![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1345 lines
32 KiB
C
1345 lines
32 KiB
C
/*
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* ACPI PCI HotPlug glue functions to ACPI CA subsystem
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*
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* Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
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* Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
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* Copyright (C) 2002,2003 NEC Corporation
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <t-kochi@bq.jp.nec.com>
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/smp_lock.h>
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#include <asm/semaphore.h>
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#include "../pci.h"
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#include "pci_hotplug.h"
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#include "acpiphp.h"
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static LIST_HEAD(bridge_list);
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#define MY_NAME "acpiphp_glue"
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static void handle_hotplug_event_bridge (acpi_handle, u32, void *);
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static void handle_hotplug_event_func (acpi_handle, u32, void *);
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/*
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* initialization & terminatation routines
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*/
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/**
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* is_ejectable - determine if a slot is ejectable
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* @handle: handle to acpi namespace
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*
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* Ejectable slot should satisfy at least these conditions:
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*
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* 1. has _ADR method
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* 2. has _EJ0 method
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*
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* optionally
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*
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* 1. has _STA method
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* 2. has _PS0 method
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* 3. has _PS3 method
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* 4. ..
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*
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*/
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static int is_ejectable(acpi_handle handle)
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{
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acpi_status status;
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acpi_handle tmp;
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status = acpi_get_handle(handle, "_ADR", &tmp);
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if (ACPI_FAILURE(status)) {
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return 0;
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}
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status = acpi_get_handle(handle, "_EJ0", &tmp);
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if (ACPI_FAILURE(status)) {
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return 0;
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}
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return 1;
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}
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/* callback routine to check the existence of ejectable slots */
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static acpi_status
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is_ejectable_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
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{
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int *count = (int *)context;
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if (is_ejectable(handle)) {
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(*count)++;
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/* only one ejectable slot is enough */
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return AE_CTRL_TERMINATE;
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} else {
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return AE_OK;
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}
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}
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/* callback routine to register each ACPI PCI slot object */
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static acpi_status
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register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
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{
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struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context;
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struct acpiphp_slot *slot;
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struct acpiphp_func *newfunc;
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acpi_handle tmp;
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acpi_status status = AE_OK;
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unsigned long adr, sun;
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int device, function;
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static int num_slots = 0; /* XXX if we support I/O node hotplug... */
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status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
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if (ACPI_FAILURE(status))
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return AE_OK;
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status = acpi_get_handle(handle, "_EJ0", &tmp);
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if (ACPI_FAILURE(status))
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return AE_OK;
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device = (adr >> 16) & 0xffff;
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function = adr & 0xffff;
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newfunc = kmalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
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if (!newfunc)
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return AE_NO_MEMORY;
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memset(newfunc, 0, sizeof(struct acpiphp_func));
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INIT_LIST_HEAD(&newfunc->sibling);
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newfunc->handle = handle;
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newfunc->function = function;
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newfunc->flags = FUNC_HAS_EJ0;
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if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp)))
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newfunc->flags |= FUNC_HAS_STA;
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if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp)))
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newfunc->flags |= FUNC_HAS_PS0;
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if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp)))
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newfunc->flags |= FUNC_HAS_PS3;
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status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun);
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if (ACPI_FAILURE(status))
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sun = -1;
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/* search for objects that share the same slot */
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for (slot = bridge->slots; slot; slot = slot->next)
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if (slot->device == device) {
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if (slot->sun != sun)
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warn("sibling found, but _SUN doesn't match!\n");
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break;
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}
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if (!slot) {
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slot = kmalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
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if (!slot) {
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kfree(newfunc);
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return AE_NO_MEMORY;
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}
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memset(slot, 0, sizeof(struct acpiphp_slot));
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slot->bridge = bridge;
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slot->id = num_slots++;
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slot->device = device;
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slot->sun = sun;
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INIT_LIST_HEAD(&slot->funcs);
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init_MUTEX(&slot->crit_sect);
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slot->next = bridge->slots;
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bridge->slots = slot;
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bridge->nr_slots++;
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dbg("found ACPI PCI Hotplug slot at PCI %02x:%02x Slot:%d\n",
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slot->bridge->bus, slot->device, slot->sun);
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}
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newfunc->slot = slot;
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list_add_tail(&newfunc->sibling, &slot->funcs);
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/* associate corresponding pci_dev */
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newfunc->pci_dev = pci_find_slot(bridge->bus,
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PCI_DEVFN(device, function));
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if (newfunc->pci_dev) {
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if (acpiphp_init_func_resource(newfunc) < 0) {
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kfree(newfunc);
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return AE_ERROR;
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}
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slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON);
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}
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/* install notify handler */
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status = acpi_install_notify_handler(handle,
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ACPI_SYSTEM_NOTIFY,
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handle_hotplug_event_func,
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newfunc);
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if (ACPI_FAILURE(status)) {
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err("failed to register interrupt notify handler\n");
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return status;
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}
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return AE_OK;
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}
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/* see if it's worth looking at this bridge */
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static int detect_ejectable_slots(acpi_handle *bridge_handle)
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{
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acpi_status status;
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int count;
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count = 0;
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/* only check slots defined directly below bridge object */
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status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1,
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is_ejectable_slot, (void *)&count, NULL);
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return count;
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}
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/* decode ACPI _CRS data and convert into our internal resource list
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* TBD: _TRA, etc.
