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xserver-multidpi/hw/xfree86/dri2/dri2.c
Jesse Barnes 87ca6320f2 DRI2: handle swap_interval of 0 correctly 
A 0 swap interval means that swaps shouldn't be sync'd to vblank, so
just complete the swap immediately in that case.

Reviewed-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-03-29 10:02:30 -07:00

967 lines
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/*
* Copyright © 2007, 2008 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Soft-
* ware"), to deal in the Software without restriction, including without
* limitation the rights to use, copy, modify, merge, publish, distribute,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, provided that the above copyright
* notice(s) and this permission notice appear in all copies of the Soft-
* ware and that both the above copyright notice(s) and this permission
* notice appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
* ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
* RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
* THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
* QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
* MANCE OF THIS SOFTWARE.
*
* Except as contained in this notice, the name of a copyright holder shall
* not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization of
* the copyright holder.
*
* Authors:
* Kristian Høgsberg (krh@redhat.com)
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <errno.h>
#include <xf86drm.h>
#include "xf86Module.h"
#include "scrnintstr.h"
#include "windowstr.h"
#include "dixstruct.h"
#include "dri2.h"
#include "xf86VGAarbiter.h"
#include "xf86.h"
static int dri2ScreenPrivateKeyIndex;
static DevPrivateKey dri2ScreenPrivateKey = &dri2ScreenPrivateKeyIndex;
static int dri2WindowPrivateKeyIndex;
static DevPrivateKey dri2WindowPrivateKey = &dri2WindowPrivateKeyIndex;
static int dri2PixmapPrivateKeyIndex;
static DevPrivateKey dri2PixmapPrivateKey = &dri2PixmapPrivateKeyIndex;
typedef struct _DRI2Drawable {
unsigned int refCount;
int width;
int height;
DRI2BufferPtr *buffers;
int bufferCount;
unsigned int swapsPending;
ClientPtr blockedClient;
int swap_interval;
CARD64 swap_count;
int64_t target_sbc; /* -1 means no SBC wait outstanding */
CARD64 last_swap_target; /* most recently queued swap target */
CARD64 last_swap_msc; /* msc at completion of most recent swap */
CARD64 last_swap_ust; /* ust at completion of most recent swap */
int swap_limit; /* for N-buffering */
} DRI2DrawableRec, *DRI2DrawablePtr;
typedef struct _DRI2Screen *DRI2ScreenPtr;
typedef struct _DRI2Screen {
unsigned int numDrivers;
const char **driverNames;
const char *deviceName;
int fd;
unsigned int lastSequence;
DRI2CreateBufferProcPtr CreateBuffer;
DRI2DestroyBufferProcPtr DestroyBuffer;
DRI2CopyRegionProcPtr CopyRegion;
DRI2ScheduleSwapProcPtr ScheduleSwap;
DRI2GetMSCProcPtr GetMSC;
DRI2ScheduleWaitMSCProcPtr ScheduleWaitMSC;
HandleExposuresProcPtr HandleExposures;
} DRI2ScreenRec;
static DRI2ScreenPtr
DRI2GetScreen(ScreenPtr pScreen)
{
return dixLookupPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey);
}
static DRI2DrawablePtr
DRI2GetDrawable(DrawablePtr pDraw)
{
WindowPtr pWin;
PixmapPtr pPixmap;
if (!pDraw)
return NULL;
if (pDraw->type == DRAWABLE_WINDOW)
{
pWin = (WindowPtr) pDraw;
return dixLookupPrivate(&pWin->devPrivates, dri2WindowPrivateKey);
}
else
{
pPixmap = (PixmapPtr) pDraw;
return dixLookupPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey);
