litmus-rt.git - The LITMUS^RT kernel.

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author	Dmitry Torokhov <dtor@insightbb.com>	2007-05-08 01:31:11 -0400
committer	Dmitry Torokhov <dtor@insightbb.com>	2007-05-08 01:31:11 -0400
commit	334d0dd8b660557608142f0f77abc6812b48f08b (patch)
tree	9393a9aa099d7d42deda5f9f5054796c0c769be7 /drivers/net/Space.c
parent	3f07d8796262f6aee135c8dd9a91210da9f888e4 (diff)
parent	5b94f675f57e4ff16c8fda09088d7480a84dcd91 (diff)

Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

Diffstat (limited to 'drivers/net/Space.c')

-rw-r--r--

drivers/net/Space.c

1 files changed, 0 insertions, 4 deletions

 extern struct net_device *mvme147lance_probe(int unit);
 extern struct net_device *tc515_probe(int unit);
 extern struct net_device *lance_probe(int unit);
-extern struct net_device *mace_probe(int unit);
 extern struct net_device *mac8390_probe(int unit);
 extern struct net_device *mac89x0_probe(int unit);
 extern struct net_device *mc32_probe(int unit);
 #ifdef CONFIG_MVME147_NET       /* MVME147 internal Ethernet */
         {mvme147lance_probe, 0},
 #endif
-#ifdef CONFIG_MACMACE           /* Mac 68k Quadra AV builtin Ethernet */
-        {mace_probe, 0},
-#endif
 #ifdef CONFIG_MAC8390           /* NuBus NS8390-based cards */
         {mac8390_probe, 0},
 #endif

/* * ACPI PCI HotPlug glue functions to ACPI CA subsystem * * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com) * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com) * Copyright (C) 2002,2003 NEC Corporation * * 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 <t-kochi@bq.jp.nec.com> * */ #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/pci.h> #include <linux/smp_lock.h> #include <asm/semaphore.h> #include "../pci.h" #include "pci_hotplug.h" #include "acpiphp.h" static LIST_HEAD(bridge_list); #define MY_NAME "acpiphp_glue" static void handle_hotplug_event_bridge (acpi_handle, u32, void *); static void handle_hotplug_event_func (acpi_handle, u32, void *); /* * initialization & terminatation routines */ /** * is_ejectable - determine if a slot is ejectable * @handle: handle to acpi namespace * * Ejectable slot should satisfy at least these conditions: * * 1. has _ADR method * 2. has _EJ0 method * * optionally * * 1. has _STA method * 2. has _PS0 method * 3. has _PS3 method * 4. .. * */ static int is_ejectable(acpi_handle handle) { acpi_status status; acpi_handle tmp; status = acpi_get_handle(handle, "_ADR", &tmp); if (ACPI_FAILURE(status)) { return 0; } status = acpi_get_handle(handle, "_EJ0", &tmp); if (ACPI_FAILURE(status)) { return 0; } return 1; } /* callback routine to check the existence of ejectable slots */ static acpi_status is_ejectable_slot(acpi_handle handle, u32 lvl, void *context, void **rv) { int *count = (int *)context; if (is_ejectable(handle)) { (*count)++; /* only one ejectable slot is enough */ return AE_CTRL_TERMINATE; } else { return AE_OK; } } /* callback routine to register each ACPI PCI slot object */ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) { struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; struct acpiphp_slot *slot; struct acpiphp_func *newfunc; acpi_handle tmp; acpi_status status = AE_OK; unsigned long adr, sun; int device, function; static int num_slots = 0; /* XXX if we support I/O node hotplug... */ status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); if (ACPI_FAILURE(status)) return AE_OK; status = acpi_get_handle(handle, "_EJ0", &tmp); if (ACPI_FAILURE(status)) return AE_OK; device = (adr >> 16) & 0xffff; function = adr & 0xffff; newfunc = kmalloc(sizeof(struct acpiphp_func), GFP_KERNEL); if (!newfunc) return AE_NO_MEMORY; memset(newfunc, 0, sizeof(struct acpiphp_func)); INIT_LIST_HEAD(&newfunc->sibling); newfunc->handle = handle; newfunc->function = function; newfunc->flags = FUNC_HAS_EJ0; if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) newfunc->flags |= FUNC_HAS_STA; if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) newfunc->flags |= FUNC_HAS_PS0; if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) newfunc->flags |= FUNC_HAS_PS3; status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); if (ACPI_FAILURE(status)) sun = -1; /* search for objects that share the same slot */ for (slot = bridge->slots; slot; slot = slot->next) if (slot->device == device) { if (slot->sun != sun) warn("sibling found, but _SUN doesn't match!\n"); break; } if (!slot) { slot = kmalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); if (!slot) { kfree(newfunc); return AE_NO_MEMORY; } memset(slot, 0, sizeof(struct acpiphp_slot)); slot->bridge = bridge; slot->id = num_slots++; slot->device = device; slot->sun = sun; INIT_LIST_HEAD(&slot->funcs); init_MUTEX(&slot->crit_sect); slot->next = bridge->slots; bridge->slots = slot; bridge->nr_slots++; dbg("found ACPI PCI Hotplug slot at PCI %02x:%02x Slot:%d\n", slot->bridge->bus, slot->device, slot->sun); } newfunc->slot = slot; list_add_tail(&newfunc->sibling, &slot->funcs); /* associate corresponding pci_dev */ newfunc->pci_dev = pci_find_slot(bridge->bus, PCI_DEVFN(device, function)); if (newfunc->pci_dev) { if (acpiphp_init_func_resource(newfunc) < 0) { kfree(newfunc); return AE_ERROR; } slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); } /* install notify handler */ status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, handle_hotplug_event_func, newfunc); if (ACPI_FAILURE(status)) { err("failed to register interrupt notify handler\n"); return status; } return AE_OK; } /* see if it's worth looking at this bridge */ static int detect_ejectable_slots(acpi_handle *bridge_handle) { acpi_status status; int count; count = 0; /* only check slots defined directly below bridge object */ status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1, is_ejectable_slot, (void *)&count, NULL); return count; } /* decode ACPI _CRS data and convert into our internal resource list * TBD: _TRA, etc. */ static acpi_status decode_acpi_resource(struct acpi_resource *resource, void *context) { struct acpiphp_bridge *bridge = (struct acpiphp_bridge *) context; struct acpi_resource_address64 address; struct pci_resource *res; if (resource->id != ACPI_RSTYPE_ADDRESS16 && resource->id != ACPI_RSTYPE_ADDRESS32 && resource->id != ACPI_RSTYPE_ADDRESS64) return AE_OK; acpi_resource_to_address64(resource, &address); if (address.producer_consumer == ACPI_PRODUCER && address.address_length > 0) { dbg("resource type: %d: 0x%llx - 0x%llx\n", address.resource_type, (unsigned long long)address.min_address_range, (unsigned long long)address.max_address_range); res = acpiphp_make_resource(address.min_address_range, address.address_length); if (!res) { err("out of memory\n"); return AE_OK; } switch (address.resource_type) { case ACPI_MEMORY_RANGE: if (address.attribute.memory.cache_attribute == ACPI_PREFETCHABLE_MEMORY) { res->next = bridge->p_mem_head; bridge->p_mem_head = res; } else { res->next = bridge->mem_head; bridge->mem_head = res; } break; case ACPI_IO_RANGE: res->next = bridge->io_head; bridge->io_head = res; break; case ACPI_BUS_NUMBER_RANGE: res->next = bridge->bus_head; bridge->bus_head = res; break; default: /* invalid type */ kfree(res); break; } } return AE_OK; } /* decode ACPI 2.0 _HPP hot plug parameters */ static void decode_hpp(struct acpiphp_bridge *bridge) { acpi_status status; struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER, .pointer = NULL}; union acpi_object *package; int i; /* default numbers */ bridge->hpp.cache_line_size = 0x10; bridge->hpp.latency_timer = 0x40; bridge->hpp.enable_SERR = 0; bridge->hpp.enable_PERR = 0; status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer); if (ACPI_FAILURE(status)) { dbg("_HPP evaluation failed\n"); return; } package = (union acpi_object *) buffer.pointer; if (!package || package->type != ACPI_TYPE_PACKAGE || package->package.count != 4 || !package->package.elements) { err("invalid _HPP object; ignoring\n"); goto err_exit; } for (i = 0; i < 4; i++) { if (package->package.elements[i].type != ACPI_TYPE_INTEGER) { err("invalid _HPP parameter type; ignoring\n"); goto err_exit; } } bridge->hpp.cache_line_size = package->package.elements[0].integer.value; bridge->hpp.latency_timer = package->package.elements[1].integer.value; bridge->hpp.enable_SERR = package->package.elements[2].integer.value; bridge->hpp.enable_PERR = package->package.elements[3].integer.value; dbg("_HPP parameter = (%02x, %02x, %02x, %02x)\n", bridge->hpp.cache_line_size, bridge->hpp.latency_timer, bridge->hpp.enable_SERR, bridge->hpp.enable_PERR); bridge->flags |= BRIDGE_HAS_HPP; err_exit: kfree(buffer.pointer); } /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ static void init_bridge_misc(struct acpiphp_bridge *bridge) { acpi_status status; /* decode ACPI 2.0 _HPP (hot plug parameters) */ decode_hpp(bridge); /* subtract all resources already allocated */ acpiphp_detect_pci_resource(bridge); /* register all slot objects under this bridge */ status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, register_slot, bridge, NULL); /* install notify handler */ status = acpi_install_notify_handler(bridge->handle, ACPI_SYSTEM_NOTIFY, handle_hotplug_event_bridge, bridge); if (ACPI_FAILURE(status)) { err("failed to register interrupt notify handler\n"); } list_add(&bridge->list, &bridge_list); dbg("Bridge resource:\n"); acpiphp_dump_resource(bridge); } /* allocate and initialize host bridge data structure */ static void add_host_bridge(acpi_handle *handle, int seg, int bus) { acpi_status status; struct acpiphp_bridge *bridge; bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); if (bridge == NULL) return; memset(bridge, 0, sizeof(struct acpiphp_bridge)); bridge->type = BRIDGE_TYPE_HOST; bridge->handle = handle; bridge->seg = seg; bridge->bus = bus; bridge->pci_bus = pci_find_bus(seg, bus); spin_lock_init(&bridge->res_lock); /* to be overridden when we decode _CRS */ bridge->sub = bridge->bus; /* decode resources */ status = acpi_walk_resources(handle, METHOD_NAME__CRS, decode_acpi_resource, bridge); if (ACPI_FAILURE(status)) { err("failed to decode bridge resources\n"); kfree(bridge); return; } acpiphp_resource_sort_and_combine(&bridge->io_head); acpiphp_resource_sort_and_combine(&bridge->mem_head); acpiphp_resource_sort_and_combine(&bridge->p_mem_head); acpiphp_resource_sort_and_combine(&bridge->bus_head); dbg("ACPI _CRS resource:\n"); acpiphp_dump_resource(bridge); if (bridge->bus_head) { bridge->bus = bridge->bus_head->base; bridge->sub = bridge->bus_head->base + bridge->bus_head->length - 1; } init_bridge_misc(bridge); } /* allocate and initialize PCI-to-PCI bridge data structure */ static void add_p2p_bridge(acpi_handle *handle, int seg, int bus, int dev, int fn) { struct acpiphp_bridge *bridge; u8 tmp8; u16 tmp16; u64 base64, limit64; u32 base, limit, base32u, limit32u; bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); if (bridge == NULL) { err("out of memory\n"); return; } memset(bridge, 0, sizeof(struct acpiphp_bridge)); bridge->type = BRIDGE_TYPE_P2P; bridge->handle = handle; bridge->seg = seg; bridge->pci_dev = pci_find_slot(bus, PCI_DEVFN(dev, fn)); if (!bridge->pci_dev) { err("Can't get pci_dev\n"); kfree(bridge); return; } bridge->pci_bus = bridge->pci_dev->subordinate; if (!bridge->pci_bus) { err("This is not a PCI-to-PCI bridge!