1 /* 2 * Copyright 2012 Cisco Systems, Inc. All rights reserved. 3 * 4 * This program is free software; you may redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; version 2 of the License. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 15 * SOFTWARE. 16 */ 17 18 #include <linux/module.h> 19 #include <linux/mempool.h> 20 #include <linux/errno.h> 21 #include <linux/spinlock.h> 22 #include <linux/kallsyms.h> 23 #include <linux/time.h> 24 #include <linux/vmalloc.h> 25 #include "fnic_io.h" 26 #include "fnic.h" 27 28 unsigned int trace_max_pages; 29 static int fnic_max_trace_entries; 30 31 static unsigned long fnic_trace_buf_p; 32 static DEFINE_SPINLOCK(fnic_trace_lock); 33 34 static fnic_trace_dbg_t fnic_trace_entries; 35 int fnic_tracing_enabled = 1; 36 37 /* static char *fnic_fc_ctlr_trace_buf_p; */ 38 39 static int fc_trace_max_entries; 40 static unsigned long fnic_fc_ctlr_trace_buf_p; 41 static fnic_trace_dbg_t fc_trace_entries; 42 int fnic_fc_tracing_enabled = 1; 43 int fnic_fc_trace_cleared = 1; 44 static DEFINE_SPINLOCK(fnic_fc_trace_lock); 45 46 47 /* 48 * fnic_trace_get_buf - Give buffer pointer to user to fill up trace information 49 * 50 * Description: 51 * This routine gets next available trace buffer entry location @wr_idx 52 * from allocated trace buffer pages and give that memory location 53 * to user to store the trace information. 54 * 55 * Return Value: 56 * This routine returns pointer to next available trace entry 57 * @fnic_buf_head for user to fill trace information. 58 */ 59 fnic_trace_data_t *fnic_trace_get_buf(void) 60 { 61 unsigned long fnic_buf_head; 62 unsigned long flags; 63 64 spin_lock_irqsave(&fnic_trace_lock, flags); 65 66 /* 67 * Get next available memory location for writing trace information 68 * at @wr_idx and increment @wr_idx 69 */ 70 fnic_buf_head = 71 fnic_trace_entries.page_offset[fnic_trace_entries.wr_idx]; 72 fnic_trace_entries.wr_idx++; 73 74 /* 75 * Verify if trace buffer is full then change wd_idx to 76 * start from zero 77 */ 78 if (fnic_trace_entries.wr_idx >= fnic_max_trace_entries) 79 fnic_trace_entries.wr_idx = 0; 80 81 /* 82 * Verify if write index @wr_idx and read index @rd_idx are same then 83 * increment @rd_idx to move to next entry in trace buffer 84 */ 85 if (fnic_trace_entries.wr_idx == fnic_trace_entries.rd_idx) { 86 fnic_trace_entries.rd_idx++; 87 if (fnic_trace_entries.rd_idx >= fnic_max_trace_entries) 88 fnic_trace_entries.rd_idx = 0; 89 } 90 spin_unlock_irqrestore(&fnic_trace_lock, flags); 91 return (fnic_trace_data_t *)fnic_buf_head; 92 } 93 94 /* 95 * fnic_get_trace_data - Copy trace buffer to a memory file 96 * @fnic_dbgfs_t: pointer to debugfs trace buffer 97 * 98 * Description: 99 * This routine gathers the fnic trace debugfs data from the fnic_trace_data_t 100 * buffer and dumps it to fnic_dbgfs_t. It will start at the rd_idx entry in 101 * the log and process the log until the end of the buffer. Then it will gather 102 * from the beginning of the log and process until the current entry @wr_idx. 103 * 104 * Return Value: 105 * This routine returns the amount of bytes that were dumped into fnic_dbgfs_t 106 */ 107 int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt) 108 { 109 int rd_idx; 110 int wr_idx; 111 int len = 0; 112 unsigned long flags; 113 char str[KSYM_SYMBOL_LEN]; 114 struct timespec val; 115 fnic_trace_data_t *tbp; 116 117 spin_lock_irqsave(&fnic_trace_lock, flags); 118 rd_idx = fnic_trace_entries.rd_idx; 119 wr_idx = fnic_trace_entries.wr_idx; 120 if (wr_idx < rd_idx) { 121 while (1) { 122 /* Start from read index @rd_idx */ 123 tbp = (fnic_trace_data_t *) 124 fnic_trace_entries.page_offset[rd_idx]; 125 if (!tbp) { 126 spin_unlock_irqrestore(&fnic_trace_lock, flags); 127 return 0; 128 } 129 /* Convert function pointer to function name */ 130 if (sizeof(unsigned long) < 8) { 131 sprint_symbol(str, tbp->fnaddr.low); 132 jiffies_to_timespec(tbp->timestamp.low, &val); 133 } else { 134 sprint_symbol(str, tbp->fnaddr.val); 135 jiffies_to_timespec(tbp->timestamp.val, &val); 136 } 137 /* 138 * Dump trace buffer entry to memory file 139 * and increment read index @rd_idx 140 */ 141 len += snprintf(fnic_dbgfs_prt->buffer + len, 142 (trace_max_pages * PAGE_SIZE * 3) - len, 143 "%16lu.%16lu %-50s %8x %8x %16llx %16llx " 144 "%16llx %16llx %16llx\n", val.tv_sec, 145 val.tv_nsec, str, tbp->host_no, tbp->tag, 146 tbp->data[0], tbp->data[1], tbp->data[2], 147 tbp->data[3], tbp->data[4]); 148 rd_idx++; 149 /* 150 * If rd_idx is reached to maximum trace entries 151 * then move rd_idx to zero 152 */ 153 if (rd_idx > (fnic_max_trace_entries-1)) 154 rd_idx = 0; 155 /* 156 * Continure dumpping trace buffer entries into 157 * memory file till rd_idx reaches write index 158 */ 159 if (rd_idx == wr_idx) 160 break; 161 } 162 } else if (wr_idx > rd_idx) { 163 while (1) { 164 /* Start from read index @rd_idx */ 165 tbp = (fnic_trace_data_t *) 166 fnic_trace_entries.page_offset[rd_idx]; 167 if (!tbp) { 168 spin_unlock_irqrestore(&fnic_trace_lock, flags); 169 return 0; 170 } 171 /* Convert function pointer to function name */ 172 if (sizeof(unsigned long) < 8) { 173 sprint_symbol(str, tbp->fnaddr.low); 174 jiffies_to_timespec(tbp->timestamp.low, &val); 175 } else { 176 sprint_symbol(str, tbp->fnaddr.val); 177 jiffies_to_timespec(tbp->timestamp.val, &val); 178 } 179 /* 180 * Dump trace buffer entry to memory file 181 * and increment read index @rd_idx 182 */ 183 len += snprintf(fnic_dbgfs_prt->buffer + len, 184 (trace_max_pages * PAGE_SIZE * 3) - len, 185 "%16lu.%16lu %-50s %8x %8x %16llx %16llx " 186 "%16llx %16llx %16llx\n", val.tv_sec, 187 val.tv_nsec, str, tbp->host_no, tbp->tag, 188 tbp->data[0], tbp->data[1], tbp->data[2], 189 tbp->data[3], tbp->data[4]); 190 rd_idx++; 191 /* 192 * Continue dumpping trace buffer entries into 193 * memory file till rd_idx reaches write index 194 */ 195 if (rd_idx == wr_idx) 196 break; 197 } 198 } 199 spin_unlock_irqrestore(&fnic_trace_lock, flags); 200 return len; 201 } 202 203 /* 204 * fnic_get_stats_data - Copy fnic stats buffer to a memory file 205 * @fnic_dbgfs_t: pointer to debugfs fnic stats buffer 206 * 207 * Description: 208 * This routine gathers the fnic stats debugfs data from the fnic_stats struct 209 * and dumps it to stats_debug_info. 210 * 211 * Return Value: 212 * This routine returns the amount of bytes that were dumped into 213 * stats_debug_info 214 */ 215 int fnic_get_stats_data(struct stats_debug_info *debug, 216 struct fnic_stats *stats) 217 { 218 int len = 0; 219 int buf_size = debug->buf_size; 220 struct timespec val1, val2; 221 222 len = snprintf(debug->debug_buffer + len, buf_size - len, 223 "------------------------------------------\n" 224 "\t\tIO Statistics\n" 225 "------------------------------------------\n"); 226 len += snprintf(debug->debug_buffer + len, buf_size - len, 227 "Number of Active IOs: %lld\nMaximum Active IOs: %lld\n" 228 "Number of IOs: %lld\nNumber of IO Completions: %lld\n" 229 "Number of IO Failures: %lld\nNumber of IO NOT Found: %lld\n" 230 "Number of Memory alloc Failures: %lld\n" 231 "Number of IOREQ Null: %lld\n" 232 "Number of SCSI cmd pointer Null: %lld\n" 233 234 "\nIO completion times: \n" 235 " < 10 ms : %lld\n" 236 " 10 ms - 100 ms : %lld\n" 237 " 100 ms - 500 ms : %lld\n" 238 " 500 ms - 5 sec: %lld\n" 239 " 5 sec - 10 sec: %lld\n" 240 " 10 sec - 30 sec: %lld\n" 241 " > 30 sec: %lld\n", 242 (u64)atomic64_read(&stats->io_stats.active_ios), 243 (u64)atomic64_read(&stats->io_stats.max_active_ios), 244 (u64)atomic64_read(&stats->io_stats.num_ios), 245 (u64)atomic64_read(&stats->io_stats.io_completions), 246 (u64)atomic64_read(&stats->io_stats.io_failures), 247 (u64)atomic64_read(&stats->io_stats.io_not_found), 248 (u64)atomic64_read(&stats->io_stats.alloc_failures), 249 (u64)atomic64_read(&stats->io_stats.ioreq_null), 250 (u64)atomic64_read(&stats->io_stats.sc_null), 251 (u64)atomic64_read(&stats->io_stats.io_btw_0_to_10_msec), 252 (u64)atomic64_read(&stats->io_stats.io_btw_10_to_100_msec), 253 (u64)atomic64_read(&stats->io_stats.io_btw_100_to_500_msec), 254 (u64)atomic64_read(&stats->io_stats.io_btw_500_to_5000_msec), 255 (u64)atomic64_read(&stats->io_stats.io_btw_5000_to_10000_msec), 256 (u64)atomic64_read(&stats->io_stats.io_btw_10000_to_30000_msec), 257 (u64)atomic64_read(&stats->io_stats.io_greater_than_30000_msec)); 258 259 len += snprintf(debug->debug_buffer + len, buf_size - len, 260 "\nCurrent Max IO time : %lld\n", 261 (u64)atomic64_read(&stats->io_stats.current_max_io_time)); 262 263 len += snprintf(debug->debug_buffer + len, buf_size - len, 264 "\n------------------------------------------\n" 265 "\t\tAbort Statistics\n" 266 "------------------------------------------\n"); 267 268 len += snprintf(debug->debug_buffer + len, buf_size - len, 269 "Number of Aborts: %lld\n" 270 "Number of Abort Failures: %lld\n" 271 "Number of Abort Driver Timeouts: %lld\n" 272 "Number of Abort FW Timeouts: %lld\n" 273 "Number of Abort IO NOT Found: %lld\n" 274 275 "Abord issued times: \n" 276 " < 6 sec : %lld\n" 277 " 6 sec - 20 sec : %lld\n" 278 " 20 sec - 30 sec : %lld\n" 279 " 30 sec - 40 sec : %lld\n" 280 " 40 sec - 50 sec : %lld\n" 281 " 50 sec - 60 sec : %lld\n" 282 " > 60 sec: %lld\n", 283 284 (u64)atomic64_read(&stats->abts_stats.aborts), 285 (u64)atomic64_read(&stats->abts_stats.abort_failures), 286 (u64)atomic64_read(&stats->abts_stats.abort_drv_timeouts), 287 (u64)atomic64_read(&stats->abts_stats.abort_fw_timeouts), 288 (u64)atomic64_read(&stats->abts_stats.abort_io_not_found), 289 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_0_to_6_sec), 290 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_6_to_20_sec), 291 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_20_to_30_sec), 292 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_30_to_40_sec), 293 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_40_to_50_sec), 294 (u64)atomic64_read(&stats->abts_stats.abort_issued_btw_50_to_60_sec), 295 (u64)atomic64_read(&stats->abts_stats.abort_issued_greater_than_60_sec)); 296 297 len += snprintf(debug->debug_buffer + len, buf_size - len, 298 "\n------------------------------------------\n" 299 "\t\tTerminate Statistics\n" 300 "------------------------------------------\n"); 301 302 len += snprintf(debug->debug_buffer + len, buf_size - len, 303 "Number of Terminates: %lld\n" 304 "Maximum Terminates: %lld\n" 305 "Number of Terminate Driver Timeouts: %lld\n" 306 "Number of Terminate FW Timeouts: %lld\n" 307 "Number of Terminate IO NOT Found: %lld\n" 308 "Number of Terminate Failures: %lld\n", 309 (u64)atomic64_read(&stats->term_stats.terminates), 310 (u64)atomic64_read(&stats->term_stats.max_terminates), 311 (u64)atomic64_read(&stats->term_stats.terminate_drv_timeouts), 312 (u64)atomic64_read(&stats->term_stats.terminate_fw_timeouts), 