Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * Copyright(c) 2018 Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * This file is provided under a dual BSD/GPLv2 license.  When using or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * redistributing this file, you may do so under either license.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * GPL LICENSE SUMMARY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * This program is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * it under the terms of version 2 of the GNU General Public License as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * This program is distributed in the hope that it will be useful, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * BSD LICENSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * modification, are permitted provided that the following conditions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * are met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  *  - Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  *    notice, this list of conditions and the following disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  *  - Redistributions in binary form must reproduce the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  *    notice, this list of conditions and the following disclaimer in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  *    the documentation and/or other materials provided with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  *    distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  *  - Neither the name of Intel Corporation nor the names of its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  *    contributors may be used to endorse or promote products derived
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  *    from this software without specific prior written permission.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) #include <linux/bitmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) #include "debugfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) #include "fault.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) #include "trace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #define HFI1_FAULT_DIR_TX   BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define HFI1_FAULT_DIR_RX   BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) #define HFI1_FAULT_DIR_TXRX (HFI1_FAULT_DIR_TX | HFI1_FAULT_DIR_RX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static void *_fault_stats_seq_start(struct seq_file *s, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	struct hfi1_opcode_stats_perctx *opstats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (*pos >= ARRAY_SIZE(opstats->stats))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static void *_fault_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct hfi1_opcode_stats_perctx *opstats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	++*pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	if (*pos >= ARRAY_SIZE(opstats->stats))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static void _fault_stats_seq_stop(struct seq_file *s, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) static int _fault_stats_seq_show(struct seq_file *s, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	loff_t *spos = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	loff_t i = *spos, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	u64 n_packets = 0, n_bytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	struct hfi1_devdata *dd = dd_from_dev(ibd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	struct hfi1_ctxtdata *rcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	for (j = 0; j < dd->first_dyn_alloc_ctxt; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		rcd = hfi1_rcd_get_by_index(dd, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		if (rcd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			n_packets += rcd->opstats->stats[i].n_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			n_bytes += rcd->opstats->stats[i].n_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		hfi1_rcd_put(rcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	for_each_possible_cpu(j) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		struct hfi1_opcode_stats_perctx *sp =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			per_cpu_ptr(dd->tx_opstats, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		n_packets += sp->stats[i].n_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		n_bytes += sp->stats[i].n_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	if (!n_packets && !n_bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		return SEQ_SKIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	if (!ibd->fault->n_rxfaults[i] && !ibd->fault->n_txfaults[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		return SEQ_SKIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	seq_printf(s, "%02llx %llu/%llu (faults rx:%llu faults: tx:%llu)\n", i,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		   (unsigned long long)n_packets,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		   (unsigned long long)n_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		   (unsigned long long)ibd->fault->n_rxfaults[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		   (unsigned long long)ibd->fault->n_txfaults[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) DEBUGFS_SEQ_FILE_OPS(fault_stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) DEBUGFS_SEQ_FILE_OPEN(fault_stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) DEBUGFS_FILE_OPS(fault_stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static int fault_opcodes_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	file->private_data = inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	return nonseekable_open(inode, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static ssize_t fault_opcodes_write(struct file *file, const char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 				   size_t len, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	ssize_t ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	/* 1280 = 256 opcodes * 4 chars/opcode + 255 commas + NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	size_t copy, datalen = 1280;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	char *data, *token, *ptr, *end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct fault *fault = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	data = kcalloc(datalen, sizeof(*data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	copy = min(len, datalen - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (copy_from_user(data, buf, copy)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		goto free_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	ret = debugfs_file_get(file->f_path.dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		goto free_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	ptr = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	token = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	for (ptr = data; *ptr; ptr = end + 1, token = ptr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		char *dash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		unsigned long range_start, range_end, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		bool remove = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		unsigned long bound = 1U << BITS_PER_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		end = strchr(ptr, ',');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		if (end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			*end = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		if (token[0] == '-') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			remove = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			token++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		dash = strchr(token, '-');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		if (dash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			*dash = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		if (kstrtoul(token, 0, &range_start))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		if (dash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			token = dash + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 			if (kstrtoul(token, 0, &range_end))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			range_end = range_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		if (range_start == range_end && range_start == -1UL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			bitmap_zero(fault->opcodes, sizeof(fault->opcodes) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 				    BITS_PER_BYTE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		/* Check the inputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		if (range_start >= bound || range_end >= bound)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		for (i = range_start; i <= range_end; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 			if (remove)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 				clear_bit(i, fault->opcodes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 				set_bit(i, fault->opcodes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if (!end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	ret = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	debugfs_file_put(file->f_path.dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) free_data:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	