1 /* $NetBSD: nouveau_nvkm_subdev_fb_ramnv1a.c,v 1.4 2021/12/19 10:51:58 riastradh Exp $ */
2
3 /*
4 * Copyright 2013 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 * Authors: Ben Skeggs
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_fb_ramnv1a.c,v 1.4 2021/12/19 10:51:58 riastradh Exp $");
28
29 #include "ram.h"
30
31 int
nv1a_ram_new(struct nvkm_fb * fb,struct nvkm_ram ** pram)32 nv1a_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
33 {
34 #ifdef __NetBSD__ /* XXX pci */
35 return -ENODEV;
36 #else
37 struct pci_dev *bridge;
38 u32 mem, mib;
39 int domain = 0;
40 struct pci_dev *pdev = NULL;
41
42 if (dev_is_pci(fb->subdev.device->dev))
43 pdev = to_pci_dev(fb->subdev.device->dev);
44
45 if (pdev)
46 domain = pci_domain_nr(pdev->bus);
47
48 bridge = pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(0, 1));
49 if (!bridge) {
50 nvkm_error(&fb->subdev, "no bridge device\n");
51 return -ENODEV;
52 }
53
54 if (fb->subdev.device->chipset == 0x1a) {
55 pci_read_config_dword(bridge, 0x7c, &mem);
56 mib = ((mem >> 6) & 31) + 1;
57 } else {
58 pci_read_config_dword(bridge, 0x84, &mem);
59 mib = ((mem >> 4) & 127) + 1;
60 }
61
62 return nvkm_ram_new_(&nv04_ram_func, fb, NVKM_RAM_TYPE_STOLEN,
63 mib * 1024 * 1024, pram);
64 #endif
65 }
66