From 77bd741561016134d1761d6101c4f0361025062f Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:52:49 -0600 Subject: [PATCH] powerpc: PCI Error Recovery: PPC64 core recovery routines Various PCI bus errors can be signaled by newer PCI controllers. The core error recovery routines are architecture dependent. This patch adds a recovery infrastructure for the PPC64 pSeries systems. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from e8ca11b460c4c9c7fa6b529be221529ebd770e38 commit) --- arch/powerpc/platforms/pseries/Makefile | 2 +- arch/powerpc/platforms/pseries/eeh.c | 17 +- arch/powerpc/platforms/pseries/eeh_driver.c | 366 ++++++++++++++++++++++++++++ arch/powerpc/platforms/pseries/eeh_event.c | 39 +-- include/asm-powerpc/eeh.h | 8 +- include/asm-powerpc/eeh_event.h | 7 +- include/asm-powerpc/ppc-pci.h | 9 + 7 files changed, 413 insertions(+), 35 deletions(-) create mode 100644 arch/powerpc/platforms/pseries/eeh_driver.c diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 6accdd15550..0b7d5cb6417 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -4,7 +4,7 @@ obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_IBMVIO) += vio.o obj-$(CONFIG_XICS) += xics.o obj-$(CONFIG_SCANLOG) += scanlog.o -obj-$(CONFIG_EEH) += eeh.o eeh_event.o +obj-$(CONFIG_EEH) += eeh.o eeh_driver.o eeh_event.o obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o obj-$(CONFIG_HVCS) += hvcserver.o diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 7fbfd16d72b..d6560c45637 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -485,6 +485,11 @@ static void __eeh_mark_slot (struct device_node *dn, int mode_flag) if (PCI_DN(dn)) { PCI_DN(dn)->eeh_mode |= mode_flag; + /* Mark the pci device driver too */ + struct pci_dev *dev = PCI_DN(dn)->pcidev; + if (dev && dev->driver) + dev->error_state = pci_channel_io_frozen; + if (dn->child) __eeh_mark_slot (dn->child, mode_flag); } @@ -544,6 +549,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) int rets[3]; unsigned long flags; struct pci_dn *pdn; + enum pci_channel_state state; int rc = 0; __get_cpu_var(total_mmio_ffs)++; @@ -648,8 +654,13 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) eeh_mark_slot (dn, EEH_MODE_ISOLATED); spin_unlock_irqrestore(&confirm_error_lock, flags); - eeh_send_failure_event (dn, dev, rets[0], rets[2]); - + state = pci_channel_io_normal; + if ((rets[0] == 2) || (rets[0] == 4)) + state = pci_channel_io_frozen; + if (rets[0] == 5) + state = pci_channel_io_perm_failure; + eeh_send_failure_event (dn, dev, state, rets[2]); + /* Most EEH events are due to device driver bugs. Having * a stack trace will help the device-driver authors figure * out what happened. So print that out. */ @@ -953,8 +964,10 @@ static void *early_enable_eeh(struct device_node *dn, void *data) * But there are a few cases like display devices that make sense. */ enable = 1; /* i.e. we will do checking */ +#if 0 if ((*class_code >> 16) == PCI_BASE_CLASS_DISPLAY) enable = 0; +#endif if (!enable) pdn->eeh_mode |= EEH_MODE_NOCHECK; diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c new file mode 100644 index 00000000000..f6cff065d89 --- /dev/null +++ b/arch/powerpc/platforms/pseries/eeh_driver.c @@ -0,0 +1,366 @@ +/* + * PCI Error Recovery Driver for RPA-compliant PPC64 platform. + * Copyright (C) 2004, 2005 Linas Vepstas + * + * 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. + * + * Send feedback to + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + +static inline const char * pcid_name (struct pci_dev *pdev) +{ + if (pdev->dev.driver) + return pdev->dev.driver->name; + return ""; +} + +/** + * Return the "partitionable endpoint" (pe) under which this device lies + */ +static struct device_node * find_device_pe(struct device_node *dn) +{ + while ((dn->parent) && PCI_DN(dn->parent) && + (PCI_DN(dn->parent)->eeh_mode & EEH_MODE_SUPPORTED)) { + dn = dn->parent; + } + return dn; +} + + +#ifdef DEBUG +static void print_device_node_tree (struct pci_dn *pdn, int dent) +{ + int i; + if (!pdn) return; + for (i=0;inode->name, pdn->eeh_mode, pdn->eeh_config_addr, + pdn->eeh_pe_config_addr, pdn->node->full_name); + dent += 3; + struct device_node *pc = pdn->node->child; + while (pc) { + print_device_node_tree(PCI_DN(pc), dent); + pc = pc->sibling; + } +} +#endif + +/** + * irq_in_use - return true if this irq is being used + */ +static int irq_in_use(unsigned int irq) +{ + int rc = 0; + unsigned long flags; + struct irq_desc *desc = irq_desc + irq; + + spin_lock_irqsave(&desc->lock, flags); + if (desc->action) + rc = 1; + spin_unlock_irqrestore(&desc->lock, flags); + return rc; +} + +/* ------------------------------------------------------- */ +/** eeh_report_error - report an EEH error to each device, + * collect up and merge the device responses. + */ + +static void eeh_report_error(struct pci_dev *dev, void *userdata) +{ + enum pcierr_result rc, *res = userdata; + struct pci_driver *driver = dev->driver; + + dev->error_state = pci_channel_io_frozen; + + if (!driver) + return; + + if (irq_in_use (dev->irq)) { + struct device_node *dn = pci_device_to_OF_node(dev); + PCI_DN(dn)->eeh_mode |= EEH_MODE_IRQ_DISABLED; + disable_irq_nosync(dev->irq); + } + if (!driver->err_handler) + return; + if (!driver->err_handler->error_detected) + return; + + rc = driver->err_handler->error_detected (dev, pci_channel_io_frozen); + if (*res == PCIERR_RESULT_NONE) *res = rc; + if (*res == PCIERR_RESULT_NEED_RESET) return; + if (*res == PCIERR_RESULT_DISCONNECT && + rc == PCIERR_RESULT_NEED_RESET) *res = rc; +} + +/** eeh_report_reset -- tell this device that the pci slot + * has been reset. + */ + +static void eeh_report_reset(struct pci_dev *dev, void *userdata) +{ + struct pci_driver *driver = dev->driver; + struct device_node *dn = pci_device_to_OF_node(dev); + + if (!driver) + return; + + if ((PCI_DN(dn)->eeh_mode) & EEH_MODE_IRQ_DISABLED) { + PCI_DN(dn)->eeh_mode &= ~EEH_MODE_IRQ_DISABLED; + enable_irq(dev->irq); + } + if (!driver->err_handler) + return; + if (!driver->err_handler->slot_reset) + return; + + driver->err_handler->slot_reset(dev); +} + +static void eeh_report_resume(struct pci_dev *dev, void *userdata) +{ + struct pci_driver *driver = dev->driver; + + dev->error_state = pci_channel_io_normal; + + if (!driver) + return; + if (!driver->err_handler) + return; + if (!driver->err_handler->resume) + return; + + driver->err_handler->resume(dev); +} + +static void eeh_report_failure(struct pci_dev *dev, void *userdata) +{ + struct pci_driver *driver = dev->driver; + + dev->error_state = pci_channel_io_perm_failure; + + if (!driver) + return; + + if (irq_in_use (dev->irq)) { + struct device_node *dn = pci_device_to_OF_node(dev); + PCI_DN(dn)->eeh_mode |= EEH_MODE_IRQ_DISABLED; + disable_irq_nosync(dev->irq); + } + if (!driver->err_handler) + return; + if (!driver->err_handler->error_detected) + return; + driver->err_handler->error_detected(dev, pci_channel_io_perm_failure); +} + +/* ------------------------------------------------------- */ +/** + * handle_eeh_events -- reset a PCI device after hard lockup. + * + * pSeries systems will isolate a PCI slot if the PCI-Host + * bridge detects address or data parity errors, DMA's + * occuring to wild addresses (which usually happen due to + * bugs in device drivers or in PCI adapter firmware). + * Slot isolations also occur if #SERR, #PERR or other misc + * PCI-related errors are detected. + * + * Recovery process consists of unplugging the device driver + * (which generated hotplug events to userspace), then issuing + * a PCI #RST to the device, then reconfiguring the PCI config + * space for all bridges & devices under this slot, and then + * finally restarting the device drivers (which cause a second + * set of hotplug events to go out to userspace). + */ + +/** + * eeh_reset_device() -- perform actual reset of a pci slot + * Args: bus: pointer to the pci bus structure corresponding + * to the isolated slot. A non-null value will + * cause all devices under the bus to be removed + * and then re-added. + * pe_dn: pointer to a "Partionable Endpoint" device node. + * This is the top-level structure on which pci + * bus resets can be performed. + */ + +static void eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus) +{ + if (bus) + pcibios_remove_pci_devices(bus); + + /* Reset the pci controller. (Asserts RST#; resets config space). + * Reconfigure bridges and devices */ + rtas_set_slot_reset(pe_dn); + + /* Walk over all functions on this device */ + rtas_configure_bridge(pe_dn); + eeh_restore_bars(pe_dn); + + /* Give the system 5 seconds to finish running the user-space + * hotplug shutdown scripts, e.g. ifdown for ethernet. Yes, + * this is a hack, but if we don't do this, and try to bring + * the device up before the scripts have taken it down, + * potentially weird things happen. + */ + if (bus) { + ssleep (5); + pcibios_add_pci_devices(bus); + } +} + +/* The longest amount of time to wait for a pci device + * to come back on line, in seconds. + */ +#define MAX_WAIT_FOR_RECOVERY 15 + +void handle_eeh_events (struct eeh_event *event) +{ + struct device_node *frozen_dn; + struct pci_dn *frozen_pdn; + struct pci_bus *frozen_bus; + int perm_failure = 0; + + frozen_dn = find_device_pe(event->dn); + frozen_bus = pcibios_find_pci_bus(frozen_dn); + + if (!frozen_dn) { + printk(KERN_ERR "EEH: Error: Cannot find partition endpoint for %s\n", + pci_name(event->dev)); + return; + } + + /* There are two different styles for coming up with the PE. + * In the old style, it was the highest EEH-capable device + * which was always an EADS pci bridge. In the new style, + * there might not be any EADS bridges, and even when there are, + * the firmware marks them as "EEH incapable". So another + * two-step is needed to find the pci bus.. */ + if (!frozen_bus) + frozen_bus = pcibios_find_pci_bus (frozen_dn->parent); + + if (!frozen_bus) { + printk(KERN_ERR "EEH: Cannot find PCI bus for %s\n", + frozen_dn->full_name); + return; + } + +#if 0 + /* We may get "permanent failure" messages on empty slots. + * These are false alarms. Empty slots have no child dn. */ + if ((event->state == pci_channel_io_perm_failure) && (frozen_device == NULL)) + return; +#endif + + frozen_pdn = PCI_DN(frozen_dn); + frozen_pdn->eeh_freeze_count++; + + if (frozen_pdn->eeh_freeze_count > EEH_MAX_ALLOWED_FREEZES) + perm_failure = 1; + + /* If the reset state is a '5' and the time to reset is 0 (infinity) + * or is more then 15 seconds, then mark this as a permanent failure. + */ + if ((event->state == pci_channel_io_perm_failure) && + ((event->time_unavail <= 0) || + (event->time_unavail > MAX_WAIT_FOR_RECOVERY*1000))) + { + perm_failure = 1; + } + + /* Log the error with the rtas logger. */ + if (perm_failure) { + /* + * About 90% of all real-life EEH failures in the field + * are due to poorly seated PCI cards. Only 10% or so are + * due to actual, failed cards. + */ + printk(KERN_ERR + "EEH: PCI device %s - %s has failed %d times \n" + "and has been permanently disabled. Please try reseating\n" + "this device or replacing it.