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 #elif defined CONFIG_IA64_SGI_UV
22 #include <asm/sn/sn_sal.h>
23 #endif
24 #include "../sgi-gru/grukservices.h"
25 #include "xp.h"
26
27 /*
28 * Convert a virtual memory address to a physical memory address.
29 */
30 static unsigned long
xp_pa_uv(void * addr)31 xp_pa_uv(void *addr)
32 {
33 return uv_gpa(addr);
34 }
35
36 /*
37 * Convert a global physical to socket physical address.
38 */
39 static unsigned long
xp_socket_pa_uv(unsigned long gpa)40 xp_socket_pa_uv(unsigned long gpa)
41 {
42 return uv_gpa_to_soc_phys_ram(gpa);
43 }
44
45 static enum xp_retval
xp_remote_mmr_read(unsigned long dst_gpa,const unsigned long src_gpa,size_t len)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
65 static enum xp_retval
xp_remote_memcpy_uv(unsigned long dst_gpa,const unsigned long src_gpa,size_t len)66 xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
67 size_t len)
68 {
69 int ret;
70
71 if (uv_gpa_in_mmr_space(src_gpa))
72 return xp_remote_mmr_read(dst_gpa, src_gpa, len);
73
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;
81 }
82
83 static int
xp_cpu_to_nasid_uv(int cpuid)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
90 static enum xp_retval
xp_expand_memprotect_uv(unsigned long phys_addr,unsigned long size)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
103 #elif defined CONFIG_IA64_SGI_UV
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
xp_restrict_memprotect_uv(unsigned long phys_addr,unsigned long size)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
133 #elif defined CONFIG_IA64_SGI_UV
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
149 enum xp_retval
xp_init_uv(void)150 xp_init_uv(void)
151 {
152 WARN_ON(!is_uv_system());
153 if (!is_uv_system())
154 return xpUnsupported;
155
156 xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
157 #ifdef CONFIG_X86
158 xp_partition_id = sn_partition_id;
159 xp_region_size = sn_region_size;
160 #endif
161 xp_pa = xp_pa_uv;
162 xp_socket_pa = xp_socket_pa_uv;
163 xp_remote_memcpy = xp_remote_memcpy_uv;
164 xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
165 xp_expand_memprotect = xp_expand_memprotect_uv;
166 xp_restrict_memprotect = xp_restrict_memprotect_uv;
167
168 return xpSuccess;
169 }
170
171 void
xp_exit_uv(void)172 xp_exit_uv(void)
173 {
174 WARN_ON(!is_uv_system());
175 }
176