drivers/gpu/drm/nouveau/nouveau_display.c

   1 /*
   2  * Copyright (C) 2008 Maarten Maathuis.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm_crtc_helper.h"
  29 #include "nouveau_drv.h"
  30 #include "nouveau_fb.h"
  31 #include "nouveau_fbcon.h"
  32 #include "nouveau_hw.h"
  33 #include "nouveau_crtc.h"
  34 #include "nouveau_dma.h"
  35 #include "nv50_display.h"
  36
  37 static void
  38 nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
  39 {
  40         struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
  41
  42         if (fb->nvbo)
  43                 drm_gem_object_unreference_unlocked(fb->nvbo->gem);
  44
  45         drm_framebuffer_cleanup(drm_fb);
  46         kfree(fb);
  47 }
  48
  49 static int
  50 nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
  51                                        struct drm_file *file_priv,
  52                                        unsigned int *handle)
  53 {
  54         struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
  55
  56         return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
  57 }
  58
  59 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
  60         .destroy = nouveau_user_framebuffer_destroy,
  61         .create_handle = nouveau_user_framebuffer_create_handle,
  62 };
  63
  64 int
  65 nouveau_framebuffer_init(struct drm_device *dev,
  66                          struct nouveau_framebuffer *nv_fb,
  67                          struct drm_mode_fb_cmd *mode_cmd,
  68                          struct nouveau_bo *nvbo)
  69 {
  70         struct drm_nouveau_private *dev_priv = dev->dev_private;
  71         struct drm_framebuffer *fb = &nv_fb->base;
  72         int ret;
  73
  74         ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
  75         if (ret) {
  76                 return ret;
  77         }
  78
  79         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
  80         nv_fb->nvbo = nvbo;
  81
  82         if (dev_priv->card_type >= NV_50) {
  83                 u32 tile_flags = nouveau_bo_tile_layout(nvbo);
  84                 if (tile_flags == 0x7a00 ||
  85                     tile_flags == 0xfe00)
  86                         nv_fb->r_dma = NvEvoFB32;
  87                 else
  88                 if (tile_flags == 0x7000)
  89                         nv_fb->r_dma = NvEvoFB16;
  90                 else
  91                         nv_fb->r_dma = NvEvoVRAM_LP;
  92
  93                 switch (fb->depth) {
  94                 case  8: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_8; break;
  95                 case 15: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_15; break;
  96                 case 16: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_16; break;
  97                 case 24:
  98                 case 32: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_24; break;
  99                 case 30: nv_fb->r_format = NV50_EVO_CRTC_FB_DEPTH_30; break;
 100                 default:
 101                          NV_ERROR(dev, "unknown depth %d\n", fb->depth);
 102                          return -EINVAL;
 103                 }
 104
 105                 if (dev_priv->chipset == 0x50)
 106                         nv_fb->r_format |= (tile_flags << 8);
 107
 108                 if (!tile_flags)
 109                         nv_fb->r_pitch = 0x00100000 | fb->pitch;
 110                 else {
 111                         u32 mode = nvbo->tile_mode;
 112                         if (dev_priv->card_type >= NV_C0)
 113                                 mode >>= 4;
 114                         nv_fb->r_pitch = ((fb->pitch / 4) << 4) | mode;
 115                 }
 116         }
 117
 118         return 0;
 119 }
 120
 121 static struct drm_framebuffer *
 122 nouveau_user_framebuffer_create(struct drm_device *dev,
 123                                 struct drm_file *file_priv,
 124                                 struct drm_mode_fb_cmd *mode_cmd)
 125 {
 126         struct nouveau_framebuffer *nouveau_fb;
 127         struct drm_gem_object *gem;
 128         int ret;
 129
 130         gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