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*/
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static acpi_status
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decode_acpi_resource(struct acpi_resource *resource, void *context)
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{
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struct acpiphp_bridge *bridge = (struct acpiphp_bridge *) context;
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struct acpi_resource_address64 address;
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struct pci_resource *res;
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if (resource->id != ACPI_RSTYPE_ADDRESS16 &&
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resource->id != ACPI_RSTYPE_ADDRESS32 &&
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resource->id != ACPI_RSTYPE_ADDRESS64)
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return AE_OK;
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acpi_resource_to_address64(resource, &address);
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if (address.producer_consumer == ACPI_PRODUCER && address.address_length > 0) {
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dbg("resource type: %d: 0x%llx - 0x%llx\n", address.resource_type,
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(unsigned long long)address.min_address_range,
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(unsigned long long)address.max_address_range);
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res = acpiphp_make_resource(address.min_address_range,
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address.address_length);
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if (!res) {
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err("out of memory\n");
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return AE_OK;
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}
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switch (address.resource_type) {
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case ACPI_MEMORY_RANGE:
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if (address.attribute.memory.cache_attribute == ACPI_PREFETCHABLE_MEMORY) {
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res->next = bridge->p_mem_head;
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bridge->p_mem_head = res;
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} else {
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res->next = bridge->mem_head;
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bridge->mem_head = res;
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}
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break;
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case ACPI_IO_RANGE:
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res->next = bridge->io_head;
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bridge->io_head = res;
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break;
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case ACPI_BUS_NUMBER_RANGE:
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res->next = bridge->bus_head;
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bridge->bus_head = res;
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break;
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default:
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/* invalid type */
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kfree(res);
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break;
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}
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}
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return AE_OK;
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}
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/* decode ACPI 2.0 _HPP hot plug parameters */
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static void decode_hpp(struct acpiphp_bridge *bridge)
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{
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acpi_status status;
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struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER,
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.pointer = NULL};
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union acpi_object *package;
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int i;
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/* default numbers */
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bridge->hpp.cache_line_size = 0x10;
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bridge->hpp.latency_timer = 0x40;
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bridge->hpp.enable_SERR = 0;
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bridge->hpp.enable_PERR = 0;
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status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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dbg("_HPP evaluation failed\n");
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return;
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}
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package = (union acpi_object *) buffer.pointer;
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if (!package || package->type != ACPI_TYPE_PACKAGE ||
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package->package.count != 4 || !package->package.elements) {
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err("invalid _HPP object; ignoring\n");
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goto err_exit;
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}
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for (i = 0; i < 4; i++) {
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if (package->package.elements[i].type != ACPI_TYPE_INTEGER) {
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err("invalid _HPP parameter type; ignoring\n");
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goto err_exit;
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}
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}
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bridge->hpp.cache_line_size = package->package.elements[0].integer.value;
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bridge->hpp.latency_timer = package->package.elements[1].integer.value;
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bridge->hpp.enable_SERR = package->package.elements[2].integer.value;
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bridge->hpp.enable_PERR = package->package.elements[3].integer.value;
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dbg("_HPP parameter = (%02x, %02x, %02x, %02x)\n",
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bridge->hpp.cache_line_size,
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bridge->hpp.latency_timer,
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bridge->hpp.enable_SERR,
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bridge->hpp.enable_PERR);
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bridge->flags |= BRIDGE_HAS_HPP;
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err_exit:
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kfree(buffer.pointer);
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}
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/* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */
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static void init_bridge_misc(struct acpiphp_bridge *bridge)
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{
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acpi_status status;
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/* decode ACPI 2.0 _HPP (hot plug parameters) */
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decode_hpp(bridge);
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/* subtract all resources already allocated */
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acpiphp_detect_pci_resource(bridge);
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/* register all slot objects under this bridge */
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status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1,
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register_slot, bridge, NULL);
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/* install notify handler */
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status = acpi_install_notify_handler(bridge->handle,
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ACPI_SYSTEM_NOTIFY,
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handle_hotplug_event_bridge,
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bridge);
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if (ACPI_FAILURE(status)) {
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err("failed to register interrupt notify handler\n");
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}
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list_add(&bridge->list, &bridge_list);
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dbg("Bridge resource:\n");
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acpiphp_dump_resource(bridge);
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}
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/* allocate and initialize host bridge data structure */
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static void add_host_bridge(acpi_handle *handle, int seg, int bus)
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{
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acpi_status status;
