sys/dev/drm/drm_irq.h

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