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
31 u32
nvkm_pci_rd32(struct nvkm_pci * pci,u16 addr)32 nvkm_pci_rd32(struct nvkm_pci *pci, u16 addr)
33 {
34 return pci->func->rd32(pci, addr);
35 }
36
37 void
nvkm_pci_wr08(struct nvkm_pci * pci,u16 addr,u8 data)38 nvkm_pci_wr08(struct nvkm_pci *pci, u16 addr, u8 data)
39 {
40 pci->func->wr08(pci, addr, data);
41 }
42
43 void
nvkm_pci_wr32(struct nvkm_pci * pci,u16 addr,u32 data)44 nvkm_pci_wr32(struct nvkm_pci *pci, u16 addr, u32 data)
45 {
46 pci->func->wr32(pci, addr, data);
47 }
48
49 u32
nvkm_pci_mask(struct nvkm_pci * pci,u16 addr,u32 mask,u32 value)50 nvkm_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
57 void
nvkm_pci_rom_shadow(struct nvkm_pci * pci,bool shadow)58 nvkm_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
68 static irqreturn_t
nvkm_pci_intr(int irq,void * arg)69 nvkm_pci_intr(int irq, void *arg)
70 {
71 struct nvkm_pci *pci = arg;
72 struct nvkm_device *device = pci->subdev.device;
73 bool handled = false;
74 nvkm_mc_intr_unarm(device);
75 if (pci->msi)
76 pci->func->msi_rearm(pci);
77 nvkm_mc_intr(device, &handled);
78 nvkm_mc_intr_rearm(device);
79 return handled ? IRQ_HANDLED : IRQ_NONE;
80 }
81
82 static int
nvkm_pci_fini(struct nvkm_subdev * subdev,bool suspend)83 nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
84 {
85 struct nvkm_pci *pci = nvkm_pci(subdev);
86
87 if (pci->irq >= 0) {
88 free_irq(pci->irq, pci);
89 pci->irq = -1;
90 };
91
92 if (pci->agp.bridge)
93 nvkm_agp_fini(pci);
94
95 return 0;
96 }
97
98 static int
nvkm_pci_preinit(struct nvkm_subdev * subdev)99 nvkm_pci_preinit(struct nvkm_subdev *subdev)
100 {
101 struct nvkm_pci *pci = nvkm_pci(subdev);
102 if (pci->agp.bridge)
103 nvkm_agp_preinit(pci);
104 return 0;
105 }
106
107 static int
nvkm_pci_oneinit(struct nvkm_subdev * subdev)108 nvkm_pci_oneinit(struct nvkm_subdev *subdev)
109 {
110 struct nvkm_pci *pci = nvkm_pci(subdev);
111 if (pci_is_pcie(pci->pdev))
112 return nvkm_pcie_oneinit(pci);
113 return 0;
114 }
115
116 static int
nvkm_pci_init(struct nvkm_subdev * subdev)117 nvkm_pci_init(struct nvkm_subdev *subdev)
118 {
119 struct nvkm_pci *pci = nvkm_pci(subdev);
120 struct pci_dev *pdev = pci->pdev;
121 int ret;
122
123 if (pci->agp.bridge) {
124 ret = nvkm_agp_init(pci);
125 if (ret)
126 return ret;
127 } else if (pci_is_pcie(pci->pdev)) {
128 nvkm_pcie_init(pci);
129 }
130
131 if (pci->func->init)
132 pci->func->init(pci);
133
134 ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci);
135 if (ret)
136 return ret;
137
138 pci->irq = pdev->irq;
139
140 /* Ensure MSI interrupts are armed, for the case where there are
141 * already interrupts pending (for whatever reason) at load time.
142 */
143 if (pci->msi)
144 pci->func->msi_rearm(pci);
145
146 return ret;
147 }
148
149 static void *
nvkm_pci_dtor(struct nvkm_subdev * subdev)150 nvkm_pci_dtor(struct nvkm_subdev *subdev)
151 {
152 struct nvkm_pci *pci = nvkm_pci(subdev);
153 nvkm_agp_dtor(pci);
154 if (pci->msi)
155 pci_disable_msi(pci->pdev);
156 return nvkm_pci(subdev);
157 }
158
159 static const struct nvkm_subdev_func
160 nvkm_pci_func = {
161 .dtor = nvkm_pci_dtor,
162 .oneinit = nvkm_pci_oneinit,
163 .preinit = nvkm_pci_preinit,
164 .init = nvkm_pci_init,
165 .fini = nvkm_pci_fini,
166 };
167
168 int
nvkm_pci_new_(const struct nvkm_pci_func * func,struct nvkm_device * device,int index,struct nvkm_pci ** ppci)169 nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
170 int index, struct nvkm_pci **ppci)
171 {
172 struct nvkm_pci *pci;
173
174 if (!(pci = *ppci = kzalloc(sizeof(**ppci), GFP_KERNEL)))
175 return -ENOMEM;
176 nvkm_subdev_ctor(&nvkm_pci_func, device, index, &pci->subdev);
177 pci->func = func;
178 pci->pdev = device->func->pci(device)->pdev;
179 pci->irq = -1;
180 pci->pcie.speed = -1;
181 pci->pcie.width = -1;
182
183 if (device->type == NVKM_DEVICE_AGP)
184 nvkm_agp_ctor(pci);
185
186 switch (pci->pdev->device & 0x0ff0) {
187 case 0x00f0:
188 case 0x02e0:
189 /* BR02? NFI how these would be handled yet exactly */
190 break;
191 default:
192 switch (device->chipset) {
193 case 0xaa:
194 /* reported broken, nv also disable it */
195 break;
196 default:
197 pci->msi = true;
198 break;
199 }
200 }
201
202 #ifdef __BIG_ENDIAN
203 pci->msi = false;
204 #endif
205
206 pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi);
207 if (pci->msi && func->msi_rearm) {
208 pci->msi = pci_enable_msi(pci->pdev) == 0;
209 if (pci->msi)
210 nvkm_debug(&pci->subdev, "MSI enabled\n");
211 } else {
212 pci->msi = false;
213 }
214
215 return 0;
216 }
217