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/notify.h>
  27 #include <core/option.h>
  28
  29 #include <nvif/class.h>
  30 #include <nvif/event.h>
  31 #include <nvif/if0000.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 = object->client;
  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 = -ENOSYS;
 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         nvif_ioctl(object, "notify new size %d\n", size);
 115         if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, true))) {
 116                 nvif_ioctl(object, "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 = -ENOSYS;
 148
 149         nvif_ioctl(object, "client devlist size %d\n", size);
 150         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 151                 nvif_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 int
 180 nvkm_client_child_new(const struct nvkm_oclass *oclass,
 181                       void *data, u32 size, struct nvkm_object **pobject)
 182 {
 183         return oclass->base.ctor(oclass, data, size, pobject);
 184 }
 185
 186 static int
 187 nvkm_client_child_get(struct nvkm_object *object, int index,
 188                       struct nvkm_oclass *oclass)
 189 {
 190         const struct nvkm_sclass *sclass;
 191
 192         switch (index) {
 193         case 0: sclass = &nvkm_udevice_sclass; break;
 194         default:
 195                 return -EINVAL;
 196         }
 197
 198         oclass->ctor = nvkm_client_child_new;
 199         oclass->base = *sclass;
 200         return 0;
 201 }
 202
 203 static const struct nvkm_object_func
 204 nvkm_client_object_func = {
 205         .mthd = nvkm_client_mthd,
 206         .sclass = nvkm_client_child_get,
 207 };
 208
 209 void
 210 nvkm_client_remove(struct nvkm_client *client, struct nvkm_object *object)
 211 {
 212         if (!RB_EMPTY_NODE(&object->node))
 213                 rb_erase(&object->node, &client->objroot);
 214 }
 215
 216 bool
 217 nvkm_client_insert(struct nvkm_client *client, struct nvkm_object *object)
 218 {
 219         struct rb_node **ptr = &client->objroot.rb_node;
 220         struct rb_node *parent = NULL;
 221
 222         while (*ptr) {
 223                 struct nvkm_object *this =
 224                         container_of(*ptr, typeof(*this), node);
 225                 parent = *ptr;
 226                 if (object->object < this->object)
 227                         ptr = &parent->rb_left;
 228                 else
 229                 if (object->object > this->object)
 230                         ptr = &parent->rb_right;
 231                 else
 232                         return false;
 233         }
 234
 235         rb_link_node(&object->node, parent, ptr);
 236         rb_insert_color(&object->node, &client->objroot);
 237         return true;
 238 }
 239
 240 struct nvkm_object *
 241 nvkm_client_search(struct nvkm_client *client, u64 handle)
 242 {
 243         struct rb_node *node = client->objroot.rb_node;
 244         while (node) {
 245                 struct nvkm_object *object =
 246                         container_of(node, typeof(*object), node);
 247                 if (handle < object->object)
 248                         node = node->rb_left;
 249                 else
 250                 if (handle > object->object)
 251                         node = node->rb_right;
 252                 else
 253                         return object;
 254         }
 255         return NULL;
 256 }
 257
 258 int
 259 nvkm_client_fini(struct nvkm_client *client, bool suspend)
 260 {
 261         struct nvkm_object *object = &client->object;
 262         const char *name[2] = { "fini", "suspend" };
 263         int i;
 264         nvif_debug(object, "%s notify\n", name[suspend]);
 265         for (i = 0; i < ARRAY_SIZE(client->notify); i++)
 266                 nvkm_client_notify_put(client, i);
 267         return nvkm_object_fini(&client->object, suspend);
 268 }
 269
 270 int
 271 nvkm_client_init(struct nvkm_client *client)
 272 {
 273         return nvkm_object_init(&client->object);
 274 }
 275
 276 void
 277 nvkm_client_del(struct nvkm_client **pclient)
 278 {
 279         struct nvkm_client *client = *pclient;
 280         int i;
 281         if (client) {
 282                 nvkm_client_fini(client, false);
 283                 for (i = 0; i < ARRAY_SIZE(client->notify); i++)
 284                         nvkm_client_notify_del(client, i);
 285                 nvkm_object_dtor(&client->object);
 286                 kfree(*pclient);
 287                 *pclient = NULL;
 288         }
 289 }
 290
 291 int
 292 nvkm_client_new(const char *name, u64 device, const char *cfg,
 293                 const char *dbg, struct nvkm_client **pclient)
 294 {
 295         struct nvkm_oclass oclass = {};
 296         struct nvkm_client *client;
 297
 298         if (!(client = *pclient = kzalloc(sizeof(*client), GFP_KERNEL)))
 299                 return -ENOMEM;
 300         oclass.client = client;
 301
 302         nvkm_object_ctor(&nvkm_client_object_func, &oclass, &client->object);
 303         snprintf(client->name, sizeof(client->name), "%s", name);
 304         client->device = device;
 305         client->debug = nvkm_dbgopt(dbg, "CLIENT");
 306         client->objroot = RB_ROOT;
 307         client->dmaroot = RB_ROOT;
 308         return 0;
 309 }