diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c')
-rw-r--r-- | nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c | 347 |
1 files changed, 0 insertions, 347 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c b/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c deleted file mode 100644 index eebe42d96..000000000 --- a/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c +++ /dev/null @@ -1,347 +0,0 @@ -/* -*- mode: c; c-basic-offset: 3 -*- */ -/* - * (c) Copyright IBM Corporation 2002 - * All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * on the rights to use, copy, modify, merge, publish, distribute, sub - * license, and/or sell copies of the Software, and to permit persons to whom - * the Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice (including the next - * paragraph) shall be included in all copies or substantial portions of the - * Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL - * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, - * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR - * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE - * USE OR OTHER DEALINGS IN THE SOFTWARE. - * - * Authors: - * Ian Romanick <idr@us.ibm.com> - */ -/* $XFree86:$ */ - -#include "glheader.h" -#include "xf86drm.h" -#include "mtypes.h" -#include "macros.h" -#include "dd.h" -#include "vblank.h" -#include "xmlpool.h" - - -/****************************************************************************/ -/** - * Get the current MSC refresh counter. - * - * Stores the 64-bit count of vertical refreshes since some (arbitrary) - * point in time in \c count. Unless the value wraps around, which it - * may, it will never decrease. - * - * \warning This function is called from \c glXGetVideoSyncSGI, which expects - * a \c count of type \c unsigned (32-bit), and \c glXGetSyncValuesOML, which - * expects a \c count of type \c int64_t (signed 64-bit). The kernel ioctl - * currently always returns a \c sequence of type \c unsigned. - * - * \param priv Pointer to the DRI screen private struct. - * \param count Storage to hold MSC counter. - * \return Zero is returned on success. A negative errno value - * is returned on failure. - */ -int driGetMSC32( __DRIscreenPrivate * priv, int64_t * count ) -{ - drmVBlank vbl; - int ret; - - /* Don't wait for anything. Just get the current refresh count. */ - - vbl.request.type = DRM_VBLANK_RELATIVE; - vbl.request.sequence = 0; - - ret = drmWaitVBlank( priv->fd, &vbl ); - *count = (int64_t)vbl.reply.sequence; - - return ret; -} - - -/****************************************************************************/ -/** - * Wait for a specified refresh count. This implements most of the - * functionality of \c glXWaitForMscOML from the GLX_OML_sync_control spec. - * Waits for the \c target_msc refresh. If that has already passed, it - * waits until \f$(MSC \bmod divisor)\f$ is equal to \c remainder. If - * \c target_msc is 0, use the behavior of glXWaitVideoSyncSGI(), which - * omits the initial check against a target MSC value. - * - * This function is actually something of a hack. The problem is that, at - * the time of this writing, none of the existing DRM modules support an - * ioctl that returns a 64-bit count (at least not on 32-bit platforms). - * However, this function exists to support a GLX function that requires - * the use of 64-bit counts. As such, there is a little bit of ugly - * hackery at the end of this function to make the 32-bit count act like - * a 64-bit count. There are still some cases where this will break, but - * I believe it catches the most common cases. - * - * The real solution is to provide an ioctl that uses a 64-bit count. - * - * \param dpy Pointer to the \c