drivers/gpu/drm/nouveau/nvkm/engine/disp/ior.c

   1 /*
   2  * Copyright 2017 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 #include "ior.h"
  25
  26 static const char *
  27 nvkm_ior_name[] = {
  28         [DAC] = "DAC",
  29         [SOR] = "SOR",
  30         [PIOR] = "PIOR",
  31 };
  32
  33 struct nvkm_ior *
  34 nvkm_ior_find(struct nvkm_disp *disp, enum nvkm_ior_type type, int id)
  35 {
  36         struct nvkm_ior *ior;
  37         list_for_each_entry(ior, &disp->ior, head) {
  38                 if (ior->type == type && (id < 0 || ior->id == id))
  39                         return ior;
  40         }
  41         return NULL;
  42 }
  43
  44 void
  45 nvkm_ior_del(struct nvkm_ior **pior)
  46 {
  47         struct nvkm_ior *ior = *pior;
  48         if (ior) {
  49                 IOR_DBG(ior, "dtor");
  50                 list_del(&ior->head);
  51                 kfree(*pior);
  52                 *pior = NULL;
  53         }
  54 }
  55
  56 int
  57 nvkm_ior_new_(const struct nvkm_ior_func *func, struct nvkm_disp *disp,
  58               enum nvkm_ior_type type, int id)
  59 {
  60         struct nvkm_ior *ior;
  61         if (!(ior = kzalloc(sizeof(*ior), GFP_KERNEL)))
  62                 return -ENOMEM;
  63         ior->func = func;
  64         ior->disp = disp;
  65         ior->type = type;
  66         ior->id = id;
  67         snprintf(ior->name, sizeof(ior->name), "%s-%d",
  68                  nvkm_ior_name[ior->type], ior->id);
  69         list_add_tail(&ior->head, &disp->ior);
  70         IOR_DBG(ior, "ctor");
  71         return 0;
  72 }