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/drivers/misc/sgi-xp/xp_uv.c

https://bitbucket.org/ndreys/linux-sunxi
C | 171 lines | 124 code | 27 blank | 20 comment | 17 complexity | 318bb30b1bea099edc6160c5b46c262d MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  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
 16#include <linux/device.h>
 17#include <asm/uv/uv_hub.h>
 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
 23#include "../sgi-gru/grukservices.h"
 24#include "xp.h"
 25
 26/*
 27 * Convert a virtual memory address to a physical memory address.
 28 */
 29static unsigned long
 30xp_pa_uv(void *addr)
 31{
 32	return uv_gpa(addr);
 33}
 34
 35/*
 36 * Convert a global physical to socket physical address.
 37 */
 38static unsigned long
 39xp_socket_pa_uv(unsigned long gpa)
 40{
 41	return uv_gpa_to_soc_phys_ram(gpa);
 42}
 43
 44static enum xp_retval
 45xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa,
 46		   size_t len)
 47{
 48	int ret;
 49	unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa));
 50
 51	BUG_ON(!uv_gpa_in_mmr_space(src_gpa));
 52	BUG_ON(len != 8);
 53
 54	ret = gru_read_gpa(dst_va, src_gpa);
 55	if (ret == 0)
 56		return xpSuccess;
 57
 58	dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
 59		"len=%ld\n", dst_gpa, src_gpa, len);
 60	return xpGruCopyError;
 61}
 62
 63
 64static enum xp_retval
 65xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
 66		    size_t len)
 67{
 68	int ret;
 69
 70	if (uv_gpa_in_mmr_space(src_gpa))
 71		return xp_remote_mmr_read(dst_gpa, src_gpa, len);
 72
 73	ret = gru_copy_gpa(dst_gpa, src_gpa, len);
 74	if (ret == 0)
 75		return xpSuccess;
 76
 77	dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
 78		"len=%ld\n", dst_gpa, src_gpa, len);
 79	return xpGruCopyError;
 80}
 81
 82static int
 83xp_cpu_to_nasid_uv(int cpuid)
 84{
 85	/* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
 86	return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
 87}
 88
 89static enum xp_retval
 90xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
 91{
 92	int ret;
 93
 94#if defined CONFIG_X86_64
 95	ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW);
 96	if (ret != BIOS_STATUS_SUCCESS) {
 97		dev_err(xp, "uv_bios_change_memprotect(,, "
 98			"UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret);
 99		return xpBiosError;
100	}
101
102#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
103	u64 nasid_array;
104
105	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1,
106				   &nasid_array);
107	if (ret != 0) {
108		dev_err(xp, "sn_change_memprotect(,, "
109			"SN_MEMPROT_ACCESS_CLASS_1,) failed ret=%d\n", ret);
110		return xpSalError;
111	}
112#else
113	#error not a supported configuration
114#endif
115	return xpSuccess;
116}
117
118static enum xp_retval
119xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
120{
121	int ret;
122
123#if defined CONFIG_X86_64
124	ret = uv_bios_change_memprotect(phys_addr, size,
125					UV_MEMPROT_RESTRICT_ACCESS);
126	if (ret != BIOS_STATUS_SUCCESS) {
127		dev_err(xp, "uv_bios_change_memprotect(,, "
128			"UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret);
129		return xpBiosError;
130	}
131
132#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
133	u64 nasid_array;
134
135	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0,
136				   &nasid_array);
137	if (ret != 0) {
138		dev_err(xp, "sn_change_memprotect(,, "
139			"SN_MEMPROT_ACCESS_CLASS_0,) failed ret=%d\n", ret);
140		return xpSalError;
141	}
142#else
143	#error not a supported configuration
144#endif
145	return xpSuccess;
146}
147
148enum xp_retval
149xp_init_uv(void)
150{
151	BUG_ON(!is_uv());
152
153	xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
154	xp_partition_id = sn_partition_id;
155	xp_region_size = sn_region_size;
156
157	xp_pa = xp_pa_uv;
158	xp_socket_pa = xp_socket_pa_uv;
159	xp_remote_memcpy = xp_remote_memcpy_uv;
160	xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
161	xp_expand_memprotect = xp_expand_memprotect_uv;
162	xp_restrict_memprotect = xp_restrict_memprotect_uv;
163
164	return xpSuccess;
165}
166
167void
168xp_exit_uv(void)
169{
170	BUG_ON(!is_uv());
171}