 131         if (!gem)
 132                 return ERR_PTR(-ENOENT);
 133
 134         nouveau_fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
 135         if (!nouveau_fb)
 136                 return ERR_PTR(-ENOMEM);
 137
 138         ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem));
 139         if (ret) {
 140                 drm_gem_object_unreference(gem);
 141                 return ERR_PTR(ret);
 142         }
 143
 144         return &nouveau_fb->base;
 145 }
 146
 147 const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
 148         .fb_create = nouveau_user_framebuffer_create,
 149         .output_poll_changed = nouveau_fbcon_output_poll_changed,
 150 };
 151
 152 int
 153 nouveau_vblank_enable(struct drm_device *dev, int crtc)
 154 {
 155         struct drm_nouveau_private *dev_priv = dev->dev_private;
 156
 157         if (dev_priv->card_type >= NV_50)
 158                 nv_mask(dev, NV50_PDISPLAY_INTR_EN_1, 0,
 159                         NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(crtc));
 160         else
 161                 NVWriteCRTC(dev, crtc, NV_PCRTC_INTR_EN_0,
 162                             NV_PCRTC_INTR_0_VBLANK);
 163
 164         return 0;
 165 }
 166
 167 void
 168 nouveau_vblank_disable(struct drm_device *dev, int crtc)
 169 {
 170         struct drm_nouveau_private *dev_priv = dev->dev_private;
 171
 172         if (dev_priv->card_type >= NV_50)
 173                 nv_mask(dev, NV50_PDISPLAY_INTR_EN_1,
 174                         NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(crtc), 0);
 175         else
 176                 NVWriteCRTC(dev, crtc, NV_PCRTC_INTR_EN_0, 0);
 177 }
 178
 179 static int
 180 nouveau_page_flip_reserve(struct nouveau_bo *old_bo,
 181                           struct nouveau_bo *new_bo)
 182 {
 183         int ret;
 184
 185         ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM);
 186         if (ret)
 187                 return ret;
 188
 189         ret = ttm_bo_reserve(&new_bo->bo, false, false, false, 0);
 190         if (ret)
 191                 goto fail;
 192
 193         ret = ttm_bo_reserve(&old_bo->bo, false, false, false, 0);
 194         if (ret)
 195                 goto fail_unreserve;
 196
 197         return 0;
 198
 199 fail_unreserve:
 200         ttm_bo_unreserve(&new_bo->bo);
 201 fail:
 202         nouveau_bo_unpin(new_bo);
 203         return ret;
 204 }
 205
 206 static void
 207 nouveau_page_flip_unreserve(struct nouveau_bo *old_bo,
 208                             struct nouveau_bo *new_bo,
 209                             struct nouveau_fence *fence)
 210 {
 211         nouveau_bo_fence(new_bo, fence);
 212         ttm_bo_unreserve(&new_bo->bo);
 213
 214         nouveau_bo_fence(old_bo, fence);
 215         ttm_bo_unreserve(&old_bo->bo);
 216
 217         nouveau_bo_unpin(old_bo);
 218 }
 219
 220 static int
 221 nouveau_page_flip_emit(struct nouveau_channel *chan,
 222                        struct nouveau_bo *old_bo,
 223                        struct nouveau_bo *new_bo,
 224                        struct nouveau_page_flip_state *s,
 225                        struct nouveau_fence **pfence)
 226 {
 227         struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
 228         struct drm_device *dev = chan->dev;
 229         unsigned long flags;
 230         int ret;
 231
 232         /* Queue it to the pending list */
 233         spin_lock_irqsave(&dev->event_lock, flags);
 234         list_add_tail(&s->head, &chan->nvsw.flip);
 235         spin_unlock_irqrestore(&dev->event_lock, flags);
 236
 237         /* Synchronize with the old framebuffer */
 238         ret = nouveau_fence_sync(old_bo->bo.sync_obj, chan);
 239         if (ret)
 240                 goto fail;
 241
 242         /* Emit the pageflip */
 243         ret = RING_SPACE(chan, 2);
 244         if (ret)
 245                 goto fail;
 246
 247         if (dev_priv->card_type < NV_C0)
 248                 BEGIN_RING(chan, NvSubSw, NV_SW_PAGE_FLIP, 1);
 249         else
 250                 BEGIN_NVC0(chan, 2, NvSubM2MF, 0x0500, 1);
 251         OUT_RING  (chan, 0);
 252         FIRE_RING (chan);
 253
