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xenocara/xserver/hw/xfree86/dri2/dri2.c

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/*
* Copyright © 2007 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 <xf86drm.h>
#include "xf86Module.h"
#include "scrnintstr.h"
#include "windowstr.h"
#include "region.h"
#include "damage.h"
#include "dri2.h"
#include <GL/internal/dri_sarea.h>
#include "xf86.h"
static DevPrivateKey dri2ScreenPrivateKey = &dri2ScreenPrivateKey;
static DevPrivateKey dri2WindowPrivateKey = &dri2WindowPrivateKey;
static DevPrivateKey dri2PixmapPrivateKey = &dri2PixmapPrivateKey;
typedef struct _DRI2DrawablePriv {
unsigned int refCount;
unsigned int boHandle;
unsigned int dri2Handle;
} DRI2DrawablePrivRec, *DRI2DrawablePrivPtr;
typedef struct _DRI2Screen {
int fd;
drmBO sareaBO;
void *sarea;
unsigned int sareaSize;
const char *driverName;
unsigned int nextHandle;
__DRIEventBuffer *buffer;
int locked;
DRI2GetPixmapHandleProcPtr getPixmapHandle;
DRI2BeginClipNotifyProcPtr beginClipNotify;
DRI2EndClipNotifyProcPtr endClipNotify;
ClipNotifyProcPtr ClipNotify;
HandleExposuresProcPtr HandleExposures;
} DRI2ScreenRec, *DRI2ScreenPtr;
static DRI2ScreenPtr
DRI2GetScreen(ScreenPtr pScreen)
{
return dixLookupPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey);
}
static void *
DRI2ScreenAllocEvent(DRI2ScreenPtr ds, size_t size)
{
unsigned int *pad, mask = ds->buffer->size - 1;
size_t pad_size;
void *p;
if ((ds->buffer->head & mask) + size > ds->buffer->size) {
/* The requested event size would wrap the buffer, so pad to
* the end and allocate the event from the start. */
pad_size = ds->buffer->size - (ds->buffer->head & mask);
pad = (unsigned int *)
(ds->buffer->data + (ds->buffer->prealloc & mask));
*pad = DRI2_EVENT_HEADER(DRI2_EVENT_PAD, pad_size);
ds->buffer->prealloc += pad_size;
}
p = ds->buffer->data + (ds->buffer->prealloc & mask);
ds->buffer->prealloc += size;
return p;
}
static void
DRI2ScreenCommitEvents(DRI2ScreenPtr ds)
{
ds->buffer->head = ds->buffer->prealloc;
}
static void
DRI2PostDrawableConfig(DrawablePtr pDraw)
{
ScreenPtr pScreen = pDraw->pScreen;
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
DRI2DrawablePrivPtr pPriv;
WindowPtr pWin;
PixmapPtr pPixmap;
BoxPtr pBox;
BoxRec pixmapBox;
int nBox;
int i;
__DRIDrawableConfigEvent *e;
size_t size;
if (pDraw->type == DRAWABLE_WINDOW) {
pWin = (WindowPtr) pDraw;
pPriv = dixLookupPrivate(&pWin->devPrivates, dri2WindowPrivateKey);
nBox = REGION_NUM_RECTS(&pWin->clipList);
pBox = REGION_RECTS(&pWin->clipList);
pPixmap = pScreen->GetWindowPixmap(pWin);
} else {
pPixmap = (PixmapPtr) pDraw;
pPriv = dixLookupPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey);
pixmapBox.x1 = 0;
pixmapBox.y1 = 0;
pixmapBox.x2 = pDraw->width;
pixmapBox.y2 = pDraw->height;
nBox = 1;
pBox = &pixmapBox;
}
if (!pPriv)
return;
size = sizeof *e + nBox * sizeof e->rects[0];
e = DRI2ScreenAllocEvent(ds, size);
e->event_header = DRI2_EVENT_HEADER(DRI2_EVENT_DRAWABLE_CONFIG, size);
e->drawable = pPriv->dri2Handle;
e->x = pDraw->x - pPixmap->screen_x;
e->y = pDraw->y - pPixmap->screen_y;
e->width = pDraw->width;
e->height = pDraw->height;
e->num_rects = nBox;
for (i = 0; i < nBox; i++) {
e->rects[i].x1 = pBox->x1 - pPixmap->screen_x;
e->rects[i].y1 = pBox->y1 - pPixmap->screen_y;
e->rects[i].x2 = pBox->x2 - pPixmap->screen_x;
