1 /* $NetBSD: amdgpu_dc_dmub_srv.c,v 1.2 2021/12/18 23:45:00 riastradh Exp $ */
2
3 /*
4 * Copyright 2019 Advanced Micro Devices, 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: AMD
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: amdgpu_dc_dmub_srv.c,v 1.2 2021/12/18 23:45:00 riastradh Exp $");
30
31 #include "dc.h"
32 #include "dc_dmub_srv.h"
33 #include "../dmub/inc/dmub_srv.h"
34
dc_dmub_srv_construct(struct dc_dmub_srv * dc_srv,struct dc * dc,struct dmub_srv * dmub)35 static void dc_dmub_srv_construct(struct dc_dmub_srv *dc_srv, struct dc *dc,
36 struct dmub_srv *dmub)
37 {
38 dc_srv->dmub = dmub;
39 dc_srv->ctx = dc->ctx;
40 }
41
dc_dmub_srv_create(struct dc * dc,struct dmub_srv * dmub)42 struct dc_dmub_srv *dc_dmub_srv_create(struct dc *dc, struct dmub_srv *dmub)
43 {
44 struct dc_dmub_srv *dc_srv =
45 kzalloc(sizeof(struct dc_dmub_srv), GFP_KERNEL);
46
47 if (dc_srv == NULL) {
48 BREAK_TO_DEBUGGER();
49 return NULL;
50 }
51
52 dc_dmub_srv_construct(dc_srv, dc, dmub);
53
54 return dc_srv;
55 }
56
dc_dmub_srv_destroy(struct dc_dmub_srv ** dmub_srv)57 void dc_dmub_srv_destroy(struct dc_dmub_srv **dmub_srv)
58 {
59 if (*dmub_srv) {
60 kfree(*dmub_srv);
61 *dmub_srv = NULL;
62 }
63 }
64
dc_dmub_srv_cmd_queue(struct dc_dmub_srv * dc_dmub_srv,struct dmub_cmd_header * cmd)65 void dc_dmub_srv_cmd_queue(struct dc_dmub_srv *dc_dmub_srv,
66 struct dmub_cmd_header *cmd)
67 {
68 struct dmub_srv *dmub = dc_dmub_srv->dmub;
69 struct dc_context *dc_ctx = dc_dmub_srv->ctx;
70 enum dmub_status status;
71
72 status = dmub_srv_cmd_queue(dmub, cmd);
73 if (status == DMUB_STATUS_OK)
74 return;
75
76 if (status != DMUB_STATUS_QUEUE_FULL)
77 goto error;
78
79 /* Execute and wait for queue to become empty again. */
80 dc_dmub_srv_cmd_execute(dc_dmub_srv);
81 dc_dmub_srv_wait_idle(dc_dmub_srv);
82
83 /* Requeue the command. */
84 status = dmub_srv_cmd_queue(dmub, cmd);
85 if (status == DMUB_STATUS_OK)
86 return;
87
88 error:
89 DC_ERROR("Error queuing DMUB command: status=%d\n", status);
90 }
91
dc_dmub_srv_cmd_execute(struct dc_dmub_srv * dc_dmub_srv)92 void dc_dmub_srv_cmd_execute(struct dc_dmub_srv *dc_dmub_srv)
93 {
94 struct dmub_srv *dmub = dc_dmub_srv->dmub;
95 struct dc_context *dc_ctx = dc_dmub_srv->ctx;
96 enum dmub_status status;
97
98 status = dmub_srv_cmd_execute(dmub);
99 if (status != DMUB_STATUS_OK)
100 DC_ERROR("Error starting DMUB execution: status=%d\n", status);
101 }
102
dc_dmub_srv_wait_idle(struct dc_dmub_srv * dc_dmub_srv)103 void dc_dmub_srv_wait_idle(struct dc_dmub_srv *dc_dmub_srv)
104 {
105 struct dmub_srv *dmub = dc_dmub_srv->dmub;
106 struct dc_context *dc_ctx = dc_dmub_srv->ctx;
107 enum dmub_status status;
108
109 status = dmub_srv_wait_for_idle(dmub, 100000);
110 if (status != DMUB_STATUS_OK)
111 DC_ERROR("Error waiting for DMUB idle: status=%d\n", status);
112 }
113
dc_dmub_srv_wait_phy_init(struct dc_dmub_srv * dc_dmub_srv)114 void dc_dmub_srv_wait_phy_init(struct dc_dmub_srv *dc_dmub_srv)
115 {
116 struct dmub_srv *dmub = dc_dmub_srv->dmub;
117 struct dc_context *dc_ctx = dc_dmub_srv->ctx;
118 enum dmub_status status;
119
120 for (;;) {
121 /* Wait up to a second for PHY init. */
122 status = dmub_srv_wait_for_phy_init(dmub, 1000000);
123 if (status == DMUB_STATUS_OK)
124 /* Initialization OK */
125 break;
126
127 DC_ERROR("DMCUB PHY init failed: status=%d\n", status);
128 ASSERT(0);
129
130 if (status != DMUB_STATUS_TIMEOUT)
131 /*
132 * Server likely initialized or we don't have
133 * DMCUB HW support - this won't end.
134 */
135 break;
136
137 /* Continue spinning so we don't hang the ASIC. */
138 }
139 }
140