\n", + pci_name (frozen_pdn->pcidev), + pcid_name(frozen_pdn->pcidev), + frozen_pdn->eeh_freeze_count); + + eeh_slot_error_detail(frozen_pdn, 2 /* Permanent Error */); + + /* Notify all devices that they're about to go down. */ + pci_walk_bus(frozen_bus, eeh_report_failure, 0); + + /* Shut down the device drivers for good. */ + pcibios_remove_pci_devices(frozen_bus); + return; + } + + eeh_slot_error_detail(frozen_pdn, 1 /* Temporary Error */); + printk(KERN_WARNING + "EEH: This PCI device has failed %d times since last reboot: %s - %s\n", + frozen_pdn->eeh_freeze_count, + pci_name (frozen_pdn->pcidev), + pcid_name(frozen_pdn->pcidev)); + + /* Walk the various device drivers attached to this slot through + * a reset sequence, giving each an opportunity to do what it needs + * to accomplish the reset. Each child gets a report of the + * status ... if any child can't handle the reset, then the entire + * slot is dlpar removed and added. + */ + enum pcierr_result result = PCIERR_RESULT_NONE; + pci_walk_bus(frozen_bus, eeh_report_error, &result); + + /* If all device drivers were EEH-unaware, then shut + * down all of the device drivers, and hope they + * go down willingly, without panicing the system. + */ + if (result == PCIERR_RESULT_NONE) { + eeh_reset_device(frozen_pdn, frozen_bus); + } + + /* If any device called out for a reset, then reset the slot */ + if (result == PCIERR_RESULT_NEED_RESET) { + eeh_reset_device(frozen_pdn, NULL); + pci_walk_bus(frozen_bus, eeh_report_reset, 0); + } + + /* If all devices reported they can proceed, the re-enable PIO */ + if (result == PCIERR_RESULT_CAN_RECOVER) { + /* XXX Not supported; we brute-force reset the device */ + eeh_reset_device(frozen_pdn, NULL); + pci_walk_bus(frozen_bus, eeh_report_reset, 0); + } + + /* Tell all device drivers that they can resume operations */ + pci_walk_bus(frozen_bus, eeh_report_resume, 0); +} + +/* ---------- end of file ---------- */ diff --git a/arch/powerpc/platforms/pseries/eeh_event.c b/arch/powerpc/platforms/pseries/eeh_event.c index 92497333c2b..9a9961f2748 100644 --- a/arch/powerpc/platforms/pseries/eeh_event.c +++ b/arch/powerpc/platforms/pseries/eeh_event.c @@ -21,6 +21,7 @@ #include #include #include +#include /** Overview: * EEH error states may be detected within exception handlers; @@ -36,31 +37,6 @@ LIST_HEAD(eeh_eventlist); static void eeh_thread_launcher(void *); DECLARE_WORK(eeh_event_wq, eeh_thread_launcher, NULL); -/** - * eeh_panic - call panic() for an eeh event that cannot be handled. - * The philosophy of this routine is that it is better to panic and - * halt the OS than it is to risk possible data corruption by - * oblivious device drivers that don't know better. - * - * @dev pci device that had an eeh event - * @reset_state current reset state of the device slot - */ -static void eeh_panic(struct pci_dev *dev, int reset_state) -{ - /* - * Since the panic_on_oops sysctl is used to halt the system - * in light of potential corruption, we can use it here. - */ - if (panic_on_oops) { - panic("EEH: MMIO failure (%d) on device:%s\n", reset_state, - pci_name(dev)); - } - else { - printk(KERN_INFO "EEH: Ignored MMIO failure (%d) on device:%s\n", - reset_state, pci_name(dev)); - } -} - /** * eeh_event_handler - dispatch EEH events. The detection of a frozen * slot can occur inside an interrupt, where it can be hard to do @@ -82,10 +58,16 @@ static int eeh_event_handler(void * dummy) spin_lock_irqsave(&eeh_eventlist_lock, flags); event = NULL; + + /* Unqueue the event, get ready to process. */ if (!list_empty(&eeh_eventlist)) { event = list_entry(eeh_eventlist.next, struct eeh_event, list); list_del(&event->list); } + + if (event) + eeh_mark_slot(event->dn, EEH_MODE_RECOVERING); + spin_unlock_irqrestore(&eeh_eventlist_lock, flags); if (event == NULL) break; @@ -93,8 +75,11 @@ static int eeh_event_handler(void * dummy) printk(KERN_INFO "EEH: Detected PCI bus error on device %s\n", pci_name(event->dev)); - eeh_panic (event->dev, event->state); + handle_eeh_events(event); + + eeh_clear_slot(event->dn, EEH_MODE_RECOVERING); + pci_dev_put(event->dev); kfree(event); } @@ -122,7 +107,7 @@ static void eeh_thread_launcher(void *dummy) */ int eeh_send_failure_event (struct device_node *dn, struct pci_dev *dev, - int state, + enum pci_channel_state state, int time_unavail) { unsigned long flags; diff --git a/include/asm-powerpc/eeh.h b/include/asm-powerpc/eeh.h index 4395b7bc1ed..b263fb2fa6e 100644 --- a/include/asm-powerpc/eeh.h +++ b/include/asm-powerpc/eeh.h @@ -34,9 +34,11 @@ struct device_node; extern int eeh_subsystem_enabled; /* Values for eeh_mode bits in device_node */ -#define EEH_MODE_SUPPORTED (1<<0) -#define EEH_MODE_NOCHECK (1<<1) -#define EEH_MODE_ISOLATED (1<<2) +#define EEH_MODE_SUPPORTED (1<<0) +#define EEH_MODE_NOCHECK (1<<1) +#define EEH_MODE_ISOLATED (1<<2) +#define EEH_MODE_RECOVERING (1<<3) +#define EEH_MODE_IRQ_DISABLED (1<<4) /* Max number of EEH freezes allowed before we consider the device * to be permanently disabled. */ diff --git a/include/asm-powerpc/eeh_event.h b/include/asm-powerpc/eeh_event.h index 5e11a00b6fa..93d55a2bebf 100644 --- a/include/asm-powerpc/eeh_event.h +++ b/include/asm-powerpc/eeh_event.h @@ -30,7 +30,7 @@ struct eeh_event { struct list_head list; struct device_node *dn; /* struct device node */ struct pci_dev *dev; /* affected device */ - int state; + enum pci_channel_state state; /* PCI bus state for the affected device */ int time_unavail; /* milliseconds until device might be available */ }; @@ -47,8 +47,11 @@ struct eeh_event { */ int eeh_send_failure_event (struct device_node *dn, struct pci_dev *dev, - int reset_state, + enum pci_channel_state state, int time_unavail); +/* Main recovery function */ +void handle_eeh_events (struct eeh_event *); + #endif /* __KERNEL__ */ #endif /* ASM_PPC64_EEH_EVENT_H */ diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h index bdef312900a..caf67a3bcb7 100644 --- a/include/asm-powerpc/ppc-pci.h +++ b/include/asm-powerpc/ppc-pci.h @@ -52,6 +52,15 @@ extern unsigned long pci_probe_only; /* ---- EEH internal-use-only related routines ---- */ #ifdef CONFIG_EEH +/** + * eeh_slot_error_detail -- record and EEH error condition to the log + * @severity: 1 if temporary, 2 if permanent failure. + * + * Obtains the the EEH error details from the RTAS subsystem, + * and then logs these details with the RTAS error log system. + */ +void eeh_slot_error_detail (struct pci_dn *pdn, int severity); + /** * rtas_set_slot_reset -- unfreeze a frozen slot * -- cgit v1.2.3-70-g09d2 From 5d5a0936b3ad9e3d3f6eaf61f1a06c62ea0e7a59 Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:53:07 -0600 Subject: [PATCH] powerpc: Split out PCI address cache to its own file 25-pci-address-cache.patch The core EEH file is rather large. This patch splits out a self-contained chunk of it into its own file. This is the chunk that performes the caching and lookup of pci devices based on the i/o addresses of thier resoures. This code is almos architecture-independent and could be used by any system that wanted to find a pci device based only on the i/o address used by the device. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from b0b291d59906d4a9a89ed9e34d9fd684c7188924 commit) --- arch/powerpc/platforms/pseries/Makefile | 2 +- arch/powerpc/platforms/pseries/eeh.c | 295 +-------------------------- arch/powerpc/platforms/pseries/eeh_cache.c | 317 +++++++++++++++++++++++++++++ include/asm-powerpc/ppc-pci.h | 8 + 4 files changed, 328 insertions(+), 294 deletions(-) create mode 100644 arch/powerpc/platforms/pseries/eeh_cache.c diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 0b7d5cb6417..61616d14407 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -4,7 +4,7 @@ obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_IBMVIO) += vio.o obj-$(CONFIG_XICS) += xics.o obj-$(CONFIG_SCANLOG) += scanlog.o -obj-$(CONFIG_EEH) += eeh.o eeh_driver.o eeh_event.o +obj-$(CONFIG_EEH) += eeh.o eeh_cache.o eeh_driver.o eeh_event.o obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o obj-$(CONFIG_HVCS) += hvcserver.o diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index d6560c45637..57bef2c2f32 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -76,9 +76,6 @@ */ #define EEH_MAX_FAILS 100000 -/* Misc forward declaraions */ -static void eeh_save_bars(struct pci_dev * pdev, struct pci_dn *pdn); - /* RTAS tokens */ static int ibm_set_eeh_option; static int ibm_set_slot_reset; @@ -107,296 +104,8 @@ static DEFINE_PER_CPU(unsigned long, false_positives); static DEFINE_PER_CPU(unsigned long, ignored_failures); static DEFINE_PER_CPU(unsigned long, slot_resets); -/** - * The pci address cache subsystem. This subsystem places - * PCI device address resources into a red-black tree, sorted - * according to the address range, so that given only an i/o - * address, the corresponding PCI device can be **quickly** - * found. It is safe to perform an address lookup in an interrupt - * context; this ability is an important feature. - * - * Currently, the only customer of this code is the EEH subsystem; - * thus, this code has been somewhat tailored to suit EEH better. - * In particular, the cache does *not* hold the addresses of devices - * for which EEH is not enabled. - * - * (Implementation Note: The RB tree seems to be better/faster - * than any hash algo I could think of for this problem, even - * with the penalty of slow pointer chases for d-cache misses). - */ -struct pci_io_addr_range -{ - struct rb_node rb_node; - unsigned long addr_lo; - unsigned long addr_hi; - struct pci_dev *pcidev; - unsigned int flags; -}; - -static struct pci_io_addr_cache -{ - struct rb_root rb_root; - spinlock_t piar_lock; -} pci_io_addr_cache_root; - -static inline struct pci_dev *__pci_get_device_by_addr(unsigned long addr) -{ - struct rb_node *n = pci_io_addr_cache_root.rb_root.rb_node; - - while (n) { - struct pci_io_addr_range *piar; - piar = rb_entry(n, struct pci_io_addr_range, rb_node); - - if (addr < piar->addr_lo) { - n = n->rb_left; - } else { - if (addr > piar->addr_hi) { - n = n->rb_right; - } else { - pci_dev_get(piar->pcidev); - return piar->pcidev; - } - } - } - - return NULL; -} - -/** - * pci_get_device_by_addr - Get device, given only address - * @addr: mmio (PIO) phys address or i/o port number - * - * Given an mmio phys address, or a port number, find a pci device - * that implements this