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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 RA |
22 | #include <linux/efi.h> |
23 | #include <asm/efi.h> | |
24 | #include <linux/io.h> | |
7019cc2d | 25 | #include <asm/uv/bios.h> |
922402f1 | 26 | #include <asm/uv/uv_hub.h> |
7019cc2d | 27 | |
c62e9d56 | 28 | static struct uv_systab uv_systab; |
7f594232 RA |
29 | |
30 | s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5) | |
7019cc2d | 31 | { |
7f594232 | 32 | struct uv_systab *tab = &uv_systab; |
b76365a1 | 33 | s64 ret; |
7f594232 RA |
34 | |
35 | if (!tab->function) | |
36 | /* | |
37 | * BIOS does not support UV systab | |
38 | */ | |
39 | return BIOS_STATUS_UNIMPLEMENTED; | |
40 | ||
b76365a1 RA |
41 | ret = efi_call6((void *)__va(tab->function), (u64)which, |
42 | a1, a2, a3, a4, a5); | |
43 | return ret; | |
7019cc2d | 44 | } |
b76365a1 | 45 | EXPORT_SYMBOL_GPL(uv_bios_call); |
7019cc2d | 46 | |
7f594232 RA |
47 | s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, |
48 | u64 a4, u64 a5) | |
7019cc2d | 49 | { |
7f594232 RA |
50 | unsigned long bios_flags; |
51 | s64 ret; | |
52 | ||
53 | local_irq_save(bios_flags); | |
54 | ret = uv_bios_call(which, a1, a2, a3, a4, a5); | |
55 | local_irq_restore(bios_flags); | |
56 | ||
57 | return ret; | |
58 | } | |
59 | ||
60 | s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, | |
61 | u64 a4, u64 a5) | |
62 | { | |
63 | s64 ret; | |
64 | ||
65 | preempt_disable(); | |
66 | ret = uv_bios_call(which, a1, a2, a3, a4, a5); | |
67 | preempt_enable(); | |
7019cc2d | 68 | |
7f594232 RA |
69 | return ret; |
70 | } | |
71 | ||
922402f1 RA |
72 | |
73 | long sn_partition_id; | |
74 | EXPORT_SYMBOL_GPL(sn_partition_id); | |
b0f20989 RA |
75 | long sn_coherency_id; |
76 | EXPORT_SYMBOL_GPL(sn_coherency_id); | |
77 | long sn_region_size; | |
78 | EXPORT_SYMBOL_GPL(sn_region_size); | |
b76365a1 RA |
79 | long system_serial_number; |
80 | EXPORT_SYMBOL_GPL(system_serial_number); | |
922402f1 | 81 | int uv_type; |
b76365a1 | 82 | EXPORT_SYMBOL_GPL(uv_type); |
922402f1 RA |
83 | |
84 | ||
85 | s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher, | |
b76365a1 | 86 | long *region, long *ssn) |
922402f1 RA |
87 | { |
88 | s64 ret; | |
89 | u64 v0, v1; | |
90 | union partition_info_u part; | |
91 | ||
92 | ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc, | |
93 | (u64)(&v0), (u64)(&v1), 0, 0); | |
94 | if (ret != BIOS_STATUS_SUCCESS) | |
95 | return ret; | |
96 | ||
97 | part.val = v0; | |
98 | if (uvtype) | |
99 | *uvtype = part.hub_version; | |
100 | if (partid) | |
101 | *partid = part.partition_id; | |
102 | if (coher) | |
103 | *coher = part.coherence_id; | |
104 | if (region) | |
105 | *region = part.region_size; | |
b76365a1 RA |
106 | if (ssn) |
107 | *ssn = v1; | |
922402f1 RA |
108 | return ret; |
109 | } | |
b76365a1 | 110 | EXPORT_SYMBOL_GPL(uv_bios_get_sn_info); |
922402f1 | 111 | |
64ccf2f9 | 112 | int |
c2c9f115 | 113 | uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size, |
64ccf2f9 RA |
114 | unsigned long *intr_mmr_offset) |
115 | { | |
64ccf2f9 RA |
116 | u64 watchlist; |
117 | s64 ret; | |
118 | ||
64ccf2f9 RA |
119 | /* |
120 | * bios returns watchlist number or negative error number. | |
121 | */ | |
122 | ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr, | |
