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_read_write(struct trace_seq *p, u8 *cdw10)
  37 {
  38         const char *ret = trace_seq_buffer_ptr(p);
  39         u64 slba = get_unaligned_le64(cdw10);
  40         u16 length = get_unaligned_le16(cdw10 + 8);
  41         u16 control = get_unaligned_le16(cdw10 + 10);
  42         u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
  43         u32 reftag = get_unaligned_le32(cdw10 +  16);
  44
  45         trace_seq_printf(p,
  46                          "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
  47                          slba, length, control, dsmgmt, reftag);
  48         trace_seq_putc(p, 0);
  49
  50         return ret;
  51 }
  52
  53 static const char *nvmet_trace_dsm(struct trace_seq *p, u8 *cdw10)
  54 {
  55         const char *ret = trace_seq_buffer_ptr(p);
  56
  57         trace_seq_printf(p, "nr=%u, attributes=%u",
  58                          get_unaligned_le32(cdw10),
  59                          get_unaligned_le32(cdw10 + 4));
  60         trace_seq_putc(p, 0);
  61
  62         return ret;
  63 }
  64
  65 static const char *nvmet_trace_common(struct trace_seq *p, u8 *cdw10)
  66 {
  67         const char *ret = trace_seq_buffer_ptr(p);
  68
  69         trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
  70         trace_seq_putc(p, 0);
  71
  72         return ret;
  73 }
  74
  75 const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p,
  76                 u8 opcode, u8 *cdw10)
  77 {
  78         switch (opcode) {
  79         case nvme_admin_identify:
  80                 return nvmet_trace_admin_identify(p, cdw10);
  81         case nvme_admin_get_features:
  82                 return nvmet_trace_admin_get_features(p, cdw10);
  83         default:
  84                 return nvmet_trace_common(p, cdw10);
  85         }
  86 }
  87
  88 const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p,
  89                 u8 opcode, u8 *cdw10)
  90 {
  91         switch (opcode) {
  92         case nvme_cmd_read:
  93         case nvme_cmd_write:
  94         case nvme_cmd_write_zeroes:
  95                 return nvmet_trace_read_write(p, cdw10);
  96         case nvme_cmd_dsm:
  97                 return nvmet_trace_dsm(p, cdw10);
  98         default:
  99                 return nvmet_trace_common(p, cdw10);
 100         }
 101 }
 102
 103 static const char *nvmet_trace_fabrics_property_set(struct trace_seq *p,
 104                 u8 *spc)
 105 {
 106         const char *ret = trace_seq_buffer_ptr(p);
 107         u8 attrib = spc[0];
 108         u32 ofst = get_unaligned_le32(spc + 4);
 109         u64 value = get_unaligned_le64(spc + 8);
 110
 111         trace_seq_printf(p, "attrib=%u, ofst=0x%x, value=0x%llx",
 112                          attrib, ofst, value);
 113         trace_seq_putc(p, 0);
 114         return ret;
 115 }
 116
 117 static const char *nvmet_trace_fabrics_connect(struct trace_seq *p,
 118                 u8 *spc)
 119 {
 120         const char *ret = trace_seq_buffer_ptr(p);
 121         u16 recfmt = get_unaligned_le16(spc);
 122         u16 qid = get_unaligned_le16(spc + 2);
 123         u16 sqsize = get_unaligned_le16(spc + 4);
 124         u8 cattr = spc[6];
 125         u32 kato = get_unaligned_le32(spc + 8);
 126
 127         trace_seq_printf(p, "recfmt=%u, qid=%u, sqsize=%u, cattr=%u, kato=%u",
 128                          recfmt, qid, sqsize, cattr, kato);
 129         trace_seq_putc(p, 0);
 130         return ret;
 131 }
 132
 133 static const char *nvmet_trace_fabrics_property_get(struct trace_seq *p,
 134                 u8 *spc)
 135 {
 136         const char *ret = trace_seq_buffer_ptr(p);
 137         u8 attrib = spc[0];
 138         u32 ofst = get_unaligned_le32(spc + 4);
 139
 140         trace_seq_printf(p, "attrib=%u, ofst=0x%x", attrib, ofst);
 141         trace_seq_putc(p, 0);
 142         return ret;
 143 }
 144
 145 static const char *nvmet_trace_fabrics_common(struct trace_seq *p, u8 *spc)
 146 {
 147         const char *ret = trace_seq_buffer_ptr(p);
 148
 149         trace_seq_printf(p, "specific=%*ph", 24, spc);
 150         trace_seq_putc(p, 0);
 151         return ret;
 152 }
 153
 154 const char *nvmet_trace_parse_fabrics_cmd(struct trace_seq *p,
 155                 u8 fctype, u8 *spc)
 156 {
 157         switch (fctype) {
 158         case nvme_fabrics_type_property_set:
 159                 return nvmet_trace_fabrics_property_set(p, spc);
 160         case nvme_fabrics_type_connect:
 161                 return nvmet_trace_fabrics_connect(p, spc);
 162         case nvme_fabrics_type_property_get:
 163                 return nvmet_trace_fabrics_property_get(p, spc);
 164         default:
 165                 return nvmet_trace_fabrics_common(p, spc);
 166         }
 167 }
 168
 169 const char *nvmet_trace_disk_name(struct trace_seq *p, char *name)
 170 {
 171         const char *ret = trace_seq_buffer_ptr(p);
 172
 173         if (*name)
 174                 trace_seq_printf(p, "disk=%s, ", name);
 175         trace_seq_putc(p, 0);
 176
 177         return ret;
 178 }
 179
 180 const char *nvmet_trace_ctrl_name(struct trace_seq *p, struct nvmet_ctrl *ctrl)
 181 {
 182         const char *ret = trace_seq_buffer_ptr(p);
 183
 184         /*
 185          * XXX: We don't know the controller instance before executing the
 186          * connect command itself because the connect command for the admin
 187          * queue will not provide the cntlid which will be allocated in this
 188          * command.  In case of io queues, the controller instance will be
 189          * mapped by the extra data of the connect command.
 190          * If we can know the extra data of the connect command in this stage,
 191          * we can update this print statement later.
 192          */
 193         if (ctrl)
 194                 trace_seq_printf(p, "%d", ctrl->cntlid);
 195         else
 196                 trace_seq_printf(p, "_");
 197         trace_seq_putc(p, 0);
 198
 199         return ret;
 200 }
 201