address. Be sure to pci_dev_put the device - * when finished. I/O port numbers are assumed to be offset - * from zero (that is, they do *not* have pci_io_addr added in). - * It is safe to call this function within an interrupt. - */ -static struct pci_dev *pci_get_device_by_addr(unsigned long addr) -{ - struct pci_dev *dev; - unsigned long flags; - - spin_lock_irqsave(&pci_io_addr_cache_root.piar_lock, flags); - dev = __pci_get_device_by_addr(addr); - spin_unlock_irqrestore(&pci_io_addr_cache_root.piar_lock, flags); - return dev; -} - -#ifdef DEBUG -/* - * Handy-dandy debug print routine, does nothing more - * than print out the contents of our addr cache. - */ -static void pci_addr_cache_print(struct pci_io_addr_cache *cache) -{ - struct rb_node *n; - int cnt = 0; - - n = rb_first(&cache->rb_root); - while (n) { - struct pci_io_addr_range *piar; - piar = rb_entry(n, struct pci_io_addr_range, rb_node); - printk(KERN_DEBUG "PCI: %s addr range %d [%lx-%lx]: %s\n", - (piar->flags & IORESOURCE_IO) ? "i/o" : "mem", cnt, - piar->addr_lo, piar->addr_hi, pci_name(piar->pcidev)); - cnt++; - n = rb_next(n); - } -} -#endif - -/* Insert address range into the rb tree. */ -static struct pci_io_addr_range * -pci_addr_cache_insert(struct pci_dev *dev, unsigned long alo, - unsigned long ahi, unsigned int flags) -{ - struct rb_node **p = &pci_io_addr_cache_root.rb_root.rb_node; - struct rb_node *parent = NULL; - struct pci_io_addr_range *piar; - - /* Walk tree, find a place to insert into tree */ - while (*p) { - parent = *p; - piar = rb_entry(parent, struct pci_io_addr_range, rb_node); - if (ahi < piar->addr_lo) { - p = &parent->rb_left; - } else if (alo > piar->addr_hi) { - p = &parent->rb_right; - } else { - if (dev != piar->pcidev || - alo != piar->addr_lo || ahi != piar->addr_hi) { - printk(KERN_WARNING "PIAR: overlapping address range\n"); - } - return piar; - } - } - piar = (struct pci_io_addr_range *)kmalloc(sizeof(struct pci_io_addr_range), GFP_ATOMIC); - if (!piar) - return NULL; - - piar->addr_lo = alo; - piar->addr_hi = ahi; - piar->pcidev = dev; - piar->flags = flags; - -#ifdef DEBUG - printk(KERN_DEBUG "PIAR: insert range=[%lx:%lx] dev=%s\n", - alo, ahi, pci_name (dev)); -#endif - - rb_link_node(&piar->rb_node, parent, p); - rb_insert_color(&piar->rb_node, &pci_io_addr_cache_root.rb_root); - - return piar; -} - -static void __pci_addr_cache_insert_device(struct pci_dev *dev) -{ - struct device_node *dn; - struct pci_dn *pdn; - int i; - int inserted = 0; - - dn = pci_device_to_OF_node(dev); - if (!dn) { - printk(KERN_WARNING "PCI: no pci dn found for dev=%s\n", pci_name(dev)); - return; - } - - /* Skip any devices for which EEH is not enabled. */ - pdn = PCI_DN(dn); - if (!(pdn->eeh_mode & EEH_MODE_SUPPORTED) || - pdn->eeh_mode & EEH_MODE_NOCHECK) { -#ifdef DEBUG - printk(KERN_INFO "PCI: skip building address cache for=%s - %s\n", - pci_name(dev), pdn->node->full_name); -#endif - return; - } - - /* The cache holds a reference to the device... */ - pci_dev_get(dev); - - /* Walk resources on this device, poke them into the tree */ - for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { - unsigned long start = pci_resource_start(dev,i); - unsigned long end = pci_resource_end(dev,i); - unsigned int flags = pci_resource_flags(dev,i); - - /* We are interested only bus addresses, not dma or other stuff */ - if (0 == (flags & (IORESOURCE_IO | IORESOURCE_MEM))) - continue; - if (start == 0 || ~start == 0 || end == 0 || ~end == 0) - continue; - pci_addr_cache_insert(dev, start, end, flags); - inserted = 1; - } - - /* If there was nothing to add, the cache has no reference... */ - if (!inserted) - pci_dev_put(dev); -} - -/** - * pci_addr_cache_insert_device - Add a device to the address cache - * @dev: PCI device whose I/O addresses we are interested in. - * - * In order to support the fast lookup of devices based on addresses, - * we maintain a cache of devices that can be quickly searched. - * This routine adds a device to that cache. - */ -static void pci_addr_cache_insert_device(struct pci_dev *dev) -{ - unsigned long flags; - - spin_lock_irqsave(&pci_io_addr_cache_root.piar_lock, flags); - __pci_addr_cache_insert_device(dev); - spin_unlock_irqrestore(&pci_io_addr_cache_root.piar_lock, flags); -} - -static inline void __pci_addr_cache_remove_device(struct pci_dev *dev) -{ - struct rb_node *n; - int removed = 0; - -restart: - n = rb_first(&pci_io_addr_cache_root.rb_root); - while (n) { - struct pci_io_addr_range *piar; - piar = rb_entry(n, struct pci_io_addr_range, rb_node); - - if (piar->pcidev == dev) { - rb_erase(n, &pci_io_addr_cache_root.rb_root); - removed = 1; - kfree(piar); - goto restart; - } - n = rb_next(n); - } - - /* The cache no longer holds its reference to this device... */ - if (removed) - pci_dev_put(dev); -} - -/** - * pci_addr_cache_remove_device - remove pci device from addr cache - * @dev: device to remove - * - * Remove a device from the addr-cache tree. - * This is potentially expensive, since it will walk - * the tree multiple times (once per resource). - * But so what; device removal doesn't need to be that fast. - */ -static void pci_addr_cache_remove_device(struct pci_dev *dev) -{ - unsigned long flags; - - spin_lock_irqsave(&pci_io_addr_cache_root.piar_lock, flags); - __pci_addr_cache_remove_device(dev); - spin_unlock_irqrestore(&pci_io_addr_cache_root.piar_lock, flags); -} - -/** - * pci_addr_cache_build - Build a cache of I/O addresses - * - * Build a cache of pci i/o addresses. This cache will be used to - * find the pci device that corresponds to a given address. - * This routine scans all pci busses to build the cache. - * Must be run late in boot process, after the pci controllers - * have been scaned for devices (after all device resources are known). - */ -void __init pci_addr_cache_build(void) -{ - struct device_node *dn; - struct pci_dev *dev = NULL; - - if (!eeh_subsystem_enabled) - return; - - spin_lock_init(&pci_io_addr_cache_root.piar_lock); - - while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { - /* Ignore PCI bridges ( XXX why ??) */ - if ((dev->class >> 16) == PCI_BASE_CLASS_BRIDGE) { - continue; - } - pci_addr_cache_insert_device(dev); - - /* Save the BAR's; firmware doesn't restore these after EEH reset */ - dn = pci_device_to_OF_node(dev); - eeh_save_bars(dev, PCI_DN(dn)); - } - -#ifdef DEBUG - /* Verify tree built up above, echo back the list of addrs. */ - pci_addr_cache_print(&pci_io_addr_cache_root); -#endif -} - /* --------------------------------------------------------------- */ -/* Above lies the PCI Address Cache. Below lies the EEH event infrastructure */ +/* Below lies the EEH event infrastructure */ void eeh_slot_error_detail (struct pci_dn *pdn, int severity) { @@ -880,7 +589,7 @@ void eeh_restore_bars(struct pci_dn *pdn) * PCI devices are added individuallly; but, for the restore, * an entire slot is reset at a time. */ -static void eeh_save_bars(struct pci_dev * pdev, struct pci_dn *pdn) +void eeh_save_bars(struct pci_dev * pdev, struct pci_dn *pdn) { int i; diff --git a/arch/powerpc/platforms/pseries/eeh_cache.c b/arch/powerpc/platforms/pseries/eeh_cache.c new file mode 100644 index 00000000000..9fe2a7de04c --- /dev/null +++ b/arch/powerpc/platforms/pseries/eeh_cache.c @@ -0,0 +1,317 @@ +/* + * eeh_cache.c + * PCI address cache; allows the lookup of PCI devices based on I/O address + * + * Copyright (C) 2004 Linas Vepstas IBM Corporation + * + * 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. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#undef DEBUG + +/** + * The pci address cache subsystem. This subsystem places + * PCI device address resources into a red-black tree, sorted + * according to the address range, so that given only an i/o + * address, the corresponding PCI device can be **quickly** + * found. It is safe to perform an address lookup in an interrupt + * context; this ability is an important feature. + * + * Currently, the only customer of this code is the EEH subsystem; + * thus, this code has been somewhat tailored to suit EEH better. + * In particular, the cache does *not* hold the addresses of devices + * for which EEH is not enabled. + * + * (Implementation Note: The RB tree seems to be better/faster + * than any hash algo I could think of for this problem, even + * with the penalty of slow pointer chases for d-cache misses). + */ +struct pci_io_addr_range +{ + struct rb_node rb_node; + unsigned long addr_lo; + unsigned long addr_hi; + struct pci_dev *pcidev; + unsigned int flags; +}; + +static struct pci_io_addr_cache +{ + struct rb_root rb_root; + spinlock_t piar_lock; +} pci_io_addr_cache_root; + +static inline struct pci_dev *__pci_get_device_by_addr(unsigned long addr) +{ + struct rb_node *n = pci_io_addr_cache_root.rb_root.rb_node; + + while (n) { + struct pci_io_addr_range *piar; + piar = rb_entry(n, struct pci_io_addr_range, rb_node); + + if (addr < piar->addr_lo) { + n = n->rb_left; + } else { + if (addr > piar->addr_hi) { + n = n->rb_right; + } else { + pci_dev_get(piar->pcidev); + return piar->pcidev; + } + } + } + + return NULL; +} + +/** + * pci_get_device_by_addr - Get device, given only address + * @addr: mmio (PIO) phys address or i/o port number + * + * Given an mmio phys address, or a port number, find a pci device + * that implements this address. Be sure to pci_dev_put the device + * when finished. I/O port numbers are assumed to be offset + * from zero (that is, they do *not* have pci_io_addr added in). + * It is safe to call this function within an interrupt. + */ +struct pci_dev *pci_get_device_by_addr(unsigned long addr) +{ + struct pci_dev *dev; + unsigned long flags; + + spin_lock_irqsave(&pci_io_addr_cache_root.piar_lock, flags); + dev = __pci_get_device_by_addr(addr); + spin_unlock_irqrestore(&pci_io_addr_cache_root.piar_lock, flags); + return dev; +} + +#ifdef DEBUG +/* + * Handy-dandy debug print routine, does nothing more + * than print out the contents of our addr cache. + */ +static void pci_addr_cache_print(struct pci_io_addr_cache *cache) +{ + struct rb_node *n; + int cnt = 0; + + n = rb_first(&cache->rb_root); + while (n) { + struct pci_io_addr_range *piar; + piar = rb_entry(n, struct pci_io_addr_range, rb_node); + printk(KERN_DEBUG "PCI: %s addr range %d [%lx-%lx]: %s\n", + (piar->flags & IORESOURCE_IO) ? "i/o" : "mem", cnt, + piar->addr_lo, piar->addr_hi, pci_name(piar->pcidev)); + cnt++; + n = rb_next(n); + } +} +#endif + +/* Insert address range into the rb tree. */ +static struct pci_io_addr_range * +pci_addr_cache_insert(struct pci_dev *dev, unsigned long alo, + unsigned long ahi, unsigned int flags) +{ + struct rb_node **p = &pci_io_addr_cache_root.rb_root.rb_node; + struct rb_node *parent = NULL; + struct pci_io_addr_range *piar; + + /* Walk tree, find a place to insert into tree */ + while (*p) { + parent = *p; + piar = rb_entry(parent, struct pci_io_addr_range, rb_node); + if (ahi < piar->addr_lo) { + p = &parent->rb_left; + } else if (alo > piar->addr_hi) { + p = &parent->rb_right; + } else { + if (dev != piar->pcidev || + alo != piar->addr_lo || ahi != piar->addr_hi) { + printk(KERN_WARNING "PIAR: overlapping address range\n"); + } + return piar; + } + } + piar = (struct pci_io_addr_range *)kmalloc(sizeof(struct pci_io_addr_range), GFP_ATOMIC); + if (!piar) + return NULL; + + piar->addr_lo = alo; + piar->addr_hi = ahi; + piar->pcidev = dev; + piar->flags = flags; + +#ifdef DEBUG + printk(KERN_DEBUG "PIAR: insert range=[%lx:%lx] dev=%s\n", + alo, ahi, pci_name (dev)); +#endif + + rb_link_node(&piar->rb_node, parent, p); + rb_insert_color(&piar->rb_node, &pci_io_addr_cache_root.rb_root); + + return piar; +} + +static void __pci_addr_cache_insert_device(struct pci_dev *dev) +{ + struct device_node *dn; + struct pci_dn *pdn; + int i; + int inserted = 0; + + dn = pci_device_to_OF_node(dev); + if (!dn) { + printk(KERN_WARNING "PCI: no pci dn found for dev=%s\n", pci_name(dev)); + return; + } + + /* Skip any devices for which EEH is not enabled. */ + pdn = PCI_DN(dn); + if (!