drivers/gpu/drm/radeon/radeon_irq.c

   1 /* radeon_irq.c -- IRQ handling for radeon -*- linux-c -*- */
   2 /*
   3  * Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   4  *
   5  * The Weather Channel (TM) funded Tungsten Graphics to develop the
   6  * initial release of the Radeon 8500 driver under the XFree86 license.
   7  * This notice must be preserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the next
  17  * paragraph) shall be included in all copies or substantial portions of the
  18  * Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  26  * DEALINGS IN THE SOFTWARE.
  27  *
  28  * Authors:
  29  *    Keith Whitwell <keith@tungstengraphics.com>
  30  *    Michel D�zer <michel@daenzer.net>
  31  *
  32  * ------------------------ This file is DEPRECATED! -------------------------
  33  */
  34
  35 #include <drm/drmP.h>
  36 #include <drm/radeon_drm.h>
  37 #include "radeon_drv.h"
  38
  39 void radeon_irq_set_state(struct drm_device *dev, u32 mask, int state)
  40 {
  41         drm_radeon_private_t *dev_priv = dev->dev_private;
  42
  43         if (state)
  44                 dev_priv->irq_enable_reg |= mask;
  45         else
  46                 dev_priv->irq_enable_reg &= ~mask;
  47
  48         if (dev->irq_enabled)
  49                 RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg);
  50 }
  51
  52 static void r500_vbl_irq_set_state(struct drm_device *dev, u32 mask, int state)
  53 {
  54         drm_radeon_private_t *dev_priv = dev->dev_private;
  55
  56         if (state)
  57                 dev_priv->r500_disp_irq_reg |= mask;
  58         else
  59                 dev_priv->r500_disp_irq_reg &= ~mask;
  60
  61         if (dev->irq_enabled)
  62                 RADEON_WRITE(R500_DxMODE_INT_MASK, dev_priv->r500_disp_irq_reg);
  63 }
  64
  65 int radeon_enable_vblank(struct drm_device *dev, unsigned int pipe)
  66 {
  67         drm_radeon_private_t *dev_priv = dev->dev_private;
  68
  69         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
  70                 switch (pipe) {
  71                 case 0:
  72                         r500_vbl_irq_set_state(dev, R500_D1MODE_INT_MASK, 1);
  73                         break;
  74                 case 1:
  75                         r500_vbl_irq_set_state(dev, R500_D2MODE_INT_MASK, 1);
  76                         break;
  77                 default:
  78                         DRM_ERROR("tried to enable vblank on non-existent crtc %u\n",
  79                                   pipe);
  80                         return -EINVAL;
  81                 }
  82         } else {
  83                 switch (pipe) {
  84                 case 0:
  85                         radeon_irq_set_state(dev, RADEON_CRTC_VBLANK_MASK, 1);
  86                         break;
  87                 case 1:
  88                         radeon_irq_set_state(dev, RADEON_CRTC2_VBLANK_MASK, 1);
  89                         break;
  90                 default:
  91                         DRM_ERROR("tried to enable vblank on non-existent crtc %u\n",
  92                                   pipe);
  93                         return -EINVAL;
  94                 }
  95         }
  96
  97         return 0;
  98 }
  99
 100 void radeon_disable_vblank(struct drm_device *dev, unsigned int pipe)
 101 {
 102         drm_radeon_private_t *dev_priv = dev->dev_private;
 103
 104         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
 105                 switch (pipe) {
 106                 case 0:
 107                         r500_vbl_irq_set_state(dev, R500_D1MODE_INT_MASK, 0);
 108                         break;
 109                 case 1:
 110                         r500_vbl_irq_set_state(dev, R500_D2MODE_INT_MASK, 0);
 111                         break;
 112                 default:
 113                         DRM_ERROR("tried to enable vblank on non-existent crtc %u\n",
 114                                   pipe);
 115                         break;
 116                 }
 117         } else {
 118                 switch (pipe) {
 119                 case 0:
 120                         radeon_irq_set_state(dev, RADEON_CRTC_VBLANK_MASK, 0);
 121                         break;
 122                 case 1:
 123                         radeon_irq_set_state(dev, RADEON_CRTC2_VBLANK_MASK, 0);
 124                         break;
 125                 default:
 126                         DRM_ERROR("tried to enable vblank on non-existent crtc %u\n",
 127                                   pipe);
 128                         break;
 129                 }
 130         }
 131 }
 132
 133 static u32 radeon_acknowledge_irqs(drm_radeon_private_t *dev_priv, u32 *r500_disp_int)
 134 {
 135         u32 irqs = RADEON_READ(RADEON_GEN_INT_STATUS);
 136         u32 irq_mask = RADEON_SW_INT_TEST;
 137
 138         *r500_disp_int = 0;
 139         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
 140                 /* vbl interrupts in a different place */
 141
 142                 if (irqs & R500_DISPLAY_INT_STATUS) {
 143                         /* if a display interrupt */
 144                         u32 disp_irq;
 145
