1 /*
2 * Copyright 2013 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 * Authors: Ben Skeggs
23 */
24 #include "ram.h"
25
26 int
27 nv1a_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
28 {
29 struct pci_dev *bridge;
30 u32 mem, mib;
31 int domain = 0;
32 struct pci_dev *pdev = NULL;
33
34 if (dev_is_pci(fb->subdev.device->dev))
35 pdev = to_pci_dev(fb->subdev.device->dev);
36
37 if (pdev)
38 domain = pci_domain_nr(pdev->bus);
39
40 bridge = pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(0, 1));
41 if (!bridge) {
42 nvkm_error(&fb->subdev, "no bridge device\n");
43 return -ENODEV;
44 }
45
46 if (fb->subdev.device->chipset == 0x1a) {
47 pci_read_config_dword(bridge, 0x7c, &mem);
48 mib = ((mem >> 6) & 31) + 1;
49 } else {
50 pci_read_config_dword(bridge, 0x84, &mem);
51 mib = ((mem >> 4) & 127) + 1;
52 }
53
54 return nvkm_ram_new_(&nv04_ram_func, fb, NVKM_RAM_TYPE_STOLEN,
55 mib * 1024 * 1024, pram);
56 }