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7019cc2d RA |
1 | /* |
2 | * BIOS run time interface routines. | |
3 | * | |
7019cc2d RA |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
7f594232 | 17 | * |
b76365a1 RA |
18 | * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved. |
19 | * Copyright (c) Russ Anderson <rja@sgi.com> | |
7019cc2d RA |
20 | */ |
21 | ||
7f594232 | 22 | #include <linux/efi.h> |
69c60c88 | 23 | #include <linux/export.h> |
ef93bf80 | 24 | #include <linux/slab.h> |
7f594232 RA |
25 | #include <asm/efi.h> |
26 | #include <linux/io.h> | |
7019cc2d | 27 | #include <asm/uv/bios.h> |
922402f1 | 28 | #include <asm/uv/uv_hub.h> |
7019cc2d | 29 | |
ef93bf80 | 30 | struct uv_systab *uv_systab; |
7f594232 RA |
31 | |
32 | s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5) | |
7019cc2d | 33 | { |
ef93bf80 | 34 | struct uv_systab *tab = uv_systab; |
b76365a1 | 35 | s64 ret; |
7f594232 | 36 | |
ef93bf80 | 37 | if (!tab || !tab->function) |
7f594232 RA |
38 | /* |
39 | * BIOS does not support UV systab | |
40 | */ | |
41 | return BIOS_STATUS_UNIMPLEMENTED; | |
42 | ||
d1be84a2 | 43 | ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5); |
b76365a1 | 44 | return ret; |
7019cc2d | 45 | } |
b76365a1 | 46 | EXPORT_SYMBOL_GPL(uv_bios_call); |
7019cc2d | 47 | |
7f594232 RA |
48 | s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, |
49 | u64 a4, u64 a5) | |
7019cc2d | 50 | { |
7f594232 RA |
51 | unsigned long bios_flags; |
52 | s64 ret; | |
53 | ||
54 | local_irq_save(bios_flags); | |
55 | ret = uv_bios_call(which, a1, a2, a3, a4, a5); | |
56 | local_irq_restore(bios_flags); | |
57 | ||
58 | return ret; | |
59 | } | |
60 | ||
61 | s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, | |
62 | u64 a4, u64 a5) | |
63 | { | |
64 | s64 ret; | |
65 | ||
66 | preempt_disable(); | |
67 | ret = uv_bios_call(which, a1, a2, a3, a4, a5); | |
68 | preempt_enable(); | |
7019cc2d | 69 | |
7f594232 RA |
70 | return ret; |
71 | } | |
72 | ||
922402f1 RA |
73 | |
74 | long sn_partition_id; | |
75 | EXPORT_SYMBOL_GPL(sn_partition_id); | |
b0f20989 RA |
76 | long sn_coherency_id; |
77 | EXPORT_SYMBOL_GPL(sn_coherency_id); | |
78 | long sn_region_size; | |
79 | EXPORT_SYMBOL_GPL(sn_region_size); | |
b76365a1 RA |
80 | long system_serial_number; |
81 | EXPORT_SYMBOL_GPL(system_serial_number); | |
922402f1 | 82 | int uv_type; |
b76365a1 | 83 | EXPORT_SYMBOL_GPL(uv_type); |
922402f1 RA |
84 | |
85 | ||
86 | s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher, | |
b76365a1 | 87 | long *region, long *ssn) |
922402f1 RA |
88 | { |
89 | s64 ret; | |
90 | u64 v0, v1; | |
91 | union partition_info_u part; | |
92 | ||
93 | ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc, | |
94 | (u64)(&v0), (u64)(&v1), 0, 0); | |
95 | if (ret != BIOS_STATUS_SUCCESS) | |
96 | return ret; | |
97 | ||
98 | part.val = v0; | |
99 | if (uvtype) | |
100 | *uvtype = part.hub_version; | |
101 | if (partid) | |
102 | *partid = part.partition_id; | |
103 | if (coher) | |
104 | *coher = part.coherence_id; | |
105 | if (region) | |
106 | *region = part.region_size; | |
b76365a1 RA |
107 | if (ssn) |
108 | *ssn = v1; | |
922402f1 RA |
109 | return ret; |
110 | } | |
b76365a1 | 111 | EXPORT_SYMBOL_GPL(uv_bios_get_sn_info); |
922402f1 | 112 | |
64ccf2f9 | 113 | int |
c2c9f115 | 114 | uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size, |
64ccf2f9 RA |
115 | unsigned long *intr_mmr_offset) |
116 | { | |
64ccf2f9 RA |
117 | u64 watchlist; |
118 | s64 ret; | |
119 | ||
64ccf2f9 RA |
120 | /* |
121 | * bios returns watchlist number or negative error number. | |
