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drm/nv50: initial work to allow multiple evo channels
[mv-sheeva.git] / drivers / gpu / drm / nouveau / nv50_evo.c
1 /*
2  * Copyright 2010 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
25 #include "drmP.h"
26
27 #include "nouveau_drv.h"
28 #include "nouveau_dma.h"
29 #include "nouveau_ramht.h"
30
31 static void
32 nv50_evo_channel_del(struct nouveau_channel **pevo)
33 {
34         struct drm_nouveau_private *dev_priv;
35         struct nouveau_channel *evo = *pevo;
36
37         if (!evo)
38                 return;
39         *pevo = NULL;
40
41         dev_priv = evo->dev->dev_private;
42         dev_priv->evo_alloc &= ~(1 << evo->id);
43
44         nouveau_gpuobj_channel_takedown(evo);
45         nouveau_bo_unmap(evo->pushbuf_bo);
46         nouveau_bo_ref(NULL, &evo->pushbuf_bo);
47
48         if (evo->user)
49                 iounmap(evo->user);
50
51         kfree(evo);
52 }
53
54 int
55 nv50_evo_dmaobj_new(struct nouveau_channel *evo, u32 class, u32 name,
56                     u32 tile_flags, u32 magic_flags, u32 offset, u32 limit)
57 {
58         struct drm_nouveau_private *dev_priv = evo->dev->dev_private;
59         struct drm_device *dev = evo->dev;
60         struct nouveau_gpuobj *obj = NULL;
61         int ret;
62
63         ret = nouveau_gpuobj_new(dev, dev_priv->evo, 6*4, 32, 0, &obj);
64         if (ret)
65                 return ret;
66         obj->engine = NVOBJ_ENGINE_DISPLAY;
67
68         nv_wo32(obj,  0, (tile_flags << 22) | (magic_flags << 16) | class);
69         nv_wo32(obj,  4, limit);
70         nv_wo32(obj,  8, offset);
71         nv_wo32(obj, 12, 0x00000000);
72         nv_wo32(obj, 16, 0x00000000);
73         if (dev_priv->card_type < NV_C0)
74                 nv_wo32(obj, 20, 0x00010000);
75         else
76                 nv_wo32(obj, 20, 0x00020000);
77         dev_priv->engine.instmem.flush(dev);
78
79         ret = nouveau_ramht_insert(evo, name, obj);
80         nouveau_gpuobj_ref(NULL, &obj);
81         if (ret) {
82                 return ret;
83         }
84
85         return 0;
86 }
87
88 static int
89 nv50_evo_channel_new(struct drm_device *dev, struct nouveau_channel **pevo)
90 {
91         struct drm_nouveau_private *dev_priv = dev->dev_private;
92         struct nouveau_channel *evo;
93         int ret;
94
95         evo = kzalloc(sizeof(struct nouveau_channel), GFP_KERNEL);
96         if (!evo)
97                 return -ENOMEM;
98         *pevo = evo;
99
100         for (evo->id = 0; evo->id < 5; evo->id++) {
101                 if (dev_priv->evo_alloc & (1 << evo->id))
102                         continue;
103
104                 dev_priv->evo_alloc |= (1 << evo->id);
105                 break;
106         }
107
108         if (evo->id == 5) {
109                 kfree(evo);
110                 return -ENODEV;
111         }
112
113         evo->dev = dev;
114         evo->user_get = 4;
115         evo->user_put = 0;
116
117         ret = nouveau_bo_new(dev, NULL, 4096, 0, TTM_PL_FLAG_VRAM, 0, 0,
118                              false, true, &evo->pushbuf_bo);
119         if (ret == 0)
120                 ret = nouveau_bo_pin(evo->pushbuf_bo, TTM_PL_FLAG_VRAM);
121         if (ret) {
122                 NV_ERROR(dev, "Error creating EVO DMA push buffer: %d\n", ret);
123                 nv50_evo_channel_del(pevo);
124                 return ret;
125         }
126
127         ret = nouveau_bo_map(evo->pushbuf_bo);
128         if (ret) {
129                 NV_ERROR(dev, "Error mapping EVO DMA push buffer: %d\n", ret);
130                 nv50_evo_channel_del(pevo);
131                 return ret;
132         }
133
134         evo->user = ioremap(pci_resource_start(dev->pdev, 0) +
135                             NV50_PDISPLAY_USER(evo->id), PAGE_SIZE);
136         if (!evo->user) {
137                 NV_ERROR(dev, "Error mapping EVO control regs.\n");