313 (u64)atomic64_read(&stats->term_stats.terminate_io_not_found), 314 (u64)atomic64_read(&stats->term_stats.terminate_failures)); 315 316 len += snprintf(debug->debug_buffer + len, buf_size - len, 317 "\n------------------------------------------\n" 318 "\t\tReset Statistics\n" 319 "------------------------------------------\n"); 320 321 len += snprintf(debug->debug_buffer + len, buf_size - len, 322 "Number of Device Resets: %lld\n" 323 "Number of Device Reset Failures: %lld\n" 324 "Number of Device Reset Aborts: %lld\n" 325 "Number of Device Reset Timeouts: %lld\n" 326 "Number of Device Reset Terminates: %lld\n" 327 "Number of FW Resets: %lld\n" 328 "Number of FW Reset Completions: %lld\n" 329 "Number of FW Reset Failures: %lld\n" 330 "Number of Fnic Reset: %lld\n" 331 "Number of Fnic Reset Completions: %lld\n" 332 "Number of Fnic Reset Failures: %lld\n", 333 (u64)atomic64_read(&stats->reset_stats.device_resets), 334 (u64)atomic64_read(&stats->reset_stats.device_reset_failures), 335 (u64)atomic64_read(&stats->reset_stats.device_reset_aborts), 336 (u64)atomic64_read(&stats->reset_stats.device_reset_timeouts), 337 (u64)atomic64_read( 338 &stats->reset_stats.device_reset_terminates), 339 (u64)atomic64_read(&stats->reset_stats.fw_resets), 340 (u64)atomic64_read(&stats->reset_stats.fw_reset_completions), 341 (u64)atomic64_read(&stats->reset_stats.fw_reset_failures), 342 (u64)atomic64_read(&stats->reset_stats.fnic_resets), 343 (u64)atomic64_read( 344 &stats->reset_stats.fnic_reset_completions), 345 (u64)atomic64_read(&stats->reset_stats.fnic_reset_failures)); 346 347 len += snprintf(debug->debug_buffer + len, buf_size - len, 348 "\n------------------------------------------\n" 349 "\t\tFirmware Statistics\n" 350 "------------------------------------------\n"); 351 352 len += snprintf(debug->debug_buffer + len, buf_size - len, 353 "Number of Active FW Requests %lld\n" 354 "Maximum FW Requests: %lld\n" 355 "Number of FW out of resources: %lld\n" 356 "Number of FW IO errors: %lld\n", 357 (u64)atomic64_read(&stats->fw_stats.active_fw_reqs), 358 (u64)atomic64_read(&stats->fw_stats.max_fw_reqs), 359 (u64)atomic64_read(&stats->fw_stats.fw_out_of_resources), 360 (u64)atomic64_read(&stats->fw_stats.io_fw_errs)); 361 362 len += snprintf(debug->debug_buffer + len, buf_size - len, 363 "\n------------------------------------------\n" 364 "\t\tVlan Discovery Statistics\n" 365 "------------------------------------------\n"); 366 367 len += snprintf(debug->debug_buffer + len, buf_size - len, 368 "Number of Vlan Discovery Requests Sent %lld\n" 369 "Vlan Response Received with no FCF VLAN ID: %lld\n" 370 "No solicitations recvd after vlan set, expiry count: %lld\n" 371 "Flogi rejects count: %lld\n", 372 (u64)atomic64_read(&stats->vlan_stats.vlan_disc_reqs), 373 (u64)atomic64_read(&stats->vlan_stats.resp_withno_vlanID), 374 (u64)atomic64_read(&stats->vlan_stats.sol_expiry_count), 375 (u64)atomic64_read(&stats->vlan_stats.flogi_rejects)); 376 377 len += snprintf(debug->debug_buffer + len, buf_size - len, 378 "\n------------------------------------------\n" 379 "\t\tOther Important Statistics\n" 380 "------------------------------------------\n"); 381 382 jiffies_to_timespec(stats->misc_stats.last_isr_time, &val1); 383 jiffies_to_timespec(stats->misc_stats.last_ack_time, &val2); 384 385 len += snprintf(debug->debug_buffer + len, buf_size - len, 386 "Last ISR time: %llu (%8lu.%8lu)\n" 387 "Last ACK time: %llu (%8lu.