kernel/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
  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 }
 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
 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