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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * BIOS run time interface routines.
4 *
5 * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
6 * Copyright (C) 2007-2017 Silicon Graphics, Inc. All rights reserved.
7 * Copyright (c) Russ Anderson <rja@sgi.com>
8 */
9
10#include <linux/efi.h>
11#include <linux/export.h>
12#include <linux/slab.h>
13#include <asm/efi.h>
14#include <linux/io.h>
15#include <asm/pgalloc.h>
16#include <asm/uv/bios.h>
17#include <asm/uv/uv_hub.h>
18
19unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
20
21struct uv_systab *uv_systab;
22
23static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
24 u64 a4, u64 a5)
25{
26 struct uv_systab *tab = uv_systab;
27 s64 ret;
28
29 if (!tab || !tab->function)
30 /*
31 * BIOS does not support UV systab
32 */
33 return BIOS_STATUS_UNIMPLEMENTED;
34
35 ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
36
37 return ret;
38}
39
40static s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4,
41 u64 a5)
42{
43 s64 ret;
44
45 if (down_interruptible(&__efi_uv_runtime_lock))
46 return BIOS_STATUS_ABORT;
47
48 ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
49 up(&__efi_uv_runtime_lock);
50
51 return ret;
52}
53
54static s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
55 u64 a4, u64 a5)
56{
57 unsigned long bios_flags;
58 s64 ret;
59
60 if (down_interruptible(&__efi_uv_runtime_lock))
61 return BIOS_STATUS_ABORT;
62
63 local_irq_save(bios_flags);
64 ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
65 local_irq_restore(bios_flags);
66
67 up(&__efi_uv_runtime_lock);
68
69 return ret;
70}
71
72long sn_partition_id;
73EXPORT_SYMBOL_GPL(sn_partition_id);
74long sn_coherency_id;
75EXPORT_SYMBOL_GPL(sn_coherency_id);
76long sn_region_size;
77EXPORT_SYMBOL_GPL(sn_region_size);
78long system_serial_number;
79int uv_type;
80
81s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
82 long *region, long *ssn)
83{
84 s64 ret;
85 u64 v0, v1;
86 union partition_info_u part;
87
88 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
89 (u64)(&v0), (u64)(&v1), 0, 0);
90 if (ret != BIOS_STATUS_SUCCESS)
91 return ret;
92
93 part.val = v0;
94 if (uvtype)
95 *uvtype = part.hub_version;
96 if (partid)
97 *partid = part.partition_id;
98 if (coher)
99 *coher = part.coherence_id;
100 if (region)
101 *region = part.region_size;
102 if (ssn)
103 *ssn = v1;
104 return ret;
105}
106
107int
108uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
109 unsigned long *intr_mmr_offset)
110{
111 u64 watchlist;
112 s64 ret;
113
114 /*
115 * bios returns watchlist number or negative error number.
116 */
117 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
118 mq_size, (u64)intr_mmr_offset,
119 (u64)&watchlist, 0);
120 if (ret < BIOS_STATUS_SUCCESS)
121 return ret;
122
123 return watchlist;
124}
125EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
126
127int
128uv_bios_mq_watchlist_free(int blade, int watchlist_num)
129{
130 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
131 blade, watchlist_num, 0, 0, 0);
132}
133EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
134
135s64
136uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
137{
138 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
139 perms, 0, 0);
140}
141EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
142
143s64
144uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
145{
146 return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
147 (u64)addr, buf, (u64)len, 0);
148}
149EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
150
151s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
152{
153 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
154 (u64)ticks_per_second, 0, 0, 0);
155}
156
157/*
158 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
159 * @decode: true to enable target, false to disable target
160 * @domain: PCI domain number
161 * @bus: PCI bus number
162 *
163 * Returns:
164 * 0: Success
165 * -EINVAL: Invalid domain or bus number
166 * -ENOSYS: Capability not available
167 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time