Display. - * \param priv Pointer to the DRI drawable private. - * \param target_msc Desired refresh count to wait for. A value of 0 - * means to use the glXWaitVideoSyncSGI() behavior. - * \param divisor MSC divisor if \c target_msc is already reached. - * \param remainder Desired MSC remainder if \c target_msc is already - * reached. - * \param msc Buffer to hold MSC when done waiting. - * - * \return Zero on success or \c GLX_BAD_CONTEXT on failure. - */ - -int driWaitForMSC32( __DRIdrawablePrivate *priv, - int64_t target_msc, int64_t divisor, int64_t remainder, - int64_t * msc ) -{ - drmVBlank vbl; - - - if ( divisor != 0 ) { - unsigned int target = (unsigned int)target_msc; - unsigned int next = target; - unsigned int r; - int dont_wait = (target_msc == 0); - - do { - /* dont_wait means we're using the glXWaitVideoSyncSGI() behavior. - * The first time around, just get the current count and proceed - * to the test for (MSC % divisor) == remainder. - */ - vbl.request.type = dont_wait ? DRM_VBLANK_RELATIVE : - DRM_VBLANK_ABSOLUTE; - vbl.request.sequence = next; - - if ( drmWaitVBlank( priv->driScreenPriv->fd, &vbl ) != 0 ) { - /* FIXME: This doesn't seem like the right thing to return here. - */ - return GLX_BAD_CONTEXT; - } - - dont_wait = 0; - if (target_msc != 0 && vbl.reply.sequence == target) - break; - - /* Assuming the wait-done test fails, the next refresh to wait for - * will be one that satisfies (MSC % divisor) == remainder. The - * value (MSC - (MSC % divisor) + remainder) is the refresh value - * closest to the current value that would satisfy the equation. - * If this refresh has already happened, we add divisor to obtain - * the next refresh after the current one that will satisfy it. - */ - r = (vbl.reply.sequence % (unsigned int)divisor); - next = (vbl.reply.sequence - r + (unsigned int)remainder); - if (next <= vbl.reply.sequence) next += (unsigned int)divisor; - - } while ( r != (unsigned int)remainder ); - } - else { - /* If the \c divisor is zero, just wait until the MSC is greater - * than or equal to \c target_msc. - */ - - vbl.request.type = DRM_VBLANK_ABSOLUTE; - vbl.request.sequence = target_msc; - - if ( drmWaitVBlank( priv->driScreenPriv->fd, &vbl ) != 0 ) { - /* FIXME: This doesn't seem like the right thing to return here. - */ - return GLX_BAD_CONTEXT; - } - } - - *msc = (target_msc & 0xffffffff00000000LL); - *msc |= vbl.reply.sequence; - if ( *msc < target_msc ) { - *msc += 0x0000000100000000LL; - } - - return 0; -} - - -/****************************************************************************/ -/** - * Gets a set of default vertical-blank-wait flags based on the internal GLX - * API version and several configuration options. - */ - -GLuint driGetDefaultVBlankFlags( const driOptionCache *optionCache ) -{ - GLuint flags = VBLANK_FLAG_INTERVAL; - int vblank_mode; - - - if ( driCheckOption( optionCache, "vblank_mode", DRI_ENUM ) ) - vblank_mode = driQueryOptioni( optionCache, "vblank_mode" ); - else - vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1; - - switch (vblank_mode) { - case DRI_CONF_VBLANK_NEVER: - flags = 0; - break; - case DRI_CONF_VBLANK_DEF_INTERVAL_0: - break; - case DRI_CONF_VBLANK_DEF_INTERVAL_1: - flags |= VBLANK_FLAG_THROTTLE; - break; - case DRI_CONF_VBLANK_ALWAYS_SYNC: - flags |= VBLANK_FLAG_SYNC; - break; - } - - return flags; -} - - -/****************************************************************************/ -/** - * Sets the default swap interval when the drawable is first bound to a - * direct rendering context. - */ - -void driDrawableInitVBlank( __DRIdrawablePrivate *priv, GLuint flags ) -{ - if ( priv->pdraw->swap_interval == (unsigned)-1 ) { - priv->pdraw->swap_interval = (flags & VBLANK_FLAG_THROTTLE) != 0 ? 