	return -ENODEV;
-}
-EXPORT_SYMBOL_GPL(pci_get_hp_params);
-
 /**
  * acpi_get_hp_hw_control_from_firmware
  * @dev: the pci_dev of the bridge that has a hotplug controller

drivers/pci/hotplug/acpiphp_glue.c

@@ -61,7 +61,6 @@ static DEFINE_MUTEX(bridge_mutex);
 static int acpiphp_hotplug_notify(struct acpi_device *adev, u32 type);
 static void acpiphp_post_dock_fixup(struct acpi_device *adev);
 static void acpiphp_sanitize_bus(struct pci_bus *bus);
-static void acpiphp_set_hpp_values(struct pci_bus *bus);
 static void hotplug_event(u32 type, struct acpiphp_context *context);
 static void free_bridge(struct kref *kref);
 
@@ -510,7 +509,7 @@ static void enable_slot(struct acpiphp_slot *slot)
 	__pci_bus_assign_resources(bus, &add_list, NULL);
 
 	acpiphp_sanitize_bus(bus);
-	acpiphp_set_hpp_values(bus);
+	pcie_bus_configure_settings(bus);
 	acpiphp_set_acpi_region(slot);
 
 	list_for_each_entry(dev, &bus->devices, bus_list) {
@@ -702,14 +701,6 @@ static void acpiphp_check_bridge(struct acpiphp_bridge *bridge)
 	}
 }
 
-static void acpiphp_set_hpp_values(struct pci_bus *bus)
-{
-	struct pci_dev *dev;
-
-	list_for_each_entry(dev, &bus->devices, bus_list)
-		pci_configure_slot(dev);
-}
-
 /*
  * Remove devices for which we could not assign resources, call
  * arch specific code to fix-up the bus

drivers/pci/hotplug/pciehp.h

@@ -92,7 +92,7 @@ struct controller {
 	struct slot *slot;
 	wait_queue_head_t queue;	/* sleep & wake process */
 	u32 slot_cap;
-	u32 slot_ctrl;
+	u16 slot_ctrl;
 	struct timer_list poll_timer;
 	unsigned long cmd_started;	/* jiffies */
 	unsigned int cmd_busy:1;

drivers/pci/hotplug/pciehp_core.c

@@ -262,6 +262,13 @@ static int pciehp_probe(struct pcie_device *dev)
 		goto err_out_none;
 	}
 
+	if (!dev->port->subordinate) {
+		/* Can happen if we run out of bus numbers during probe */
+		dev_err(&dev->device,
+			"Hotplug bridge without secondary bus, ignoring\n");
+		goto err_out_none;
+	}
+
 	ctrl = pcie_init(dev);
 	if (!ctrl) {
 		dev_err(&dev->device, "Controller initialization failed\n");

drivers/pci/hotplug/pciehp_hpc.c

@@ -171,7 +171,7 @@ static void pcie_wait_cmd(struct controller *ctrl)
 	 * interrupts.
 	 */
 	if (!rc)
-		ctrl_info(ctrl, "Timeout on hotplug command %#010x (issued %u msec ago)\n",
+		ctrl_info(ctrl, "Timeout on hotplug command %#06x (issued %u msec ago)\n",
 			  ctrl->slot_ctrl,
 			  jiffies_to_msecs(now - ctrl->cmd_started));
 }

drivers/pci/hotplug/pciehp_pci.c

@@ -65,14 +65,7 @@ int pciehp_configure_device(struct slot *p_slot)
 			pci_hp_add_bridge(dev);
 
 	pci_assign_unassigned_bridge_resources(bridge);
-
-	list_for_each_entry(dev, &parent->devices, bus_list) {
-		if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY)
-			continue;
-
-		pci_configure_slot(dev);
-	}
-
+	pcie_bus_configure_settings(parent);
 	pci_bus_add_devices(parent);
 
  out:

