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x86/sysfb_efi: Fix valid BAR address range check
[deliverable/linux.git] / arch / x86 / kernel / sysfb_efi.c
CommitLineData
2995e506
DH		 1/*
2 * Generic System Framebuffers on x86
3 * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@gmail.com>
4 *
5 * EFI Quirks Copyright (c) 2006 Edgar Hucek <gimli@dark-green.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 */
12
13/*
14 * EFI Quirks
15 * Several EFI systems do not correctly advertise their boot framebuffers.
16 * Hence, we use this static table of known broken machines and fix up the
17 * information so framebuffer drivers can load corectly.
18 */
19
20#include <linux/dmi.h>
21#include <linux/err.h>
22#include <linux/init.h>
23#include <linux/kernel.h>
24#include <linux/mm.h>
25#include <linux/pci.h>
26#include <linux/screen_info.h>
27#include <video/vga.h>
28#include <asm/sysfb.h>
29
30enum {
31 OVERRIDE_NONE = 0x0,
32 OVERRIDE_BASE = 0x1,
33 OVERRIDE_STRIDE = 0x2,
34 OVERRIDE_HEIGHT = 0x4,
35 OVERRIDE_WIDTH = 0x8,
36};
37
38struct efifb_dmi_info efifb_dmi_list[] = {
39 [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
40 [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
41 [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
42 [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
43 [M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
44 [M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
45 [M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
46 [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
47 [M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
48 [M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
49 [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
50 [M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
51 [M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
52 [M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
53 [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
54 /* 11" Macbook Air 3,1 passes the wrong stride */
55 [M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },
56 [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
57 [M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
58 [M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
59 [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
60 [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
61 [M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
62 [M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
63 [M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
64 [M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
65 [M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
66 [M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
67 [M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
68 [M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
69};
70
71#define choose_value(dmivalue, fwvalue, field, flags) ({ \
72 typeof(fwvalue) _ret_ = fwvalue; \
73 if ((flags) & (field)) \
74 _ret_ = dmivalue; \
75 else if ((fwvalue) == 0) \
76 _ret_ = dmivalue; \
77 _ret_; \
78 })
79
80static int __init efifb_set_system(const struct dmi_system_id *id)
81{
82 struct efifb_dmi_info *info = id->driver_data;
83
84 if (info->base == 0 && info->height == 0 && info->width == 0 &&
85 info->stride == 0)
86 return 0;
87
88 /* Trust the bootloader over the DMI tables */
89 if (screen_info.lfb_base == 0) {
90#if defined(CONFIG_PCI)
91 struct pci_dev *dev = NULL;
92 int found_bar = 0;
93#endif
94 if (info->base) {
95 screen_info.lfb_base = choose_value(info->base,
96 screen_info.lfb_base, OVERRIDE_BASE,
97 info->flags);
98
99#if defined(CONFIG_PCI)
100 /* make sure that the address in the table is actually
101 * on a VGA device's PCI BAR */
102
103 for_each_pci_dev(dev) {
104 int i;
105 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
106 continue;
107 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
108 resource_size_t start, end;
c10fcb14
WY		 109 unsigned long flags;
110
111 flags = pci_resource_flags(dev, i);
112 if (!(flags & IORESOURCE_MEM))
113 continue;
114
115 if (flags & IORESOURCE_UNSET)
116 continue;
117
118 if (pci_resource_len(dev, i) == 0)
119 continue;
2995e506
DH		 120
121 start = pci_resource_start(dev, i);
2995e506
DH		 122 end = pci_resource_end(dev, i);
123 if (screen_info.lfb_base >= start &&
124 screen_info.lfb_base < end) {
125 found_bar = 1;
c10fcb14 126 break;
2995e506
DH		 127 }
128 }
129 }
130 if (!found_bar)
131 screen_info.lfb_base = 0;
132#endif
133 }
134 }
135 if (screen_info.lfb_base) {
136 screen_info.lfb_linelength = choose_value(info->stride,
137 screen_info.lfb_linelength, OVERRIDE_STRIDE,
138 info->flags);
139 screen_info.lfb_width = choose_value(info->width,
140 screen_info.lfb_width, OVERRIDE_WIDTH,
141 info->flags);
142 screen_info.lfb_height = choose_value(info->height,
143 screen_info.lfb_height, OVERRIDE_HEIGHT,
144 info->flags);
145 if (screen_info.orig_video_isVGA == 0)
146 screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
147 } else {
148 screen_info.lfb_linelength = 0;
149 screen_info.lfb_width = 0;
150 screen_info.lfb_height = 0;
151 screen_info.orig_video_isVGA = 0;
152 return 0;
153 }
154
155 printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
156 "(%dx%d, stride %d)\n", id->ident,
157 screen_info.lfb_base, screen_info.lfb_width,
158 screen_info.lfb_height, screen_info.lfb_linelength);
159
160 return 1;
161}
162
163#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
164 { \
165 efifb_set_system, \
166 name, \
167 { \
168 DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
169 DMI_MATCH(DMI_PRODUCT_NAME, name) \
170 }, \
171 &efifb_dmi_list[enumid] \
172 }
173
174static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
175 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
176 /* At least one of these two will be right; maybe both? */
177 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
178 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
179 /* At least one of these two will be right; maybe both? */
180 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
181 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
182 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
183 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
184 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
185 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
186 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
187 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
188 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
189 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
190 /* At least one of these two will be right; maybe both? */
191 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
192 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
193 /* At least one of these two will be right; maybe both? */
194 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
195 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
196 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
197 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
198 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
199 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
200 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
201 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
202 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
203 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
204 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
205 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
206 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
207 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
208 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
209 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
210 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
211 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
212 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
213 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
214 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
215 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
216 {},
217};
218
219__init void sysfb_apply_efi_quirks(void)
220{
221 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
222 !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
223 dmi_check_system(efifb_dmi_system_table);
224}
Linux kernel - Deliverables
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