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_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
  65done:
  66        kfree(a);
  67        return ret;
  68}
  69
  70u64
  71nvif_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}
 100