\n"); kfree(bridge); return; } spin_lock_init(&bridge->res_lock); bridge->bus = bridge->pci_bus->number; bridge->sub = bridge->pci_bus->subordinate; /* * decode resources under this P2P bridge */ /* I/O resources */ pci_read_config_byte(bridge->pci_dev, PCI_IO_BASE, &tmp8); base = tmp8; pci_read_config_byte(bridge->pci_dev, PCI_IO_LIMIT, &tmp8); limit = tmp8; switch (base & PCI_IO_RANGE_TYPE_MASK) { case PCI_IO_RANGE_TYPE_16: base = (base << 8) & 0xf000; limit = ((limit << 8) & 0xf000) + 0xfff; bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1); if (!bridge->io_head) { err("out of memory\n"); kfree(bridge); return; } dbg("16bit I/O range: %04x-%04x\n", (u32)bridge->io_head->base, (u32)(bridge->io_head->base + bridge->io_head->length - 1)); break; case PCI_IO_RANGE_TYPE_32: pci_read_config_word(bridge->pci_dev, PCI_IO_BASE_UPPER16, &tmp16); base = ((u32)tmp16 << 16) | ((base << 8) & 0xf000); pci_read_config_word(bridge->pci_dev, PCI_IO_LIMIT_UPPER16, &tmp16); limit = (((u32)tmp16 << 16) | ((limit << 8) & 0xf000)) + 0xfff; bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1); if (!bridge->io_head) { err("out of memory\n"); kfree(bridge); return; } dbg("32bit I/O range: %08x-%08x\n", (u32)bridge->io_head->base, (u32)(bridge->io_head->base + bridge->io_head->length - 1)); break; case 0x0f: dbg("I/O space unsupported\n"); break; default: warn("Unknown I/O range type\n"); } /* Memory resources (mandatory for P2P bridge) */ pci_read_config_word(bridge->pci_dev, PCI_MEMORY_BASE, &tmp16); base = (tmp16 & 0xfff0) << 16; pci_read_config_word(bridge->pci_dev, PCI_MEMORY_LIMIT, &tmp16); limit = ((tmp16 & 0xfff0) << 16) | 0xfffff; bridge->mem_head = acpiphp_make_resource((u64)base, limit - base + 1); if (!bridge->mem_head) { err("out of memory\n"); kfree(bridge); return; } dbg("32bit Memory range: %08x-%08x\n", (u32)bridge->mem_head->base, (u32)(bridge->mem_head->base + bridge->mem_head->length-1)); /* Prefetchable Memory resources (optional) */ pci_read_config_word(bridge->pci_dev, PCI_PREF_MEMORY_BASE, &tmp16); base = tmp16; pci_read_config_word(bridge->pci_dev, PCI_PREF_MEMORY_LIMIT, &tmp16); limit = tmp16; switch (base & PCI_MEMORY_RANGE_TYPE_MASK) { case PCI_PREF_RANGE_TYPE_32: base = (base & 0xfff0) << 16; limit = ((limit & 0xfff0) << 16) | 0xfffff; bridge->p_mem_head = acpiphp_make_resource((u64)base, limit - base + 1); if (!bridge->p_mem_head) { err("out of memory\n"); kfree(bridge); return; } dbg("32bit Prefetchable memory range: %08x-%08x\n", (u32)bridge->p_mem_head->base, (u32)(bridge->p_mem_head->base + bridge->p_mem_head->length - 1)); break; case PCI_PREF_RANGE_TYPE_64: pci_read_config_dword(bridge->pci_dev, PCI_PREF_BASE_UPPER32, &base32u); pci_read_config_dword(bridge->pci_dev, PCI_PREF_LIMIT_UPPER32, &limit32u); base64 = ((u64)base32u << 32) | ((base & 0xfff0) << 16); limit64 = (((u64)limit32u << 32) | ((limit & 0xfff0) << 16)) + 0xfffff; bridge->p_mem_head = acpiphp_make_resource(base64, limit64 - base64 + 1); if (!bridge->p_mem_head) { err("out of memory\n"); kfree(bridge); return; } dbg("64bit Prefetchable memory range: %08x%08x-%08x%08x\n", (u32)(bridge->p_mem_head->base >> 32), (u32)(bridge->p_mem_head->base & 0xffffffff), (u32)((bridge->p_mem_head->base + bridge->p_mem_head->length - 1) >> 32), (u32)((bridge->p_mem_head->base + bridge->p_mem_head->length - 1) & 0xffffffff)); break; case 0x0f: break; default: warn("Unknown prefetchale memory type\n"); } init_bridge_misc(bridge); } /* callback routine to find P2P bridges */ static acpi_status find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) { acpi_status status; acpi_handle dummy_handle; unsigned long *segbus = context; unsigned long tmp; int seg, bus, device, function; struct pci_dev *dev; /* get PCI address */ seg = (*segbus >> 8) & 0xff; bus = *segbus & 0xff; status = acpi_get_handle(handle, "_ADR", &dummy_handle); if (ACPI_FAILURE(status)) return AE_OK; /* continue */ status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp); if (ACPI_FAILURE(status)) { dbg("%s: _ADR evaluation failure\n", __FUNCTION__); return AE_OK; } device = (tmp >> 16) & 0xffff; function = tmp & 0xffff; dev = pci_find_slot(bus, PCI_DEVFN(device, function)); if (!dev) return AE_OK; if (!dev->subordinate) return AE_OK; /* check if this bridge has ejectable slots */ if (detect_ejectable_slots(handle) > 0) { dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); add_p2p_bridge(handle, seg, bus, device, function); } return AE_OK; } /* find hot-pluggable slots, and then find P2P bridge */ static int add_bridge(acpi_handle handle) { acpi_status status; unsigned long tmp; int seg, bus; acpi_handle dummy_handle; /* if the bridge doesn't have _STA, we assume it is always there */ status = acpi_get_handle(handle, "_STA", &dummy_handle); if (ACPI_SUCCESS(status)) { status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); if (ACPI_FAILURE(status)) { dbg("%s: _STA evaluation failure\n", __FUNCTION__); return 0; } if ((tmp & ACPI_STA_FUNCTIONING) == 0) /* don't register this object */ return 0; } /* get PCI segment number */ status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp); seg = ACPI_SUCCESS(status) ? tmp : 0; /* get PCI bus number */ status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp); if (ACPI_SUCCESS(status)) { bus = tmp; } else { warn("can't get bus number, assuming 0\n"); bus = 0; } /* check if this bridge has ejectable slots */ if (detect_ejectable_slots(handle) > 0) { dbg("found PCI host-bus bridge with hot-pluggable slots\n"); add_host_bridge(handle, seg, bus); return 0; } tmp = seg << 8 | bus; /* search P2P bridges under this host bridge */ status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, find_p2p_bridge, &tmp, NULL); if (ACPI_FAILURE(status)) warn("find_p2p_bridge faied (error code = 0x%x)\n",status); return 0; } static void remove_bridge(acpi_handle handle) { /* No-op for now .. */ } static int power_on_slot(struct acpiphp_slot *slot) { acpi_status status; struct acpiphp_func *func; struct list_head *l; int retval = 0; /* if already enabled, just skip */ if (slot->flags & SLOT_POWEREDON) goto err_exit; list_for_each (l, &slot->funcs) { func = list_entry(l, struct acpiphp_func, sibling); if (func->flags & FUNC_HAS_PS0) { dbg("%s: executing _PS0\n", __FUNCTION__); status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); if (ACPI_FAILURE(status)) { warn("%s: _PS0 failed\n", __FUNCTION__); retval = -1; goto err_exit; } else break; } } /* TBD: evaluate _STA to check if the slot is enabled */ slot->flags |= SLOT_POWEREDON; err_exit: return retval; } static int power_off_slot(struct acpiphp_slot *slot) { acpi_status status; struct acpiphp_func *func; struct list_head *l; struct acpi_object_list arg_list; union acpi_object arg; int retval = 0; /* if already disabled, just skip */ if ((slot->flags & SLOT_POWEREDON) == 0) goto err_exit; list_for_each (l, &slot->funcs) { func = list_entry(l, struct acpiphp_func, sibling); if (func->pci_dev && (func->flags & FUNC_HAS_PS3)) { status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); if (ACPI_FAILURE(status)) { warn("%s: _PS3 failed\n", __FUNCTION__); retval = -1; goto err_exit; } else break; } } list_for_each (l, &slot->funcs) { func = list_entry(l, struct acpiphp_func, sibling); /* We don't want to call _EJ0 on non-existing functions. */ if (func->pci_dev && (func->flags & FUNC_HAS_EJ0)) { /* _EJ0 method take one argument */ arg_list.count = 1; arg_list.pointer = &arg; arg.type = ACPI_TYPE_INTEGER; arg.integer.value = 1; status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); if (ACPI_FAILURE(status)) { warn("%s: _EJ0 failed\n", __FUNCTION__); retval = -1; goto err_exit; } else break; } } /* TBD: evaluate _STA to check if the slot is disabled */ slot->flags &= (~SLOT_POWEREDON); err_exit: return