168 */
169int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
170{
171 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
172 (u64)decode, (u64)domain, (u64)bus, 0, 0);
173}
174
175extern s64 uv_bios_get_master_nasid(u64 size, u64 *master_nasid)
176{
177 return uv_bios_call(UV_BIOS_EXTRA, 0, UV_BIOS_EXTRA_MASTER_NASID, 0,
178 size, (u64)master_nasid);
179}
180EXPORT_SYMBOL_GPL(uv_bios_get_master_nasid);
181
182extern s64 uv_bios_get_heapsize(u64 nasid, u64 size, u64 *heap_size)
183{
184 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_GET_HEAPSIZE,
185 0, size, (u64)heap_size);
186}
187EXPORT_SYMBOL_GPL(uv_bios_get_heapsize);
188
189extern s64 uv_bios_install_heap(u64 nasid, u64 heap_size, u64 *bios_heap)
190{
191 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_INSTALL_HEAP,
192 0, heap_size, (u64)bios_heap);
193}
194EXPORT_SYMBOL_GPL(uv_bios_install_heap);
195
196extern s64 uv_bios_obj_count(u64 nasid, u64 size, u64 *objcnt)
197{
198 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_OBJECT_COUNT,
199 0, size, (u64)objcnt);
200}
201EXPORT_SYMBOL_GPL(uv_bios_obj_count);
202
203extern s64 uv_bios_enum_objs(u64 nasid, u64 size, u64 *objbuf)
204{
205 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_OBJECTS,
206 0, size, (u64)objbuf);
207}
208EXPORT_SYMBOL_GPL(uv_bios_enum_objs);
209
210extern s64 uv_bios_enum_ports(u64 nasid, u64 obj_id, u64 size, u64 *portbuf)
211{
212 return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_PORTS,
213 obj_id, size, (u64)portbuf);
214}
215EXPORT_SYMBOL_GPL(uv_bios_enum_ports);
216
217extern s64 uv_bios_get_geoinfo(u64 nasid, u64 size, u64 *buf)
218{
219 return uv_bios_call(UV_BIOS_GET_GEOINFO, nasid, (u64)buf, size, 0, 0);
220}
221EXPORT_SYMBOL_GPL(uv_bios_get_geoinfo);
222
223extern s64 uv_bios_get_pci_topology(u64 size, u64 *buf)
224{
225 return uv_bios_call(UV_BIOS_GET_PCI_TOPOLOGY, (u64)buf, size, 0, 0, 0);
226}
227EXPORT_SYMBOL_GPL(uv_bios_get_pci_topology);
228
229unsigned long get_uv_systab_phys(bool msg)
230{
231 if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) ||
232 !uv_systab_phys || efi_runtime_disabled()) {
233 if (msg)
234 pr_crit("UV: UVsystab: missing\n");
235 return 0;
236 }
237 return uv_systab_phys;
238}
239
240int uv_bios_init(void)
241{
242 unsigned long uv_systab_phys_addr;
243
244 uv_systab = NULL;
245 uv_systab_phys_addr = get_uv_systab_phys(1);
246 if (!uv_systab_phys_addr)
247 return -EEXIST;
248
249 uv_systab = ioremap(uv_systab_phys_addr, sizeof(struct uv_systab));
250 if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
251 pr_err("UV: UVsystab: bad signature!\n");
252 iounmap(uv_systab);
253 return -EINVAL;
254 }
255
256 /* Starting with UV4 the UV systab size is variable */
257 if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
258 int size = uv_systab->size;
259
260 iounmap(uv_systab);
261 uv_systab = ioremap(uv_systab_phys_addr, size);
262 if (!uv_systab) {
263 pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
264 return -EFAULT;
265 }
266 }
267 pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);
268 return 0;
269}
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 <linux/export.h>
24#include <linux/slab.h>
25#include <asm/efi.h>
26#include <linux/io.h>
27#include <asm/uv/bios.h>
28#include <asm/uv/uv_hub.h>
29
30struct uv_systab *uv_systab;
31
32s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
33{
34 struct uv_systab *tab = uv_systab;
35 s64 ret;
36
37 if (!tab || !tab->function)
38 /*
39 * BIOS does not support UV systab
40 */
41 return BIOS_STATUS_UNIMPLEMENTED;
42
43 /*
44 * If EFI_OLD_MEMMAP is set, we need to fall back to using our old EFI
45 * callback method, which uses efi_call() directly, with the kernel page tables:
46 */
47 if (unlikely(test_bit(EFI_OLD_MEMMAP, &efi.flags)))
48 ret = efi_call((void *)__va(tab->function), (u64)which, a1, a2, a3, a4, a5);
49 else
50 ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
51
52 return ret;
53}
54EXPORT_SYMBOL_GPL(uv_bios_call);
55
56s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
57 u64 a4, u64 a5)
58{
59 unsigned long bios_flags;
60 s64 ret;
