1 /*- 2 * Copyright (C) 2012 Intel Corporation 3 * All rights reserved. 4 * Copyright (C) 2018 Alexander Motin <mav@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include "opt_ddb.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/conf.h> 37 #include <sys/domainset.h> 38 #include <sys/fail.h> 39 #include <sys/ioccom.h> 40 #include <sys/kernel.h> 41 #include <sys/ktr.h> 42 #include <sys/lock.h> 43 #include <sys/malloc.h> 44 #include <sys/module.h> 45 #include <sys/mutex.h> 46 #include <sys/rman.h> 47 #include <sys/sbuf.h> 48 #include <sys/smp.h> 49 #include <sys/sysctl.h> 50 #include <sys/taskqueue.h> 51 #include <sys/time.h> 52 #include <dev/pci/pcireg.h> 53 #include <dev/pci/pcivar.h> 54 #include <machine/bus.h> 55 #include <machine/resource.h> 56 #include <machine/stdarg.h> 57 58 #ifdef DDB 59 #include <ddb/ddb.h> 60 #endif 61 62 #include "ioat.h" 63 #include "ioat_hw.h" 64 #include "ioat_internal.h" 65 66 #ifndef BUS_SPACE_MAXADDR_40BIT 67 #define BUS_SPACE_MAXADDR_40BIT MIN(BUS_SPACE_MAXADDR, 0xFFFFFFFFFFULL) 68 #endif 69 #ifndef BUS_SPACE_MAXADDR_46BIT 70 #define BUS_SPACE_MAXADDR_46BIT MIN(BUS_SPACE_MAXADDR, 0x3FFFFFFFFFFFULL) 71 #endif 72 73 static int ioat_modevent(module_t mod, int type, void *data); 74 static int ioat_probe(device_t device); 75 static int ioat_attach(device_t device); 76 static int ioat_detach(device_t device); 77 static int ioat_setup_intr(struct ioat_softc *ioat); 78 static int ioat_teardown_intr(struct ioat_softc *ioat); 79 static int ioat3_attach(device_t device); 80 static int ioat_start_channel(struct ioat_softc *ioat); 81 static int ioat_map_pci_bar(struct ioat_softc *ioat); 82 static void ioat_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, 83 int error); 84 static void ioat_interrupt_handler(void *arg); 85 static boolean_t ioat_model_resets_msix(struct ioat_softc *ioat); 86 static int chanerr_to_errno(uint32_t); 87 static void ioat_process_events(struct ioat_softc *ioat, boolean_t intr); 88 static inline uint32_t ioat_get_active(struct ioat_softc *ioat); 89 static inline uint32_t ioat_get_ring_space(struct ioat_softc *ioat); 90 static void ioat_free_ring(struct ioat_softc *, uint32_t size, 91 struct ioat_descriptor *); 92 static int ioat_reserve_space(struct ioat_softc *, uint32_t, int mflags); 93 static union ioat_hw_descriptor *ioat_get_descriptor(struct ioat_softc *, 94 uint32_t index); 95 static struct ioat_descriptor *ioat_get_ring_entry(struct ioat_softc *, 96 uint32_t index); 97 static void ioat_halted_debug(struct ioat_softc *, uint32_t); 98 static void ioat_poll_timer_callback(void *arg); 99 static void dump_descriptor(void *hw_desc); 100 static void ioat_submit_single(struct ioat_softc *ioat); 101 static void ioat_comp_update_map(void *arg, bus_dma_segment_t *seg, int nseg, 102 int error); 103 static int ioat_reset_hw(struct ioat_softc *ioat); 104 static void ioat_reset_hw_task(void *, int); 105 static void ioat_setup_sysctl(device_t device); 106 static int sysctl_handle_reset(SYSCTL_HANDLER_ARGS); 107 static void ioat_get(struct ioat_softc *); 108 static void ioat_put(struct ioat_softc *); 109 static void ioat_drain_locked(struct ioat_softc *); 110 111 #define ioat_log_message(v, ...) do { \ 112 if ((v) <= g_ioat_debug_level) { \ 113 device_printf(ioat->device, __VA_ARGS__); \ 114 } \ 115 } while (0) 116 117 MALLOC_DEFINE(M_IOAT, "ioat", "ioat driver memory allocations"); 118 SYSCTL_NODE(_hw, OID_AUTO, ioat, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 119 "ioat node"); 120 121 static int g_force_legacy_interrupts; 122 SYSCTL_INT(_hw_ioat, OID_AUTO, force_legacy_interrupts, CTLFLAG_RDTUN, 123 &g_force_legacy_interrupts, 0, "Set to non-zero to force MSI-X disabled"); 124 125 int g_ioat_debug_level = 0; 126 SYSCTL_INT(_hw_ioat, OID_AUTO, debug_level, CTLFLAG_RWTUN, &g_ioat_debug_level, 127 0, "Set log level (0-3) for ioat(4). Higher is more verbose."); 128 129 unsigned g_ioat_ring_order = 13; 130 SYSCTL_UINT(_hw_ioat, OID_AUTO, ring_order, CTLFLAG_RDTUN, &g_ioat_ring_order, 131 0, "Set IOAT ring order. (1 << this) == ring size."); 132 133 /* 134 * OS <-> Driver interface structures 135 */ 136 static device_method_t ioat_pci_methods[] = { 137 /* Device interface */ 138 DEVMETHOD(device_probe, ioat_probe), 139 DEVMETHOD(device_attach, ioat_attach), 140 DEVMETHOD(device_detach, ioat_detach), 141 DEVMETHOD_END 142 }; 143 144 static driver_t ioat_pci_driver = { 145 "ioat", 146 ioat_pci_methods, 147 sizeof(struct ioat_softc), 148 }; 149 150 DRIVER_MODULE(ioat, pci, ioat_pci_driver, ioat_modevent, NULL); 151 MODULE_VERSION(ioat, 1); 152 153 /* 154 * Private data structures 155 */ 156 static struct ioat_softc *ioat_channel[IOAT_MAX_CHANNELS]; 157 static unsigned ioat_channel_index = 0; 158 SYSCTL_UINT(_hw_ioat, OID_AUTO, channels, CTLFLAG_RD, &ioat_channel_index, 0, 159 "Number of IOAT channels attached"); 160 static struct mtx ioat_list_mtx; 161 MTX_SYSINIT(ioat_list_mtx, &ioat_list_mtx, "ioat list mtx", MTX_DEF); 162 163 static struct _pcsid 164 { 165 u_int32_t type; 166 const char *desc; 167 } pci_ids[] = { 168 { 0x34308086, "TBG IOAT Ch0" }, 169 { 0x34318086, "TBG IOAT Ch1" }, 170 { 0x34328086, "TBG IOAT Ch2" }, 171 { 0x34338086, "TBG IOAT Ch3" }, 172 { 0x34298086, "TBG IOAT Ch4" }, 173 { 0x342a8086, "TBG IOAT Ch5" }, 174 { 0x342b8086, "TBG IOAT Ch6" }, 175 { 0x342c8086, "TBG IOAT Ch7" }, 176 177 { 0x37108086, "JSF IOAT Ch0" }, 178 { 0x37118086, "JSF IOAT Ch1" }, 179 { 0x37128086, "JSF IOAT Ch2" }, 180 { 0x37138086, "JSF IOAT Ch3" }, 181 { 0x37148086, "JSF IOAT Ch4" }, 182 { 0x37158086, "JSF IOAT Ch5" }, 183 { 0x37168086, "JSF IOAT Ch6" }, 184 { 0x37178086, "JSF IOAT Ch7" }, 185 { 0x37188086, "JSF IOAT Ch0 (RAID)" }, 186 { 0x37198086, "JSF IOAT Ch1 (RAID)" }, 187 188 { 0x3c208086, "SNB IOAT Ch0" }, 189 { 0x3c218086, "SNB IOAT Ch1" }, 190 { 0x3c228086, "SNB IOAT Ch2" }, 191 { 0x3c238086, "SNB IOAT Ch3" }, 192 { 0x3c248086, "SNB IOAT Ch4" }, 193 { 0x3c258086, "SNB IOAT Ch5" }, 194 { 0x3c268086, "SNB IOAT Ch6" }, 195 { 0x3c278086, "SNB IOAT Ch7" }, 196 { 0x3c2e8086, "SNB IOAT Ch0 (RAID)" }, 197 { 0x3c2f8086, "SNB IOAT Ch1 (RAID)" }, 198 199 { 0x0e208086, "IVB IOAT Ch0" }, 200 { 0x0e218086, "IVB IOAT Ch1" }, 201 { 0x0e228086, "IVB IOAT Ch2" }, 202 { 0x0e238086, "IVB IOAT Ch3" }, 203 { 0x0e248086, "IVB IOAT Ch4" }, 204 { 0x0e258086, "IVB IOAT Ch5" }, 205 { 0x0e268086, "IVB IOAT Ch6" }, 206 { 0x0e278086, "IVB IOAT Ch7" }, 207 { 0x0e2e8086, "IVB IOAT Ch0 (RAID)" }, 208 { 0x0e2f8086, "IVB IOAT Ch1 (RAID)" }, 209 210 { 0x2f208086, "HSW IOAT Ch0" }, 211 { 0x2f218086, "HSW IOAT Ch1" }, 212 { 0x2f228086, "HSW IOAT Ch2" }, 213 { 0x2f238086, "HSW IOAT Ch3" }, 214 { 0x2f248086, "HSW IOAT Ch4" }, 215 { 0x2f258086, "HSW IOAT Ch5" }, 216 { 0x2f268086, "HSW IOAT Ch6" }, 217 { 0x2f278086, "HSW IOAT Ch7" }, 218 { 0x2f2e8086, "HSW IOAT Ch0 (RAID)" }, 219 { 0x2f2f8086, "HSW IOAT Ch1 (RAID)" }, 220 221 { 0x0c508086, "BWD IOAT Ch0" }, 222 { 0x0c518086, "BWD IOAT Ch1" }, 223 { 0x0c528086, "BWD IOAT Ch2" }, 224 { 0x0c538086, "BWD IOAT Ch3" }, 225 226 { 0x6f508086, "BDXDE IOAT Ch0" }, 227 { 0x6f518086, "BDXDE IOAT Ch1" }, 228 { 0x6f528086, "BDXDE IOAT Ch2" }, 229 { 0x6f538086, "BDXDE IOAT Ch3" }, 230 231 { 0x6f208086, "BDX IOAT Ch0" }, 232 { 0x6f218086, "BDX IOAT Ch1" }, 233 { 0x6f228086, "BDX IOAT Ch2" }, 234 { 0x6f238086, "BDX IOAT Ch3" }, 235 { 0x6f248086, "BDX IOAT Ch4" }, 236 { 0x6f258086, "BDX IOAT Ch5" }, 237 { 0x6f268086, "BDX IOAT Ch6" }, 238 { 0x6f278086, "BDX IOAT Ch7" }, 239 { 0x6f2e8086, "BDX IOAT Ch0 (RAID)" }, 240 { 0x6f2f8086, "BDX IOAT Ch1 (RAID)" }, 241 242 { 0x20218086, "SKX IOAT" }, 243 }; 244 245 MODULE_PNP_INFO("W32:vendor/device;D:#", pci, ioat, pci_ids, 246 nitems(pci_ids)); 247 248 /* 249 * OS <-> Driver linkage functions 250 */ 251 static int 252 ioat_modevent(module_t mod __unused, int type, void *data __unused) 253 { 254 switch(type) { 255 case MOD_LOAD: 256 break; 257 258 case MOD_UNLOAD: 259 ioat_test_detach(); 260 break; 261 262 case MOD_SHUTDOWN: 263 break; 264 265 default: 266 return (EOPNOTSUPP); 267 } 268 269 return (0); 270 } 271 272 static int 273 ioat_probe(device_t device) 274 { 275 struct _pcsid *ep; 276 u_int32_t type; 277 278 type = pci_get_devid(device); 279 for (ep = pci_ids; ep < &pci_ids[nitems(pci_ids)]; ep++) { 280 if (ep->type == type) { 281 device_set_desc(device, ep->desc); 282 return (0); 283 } 284 } 285 return (ENXIO); 286 } 287 288 static int 289 ioat_attach(device_t device) 290 { 291 struct ioat_softc *ioat; 292 int error, i; 293 294 ioat = DEVICE2SOFTC(device); 295 ioat->device = device; 296 if (bus_get_domain(device, &ioat->domain) != 0) 297 ioat->domain = 0; 298 ioat->cpu = CPU_FFS(&cpuset_domain[ioat->domain]) - 1; 299 if (ioat->cpu < 0) 300 ioat->cpu = CPU_FIRST(); 301 302 error = ioat_map_pci_bar(ioat); 303 if (error != 0) 304 goto err; 305 306 ioat->version = ioat_read_cbver(ioat); 307 if (ioat->version < IOAT_VER_3_0) { 308 error = ENODEV; 309 goto err; 310 } 311 312 error = ioat3_attach(device); 313 if (error != 0) 314 goto err; 315 316 error = pci_enable_busmaster(device); 317 if (error != 0) 318 goto err; 319 320 error = ioat_setup_intr(ioat); 321 if (error != 0) 322 goto err; 323 324 error = ioat_reset_hw(ioat); 325 if (error != 0) 326 goto err; 327 328 ioat_process_events(ioat, FALSE); 329 ioat_setup_sysctl(device); 330 331 mtx_lock(&ioat_list_mtx); 332 for (i = 0; i < IOAT_MAX_CHANNELS; i++) { 333 if (ioat_channel[i] == NULL) 334 break; 335 } 336 if (i >= IOAT_MAX_CHANNELS) { 337 mtx_unlock(&ioat_list_mtx); 338 device_printf(device, "Too many I/OAT devices in system\n"); 339 error = ENXIO; 340 goto err; 341 } 342 ioat->chan_idx = i; 343 ioat_channel[i] = ioat; 344 if (i >= ioat_channel_index) 345 ioat_channel_index = i + 1; 346 mtx_unlock(&ioat_list_mtx); 347 348 ioat_test_attach(); 349 350 err: 351 if (error != 0) 352 ioat_detach(device); 353 return (error); 354 } 355 356 static inline int 357 ioat_bus_dmamap_destroy(struct ioat_softc *ioat, const char *func, 358 bus_dma_tag_t dmat, bus_dmamap_t map) 359 { 360 int error; 361 362 error = bus_dmamap_destroy(dmat, map); 363 if (error != 0) { 364 ioat_log_message(0, 365 "%s: bus_dmamap_destroy failed %d\n", func, error); 366 } 367 368 return (error); 369 } 370 371 static int 372 ioat_detach(device_t device) 373 { 374 struct ioat_softc *ioat; 375 int i, error; 376 377 ioat = DEVICE2SOFTC(device); 378 379 mtx_lock(&ioat_list_mtx); 380 ioat_channel[ioat->chan_idx] = NULL; 381 while (ioat_channel_index > 0 && 382 ioat_channel[ioat_channel_index - 1] == NULL) 383 ioat_channel_index--; 384 mtx_unlock(&ioat_list_mtx); 385 386 taskqueue_drain(taskqueue_thread, &ioat->reset_task); 387 388 mtx_lock(&ioat->submit_lock); 389 ioat->quiescing = TRUE; 390 ioat->destroying = TRUE; 391 wakeup(&ioat->quiescing); 392 wakeup(&ioat->resetting); 393 394 ioat_drain_locked(ioat); 395 mtx_unlock(&ioat->submit_lock); 396 mtx_lock(&ioat->cleanup_lock); 397 while (ioat_get_active(ioat) > 0) 398 msleep(&ioat->tail, &ioat->cleanup_lock, 0, "ioat_drain", 1); 399 mtx_unlock(&ioat->cleanup_lock); 400 401 ioat_teardown_intr(ioat); 402 callout_drain(&ioat->poll_timer); 403 404 pci_disable_busmaster(device); 405 406 if (ioat->pci_resource != NULL) 407 bus_release_resource(device, SYS_RES_MEMORY, 408 ioat->pci_resource_id, ioat->pci_resource); 409 410 if (ioat->data_tag != NULL) { 411 for (i = 0; i < 1 << ioat->ring_size_order; i++) { 412 error = ioat_bus_dmamap_destroy(ioat, __func__, 413 ioat->data_tag, ioat->ring[i].src_dmamap); 414 if (error != 0) 415 return (error); 416 } 417 for (i = 0; i < 1 << ioat->ring_size_order; i++) { 418 error = ioat_bus_dmamap_destroy(ioat, __func__, 419 ioat->data_tag, ioat->ring[i].dst_dmamap); 420 if (error != 0) 421 return (error); 422 } 423 424 for (i = 0; i < 1 << ioat->ring_size_order; i++) { 425 error = ioat_bus_dmamap_destroy(ioat, __func__, 426 ioat->data_tag, ioat->ring[i].src2_dmamap); 427 if (error != 0) 428 return (error); 429 } 430 for (i = 0; i < 1 << ioat->ring_size_order; i++) { 431 error = ioat_bus_dmamap_destroy(ioat, __func__, 432 ioat->data_tag, ioat->ring[i].dst2_dmamap); 433 if (error != 0) 434 return (error); 435 } 436 437 bus_dma_tag_destroy(ioat->data_tag); 438 } 439 440 if (ioat->ring != NULL) 441 ioat_free_ring(ioat, 1 << ioat->ring_size_order, ioat->ring); 442 443 if (ioat->comp_update != NULL) { 444 bus_dmamap_unload(ioat->comp_update_tag, ioat->comp_update_map); 445 bus_dmamem_free(ioat->comp_update_tag, ioat->comp_update, 446 ioat->comp_update_map); 447 bus_dma_tag_destroy(ioat->comp_update_tag); 448 } 449 450 if (ioat->hw_desc_ring != NULL) { 451 bus_dmamap_unload(ioat->hw_desc_tag, ioat->hw_desc_map); 452 bus_dmamem_free(ioat->hw_desc_tag, ioat->hw_desc_ring, 453 ioat->hw_desc_map); 454 bus_dma_tag_destroy(ioat->hw_desc_tag); 455 } 456 457 return (0); 458 } 459 460 static int 461 ioat_teardown_intr(struct ioat_softc *ioat) 462 { 463 464 if (ioat->tag != NULL) 465 bus_teardown_intr(ioat->device, ioat->res, ioat->tag); 466 467 if (ioat->res != NULL) 468 bus_release_resource(ioat->device, SYS_RES_IRQ, 469 rman_get_rid(ioat->res), ioat->res); 470 471 pci_release_msi(ioat->device); 472 return (0); 473 } 474 475 static int 476 ioat_start_channel(struct ioat_softc *ioat) 477 { 478 struct ioat_dma_hw_descriptor *hw_desc; 479 struct ioat_descriptor *desc; 480 struct bus_dmadesc *dmadesc; 481 uint64_t status; 482 uint32_t chanerr; 483 int i; 484 485 ioat_acquire(&ioat->dmaengine); 486 487 /* Submit 'NULL' operation manually to avoid quiescing flag */ 488 desc = ioat_get_ring_entry(ioat, ioat->head); 489 hw_desc = &ioat_get_descriptor(ioat, ioat->head)->dma; 490 dmadesc = &desc->bus_dmadesc; 491 492 dmadesc->callback_fn = NULL; 493 dmadesc->callback_arg = NULL; 494 495 hw_desc->u.control_raw = 0; 496 hw_desc->u.control_generic.op = IOAT_OP_COPY; 497 hw_desc->u.control_generic.completion_update = 1; 498 hw_desc->size = 8; 499 hw_desc->src_addr = 0; 500 hw_desc->dest_addr = 0; 501 hw_desc->u.control.null = 1; 502 503 ioat_submit_single(ioat); 504 ioat_release(&ioat->dmaengine); 505 506 for (i = 0; i < 100; i++) { 507 DELAY(1); 508 status = ioat_get_chansts(ioat); 509 if (is_ioat_idle(status)) 510 return (0); 511 } 512 513 chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 514 ioat_log_message(0, "could not start channel: " 515 "status = %#jx error = %b\n", (uintmax_t)status, (int)chanerr, 516 IOAT_CHANERR_STR); 517 return (ENXIO); 518 } 519 520 /* 521 * Initialize Hardware 522 */ 523 static int 524 ioat3_attach(device_t device) 525 { 526 struct ioat_softc *ioat; 527 struct ioat_descriptor *ring; 528 struct ioat_dma_hw_descriptor *dma_hw_desc; 529 void *hw_desc; 530 bus_addr_t lowaddr; 531 size_t ringsz; 532 int i, num_descriptors; 533 int error; 534 uint8_t xfercap; 535 536 error = 0; 537 ioat = DEVICE2SOFTC(device); 538 ioat->capabilities = ioat_read_dmacapability(ioat); 539 540 ioat_log_message(0, "Capabilities: %b\n", (int)ioat->capabilities, 541 IOAT_DMACAP_STR); 542 543 xfercap = ioat_read_xfercap(ioat); 544 ioat->max_xfer_size = 1 << xfercap; 545 546 ioat->intrdelay_supported = (ioat_read_2(ioat, IOAT_INTRDELAY_OFFSET) & 547 IOAT_INTRDELAY_SUPPORTED) != 0; 548 if (ioat->intrdelay_supported) 549 ioat->intrdelay_max = IOAT_INTRDELAY_US_MASK; 550 551 /* TODO: need to check DCA here if we ever do XOR/PQ */ 552 553 mtx_init(&ioat->submit_lock, "ioat_submit", NULL, MTX_DEF); 554 mtx_init(&ioat->cleanup_lock, "ioat_cleanup", NULL, MTX_DEF); 555 callout_init(&ioat->poll_timer, 1); 556 TASK_INIT(&ioat->reset_task, 0, ioat_reset_hw_task, ioat); 557 558 /* Establish lock order for Witness */ 559 mtx_lock(&ioat->cleanup_lock); 560 mtx_lock(&ioat->submit_lock); 561 mtx_unlock(&ioat->submit_lock); 562 mtx_unlock(&ioat->cleanup_lock); 563 564 ioat->is_submitter_processing = FALSE; 565 566 if (ioat->version >= IOAT_VER_3_3) 567 lowaddr = BUS_SPACE_MAXADDR_48BIT; 568 else if (ioat->version >= IOAT_VER_3_2) 569 lowaddr = BUS_SPACE_MAXADDR_46BIT; 570 else 571 lowaddr = BUS_SPACE_MAXADDR_40BIT; 572 573 error = bus_dma_tag_create(bus_get_dma_tag(ioat->device), 574 sizeof(uint64_t), 