kernel/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/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/engine.h>
  27
  28 /******************************************************************************
  29  * instmem object base implementation
  30  *****************************************************************************/
  31
  32 void
  33 _nvkm_instobj_dtor(struct nvkm_object *object)
  34 {
  35         struct nvkm_instmem *imem = nvkm_instmem(object);
  36         struct nvkm_instobj *iobj = (void *)object;
  37
  38         mutex_lock(&nv_subdev(imem)->mutex);
  39         list_del(&iobj->head);
  40         mutex_unlock(&nv_subdev(imem)->mutex);
  41
  42         return nvkm_object_destroy(&iobj->base);
  43 }
  44
  45 int
  46 nvkm_instobj_create_(struct nvkm_object *parent, struct nvkm_object *engine,
  47                      struct nvkm_oclass *oclass, int length, void **pobject)
  48 {
  49         struct nvkm_instmem *imem = nvkm_instmem(parent);
  50         struct nvkm_instobj *iobj;
  51         int ret;
  52
  53         ret = nvkm_object_create_(parent, engine, oclass, NV_MEMOBJ_CLASS,
  54                                   length, pobject);
  55         iobj = *pobject;
  56         if (ret)
  57                 return ret;
  58
  59         mutex_lock(&imem->base.mutex);
  60         list_add(&iobj->head, &imem->list);
  61         mutex_unlock(&imem->base.mutex);
  62         return 0;
  63 }
  64
  65 /******************************************************************************
  66  * instmem subdev base implementation
  67  *****************************************************************************/
  68
  69 static int
  70 nvkm_instmem_alloc(struct nvkm_instmem *imem, struct nvkm_object *parent,
  71                    u32 size, u32 align, struct nvkm_object **pobject)
  72 {
  73         struct nvkm_instmem_impl *impl = (void *)imem->base.object.oclass;
  74         struct nvkm_instobj_args args = { .size = size, .align = align };
  75         return nvkm_object_ctor(parent, &parent->engine->subdev.object,
  76                                 impl->instobj, &args, sizeof(args), pobject);
  77 }
  78
  79 int
  80 _nvkm_instmem_fini(struct nvkm_object *object, bool suspend)
  81 {
  82         struct nvkm_instmem *imem = (void *)object;
  83         struct nvkm_instobj *iobj;
  84         int i, ret = 0;
  85
  86         if (suspend) {
  87                 mutex_lock(&imem->base.mutex);
  88                 list_for_each_entry(iobj, &imem->list, head) {
  89                         iobj->suspend = vmalloc(iobj->size);
  90                         if (!iobj->suspend) {
  91                                 ret = -ENOMEM;
  92                                 break;
  93                         }
  94
  95                         for (i = 0; i < iobj->size; i += 4)
  96                                 iobj->suspend[i / 4] = nv_ro32(iobj, i);
  97                 }
  98                 mutex_unlock(&imem->base.mutex);
  99                 if (ret)
 100                         return ret;
 101         }
 102
 103         return nvkm_subdev_fini(&imem->base, suspend);
 104 }
 105
 106 int
 107 _nvkm_instmem_init(struct nvkm_object *object)
 108 {
 109         struct nvkm_instmem *imem = (void *)object;
 110         struct nvkm_instobj *iobj;
 111         int ret, i;
 112
 113         ret = nvkm_subdev_init(&imem->base);
 114         if (ret)
 115                 return ret;
 116
 117         mutex_lock(&imem->base.mutex);
 118         list_for_each_entry(iobj, &imem->list, head) {
 119                 if (iobj->suspend) {
 120                         for (i = 0; i < iobj->size; i += 4)
 121                                 nv_wo32(iobj, i, iobj->suspend[i / 4]);
 122                         vfree(iobj->suspend);
 123                         iobj->suspend = NULL;
 124                 }
 125         }
 126         mutex_unlock(&imem->base.mutex);
 127         return 0;
 128 }
 129
 130 int
 131 nvkm_instmem_create_(struct nvkm_object *parent, struct nvkm_object *engine,
 132                      struct nvkm_oclass *oclass, int length, void **pobject)
 133 {
 134         struct nvkm_instmem *imem;
 135         int ret;
 136
 137         ret = nvkm_subdev_create_(parent, engine, oclass, 0, "INSTMEM",
 138                                   "instmem", length, pobject);
 139         imem = *pobject;
 140         if (ret)
 141                 return ret;
 142
 143         INIT_LIST_HEAD(&imem->list);
 144         imem->alloc = nvkm_instmem_alloc;
 145         return 0;
 146 }