(pdn->eeh_mode & EEH_MODE_SUPPORTED) || + pdn->eeh_mode & EEH_MODE_NOCHECK) { +#ifdef DEBUG + printk(KERN_INFO "PCI: skip building address cache for=%s - %s\n", + pci_name(dev), pdn->node->full_name); +#endif + return; + } + + /* The cache holds a reference to the device... */ + pci_dev_get(dev); + + /* Walk resources on this device, poke them into the tree */ + for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { + unsigned long start = pci_resource_start(dev,i); + unsigned long end = pci_resource_end(dev,i); + unsigned int flags = pci_resource_flags(dev,i); + + /* We are interested only bus addresses, not dma or other stuff */ + if (0 == (flags & (IORESOURCE_IO | IORESOURCE_MEM))) + continue; + if (start == 0 || ~start == 0 || end == 0 || ~end == 0) + continue; + pci_addr_cache_insert(dev, start, end, flags); + inserted = 1; + } + + /* If there was nothing to add, the cache has no reference... */ + if (!inserted) + pci_dev_put(dev); +} + +/** + * pci_addr_cache_insert_device - Add a device to the address cache + * @dev: PCI device whose I/O addresses we are interested in. + * + * In order to support the fast lookup of devices based on addresses, + * we maintain a cache of devices that can be quickly searched. + * This routine adds a device to that cache. + */ +void pci_addr_cache_insert_device(struct pci_dev *dev) +{ + unsigned long flags; + + spin_lock_irqsave(&pci_io_addr_cache_root.piar_lock, flags); + __pci_addr_cache_insert_device(dev); + spin_unlock_irqrestore(&pci_io_addr_cache_root.piar_lock, flags); +} + +static inline void __pci_addr_cache_remove_device(struct pci_dev *dev) +{ + struct rb_node *n; + int removed = 0; + +restart: + n = rb_first(&pci_io_addr_cache_root.rb_root); + while (n) { + struct pci_io_addr_range *piar; + piar = rb_entry(n, struct pci_io_addr_range, rb_node); + + if (piar->pcidev == dev) { + rb_erase(n, &pci_io_addr_cache_root.rb_root); + removed = 1; + kfree(piar); + goto restart; + } + n = rb_next(n); + } + + /* The cache no longer holds its reference to this device... */ + if (removed) + pci_dev_put(dev); +} + +/** + * pci_addr_cache_remove_device - remove pci device from addr cache + * @dev: device to remove + * + * Remove a device from the addr-cache tree. + * This is potentially expensive, since it will walk + * the tree multiple times (once per resource). + * But so what; device removal doesn't need to be that fast. + */ +void pci_addr_cache_remove_device(struct pci_dev *dev) +{ + unsigned long flags; + + spin_lock_irqsave(&pci_io_addr_cache_root.piar_lock, flags); + __pci_addr_cache_remove_device(dev); + spin_unlock_irqrestore(&pci_io_addr_cache_root.piar_lock, flags); +} + +/** + * pci_addr_cache_build - Build a cache of I/O addresses + * + * Build a cache of pci i/o addresses. This cache will be used to + * find the pci device that corresponds to a given address. + * This routine scans all pci busses to build the cache. + * Must be run late in boot process, after the pci controllers + * have been scaned for devices (after all device resources are known). + */ +void __init pci_addr_cache_build(void) +{ + struct device_node *dn; + struct pci_dev *dev = NULL; + + spin_lock_init(&pci_io_addr_cache_root.piar_lock); + + while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { + /* Ignore PCI bridges */ + if ((dev->class >> 16) == PCI_BASE_CLASS_BRIDGE) + continue; + + pci_addr_cache_insert_device(dev); + + /* Save the BAR's; firmware doesn't restore these after EEH reset */ + dn = pci_device_to_OF_node(dev); + eeh_save_bars(dev, PCI_DN(dn)); + } + +#ifdef DEBUG + /* Verify tree built up above, echo back the list of addrs. */ + pci_addr_cache_print(&pci_io_addr_cache_root); +#endif +} + diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h index caf67a3bcb7..79239a200f1 100644 --- a/include/asm-powerpc/ppc-pci.h +++ b/include/asm-powerpc/ppc-pci.h @@ -52,6 +52,14 @@ extern unsigned long pci_probe_only; /* ---- EEH internal-use-only related routines ---- */ #ifdef CONFIG_EEH + +void pci_addr_cache_insert_device(struct pci_dev *dev); +void pci_addr_cache_remove_device(struct pci_dev *dev); +void pci_addr_cache_build(void); +struct pci_dev *pci_get_device_by_addr(unsigned long addr); + +void eeh_save_bars(struct pci_dev * pdev, struct pci_dn *pdn); + /** * eeh_slot_error_detail -- record and EEH error condition to the log * @severity: 1 if temporary, 2 if permanent failure. -- cgit v1.2.3-70-g09d2 From 25e591f6dd07365cbf0b1c2454386ce597dd5e05 Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:53:20 -0600 Subject: [PATCH] powerpc: Add "partitionable endpoint" support 26-eeh-partition-endpoint.patch New versions of firmware introduce a new method by which the "partitionable endpoint" (the point at which the pci bus is cut) should be located. This code adds the support for this (mandatory) new feature. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from 9fcfb5d35b5294659f9299aa9cae6fd16325c07e commit) --- arch/powerpc/platforms/pseries/eeh.c | 26 ++++++++++++++++++++++++-- include/asm-powerpc/pci-bridge.h | 1 + 2 files changed, 25 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 57bef2c2f32..46ea4acd990 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -82,6 +82,7 @@ static int ibm_set_slot_reset; static int ibm_read_slot_reset_state; static int ibm_read_slot_reset_state2; static int ibm_slot_error_detail; +static int ibm_get_config_addr_info; int eeh_subsystem_enabled; EXPORT_SYMBOL(eeh_subsystem_enabled); @@ -457,6 +458,7 @@ eeh_slot_availability(struct pci_dn *pdn) static void rtas_pci_slot_reset(struct pci_dn *pdn, int state) { + int config_addr; int rc; BUG_ON (pdn==NULL); @@ -467,8 +469,13 @@ rtas_pci_slot_reset(struct pci_dn *pdn, int state) return; } + /* Use PE configuration address, if present */ + config_addr = pdn->eeh_config_addr; + if (pdn->eeh_pe_config_addr) + config_addr = pdn->eeh_pe_config_addr; + rc = rtas_call(ibm_set_slot_reset,4,1, NULL, - pdn->eeh_config_addr, + config_addr, BUID_HI(pdn->phb->buid), BUID_LO(pdn->phb->buid), state); @@ -695,8 +702,22 @@ static void *early_enable_eeh(struct device_node *dn, void *data) eeh_subsystem_enabled = 1; pdn->eeh_mode |= EEH_MODE_SUPPORTED; pdn->eeh_config_addr = regs[0]; + + /* If the newer, better, ibm,get-config-addr-info is supported, + * then use that instead. */ + pdn->eeh_pe_config_addr = 0; + if (ibm_get_config_addr_info != RTAS_UNKNOWN_SERVICE) { + unsigned int rets[2]; + ret = rtas_call (ibm_get_config_addr_info, 4, 2, rets, + pdn->eeh_config_addr, + info->buid_hi, info->buid_lo, + 0); + if (ret == 0) + pdn->eeh_pe_config_addr = rets[0]; + } #ifdef DEBUG - printk(KERN_DEBUG "EEH: %s: eeh enabled\n", dn->full_name); + printk(KERN_DEBUG "EEH: %s: eeh enabled, config=%x pe_config=%x\n", + dn->full_name, pdn->eeh_config_addr, pdn->eeh_pe_config_addr); #endif } else { @@ -748,6 +769,7 @@ void __init eeh_init(void) ibm_read_slot_reset_state2 = rtas_token("ibm,read-slot-reset-state2"); ibm_read_slot_reset_state = rtas_token("ibm,read-slot-reset-state"); ibm_slot_error_detail = rtas_token("ibm,slot-error-detail"); + ibm_get_config_addr_info = rtas_token("ibm,get-config-addr-info"); if (ibm_set_eeh_option == RTAS_UNKNOWN_SERVICE) return; diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h index 1a08860e789..a81bc363f35 100644 --- a/include/asm-powerpc/pci-bridge.h +++ b/include/asm-powerpc/pci-bridge.h @@ -68,6 +68,7 @@ struct pci_dn { #ifdef CONFIG_PPC_PSERIES int eeh_mode; /* See eeh.h for possible EEH_MODEs */ int eeh_config_addr; + int eeh_pe_config_addr; /* new-style partition endpoint address */ int eeh_check_count; /* # times driver ignored error */ int eeh_freeze_count; /* # times this device froze up. */ int eeh_is_bridge; /* device is pci-to-pci bridge */ -- cgit v1.2.3-70-g09d2 From f751f84164bec4f38037b221a194c54d96c73d06 Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:54:23 -0600 Subject: [PATCH] powerpc: remove bogus printk 233-eeh-buid-fix.patch Remove un-desired warning print from EEH code. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from 241239e6aff69788a177d97c5d06fe9995c74cca commit) --- arch/powerpc/platforms/pseries/eeh.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 46ea4acd990..be981407525 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -824,12 +824,10 @@ void eeh_add_device_early(struct device_node *dn) if (!dn || !PCI_DN(dn)) return; phb = PCI_DN(dn)->phb; - if (NULL == phb || 0 == phb->buid) { - printk(KERN_WARNING "EEH: Expected buid but found none for %s\n", - dn->full_name); - dump_stack(); + + /* USB Bus children of PCI devices will not have BUID's */ + if (NULL == phb || 0 == phb->buid) return; - } info.buid_hi = BUID_HI(phb->buid); info.buid_lo = BUID_LO(phb->buid); -- cgit v1.2.3-70-g09d2 From 9fb40eb883ad2d22ad6975b4323cb76e018fa280 Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:54:29 -0600 Subject: [PATCH] powerpc: Remove duplicate code 234-eeh-find-pe.patch The find_device_pe() routine is duplicated in two files. Remove one of the two copies, declare the other extern. