1 /*
2 * Copyright 2014 Advanced Micro Devices, 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 */
23 #include <linux/types.h>
24 #include <linux/kernel.h>
25 #include <linux/log2.h>
26 #include <linux/sched.h>
27 #include <linux/slab.h>
28 #include <linux/device.h>
29
30 #include "kfd_priv.h"
31 #include "cik_regs.h"
32 #include "kfd_pm4_headers.h"
33 #include "kfd_pm4_headers_diq.h"
34 #include "kfd_dbgmgr.h"
35 #include "kfd_dbgdev.h"
36
37 static DEFINE_MUTEX(kfd_dbgmgr_mutex);
38
kfd_get_dbgmgr_mutex(void)39 struct mutex *kfd_get_dbgmgr_mutex(void)
40 {
41 return &kfd_dbgmgr_mutex;
42 }
43
44
kfd_dbgmgr_uninitialize(struct kfd_dbgmgr * pmgr)45 static void kfd_dbgmgr_uninitialize(struct kfd_dbgmgr *pmgr)
46 {
47 BUG_ON(!pmgr);
48
49 kfree(pmgr->dbgdev);
50
51 pmgr->dbgdev = NULL;
52 pmgr->pasid = 0;
53 pmgr->dev = NULL;
54 }
55
kfd_dbgmgr_destroy(struct kfd_dbgmgr * pmgr)56 void kfd_dbgmgr_destroy(struct kfd_dbgmgr *pmgr)
57 {
58 if (pmgr != NULL) {
59 kfd_dbgmgr_uninitialize(pmgr);
60 kfree(pmgr);
61 }
62 }
63
kfd_dbgmgr_create(struct kfd_dbgmgr ** ppmgr,struct kfd_dev * pdev)64 bool kfd_dbgmgr_create(struct kfd_dbgmgr **ppmgr, struct kfd_dev *pdev)
65 {
66 enum DBGDEV_TYPE type = DBGDEV_TYPE_DIQ;
67 struct kfd_dbgmgr *new_buff;
68
69 BUG_ON(pdev == NULL);
70 BUG_ON(!pdev->init_complete);
71
72 new_buff = kfd_alloc_struct(new_buff);
73 if (!new_buff) {
74 pr_err("amdkfd: Failed to allocate dbgmgr instance\n");
75 return false;
76 }
77
78 new_buff->pasid = 0;
79 new_buff->dev = pdev;
80 new_buff->dbgdev = kfd_alloc_struct(new_buff->dbgdev);
81 if (!new_buff->dbgdev) {
82 pr_err("amdkfd: Failed to allocate dbgdev instance\n");
83 kfree(new_buff);
84 return false;
85 }
86
87 /* get actual type of DBGDevice cpsch or not */
88 if (sched_policy == KFD_SCHED_POLICY_NO_HWS)
89 type = DBGDEV_TYPE_NODIQ;
90
91 kfd_dbgdev_init(new_buff->dbgdev, pdev, type);
92 *ppmgr = new_buff;
93
94 return true;
95 }
96
kfd_dbgmgr_register(struct kfd_dbgmgr * pmgr,struct kfd_process * p)97 long kfd_dbgmgr_register(struct kfd_dbgmgr *pmgr, struct kfd_process *p)
98 {
99 BUG_ON(!p || !pmgr || !pmgr->dbgdev);
100
101 if (pmgr->pasid != 0) {
102 pr_debug("H/W debugger is already active using pasid %d\n",
103 pmgr->pasid);
104 return -EBUSY;
105 }
106
107 /* remember pasid */
108 pmgr->pasid = p->pasid;
109
110 /* provide the pqm for diq generation */
111 pmgr->dbgdev->pqm = &p->pqm;
112
113 /* activate the actual registering */
114 pmgr->dbgdev->dbgdev_register(pmgr->dbgdev);
115
116 return 0;
117 }
118
kfd_dbgmgr_unregister(struct kfd_dbgmgr * pmgr,struct kfd_process * p)119 long kfd_dbgmgr_unregister(struct kfd_dbgmgr *pmgr, struct kfd_process *p)
120 {
121 BUG_ON(!p || !pmgr || !pmgr->dbgdev);
122
123 /* Is the requests coming from the already registered process? */
124 if (pmgr->pasid != p->pasid) {
125 pr_debug("H/W debugger is not registered by calling pasid %d\n",
126 p->pasid);
127 return -EINVAL;
128 }
129
130 pmgr->dbgdev->dbgdev_unregister(pmgr->dbgdev);
131
132 pmgr->pasid = 0;
133
134 return 0;
135 }
136
kfd_dbgmgr_wave_control(struct kfd_dbgmgr * pmgr,struct dbg_wave_control_info * wac_info)137 long kfd_dbgmgr_wave_control(struct kfd_dbgmgr *pmgr,
138 struct dbg_wave_control_info *wac_info)
139 {
140 BUG_ON(!pmgr || !pmgr->dbgdev || !wac_info);
141
142 /* Is the requests coming from the already registered process? */
143 if (pmgr->pasid != wac_info->process->pasid) {
144 pr_debug("H/W debugger support was not registered for requester pasid %d\n",
145 wac_info->process->pasid);
146 return -EINVAL;
147 }
148
149 return (long) pmgr->dbgdev->dbgdev_wave_control(pmgr->dbgdev, wac_info);
150 }
151
kfd_dbgmgr_address_watch(struct kfd_dbgmgr * pmgr,struct dbg_address_watch_info * adw_info)152 long kfd_dbgmgr_address_watch(struct kfd_dbgmgr *pmgr,
153 struct dbg_address_watch_info *adw_info)
154 {
155 BUG_ON(!pmgr || !pmgr->dbgdev || !adw_info);
156
157
158 /* Is the requests coming from the already registered process? */
159 if (pmgr->pasid != adw_info->process->pasid) {
160 pr_debug("H/W debugger support was not registered for requester pasid %d\n",
161 adw_info->process->pasid);
162 return -EINVAL;
163 }
164
165 return (long) pmgr->dbgdev->dbgdev_address_watch(pmgr->dbgdev,
166 adw_info);
167 }
168
169