e->rects[i].y2 = pBox->y2 - pPixmap->screen_y;
pBox++;
}
}
static void
DRI2PostBufferAttach(DrawablePtr pDraw, Bool force)
{
ScreenPtr pScreen = pDraw->pScreen;
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
DRI2DrawablePrivPtr pPriv;
WindowPtr pWin;
PixmapPtr pPixmap;
__DRIBufferAttachEvent *e;
size_t size;
unsigned int flags;
unsigned int boHandle;
if (pDraw->type == DRAWABLE_WINDOW) {
pWin = (WindowPtr) pDraw;
pPixmap = pScreen->GetWindowPixmap(pWin);
pPriv = dixLookupPrivate(&pWin->devPrivates, dri2WindowPrivateKey);
} else {
pPixmap = (PixmapPtr) pDraw;
pPriv = dixLookupPrivate(&pPixmap->devPrivates, dri2PixmapPrivateKey);
}
if (!pPriv)
return;
boHandle = ds->getPixmapHandle(pPixmap, &flags);
if (boHandle == pPriv->boHandle && !force)
return;
pPriv->boHandle = boHandle;
size = sizeof *e;
e = DRI2ScreenAllocEvent(ds, size);
e->event_header = DRI2_EVENT_HEADER(DRI2_EVENT_BUFFER_ATTACH, size);
e->drawable = pPriv->dri2Handle;
e->buffer.attachment = DRI_DRAWABLE_BUFFER_FRONT_LEFT;
e->buffer.handle = pPriv->boHandle;
e->buffer.pitch = pPixmap->devKind;
e->buffer.cpp = pPixmap->drawable.bitsPerPixel / 8;
e->buffer.flags = flags;
}
static void
DRI2ClipNotify(WindowPtr pWin, int dx, int dy)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
if (!ds->locked) {
ds->beginClipNotify(pScreen);
ds->locked = 1;
}
if (ds->ClipNotify) {
pScreen->ClipNotify = ds->ClipNotify;
pScreen->ClipNotify(pWin, dx, dy);
pScreen->ClipNotify = DRI2ClipNotify;
}
DRI2PostDrawableConfig(&pWin->drawable);
DRI2PostBufferAttach(&pWin->drawable, FALSE);
}
static void
DRI2HandleExposures(WindowPtr pWin)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
if (ds->HandleExposures) {
pScreen->HandleExposures = ds->HandleExposures;
pScreen->HandleExposures(pWin);
pScreen->HandleExposures = DRI2HandleExposures;
}
DRI2ScreenCommitEvents(ds);
if (ds->locked) {
ds->endClipNotify(pScreen);
ds->locked = 0;
}
}
void
DRI2CloseScreen(ScreenPtr pScreen)
{
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
pScreen->ClipNotify = ds->ClipNotify;
pScreen->HandleExposures = ds->HandleExposures;
drmBOUnmap(ds->fd, &ds->sareaBO);
drmBOUnreference(ds->fd, &ds->sareaBO);
xfree(ds);
dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, NULL);
}
Bool
DRI2CreateDrawable(DrawablePtr pDraw,
unsigned int *handle, unsigned int *head)
{
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
WindowPtr pWin;
PixmapPtr pPixmap;
DRI2DrawablePrivPtr pPriv;
DevPrivateKey key;
PrivateRec **devPrivates;
if (pDraw->type == DRAWABLE_WINDOW) {
pWin = (WindowPtr) pDraw;
devPrivates = &pWin->devPrivates;
key = dri2WindowPrivateKey;
} else {
pPixmap = (PixmapPtr) pDraw;
devPrivates = &pPixmap->devPrivates;
key = dri2PixmapPrivateKey;
}
pPriv = dixLookupPrivate(devPrivates, key);
if (pPriv != NULL) {
pPriv->refCount++;
} else {
pPriv = xalloc(sizeof *pPriv);
pPriv->refCount = 1;
pPriv->boHandle = 0;
pPriv->dri2Handle = ds->nextHandle++;
dixSetPrivate(devPrivates, key, pPriv);
}
*handle = pPriv->dri2Handle;
*head = ds->buffer->head;
DRI2PostDrawableConfig(pDraw);
DRI2PostBufferAttach(pDraw, TRUE);
DRI2ScreenCommitEvents(ds);
return TRUE;
}
void
DRI2DestroyDrawable(DrawablePtr pDraw)
{
PixmapPtr pPixmap;
WindowPtr pWin;
DRI2DrawablePrivPtr pPriv;
DevPrivateKey key;
PrivateRec **devPrivates;
if (pDraw->type == DRAWABLE_WINDOW) {
pWin = (WindowPtr) pDraw;
