Revert "PCI: PCIE ASPM support"

This reverts commit 6c723d5b.

It caused build errors on non-x86 platforms, config file confusion, and
even some boot errors on some x86-64 boxes.  All around, not quite ready
for prime-time :(

Cc: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/pci/pci-sysfs.c

@@ -21,7 +21,6 @@
 #include <linux/topology.h>
 #include <linux/mm.h>
 #include <linux/capability.h>
-#include <linux/aspm.h>
 #include "pci.h"
 
 static int sysfs_initialized;	/* = 0 */
@@ -651,8 +650,6 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
 	if (pcibios_add_platform_entries(pdev))
 		goto err_rom_file;
 
-	pcie_aspm_create_sysfs_dev_files(pdev);
-
 	return 0;
 
 err_rom_file:
@@ -682,8 +679,6 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
 	if (!sysfs_initialized)
 		return;
 
-	pcie_aspm_remove_sysfs_dev_files(pdev);
-
 	if (pdev->cfg_size < 4096)
 		sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
 	else

drivers/pci/pci.c

@@ -18,7 +18,6 @@
 #include <linux/spinlock.h>
 #include <linux/string.h>
 #include <linux/log2.h>
-#include <linux/aspm.h>
 #include <asm/dma.h>	/* isa_dma_bridge_buggy */
 #include "pci.h"
 
@@ -520,9 +519,6 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 	if (need_restore)
 		pci_restore_bars(dev);
 
-	if (dev->bus->self)
-		pcie_aspm_pm_state_change(dev->bus->self);
-
 	return 0;
 }
 

drivers/pci/pcie/Kconfig

@@ -26,23 +26,3 @@ config HOTPLUG_PCI_PCIE
 	  When in doubt, say N.
 
 source "drivers/pci/pcie/aer/Kconfig"
-
-#
-# PCI Express ASPM
-#
-config PCIEASPM
-	bool "PCI Express ASPM support(Experimental)"
-	depends on PCI && EXPERIMENTAL
-	default y
-	help
-	  This enables PCI Express ASPM (Active State Power Management) and
-	  Clock Power Management. ASPM supports state L0/L0s/L1.
-
-	  When in doubt, say N.
-config PCIEASPM_DEBUG
-	bool "Debug PCI Express ASPM"
-	depends on PCIEASPM
-	default n
-	help
-	  This enables PCI Express ASPM debug support. It will add per-device
-	  interface to control ASPM.

drivers/pci/pcie/Makefile

@@ -2,9 +2,6 @@
 # Makefile for PCI-Express PORT Driver
 #
 
-# Build PCI Express ASPM if needed
-obj-$(CONFIG_PCIEASPM)		+= aspm.o
-
 pcieportdrv-y			:= portdrv_core.o portdrv_pci.o portdrv_bus.o
 
 obj-$(CONFIG_PCIEPORTBUS)	+= pcieportdrv.o

drivers/pci/probe.c

@@ -9,7 +9,6 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/cpumask.h>
-#include <linux/aspm.h>
 #include "pci.h"
 
 #define CARDBUS_LATENCY_TIMER	176	/* secondary latency timer */
@@ -1002,10 +1001,6 @@ int pci_scan_slot(struct pci_bus *bus, int devfn)
 				break;
 		}
 	}
-
-	if (bus->self)
-		pcie_aspm_init_link_state(bus->self);
-
 	return nr;
 }
 

drivers/pci/remove.c

 #include <linux/pci.h>
 #include <linux/module.h>
-#include <linux/aspm.h>
 #include "pci.h"
 
 static void pci_free_resources(struct pci_dev *dev)
@@ -31,9 +30,6 @@ static void pci_stop_dev(struct pci_dev *dev)
 		dev->global_list.next = dev->global_list.prev = NULL;
 		up_write(&pci_bus_sem);
 	}
-
-	if (dev->bus->self)
-		pcie_aspm_exit_link_state(dev);
 }
 
 static void pci_destroy_dev(struct pci_dev *dev)

