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
9 static 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
scsi_flags_show(struct seq_file * m,const unsigned long flags,const char * const * flag_name,int flag_name_count)16 static 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
scsi_show_rq(struct seq_file * m,struct request * rq)34 void 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 }
52
