drivers/gpu/drm/amd/amdkfd/kfd_dbgmgr.c

   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
  40 struct mutex *kfd_get_dbgmgr_mutex(void)
  41 {
  42         return &kfd_dbgmgr_mutex;
  43 }
  44
  45
  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
  55 void kfd_dbgmgr_destroy(struct kfd_dbgmgr *pmgr)
  56 {
  57         if (pmgr) {
  58                 kfd_dbgmgr_uninitialize(pmgr);
  59                 kfree(pmgr);
  60         }
  61 }
  62
  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
  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 %d\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
 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 %d\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
 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 %d\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
 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 %d\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