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Diffstat (limited to 'src/gallium/winsys/dri/nouveau/nouveau_dma.c')
-rw-r--r--src/gallium/winsys/dri/nouveau/nouveau_dma.c219
1 files changed, 219 insertions, 0 deletions
diff --git a/src/gallium/winsys/dri/nouveau/nouveau_dma.c b/src/gallium/winsys/dri/nouveau/nouveau_dma.c
new file mode 100644
index 0000000000..f8a8ba04f6
--- /dev/null
+++ b/src/gallium/winsys/dri/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);
+}