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

source code of linux/drivers/gpu/drm/nouveau/nvif/fifo.c