1 /*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 */
23 #include "priv.h"
24
25 struct priv {
26 struct nvkm_bios *bios;
27 u32 bar0;
28 };
29
30 static u32
31 pramin_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
32 {
33 struct nvkm_device *device = bios->subdev.device;
34 u32 i;
35 if (offset + length <= 0x00100000) {
36 for (i = offset; i < offset + length; i += 4)
37 *(u32 *)&bios->data[i] = nvkm_rd32(device, 0x700000 + i);
38 return length;
39 }
40 return 0;
41 }
42
43 static void
44 pramin_fini(void *data)
45 {
46 struct priv *priv = data;
47 if (priv) {
48 struct nvkm_device *device = priv->bios->subdev.device;
49 nvkm_wr32(device, 0x001700, priv->bar0);
50 kfree(priv);
51 }
52 }
53
54 static void *
55 pramin_init(struct nvkm_bios *bios, const char *name)
56 {
57 struct nvkm_subdev *subdev = &bios->subdev;
58 struct nvkm_device *device = subdev->device;
59 struct priv *priv = NULL;
60 u64 addr = 0;
61
62 /* PRAMIN always potentially available prior to nv50 */
63 if (device->card_type < NV_50)
64 return NULL;
65
66 /* we can't get the bios image pointer without PDISP */
67 if (device->card_type >= GM100)
68 addr = nvkm_rd32(device, 0x021c04);
69 else
70 if (device->card_type >= NV_C0)
71 addr = nvkm_rd32(device, 0x022500);
72 if (addr & 0x00000001) {
73 nvkm_debug(subdev, "... display disabled\n");
74 return ERR_PTR(-ENODEV);
75 }
76
77 /* check that the window is enabled and in vram, particularly
78 * important as we don't want to be touching vram on an
79 * uninitialised board
80 */
81 if (device->card_type >= GV100)
82 addr = nvkm_rd32(device, 0x625f04);
83 else
84 addr = nvkm_rd32(device, 0x619f04);
85 if (!(addr & 0x00000008)) {
86 nvkm_debug(subdev, "... not enabled\n");
87 return ERR_PTR(-ENODEV);
88 }
89 if ( (addr & 0x00000003) != 1) {
90 nvkm_debug(subdev, "... not in vram\n");
91 return ERR_PTR(-ENODEV);
92 }
93
94 /* some alternate method inherited from xf86-video-nv... */
95 addr = (addr & 0xffffff00) << 8;
96 if (!addr) {
97 addr = (u64)nvkm_rd32(device, 0x001700) << 16;
98 addr += 0xf0000;
99 }
100
101 /* modify bar0 PRAMIN window to cover the bios image */
102 if (!(priv = kmalloc(sizeof(*priv), GFP_KERNEL))) {
103 nvkm_error(subdev, "... out of memory\n");
104 return ERR_PTR(-ENOMEM);
105 }
106
107 priv->bios = bios;
108 priv->bar0 = nvkm_rd32(device, 0x001700);
109 nvkm_wr32(device, 0x001700, addr >> 16);
110 return priv;
111 }
112
113 const struct nvbios_source
114 nvbios_ramin = {
115 .name = "PRAMIN",
116 .init = pramin_init,
117 .fini = pramin_fini,
118 .read = pramin_read,
119 .rw = true,
120 };