kfree(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static ssize_t fault_opcodes_read(struct file *file, char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 				  size_t len, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	ssize_t ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	size_t datalen = 1280, size = 0; /* see fault_opcodes_write() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	unsigned long bit = 0, zero = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	struct fault *fault = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	size_t bitsize = sizeof(fault->opcodes) * BITS_PER_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	data = kcalloc(datalen, sizeof(*data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	ret = debugfs_file_get(file->f_path.dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		goto free_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	bit = find_first_bit(fault->opcodes, bitsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	while (bit < bitsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		zero = find_next_zero_bit(fault->opcodes, bitsize, bit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		if (zero - 1 != bit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 			size += scnprintf(data + size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 					 datalen - size - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 					 "0x%lx-0x%lx,", bit, zero - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 			size += scnprintf(data + size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 					 datalen - size - 1, "0x%lx,",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 					 bit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		bit = find_next_bit(fault->opcodes, bitsize, zero);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	debugfs_file_put(file->f_path.dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	data[size - 1] = '\n';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	data[size] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	ret = simple_read_from_buffer(buf, len, pos, data, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) free_data:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	kfree(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static const struct file_operations __fault_opcodes_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	.owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	.open = fault_opcodes_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	.read = fault_opcodes_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	.write = fault_opcodes_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	.llseek = no_llseek
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) void hfi1_fault_exit_debugfs(struct hfi1_ibdev *ibd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	if (ibd->fault)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		debugfs_remove_recursive(ibd->fault->dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	kfree(ibd->fault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	ibd->fault = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) int hfi1_fault_init_debugfs(struct hfi1_ibdev *ibd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	struct dentry *parent = ibd->hfi1_ibdev_dbg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	struct dentry *fault_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	ibd->fault = kzalloc(sizeof(*ibd->fault), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	if (!ibd->fault)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	ibd->fault->attr.interval = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	ibd->fault->attr.require_end = ULONG_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	ibd->fault->attr.stacktrace_depth = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	ibd->fault->attr.dname = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	ibd->fault->attr.verbose = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	ibd->fault->enable = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	ibd->fault->opcode = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	ibd->fault->fault_skip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	ibd->fault->skip = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	ibd->fault->direction = HFI1_FAULT_DIR_TXRX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	ibd->fault->suppress_err = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	bitmap_zero(ibd->fault->opcodes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		    sizeof(ibd->fault->opcodes) * BITS_PER_BYTE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	fault_dir =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		fault_create_debugfs_attr("fault", parent, &ibd->fault->attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (IS_ERR(fault_dir)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		kfree(ibd->fault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		ibd->fault = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	ibd->fault->dir = fault_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	debugfs_create_file("fault_stats", 0444, fault_dir, ibd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 			    &_fault_stats_file_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	debugfs_create_bool("enable", 0600, fault_dir, &ibd->fault->enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	debugfs_create_bool("suppress_err", 0600, fault_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 			    &ibd->fault->suppress_err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	debugfs_create_bool("opcode_mode", 0600, fault_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			    &ibd->fault->opcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	debugfs_create_file("opcodes", 0600, fault_dir, ibd->fault,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 			    &__fault_opcodes_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	debugfs_create_u64("skip_pkts", 0600, fault_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 			   &ibd->fault->fault_skip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	debugfs_create_u64("skip_usec", 0600, fault_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			   &ibd->fault->fault_skip_usec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	debugfs_create_u8("direction", 0600, fault_dir, &ibd->fault->direction);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) bool hfi1_dbg_fault_suppress_err(struct hfi1_ibdev *ibd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	if (ibd->fault)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		return ibd->fault->suppress_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static bool __hfi1_should_fault(struct hfi1_ibdev *ibd, u32 opcode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 				u8 direction)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	bool ret = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	if (!ibd->fault || !ibd->fault->enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	if (!(ibd->fault->direction & direction))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	if (ibd->fault->opcode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		if (bitmap_empty(ibd->fault->opcodes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 				 (sizeof(ibd->fault->opcodes) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 				  BITS_PER_BYTE)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 			return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		if (!(test_bit(opcode, ibd->fault->opcodes)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 			return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	if (ibd->fault->fault_skip_usec &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	    time_before(jiffies, ibd->fault->skip_usec))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	if (ibd->fault->fault_skip && ibd->fault->skip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		ibd->fault->skip--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	ret = should_fail(&ibd->fault->attr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		ibd->fault->skip = ibd->fault->fault_skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		ibd->fault->skip_usec = jiffies +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 			usecs_to_jiffies(ibd->fault->fault_skip_usec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) bool hfi1_dbg_should_fault_tx(struct rvt_qp *qp, u32 opcode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	struct hfi1_ibdev *ibd = to_idev(qp->ibqp.device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	if (__hfi1_should_fault(ibd, opcode, HFI1_FAULT_DIR_TX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		trace_hfi1_fault_opcode(qp, opcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 		ibd->fault->n_txfaults[opcode]++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) bool hfi1_dbg_should_fault_rx(struct hfi1_packet *packet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	struct hfi1_ibdev *ibd = &packet->rcd->dd->verbs_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	if (__hfi1_should_fault(ibd, packet->opcode, HFI1_FAULT_DIR_RX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		trace_hfi1_fault_packet(packet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		ibd->fault->n_rxfaults[packet->opcode]++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }