1/*
2 * Copyright 2015 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 <bskeggs@redhat.com>
23 */
24#include "priv.h"
25
26static void
27gf100_pci_msi_rearm(struct nvkm_pci *pci)
28{
29	nvkm_pci_wr08(pci, 0x0704, 0xff);
30}
31
32void
33gf100_pcie_set_version(struct nvkm_pci *pci, u8 ver)
34{
35	struct nvkm_device *device = pci->subdev.device;
36	nvkm_mask(device, 0x02241c, 0x1, ver > 1 ? 1 : 0);
37}
38
39int
40gf100_pcie_version(struct nvkm_pci *pci)
41{
42	struct nvkm_device *device = pci->subdev.device;
43	return (nvkm_rd32(device, 0x02241c) & 0x1) + 1;
44}
45
46void
47gf100_pcie_set_cap_speed(struct nvkm_pci *pci, bool full_speed)
48{
49	struct nvkm_device *device = pci->subdev.device;
50	nvkm_mask(device, 0x02241c, 0x80, full_speed ? 0x80 : 0x0);
51}
52
53int
54gf100_pcie_cap_speed(struct nvkm_pci *pci)
55{
56	struct nvkm_device *device = pci->subdev.device;
57	u8 punits_pci_cap_speed = nvkm_rd32(device, 0x02241c) & 0x80;
58	if (punits_pci_cap_speed == 0x80)
59		return 1;
60	return 0;
61}
62
63int
64gf100_pcie_init(struct nvkm_pci *pci)
65{
66	bool full_speed = g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0;
67	gf100_pcie_set_cap_speed(pci, full_speed);
68	return 0;
69}
70
71int
72gf100_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
73{
74	gf100_pcie_set_cap_speed(pci, speed == NVKM_PCIE_SPEED_5_0);
75	g84_pcie_set_link_speed(pci, speed);
76	return 0;
77}
78
79static const struct nvkm_pci_func
80gf100_pci_func = {
81	.init = g84_pci_init,
82	.rd32 = nv40_pci_rd32,
83	.wr08 = nv40_pci_wr08,
84	.wr32 = nv40_pci_wr32,
85	.msi_rearm = gf100_pci_msi_rearm,
86
87	.pcie.init = gf100_pcie_init,
88	.pcie.set_link = gf100_pcie_set_link,
89
90	.pcie.max_speed = g84_pcie_max_speed,
91	.pcie.cur_speed = g84_pcie_cur_speed,
92
93	.pcie.set_version = gf100_pcie_set_version,
94	.pcie.version = gf100_pcie_version,
95	.pcie.version_supported = g92_pcie_version_supported,
96};
97
98int
99gf100_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
100	      struct nvkm_pci **ppci)
101{
102	return nvkm_pci_new_(&gf100_pci_func, device, type, inst, ppci);
103}
104