0x0, lowaddr, BUS_SPACE_MAXADDR, NULL, NULL, 575 sizeof(uint64_t), 1, sizeof(uint64_t), 0, NULL, NULL, 576 &ioat->comp_update_tag); 577 if (error != 0) 578 return (error); 579 580 error = bus_dmamem_alloc(ioat->comp_update_tag, 581 (void **)&ioat->comp_update, BUS_DMA_ZERO | BUS_DMA_WAITOK, 582 &ioat->comp_update_map); 583 if (error != 0) 584 return (error); 585 586 error = bus_dmamap_load(ioat->comp_update_tag, ioat->comp_update_map, 587 ioat->comp_update, sizeof(uint64_t), ioat_comp_update_map, ioat, 588 BUS_DMA_NOWAIT); 589 if (error != 0) 590 return (error); 591 592 ioat->ring_size_order = g_ioat_ring_order; 593 num_descriptors = 1 << ioat->ring_size_order; 594 ringsz = sizeof(struct ioat_dma_hw_descriptor) * num_descriptors; 595 596 error = bus_dma_tag_create(bus_get_dma_tag(ioat->device), 597 2 * 1024 * 1024, 0x0, lowaddr, BUS_SPACE_MAXADDR, NULL, NULL, 598 ringsz, 1, ringsz, 0, NULL, NULL, &ioat->hw_desc_tag); 599 if (error != 0) 600 return (error); 601 602 error = bus_dmamem_alloc(ioat->hw_desc_tag, &hw_desc, 603 BUS_DMA_ZERO | BUS_DMA_WAITOK, &ioat->hw_desc_map); 604 if (error != 0) 605 return (error); 606 607 error = bus_dmamap_load(ioat->hw_desc_tag, ioat->hw_desc_map, hw_desc, 608 ringsz, ioat_dmamap_cb, &ioat->hw_desc_bus_addr, BUS_DMA_NOWAIT); 609 if (error) 610 return (error); 611 612 ioat->hw_desc_ring = hw_desc; 613 614 error = bus_dma_tag_create(bus_get_dma_tag(ioat->device), 615 1, 0, lowaddr, BUS_SPACE_MAXADDR, NULL, NULL, 616 ioat->max_xfer_size, 1, ioat->max_xfer_size, 0, NULL, NULL, 617 &ioat->data_tag); 618 if (error != 0) 619 return (error); 620 ioat->ring = malloc_domainset(num_descriptors * sizeof(*ring), M_IOAT, 621 DOMAINSET_PREF(ioat->domain), M_ZERO | M_WAITOK); 622 623 ring = ioat->ring; 624 for (i = 0; i < num_descriptors; i++) { 625 memset(&ring[i].bus_dmadesc, 0, sizeof(ring[i].bus_dmadesc)); 626 ring[i].id = i; 627 error = bus_dmamap_create(ioat->data_tag, 0, 628 &ring[i].src_dmamap); 629 if (error != 0) { 630 ioat_log_message(0, 631 "%s: bus_dmamap_create failed %d\n", __func__, 632 error); 633 return (error); 634 } 635 error = bus_dmamap_create(ioat->data_tag, 0, 636 &ring[i].dst_dmamap); 637 if (error != 0) { 638 ioat_log_message(0, 639 "%s: bus_dmamap_create failed %d\n", __func__, 640 error); 641 return (error); 642 } 643 error = bus_dmamap_create(ioat->data_tag, 0, 644 &ring[i].src2_dmamap); 645 if (error != 0) { 646 ioat_log_message(0, 647 "%s: bus_dmamap_create failed %d\n", __func__, 648 error); 649 return (error); 650 } 651 error = bus_dmamap_create(ioat->data_tag, 0, 652 &ring[i].dst2_dmamap); 653 if (error != 0) { 654 ioat_log_message(0, 655 "%s: bus_dmamap_create failed %d\n", __func__, 656 error); 657 return (error); 658 } 659 } 660 661 for (i = 0; i < num_descriptors; i++) { 662 dma_hw_desc = &ioat->hw_desc_ring[i].dma; 663 dma_hw_desc->next = RING_PHYS_ADDR(ioat, i + 1); 664 } 665 666 ioat->tail = ioat->head = 0; 667 *ioat->comp_update = ioat->last_seen = 668 RING_PHYS_ADDR(ioat, ioat->tail - 1); 669 return (0); 670 } 671 672 static int 673 ioat_map_pci_bar(struct ioat_softc *ioat) 674 { 675 676 ioat->pci_resource_id = PCIR_BAR(0); 677 ioat->pci_resource = bus_alloc_resource_any(ioat->device, 678 SYS_RES_MEMORY, &ioat->pci_resource_id, RF_ACTIVE); 679 680 if (ioat->pci_resource == NULL) { 681 ioat_log_message(0, "unable to allocate pci resource\n"); 682 return (ENODEV); 683 } 684 685 ioat->pci_bus_tag = rman_get_bustag(ioat->pci_resource); 686 ioat->pci_bus_handle = rman_get_bushandle(ioat->pci_resource); 687 return (0); 688 } 689 690 static void 691 ioat_comp_update_map(void *arg, bus_dma_segment_t *seg, int nseg, int error) 692 { 693 struct ioat_softc *ioat = arg; 694 695 KASSERT(error == 0, ("%s: error:%d", __func__, error)); 696 ioat->comp_update_bus_addr = seg[0].ds_addr; 697 } 698 699 static void 700 ioat_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 701 { 702 bus_addr_t *baddr; 703 704 KASSERT(error == 0, ("%s: error:%d", __func__, error)); 705 baddr = arg; 706 *baddr = segs->ds_addr; 707 } 708 709 /* 710 * Interrupt setup and handlers 711 */ 712 static int 713 ioat_setup_intr(struct ioat_softc *ioat) 714 { 715 uint32_t num_vectors; 716 int error; 717 boolean_t use_msix; 718 719 use_msix = FALSE; 720 721 if (!g_force_legacy_interrupts && pci_msix_count(ioat->device) >= 1) { 722 num_vectors = 1; 723 pci_alloc_msix(ioat->device, &num_vectors); 724 if (num_vectors == 1) 725 use_msix = TRUE; 726 } 727 728 if (use_msix) { 729 ioat->rid = 1; 730 ioat->res = bus_alloc_resource_any(ioat->device, SYS_RES_IRQ, 731 &ioat->rid, RF_ACTIVE); 732 } else { 733 ioat->rid = 0; 734 ioat->res = bus_alloc_resource_any(ioat->device, SYS_RES_IRQ, 735 &ioat->rid, RF_SHAREABLE | RF_ACTIVE); 736 } 737 if (ioat->res == NULL) { 738 ioat_log_message(0, "bus_alloc_resource failed\n"); 739 return (ENOMEM); 740 } 741 742 ioat->tag = NULL; 743 error = bus_setup_intr(ioat->device, ioat->res, INTR_MPSAFE | 744 INTR_TYPE_MISC, NULL, ioat_interrupt_handler, ioat, &ioat->tag); 745 if (error != 0) { 746 ioat_log_message(0, "bus_setup_intr failed\n"); 747 return (error); 748 } 749 750 ioat_write_intrctrl(ioat, IOAT_INTRCTRL_MASTER_INT_EN); 751 return (0); 752 } 753 754 static boolean_t 755 ioat_model_resets_msix(struct ioat_softc *ioat) 756 { 757 u_int32_t pciid; 758 759 pciid = pci_get_devid(ioat->device); 760 switch (pciid) { 761 /* BWD: */ 762 case 0x0c508086: 763 case 0x0c518086: 764 case 0x0c528086: 765 case 0x0c538086: 766 /* BDXDE: */ 767 case 0x6f508086: 768 case 0x6f518086: 769 case 0x6f528086: 770 case 0x6f538086: 771 return (TRUE); 772 } 773 774 return (FALSE); 775 } 776 777 static void 778 ioat_interrupt_handler(void *arg) 779 { 780 struct ioat_softc *ioat = arg; 781 782 ioat->stats.interrupts++; 783 ioat_process_events(ioat, TRUE); 784 } 785 786 static int 787 chanerr_to_errno(uint32_t chanerr) 788 { 789 790 if (chanerr == 0) 791 return (0); 792 if ((chanerr & (IOAT_CHANERR_XSADDERR | IOAT_CHANERR_XDADDERR)) != 0) 793 return (EFAULT); 794 if ((chanerr & (IOAT_CHANERR_RDERR | IOAT_CHANERR_WDERR)) != 0) 795 return (EIO); 796 /* This one is probably our fault: */ 797 if ((chanerr & IOAT_CHANERR_NDADDERR) != 0) 798 return (EIO); 799 return (EIO); 800 } 801 802 static void 803 ioat_process_events(struct ioat_softc *ioat, boolean_t intr) 804 { 805 struct ioat_descriptor *desc; 806 struct bus_dmadesc *dmadesc; 807 uint64_t comp_update, status; 808 uint32_t completed, chanerr; 809 int error __diagused; 810 811 if (intr) { 812 mtx_lock(&ioat->cleanup_lock); 813 } else { 814 if (!mtx_trylock(&ioat->cleanup_lock)) 815 return; 816 } 817 818 /* 819 * Don't run while the hardware is being reset. Reset is responsible 820 * for blocking new work and draining & completing existing work, so 821 * there is nothing to do until new work is queued after reset anyway. 822 */ 823 if (ioat->resetting_cleanup) { 824 mtx_unlock(&ioat->cleanup_lock); 825 return; 826 } 827 828 completed = 0; 829 comp_update = *ioat->comp_update; 830 status = comp_update & IOAT_CHANSTS_COMPLETED_DESCRIPTOR_MASK; 831 832 if (status < ioat->hw_desc_bus_addr || 833 status >= ioat->hw_desc_bus_addr + (1 << ioat->ring_size_order) * 834 sizeof(struct ioat_generic_hw_descriptor)) 835 panic("Bogus completion address %jx (channel %u)", 836 (uintmax_t)status, ioat->chan_idx); 837 838 if (status == ioat->last_seen) { 839 /* 840 * If we landed in process_events and nothing has been 841 * completed, check for a timeout due to channel halt. 842 */ 843 goto out; 844 } 845 CTR4(KTR_IOAT, "%s channel=%u hw_status=0x%lx last_seen=0x%lx", 846 __func__, ioat->chan_idx, comp_update, ioat->last_seen); 847 848 while (RING_PHYS_ADDR(ioat, ioat->tail - 1) != status) { 849 desc = ioat_get_ring_entry(ioat, ioat->tail); 850 dmadesc = &desc->bus_dmadesc; 851 CTR5(KTR_IOAT, "channel=%u completing desc idx %u (%p) ok cb %p(%p)", 852 ioat->chan_idx, ioat->tail, dmadesc, dmadesc->callback_fn, 853 dmadesc->callback_arg); 854 855 bus_dmamap_unload(ioat->data_tag, desc->src_dmamap); 856 bus_dmamap_unload(ioat->data_tag, desc->dst_dmamap); 857 bus_dmamap_unload(ioat->data_tag, desc->src2_dmamap); 858 bus_dmamap_unload(ioat->data_tag, desc->dst2_dmamap); 859 860 if (dmadesc->callback_fn != NULL) 861 dmadesc->callback_fn(dmadesc->callback_arg, 0); 862 863 completed++; 864 ioat->tail++; 865 } 866 CTR5(KTR_IOAT, "%s channel=%u head=%u tail=%u active=%u", __func__, 867 ioat->chan_idx, ioat->head, ioat->tail, ioat_get_active(ioat)); 868 869 if (completed != 0) { 870 ioat->last_seen = RING_PHYS_ADDR(ioat, ioat->tail - 1); 871 ioat->stats.descriptors_processed += completed; 872 wakeup(&ioat->tail); 873 } 874 875 out: 876 ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN); 877 mtx_unlock(&ioat->cleanup_lock); 878 879 /* 880 * The device doesn't seem to reliably push suspend/halt statuses to 881 * the channel completion memory address, so poll the device register 882 * here. For performance reasons skip it on interrupts, do it only 883 * on much more rare polling events. 