kernel/drivers/gpu/drm/nouveau/nvkm/core/client.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/client.h>
  25 #include <core/device.h>
  26 #include <core/handle.h>
  27 #include <core/notify.h>
  28 #include <core/option.h>
  29
  30 #include <nvif/class.h>
  31 #include <nvif/event.h>
  32 #include <nvif/unpack.h>
  33
  34 struct nvkm_client_notify {
  35         struct nvkm_client *client;
  36         struct nvkm_notify n;
  37         u8 version;
  38         u8 size;
  39         union {
  40                 struct nvif_notify_rep_v0 v0;
  41         } rep;
  42 };
  43
  44 static int
  45 nvkm_client_notify(struct nvkm_notify *n)
  46 {
  47         struct nvkm_client_notify *notify = container_of(n, typeof(*notify), n);
  48         struct nvkm_client *client = notify->client;
  49         return client->ntfy(&notify->rep, notify->size, n->data, n->size);
  50 }
  51
  52 int
  53 nvkm_client_notify_put(struct nvkm_client *client, int index)
  54 {
  55         if (index < ARRAY_SIZE(client->notify)) {
  56                 if (client->notify[index]) {
  57                         nvkm_notify_put(&client->notify[index]->n);
  58                         return 0;
  59                 }
  60         }
  61         return -ENOENT;
  62 }
  63
  64 int
  65 nvkm_client_notify_get(struct nvkm_client *client, int index)
  66 {
  67         if (index < ARRAY_SIZE(client->notify)) {
  68                 if (client->notify[index]) {
  69                         nvkm_notify_get(&client->notify[index]->n);
  70                         return 0;
  71                 }
  72         }
  73         return -ENOENT;
  74 }
  75
  76 int
  77 nvkm_client_notify_del(struct nvkm_client *client, int index)
  78 {
  79         if (index < ARRAY_SIZE(client->notify)) {
  80                 if (client->notify[index]) {
  81                         nvkm_notify_fini(&client->notify[index]->n);
  82                         kfree(client->notify[index]);
  83                         client->notify[index] = NULL;
  84                         return 0;
  85                 }
  86         }
  87         return -ENOENT;
  88 }
  89
  90 int
  91 nvkm_client_notify_new(struct nvkm_object *object,
  92                        struct nvkm_event *event, void *data, u32 size)
  93 {
  94         struct nvkm_client *client = nvkm_client(object);
  95         struct nvkm_client_notify *notify;
  96         union {
  97                 struct nvif_notify_req_v0 v0;
  98         } *req = data;
  99         u8  index, reply;
 100         int ret;
 101
 102         for (index = 0; index < ARRAY_SIZE(client->notify); index++) {
 103                 if (!client->notify[index])
 104                         break;
 105         }
 106
 107         if (index == ARRAY_SIZE(client->notify))
 108                 return -ENOSPC;
 109
 110         notify = kzalloc(sizeof(*notify), GFP_KERNEL);
 111         if (!notify)
 112                 return -ENOMEM;
 113
 114         nv_ioctl(client, "notify new size %d\n", size);
 115         if (nvif_unpack(req->v0, 0, 0, true)) {
 116                 nv_ioctl(client, "notify new vers %d reply %d route %02x "
 117                                  "token %llx\n", req->v0.version,
 118                          req->v0.reply, req->v0.route, req->v0.token);
 119                 notify->version = req->v0.version;
 120                 notify->size = sizeof(notify->rep.v0);
 121                 notify->rep.v0.version = req->v0.version;
 122                 notify->rep.v0.route = req->v0.route;
 123                 notify->rep.v0.token = req->v0.token;
 124                 reply = req->v0.reply;
 125         }
 126
 127         if (ret == 0) {
 128                 ret = nvkm_notify_init(object, event, nvkm_client_notify,
 129                                        false, data, size, reply, &notify->n);
 130                 if (ret == 0) {
 131                         client->notify[index] = notify;
 132                         notify->client = client;
 133                         return index;
 134                 }
 135         }
 136
 137         kfree(notify);
 138         return ret;
 139 }
 140
 141 static int
 142 nvkm_client_mthd_devlist(struct nvkm_object *object, void *data, u32 size)
 143 {
 144         union {
 145                 struct nv_client_devlist_v0 v0;
