drivers/nvme/target/trace.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * NVM Express target device driver tracepoints
   4  * Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
   5  */
   6
   7 #include <asm/unaligned.h>
   8 #include "trace.h"
   9
  10 static const char *nvmet_trace_admin_identify(struct trace_seq *p, u8 *cdw10)
  11 {
  12         const char *ret = trace_seq_buffer_ptr(p);
  13         u8 cns = cdw10[0];
  14         u16 ctrlid = get_unaligned_le16(cdw10 + 2);
  15
  16         trace_seq_printf(p, "cns=%u, ctrlid=%u", cns, ctrlid);
  17         trace_seq_putc(p, 0);
  18
  19         return ret;
  20 }
  21
  22 static const char *nvmet_trace_admin_get_features(struct trace_seq *p,
  23                                                  u8 *cdw10)
  24 {
  25         const char *ret = trace_seq_buffer_ptr(p);
  26         u8 fid = cdw10[0];
  27         u8 sel = cdw10[1] & 0x7;
  28         u32 cdw11 = get_unaligned_le32(cdw10 + 4);
  29
  30         trace_seq_printf(p, "fid=0x%x, sel=0x%x, cdw11=0x%x", fid, sel, cdw11);
  31         trace_seq_putc(p, 0);
  32
  33         return ret;
  34 }
  35
  36 static const char *nvmet_trace_get_lba_status(struct trace_seq *p,
  37                                              u8 *cdw10)
  38 {
  39         const char *ret = trace_seq_buffer_ptr(p);
  40         u64 slba = get_unaligned_le64(cdw10);
  41         u32 mndw = get_unaligned_le32(cdw10 + 8);
  42         u16 rl = get_unaligned_le16(cdw10 + 12);
  43         u8 atype = cdw10[15];
  44
  45         trace_seq_printf(p, "slba=0x%llx, mndw=0x%x, rl=0x%x, atype=%u",
  46                         slba, mndw, rl, atype);
  47         trace_seq_putc(p, 0);
  48
  49         return ret;
  50 }
  51
  52 static const char *nvmet_trace_admin_set_features(struct trace_seq *p,
  53                                                  u8 *cdw10)
  54 {
  55         const char *ret = trace_seq_buffer_ptr(p);
  56         u8 fid = cdw10[0];
  57         u8 sv = cdw10[3] & 0x8;
  58         u32 cdw11 = get_unaligned_le32(cdw10 + 4);
  59
  60         trace_seq_printf(p, "fid=0x%x, sv=0x%x, cdw11=0x%x", fid, sv, cdw11);
  61         trace_seq_putc(p, 0);
  62
  63         return ret;
  64 }
  65
  66 static const char *nvmet_trace_read_write(struct trace_seq *p, u8 *cdw10)
  67 {
  68         const char *ret = trace_seq_buffer_ptr(p);
  69         u64 slba = get_unaligned_le64(cdw10);
  70         u16 length = get_unaligned_le16(cdw10 + 8);
  71         u16 control = get_unaligned_le16(cdw10 + 10);
  72         u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
  73         u32 reftag = get_unaligned_le32(cdw10 +  16);
  74
  75         trace_seq_printf(p,
  76                          "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
  77                          slba, length, control, dsmgmt, reftag);
  78         trace_seq_putc(p, 0);
  79
  80         return ret;
  81 }
  82
  83 static const char *nvmet_trace_dsm(struct trace_seq *p, u8 *cdw10)
  84 {
  85         const char *ret = trace_seq_buffer_ptr(p);
  86
  87         trace_seq_printf(p, "nr=%u, attributes=%u",
  88                          get_unaligned_le32(cdw10),
  89                          get_unaligned_le32(cdw10 + 4));
  90         trace_seq_putc(p, 0);
  91
  92         return ret;
  93 }
  94
  95 static const char *nvmet_trace_common(struct trace_seq *p, u8 *cdw10)
  96 {
  97         const char *ret = trace_seq_buffer_ptr(p);
  98
  99         trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
 100         trace_seq_putc(p, 0);
 101
 102         return ret;
 103 }
 104
 105 const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p,
 106                 u8 opcode, u8 *cdw10)
 107 {
 108         switch (opcode) {
 109         case nvme_admin_identify:
 110                 return nvmet_trace_admin_identify(p, cdw10);
 111         case nvme_admin_set_features:
 112                 return nvmet_trace_admin_set_features(p, cdw10);
 113         case nvme_admin_get_features:
 114                 return nvmet_trace_admin_get_features(p, cdw10);
 115         case nvme_admin_get_lba_status:
 116                 return nvmet_trace_get_lba_status(p, cdw10);
 117         default:
