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