drivers/gpu/drm/nouveau/core/engine/dmaobj/base.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
  25 #include <core/object.h>
  26 #include <core/client.h>
  27 #include <nvif/unpack.h>
  28 #include <nvif/class.h>
  29
  30 #include <subdev/fb.h>
  31 #include <subdev/instmem.h>
  32
  33 #include "priv.h"
  34
  35 static int
  36 nvkm_dmaobj_bind(struct nouveau_dmaobj *dmaobj, struct nouveau_object *parent,
  37                  struct nouveau_gpuobj **pgpuobj)
  38 {
  39         const struct nvkm_dmaeng_impl *impl = (void *)
  40                 nv_oclass(nv_object(dmaobj)->engine);
  41         int ret = 0;
  42
  43         if (nv_object(dmaobj) == parent) { /* ctor bind */
  44                 if (nv_mclass(parent->parent) == NV_DEVICE) {
  45                         /* delayed, or no, binding */
  46                         return 0;
  47                 }
  48                 ret = impl->bind(dmaobj, parent, pgpuobj);
  49                 if (ret == 0)
  50                         nouveau_object_ref(NULL, &parent);
  51                 return ret;
  52         }
  53
  54         return impl->bind(dmaobj, parent, pgpuobj);
  55 }
  56
  57 int
  58 nvkm_dmaobj_create_(struct nouveau_object *parent,
  59                     struct nouveau_object *engine,
  60                     struct nouveau_oclass *oclass, void **pdata, u32 *psize,
  61                     int length, void **pobject)
  62 {
  63         union {
  64                 struct nv_dma_v0 v0;
  65         } *args = *pdata;
  66         struct nouveau_instmem *instmem = nouveau_instmem(parent);
  67         struct nouveau_client *client = nouveau_client(parent);
  68         struct nouveau_device *device = nv_device(parent);
  69         struct nouveau_fb *pfb = nouveau_fb(parent);
  70         struct nouveau_dmaobj *dmaobj;
  71         void *data = *pdata;
  72         u32 size = *psize;
  73         int ret;
  74
  75         ret = nouveau_object_create_(parent, engine, oclass, 0, length, pobject);
  76         dmaobj = *pobject;
  77         if (ret)
  78                 return ret;
  79
  80         nv_ioctl(parent, "create dma size %d\n", *psize);
  81         if (nvif_unpack(args->v0, 0, 0, true)) {
  82                 nv_ioctl(parent, "create dma vers %d target %d access %d "
  83                                  "start %016llx limit %016llx\n",
  84                          args->v0.version, args->v0.target, args->v0.access,
  85                          args->v0.start, args->v0.limit);
  86                 dmaobj->target = args->v0.target;
  87                 dmaobj->access = args->v0.access;
  88                 dmaobj->start  = args->v0.start;
  89                 dmaobj->limit  = args->v0.limit;
  90         } else
  91                 return ret;
  92
  93         *pdata = data;
  94         *psize = size;
  95
  96         if (dmaobj->start > dmaobj->limit)
  97                 return -EINVAL;
  98
  99         switch (dmaobj->target) {
 100         case NV_DMA_V0_TARGET_VM:
 101                 dmaobj->target = NV_MEM_TARGET_VM;
 102                 break;
 103         case NV_DMA_V0_TARGET_VRAM:
 104                 if (!client->super) {
 105                         if (dmaobj->limit >= pfb->ram->size - instmem->reserved)
 106                                 return -EACCES;
 107                         if (device->card_type >= NV_50)
 108                                 return -EACCES;
 109                 }
 110                 dmaobj->target = NV_MEM_TARGET_VRAM;
 111                 break;
 112         case NV_DMA_V0_TARGET_PCI:
 113                 if (!client->super)
 114                         return -EACCES;
 115                 dmaobj->target = NV_MEM_TARGET_PCI;
 116                 break;
 117         case NV_DMA_V0_TARGET_PCI_US:
 118         case NV_DMA_V0_TARGET_AGP:
 119                 if (!client->super)
 120                         return -EACCES;
 121                 dmaobj->target = NV_MEM_TARGET_PCI_NOSNOOP;
 122                 break;
 123         default:
 124                 return -EINVAL;
 125         }
 126
 127         switch (dmaobj->access) {
 128         case NV_DMA_V0_ACCESS_VM:
 129                 dmaobj->access = NV_MEM_ACCESS_VM;
 130                 break;
 131         case NV_DMA_V0_ACCESS_RD:
 132                 dmaobj->access = NV_MEM_ACCESS_RO;
 133                 break;
 134         case NV_DMA_V0_ACCESS_WR:
 135                 dmaobj->access = NV_MEM_ACCESS_WO;
 136                 break;
 137         case NV_DMA_V0_ACCESS_RDWR:
 138                 dmaobj->access = NV_MEM_ACCESS_RW;
 139                 break;
 140         default:
 141                 return -EINVAL;
 142         }
 143
 144         return ret;
 145 }
 146
 147 int
 148 _nvkm_dmaeng_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 149                   struct nouveau_oclass *oclass, void *data, u32 size,
 150                   struct nouveau_object **pobject)
 151 {
 152         const struct nvkm_dmaeng_impl *impl = (void *)oclass;
 153         struct nouveau_dmaeng *dmaeng;
 154         int ret;
 155
 156         ret = nouveau_engine_create(parent, engine, oclass, true, "DMAOBJ",
 157                                     "dmaobj", &dmaeng);
 158         *pobject = nv_object(dmaeng);
 159         if (ret)
 160                 return ret;
 161
 162         nv_engine(dmaeng)->sclass = impl->sclass;
 163         dmaeng->bind = nvkm_dmaobj_bind;
 164         return 0;
 165 }