drivers/pci/hotplug/pcihp_slot.c

@@ -1,180 +0,0 @@
-/*
- * Copyright (C) 1995,2001 Compaq Computer Corporation
- * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2001 IBM Corp.
- * Copyright (C) 2003-2004 Intel Corporation
- * (c) Copyright 2009 Hewlett-Packard Development Company, L.P.
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT.  See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/pci.h>
-#include <linux/export.h>
-#include <linux/pci_hotplug.h>
-
-static struct hpp_type0 pci_default_type0 = {
-	.revision = 1,
-	.cache_line_size = 8,
-	.latency_timer = 0x40,
-	.enable_serr = 0,
-	.enable_perr = 0,
-};
-
-static void program_hpp_type0(struct pci_dev *dev, struct hpp_type0 *hpp)
-{
-	u16 pci_cmd, pci_bctl;
-
-	if (!hpp) {
-		/*
-		 * Perhaps we *should* use default settings for PCIe, but
-		 * pciehp didn't, so we won't either.
-		 */
-		if (pci_is_pcie(dev))
-			return;
-		dev_info(&dev->dev, "using default PCI settings\n");
-		hpp = &pci_default_type0;
-	}
-
-	if (hpp->revision > 1) {
-		dev_warn(&dev->dev,
-			 "PCI settings rev %d not supported; using defaults\n",
-			 hpp->revision);
-		hpp = &pci_default_type0;
-	}
-
-	pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, hpp->cache_line_size);
-	pci_write_config_byte(dev, PCI_LATENCY_TIMER, hpp->latency_timer);
-	pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
-	if (hpp->enable_serr)
-		pci_cmd |= PCI_COMMAND_SERR;
-	else
-		pci_cmd &= ~PCI_COMMAND_SERR;
-	if (hpp->enable_perr)
-		pci_cmd |= PCI_COMMAND_PARITY;
-	else
-		pci_cmd &= ~PCI_COMMAND_PARITY;
-	pci_write_config_word(dev, PCI_COMMAND, pci_cmd);
-
-	/* Program bridge control value */
-	if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
-		pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER,
-				      hpp->latency_timer);
-		pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
-		if (hpp->enable_serr)
-			pci_bctl |= PCI_BRIDGE_CTL_SERR;
-		else
-			pci_bctl &= ~PCI_BRIDGE_CTL_SERR;
-		if (hpp->enable_perr)
-			pci_bctl |= PCI_BRIDGE_CTL_PARITY;
-		else
-			pci_bctl &= ~PCI_BRIDGE_CTL_PARITY;
-		pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl);
-	}
-}
-
-static void program_hpp_type1(struct pci_dev *dev, struct hpp_type1 *hpp)
-{
-	if (hpp)
-		dev_warn(&dev->dev, "PCI-X settings not supported\n");
-}
-
-static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
-{
-	int pos;
-	u32 reg32;
-
-	if (!hpp)
-		return;
-
-	if (hpp->revision > 1) {
-		dev_warn(&dev->dev, "PCIe settings rev %d not supported\n",
-			 hpp->revision);
-		return;
-	}
-
-	/* Initialize Device Control Register */
-	pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL,
-			~hpp->pci_exp_devctl_and, hpp->pci_exp_devctl_or);
-
-	/* Initialize Link Control Register */
-	if (dev->subordinate)
-		pcie_capability_clear_and_set_word(dev, PCI_EXP_LNKCTL,
-			~hpp->pci_exp_lnkctl_and, hpp->pci_exp_lnkctl_or);
-
-	/* Find Advanced Error Reporting Enhanced Capability */
-	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
-	if (!pos)
-		return;
-
-	/* Initialize Uncorrectable Error Mask Register */
-	pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, &reg32);
-	reg32 = (reg32 & hpp->unc_err_mask_and) | hpp->unc_err_mask_or;
-	pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, reg32);
-
-	/* Initialize Uncorrectable Error Severity Register */
-	pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &reg32);
-	reg32 = (reg32 & hpp->unc_err_sever_and) | hpp->unc_err_sever_or;
-	pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, reg32);
-
-	/* Initialize Correctable Error Mask Register */
-	pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &reg32);
-	reg32 = (reg32 & hpp->cor_err_mask_and) | hpp->cor_err_mask_or;
-	pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, reg32);
-
-	/* Initialize Advanced Error Capabilities and Control Register */
-	pci_read_config_dword(dev, pos + PCI_ERR_CAP, &reg32);
-	reg32 = (reg32 & hpp->adv_err_cap_and) | hpp->adv_err_cap_or;
-	pci_write_config_dword(dev, pos + PCI_ERR_CAP, reg32);
-
-	/*
-	 * FIXME: The following two registers are not supported yet.
-	 *
-	 *   o Secondary Uncorrectable Error Severity Register
-	 *   o Secondary Uncorrectable Error Mask Register
-	 */
-}
-
-void pci_configure_slot(struct pci_dev *dev)
-{
-	struct pci_dev *cdev;
-	struct hotplug_params hpp;
-	int ret;
-
-	if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL ||
-			(dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
-			(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
-		return;
-
-	pcie_bus_configure_settings(dev->bus);
-
-	memset(&hpp, 0, sizeof(hpp));
-	ret = pci_get_hp_params(dev, &hpp);
-	if (ret)
-		dev_warn(&dev->dev, "no hotplug settings from platform\n");
-
-	program_hpp_type2(dev, hpp.t2);
-	program_hpp_type1(dev, hpp.t1);
-	program_hpp_type0(dev, hpp.t0);
-
-	if (dev->subordinate) {
-		list_for_each_entry(cdev, &dev->subordinate->devices,
-				    bus_list)
-			pci_configure_slot(cdev);
-	}
-}
-EXPORT_SYMBOL_GPL(pci_configure_slot);