retval; } /** * enable_device - enable, configure a slot * @slot: slot to be enabled * * This function should be called per *physical slot*, * not per each slot object in ACPI namespace. * */ static int enable_device(struct acpiphp_slot *slot) { u8 bus; struct pci_dev *dev; struct pci_bus *child; struct list_head *l; struct acpiphp_func *func; int retval = 0; int num; if (slot->flags & SLOT_ENABLED) goto err_exit; /* sanity check: dev should be NULL when hot-plugged in */ dev = pci_find_slot(slot->bridge->bus, PCI_DEVFN(slot->device, 0)); if (dev) { /* This case shouldn't happen */ err("pci_dev structure already exists.\n"); retval = -1; goto err_exit; } /* allocate resources to device */ retval = acpiphp_configure_slot(slot); if (retval) goto err_exit; /* returned `dev' is the *first function* only! */ num = pci_scan_slot(slot->bridge->pci_bus, PCI_DEVFN(slot->device, 0)); if (num) pci_bus_add_devices(slot->bridge->pci_bus); dev = pci_find_slot(slot->bridge->bus, PCI_DEVFN(slot->device, 0)); if (!dev) { err("No new device found\n"); retval = -1; goto err_exit; } if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { pci_read_config_byte(dev, PCI_SECONDARY_BUS, &bus); child = (struct pci_bus*) pci_add_new_bus(dev->bus, dev, bus); pci_do_scan_bus(child); } /* associate pci_dev to our representation */ list_for_each (l, &slot->funcs) { func = list_entry(l, struct acpiphp_func, sibling); func->pci_dev = pci_find_slot(slot->bridge->bus, PCI_DEVFN(slot->device, func->function)); if (!func->pci_dev) continue; /* configure device */ retval = acpiphp_configure_function(func); if (retval) goto err_exit; } slot->flags |= SLOT_ENABLED; dbg("Available resources:\n"); acpiphp_dump_resource(slot->bridge); err_exit: return retval; } /** * disable_device - disable a slot */ static int disable_device(struct acpiphp_slot *slot) { int retval = 0; struct acpiphp_func *func; struct list_head *l; /* is this slot already disabled? */ if (!(slot->flags & SLOT_ENABLED)) goto err_exit; list_for_each (l, &slot->funcs) { func = list_entry(l, struct acpiphp_func, sibling); if (func->pci_dev) acpiphp_unconfigure_function(func); } slot->flags &= (~SLOT_ENABLED); err_exit: return retval; } /** * get_slot_status - get ACPI slot status * * if a slot has _STA for each function and if any one of them * returned non-zero status, return it * * if a slot doesn't have _STA and if any one of its functions' * configuration space is configured, return 0x0f as a _STA * * otherwise return 0 */ static unsigned int get_slot_status(struct acpiphp_slot *slot) { acpi_status status; unsigned long sta = 0; u32 dvid; struct list_head *l; struct acpiphp_func *func; list_for_each (l, &slot->funcs) { func = list_entry(l, struct acpiphp_func, sibling); if (func->flags & FUNC_HAS_STA) { status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); if (ACPI_SUCCESS(status) && sta) break; } else { pci_bus_read_config_dword(slot->bridge->pci_bus, PCI_DEVFN(slot->device, func->function), PCI_VENDOR_ID, &dvid); if (dvid != 0xffffffff) { sta = ACPI_STA_ALL; break; } } } return (unsigned int)sta; } /** * acpiphp_check_bridge - re-enumerate devices * * Iterate over all slots under this bridge and make sure that if a * card is present they are enabled, and if not they are disabled. */ static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) { struct acpiphp_slot *slot; int retval = 0; int enabled, disabled; enabled = disabled = 0; for (slot = bridge->slots; slot; slot = slot->next) { unsigned int status = get_slot_status(slot); if (slot->flags & SLOT_ENABLED) { if (status == ACPI_STA_ALL) continue; retval = acpiphp_disable_slot(slot); if (retval) { err("Error occurred in disabling\n"); goto err_exit; } disabled++; } else { if (status != ACPI_STA_ALL) continue; retval = acpiphp_enable_slot(slot); if (retval) { err("Error