884 */ 885 if (!intr) 886 comp_update = ioat_get_chansts(ioat) & IOAT_CHANSTS_STATUS; 887 if (!is_ioat_halted(comp_update) && !is_ioat_suspended(comp_update)) 888 return; 889 890 ioat->stats.channel_halts++; 891 892 /* 893 * Fatal programming error on this DMA channel. Flush any outstanding 894 * work with error status and restart the engine. 895 */ 896 mtx_lock(&ioat->submit_lock); 897 ioat->quiescing = TRUE; 898 mtx_unlock(&ioat->submit_lock); 899 900 /* 901 * This is safe to do here because the submit queue is quiesced. We 902 * know that we will drain all outstanding events, so ioat_reset_hw 903 * can't deadlock. It is necessary to protect other ioat_process_event 904 * threads from racing ioat_reset_hw, reading an indeterminate hw 905 * state, and attempting to continue issuing completions. 906 */ 907 mtx_lock(&ioat->cleanup_lock); 908 ioat->resetting_cleanup = TRUE; 909 910 chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 911 if (1 <= g_ioat_debug_level) 912 ioat_halted_debug(ioat, chanerr); 913 ioat->stats.last_halt_chanerr = chanerr; 914 915 while (ioat_get_active(ioat) > 0) { 916 desc = ioat_get_ring_entry(ioat, ioat->tail); 917 dmadesc = &desc->bus_dmadesc; 918 CTR5(KTR_IOAT, "channel=%u completing desc idx %u (%p) err cb %p(%p)", 919 ioat->chan_idx, ioat->tail, dmadesc, dmadesc->callback_fn, 920 dmadesc->callback_arg); 921 922 if (dmadesc->callback_fn != NULL) 923 dmadesc->callback_fn(dmadesc->callback_arg, 924 chanerr_to_errno(chanerr)); 925 926 ioat->tail++; 927 ioat->stats.descriptors_processed++; 928 ioat->stats.descriptors_error++; 929 } 930 CTR5(KTR_IOAT, "%s channel=%u head=%u tail=%u active=%u", __func__, 931 ioat->chan_idx, ioat->head, ioat->tail, ioat_get_active(ioat)); 932 933 /* Clear error status */ 934 ioat_write_4(ioat, IOAT_CHANERR_OFFSET, chanerr); 935 936 mtx_unlock(&ioat->cleanup_lock); 937 938 ioat_log_message(0, "Resetting channel to recover from error\n"); 939 error = taskqueue_enqueue(taskqueue_thread, &ioat->reset_task); 940 KASSERT(error == 0, 941 ("%s: taskqueue_enqueue failed: %d", __func__, error)); 942 } 943 944 static void 945 ioat_reset_hw_task(void *ctx, int pending __unused) 946 { 947 struct ioat_softc *ioat; 948 int error __diagused; 949 950 ioat = ctx; 951 ioat_log_message(1, "%s: Resetting channel\n", __func__); 952 953 error = ioat_reset_hw(ioat); 954 KASSERT(error == 0, ("%s: reset failed: %d", __func__, error)); 955 } 956 957 /* 958 * User API functions 959 */ 960 unsigned 961 ioat_get_nchannels(void) 962 { 963 964 return (ioat_channel_index); 965 } 966 967 bus_dmaengine_t 968 ioat_get_dmaengine(uint32_t index, int flags) 969 { 970 struct ioat_softc *ioat; 971 972 KASSERT((flags & ~(M_NOWAIT | M_WAITOK)) == 0, 973 ("invalid flags: 0x%08x", flags)); 974 KASSERT((flags & (M_NOWAIT | M_WAITOK)) != (M_NOWAIT | M_WAITOK), 975 ("invalid wait | nowait")); 976 977 mtx_lock(&ioat_list_mtx); 978 if (index >= ioat_channel_index || 979 (ioat = ioat_channel[index]) == NULL) { 980 mtx_unlock(&ioat_list_mtx); 981 return (NULL); 982 } 983 mtx_lock(&ioat->submit_lock); 984 mtx_unlock(&ioat_list_mtx); 985 986 if (ioat->destroying) { 987 mtx_unlock(&ioat->submit_lock); 988 return (NULL); 989 } 990 991 ioat_get(ioat); 992 if (ioat->quiescing) { 993 if ((flags & M_NOWAIT) != 0) { 994 ioat_put(ioat); 995 mtx_unlock(&ioat->submit_lock); 996 return (NULL); 997 } 998 999 while (ioat->quiescing && !ioat->destroying) 1000 msleep(&ioat->quiescing, &ioat->submit_lock, 0, "getdma", 0); 1001 1002 if (ioat->destroying) { 1003 ioat_put(ioat); 1004 mtx_unlock(&ioat->submit_lock); 1005 return (NULL); 1006 } 1007 } 1008 mtx_unlock(&ioat->submit_lock); 1009 return (&ioat->dmaengine); 1010 } 1011 1012 void 1013 ioat_put_dmaengine(bus_dmaengine_t dmaengine) 1014 { 1015 struct ioat_softc *ioat; 1016 1017 ioat = to_ioat_softc(dmaengine); 1018 mtx_lock(&ioat->submit_lock); 1019 ioat_put(ioat); 1020 mtx_unlock(&ioat->submit_lock); 1021 } 1022 1023 int 1024 ioat_get_hwversion(bus_dmaengine_t dmaengine) 1025 { 1026 struct ioat_softc *ioat; 1027 1028 ioat = to_ioat_softc(dmaengine); 1029 return (ioat->version); 1030 } 1031 1032 size_t 1033 ioat_get_max_io_size(bus_dmaengine_t dmaengine) 1034 { 1035 struct ioat_softc *ioat; 1036 1037 ioat = to_ioat_softc(dmaengine); 1038 return (ioat->max_xfer_size); 1039 } 1040 1041 uint32_t 1042 ioat_get_capabilities(bus_dmaengine_t dmaengine) 1043 { 1044 struct ioat_softc *ioat; 1045 1046 ioat = to_ioat_softc(dmaengine); 1047 return (ioat->capabilities); 1048 } 1049 1050 int 1051 ioat_get_domain(bus_dmaengine_t dmaengine, int *domain) 1052 { 1053 struct ioat_softc *ioat; 1054 1055 ioat = to_ioat_softc(dmaengine); 1056 return (bus_get_domain(ioat->device, domain)); 1057 } 1058 1059 int 1060 ioat_set_interrupt_coalesce(bus_dmaengine_t dmaengine, uint16_t delay) 1061 { 1062 struct ioat_softc *ioat; 1063 1064 ioat = to_ioat_softc(dmaengine); 1065 if (!ioat->intrdelay_supported) 1066 return (ENODEV); 1067 if (delay > ioat->intrdelay_max) 1068 return (ERANGE); 1069 1070 ioat_write_2(ioat, IOAT_INTRDELAY_OFFSET, delay); 1071 ioat->cached_intrdelay = 1072 ioat_read_2(ioat, IOAT_INTRDELAY_OFFSET) & IOAT_INTRDELAY_US_MASK; 1073 return (0); 1074 } 1075 1076 uint16_t 1077 ioat_get_max_coalesce_period(bus_dmaengine_t dmaengine) 1078 { 1079 struct ioat_softc *ioat; 1080 1081 ioat = to_ioat_softc(dmaengine); 1082 return (ioat->intrdelay_max); 1083 } 1084 1085 void 1086 ioat_acquire(bus_dmaengine_t dmaengine) 1087 { 1088 struct ioat_softc *ioat; 1089 1090 ioat = to_ioat_softc(dmaengine); 1091 mtx_lock(&ioat->submit_lock); 1092 CTR2(KTR_IOAT, "%s channel=%u", __func__, ioat->chan_idx); 1093 ioat->acq_head = ioat->head; 1094 } 1095 1096 int 1097 ioat_acquire_reserve(bus_dmaengine_t dmaengine, unsigned n, int mflags) 1098 { 1099 struct ioat_softc *ioat; 1100 int error; 1101 1102 ioat = to_ioat_softc(dmaengine); 1103 ioat_acquire(dmaengine); 1104 1105 error = ioat_reserve_space(ioat, n, mflags); 1106 if (error != 0) 1107 ioat_release(dmaengine); 1108 return (error); 1109 } 1110 1111 void 1112 ioat_release(bus_dmaengine_t dmaengine) 1113 { 1114 struct ioat_softc *ioat; 1115 1116 ioat = to_ioat_softc(dmaengine); 1117 CTR3(KTR_IOAT, "%s channel=%u dispatch1 head=%u", __func__, 1118 ioat->chan_idx, ioat->head); 1119 KFAIL_POINT_CODE(DEBUG_FP, ioat_release, /* do nothing */); 1120 CTR3(KTR_IOAT, "%s channel=%u dispatch2 head=%u", __func__, 1121 ioat->chan_idx, ioat->head); 1122 1123 if (ioat->acq_head != ioat->head) { 1124 ioat_write_2(ioat, IOAT_DMACOUNT_OFFSET, 1125 (uint16_t)ioat->head); 1126 1127 if (!callout_pending(&ioat->poll_timer)) { 1128 callout_reset_on(&ioat->poll_timer, 1, 1129 ioat_poll_timer_callback, ioat, ioat->cpu); 1130 } 1131 } 1132 mtx_unlock(&ioat->submit_lock); 1133 } 1134 1135 static struct ioat_descriptor * 1136 ioat_op_generic(struct ioat_softc *ioat, uint8_t op, 1137 uint32_t size, uint64_t src, uint64_t dst, 1138 bus_dmaengine_callback_t callback_fn, void *callback_arg, 1139 uint32_t flags) 1140 { 1141 struct ioat_generic_hw_descriptor *hw_desc; 1142 struct