c2c9f115 | 123 | mq_size, (u64)intr_mmr_offset, |
64ccf2f9 RA |
124 | (u64)&watchlist, 0); |
125 | if (ret < BIOS_STATUS_SUCCESS) | |
126 | return ret; | |
127 | ||
128 | return watchlist; | |
129 | } | |
130 | EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc); | |
131 | ||
132 | int | |
133 | uv_bios_mq_watchlist_free(int blade, int watchlist_num) | |
134 | { | |
135 | return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE, | |
136 | blade, watchlist_num, 0, 0, 0); | |
137 | } | |
138 | EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free); | |
922402f1 | 139 | |
e8929c8a RA |
140 | s64 |
141 | uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms) | |
142 | { | |
143 | return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len, | |
144 | perms, 0, 0); | |
145 | } | |
146 | EXPORT_SYMBOL_GPL(uv_bios_change_memprotect); | |
147 | ||
23c35700 RA |
148 | s64 |
149 | uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len) | |
150 | { | |
151 | s64 ret; | |
152 | ||
153 | ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie, | |
154 | (u64)addr, buf, (u64)len, 0); | |
155 | return ret; | |
156 | } | |
157 | EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa); | |
158 | ||
922402f1 | 159 | s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) |
7f594232 RA |
160 | { |
161 | return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, | |
922402f1 | 162 | (u64)ticks_per_second, 0, 0, 0); |
7019cc2d | 163 | } |
922402f1 | 164 | EXPORT_SYMBOL_GPL(uv_bios_freq_base); |
7f594232 | 165 | |
841582ea MT |
166 | /* |
167 | * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target | |
168 | * @decode: true to enable target, false to disable target | |
169 | * @domain: PCI domain number | |
170 | * @bus: PCI bus number | |
171 | * | |
172 | * Returns: | |
173 | * 0: Success | |
174 | * -EINVAL: Invalid domain or bus number | |
175 | * -ENOSYS: Capability not available | |
176 | * -EBUSY: Legacy VGA I/O cannot be retargeted at this time | |
177 | */ | |
178 | int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus) | |
179 | { | |
180 | return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET, | |
181 | (u64)decode, (u64)domain, (u64)bus, 0, 0); | |
182 | } | |
183 | EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target); | |
184 | ||
7f594232 RA |
185 | |
186 | #ifdef CONFIG_EFI | |
187 | void uv_bios_init(void) | |
188 | { | |
189 | struct uv_systab *tab; | |
190 | ||
191 | if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || | |
192 | (efi.uv_systab == (unsigned long)NULL)) { | |
193 | printk(KERN_CRIT "No EFI UV System Table.\n"); | |
194 | uv_systab.function = (unsigned long)NULL; | |
195 | return; | |
196 | } | |
197 | ||
198 | tab = (struct uv_systab *)ioremap(efi.uv_systab, | |
199 | sizeof(struct uv_systab)); | |
200 | if (strncmp(tab->signature, "UVST", 4) != 0) | |
201 | printk(KERN_ERR "bad signature in UV system table!"); | |
202 | ||
203 | /* | |
204 | * Copy table to permanent spot for later use. | |
205 | */ | |
206 | memcpy(&uv_systab, tab, sizeof(struct uv_systab)); | |
207 | iounmap(tab); | |
208 | ||
1a544e65 RA |
209 | printk(KERN_INFO "EFI UV System Table Revision %d\n", |
210 | uv_systab.revision); | |
7f594232 RA |
211 | } |
212 | #else /* !CONFIG_EFI */ | |
213 | ||
214 | void uv_bios_init(void) { } | |
215 | #endif |