nouveau: Add notifier support functions

1 files changed, 115 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_sync.c b/src/mesa/drivers/dri/nouveau/nouveau_sync.c
new file mode 100644
index 0000000000..698f778c4b
--- /dev/null
+++ b/src/mesa/drivers/dri/nouveau/nouveau_sync.c
@@ -0,0 +1,115 @@
+#include "vblank.h" /* for DO_USLEEP */
+
+#include "nouveau_context.h"
+#include "nouveau_buffers.h"
+#include "nouveau_object.h"
+#include "nouveau_fifo.h"
+#include "nouveau_reg.h"
+#include "nouveau_msg.h"
+#include "nouveau_sync.h"
+
+nouveau_notifier *
+nouveau_notifier_new(GLcontext *ctx, GLuint handle)
+{
+	nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
+	nouveau_notifier *notifier;
+
+	notifier = CALLOC_STRUCT(nouveau_notifier_t);
+	if (!notifier)
+		return NULL;
+
+	notifier->mem = nouveau_mem_alloc(ctx, NOUVEAU_MEM_FB, 32, 0);
+	if (!notifier->mem) {
+		FREE(notifier);
+		return NULL;
+	}
+
+	if (!nouveauCreateDmaObject(nmesa, handle, notifier->mem->offset,
+						   notifier->mem->size,
+						   0 /* NV_DMA_TARGET_FB */,
+						   0 /* NV_DMA_ACCESS_RW */)) {
+		nouveau_mem_free(ctx, notifier->mem);
+		FREE(notifier);
+		return NULL;
+	}
+
+	notifier->handle = handle;
+	return notifier;
+}
+
+void
+nouveau_notifier_destroy(GLcontext *ctx, nouveau_notifier *notifier)
+{
+	/*XXX: free DMA object.. */
+	nouveau_mem_free(ctx, notifier->mem);
+	FREE(notifier);
+}
+
+void
+nouveau_notifier_reset(nouveau_notifier *notifier)
+{
+	volatile GLuint *n = notifier->mem->map;
+
+	n[NV_NOTIFY_TIME_0      /4] = 0x00000000;
+	n[NV_NOTIFY_TIME_1      /4] = 0x00000000;
+	n[NV_NOTIFY_RETURN_VALUE/4] = 0x00000000;
+	n[NV_NOTIFY_STATE       /4] = (NV_NOTIFY_STATE_STATUS_IN_PROCESS <<
+				       NV_NOTIFY_STATE_STATUS_SHIFT);
+}
+
+GLboolean
+nouveau_notifier_wait_status(nouveau_notifier *notifier, GLuint status,
+							 GLuint timeout)
+{
+	volatile GLuint *n = notifier->mem->map;
+	unsigned int time = 0;
+
+	while (time <= timeout) {
+		if (n[NV_NOTIFY_STATE] & NV_NOTIFY_STATE_ERROR_CODE_MASK) {
+			MESSAGE("Notifier returned error: 0x%04x\n",
+					n[NV_NOTIFY_STATE] &
+					NV_NOTIFY_STATE_ERROR_CODE_MASK);
+			return GL_FALSE;
+		}
+
+		if (((n[NV_NOTIFY_STATE] & NV_NOTIFY_STATE_STATUS_MASK) >>
+				NV_NOTIFY_STATE_STATUS_SHIFT) == status)
+			return GL_TRUE;
+
+		if (timeout) {
+			DO_USLEEP(1);
+			time++;
+		}
+	}
+
+	MESSAGE("Notifier timed out\n");
+	return GL_FALSE;
+}
+
+void
+nouveau_notifier_wait_nop(GLcontext *ctx, nouveau_notifier *notifier,
+					  GLuint subc)
+{
+	nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
+	GLboolean ret;
+
+	nouveau_notifier_reset(notifier);
+
+	BEGIN_RING_SIZE(subc, NV_NOTIFY, 1);
+	OUT_RING       (NV_NOTIFY_STYLE_WRITE_ONLY);
+	BEGIN_RING_SIZE(subc, NV_NOP, 1);
+	OUT_RING       (0);
+
+	ret = nouveau_notifier_wait_status(notifier,
+					   NV_NOTIFY_STATE_STATUS_COMPLETED,
+					   0 /* no timeout */);
+	if (ret) MESSAGE("wait on notifier failed\n");
+}
+
+void nouveauSyncInitFuncs(GLcontext *ctx)
+{
+	nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
+
+	nmesa->syncNotifier = nouveau_notifier_new(ctx, NvSyncNotify);
+}
+