1184610Salfred/* $NetBSD: kfd_dbgmgr.c,v 1.3 2021/12/18 23:44:59 riastradh Exp $ */ 2184610Salfred 3184610Salfred/* 4184610Salfred * Copyright 2014 Advanced Micro Devices, Inc. 5184610Salfred * 6184610Salfred * Permission is hereby granted, free of charge, to any person obtaining a 7184610Salfred * copy of this software and associated documentation files (the "Software"), 8184610Salfred * to deal in the Software without restriction, including without limitation 9184610Salfred * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10184610Salfred * and/or sell copies of the Software, and to permit persons to whom the 11184610Salfred * Software is furnished to do so, subject to the following conditions: 12184610Salfred * 13184610Salfred * The above copyright notice and this permission notice shall be included in 14184610Salfred * all copies or substantial portions of the Software. 15184610Salfred * 16184610Salfred * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17184610Salfred * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18184610Salfred * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19184610Salfred * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20184610Salfred * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21184610Salfred * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22184610Salfred * OTHER DEALINGS IN THE SOFTWARE. 23184610Salfred * 24184610Salfred */ 25184610Salfred#include <sys/cdefs.h> 26184610Salfred__KERNEL_RCSID(0, "$NetBSD: kfd_dbgmgr.c,v 1.3 2021/12/18 23:44:59 riastradh Exp $"); 27184610Salfred 28184610Salfred#include <linux/types.h> 29184610Salfred#include <linux/kernel.h> 30184610Salfred#include <linux/log2.h> 31184610Salfred#include <linux/sched.h> 32184610Salfred#include <linux/slab.h> 33184610Salfred#include <linux/device.h> 34184610Salfred 35184610Salfred#include "kfd_priv.h" 36184610Salfred#include "cik_regs.h" 37184610Salfred#include "kfd_pm4_headers.h" 38184610Salfred#include "kfd_pm4_headers_diq.h" 39184610Salfred#include "kfd_dbgmgr.h" 40194677Sthompsa#include "kfd_dbgdev.h" 41194677Sthompsa#include "kfd_device_queue_manager.h" 42194677Sthompsa 43194677Sthompsastatic DEFINE_MUTEX(kfd_dbgmgr_mutex); 44194677Sthompsa 45194677Sthompsastruct mutex *kfd_get_dbgmgr_mutex(void) 46194677Sthompsa{ 47194677Sthompsa return &kfd_dbgmgr_mutex; 48194677Sthompsa} 49194677Sthompsa 50194677Sthompsa 51194677Sthompsastatic void kfd_dbgmgr_uninitialize(struct kfd_dbgmgr *pmgr) 52194677Sthompsa{ 53194677Sthompsa kfree(pmgr->dbgdev); 54194677Sthompsa 55194677Sthompsa pmgr->dbgdev = NULL; 56194677Sthompsa pmgr->pasid = 0; 57194677Sthompsa pmgr->dev = NULL; 58194677Sthompsa} 59194677Sthompsa 60194677Sthompsavoid kfd_dbgmgr_destroy(struct kfd_dbgmgr *pmgr) 61194677Sthompsa{ 62194677Sthompsa if (pmgr) { 63188746Sthompsa kfd_dbgmgr_uninitialize(pmgr); 64184610Salfred kfree(pmgr); 65184610Salfred } 66188942Sthompsa} 67188942Sthompsa 68184610Salfredbool kfd_dbgmgr_create(struct kfd_dbgmgr **ppmgr, struct kfd_dev *pdev) 69188942Sthompsa{ 70184610Salfred enum DBGDEV_TYPE type = DBGDEV_TYPE_DIQ; 71207077Sthompsa struct kfd_dbgmgr *new_buff; 72184610Salfred 73184610Salfred if (WARN_ON(!pdev->init_complete)) 74192502Sthompsa return false; 75192502Sthompsa 76184610Salfred new_buff = kfd_alloc_struct(new_buff); 77184610Salfred if (!new_buff) { 78184610Salfred pr_err("Failed to allocate dbgmgr instance\n"); 79184610Salfred return