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from 48408e708282d4d0269136ff27ea5acbd9410b5a commit) --- arch/powerpc/platforms/pseries/eeh.c | 2 +- arch/powerpc/platforms/pseries/eeh_driver.c | 13 ------------- include/asm-powerpc/ppc-pci.h | 3 +++ 3 files changed, 4 insertions(+), 14 deletions(-) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index be981407525..d9662688c8b 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -172,7 +172,7 @@ static inline unsigned long eeh_token_to_phys(unsigned long token) /** * Return the "partitionable endpoint" (pe) under which this device lies */ -static struct device_node * find_device_pe(struct device_node *dn) +struct device_node * find_device_pe(struct device_node *dn) { while ((dn->parent) && PCI_DN(dn->parent) && (PCI_DN(dn->parent)->eeh_mode & EEH_MODE_SUPPORTED)) { diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c index f6cff065d89..199a3ce5478 100644 --- a/arch/powerpc/platforms/pseries/eeh_driver.c +++ b/arch/powerpc/platforms/pseries/eeh_driver.c @@ -42,19 +42,6 @@ static inline const char * pcid_name (struct pci_dev *pdev) return ""; } -/** - * Return the "partitionable endpoint" (pe) under which this device lies - */ -static struct device_node * find_device_pe(struct device_node *dn) -{ - while ((dn->parent) && PCI_DN(dn->parent) && - (PCI_DN(dn->parent)->eeh_mode & EEH_MODE_SUPPORTED)) { - dn = dn->parent; - } - return dn; -} - - #ifdef DEBUG static void print_device_node_tree (struct pci_dn *pdn, int dent) { diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h index 79239a200f1..4820b368bf1 100644 --- a/include/asm-powerpc/ppc-pci.h +++ b/include/asm-powerpc/ppc-pci.h @@ -109,6 +109,9 @@ int rtas_write_config(struct pci_dn *, int where, int size, u32 val); void eeh_mark_slot (struct device_node *dn, int mode_flag); void eeh_clear_slot (struct device_node *dn, int mode_flag); +/* Find the associated "Partiationable Endpoint" PE */ +struct device_node * find_device_pe(struct device_node *dn); + #endif #endif /* __KERNEL__ */ -- cgit v1.2.3-70-g09d2 From 821b537fd7bf9018f1df4b882cea199613147f65 Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:54:34 -0600 Subject: [PATCH] powerpc: bugfix: fill in uninitialized field 235-eeh-set-pcidev-bugfix.patch The pci device field of the pci_dn struct should be initialized to a valid value. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from beb45c93d494a11c36e5b24f638e610db8428b54 commit) --- arch/powerpc/platforms/pseries/eeh_cache.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/powerpc/platforms/pseries/eeh_cache.c b/arch/powerpc/platforms/pseries/eeh_cache.c index 9fe2a7de04c..ff6c938f424 100644 --- a/arch/powerpc/platforms/pseries/eeh_cache.c +++ b/arch/powerpc/platforms/pseries/eeh_cache.c @@ -307,6 +307,9 @@ void __init pci_addr_cache_build(void) /* Save the BAR's; firmware doesn't restore these after EEH reset */ dn = pci_device_to_OF_node(dev); eeh_save_bars(dev, PCI_DN(dn)); + + pci_dev_get (dev); /* matching put is in eeh_remove_device() */ + PCI_DN(dn)->pcidev = dev; } #ifdef DEBUG -- cgit v1.2.3-70-g09d2 From fcb7543e3d01ad9ebd3498eb50fcf323edb163ab Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:54:39 -0600 Subject: [PATCH] powerpc: Use PE configuration address consistently 236-eeh-config-addr.patch The PE configuration address wasn't being cnsistently used in all locations where a config address is called for. This patch adds it to the places it should have appeared in. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from c2bc904a28095aca0b04a37854b63b78622a032e commit) --- arch/powerpc/platforms/pseries/eeh.c | 27 +++++++++++++++++++++++---- 1 file changed, 23 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index d9662688c8b..4da77571288 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -110,6 +110,7 @@ static DEFINE_PER_CPU(unsigned long, slot_resets); void eeh_slot_error_detail (struct pci_dn *pdn, int severity) { + int config_addr; unsigned long flags; int rc; @@ -117,8 +118,13 @@ void eeh_slot_error_detail (struct pci_dn *pdn, int severity) spin_lock_irqsave(&slot_errbuf_lock, flags); memset(slot_errbuf, 0, eeh_error_buf_size); + /* Use PE configuration address, if present */ + config_addr = pdn->eeh_config_addr; + if (pdn->eeh_pe_config_addr) + config_addr = pdn->eeh_pe_config_addr; + rc = rtas_call(ibm_slot_error_detail, - 8, 1, NULL, pdn->eeh_config_addr, + 8, 1, NULL, config_addr, BUID_HI(pdn->phb->buid), BUID_LO(pdn->phb->buid), NULL, 0, virt_to_phys(slot_errbuf), @@ -138,6 +144,7 @@ void eeh_slot_error_detail (struct pci_dn *pdn, int severity) static int read_slot_reset_state(struct pci_dn *pdn, int rets[]) { int token, outputs; + int config_addr; if (ibm_read_slot_reset_state2 != RTAS_UNKNOWN_SERVICE) { token = ibm_read_slot_reset_state2; @@ -148,7 +155,12 @@ static int read_slot_reset_state(struct pci_dn *pdn, int rets[]) outputs = 3; } - return rtas_call(token, 3, outputs, rets, pdn->eeh_config_addr, + /* Use PE configuration address, if present */ + config_addr = pdn->eeh_config_addr; + if (pdn->eeh_pe_config_addr) + config_addr = pdn->eeh_pe_config_addr; + + return rtas_call(token, 3, outputs, rets, config_addr, BUID_HI(pdn->phb->buid), BUID_LO(pdn->phb->buid)); } @@ -284,7 +296,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) return 0; } - if (!pdn->eeh_config_addr) { + if (!pdn->eeh_config_addr && !pdn->eeh_pe_config_addr) { __get_cpu_var(no_cfg_addr)++; return 0; } @@ -613,13 +625,20 @@ void eeh_save_bars(struct pci_dev * pdev, struct pci_dn *pdn) void rtas_configure_bridge(struct pci_dn *pdn) { + int config_addr; int token = rtas_token ("ibm,configure-bridge"); int rc; if (token == RTAS_UNKNOWN_SERVICE) return; + + /* Use PE configuration address, if present */ + config_addr = pdn->eeh_config_addr; + if (pdn->eeh_pe_config_addr) + config_addr = pdn->eeh_pe_config_addr; + rc = rtas_call(token,3,1, NULL, - pdn->eeh_config_addr, + config_addr, BUID_HI(pdn->phb->buid), BUID_LO(pdn->phb->buid)); if (rc) { -- cgit v1.2.3-70-g09d2 From 21e464dd7c943c984dcccd9aff8c9f6a5ea920d7 Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:54:47 -0600 Subject: [PATCH] powerpc: set up the RTAS token just like the rest of them. 237-eeh-bridge-token.patch Minor: the rtas-bridge token should be set up the same way that all the other rtas tokens are set up. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from 78379b6c5fc17b6666c40b05988e6708e98479c0 commit) --- arch/powerpc/platforms/pseries/eeh.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 4da77571288..d8d24502970 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -83,6 +83,7 @@ static int ibm_read_slot_reset_state; static int ibm_read_slot_reset_state2; static int ibm_slot_error_detail; static int ibm_get_config_addr_info; +static int ibm_configure_bridge; int eeh_subsystem_enabled; EXPORT_SYMBOL(eeh_subsystem_enabled); @@ -626,18 +627,14 @@ void rtas_configure_bridge(struct pci_dn *pdn) { int config_addr; - int token = rtas_token ("ibm,configure-bridge"); int rc; - if (token == RTAS_UNKNOWN_SERVICE) - return; - /* Use PE configuration address, if present */ config_addr = pdn->eeh_config_addr; if (pdn->eeh_pe_config_addr) config_addr = pdn->eeh_pe_config_addr; - rc = rtas_call(token,3,1, NULL, + rc = rtas_call(ibm_configure_bridge,3,1, NULL, config_addr, BUID_HI(pdn->phb->buid), BUID_LO(pdn->phb->buid)); @@ -789,6 +786,7 @@ void __init eeh_init(void) ibm_read_slot_reset_state = rtas_token("ibm,read-slot-reset-state"); ibm_slot_error_detail = rtas_token("ibm,slot-error-detail"); ibm_get_config_addr_info = rtas_token("ibm,get-config-addr-info"); + ibm_configure_bridge = rtas_token ("ibm,configure-bridge"); if (ibm_set_eeh_option == RTAS_UNKNOWN_SERVICE) return; -- cgit v1.2.3-70-g09d2 From b6495c0c8f100b882d85774f44529519befefba9 Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:54:54 -0600 Subject: [PATCH] powerpc: Don't continue with PCI Error recovery if slot reset failed. 238-eeh-stop-if-reset_failed.patch If the firmware is unable to reset the PCI slot for some reason, then don't attempt any further recovery steps after that point. Instead, mark the device as permanently failed. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from e06b942521eb2cdaf232726f45a820d5837acb12 commit) --- arch/powerpc/platforms/pseries/eeh.c | 24 +++++++-- arch/powerpc/platforms/pseries/eeh_driver.c | 81 ++++++++++++++++------------- include/asm-powerpc/ppc-pci.h | 4 +- 3 files changed, 69 insertions(+), 40 deletions(-) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index d8d24502970..b0fa76d0c78 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -450,11 +450,16 @@ eeh_slot_availability(struct pci_dn *pdn) if (rc) return rc; if (rets[1] == 0) return -1; /* EEH is not supported */ - if (rets[0] == 0) return 0; /* Oll Korrect */ + if (rets[0] == 0) return 0; /* Oll Korrect */ if (rets[0] == 5) { if (rets[2] == 0) return -1; /* permanently unavailable */ return rets[2]; /* number of millisecs to wait */ } + if (rets[0] == 1) + return 250; + + printk (KERN_ERR "EEH: Slot unavailable: rc=%d, rets=%d %d %d\n", + rc, rets[0], rets[1], rets[2]); return -1; } @@ -501,9 +506,11 @@ rtas_pci_slot_reset(struct pci_dn *pdn, int state) /** rtas_set_slot_reset -- assert the pci #RST line for 1/4 second * dn -- device node to be reset. + * + * Return 0 if success, else a non-zero value. */ -void +int rtas_set_slot_reset(struct pci_dn *pdn) { int i, rc; @@ -533,10 +540,21 @@ rtas_set_slot_reset(struct pci_dn *pdn) * ready to be used; if not, wait for recovery. */ for (i=0; i<10; i++) { rc = eeh_slot_availability (pdn); - if (rc <= 0) break; + if (rc < 0) + printk (KERN_ERR "EEH: failed (%d) to reset slot %s\n", rc, pdn->node->full_name); + if (rc == 0) + return 0; + if (rc < 0) + return -1; msleep (rc+100); } + + rc = eeh_slot_availability (pdn); + if (rc) + printk (KERN_ERR "EEH: timeout resetting slot %s\n", pdn->node->full_name); + + return rc; } /* ------------------------------------------------------- */ diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c index 199a3ce5478..242b2923360 100644 --- a/arch/powerpc/platforms/pseries/eeh_driver.c +++ b/arch/powerpc/platforms/pseries/eeh_driver.c @@ -200,14 +200,18 @@ static void eeh_report_failure(struct pci_dev *dev, void *userdata) * bus resets can be performed. */ -static void eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus) +static int eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus) { + int rc; if (bus) pcibios_remove_pci_devices(bus); /* Reset the pci controller. (Asserts RST#; resets config space). - * Reconfigure bridges and devices */ - rtas_set_slot_reset(pe_dn); + * Reconfigure bridges and devices. Don't try to bring the system + * up if the reset failed for some reason. */ + rc = rtas_set_slot_reset(pe_dn); + if (rc) + return rc; /* Walk over all functions on this device */ rtas_configure_bridge(pe_dn); @@ -223,6 +227,8 @@ static void eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus) ssleep (5); pcibios_add_pci_devices(bus); } + + return 0; } /* The longest amount of time to wait for a pci device @@ -235,7 +241,7 @@ void handle_eeh_events (struct eeh_event *event) struct device_node *frozen_dn; struct pci_dn *frozen_pdn; struct pci_bus *frozen_bus; - int perm_failure = 0; + int rc = 0; frozen_dn = find_device_pe(event->dn); frozen_bus = pcibios_find_pci_bus(frozen_dn); @@ -272,7 +278,7 @@ void handle_eeh_events (struct eeh_event *event) frozen_pdn->eeh_freeze_count++; if (frozen_pdn->eeh_freeze_count > EEH_MAX_ALLOWED_FREEZES) - perm_failure = 1; + goto hard_fail; /* If the reset state is a '5' and the time to reset is 0 (infinity) * or is more then 15 seconds, then mark this as a permanent failure. @@ -280,34 +286,7 @@ void handle_eeh_events (struct eeh_event *event) if ((event->state == pci_channel_io_perm_failure) && ((event->time_unavail <= 0) || (event->time_unavail > MAX_WAIT_FOR_RECOVERY*1000))) - { - perm_failure = 1; - } - - /* Log the error with the rtas logger. */ - if (perm_failure) { - /* - * About 90% of all real-life EEH failures in the field - * are due to poorly seated PCI cards. Only 10% or so are - * due to actual, failed cards. - */ - printk(KERN_ERR - "EEH: PCI device %s - %s has failed %d times \n" - "and has been permanently disabled. Please try reseating\n" - "this device or replacing it.