From patchwork Mon Aug 2 21:56:30 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rafael Wysocki X-Patchwork-Id: 116613 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o72M2uY0020039 for ; Mon, 2 Aug 2010 22:02:56 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752042Ab0HBWCz (ORCPT ); Mon, 2 Aug 2010 18:02:55 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:57743 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755068Ab0HBWCv (ORCPT ); Mon, 2 Aug 2010 18:02:51 -0400 Received: from localhost (localhost.localdomain [127.0.0.1]) by ogre.sisk.pl (Postfix) with ESMTP id 0056B18E233; Mon, 2 Aug 2010 23:56:39 +0200 (CEST) Received: from ogre.sisk.pl ([127.0.0.1]) by localhost (ogre.sisk.pl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 30808-08; Mon, 2 Aug 2010 23:56:12 +0200 (CEST) Received: from ferrari.localnet (220-bem-13.acn.waw.pl [82.210.184.220]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ogre.sisk.pl (Postfix) with ESMTP id 4115A18E333; Mon, 2 Aug 2010 23:55:58 +0200 (CEST) From: "Rafael J. Wysocki" To: Jesse Barnes Subject: [PATCH 4/8] PCI / PCIe: Ask BIOS for control of all native services at once (v6) Date: Mon, 2 Aug 2010 23:56:30 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.35-rjw+; KDE/4.4.4; x86_64; ; ) Cc: ACPI Devel Maling List , Len Brown , linux-pm@lists.linux-foundation.org, linux-pci@vger.kernel.org, Hidetoshi Seto , Kenji Kaneshige , Matthew Garrett References: <201008022351.31406.rjw@sisk.pl> In-Reply-To: <201008022351.31406.rjw@sisk.pl> MIME-Version: 1.0 Message-Id: <201008022356.31166.rjw@sisk.pl> X-Virus-Scanned: amavisd-new at ogre.sisk.pl using MkS_Vir for Linux Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Mon, 02 Aug 2010 22:02:56 +0000 (UTC) Index: linux-2.6/drivers/pci/pcie/portdrv_pci.c =================================================================== --- linux-2.6.orig/drivers/pci/pcie/portdrv_pci.c +++ linux-2.6/drivers/pci/pcie/portdrv_pci.c @@ -32,10 +32,23 @@ MODULE_LICENSE("GPL"); /* If this switch is set, PCIe port native services should not be enabled. */ bool pcie_ports_disabled; +/* + * If this switch is set, ACPI _OSC will be used to determine whether or not to + * enable PCIe port native services. + */ +bool pcie_ports_auto = true; + static int __init pcie_port_setup(char *str) { - if (!strncmp(str, "compat", 6)) + if (!strncmp(str, "compat", 6)) { pcie_ports_disabled = true; + } else if (!strncmp(str, "native", 6)) { + pcie_ports_disabled = false; + pcie_ports_auto = false; + } else if (!strncmp(str, "auto", 4)) { + pcie_ports_disabled = false; + pcie_ports_auto = true; + } return 1; } Index: linux-2.6/drivers/pci/pcie/portdrv_acpi.c =================================================================== --- /dev/null +++ linux-2.6/drivers/pci/pcie/portdrv_acpi.c @@ -0,0 +1,87 @@ +/* + * PCIe Port Native Services Support, ACPI-Related Part + * + * Copyright (C) 2010 Rafael J. Wysocki , Novell Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License V2. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include +#include +#include + +#include "aer/aerdrv.h" +#include "../pci.h" + +/** + * pcie_port_acpi_setup - Request the BIOS to release control of PCIe services. + * @port: PCIe Port service for a root port or event collector. + * @srv_mask: Bit mask of services that can be enabled for @port. + * + * Invoked when @port is identified as a PCIe port device. To avoid conflicts + * with the BIOS PCIe port native services support requires the BIOS to yield + * control of these services to the kernel. The mask of services that the BIOS + * allows