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