[PATCH] acpi hotplug: convert acpiphp to use generic resource code
This patch converts acpiphp to use the generic PCI resource assignment code.
It's quite large, but most of it is deleting the acpiphp_pci and acpiphp_res
files. It's tested on an hp Integrity rx8620 (which won't work without this
patch). Testers with other hardware welcomed.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index e7f4129..41c3eb2 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -4,6 +4,8 @@
* 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
+ * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
+ * Copyright (C) 2003-2005 Hewlett Packard
*
* All rights reserved.
*
@@ -26,6 +28,16 @@
*
*/
+/*
+ * Lifetime rules for pci_dev:
+ * - The one in acpiphp_func has its refcount elevated by pci_get_slot()
+ * when the driver is loaded or when an insertion event occurs. It loses
+ * a refcount when its ejected or the driver unloads.
+ * - The one in acpiphp_bridge has its refcount elevated by pci_get_slot()
+ * when the bridge is scanned and it loses a refcount when the bridge
+ * is removed.
+ */
+
#include <linux/init.h>
#include <linux/module.h>
@@ -178,21 +190,18 @@
bridge->nr_slots++;
- dbg("found ACPI PCI Hotplug slot at PCI %02x:%02x Slot:%d\n",
- slot->bridge->bus, slot->device, slot->sun);
+ dbg("found ACPI PCI Hotplug slot %d at PCI %04x:%02x:%02x\n",
+ slot->sun, pci_domain_nr(bridge->pci_bus),
+ bridge->pci_bus->number, slot->device);
}
newfunc->slot = slot;
list_add_tail(&newfunc->sibling, &slot->funcs);
/* associate corresponding pci_dev */
- newfunc->pci_dev = pci_find_slot(bridge->bus,
+ newfunc->pci_dev = pci_get_slot(bridge->pci_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);
}
@@ -227,62 +236,6 @@
}
-/* 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)
{
@@ -346,9 +299,6 @@
/* 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);
@@ -364,16 +314,12 @@
}
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)
+static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus)
{
- acpi_status status;
struct acpiphp_bridge *bridge;
bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
@@ -384,52 +330,19 @@
bridge->type = BRIDGE_TYPE_HOST;
bridge->handle = handle;
- bridge->seg = seg;
- bridge->bus = bus;
- bridge->pci_bus = pci_find_bus(seg, bus);
+ bridge->pci_bus = pci_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)
+static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev)
{
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) {
@@ -441,133 +354,22 @@
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;
+ bridge->pci_dev = pci_dev_get(pci_dev);
+ bridge->pci_bus = pci_dev->subordinate;
if (!bridge->pci_bus) {
err("This is not a PCI-to-PCI bridge!\n");
- kfree(bridge);
- return;
+ goto err;
}
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);
+ return;
+ err:
+ pci_dev_put(pci_dev);
+ kfree(bridge);
+ return;
}
@@ -577,14 +379,10 @@
{
acpi_status status;
acpi_handle dummy_handle;
- unsigned long *segbus = context;
unsigned long tmp;
- int seg, bus, device, function;
+ int device, function;
struct pci_dev *dev;
-
- /* get PCI address */
- seg = (*segbus >> 8) & 0xff;
- bus = *segbus & 0xff;
+ struct pci_bus *pci_bus = context;
status = acpi_get_handle(handle, "_ADR", &dummy_handle);
if (ACPI_FAILURE(status))
@@ -599,20 +397,19 @@
device = (tmp >> 16) & 0xffff;
function = tmp & 0xffff;
- dev = pci_find_slot(bus, PCI_DEVFN(device, function));
+ dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function));
- if (!dev)
- return AE_OK;
-
- if (!dev->subordinate)
- return AE_OK;
+ if (!dev || !dev->subordinate)
+ goto out;
/* 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);
+ add_p2p_bridge(handle, dev);
}
+ out:
+ pci_dev_put(dev);
return AE_OK;
}
@@ -624,6 +421,7 @@
unsigned long tmp;
int seg, bus;
acpi_handle dummy_handle;
+ struct pci_bus *pci_bus;
/* if the bridge doesn't have _STA, we assume it is always there */
status = acpi_get_handle(handle, "_STA", &dummy_handle);
@@ -653,18 +451,22 @@
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);
+ pci_bus = pci_find_bus(seg, bus);
+ if (!pci_bus) {
+ err("Can't find bus %04x:%02x\n", seg, bus);