}
}
int
DRI2CreateDrawable(DrawablePtr pDraw)
{
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
WindowPtr pWin;
PixmapPtr pPixmap;
DRI2DrawablePtr pPriv;
CARD64 ust;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv != NULL)
{
pPriv->refCount++;
return Success;
}
pPriv = xalloc(sizeof *pPriv);
if (pPriv == NULL)
return BadAlloc;
pPriv->refCount = 1;
pPriv->width = pDraw->width;
pPriv->height = pDraw->height;
pPriv->buffers = NULL;
pPriv->bufferCount = 0;
pPriv->swapsPending = 0;
pPriv->blockedClient = NULL;
pPriv->swap_count = 0;
pPriv->target_sbc = -1;
pPriv->swap_interval = 1;
/* Initialize last swap target from DDX if possible */
if (!ds->GetMSC || !(*ds->GetMSC)(pDraw, &ust, &pPriv->last_swap_target))
pPriv->last_swap_target = 0;
pPriv->swap_limit = 1; /* default to double buffering */
pPriv->last_swap_msc = 0;
pPriv->last_swap_ust = 0;
if (pDraw->type == DRAWABLE_WINDOW)
{
pWin = (WindowPtr) pDraw;
dixSetPrivate(&pWin->devPrivates, dri2WindowPrivateKey, pPriv);
}
else
{
pPixmap = (PixmapPtr) pDraw;
dixSetPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey, pPriv);
}
return Success;
}
static void
DRI2FreeDrawable(DrawablePtr pDraw)
{
DRI2DrawablePtr pPriv;
WindowPtr pWin;
PixmapPtr pPixmap;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL)
return;
xfree(pPriv);
if (pDraw->type == DRAWABLE_WINDOW)
{
pWin = (WindowPtr) pDraw;
dixSetPrivate(&pWin->devPrivates, dri2WindowPrivateKey, NULL);
}
else
{
pPixmap = (PixmapPtr) pDraw;
dixSetPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey, NULL);
}
}
static int
find_attachment(DRI2DrawablePtr pPriv, unsigned attachment)
{
int i;
if (pPriv->buffers == NULL) {
return -1;
}
for (i = 0; i < pPriv->bufferCount; i++) {
if ((pPriv->buffers[i] != NULL)
&& (pPriv->buffers[i]->attachment == attachment)) {
return i;
}
}
return -1;
}
static Bool
allocate_or_reuse_buffer(DrawablePtr pDraw, DRI2ScreenPtr ds,
DRI2DrawablePtr pPriv,
unsigned int attachment, unsigned int format,
int dimensions_match, DRI2BufferPtr *buffer)
{
int old_buf = find_attachment(pPriv, attachment);
if ((old_buf < 0)
|| !dimensions_match
|| (pPriv->buffers[old_buf]->format != format)) {
*buffer = (*ds->CreateBuffer)(pDraw, attachment, format);
return TRUE;
} else {
*buffer = pPriv->buffers[old_buf];
pPriv->buffers[old_buf] = NULL;
return FALSE;
}
}
static DRI2BufferPtr *
do_get_buffers(DrawablePtr pDraw, int *width, int *height,
unsigned int *attachments, int count, int *out_count,
int has_format)
{
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
DRI2DrawablePtr pPriv = DRI2GetDrawable(pDraw);
DRI2BufferPtr *buffers;
int need_real_front = 0;
int need_fake_front = 0;
int have_fake_front = 0;
int front_format = 0;
int dimensions_match;
int buffers_changed = 0;
int i;
if (!pPriv) {
*width = pDraw->width;
*height = pDraw->height;
*out_count = 0;
return NULL;
}
dimensions_match = (pDraw->width == pPriv->width)
&& (pDraw->height == pPriv->height);
buffers = xalloc((count + 1) * sizeof(buffers[0]));
for (i = 0; i < count; i++) {
const unsigned attachment = *(attachments++);
const unsigned format = (has_format) ? *(attachments++) : 0;
if (allocate_or_reuse_buffer(pDraw, ds, pPriv, attachment,
format, dimensions_match,
&buffers[i]))
buffers_changed = 1;
/* If the drawable is a window and the front-buffer is requested,
* silently add the fake front-buffer to the list of requested
* attachments. The counting logic in the loop accounts for the case
* where the client requests both the fake and real front-buffer.