drivers/pci/hotplug/shpchp_pci.c

@@ -69,13 +69,7 @@ int shpchp_configure_device(struct slot *p_slot)
 	}
 
 	pci_assign_unassigned_bridge_resources(bridge);
-
-	list_for_each_entry(dev, &parent->devices, bus_list) {
-		if (PCI_SLOT(dev->devfn) != p_slot->device)
-			continue;
-		pci_configure_slot(dev);
-	}
-
+	pcie_bus_configure_settings(parent);
 	pci_bus_add_devices(parent);
 
  out:

drivers/pci/pci-acpi.c

@@ -10,6 +10,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/pci.h>
+#include <linux/pci_hotplug.h>
 #include <linux/module.h>
 #include <linux/pci-aspm.h>
 #include <linux/pci-acpi.h>
@@ -17,6 +18,267 @@
 #include <linux/pm_qos.h>
 #include "pci.h"
 
+phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
+{
+	acpi_status status = AE_NOT_EXIST;
+	unsigned long long mcfg_addr;
+
+	if (handle)
+		status = acpi_evaluate_integer(handle, METHOD_NAME__CBA,
+					       NULL, &mcfg_addr);
+	if (ACPI_FAILURE(status))
+		return 0;
+
+	return (phys_addr_t)mcfg_addr;
+}
+
+static acpi_status decode_type0_hpx_record(union acpi_object *record,
+					   struct hotplug_params *hpx)
+{
+	int i;
+	union acpi_object *fields = record->package.elements;
+	u32 revision = fields[1].integer.value;
+
+	switch (revision) {
+	case 1:
+		if (record->package.count != 6)
+			return AE_ERROR;
+		for (i = 2; i < 6; i++)
+			if (fields[i].type != ACPI_TYPE_INTEGER)
+				return AE_ERROR;
+		hpx->t0 = &hpx->type0_data;
+		hpx->t0->revision        = revision;
+		hpx->t0->cache_line_size = fields[2].integer.value;
+		hpx->t0->latency_timer   = fields[3].integer.value;
+		hpx->t0->enable_serr     = fields[4].integer.value;
+		hpx->t0->enable_perr     = fields[5].integer.value;
+		break;
+	default:
+		printk(KERN_WARNING
+		       "%s: Type 0 Revision %d record not supported\n",
+		       __func__, revision);
+		return AE_ERROR;
+	}
+	return AE_OK;
+}
+
+static acpi_status decode_type1_hpx_record(union acpi_object *record,
+					   struct hotplug_params *hpx)
+{
+	int i;
+	union acpi_object *fields = record->package.elements;
+	u32 revision = fields[1].integer.value;
+
+	switch (revision) {
+	case 1:
+		if (record->package.count != 5)
+			return AE_ERROR;
+		for (i = 2; i < 5; i++)
+			if (fields[i].type != ACPI_TYPE_INTEGER)
+				return AE_ERROR;
+		hpx->t1 = &hpx->type1_data;
+		hpx->t1->revision      = revision;
+		hpx->t1->max_mem_read  = fields[2].integer.value;
+		hpx->t1->avg_max_split = fields[3].integer.value;
+		hpx->t1->tot_max_split = fields[4].integer.value;
+		break;
+	default:
+		printk(KERN_WARNING
+		       "%s: Type 1 Revision %d record not supported\n",
+		       __func__, revision);
+		return AE_ERROR;
+	}
+	return AE_OK;
+}
+
+static acpi_status decode_type2_hpx_record(union acpi_object *record,
+					   struct hotplug_params *hpx)
+{
+	int i;
+	union acpi_object *fields = record->package.elements;
+	u32 revision = fields[1].integer.value;
+
+	switch (revision) {
+	case 1:
+		if (record->package.count != 18)
+			return AE_ERROR;
+		for (i = 2; i < 18; i++)
+			if (fields[i].type != ACPI_TYPE_INTEGER)
+				return AE_ERROR;
+		hpx->t2 = &hpx->type2_data;
+		hpx->t2->revision      = revision;
+		hpx->t2->unc_err_mask_and      = fields[2].integer.value;
+		hpx->t2->unc_err_mask_or       = fields[3].integer.value;
+		hpx->t2->unc_err_sever_and     = fields[4].integer.value;
+		hpx->t2->unc_err_sever_or      = fields[5].integer.value;
+		hpx->t2->cor_err_mask_and      = fields[6].integer.value;
+		hpx->t2->cor_err_mask_or       = fields[7].integer.value;
+		hpx->t2->adv_err_cap_and       = fields[8].integer.value;
+		hpx->t2->adv_err_cap_or        = fields[9].integer.value;
+		hpx->t2->pci_exp_devctl_and    = fields[10].integer.value;
+		hpx->t2->pci_exp_devctl_or     = fields[11].integer.value;
+		hpx->t2->pci_exp_lnkctl_and    = fields[12].integer.value;
+		hpx->t2->pci_exp_lnkctl_or     = fields[13].integer.value;
+		hpx->t2->sec_unc_err_sever_and = fields[14].integer.value;
+		hpx->t2->sec_unc_err_sever_or  = fields[15].integer.value;
+		hpx->t2->sec_unc_err_mask_and  = fields[16].integer.value;
