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/******************************************************************************
* acpi.c
* acpi file for domain 0 kernel
*
* Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* Copyright (c) 2011 Yu Ke ke.yu@intel.com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation; or, when distributed
* separately from the Linux kernel or incorporated into other
* software packages, subject to the following license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this source file (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy, modify,
* merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <linux/pci.h>
#include <xen/acpi.h>
#include <xen/interface/platform.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/hypervisor.h>
static int xen_acpi_notify_hypervisor_state(u8 sleep_state,
u32 val_a, u32 val_b,
bool extended)
{
unsigned int bits = extended ? 8 : 16;
struct xen_platform_op op = {
.cmd = XENPF_enter_acpi_sleep,
.interface_version = XENPF_INTERFACE_VERSION,
.u.enter_acpi_sleep = {
.val_a = (u16)val_a,
.val_b = (u16)val_b,
.sleep_state = sleep_state,
.flags = extended ? XENPF_ACPI_SLEEP_EXTENDED : 0,
},
};
if (WARN((val_a & (~0 << bits)) || (val_b & (~0 << bits)),
"Using more than %u bits of sleep control values %#x/%#x!"
"Email xen-devel@lists.xen.org - Thank you.\n", \
bits, val_a, val_b))
return -1;
HYPERVISOR_platform_op(&op);
return 1;
}
int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
u32 pm1a_cnt, u32 pm1b_cnt)
{
return xen_acpi_notify_hypervisor_state(sleep_state, pm1a_cnt,
pm1b_cnt, false);
}
int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
u32 val_a, u32 val_b)
{
return xen_acpi_notify_hypervisor_state(sleep_state, val_a,
val_b, true);
}
struct acpi_prt_entry {
struct acpi_pci_id id;
u8 pin;
acpi_handle link;
u32 index;
};
int xen_acpi_get_gsi_info(struct pci_dev *dev,
int *gsi_out,
int *trigger_out,
int *polarity_out)
{
int gsi;
u8 pin;
struct acpi_prt_entry *entry;
int trigger = ACPI_LEVEL_SENSITIVE;
int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ?
ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW;
if (!dev || !gsi_out || !trigger_out || !polarity_out)
return -EINVAL;
pin = dev->pin;
if (!pin)
return -EINVAL;
entry = acpi_pci_irq_lookup(dev, pin);
if (entry) {
if (entry->link)
gsi = acpi_pci_link_allocate_irq(entry->link,
entry->index,
&trigger, &polarity,
NULL);
else
gsi = entry->index;
} else
gsi = -1;
if (gsi < 0)
return -EINVAL;
*gsi_out = gsi;
*trigger_out = trigger;
*polarity_out = polarity;
return 0;
}
EXPORT_SYMBOL_GPL(xen_acpi_get_gsi_info);
static get_gsi_from_sbdf_t get_gsi_from_sbdf;
static DEFINE_RWLOCK(get_gsi_from_sbdf_lock);
void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func)
{
write_lock(&get_gsi_from_sbdf_lock);
get_gsi_from_sbdf = func;
write_unlock(&get_gsi_from_sbdf_lock);
}
EXPORT_SYMBOL_GPL(xen_acpi_register_get_gsi_func);
int xen_acpi_get_gsi_from_sbdf(u32 sbdf)
{
int ret = -EOPNOTSUPP;
read_lock(&get_gsi_from_sbdf_lock);
if (get_gsi_from_sbdf)
ret = get_gsi_from_sbdf(sbdf);
read_unlock(&get_gsi_from_sbdf_lock);
return ret;
}
EXPORT_SYMBOL_GPL(xen_acpi_get_gsi_from_sbdf);
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