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struct acpiphp_bridge *bridge;
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bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
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if (bridge == NULL)
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return;
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memset(bridge, 0, sizeof(struct acpiphp_bridge));
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bridge->type = BRIDGE_TYPE_HOST;
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bridge->handle = handle;
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bridge->seg = seg;
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bridge->bus = bus;
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bridge->pci_bus = pci_find_bus(seg, bus);
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spin_lock_init(&bridge->res_lock);
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/* to be overridden when we decode _CRS */
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bridge->sub = bridge->bus;
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/* decode resources */
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status = acpi_walk_resources(handle, METHOD_NAME__CRS,
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decode_acpi_resource, bridge);
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if (ACPI_FAILURE(status)) {
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err("failed to decode bridge resources\n");
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kfree(bridge);
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return;
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}
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acpiphp_resource_sort_and_combine(&bridge->io_head);
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acpiphp_resource_sort_and_combine(&bridge->mem_head);
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acpiphp_resource_sort_and_combine(&bridge->p_mem_head);
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acpiphp_resource_sort_and_combine(&bridge->bus_head);
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dbg("ACPI _CRS resource:\n");
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acpiphp_dump_resource(bridge);
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if (bridge->bus_head) {
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bridge->bus = bridge->bus_head->base;
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bridge->sub = bridge->bus_head->base + bridge->bus_head->length - 1;
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}
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init_bridge_misc(bridge);
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}
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/* allocate and initialize PCI-to-PCI bridge data structure */
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static void add_p2p_bridge(acpi_handle *handle, int seg, int bus, int dev, int fn)
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{
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struct acpiphp_bridge *bridge;
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u8 tmp8;
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u16 tmp16;
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u64 base64, limit64;
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u32 base, limit, base32u, limit32u;
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bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
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if (bridge == NULL) {
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err("out of memory\n");
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return;
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}
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memset(bridge, 0, sizeof(struct acpiphp_bridge));
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bridge->type = BRIDGE_TYPE_P2P;
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bridge->handle = handle;
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bridge->seg = seg;
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bridge->pci_dev = pci_find_slot(bus, PCI_DEVFN(dev, fn));
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if (!bridge->pci_dev) {
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err("Can't get pci_dev\n");
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kfree(bridge);
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return;
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}
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bridge->pci_bus = bridge->pci_dev->subordinate;
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if (!bridge->pci_bus) {
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err("This is not a PCI-to-PCI bridge!\n");
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kfree(bridge);
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return;
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}
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spin_lock_init(&bridge->res_lock);
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bridge->bus = bridge->pci_bus->number;
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bridge->sub = bridge->pci_bus->subordinate;
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/*
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* decode resources under this P2P bridge
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*/
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/* I/O resources */
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pci_read_config_byte(bridge->pci_dev, PCI_IO_BASE, &tmp8);
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base = tmp8;
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pci_read_config_byte(bridge->pci_dev, PCI_IO_LIMIT, &tmp8);
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limit = tmp8;
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switch (base & PCI_IO_RANGE_TYPE_MASK) {
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case PCI_IO_RANGE_TYPE_16:
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base = (base << 8) & 0xf000;
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limit = ((limit << 8) & 0xf000) + 0xfff;
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bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1);
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if (!bridge->io_head) {
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err("out of memory\n");
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kfree(bridge);
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return;
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}
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dbg("16bit I/O range: %04x-%04x\n",
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(u32)bridge->io_head->base,
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(u32)(bridge->io_head->base + bridge->io_head->length - 1));
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break;
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case PCI_IO_RANGE_TYPE_32:
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pci_read_config_word(bridge->pci_dev, PCI_IO_BASE_UPPER16, &tmp16);
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base = ((u32)tmp16 << 16) | ((base << 8) & 0xf000);
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pci_read_config_word(bridge->pci_dev, PCI_IO_LIMIT_UPPER16, &tmp16);
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limit = (((u32)tmp16 << 16) | ((limit << 8) & 0xf000)) + 0xfff;
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bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1);
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if (!bridge->io_head) {
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err("out of memory\n");
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kfree(bridge);
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return;
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}
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dbg("32bit I/O range: %08x-%08x\n",
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(u32)bridge->io_head->base,
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(u32)(bridge->io_head->base + bridge->io_head->length - 1));
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break;
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case 0x0f:
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dbg("I/O space unsupported\n");
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break;
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default:
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warn("Unknown I/O range type\n");
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}
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|
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/* Memory resources (mandatory for P2P bridge) */
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pci_read_config_word(bridge->pci_dev, PCI_MEMORY_BASE, &tmp16);
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base = (tmp16 & 0xfff0) << 16;
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pci_read_config_word(bridge->pci_dev, PCI_MEMORY_LIMIT, &tmp16);
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limit = ((tmp16 & 0xfff0) << 16) | 0xfffff;
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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)
|
|
*/
|
|
u32 acpiphp_get_address(struct acpiphp_slot *slot)
|
|
{
|
|
u32 address;
|
|
|
|
address = ((slot->bridge->seg) << 16) |
|
|
((slot->bridge->bus) << 8) |
|
|
slot->device;
|
|
|
|
return address;
|
|
}
|