1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/bitops.h>
 3#include <linux/seq_file.h>
 4#include <scsi/scsi_cmnd.h>
 5#include <scsi/scsi_dbg.h>
 6#include "scsi_debugfs.h"
 7
 8#define SCSI_CMD_FLAG_NAME(name)[const_ilog2(SCMD_##name)] = #name
 9static const char *const scsi_cmd_flags[] = {
10	SCSI_CMD_FLAG_NAME(TAGGED),
11	SCSI_CMD_FLAG_NAME(UNCHECKED_ISA_DMA),
12	SCSI_CMD_FLAG_NAME(INITIALIZED),
13};
14#undef SCSI_CMD_FLAG_NAME
15
16static int scsi_flags_show(struct seq_file *m, const unsigned long flags,
17			   const char *const *flag_name, int flag_name_count)
18{
19	bool sep = false;
20	int i;
21
22	for_each_set_bit(i, &flags, BITS_PER_LONG) {
23		if (sep)
24			seq_puts(m, "|");
25		sep = true;
26		if (i < flag_name_count && flag_name[i])
27			seq_puts(m, flag_name[i]);
28		else
29			seq_printf(m, "%d", i);
30	}
31	return 0;
32}
33
34void scsi_show_rq(struct seq_file *m, struct request *rq)
35{
36	struct scsi_cmnd *cmd = container_of(scsi_req(rq), typeof(*cmd), req);
37	int alloc_ms = jiffies_to_msecs(jiffies - cmd->jiffies_at_alloc);
38	int timeout_ms = jiffies_to_msecs(rq->timeout);
39	const u8 *const cdb = READ_ONCE(cmd->cmnd);
40	char buf[80] = "(?)";
41
42	if (cdb)
43		__scsi_format_command(buf, sizeof(buf), cdb, cmd->cmd_len);
44	seq_printf(m, ", .cmd=%s, .retries=%d, .result = %#x, .flags=", buf,
45		   cmd->retries, cmd->result);
46	scsi_flags_show(m, cmd->flags, scsi_cmd_flags,
47			ARRAY_SIZE(scsi_cmd_flags));
48	seq_printf(m, ", .timeout=%d.%03d, allocated %d.%03d s ago",
49		   timeout_ms / 1000, timeout_ms % 1000,
50		   alloc_ms / 1000, alloc_ms % 1000);
51}