Loading...
1/*
2 * BIOS run time interface routines.
3 *
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
17 *
18 * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
19 * Copyright (c) Russ Anderson <rja@sgi.com>
20 */
21
22#include <linux/efi.h>
23#include <asm/efi.h>
24#include <linux/io.h>
25#include <asm/uv/bios.h>
26#include <asm/uv/uv_hub.h>
27
28static struct uv_systab uv_systab;
29
30s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
31{
32 struct uv_systab *tab = &uv_systab;
33 s64 ret;
34
35 if (!tab->function)
36 /*
37 * BIOS does not support UV systab
38 */
39 return BIOS_STATUS_UNIMPLEMENTED;
40
41 ret = efi_call6((void *)__va(tab->function), (u64)which,
42 a1, a2, a3, a4, a5);
43 return ret;
44}
45EXPORT_SYMBOL_GPL(uv_bios_call);
46
47s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
48 u64 a4, u64 a5)
49{
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
60s64 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();
68
69 return ret;
70}
71
72
73long sn_partition_id;
74EXPORT_SYMBOL_GPL(sn_partition_id);
75long sn_coherency_id;
76EXPORT_SYMBOL_GPL(sn_coherency_id);
77long sn_region_size;
78EXPORT_SYMBOL_GPL(sn_region_size);
79long system_serial_number;
80EXPORT_SYMBOL_GPL(system_serial_number);
81int uv_type;
82EXPORT_SYMBOL_GPL(uv_type);
83
84
85s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
86 long *region, long *ssn)
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;
106 if (ssn)
107 *ssn = v1;
108 return ret;
109}
110EXPORT_SYMBOL_GPL(uv_bios_get_sn_info);
111
112int
113uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
114 unsigned long *intr_mmr_offset)
115{
116 u64 watchlist;
117 s64 ret;
118
119 /*
120 * bios returns watchlist number or negative error number.
121 */
122 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
123 mq_size, (u64)intr_mmr_offset,
124 (u64)&watchlist, 0);
125 if (ret < BIOS_STATUS_SUCCESS)
126 return ret;
127
128 return watchlist;
129}
130EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
131
132int
133uv_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}
138EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
139
140s64
141uv_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}
146EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
147
148s64
149uv_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}
157EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
158
159s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
160{
161 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
162 (u64)ticks_per_second, 0, 0, 0);
163}
164EXPORT_SYMBOL_GPL(uv_bios_freq_base);
165
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 */
178int 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}
183EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
184
185
186#ifdef CONFIG_EFI
187void 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
209 printk(KERN_INFO "EFI UV System Table Revision %d\n",
210 uv_systab.revision);
211}
212#else /* !CONFIG_EFI */
213
214void uv_bios_init(void) { }
215#endif
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * BIOS run time interface routines.
4 *
5 * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
6 * Copyright (c) Russ Anderson <rja@sgi.com>
7 */
8
9#include <linux/efi.h>
10#include <linux/export.h>
11#include <linux/slab.h>
12#include <asm/efi.h>
13#include <linux/io.h>
14#include <asm/uv/bios.h>
15#include <asm/uv/uv_hub.h>
16
17unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
18
19struct uv_systab *uv_systab;
20
21static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
22 u64 a4, u64 a5)
23{
24 struct uv_systab *tab = uv_systab;
25 s64 ret;
26
27 if (!tab || !tab->function)
28 /*
29 * BIOS does not support UV systab
30 */
31 return BIOS_STATUS_UNIMPLEMENTED;
32
33 /*
34 * If EFI_OLD_MEMMAP is set, we need to fall back to using our old EFI
35 * callback method, which uses efi_call() directly, with the kernel page tables:
36 */
37 if (unlikely(efi_enabled(EFI_OLD_MEMMAP)))
38 ret = efi_call((void *)__va(tab->function), (u64)which, a1, a2, a3, a4, a5);
39 else
40 ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
41
42 return ret;
43}
44
45s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
46{
47 s64 ret;