return 0;
}
- tmp = seg << 8 | bus;
+ /* 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, pci_bus);
+ return 0;
+ }
/* search P2P bridges under this host bridge */
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
- find_p2p_bridge, &tmp, NULL);
+ find_p2p_bridge, pci_bus, NULL);
if (ACPI_FAILURE(status))
warn("find_p2p_bridge faied (error code = 0x%x)\n",status);
@@ -672,10 +474,59 @@
return 0;
}
+static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
+{
+ struct list_head *head;
+ list_for_each(head, &bridge_list) {
+ struct acpiphp_bridge *bridge = list_entry(head,
+ struct acpiphp_bridge, list);
+ if (bridge->handle == handle)
+ return bridge;
+ }
+
+ return NULL;
+}
static void remove_bridge(acpi_handle handle)
{
- /* No-op for now .. */
+ struct list_head *list, *tmp;
+ struct acpiphp_bridge *bridge;
+ struct acpiphp_slot *slot;
+ acpi_status status;
+
+ bridge = acpiphp_handle_to_bridge(handle);
+ if (!bridge) {
+ err("Could not find bridge for handle %p\n", handle);
+ return;
+ }
+
+ status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
+ handle_hotplug_event_bridge);
+ if (ACPI_FAILURE(status))
+ err("failed to remove notify handler\n");
+
+ slot = bridge->slots;
+ while (slot) {
+ struct acpiphp_slot *next = slot->next;
+ list_for_each_safe (list, tmp, &slot->funcs) {
+ struct acpiphp_func *func;
+ func = list_entry(list, struct acpiphp_func, sibling);
+ 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");
+ pci_dev_put(func->pci_dev);
+ list_del(list);
+ kfree(func);
+ }
+ kfree(slot);
+ slot = next;
+ }
+
+ pci_dev_put(bridge->pci_dev);
+ list_del(&bridge->list);
+ kfree(bridge);
}
@@ -782,70 +633,56 @@
*/
static int enable_device(struct acpiphp_slot *slot)
{
- u8 bus;
struct pci_dev *dev;
- struct pci_bus *child;
+ struct pci_bus *bus = slot->bridge->pci_bus;
struct list_head *l;
struct acpiphp_func *func;
int retval = 0;
- int num;
+ int num, max, pass;
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));
+ dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0));
if (dev) {
/* This case shouldn't happen */
err("pci_dev structure already exists.\n");
+ pci_dev_put(dev);
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) {
+ num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0));
+ if (num == 0) {
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);
+ max = bus->secondary;
+ for (pass = 0; pass < 2; pass++) {
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ if (PCI_SLOT(dev->devfn) != slot->device)
+ continue;
+ if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
+ dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
+ max = pci_scan_bridge(bus, dev, max, pass);
+ }
}
+ pci_bus_assign_resources(bus);
+ pci_bus_add_devices(bus);
+
/* 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->pci_dev = pci_get_slot(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;
}
@@ -866,9 +703,12 @@
list_for_each (l, &slot->funcs) {
func = list_entry(l, struct acpiphp_func, sibling);
+ if (!func->pci_dev)
+ continue;
- if (func->pci_dev)
- acpiphp_unconfigure_function(func);
+ pci_remove_bus_device(func->pci_dev);
+ pci_dev_put(func->pci_dev);
+ func->pci_dev = NULL;
}
slot->flags &= (~SLOT_ENABLED);
@@ -1116,46 +956,6 @@
*/
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);
}
@@ -1173,11 +973,14 @@
list_for_each (node, &bridge_list) {
bridge = (struct acpiphp_bridge *)node;
- dbg("Bus%d %dslot(s)\n", bridge->bus, bridge->nr_slots);
+ dbg("Bus %04x:%02x has %d slot%s\n",
+ pci_domain_nr(bridge->pci_bus),
+ bridge->pci_bus->number, bridge->nr_slots,
+ bridge->nr_slots == 1 ? "" : "s");
num_slots += bridge->nr_slots;
}
- dbg("Total %dslots\n", num_slots);
+ dbg("Total %d slots\n", num_slots);
return num_slots;
}
@@ -1274,13 +1077,6 @@
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;
@@ -1335,9 +1131,10 @@
u32 acpiphp_get_address(struct acpiphp_slot *slot)
{
u32 address;
+ struct pci_bus *pci_bus = slot->bridge->pci_bus;
- address = ((slot->bridge->seg) << 16) |
- ((slot->bridge->bus) << 8) |
+ address = (pci_domain_nr(pci_bus) << 16) |
+ (pci_bus->number << 8) |
slot->device;
return address;