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#include "agp.h"
26
27#include <core/option.h>
28#include <core/pci.h>
29#include <subdev/mc.h>
30
31u32
32nvkm_pci_rd32(struct nvkm_pci *pci, u16 addr)
33{
34	return pci->func->rd32(pci, addr);
35}
36
37void
38nvkm_pci_wr08(struct nvkm_pci *pci, u16 addr, u8 data)
39{
40	pci->func->wr08(pci, addr, data);
41}
42
43void
44nvkm_pci_wr32(struct nvkm_pci *pci, u16 addr, u32 data)
45{
46	pci->func->wr32(pci, addr, data);
47}
48
49u32
50nvkm_pci_mask(struct nvkm_pci *pci, u16 addr, u32 mask, u32 value)
51{
52	u32 data = pci->func->rd32(pci, addr);
53	pci->func->wr32(pci, addr, (data & ~mask) | value);
54	return data;
55}
56
57void
58nvkm_pci_rom_shadow(struct nvkm_pci *pci, bool shadow)
59{
60	u32 data = nvkm_pci_rd32(pci, 0x0050);
61	if (shadow)
62		data |=  0x00000001;
63	else
64		data &= ~0x00000001;
65	nvkm_pci_wr32(pci, 0x0050, data);
66}
67
68static irqreturn_t
69nvkm_pci_intr(int irq, void *arg)
70{
71	struct nvkm_pci *pci = arg;
72	struct nvkm_mc *mc = pci->subdev.device->mc;
73	bool handled = false;
74	if (likely(mc)) {
75		nvkm_mc_intr_unarm(mc);
76		if (pci->msi)
77			pci->func->msi_rearm(pci);
78		nvkm_mc_intr(mc, &handled);
79		nvkm_mc_intr_rearm(mc);
80	}
81	return handled ? IRQ_HANDLED : IRQ_NONE;
82}
83
84static int
85nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
86{
87	struct nvkm_pci *pci = nvkm_pci(subdev);
88
89	if (pci->irq >= 0) {
90		free_irq(pci->irq, pci);
91		pci->irq = -1;
92	};
93
94	if (pci->agp.bridge)
95		nvkm_agp_fini(pci);
96
97	return 0;
98}
99
100static int
101nvkm_pci_preinit(struct nvkm_subdev *subdev)
102{
103	struct nvkm_pci *pci = nvkm_pci(subdev);
104	if (pci->agp.bridge)
105		nvkm_agp_preinit(pci);
106	return 0;
107}
108
109static int
110nvkm_pci_init(struct nvkm_subdev *subdev)
111{
112	struct nvkm_pci *pci = nvkm_pci(subdev);
113	struct pci_dev *pdev = pci->pdev;
114	int ret;
115
116	if (pci->agp.bridge) {
117		ret = nvkm_agp_init(pci);
118		if (ret)
119			return ret;
120	}
121
122	if (pci->func->init)
123		pci->func->init(pci);
124
125	ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci);
126	if (ret)
127		return ret;
128
129	pci->irq = pdev->irq;
130	return ret;
131}
132
133static void *
134nvkm_pci_dtor(struct nvkm_subdev *subdev)
135{
136	struct nvkm_pci *pci = nvkm_pci(subdev);
137	nvkm_agp_dtor(pci);
138	if (pci->msi)
139		pci_disable_msi(pci->pdev);
140	return nvkm_pci(subdev);
141}
142
143static const struct nvkm_subdev_func
144nvkm_pci_func = {
145	.dtor = nvkm_pci_dtor,
146	.preinit = nvkm_pci_preinit,
147	.init = nvkm_pci_init,
148	.fini = nvkm_pci_fini,
149};
150
151int
152nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
153	      int index, struct nvkm_pci **ppci)
154{
155	struct nvkm_pci *pci;
156
157	if (!(pci = *ppci = kzalloc(sizeof(**ppci), GFP_KERNEL)))
158		return -ENOMEM;
159	nvkm_subdev_ctor(&nvkm_pci_func, device, index, 0, &pci->subdev);
160	pci->func = func;
161	pci->pdev = device->func->pci(device)->pdev;
162	pci->irq = -1;
163
164	if (device->type == NVKM_DEVICE_AGP)
165		nvkm_agp_ctor(pci);
166
167	switch (pci->pdev->device & 0x0ff0) {
168	case 0x00f0:
169	case 0x02e0:
170		/* BR02? NFI how these would be handled yet exactly */
171		break;
172	default:
173		switch (device->chipset) {
174		case 0xaa:
175			/* reported broken, nv also disable it */
176			break;
177		default:
178			pci->msi = true;
179			break;
180		}
181	}
182
183	pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi);
184	if (pci->msi && func->msi_rearm) {
185		pci->msi = pci_enable_msi(pci->pdev) == 0;
186		if (pci->msi)
187			nvkm_debug(&pci->subdev, "MSI enabled\n");
188	} else {
189		pci->msi = false;
190	}
191
192	return 0;
193}
194