nvme/target/trace.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * NVM Express target device driver tracepoints
0004  * Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
0005  */
0006
0007 #include <asm/unaligned.h>
0008 #include "trace.h"
0009
0010 static const char *nvmet_trace_admin_identify(struct trace_seq *p, u8 *cdw10)
0011 {
0012     const char *ret = trace_seq_buffer_ptr(p);
0013     u8 cns = cdw10[0];
0014     u16 ctrlid = get_unaligned_le16(cdw10 + 2);
0015
0016     trace_seq_printf(p, "cns=%u, ctrlid=%u", cns, ctrlid);
0017     trace_seq_putc(p, 0);
0018
0019     return ret;
0020 }
0021
0022 static const char *nvmet_trace_admin_get_features(struct trace_seq *p,
0023                          u8 *cdw10)
0024 {
0025     const char *ret = trace_seq_buffer_ptr(p);
0026     u8 fid = cdw10[0];
0027     u8 sel = cdw10[1] & 0x7;
0028     u32 cdw11 = get_unaligned_le32(cdw10 + 4);
0029
0030     trace_seq_printf(p, "fid=0x%x, sel=0x%x, cdw11=0x%x", fid, sel, cdw11);
0031     trace_seq_putc(p, 0);
0032
0033     return ret;
0034 }
0035
0036 static const char *nvmet_trace_get_lba_status(struct trace_seq *p,
0037                          u8 *cdw10)
0038 {
0039     const char *ret = trace_seq_buffer_ptr(p);
0040     u64 slba = get_unaligned_le64(cdw10);
0041     u32 mndw = get_unaligned_le32(cdw10 + 8);
0042     u16 rl = get_unaligned_le16(cdw10 + 12);
0043     u8 atype = cdw10[15];
0044
0045     trace_seq_printf(p, "slba=0x%llx, mndw=0x%x, rl=0x%x, atype=%u",
0046             slba, mndw, rl, atype);
0047     trace_seq_putc(p, 0);
0048
0049     return ret;
0050 }
0051
0052 static const char *nvmet_trace_admin_set_features(struct trace_seq *p,
0053                          u8 *cdw10)
0054 {
0055     const char *ret = trace_seq_buffer_ptr(p);
0056     u8 fid = cdw10[0];
0057     u8 sv = cdw10[3] & 0x8;
0058     u32 cdw11 = get_unaligned_le32(cdw10 + 4);
0059
0060     trace_seq_printf(p, "fid=0x%x, sv=0x%x, cdw11=0x%x", fid, sv, cdw11);
0061     trace_seq_putc(p, 0);
0062
0063     return ret;
0064 }
0065
0066 static const char *nvmet_trace_read_write(struct trace_seq *p, u8 *cdw10)
0067 {
0068     const char *ret = trace_seq_buffer_ptr(p);
0069     u64 slba = get_unaligned_le64(cdw10);
0070     u16 length = get_unaligned_le16(cdw10 + 8);
0071     u16 control = get_unaligned_le16(cdw10 + 10);
0072     u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
0073     u32 reftag = get_unaligned_le32(cdw10 +  16);
0074
0075     trace_seq_printf(p,
0076              "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
0077              slba, length, control, dsmgmt, reftag);
0078     trace_seq_putc(p, 0);
0079
0080     return ret;
0081 }
0082
0083 static const char *nvmet_trace_dsm(struct trace_seq *p, u8 *cdw10)
0084 {
0085     const char *ret = trace_seq_buffer_ptr(p);
0086
0087     trace_seq_printf(p, "nr=%u, attributes=%u",
0088              get_unaligned_le32(cdw10),
0089              get_unaligned_le32(cdw10 + 4));
0090     trace_seq_putc(p, 0);
0091
0092     return ret;
0093 }
0094
0095 static const char *nvmet_trace_common(struct trace_seq *p, u8 *cdw10)
0096 {
0097     const char *ret = trace_seq_buffer_ptr(p);
0098
0099     trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
0100     trace_seq_putc(p, 0);
0101
0102     return ret;
0103 }
0104
0105 const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p,
0106         u8 opcode, u8 *cdw10)
0107 {
0108     switch (opcode) {
0109     case nvme_admin_identify:
0110         return nvmet_trace_admin_identify(p, cdw10);
0111     case nvme_admin_set_features:
0112         return nvmet_trace_admin_set_features(p, cdw10);
0113     case nvme_admin_get_features:
0114         return nvmet_trace_admin_get_features(p, cdw10);
0115     case nvme_admin_get_lba_status:
0116         return nvmet_trace_get_lba_status(p, cdw10);
0117     default:
