1 files changed, 132 insertions, 0 deletions
diff --git a/nouveau/nouveau_reloc.c b/nouveau/nouveau_reloc.c
new file mode 100644
index 00000000..301482b0
--- /dev/null
+++ b/nouveau/nouveau_reloc.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2010 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 <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "nouveau_private.h"
+
+static uint32_t
+nouveau_reloc_calc(struct drm_nouveau_gem_pushbuf_bo *pbbo,
+		   struct drm_nouveau_gem_pushbuf_reloc *r)
+{
+	uint32_t push = 0;
+
+	if (r->flags & NOUVEAU_GEM_RELOC_LOW)
+		push = (pbbo->presumed.offset + r->data);
+	else
+	if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
+		push = (pbbo->presumed.offset + r->data) >> 32;
+	else
+		push = r->data;
+
+	if (r->flags & NOUVEAU_GEM_RELOC_OR) {
+		if (pbbo->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM)
+			push |= r->vor;
+		else
+			push |= r->tor;
+	}
+
+	return push;
+}
+
+int
+nouveau_reloc_emit(struct nouveau_channel *chan, struct nouveau_bo *reloc_bo,
+		   uint32_t reloc_offset, uint32_t *reloc_ptr,
+		   struct nouveau_bo *bo, uint32_t data, uint32_t data2,
+		   uint32_t flags, uint32_t vor, uint32_t tor)
+{
+	struct nouveau_pushbuf_priv *nvpb = &nouveau_channel(chan)->pb;
+	struct nouveau_bo_priv *nvbo = nouveau_bo(bo);
+	struct drm_nouveau_gem_pushbuf_reloc *r;
+	struct drm_nouveau_gem_pushbuf_bo *pbbo, *rpbbo;
+	uint32_t domains = 0;
+
+	if (nvpb->nr_relocs >= NOUVEAU_GEM_MAX_RELOCS) {
+		fprintf(stderr, "too many relocs!!\n");
+		return -ENOMEM;
+	}
+
+	if (nvbo->user && (flags & NOUVEAU_BO_WR)) {
+		fprintf(stderr, "write to user buffer!!\n");
+		return -EINVAL;
+	}
+
+	rpbbo = nouveau_bo_emit_buffer(chan, reloc_bo);
+	if (!rpbbo)
+		return -ENOMEM;
+	nouveau_bo(reloc_bo)->pending_refcnt++;
+
+	pbbo = nouveau_bo_emit_buffer(chan, bo);
+	if (!pbbo) {
+		fprintf(stderr, "buffer emit fail :(\n");
+		return -ENOMEM;
+	}
+	nouveau_bo(bo)->pending_refcnt++;
+
+	if (flags & NOUVEAU_BO_VRAM)
+		domains |= NOUVEAU_GEM_DOMAIN_VRAM;
+	if (flags & NOUVEAU_BO_GART)
+		domains |= NOUVEAU_GEM_DOMAIN_GART;
+
+	if (!(pbbo->valid_domains & domains)) {
+		fprintf(stderr, "no valid domains remain!\n");
+		return -EINVAL;
+	}
+	pbbo->valid_domains &= domains;
+
+	assert(flags & NOUVEAU_BO_RDWR);
+	if (flags & NOUVEAU_BO_RD) {
+		pbbo->read_domains |= domains;
+	}
+	if (flags & NOUVEAU_BO_WR) {
+		pbbo->write_domains |= domains;
+		nvbo->write_marker = 1;
+	}
+
+	r = nvpb->relocs + nvpb->nr_relocs++;
+	r->reloc_bo_index = rpbbo - nvpb->buffers;
+	r->reloc_bo_offset = reloc_offset;
+	r->bo_index = pbbo - nvpb->buffers;
+	r->flags = 0;
+	if (flags & NOUVEAU_BO_LOW)
+		r->flags |= NOUVEAU_GEM_RELOC_LOW;
+	if (flags & NOUVEAU_BO_HIGH)
+		r->flags |= NOUVEAU_GEM_RELOC_HIGH;
+	if (flags & NOUVEAU_BO_OR)
+		r->flags |= NOUVEAU_GEM_RELOC_OR;
+	r->data = data;
+	r->vor = vor;
+	r->tor = tor;
+
+	if (reloc_ptr) {
+		if (flags & NOUVEAU_BO_DUMMY)
+			*reloc_ptr = 0;
+		else
+			*reloc_ptr = nouveau_reloc_calc(pbbo, r);
+	}
+
+	return 0;
+}
+