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
31int
32nv1a_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