\n", - pci_name (frozen_pdn->pcidev), - pcid_name(frozen_pdn->pcidev), - frozen_pdn->eeh_freeze_count); - - eeh_slot_error_detail(frozen_pdn, 2 /* Permanent Error */); - - /* Notify all devices that they're about to go down. */ - pci_walk_bus(frozen_bus, eeh_report_failure, 0); - - /* Shut down the device drivers for good. */ - pcibios_remove_pci_devices(frozen_bus); - return; - } + goto hard_fail; eeh_slot_error_detail(frozen_pdn, 1 /* Temporary Error */); printk(KERN_WARNING @@ -330,24 +309,54 @@ void handle_eeh_events (struct eeh_event *event) * go down willingly, without panicing the system. */ if (result == PCIERR_RESULT_NONE) { - eeh_reset_device(frozen_pdn, frozen_bus); + rc = eeh_reset_device(frozen_pdn, frozen_bus); + if (rc) + goto hard_fail; } /* If any device called out for a reset, then reset the slot */ if (result == PCIERR_RESULT_NEED_RESET) { - eeh_reset_device(frozen_pdn, NULL); + rc = eeh_reset_device(frozen_pdn, NULL); + if (rc) + goto hard_fail; pci_walk_bus(frozen_bus, eeh_report_reset, 0); } /* If all devices reported they can proceed, the re-enable PIO */ if (result == PCIERR_RESULT_CAN_RECOVER) { /* XXX Not supported; we brute-force reset the device */ - eeh_reset_device(frozen_pdn, NULL); + rc = eeh_reset_device(frozen_pdn, NULL); + if (rc) + goto hard_fail; pci_walk_bus(frozen_bus, eeh_report_reset, 0); } /* Tell all device drivers that they can resume operations */ pci_walk_bus(frozen_bus, eeh_report_resume, 0); + + return; + +hard_fail: + /* + * About 90% of all real-life EEH failures in the field + * are due to poorly seated PCI cards. Only 10% or so are + * due to actual, failed cards. + */ + printk(KERN_ERR + "EEH: PCI device %s - %s has failed %d times \n" + "and has been permanently disabled. Please try reseating\n" + "this device or replacing it.\n", + pci_name (frozen_pdn->pcidev), + pcid_name(frozen_pdn->pcidev), + frozen_pdn->eeh_freeze_count); + + eeh_slot_error_detail(frozen_pdn, 2 /* Permanent Error */); + + /* Notify all devices that they're about to go down. */ + pci_walk_bus(frozen_bus, eeh_report_failure, 0); + + /* Shut down the device drivers for good. */ + pcibios_remove_pci_devices(frozen_bus); } /* ---------- end of file ---------- */ diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h index 4820b368bf1..1a2db61694f 100644 --- a/include/asm-powerpc/ppc-pci.h +++ b/include/asm-powerpc/ppc-pci.h @@ -76,8 +76,10 @@ void eeh_slot_error_detail (struct pci_dn *pdn, int severity); * does this by asserting the PCI #RST line for 1/8th of * a second; this routine will sleep while the adapter is * being reset. + * + * Returns a non-zero value if the reset failed. */ -void rtas_set_slot_reset (struct pci_dn *); +int rtas_set_slot_reset (struct pci_dn *); /** * eeh_restore_bars - Restore device configuration info. -- cgit v1.2.3-70-g09d2 From 3914ac7b0e672131dc2ac8b415ada79c4ccbbb31 Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:55:01 -0600 Subject: [PATCH] powerpc: handle multifunction PCI devices properly 239-eeh-multifunction-consolidate.patch New-style firmware will often place multiple different functions under a non-EEH-aware parent. However, these devices might share a common PE "partition endpoint" and config address, ad thus any EEH events will affect all of the devices in common. This patch makes the effort to find all of these common devices and handle them together. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from 216810296bb97d39da8e176822e9de78d2f00187 commit) --- arch/powerpc/platforms/pseries/eeh.c | 13 ++++++++++++- arch/powerpc/platforms/pseries/eeh_driver.c | 20 +++++++++++++++++--- 2 files changed, 29 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index b0fa76d0c78..02bc1f9d20b 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -223,6 +223,11 @@ static void __eeh_mark_slot (struct device_node *dn, int mode_flag) void eeh_mark_slot (struct device_node *dn, int mode_flag) { dn = find_device_pe (dn); + + /* Back up one, since config addrs might be shared */ + if (PCI_DN(dn) && PCI_DN(dn)->eeh_pe_config_addr) + dn = dn->parent; + PCI_DN(dn)->eeh_mode |= mode_flag; __eeh_mark_slot (dn->child, mode_flag); } @@ -244,7 +249,13 @@ void eeh_clear_slot (struct device_node *dn, int mode_flag) { unsigned long flags; spin_lock_irqsave(&confirm_error_lock, flags); + dn = find_device_pe (dn); + + /* Back up one, since config addrs might be shared */ + if (PCI_DN(dn) && PCI_DN(dn)->eeh_pe_config_addr) + dn = dn->parent; + PCI_DN(dn)->eeh_mode &= ~mode_flag; PCI_DN(dn)->eeh_check_count = 0; __eeh_clear_slot (dn->child, mode_flag); @@ -609,7 +620,7 @@ void eeh_restore_bars(struct pci_dn *pdn) if (!pdn) return; - if (! pdn->eeh_is_bridge) + if ((pdn->eeh_mode & EEH_MODE_SUPPORTED) && (!pdn->eeh_is_bridge)) __restore_bars (pdn); dn = pdn->node->child; diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c index 242b2923360..1c97c89597f 100644 --- a/arch/powerpc/platforms/pseries/eeh_driver.c +++ b/arch/powerpc/platforms/pseries/eeh_driver.c @@ -213,9 +213,23 @@ static int eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus) if (rc) return rc; - /* Walk over all functions on this device */ - rtas_configure_bridge(pe_dn); - eeh_restore_bars(pe_dn); + /* New-style config addrs might be shared across multiple devices, + * Walk over all functions on this device */ + if (pe_dn->eeh_pe_config_addr) { + struct device_node *pe = pe_dn->node; + pe = pe->parent->child; + while (pe) { + struct pci_dn *ppe = PCI_DN(pe); + if (pe_dn->eeh_pe_config_addr == ppe->eeh_pe_config_addr) { + rtas_configure_bridge(ppe); + eeh_restore_bars(ppe); + } + pe = pe->sibling; + } + } else { + rtas_configure_bridge(pe_dn); + eeh_restore_bars(pe_dn); + } /* Give the system 5 seconds to finish running the user-space * hotplug shutdown scripts, e.g. ifdown for ethernet. Yes, -- cgit v1.2.3-70-g09d2 From d177c207ba16b1db31283e2d1fee7ad4a863584b Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:55:14 -0600 Subject: [PATCH] powerpc: IOMMU: don't ioremap null addresses 240-ioremap-null-ptr-test.patch Under highly unusual circumstances, a buggy driver will ask a null ptr to be ioremapped, an operation that curently succeeds but leads to later trouble. Instead, refuse to remap the null pointer. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from e71d9e598533c1889e7162f5f4647e5d378c102c commit) --- arch/powerpc/mm/pgtable_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index 2ffca63602c..7b278d83739 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -174,7 +174,7 @@ void __iomem * __ioremap(unsigned long addr, unsigned long size, pa = addr & PAGE_MASK; size = PAGE_ALIGN(addr + size) - pa; - if (size == 0) + if ((size == 0) || (pa == 0)) return NULL; if (mem_init_done) { -- cgit v1.2.3-70-g09d2 From 7684b40cb53ba00cc51271f1c42897b776c48fbc Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:55:19 -0600 Subject: [PATCH] powerpc: Save device BARs much earlier in the boot sequence 241-eeh-save-bars-earlier.patch Save the PCI device bars *before* any PCI probing is done. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from 76c902b919098860f3d4e125f847abcc4cb1782a commit) --- arch/powerpc/kernel/rtas_pci.c | 2 +- arch/powerpc/platforms/pseries/eeh.c | 16 ++++++++-------- arch/powerpc/platforms/pseries/eeh_cache.c | 3 --- include/asm-powerpc/pci-bridge.h | 8 ++++---- include/asm-powerpc/ppc-pci.h | 3 +-- 5 files changed, 14 insertions(+), 18 deletions(-) diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c index 45b8109951f..5579f655991 100644 --- a/arch/powerpc/kernel/rtas_pci.c +++ b/arch/powerpc/kernel/rtas_pci.c @@ -72,7 +72,7 @@ static int of_device_available(struct device_node * dn) return 0; } -static int rtas_read_config(struct pci_dn *pdn, int where, int size, u32 *val) +int rtas_read_config(struct pci_dn *pdn, int where, int size, u32 *val) { int returnval = -1; unsigned long buid, addr; diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 02bc1f9d20b..9e597cb7e65 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -106,6 +106,8 @@ static DEFINE_PER_CPU(unsigned long, false_positives); static DEFINE_PER_CPU(unsigned long, ignored_failures); static DEFINE_PER_CPU(unsigned long, slot_resets); +#define IS_BRIDGE(class_code) (((class_code)<<16) == PCI_BASE_CLASS_BRIDGE) + /* --------------------------------------------------------------- */ /* Below lies the EEH event infrastructure */ @@ -620,7 +622,7 @@ void eeh_restore_bars(struct pci_dn *pdn) if (!pdn) return; - if ((pdn->eeh_mode & EEH_MODE_SUPPORTED) && (!pdn->eeh_is_bridge)) + if ((pdn->eeh_mode & EEH_MODE_SUPPORTED) && !IS_BRIDGE(pdn->class_code)) __restore_bars (pdn); dn = pdn->node->child; @@ -638,18 +640,15 @@ void eeh_restore_bars(struct pci_dn *pdn) * PCI devices are added individuallly; but, for the restore, * an entire slot is reset at a time. */ -void eeh_save_bars(struct pci_dev * pdev, struct pci_dn *pdn) +static void eeh_save_bars(struct pci_dn *pdn) { int i; - if (!pdev || !pdn ) + if (!pdn ) return; for (i = 0; i < 16; i++) - pci_read_config_dword(pdev, i * 4, &pdn->config_space[i]); - - if (pdev->hdr_type == PCI_HEADER_TYPE_BRIDGE) - pdn->eeh_is_bridge = 1; + rtas_read_config(pdn, i * 4, 4, &pdn->config_space[i]); } void @@ -699,6 +698,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data) int enable; struct pci_dn *pdn = PCI_DN(dn); + pdn->class_code = *class_code; pdn->eeh_mode = 0; pdn->eeh_check_count = 0; pdn->eeh_freeze_count = 0; @@ -781,6 +781,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data) dn->full_name); } + eeh_save_bars(pdn); return