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