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 8 static 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 15 static 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 35 void 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 } 53