+		hpx->t2->sec_unc_err_mask_or   = fields[17].integer.value;
+		break;
+	default:
+		printk(KERN_WARNING
+		       "%s: Type 2 Revision %d record not supported\n",
+		       __func__, revision);
+		return AE_ERROR;
+	}
+	return AE_OK;
+}
+
+static acpi_status acpi_run_hpx(acpi_handle handle, struct hotplug_params *hpx)
+{
+	acpi_status status;
+	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+	union acpi_object *package, *record, *fields;
+	u32 type;
+	int i;
+
+	/* Clear the return buffer with zeros */
+	memset(hpx, 0, sizeof(struct hotplug_params));
+
+	status = acpi_evaluate_object(handle, "_HPX", NULL, &buffer);
+	if (ACPI_FAILURE(status))
+		return status;
+
+	package = (union acpi_object *)buffer.pointer;
+	if (package->type != ACPI_TYPE_PACKAGE) {
+		status = AE_ERROR;
+		goto exit;
+	}
+
+	for (i = 0; i < package->package.count; i++) {
+		record = &package->package.elements[i];
+		if (record->type != ACPI_TYPE_PACKAGE) {
+			status = AE_ERROR;
+			goto exit;
+		}
+
+		fields = record->package.elements;
+		if (fields[0].type != ACPI_TYPE_INTEGER ||
+		    fields[1].type != ACPI_TYPE_INTEGER) {
+			status = AE_ERROR;
+			goto exit;
+		}
+
+		type = fields[0].integer.value;
+		switch (type) {
+		case 0:
+			status = decode_type0_hpx_record(record, hpx);
+			if (ACPI_FAILURE(status))
+				goto exit;
+			break;
+		case 1:
+			status = decode_type1_hpx_record(record, hpx);
+			if (ACPI_FAILURE(status))
+				goto exit;
+			break;
+		case 2:
+			status = decode_type2_hpx_record(record, hpx);
+			if (ACPI_FAILURE(status))
+				goto exit;
+			break;
+		default:
+			printk(KERN_ERR "%s: Type %d record not supported\n",
+			       __func__, type);
+			status = AE_ERROR;
+			goto exit;
+		}
+	}
+ exit:
+	kfree(buffer.pointer);
+	return status;
+}
+
+static acpi_status acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
+{
+	acpi_status status;
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object *package, *fields;
+	int i;
+
+	memset(hpp, 0, sizeof(struct hotplug_params));
+
+	status = acpi_evaluate_object(handle, "_HPP", NULL, &buffer);
+	if (ACPI_FAILURE(status))
+		return status;
+
+	package = (union acpi_object *) buffer.pointer;
+	if (package->type != ACPI_TYPE_PACKAGE ||
+	    package->package.count != 4) {
+		status = AE_ERROR;
+		goto exit;
+	}
+
+	fields = package->package.elements;
+	for (i = 0; i < 4; i++) {
+		if (fields[i].type != ACPI_TYPE_INTEGER) {
+			status = AE_ERROR;
+			goto exit;
+		}
+	}
+
+	hpp->t0 = &hpp->type0_data;
+	hpp->t0->revision        = 1;
+	hpp->t0->cache_line_size = fields[0].integer.value;
+	hpp->t0->latency_timer   = fields[1].integer.value;
+	hpp->t0->enable_serr     = fields[2].integer.value;
+	hpp->t0->enable_perr     = fields[3].integer.value;
+
+exit:
+	kfree(buffer.pointer);
+	return status;
+}
+
+/* pci_get_hp_params
+ *
+ * @dev - the pci_dev for which we want parameters
+ * @hpp - allocated by the caller
+ */
+int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp)
+{
+	acpi_status status;
+	acpi_handle handle, phandle;
+	struct pci_bus *pbus;
+
+	handle = NULL;
+	for (pbus = dev->bus; pbus; pbus = pbus->parent) {
+		handle = acpi_pci_get_bridge_handle(pbus);
+		if (handle)
+			break;
+	}
+
+	/*
+	 * _HPP settings apply to all child buses, until another _HPP is
+	 * encountered. If we don't find an _HPP for the input pci dev,
+	 * look for it in the parent device scope since that would apply to
+	 * this pci dev.
+	 */
+	while (handle) {
+		status = acpi_run_hpx(handle, hpp);
+		if (ACPI_SUCCESS(status))
+			return 0;
+		status = acpi_run_hpp(handle, hpp);
+		if (ACPI_SUCCESS(status))
+			return 0;
+		if (acpi_is_root_bridge(handle))
+			break;
+		status = acpi_get_parent(handle, &phandle);
+		if (ACPI_FAILURE(status))
+			break;
+		handle = phandle;
+	}
+	return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(pci_get_hp_params);
+
 /**
  * pci_acpi_wake_bus - Root bus wakeup notification fork function.
  * @work: Work item to handle.
@@ -84,20 +346,6 @@ acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev,
 	return acpi_add_pm_notifier(dev, &pci_dev->dev, pci_acpi_wake_dev);
 }
 
-phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
-{
-	acpi_status status = AE_NOT_EXIST;
-	unsigned long long mcfg_addr;
-
-	if (handle)
-		status = acpi_evaluate_integer(handle, METHOD_NAME__CBA,
-					       NULL, &mcfg_addr);
-	if (ACPI_FAILURE(status))
-		return 0;
-
-	return (phys_addr_t)mcfg_addr;
-}
-
 /*
  * _SxD returns the D-state with the highest power
  * (lowest D-state number) supported in the S-state "x".

drivers/pci/probe.c

@@ -6,6 +6,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/pci.h>
+#include <linux/pci_hotplug.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/cpumask.h>
@@ -1249,6 +1250,137 @@ int pci_setup_device(struct pci_dev *dev)
 	return 0;
 }
 
+static struct hpp_type0 pci_default_type0 = {
+	.revision = 1,
+	.cache_line_size = 8,
+	.latency_timer = 0x40,
+	.enable_serr = 0,
+	.enable_perr = 0,
+};
+
+static void program_hpp_type0(struct pci_dev *dev, struct hpp_type0 *hpp)
+{
+	u16 pci_cmd, pci_bctl;
+
+	if (!hpp)
+		hpp = &pci_default_type0;
+
+	if (hpp->revision > 1) {
+		dev_warn(&dev->dev,
+			 "PCI settings rev %d not supported; using defaults\n",
+			 hpp->revision);
+		hpp = &pci_default_type0;
+	}
+
+	pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, hpp->cache_line_size);
+	pci_write_config_byte(dev, PCI_LATENCY_TIMER, hpp->latency_timer);
+	pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
+	if (hpp->enable_serr)
+		pci_cmd |= PCI_COMMAND_SERR;
+	if (hpp->enable_perr)
+		pci_cmd |= PCI_COMMAND_PARITY;
+	pci_write_config_word(dev, PCI_COMMAND, pci_cmd);
+
+	/* Program bridge control value */
+	if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
+		pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER,
+				      hpp->latency_timer);
+		pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
+		if (hpp->enable_serr)
+			pci_bctl |= PCI_BRIDGE_CTL_SERR;
+		if (hpp->enable_perr)
+			pci_bctl |= PCI_BRIDGE_CTL_PARITY;
+		pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl);
+	}
+}
+
+static void program_hpp_type1(struct pci_dev *dev, struct hpp_type1 *hpp)
+{
+	if (hpp)
+		dev_warn(&dev->dev, "PCI-X settings not supported\n");
+}
+
+static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
+{
+	int pos;
+	u32 reg32;
+
+	if (!hpp)
+		return;
+
+	if (hpp->revision > 1) {
+		dev_warn(&dev->dev, "PCIe settings rev %d not supported\n",
+			 hpp->revision);
+		return;
+	}
+
+	/*
+	 * Don't allow _HPX to change MPS or MRRS settings.  We manage
+	 * those to make sure they're consistent with the rest of the
+	 * platform.
+	 */
+	hpp->pci_exp_devctl_and |= PCI_EXP_DEVCTL_PAYLOAD |
