1 /* $NetBSD: nouveau_nvkm_subdev_ltc_base.c,v 1.3 2021/12/18 23:45:40 riastradh Exp $ */
2
3 /*
4 * Copyright 2014 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_subdev_ltc_base.c,v 1.3 2021/12/18 23:45:40 riastradh Exp $");
28
29 #include "priv.h"
30
31 #include <core/memory.h>
32
33 void
nvkm_ltc_tags_clear(struct nvkm_device * device,u32 first,u32 count)34 nvkm_ltc_tags_clear(struct nvkm_device *device, u32 first, u32 count)
35 {
36 struct nvkm_ltc *ltc = device->ltc;
37 const u32 limit = first + count - 1;
38
39 BUG_ON((first > limit) || (limit >= ltc->num_tags));
40
41 mutex_lock(<c->subdev.mutex);
42 ltc->func->cbc_clear(ltc, first, limit);
43 ltc->func->cbc_wait(ltc);
44 mutex_unlock(<c->subdev.mutex);
45 }
46
47 int
nvkm_ltc_zbc_color_get(struct nvkm_ltc * ltc,int index,const u32 color[4])48 nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4])
49 {
50 memcpy(ltc->zbc_color[index], color, sizeof(ltc->zbc_color[index]));
51 ltc->func->zbc_clear_color(ltc, index, color);
52 return index;
53 }
54
55 int
nvkm_ltc_zbc_depth_get(struct nvkm_ltc * ltc,int index,const u32 depth)56 nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth)
57 {
58 ltc->zbc_depth[index] = depth;
59 ltc->func->zbc_clear_depth(ltc, index, depth);
60 return index;
61 }
62
63 int
nvkm_ltc_zbc_stencil_get(struct nvkm_ltc * ltc,int index,const u32 stencil)64 nvkm_ltc_zbc_stencil_get(struct nvkm_ltc *ltc, int index, const u32 stencil)
65 {
66 ltc->zbc_stencil[index] = stencil;
67 ltc->func->zbc_clear_stencil(ltc, index, stencil);
68 return index;
69 }
70
71 void
nvkm_ltc_invalidate(struct nvkm_ltc * ltc)72 nvkm_ltc_invalidate(struct nvkm_ltc *ltc)
73 {
74 if (ltc->func->invalidate)
75 ltc->func->invalidate(ltc);
76 }
77
78 void
nvkm_ltc_flush(struct nvkm_ltc * ltc)79 nvkm_ltc_flush(struct nvkm_ltc *ltc)
80 {
81 if (ltc->func->flush)
82 ltc->func->flush(ltc);
83 }
84
85 static void
nvkm_ltc_intr(struct nvkm_subdev * subdev)86 nvkm_ltc_intr(struct nvkm_subdev *subdev)
87 {
88 struct nvkm_ltc *ltc = nvkm_ltc(subdev);
89 ltc->func->intr(ltc);
90 }
91
92 static int
nvkm_ltc_oneinit(struct nvkm_subdev * subdev)93 nvkm_ltc_oneinit(struct nvkm_subdev *subdev)
94 {
95 struct nvkm_ltc *ltc = nvkm_ltc(subdev);
96 return ltc->func->oneinit(ltc);
97 }
98
99 static int
nvkm_ltc_init(struct nvkm_subdev * subdev)100 nvkm_ltc_init(struct nvkm_subdev *subdev)
101 {
102 struct nvkm_ltc *ltc = nvkm_ltc(subdev);
103 int i;
104
105 for (i = ltc->zbc_min; i <= ltc->zbc_max; i++) {
106 ltc->func->zbc_clear_color(ltc, i, ltc->zbc_color[i]);
107 ltc->func->zbc_clear_depth(ltc, i, ltc->zbc_depth[i]);
108 if (ltc->func->zbc_clear_stencil)
109 ltc->func->zbc_clear_stencil(ltc, i, ltc->zbc_stencil[i]);
110 }
111
112 ltc->func->init(ltc);
113 return 0;
114 }
115
116 static void *
nvkm_ltc_dtor(struct nvkm_subdev * subdev)117 nvkm_ltc_dtor(struct nvkm_subdev *subdev)
118 {
119 struct nvkm_ltc *ltc = nvkm_ltc(subdev);
120 nvkm_memory_unref(<c->tag_ram);
121 return ltc;
122 }
123
124 static const struct nvkm_subdev_func
125 nvkm_ltc = {
126 .dtor = nvkm_ltc_dtor,
127 .oneinit = nvkm_ltc_oneinit,
128 .init = nvkm_ltc_init,
129 .intr = nvkm_ltc_intr,
130 };
131
132 int
nvkm_ltc_new_(const struct nvkm_ltc_func * func,struct nvkm_device * device,int index,struct nvkm_ltc ** pltc)133 nvkm_ltc_new_(const struct nvkm_ltc_func *func, struct nvkm_device *device,
134 int index, struct nvkm_ltc **pltc)
135 {
136 struct nvkm_ltc *ltc;
137
138 if (!(ltc = *pltc = kzalloc(sizeof(*ltc), GFP_KERNEL)))
139 return -ENOMEM;
140
141 nvkm_subdev_ctor(&nvkm_ltc, device, index, <c->subdev);
142 ltc->func = func;
143 ltc->zbc_min = 1; /* reserve 0 for disabled */
144 ltc->zbc_max = min(func->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
145 return 0;
146 }
147