drm/nouveau/kms/nv50-: fix case where notifier buffer is at offset 0
[linux-2.6-microblaze.git] / drivers / gpu / drm / nouveau / dispnv50 / wimmc37b.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 "wimm.h"
23 #include "atom.h"
24 #include "wndw.h"
25
26 #include <nvif/clc37b.h>
27 #include <nvif/pushc37b.h>
28
29 #include <nvhw/class/clc37b.h>
30
31 static int
32 wimmc37b_update(struct nv50_wndw *wndw, u32 *interlock)
33 {
34         struct nvif_push *push = wndw->wimm.push;
35         int ret;
36
37         if ((ret = PUSH_WAIT(push, 2)))
38                 return ret;
39
40         PUSH_MTHD(push, NVC37B, UPDATE, 0x00000001 |
41                   NVVAL(NVC37B, UPDATE, INTERLOCK_WITH_WINDOW,
42                         !!(interlock[NV50_DISP_INTERLOCK_WNDW] & wndw->interlock.data)));
43         return PUSH_KICK(push);
44 }
45
46 static int
47 wimmc37b_point(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
48 {
49         struct nvif_push *push = wndw->wimm.push;
50         int ret;
51
52         if ((ret = PUSH_WAIT(push, 2)))
53                 return ret;
54
55         PUSH_MTHD(push, NVC37B, SET_POINT_OUT(0),
56                   NVVAL(NVC37B, SET_POINT_OUT, X, asyw->point.x) |
57                   NVVAL(NVC37B, SET_POINT_OUT, Y, asyw->point.y));
58         return 0;
59 }
60
61 static const struct nv50_wimm_func
62 wimmc37b = {
63         .point = wimmc37b_point,
64         .update = wimmc37b_update,
65 };
66
67 static int
68 wimmc37b_init_(const struct nv50_wimm_func *func, struct nouveau_drm *drm,
69                s32 oclass, struct nv50_wndw *wndw)
70 {
71         struct nvc37b_window_imm_channel_dma_v0 args = {
72                 .pushbuf = 0xb0007b00 | wndw->id,
73                 .index = wndw->id,
74         };
75         struct nv50_disp *disp = nv50_disp(drm->dev);
76         int ret;
77
78         ret = nv50_dmac_create(&drm->client.device, &disp->disp->object,
79                                &oclass, 0, &args, sizeof(args), -1,
80                                &wndw->wimm);
81         if (ret) {
82                 NV_ERROR(drm, "wimm%04x allocation failed: %d\n", oclass, ret);
83                 return ret;
84         }
85
86         wndw->interlock.wimm = wndw->interlock.data;
87         wndw->immd = func;
88         return 0;
89 }
90
91 int
92 wimmc37b_init(struct nouveau_drm *drm, s32 oclass, struct nv50_wndw *wndw)
93 {
94         return wimmc37b_init_(&wimmc37b, drm, oclass, wndw);
95 }