2 * Copyright 2005-2006 Stephane Marchesin
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
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 * PRECISION INSIGHT AND/OR ITS SUPPLIERS 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 OTHER
22 * DEALINGS IN THE SOFTWARE.
27 #include "nouveau_drv.h"
28 #include "nouveau_drm.h"
29 #include "nouveau_dma.h"
32 nouveau_channel_pushbuf_ctxdma_init(struct nouveau_channel *chan)
34 struct drm_device *dev = chan->dev;
35 struct drm_nouveau_private *dev_priv = dev->dev_private;
36 struct nouveau_bo *pb = chan->pushbuf_bo;
37 struct nouveau_gpuobj *pushbuf = NULL;
40 if (dev_priv->card_type >= NV_50) {
41 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, 0,
42 dev_priv->vm_end, NV_DMA_ACCESS_RO,
43 NV_DMA_TARGET_AGP, &pushbuf);
44 chan->pushbuf_base = pb->bo.offset;
46 if (pb->bo.mem.mem_type == TTM_PL_TT) {
47 ret = nouveau_gpuobj_gart_dma_new(chan, 0,
48 dev_priv->gart_info.aper_size,
49 NV_DMA_ACCESS_RO, &pushbuf,
51 chan->pushbuf_base = pb->bo.mem.mm_node->start << PAGE_SHIFT;
53 if (dev_priv->card_type != NV_04) {
54 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, 0,
55 dev_priv->fb_available_size,
57 NV_DMA_TARGET_VIDMEM, &pushbuf);
58 chan->pushbuf_base = pb->bo.mem.mm_node->start << PAGE_SHIFT;
60 /* NV04 cmdbuf hack, from original ddx.. not sure of it's
61 * exact reason for existing :) PCI access to cmdbuf in
64 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY,
65 pci_resource_start(dev->pdev,
67 dev_priv->fb_available_size,
69 NV_DMA_TARGET_PCI, &pushbuf);
70 chan->pushbuf_base = pb->bo.mem.mm_node->start << PAGE_SHIFT;
73 ret = nouveau_gpuobj_ref_add(dev, chan, 0, pushbuf, &chan->pushbuf);
75 NV_ERROR(dev, "Error referencing pushbuf ctxdma: %d\n", ret);
76 if (pushbuf != dev_priv->gart_info.sg_ctxdma)
77 nouveau_gpuobj_del(dev, &pushbuf);
84 static struct nouveau_bo *
85 nouveau_channel_user_pushbuf_alloc(struct drm_device *dev)
87 struct nouveau_bo *pushbuf = NULL;
90 if (nouveau_vram_pushbuf)
91 location = TTM_PL_FLAG_VRAM;
93 location = TTM_PL_FLAG_TT;
95 ret = nouveau_bo_new(dev, NULL, 65536, 0, location, 0, 0x0000, false,
98 NV_ERROR(dev, "error allocating DMA push buffer: %d\n", ret);
102 ret = nouveau_bo_pin(pushbuf, location);
104 NV_ERROR(dev, "error pinning DMA push buffer: %d\n", ret);
105 nouveau_bo_ref(NULL, &pushbuf);
112 /* allocates and initializes a fifo for user space consumption */
114 nouveau_channel_alloc(struct drm_device *dev, struct nouveau_channel **chan_ret,
115 struct drm_file *file_priv,
116 uint32_t vram_handle, uint32_t tt_handle)
118 struct drm_nouveau_private *dev_priv = dev->dev_private;
119 struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
120 struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
121 struct nouveau_channel *chan;
126 * Alright, here is the full story
127 * Nvidia cards have multiple hw fifo contexts (praise them for that,
128 * no complicated crash-prone context switches)
129 * We allocate a new context for each app and let it write to it
130 * directly (woo, full userspace command submission !)
