Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / subdev / pmu / base.c
1 /*
2  * Copyright 2013 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
23  */
24 #include "priv.h"
25
26 #include <subdev/timer.h>
27
28 void
29 nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
30 {
31         const struct nvkm_pmu_impl *impl = (void *)nv_oclass(pmu);
32         if (impl->pgob)
33                 impl->pgob(pmu, enable);
34 }
35
36 static int
37 nvkm_pmu_send(struct nvkm_pmu *pmu, u32 reply[2],
38               u32 process, u32 message, u32 data0, u32 data1)
39 {
40         struct nvkm_subdev *subdev = nv_subdev(pmu);
41         u32 addr;
42
43         /* wait for a free slot in the fifo */
44         addr  = nv_rd32(pmu, 0x10a4a0);
45         if (!nv_wait_ne(pmu, 0x10a4b0, 0xffffffff, addr ^ 8))
46                 return -EBUSY;
47
48         /* we currently only support a single process at a time waiting
49          * on a synchronous reply, take the PMU mutex and tell the
50          * receive handler what we're waiting for
51          */
52         if (reply) {
53                 mutex_lock(&subdev->mutex);
54                 pmu->recv.message = message;
55                 pmu->recv.process = process;
56         }
57
58         /* acquire data segment access */
59         do {
60                 nv_wr32(pmu, 0x10a580, 0x00000001);
61         } while (nv_rd32(pmu, 0x10a580) != 0x00000001);
62
63         /* write the packet */
64         nv_wr32(pmu, 0x10a1c0, 0x01000000 | (((addr & 0x07) << 4) +
65                                 pmu->send.base));
66         nv_wr32(pmu, 0x10a1c4, process);
67         nv_wr32(pmu, 0x10a1c4, message);
68         nv_wr32(pmu, 0x10a1c4, data0);
69         nv_wr32(pmu, 0x10a1c4, data1);
70         nv_wr32(pmu, 0x10a4a0, (addr + 1) & 0x0f);
71
72         /* release data segment access */
73         nv_wr32(pmu, 0x10a580, 0x00000000);
74
75         /* wait for reply, if requested */
76         if (reply) {
77                 wait_event(pmu->recv.wait, (pmu->recv.process == 0));
78                 reply[0] = pmu->recv.data[0];
79                 reply[1] = pmu->recv.data[1];
80                 mutex_unlock(&subdev->mutex);
81         }
82
83         return 0;
84 }
85
86 static void
87 nvkm_pmu_recv(struct work_struct *work)
88 {
89         struct nvkm_pmu *pmu = container_of(work, struct nvkm_pmu, recv.work);
90         u32 process, message, data0, data1;
91
92         /* nothing to do if GET == PUT */
93         u32 addr =  nv_rd32(pmu, 0x10a4cc);
94         if (addr == nv_rd32(pmu, 0x10a4c8))
95                 return;
96
97         /* acquire data segment access */
98         do {
99                 nv_wr32(pmu, 0x10a580, 0x00000002);
100         } while (nv_rd32(pmu, 0x10a580) != 0x00000002);
101
102         /* read the packet */
103         nv_wr32(pmu, 0x10a1c0, 0x02000000 | (((addr & 0x07) << 4) +
104                                 pmu->recv.base));
105         process = nv_rd32(pmu, 0x10a1c4);
106         message = nv_rd32(pmu, 0x10a1c4);
107         data0   = nv_rd32(pmu, 0x10a1c4);
108         data1   = nv_rd32(pmu, 0x10a1c4);
109         nv_wr32(pmu, 0x10a4cc, (addr + 1) & 0x0f);
110
111         /* release data segment access */
112         nv_wr32(pmu, 0x10a580, 0x00000000);
113
114         /* wake process if it's waiting on a synchronous reply */
115         if (pmu->recv.process) {
116                 if (process == pmu->recv.process &&
117                     message == pmu->recv.message) {
118                         pmu->recv.data[0] = data0;
119                         pmu->recv.data[1] = data1;
120                         pmu->recv.process = 0;
121                         wake_up(&pmu->recv.wait);
122                         return;
123                 }
124         }
125
126         /* right now there's no other expected responses from the engine,
127          * so assume that any unexpected message is an error.
