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_read_write(struct trace_seq *p, u8 *cdw10)
  53 {
  54         const char *ret = trace_seq_buffer_ptr(p);
  55         u64 slba = get_unaligned_le64(cdw10);
  56         u16 length = get_unaligned_le16(cdw10 + 8);
  57         u16 control = get_unaligned_le16(cdw10 + 10);
  58         u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
  59         u32 reftag = get_unaligned_le32(cdw10 +  16);
  60
  61         trace_seq_printf(p,
  62                          "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
  63                          slba, length, control, dsmgmt, reftag);
  64         trace_seq_putc(p, 0);
  65
  66         return ret;
  67 }
  68
  69 static const char *nvmet_trace_dsm(struct trace_seq *p, u8 *cdw10)
  70 {
  71         const char *ret = trace_seq_buffer_ptr(p);
  72
  73         trace_seq_printf(p, "nr=%u, attributes=%u",
  74                          get_unaligned_le32(cdw10),
  75                          get_unaligned_le32(cdw10 + 4));
  76         trace_seq_putc(p, 0);
  77
  78         return ret;
  79 }
  80
  81 static const char *nvmet_trace_common(struct trace_seq *p, u8 *cdw10)
  82 {
  83         const char *ret = trace_seq_buffer_ptr(p);
  84
  85         trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
  86         trace_seq_putc(p, 0);
  87
  88         return ret;
  89 }
  90
  91 const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p,
  92                 u8 opcode, u8 *cdw10)
  93 {
  94         switch (opcode) {
  95         case nvme_admin_identify:
  96                 return nvmet_trace_admin_identify(p, cdw10);
  97         case nvme_admin_get_features:
  98                 return nvmet_trace_admin_get_features(p, cdw10);
  99         case nvme_admin_get_lba_status:
 100                 return nvmet_trace_get_lba_status(p, cdw10);
 101         default:
 102                 return nvmet_trace_common(p, cdw10);
 103         }
 104 }
 105
 106 const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p,
 107                 u8 opcode, u8 *cdw10)
 108 {
 109         switch (opcode) {
 110         case nvme_cmd_read:
 111         case nvme_cmd_write:
 112         case nvme_cmd_write_zeroes:
 113                 return nvmet_trace_read_write(p, cdw10);
 114         case nvme_cmd_dsm:
 115                 return nvmet_trace_dsm(p, cdw10);
 116         default:
 117                 return nvmet_trace_common(p, cdw10);
 118         }
 119 }
 120
 121 static const char *nvmet_trace_fabrics_property_set(struct trace_seq *p,
 122                 u8 *spc)
 123 {
 124         const char *ret = trace_seq_buffer_ptr(p);
 125         u8 attrib = spc[0];
 126         u32 ofst = get_unaligned_le32(spc + 4);
 127         u64 value = get_unaligned_le64(spc + 8);
 128
 129         trace_seq_printf(p, "attrib=%u, ofst=0x%x, value=0x%llx",
 130                          attrib, ofst, value);
 131         trace_seq_putc(p, 0);
 132         return ret;
 133 }
 134
 135 static const char *nvmet_trace_fabrics_connect(struct trace_seq *p,
 136                 u8 *spc)
 137 {
 138         const char *ret = trace_seq_buffer_ptr(p);
 139         u16 recfmt = get_unaligned_le16(spc);
 140         u16 qid = get_unaligned_le16(spc + 2);
 141         u16 sqsize = get_unaligned_le16(spc + 4);
 142         u8 cattr = spc[6];
 143         u32 kato = get_unaligned_le32(spc + 8);
 144
 145         trace_seq_printf(p, "recfmt=%u, qid=%u, sqsize=%u, cattr=%u, kato=%u",
 146                          recfmt, qid, sqsize, cattr, kato);
 147         trace_seq_putc(p, 0);
 148         return ret;
 149 }
 150
 151 static const char *nvmet_trace_fabrics_property_get(struct trace_seq *p,
 152                 u8 *spc)
 153 {
 154         const char *ret = trace_seq_buffer_ptr(p);
 155         u8 attrib = spc[0];
 156         u32 ofst = get_unaligned_le32(spc + 4);
 157
 158         trace_seq_printf(p, "attrib=%u, ofst=0x%x", attrib, ofst);
 159         trace_seq_putc(p, 0);
 160         return ret;
 161 }
 162
 163 static const char *nvmet_trace_fabrics_common(struct trace_seq *p, u8 *spc)
 164 {
 165         const char *ret = trace_seq_buffer_ptr(p);
 166
 167         trace_seq_printf(p, "specific=%*ph", 24, spc);
 168         trace_seq_putc(p, 0);
 169         return ret;
 170 }
 171
 172 const char *nvmet_trace_parse_fabrics_cmd(struct trace_seq *p,
 173                 u8 fctype, u8 *spc)
 174 {
 175         switch (fctype) {
 176         case nvme_fabrics_type_property_set:
 177                 return nvmet_trace_fabrics_property_set(p, spc);
 178         case nvme_fabrics_type_connect:
 179                 return nvmet_trace_fabrics_connect(p, spc);
 180         case nvme_fabrics_type_property_get:
 181                 return nvmet_trace_fabrics_property_get(p, spc);
 182         default:
 183                 return nvmet_trace_fabrics_common(p, spc);
 184         }
 185 }
 186
 187 const char *nvmet_trace_disk_name(struct trace_seq *p, char *name)
 188 {
 189         const char *ret = trace_seq_buffer_ptr(p);
 190
 191         if (*name)
 192                 trace_seq_printf(p, "disk=%s, ", name);
 193         trace_seq_putc(p, 0);
 194
 195         return ret;
 196 }
 197
 198 const char *nvmet_trace_ctrl_name(struct trace_seq *p, struct nvmet_ctrl *ctrl)
 199 {
 200         const char *ret = trace_seq_buffer_ptr(p);
 201
 202         /*
 203          * XXX: We don't know the controller instance before executing the
 204          * connect command itself because the connect command for the admin
 205          * queue will not provide the cntlid which will be allocated in this
 206          * command.  In case of io queues, the controller instance will be
 207          * mapped by the extra data of the connect command.
 208          * If we can know the extra data of the connect command in this stage,
 209          * we can update this print statement later.
 210          */
 211         if (ctrl)
 212                 trace_seq_printf(p, "%d", ctrl->cntlid);
 213         else
 214                 trace_seq_printf(p, "_");
 215         trace_seq_putc(p, 0);
 216
 217         return ret;
 218 }
 219