1 files changed, 219 insertions, 0 deletions
diff --git a/src/gallium/winsys/drm/nouveau/nouveau_dma.c b/src/gallium/winsys/drm/nouveau/nouveau_dma.c
new file mode 100644
index 00000000000..f8a8ba04f6d
--- /dev/null
+++ b/src/gallium/winsys/drm/nouveau/nouveau_dma.c
@@ -0,0 +1,219 @@
+/*
+ * Copyright 2007 Nouveau Project
+ *
+ * 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS 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 <stdint.h>
+#include <assert.h>
+#include <errno.h>
+
+#include "nouveau_drmif.h"
+#include "nouveau_dma.h"
+#include "nouveau_local.h"
+
+static inline uint32_t
+READ_GET(struct nouveau_channel_priv *nvchan)
+{
+	return *nvchan->get;
+}
+
+static inline void
+WRITE_PUT(struct nouveau_channel_priv *nvchan, uint32_t val)
+{
+	uint32_t put = ((val << 2) + nvchan->dma->base);
+	volatile int dum;
+
+	NOUVEAU_DMA_BARRIER;
+	dum = READ_GET(nvchan);
+
+	*nvchan->put = put;
+	nvchan->dma->put = val;
+#ifdef NOUVEAU_DMA_TRACE
+	NOUVEAU_MSG("WRITE_PUT %d/0x%08x\n", nvchan->drm.channel, put);
+#endif
+
+	NOUVEAU_DMA_BARRIER;
+}
+
+static inline int
+LOCAL_GET(struct nouveau_dma_priv *dma, uint32_t *val)
+{
+	uint32_t get = *val;
+
+	if (get >= dma->base && get <= (dma->base + (dma->max << 2))) {
+		*val = (get - dma->base) >> 2;
+		return 1;
+	}
+
+	return 0;
+}
+
+void
+nouveau_dma_channel_init(struct nouveau_channel *chan)
+{
+	struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
+	int i;
+
+	nvchan->dma = &nvchan->dma_master;
+	nvchan->dma->base = nvchan->drm.put_base;
+	nvchan->dma->cur  = nvchan->dma->put = 0;
+	nvchan->dma->max  = (nvchan->drm.cmdbuf_size >> 2) - 2;
+	nvchan->dma->free = nvchan->dma->max - nvchan->dma->cur;
+
+	RING_SPACE_CH(chan, RING_SKIPS);
+	for (i = 0; i < RING_SKIPS; i++)
+		OUT_RING_CH(chan, 0);
+}
+
+#define CHECK_TIMEOUT() do {                                                   \
+	if ((NOUVEAU_TIME_MSEC() - t_start) > NOUVEAU_DMA_TIMEOUT)             \
+		return - EBUSY;                                                \
+} while(0)
+
+int
+nouveau_dma_wait(struct nouveau_channel *chan, int size)
+{
+	struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
+	struct nouveau_dma_priv *dma = nvchan->dma;
+	uint32_t get, t_start;
+
+	FIRE_RING_CH(chan);
+
+	t_start = NOUVEAU_TIME_MSEC();
+	while (dma->free < size) {
+		CHECK_TIMEOUT();
+
+		get = READ_GET(nvchan);
+		if (!LOCAL_GET(dma, &get))
+			continue;
+
+		if (dma->put >= get) {
+			dma->free = dma->max - dma->cur;
+
+			if (dma->free < size) {
+#ifdef NOUVEAU_DMA_DEBUG
+				dma->push_free = 1;
+#endif
+				OUT_RING_CH(chan, 0x20000000 | dma->base);
+				if (get <= RING_SKIPS) {
+					/*corner case - will be idle*/
+					if (dma->put <= RING_SKIPS)
+						WRITE_PUT(nvchan,
+							  RING_SKIPS + 1);
+
+					do {
+						CHECK_TIMEOUT();
+						get = READ_GET(nvchan);
+						if (!LOCAL_GET(dma, &get))
+							get = 0;
+					} while (get <= RING_SKIPS);
+				}
+
+				WRITE_PUT(nvchan, RING_SKIPS);
+				dma->cur  = dma->put = RING_SKIPS;
+				dma->free = get - (RING_SKIPS + 1);
+			}
+		} else {
+			dma->free = get - dma->cur - 1;
+		}
+	}
+
+	return 0;
+}
+
+#ifdef NOUVEAU_DMA_DUMP_POSTRELOC_PUSHBUF
+static void
+nouveau_dma_parse_pushbuf(struct nouveau_channel *chan, int get, int put)
+{
+	struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
+	unsigned mthd_count = 0;
+	
+	while (get != put) {
+		uint32_t gpuget = (get << 2) + nvchan->drm.put_base;
+		uint32_t data;
+
+		if (get < 0 || get >= nvchan->drm.cmdbuf_size) {
+			NOUVEAU_ERR("DMA_PT 0x%08x\n", gpuget);
+			assert(0);
+		}
+		data = nvchan->pushbuf[get++];
+
+		if (mthd_count) {
+			NOUVEAU_MSG("0x%08x 0x%08x\n", gpuget, data);
+			mthd_count--;
+			continue;
+		}
+
+		switch (data & 0x60000000) {
+		case 0x00000000:
+			mthd_count = (data >> 18) & 0x7ff;
+			NOUVEAU_MSG("0x%08x 0x%08x MTHD "
+				    "Sc %d Mthd 0x%04x Size %d\n",
+				    gpuget, data, (data>>13) & 7, data & 0x1ffc,
+				    mthd_count);
+			break;
+		case 0x20000000:
+			get = (data & 0x1ffffffc) >> 2;
+			NOUVEAU_MSG("0x%08x 0x%08x JUMP 0x%08x\n",
+				    gpuget, data, data & 0x1ffffffc);
+			continue;
+		case 0x40000000:
+			mthd_count = (data >> 18) & 0x7ff;
+			NOUVEAU_MSG("0x%08x 0x%08x NINC "
+				    "Sc %d Mthd 0x%04x Size %d\n",
+				    gpuget, data, (data>>13) & 7, data & 0x1ffc,
+				    mthd_count);
+			break;
+		case 0x60000000:
+			/* DMA_OPCODE_CALL apparently, doesn't seem to work on
+			 * my NV40 at least..
+			 */
+			/* fall-through */
+		default:
+			NOUVEAU_MSG("DMA_PUSHER 0x%08x 0x%08x\n",
+				    gpuget, data);
+			assert(0);
+		}
+	}
+}
+#endif
+
+void
+nouveau_dma_kickoff(struct nouveau_channel *chan)
+{
+	struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
+	struct nouveau_dma_priv *dma = nvchan->dma;
+
+	if (dma->cur == dma->put)
+		return;
+
+#ifdef NOUVEAU_DMA_DEBUG
+	if (dma->push_free) {
+		NOUVEAU_ERR("Packet incomplete: %d left\n", dma->push_free);
+		return;
+	}
+#endif
+
+#ifdef NOUVEAU_DMA_DUMP_POSTRELOC_PUSHBUF
+	nouveau_dma_parse_pushbuf(chan, dma->put, dma->cur);
+#endif
+
+	WRITE_PUT(nvchan, dma->cur);
+}