%8lu)\n" 388 "Number of ISRs: %lld\n" 389 "Maximum CQ Entries: %lld\n" 390 "Number of ACK index out of range: %lld\n" 391 "Number of data count mismatch: %lld\n" 392 "Number of FCPIO Timeouts: %lld\n" 393 "Number of FCPIO Aborted: %lld\n" 394 "Number of SGL Invalid: %lld\n" 395 "Number of Copy WQ Alloc Failures for ABTs: %lld\n" 396 "Number of Copy WQ Alloc Failures for Device Reset: %lld\n" 397 "Number of Copy WQ Alloc Failures for IOs: %lld\n" 398 "Number of no icmnd itmf Completions: %lld\n" 399 "Number of Check Conditions encountered: %lld\n" 400 "Number of QUEUE Fulls: %lld\n" 401 "Number of rport not ready: %lld\n" 402 "Number of receive frame errors: %lld\n", 403 (u64)stats->misc_stats.last_isr_time, 404 val1.tv_sec, val1.tv_nsec, 405 (u64)stats->misc_stats.last_ack_time, 406 val2.tv_sec, val2.tv_nsec, 407 (u64)atomic64_read(&stats->misc_stats.isr_count), 408 (u64)atomic64_read(&stats->misc_stats.max_cq_entries), 409 (u64)atomic64_read(&stats->misc_stats.ack_index_out_of_range), 410 (u64)atomic64_read(&stats->misc_stats.data_count_mismatch), 411 (u64)atomic64_read(&stats->misc_stats.fcpio_timeout), 412 (u64)atomic64_read(&stats->misc_stats.fcpio_aborted), 413 (u64)atomic64_read(&stats->misc_stats.sgl_invalid), 414 (u64)atomic64_read( 415 &stats->misc_stats.abts_cpwq_alloc_failures), 416 (u64)atomic64_read( 417 &stats->misc_stats.devrst_cpwq_alloc_failures), 418 (u64)atomic64_read(&stats->misc_stats.io_cpwq_alloc_failures), 419 (u64)atomic64_read(&stats->misc_stats.no_icmnd_itmf_cmpls), 420 (u64)atomic64_read(&stats->misc_stats.check_condition), 421 (u64)atomic64_read(&stats->misc_stats.queue_fulls), 422 (u64)atomic64_read(&stats->misc_stats.rport_not_ready), 423 (u64)atomic64_read(&stats->misc_stats.frame_errors)); 424 425 return len; 426 427 } 428 429 /* 430 * fnic_trace_buf_init - Initialize fnic trace buffer logging facility 431 * 432 * Description: 433 * Initialize trace buffer data structure by allocating required memory and 434 * setting page_offset information for every trace entry by adding trace entry 435 * length to previous page_offset value. 436 */ 437 int fnic_trace_buf_init(void) 438 { 439 unsigned long fnic_buf_head; 440 int i; 441 int err = 0; 442 443 trace_max_pages = fnic_trace_max_pages; 444 fnic_max_trace_entries = (trace_max_pages * PAGE_SIZE)/ 445 FNIC_ENTRY_SIZE_BYTES; 446 447 fnic_trace_buf_p = (unsigned long)vmalloc((trace_max_pages * PAGE_SIZE)); 448 if (!fnic_trace_buf_p) { 449 printk(KERN_ERR PFX "Failed to allocate memory " 450 "for fnic_trace_buf_p\n"); 451 err = -ENOMEM; 452 goto err_fnic_trace_buf_init; 453 } 454 memset((void *)fnic_trace_buf_p, 0, (trace_max_pages * PAGE_SIZE)); 455 456 fnic_trace_entries.page_offset = vmalloc(fnic_max_trace_entries * 457 sizeof(unsigned long)); 458 if (!fnic_trace_entries.page_offset) { 459 printk(KERN_ERR PFX "Failed to allocate memory for" 460 " page_offset\n"); 461 if (fnic_trace_buf_p) { 462 vfree((void *)fnic_trace_buf_p); 463 fnic_trace_buf_p = 0; 464 } 465 err = -ENOMEM; 466 goto err_fnic_trace_buf_init; 467 } 468 memset((void *)fnic_trace_entries.page_offset, 0, 469 (fnic_max_trace_entries * sizeof(unsigned long))); 470 fnic_trace_entries.wr_idx = fnic_trace_entries.rd_idx = 0; 471 fnic_buf_head = fnic_trace_buf_p; 472 473 /* 474 * Set page_offset field of fnic_trace_entries struct by 475 * calculating memory location for every trace entry using 476 * length of each trace entry 477 */ 478 for (i = 0; i < fnic_max_trace_entries; i++) { 479 fnic_trace_entries.page_offset[i] = fnic_buf_head; 480 fnic_buf_head += FNIC_ENTRY_SIZE_BYTES; 481 } 482 err = fnic_trace_debugfs_init(); 483 if (err < 0) { 484 pr_err("fnic: Failed to initialize debugfs for tracing\n"); 485 goto err_fnic_trace_debugfs_init; 486 } 487 pr_info("fnic: Successfully Initialized Trace Buffer\n"); 488 return err; 489 err_fnic_trace_debugfs_init: 490 fnic_trace_free(); 491 err_fnic_trace_buf_init: 492 return err; 493 } 494 495 /* 496 * fnic_trace_free - Free memory of fnic trace data structures. 