 118                 return nvmet_trace_common(p, cdw10);
 119         }
 120 }
 121
 122 const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p,
 123                 u8 opcode, u8 *cdw10)
 124 {
 125         switch (opcode) {
 126         case nvme_cmd_read:
 127         case nvme_cmd_write:
 128         case nvme_cmd_write_zeroes:
 129                 return nvmet_trace_read_write(p, cdw10);
 130         case nvme_cmd_dsm:
 131                 return nvmet_trace_dsm(p, cdw10);
 132         default:
 133                 return nvmet_trace_common(p, cdw10);
 134         }
 135 }
 136
 137 static const char *nvmet_trace_fabrics_property_set(struct trace_seq *p,
 138                 u8 *spc)
 139 {
 140         const char *ret = trace_seq_buffer_ptr(p);
 141         u8 attrib = spc[0];
 142         u32 ofst = get_unaligned_le32(spc + 4);
 143         u64 value = get_unaligned_le64(spc + 8);
 144
 145         trace_seq_printf(p, "attrib=%u, ofst=0x%x, value=0x%llx",
 146                          attrib, ofst, value);
 147         trace_seq_putc(p, 0);
 148         return ret;
 149 }
 150
 151 static const char *nvmet_trace_fabrics_connect(struct trace_seq *p,
 152                 u8 *spc)
 153 {
 154         const char *ret = trace_seq_buffer_ptr(p);
 155         u16 recfmt = get_unaligned_le16(spc);
 156         u16 qid = get_unaligned_le16(spc + 2);
 157         u16 sqsize = get_unaligned_le16(spc + 4);
 158         u8 cattr = spc[6];
 159         u32 kato = get_unaligned_le32(spc + 8);
 160
 161         trace_seq_printf(p, "recfmt=%u, qid=%u, sqsize=%u, cattr=%u, kato=%u",
 162                          recfmt, qid, sqsize, cattr, kato);
 163         trace_seq_putc(p, 0);
 164         return ret;
 165 }
 166
 167 static const char *nvmet_trace_fabrics_property_get(struct trace_seq *p,
 168                 u8 *spc)
 169 {
 170         const char *ret = trace_seq_buffer_ptr(p);
 171         u8 attrib = spc[0];
 172         u32 ofst = get_unaligned_le32(spc + 4);
 173
 174         trace_seq_printf(p, "attrib=%u, ofst=0x%x", attrib, ofst);
 175         trace_seq_putc(p, 0);
 176         return ret;
 177 }
 178
 179 static const char *nvmet_trace_fabrics_common(struct trace_seq *p, u8 *spc)
 180 {
 181         const char *ret = trace_seq_buffer_ptr(p);
 182
 183         trace_seq_printf(p, "specific=%*ph", 24, spc);
 184         trace_seq_putc(p, 0);
 185         return ret;
 186 }
 187
 188 const char *nvmet_trace_parse_fabrics_cmd(struct trace_seq *p,
 189                 u8 fctype, u8 *spc)
 190 {
 191         switch (fctype) {
 192         case nvme_fabrics_type_property_set:
 193                 return nvmet_trace_fabrics_property_set(p, spc);
 194         case nvme_fabrics_type_connect:
 195                 return nvmet_trace_fabrics_connect(p, spc);
 196         case nvme_fabrics_type_property_get:
 197                 return nvmet_trace_fabrics_property_get(p, spc);
 198         default:
 199                 return nvmet_trace_fabrics_common(p, spc);
 200         }
 201 }
 202
 203 const char *nvmet_trace_disk_name(struct trace_seq *p, char *name)
 204 {
 205         const char *ret = trace_seq_buffer_ptr(p);
 206
 207         if (*name)
 208                 trace_seq_printf(p, "disk=%s, ", name);
 209         trace_seq_putc(p, 0);
 210
 211         return ret;
 212 }
 213
 214 const char *nvmet_trace_ctrl_id(struct trace_seq *p, u16 ctrl_id)
 215 {
 216         const char *ret = trace_seq_buffer_ptr(p);
 217
 218         /*
 219          * XXX: We don't know the controller instance before executing the
 220          * connect command itself because the connect command for the admin
 221          * queue will not provide the cntlid which will be allocated in this
 222          * command.  In case of io queues, the controller instance will be
 223          * mapped by the extra data of the connect command.
 224          * If we can know the extra data of the connect command in this stage,
 225          * we can update this print statement later.
 226          */
 227         if (ctrl_id)
 228                 trace_seq_printf(p, "%d", ctrl_id);
 229         else
 230                 trace_seq_printf(p, "_");
 231         trace_seq_putc(p, 0);
 232
 233         return ret;
 234 }
 235