ioat_descriptor *desc; 1143 bus_dma_segment_t seg; 1144 int mflags, nseg, error; 1145 1146 mtx_assert(&ioat->submit_lock, MA_OWNED); 1147 1148 KASSERT((flags & ~_DMA_GENERIC_FLAGS) == 0, 1149 ("Unrecognized flag(s): %#x", flags & ~_DMA_GENERIC_FLAGS)); 1150 KASSERT(size <= ioat->max_xfer_size, ("%s: size too big (%u > %u)", 1151 __func__, (unsigned)size, ioat->max_xfer_size)); 1152 1153 if ((flags & DMA_NO_WAIT) != 0) 1154 mflags = M_NOWAIT; 1155 else 1156 mflags = M_WAITOK; 1157 1158 if (ioat_reserve_space(ioat, 1, mflags) != 0) 1159 return (NULL); 1160 1161 desc = ioat_get_ring_entry(ioat, ioat->head); 1162 hw_desc = &ioat_get_descriptor(ioat, ioat->head)->generic; 1163 1164 hw_desc->u.control_raw = 0; 1165 hw_desc->u.control_generic.op = op; 1166 hw_desc->u.control_generic.completion_update = 1; 1167 1168 if ((flags & DMA_INT_EN) != 0) 1169 hw_desc->u.control_generic.int_enable = 1; 1170 if ((flags & DMA_FENCE) != 0) 1171 hw_desc->u.control_generic.fence = 1; 1172 1173 hw_desc->size = size; 1174 1175 if (src != 0) { 1176 nseg = -1; 1177 error = _bus_dmamap_load_phys(ioat->data_tag, desc->src_dmamap, 1178 src, size, 0, &seg, &nseg); 1179 if (error != 0) { 1180 ioat_log_message(0, "%s: _bus_dmamap_load_phys" 1181 " failed %d\n", __func__, error); 1182 return (NULL); 1183 } 1184 hw_desc->src_addr = seg.ds_addr; 1185 } 1186 1187 if (dst != 0) { 1188 nseg = -1; 1189 error = _bus_dmamap_load_phys(ioat->data_tag, desc->dst_dmamap, 1190 dst, size, 0, &seg, &nseg); 1191 if (error != 0) { 1192 ioat_log_message(0, "%s: _bus_dmamap_load_phys" 1193 " failed %d\n", __func__, error); 1194 return (NULL); 1195 } 1196 hw_desc->dest_addr = seg.ds_addr; 1197 } 1198 1199 desc->bus_dmadesc.callback_fn = callback_fn; 1200 desc->bus_dmadesc.callback_arg = callback_arg; 1201 return (desc); 1202 } 1203 1204 struct bus_dmadesc * 1205 ioat_null(bus_dmaengine_t dmaengine, bus_dmaengine_callback_t callback_fn, 1206 void *callback_arg, uint32_t flags) 1207 { 1208 struct ioat_dma_hw_descriptor *hw_desc; 1209 struct ioat_descriptor *desc; 1210 struct ioat_softc *ioat; 1211 1212 ioat = to_ioat_softc(dmaengine); 1213 CTR2(KTR_IOAT, "%s channel=%u", __func__, ioat->chan_idx); 1214 1215 desc = ioat_op_generic(ioat, IOAT_OP_COPY, 8, 0, 0, callback_fn, 1216 callback_arg, flags); 1217 if (desc == NULL) 1218 return (NULL); 1219 1220 hw_desc = &ioat_get_descriptor(ioat, desc->id)->dma; 1221 hw_desc->u.control.null = 1; 1222 ioat_submit_single(ioat); 1223 return (&desc->bus_dmadesc); 1224 } 1225 1226 struct bus_dmadesc * 1227 ioat_copy(bus_dmaengine_t dmaengine, bus_addr_t dst, 1228 bus_addr_t src, bus_size_t len, bus_dmaengine_callback_t callback_fn, 1229 void *callback_arg, uint32_t flags) 1230 { 1231 struct ioat_dma_hw_descriptor *hw_desc; 1232 struct ioat_descriptor *desc; 1233 struct ioat_softc *ioat; 1234 1235 ioat = to_ioat_softc(dmaengine); 1236 desc = ioat_op_generic(ioat, IOAT_OP_COPY, len, src, dst, callback_fn, 1237 callback_arg, flags); 1238 if (desc == NULL) 1239 return (NULL); 1240 1241 hw_desc = &ioat_get_descriptor(ioat, desc->id)->dma; 1242 if (g_ioat_debug_level >= 3) 1243 dump_descriptor(hw_desc); 1244 1245 ioat_submit_single(ioat); 1246 CTR6(KTR_IOAT, "%s channel=%u desc=%p dest=%lx src=%lx len=%lx", 1247 __func__, ioat->chan_idx, &desc->bus_dmadesc, dst, src, len); 1248 return (&desc->bus_dmadesc); 1249 } 1250 1251 struct bus_dmadesc * 1252 ioat_copy_8k_aligned(bus_dmaengine_t dmaengine, bus_addr_t dst1, 1253 bus_addr_t dst2, bus_addr_t src1, bus_addr_t src2, 1254 bus_dmaengine_callback_t callback_fn, void *callback_arg, uint32_t flags) 1255 { 1256 struct ioat_dma_hw_descriptor *hw_desc; 1257 struct ioat_descriptor *desc; 1258 struct ioat_softc *ioat; 1259 bus_size_t src1_len, dst1_len; 1260 bus_dma_segment_t seg; 1261 int nseg, error; 1262 1263 ioat = to_ioat_softc(dmaengine); 1264 CTR2(KTR_IOAT, "%s channel=%u", __func__, ioat->chan_idx); 1265 1266 KASSERT(((src1 | src2 | dst1 | dst2) & PAGE_MASK) == 0, 1267 ("%s: addresses are not page-aligned", __func__)); 1268 1269 desc = ioat_op_generic(ioat, IOAT_OP_COPY, 2 * PAGE_SIZE, 0, 0, 1270 callback_fn, callback_arg, flags); 1271 if (desc == NULL) 1272 return (NULL); 1273 1274 hw_desc = &ioat_get_descriptor(ioat, desc->id)->dma; 1275 1276 src1_len = (src2 != src1 + PAGE_SIZE) ? PAGE_SIZE : 2 * PAGE_SIZE; 1277 nseg = -1; 1278 error = _bus_dmamap_load_phys(ioat->data_tag, 1279 desc->src_dmamap, src1, src1_len, 0, &seg, &nseg); 1280 if (error != 0) { 1281 ioat_log_message(0, "%s: _bus_dmamap_load_phys" 1282 " failed %d\n", __func__, error); 1283 return (NULL); 1284 } 1285 hw_desc->src_addr = seg.ds_addr; 1286 if (src1_len != 2 * PAGE_SIZE) { 1287 hw_desc->u.control.src_page_break = 1; 1288 nseg = -1; 1289 error = _bus_dmamap_load_phys(ioat->data_tag, 1290 desc->src2_dmamap, src2, PAGE_SIZE, 0, &seg, &nseg); 1291 if (error != 0) { 1292 ioat_log_message(0, "%s: _bus_dmamap_load_phys" 1293 " failed %d\n", __func__, error); 1294 return (NULL); 1295 } 1296 hw_desc->next_src_addr = seg.ds_addr; 1297 } 1298 1299 dst1_len = (dst2 != dst1 + PAGE_SIZE) ? PAGE_SIZE : 2 * PAGE_SIZE; 1300 nseg = -1; 1301 error = _bus_dmamap_load_phys(ioat->data_tag, 1302 desc->dst_dmamap, dst1, dst1_len, 0, &seg, &nseg); 1303 if (error != 0) { 1304 ioat_log_message(0, "%s: _bus_dmamap_load_phys" 1305 " failed %d\n", __func__, error); 1306 return (NULL); 1307 } 1308 hw_desc->dest_addr = seg.ds_addr; 1309 if (dst1_len != 2 * PAGE_SIZE) { 1310 hw_desc->u.control.dest_page_break = 1; 1311 nseg = -1; 1312 error = _bus_dmamap_load_phys(ioat->data_tag, 1313 desc->dst2_dmamap, dst2, PAGE_SIZE, 0, &seg, &nseg); 1314 if (error != 0) { 1315 ioat_log_message(0, "%s: _bus_dmamap_load_phys" 1316 " failed %d\n", __func__, error); 1317 return (NULL); 1318 } 1319 hw_desc->next_dest_addr = seg.ds_addr; 1320 } 1321 1322 if (g_ioat_debug_level >= 3) 1323 dump_descriptor(hw_desc); 1324 1325 ioat_submit_single(ioat); 1326 return (&desc->bus_dmadesc); 1327 } 1328 1329 struct bus_dmadesc * 1330 ioat_copy_crc(bus_dmaengine_t dmaengine, bus_addr_t dst, bus_addr_t src, 1331 bus_size_t len, uint32_t *initialseed, bus_addr_t crcptr, 1332 bus_dmaengine_callback_t callback_fn, void *callback_arg, uint32_t flags) 1333 { 1334 struct ioat_crc32_hw_descriptor *hw_desc; 1335 struct ioat_descriptor *desc; 1336 struct ioat_softc *ioat; 1337 uint32_t teststore; 1338 uint8_t op; 1339 bus_dma_segment_t seg; 1340 int nseg, error; 1341 1342 ioat = to_ioat_softc(dmaengine); 1343 CTR2(KTR_IOAT, "%s channel=%u", __func__, ioat->chan_idx); 1344 1345 KASSERT((ioat->capabilities & IOAT_DMACAP_MOVECRC) != 0, 1346 ("%s: device lacks MOVECRC capability", __func__)); 1347 teststore = (flags & _DMA_CRC_TESTSTORE); 1348 KASSERT(teststore != _DMA_CRC_TESTSTORE, 1349 ("%s: TEST and STORE invalid", __func__)); 1350 KASSERT(teststore != 0 || (flags & DMA_CRC_INLINE) == 0, 1351 ("%s: INLINE invalid without TEST or STORE", __func__)); 1352 1353 switch (teststore) { 1354 case DMA_CRC_STORE: 1355 op = IOAT_OP_MOVECRC_STORE; 1356 break; 1357 case DMA_CRC_TEST: 1358 op = IOAT_OP_MOVECRC_TEST; 1359 break; 1360 default: 1361 KASSERT(teststore == 0, ("bogus")); 1362 op = IOAT_OP_MOVECRC; 1363 break; 1364 } 1365 1366 desc = ioat_op_generic(ioat, op, len, src, dst, callback_fn, 1367 callback_arg, flags & ~_DMA_CRC_FLAGS); 1368 if (desc == NULL) 1369 return (NULL); 1370 1371 hw_desc = &ioat_get_descriptor(ioat, desc->id)->crc32; 1372 1373 if ((flags & DMA_CRC_INLINE) == 0) { 1374 nseg = -1; 1375 error = _bus_dmamap_load_phys(ioat->data_tag, 1376 desc->dst2_dmamap, crcptr, sizeof(uint32_t), 0, 1377 &seg, &nseg); 1378 if (error != 0) { 1379 ioat_log_message(0, "%s: _bus_dmamap_load_phys" 1380 " failed %d\n", __func__, error); 1381 return (NULL); 1382 } 1383 hw_desc->crc_address = seg.ds_addr; 1384 } else 1385 hw_desc->u.control.crc_location = 1; 1386 1387 if (initialseed != NULL) { 1388 hw_desc->u.control.use_seed = 1; 1389 hw_desc->seed = *initialseed; 1390 } 1391 1392 if (g_ioat_debug_level >= 3) 1393 dump_descriptor(hw_desc); 1394 1395 ioat_submit_single(ioat); 