1 : 0; - } -} - - -/****************************************************************************/ -/** - * Wrapper to call \c drmWaitVBlank. The main purpose of this function is to - * wrap the error message logging. The error message should only be logged - * the first time the \c drmWaitVBlank fails. If \c drmWaitVBlank is - * successful, \c vbl_seq will be set the sequence value in the reply. - * - * \param vbl Pointer to drmVBlank packet desribing how to wait. - * \param vbl_seq Location to store the current refresh counter. - * \param fd File descriptor use to call into the DRM. - * \return Zero on success or -1 on failure. - */ - -static int do_wait( drmVBlank * vbl, GLuint * vbl_seq, int fd ) -{ - int ret; - - - ret = drmWaitVBlank( fd, vbl ); - if ( ret != 0 ) { - static GLboolean first_time = GL_TRUE; - - if ( first_time ) { - fprintf(stderr, - "%s: drmWaitVBlank returned %d, IRQs don't seem to be" - " working correctly.\nTry running with LIBGL_THROTTLE_REFRESH" - " and LIBL_SYNC_REFRESH unset.\n", __FUNCTION__, ret); - first_time = GL_FALSE; - } - - return -1; - } - - *vbl_seq = vbl->reply.sequence; - return 0; -} - - -/****************************************************************************/ -/** - * Waits for the vertical blank for use with glXSwapBuffers. - * - * \param vbl_seq Vertical blank sequence number (MSC) after the last buffer - * swap. Updated after this wait. - * \param flags \c VBLANK_FLAG bits that control how long to wait. - * \param missed_deadline Set to \c GL_TRUE if the MSC after waiting is later - * than the "target" based on \c flags. The idea is that if - * \c missed_deadline is set, then the application is not - * achieving its desired framerate. - * \return Zero on success, -1 on error. - */ - -int -driWaitForVBlank( const __DRIdrawablePrivate *priv, GLuint * vbl_seq, - GLuint flags, GLboolean * missed_deadline ) -{ - drmVBlank vbl; - unsigned original_seq; - unsigned deadline; - unsigned interval; - - - *missed_deadline = GL_FALSE; - if ( (flags & (VBLANK_FLAG_INTERVAL | - VBLANK_FLAG_THROTTLE | - VBLANK_FLAG_SYNC)) == 0 || - (flags & VBLANK_FLAG_NO_IRQ) != 0 ) { - return 0; - } - - - /* VBLANK_FLAG_SYNC means to wait for at least one vertical blank. If - * that flag is not set, do a fake wait for zero vertical blanking - * periods so that we can get the current MSC. - * - * VBLANK_FLAG_INTERVAL and VBLANK_FLAG_THROTTLE mean to wait for at - * least one vertical blank since the last wait. Since do_wait modifies - * vbl_seq, we have to save the original value of vbl_seq for the - * VBLANK_FLAG_INTERVAL / VBLANK_FLAG_THROTTLE calculation later. - */ - - original_seq = *vbl_seq; - - vbl.request.sequence = ((flags & VBLANK_FLAG_SYNC) != 0) ? 1 : 0; - vbl.request.type = DRM_VBLANK_RELATIVE; - - if ( do_wait( & vbl, vbl_seq, priv->driScreenPriv->fd ) != 0 ) { - return -1; - } - - - vbl.request.type = DRM_VBLANK_ABSOLUTE; - - if ( (flags & VBLANK_FLAG_INTERVAL) != 0 ) { - interval = priv->pdraw->swap_interval; - /* this must have been initialized when the drawable was first bound - * to a direct rendering context. */ - assert ( interval != (unsigned)-1 ); - } - else if ( (flags & VBLANK_FLAG_THROTTLE) != 0 ) { - interval = 1; - } - else { - interval = 0; - } - - - /* Wait until the next vertical blank. If the interval is zero, then - * the deadline is one vertical blank after the previous wait. - */ - - vbl.request.sequence = original_seq + interval; - if ( *vbl_seq < vbl.request.sequence ) { - if ( do_wait( & vbl, vbl_seq, priv->driScreenPriv->fd ) != 0 ) { - return -1; - } - } - - deadline = original_seq + ((interval == 0) ? 1 : interval); - *missed_deadline = ( *vbl_seq > deadline ); - - return 0; -} |