131 * When there are no more contexts, you lost
133 for (channel = 0; channel < pfifo->channels; channel++) {
134 if (dev_priv->fifos[channel] == NULL)
138 /* no more fifos. you lost. */
139 if (channel == pfifo->channels)
142 dev_priv->fifos[channel] = kzalloc(sizeof(struct nouveau_channel),
144 if (!dev_priv->fifos[channel])
146 chan = dev_priv->fifos[channel];
147 INIT_LIST_HEAD(&chan->nvsw.vbl_wait);
148 INIT_LIST_HEAD(&chan->fence.pending);
151 chan->file_priv = file_priv;
152 chan->vram_handle = vram_handle;
153 chan->gart_handle = tt_handle;
155 NV_INFO(dev, "Allocating FIFO number %d\n", channel);
157 /* Allocate DMA push buffer */
158 chan->pushbuf_bo = nouveau_channel_user_pushbuf_alloc(dev);
159 if (!chan->pushbuf_bo) {
161 NV_ERROR(dev, "pushbuf %d\n", ret);
162 nouveau_channel_free(chan);
166 nouveau_dma_pre_init(chan);
168 /* Locate channel's user control regs */
169 if (dev_priv->card_type < NV_40)
170 user = NV03_USER(channel);
172 if (dev_priv->card_type < NV_50)
173 user = NV40_USER(channel);
175 user = NV50_USER(channel);
177 chan->user = ioremap(pci_resource_start(dev->pdev, 0) + user,
180 NV_ERROR(dev, "ioremap of regs failed.\n");
181 nouveau_channel_free(chan);
184 chan->user_put = 0x40;
185 chan->user_get = 0x44;
187 /* Allocate space for per-channel fixed notifier memory */
188 ret = nouveau_notifier_init_channel(chan);
190 NV_ERROR(dev, "ntfy %d\n", ret);
191 nouveau_channel_free(chan);
195 /* Setup channel's default objects */
196 ret = nouveau_gpuobj_channel_init(chan, vram_handle, tt_handle);
198 NV_ERROR(dev, "gpuobj %d\n", ret);
199 nouveau_channel_free(chan);
203 /* Create a dma object for the push buffer */
204 ret = nouveau_channel_pushbuf_ctxdma_init(chan);
206 NV_ERROR(dev, "pbctxdma %d\n", ret);
207 nouveau_channel_free(chan);
211 /* disable the fifo caches */
212 pfifo->reassign(dev, false);
214 /* Create a graphics context for new channel */
215 ret = pgraph->create_context(chan);
217 nouveau_channel_free(chan);
221 /* Construct inital RAMFC for new channel */
222 ret = pfifo->create_context(chan);
224 nouveau_channel_free(chan);
228 pfifo->reassign(dev, true);
230 ret = nouveau_dma_init(chan);
232 ret = nouveau_fence_init(chan);
234 nouveau_channel_free(chan);
238 nouveau_debugfs_channel_init(chan);
240 NV_INFO(dev, "%s: initialised FIFO %d\n", __func__, channel);
247 nouveau_channel_free(struct nouveau_channel *chan)
249 struct drm_device *dev = chan->dev;
250 struct drm_nouveau_private *dev_priv = dev->dev_private;
251 struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
252 struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
256 NV_INFO(dev, "%s: freeing fifo %d\n", __func__, chan->id);
258 nouveau_debugfs_channel_fini(chan);
260 /* Give outstanding push buffers a chance to complete */
261 nouveau_fence_update(chan);
262 if (chan->fence.sequence != chan->fence.sequence_ack) {
263 struct nouveau_fence *fence = NULL;
265 ret = nouveau_fence_new(chan, &fence, true);
267 ret = nouveau_fence_wait(fence, NULL, false, false);
268 nouveau_fence_unref((void *)&fence);
272 NV_ERROR(dev, "Failed to idle channel %d.\n", chan->id);
275 /* Ensure all outstanding fences are signaled. They should be if the
276 * above attempts at idling were OK, but if we failed this'll tell TTM
277 * we're done with the buffers.
279 nouveau_fence_fini(chan);
281 /* This will prevent pfifo from switching channels. */
282 pfifo->reassign(dev, false);
284 /* We want to give pgraph a chance to idle and get rid of all potential
285 * errors. We need to do this before the lock, otherwise the irq handler
286 * is unable to process them.