 146                         disp_irq = RADEON_READ(R500_DISP_INTERRUPT_STATUS);
 147
 148                         *r500_disp_int = disp_irq;
 149                         if (disp_irq & R500_D1_VBLANK_INTERRUPT)
 150                                 RADEON_WRITE(R500_D1MODE_VBLANK_STATUS, R500_VBLANK_ACK);
 151                         if (disp_irq & R500_D2_VBLANK_INTERRUPT)
 152                                 RADEON_WRITE(R500_D2MODE_VBLANK_STATUS, R500_VBLANK_ACK);
 153                 }
 154                 irq_mask |= R500_DISPLAY_INT_STATUS;
 155         } else
 156                 irq_mask |= RADEON_CRTC_VBLANK_STAT | RADEON_CRTC2_VBLANK_STAT;
 157
 158         irqs &= irq_mask;
 159
 160         if (irqs)
 161                 RADEON_WRITE(RADEON_GEN_INT_STATUS, irqs);
 162
 163         return irqs;
 164 }
 165
 166 /* Interrupts - Used for device synchronization and flushing in the
 167  * following circumstances:
 168  *
 169  * - Exclusive FB access with hw idle:
 170  *    - Wait for GUI Idle (?) interrupt, then do normal flush.
 171  *
 172  * - Frame throttling, NV_fence:
 173  *    - Drop marker irq's into command stream ahead of time.
 174  *    - Wait on irq's with lock *not held*
 175  *    - Check each for termination condition
 176  *
 177  * - Internally in cp_getbuffer, etc:
 178  *    - as above, but wait with lock held???
 179  *
 180  * NOTE: These functions are misleadingly named -- the irq's aren't
 181  * tied to dma at all, this is just a hangover from dri prehistory.
 182  */
 183
 184 irqreturn_t radeon_driver_irq_handler(int irq, void *arg)
 185 {
 186         struct drm_device *dev = (struct drm_device *) arg;
 187         drm_radeon_private_t *dev_priv =
 188             (drm_radeon_private_t *) dev->dev_private;
 189         u32 stat;
 190         u32 r500_disp_int;
 191
 192         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 193                 return IRQ_NONE;
 194
 195         /* Only consider the bits we're interested in - others could be used
 196          * outside the DRM
 197          */
 198         stat = radeon_acknowledge_irqs(dev_priv, &r500_disp_int);
 199         if (!stat)
 200                 return IRQ_NONE;
 201
 202         stat &= dev_priv->irq_enable_reg;
 203
 204         /* SW interrupt */
 205         if (stat & RADEON_SW_INT_TEST)
 206                 wake_up(&dev_priv->swi_queue);
 207
 208         /* VBLANK interrupt */
 209         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
 210                 if (r500_disp_int & R500_D1_VBLANK_INTERRUPT)
 211                         drm_handle_vblank(dev, 0);
 212                 if (r500_disp_int & R500_D2_VBLANK_INTERRUPT)
 213                         drm_handle_vblank(dev, 1);
 214         } else {
 215                 if (stat & RADEON_CRTC_VBLANK_STAT)
 216                         drm_handle_vblank(dev, 0);
 217                 if (stat & RADEON_CRTC2_VBLANK_STAT)
 218                         drm_handle_vblank(dev, 1);
 219         }
 220         return IRQ_HANDLED;
 221 }
 222
 223 static int radeon_emit_irq(struct drm_device * dev)
 224 {
 225         drm_radeon_private_t *dev_priv = dev->dev_private;
 226         unsigned int ret;
 227         RING_LOCALS;
 228
 229         atomic_inc(&dev_priv->swi_emitted);
 230         ret = atomic_read(&dev_priv->swi_emitted);
 231
 232         BEGIN_RING(4);
 233         OUT_RING_REG(RADEON_LAST_SWI_REG, ret);
 234         OUT_RING_REG(RADEON_GEN_INT_STATUS, RADEON_SW_INT_FIRE);
 235         ADVANCE_RING();
 236         COMMIT_RING();
 237
 238         return ret;
 239 }
 240
 241 static int radeon_wait_irq(struct drm_device * dev, int swi_nr)
 242 {
 243         drm_radeon_private_t *dev_priv =
 244             (drm_radeon_private_t *) dev->dev_private;
 245         int ret = 0;
 246
 247         if (RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr)
 248                 return 0;
 249
 250         dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
 251
 252         DRM_WAIT_ON(ret, dev_priv->swi_queue, 3 * HZ,
 253                     RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr);
 254
 255         return ret;
 256 }
 257
 258 u32 radeon_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
 259 {
 260         drm_radeon_private_t *dev_priv = dev->dev_private;
 261
 262         if (!dev_priv) {
 263                 DRM_ERROR("called with no initialization\n");
 264                 return -EINVAL;
 265         }
 266
 267         if (pipe > 1) {
 268                 DRM_ERROR("Invalid crtc %u\n", pipe);
 269                 return -EINVAL;
 270         }
 271
 272         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
 273                 if (pipe == 0)
 274                         return RADEON_READ(R500_D1CRTC_FRAME_COUNT);
 275                 else
 276                         return RADEON_READ(R500_D2CRTC_FRAME_COUNT);
 277         } else {
 278                 if (pipe == 0)
 279                         return RADEON_READ(RADEON_CRTC_CRNT_FRAME);
 280                 else
 281                         return RADEON_READ(RADEON_CRTC2_CRNT_FRAME);
 282         }
 283 }
 284
 285 /* Needs the lock as it touches the ring.
