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fbeb661b YS |
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 | ||
39 | struct mutex *kfd_get_dbgmgr_mutex(void) | |
40 | { | |
41 | return &kfd_dbgmgr_mutex; | |
42 | } | |
43 | ||
44 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | } | |
788bf83d YS |
136 | |
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 | ||
e2e9afc4 YS |
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 |