include/linux/aspm.h

-/*
- *	aspm.h
- *
- *	PCI Express ASPM defines and function prototypes
- *
- *	Copyright (C) 2007 Intel Corp.
- *		Zhang Yanmin (yanmin.zhang@intel.com)
- *		Shaohua Li (shaohua.li@intel.com)
- *
- *	For more information, please consult the following manuals (look at
- *	http://www.pcisig.com/ for how to get them):
- *
- *	PCI Express Specification
- */
-
-#ifndef LINUX_ASPM_H
-#define LINUX_ASPM_H
-
-#include <linux/pci.h>
-
-#define PCIE_LINK_STATE_L0S	1
-#define PCIE_LINK_STATE_L1	2
-#define PCIE_LINK_STATE_CLKPM	4
-
-#ifdef CONFIG_PCIEASPM
-extern void pcie_aspm_init_link_state(struct pci_dev *pdev);
-extern void pcie_aspm_exit_link_state(struct pci_dev *pdev);
-extern void pcie_aspm_pm_state_change(struct pci_dev *pdev);
-extern void pci_disable_link_state(struct pci_dev *pdev, int state);
-#else
-#define pcie_aspm_init_link_state(pdev)		do {} while (0)
-#define pcie_aspm_exit_link_state(pdev)		do {} while (0)
-#define pcie_aspm_pm_state_change(pdev)		do {} while (0)
-#define pci_disable_link_state(pdev, state)	do {} while (0)
-#endif
-
-#ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
-extern void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
-extern void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
-#else
-#define pcie_aspm_create_sysfs_dev_files(pdev)	do {} while (0)
-#define pcie_aspm_remove_sysfs_dev_files(pdev)	do {} while (0)
-#endif
-#endif /* LINUX_ASPM_H */

include/linux/pci.h

@@ -128,7 +128,6 @@ struct pci_cap_saved_state {
 	u32 data[0];
 };
 
-struct pcie_link_state;
 /*
  * The pci_dev structure is used to describe PCI devices.
  */
@@ -164,10 +163,6 @@ struct pci_dev {
 					   this is D0-D3, D0 being fully functional,
 					   and D3 being off. */
 
-#ifdef CONFIG_PCIEASPM
-	struct pcie_link_state	*link_state;	/* ASPM link state. */
-#endif
-
 	pci_channel_state_t error_state;	/* current connectivity state */
 	struct	device	dev;		/* Generic device interface */
 

include/linux/pci_regs.h

@@ -395,17 +395,9 @@
 #define  PCI_EXP_DEVSTA_AUXPD	0x10	/* AUX Power Detected */
 #define  PCI_EXP_DEVSTA_TRPND	0x20	/* Transactions Pending */
 #define PCI_EXP_LNKCAP		12	/* Link Capabilities */
-#define  PCI_EXP_LNKCAP_ASPMS	0xc00	/* ASPM Support */
-#define  PCI_EXP_LNKCAP_L0SEL	0x7000	/* L0s Exit Latency */
-#define  PCI_EXP_LNKCAP_L1EL	0x38000	/* L1 Exit Latency */
-#define  PCI_EXP_LNKCAP_CLKPM	0x40000	/* L1 Clock Power Management */
 #define PCI_EXP_LNKCTL		16	/* Link Control */
-#define  PCI_EXP_LNKCTL_RL	0x20	/* Retrain Link */
-#define  PCI_EXP_LNKCTL_CCC	0x40	/* Common Clock COnfiguration */
 #define  PCI_EXP_LNKCTL_CLKREQ_EN 0x100	/* Enable clkreq */
 #define PCI_EXP_LNKSTA		18	/* Link Status */
-#define  PCI_EXP_LNKSTA_LT	0x800	/* Link Training */
-#define  PCI_EXP_LNKSTA_SLC	0x1000	/* Slot Clock Configuration */
 #define PCI_EXP_SLTCAP		20	/* Slot Capabilities */
 #define PCI_EXP_SLTCTL		24	/* Slot Control */
 #define PCI_EXP_SLTSTA		26	/* Slot Status */