[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / misc / sgi-xp / xp_uv.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
 */

/*
 * Cross Partition (XP) uv-based functions.
 *
 *      Architecture specific implementation of common functions.
 *
 */

#include <linux/device.h>
#include <asm/uv/uv_hub.h>
#if defined CONFIG_X86_64
#include <asm/uv/bios.h>
#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
#include <asm/sn/sn_sal.h>
#endif
#include "../sgi-gru/grukservices.h"
#include "xp.h"

/*
 * Convert a virtual memory address to a physical memory address.
 */
static unsigned long
xp_pa_uv(void *addr)
{
	return uv_gpa(addr);
}

static enum xp_retval
xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
		    size_t len)
{
	int ret;

	ret = gru_copy_gpa(dst_gpa, src_gpa, len);
	if (ret == 0)
		return xpSuccess;

	dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
		"len=%ld\n", dst_gpa, src_gpa, len);
	return xpGruCopyError;
}

static int
xp_cpu_to_nasid_uv(int cpuid)
{
	/* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
	return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
}

static enum xp_retval
xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
{
	int ret;

#if defined CONFIG_X86_64
	ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW);
	if (ret != BIOS_STATUS_SUCCESS) {
		dev_err(xp, "uv_bios_change_memprotect(,, "
			"UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret);
		return xpBiosError;
	}

#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
	u64 nasid_array;

	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1,
				   &nasid_array);
	if (ret != 0) {
		dev_err(xp, "sn_change_memprotect(,, "
			"SN_MEMPROT_ACCESS_CLASS_1,) failed ret=%d\n", ret);
		return xpSalError;
	}
#else
	#error not a supported configuration
#endif
	return xpSuccess;
}

static enum xp_retval
xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
{
	int ret;

#if defined CONFIG_X86_64
	ret = uv_bios_change_memprotect(phys_addr, size,
					UV_MEMPROT_RESTRICT_ACCESS);
	if (ret != BIOS_STATUS_SUCCESS) {
		dev_err(xp, "uv_bios_change_memprotect(,, "
			"UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret);
		return xpBiosError;
	}

#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
	u64 nasid_array;

	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0,
				   &nasid_array);
	if (ret != 0) {
		dev_err(xp, "sn_change_memprotect(,, "
			"SN_MEMPROT_ACCESS_CLASS_0,) failed ret=%d\n", ret);
		return xpSalError;
	}
#else
	#error not a supported configuration
#endif
	return xpSuccess;
}

enum xp_retval
xp_init_uv(void)
{
	BUG_ON(!is_uv());

	xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
	xp_partition_id = sn_partition_id;
	xp_region_size = sn_region_size;

	xp_pa = xp_pa_uv;
	xp_remote_memcpy = xp_remote_memcpy_uv;
	xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
	xp_expand_memprotect = xp_expand_memprotect_uv;
	xp_restrict_memprotect = xp_restrict_memprotect_uv;

	return xpSuccess;
}

void
xp_exit_uv(void)
{
	BUG_ON(!is_uv());
}
Commit	Line	Data
bc63d387 DN	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
	7	*/
	8
	9	/*
	10	* Cross Partition (XP) uv-based functions.
	11	*
	12	* Architecture specific implementation of common functions.
	13	*
	14	*/
	15
a812dcc3 DN	16	#include <linux/device.h>
a812dcc3 DN	17	#include <asm/uv/uv_hub.h>
6c1c325d DN	18	#if defined CONFIG_X86_64
	19	#include <asm/uv/bios.h>
	20	#elif defined CONFIG_IA64_GENERIC \|\| defined CONFIG_IA64_SGI_UV
	21	#include <asm/sn/sn_sal.h>
	22	#endif
a812dcc3	23	#include "../sgi-gru/grukservices.h"
bc63d387 DN	24	#include "xp.h"
bc63d387 DN	25
a812dcc3 DN	26	/*
	27	* Convert a virtual memory address to a physical memory address.
	28	*/
	29	static unsigned long
	30	xp_pa_uv(void *addr)
	31	{
	32	return uv_gpa(addr);
	33	}
	34
908787db	35	static enum xp_retval
a812dcc3 DN	36	xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
a812dcc3 DN	37	size_t len)
908787db	38	{
a812dcc3 DN	39	int ret;
	40
	41	ret = gru_copy_gpa(dst_gpa, src_gpa, len);
	42	if (ret == 0)
	43	return xpSuccess;
	44
	45	dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
	46	"len=%ld\n", dst_gpa, src_gpa, len);
	47	return xpGruCopyError;
908787db DN	48	}
908787db DN	49
5b8669df DN	50	static int
	51	xp_cpu_to_nasid_uv(int cpuid)
	52	{
	53	/* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
	54	return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
	55	}
	56
6c1c325d DN	57	static enum xp_retval
	58	xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
	59	{
	60	int ret;
	61
	62	#if defined CONFIG_X86_64
	63	ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW);
	64	if (ret != BIOS_STATUS_SUCCESS) {
	65	dev_err(xp, "uv_bios_change_memprotect(,, "
	66	"UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret);
	67	return xpBiosError;
	68	}
	69
	70	#elif defined CONFIG_IA64_GENERIC \|\| defined CONFIG_IA64_SGI_UV
	71	u64 nasid_array;
	72
	73	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1,
	74	&nasid_array);
	75	if (ret != 0) {
	76	dev_err(xp, "sn_change_memprotect(,, "
	77	"SN_MEMPROT_ACCESS_CLASS_1,) failed ret=%d\n", ret);
	78	return xpSalError;
	79	}
	80	#else
	81	#error not a supported configuration
	82	#endif
	83	return xpSuccess;
	84	}
	85
	86	static enum xp_retval
	87	xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
	88	{
	89	int ret;
	90
	91	#if defined CONFIG_X86_64
	92	ret = uv_bios_change_memprotect(phys_addr, size,
	93	UV_MEMPROT_RESTRICT_ACCESS);
	94	if (ret != BIOS_STATUS_SUCCESS) {
	95	dev_err(xp, "uv_bios_change_memprotect(,, "
	96	"UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret);
	97	return xpBiosError;
	98	}
	99
	100	#elif defined CONFIG_IA64_GENERIC \|\| defined CONFIG_IA64_SGI_UV
	101	u64 nasid_array;
	102
	103	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0,
	104	&nasid_array);
	105	if (ret != 0) {
	106	dev_err(xp, "sn_change_memprotect(,, "
	107	"SN_MEMPROT_ACCESS_CLASS_0,) failed ret=%d\n", ret);
	108	return xpSalError;
	109	}
	110	#else
	111	#error not a supported configuration
	112	#endif
	113	return xpSuccess;
	114	}
	115
bc63d387 DN	116	enum xp_retval
	117	xp_init_uv(void)
	118	{
	119	BUG_ON(!is_uv());
	120
	121	xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
31de5ece DN	122	xp_partition_id = sn_partition_id;
31de5ece DN	123	xp_region_size = sn_region_size;
908787db	124
a812dcc3	125	xp_pa = xp_pa_uv;
908787db	126	xp_remote_memcpy = xp_remote_memcpy_uv;
5b8669df	127	xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
6c1c325d DN	128	xp_expand_memprotect = xp_expand_memprotect_uv;
6c1c325d DN	129	xp_restrict_memprotect = xp_restrict_memprotect_uv;
908787db DN	130
908787db DN	131	return xpSuccess;
bc63d387 DN	132	}
	133
	134	void
	135	xp_exit_uv(void)
	136	{
	137	BUG_ON(!is_uv());
	138	}