1 /*
2  * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20  * DEALINGS IN THE SOFTWARE.
21  */
22 #include "priv.h"
23 
24 #include <core/firmware.h>
25 #include <subdev/top.h>
26 
27 static void
28 nvkm_sec2_recv(struct work_struct *work)
29 {
30 	struct nvkm_sec2 *sec2 = container_of(work, typeof(*sec2), work);
31 
32 	if (!sec2->initmsg_received) {
33 		int ret = sec2->func->initmsg(sec2);
34 		if (ret) {
35 			nvkm_error(&sec2->engine.subdev,
36 				   "error parsing init message: %d\n", ret);
37 			return;
38 		}
39 
40 		sec2->initmsg_received = true;
41 	}
42 
43 	nvkm_falcon_msgq_recv(sec2->msgq);
44 }
45 
46 static void
47 nvkm_sec2_intr(struct nvkm_engine *engine)
48 {
49 	struct nvkm_sec2 *sec2 = nvkm_sec2(engine);
50 	sec2->func->intr(sec2);
51 }
52 
53 static int
54 nvkm_sec2_fini(struct nvkm_engine *engine, bool suspend)
55 {
56 	struct nvkm_sec2 *sec2 = nvkm_sec2(engine);
57 
58 	flush_work(&sec2->work);
59 
60 	if (suspend) {
61 		nvkm_falcon_cmdq_fini(sec2->cmdq);
62 		sec2->initmsg_received = false;
63 	}
64 
65 	return 0;
66 }
67 
68 static void *
69 nvkm_sec2_dtor(struct nvkm_engine *engine)
70 {
71 	struct nvkm_sec2 *sec2 = nvkm_sec2(engine);
72 	nvkm_falcon_msgq_del(&sec2->msgq);
73 	nvkm_falcon_cmdq_del(&sec2->cmdq);
74 	nvkm_falcon_qmgr_del(&sec2->qmgr);
75 	nvkm_falcon_dtor(&sec2->falcon);
76 	return sec2;
77 }
78 
79 static const struct nvkm_engine_func
80 nvkm_sec2 = {
81 	.dtor = nvkm_sec2_dtor,
82 	.fini = nvkm_sec2_fini,
83 	.intr = nvkm_sec2_intr,
84 };
85 
86 int
87 nvkm_sec2_new_(const struct nvkm_sec2_fwif *fwif, struct nvkm_device *device,
88 	       enum nvkm_subdev_type type, int inst, u32 addr, struct nvkm_sec2 **psec2)
89 {
90 	struct nvkm_sec2 *sec2;
91 	int ret;
92 
93 	if (!(sec2 = *psec2 = kzalloc(sizeof(*sec2), GFP_KERNEL)))
94 		return -ENOMEM;
95 
96 	ret = nvkm_engine_ctor(&nvkm_sec2, device, type, inst, true, &sec2->engine);
97 	if (ret)
98 		return ret;
99 
100 	fwif = nvkm_firmware_load(&sec2->engine.subdev, fwif, "Sec2", sec2);
101 	if (IS_ERR(fwif))
102 		return PTR_ERR(fwif);
103 
104 	sec2->func = fwif->func;
105 
106 	ret = nvkm_falcon_ctor(sec2->func->flcn, &sec2->engine.subdev,
107 			       sec2->engine.subdev.name, addr, &sec2->falcon);
108 	if (ret)
109 		return ret;
110 
111 	if ((ret = nvkm_falcon_qmgr_new(&sec2->falcon, &sec2->qmgr)) ||
112 	    (ret = nvkm_falcon_cmdq_new(sec2->qmgr, "cmdq", &sec2->cmdq)) ||
113 	    (ret = nvkm_falcon_msgq_new(sec2->qmgr, "msgq", &sec2->msgq)))
114 		return ret;
115 
116 	INIT_WORK(&sec2->work, nvkm_sec2_recv);
117 	return 0;
118 };
119