1396 return (&desc->bus_dmadesc); 1397 } 1398 1399 struct bus_dmadesc * 1400 ioat_crc(bus_dmaengine_t dmaengine, bus_addr_t src, bus_size_t len, 1401 uint32_t *initialseed, bus_addr_t crcptr, 1402 bus_dmaengine_callback_t callback_fn, void *callback_arg, uint32_t flags) 1403 { 1404 struct ioat_crc32_hw_descriptor *hw_desc; 1405 struct ioat_descriptor *desc; 1406 struct ioat_softc *ioat; 1407 uint32_t teststore; 1408 uint8_t op; 1409 bus_dma_segment_t seg; 1410 int nseg, error; 1411 1412 ioat = to_ioat_softc(dmaengine); 1413 CTR2(KTR_IOAT, "%s channel=%u", __func__, ioat->chan_idx); 1414 1415 KASSERT((ioat->capabilities & IOAT_DMACAP_CRC) != 0, 1416 ("%s: device lacks CRC capability", __func__)); 1417 teststore = (flags & _DMA_CRC_TESTSTORE); 1418 KASSERT(teststore != _DMA_CRC_TESTSTORE, 1419 ("%s: TEST and STORE invalid", __func__)); 1420 KASSERT(teststore != 0 || (flags & DMA_CRC_INLINE) == 0, 1421 ("%s: INLINE invalid without TEST or STORE", __func__)); 1422 1423 switch (teststore) { 1424 case DMA_CRC_STORE: 1425 op = IOAT_OP_CRC_STORE; 1426 break; 1427 case DMA_CRC_TEST: 1428 op = IOAT_OP_CRC_TEST; 1429 break; 1430 default: 1431 KASSERT(teststore == 0, ("bogus")); 1432 op = IOAT_OP_CRC; 1433 break; 1434 } 1435 1436 desc = ioat_op_generic(ioat, op, len, src, 0, callback_fn, 1437 callback_arg, flags & ~_DMA_CRC_FLAGS); 1438 if (desc == NULL) 1439 return (NULL); 1440 1441 hw_desc = &ioat_get_descriptor(ioat, desc->id)->crc32; 1442 1443 if ((flags & DMA_CRC_INLINE) == 0) { 1444 nseg = -1; 1445 error = _bus_dmamap_load_phys(ioat->data_tag, 1446 desc->dst2_dmamap, crcptr, sizeof(uint32_t), 0, 1447 &seg, &nseg); 1448 if (error != 0) { 1449 ioat_log_message(0, "%s: _bus_dmamap_load_phys" 1450 " failed %d\n", __func__, error); 1451 return (NULL); 1452 } 1453 hw_desc->crc_address = seg.ds_addr; 1454 } else 1455 hw_desc->u.control.crc_location = 1; 1456 1457 if (initialseed != NULL) { 1458 hw_desc->u.control.use_seed = 1; 1459 hw_desc->seed = *initialseed; 1460 } 1461 1462 if (g_ioat_debug_level >= 3) 1463 dump_descriptor(hw_desc); 1464 1465 ioat_submit_single(ioat); 1466 return (&desc->bus_dmadesc); 1467 } 1468 1469 struct bus_dmadesc * 1470 ioat_blockfill(bus_dmaengine_t dmaengine, bus_addr_t dst, uint64_t fillpattern, 1471 bus_size_t len, bus_dmaengine_callback_t callback_fn, void *callback_arg, 1472 uint32_t flags) 1473 { 1474 struct ioat_fill_hw_descriptor *hw_desc; 1475 struct ioat_descriptor *desc; 1476 struct ioat_softc *ioat; 1477 1478 ioat = to_ioat_softc(dmaengine); 1479 CTR2(KTR_IOAT, "%s channel=%u", __func__, ioat->chan_idx); 1480 1481 KASSERT((ioat->capabilities & IOAT_DMACAP_BFILL) != 0, 1482 ("%s: device lacks BFILL capability", __func__)); 1483 1484 desc = ioat_op_generic(ioat, IOAT_OP_FILL, len, 0, dst, 1485 callback_fn, callback_arg, flags); 1486 if (desc == NULL) 1487 return (NULL); 1488 1489 hw_desc = &ioat_get_descriptor(ioat, desc->id)->fill; 1490 hw_desc->src_data = fillpattern; 1491 if (g_ioat_debug_level >= 3) 1492 dump_descriptor(hw_desc); 1493 1494 ioat_submit_single(ioat); 1495 return (&desc->bus_dmadesc); 1496 } 1497 1498 /* 1499 * Ring Management 1500 */ 1501 static inline uint32_t 1502 ioat_get_active(struct ioat_softc *ioat) 1503 { 1504 1505 return ((ioat->head - ioat->tail) & ((1 << ioat->ring_size_order) - 1)); 1506 } 1507 1508 static inline uint32_t 1509 ioat_get_ring_space(struct ioat_softc *ioat) 1510 { 1511 1512 return ((1 << ioat->ring_size_order) - ioat_get_active(ioat) - 1); 1513 } 1514 1515 /* 1516 * Reserves space in this IOAT descriptor ring by ensuring enough slots remain 1517 * for 'num_descs'. 1518 * 1519 * If mflags contains M_WAITOK, blocks until enough space is available. 1520 * 1521 * Returns zero on success, or an errno on error. If num_descs is beyond the 1522 * maximum ring size, returns EINVAl; if allocation would block and mflags 1523 * contains M_NOWAIT, returns EAGAIN. 1524 * 1525 * Must be called with the submit_lock held; returns with the lock held. The 1526 * lock may be dropped to allocate the ring. 1527 * 1528 * (The submit_lock is needed to add any entries to the ring, so callers are 1529 * assured enough room is available.) 1530 */ 1531 static int 1532 ioat_reserve_space(struct ioat_softc *ioat, uint32_t num_descs, int mflags) 1533 { 1534 boolean_t dug; 1535 int error; 1536 1537 mtx_assert(&ioat->submit_lock, MA_OWNED); 1538 error = 0; 1539 dug = FALSE; 1540 1541 if (num_descs < 1 || num_descs >= (1 << ioat->ring_size_order)) { 1542 error = EINVAL; 1543 goto out; 1544 } 1545 1546 for (;;) { 1547 if (ioat->quiescing) { 1548 error = ENXIO; 1549 goto out; 1550 } 1551 1552 if (ioat_get_ring_space(ioat) >= num_descs) 1553 goto out; 1554 1555 CTR3(KTR_IOAT, "%s channel=%u starved (%u)", __func__, 1556 ioat->chan_idx, num_descs); 1557 1558 if (!dug && !ioat->is_submitter_processing) { 1559 ioat->is_submitter_processing = TRUE; 1560 mtx_unlock(&ioat->submit_lock); 1561 1562 CTR2(KTR_IOAT, "%s channel=%u attempting to process events", 1563 __func__, ioat->chan_idx); 1564 ioat_process_events(ioat, FALSE); 1565 1566 mtx_lock(&ioat->submit_lock); 1567 dug = TRUE; 1568 KASSERT(ioat->is_submitter_processing == TRUE, 1569 ("is_submitter_processing")); 1570 ioat->is_submitter_processing = FALSE; 1571 wakeup(&ioat->tail); 1572 continue; 1573 } 1574 1575 if ((mflags & M_WAITOK) == 0) { 1576 error = EAGAIN; 1577 break; 1578 } 1579 CTR2(KTR_IOAT, "%s channel=%u blocking on completions", 1580 __func__, ioat->chan_idx); 1581 msleep(&ioat->tail, &ioat->submit_lock, 0, 1582 "ioat_full", 0); 1583 continue; 1584 } 1585 1586 out: 1587 mtx_assert(&ioat->submit_lock, MA_OWNED); 1588 KASSERT(!ioat->quiescing || error == ENXIO, 1589 ("reserved during quiesce")); 1590 return (error); 1591 } 1592 1593 static void 1594 ioat_free_ring(struct ioat_softc *ioat, uint32_t size, 1595 struct ioat_descriptor *ring) 1596 { 1597 1598 free(ring, M_IOAT); 1599 } 1600 1601 static struct ioat_descriptor * 1602 ioat_get_ring_entry(struct ioat_softc *ioat, uint32_t index) 1603 { 1604 1605 return (&ioat->ring[index % (1 << ioat->ring_size_order)]); 1606 } 1607 1608 static union ioat_hw_descriptor * 1609 ioat_get_descriptor(struct ioat_softc *ioat, uint32_t index) 1610 { 1611 1612 return (&ioat->hw_desc_ring[index % (1 << ioat->ring_size_order)]); 1613 } 1614 1615 static void 1616 ioat_halted_debug(struct ioat_softc *ioat, uint32_t chanerr) 1617 { 1618 union ioat_hw_descriptor *desc; 1619 1620 ioat_log_message(0, "Channel halted (%b)\n", (int)chanerr, 1621 IOAT_CHANERR_STR); 1622 if (chanerr == 0) 1623 return; 1624 1625 mtx_assert(&ioat->cleanup_lock, MA_OWNED); 1626 1627 desc = ioat_get_descriptor(ioat, ioat->tail + 0); 1628 dump_descriptor(desc); 1629 1630 desc = ioat_get_descriptor(ioat, ioat->tail + 1); 1631 dump_descriptor(desc); 1632 } 1633 1634 static void 1635 ioat_poll_timer_callback(void *arg) 1636 { 1637 struct ioat_softc *ioat; 1638 1639 ioat = arg; 1640 CTR1(KTR_IOAT, "%s", __func__); 1641 1642 ioat_process_events(ioat, FALSE); 1643 1644 mtx_lock(&ioat->submit_lock); 1645 if (ioat_get_active(ioat) > 0) 1646 callout_schedule(&ioat->poll_timer, 1); 1647 mtx_unlock(&ioat->submit_lock); 1648 } 1649 1650 /* 1651 * Support Functions 1652 */ 1653 static void 1654 ioat_submit_single(struct ioat_softc *ioat) 1655 { 1656 1657 mtx_assert(&ioat->submit_lock, MA_OWNED); 1658 1659 ioat->head++; 1660 CTR4(KTR_IOAT, "%s channel=%u head=%u tail=%u", __func__, 1661 ioat->chan_idx, ioat->head, ioat->tail); 1662 1663 ioat->stats.descriptors_submitted++; 1664 } 1665 1666 static int 1667 ioat_reset_hw(struct ioat_softc *ioat) 1668 { 1669 uint64_t status; 1670 uint32_t chanerr; 1671 unsigned timeout; 1672 int error; 1673 1674 CTR2(KTR_IOAT, "%s channel=%u", __func__, ioat->chan_idx); 1675 1676 mtx_lock(&ioat->submit_lock); 1677 while (ioat->resetting && !ioat->destroying) 1678 msleep(&ioat->resetting, &ioat->submit_lock, 0, "IRH_drain", 0); 1679 if (ioat->destroying) { 1680 mtx_unlock(&ioat->submit_lock); 1681 return (ENXIO); 1682 } 1683 ioat->resetting = TRUE; 1684 ioat->quiescing = TRUE; 1685 mtx_unlock(&ioat->submit_lock); 1686 mtx_lock(&ioat->cleanup_lock); 1687 while (ioat_get_active(ioat) > 0) 1688 msleep(&ioat->tail, &ioat->cleanup_lock, 0, "ioat_drain", 1); 1689 1690 /* 1691 * Suspend ioat_process_events while the hardware and softc are in an 1692 * indeterminate state. 