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kfd_dbgmgr.c revision 1.2.6.2 
      1 /*	$NetBSD: kfd_dbgmgr.c,v 1.2.6.2 2019/06/10 22:07:58 christos Exp $	*/
      2 
      3 /*
      4  * Copyright 2014 Advanced Micro Devices, Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  */
     25 #include <sys/cdefs.h>
     26 __KERNEL_RCSID(0, "$NetBSD: kfd_dbgmgr.c,v 1.2.6.2 2019/06/10 22:07:58 christos Exp $");
     27 
     28 #include <linux/types.h>
     29 #include <linux/kernel.h>
     30 #include <linux/log2.h>
     31 #include <linux/sched.h>
     32 #include <linux/slab.h>
     33 #include <linux/device.h>
     34 
     35 #include "kfd_priv.h"
     36 #include "cik_regs.h"
     37 #include "kfd_pm4_headers.h"
     38 #include "kfd_pm4_headers_diq.h"
     39 #include "kfd_dbgmgr.h"
     40 #include "kfd_dbgdev.h"
     41 
     42 static DEFINE_MUTEX(kfd_dbgmgr_mutex);
     43 
     44 struct mutex *kfd_get_dbgmgr_mutex(void)
     45 {
     46 	return &kfd_dbgmgr_mutex;
     47 }
     48 
     49 
     50 static void kfd_dbgmgr_uninitialize(struct kfd_dbgmgr *pmgr)
     51 {
     52 	BUG_ON(!pmgr);
     53 
     54 	kfree(pmgr->dbgdev);
     55 
     56 	pmgr->dbgdev = NULL;
     57 	pmgr->pasid = 0;
     58 	pmgr->dev = NULL;
     59 }
     60 
     61 void kfd_dbgmgr_destroy(struct kfd_dbgmgr *pmgr)
     62 {
     63 	if (pmgr != NULL) {
     64 		kfd_dbgmgr_uninitialize(pmgr);
     65 		kfree(pmgr);
     66 	}
     67 }
     68 
     69 bool kfd_dbgmgr_create(struct kfd_dbgmgr **ppmgr, struct kfd_dev *pdev)
     70 {
     71 	enum DBGDEV_TYPE type = DBGDEV_TYPE_DIQ;
     72 	struct kfd_dbgmgr *new_buff;
     73 
     74 	BUG_ON(pdev == NULL);
     75 	BUG_ON(!pdev->init_complete);
     76 
     77 	new_buff = kfd_alloc_struct(new_buff);
     78 	if (!new_buff) {
     79 		pr_err("amdkfd: Failed to allocate dbgmgr instance\n");
     80 		return false;
     81 	}
     82 
     83 	new_buff->pasid = 0;
     84 	new_buff->dev = pdev;
     85 	new_buff->dbgdev = kfd_alloc_struct(new_buff->dbgdev);
     86 	if (!new_buff->dbgdev) {
     87 		pr_err("amdkfd: Failed to allocate dbgdev instance\n");
     88 		kfree(new_buff);
     89 		return false;
     90 	}
     91 
     92 	/* get actual type of DBGDevice cpsch or not */
     93 	if (sched_policy == KFD_SCHED_POLICY_NO_HWS)
     94 		type = DBGDEV_TYPE_NODIQ;
     95 
     96 	kfd_dbgdev_init(new_buff->dbgdev, pdev, type);
     97 	*ppmgr = new_buff;
     98 
     99 	return true;
    100 }
    101 
    102 long kfd_dbgmgr_register(struct kfd_dbgmgr *pmgr, struct kfd_process *p)
    103 {
    104 	BUG_ON(!p || !pmgr || !pmgr->dbgdev);
    105 
    106 	if (pmgr->pasid != 0) {
    107 		pr_debug("H/W debugger is already active using pasid %d\n",
    108 				pmgr->pasid);
    109 		return -EBUSY;
    110 	}
    111 
    112 	/* remember pasid */
    113 	pmgr->pasid = p->pasid;
    114 
    115 	/* provide the pqm for diq generation */
    116 	pmgr->dbgdev->pqm = &p->pqm;
    117 
    118 	/* activate the actual registering */
    119 	pmgr->dbgdev->dbgdev_register(pmgr->dbgdev);
    120 
    121 	return 0;
    122 }
    123 
    124 long kfd_dbgmgr_unregister(struct kfd_dbgmgr *pmgr, struct kfd_process *p)
    125 {
    126 	BUG_ON(!p || !pmgr || !pmgr->dbgdev);
    127 
    128 	/* Is the requests coming from the already registered process? */
    129 	if (pmgr->pasid != p->pasid) {
    130 		pr_debug("H/W debugger is not registered by calling pasid %d\n",
    131 				p->pasid);
    132 		return -EINVAL;
    133 	}
    134 
    135 	pmgr->dbgdev->dbgdev_unregister(pmgr->dbgdev);
    136 
    137 	pmgr->pasid = 0;
    138 
    139 	return 0;
    140 }
    141 
    142 long kfd_dbgmgr_wave_control(struct kfd_dbgmgr *pmgr,
    143 				struct dbg_wave_control_info *wac_info)
    144 {
    145 	BUG_ON(!pmgr || !pmgr->dbgdev || !wac_info);
    146 
    147 	/* Is the requests coming from the already registered process? */
    148 	if (pmgr->pasid != wac_info->process->pasid) {
    149 		pr_debug("H/W debugger support was not registered for requester pasid %d\n",
    150 				wac_info->process->pasid);
    151 		return -EINVAL;
    152 	}
    153 
    154 	return (long) pmgr->dbgdev->dbgdev_wave_control(pmgr->dbgdev, wac_info);
    155 }
    156 
    157 long kfd_dbgmgr_address_watch(struct kfd_dbgmgr *pmgr,
    158 				struct dbg_address_watch_info *adw_info)
    159 {
    160 	BUG_ON(!pmgr || !pmgr->dbgdev || !adw_info);
    161 
    162 
    163 	/* Is the requests coming from the already registered process? */
    164 	if (pmgr->pasid != adw_info->process->pasid) {
    165 		pr_debug("H/W debugger support was not registered for requester pasid %d\n",
    166 				adw_info->process->pasid);
    167 		return -EINVAL;
    168 	}
    169 
    170 	return (long) pmgr->dbgdev->dbgdev_address_watch(pmgr->dbgdev,
    171 							adw_info);
    172 }
    173 
    174