1 /* $NetBSD: nouveau_nvkm_subdev_bios_shadowrom.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 */
25 #include <sys/cdefs.h>
26 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_shadowrom.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
27
28 #include "priv.h"
29
30 #include <subdev/pci.h>
31
32 static u32
prom_read(void * data,u32 offset,u32 length,struct nvkm_bios * bios)33 prom_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
34 {
35 struct nvkm_device *device = data;
36 u32 i;
37 if (offset + length <= 0x00100000) {
38 for (i = offset; i < offset + length; i += 4)
39 *(u32 *)&bios->data[i] = nvkm_rd32(device, 0x300000 + i);
40 return length;
41 }
42 return 0;
43 }
44
45 static void
prom_fini(void * data)46 prom_fini(void *data)
47 {
48 struct nvkm_device *device = data;
49 nvkm_pci_rom_shadow(device->pci, true);
50 }
51
52 static void *
prom_init(struct nvkm_bios * bios,const char * name)53 prom_init(struct nvkm_bios *bios, const char *name)
54 {
55 struct nvkm_device *device = bios->subdev.device;
56 if (device->card_type == NV_40 && device->chipset >= 0x4c)
57 return ERR_PTR(-ENODEV);
58 nvkm_pci_rom_shadow(device->pci, false);
59 return device;
60 }
61
62 const struct nvbios_source
63 nvbios_rom = {
64 .name = "PROM",
65 .init = prom_init,
66 .fini = prom_fini,
67 .read = prom_read,
68 .rw = false,
69 };
70