[deliverable/linux.git] / arch / x86 / kernel / bios_uv.c

/*
 * 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 Silicon Graphics, Inc.  All Rights Reserved.
 *  Copyright (c) Russ Anderson
 */

#include <linux/efi.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;

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;

	if (!tab->function)
		/*
		 * BIOS does not support UV systab
		 */
		return BIOS_STATUS_UNIMPLEMENTED;

	return efi_call6((void *)__va(tab->function),
					(u64)which, a1, a2, a3, a4, a5);
}

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;

	local_irq_save(bios_flags);
	ret = uv_bios_call(which, a1, a2, a3, a4, a5);
	local_irq_restore(bios_flags);

	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);
int uv_type;


s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
		long *region)
{
	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;
	return ret;
}

int
uv_bios_mq_watchlist_alloc(int blade, void *mq, unsigned int mq_size,
			   unsigned long *intr_mmr_offset)
{
	union uv_watchlist_u size_blade;
	unsigned long addr;
	u64 watchlist;
	s64 ret;

	addr = (unsigned long)mq;
	size_blade.size = mq_size;
	size_blade.blade = blade;

	/*
	 * bios returns watchlist number or negative error number.
	 */
	ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
			size_blade.val, (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_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);


#ifdef CONFIG_EFI
void uv_bios_init(void)
{
	struct uv_systab *tab;

	if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
	    (efi.uv_systab == (unsigned long)NULL)) {
		printk(KERN_CRIT "No EFI UV System Table.\n");
		uv_systab.function = (unsigned long)NULL;
		return;
	}

	tab = (struct uv_systab *)ioremap(efi.uv_systab,
					sizeof(struct uv_systab));
	if (strncmp(tab->signature, "UVST", 4) != 0)
		printk(KERN_ERR "bad signature in UV system table!");

	/*
	 * Copy table to permanent spot for later use.
	 */
	memcpy(&uv_systab, tab, sizeof(struct uv_systab));
	iounmap(tab);

	printk(KERN_INFO "EFI UV System Table Revision %d\n", tab->revision);
}
#else	/* !CONFIG_EFI */