1693 */ 1694 ioat->resetting_cleanup = TRUE; 1695 mtx_unlock(&ioat->cleanup_lock); 1696 1697 CTR2(KTR_IOAT, "%s channel=%u quiesced and drained", __func__, 1698 ioat->chan_idx); 1699 1700 status = ioat_get_chansts(ioat); 1701 if (is_ioat_active(status) || is_ioat_idle(status)) 1702 ioat_suspend(ioat); 1703 1704 /* Wait at most 20 ms */ 1705 for (timeout = 0; (is_ioat_active(status) || is_ioat_idle(status)) && 1706 timeout < 20; timeout++) { 1707 DELAY(1000); 1708 status = ioat_get_chansts(ioat); 1709 } 1710 if (timeout == 20) { 1711 error = ETIMEDOUT; 1712 goto out; 1713 } 1714 1715 KASSERT(ioat_get_active(ioat) == 0, ("active after quiesce")); 1716 1717 chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 1718 ioat_write_4(ioat, IOAT_CHANERR_OFFSET, chanerr); 1719 1720 CTR2(KTR_IOAT, "%s channel=%u hardware suspended", __func__, 1721 ioat->chan_idx); 1722 1723 /* 1724 * IOAT v3 workaround - CHANERRMSK_INT with 3E07h to masks out errors 1725 * that can cause stability issues for IOAT v3. 1726 */ 1727 pci_write_config(ioat->device, IOAT_CFG_CHANERRMASK_INT_OFFSET, 0x3e07, 1728 4); 1729 chanerr = pci_read_config(ioat->device, IOAT_CFG_CHANERR_INT_OFFSET, 4); 1730 pci_write_config(ioat->device, IOAT_CFG_CHANERR_INT_OFFSET, chanerr, 4); 1731 1732 /* 1733 * BDXDE and BWD models reset MSI-X registers on device reset. 1734 * Save/restore their contents manually. 1735 */ 1736 if (ioat_model_resets_msix(ioat)) { 1737 ioat_log_message(1, "device resets MSI-X registers; saving\n"); 1738 pci_save_state(ioat->device); 1739 } 1740 1741 ioat_reset(ioat); 1742 CTR2(KTR_IOAT, "%s channel=%u hardware reset", __func__, 1743 ioat->chan_idx); 1744 1745 /* Wait at most 20 ms */ 1746 for (timeout = 0; ioat_reset_pending(ioat) && timeout < 20; timeout++) 1747 DELAY(1000); 1748 if (timeout == 20) { 1749 error = ETIMEDOUT; 1750 goto out; 1751 } 1752 1753 if (ioat_model_resets_msix(ioat)) { 1754 ioat_log_message(1, "device resets registers; restored\n"); 1755 pci_restore_state(ioat->device); 1756 } 1757 1758 /* Reset attempts to return the hardware to "halted." */ 1759 status = ioat_get_chansts(ioat); 1760 if (is_ioat_active(status) || is_ioat_idle(status)) { 1761 /* So this really shouldn't happen... */ 1762 ioat_log_message(0, "Device is active after a reset?\n"); 1763 ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN); 1764 error = 0; 1765 goto out; 1766 } 1767 1768 chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 1769 if (chanerr != 0) { 1770 mtx_lock(&ioat->cleanup_lock); 1771 ioat_halted_debug(ioat, chanerr); 1772 mtx_unlock(&ioat->cleanup_lock); 1773 error = EIO; 1774 goto out; 1775 } 1776 1777 /* 1778 * Bring device back online after reset. Writing CHAINADDR brings the 1779 * device back to active. 1780 * 1781 * The internal ring counter resets to zero, so we have to start over 1782 * at zero as well. 1783 */ 1784 ioat->tail = ioat->head = 0; 1785 *ioat->comp_update = ioat->last_seen = 1786 RING_PHYS_ADDR(ioat, ioat->tail - 1); 1787 1788 ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN); 1789 ioat_write_chancmp(ioat, ioat->comp_update_bus_addr); 1790 ioat_write_chainaddr(ioat, RING_PHYS_ADDR(ioat, 0)); 1791 error = 0; 1792 CTR2(KTR_IOAT, "%s channel=%u configured channel", __func__, 1793 ioat->chan_idx); 1794 1795 out: 1796 /* Enqueues a null operation and ensures it completes. */ 1797 if (error == 0) { 1798 error = ioat_start_channel(ioat); 1799 CTR2(KTR_IOAT, "%s channel=%u started channel", __func__, 1800 ioat->chan_idx); 1801 } 1802 1803 /* 1804 * Resume completions now that ring state is consistent. 1805 */ 1806 mtx_lock(&ioat->cleanup_lock); 1807 ioat->resetting_cleanup = FALSE; 1808 mtx_unlock(&ioat->cleanup_lock); 1809 1810 /* Unblock submission of new work */ 1811 mtx_lock(&ioat->submit_lock); 1812 ioat->quiescing = FALSE; 1813 wakeup(&ioat->quiescing); 1814 1815 ioat->resetting = FALSE; 1816 wakeup(&ioat->resetting); 1817 1818 CTR2(KTR_IOAT, "%s channel=%u reset done", __func__, ioat->chan_idx); 1819 mtx_unlock(&ioat->submit_lock); 1820 1821 return (error); 1822 } 1823 1824 static int 1825 sysctl_handle_chansts(SYSCTL_HANDLER_ARGS) 1826 { 1827 struct ioat_softc *ioat; 1828 struct sbuf sb; 1829 uint64_t status; 1830 int error; 1831 1832 ioat = arg1; 1833 1834 status = ioat_get_chansts(ioat) & IOAT_CHANSTS_STATUS; 1835 1836 sbuf_new_for_sysctl(&sb, NULL, 256, req); 1837 switch (status) { 1838 case IOAT_CHANSTS_ACTIVE: 1839 sbuf_printf(&sb, "ACTIVE"); 1840 break; 1841 case IOAT_CHANSTS_IDLE: 1842 sbuf_printf(&sb, "IDLE"); 1843 break; 1844 case IOAT_CHANSTS_SUSPENDED: 1845 sbuf_printf(&sb, "SUSPENDED"); 1846 break; 1847 case IOAT_CHANSTS_HALTED: 1848 sbuf_printf(&sb, "HALTED"); 1849 break; 1850 case IOAT_CHANSTS_ARMED: 1851 sbuf_printf(&sb, "ARMED"); 1852 break; 1853 default: 1854 sbuf_printf(&sb, "UNKNOWN"); 1855 break; 1856 } 1857 error = sbuf_finish(&sb); 1858 sbuf_delete(&sb); 1859 1860 if (error != 0 || req->newptr == NULL) 1861 return (error); 1862 return (EINVAL); 1863 } 1864 1865 static int 1866 sysctl_handle_dpi(SYSCTL_HANDLER_ARGS) 1867 { 1868 struct ioat_softc *ioat; 1869 struct sbuf sb; 1870 #define PRECISION "1" 1871 const uintmax_t factor = 10; 1872 uintmax_t rate; 1873 int error; 1874 1875 ioat = arg1; 1876 sbuf_new_for_sysctl(&sb, NULL, 16, req); 1877 1878 if (ioat->stats.interrupts == 0) { 1879 sbuf_printf(&sb, "NaN"); 1880 goto out; 1881 } 1882 rate = ioat->stats.descriptors_processed * factor / 1883 ioat->stats.interrupts; 1884 sbuf_printf(&sb, "%ju.%." PRECISION "ju", rate / factor, 1885 rate % factor); 1886 #undef PRECISION 1887 out: 1888 error = sbuf_finish(&sb); 1889 sbuf_delete(&sb); 1890 if (error != 0 || req->newptr == NULL) 1891 return (error); 1892 return (EINVAL); 1893 } 1894 1895 static int 1896 sysctl_handle_reset(SYSCTL_HANDLER_ARGS) 1897 { 1898 struct ioat_softc *ioat; 1899 int error, arg; 1900 1901 ioat = arg1; 1902 1903 arg = 0; 1904 error = SYSCTL_OUT(req, &arg, sizeof(arg)); 1905 if (error != 0 || req->newptr == NULL) 1906 return (error); 1907 1908 error = SYSCTL_IN(req, &arg, sizeof(arg)); 1909 if (error != 0) 1910 return (error); 1911 1912 if (arg != 0) 1913 error = ioat_reset_hw(ioat); 1914 1915 return (error); 1916 } 1917 1918 static void 1919 dump_descriptor(void *hw_desc) 1920 { 1921 int i, j; 1922 1923 for (i = 0; i < 2; i++) { 1924 for (j = 0; j < 8; j++) 1925 printf("%08x ", ((uint32_t *)hw_desc)[i * 8 + j]); 1926 printf("\n"); 1927 } 1928 } 1929 1930 static void 1931 ioat_setup_sysctl(device_t device) 1932 { 1933 struct sysctl_oid_list *par, *statpar, *state, *hammer; 1934 struct sysctl_ctx_list *ctx; 1935 struct sysctl_oid *tree, *tmp; 1936 struct ioat_softc *ioat; 1937 1938 ioat = DEVICE2SOFTC(device); 1939 ctx = device_get_sysctl_ctx(device); 1940 tree = device_get_sysctl_tree(device); 1941 par = SYSCTL_CHILDREN(tree); 1942 1943 SYSCTL_ADD_INT(ctx, par, OID_AUTO, "version", CTLFLAG_RD, 1944 &ioat->version, 0, "HW version (0xMM form)"); 1945 SYSCTL_ADD_UINT(ctx, par, OID_AUTO, "max_xfer_size", CTLFLAG_RD, 1946 &ioat->max_xfer_size, 0, "HW maximum transfer size"); 1947 SYSCTL_ADD_INT(ctx, par, OID_AUTO, "intrdelay_supported", CTLFLAG_RD, 1948 &ioat->intrdelay_supported, 0, "Is INTRDELAY supported"); 1949 SYSCTL_ADD_U16(ctx, par, OID_AUTO, "intrdelay_max", CTLFLAG_RD, 1950 &ioat->intrdelay_max, 0, 1951 "Maximum configurable INTRDELAY on this channel (microseconds)"); 1952 1953 tmp = SYSCTL_ADD_NODE(ctx, par, OID_AUTO, "state", 1954 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "IOAT channel internal state"); 1955 state = SYSCTL_CHILDREN(tmp); 1956 1957 SYSCTL_ADD_UINT(ctx, state, OID_AUTO, "ring_size_order", CTLFLAG_RD, 1958 &ioat->ring_size_order, 0, "SW descriptor ring size order"); 1959 