to be enabled for @port is written to @srv_mask. + * + * NOTE: It turns out that we cannot do that for individual port services + * separately, because that would make some systems work incorrectly. + */ +int pcie_port_acpi_setup(struct pci_dev *port, int *srv_mask) +{ + acpi_status status; + acpi_handle handle; + u32 flags; + + if (acpi_pci_disabled) + return 0; + + handle = acpi_find_root_bridge_handle(port); + if (!handle) + return -EINVAL; + + flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL + | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL + | OSC_PCI_EXPRESS_PME_CONTROL; + + if (pcie_aer_get_firmware_first(port)) + dev_dbg(&port->dev, "PCIe errors handled by BIOS.\n"); + else if (pci_aer_available()) + flags |= OSC_PCI_EXPRESS_AER_CONTROL; + + status = acpi_pci_osc_control_query(handle, &flags); + if (ACPI_FAILURE(status)) { + dev_dbg(&port->dev, "ACPI _OSC query failed (code %d)\n", + status); + return -ENODEV; + } + + if (!(flags & OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL)) { + dev_dbg(&port->dev, "BIOS refuses to grant control of PCIe " + "Capability Structure\n"); + return -EACCES; + } + + status = acpi_pci_osc_control_set(handle, flags); + if (ACPI_FAILURE(status)) { + dev_dbg(&port->dev, "ACPI _OSC request failed (code %d)\n", + status); + return -ENODEV; + } + + dev_info(&port->dev, "ACPI _OSC control granted for 0x%02x\n", flags); + + *srv_mask = PCIE_PORT_SERVICE_VC; + if (flags & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL) + *srv_mask |= PCIE_PORT_SERVICE_HP; + if (flags & OSC_PCI_EXPRESS_PME_CONTROL) + *srv_mask |= PCIE_PORT_SERVICE_PME; + if (flags & OSC_PCI_EXPRESS_AER_CONTROL) + *srv_mask |= PCIE_PORT_SERVICE_AER; + + return 0; +} Index: linux-2.6/drivers/pci/pcie/portdrv.h =================================================================== --- linux-2.6.orig/drivers/pci/pcie/portdrv.h +++ linux-2.6/drivers/pci/pcie/portdrv.h @@ -21,6 +21,7 @@ #define get_descriptor_id(type, service) (((type - 4) << 4) | service) extern bool pcie_ports_disabled; +extern bool pcie_ports_auto; extern struct bus_type pcie_port_bus_type; extern int pcie_port_device_register(struct pci_dev *dev); @@ -32,6 +33,8 @@ extern void pcie_port_device_remove(stru extern int __must_check pcie_port_bus_register(void); extern void pcie_port_bus_unregister(void); +struct pci_dev; + #ifdef CONFIG_PCIE_PME extern bool pcie_pme_msi_disabled; @@ -44,9 +47,26 @@ static inline bool pcie_pme_no_msi(void) { return pcie_pme_msi_disabled; } + +extern void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable); #else /* !CONFIG_PCIE_PME */ static inline void pcie_pme_disable_msi(void) {} static inline bool pcie_pme_no_msi(void) { return false; } +static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {} #endif /* !CONFIG_PCIE_PME */ +#ifdef CONFIG_ACPI +extern int pcie_port_acpi_setup(struct pci_dev *port, int *mask); + +static inline int pcie_port_platform_notify(struct pci_dev *port, int *mask) +{ + return pcie_port_acpi_setup(port, mask); +} +#else /* !CONFIG_ACPI */ +static inline int pcie_port_platform_notify(struct pci_dev *port, int *mask) +{ + return 0; +} +#endif /* !CONFIG_ACPI */ + #endif /* _PORTDRV_H_ */ Index: linux-2.6/drivers/pci/pcie/Makefile =================================================================== --- linux-2.6.orig/drivers/pci/pcie/Makefile +++ linux-2.6/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/pcie_pme.o Index: linux-2.6/drivers/pci/pcie/portdrv_core.c =================================================================== --- linux-2.6.orig/drivers/pci/pcie/portdrv_core.c +++ linux-2.6/drivers/pci/pcie/portdrv_core.c @@ -14,6 +14,7 @@ #include #include #include +#include #include "../pci.h" #include "portdrv.h" @@ -236,23 +237,38 @@ static int get_port_device_capability(st int services = 0, pos; u16 reg16; u32 reg32; + int cap_mask; + int err; + + err = pcie_port_platform_notify(dev, &cap_mask); + if (pcie_ports_auto) { + if (err) + return 0; + } else { + cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP + | PCIE_PORT_SERVICE_VC; + if (pci_aer_available()) + cap_mask |= PCIE_PORT_SERVICE_AER; + } pos = pci_pcie_cap(dev); pci_read_config_word(dev, pos + PCI_EXP_FLAGS, ®16); /* Hot-Plug Capable */ - if (reg16 & PCI_EXP_FLAGS_SLOT) { + if ((cap_mask & PCIE_PORT_SERVICE_HP) && (reg16 & PCI_EXP_FLAGS_SLOT)) { pci_read_config_dword(dev, pos + PCI_EXP_SLTCAP, ®32); if (reg32 & PCI_EXP_SLTCAP_HPC) services |= PCIE_PORT_SERVICE_HP; } /* AER capable */ - if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) + if ((cap_mask & PCIE_PORT_SERVICE_AER) + && pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) services |= PCIE_PORT_SERVICE_AER; /* VC support */ if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC)) services |= PCIE_PORT_SERVICE_VC; /* Root ports are capable of generating PME too */ - if (dev->pcie_type == PCI_EXP_TYPE_ROOT_PORT) + if ((cap_mask & PCIE_PORT_SERVICE_PME) + && dev->pcie_type == PCI_EXP_TYPE_ROOT_PORT) services |= PCIE_PORT_SERVICE_PME; return services; Index: linux-2.6/drivers/pci/pcie/pme/pcie_pme.c =================================================================== --- linux-2.6.orig/drivers/pci/pcie/pme/pcie_pme.c +++ linux-2.6/drivers/pci/pcie/pme/pcie_pme.c @@ -24,37 +24,12 @@ #include #include "../../pci.h" -#include "pcie_pme.h" +#include "../portdrv.h" #define PCI_EXP_RTSTA_PME 0x10000 /* PME status */ #define PCI_EXP_RTSTA_PENDING 0x20000 /* PME pending */ /* - * If set, this switch will prevent the PCIe root port PME service driver from - * being registered. Consequently, the interrupt-based PCIe PME signaling will - * not be used by any PCIe root ports in that case. - */ -static bool pcie_pme_disabled = true; - -/* - * The PCI Express Base Specification 2.0, Section 6.1.8, states the following: - * "In order to maintain compatibility with non-PCI Express-aware system - * software, system power management logic must be configured by firmware to use - * the legacy mechanism of signaling PME by default. PCI Express-aware system - * software must notify the firmware prior to enabling native, interrupt-based - * PME signaling." However, if the platform doesn't provide us with a suitable - * notification mechanism or the notification fails, it is not clear whether or - * not we are supposed to use the interrupt-based PCIe PME signaling. The - * switch below can be used to indicate the desired behaviour. When set, it - * will make the kernel use the interrupt-based PCIe PME signaling regardless of - * the platform notification status, although the kernel will attempt to notify - * the platform anyway. When unset, it will prevent the kernel from using the - * the interrupt-based PCIe PME signaling if the platform notification fails, - * which is the default. - */ -static bool pcie_pme_force_enable; - -/* * If this switch is set, MSI will not be used for PCIe PME signaling. This * causes the PCIe port driver to use INTx interrupts only, but it turns out * that using MSI for PCIe PME signaling doesn't play well with PCIe PME-based @@ -64,38 +39,13 @@ bool pcie_pme_msi_disabled; static int __init pcie_pme_setup(char *str) { - if (!strncmp(str, "auto", 4)) - pcie_pme_disabled = false; - else if (!strncmp(str, "force", 5)) - pcie_pme_force_enable = true; - - str = strchr(str, ','); - if (str) { - str++; - str += strspn(str, " \t"); - if (*str && !strcmp(str, "nomsi")) - pcie_pme_msi_disabled = true; - } + if (!strncmp(str, "nomsi", 5)) + pcie_pme_msi_disabled = true; return 1; } __setup("pcie_pme=", pcie_pme_setup); -/** - * pcie_pme_platform_setup - Ensure that the kernel controls the PCIe PME. - * @srv: PCIe PME root port service to use for carrying out the check. - * - * Notify the platform that the native PCIe PME is going to be used and return - * 'true' if the control of the PCIe PME registers has been acquired from the - * platform. - */ -static bool pcie_pme_platform_setup(struct pcie_device *srv) -{ - if (!pcie_pme_platform_notify(srv)) - return true; - return pcie_pme_force_enable; -} - struct pcie_pme_service_data { spinlock_t lock; struct pcie_device *srv; @@ -108,7 +58,7 @@ struct pcie_pme_service_data { * @dev: PCIe root port or event collector. * @enable: Enable or disable the interrupt. */ -static void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable) +void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable) { int rtctl_pos; u16 rtctl; @@ -417,9 +367,6 @@ static int pcie_pme_probe(struct pcie_de struct pcie_pme_service_data *data; int ret; - if (!pcie_pme_platform_setup(srv)) - return -EACCES; - data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; @@ -509,8 +456,7 @@ static struct pcie_port_service_driver p */ static int __init pcie_pme_service_init(void) { - return pcie_pme_disabled ? - -ENODEV : pcie_port_service_register(&pcie_pme_driver); + return pcie_port_service_register(&pcie_pme_driver); } module_init(pcie_pme_service_init); Index: linux-2.6/drivers/pci/pcie/pme/pcie_pme.h =================================================================== --- linux-2.6.orig/drivers/pci/pcie/pme/pcie_pme.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * drivers/pci/pcie/pme/pcie_pme.h - * - * PCI Express Root Port PME signaling support - * - * Copyright (C) 2009 Rafael J. Wysocki , Novell Inc. - */ - -#ifndef _PCIE_PME_H_ -#define _PCIE_PME_H_ - -struct pcie_device; - -#ifdef CONFIG_ACPI -extern int pcie_pme_acpi_setup(struct pcie_device *srv); - -static inline int pcie_pme_platform_notify(struct pcie_device *srv) -{ - return pcie_pme_acpi_setup(srv); -} -#else /* !CONFIG_ACPI */ -static inline int pcie_pme_platform_notify(struct pcie_device *srv) -{ - return 0; -} -#endif /* !CONFIG_ACPI */ - -#endif Index: linux-2.6/drivers/pci/pcie/pme/pcie_pme_acpi.c =================================================================== --- linux-2.6.orig/drivers/pci/pcie/pme/pcie_pme_acpi.c +++ /dev/null @@ -1,54 +0,0 @@ -/* - * PCIe Native PME support, ACPI-related part - * - * Copyright (C) 2009 Rafael J. Wysocki , Novell Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License V2. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include -#include -#include -#include -#include -#include - -/** - * pcie_pme_acpi_setup - Request the ACPI BIOS to release control over PCIe PME. - * @srv - PCIe PME service for a root port or event collector. - * - * Invoked when the PCIe bus type loads PCIe PME service driver. To avoid - * conflict with the BIOS PCIe support requires the BIOS to yield PCIe PME - * control to the kernel. - */ -int pcie_pme_acpi_setup(struct pcie_device *srv) -{ - acpi_status status = AE_NOT_FOUND; - struct pci_dev *port = srv->port; - acpi_handle handle; - int error = 0; - - if (acpi_pci_disabled) - return -ENOSYS; - - dev_info(&port->dev, "Requesting control