LXR linux/drivers/gpu/drm/nouveau/nvkm/engine/dma/user.c

   1/*
   2 * Copyright 2012 Red Hat Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 * Authors: Ben Skeggs
  23 */
  24#include "user.h"
  25
  26#include <core/client.h>
  27#include <core/gpuobj.h>
  28#include <subdev/fb.h>
  29#include <subdev/instmem.h>
  30
  31#include <nvif/cl0002.h>
  32#include <nvif/unpack.h>
  33
  34static const struct nvkm_object_func nvkm_dmaobj_func;
  35struct nvkm_dmaobj *
  36nvkm_dmaobj_search(struct nvkm_client *client, u64 handle)
  37{
  38        struct nvkm_object *object;
  39
  40        object = nvkm_object_search(client, handle, &nvkm_dmaobj_func);
  41        if (IS_ERR(object))
  42                return (void *)object;
  43
  44        return nvkm_dmaobj(object);
  45}
  46
  47static int
  48nvkm_dmaobj_bind(struct nvkm_object *base, struct nvkm_gpuobj *gpuobj,
  49                 int align, struct nvkm_gpuobj **pgpuobj)
  50{
  51        struct nvkm_dmaobj *dmaobj = nvkm_dmaobj(base);
  52        return dmaobj->func->bind(dmaobj, gpuobj, align, pgpuobj);
  53}
  54
  55static void *
  56nvkm_dmaobj_dtor(struct nvkm_object *base)
  57{
  58        return nvkm_dmaobj(base);
  59}
  60
  61static const struct nvkm_object_func
  62nvkm_dmaobj_func = {
  63        .dtor = nvkm_dmaobj_dtor,
  64        .bind = nvkm_dmaobj_bind,
  65};
  66
  67int
  68nvkm_dmaobj_ctor(const struct nvkm_dmaobj_func *func, struct nvkm_dma *dma,
  69                 const struct nvkm_oclass *oclass, void **pdata, u32 *psize,
  70                 struct nvkm_dmaobj *dmaobj)
  71{
  72        union {
  73                struct nv_dma_v0 v0;
  74        } *args = *pdata;
  75        struct nvkm_device *device = dma->engine.subdev.device;
  76        struct nvkm_client *client = oclass->client;
  77        struct nvkm_object *parent = oclass->parent;
  78        struct nvkm_instmem *instmem = device->imem;
  79        struct nvkm_fb *fb = device->fb;
  80        void *data = *pdata;
  81        u32 size = *psize;
  82        int ret = -ENOSYS;
  83
  84        nvkm_object_ctor(&nvkm_dmaobj_func, oclass, &dmaobj->object);
  85        dmaobj->func = func;
  86        dmaobj->dma = dma;
  87
  88        nvif_ioctl(parent, "create dma size %d\n", *psize);
  89        if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
  90                nvif_ioctl(parent, "create dma vers %d target %d access %d "
  91                                   "start %016llx limit %016llx\n",
  92                           args->v0.version, args->v0.target, args->v0.access,
  93                           args->v0.start, args->v0.limit);
  94                dmaobj->target = args->v0.target;
  95                dmaobj->access = args->v0.access;
  96                dmaobj->start  = args->v0.start;
  97                dmaobj->limit  = args->v0.limit;
  98        } else
  99                return ret;
 100
 101        *pdata = data;
 102        *psize = size;
 103
 104        if (dmaobj->start > dmaobj->limit)
 105                return -EINVAL;
 106
 107        switch (dmaobj->target) {
 108        case NV_DMA_V0_TARGET_VM:
 109                dmaobj->target = NV_MEM_TARGET_VM;
 110                break;
 111        case NV_DMA_V0_TARGET_VRAM:
 112                if (!client->super) {
 113                        if (dmaobj->limit >= fb->ram->size - instmem->reserved)
 114                                return -EACCES;
 115                        if (device->card_type >= NV_50)
 116                                return -EACCES;
 117                }
 118                dmaobj->target = NV_MEM_TARGET_VRAM;
 119                break;
 120        case NV_DMA_V0_TARGET_PCI:
 121                if (!client->super)
 122                        return -EACCES;
 123                dmaobj->target = NV_MEM_TARGET_PCI;
 124                break;
 125        case NV_DMA_V0_TARGET_PCI_US:
 126        case NV_DMA_V0_TARGET_AGP:
 127                if (!client->super)
 128                        return -EACCES;
 129                dmaobj->target = NV_MEM_TARGET_PCI_NOSNOOP;
 130                break;
 131        default:
 132                return -EINVAL;
 133        }
 134
 135        switch (dmaobj->access) {
 136        case NV_DMA_V0_ACCESS_VM:
 137                dmaobj->access = NV_MEM_ACCESS_VM;
 138                break;
 139        case NV_DMA_V0_ACCESS_RD:
 140                dmaobj->access = NV_MEM_ACCESS_RO;
 141                break;
 142        case NV_DMA_V0_ACCESS_WR:
 143                dmaobj->access = NV_MEM_ACCESS_WO;
 144                break;
 145        case NV_DMA_V0_ACCESS_RDWR:
 146                dmaobj->access = NV_MEM_ACCESS_RW;
 147                break;
 148        default:
 149                return -EINVAL;
 150        }
 151
 152        return ret;
 153}
 154