Staging: strip: delete the driver
[linux/fpc-iii.git] / drivers / misc / sgi-xp / xp_uv.c
bloba0d093274dc07a2bdf50c99d4d35c12490c77e01
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.
6 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
7 */
9 /*
10 * Cross Partition (XP) uv-based functions.
12 * Architecture specific implementation of common functions.
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"
27 * Convert a virtual memory address to a physical memory address.
29 static unsigned long
30 xp_pa_uv(void *addr)
32 return uv_gpa(addr);
36 * Convert a global physical to socket physical address.
38 static unsigned long
39 xp_socket_pa_uv(unsigned long gpa)
41 return uv_gpa_to_soc_phys_ram(gpa);
44 static enum xp_retval
45 xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa,
46 size_t len)
48 int ret;
49 unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa));
51 BUG_ON(!uv_gpa_in_mmr_space(src_gpa));
52 BUG_ON(len != 8);
54 ret = gru_read_gpa(dst_va, src_gpa);
55 if (ret == 0)
56 return xpSuccess;
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;
64 static enum xp_retval
65 xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
66 size_t len)
68 int ret;
70 if (uv_gpa_in_mmr_space(src_gpa))
71 return xp_remote_mmr_read(dst_gpa, src_gpa, len);
73 ret = gru_copy_gpa(dst_gpa, src_gpa, len);
74 if (ret == 0)
75 return xpSuccess;
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;
82 static int
83 xp_cpu_to_nasid_uv(int cpuid)
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));
89 static enum xp_retval
90 xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
92 int ret;
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;
102 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
103 u64 nasid_array;
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;
112 #else
113 #error not a supported configuration
114 #endif
115 return xpSuccess;
118 static enum xp_retval
119 xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
121 int ret;
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;
132 #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
133 u64 nasid_array;
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;
142 #else
143 #error not a supported configuration
144 #endif
145 return xpSuccess;
148 enum xp_retval
149 xp_init_uv(void)
151 BUG_ON(!is_uv());
153 xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
154 xp_partition_id = sn_partition_id;
155 xp_region_size = sn_region_size;
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;
164 return xpSuccess;
167 void
168 xp_exit_uv(void)
170 BUG_ON(!is_uv());