of PCIe PME from ACPI BIOS\n"); - - handle = acpi_find_root_bridge_handle(port); - if (!handle) - return -EINVAL; - - status = acpi_pci_osc_control_set(handle, - OSC_PCI_EXPRESS_PME_CONTROL | - OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL); - if (ACPI_FAILURE(status)) { - dev_info(&port->dev, - "Failed to receive control of PCIe PME service: %s\n", - (status == AE_SUPPORT || status == AE_NOT_FOUND) ? - "no _OSC support" : "ACPI _OSC failed"); - error = -ENODEV; - } - - return error; -} Index: linux-2.6/drivers/pci/pcie/pme/Makefile =================================================================== --- linux-2.6.orig/drivers/pci/pcie/pme/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# -# Makefile for PCI-Express Root Port PME signaling driver -# - -obj-$(CONFIG_PCIE_PME) += pmedriver.o - -pmedriver-objs := pcie_pme.o -pmedriver-$(CONFIG_ACPI) += pcie_pme_acpi.o Index: linux-2.6/drivers/pci/pcie/aer/aerdrv_acpi.c =================================================================== --- linux-2.6.orig/drivers/pci/pcie/aer/aerdrv_acpi.c +++ linux-2.6/drivers/pci/pcie/aer/aerdrv_acpi.c @@ -19,42 +19,6 @@ #include #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) Index: linux-2.6/drivers/pci/pcie/aer/aerdrv_core.c =================================================================== --- linux-2.6.orig/drivers/pci/pcie/aer/aerdrv_core.c +++ linux-2.6/drivers/pci/pcie/aer/aerdrv_core.c @@ -771,22 +771,10 @@ void aer_isr(struct work_struct *work) */ int aer_init(struct pcie_device *dev) { - if (pcie_aer_get_firmware_first(dev->port)) { - dev_printk(KERN_DEBUG, &dev->device, - "PCIe errors handled by platform firmware.\n"); - goto out; - } - - if (aer_osc_setup(dev)) - goto out; - - return 0; -out: if (forceload) { dev_printk(KERN_DEBUG, &dev->device, "aerdrv forceload requested.\n"); pcie_aer_force_firmware_first(dev->port, 0); - return 0; } - return -ENXIO; + return 0; } Index: linux-2.6/drivers/pci/hotplug/acpi_pcihp.c =================================================================== --- linux-2.6.orig/drivers/pci/hotplug/acpi_pcihp.c +++ linux-2.6/drivers/pci/hotplug/acpi_pcihp.c @@ -338,9 +338,7 @@ int acpi_get_hp_hw_control_from_firmware 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; Index: linux-2.6/drivers/pci/hotplug/pciehp.h =================================================================== --- linux-2.6.orig/drivers/pci/hotplug/pciehp.h +++ linux-2.6/drivers/pci/hotplug/pciehp.h @@ -176,19 +176,7 @@ static inline void pciehp_firmware_init( { 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 #endif /* CONFIG_ACPI */ #endif /* _PCIEHP_H */ Index: linux-2.6/drivers/pci/hotplug/pciehp_core.c =================================================================== --- linux-2.6.orig/drivers/pci/hotplug/pciehp_core.c +++ linux-2.6/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_devi 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); Index: linux-2.6/drivers/pci/hotplug/pciehp_acpi.c =================================================================== --- linux-2.6.orig/drivers/pci/hotplug/pciehp_acpi.c +++ linux-2.6/drivers/pci/hotplug/pciehp_acpi.c @@ -85,9 +85,7 @@ static int __init dummy_probe(struct pci 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; Index: linux-2.6/Documentation/kernel-parameters.txt =================================================================== --- linux-2.6.orig/Documentation/kernel-parameters.txt +++ linux-2.6/Documentation/kernel-parameters.txt @@ -2048,18 +2048,17 @@ and is between 256 and 4096 characters. 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