1 files changed, 152 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/nouveau/nouveau_fifo.c b/src/mesa/drivers/dri/nouveau/nouveau_fifo.c
new file mode 100644
index 00000000000..5eb53aa46cb
--- /dev/null
+++ b/src/mesa/drivers/dri/nouveau/nouveau_fifo.c
@@ -0,0 +1,152 @@
+/**************************************************************************
+
+Copyright 2006 Stephane Marchesin
+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
+ERIC ANHOLT OR SILICON INTEGRATED SYSTEMS CORP 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.
+
+**************************************************************************/
+
+
+#include "vblank.h"
+#include <errno.h>
+#include "mtypes.h"
+#include "macros.h"
+#include "dd.h"
+#include "swrast/swrast.h"
+#include "nouveau_context.h"
+#include "nouveau_msg.h"
+#include "nouveau_fifo.h"
+#include "nouveau_lock.h"
+#include "nouveau_object.h"
+#include "nouveau_sync.h"
+
+#ifdef NOUVEAU_RING_DEBUG
+int nouveau_fifo_remaining=0;
+#endif
+
+
+#define RING_SKIPS 8
+
+void WAIT_RING(nouveauContextPtr nmesa,uint32_t size)
+{
+#ifdef NOUVEAU_RING_DEBUG
+	return;
+#endif
+	uint32_t fifo_get;
+	while(nmesa->fifo.free < size+1) {
+		fifo_get = NV_FIFO_READ_GET();
+
+		if(nmesa->fifo.put >= fifo_get) {
+			nmesa->fifo.free = nmesa->fifo.max - nmesa->fifo.current;
+			if(nmesa->fifo.free < size+1) {
+				OUT_RING(NV03_FIFO_CMD_JUMP | nmesa->fifo.put_base);
+				if(fifo_get <= RING_SKIPS) {
+					if(nmesa->fifo.put <= RING_SKIPS) /* corner case - will be idle */
+						NV_FIFO_WRITE_PUT(RING_SKIPS + 1);
+					do { fifo_get = NV_FIFO_READ_GET(); }
+					while(fifo_get <= RING_SKIPS);
+				}
+				NV_FIFO_WRITE_PUT(RING_SKIPS);
+				nmesa->fifo.current = nmesa->fifo.put = RING_SKIPS;
+				nmesa->fifo.free = fifo_get - (RING_SKIPS + 1);
+			}
+		} else 
+			nmesa->fifo.free = fifo_get - nmesa->fifo.current - 1;
+	}
+}
+
+/* 
+ * Wait for the channel to be idle 
+ */
+void nouveauWaitForIdleLocked(nouveauContextPtr nmesa)
+{
+	/* Wait for FIFO idle */
+	FIRE_RING();
+	while(RING_AHEAD()>0);
+
+	/* Wait on notifier to indicate all commands in the channel have
+	 * been completed.
+	 */
+	nouveau_notifier_wait_nop(nmesa->glCtx, nmesa->syncNotifier, NvSub3D);
+}
+
+void nouveauWaitForIdle(nouveauContextPtr nmesa)
+{
+	LOCK_HARDWARE(nmesa);
+	nouveauWaitForIdleLocked(nmesa);
+	UNLOCK_HARDWARE(nmesa);
+}
+
+// here we call the fifo initialization ioctl and fill in stuff accordingly
+GLboolean nouveauFifoInit(nouveauContextPtr nmesa)
+{
+	struct drm_nouveau_fifo_alloc fifo_init;
+	int i, ret;
+
+#ifdef NOUVEAU_RING_DEBUG
+	return GL_TRUE;
+#endif
+
+	fifo_init.fb_ctxdma_handle = NvDmaFB;
+	fifo_init.tt_ctxdma_handle = NvDmaTT;
+	ret=drmCommandWriteRead(nmesa->driFd, DRM_NOUVEAU_FIFO_ALLOC, &fifo_init, sizeof(fifo_init));
+	if (ret) {
+		FATAL("Fifo initialization ioctl failed (returned %d)\n",ret);
+		return GL_FALSE;
+	}
+
+	ret = drmMap(nmesa->driFd, fifo_init.cmdbuf, fifo_init.cmdbuf_size, &nmesa->fifo.buffer);
+	if (ret) {
+		FATAL("Unable to map the fifo (returned %d)\n",ret);
+		return GL_FALSE;
+	}
+
+	ret = drmMap(nmesa->driFd, fifo_init.ctrl, fifo_init.ctrl_size, &nmesa->fifo.mmio);
+	if (ret) {
+		FATAL("Unable to map the control regs (returned %d)\n",ret);
+		return GL_FALSE;
+	}
+
+	ret = drmMap(nmesa->driFd, fifo_init.notifier,
+				   fifo_init.notifier_size,
+				   &nmesa->notifier_block);
+	if (ret) {
+		FATAL("Unable to map the notifier block (returned %d)\n",ret);
+		return GL_FALSE;
+	}
+
+	/* Setup our initial FIFO tracking params */
+	nmesa->fifo.channel  = fifo_init.channel;
+	nmesa->fifo.put_base = fifo_init.put_base;
+	nmesa->fifo.current  = 0;
+	nmesa->fifo.put      = 0;
+	nmesa->fifo.max      = (fifo_init.cmdbuf_size >> 2) - 1;
+	nmesa->fifo.free     = nmesa->fifo.max - nmesa->fifo.current;
+
+	for (i=0; i<RING_SKIPS; i++)
+	   OUT_RING(0);
+	nmesa->fifo.free -= RING_SKIPS;
+
+	MESSAGE("Fifo init ok. Using context %d\n", fifo_init.channel);
+	return GL_TRUE;
+}
+
+