1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/seq_file.h>
 3#include <scsi/scsi_cmnd.h>
 4#include <scsi/scsi_dbg.h>
 5#include "scsi_debugfs.h"
 6
 7#define SCSI_CMD_FLAG_NAME(name) [ilog2(SCMD_##name)] = #name
 8static const char *const scsi_cmd_flags[] = {
 9	SCSI_CMD_FLAG_NAME(TAGGED),
10	SCSI_CMD_FLAG_NAME(UNCHECKED_ISA_DMA),
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 (i = 0; i < sizeof(flags) * BITS_PER_BYTE; i++) {
22		if (!(flags & BIT(i)))
23			continue;
24		if (sep)
25			seq_puts(m, "|");
26		sep = true;
27		if (i < flag_name_count && flag_name[i])
28			seq_puts(m, flag_name[i]);
29		else
30			seq_printf(m, "%d", i);
31	}
32	return 0;
33}
34
35void scsi_show_rq(struct seq_file *m, struct request *rq)
36{
37	struct scsi_cmnd *cmd = container_of(scsi_req(rq), typeof(*cmd), req);
38	int alloc_ms = jiffies_to_msecs(jiffies - cmd->jiffies_at_alloc);
39	int timeout_ms = jiffies_to_msecs(rq->timeout);
40	const u8 *const cdb = READ_ONCE(cmd->cmnd);
41	char buf[80] = "(?)";
42
43	if (cdb)
44		__scsi_format_command(buf, sizeof(buf), cdb, cmd->cmd_len);
45	seq_printf(m, ", .cmd=%s, .retries=%d, .result = %#x, .flags=", buf,
46		   cmd->retries, cmd->result);
47	scsi_flags_show(m, cmd->flags, scsi_cmd_flags,
48			ARRAY_SIZE(scsi_cmd_flags));
49	seq_printf(m, ", .timeout=%d.%03d, allocated %d.%03d s ago",
50		   timeout_ms / 1000, timeout_ms % 1000,
51		   alloc_ms / 1000, alloc_ms % 1000);
52}