linux/drivers/gpu/drm/nouveau/nvkm/core/gpuobj.c

/*
 * 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)
{ … }

static void
nvkm_gpuobj_wr32_fast(struct nvkm_gpuobj *gpuobj, u32 offset, u32 data)
{ … }

/* 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)
{ … }

static u32
nvkm_gpuobj_heap_rd32(struct nvkm_gpuobj *gpuobj, u32 offset)
{ … }

static void
nvkm_gpuobj_heap_wr32(struct nvkm_gpuobj *gpuobj, u32 offset, u32 data)
{ … }

static const struct nvkm_gpuobj_func nvkm_gpuobj_heap;
static void
nvkm_gpuobj_heap_release(struct nvkm_gpuobj *gpuobj)
{ … }

static const struct nvkm_gpuobj_func
nvkm_gpuobj_heap_fast = …;

static const struct nvkm_gpuobj_func
nvkm_gpuobj_heap_slow = …;

static void *
nvkm_gpuobj_heap_acquire(struct nvkm_gpuobj *gpuobj)
{ … }

static const struct nvkm_gpuobj_func
nvkm_gpuobj_heap = …;

/* 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)
{ … }

static u32
nvkm_gpuobj_rd32(struct nvkm_gpuobj *gpuobj, u32 offset)
{ … }

static void
nvkm_gpuobj_wr32(struct nvkm_gpuobj *gpuobj, u32 offset, u32 data)
{ … }

static const struct nvkm_gpuobj_func nvkm_gpuobj_func;
static void
nvkm_gpuobj_release(struct nvkm_gpuobj *gpuobj)
{ … }

static const struct nvkm_gpuobj_func
nvkm_gpuobj_fast = …;

static const struct nvkm_gpuobj_func
nvkm_gpuobj_slow = …;

static void *
nvkm_gpuobj_acquire(struct nvkm_gpuobj *gpuobj)
{ … }

static const struct nvkm_gpuobj_func
nvkm_gpuobj_func = …;

static int
nvkm_gpuobj_ctor(struct nvkm_device *device, u32 size, int align, bool zero,
		 struct nvkm_gpuobj *parent, struct nvkm_gpuobj *gpuobj)
{ … }

void
nvkm_gpuobj_del(struct nvkm_gpuobj **pgpuobj)
{ … }

int
nvkm_gpuobj_new(struct nvkm_device *device, u32 size, int align, bool zero,
		struct nvkm_gpuobj *parent, struct nvkm_gpuobj **pgpuobj)
{ … }

/* 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)
{ … }

void
nvkm_gpuobj_memcpy_to(struct nvkm_gpuobj *dst, u32 dstoffset, void *src,
		      u32 length)
{ … }

void
nvkm_gpuobj_memcpy_from(void *dst, struct nvkm_gpuobj *src, u32 srcoffset,
			u32 length)
{ … }