src/mesa/drivers/dri/i965/intel_ioctl.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include <stdio.h>
  30 #include <unistd.h>
  31 #include <errno.h>
  32 #include <sched.h>
  33
  34 #include "mtypes.h"
  35 #include "context.h"
  36 #include "swrast/swrast.h"
  37
  38 #include "intel_context.h"
  39 #include "intel_ioctl.h"
  40 #include "intel_batchbuffer.h"
  41 #include "intel_blit.h"
  42 #include "intel_regions.h"
  43 #include "drm.h"
  44 #include "bufmgr.h"
  45
  46 static int intelWaitIdleLocked( struct intel_context *intel )
  47 {
  48    static int in_wait_idle = 0;
  49    unsigned int fence;
  50
  51    if (!in_wait_idle) {
  52       if (INTEL_DEBUG & DEBUG_SYNC) {
  53          fprintf(stderr, "waiting for idle\n");
  54       }
  55
  56       in_wait_idle = 1;
  57       fence = bmSetFence(intel);
  58       intelWaitIrq(intel, fence);
  59       in_wait_idle = 0;
  60
  61       return bmTestFence(intel, fence);
  62    } else {
  63       return 1;
  64    }
  65 }
  66
  67 int intelEmitIrqLocked( struct intel_context *intel )
  68 {
  69    int seq = 1;
  70
  71    if (!intel->no_hw) {
  72       drmI830IrqEmit ie;
  73       int ret;
  74
  75       assert(((*(int *)intel->driHwLock) & ~DRM_LOCK_CONT) ==
  76              (DRM_LOCK_HELD|intel->hHWContext));
  77
  78       ie.irq_seq = &seq;
  79
  80       ret = drmCommandWriteRead( intel->driFd, DRM_I830_IRQ_EMIT,
  81                                  &ie, sizeof(ie) );
  82       if ( ret ) {
  83          fprintf( stderr, "%s: drmI830IrqEmit: %d\n", __FUNCTION__, ret );
  84          exit(1);
  85       }
  86
  87       if (0)
  88          fprintf(stderr, "%s -->  %d\n", __FUNCTION__, seq );
  89    }
  90
  91    return seq;
  92 }
  93
  94 void intelWaitIrq( struct intel_context *intel, int seq )
  95 {
  96    if (!intel->no_hw) {
  97       drmI830IrqWait iw;
  98       int ret, lastdispatch;
  99
 100       if (0)
 101          fprintf(stderr, "%s %d\n", __FUNCTION__, seq );
 102
 103       iw.irq_seq = seq;
 104
 105       do {
 106          lastdispatch = intel->sarea->last_dispatch;
 107          ret = drmCommandWrite( intel->driFd, DRM_I830_IRQ_WAIT, &iw, sizeof(iw) );
 108
 109          /* This seems quite often to return before it should!?!
 110           */
 111       } while (ret == -EAGAIN || ret == -EINTR || (ret == -EBUSY && lastdispatch != intel->sarea->last_dispatch) || (ret == 0 && seq > intel->sarea->last_dispatch)
 112                || (ret == 0 && intel->sarea->last_dispatch - seq >= (1 << 24)));
 113
 114
 115       if ( ret ) {
 116          fprintf( stderr, "%s: drmI830IrqWait: %d\n", __FUNCTION__, ret );
 117
 118          exit(1);
 119       }
 120    }
 121 }
 122
 123
 124 void intel_batch_ioctl( struct intel_context *intel,
 125                         GLuint start_offset,
 126                         GLuint used)
 127 {
 128    drmI830BatchBuffer batch;
 129
 130    assert(intel->locked);
 131    assert(used);
 132
 133    if (0)
 134       fprintf(stderr, "%s used %d offset %x..%x\n",
 135               __FUNCTION__,
 136               used,
 137               start_offset,
 138               start_offset + used);
 139
 140    batch.start = start_offset;
 141    batch.used = used;
 142    batch.cliprects = NULL;
 143    batch.num_cliprects = 0;
 144    batch.DR1 = 0;
 145    batch.DR4 = 0;
 146
 147    if (INTEL_DEBUG & DEBUG_DMA)
 148       fprintf(stderr, "%s: 0x%x..0x%x\n",
 149               __FUNCTION__,
 150               batch.start,
 151               batch.start + batch.used * 4);
 152
 153    if (!intel->no_hw) {
 154       if (drmCommandWrite (intel->driFd, DRM_I830_BATCHBUFFER, &batch,
 155                            sizeof(batch))) {
 156          fprintf(stderr, "DRM_I830_BATCHBUFFER: %d\n",  -errno);
 157          UNLOCK_HARDWARE(intel);
 158          exit(1);
 159       }
 160
 161       if (INTEL_DEBUG & DEBUG_SYNC) {
 162         intelWaitIdleLocked(intel);
 163       }
 164    }
 165 }
 166
 167 void intel_cmd_ioctl( struct intel_context *intel,
 168                       char *buf,
 169                       GLuint used)
 170 {
 171    drmI830CmdBuffer cmd;
 172
 173    assert(intel->locked);
 174    assert(used);
 175
 176    cmd.buf = buf;
 177    cmd.sz = used;
 178    cmd.cliprects = intel->pClipRects;
 179    cmd.num_cliprects = 0;
 180    cmd.DR1 = 0;
 181    cmd.DR4 = 0;
 182
 183    if (INTEL_DEBUG & DEBUG_DMA)
 184       fprintf(stderr, "%s: 0x%x..0x%x\n",
 185               __FUNCTION__,
 186               0,
 187               0 + cmd.sz);
 188
 189    if (!intel->no_hw) {
 190       if (drmCommandWrite (intel->driFd, DRM_I830_CMDBUFFER, &cmd,
 191                            sizeof(cmd))) {
 192          fprintf(stderr, "DRM_I830_CMDBUFFER: %d\n",  -errno);
 193          UNLOCK_HARDWARE(intel);
 194          exit(1);
 195       }
 196
 197       if (INTEL_DEBUG & DEBUG_SYNC) {
 198         intelWaitIdleLocked(intel);
 199       }
 200    }
 201 }