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
  24 static int
  25 nvif_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_FIFO_RUNLISTS;
  45         for (i = 0; i < ARRAY_SIZE(a->v.runlist); i++)
  46                 a->v.runlist[i].mthd = NV_DEVICE_FIFO_RUNLIST_ENGINES(i);
  47
  48         ret = nvif_object_mthd(object, NV_DEVICE_V0_INFO, a, sizeof(*a));
  49         if (ret)
  50                 goto done;
  51
  52         device->runlists = fls64(a->v.runlists.data);
  53         device->runlist = kcalloc(device->runlists, sizeof(*device->runlist),
  54                                   GFP_KERNEL);
  55         if (!device->runlist) {
  56                 ret = -ENOMEM;
  57                 goto done;
  58         }
  59
  60         for (i = 0; i < device->runlists; i++) {
  61                 if (a->v.runlists.data & BIT_ULL(i))
  62                         device->runlist[i].engines = a->v.runlist[i].data;
  63         }
  64
  65 done:
  66         kfree(a);
  67         return ret;
  68 }
  69
  70 u64
  71 nvif_fifo_runlist(struct nvif_device *device, u64 engine)
  72 {
  73         struct nvif_object *object = &device->object;
  74         struct {
  75                 struct nv_device_info_v1 m;
  76                 struct {
  77                         struct nv_device_info_v1_data engine;
  78                 } v;
  79         } a = {
  80                 .m.version = 1,
  81                 .m.count = sizeof(a.v) / sizeof(a.v.engine),
  82                 .v.engine.mthd = engine,
  83         };
  84         u64 runm = 0;
  85         int ret, i;
  86
  87         if ((ret = nvif_fifo_runlists(device)))
  88                 return runm;
  89
  90         ret = nvif_object_mthd(object, NV_DEVICE_V0_INFO, &a, sizeof(a));
  91         if (ret == 0) {
  92                 for (i = 0; i < device->runlists; i++) {
  93                         if (device->runlist[i].engines & a.v.engine.data)
  94                                 runm |= BIT_ULL(i);
  95                 }
  96         }
  97
  98         return runm;
  99 }