1 /* $NetBSD: nouveau_nvkm_subdev_pci_base.c,v 1.11 2021/12/19 12:43:45 riastradh Exp $ */
2
3 /*
4 * Copyright 2015 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_pci_base.c,v 1.11 2021/12/19 12:43:45 riastradh Exp $");
28
29 #include "priv.h"
30 #include "agp.h"
31
32 #include <core/option.h>
33 #include <core/pci.h>
34 #include <subdev/mc.h>
35
36 u32
nvkm_pci_rd32(struct nvkm_pci * pci,u16 addr)37 nvkm_pci_rd32(struct nvkm_pci *pci, u16 addr)
38 {
39 return pci->func->rd32(pci, addr);
40 }
41
42 void
nvkm_pci_wr08(struct nvkm_pci * pci,u16 addr,u8 data)43 nvkm_pci_wr08(struct nvkm_pci *pci, u16 addr, u8 data)
44 {
45 pci->func->wr08(pci, addr, data);
46 }
47
48 void
nvkm_pci_wr32(struct nvkm_pci * pci,u16 addr,u32 data)49 nvkm_pci_wr32(struct nvkm_pci *pci, u16 addr, u32 data)
50 {
51 pci->func->wr32(pci, addr, data);
52 }
53
54 u32
nvkm_pci_mask(struct nvkm_pci * pci,u16 addr,u32 mask,u32 value)55 nvkm_pci_mask(struct nvkm_pci *pci, u16 addr, u32 mask, u32 value)
56 {
57 u32 data = pci->func->rd32(pci, addr);
58 pci->func->wr32(pci, addr, (data & ~mask) | value);
59 return data;
60 }
61
62 void
nvkm_pci_rom_shadow(struct nvkm_pci * pci,bool shadow)63 nvkm_pci_rom_shadow(struct nvkm_pci *pci, bool shadow)
64 {
65 u32 data = nvkm_pci_rd32(pci, 0x0050);
66 if (shadow)
67 data |= 0x00000001;
68 else
69 data &= ~0x00000001;
70 nvkm_pci_wr32(pci, 0x0050, data);
71 }
72
73 static irqreturn_t
nvkm_pci_intr(DRM_IRQ_ARGS)74 nvkm_pci_intr(DRM_IRQ_ARGS)
75 {
76 struct nvkm_pci *pci = arg;
77 struct nvkm_device *device = pci->subdev.device;
78 bool handled = false;
79
80 #ifndef __NetBSD__
81 if (pci->irq < 0)
82 return IRQ_HANDLED;
83 #endif
84
85 nvkm_mc_intr_unarm(device);
86 if (pci->msi)
87 pci->func->msi_rearm(pci);
88 nvkm_mc_intr(device, &handled);
89 nvkm_mc_intr_rearm(device);
90 return handled ? IRQ_HANDLED : IRQ_NONE;
91 }
92
93 static int
nvkm_pci_fini(struct nvkm_subdev * subdev,bool suspend)94 nvkm_pci_fini(struct nvkm_subdev *subdev, bool suspend)
95 {
96 struct nvkm_pci *pci = nvkm_pci(subdev);
97
98 if (pci->agp.bridge)
99 nvkm_agp_fini(pci);
100
101 return 0;
102 }
103
104 static int
nvkm_pci_preinit(struct nvkm_subdev * subdev)105 nvkm_pci_preinit(struct nvkm_subdev *subdev)
106 {
107 struct nvkm_pci *pci = nvkm_pci(subdev);
108 if (pci->agp.bridge)
109 nvkm_agp_preinit(pci);
110 return 0;
111 }
112
113 static int
nvkm_pci_oneinit(struct nvkm_subdev * subdev)114 nvkm_pci_oneinit(struct nvkm_subdev *subdev)
115 {
116 struct nvkm_pci *pci = nvkm_pci(subdev);
117 struct pci_dev *pdev = pci->pdev;
118 int ret;
119
120 if (pci_is_pcie(pci->pdev)) {
121 ret = nvkm_pcie_oneinit(pci);
122 if (ret)
123 return ret;
124 }
125
126 #ifdef __NetBSD__
127 {
128 const char *const name = device_xname(pci_dev_dev(pdev));
129 const struct pci_attach_args *pa = &pdev->pd_pa;
130 const char *intrstr;
131 char intrbuf[PCI_INTRSTR_LEN];
132
133 if (pdev->msi_enabled) {
134 if (pdev->pd_intr_handles == NULL) {
135 if ((ret = pci_msi_alloc_exact(pa, &pci->pci_ihp,
136 1))) {
137 aprint_error_dev(pci_dev_dev(pdev),
138 "couldn't allocate MSI (%s)\n", name);
139 /* XXX errno NetBSD->Linux */
140 return -ret;
141 }
142 } else {
143 pci->pci_ihp = pdev->pd_intr_handles;
144 pdev->pd_intr_handles = NULL;
145 }
146 } else {
147 if ((ret = pci_intx_alloc(pa, &pci->pci_ihp))) {
148 aprint_error_dev(pci_dev_dev(pdev),
149 "couldn't allocate INTx interrupt (%s)\n",
150 name);
151
152 /* XXX errno NetBSD->Linux */
153 return -ret;
154 }
155 }
156
157 intrstr = pci_intr_string(pa->pa_pc, pci->pci_ihp[0],
158 intrbuf, sizeof(intrbuf));
159 pci->pci_intrcookie = pci_intr_establish_xname(pa->pa_pc,
