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 
30 void
31 nvkm_pci_msi_rearm(struct nvkm_device *device)
32 {
33 	struct nvkm_pci *pci = device->pci;
34 
35 	if (pci && pci->msi)
36 		pci->func->msi_rearm(pci);
37 }
38 
39 u32
40 nvkm_pci_rd32(struct nvkm_pci *pci, u16 addr)
41 {
42 	return pci->func->rd32(pci, addr);
43 }
44 
45 void
46 nvkm_pci_wr08(struct nvkm_pci *pci, u16 addr, u8 data)
47 {
48 	pci->func->wr08(pci, addr, data);
49 }
50 
51 void
52 nvkm_pci_wr32(struct nvkm_pci *pci, u16 addr, u32 data)
53 {
54 	pci->func->wr32(pci, addr, data);
55 }
56 
57 u32
58 nvkm_pci_mask(struct nvkm_pci *pci, u16 addr, u32 mask, u32 value)
59 {
60 	u32 data = pci->func->rd32(pci, addr);
61 	pci->func->wr32(pci, addr, (data & ~mask) | value);
62 	return data;
63 }
64 
65 void
66 nvkm_pci_rom_shadow(struct nvkm_pci *pci, bool shadow)
67 {
68 	u32 data = nvkm_pci_rd32(pci, 0x0050);
69 	if (shadow)
70 		data |=  0x00000001;
71 	else
72 		data &= ~0x00000001;
73 	nvkm_pci_wr32(pci, 0x0050, data);
74 }
75 
76 static int
77 nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
78 {
79 	struct nvkm_pci *pci = nvkm_pci(subdev);
80 
81 	if (pci->agp.bridge)
82 		nvkm_agp_fini(pci);
83 
84 	return 0;
85 }
86 
87 static int
88 nvkm_pci_preinit(struct nvkm_subdev *subdev)
89 {
90 	struct nvkm_pci *pci = nvkm_pci(subdev);
91 	if (pci->agp.bridge)
92 		nvkm_agp_preinit(pci);
93 	return 0;
94 }
95 
96 static int
97 nvkm_pci_oneinit(struct nvkm_subdev *subdev)
98 {
99 	struct nvkm_pci *pci = nvkm_pci(subdev);
100 	int ret;
101 
102 	if (pci_is_pcie(pci->pdev)) {
103 		ret = nvkm_pcie_oneinit(pci);
104 		if (ret)
105 			return ret;
106 	}
107 
108 	return 0;
109 }
110 
111 static int
112 nvkm_pci_init(struct nvkm_subdev *subdev)
113 {
114 	struct nvkm_pci *pci = nvkm_pci(subdev);
115 	int ret;
116 
117 	if (pci->agp.bridge) {
118 		ret = nvkm_agp_init(pci);
119 		if (ret)
120 			return ret;
121 	} else if (pci_is_pcie(pci->pdev)) {
122 		nvkm_pcie_init(pci);
123 	}
124 
125 	if (pci->func->init)
126 		pci->func->init(pci);
127 
128 	/* Ensure MSI interrupts are armed, for the case where there are
129 	 * already interrupts pending (for whatever reason) at load time.
130 	 */
131 	if (pci->msi)
132 		pci->func->msi_rearm(pci);
133 
134 	return 0;
135 }
136 
137 static void *
138 nvkm_pci_dtor(struct nvkm_subdev *subdev)
139 {
140 	struct nvkm_pci *pci = nvkm_pci(subdev);
141 
142 	nvkm_agp_dtor(pci);
143 
144 	if (pci->msi)
145 		pci_disable_msi(pci->pdev);
146 
147 	return nvkm_pci(subdev);
148 }
149 
150 static const struct nvkm_subdev_func
151 nvkm_pci_func = {
152 	.dtor = nvkm_pci_dtor,
153 	.oneinit = nvkm_pci_oneinit,
154 	.preinit = nvkm_pci_preinit,
155 	.init = nvkm_pci_init,
156 	.fini = nvkm_pci_fini,
157 };
158 
159 int
160 nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
161 	      enum nvkm_subdev_type type, int inst, struct nvkm_pci **ppci)
162 {
163 	struct nvkm_pci *pci;
164 
165 	if (!(pci = *ppci = kzalloc(sizeof(**ppci), GFP_KERNEL)))
166 		return -ENOMEM;
167 	nvkm_subdev_ctor(&nvkm_pci_func, device, type, inst, &pci->subdev);
168 	pci->func = func;
169 	pci->pdev = device->func->pci(device)->pdev;
170 	pci->pcie.speed = -1;
171 	pci->pcie.width = -1;
172 
173 	if (device->type == NVKM_DEVICE_AGP)
174 		nvkm_agp_ctor(pci);
175 
176 	switch (pci->pdev->device & 0x0ff0) {
177 	case 0x00f0:
178 	case 0x02e0:
179 		/* BR02? NFI how these would be handled yet exactly */
180 		break;
181 	default:
182 		switch (device->chipset) {
183 		case 0xaa:
184 			/* reported broken, nv also disable it */
185 			break;
186 		default:
187 			pci->msi = true;
188 			break;
189 		}
190 	}
191 
192 #ifdef __BIG_ENDIAN
193 	pci->msi = false;
194 #endif
195 
196 	pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi);
197 	if (pci->msi && func->msi_rearm) {
198 		pci->msi = pci_enable_msi(pci->pdev) == 0;
199 		if (pci->msi)
200 			nvkm_debug(&pci->subdev, "MSI enabled\n");
201 	} else {
202 		pci->msi = false;
203 	}
204 
205 	return 0;
206 }
207