NULL; } @@ -915,7 +916,6 @@ void eeh_add_device_late(struct pci_dev *dev) pdn->pcidev = dev; pci_addr_cache_insert_device (dev); - eeh_save_bars(dev, pdn); } EXPORT_SYMBOL_GPL(eeh_add_device_late); diff --git a/arch/powerpc/platforms/pseries/eeh_cache.c b/arch/powerpc/platforms/pseries/eeh_cache.c index ff6c938f424..71b2187581a 100644 --- a/arch/powerpc/platforms/pseries/eeh_cache.c +++ b/arch/powerpc/platforms/pseries/eeh_cache.c @@ -304,10 +304,7 @@ void __init pci_addr_cache_build(void) pci_addr_cache_insert_device(dev); - /* Save the BAR's; firmware doesn't restore these after EEH reset */ dn = pci_device_to_OF_node(dev); - eeh_save_bars(dev, PCI_DN(dn)); - pci_dev_get (dev); /* matching put is in eeh_remove_device() */ PCI_DN(dn)->pcidev = dev; } diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h index a81bc363f35..b0d816fe2e2 100644 --- a/include/asm-powerpc/pci-bridge.h +++ b/include/asm-powerpc/pci-bridge.h @@ -61,9 +61,10 @@ struct pci_controller; struct iommu_table; struct pci_dn { - int busno; /* for pci devices */ - int bussubno; /* for pci devices */ - int devfn; /* for pci devices */ + int busno; /* pci bus number */ + int bussubno; /* pci subordinate bus number */ + int devfn; /* pci device and function number */ + int class_code; /* pci device class */ #ifdef CONFIG_PPC_PSERIES int eeh_mode; /* See eeh.h for possible EEH_MODEs */ @@ -71,7 +72,6 @@ struct pci_dn { int eeh_pe_config_addr; /* new-style partition endpoint address */ int eeh_check_count; /* # times driver ignored error */ int eeh_freeze_count; /* # times this device froze up. */ - int eeh_is_bridge; /* device is pci-to-pci bridge */ #endif int pci_ext_config_space; /* for pci devices */ struct pci_controller *phb; /* for pci devices */ diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h index 1a2db61694f..f80482c7231 100644 --- a/include/asm-powerpc/ppc-pci.h +++ b/include/asm-powerpc/ppc-pci.h @@ -58,8 +58,6 @@ void pci_addr_cache_remove_device(struct pci_dev *dev); void pci_addr_cache_build(void); struct pci_dev *pci_get_device_by_addr(unsigned long addr); -void eeh_save_bars(struct pci_dev * pdev, struct pci_dn *pdn); - /** * eeh_slot_error_detail -- record and EEH error condition to the log * @severity: 1 if temporary, 2 if permanent failure. @@ -103,6 +101,7 @@ void eeh_restore_bars(struct pci_dn *); void rtas_configure_bridge(struct pci_dn *); int rtas_write_config(struct pci_dn *, int where, int size, u32 val); +int rtas_read_config(struct pci_dn *, int where, int size, u32 *val); /** * mark and clear slots: find "partition endpoint" PE and set or -- cgit v1.2.3-70-g09d2 From 257ffc64a6c22621ecb0371b7f10d5b40b74c878 Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Thu, 3 Nov 2005 18:55:25 -0600 Subject: [PATCH] powerpc: get rid of per_cpu EEH counters 242-eeh-no-percpu-counters.patch Remove per-cpu counters from the EEH code. These statistics counters are incremented at a very low frequency, and the performance gains of per-cpu variables are negligable. By contrast, the counters weren't safe against cpu off/online operations, and its not worth the effort to make them so (other than to turn them into plain globals). Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from be3b5d1be053ccb41e91fa5a6f43ef5db301357d commit) --- arch/powerpc/platforms/pseries/eeh.c | 60 ++++++++++++++---------------------- 1 file changed, 23 insertions(+), 37 deletions(-) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 9e597cb7e65..136365c1f8e 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -97,14 +97,14 @@ static DEFINE_SPINLOCK(slot_errbuf_lock); static int eeh_error_buf_size; /* System monitoring statistics */ -static DEFINE_PER_CPU(unsigned long, no_device); -static DEFINE_PER_CPU(unsigned long, no_dn); -static DEFINE_PER_CPU(unsigned long, no_cfg_addr); -static DEFINE_PER_CPU(unsigned long, ignored_check); -static DEFINE_PER_CPU(unsigned long, total_mmio_ffs); -static DEFINE_PER_CPU(unsigned long, false_positives); -static DEFINE_PER_CPU(unsigned long, ignored_failures); -static DEFINE_PER_CPU(unsigned long, slot_resets); +static unsigned long no_device; +static unsigned long no_dn; +static unsigned long no_cfg_addr; +static unsigned long ignored_check; +static unsigned long total_mmio_ffs; +static unsigned long false_positives; +static unsigned long ignored_failures; +static unsigned long slot_resets; #define IS_BRIDGE(class_code) (((class_code)<<16) == PCI_BASE_CLASS_BRIDGE) @@ -288,13 +288,13 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) enum pci_channel_state state; int rc = 0; - __get_cpu_var(total_mmio_ffs)++; + total_mmio_ffs++; if (!eeh_subsystem_enabled) return 0; if (!dn) { - __get_cpu_var(no_dn)++; + no_dn++; return 0; } pdn = PCI_DN(dn); @@ -302,7 +302,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) /* Access to IO BARs might get this far and still not want checking. */ if (!(pdn->eeh_mode & EEH_MODE_SUPPORTED) || pdn->eeh_mode & EEH_MODE_NOCHECK) { - __get_cpu_var(ignored_check)++; + ignored_check++; #ifdef DEBUG printk ("EEH:ignored check (%x) for %s %s\n", pdn->eeh_mode, pci_name (dev), dn->full_name); @@ -311,7 +311,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) } if (!pdn->eeh_config_addr && !pdn->eeh_pe_config_addr) { - __get_cpu_var(no_cfg_addr)++; + no_cfg_addr++; return 0; } @@ -353,7 +353,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) if (ret != 0) { printk(KERN_WARNING "EEH: read_slot_reset_state() failed; rc=%d dn=%s\n", ret, dn->full_name); - __get_cpu_var(false_positives)++; + false_positives++; rc = 0; goto dn_unlock; } @@ -362,14 +362,14 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) if (rets[1] != 1) { printk(KERN_WARNING "EEH: event on unsupported device, rc=%d dn=%s\n", ret, dn->full_name); - __get_cpu_var(false_positives)++; + false_positives++; rc = 0; goto dn_unlock; } /* If not the kind of error we know about, punt. */ if (rets[0] != 2 && rets[0] != 4 && rets[0] != 5) { - __get_cpu_var(false_positives)++; + false_positives++; rc = 0; goto dn_unlock; } @@ -377,12 +377,12 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev) /* Note that config-io to empty slots may fail; * we recognize empty because they don't have children. */ if ((rets[0] == 5) && (dn->child == NULL)) { - __get_cpu_var(false_positives)++; + false_positives++; rc = 0; goto dn_unlock; } - __get_cpu_var(slot_resets)++; + slot_resets++; /* Avoid repeated reports of this failure, including problems * with other functions on this device, and functions under @@ -432,7 +432,7 @@ unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned lon addr = eeh_token_to_phys((unsigned long __force) token); dev = pci_get_device_by_addr(addr); if (!dev) { - __get_cpu_var(no_device)++; + no_device++; return val; } @@ -963,25 +963,9 @@ EXPORT_SYMBOL_GPL(eeh_remove_bus_device); static int proc_eeh_show(struct seq_file *m, void *v) { - unsigned int cpu; - unsigned long ffs = 0, positives = 0, failures = 0; - unsigned long resets = 0; - unsigned long no_dev = 0, no_dn = 0, no_cfg = 0, no_check = 0; - - for_each_cpu(cpu) { - ffs += per_cpu(total_mmio_ffs, cpu); - positives += per_cpu(false_positives, cpu); - failures += per_cpu(ignored_failures, cpu); - resets += per_cpu(slot_resets, cpu); - no_dev += per_cpu(no_device, cpu); - no_dn += per_cpu(no_dn, cpu); - no_cfg += per_cpu(no_cfg_addr, cpu); - no_check += per_cpu(ignored_check, cpu); - } - if (0 == eeh_subsystem_enabled) { seq_printf(m, "EEH Subsystem is globally disabled\n"); - seq_printf(m, "eeh_total_mmio_ffs=%ld\n", ffs); + seq_printf(m, "eeh_total_mmio_ffs=%ld\n", total_mmio_ffs); } else { seq_printf(m, "EEH Subsystem is enabled\n"); seq_printf(m, @@ -993,8 +977,10 @@ static int proc_eeh_show(struct seq_file *m, void *v) "eeh_false_positives=%ld\n" "eeh_ignored_failures=%ld\n" "eeh_slot_resets=%ld\n", - no_dev, no_dn, no_cfg, no_check, - ffs, positives, failures, resets); + no_device, no_dn, no_cfg_addr, + ignored_check, total_mmio_ffs, + false_positives, ignored_failures, + slot_resets); } return 0; -- cgit v1.2.3-70-g09d2 From 18eb3b398d92028e6f09f0423aa4e2a7b1096db3 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Tue, 29 Nov 2005 17:17:02 +1100 Subject: powerpc: Fix up some compile errors in the PCI error recovery code is gone now, and the PCI error recovery constants in include/linux/pci.h changed their names in the process of getting accepted. Signed-off-by: Paul Mackerras (cherry picked from 5a2516156c591fc3d2059fbd93f97e15eb6010d6 commit) --- arch/powerpc/platforms/pseries/eeh_cache.c | 1 - arch/powerpc/platforms/pseries/eeh_driver.c | 18 +++++++++--------- 2 files changed, 9 insertions(+), 10 deletions(-) diff --git a/arch/powerpc/platforms/pseries/eeh_cache.c b/arch/powerpc/platforms/pseries/eeh_cache.c index 71b2187581a..d4a402c5866 100644 --- a/arch/powerpc/platforms/pseries/eeh_cache.c +++ b/arch/powerpc/platforms/pseries/eeh_cache.c @@ -26,7 +26,6 @@ #include #include #include -#include #undef DEBUG diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c index 1c97c89597f..6373372932b 100644 --- a/arch/powerpc/platforms/pseries/eeh_driver.c +++ b/arch/powerpc/platforms/pseries/eeh_driver.c @@ -84,7 +84,7 @@ static int irq_in_use(unsigned int irq) static void eeh_report_error(struct pci_dev *dev, void *userdata) { - enum pcierr_result rc, *res = userdata; + enum pci_ers_result rc, *res = userdata; struct pci_driver *driver = dev->driver; dev->error_state = pci_channel_io_frozen; @@ -103,10 +103,10 @@ static void eeh_report_error(struct pci_dev *dev, void *userdata) return; rc = driver->err_handler->error_detected (dev, pci_channel_io_frozen); - if (*res == PCIERR_RESULT_NONE) *res = rc; - if (*res == PCIERR_RESULT_NEED_RESET) return; - if (*res == PCIERR_RESULT_DISCONNECT && - rc == PCIERR_RESULT_NEED_RESET) *res = rc; + if (*res == PCI_ERS_RESULT_NONE) *res = rc; + if (*res == PCI_ERS_RESULT_NEED_RESET) return; + if (*res == PCI_ERS_RESULT_DISCONNECT && + rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; } /** eeh_report_reset -- tell this device that the pci slot @@ -256,6 +256,7 @@ void handle_eeh_events (struct eeh_event *event) struct pci_dn *frozen_pdn; struct pci_bus *frozen_bus; int rc = 0; + enum pci_ers_result result = PCI_ERS_RESULT_NONE; frozen_dn = find_device_pe(event->dn); frozen_bus = pcibios_find_pci_bus(frozen_dn); @@ -315,21 +316,20 @@ void handle_eeh_events (struct eeh_event *event) * status ... if any child can't handle the reset, then the entire * slot is dlpar removed and added. */ - enum pcierr_result result = PCIERR_RESULT_NONE; pci_walk_bus(frozen_bus, eeh_report_error, &result); /* If all device drivers were EEH-unaware, then shut * down all of the device drivers, and hope they * go down willingly, without panicing the system. */ - if (result == PCIERR_RESULT_NONE) { + if (result == PCI_ERS_RESULT_NONE) { rc = eeh_reset_device(frozen_pdn, frozen_bus); if (rc) goto hard_fail; } /* If any device called out for a reset, then reset the slot */ - if (result == PCIERR_RESULT_NEED_RESET) { + if (result == PCI_ERS_RESULT_NEED_RESET) { rc = eeh_reset_device(frozen_pdn, NULL); if (rc) goto hard_fail; @@ -337,7 +337,7 @@ void handle_eeh_events (struct eeh_event *event) } /* If all devices reported they can proceed, the re-enable PIO */ - if (result == PCIERR_RESULT_CAN_RECOVER) { + if (result == PCI_ERS_RESULT_CAN_RECOVER) { /* XXX Not supported; we brute-force reset the device */ rc = eeh_reset_device(frozen_pdn, NULL); if (rc) -- cgit v1.2.3-70-g09d2 From 0f17574a651884c721e1a33051719e59deb13c18 Mon Sep 17 00:00:00 2001 From: linas Date: Thu, 1 Dec 2005 18:42:32 -0600 Subject: [PATCH] powerpc/pseries: dlpar-add crash on null pointer deref This fixes a crash on null-pointer deref during dlpar slot addition. