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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 | * | |
7a6d94f0 | 6 | * (C) Copyright 2020 Hewlett Packard Enterprise Development LP |
bc63d387 DN |
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 | ||
a812dcc3 DN |
17 | #include <linux/device.h> |
18 | #include <asm/uv/uv_hub.h> | |
6c1c325d DN |
19 | #if defined CONFIG_X86_64 |
20 | #include <asm/uv/bios.h> | |
df41017e | 21 | #elif defined CONFIG_IA64_SGI_UV |
6c1c325d DN |
22 | #include <asm/sn/sn_sal.h> |
23 | #endif | |
a812dcc3 | 24 | #include "../sgi-gru/grukservices.h" |
bc63d387 DN |
25 | #include "xp.h" |
26 | ||
a812dcc3 DN |
27 | /* |
28 | * Convert a virtual memory address to a physical memory address. | |
29 | */ | |
30 | static unsigned long | |
31 | xp_pa_uv(void *addr) | |
32 | { | |
33 | return uv_gpa(addr); | |
34 | } | |
35 | ||
68212893 RH |
36 | /* |
37 | * Convert a global physical to socket physical address. | |
38 | */ | |
39 | static unsigned long | |
40 | xp_socket_pa_uv(unsigned long gpa) | |
41 | { | |
42 | return uv_gpa_to_soc_phys_ram(gpa); | |
43 | } | |
44 | ||
c2c9f115 RH |
45 | static enum xp_retval |
46 | xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa, | |
47 | size_t len) | |
48 | { | |
49 | int ret; | |
50 | unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa)); | |
51 | ||
52 | BUG_ON(!uv_gpa_in_mmr_space(src_gpa)); | |
53 | BUG_ON(len != 8); | |
54 | ||
55 | ret = gru_read_gpa(dst_va, src_gpa); | |
56 | if (ret == 0) | |
57 | return xpSuccess; | |
58 | ||
59 | dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx " | |
60 | "len=%ld\n", dst_gpa, src_gpa, len); | |
61 | return xpGruCopyError; | |
62 | } | |
63 | ||
64 | ||
908787db | 65 | static enum xp_retval |
a812dcc3 DN |
66 | xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa, |
67 | size_t len) | |
908787db | 68 | { |
a812dcc3 DN |
69 | int ret; |
70 | ||
c2c9f115 RH |
71 | if (uv_gpa_in_mmr_space(src_gpa)) |
72 | return xp_remote_mmr_read(dst_gpa, src_gpa, len); | |
73 | ||
a812dcc3 DN |
74 | ret = gru_copy_gpa(dst_gpa, src_gpa, len); |
75 | if (ret == 0) | |
76 | return xpSuccess; | |
77 | ||
78 | dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx " | |
79 | "len=%ld\n", dst_gpa, src_gpa, len); | |
80 | return xpGruCopyError; | |
908787db DN |
81 | } |
82 | ||
5b8669df DN |
83 | static int |
84 | xp_cpu_to_nasid_uv(int cpuid) | |
85 | { | |
86 | /* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */ | |
87 | return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid)); | |
88 | } | |
89 | ||
6c1c325d DN |
90 | static enum xp_retval |
91 | xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size) | |
92 | { | |
93 | int ret; | |
94 | ||
95 | #if defined CONFIG_X86_64 | |
96 | ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW); | |
97 | if (ret != BIOS_STATUS_SUCCESS) { | |
98 | dev_err(xp, "uv_bios_change_memprotect(,, " | |
99 | "UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret); | |
100 | return xpBiosError; | |
101 | } | |
102 | ||
df41017e | 103 | #elif defined CONFIG_IA64_SGI_UV |
6c1c325d DN |
104 | u64 nasid_array; |
105 | ||
106 | ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1, | |
107 | &nasid_array); | |
108 | if (ret != 0) { | |
109 | dev_err(xp, "sn_change_memprotect(,, " | |
110 | "SN_MEMPROT_ACCESS_CLASS_1,) failed ret=%d\n", ret); | |
111 | return xpSalError; | |
112 | } | |
113 | #else | |
114 | #error not a supported configuration | |
115 | #endif | |
116 | return xpSuccess; | |
117 | } | |
118 | ||
119 | static enum xp_retval | |
120 | xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size) | |
121 | { | |
122 | int ret; | |
123 | ||
124 | #if defined CONFIG_X86_64 | |
125 | ret = uv_bios_change_memprotect(phys_addr, size, | |
126 | UV_MEMPROT_RESTRICT_ACCESS); | |
127 | if (ret != BIOS_STATUS_SUCCESS) { | |
128 | dev_err(xp, "uv_bios_change_memprotect(,, " | |
129 | "UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret); | |
130 | return xpBiosError; | |
131 | } | |
132 | ||
df41017e | 133 | #elif defined CONFIG_IA64_SGI_UV |
6c1c325d DN |
134 | u64 nasid_array; |
135 | ||
136 | ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0, | |
137 | &nasid_array); | |
138 | if (ret != 0) { | |
139 | dev_err(xp, "sn_change_memprotect(,, " | |
140 | "SN_MEMPROT_ACCESS_CLASS_0,) failed ret=%d\n", ret); | |
141 | return xpSalError; | |
142 | } | |
143 | #else | |
144 | #error not a supported configuration | |
145 | #endif | |
146 | return xpSuccess; | |
147 | } | |
148 | ||
bc63d387 DN |
149 | enum xp_retval |
150 | xp_init_uv(void) | |
151 | { | |
788b66e3 MT |
152 | WARN_ON(!is_uv_system()); |
153 | if (!is_uv_system()) | |
154 | return xpUnsupported; | |
bc63d387 DN |
155 | |
156 | xp_max_npartitions = XP_MAX_NPARTITIONS_UV; | |
9726bfcd | 157 | #ifdef CONFIG_X86 |
31de5ece DN |
158 | xp_partition_id = sn_partition_id; |
159 | xp_region_size = sn_region_size; | |
9726bfcd | 160 | #endif |
a812dcc3 | 161 | xp_pa = xp_pa_uv; |
68212893 | 162 | xp_socket_pa = xp_socket_pa_uv; |
908787db | 163 | xp_remote_memcpy = xp_remote_memcpy_uv; |
5b8669df | 164 | xp_cpu_to_nasid = xp_cpu_to_nasid_uv; |
6c1c325d DN |
165 | xp_expand_memprotect = xp_expand_memprotect_uv; |
166 | xp_restrict_memprotect = xp_restrict_memprotect_uv; | |
908787db DN |
167 | |
168 | return xpSuccess; | |
bc63d387 DN |
169 | } |
170 | ||
171 | void | |
172 | xp_exit_uv(void) | |
173 | { | |
788b66e3 | 174 | WARN_ON(!is_uv_system()); |
bc63d387 | 175 | } |