*/
if (attachment == DRI2BufferBackLeft) {
need_real_front++;
front_format = format;
}
if (attachment == DRI2BufferFrontLeft) {
need_real_front--;
front_format = format;
if (pDraw->type == DRAWABLE_WINDOW) {
need_fake_front++;
}
}
if (pDraw->type == DRAWABLE_WINDOW) {
if (attachment == DRI2BufferFakeFrontLeft) {
need_fake_front--;
have_fake_front = 1;
}
}
}
if (need_real_front > 0) {
if (allocate_or_reuse_buffer(pDraw, ds, pPriv, DRI2BufferFrontLeft,
front_format, dimensions_match,
&buffers[i++]))
buffers_changed = 1;
}
if (need_fake_front > 0) {
if (allocate_or_reuse_buffer(pDraw, ds, pPriv, DRI2BufferFakeFrontLeft,
front_format, dimensions_match,
&buffers[i++]))
buffers_changed = 1;
have_fake_front = 1;
}
*out_count = i;
if (pPriv->buffers != NULL) {
for (i = 0; i < pPriv->bufferCount; i++) {
if (pPriv->buffers[i] != NULL) {
(*ds->DestroyBuffer)(pDraw, pPriv->buffers[i]);
}
}
xfree(pPriv->buffers);
}
pPriv->buffers = buffers;
pPriv->bufferCount = *out_count;
pPriv->width = pDraw->width;
pPriv->height = pDraw->height;
*width = pPriv->width;
*height = pPriv->height;
/* If the client is getting a fake front-buffer, pre-fill it with the
* contents of the real front-buffer. This ensures correct operation of
* applications that call glXWaitX before calling glDrawBuffer.
*/
if (have_fake_front && buffers_changed) {
BoxRec box;
RegionRec region;
box.x1 = 0;
box.y1 = 0;
box.x2 = pPriv->width;
box.y2 = pPriv->height;
REGION_INIT(pDraw->pScreen, &region, &box, 0);
DRI2CopyRegion(pDraw, &region, DRI2BufferFakeFrontLeft,
DRI2BufferFrontLeft);
}
return pPriv->buffers;
}
DRI2BufferPtr *
DRI2GetBuffers(DrawablePtr pDraw, int *width, int *height,
unsigned int *attachments, int count, int *out_count)
{
return do_get_buffers(pDraw, width, height, attachments, count,
out_count, FALSE);
}
DRI2BufferPtr *
DRI2GetBuffersWithFormat(DrawablePtr pDraw, int *width, int *height,
unsigned int *attachments, int count, int *out_count)
{
return do_get_buffers(pDraw, width, height, attachments, count,
out_count, TRUE);
}
/*
* In the direct rendered case, we throttle the clients that have more
* than their share of outstanding swaps (and thus busy buffers) when a
* new GetBuffers request is received. In the AIGLX case, we allow the
* client to get the new buffers, but throttle when the next GLX request
* comes in (see __glXDRIcontextWait()).