SYSCTL_ADD_UINT(ctx, state, OID_AUTO, "head", CTLFLAG_RD, &ioat->head, 1960 0, "SW descriptor head pointer index"); 1961 SYSCTL_ADD_UINT(ctx, state, OID_AUTO, "tail", CTLFLAG_RD, &ioat->tail, 1962 0, "SW descriptor tail pointer index"); 1963 1964 SYSCTL_ADD_UQUAD(ctx, state, OID_AUTO, "last_completion", CTLFLAG_RD, 1965 ioat->comp_update, "HW addr of last completion"); 1966 1967 SYSCTL_ADD_INT(ctx, state, OID_AUTO, "is_submitter_processing", 1968 CTLFLAG_RD, &ioat->is_submitter_processing, 0, 1969 "submitter processing"); 1970 1971 SYSCTL_ADD_PROC(ctx, state, OID_AUTO, "chansts", 1972 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, ioat, 0, 1973 sysctl_handle_chansts, "A", "String of the channel status"); 1974 1975 SYSCTL_ADD_U16(ctx, state, OID_AUTO, "intrdelay", CTLFLAG_RD, 1976 &ioat->cached_intrdelay, 0, 1977 "Current INTRDELAY on this channel (cached, microseconds)"); 1978 1979 tmp = SYSCTL_ADD_NODE(ctx, par, OID_AUTO, "hammer", 1980 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 1981 "Big hammers (mostly for testing)"); 1982 hammer = SYSCTL_CHILDREN(tmp); 1983 1984 SYSCTL_ADD_PROC(ctx, hammer, OID_AUTO, "force_hw_reset", 1985 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, ioat, 0, 1986 sysctl_handle_reset, "I", "Set to non-zero to reset the hardware"); 1987 1988 tmp = SYSCTL_ADD_NODE(ctx, par, OID_AUTO, "stats", 1989 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "IOAT channel statistics"); 1990 statpar = SYSCTL_CHILDREN(tmp); 1991 1992 SYSCTL_ADD_UQUAD(ctx, statpar, OID_AUTO, "interrupts", 1993 CTLFLAG_RW | CTLFLAG_STATS, &ioat->stats.interrupts, 1994 "Number of interrupts processed on this channel"); 1995 SYSCTL_ADD_UQUAD(ctx, statpar, OID_AUTO, "descriptors", 1996 CTLFLAG_RW | CTLFLAG_STATS, &ioat->stats.descriptors_processed, 1997 "Number of descriptors processed on this channel"); 1998 SYSCTL_ADD_UQUAD(ctx, statpar, OID_AUTO, "submitted", 1999 CTLFLAG_RW | CTLFLAG_STATS, &ioat->stats.descriptors_submitted, 2000 "Number of descriptors submitted to this channel"); 2001 SYSCTL_ADD_UQUAD(ctx, statpar, OID_AUTO, "errored", 2002 CTLFLAG_RW | CTLFLAG_STATS, &ioat->stats.descriptors_error, 2003 "Number of descriptors failed by channel errors"); 2004 SYSCTL_ADD_U32(ctx, statpar, OID_AUTO, "halts", 2005 CTLFLAG_RW | CTLFLAG_STATS, &ioat->stats.channel_halts, 0, 2006 "Number of times the channel has halted"); 2007 SYSCTL_ADD_U32(ctx, statpar, OID_AUTO, "last_halt_chanerr", 2008 CTLFLAG_RW | CTLFLAG_STATS, &ioat->stats.last_halt_chanerr, 0, 2009 "The raw CHANERR when the channel was last halted"); 2010 2011 SYSCTL_ADD_PROC(ctx, statpar, OID_AUTO, "desc_per_interrupt", 2012 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, ioat, 0, 2013 sysctl_handle_dpi, "A", "Descriptors per interrupt"); 2014 } 2015 2016 static void 2017 ioat_get(struct ioat_softc *ioat) 2018 { 2019 2020 mtx_assert(&ioat->submit_lock, MA_OWNED); 2021 KASSERT(ioat->refcnt < UINT32_MAX, ("refcnt overflow")); 2022 2023 ioat->refcnt++; 2024 } 2025 2026 static void 2027 ioat_put(struct ioat_softc *ioat) 2028 { 2029 2030 mtx_assert(&ioat->submit_lock, MA_OWNED); 2031 KASSERT(ioat->refcnt >= 1, ("refcnt error")); 2032 2033 if (--ioat->refcnt == 0) 2034 wakeup(&ioat->refcnt); 2035 } 2036 2037 static void 2038 ioat_drain_locked(struct ioat_softc *ioat) 2039 { 2040 2041 mtx_assert(&ioat->submit_lock, MA_OWNED); 2042 2043 while (ioat->refcnt > 0) 2044 msleep(&ioat->refcnt, &ioat->submit_lock, 0, "ioat_drain", 0); 2045 } 2046 2047 #ifdef DDB 2048 #define _db_show_lock(lo) LOCK_CLASS(lo)->lc_ddb_show(lo) 2049 #define db_show_lock(lk) _db_show_lock(&(lk)->lock_object) 2050 DB_SHOW_COMMAND(ioat, db_show_ioat) 2051 { 2052 struct ioat_softc *sc; 2053 unsigned idx; 2054 2055 if (!have_addr) 2056 goto usage; 2057 idx = (unsigned)addr; 2058 if (idx >= ioat_channel_index) 2059 goto usage; 2060 2061 sc = ioat_channel[idx]; 2062 db_printf("ioat softc at %p\n", sc); 2063 if (sc == NULL) 2064 return; 2065 2066 db_printf(" version: %d\n", sc->version); 2067 db_printf(" chan_idx: %u\n", sc->chan_idx); 2068 db_printf(" submit_lock: "); 2069 db_show_lock(&sc->submit_lock); 2070 2071 db_printf(" capabilities: %b\n", (int)sc->capabilities, 2072 IOAT_DMACAP_STR); 2073 db_printf(" cached_intrdelay: %u\n", sc->cached_intrdelay); 2074 db_printf(" *comp_update: 0x%jx\n", (uintmax_t)*sc->comp_update); 2075 2076 db_printf(" poll_timer:\n"); 2077 db_printf(" c_time: %ju\n", (uintmax_t)sc->poll_timer.c_time); 2078 db_printf(" c_arg: %p\n", sc->poll_timer.c_arg); 2079 db_printf(" c_func: %p\n", sc->poll_timer.c_func); 2080 db_printf(" c_lock: %p\n", sc->poll_timer.c_lock); 2081 db_printf(" c_flags: 0x%x\n", (unsigned)sc->poll_timer.c_flags); 2082 2083 db_printf(" quiescing: %d\n", (int)sc->quiescing); 2084 db_printf(" destroying: %d\n", (int)sc->destroying); 2085 db_printf(" is_submitter_processing: %d\n", 2086 (int)sc->is_submitter_processing); 2087 db_printf(" intrdelay_supported: %d\n", (int)sc->intrdelay_supported); 2088 db_printf(" resetting: %d\n", (int)sc->resetting); 2089 2090 db_printf(" head: %u\n", sc->head); 2091 db_printf(" tail: %u\n", sc->tail); 2092 db_printf(" ring_size_order: %u\n", sc->ring_size_order); 2093 db_printf(" last_seen: 0x%lx\n", sc->last_seen); 2094 db_printf(" ring: %p\n", sc->ring); 2095 db_printf(" descriptors: %p\n", sc->hw_desc_ring); 2096 db_printf(" descriptors (phys): 0x%jx\n", 2097 (uintmax_t)sc->hw_desc_bus_addr); 2098 2099 db_printf(" ring[%u] (tail):\n", sc->tail % 2100 (1 << sc->ring_size_order)); 2101 db_printf(" id: %u\n", ioat_get_ring_entry(sc, sc->tail)->id); 2102 db_printf(" addr: 0x%lx\n", 2103 RING_PHYS_ADDR(sc, sc->tail)); 2104 db_printf(" next: 0x%lx\n", 2105 ioat_get_descriptor(sc, sc->tail)->generic.next); 2106 2107 db_printf(" ring[%u] (head - 1):\n", (sc->head - 1) % 2108 (1 << sc->ring_size_order)); 2109 db_printf(" id: %u\n", ioat_get_ring_entry(sc, sc->head - 1)->id); 2110 db_printf(" addr: 0x%lx\n", 2111 RING_PHYS_ADDR(sc, sc->head - 1)); 2112 db_printf(" next: 0x%lx\n", 2113 ioat_get_descriptor(sc, sc->head - 1)->generic.next); 2114 2115 db_printf(" ring[%u] (head):\n", (sc->head) % 2116 (1 << sc->ring_size_order)); 2117 db_printf(" id: %u\n", ioat_get_ring_entry(sc, sc->head)->id); 2118 db_printf(" addr: 0x%lx\n", 2119 RING_PHYS_ADDR(sc, sc->head)); 2120 db_printf(" next: 0x%lx\n", 2121 ioat_get_descriptor(sc, sc->head)->generic.next); 2122 2123 for (idx = 0; idx < (1 << sc->ring_size_order); idx++) 2124 if ((*sc->comp_update & IOAT_CHANSTS_COMPLETED_DESCRIPTOR_MASK) 2125 == RING_PHYS_ADDR(sc, idx)) 2126 db_printf(" ring[%u] == hardware tail\n", idx); 2127 2128 db_printf(" cleanup_lock: "); 2129 db_show_lock(&sc->cleanup_lock); 2130 2131 db_printf(" refcnt: %u\n", sc->refcnt); 2132 db_printf(" stats:\n"); 2133 db_printf(" interrupts: %lu\n", sc->stats.interrupts); 2134 db_printf(" descriptors_processed: %lu\n", sc->stats.descriptors_processed); 2135 db_printf(" descriptors_error: %lu\n", sc->stats.descriptors_error); 2136 db_printf(" descriptors_submitted: %lu\n", sc->stats.descriptors_submitted); 2137 2138 db_printf(" channel_halts: %u\n", sc->stats.channel_halts); 2139 db_printf(" last_halt_chanerr: %u\n", sc->stats.last_halt_chanerr); 2140 2141 if (db_pager_quit) 2142 return; 2143 2144 db_printf(" hw status:\n"); 2145 db_printf(" status: 0x%lx\n", ioat_get_chansts(sc)); 2146 db_printf(" chanctrl: 0x%x\n", 2147 (unsigned)ioat_read_2(sc, IOAT_CHANCTRL_OFFSET)); 2148 db_printf(" chancmd: 0x%x\n", 2149 (unsigned)ioat_read_1(sc, IOAT_CHANCMD_OFFSET)); 2150 db_printf(" dmacount: 0x%x\n", 2151 (unsigned)ioat_read_2(sc, IOAT_DMACOUNT_OFFSET)); 2152 db_printf(" chainaddr: 0x%lx\n", 2153 ioat_read_double_4(sc, IOAT_CHAINADDR_OFFSET_LOW)); 2154 db_printf(" chancmp: 0x%lx\n", 2155 ioat_read_double_4(sc, IOAT_CHANCMP_OFFSET_LOW)); 2156 db_printf(" chanerr: %b\n", 2157 (int)ioat_read_4(sc, IOAT_CHANERR_OFFSET), IOAT_CHANERR_STR); 2158 return; 2159 usage: 2160 db_printf("usage: show ioat <0-%u>\n", ioat_channel_index); 2161 return; 2162 } 2163 #endif /* DDB */ 2164