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