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1/******************************************************************************2 * acpi.c3 * acpi file for domain 0 kernel4 *5 * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>6 * Copyright (c) 2011 Yu Ke ke.yu@intel.com7 *8 * This program is free software; you can redistribute it and/or9 * modify it under the terms of the GNU General Public License version 210 * as published by the Free Software Foundation; or, when distributed11 * separately from the Linux kernel or incorporated into other12 * software packages, subject to the following license:13 *14 * Permission is hereby granted, free of charge, to any person obtaining a copy15 * of this source file (the "Software"), to deal in the Software without16 * restriction, including without limitation the rights to use, copy, modify,17 * merge, publish, distribute, sublicense, and/or sell copies of the Software,18 * and to permit persons to whom the Software is furnished to do so, subject to19 * the following conditions:20 *21 * The above copyright notice and this permission notice shall be included in22 * all copies or substantial portions of the Software.23 *24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE27 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING29 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS30 * IN THE SOFTWARE.31 */32 33#include <linux/pci.h>34#include <xen/acpi.h>35#include <xen/interface/platform.h>36#include <asm/xen/hypercall.h>37#include <asm/xen/hypervisor.h>38 39static int xen_acpi_notify_hypervisor_state(u8 sleep_state,40 u32 val_a, u32 val_b,41 bool extended)42{43 unsigned int bits = extended ? 8 : 16;44 45 struct xen_platform_op op = {46 .cmd = XENPF_enter_acpi_sleep,47 .interface_version = XENPF_INTERFACE_VERSION,48 .u.enter_acpi_sleep = {49 .val_a = (u16)val_a,50 .val_b = (u16)val_b,51 .sleep_state = sleep_state,52 .flags = extended ? XENPF_ACPI_SLEEP_EXTENDED : 0,53 },54 };55 56 if (WARN((val_a & (~0 << bits)) || (val_b & (~0 << bits)),57 "Using more than %u bits of sleep control values %#x/%#x!"58 "Email xen-devel@lists.xen.org - Thank you.\n", \59 bits, val_a, val_b))60 return -1;61 62 HYPERVISOR_platform_op(&op);63 return 1;64}65 66int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,67 u32 pm1a_cnt, u32 pm1b_cnt)68{69 return xen_acpi_notify_hypervisor_state(sleep_state, pm1a_cnt,70 pm1b_cnt, false);71}72 73int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,74 u32 val_a, u32 val_b)75{76 return xen_acpi_notify_hypervisor_state(sleep_state, val_a,77 val_b, true);78}79 80struct acpi_prt_entry {81 struct acpi_pci_id id;82 u8 pin;83 acpi_handle link;84 u32 index;85};86 87int xen_acpi_get_gsi_info(struct pci_dev *dev,88 int *gsi_out,89 int *trigger_out,90 int *polarity_out)91{92 int gsi;93 u8 pin;94 struct acpi_prt_entry *entry;95 int trigger = ACPI_LEVEL_SENSITIVE;96 int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ?97 ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW;98 99 if (!dev || !gsi_out || !trigger_out || !polarity_out)100 return -EINVAL;101 102 pin = dev->pin;103 if (!pin)104 return -EINVAL;105 106 entry = acpi_pci_irq_lookup(dev, pin);107 if (entry) {108 if (entry->link)109 gsi = acpi_pci_link_allocate_irq(entry->link,110 entry->index,111 &trigger, &polarity,112 NULL);113 else114 gsi = entry->index;115 } else116 gsi = -1;117 118 if (gsi < 0)119 return -EINVAL;120 121 *gsi_out = gsi;122 *trigger_out = trigger;123 *polarity_out = polarity;124 125 return 0;126}127EXPORT_SYMBOL_GPL(xen_acpi_get_gsi_info);128 129static get_gsi_from_sbdf_t get_gsi_from_sbdf;130static DEFINE_RWLOCK(get_gsi_from_sbdf_lock);131 132void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func)133{134 write_lock(&get_gsi_from_sbdf_lock);135 get_gsi_from_sbdf = func;136 write_unlock(&get_gsi_from_sbdf_lock);137}138EXPORT_SYMBOL_GPL(xen_acpi_register_get_gsi_func);139 140int xen_acpi_get_gsi_from_sbdf(u32 sbdf)141{142 int ret = -EOPNOTSUPP;143 144 read_lock(&get_gsi_from_sbdf_lock);145 if (get_gsi_from_sbdf)146 ret = get_gsi_from_sbdf(sbdf);147 read_unlock(&get_gsi_from_sbdf_lock);148 149 return ret;150}151EXPORT_SYMBOL_GPL(xen_acpi_get_gsi_from_sbdf);152