/*
|
* BIOS run time interface routines.
|
*
|
* 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. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
*
|
* Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
|
* Copyright (c) Russ Anderson <rja@sgi.com>
|
*/
|
|
#include <linux/efi.h>
|
#include <linux/export.h>
|
#include <linux/slab.h>
|
#include <asm/efi.h>
|
#include <linux/io.h>
|
#include <asm/uv/bios.h>
|
#include <asm/uv/uv_hub.h>
|
|
struct uv_systab *uv_systab;
|
|
static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
|
u64 a4, u64 a5)
|
{
|
struct uv_systab *tab = uv_systab;
|
s64 ret;
|
|
if (!tab || !tab->function)
|
/*
|
* BIOS does not support UV systab
|
*/
|
return BIOS_STATUS_UNIMPLEMENTED;
|
|
/*
|
* If EFI_OLD_MEMMAP is set, we need to fall back to using our old EFI
|
* callback method, which uses efi_call() directly, with the kernel page tables:
|
*/
|
if (unlikely(test_bit(EFI_OLD_MEMMAP, &efi.flags)))
|
ret = efi_call((void *)__va(tab->function), (u64)which, a1, a2, a3, a4, a5);
|
else
|
ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
|
|
return ret;
|
}
|
|
s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
|
{
|
s64 ret;
|
|
if (down_interruptible(&__efi_uv_runtime_lock))
|
return BIOS_STATUS_ABORT;
|
|
ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
|
up(&__efi_uv_runtime_lock);
|
|
return ret;
|
}
|
EXPORT_SYMBOL_GPL(uv_bios_call);
|
|
s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
|
u64 a4, u64 a5)
|
{
|
unsigned long bios_flags;
|
s64 ret;
|
|
if (down_interruptible(&__efi_uv_runtime_lock))
|
return BIOS_STATUS_ABORT;
|
|
local_irq_save(bios_flags);
|
ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
|
local_irq_restore(bios_flags);
|
|
up(&__efi_uv_runtime_lock);
|
|
return ret;
|
}
|
|
s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
|
u64 a4, u64 a5)
|
{
|
s64 ret;
|
|
preempt_disable();
|
ret = uv_bios_call(which, a1, a2, a3, a4, a5);
|
preempt_enable();
|
|
return ret;
|
}
|
|
|
long sn_partition_id;
|
EXPORT_SYMBOL_GPL(sn_partition_id);
|
long sn_coherency_id;
|
EXPORT_SYMBOL_GPL(sn_coherency_id);
|
long sn_region_size;
|
EXPORT_SYMBOL_GPL(sn_region_size);
|
long system_serial_number;
|
EXPORT_SYMBOL_GPL(system_serial_number);
|
int uv_type;
|
EXPORT_SYMBOL_GPL(uv_type);
|
|
|
s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
|
long *region, long *ssn)
|
{
|
s64 ret;
|
u64 v0, v1;
|
union partition_info_u part;
|
|
ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
|
(u64)(&v0), (u64)(&v1), 0, 0);
|
if (ret != BIOS_STATUS_SUCCESS)
|
return ret;
|
|
part.val = v0;
|
if (uvtype)
|
*uvtype = part.hub_version;
|
if (partid)
|
*partid = part.partition_id;
|
if (coher)
|
*coher = part.coherence_id;
|
if (region)
|
*region = part.region_size;
|
if (ssn)
|
*ssn = v1;
|
return ret;
|
}
|
EXPORT_SYMBOL_GPL(uv_bios_get_sn_info);
|
|
int
|
uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
|
unsigned long *intr_mmr_offset)
|
{
|
u64 watchlist;
|
s64 ret;
|
|
/*
|
* bios returns watchlist number or negative error number.
|
*/
|
ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
|
mq_size, (u64)intr_mmr_offset,
|
(u64)&watchlist, 0);
|
if (ret < BIOS_STATUS_SUCCESS)
|
return ret;
|
|
return watchlist;
|
}
|
EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
|
|
int
|
uv_bios_mq_watchlist_free(int blade, int watchlist_num)
|
{
|
return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
|
blade, watchlist_num, 0, 0, 0);
|
}
|
EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
|
|
s64
|
uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
|
{
|
return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
|
perms, 0, 0);
|
}
|
EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
|
|
s64
|
uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
|
{
|
return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
|
(u64)addr, buf, (u64)len, 0);
|
}
|
EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
|
|
s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
|
{
|
return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
|
(u64)ticks_per_second, 0, 0, 0);
|
}
|
EXPORT_SYMBOL_GPL(uv_bios_freq_base);
|
|
/*
|
* uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
|
* @decode: true to enable target, false to disable target
|
* @domain: PCI domain number
|
* @bus: PCI bus number
|
*
|
* Returns:
|
* 0: Success
|
* -EINVAL: Invalid domain or bus number
|
* -ENOSYS: Capability not available
|
* -EBUSY: Legacy VGA I/O cannot be retargeted at this time
|
*/
|
int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
|
{
|
return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
|
(u64)decode, (u64)domain, (u64)bus, 0, 0);
|
}
|
EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
|
|
#ifdef CONFIG_EFI
|
void uv_bios_init(void)
|
{
|
uv_systab = NULL;
|
if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
|
!efi.uv_systab || efi_runtime_disabled()) {
|
pr_crit("UV: UVsystab: missing\n");
|
return;
|
}
|
|
uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab));
|
if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
|
pr_err("UV: UVsystab: bad signature!\n");
|
iounmap(uv_systab);
|
return;
|
}
|
|
/* Starting with UV4 the UV systab size is variable */
|
if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
|
int size = uv_systab->size;
|
|
iounmap(uv_systab);
|
uv_systab = ioremap(efi.uv_systab, size);
|
if (!uv_systab) {
|
pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
|
return;
|
}
|
}
|
pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);
|
}
|
#endif
|