false; 80184610Salfred } 81184610Salfred 82184610Salfred new_buff->pasid = 0; 83184610Salfred new_buff->dev = pdev; 84184610Salfred new_buff->dbgdev = kfd_alloc_struct(new_buff->dbgdev); 85184610Salfred if (!new_buff->dbgdev) { 86184610Salfred pr_err("Failed to allocate dbgdev instance\n"); 87184610Salfred kfree(new_buff); 88184610Salfred return false; 89184610Salfred } 90184610Salfred 91184610Salfred /* get actual type of DBGDevice cpsch or not */ 92184610Salfred if (pdev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) 93184610Salfred type = DBGDEV_TYPE_NODIQ; 94184610Salfred 95184610Salfred kfd_dbgdev_init(new_buff->dbgdev, pdev, type); 96184610Salfred *ppmgr = new_buff; 97184610Salfred 98184610Salfred return true; 99184610Salfred} 100184610Salfred 101184610Salfredlong kfd_dbgmgr_register(struct kfd_dbgmgr *pmgr, struct kfd_process *p) 102184610Salfred{ 103184610Salfred if (pmgr->pasid != 0) { 104184610Salfred pr_debug("H/W debugger is already active using pasid 0x%x\n", 105184610Salfred pmgr->pasid); 106184610Salfred return -EBUSY; 107184610Salfred } 108184610Salfred 109184610Salfred /* remember pasid */ 110184610Salfred pmgr->pasid = p->pasid; 111184610Salfred 112184610Salfred /* provide the pqm for diq generation */ 113184610Salfred pmgr->dbgdev->pqm = &p->pqm; 114184610Salfred 115184610Salfred /* activate the actual registering */ 116184610Salfred pmgr->dbgdev->dbgdev_register(pmgr->dbgdev); 117184610Salfred 118184610Salfred return 0; 119184610Salfred} 120184610Salfred 121184610Salfredlong kfd_dbgmgr_unregister(struct kfd_dbgmgr *pmgr, struct kfd_process *p) 122184610Salfred{ 123184610Salfred /* Is the requests coming from the already registered process? */ 124184610Salfred if (pmgr->pasid != p->pasid) { 125184610Salfred pr_debug("H/W debugger is not registered by calling pasid 0x%x\n", 126184610Salfred p->pasid); 127184610Salfred return -EINVAL; 128184610Salfred } 129184610Salfred 130184610Salfred pmgr->dbgdev->dbgdev_unregister(pmgr->dbgdev); 131184610Salfred 132184610Salfred pmgr->pasid = 0; 133184610Salfred 134184610Salfred return 0; 135184610Salfred} 136184610Salfred 137184610Salfredlong kfd_dbgmgr_wave_control(struct kfd_dbgmgr *pmgr, 138187259Sthompsa struct dbg_wave_control_info *wac_info) 139187259Sthompsa{ 140187259Sthompsa /* Is the requests coming from the already registered process? */ 141187259Sthompsa if (pmgr->pasid != wac_info->process->pasid) { 142188413Sthompsa pr_debug("H/W debugger support was not registered for requester pasid 0x%x\n", 143187259Sthompsa wac_info->process->pasid); 144184610Salfred return -EINVAL; 145184610Salfred } 146192984Sthompsa 147192984Sthompsa return (long) pmgr->dbgdev->dbgdev_wave_control(pmgr->dbgdev, wac_info); 148184610Salfred} 149192984Sthompsa 150192984Sthompsalong kfd_dbgmgr_address_watch(struct kfd_dbgmgr *pmgr, 151189265Sthompsa struct dbg_address_watch_info *adw_info) 152184610Salfred{ 153184610Salfred /* Is the requests coming from the already registered process? */ 154184610Salfred if (pmgr->pasid != adw_info->process->pasid) { 155184610Salfred pr_debug("H/W debugger support was not registered for requester pasid 0x%x\n", 156184610Salfred adw_info->process->pasid); 157184610Salfred return -EINVAL; 158184610Salfred } 159184610Salfred 160184610Salfred return (long) pmgr->dbgdev->dbgdev_address_watch(pmgr->dbgdev, 161184610Salfred adw_info); 162184610Salfred} 163184610Salfred 164184610Salfred