1 files changed, 278 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/core/gpuobj.c b/drivers/gpu/drm/nouveau/nvkm/core/gpuobj.c
new file mode 100644
index 000000000..d6de2b3ed
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/core/gpuobj.c
@@ -0,0 +1,278 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs
+ */
+#include <core/gpuobj.h>
+#include <core/engine.h>
+
+#include <subdev/instmem.h>
+#include <subdev/bar.h>
+#include <subdev/mmu.h>
+
+/* fast-path, where backend is able to provide direct pointer to memory */
+static u32
+nvkm_gpuobj_rd32_fast(struct nvkm_gpuobj *gpuobj, u32 offset)
+{
+	return ioread32_native(gpuobj->map + offset);
+}
+
+static void
+nvkm_gpuobj_wr32_fast(struct nvkm_gpuobj *gpuobj, u32 offset, u32 data)
+{
+	iowrite32_native(data, gpuobj->map + offset);
+}
+
+/* accessor functions for gpuobjs allocated directly from instmem */
+static int
+nvkm_gpuobj_heap_map(struct nvkm_gpuobj *gpuobj, u64 offset,
+		     struct nvkm_vmm *vmm, struct nvkm_vma *vma,
+		     void *argv, u32 argc)
+{
+	return nvkm_memory_map(gpuobj->memory, offset, vmm, vma, argv, argc);
+}
+
+static u32
+nvkm_gpuobj_heap_rd32(struct nvkm_gpuobj *gpuobj, u32 offset)
+{
+	return nvkm_ro32(gpuobj->memory, offset);
+}
+
+static void
+nvkm_gpuobj_heap_wr32(struct nvkm_gpuobj *gpuobj, u32 offset, u32 data)
+{
+	nvkm_wo32(gpuobj->memory, offset, data);
+}
+
+static const struct nvkm_gpuobj_func nvkm_gpuobj_heap;
+static void
+nvkm_gpuobj_heap_release(struct nvkm_gpuobj *gpuobj)
+{
+	gpuobj->func = &nvkm_gpuobj_heap;
+	nvkm_done(gpuobj->memory);
+}
+
+static const struct nvkm_gpuobj_func
+nvkm_gpuobj_heap_fast = {
+	.release = nvkm_gpuobj_heap_release,
+	.rd32 = nvkm_gpuobj_rd32_fast,
+	.wr32 = nvkm_gpuobj_wr32_fast,
+	.map = nvkm_gpuobj_heap_map,
+};
+
+static const struct nvkm_gpuobj_func
+nvkm_gpuobj_heap_slow = {
+	.release = nvkm_gpuobj_heap_release,
+	.rd32 = nvkm_gpuobj_heap_rd32,
+	.wr32 = nvkm_gpuobj_heap_wr32,
+	.map = nvkm_gpuobj_heap_map,
+};
+
+static void *
+nvkm_gpuobj_heap_acquire(struct nvkm_gpuobj *gpuobj)
+{
+	gpuobj->map = nvkm_kmap(gpuobj->memory);
+	if (likely(gpuobj->map))
+		gpuobj->func = &nvkm_gpuobj_heap_fast;
+	else
+		gpuobj->func = &nvkm_gpuobj_heap_slow;
+	return gpuobj->map;
+}
+
+static const struct nvkm_gpuobj_func
+nvkm_gpuobj_heap = {
+	.acquire = nvkm_gpuobj_heap_acquire,
+	.map = nvkm_gpuobj_heap_map,
+};
+
+/* accessor functions for gpuobjs sub-allocated from a parent gpuobj */
+static int
+nvkm_gpuobj_map(struct nvkm_gpuobj *gpuobj, u64 offset,
+		struct nvkm_vmm *vmm, struct nvkm_vma *vma,
+		void *argv, u32 argc)
+{
+	return nvkm_memory_map(gpuobj->parent, gpuobj->node->offset + offset,
+			       vmm, vma, argv, argc);
+}
+
+static u32
+nvkm_gpuobj_rd32(struct nvkm_gpuobj *gpuobj, u32 offset)
+{
+	return nvkm_ro32(gpuobj->parent, gpuobj->node->offset + offset);
+}
+
+static void
+nvkm_gpuobj_wr32(struct nvkm_gpuobj *gpuobj, u32 offset, u32 data)
+{
+	nvkm_wo32(gpuobj->parent, gpuobj->node->offset + offset, data);
+}
+
+static const struct nvkm_gpuobj_func nvkm_gpuobj_func;
+static void
+nvkm_gpuobj_release(struct nvkm_gpuobj *gpuobj)
+{
+	gpuobj->func = &nvkm_gpuobj_func;
+	nvkm_done(gpuobj->parent);
+}
+
+static const struct nvkm_gpuobj_func
+nvkm_gpuobj_fast = {
+	.release = nvkm_gpuobj_release,
+	.rd32 = nvkm_gpuobj_rd32_fast,
+	.wr32 = nvkm_gpuobj_wr32_fast,