 254         ret = nouveau_fence_new(chan, pfence, true);
 255         if (ret)
 256                 goto fail;
 257
 258         return 0;
 259 fail:
 260         spin_lock_irqsave(&dev->event_lock, flags);
 261         list_del(&s->head);
 262         spin_unlock_irqrestore(&dev->event_lock, flags);
 263         return ret;
 264 }
 265
 266 int
 267 nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 268                        struct drm_pending_vblank_event *event)
 269 {
 270         struct drm_device *dev = crtc->dev;
 271         struct drm_nouveau_private *dev_priv = dev->dev_private;
 272         struct nouveau_bo *old_bo = nouveau_framebuffer(crtc->fb)->nvbo;
 273         struct nouveau_bo *new_bo = nouveau_framebuffer(fb)->nvbo;
 274         struct nouveau_page_flip_state *s;
 275         struct nouveau_channel *chan;
 276         struct nouveau_fence *fence;
 277         int ret;
 278
 279         if (!dev_priv->channel)
 280                 return -ENODEV;
 281
 282         s = kzalloc(sizeof(*s), GFP_KERNEL);
 283         if (!s)
 284                 return -ENOMEM;
 285
 286         /* Don't let the buffers go away while we flip */
 287         ret = nouveau_page_flip_reserve(old_bo, new_bo);
 288         if (ret)
 289                 goto fail_free;
 290
 291         /* Initialize a page flip struct */
 292         *s = (struct nouveau_page_flip_state)
 293                 { { }, event, nouveau_crtc(crtc)->index,
 294                   fb->bits_per_pixel, fb->pitch, crtc->x, crtc->y,
 295                   new_bo->bo.offset };
 296
 297         /* Choose the channel the flip will be handled in */
 298         chan = nouveau_fence_channel(new_bo->bo.sync_obj);
 299         if (!chan)
 300                 chan = nouveau_channel_get_unlocked(dev_priv->channel);
 301         mutex_lock(&chan->mutex);
 302
 303         /* Emit a page flip */
 304         if (dev_priv->card_type >= NV_50) {
 305                 ret = nv50_display_flip_next(crtc, fb, chan);
 306                 if (ret) {
 307                         nouveau_channel_put(&chan);
 308                         goto fail_unreserve;
 309                 }
 310         }
 311
 312         ret = nouveau_page_flip_emit(chan, old_bo, new_bo, s, &fence);
 313         nouveau_channel_put(&chan);
 314         if (ret)
 315                 goto fail_unreserve;
 316
 317         /* Update the crtc struct and cleanup */
 318         crtc->fb = fb;
 319
 320         nouveau_page_flip_unreserve(old_bo, new_bo, fence);
 321         nouveau_fence_unref(&fence);
 322         return 0;
 323
 324 fail_unreserve:
 325         nouveau_page_flip_unreserve(old_bo, new_bo, NULL);
 326 fail_free:
 327         kfree(s);
 328         return ret;
 329 }
 330
 331 int
 332 nouveau_finish_page_flip(struct nouveau_channel *chan,
 333                          struct nouveau_page_flip_state *ps)
 334 {
 335         struct drm_device *dev = chan->dev;
 336         struct nouveau_page_flip_state *s;
 337         unsigned long flags;
 338
 339         spin_lock_irqsave(&dev->event_lock, flags);
 340
 341         if (list_empty(&chan->nvsw.flip)) {
 342                 NV_ERROR(dev, "Unexpected pageflip in channel %d.\n", chan->id);
 343                 spin_unlock_irqrestore(&dev->event_lock, flags);
 344                 return -EINVAL;
 345         }
 346
 347         s = list_first_entry(&chan->nvsw.flip,
 348                              struct nouveau_page_flip_state, head);
 349         if (s->event) {
 350                 struct drm_pending_vblank_event *e = s->event;
 351                 struct timeval now;
 352
 353                 do_gettimeofday(&now);
 354                 e->event.sequence = 0;
 355                 e->event.tv_sec = now.tv_sec;
 356                 e->event.tv_usec = now.tv_usec;
 357                 list_add_tail(&e->base.link, &e->base.file_priv->event_list);
 358                 wake_up_interruptible(&e->base.file_priv->event_wait);
 359         }
 360
 361         list_del(&s->head);
 362         if (ps)
 363                 *ps = *s;
 364         kfree(s);
 365
 366         spin_unlock_irqrestore(&dev->event_lock, flags);
 367         return 0;
 368 }