160 pci->pci_ihp[0], IPL_DRM, nvkm_pci_intr, pci,
161 name);
162 if (pci->pci_intrcookie == NULL) {
163 aprint_error_dev(pci_dev_dev(pdev),
164 "couldn't establish interrupt at %s (%s)\n", intrstr, name);
165 pci_intr_release(pa->pa_pc, pci->pci_ihp, 1);
166 pci->pci_ihp = NULL;
167 return -EIO; /* XXX er? */
168 }
169
170 aprint_normal_dev(pci_dev_dev(pdev), "interrupting at %s (%s)\n",
171 intrstr, name);
172 }
173 #else
174 ret = request_irq(pdev->irq, nvkm_pci_intr, IRQF_SHARED, "nvkm", pci);
175 if (ret)
176 return ret;
177
178 pci->irq = pdev->irq;
179 #endif
180 return 0;
181 }
182
183 static int
nvkm_pci_init(struct nvkm_subdev * subdev)184 nvkm_pci_init(struct nvkm_subdev *subdev)
185 {
186 struct nvkm_pci *pci = nvkm_pci(subdev);
187 int ret;
188
189 if (pci->agp.bridge) {
190 ret = nvkm_agp_init(pci);
191 if (ret)
192 return ret;
193 } else if (pci_is_pcie(pci->pdev)) {
194 nvkm_pcie_init(pci);
195 }
196
197 if (pci->func->init)
198 pci->func->init(pci);
199
200 /* Ensure MSI interrupts are armed, for the case where there are
201 * already interrupts pending (for whatever reason) at load time.
202 */
203 if (pci->msi)
204 pci->func->msi_rearm(pci);
205
206 return 0;
207 }
208
209 static void *
nvkm_pci_dtor(struct nvkm_subdev * subdev)210 nvkm_pci_dtor(struct nvkm_subdev *subdev)
211 {
212 struct nvkm_pci *pci = nvkm_pci(subdev);
213
214 nvkm_agp_dtor(pci);
215
216 #ifdef __NetBSD__
217 const struct pci_attach_args *pa = &pci->pdev->pd_pa;
218 if (pci->pci_intrcookie != NULL) {
219 pci_intr_disestablish(pa->pa_pc, pci->pci_intrcookie);
220 pci->pci_intrcookie = NULL;
221 }
222 if (pci->pci_ihp != NULL) {
223 pci_intr_release(pa->pa_pc, pci->pci_ihp, 1);
224 pci->pci_ihp = NULL;
225 }
226 #else
227 if (pci->irq >= 0) {
228 /* freq_irq() will call the handler, we use pci->irq == -1
229 * to signal that it's been torn down and should be a noop.
230 */
231 int irq = pci->irq;
232 pci->irq = -1;
233 free_irq(irq, pci);
234 }
235 #endif
236
237 if (pci->msi)
238 pci_disable_msi(pci->pdev);
239
240 return nvkm_pci(subdev);
241 }
242
243 static const struct nvkm_subdev_func
244 nvkm_pci_func = {
245 .dtor = nvkm_pci_dtor,
246 .oneinit = nvkm_pci_oneinit,
247 .preinit = nvkm_pci_preinit,
248 .init = nvkm_pci_init,
249 .fini = nvkm_pci_fini,
250 };
251
252 int
nvkm_pci_new_(const struct nvkm_pci_func * func,struct nvkm_device * device,int index,struct nvkm_pci ** ppci)253 nvkm_pci_new_(const struct nvkm_pci_func *func, struct nvkm_device *device,
254 int index, struct nvkm_pci **ppci)
255 {
256 struct nvkm_pci *pci;
257
258 if (!(pci = *ppci = kzalloc(sizeof(**ppci), GFP_KERNEL)))
259 return -ENOMEM;
260 nvkm_subdev_ctor(&nvkm_pci_func, device, index, &pci->subdev);
261 pci->func = func;
262 pci->pdev = device->func->pci(device)->pdev;
263 #ifndef __NetBSD__
264 pci->irq = -1;
265 #endif
266 pci->pcie.speed = -1;
267 pci->pcie.width = -1;
268
269 if (device->type == NVKM_DEVICE_AGP)
270 nvkm_agp_ctor(pci);
271
272 switch (pci->pdev->device & 0x0ff0) {
273 case 0x00f0:
274 case 0x02e0:
275 /* BR02? NFI how these would be handled yet exactly */
276 break;
277 default:
278 switch (device->chipset) {
279 case 0x84: /* G84, no mode switch with MSI */
280 case 0xaa:
281 /* reported broken, nv also disable it */
282 break;
283 default:
284 pci->msi = true;
285 break;
286 }
287 }
288
289 #ifdef __BIG_ENDIAN
290 pci->msi = false;
291 #endif
292
293 pci->msi = nvkm_boolopt(device->cfgopt, "NvMSI", pci->msi);
294 if (pci->msi && func->msi_rearm) {
295 pci->msi = pci_enable_msi(pci->pdev) == 0;
296 if (pci->msi)
297 nvkm_debug(&pci->subdev, "MSI enabled\n");
298 } else {
299 pci->msi = false;
300 }
301
302 return 0;
303 }
304