Linux Kernel  3.7.1
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bios_uv.c
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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 <[email protected]>
20  */
21 
22 #include <linux/efi.h>
23 #include <linux/export.h>
24 #include <asm/efi.h>
25 #include <linux/io.h>
26 #include <asm/uv/bios.h>
27 #include <asm/uv/uv_hub.h>
28 
29 static struct uv_systab uv_systab;
30 
32 {
33  struct uv_systab *tab = &uv_systab;
34  s64 ret;
35 
36  if (!tab->function)
37  /*
38  * BIOS does not support UV systab
39  */
41 
42  ret = efi_call6((void *)__va(tab->function), (u64)which,
43  a1, a2, a3, a4, a5);
44  return ret;
45 }
47 
49  u64 a4, u64 a5)
50 {
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 
62  u64 a4, u64 a5)
63 {
64  s64 ret;
65 
67  ret = uv_bios_call(which, a1, a2, a3, a4, a5);
69 
70  return ret;
71 }
72 
73 
82 int uv_type;
84 
85 
86 s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
87  long *region, long *ssn)
88 {
89  s64 ret;
90  u64 v0, v1;
91  union partition_info_u part;
92 
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;
107  if (ssn)
108  *ssn = v1;
109  return ret;
110 }
112 
113 int
114 uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
115  unsigned long *intr_mmr_offset)
116 {
117  u64 watchlist;
118  s64 ret;
119 
120  /*
121  * bios returns watchlist number or negative error number.
122  */
124  mq_size, (u64)intr_mmr_offset,
125  (u64)&watchlist, 0);
126  if (ret < BIOS_STATUS_SUCCESS)
127  return ret;
128 
129  return watchlist;
130 }
132 
133 int
134 uv_bios_mq_watchlist_free(int blade, int watchlist_num)
135 {
137  blade, watchlist_num, 0, 0, 0);
138 }
140 
141 s64
143 {
144  return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
145  perms, 0, 0);
146 }
148 
149 s64
151 {
152  s64 ret;
153 
155  (u64)addr, buf, (u64)len, 0);
156  return ret;
157 }
159 
160 s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
161 {
162  return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
163  (u64)ticks_per_second, 0, 0, 0);
164 }
166 
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 {
182  (u64)decode, (u64)domain, (u64)bus, 0, 0);
183 }
185 
186 
187 #ifdef CONFIG_EFI
188 void uv_bios_init(void)
189 {
190  struct uv_systab *tab;
191 
193  (efi.uv_systab == (unsigned long)NULL)) {
194  printk(KERN_CRIT "No EFI UV System Table.\n");
195  uv_systab.function = (unsigned long)NULL;
196  return;
197  }
198 
199  tab = (struct uv_systab *)ioremap(efi.uv_systab,
200  sizeof(struct uv_systab));
201  if (strncmp(tab->signature, "UVST", 4) != 0)
202  printk(KERN_ERR "bad signature in UV system table!");
203 
204  /*
205  * Copy table to permanent spot for later use.
206  */
207  memcpy(&uv_systab, tab, sizeof(struct uv_systab));
208  iounmap(tab);
209 
210  printk(KERN_INFO "EFI UV System Table Revision %d\n",
212 }
213 #else /* !CONFIG_EFI */
214 
215 void uv_bios_init(void) { }
216 #endif