+				    PCI_EXP_DEVCTL_READRQ;
+	hpp->pci_exp_devctl_or &= ~(PCI_EXP_DEVCTL_PAYLOAD |
+				    PCI_EXP_DEVCTL_READRQ);
+
+	/* Initialize Device Control Register */
+	pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL,
+			~hpp->pci_exp_devctl_and, hpp->pci_exp_devctl_or);
+
+	/* Initialize Link Control Register */
+	if (dev->subordinate)
+		pcie_capability_clear_and_set_word(dev, PCI_EXP_LNKCTL,
+			~hpp->pci_exp_lnkctl_and, hpp->pci_exp_lnkctl_or);
+
+	/* Find Advanced Error Reporting Enhanced Capability */
+	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
+	if (!pos)
+		return;
+
+	/* Initialize Uncorrectable Error Mask Register */
+	pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, &reg32);
+	reg32 = (reg32 & hpp->unc_err_mask_and) | hpp->unc_err_mask_or;
+	pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, reg32);
+
+	/* Initialize Uncorrectable Error Severity Register */
+	pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &reg32);
+	reg32 = (reg32 & hpp->unc_err_sever_and) | hpp->unc_err_sever_or;
+	pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, reg32);
+
+	/* Initialize Correctable Error Mask Register */
+	pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &reg32);
+	reg32 = (reg32 & hpp->cor_err_mask_and) | hpp->cor_err_mask_or;
+	pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, reg32);
+
+	/* Initialize Advanced Error Capabilities and Control Register */
+	pci_read_config_dword(dev, pos + PCI_ERR_CAP, &reg32);
+	reg32 = (reg32 & hpp->adv_err_cap_and) | hpp->adv_err_cap_or;
+	pci_write_config_dword(dev, pos + PCI_ERR_CAP, reg32);
+
+	/*
+	 * FIXME: The following two registers are not supported yet.
+	 *
+	 *   o Secondary Uncorrectable Error Severity Register
+	 *   o Secondary Uncorrectable Error Mask Register
+	 */
+}
+
+static void pci_configure_device(struct pci_dev *dev)
+{
+	struct hotplug_params hpp;
+	int ret;
+
+	memset(&hpp, 0, sizeof(hpp));
+	ret = pci_get_hp_params(dev, &hpp);
+	if (ret)
+		return;
+
+	program_hpp_type2(dev, hpp.t2);
+	program_hpp_type1(dev, hpp.t1);
+	program_hpp_type0(dev, hpp.t0);
+}
+
 static void pci_release_capabilities(struct pci_dev *dev)
 {
 	pci_vpd_release(dev);
@@ -1391,6 +1523,8 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 {
 	int ret;
 
+	pci_configure_device(dev);
+
 	device_initialize(&dev->dev);
 	dev->dev.release = pci_release_dev;
 

include/linux/pci_hotplug.h

@@ -187,6 +187,4 @@ static inline int pci_get_hp_params(struct pci_dev *dev,
 	return -ENODEV;
 }
 #endif
-
-void pci_configure_slot(struct pci_dev *dev);
 #endif