LXR linux/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
  26static const char *
  27nvkm_ior_name[] = {
  28        [DAC] = "DAC",
  29        [SOR] = "SOR",
  30        [PIOR] = "PIOR",
  31};
  32
  33struct nvkm_ior *
  34nvkm_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
  44void
  45nvkm_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
  56int
  57nvkm_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}
  73