dri3: Add DRI3 extension

Adds DRM compatible fences using futexes.
Uses FD passing to get pixmaps from DRM applications.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>

6 files changed, 250 insertions, 22 deletions

diff --git a/miext/sync/Makefile.am b/miext/sync/Makefile.am
index 9aa1ba5d5..e25ceacb0 100644
--- a/miext/sync/Makefile.am
+++ b/miext/sync/Makefile.am
@@ -5,10 +5,11 @@ AM_CFLAGS = $(DIX_CFLAGS)
 AM_CPPFLAGS = 
 
 if XORG
-sdk_HEADERS = misync.h misyncstr.h
+sdk_HEADERS = misync.h misyncstr.h misyncshm.h
 endif
 
 libsync_la_SOURCES =	\
 	misync.c	\
 	misync.h	\
+	misyncshm.c	\
 	misyncstr.h
diff --git a/miext/sync/misync.c b/miext/sync/misync.c
index f38054754..3d03d1b59 100644
--- a/miext/sync/misync.c
+++ b/miext/sync/misync.c
@@ -29,20 +29,7 @@
 #include "misync.h"
 #include "misyncstr.h"
 
-static DevPrivateKeyRec syncScreenPrivateKeyRec;
-static DevPrivateKey syncScreenPrivateKey = &syncScreenPrivateKeyRec;
-
-#define SYNC_SCREEN_PRIV(pScreen) 				\
-    (SyncScreenPrivPtr) dixLookupPrivate(&pScreen->devPrivates,	\
-					 syncScreenPrivateKey)
-
-typedef struct _syncScreenPriv {
-    /* Wrappable sync-specific screen functions */
-    SyncScreenFuncsRec funcs;
-
-    /* Wrapped screen functions */
-    CloseScreenProcPtr CloseScreen;
-} SyncScreenPrivRec, *SyncScreenPrivPtr;
+DevPrivateKeyRec miSyncScreenPrivateKey;
 
 /* Default implementations of the sync screen functions */
 void
@@ -62,25 +49,25 @@ miSyncScreenDestroyFence(ScreenPtr pScreen, SyncFence * pFence)
 }
 
 /* Default implementations of the per-object functions */
-static void
+void
 miSyncFenceSetTriggered(SyncFence * pFence)
 {
     pFence->triggered = TRUE;
 }
 
-static void
+void
 miSyncFenceReset(SyncFence * pFence)
 {
     pFence->triggered = FALSE;
 }
 
-static Bool
+Bool
 miSyncFenceCheckTriggered(SyncFence * pFence)
 {
     return pFence->triggered;
 }
 
-static void
+void
 miSyncFenceAddTrigger(SyncTrigger * pTrigger)
 {
     (void) pTrigger;
@@ -88,7 +75,7 @@ miSyncFenceAddTrigger(SyncTrigger * pTrigger)
     return;
 }
 
-static void
+void
 miSyncFenceDeleteTrigger(SyncTrigger * pTrigger)
 {
     (void) pTrigger;
@@ -182,8 +169,8 @@ miSyncSetup(ScreenPtr pScreen)
         &miSyncScreenDestroyFence
     };
 
-    if (!dixPrivateKeyRegistered(syncScreenPrivateKey)) {
-        if (!dixRegisterPrivateKey(syncScreenPrivateKey, PRIVATE_SCREEN,
+    if (!dixPrivateKeyRegistered(&miSyncScreenPrivateKey)) {
+        if (!dixRegisterPrivateKey(&miSyncScreenPrivateKey, PRIVATE_SCREEN,
                                    sizeof(SyncScreenPrivRec)))
             return FALSE;
     }
diff --git a/miext/sync/misync.h b/miext/sync/misync.h
index deebb82bc..f63ec2b82 100644
--- a/miext/sync/misync.h
+++ b/miext/sync/misync.h
@@ -76,4 +76,25 @@ extern _X_EXPORT SyncScreenFuncsPtr miSyncGetScreenFuncs(ScreenPtr pScreen);
 extern _X_EXPORT Bool
  miSyncSetup(ScreenPtr pScreen);
 