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras (cherry picked from 1c87c0f84943fbbc91826967ff4fea1b059a526f commit) --- arch/powerpc/platforms/pseries/eeh.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index 136365c1f8e..17cea7f2afd 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -698,7 +698,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data) int enable; struct pci_dn *pdn = PCI_DN(dn); - pdn->class_code = *class_code; + pdn->class_code = 0; pdn->eeh_mode = 0; pdn->eeh_check_count = 0; pdn->eeh_freeze_count = 0; @@ -715,6 +715,7 @@ static void *early_enable_eeh(struct device_node *dn, void *data) pdn->eeh_mode |= EEH_MODE_NOCHECK; return NULL; } + pdn->class_code = *class_code; /* * Now decide if we are going to "Disable" EEH checking -- cgit v1.2.3-70-g09d2 From 13b8a272297b29870d5bf5f8db7a381dd9e82382 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Tue, 10 Jan 2006 16:19:05 +1100 Subject: powerpc: Introduce a new config symbol to control 16550 early debug code The previous change by Kumar Gala in this area led to legacy_serial.c and udbg_16550.c being built as modules when CONFIG_SERIAL_8250=m. Fix this by introducing a new symbol, CONFIG_PPC_UDBG_16550, to control whether these files get built, and arrange for it to be selected for those platforms that need it. Signed-off-by: Paul Mackerras --- arch/powerpc/Kconfig | 9 +++++++++ arch/powerpc/kernel/Makefile | 2 +- arch/powerpc/kernel/setup_32.c | 2 -- arch/powerpc/kernel/setup_64.c | 2 -- arch/powerpc/platforms/maple/setup.c | 3 --- include/asm-powerpc/serial.h | 4 ++++ 6 files changed, 14 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 28004f002ec..17c1b6aa44b 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -275,6 +275,7 @@ config PPC_PSERIES select PPC_I8259 select PPC_RTAS select RTAS_ERROR_LOGGING + select PPC_UDBG_16550 default y config PPC_CHRP @@ -284,6 +285,7 @@ config PPC_CHRP select PPC_INDIRECT_PCI select PPC_RTAS select PPC_MPC106 + select PPC_UDBG_16550 default y config PPC_PMAC @@ -306,6 +308,7 @@ config PPC_PREP depends on PPC_MULTIPLATFORM && PPC32 && BROKEN select PPC_I8259 select PPC_INDIRECT_PCI + select PPC_UDBG_16550 default y config PPC_MAPLE @@ -314,6 +317,7 @@ config PPC_MAPLE select U3_DART select MPIC_BROKEN_U3 select GENERIC_TBSYNC + select PPC_UDBG_16550 default n help This option enables support for the Maple 970FX Evaluation Board. @@ -324,6 +328,7 @@ config PPC_CELL depends on PPC_MULTIPLATFORM && PPC64 select PPC_RTAS select MMIO_NVRAM + select PPC_UDBG_16550 config PPC_OF def_bool y @@ -370,6 +375,10 @@ config MPIC_BROKEN_U3 depends on PPC_MAPLE default y +config PPC_UDBG_16550 + bool + default n + config CELL_IIC depends on PPC_CELL bool diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 6e03b595b6c..0faf95c93ef 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -55,7 +55,7 @@ obj-$(CONFIG_BOOTX_TEXT) += btext.o obj-$(CONFIG_6xx) += idle_6xx.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_KPROBES) += kprobes.o -obj-$(CONFIG_SERIAL_8250) += legacy_serial.o udbg_16550.o +obj-$(CONFIG_PPC_UDBG_16550) += legacy_serial.o udbg_16550.o module-$(CONFIG_PPC64) += module_64.o obj-$(CONFIG_MODULES) += $(module-y) diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index e5d285adb49..db72a92943b 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -299,9 +299,7 @@ void __init setup_arch(char **cmdline_p) if (ppc_md.init_early) ppc_md.init_early(); -#ifdef CONFIG_SERIAL_8250 find_legacy_serial_ports(); -#endif finish_device_tree(); smp_setup_cpu_maps(); diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 81567e93126..c4b76961d6d 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -472,9 +472,7 @@ void __init setup_system(void) * hash table management for us, thus ioremap works. We do that early * so that further code can be debugged */ -#ifdef CONFIG_SERIAL_8250 find_legacy_serial_ports(); -#endif /* * "Finish" the device-tree, that is do the actual parsing of diff --git a/arch/powerpc/platforms/maple/setup.c b/arch/powerpc/platforms/maple/setup.c index dd73e38bfb7..a1cb4d23672 100644 --- a/arch/powerpc/platforms/maple/setup.c +++ b/arch/powerpc/platforms/maple/setup.c @@ -71,9 +71,6 @@ #define DBG(fmt...) #endif -extern void generic_find_legacy_serial_ports(u64 *physport, - unsigned int *default_speed); - static void maple_restart(char *cmd) { unsigned int maple_nvram_base; diff --git a/include/asm-powerpc/serial.h b/include/asm-powerpc/serial.h index 6dc9546d690..3e8589b43cb 100644 --- a/include/asm-powerpc/serial.h +++ b/include/asm-powerpc/serial.h @@ -15,6 +15,10 @@ /* Default baud base if not found in device-tree */ #define BASE_BAUD ( 1843200 / 16 ) +#ifdef CONFIG_PPC_UDBG_16550 extern void find_legacy_serial_ports(void); +#else +#define find_legacy_serial_ports() do { } while (0) +#endif #endif /* _PPC64_SERIAL_H */ -- cgit v1.2.3-70-g09d2 From f8cd32167d96680af19c3ef5fb01d4460be89982 Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Tue, 10 Jan 2006 10:36:14 +1100 Subject: [PATCH] powerpc: remove compat_sys_pciconfig_* Matthew Wilcox wondered why we need these functions. We don't. Remove them and just use the "normal" versions. Signed-off-by: Stephen Rothwell Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/sys_ppc32.c | 24 ------------------------ arch/powerpc/kernel/systbl.S | 6 +++--- 2 files changed, 3 insertions(+), 27 deletions(-) diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c index 9c921d1c408..9b6d965fb13 100644 --- a/arch/powerpc/kernel/sys_ppc32.c +++ b/arch/powerpc/kernel/sys_ppc32.c @@ -552,30 +552,6 @@ asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec return ret; } -asmlinkage int compat_sys_pciconfig_read(u32 bus, u32 dfn, u32 off, u32 len, u32 ubuf) -{ - return sys_pciconfig_read((unsigned long) bus, - (unsigned long) dfn, - (unsigned long) off, - (unsigned long) len, - compat_ptr(ubuf)); -} - -asmlinkage int compat_sys_pciconfig_write(u32 bus, u32 dfn, u32 off, u32 len, u32 ubuf) -{ - return sys_pciconfig_write((unsigned long) bus, - (unsigned long) dfn, - (unsigned long) off, - (unsigned long) len, - compat_ptr(ubuf)); -} - -asmlinkage int compat_sys_pciconfig_iobase(u32 which, u32 in_bus, u32 in_devfn) -{ - return sys_pciconfig_iobase(which, in_bus, in_devfn); -} - - /* Note: it is necessary to treat mode as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) diff --git a/arch/powerpc/kernel/systbl.S b/arch/powerpc/kernel/systbl.S index 65463a1076e..c3ae74b1bf2 100644 --- a/arch/powerpc/kernel/systbl.S +++ b/arch/powerpc/kernel/systbl.S @@ -239,9 +239,9 @@ SYS32ONLY(ftruncate64) SYSX(sys_ni_syscall,sys_stat64,sys_stat64) SYSX(sys_ni_syscall,sys_lstat64,sys_lstat64) SYSX(sys_ni_syscall,sys_fstat64,sys_fstat64) -COMPAT_SYS(pciconfig_read) -COMPAT_SYS(pciconfig_write) -COMPAT_SYS(pciconfig_iobase) +SYSCALL(pciconfig_read) +SYSCALL(pciconfig_write) +SYSCALL(pciconfig_iobase) SYSCALL(ni_syscall) SYSCALL(getdents64) SYSCALL(pivot_root) -- cgit v1.2.3-70-g09d2 From 9d17a5c611a7462a41b06c75f661f4106d380a86 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Tue, 10 Jan 2006 14:50:37 +1100 Subject: [PATCH] powerpc: Extended PCI config space This adds back the call to pci_cfg_space_size() when building the PCI tree from OF nodes that was commented out due to the function not being exported by the PCI code. It's now exported, so let's use it. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/pci_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index fc60a773af7..ba21a6c4f46 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -381,7 +381,7 @@ struct pci_dev *of_create_pci_dev(struct device_node *node, dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0); dev->subsystem_device = get_int_prop(node, "subsystem-id", 0); - dev->cfg_size = 256; /*pci_cfg_space_size(dev);*/ + dev->cfg_size = pci_cfg_space_size(dev); sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus), dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); -- cgit v1.2.3-70-g09d2 From 3b212db9217d02e623eaa12f41c9b5f8c6a99535 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Tue, 10 Jan 2006 05:16:22 +0000 Subject: [PATCH] powerpc: Some ppc compile fixes... This gets most of the Fedora rawhide RPM building again, as long as I disable CHRP. Signed-off-by: Paul Mackerras --- arch/powerpc/Kconfig | 2 +- arch/powerpc/kernel/ppc_ksyms.c | 1 - drivers/ide/pci/via82cxxx.c | 2 +- 3 files changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 17c1b6aa44b..935d9657151 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -412,7 +412,7 @@ config PPC_MPC106 config GENERIC_TBSYNC bool - default y if CONFIG_PPC32 && CONFIG_SMP + default y if PPC32 && SMP default n source "drivers/cpufreq/Kconfig" diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c index b2758148a0d..16d9a904f3c 100644 --- a/arch/powerpc/kernel/ppc_ksyms.c +++ b/arch/powerpc/kernel/ppc_ksyms.c @@ -244,7 +244,6 @@ EXPORT_SYMBOL(set_context); extern long mol_trampoline; EXPORT_SYMBOL(mol_trampoline); /* For MOL */ EXPORT_SYMBOL(flush_hash_pages); /* For MOL */ -EXPORT_SYMBOL_GPL(__handle_mm_fault); /* For MOL */ #ifdef CONFIG_SMP extern int mmu_hash_lock; EXPORT_SYMBOL(mmu_hash_lock); /* For MOL */ diff --git a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c index 86fb1e0286d..c85b87cb59d 100644 --- a/drivers/ide/pci/via82cxxx.c +++ b/drivers/ide/pci/via82cxxx.c @@ -439,7 +439,7 @@ static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif) hwif->speedproc = &via_set_drive; -#if defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_PPC32) +#if defined(CONFIG_PPC_CHRP) && defined(CONFIG_PPC32) if(_machine == _MACH_chrp && _chrp_type == _CHRP_Pegasos) { hwif->irq = hwif->channel ? 15 : 14; } -- cgit v1.2.3-70-g09d2