288 if (pgraph->channel(dev) == chan)
289 nouveau_wait_for_idle(dev);
291 spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
293 pgraph->fifo_access(dev, false);
294 if (pgraph->channel(dev) == chan)
295 pgraph->unload_context(dev);
296 pgraph->destroy_context(chan);
297 pgraph->fifo_access(dev, true);
299 if (pfifo->channel_id(dev) == chan->id) {
301 pfifo->unload_context(dev);
304 pfifo->destroy_context(chan);
306 pfifo->reassign(dev, true);
308 spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
310 /* Release the channel's resources */
311 nouveau_gpuobj_ref_del(dev, &chan->pushbuf);
312 if (chan->pushbuf_bo) {
313 nouveau_bo_unpin(chan->pushbuf_bo);
314 nouveau_bo_ref(NULL, &chan->pushbuf_bo);
316 nouveau_gpuobj_channel_takedown(chan);
317 nouveau_notifier_takedown_channel(chan);
321 dev_priv->fifos[chan->id] = NULL;
325 /* cleans up all the fifos from file_priv */
327 nouveau_channel_cleanup(struct drm_device *dev, struct drm_file *file_priv)
329 struct drm_nouveau_private *dev_priv = dev->dev_private;
330 struct nouveau_engine *engine = &dev_priv->engine;
333 NV_DEBUG(dev, "clearing FIFO enables from file_priv\n");
334 for (i = 0; i < engine->fifo.channels; i++) {
335 struct nouveau_channel *chan = dev_priv->fifos[i];
337 if (chan && chan->file_priv == file_priv)
338 nouveau_channel_free(chan);
343 nouveau_channel_owner(struct drm_device *dev, struct drm_file *file_priv,
346 struct drm_nouveau_private *dev_priv = dev->dev_private;
347 struct nouveau_engine *engine = &dev_priv->engine;
349 if (channel >= engine->fifo.channels)
351 if (dev_priv->fifos[channel] == NULL)
354 return (dev_priv->fifos[channel]->file_priv == file_priv);
357 /***********************************
358 * ioctls wrapping the functions
359 ***********************************/
362 nouveau_ioctl_fifo_alloc(struct drm_device *dev, void *data,
363 struct drm_file *file_priv)
365 struct drm_nouveau_private *dev_priv = dev->dev_private;
366 struct drm_nouveau_channel_alloc *init = data;
367 struct nouveau_channel *chan;
370 if (dev_priv->engine.graph.accel_blocked)
373 if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
376 ret = nouveau_channel_alloc(dev, &chan, file_priv,
377 init->fb_ctxdma_handle,
378 init->tt_ctxdma_handle);
381 init->channel = chan->id;
383 if (chan->dma.ib_max)
384 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
385 NOUVEAU_GEM_DOMAIN_GART;
386 else if (chan->pushbuf_bo->bo.mem.mem_type == TTM_PL_VRAM)
387 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
389 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
391 init->subchan[0].handle = NvM2MF;
392 if (dev_priv->card_type < NV_50)
393 init->subchan[0].grclass = 0x0039;
395 init->subchan[0].grclass = 0x5039;
396 init->subchan[1].handle = NvSw;
397 init->subchan[1].grclass = NV_SW;
398 init->nr_subchan = 2;
400 /* Named memory object area */
401 ret = drm_gem_handle_create(file_priv, chan->notifier_bo->gem,
402 &init->notifier_handle);
404 nouveau_channel_free(chan);
412 nouveau_ioctl_fifo_free(struct drm_device *dev, void *data,
413 struct drm_file *file_priv)
415 struct drm_nouveau_channel_free *cfree = data;
416 struct nouveau_channel *chan;
418 NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(cfree->channel, file_priv, chan);
420 nouveau_channel_free(chan);
424 /***********************************
425 * finally, the ioctl table
426 ***********************************/
428 struct drm_ioctl_desc nouveau_ioctls[] = {
429 DRM_IOCTL_DEF(DRM_NOUVEAU_GETPARAM, nouveau_ioctl_getparam, DRM_AUTH),
430 DRM_IOCTL_DEF(DRM_NOUVEAU_SETPARAM, nouveau_ioctl_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
431 DRM_IOCTL_DEF(DRM_NOUVEAU_CHANNEL_ALLOC, nouveau_ioctl_fifo_alloc, DRM_AUTH),
432 DRM_IOCTL_DEF(DRM_NOUVEAU_CHANNEL_FREE, nouveau_ioctl_fifo_free, DRM_AUTH),
433 DRM_IOCTL_DEF(DRM_NOUVEAU_GROBJ_ALLOC, nouveau_ioctl_grobj_alloc, DRM_AUTH),
434 DRM_IOCTL_DEF(DRM_NOUVEAU_NOTIFIEROBJ_ALLOC, nouveau_ioctl_notifier_alloc, DRM_AUTH),
435 DRM_IOCTL_DEF(DRM_NOUVEAU_GPUOBJ_FREE, nouveau_ioctl_gpuobj_free, DRM_AUTH),
436 DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_NEW, nouveau_gem_ioctl_new, DRM_AUTH),
437 DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_PUSHBUF, nouveau_gem_ioctl_pushbuf, DRM_AUTH),
438 DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_CPU_PREP, nouveau_gem_ioctl_cpu_prep, DRM_AUTH),
439 DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini, DRM_AUTH),
440 DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info, DRM_AUTH),
443 int nouveau_max_ioctl = DRM_ARRAY_SIZE(nouveau_ioctls);