1 /* $NetBSD: nouveau_nvkm_engine_disp_dmacgp102.c,v 1.2 2021/12/18 23:45:35 riastradh Exp $ */
2
3 /*
4 * Copyright 2016 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_disp_dmacgp102.c,v 1.2 2021/12/18 23:45:35 riastradh Exp $");
28
29 #include "channv50.h"
30
31 #include <subdev/timer.h>
32
33 static int
gp102_disp_dmac_init(struct nv50_disp_chan * chan)34 gp102_disp_dmac_init(struct nv50_disp_chan *chan)
35 {
36 struct nvkm_subdev *subdev = &chan->disp->base.engine.subdev;
37 struct nvkm_device *device = subdev->device;
38 int ctrl = chan->chid.ctrl;
39 int user = chan->chid.user;
40
41 /* initialise channel for dma command submission */
42 nvkm_wr32(device, 0x611494 + (ctrl * 0x0010), chan->push);
43 nvkm_wr32(device, 0x611498 + (ctrl * 0x0010), 0x00010000);
44 nvkm_wr32(device, 0x61149c + (ctrl * 0x0010), 0x00000001);
45 nvkm_mask(device, 0x610490 + (ctrl * 0x0010), 0x00000010, 0x00000010);
46 nvkm_wr32(device, 0x640000 + (ctrl * 0x1000), 0x00000000);
47 nvkm_wr32(device, 0x610490 + (ctrl * 0x0010), 0x00000013);
48
49 /* wait for it to go inactive */
50 if (nvkm_msec(device, 2000,
51 if (!(nvkm_rd32(device, 0x610490 + (ctrl * 0x10)) & 0x80000000))
52 break;
53 ) < 0) {
54 nvkm_error(subdev, "ch %d init: %08x\n", user,
55 nvkm_rd32(device, 0x610490 + (ctrl * 0x10)));
56 return -EBUSY;
57 }
58
59 return 0;
60 }
61
62 const struct nv50_disp_chan_func
63 gp102_disp_dmac_func = {
64 .init = gp102_disp_dmac_init,
65 .fini = gf119_disp_dmac_fini,
66 .intr = gf119_disp_chan_intr,
67 .user = nv50_disp_chan_user,
68 .bind = gf119_disp_dmac_bind,
69 };
70