497 */ 498 void fnic_trace_free(void) 499 { 500 fnic_tracing_enabled = 0; 501 fnic_trace_debugfs_terminate(); 502 if (fnic_trace_entries.page_offset) { 503 vfree((void *)fnic_trace_entries.page_offset); 504 fnic_trace_entries.page_offset = NULL; 505 } 506 if (fnic_trace_buf_p) { 507 vfree((void *)fnic_trace_buf_p); 508 fnic_trace_buf_p = 0; 509 } 510 printk(KERN_INFO PFX "Successfully Freed Trace Buffer\n"); 511 } 512 513 /* 514 * fnic_fc_ctlr_trace_buf_init - 515 * Initialize trace buffer to log fnic control frames 516 * Description: 517 * Initialize trace buffer data structure by allocating 518 * required memory for trace data as well as for Indexes. 519 * Frame size is 256 bytes and 520 * memory is allocated for 1024 entries of 256 bytes. 521 * Page_offset(Index) is set to the address of trace entry 522 * and page_offset is initialized by adding frame size 523 * to the previous page_offset entry. 524 */ 525 526 int fnic_fc_trace_init(void) 527 { 528 unsigned long fc_trace_buf_head; 529 int err = 0; 530 int i; 531 532 fc_trace_max_entries = (fnic_fc_trace_max_pages * PAGE_SIZE)/ 533 FC_TRC_SIZE_BYTES; 534 fnic_fc_ctlr_trace_buf_p = (unsigned long)vmalloc( 535 fnic_fc_trace_max_pages * PAGE_SIZE); 536 if (!fnic_fc_ctlr_trace_buf_p) { 537 pr_err("fnic: Failed to allocate memory for " 538 "FC Control Trace Buf\n"); 539 err = -ENOMEM; 540 goto err_fnic_fc_ctlr_trace_buf_init; 541 } 542 543 memset((void *)fnic_fc_ctlr_trace_buf_p, 0, 544 fnic_fc_trace_max_pages * PAGE_SIZE); 545 546 /* Allocate memory for page offset */ 547 fc_trace_entries.page_offset = vmalloc(fc_trace_max_entries * 548 sizeof(unsigned long)); 549 if (!fc_trace_entries.page_offset) { 550 pr_err("fnic:Failed to allocate memory for page_offset\n"); 551 if (fnic_fc_ctlr_trace_buf_p) { 552 pr_err("fnic: Freeing FC Control Trace Buf\n"); 553 vfree((void *)fnic_fc_ctlr_trace_buf_p); 554 fnic_fc_ctlr_trace_buf_p = 0; 555 } 556 err = -ENOMEM; 557 goto err_fnic_fc_ctlr_trace_buf_init; 558 } 559 memset((void *)fc_trace_entries.page_offset, 0, 560 (fc_trace_max_entries * sizeof(unsigned long))); 561 562 fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0; 563 fc_trace_buf_head = fnic_fc_ctlr_trace_buf_p; 564 565 /* 566 * Set up fc_trace_entries.page_offset field with memory location 567 * for every trace entry 568 */ 569 for (i = 0; i < fc_trace_max_entries; i++) { 570 fc_trace_entries.page_offset[i] = fc_trace_buf_head; 571 fc_trace_buf_head += FC_TRC_SIZE_BYTES; 572 } 573 err = fnic_fc_trace_debugfs_init(); 574 if (err < 0) { 575 pr_err("fnic: Failed to initialize FC_CTLR tracing.\n"); 576 goto err_fnic_fc_ctlr_trace_debugfs_init; 577 } 578 pr_info("fnic: Successfully Initialized FC_CTLR Trace Buffer\n"); 579 return err; 580 581 err_fnic_fc_ctlr_trace_debugfs_init: 582 fnic_fc_trace_free(); 583 err_fnic_fc_ctlr_trace_buf_init: 584 return err; 585 } 586 587 /* 588 * Fnic_fc_ctlr_trace_free - Free memory of fnic_fc_ctlr trace data structures. 