48
49 if (down_interruptible(&__efi_uv_runtime_lock))
50 return BIOS_STATUS_ABORT;
51
52 ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
53 up(&__efi_uv_runtime_lock);
54
55 return ret;
56}
57EXPORT_SYMBOL_GPL(uv_bios_call);
58
59s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
60 u64 a4, u64 a5)
61{
62 unsigned long bios_flags;
63 s64 ret;
64
65 if (down_interruptible(&__efi_uv_runtime_lock))
66 return BIOS_STATUS_ABORT;
67
68 local_irq_save(bios_flags);
69 ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
70 local_irq_restore(bios_flags);
71
72 up(&__efi_uv_runtime_lock);
73
74 return ret;
75}
76
77
78long sn_partition_id;
79EXPORT_SYMBOL_GPL(sn_partition_id);
80long sn_coherency_id;
81EXPORT_SYMBOL_GPL(sn_coherency_id);
82long sn_region_size;
83EXPORT_SYMBOL_GPL(sn_region_size);
84long system_serial_number;
85EXPORT_SYMBOL_GPL(system_serial_number);
86int uv_type;
87EXPORT_SYMBOL_GPL(uv_type);
88
89
90s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
91 long *region, long *ssn)
92{
93 s64 ret;
94 u64 v0, v1;
95 union partition_info_u part;
96
97 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
98 (u64)(&v0), (u64)(&v1), 0, 0);
99 if (ret != BIOS_STATUS_SUCCESS)
100 return ret;
101
102 part.val = v0;
103 if (uvtype)
104 *uvtype = part.hub_version;
105 if (partid)
106 *partid = part.partition_id;
107 if (coher)
108 *coher = part.coherence_id;
109 if (region)
110 *region = part.region_size;
111 if (ssn)
112 *ssn = v1;
113 return ret;
114}
115EXPORT_SYMBOL_GPL(uv_bios_get_sn_info);
116
117int
118uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
119 unsigned long *intr_mmr_offset)
120{
121 u64 watchlist;
122 s64 ret;
123
124 /*
125 * bios returns watchlist number or negative error number.
126 */
127 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
128 mq_size, (u64)intr_mmr_offset,
129 (u64)&watchlist, 0);
130 if (ret < BIOS_STATUS_SUCCESS)
131 return ret;
132
133 return watchlist;
134}
135EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
136
137int
138uv_bios_mq_watchlist_free(int blade, int watchlist_num)
139{
140 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
141 blade, watchlist_num, 0, 0, 0);
142}
143EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
144
145s64
146uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
147{
148 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
149 perms, 0, 0);
150}
151EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
152
153s64
154uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
155{
156 return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
157 (u64)addr, buf, (u64)len, 0);
158}
159EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
160
161s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
162{
163 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
164 (u64)ticks_per_second, 0, 0, 0);
165}
166EXPORT_SYMBOL_GPL(uv_bios_freq_base);
167
168/*
169 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
170 * @decode: true to enable target, false to disable target
171 * @domain: PCI domain number
172 * @bus: PCI bus number
173 *
174 * Returns:
175 * 0: Success
176 * -EINVAL: Invalid domain or bus number
177 * -ENOSYS: Capability not available
178 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time
179 */
180int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
181{
182 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
183 (u64)decode, (u64)domain, (u64)bus, 0, 0);
184}
185EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
186
187void uv_bios_init(void)
188{
189 uv_systab = NULL;
190 if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) ||
191 !uv_systab_phys || efi_runtime_disabled()) {
192 pr_crit("UV: UVsystab: missing\n");
193 return;
194 }
195
196 uv_systab = ioremap(uv_systab_phys, 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 }
202
203 /* Starting with UV4 the UV systab size is variable */
204 if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
205 int size = uv_systab->size;
206
207 iounmap(uv_systab);
208 uv_systab = ioremap(uv_systab_phys, size);
209 if (!uv_systab) {
210 pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
211 return;
212 }
213 }
214 pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);
215}