occurred in enabling\n"); goto err_exit; } enabled++; } } dbg("%s: %d enabled, %d disabled\n", __FUNCTION__, enabled, disabled); err_exit: return retval; } /* * ACPI event handlers */ /** * handle_hotplug_event_bridge - handle ACPI event on bridges * * @handle: Notify()'ed acpi_handle * @type: Notify code * @context: pointer to acpiphp_bridge structure * * handles ACPI event notification on {host,p2p} bridges * */ static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) { struct acpiphp_bridge *bridge; char objname[64]; struct acpi_buffer buffer = { .length = sizeof(objname), .pointer = objname }; bridge = (struct acpiphp_bridge *)context; acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); switch (type) { case ACPI_NOTIFY_BUS_CHECK: /* bus re-enumerate */ dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); acpiphp_check_bridge(bridge); break; case ACPI_NOTIFY_DEVICE_CHECK: /* device check */ dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); acpiphp_check_bridge(bridge); break; case ACPI_NOTIFY_DEVICE_WAKE: /* wake event */ dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); break; case ACPI_NOTIFY_EJECT_REQUEST: /* request device eject */ dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); break; case ACPI_NOTIFY_FREQUENCY_MISMATCH: printk(KERN_ERR "Device %s cannot be configured due" " to a frequency mismatch\n", objname); break; case ACPI_NOTIFY_BUS_MODE_MISMATCH: printk(KERN_ERR "Device %s cannot be configured due" " to a bus mode mismatch\n", objname); break; case ACPI_NOTIFY_POWER_FAULT: printk(KERN_ERR "Device %s has suffered a power fault\n", objname); break; default: warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); break; } } /** * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) * * @handle: Notify()'ed acpi_handle * @type: Notify code * @context: pointer to acpiphp_func structure * * handles ACPI event notification on slots * */ static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) { struct acpiphp_func *func; char objname[64]; struct acpi_buffer buffer = { .length = sizeof(objname), .pointer = objname }; acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); func = (struct acpiphp_func *)context; switch (type) { case ACPI_NOTIFY_BUS_CHECK: /* bus re-enumerate */ dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); acpiphp_enable_slot(func->slot); break; case ACPI_NOTIFY_DEVICE_CHECK: /* device check : re-enumerate from parent bus */ dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); acpiphp_check_bridge(func->slot->bridge); break; case ACPI_NOTIFY_DEVICE_WAKE: /* wake event */ dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); break; case ACPI_NOTIFY_EJECT_REQUEST: /* request device eject */ dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); acpiphp_disable_slot(func->slot); break; default: warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); break; } } static struct acpi_pci_driver acpi_pci_hp_driver = { .add = add_bridge, .remove = remove_bridge, }; /** * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures * */ int __init acpiphp_glue_init(void) { int num; if (list_empty(&pci_root_buses)) return -1; num = acpi_pci_register_driver(&acpi_pci_hp_driver); if (num <= 0) return -1; return 0; } /** * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures * * This function frees all data allocated in acpiphp_glue_init() */ void __exit acpiphp_glue_exit(void) { struct list_head *l1, *l2, *n1, *n2; struct acpiphp_bridge *bridge; struct acpiphp_slot *slot, *next; struct acpiphp_func *func; acpi_status status; list_for_each_safe (l1, n1, &bridge_list) { bridge = (struct acpiphp_bridge *)l1; slot = bridge->slots; while (slot) { next = slot->next; list_for_each_safe (l2, n2, &slot->funcs) { func = list_entry(l2, struct