1 /*
2  * Copyright 2014 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  * Authors: Ben Skeggs <bskeggs@redhat.com>
23  */
24 #include "priv.h"
25 
26 #include <subdev/fb.h>
27 
28 int
29 nvkm_ltc_tags_alloc(struct nvkm_ltc *ltc, u32 n, struct nvkm_mm_node **pnode)
30 {
31 	int ret = nvkm_mm_head(&ltc->tags, 0, 1, n, n, 1, pnode);
32 	if (ret)
33 		*pnode = NULL;
34 	return ret;
35 }
36 
37 void
38 nvkm_ltc_tags_free(struct nvkm_ltc *ltc, struct nvkm_mm_node **pnode)
39 {
40 	nvkm_mm_free(&ltc->tags, pnode);
41 }
42 
43 void
44 nvkm_ltc_tags_clear(struct nvkm_ltc *ltc, u32 first, u32 count)
45 {
46 	const u32 limit = first + count - 1;
47 
48 	BUG_ON((first > limit) || (limit >= ltc->num_tags));
49 
50 	mutex_lock(&ltc->subdev.mutex);
51 	ltc->func->cbc_clear(ltc, first, limit);
52 	ltc->func->cbc_wait(ltc);
53 	mutex_unlock(&ltc->subdev.mutex);
54 }
55 
56 int
57 nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4])
58 {
59 	memcpy(ltc->zbc_color[index], color, sizeof(ltc->zbc_color[index]));
60 	ltc->func->zbc_clear_color(ltc, index, color);
61 	return index;
62 }
63 
64 int
65 nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth)
66 {
67 	ltc->zbc_depth[index] = depth;
68 	ltc->func->zbc_clear_depth(ltc, index, depth);
69 	return index;
70 }
71 
72 void
73 nvkm_ltc_invalidate(struct nvkm_ltc *ltc)
74 {
75 	if (ltc->func->invalidate)
76 		ltc->func->invalidate(ltc);
77 }
78 
79 void
80 nvkm_ltc_flush(struct nvkm_ltc *ltc)
81 {
82 	if (ltc->func->flush)
83 		ltc->func->flush(ltc);
84 }
85 
86 static void
87 nvkm_ltc_intr(struct nvkm_subdev *subdev)
88 {
89 	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
90 	ltc->func->intr(ltc);
91 }
92 
93 static int
94 nvkm_ltc_oneinit(struct nvkm_subdev *subdev)
95 {
96 	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
97 	return ltc->func->oneinit(ltc);
98 }
99 
100 static int
101 nvkm_ltc_init(struct nvkm_subdev *subdev)
102 {
103 	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
104 	int i;
105 
106 	for (i = ltc->zbc_min; i <= ltc->zbc_max; i++) {
107 		ltc->func->zbc_clear_color(ltc, i, ltc->zbc_color[i]);
108 		ltc->func->zbc_clear_depth(ltc, i, ltc->zbc_depth[i]);
109 	}
110 
111 	ltc->func->init(ltc);
112 	return 0;
113 }
114 
115 static void *
116 nvkm_ltc_dtor(struct nvkm_subdev *subdev)
117 {
118 	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
119 	struct nvkm_ram *ram = ltc->subdev.device->fb->ram;
120 	nvkm_mm_fini(&ltc->tags);
121 	if (ram)
122 		nvkm_mm_free(&ram->vram, &ltc->tag_ram);
123 	return ltc;
124 }
125 
126 static const struct nvkm_subdev_func
127 nvkm_ltc = {
128 	.dtor = nvkm_ltc_dtor,
129 	.oneinit = nvkm_ltc_oneinit,
130 	.init = nvkm_ltc_init,
131 	.intr = nvkm_ltc_intr,
132 };
133 
134 int
135 nvkm_ltc_new_(const struct nvkm_ltc_func *func, struct nvkm_device *device,
136 	      int index, struct nvkm_ltc **pltc)
137 {
138 	struct nvkm_ltc *ltc;
139 
140 	if (!(ltc = *pltc = kzalloc(sizeof(*ltc), GFP_KERNEL)))
141 		return -ENOMEM;
142 
143 	nvkm_subdev_ctor(&nvkm_ltc, device, index, &ltc->subdev);
144 	ltc->func = func;
145 	ltc->zbc_min = 1; /* reserve 0 for disabled */
146 	ltc->zbc_max = min(func->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
147 	return 0;
148 }
149