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
  34 static const struct nvkm_object_func nvkm_dmaobj_func;
  35 struct nvkm_dmaobj *
  36 nvkm_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
  47 static int
  48 nvkm_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
  55 static void *
  56 nvkm_dmaobj_dtor(struct nvkm_object *base)
  57 {
  58         return nvkm_dmaobj(base);
  59 }
  60
  61 static const struct nvkm_object_func
  62 nvkm_dmaobj_func = {
  63         .dtor = nvkm_dmaobj_dtor,
  64         .bind = nvkm_dmaobj_bind,
  65 };
  66
  67 int
  68 nvkm_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 }