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         kfree(pmgr->dbgdev);
  48
  49         pmgr->dbgdev = NULL;
  50         pmgr->pasid = 0;
  51         pmgr->dev = NULL;
  52 }
  53
  54 void kfd_dbgmgr_destroy(struct kfd_dbgmgr *pmgr)
  55 {
  56         if (pmgr) {
  57                 kfd_dbgmgr_uninitialize(pmgr);
  58                 kfree(pmgr);
  59         }
  60 }
  61
  62 bool kfd_dbgmgr_create(struct kfd_dbgmgr **ppmgr, struct kfd_dev *pdev)
  63 {
  64         enum DBGDEV_TYPE type = DBGDEV_TYPE_DIQ;
  65         struct kfd_dbgmgr *new_buff;
  66
  67         if (WARN_ON(!pdev->init_complete))
  68                 return false;
  69
  70         new_buff = kfd_alloc_struct(new_buff);
  71         if (!new_buff) {
  72                 pr_err("Failed to allocate dbgmgr instance\n");
  73                 return false;
  74         }
  75
  76         new_buff->pasid = 0;
  77         new_buff->dev = pdev;
  78         new_buff->dbgdev = kfd_alloc_struct(new_buff->dbgdev);
  79         if (!new_buff->dbgdev) {
  80                 pr_err("Failed to allocate dbgdev instance\n");
  81                 kfree(new_buff);
  82                 return false;
  83         }
  84
  85         /* get actual type of DBGDevice cpsch or not */
  86         if (sched_policy == KFD_SCHED_POLICY_NO_HWS)
  87                 type = DBGDEV_TYPE_NODIQ;
  88
  89         kfd_dbgdev_init(new_buff->dbgdev, pdev, type);
  90         *ppmgr = new_buff;
  91
  92         return true;
  93 }
  94
  95 long kfd_dbgmgr_register(struct kfd_dbgmgr *pmgr, struct kfd_process *p)
  96 {
  97         if (pmgr->pasid != 0) {
  98                 pr_debug("H/W debugger is already active using pasid %d\n",
  99                                 pmgr->pasid);
 100                 return -EBUSY;
 101         }
 102
 103         /* remember pasid */
 104         pmgr->pasid = p->pasid;
 105
 106         /* provide the pqm for diq generation */
 107         pmgr->dbgdev->pqm = &p->pqm;
 108
 109         /* activate the actual registering */
 110         pmgr->dbgdev->dbgdev_register(pmgr->dbgdev);
 111
 112         return 0;
 113 }
 114
 115 long kfd_dbgmgr_unregister(struct kfd_dbgmgr *pmgr, struct kfd_process *p)
 116 {
 117         /* Is the requests coming from the already registered process? */
 118         if (pmgr->pasid != p->pasid) {
 119                 pr_debug("H/W debugger is not registered by calling pasid %d\n",
 120                                 p->pasid);
 121                 return -EINVAL;
 122         }
 123
 124         pmgr->dbgdev->dbgdev_unregister(pmgr->dbgdev);
 125
 126         pmgr->pasid = 0;
 127
 128         return 0;
 129 }
 130
 131 long kfd_dbgmgr_wave_control(struct kfd_dbgmgr *pmgr,
 132                                 struct dbg_wave_control_info *wac_info)
 133 {
 134         /* Is the requests coming from the already registered process? */
 135         if (pmgr->pasid != wac_info->process->pasid) {
 136                 pr_debug("H/W debugger support was not registered for requester pasid %d\n",
 137                                 wac_info->process->pasid);
 138                 return -EINVAL;
 139         }
 140
 141         return (long) pmgr->dbgdev->dbgdev_wave_control(pmgr->dbgdev, wac_info);
 142 }
 143
 144 long kfd_dbgmgr_address_watch(struct kfd_dbgmgr *pmgr,
 145                                 struct dbg_address_watch_info *adw_info)
 146 {
 147         /* Is the requests coming from the already registered process? */
 148         if (pmgr->pasid != adw_info->process->pasid) {
 149                 pr_debug("H/W debugger support was not registered for requester pasid %d\n",
 150                                 adw_info->process->pasid);
 151                 return -EINVAL;
 152         }
 153
 154         return (long) pmgr->dbgdev->dbgdev_address_watch(pmgr->dbgdev,
 155                                                         adw_info);
 156 }
 157