sys/dev/drm/drm_irq.c

   1 /* drm_dma.c -- DMA IOCTL and function support
   2  * Created: Fri Oct 18 2003 by anholt@FreeBSD.org
   3  */
   4 /*-
   5  * Copyright 2003 Eric Anholt
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * ERIC ANHOLT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  23  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Eric Anholt <anholt@FreeBSD.org>
  28  *
  29  * $FreeBSD$
  30  */
  31
  32 #include "dev/drm/drmP.h"
  33 #include "dev/drm/drm.h"
  34
  35 int drm_irq_by_busid(DRM_IOCTL_ARGS)
  36 {
  37         DRM_DEVICE;
  38         drm_irq_busid_t irq;
  39
  40         DRM_COPY_FROM_USER_IOCTL(irq, (drm_irq_busid_t *)data, sizeof(irq));
  41
  42         if ((irq.busnum >> 8) != dev->pci_domain ||
  43             (irq.busnum & 0xff) != dev->pci_bus ||
  44             irq.devnum != dev->pci_slot ||
  45             irq.funcnum != dev->pci_func)
  46                 return EINVAL;
  47
  48         irq.irq = dev->irq;
  49
  50         DRM_DEBUG("%d:%d:%d => IRQ %d\n",
  51                   irq.busnum, irq.devnum, irq.funcnum, irq.irq);
  52
  53         DRM_COPY_TO_USER_IOCTL( (drm_irq_busid_t *)data, irq, sizeof(irq) );
  54
  55         return 0;
  56 }
  57
  58 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
  59 static irqreturn_t
  60 drm_irq_handler_wrap(DRM_IRQ_ARGS)
  61 {
  62         drm_device_t *dev = (drm_device_t *)arg;
  63
  64         DRM_SPINLOCK(&dev->irq_lock);
  65         dev->irq_handler(arg);
  66         DRM_SPINUNLOCK(&dev->irq_lock);
  67 }
  68 #endif
  69
  70 int drm_irq_install(drm_device_t *dev)
  71 {
  72         int retcode;
  73
  74         if (dev->irq == 0 || dev->dev_private == NULL)
  75                 return DRM_ERR(EINVAL);
  76
  77         DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
  78
  79         DRM_LOCK();
  80         if (dev->irq_enabled) {
  81                 DRM_UNLOCK();
  82                 return DRM_ERR(EBUSY);
  83         }
  84         dev->irq_enabled = 1;
  85
  86         dev->context_flag = 0;
  87
  88         DRM_SPININIT(dev->irq_lock, "DRM IRQ lock");
  89
  90                                 /* Before installing handler */
  91         dev->irq_preinstall(dev);
  92         DRM_UNLOCK();
  93
  94                                 /* Install handler */
  95 #ifdef __FreeBSD__
  96         dev->irqrid = 0;
  97         dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
  98                                       &dev->irqrid, RF_SHAREABLE);
  99         if (!dev->irqr) {
 100                 retcode = ENOENT;
 101                 goto err;
 102         }
 103 #if __FreeBSD_version < 500000
 104         retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY,
 105                                  dev->irq_handler, dev, &dev->irqh);
 106 #else
 107         retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY | INTR_MPSAFE,
 108                                  drm_irq_handler_wrap, dev, &dev->irqh);
 109 #endif
 110         if (retcode != 0)
 111                 goto err;
 112 #elif defined(__NetBSD__) || defined(__OpenBSD__)
 113         if (pci_intr_map(&dev->pa, &dev->ih) != 0) {
 114                 retcode = ENOENT;
 115                 goto err;
 116         }
 117         dev->irqh = pci_intr_establish(&dev->pa.pa_pc, dev->ih, IPL_TTY,
 118             (irqreturn_t (*)(DRM_IRQ_ARGS))dev->irq_handler, dev);
 119         if (!dev->irqh) {
 120                 retcode = ENOENT;
 121                 goto err;
 122         }
 123 #endif
 124
 125                                 /* After installing handler */
 126         DRM_LOCK();
 127         dev->irq_postinstall(dev);
 128         DRM_UNLOCK();
 129
 130         return 0;
 131 err:
 132         DRM_LOCK();
 133         dev->irq_enabled = 0;
 134 #ifdef ___FreeBSD__
 135         if (dev->irqrid != 0) {
 136                 bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
 137                     dev->irqr);
 138                 dev->irqrid = 0;
 139         }
 140 #endif
 141         DRM_SPINUNINIT(dev->irq_lock);
 142         DRM_UNLOCK();
 143         return retcode;
 144 }
 145
 146 int drm_irq_uninstall(drm_device_t *dev)
 147 {
 148         int irqrid;
 149
 150         if (!dev->irq_enabled)
 151                 return DRM_ERR(EINVAL);
 152
 153         dev->irq_enabled = 0;
 154         irqrid = dev->irqrid;
 155         dev->irqrid = 0;
 156
 157         DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
 158
 159         dev->irq_uninstall(dev);
 160
 161 #ifdef __FreeBSD__
 162         DRM_UNLOCK();
 163         bus_teardown_intr(dev->device, dev->irqr, dev->irqh);
 164         bus_release_resource(dev->device, SYS_RES_IRQ, irqrid, dev->irqr);
 165         DRM_LOCK();
 166 #elif defined(__NetBSD__) || defined(__OpenBSD__)
 167         pci_intr_disestablish(&dev->pa.pa_pc, dev->irqh);
 168 #endif
 169         DRM_SPINUNINIT(dev->irq_lock);
 170
 171         return 0;
 172 }
 173
 174 int drm_control(DRM_IOCTL_ARGS)
 175 {
 176         DRM_DEVICE;
 177         drm_control_t ctl;
 178         int err;
 179
 180         DRM_COPY_FROM_USER_IOCTL( ctl, (drm_control_t *) data, sizeof(ctl) );
 181
 182         switch ( ctl.func ) {
 183         case DRM_INST_HANDLER:
 184                 /* Handle drivers whose DRM used to require IRQ setup but the
 185                  * no longer does.
 186                  */
 187                 if (!dev->use_irq)
 188                         return 0;
 189                 if (dev->if_version < DRM_IF_VERSION(1, 2) &&
 190                     ctl.irq != dev->irq)
 191                         return DRM_ERR(EINVAL);
 192                 return drm_irq_install(dev);
 193         case DRM_UNINST_HANDLER:
 194                 if (!dev->use_irq)
 195                         return 0;
 196                 DRM_LOCK();
 197                 err = drm_irq_uninstall(dev);
 198                 DRM_UNLOCK();
 199                 return err;
 200         default:
 201                 return DRM_ERR(EINVAL);
 202         }
 203 }
 204
 205 int drm_wait_vblank(DRM_IOCTL_ARGS)
 206 {
 207         DRM_DEVICE;
 208         drm_wait_vblank_t vblwait;
 209         struct timeval now;
 210         int ret;
 211
 212         if (!dev->irq_enabled)
 213                 return DRM_ERR(EINVAL);
 214
 215         DRM_COPY_FROM_USER_IOCTL( vblwait, (drm_wait_vblank_t *)data,
 216                                   sizeof(vblwait) );
 217
 218         if (vblwait.request.type & _DRM_VBLANK_RELATIVE) {
 219                 vblwait.request.sequence += atomic_read(&dev->vbl_received);
 220                 vblwait.request.type &= ~_DRM_VBLANK_RELATIVE;
 221         }
 222
 223         flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK;
 224         if (flags & _DRM_VBLANK_SIGNAL) {
 225 #if 0 /* disabled */
 226                 drm_vbl_sig_t *vbl_sig = malloc(sizeof(drm_vbl_sig_t), M_DRM,
 227                     M_NOWAIT | M_ZERO);
 228                 if (vbl_sig == NULL)
 229                         return ENOMEM;
 230
 231                 vbl_sig->sequence = vblwait.request.sequence;
 232                 vbl_sig->signo = vblwait.request.signal;
 233                 vbl_sig->pid = DRM_CURRENTPID;
 234
 235                 vblwait.reply.sequence = atomic_read(&dev->vbl_received);
 236
 237                 DRM_SPINLOCK(&dev->irq_lock);
 238                 TAILQ_INSERT_HEAD(&dev->vbl_sig_list, vbl_sig, link);
 239                 DRM_SPINUNLOCK(&dev->irq_lock);
 240                 ret = 0;
 241 #endif
 242                 ret = EINVAL;
 243         } else {
 244                 DRM_LOCK();
 245                 ret = dev->vblank_wait(dev, &vblwait.request.sequence);
 246                 DRM_UNLOCK();
 247
 248                 microtime(&now);
 249                 vblwait.reply.tval_sec = now.tv_sec;
 250                 vblwait.reply.tval_usec = now.tv_usec;
 251         }
 252
 253         DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait,
 254                                 sizeof(vblwait) );
 255
 256         return ret;
 257 }
 258
 259 void drm_vbl_send_signals(drm_device_t *dev)
 260 {
 261 }
 262
 263 #if 0 /* disabled */
 264 void drm_vbl_send_signals( drm_device_t *dev )
 265 {
 266         drm_vbl_sig_t *vbl_sig;
 267         unsigned int vbl_seq = atomic_read( &dev->vbl_received );
 268         struct proc *p;
 269
 270         vbl_sig = TAILQ_FIRST(&dev->vbl_sig_list);
 271         while (vbl_sig != NULL) {
 272                 drm_vbl_sig_t *next = TAILQ_NEXT(vbl_sig, link);
 273
 274                 if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) {
 275                         p = pfind(vbl_sig->pid);
 276                         if (p != NULL)
 277                                 psignal(p, vbl_sig->signo);
 278
 279                         TAILQ_REMOVE(&dev->vbl_sig_list, vbl_sig, link);
 280                         DRM_FREE(vbl_sig,sizeof(*vbl_sig));
 281                 }
 282                 vbl_sig = next;
 283         }
 284 }
 285 #endif