0118         return nvmet_trace_common(p, cdw10);
0119     }
0120 }
0121
0122 const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p,
0123         u8 opcode, u8 *cdw10)
0124 {
0125     switch (opcode) {
0126     case nvme_cmd_read:
0127     case nvme_cmd_write:
0128     case nvme_cmd_write_zeroes:
0129         return nvmet_trace_read_write(p, cdw10);
0130     case nvme_cmd_dsm:
0131         return nvmet_trace_dsm(p, cdw10);
0132     default:
0133         return nvmet_trace_common(p, cdw10);
0134     }
0135 }
0136
0137 static const char *nvmet_trace_fabrics_property_set(struct trace_seq *p,
0138         u8 *spc)
0139 {
0140     const char *ret = trace_seq_buffer_ptr(p);
0141     u8 attrib = spc[0];
0142     u32 ofst = get_unaligned_le32(spc + 4);
0143     u64 value = get_unaligned_le64(spc + 8);
0144
0145     trace_seq_printf(p, "attrib=%u, ofst=0x%x, value=0x%llx",
0146              attrib, ofst, value);
0147     trace_seq_putc(p, 0);
0148     return ret;
0149 }
0150
0151 static const char *nvmet_trace_fabrics_connect(struct trace_seq *p,
0152         u8 *spc)
0153 {
0154     const char *ret = trace_seq_buffer_ptr(p);
0155     u16 recfmt = get_unaligned_le16(spc);
0156     u16 qid = get_unaligned_le16(spc + 2);
0157     u16 sqsize = get_unaligned_le16(spc + 4);
0158     u8 cattr = spc[6];
0159     u32 kato = get_unaligned_le32(spc + 8);
0160
0161     trace_seq_printf(p, "recfmt=%u, qid=%u, sqsize=%u, cattr=%u, kato=%u",
0162              recfmt, qid, sqsize, cattr, kato);
0163     trace_seq_putc(p, 0);
0164     return ret;
0165 }
0166
0167 static const char *nvmet_trace_fabrics_property_get(struct trace_seq *p,
0168         u8 *spc)
0169 {
0170     const char *ret = trace_seq_buffer_ptr(p);
0171     u8 attrib = spc[0];
0172     u32 ofst = get_unaligned_le32(spc + 4);
0173
0174     trace_seq_printf(p, "attrib=%u, ofst=0x%x", attrib, ofst);
0175     trace_seq_putc(p, 0);
0176     return ret;
0177 }
0178
0179 static const char *nvmet_trace_fabrics_common(struct trace_seq *p, u8 *spc)
0180 {
0181     const char *ret = trace_seq_buffer_ptr(p);
0182
0183     trace_seq_printf(p, "specific=%*ph", 24, spc);
0184     trace_seq_putc(p, 0);
0185     return ret;
0186 }
0187
0188 const char *nvmet_trace_parse_fabrics_cmd(struct trace_seq *p,
0189         u8 fctype, u8 *spc)
0190 {
0191     switch (fctype) {
0192     case nvme_fabrics_type_property_set:
0193         return nvmet_trace_fabrics_property_set(p, spc);
0194     case nvme_fabrics_type_connect:
0195         return nvmet_trace_fabrics_connect(p, spc);
0196     case nvme_fabrics_type_property_get:
0197         return nvmet_trace_fabrics_property_get(p, spc);
0198     default:
0199         return nvmet_trace_fabrics_common(p, spc);
0200     }
0201 }
0202
0203 const char *nvmet_trace_disk_name(struct trace_seq *p, char *name)
0204 {
0205     const char *ret = trace_seq_buffer_ptr(p);
0206
0207     if (*name)
0208         trace_seq_printf(p, "disk=%s, ", name);
0209     trace_seq_putc(p, 0);
0210
0211     return ret;
0212 }
0213
0214 const char *nvmet_trace_ctrl_name(struct trace_seq *p, struct nvmet_ctrl *ctrl)
0215 {
0216     const char *ret = trace_seq_buffer_ptr(p);
0217
0218     /*
0219      * XXX: We don't know the controller instance before executing the
0220      * connect command itself because the connect command for the admin
0221      * queue will not provide the cntlid which will be allocated in this
0222      * command.  In case of io queues, the controller instance will be
0223      * mapped by the extra data of the connect command.
0224      * If we can know the extra data of the connect command in this stage,
0225      * we can update this print statement later.
0226      */
0227     if (ctrl)
0228         trace_seq_printf(p, "%d", ctrl->cntlid);
0229     else
0230         trace_seq_printf(p, "_");
0231     trace_seq_putc(p, 0);
0232
0233     return ret;
0234 }
0235