void uv_bios_init(void) { }
#endif
Commit	Line	Data
7019cc2d RA	1	/*
	2	* BIOS run time interface routines.
	3	*
7019cc2d RA	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or
	7	* (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
7f594232 RA	17	*
	18	* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
	19	* Copyright (c) Russ Anderson
7019cc2d RA	20	*/
7019cc2d RA	21
7f594232 RA	22	#include <linux/efi.h>
	23	#include <asm/efi.h>
	24	#include <linux/io.h>
7019cc2d	25	#include <asm/uv/bios.h>
922402f1	26	#include <asm/uv/uv_hub.h>
7019cc2d	27
7f594232 RA	28	struct uv_systab uv_systab;
	29
	30	s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
7019cc2d	31	{
7f594232 RA	32	struct uv_systab *tab = &uv_systab;
	33
	34	if (!tab->function)
	35	/*
	36	* BIOS does not support UV systab
	37	*/
	38	return BIOS_STATUS_UNIMPLEMENTED;
	39
	40	return efi_call6((void *)__va(tab->function),
	41	(u64)which, a1, a2, a3, a4, a5);
7019cc2d RA	42	}
7019cc2d RA	43
7f594232 RA	44	s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
7f594232 RA	45	u64 a4, u64 a5)
7019cc2d	46	{
7f594232 RA	47	unsigned long bios_flags;
	48	s64 ret;
	49
	50	local_irq_save(bios_flags);
	51	ret = uv_bios_call(which, a1, a2, a3, a4, a5);
	52	local_irq_restore(bios_flags);
	53
	54	return ret;
	55	}
	56
	57	s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
	58	u64 a4, u64 a5)
	59	{
	60	s64 ret;
	61
	62	preempt_disable();
	63	ret = uv_bios_call(which, a1, a2, a3, a4, a5);
	64	preempt_enable();
7019cc2d	65
7f594232 RA	66	return ret;
	67	}
	68
922402f1 RA	69
	70	long sn_partition_id;
	71	EXPORT_SYMBOL_GPL(sn_partition_id);
b0f20989 RA	72	long sn_coherency_id;
	73	EXPORT_SYMBOL_GPL(sn_coherency_id);
	74	long sn_region_size;
	75	EXPORT_SYMBOL_GPL(sn_region_size);
922402f1 RA	76	int uv_type;
	77
	78
	79	s64 uv_bios_get_sn_info(int fc, int uvtype, long partid, long *coher,
	80	long *region)
	81	{
	82	s64 ret;
	83	u64 v0, v1;
	84	union partition_info_u part;
	85
	86	ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
	87	(u64)(&v0), (u64)(&v1), 0, 0);
	88	if (ret != BIOS_STATUS_SUCCESS)
	89	return ret;
	90
	91	part.val = v0;
	92	if (uvtype)
	93	*uvtype = part.hub_version;
	94	if (partid)
	95	*partid = part.partition_id;
	96	if (coher)
	97	*coher = part.coherence_id;
	98	if (region)
	99	*region = part.region_size;
	100	return ret;
	101	}
	102
64ccf2f9 RA	103	int
	104	uv_bios_mq_watchlist_alloc(int blade, void *mq, unsigned int mq_size,
	105	unsigned long *intr_mmr_offset)
	106	{
	107	union uv_watchlist_u size_blade;
	108	unsigned long addr;
	109	u64 watchlist;
	110	s64 ret;
	111
	112	addr = (unsigned long)mq;
	113	size_blade.size = mq_size;
	114	size_blade.blade = blade;
	115
	116	/*
	117	* bios returns watchlist number or negative error number.
	118	*/
	119	ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
	120	size_blade.val, (u64)intr_mmr_offset,
	121	(u64)&watchlist, 0);
	122	if (ret < BIOS_STATUS_SUCCESS)
	123	return ret;
	124
	125	return watchlist;
	126	}
	127	EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
	128
	129	int
	130	uv_bios_mq_watchlist_free(int blade, int watchlist_num)
	131	{
	132	return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
	133	blade, watchlist_num, 0, 0, 0);
	134	}
	135	EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
922402f1	136
e8929c8a RA	137	s64
	138	uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
	139	{
	140	return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
	141	perms, 0, 0);
	142	}
	143	EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
	144
922402f1	145	s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
7f594232 RA	146	{
7f594232 RA	147	return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
922402f1	148	(u64)ticks_per_second, 0, 0, 0);
7019cc2d	149	}
922402f1	150	EXPORT_SYMBOL_GPL(uv_bios_freq_base);
7f594232 RA	151
	152
	153	#ifdef CONFIG_EFI
	154	void uv_bios_init(void)
	155	{
	156	struct uv_systab *tab;
	157
	158	if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) \|\|
	159	(efi.uv_systab == (unsigned long)NULL)) {
	160	printk(KERN_CRIT "No EFI UV System Table.\n");
	161	uv_systab.function = (unsigned long)NULL;
	162	return;
	163	}
	164
	165	tab = (struct uv_systab *)ioremap(efi.uv_systab,
	166	sizeof(struct uv_systab));
	167	if (strncmp(tab->signature, "UVST", 4) != 0)
	168	printk(KERN_ERR "bad signature in UV system table!");
	169
	170	/*
	171	* Copy table to permanent spot for later use.
	172	*/
	173	memcpy(&uv_systab, tab, sizeof(struct uv_systab));
	174	iounmap(tab);
	175
	176	printk(KERN_INFO "EFI UV System Table Revision %d\n", tab->revision);
	177	}
	178	#else /* !CONFIG_EFI */
	179
	180	void uv_bios_init(void) { }
	181	#endif
	182