*/
Bool
DRI2ThrottleClient(ClientPtr client, DrawablePtr pDraw)
{
DRI2DrawablePtr pPriv;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL)
return FALSE;
/* Throttle to swap limit */
if ((pPriv->swapsPending >= pPriv->swap_limit) &&
!pPriv->blockedClient) {
ResetCurrentRequest(client);
client->sequence--;
IgnoreClient(client);
pPriv->blockedClient = client;
return TRUE;
}
return FALSE;
}
void
DRI2BlockClient(ClientPtr client, DrawablePtr pDraw)
{
DRI2DrawablePtr pPriv;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL)
return;
if (pPriv->blockedClient == NULL) {
IgnoreClient(client);
pPriv->blockedClient = client;
}
}
int
DRI2CopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
unsigned int dest, unsigned int src)
{
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
DRI2DrawablePtr pPriv;
DRI2BufferPtr pDestBuffer, pSrcBuffer;
int i;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL)
return BadDrawable;
pDestBuffer = NULL;
pSrcBuffer = NULL;
for (i = 0; i < pPriv->bufferCount; i++)
{
if (pPriv->buffers[i]->attachment == dest)
pDestBuffer = (DRI2BufferPtr) pPriv->buffers[i];
if (pPriv->buffers[i]->attachment == src)
pSrcBuffer = (DRI2BufferPtr) pPriv->buffers[i];
}
if (pSrcBuffer == NULL || pDestBuffer == NULL)
return BadValue;
(*ds->CopyRegion)(pDraw, pRegion, pDestBuffer, pSrcBuffer);
return Success;
}
/* Can this drawable be page flipped? */
Bool
DRI2CanFlip(DrawablePtr pDraw)
{
ScreenPtr pScreen = pDraw->pScreen;
WindowPtr pWin, pRoot;
PixmapPtr pWinPixmap, pRootPixmap;
if (pDraw->type == DRAWABLE_PIXMAP)
return TRUE;
pRoot = WindowTable[pScreen->myNum];
pRootPixmap = pScreen->GetWindowPixmap(pRoot);
pWin = (WindowPtr) pDraw;
pWinPixmap = pScreen->GetWindowPixmap(pWin);
if (pRootPixmap != pWinPixmap)
return FALSE;
if (!REGION_EQUAL(pScreen, &pWin->clipList, &pRoot->winSize))
return FALSE;
return TRUE;
}
/* Can we do a pixmap exchange instead of a blit? */
Bool
DRI2CanExchange(DrawablePtr pDraw)
{
return FALSE;
}
void
DRI2WaitMSCComplete(ClientPtr client, DrawablePtr pDraw, int frame,
unsigned int tv_sec, unsigned int tv_usec)
{
DRI2DrawablePtr pPriv;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL)
return;
ProcDRI2WaitMSCReply(client, ((CARD64)tv_sec * 1000000) + tv_usec,
frame, pPriv->swap_count);
if (pPriv->blockedClient)
AttendClient(pPriv->blockedClient);
pPriv->blockedClient = NULL;
/* If there's still a swap pending, let DRI2SwapComplete free it */
if (pPriv->refCount == 0 && pPriv->swapsPending == 0)
DRI2FreeDrawable(pDraw);
}
static void
DRI2WakeClient(ClientPtr client, DrawablePtr pDraw, int frame,
unsigned int tv_sec, unsigned int tv_usec)
{
ScreenPtr pScreen = pDraw->pScreen;
DRI2DrawablePtr pPriv;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL) {
xf86DrvMsg(pScreen->myNum, X_ERROR,
"[DRI2] %s: bad drawable\n", __func__);
return;
}
/*
* Swap completed. Either wake up an SBC waiter or a client that was
* blocked due to GLX activity during a swap.
*/
if (pPriv->target_sbc != -1 &&
pPriv->target_sbc <= pPriv->swap_count) {
ProcDRI2WaitMSCReply(client, ((CARD64)tv_sec * 1000000) + tv_usec,
frame, pPriv->swap_count);
pPriv->target_sbc = -1;
AttendClient(pPriv->blockedClient);
pPriv->blockedClient = NULL;
} else if (pPriv->target_sbc == -1) {
if (pPriv->blockedClient)
AttendClient(pPriv->blockedClient);
pPriv->blockedClient = NULL;
}
}
void
DRI2SwapComplete(ClientPtr client, DrawablePtr pDraw, int frame,
unsigned int tv_sec, unsigned int tv_usec, int type,
DRI2SwapEventPtr swap_complete, void *swap_data)
{
ScreenPtr pScreen = pDraw->pScreen;
DRI2DrawablePtr pPriv;
CARD64 ust = 0;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL) {
xf86DrvMsg(pScreen->myNum, X_ERROR,
"[DRI2] %s: bad drawable\n", __func__);
return;
}
pPriv->swapsPending--;
pPriv->swap_count++;
ust = ((CARD64)tv_sec * 1000000) + tv_usec;
if (swap_complete)
swap_complete(client, swap_data, type, ust, frame, pPriv->swap_count);
pPriv->last_swap_msc = frame;
pPriv->last_swap_ust = ust;
DRI2WakeClient(client, pDraw, frame, tv_sec, tv_usec);
/*
* It's normal for the app to have exited with a swap outstanding, but
* don't free the drawable until they're all complete.
