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
37static DEFINE_MUTEX(kfd_dbgmgr_mutex);
38
39struct mutex *kfd_get_dbgmgr_mutex(void)
40{
41	return &kfd_dbgmgr_mutex;
42}
43
44
45static 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
56void kfd_dbgmgr_destroy(struct kfd_dbgmgr *pmgr)
57{
58	if (pmgr != NULL) {
59		kfd_dbgmgr_uninitialize(pmgr);
60		kfree(pmgr);
61	}
62}
63
64bool 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
97long 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
119long 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
137long 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
152long 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