589 */ 590 void fnic_fc_trace_free(void) 591 { 592 fnic_fc_tracing_enabled = 0; 593 fnic_fc_trace_debugfs_terminate(); 594 if (fc_trace_entries.page_offset) { 595 vfree((void *)fc_trace_entries.page_offset); 596 fc_trace_entries.page_offset = NULL; 597 } 598 if (fnic_fc_ctlr_trace_buf_p) { 599 vfree((void *)fnic_fc_ctlr_trace_buf_p); 600 fnic_fc_ctlr_trace_buf_p = 0; 601 } 602 pr_info("fnic:Successfully FC_CTLR Freed Trace Buffer\n"); 603 } 604 605 /* 606 * fnic_fc_ctlr_set_trace_data: 607 * Maintain rd & wr idx accordingly and set data 608 * Passed parameters: 609 * host_no: host number accociated with fnic 610 * frame_type: send_frame, rece_frame or link event 611 * fc_frame: pointer to fc_frame 612 * frame_len: Length of the fc_frame 613 * Description: 614 * This routine will get next available wr_idx and 615 * copy all passed trace data to the buffer pointed by wr_idx 616 * and increment wr_idx. It will also make sure that we dont 617 * overwrite the entry which we are reading and also 618 * wrap around if we reach the maximum entries. 619 * Returned Value: 620 * It will return 0 for success or -1 for failure 621 */ 622 int fnic_fc_trace_set_data(u32 host_no, u8 frame_type, 623 char *frame, u32 fc_trc_frame_len) 624 { 625 unsigned long flags; 626 struct fc_trace_hdr *fc_buf; 627 unsigned long eth_fcoe_hdr_len; 628 char *fc_trace; 629 630 if (fnic_fc_tracing_enabled == 0) 631 return 0; 632 633 spin_lock_irqsave(&fnic_fc_trace_lock, flags); 634 635 if (fnic_fc_trace_cleared == 1) { 636 fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0; 637 pr_info("fnic: Resetting the read idx\n"); 638 memset((void *)fnic_fc_ctlr_trace_buf_p, 0, 639 fnic_fc_trace_max_pages * PAGE_SIZE); 640 fnic_fc_trace_cleared = 0; 641 } 642 643 fc_buf = (struct fc_trace_hdr *) 644 fc_trace_entries.page_offset[fc_trace_entries.wr_idx]; 645 646 fc_trace_entries.wr_idx++; 647 648 if (fc_trace_entries.wr_idx >= fc_trace_max_entries) 649 fc_trace_entries.wr_idx = 0; 650 651 if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) { 652 fc_trace_entries.rd_idx++; 653 if (fc_trace_entries.rd_idx >= fc_trace_max_entries) 654 fc_trace_entries.rd_idx = 0; 655 } 656 657 ktime_get_real_ts64(&fc_buf->time_stamp); 658 fc_buf->host_no = host_no; 659 fc_buf->frame_type = frame_type; 660 661 fc_trace = (char *)FC_TRACE_ADDRESS(fc_buf); 662 663 /* During the receive path, we do not have eth hdr as well as fcoe hdr 664 * at trace entry point so we will stuff 0xff just to make it generic. 665 */ 666 if (frame_type == FNIC_FC_RECV) { 667 eth_fcoe_hdr_len = sizeof(struct ethhdr) + 668 sizeof(struct fcoe_hdr); 669 memset((char *)fc_trace, 0xff, eth_fcoe_hdr_len); 670 /* Copy the rest of data frame */ 671 memcpy((char *)(fc_trace + eth_fcoe_hdr_len), (void *)frame, 672 min_t(u8, fc_trc_frame_len, 673 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE 674 - eth_fcoe_hdr_len))); 675 } else { 676 memcpy((char *)fc_trace, (void *)frame, 677 min_t(u8, fc_trc_frame_len, 678 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE))); 679 } 680 681 /* Store the actual received length */ 682 fc_buf->frame_len = fc_trc_frame_len; 683 684 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags); 685 return 0; 686 } 687 688 /* 689 * fnic_fc_ctlr_get_trace_data: Copy trace buffer to a memory file 690 * Passed parameter: 691 * @fnic_dbgfs_t: pointer to debugfs trace buffer 692 * rdata_flag: 1 => Unformated file 693 * 0 => formated file 694 * Description: 695 * This routine will copy the trace data to memory file with 696 * proper formatting and also copy to another memory 697 * file without formatting for further procesing. 