*/
if (pPriv->swapsPending == 0 && pPriv->refCount == 0)
DRI2FreeDrawable(pDraw);
}
Bool
DRI2WaitSwap(ClientPtr client, DrawablePtr pDrawable)
{
DRI2DrawablePtr pPriv = DRI2GetDrawable(pDrawable);
/* If we're currently waiting for a swap on this drawable, reset
* the request and suspend the client. We only support one
* blocked client per drawable. */
if ((pPriv->swapsPending) &&
pPriv->blockedClient == NULL) {
ResetCurrentRequest(client);
client->sequence--;
DRI2BlockClient(client, pDrawable);
return TRUE;
}
return FALSE;
}
int
DRI2SwapBuffers(ClientPtr client, DrawablePtr pDraw, CARD64 target_msc,
CARD64 divisor, CARD64 remainder, CARD64 *swap_target,
DRI2SwapEventPtr func, void *data)
{
ScreenPtr pScreen = pDraw->pScreen;
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
DRI2DrawablePtr pPriv;
DRI2BufferPtr pDestBuffer = NULL, pSrcBuffer = NULL;
int ret, i;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL) {
xf86DrvMsg(pScreen->myNum, X_ERROR,
"[DRI2] %s: bad drawable\n", __func__);
return BadDrawable;
}
for (i = 0; i < pPriv->bufferCount; i++) {
if (pPriv->buffers[i]->attachment == DRI2BufferFrontLeft)
pDestBuffer = (DRI2BufferPtr) pPriv->buffers[i];
if (pPriv->buffers[i]->attachment == DRI2BufferBackLeft)
pSrcBuffer = (DRI2BufferPtr) pPriv->buffers[i];
}
if (pSrcBuffer == NULL || pDestBuffer == NULL) {
xf86DrvMsg(pScreen->myNum, X_ERROR,
"[DRI2] %s: drawable has no back or front?\n", __func__);
return BadDrawable;
}
/* Old DDX or no swap interval, just blit */
if (!ds->ScheduleSwap || !pPriv->swap_interval) {
BoxRec box;
RegionRec region;
box.x1 = 0;
box.y1 = 0;
box.x2 = pDraw->width;
box.y2 = pDraw->height;
REGION_INIT(pScreen, &region, &box, 0);
pPriv->swapsPending++;
(*ds->CopyRegion)(pDraw, &region, pDestBuffer, pSrcBuffer);
DRI2SwapComplete(client, pDraw, target_msc, 0, 0, DRI2_BLIT_COMPLETE,
func, data);
return Success;
}
/*
* In the simple glXSwapBuffers case, all params will be 0, and we just
* need to schedule a swap for the last swap target + the swap interval.
*/
if (target_msc == 0 && divisor == 0 && remainder == 0) {
/*
* Swap target for this swap is last swap target + swap interval since
* we have to account for the current swap count, interval, and the
* number of pending swaps.
*/
*swap_target = pPriv->last_swap_target + pPriv->swap_interval;
} else {
/* glXSwapBuffersMscOML could have a 0 target_msc, honor it */
*swap_target = target_msc;
}
ret = (*ds->ScheduleSwap)(client, pDraw, pDestBuffer, pSrcBuffer,
swap_target, divisor, remainder, func, data);
if (!ret) {
xf86DrvMsg(pScreen->myNum, X_ERROR,
"[DRI2] %s: driver failed to schedule swap\n", __func__);
return BadDrawable;
}
pPriv->swapsPending++;
pPriv->last_swap_target = *swap_target;
/* According to spec, return expected swapbuffers count SBC after this swap
* will complete.
