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
nv1a_ram_new(struct nvkm_fb * fb,struct nvkm_ram ** pram)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 }
57