drivers/nvme/host/trace.c

   1 /*
   2  * NVM Express device driver tracepoints
   3  * Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14
  15 #include <asm/unaligned.h>
  16 #include "trace.h"
  17
  18 static const char *nvme_trace_create_sq(struct trace_seq *p, u8 *cdw10)
  19 {
  20         const char *ret = trace_seq_buffer_ptr(p);
  21         u16 sqid = get_unaligned_le16(cdw10);
  22         u16 qsize = get_unaligned_le16(cdw10 + 2);
  23         u16 sq_flags = get_unaligned_le16(cdw10 + 4);
  24         u16 cqid = get_unaligned_le16(cdw10 + 6);
  25
  26
  27         trace_seq_printf(p, "sqid=%u, qsize=%u, sq_flags=0x%x, cqid=%u",
  28                          sqid, qsize, sq_flags, cqid);
  29         trace_seq_putc(p, 0);
  30
  31         return ret;
  32 }
  33
  34 static const char *nvme_trace_create_cq(struct trace_seq *p, u8 *cdw10)
  35 {
  36         const char *ret = trace_seq_buffer_ptr(p);
  37         u16 cqid = get_unaligned_le16(cdw10);
  38         u16 qsize = get_unaligned_le16(cdw10 + 2);
  39         u16 cq_flags = get_unaligned_le16(cdw10 + 4);
  40         u16 irq_vector = get_unaligned_le16(cdw10 + 6);
  41
  42         trace_seq_printf(p, "cqid=%u, qsize=%u, cq_flags=0x%x, irq_vector=%u",
  43                          cqid, qsize, cq_flags, irq_vector);
  44         trace_seq_putc(p, 0);
  45
  46         return ret;
  47 }
  48
  49 static const char *nvme_trace_admin_identify(struct trace_seq *p, u8 *cdw10)
  50 {
  51         const char *ret = trace_seq_buffer_ptr(p);
  52         u8 cns = cdw10[0];
  53         u16 ctrlid = get_unaligned_le16(cdw10 + 2);
  54
  55         trace_seq_printf(p, "cns=%u, ctrlid=%u", cns, ctrlid);
  56         trace_seq_putc(p, 0);
  57
  58         return ret;
  59 }
  60
  61
  62
  63 static const char *nvme_trace_read_write(struct trace_seq *p, u8 *cdw10)
  64 {
  65         const char *ret = trace_seq_buffer_ptr(p);
  66         u64 slba = get_unaligned_le64(cdw10);
  67         u16 length = get_unaligned_le16(cdw10 + 8);
  68         u16 control = get_unaligned_le16(cdw10 + 10);
  69         u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
  70         u32 reftag = get_unaligned_le32(cdw10 +  16);
  71
  72         trace_seq_printf(p,
  73                          "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
  74                          slba, length, control, dsmgmt, reftag);
  75         trace_seq_putc(p, 0);
  76
  77         return ret;
  78 }
  79
  80 static const char *nvme_trace_dsm(struct trace_seq *p, u8 *cdw10)
  81 {
  82         const char *ret = trace_seq_buffer_ptr(p);
  83
  84         trace_seq_printf(p, "nr=%u, attributes=%u",
  85                          get_unaligned_le32(cdw10),
  86                          get_unaligned_le32(cdw10 + 4));
  87         trace_seq_putc(p, 0);
  88
  89         return ret;
  90 }
  91
  92 static const char *nvme_trace_common(struct trace_seq *p, u8 *cdw10)
  93 {
  94         const char *ret = trace_seq_buffer_ptr(p);
  95
  96         trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
  97         trace_seq_putc(p, 0);
  98
  99         return ret;
 100 }
 101
 102 const char *nvme_trace_parse_admin_cmd(struct trace_seq *p,
 103                                        u8 opcode, u8 *cdw10)
 104 {
 105         switch (opcode) {
 106         case nvme_admin_create_sq:
 107                 return nvme_trace_create_sq(p, cdw10);
 108         case nvme_admin_create_cq:
 109                 return nvme_trace_create_cq(p, cdw10);
 110         case nvme_admin_identify:
 111                 return nvme_trace_admin_identify(p, cdw10);
 112         default:
 113                 return nvme_trace_common(p, cdw10);
 114         }
 115 }
 116
 117 const char *nvme_trace_parse_nvm_cmd(struct trace_seq *p,
 118                                      u8 opcode, u8 *cdw10)
 119 {
 120         switch (opcode) {
 121         case nvme_cmd_read:
 122         case nvme_cmd_write:
 123         case nvme_cmd_write_zeroes:
 124                 return nvme_trace_read_write(p, cdw10);
 125         case nvme_cmd_dsm:
 126                 return nvme_trace_dsm(p, cdw10);
 127         default:
 128                 return nvme_trace_common(p, cdw10);
 129         }
 130 }