*/
*swap_target = pPriv->swap_count + pPriv->swapsPending;
return Success;
}
void
DRI2SwapInterval(DrawablePtr pDrawable, int interval)
{
ScreenPtr pScreen = pDrawable->pScreen;
DRI2DrawablePtr pPriv = DRI2GetDrawable(pDrawable);
if (pPriv == NULL) {
xf86DrvMsg(pScreen->myNum, X_ERROR,
"[DRI2] %s: bad drawable\n", __func__);
return;
}
/* fixme: check against arbitrary max? */
pPriv->swap_interval = interval;
}
int
DRI2GetMSC(DrawablePtr pDraw, CARD64 *ust, CARD64 *msc, CARD64 *sbc)
{
ScreenPtr pScreen = pDraw->pScreen;
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
DRI2DrawablePtr pPriv;
Bool ret;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL) {
xf86DrvMsg(pScreen->myNum, X_ERROR,
"[DRI2] %s: bad drawable\n", __func__);
return BadDrawable;
}
if (!ds->GetMSC) {
*ust = 0;
*msc = 0;
*sbc = pPriv->swap_count;
return Success;
}
/*
* Spec needs to be updated to include unmapped or redirected
* drawables
*/
ret = (*ds->GetMSC)(pDraw, ust, msc);
if (!ret)
return BadDrawable;
*sbc = pPriv->swap_count;
return Success;
}
int
DRI2WaitMSC(ClientPtr client, DrawablePtr pDraw, CARD64 target_msc,
CARD64 divisor, CARD64 remainder)
{
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
DRI2DrawablePtr pPriv;
Bool ret;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL || pPriv->refCount == 0)
return BadDrawable;
/* Old DDX just completes immediately */
if (!ds->ScheduleWaitMSC) {
DRI2WaitMSCComplete(client, pDraw, target_msc, 0, 0);
return Success;
}
ret = (*ds->ScheduleWaitMSC)(client, pDraw, target_msc, divisor, remainder);
if (!ret)
return BadDrawable;
return Success;
}
int
DRI2WaitSBC(ClientPtr client, DrawablePtr pDraw, CARD64 target_sbc,
CARD64 *ust, CARD64 *msc, CARD64 *sbc)
{
DRI2DrawablePtr pPriv;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL || pPriv->refCount == 0)
return BadDrawable;
/* target_sbc == 0 means to block until all pending swaps are
* finished. Recalculate target_sbc to get that behaviour.
*/
if (target_sbc == 0)
target_sbc = pPriv->swap_count + pPriv->swapsPending;
/* If current swap count already >= target_sbc,
* return immediately with (ust, msc, sbc) triplet of
* most recent completed swap.
*/
if (pPriv->swap_count >= target_sbc) {
*sbc = pPriv->swap_count;
*msc = pPriv->last_swap_msc;
*ust = pPriv->last_swap_ust;
return Success;
}
pPriv->target_sbc = target_sbc;
DRI2BlockClient(client, pDraw);
return Success;
}
void
DRI2DestroyDrawable(DrawablePtr pDraw)
{
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
DRI2DrawablePtr pPriv;
pPriv = DRI2GetDrawable(pDraw);
if (pPriv == NULL)
return;
pPriv->refCount--;
if (pPriv->refCount > 0)
return;
if (pPriv->buffers != NULL) {
int i;
for (i = 0; i < pPriv->bufferCount; i++)
(*ds->DestroyBuffer)(pDraw, pPriv->buffers[i]);
xfree(pPriv->buffers);
}
/* If the window is destroyed while we have a swap or wait pending, don't
* actually free the priv yet. We'll need it in the DRI2SwapComplete()
* callback and we'll free it there once we're done. */
if (!pPriv->swapsPending && !pPriv->blockedClient)
DRI2FreeDrawable(pDraw);
}
Bool
DRI2Connect(ScreenPtr pScreen, unsigned int driverType, int *fd,