acpiphp_func, sibling); acpiphp_free_resource(&func->io_head); acpiphp_free_resource(&func->mem_head); acpiphp_free_resource(&func->p_mem_head); acpiphp_free_resource(&func->bus_head); status = acpi_remove_notify_handler(func->handle, ACPI_SYSTEM_NOTIFY, handle_hotplug_event_func); if (ACPI_FAILURE(status)) err("failed to remove notify handler\n"); kfree(func); } kfree(slot); slot = next; } status = acpi_remove_notify_handler(bridge->handle, ACPI_SYSTEM_NOTIFY, handle_hotplug_event_bridge); if (ACPI_FAILURE(status)) err("failed to remove notify handler\n"); acpiphp_free_resource(&bridge->io_head); acpiphp_free_resource(&bridge->mem_head); acpiphp_free_resource(&bridge->p_mem_head); acpiphp_free_resource(&bridge->bus_head); kfree(bridge); } acpi_pci_unregister_driver(&acpi_pci_hp_driver); } /** * acpiphp_get_num_slots - count number of slots in a system */ int __init acpiphp_get_num_slots(void) { struct list_head *node; struct acpiphp_bridge *bridge; int num_slots; num_slots = 0; list_for_each (node, &bridge_list) { bridge = (struct acpiphp_bridge *)node; dbg("Bus%d %dslot(s)\n", bridge->bus, bridge->nr_slots); num_slots += bridge->nr_slots; } dbg("Total %dslots\n", num_slots); return num_slots; } #if 0 /** * acpiphp_for_each_slot - call function for each slot * @fn: callback function * @data: context to be passed to callback function * */ static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) { struct list_head *node; struct acpiphp_bridge *bridge; struct acpiphp_slot *slot; int retval = 0; list_for_each (node, &bridge_list) { bridge = (struct acpiphp_bridge *)node; for (slot = bridge->slots; slot; slot = slot->next) { retval = fn(slot, data); if (!retval) goto err_exit; } } err_exit: return retval; } #endif /* search matching slot from id */ struct acpiphp_slot *get_slot_from_id(int id) { struct list_head *node; struct acpiphp_bridge *bridge; struct acpiphp_slot *slot; list_for_each (node, &bridge_list) { bridge = (struct acpiphp_bridge *)node; for (slot = bridge->slots; slot; slot = slot->next) if (slot->id == id) return slot; } /* should never happen! */ err("%s: no object for id %d\n", __FUNCTION__, id); WARN_ON(1); return NULL; } /** * acpiphp_enable_slot - power on slot */ int acpiphp_enable_slot(struct acpiphp_slot *slot) { int retval; down(&slot->crit_sect); /* wake up all functions */ retval = power_on_slot(slot); if (retval) goto err_exit; if (get_slot_status(slot) == ACPI_STA_ALL) /* configure all functions */ retval = enable_device(slot); err_exit: up(&slot->crit_sect); return retval; } /** * acpiphp_disable_slot - power off slot */ int acpiphp_disable_slot(struct acpiphp_slot *slot) { int retval = 0; down(&slot->crit_sect); /* unconfigure all functions */ retval = disable_device(slot); if (retval) goto err_exit; /* power off all functions */ retval = power_off_slot(slot); if (retval) goto err_exit; acpiphp_resource_sort_and_combine(&slot->bridge->io_head); acpiphp_resource_sort_and_combine(&slot->bridge->mem_head); acpiphp_resource_sort_and_combine(&slot->bridge->p_mem_head); acpiphp_resource_sort_and_combine(&slot->bridge->bus_head); dbg("Available resources:\n"); acpiphp_dump_resource(slot->bridge); err_exit: up(&slot->crit_sect); return retval; } /* * slot enabled: 1 * slot disabled: 0 */ u8 acpiphp_get_power_status(struct acpiphp_slot *slot) { unsigned int sta; sta = get_slot_status(slot); return (sta & ACPI_STA_ENABLED) ? 1 : 0; } /* * latch closed: 1 * latch open: 0 */ u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) { unsigned int sta; sta = get_slot_status(slot); return (sta & ACPI_STA_SHOW_IN_UI) ? 1 : 0; } /* * adapter presence : 1 * absence : 0 */ u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) { unsigned int sta; sta = get_slot_status(slot); return (sta == 0) ? 0 : 1; } /* * pci address (seg/bus/dev) */


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