drivers/gpu/drm/nouveau/nvif/client.c

   1 /*
   2  * Copyright 2013 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 <bskeggs@redhat.com>
  23  */
  24
  25 #include <nvif/client.h>
  26 #include <nvif/driver.h>
  27 #include <nvif/ioctl.h>
  28
  29 int
  30 nvif_client_ioctl(struct nvif_client *client, void *data, u32 size)
  31 {
  32         return client->driver->ioctl(client->object.priv, client->super, data, size, NULL);
  33 }
  34
  35 int
  36 nvif_client_suspend(struct nvif_client *client)
  37 {
  38         return client->driver->suspend(client->object.priv);
  39 }
  40
  41 int
  42 nvif_client_resume(struct nvif_client *client)
  43 {
  44         return client->driver->resume(client->object.priv);
  45 }
  46
  47 void
  48 nvif_client_fini(struct nvif_client *client)
  49 {
  50         if (client->driver) {
  51                 client->driver->fini(client->object.priv);
  52                 client->driver = NULL;
  53                 client->object.client = NULL;
  54                 nvif_object_fini(&client->object);
  55         }
  56 }
  57
  58 const struct nvif_driver *
  59 nvif_drivers[] = {
  60 #ifdef __KERNEL__
  61         &nvif_driver_nvkm,
  62 #else
  63         &nvif_driver_drm,
  64         &nvif_driver_lib,
  65         &nvif_driver_null,
  66 #endif
  67         NULL
  68 };
  69
  70 int
  71 nvif_client_init(const char *driver, const char *name, u64 device,
  72                  const char *cfg, const char *dbg, struct nvif_client *client)
  73 {
  74         struct {
  75                 struct nvif_ioctl_v0 ioctl;
  76                 struct nvif_ioctl_nop_v0 nop;
  77         } args = {};
  78         int ret, i;
  79
  80         ret = nvif_object_init(NULL, 0, 0, NULL, 0, &client->object);
  81         if (ret)
  82                 return ret;
  83
  84         client->object.client = client;
  85         client->object.handle = ~0;
  86         client->route = NVIF_IOCTL_V0_ROUTE_NVIF;
  87         client->super = true;
  88
  89         for (i = 0, ret = -EINVAL; (client->driver = nvif_drivers[i]); i++) {
  90                 if (!driver || !strcmp(client->driver->name, driver)) {
  91                         ret = client->driver->init(name, device, cfg, dbg,
  92                                                   &client->object.priv);
  93                         if (!ret || driver)
  94                                 break;
  95                 }
  96         }
  97
  98         if (ret == 0) {
  99                 ret = nvif_client_ioctl(client, &args, sizeof(args));
 100                 client->version = args.nop.version;
 101         }
 102
 103         if (ret)
 104                 nvif_client_fini(client);
 105         return ret;
 106 }