devPrivates = &pWin->devPrivates;
key = dri2WindowPrivateKey;
} else {
pPixmap = (PixmapPtr) pDraw;
devPrivates = &pPixmap->devPrivates;
key = dri2PixmapPrivateKey;
}
pPriv = dixLookupPrivate(devPrivates, key);
if (pPriv == NULL)
return;
pPriv->refCount--;
if (pPriv->refCount == 0) {
dixSetPrivate(devPrivates, key, NULL);
xfree(pPriv);
}
}
void
DRI2ReemitDrawableInfo(DrawablePtr pDraw, unsigned int *head)
{
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
*head = ds->buffer->head;
DRI2PostDrawableConfig(pDraw);
DRI2PostBufferAttach(pDraw, TRUE);
DRI2ScreenCommitEvents(ds);
}
Bool
DRI2Connect(ScreenPtr pScreen, int *fd, const char **driverName,
unsigned int *sareaHandle)
{
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
if (ds == NULL)
return FALSE;
*fd = ds->fd;
*driverName = ds->driverName;
*sareaHandle = ds->sareaBO.handle;
return TRUE;
}
Bool
DRI2AuthConnection(ScreenPtr pScreen, drm_magic_t magic)
{
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
if (ds == NULL || drmAuthMagic(ds->fd, magic))
return FALSE;
return TRUE;
}
unsigned int
DRI2GetPixmapHandle(PixmapPtr pPixmap, unsigned int *flags)
{
DRI2ScreenPtr ds = DRI2GetScreen(pPixmap->drawable.pScreen);
return ds->getPixmapHandle(pPixmap, flags);
}
static void *
DRI2SetupSAREA(ScreenPtr pScreen, size_t driverSareaSize)
{
DRI2ScreenPtr ds = DRI2GetScreen(pScreen);
unsigned long mask;
const size_t event_buffer_size = 32 * 1024;
ds->sareaSize =
sizeof(*ds->buffer) + event_buffer_size +
driverSareaSize +
sizeof (unsigned int);
mask = DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE | DRM_BO_FLAG_MAPPABLE |
DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_SHAREABLE;
if (drmBOCreate(ds->fd, ds->sareaSize, 1, NULL, mask, 0, &ds->sareaBO))
return NULL;
if (drmBOMap(ds->fd, &ds->sareaBO,
DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 0, &ds->sarea)) {
drmBOUnreference(ds->fd, &ds->sareaBO);
return NULL;
}
xf86DrvMsg(pScreen->myNum, X_INFO,
"[DRI2] Allocated %d byte SAREA, BO handle 0x%08x\n",
ds->sareaSize, ds->sareaBO.handle);
memset(ds->sarea, 0, ds->sareaSize);
ds->buffer = ds->sarea;
ds->buffer->block_header =
DRI2_SAREA_BLOCK_HEADER(DRI2_SAREA_BLOCK_EVENT_BUFFER,
sizeof *ds->buffer + event_buffer_size);
ds->buffer->size = event_buffer_size;
return DRI2_SAREA_BLOCK_NEXT(ds->buffer);
}
void *
DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
{
DRI2ScreenPtr ds;
void *p;
ds = xalloc(sizeof *ds);
if (!ds)
return NULL;
ds->fd = info->fd;
ds->driverName = info->driverName;
ds->nextHandle = 1;
ds->getPixmapHandle = info->getPixmapHandle;
ds->beginClipNotify = info->beginClipNotify;
ds->endClipNotify = info->endClipNotify;
ds->ClipNotify = pScreen->ClipNotify;
pScreen->ClipNotify = DRI2ClipNotify;
ds->HandleExposures = pScreen->HandleExposures;
pScreen->HandleExposures = DRI2HandleExposures;
dixSetPrivate(&pScreen->devPrivates, dri2ScreenPrivateKey, ds);
p = DRI2SetupSAREA(pScreen, info->driverSareaSize);
if (p == NULL) {
xfree(ds);
return NULL;
}
xf86DrvMsg(pScreen->myNum, X_INFO, "[DRI2] Setup complete\n");
return p;
}
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, 0, 0,
ABI_CLASS_EXTENSION,
ABI_EXTENSION_VERSION,
MOD_CLASS_NONE,
{ 0, 0, 0, 0 }
};
_X_EXPORT XF86ModuleData dri2ModuleData = { &DRI2VersRec, DRI2Setup, NULL };
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