+Bool
+miSyncFenceCheckTriggered(SyncFence * pFence);
+
+void
+miSyncFenceSetTriggered(SyncFence * pFence);
+
+void
+miSyncFenceReset(SyncFence * pFence);
+
+void
+miSyncFenceAddTrigger(SyncTrigger * pTrigger);
+
+void
+miSyncFenceDeleteTrigger(SyncTrigger * pTrigger);
+
+int
+miSyncInitFenceFromFD(DrawablePtr pDraw, SyncFence *pFence, int fd, BOOL initially_triggered);
+
+int
+miSyncFDFromFence(DrawablePtr pDraw, SyncFence *pFence);
+
 #endif                          /* _MISYNC_H_ */
diff --git a/miext/sync/misyncshm.c b/miext/sync/misyncshm.c
new file mode 100644
index 000000000..ddd15ae49
--- /dev/null
+++ b/miext/sync/misyncshm.c
@@ -0,0 +1,176 @@
+/*
+ * Copyright © 2013 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL 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 PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "scrnintstr.h"
+#include "misync.h"
+#include "misyncstr.h"
+#include "misyncshm.h"
+#include "pixmapstr.h"
+#include <sys/mman.h>
+#include <unistd.h>
+#include <X11/xshmfence.h>
+
+static DevPrivateKeyRec syncShmFencePrivateKey;
+
+typedef struct _SyncShmFencePrivate {
+    int32_t             *fence;
+    int                 fd;
+} SyncShmFencePrivateRec, *SyncShmFencePrivatePtr;
+
+#define SYNC_FENCE_PRIV(pFence) \
+    (SyncShmFencePrivatePtr) dixLookupPrivate(&pFence->devPrivates, &syncShmFencePrivateKey)
+
+static void
+miSyncShmFenceSetTriggered(SyncFence * pFence)
+{
+    SyncShmFencePrivatePtr      pPriv = SYNC_FENCE_PRIV(pFence);
+
+    if (pPriv->fence)
+        xshmfence_trigger(pPriv->fence);
+    miSyncFenceSetTriggered(pFence);
+}
+
+static void
+miSyncShmFenceReset(SyncFence * pFence)
+{
+    SyncShmFencePrivatePtr      pPriv = SYNC_FENCE_PRIV(pFence);
+
+    if (pPriv->fence)
+        xshmfence_reset(pPriv->fence);
+    miSyncFenceReset(pFence);
+}
+
+static Bool
+miSyncShmFenceCheckTriggered(SyncFence * pFence)
+{
+    SyncShmFencePrivatePtr      pPriv = SYNC_FENCE_PRIV(pFence);
+
+    if (pPriv->fence)
+        return xshmfence_query(pPriv->fence);
+    else
+        return miSyncFenceCheckTriggered(pFence);
+}
+
+static void
+miSyncShmFenceAddTrigger(SyncTrigger * pTrigger)
+{
+    miSyncFenceAddTrigger(pTrigger);
+}
+
+static void
+miSyncShmFenceDeleteTrigger(SyncTrigger * pTrigger)
+{
+    miSyncFenceDeleteTrigger(pTrigger);
+}
+
+static const SyncFenceFuncsRec miSyncShmFenceFuncs = {
+    &miSyncShmFenceSetTriggered,
+    &miSyncShmFenceReset,
+    &miSyncShmFenceCheckTriggered,
+    &miSyncShmFenceAddTrigger,
+    &miSyncShmFenceDeleteTrigger
+};
+
+static void
+miSyncShmScreenCreateFence(ScreenPtr pScreen, SyncFence * pFence,
+                        Bool initially_triggered)
+{
+    SyncShmFencePrivatePtr      pPriv = SYNC_FENCE_PRIV(pFence);
+
+    pPriv->fence = NULL;
+    miSyncScreenCreateFence(pScreen, pFence, initially_triggered);
+    pFence->funcs = miSyncShmFenceFuncs;
+}
+
+static void
+miSyncShmScreenDestroyFence(ScreenPtr pScreen, SyncFence * pFence)
+{
+    SyncShmFencePrivatePtr      pPriv = SYNC_FENCE_PRIV(pFence);
+
+    if (pPriv->fence) {