const char **driverName, const char **deviceName)
{
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
if (ds == NULL || driverType >= ds->numDrivers ||
!ds->driverNames[driverType])
return FALSE;
*fd = ds->fd;
*driverName = ds->driverNames[driverType];
*deviceName = ds->deviceName;
return TRUE;
}
Bool
DRI2Authenticate(ScreenPtr pScreen, drm_magic_t magic)
{
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
if (ds == NULL || drmAuthMagic(ds->fd, magic))
return FALSE;
return TRUE;
}
Bool
DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
{
DRI2ScreenPtr ds;
const char* driverTypeNames[] = {
"DRI", /* DRI2DriverDRI */
"VDPAU", /* DRI2DriverVDPAU */
};
unsigned int i;
if (info->version < 3)
return FALSE;
if (!xf86VGAarbiterAllowDRI(pScreen)) {
xf86DrvMsg(pScreen->myNum, X_WARNING,
"[DRI2] Direct rendering is not supported when VGA arb is necessary for the device\n");
return FALSE;
}
ds = xcalloc(1, sizeof *ds);
if (!ds)
return FALSE;
ds->fd = info->fd;
ds->deviceName = info->deviceName;
ds->CreateBuffer = info->CreateBuffer;
ds->DestroyBuffer = info->DestroyBuffer;
ds->CopyRegion = info->CopyRegion;
if (info->version >= 4) {
ds->ScheduleSwap = info->ScheduleSwap;
ds->ScheduleWaitMSC = info->ScheduleWaitMSC;
ds->GetMSC = info->GetMSC;
}
if (info->version == 3 || info->numDrivers == 0) {
/* Driver too old: use the old-style driverName field */
ds->numDrivers = 1;
ds->driverNames = xalloc(sizeof(*ds->driverNames));
if (!ds->driverNames) {
xfree(ds);
return FALSE;
}
ds->driverNames[0] = info->driverName;
} else {
ds->numDrivers = info->numDrivers;
ds->driverNames = xalloc(info->numDrivers * sizeof(*ds->driverNames));
if (!ds->driverNames) {
xfree(ds);
return FALSE;
}
memcpy(ds->driverNames, info->driverNames,
info->numDrivers * sizeof(*ds->driverNames));
}
dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, ds);
xf86DrvMsg(pScreen->myNum, X_INFO, "[DRI2] Setup complete\n");
for (i = 0; i < sizeof(driverTypeNames) / sizeof(driverTypeNames[0]); i++) {
if (i < ds->numDrivers && ds->driverNames[i]) {
xf86DrvMsg(pScreen->myNum, X_INFO, "[DRI2] %s driver: %s\n",
driverTypeNames[i], ds->driverNames[i]);
}
}
return TRUE;
}
void
DRI2CloseScreen(ScreenPtr pScreen)
{
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
xfree(ds->driverNames);
xfree(ds);
dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, NULL);
}
extern ExtensionModule dri2ExtensionModule;
static pointer
DRI2Setup(pointer module, pointer opts, int *errmaj, int *errmin)
{
static Bool setupDone = FALSE;
if (!setupDone)
{
setupDone = TRUE;
LoadExtension(&dri2ExtensionModule, FALSE);
}
else
{
if (errmaj)
*errmaj = LDR_ONCEONLY;
}
return (pointer) 1;
}
static XF86ModuleVersionInfo DRI2VersRec =
{
"dri2",
MODULEVENDORSTRING,
MODINFOSTRING1,
MODINFOSTRING2,
XORG_VERSION_CURRENT,
1, 2, 0,
ABI_CLASS_EXTENSION,
ABI_EXTENSION_VERSION,
MOD_CLASS_NONE,
{ 0, 0, 0, 0 }
};
_X_EXPORT XF86ModuleData dri2ModuleData = { &DRI2VersRec, DRI2Setup, NULL };
void
DRI2Version(int *major, int *minor)
{
if (major != NULL)
*major = DRI2VersRec.majorversion;
if (minor != NULL)
*minor = DRI2VersRec.minorversion;
}
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