128          */
129         nv_warn(pmu, "%c%c%c%c 0x%08x 0x%08x 0x%08x 0x%08x\n",
130                 (char)((process & 0x000000ff) >>  0),
131                 (char)((process & 0x0000ff00) >>  8),
132                 (char)((process & 0x00ff0000) >> 16),
133                 (char)((process & 0xff000000) >> 24),
134                 process, message, data0, data1);
135 }
136
137 static void
138 nvkm_pmu_intr(struct nvkm_subdev *subdev)
139 {
140         struct nvkm_pmu *pmu = (void *)subdev;
141         u32 disp = nv_rd32(pmu, 0x10a01c);
142         u32 intr = nv_rd32(pmu, 0x10a008) & disp & ~(disp >> 16);
143
144         if (intr & 0x00000020) {
145                 u32 stat = nv_rd32(pmu, 0x10a16c);
146                 if (stat & 0x80000000) {
147                         nv_error(pmu, "UAS fault at 0x%06x addr 0x%08x\n",
148                                  stat & 0x00ffffff, nv_rd32(pmu, 0x10a168));
149                         nv_wr32(pmu, 0x10a16c, 0x00000000);
150                         intr &= ~0x00000020;
151                 }
152         }
153
154         if (intr & 0x00000040) {
155                 schedule_work(&pmu->recv.work);
156                 nv_wr32(pmu, 0x10a004, 0x00000040);
157                 intr &= ~0x00000040;
158         }
159
160         if (intr & 0x00000080) {
161                 nv_info(pmu, "wr32 0x%06x 0x%08x\n", nv_rd32(pmu, 0x10a7a0),
162                                                      nv_rd32(pmu, 0x10a7a4));
163                 nv_wr32(pmu, 0x10a004, 0x00000080);
164                 intr &= ~0x00000080;
165         }
166
167         if (intr) {
168                 nv_error(pmu, "intr 0x%08x\n", intr);
169                 nv_wr32(pmu, 0x10a004, intr);
170         }
171 }
172
173 int
174 _nvkm_pmu_fini(struct nvkm_object *object, bool suspend)
175 {
176         struct nvkm_pmu *pmu = (void *)object;
177
178         nv_wr32(pmu, 0x10a014, 0x00000060);
179         flush_work(&pmu->recv.work);
180
181         return nvkm_subdev_fini(&pmu->base, suspend);
182 }
183
184 int
185 _nvkm_pmu_init(struct nvkm_object *object)
186 {
187         const struct nvkm_pmu_impl *impl = (void *)object->oclass;
188         struct nvkm_pmu *pmu = (void *)object;
189         int ret, i;
190
191         ret = nvkm_subdev_init(&pmu->base);
192         if (ret)
193                 return ret;
194
195         nv_subdev(pmu)->intr = nvkm_pmu_intr;
196         pmu->message = nvkm_pmu_send;
197         pmu->pgob = nvkm_pmu_pgob;
198
199         /* prevent previous ucode from running, wait for idle, reset */
200         nv_wr32(pmu, 0x10a014, 0x0000ffff); /* INTR_EN_CLR = ALL */
201         nv_wait(pmu, 0x10a04c, 0xffffffff, 0x00000000);
202         nv_mask(pmu, 0x000200, 0x00002000, 0x00000000);
203         nv_mask(pmu, 0x000200, 0x00002000, 0x00002000);
204         nv_rd32(pmu, 0x000200);
205         nv_wait(pmu, 0x10a10c, 0x00000006, 0x00000000);
206
207         /* upload data segment */
208         nv_wr32(pmu, 0x10a1c0, 0x01000000);
209         for (i = 0; i < impl->data.size / 4; i++)
210                 nv_wr32(pmu, 0x10a1c4, impl->data.data[i]);
211
212         /* upload code segment */
213         nv_wr32(pmu, 0x10a180, 0x01000000);
214         for (i = 0; i < impl->code.size / 4; i++) {
215                 if ((i & 0x3f) == 0)
216                         nv_wr32(pmu, 0x10a188, i >> 6);
217                 nv_wr32(pmu, 0x10a184, impl->code.data[i]);
218         }
219
220         /* start it running */
221         nv_wr32(pmu, 0x10a10c, 0x00000000);
222         nv_wr32(pmu, 0x10a104, 0x00000000);
223         nv_wr32(pmu, 0x10a100, 0x00000002);
224
225         /* wait for valid host->pmu ring configuration */
226         if (!nv_wait_ne(pmu, 0x10a4d0, 0xffffffff, 0x00000000))
227                 return -EBUSY;
228         pmu->send.base = nv_rd32(pmu, 0x10a4d0) & 0x0000ffff;
229         pmu->send.size = nv_rd32(pmu, 0x10a4d0) >> 16;
230
231         /* wait for valid pmu->host ring configuration */
232         if (!nv_wait_ne(pmu, 0x10a4dc, 0xffffffff, 0x00000000))
233                 return -EBUSY;
234         pmu->recv.base = nv_rd32(pmu, 0x10a4dc) & 0x0000ffff;
235         pmu->recv.size = nv_rd32(pmu, 0x10a4dc) >> 16;
236
237         nv_wr32(pmu, 0x10a010, 0x000000e0);
238         return 0;
239 }
240
241 int
242 nvkm_pmu_create_(struct nvkm_object *parent, struct nvkm_object *engine,
243                  struct nvkm_oclass *oclass, int length, void **pobject)
244 {
245         struct nvkm_pmu *pmu;
246         int ret;
247
248         ret = nvkm_subdev_create_(parent, engine, oclass, 0, "PMU",
249                                   "pmu", length, pobject);
250         pmu = *pobject;
251         if (ret)
252                 return ret;
253
254         INIT_WORK(&pmu->recv.work, nvkm_pmu_recv);
255         init_waitqueue_head(&pmu->recv.wait);
256         return 0;
257 }
258
259 int
260 _nvkm_pmu_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
261                struct nvkm_oclass *oclass, void *data, u32 size,
262                struct nvkm_object **pobject)
263 {
264         struct nvkm_pmu *pmu;
265         int ret = nvkm_pmu_create(parent, engine, oclass, &pmu);
266         *pobject = nv_object(pmu);
267         return ret;
268 }