+        xshmfence_trigger(pPriv->fence);
+        xshmfence_unmap_shm(pPriv->fence);
+        close(pPriv->fd);
+    }
+    miSyncScreenDestroyFence(pScreen, pFence);
+}
+
+int
+miSyncInitFenceFromFD(DrawablePtr pDraw, SyncFence *pFence, int fd, BOOL initially_triggered)
+
+{
+    SyncShmFencePrivatePtr      pPriv = SYNC_FENCE_PRIV(pFence);
+
+    miSyncInitFence(pDraw->pScreen, pFence, initially_triggered);
+
+    pPriv->fence = xshmfence_map_shm(fd);
+    if (pPriv->fence) {
+        pPriv->fd = fd;
+        return Success;
+    }
+    else
+        close(fd);
+    return BadValue;
+}
+
+int
+miSyncFDFromFence(DrawablePtr pDraw, SyncFence *pFence)
+{
+    SyncShmFencePrivatePtr      pPriv = SYNC_FENCE_PRIV(pFence);
+
+    if (!pPriv->fence) {
+        pPriv->fd = xshmfence_alloc_shm();
+        if (pPriv->fd < 0)
+            return -1;
+        pPriv->fence = xshmfence_map_shm(pPriv->fd);
+        if (!pPriv->fence) {
+            close (pPriv->fd);
+            return -1;
+        }
+    }
+    return pPriv->fd;
+}
+
+_X_EXPORT Bool miSyncShmScreenInit(ScreenPtr pScreen)
+{
+    SyncScreenFuncsPtr  funcs;
+
+    if (!miSyncSetup(pScreen))
+        return FALSE;
+
+    if (!dixPrivateKeyRegistered(&syncShmFencePrivateKey)) {
+        if (!dixRegisterPrivateKey(&syncShmFencePrivateKey, PRIVATE_SYNC_FENCE,
+                                   sizeof(SyncShmFencePrivateRec)))
+            return FALSE;
+    }
+
+    funcs = miSyncGetScreenFuncs(pScreen);
+
+    funcs->CreateFence = miSyncShmScreenCreateFence;
+    funcs->DestroyFence = miSyncShmScreenDestroyFence;
+    return TRUE;
+}
+
diff --git a/miext/sync/misyncshm.h b/miext/sync/misyncshm.h
new file mode 100644
index 000000000..4edbb50c3
--- /dev/null
+++ b/miext/sync/misyncshm.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright © 2013 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL 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 PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#ifndef _MISYNCSHM_H_
+#define _MISYNCSYM_H_
+
+extern _X_EXPORT Bool miSyncShmScreenInit(ScreenPtr pScreen);
+
+#endif /* _MISYNCSHM_H_ */
diff --git a/miext/sync/misyncstr.h b/miext/sync/misyncstr.h
index e19256fee..b5bf6fd91 100644
--- a/miext/sync/misyncstr.h
+++ b/miext/sync/misyncstr.h
@@ -29,6 +29,7 @@
 #define _MISYNCSTR_H_
 
 #include "dix.h"
+#include "scrnintstr.h"
 #include <X11/extensions/syncconst.h>
 
 #define CARD64 XSyncValue       /* XXX temporary! need real 64 bit values for Alpha */
@@ -79,4 +80,18 @@ typedef struct _SyncTriggerList {
     struct _SyncTriggerList *next;
 } SyncTriggerList;
 
+extern DevPrivateKeyRec miSyncScreenPrivateKey;
+
+#define SYNC_SCREEN_PRIV(pScreen) 				\
+    (SyncScreenPrivPtr) dixLookupPrivate(&pScreen->devPrivates,	\
+					 &miSyncScreenPrivateKey)
+
+typedef struct _syncScreenPriv {
+    /* Wrappable sync-specific screen functions */
+    SyncScreenFuncsRec funcs;
+
+    /* Wrapped screen functions */
+    CloseScreenProcPtr CloseScreen;
+} SyncScreenPrivRec, *SyncScreenPrivPtr;
+
 #endif                          /* _MISYNCSTR_H_ */