 286  */
 287 int radeon_irq_emit(struct drm_device *dev, void *data, struct drm_file *file_priv)
 288 {
 289         drm_radeon_private_t *dev_priv = dev->dev_private;
 290         drm_radeon_irq_emit_t *emit = data;
 291         int result;
 292
 293         if (!dev_priv) {
 294                 DRM_ERROR("called with no initialization\n");
 295                 return -EINVAL;
 296         }
 297
 298         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 299                 return -EINVAL;
 300
 301         LOCK_TEST_WITH_RETURN(dev, file_priv);
 302
 303         result = radeon_emit_irq(dev);
 304
 305         if (copy_to_user(emit->irq_seq, &result, sizeof(int))) {
 306                 DRM_ERROR("copy_to_user\n");
 307                 return -EFAULT;
 308         }
 309
 310         return 0;
 311 }
 312
 313 /* Doesn't need the hardware lock.
 314  */
 315 int radeon_irq_wait(struct drm_device *dev, void *data, struct drm_file *file_priv)
 316 {
 317         drm_radeon_private_t *dev_priv = dev->dev_private;
 318         drm_radeon_irq_wait_t *irqwait = data;
 319
 320         if (!dev_priv) {
 321                 DRM_ERROR("called with no initialization\n");
 322                 return -EINVAL;
 323         }
 324
 325         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 326                 return -EINVAL;
 327
 328         return radeon_wait_irq(dev, irqwait->irq_seq);
 329 }
 330
 331 /* drm_dma.h hooks
 332 */
 333 void radeon_driver_irq_preinstall(struct drm_device * dev)
 334 {
 335         drm_radeon_private_t *dev_priv =
 336             (drm_radeon_private_t *) dev->dev_private;
 337         u32 dummy;
 338
 339         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 340                 return;
 341
 342         /* Disable *all* interrupts */
 343         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600)
 344                 RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
 345         RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
 346
 347         /* Clear bits if they're already high */
 348         radeon_acknowledge_irqs(dev_priv, &dummy);
 349 }
 350
 351 int radeon_driver_irq_postinstall(struct drm_device *dev)
 352 {
 353         drm_radeon_private_t *dev_priv =
 354             (drm_radeon_private_t *) dev->dev_private;
 355
 356         atomic_set(&dev_priv->swi_emitted, 0);
 357         init_waitqueue_head(&dev_priv->swi_queue);
 358
 359         dev->max_vblank_count = 0x001fffff;
 360
 361         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 362                 return 0;
 363
 364         radeon_irq_set_state(dev, RADEON_SW_INT_ENABLE, 1);
 365
 366         return 0;
 367 }
 368
 369 void radeon_driver_irq_uninstall(struct drm_device * dev)
 370 {
 371         drm_radeon_private_t *dev_priv =
 372             (drm_radeon_private_t *) dev->dev_private;
 373         if (!dev_priv)
 374                 return;
 375
 376         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 377                 return;
 378
 379         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600)
 380                 RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
 381         /* Disable *all* interrupts */
 382         RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
 383 }
 384
 385
 386 int radeon_vblank_crtc_get(struct drm_device *dev)
 387 {
 388         drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private;
 389
 390         return dev_priv->vblank_crtc;
 391 }
 392
 393 int radeon_vblank_crtc_set(struct drm_device *dev, int64_t value)
 394 {
 395         drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private;
 396         if (value & ~(DRM_RADEON_VBLANK_CRTC1 | DRM_RADEON_VBLANK_CRTC2)) {
 397                 DRM_ERROR("called with invalid crtc 0x%x\n", (unsigned int)value);
 398                 return -EINVAL;
 399         }
 400         dev_priv->vblank_crtc = (unsigned int)value;
 401         return 0;
 402 }