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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}
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 * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
7 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
8 */
9
10/*
11 * Cross Partition (XP) uv-based functions.
12 *
13 * Architecture specific implementation of common functions.
14 *
15 */
16
17#include <linux/device.h>
18#include <asm/uv/uv_hub.h>
19#if defined CONFIG_X86_64
20#include <asm/uv/bios.h>
21#endif
22#include "../sgi-gru/grukservices.h"
23#include "xp.h"
24
25/*
26 * Convert a virtual memory address to a physical memory address.
27 */
28static unsigned long
29xp_pa_uv(void *addr)
30{
31 return uv_gpa(addr);
32}
33
34/*
35 * Convert a global physical to socket physical address.
36 */
37static unsigned long
38xp_socket_pa_uv(unsigned long gpa)
39{
40 return uv_gpa_to_soc_phys_ram(gpa);
41}
42
43static enum xp_retval
44xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa,
45 size_t len)
46{
47 int ret;
48 unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa));
49
50 BUG_ON(!uv_gpa_in_mmr_space(src_gpa));
51 BUG_ON(len != 8);
52
53 ret = gru_read_gpa(dst_va, src_gpa);
54 if (ret == 0)
55 return xpSuccess;
56
57 dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
58 "len=%ld\n", dst_gpa, src_gpa, len);
59 return xpGruCopyError;
60}
61
62
63static enum xp_retval
64xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
65 size_t len)
66{
67 int ret;
68
69 if (uv_gpa_in_mmr_space(src_gpa))
70 return xp_remote_mmr_read(dst_gpa, src_gpa, len);
71
72 ret = gru_copy_gpa(dst_gpa, src_gpa, len);
73 if (ret == 0)
74 return xpSuccess;
75
76 dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
77 "len=%ld\n", dst_gpa, src_gpa, len);
78 return xpGruCopyError;
79}
80
81static int
82xp_cpu_to_nasid_uv(int cpuid)
83{
84 /* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
85 return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
86}
87
88static enum xp_retval
89xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
90{
91 int ret;
92
93#if defined CONFIG_X86_64
94 ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW);
95 if (ret != BIOS_STATUS_SUCCESS) {
96 dev_err(xp, "uv_bios_change_memprotect(,, "
97 "UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret);
98 return xpBiosError;
99 }
100#else
101 #error not a supported configuration
102#endif
103 return xpSuccess;
104}
105
106static enum xp_retval
107xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
108{
109 int ret;
110
111#if defined CONFIG_X86_64
112 ret = uv_bios_change_memprotect(phys_addr, size,
113 UV_MEMPROT_RESTRICT_ACCESS);
114 if (ret != BIOS_STATUS_SUCCESS) {
115 dev_err(xp, "uv_bios_change_memprotect(,, "
116 "UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret);
117 return xpBiosError;
118 }
119#else
120 #error not a supported configuration
121#endif
122 return xpSuccess;
123}
124
125enum xp_retval
126xp_init_uv(void)
127{
128 WARN_ON(!is_uv_system());
129 if (!is_uv_system())
130 return xpUnsupported;
131
132 xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
133#ifdef CONFIG_X86
134 xp_partition_id = sn_partition_id;
135 xp_region_size = sn_region_size;
136#endif
137 xp_pa = xp_pa_uv;
138 xp_socket_pa = xp_socket_pa_uv;
139 xp_remote_memcpy = xp_remote_memcpy_uv;
140 xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
141 xp_expand_memprotect = xp_expand_memprotect_uv;
142 xp_restrict_memprotect = xp_restrict_memprotect_uv;
143
144 return xpSuccess;
145}
146
147void
148xp_exit_uv(void)
149{
150 WARN_ON(!is_uv_system());
151}