138                 nv50_evo_channel_del(pevo);
139                 return -ENOMEM;
140         }
141
142         /* bind primary evo channel's ramht to the channel */
143         if (dev_priv->evo && evo != dev_priv->evo)
144                 nouveau_ramht_ref(dev_priv->evo->ramht, &evo->ramht, NULL);
145
146         return 0;
147 }
148
149 static int
150 nv50_evo_channel_init(struct nouveau_channel *evo)
151 {
152         struct drm_nouveau_private *dev_priv = evo->dev->dev_private;
153         struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer;
154         struct drm_device *dev = evo->dev;
155         int id = evo->id, ret, i;
156         u64 start;
157         u32 tmp;
158
159         /* taken from nv bug #12637, attempts to un-wedge the hw if it's
160          * stuck in some unspecified state
161          */
162         start = ptimer->read(dev);
163         nv_wr32(dev, NV50_PDISPLAY_EVO_CTRL(id), 0x2b00);
164         while ((tmp = nv_rd32(dev, NV50_PDISPLAY_EVO_CTRL(id))) & 0x1e0000) {
165                 if ((tmp & 0x9f0000) == 0x20000)
166                         nv_wr32(dev, NV50_PDISPLAY_EVO_CTRL(id), tmp | 0x800000);
167
168                 if ((tmp & 0x3f0000) == 0x30000)
169                         nv_wr32(dev, NV50_PDISPLAY_EVO_CTRL(id), tmp | 0x200000);
170
171                 if (ptimer->read(dev) - start > 1000000000ULL) {
172                         NV_ERROR(dev, "timeout: (0x610200 & 0x1e0000) != 0\n");
173                         NV_ERROR(dev, "0x610200 = 0x%08x\n", tmp);
174                         return -EBUSY;
175                 }
176         }
177
178         nv_wr32(dev, NV50_PDISPLAY_EVO_CTRL(id), 0x1000b03);
179         if (!nv_wait(dev, NV50_PDISPLAY_EVO_CTRL(id),
180                      0x40000000, 0x40000000)) {
181                 NV_ERROR(dev, "timeout: (0x610200 & 0x40000000) == 0x40000000\n");
182                 NV_ERROR(dev, "0x610200 = 0x%08x\n",
183                           nv_rd32(dev, NV50_PDISPLAY_EVO_CTRL(id)));
184                 return -EBUSY;
185         }
186
187         /* initialise fifo */
188         nv_wr32(dev, NV50_PDISPLAY_EVO_DMA_CB(id),
189                 ((evo->pushbuf_bo->bo.mem.start << PAGE_SHIFT) >> 8) |
190                 NV50_PDISPLAY_EVO_DMA_CB_LOCATION_VRAM |
191                 NV50_PDISPLAY_EVO_DMA_CB_VALID);
192         nv_wr32(dev, NV50_PDISPLAY_EVO_UNK2(id), 0x00010000);
193         nv_wr32(dev, NV50_PDISPLAY_EVO_HASH_TAG(id), id);
194         if (!nv_wait(dev, NV50_PDISPLAY_EVO_CTRL(id), 0x80000000, 0x00000000)) {
195                 NV_ERROR(dev, "timeout: (0x610200 & 0x80000000) == 0\n");
196                 NV_ERROR(dev, "0x610200 = 0x%08x\n",
197                          nv_rd32(dev, NV50_PDISPLAY_EVO_CTRL(id)));
198                 return -EBUSY;
199         }
200         nv_wr32(dev, NV50_PDISPLAY_EVO_CTRL(id),
201                 (nv_rd32(dev, NV50_PDISPLAY_EVO_CTRL(id)) & ~0x00000003) |
202                  NV50_PDISPLAY_EVO_CTRL_DMA_ENABLED);
203         nv_wr32(dev, NV50_PDISPLAY_USER_PUT(id), 0);
204         nv_wr32(dev, NV50_PDISPLAY_EVO_CTRL(id), 0x01000003 |
205                      NV50_PDISPLAY_EVO_CTRL_DMA_ENABLED);
206
207         /* enable error reporting on the channel */
208         nv_mask(dev, 0x610028, 0x00000000, 0x00010001 << id);
209
210         evo->dma.max = (4096/4) - 2;
211         evo->dma.put = 0;
212         evo->dma.cur = evo->dma.put;
213         evo->dma.free = evo->dma.max - evo->dma.cur;
214
215         ret = RING_SPACE(evo, NOUVEAU_DMA_SKIPS);
216         if (ret)
217                 return ret;
218
219         for (i = 0; i < NOUVEAU_DMA_SKIPS; i++)
220                 OUT_RING(evo, 0);
221
222         return 0;
223 }
224
225 static void
226 nv50_evo_channel_fini(struct nouveau_channel *evo)
227 {
228         struct drm_device *dev = evo->dev;
229
230         nv_wr32(dev, NV50_PDISPLAY_EVO_CTRL(evo->id), 0);