122 | */ | |
123 | ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr, | |
c2c9f115 | 124 | mq_size, (u64)intr_mmr_offset, |
64ccf2f9 RA |
125 | (u64)&watchlist, 0); |
126 | if (ret < BIOS_STATUS_SUCCESS) | |
127 | return ret; | |
128 | ||
129 | return watchlist; | |
130 | } | |
131 | EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc); | |
132 | ||
133 | int | |
134 | uv_bios_mq_watchlist_free(int blade, int watchlist_num) | |
135 | { | |
136 | return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE, | |
137 | blade, watchlist_num, 0, 0, 0); | |
138 | } | |
139 | EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free); | |
922402f1 | 140 | |
e8929c8a RA |
141 | s64 |
142 | uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms) | |
143 | { | |
144 | return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len, | |
145 | perms, 0, 0); | |
146 | } | |
147 | EXPORT_SYMBOL_GPL(uv_bios_change_memprotect); | |
148 | ||
23c35700 RA |
149 | s64 |
150 | uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len) | |
151 | { | |
152 | s64 ret; | |
153 | ||
154 | ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie, | |
155 | (u64)addr, buf, (u64)len, 0); | |
156 | return ret; | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa); | |
159 | ||
922402f1 | 160 | s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) |
7f594232 RA |
161 | { |
162 | return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, | |
922402f1 | 163 | (u64)ticks_per_second, 0, 0, 0); |
7019cc2d | 164 | } |
922402f1 | 165 | EXPORT_SYMBOL_GPL(uv_bios_freq_base); |
7f594232 | 166 | |
841582ea MT |
167 | /* |
168 | * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target | |
169 | * @decode: true to enable target, false to disable target | |
170 | * @domain: PCI domain number | |
171 | * @bus: PCI bus number | |
172 | * | |
173 | * Returns: | |
174 | * 0: Success | |
175 | * -EINVAL: Invalid domain or bus number | |
176 | * -ENOSYS: Capability not available | |
177 | * -EBUSY: Legacy VGA I/O cannot be retargeted at this time | |
178 | */ | |
179 | int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus) | |
180 | { | |
181 | return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET, | |
182 | (u64)decode, (u64)domain, (u64)bus, 0, 0); | |
183 | } | |
184 | EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target); | |
185 | ||
7f594232 RA |
186 | #ifdef CONFIG_EFI |
187 | void uv_bios_init(void) | |
188 | { | |
ef93bf80 | 189 | uv_systab = NULL; |
f72075c9 AT |
190 | if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || |
191 | !efi.uv_systab || efi_runtime_disabled()) { | |
ef93bf80 | 192 | pr_crit("UV: UVsystab: missing\n"); |
7f594232 RA |
193 | return; |
194 | } | |
195 | ||
ef93bf80 MT |
196 | uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab)); |
197 | if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) { | |
198 | pr_err("UV: UVsystab: bad signature!\n"); | |
199 | iounmap(uv_systab); | |
200 | return; | |
201 | } | |
7f594232 | 202 | |
e363d24c | 203 | /* Starting with UV4 the UV systab size is variable */ |
ef93bf80 | 204 | if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) { |
e363d24c MT |
205 | int size = uv_systab->size; |
206 | ||
ef93bf80 | 207 | iounmap(uv_systab); |
e363d24c | 208 | uv_systab = ioremap(efi.uv_systab, size); |
ef93bf80 | 209 | if (!uv_systab) { |
e363d24c | 210 | pr_err("UV: UVsystab: ioremap(%d) failed!\n", size); |
ef93bf80 MT |
211 | return; |
212 | } | |
213 | } | |
214 | pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision); | |
7f594232 | 215 | } |
7f594232 | 216 | #endif |