 146         } *args = data;
 147         int ret;
 148
 149         nv_ioctl(object, "client devlist size %d\n", size);
 150         if (nvif_unpack(args->v0, 0, 0, true)) {
 151                 nv_ioctl(object, "client devlist vers %d count %d\n",
 152                          args->v0.version, args->v0.count);
 153                 if (size == sizeof(args->v0.device[0]) * args->v0.count) {
 154                         ret = nvkm_device_list(args->v0.device, args->v0.count);
 155                         if (ret >= 0) {
 156                                 args->v0.count = ret;
 157                                 ret = 0;
 158                         }
 159                 } else {
 160                         ret = -EINVAL;
 161                 }
 162         }
 163
 164         return ret;
 165 }
 166
 167 static int
 168 nvkm_client_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 169 {
 170         switch (mthd) {
 171         case NV_CLIENT_DEVLIST:
 172                 return nvkm_client_mthd_devlist(object, data, size);
 173         default:
 174                 break;
 175         }
 176         return -EINVAL;
 177 }
 178
 179 static void
 180 nvkm_client_dtor(struct nvkm_object *object)
 181 {
 182         struct nvkm_client *client = (void *)object;
 183         int i;
 184         for (i = 0; i < ARRAY_SIZE(client->notify); i++)
 185                 nvkm_client_notify_del(client, i);
 186         nvkm_object_ref(NULL, &client->device);
 187         nvkm_handle_destroy(client->root);
 188         nvkm_namedb_destroy(&client->namedb);
 189 }
 190
 191 static struct nvkm_oclass
 192 nvkm_client_oclass = {
 193         .ofuncs = &(struct nvkm_ofuncs) {
 194                 .dtor = nvkm_client_dtor,
 195                 .mthd = nvkm_client_mthd,
 196         },
 197 };
 198
 199 int
 200 nvkm_client_create_(const char *name, u64 devname, const char *cfg,
 201                     const char *dbg, int length, void **pobject)
 202 {
 203         struct nvkm_object *device;
 204         struct nvkm_client *client;
 205         int ret;
 206
 207         device = (void *)nvkm_device_find(devname);
 208         if (!device)
 209                 return -ENODEV;
 210
 211         ret = nvkm_namedb_create_(NULL, NULL, &nvkm_client_oclass,
 212                                   NV_CLIENT_CLASS, NULL,
 213                                   (1ULL << NVDEV_ENGINE_DEVICE),
 214                                   length, pobject);
 215         client = *pobject;
 216         if (ret)
 217                 return ret;
 218
 219         ret = nvkm_handle_create(nv_object(client), ~0, ~0, nv_object(client),
 220                                  &client->root);
 221         if (ret)
 222                 return ret;
 223
 224         /* prevent init/fini being called, os in in charge of this */
 225         atomic_set(&nv_object(client)->usecount, 2);
 226
 227         nvkm_object_ref(device, &client->device);
 228         snprintf(client->name, sizeof(client->name), "%s", name);
 229         client->debug = nvkm_dbgopt(dbg, "CLIENT");
 230         return 0;
 231 }
 232
 233 int
 234 nvkm_client_init(struct nvkm_client *client)
 235 {
 236         int ret;
 237         nv_debug(client, "init running\n");
 238         ret = nvkm_handle_init(client->root);
 239         nv_debug(client, "init completed with %d\n", ret);
 240         return ret;
 241 }
 242
 243 int
 244 nvkm_client_fini(struct nvkm_client *client, bool suspend)
 245 {
 246         const char *name[2] = { "fini", "suspend" };
 247         int ret, i;
 248         nv_debug(client, "%s running\n", name[suspend]);
 249         nv_debug(client, "%s notify\n", name[suspend]);
 250         for (i = 0; i < ARRAY_SIZE(client->notify); i++)
 251                 nvkm_client_notify_put(client, i);
 252         nv_debug(client, "%s object\n", name[suspend]);
 253         ret = nvkm_handle_fini(client->root, suspend);
 254         nv_debug(client, "%s completed with %d\n", name[suspend], ret);
 255         return ret;
 256 }
 257
 258 const char *
 259 nvkm_client_name(void *obj)
 260 {
 261         const char *client_name = "unknown";
 262         struct nvkm_client *client = nvkm_client(obj);
 263         if (client)
 264                 client_name = client->name;
 265         return client_name;
 266 }