kernel/drivers/gpu/drm/nouveau/nvkm/core/handle.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 <core/handle.h>
  25 #include <core/client.h>
  26
  27 #define hprintk(h,l,f,a...) do {                                               \
  28         struct nvkm_client *c = nvkm_client((h)->object);                      \
  29         struct nvkm_handle *p = (h)->parent; u32 n = p ? p->name : ~0;         \
  30         nv_printk((c), l, "0x%08x:0x%08x "f, n, (h)->name, ##a);               \
  31 } while(0)
  32
  33 int
  34 nvkm_handle_init(struct nvkm_handle *handle)
  35 {
  36         struct nvkm_handle *item;
  37         int ret;
  38
  39         hprintk(handle, TRACE, "init running\n");
  40         ret = nvkm_object_inc(handle->object);
  41         if (ret)
  42                 return ret;
  43
  44         hprintk(handle, TRACE, "init children\n");
  45         list_for_each_entry(item, &handle->tree, head) {
  46                 ret = nvkm_handle_init(item);
  47                 if (ret)
  48                         goto fail;
  49         }
  50
  51         hprintk(handle, TRACE, "init completed\n");
  52         return 0;
  53 fail:
  54         hprintk(handle, ERROR, "init failed with %d\n", ret);
  55         list_for_each_entry_continue_reverse(item, &handle->tree, head) {
  56                 nvkm_handle_fini(item, false);
  57         }
  58
  59         nvkm_object_dec(handle->object, false);
  60         return ret;
  61 }
  62
  63 int
  64 nvkm_handle_fini(struct nvkm_handle *handle, bool suspend)
  65 {
  66         static char *name[2] = { "fini", "suspend" };
  67         struct nvkm_handle *item;
  68         int ret;
  69
  70         hprintk(handle, TRACE, "%s children\n", name[suspend]);
  71         list_for_each_entry(item, &handle->tree, head) {
  72                 ret = nvkm_handle_fini(item, suspend);
  73                 if (ret && suspend)
  74                         goto fail;
  75         }
  76
  77         hprintk(handle, TRACE, "%s running\n", name[suspend]);
  78         if (handle->object) {
  79                 ret = nvkm_object_dec(handle->object, suspend);
  80                 if (ret && suspend)
  81                         goto fail;
  82         }
  83
  84         hprintk(handle, TRACE, "%s completed\n", name[suspend]);
  85         return 0;
  86 fail:
  87         hprintk(handle, ERROR, "%s failed with %d\n", name[suspend], ret);
  88         list_for_each_entry_continue_reverse(item, &handle->tree, head) {
  89                 int rret = nvkm_handle_init(item);
  90                 if (rret)
  91                         hprintk(handle, FATAL, "failed to restart, %d\n", rret);
  92         }
  93
  94         return ret;
  95 }
  96
  97 int
  98 nvkm_handle_create(struct nvkm_object *parent, u32 _parent, u32 _handle,
  99                    struct nvkm_object *object, struct nvkm_handle **phandle)
 100 {
 101         struct nvkm_object *namedb;
 102         struct nvkm_handle *handle;
 103         int ret;
 104
 105         namedb = parent;
 106         while (!nv_iclass(namedb, NV_NAMEDB_CLASS))
 107                 namedb = namedb->parent;
 108
 109         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
 110         if (!handle)
 111                 return -ENOMEM;
 112
 113         INIT_LIST_HEAD(&handle->head);
 114         INIT_LIST_HEAD(&handle->tree);
 115         handle->name = _handle;
 116         handle->priv = ~0;
 117
 118         ret = nvkm_namedb_insert(nv_namedb(namedb), _handle, object, handle);
 119         if (ret) {
 120                 kfree(handle);
 121                 return ret;
 122         }
 123
 124         if (nv_parent(parent)->object_attach) {
 125                 ret = nv_parent(parent)->object_attach(parent, object, _handle);
 126                 if (ret < 0) {
 127                         nvkm_handle_destroy(handle);
 128                         return ret;
 129                 }
 130
 131                 handle->priv = ret;
 132         }
 133
 134         if (object != namedb) {
 135                 while (!nv_iclass(namedb, NV_CLIENT_CLASS))
 136                         namedb = namedb->parent;
 137
 138                 handle->parent = nvkm_namedb_get(nv_namedb(namedb), _parent);
 139                 if (handle->parent) {
 140                         list_add(&handle->head, &handle->parent->tree);
 141                         nvkm_namedb_put(handle->parent);
 142                 }
 143         }
 144
 145         hprintk(handle, TRACE, "created\n");
 146         *phandle = handle;
 147         return 0;
 148 }
 149
 150 void
 151 nvkm_handle_destroy(struct nvkm_handle *handle)
 152 {
 153         struct nvkm_handle *item, *temp;
 154
 155         hprintk(handle, TRACE, "destroy running\n");
 156         list_for_each_entry_safe(item, temp, &handle->tree, head) {
 157                 nvkm_handle_destroy(item);
 158         }
 159         list_del(&handle->head);
 160
 161         if (handle->priv != ~0) {
 162                 struct nvkm_object *parent = handle->parent->object;
 163                 nv_parent(parent)->object_detach(parent, handle->priv);
 164         }
 165
 166         hprintk(handle, TRACE, "destroy completed\n");
 167         nvkm_namedb_remove(handle);
 168         kfree(handle);
 169 }
 170
 171 struct nvkm_object *
 172 nvkm_handle_ref(struct nvkm_object *parent, u32 name)
 173 {
 174         struct nvkm_object *object = NULL;
 175         struct nvkm_handle *handle;
 176
 177         while (!nv_iclass(parent, NV_NAMEDB_CLASS))
 178                 parent = parent->parent;
 179
 180         handle = nvkm_namedb_get(nv_namedb(parent), name);
 181         if (handle) {
 182                 nvkm_object_ref(handle->object, &object);
 183                 nvkm_namedb_put(handle);
 184         }
 185
 186         return object;
 187 }
 188
 189 struct nvkm_handle *
 190 nvkm_handle_get_class(struct nvkm_object *engctx, u16 oclass)
 191 {
 192         struct nvkm_namedb *namedb;
 193         if (engctx && (namedb = (void *)nv_pclass(engctx, NV_NAMEDB_CLASS)))
 194                 return nvkm_namedb_get_class(namedb, oclass);
 195         return NULL;
 196 }
 197
 198 struct nvkm_handle *
 199 nvkm_handle_get_vinst(struct nvkm_object *engctx, u64 vinst)
 200 {
 201         struct nvkm_namedb *namedb;
 202         if (engctx && (namedb = (void *)nv_pclass(engctx, NV_NAMEDB_CLASS)))
 203                 return nvkm_namedb_get_vinst(namedb, vinst);
 204         return NULL;
 205 }
 206
 207 struct nvkm_handle *
 208 nvkm_handle_get_cinst(struct nvkm_object *engctx, u32 cinst)
 209 {
 210         struct nvkm_namedb *namedb;
 211         if (engctx && (namedb = (void *)nv_pclass(engctx, NV_NAMEDB_CLASS)))
 212                 return nvkm_namedb_get_cinst(namedb, cinst);
 213         return NULL;
 214 }
 215
 216 void
 217 nvkm_handle_put(struct nvkm_handle *handle)
 218 {
 219         if (handle)
 220                 nvkm_namedb_put(handle);
 221 }