LXR linux/drivers/gpu/drm/nouveau/nvif/fifo.c

   1/*
   2 * Copyright 2018 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#include <nvif/fifo.h>
  23
  24static int
  25nvif_fifo_runlists(struct nvif_device *device)
  26{
  27        struct nvif_object *object = &device->object;
  28        struct {
  29                struct nv_device_info_v1 m;
  30                struct {
  31                        struct nv_device_info_v1_data runlists;
  32                        struct nv_device_info_v1_data runlist[64];
  33                } v;
  34        } *a;
  35        int ret, i;
  36
  37        if (device->runlist)
  38                return 0;
  39
  40        if (!(a = kmalloc(sizeof(*a), GFP_KERNEL)))
  41                return -ENOMEM;
  42        a->m.version = 1;
  43        a->m.count = sizeof(a->v) / sizeof(a->v.runlists);
  44        a->v.runlists.mthd = NV_DEVICE_HOST_RUNLISTS;
  45        for (i = 0; i < ARRAY_SIZE(a->v.runlist); i++) {
  46                a->v.runlist[i].mthd = NV_DEVICE_HOST_RUNLIST_ENGINES;
  47                a->v.runlist[i].data = i;
  48        }
  49
  50        ret = nvif_object_mthd(object, NV_DEVICE_V0_INFO, a, sizeof(*a));
  51        if (ret)
  52                goto done;
  53
  54        device->runlists = fls64(a->v.runlists.data);
  55        device->runlist = kcalloc(device->runlists, sizeof(*device->runlist),
  56                                  GFP_KERNEL);
  57        if (!device->runlist) {
  58                ret = -ENOMEM;
  59                goto done;
  60        }
  61
  62        for (i = 0; i < device->runlists; i++) {
  63                if (a->v.runlist[i].mthd != NV_DEVICE_INFO_INVALID)
  64                        device->runlist[i].engines = a->v.runlist[i].data;
  65        }
  66
  67done:
  68        kfree(a);
  69        return ret;
  70}
  71
  72u64
  73nvif_fifo_runlist(struct nvif_device *device, u64 engine)
  74{
  75        u64 runm = 0;
  76        int ret, i;
  77
  78        if ((ret = nvif_fifo_runlists(device)))
  79                return runm;
  80
  81        for (i = 0; i < device->runlists; i++) {
  82                if (device->runlist[i].engines & engine)
  83                        runm |= BIT_ULL(i);
  84        }
  85
  86        return runm;
  87}
  88