+	.map = nvkm_gpuobj_map,
+};
+
+static const struct nvkm_gpuobj_func
+nvkm_gpuobj_slow = {
+	.release = nvkm_gpuobj_release,
+	.rd32 = nvkm_gpuobj_rd32,
+	.wr32 = nvkm_gpuobj_wr32,
+	.map = nvkm_gpuobj_map,
+};
+
+static void *
+nvkm_gpuobj_acquire(struct nvkm_gpuobj *gpuobj)
+{
+	gpuobj->map = nvkm_kmap(gpuobj->parent);
+	if (likely(gpuobj->map)) {
+		gpuobj->map  = (u8 *)gpuobj->map + gpuobj->node->offset;
+		gpuobj->func = &nvkm_gpuobj_fast;
+	} else {
+		gpuobj->func = &nvkm_gpuobj_slow;
+	}
+	return gpuobj->map;
+}
+
+static const struct nvkm_gpuobj_func
+nvkm_gpuobj_func = {
+	.acquire = nvkm_gpuobj_acquire,
+	.map = nvkm_gpuobj_map,
+};
+
+static int
+nvkm_gpuobj_ctor(struct nvkm_device *device, u32 size, int align, bool zero,
+		 struct nvkm_gpuobj *parent, struct nvkm_gpuobj *gpuobj)
+{
+	u32 offset;
+	int ret;
+
+	if (parent) {
+		if (align >= 0) {
+			ret = nvkm_mm_head(&parent->heap, 0, 1, size, size,
+					   max(align, 1), &gpuobj->node);
+		} else {
+			ret = nvkm_mm_tail(&parent->heap, 0, 1, size, size,
+					   -align, &gpuobj->node);
+		}
+		if (ret)
+			return ret;
+
+		gpuobj->parent = parent;
+		gpuobj->func = &nvkm_gpuobj_func;
+		gpuobj->addr = parent->addr + gpuobj->node->offset;
+		gpuobj->size = gpuobj->node->length;
+
+		if (zero) {
+			nvkm_kmap(gpuobj);
+			for (offset = 0; offset < gpuobj->size; offset += 4)
+				nvkm_wo32(gpuobj, offset, 0x00000000);
+			nvkm_done(gpuobj);
+		}
+	} else {
+		ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, size,
+				      abs(align), zero, &gpuobj->memory);
+		if (ret)
+			return ret;
+
+		gpuobj->func = &nvkm_gpuobj_heap;
+		gpuobj->addr = nvkm_memory_addr(gpuobj->memory);
+		gpuobj->size = nvkm_memory_size(gpuobj->memory);
+	}
+
+	return nvkm_mm_init(&gpuobj->heap, 0, 0, gpuobj->size, 1);
+}
+
+void
+nvkm_gpuobj_del(struct nvkm_gpuobj **pgpuobj)
+{
+	struct nvkm_gpuobj *gpuobj = *pgpuobj;
+	if (gpuobj) {
+		if (gpuobj->parent)
+			nvkm_mm_free(&gpuobj->parent->heap, &gpuobj->node);
+		nvkm_mm_fini(&gpuobj->heap);
+		nvkm_memory_unref(&gpuobj->memory);
+		kfree(*pgpuobj);
+		*pgpuobj = NULL;
+	}
+}
+
+int
+nvkm_gpuobj_new(struct nvkm_device *device, u32 size, int align, bool zero,
+		struct nvkm_gpuobj *parent, struct nvkm_gpuobj **pgpuobj)
+{
+	struct nvkm_gpuobj *gpuobj;
+	int ret;
+
+	if (!(gpuobj = *pgpuobj = kzalloc(sizeof(*gpuobj), GFP_KERNEL)))
+		return -ENOMEM;
+
+	ret = nvkm_gpuobj_ctor(device, size, align, zero, parent, gpuobj);
+	if (ret)
+		nvkm_gpuobj_del(pgpuobj);
+	return ret;
+}
+
+/* the below is basically only here to support sharing the paged dma object
+ * for PCI(E)GART on <=nv4x chipsets, and should *not* be expected to work
+ * anywhere else.
+ */
+
+int
+nvkm_gpuobj_wrap(struct nvkm_memory *memory, struct nvkm_gpuobj **pgpuobj)
+{
+	if (!(*pgpuobj = kzalloc(sizeof(**pgpuobj), GFP_KERNEL)))
+		return -ENOMEM;
+
+	(*pgpuobj)->addr = nvkm_memory_addr(memory);
+	(*pgpuobj)->size = nvkm_memory_size(memory);
+	return 0;
+}
+
+void
+nvkm_gpuobj_memcpy_to(struct nvkm_gpuobj *dst, u32 dstoffset, void *src,
+		      u32 length)
+{
+	int i;
+
+	for (i = 0; i < length; i += 4)
+		nvkm_wo32(dst, dstoffset + i, *(u32 *)(src + i));
+}
+
+void
+nvkm_gpuobj_memcpy_from(void *dst, struct nvkm_gpuobj *src, u32 srcoffset,
+			u32 length)
+{
+	int i;
+
+	for (i = 0; i < length; i += 4)
+		((u32 *)src)[i / 4] = nvkm_ro32(src, srcoffset + i);
+}