61
62 local_irq_save(bios_flags);
63 ret = uv_bios_call(which, a1, a2, a3, a4, a5);
64 local_irq_restore(bios_flags);
65
66 return ret;
67}
68
69s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
70 u64 a4, u64 a5)
71{
72 s64 ret;
73
74 preempt_disable();
75 ret = uv_bios_call(which, a1, a2, a3, a4, a5);
76 preempt_enable();
77
78 return ret;
79}
80
81
82long sn_partition_id;
83EXPORT_SYMBOL_GPL(sn_partition_id);
84long sn_coherency_id;
85EXPORT_SYMBOL_GPL(sn_coherency_id);
86long sn_region_size;
87EXPORT_SYMBOL_GPL(sn_region_size);
88long system_serial_number;
89EXPORT_SYMBOL_GPL(system_serial_number);
90int uv_type;
91EXPORT_SYMBOL_GPL(uv_type);
92
93
94s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
95 long *region, long *ssn)
96{
97 s64 ret;
98 u64 v0, v1;
99 union partition_info_u part;
100
101 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
102 (u64)(&v0), (u64)(&v1), 0, 0);
103 if (ret != BIOS_STATUS_SUCCESS)
104 return ret;
105
106 part.val = v0;
107 if (uvtype)
108 *uvtype = part.hub_version;
109 if (partid)
110 *partid = part.partition_id;
111 if (coher)
112 *coher = part.coherence_id;
113 if (region)
114 *region = part.region_size;
115 if (ssn)
116 *ssn = v1;
117 return ret;
118}
119EXPORT_SYMBOL_GPL(uv_bios_get_sn_info);
120
121int
122uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
123 unsigned long *intr_mmr_offset)
124{
125 u64 watchlist;
126 s64 ret;
127
128 /*
129 * bios returns watchlist number or negative error number.
130 */
131 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
132 mq_size, (u64)intr_mmr_offset,
133 (u64)&watchlist, 0);
134 if (ret < BIOS_STATUS_SUCCESS)
135 return ret;
136
137 return watchlist;
138}
139EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
140
141int
142uv_bios_mq_watchlist_free(int blade, int watchlist_num)
143{
144 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
145 blade, watchlist_num, 0, 0, 0);
146}
147EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
148
149s64
150uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
151{
152 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
153 perms, 0, 0);
154}
155EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
156
157s64
158uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
159{
160 return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
161 (u64)addr, buf, (u64)len, 0);
162}
163EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
164
165s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
166{
167 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
168 (u64)ticks_per_second, 0, 0, 0);
169}
170EXPORT_SYMBOL_GPL(uv_bios_freq_base);
171
172/*
173 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
174 * @decode: true to enable target, false to disable target
175 * @domain: PCI domain number
176 * @bus: PCI bus number
177 *
178 * Returns:
179 * 0: Success
180 * -EINVAL: Invalid domain or bus number
181 * -ENOSYS: Capability not available
182 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time
183 */
184int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
185{
186 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
187 (u64)decode, (u64)domain, (u64)bus, 0, 0);
188}
189EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
190
191#ifdef CONFIG_EFI
192void uv_bios_init(void)
193{
194 uv_systab = NULL;
195 if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
196 !efi.uv_systab || efi_runtime_disabled()) {
197 pr_crit("UV: UVsystab: missing\n");
198 return;
199 }
200
201 uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab));
202 if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
203 pr_err("UV: UVsystab: bad signature!\n");
204 iounmap(uv_systab);
205 return;
206 }
207
208 /* Starting with UV4 the UV systab size is variable */
209 if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
210 int size = uv_systab->size;
211
212 iounmap(uv_systab);
213 uv_systab = ioremap(efi.uv_systab, size);
214 if (!uv_systab) {
215 pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
216 return;
217 }
218 }
219 pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);
220}
221#endif