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 } 131