231         if (!nv_wait(dev, NV50_PDISPLAY_EVO_CTRL(evo->id), 0x1e0000, 0)) {
232                 NV_ERROR(dev, "timeout: (0x610200 & 0x1e0000) == 0\n");
233                 NV_ERROR(dev, "0x610200 = 0x%08x\n",
234                           nv_rd32(dev, NV50_PDISPLAY_EVO_CTRL(evo->id)));
235         }
236 }
237
238 static int
239 nv50_evo_create(struct drm_device *dev)
240 {
241         struct drm_nouveau_private *dev_priv = dev->dev_private;
242         struct nouveau_gpuobj *ramht = NULL;
243         struct nouveau_channel *evo;
244         int ret;
245
246         /* create primary evo channel, the one we use for modesetting
247          * purporses
248          */
249         ret = nv50_evo_channel_new(dev, &dev_priv->evo);
250         if (ret)
251                 return ret;
252         evo = dev_priv->evo;
253
254         /* setup object management on it, any other evo channel will
255          * use this also as there's no per-channel support on the
256          * hardware
257          */
258         ret = nouveau_gpuobj_new(dev, NULL, 32768, 0x1000,
259                                  NVOBJ_FLAG_ZERO_ALLOC, &evo->ramin);
260         if (ret) {
261                 NV_ERROR(dev, "Error allocating EVO channel memory: %d\n", ret);
262                 nv50_evo_channel_del(&dev_priv->evo);
263                 return ret;
264         }
265
266         ret = drm_mm_init(&evo->ramin_heap, 0, 32768);
267         if (ret) {
268                 NV_ERROR(dev, "Error initialising EVO PRAMIN heap: %d\n", ret);
269                 nv50_evo_channel_del(&dev_priv->evo);
270                 return ret;
271         }
272
273         ret = nouveau_gpuobj_new(dev, evo, 4096, 16, 0, &ramht);
274         if (ret) {
275                 NV_ERROR(dev, "Unable to allocate EVO RAMHT: %d\n", ret);
276                 nv50_evo_channel_del(&dev_priv->evo);
277                 return ret;
278         }
279
280         ret = nouveau_ramht_new(dev, ramht, &evo->ramht);
281         nouveau_gpuobj_ref(NULL, &ramht);
282         if (ret) {
283                 nv50_evo_channel_del(&dev_priv->evo);
284                 return ret;
285         }
286
287         /* create some default objects for the scanout memtypes we support */
288         if (dev_priv->chipset != 0x50) {
289                 ret = nv50_evo_dmaobj_new(evo, 0x3d, NvEvoFB16, 0x70, 0x19,
290                                           0, 0xffffffff);
291                 if (ret) {
292                         nv50_evo_channel_del(&dev_priv->evo);
293                         return ret;
294                 }
295
296
297                 ret = nv50_evo_dmaobj_new(evo, 0x3d, NvEvoFB32, 0x7a, 0x19,
298                                           0, 0xffffffff);
299                 if (ret) {
300                         nv50_evo_channel_del(&dev_priv->evo);
301                         return ret;
302                 }
303         }
304
305         ret = nv50_evo_dmaobj_new(evo, 0x3d, NvEvoVRAM, 0, 0x19,
306                                   0, dev_priv->vram_size);
307         if (ret) {
308                 nv50_evo_channel_del(&dev_priv->evo);
309                 return ret;
310         }
311
312         return 0;
313 }
314
315 int
316 nv50_evo_init(struct drm_device *dev)
317 {
318         struct drm_nouveau_private *dev_priv = dev->dev_private;
319         int ret;
320
321         if (!dev_priv->evo) {
322                 ret = nv50_evo_create(dev);
323                 if (ret)
324                         return ret;
325         }
326
327         return nv50_evo_channel_init(dev_priv->evo);
328 }
329
330 void
331 nv50_evo_fini(struct drm_device *dev)
332 {
333         struct drm_nouveau_private *dev_priv = dev->dev_private;
334
335         if (dev_priv->evo) {
336                 nv50_evo_channel_fini(dev_priv->evo);
337                 nv50_evo_channel_del(&dev_priv->evo);
338         }
339 }