698 * Retrun Value: 699 * Number of bytes that were dumped into fnic_dbgfs_t 700 */ 701 702 int fnic_fc_trace_get_data(fnic_dbgfs_t *fnic_dbgfs_prt, u8 rdata_flag) 703 { 704 int rd_idx, wr_idx; 705 unsigned long flags; 706 int len = 0, j; 707 struct fc_trace_hdr *tdata; 708 char *fc_trace; 709 710 spin_lock_irqsave(&fnic_fc_trace_lock, flags); 711 if (fc_trace_entries.wr_idx == fc_trace_entries.rd_idx) { 712 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags); 713 pr_info("fnic: Buffer is empty\n"); 714 return 0; 715 } 716 rd_idx = fc_trace_entries.rd_idx; 717 wr_idx = fc_trace_entries.wr_idx; 718 if (rdata_flag == 0) { 719 len += snprintf(fnic_dbgfs_prt->buffer + len, 720 (fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len, 721 "Time Stamp (UTC)\t\t" 722 "Host No: F Type: len: FCoE_FRAME:\n"); 723 } 724 725 while (rd_idx != wr_idx) { 726 tdata = (struct fc_trace_hdr *) 727 fc_trace_entries.page_offset[rd_idx]; 728 if (!tdata) { 729 pr_info("fnic: Rd data is NULL\n"); 730 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags); 731 return 0; 732 } 733 if (rdata_flag == 0) { 734 copy_and_format_trace_data(tdata, 735 fnic_dbgfs_prt, &len, rdata_flag); 736 } else { 737 fc_trace = (char *)tdata; 738 for (j = 0; j < FC_TRC_SIZE_BYTES; j++) { 739 len += snprintf(fnic_dbgfs_prt->buffer + len, 740 (fnic_fc_trace_max_pages * PAGE_SIZE * 3) 741 - len, "%02x", fc_trace[j] & 0xff); 742 } /* for loop */ 743 len += snprintf(fnic_dbgfs_prt->buffer + len, 744 (fnic_fc_trace_max_pages * PAGE_SIZE * 3) - len, 745 "\n"); 746 } 747 rd_idx++; 748 if (rd_idx > (fc_trace_max_entries - 1)) 749 rd_idx = 0; 750 } 751 752 spin_unlock_irqrestore(&fnic_fc_trace_lock, flags); 753 return len; 754 } 755 756 /* 757 * copy_and_format_trace_data: Copy formatted data to char * buffer 758 * Passed Parameter: 759 * @fc_trace_hdr_t: pointer to trace data 760 * @fnic_dbgfs_t: pointer to debugfs trace buffer 761 * @orig_len: pointer to len 762 * rdata_flag: 0 => Formated file, 1 => Unformated file 763 * Description: 764 * This routine will format and copy the passed trace data 765 * for formated file or unformated file accordingly. 766 */ 767 768 void copy_and_format_trace_data(struct fc_trace_hdr *tdata, 769 fnic_dbgfs_t *fnic_dbgfs_prt, int *orig_len, 770 u8 rdata_flag) 771 { 772 struct tm tm; 773 int j, i = 1, len; 774 char *fc_trace, *fmt; 775 int ethhdr_len = sizeof(struct ethhdr) - 1; 776 int fcoehdr_len = sizeof(struct fcoe_hdr); 777 int fchdr_len = sizeof(struct fc_frame_header); 778 int max_size = fnic_fc_trace_max_pages * PAGE_SIZE * 3; 779 780 tdata->frame_type = tdata->frame_type & 0x7F; 781 782 len = *orig_len; 783 784 time64_to_tm(tdata->time_stamp.tv_sec, 0, &tm); 785 786 fmt = "%02d:%02d:%04ld %02d:%02d:%02d.%09lu ns%8x %c%8x\t"; 787 len += snprintf(fnic_dbgfs_prt->buffer + len, 788 max_size - len, 789 fmt, 790 tm.tm_mon + 1, tm.tm_mday, tm.tm_year + 1900, 791 tm.tm_hour, tm.tm_min, tm.tm_sec, 792 tdata->time_stamp.tv_nsec, tdata->host_no, 793 tdata->frame_type, tdata->frame_len); 794 795 fc_trace = (char *)FC_TRACE_ADDRESS(tdata); 796 797 for (j = 0; j < min_t(u8, tdata->frame_len, 798 (u8)(FC_TRC_SIZE_BYTES - FC_TRC_HEADER_SIZE)); j++) { 799 if (tdata->frame_type == FNIC_FC_LE) { 800 len += snprintf(fnic_dbgfs_prt->buffer + len, 801 max_size - len, "%c", fc_trace[j]); 802 } else { 803 len += snprintf(fnic_dbgfs_prt->buffer + len, 804 max_size - len, "%02x", fc_trace[j] & 0xff); 805 len += snprintf(fnic_dbgfs_prt->buffer + len, 806 max_size - len, " "); 807 if (j == ethhdr_len || 808 j == ethhdr_len + fcoehdr_len || 809 j == ethhdr_len + fcoehdr_len + fchdr_len || 810 (i > 3 && j%fchdr_len == 0)) { 811 len += snprintf(fnic_dbgfs_prt->buffer 812 + len, max_size - len, 813 "\n\t\t\t\t\t\t\t\t"); 814 i++; 815 } 816 } /* end of else*/ 817 } /* End of for loop*/ 818 len += snprintf(fnic_dbgfs_prt->buffer + len, 819 max_size - len, "\n"); 820 *orig_len = len; 821 } 822