tws.c revision 226476
1/* 2 * Copyright (c) 2010, LSI Corp. 3 * All rights reserved. 4 * Author : Manjunath Ranganathaiah 5 * Support: freebsdraid@lsi.com 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of the <ORGANIZATION> nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 * 34 * $FreeBSD: head/sys/dev/tws/tws.c 226476 2011-10-17 19:21:42Z delphij $ 35*/ 36 37 38#include <dev/tws/tws.h> 39#include <dev/tws/tws_services.h> 40#include <dev/tws/tws_hdm.h> 41 42#include <cam/cam.h> 43#include <cam/cam_ccb.h> 44 45MALLOC_DEFINE(M_TWS, "twsbuf", "buffers used by tws driver"); 46int tws_queue_depth = TWS_MAX_REQS; 47int tws_enable_msi = 0; 48int tws_enable_msix = 0; 49 50 51 52/* externs */ 53extern int tws_cam_attach(struct tws_softc *sc); 54extern void tws_cam_detach(struct tws_softc *sc); 55extern int tws_init_ctlr(struct tws_softc *sc); 56extern boolean tws_ctlr_ready(struct tws_softc *sc); 57extern void tws_turn_off_interrupts(struct tws_softc *sc); 58extern void tws_q_insert_tail(struct tws_softc *sc, struct tws_request *req, 59 u_int8_t q_type ); 60extern struct tws_request *tws_q_remove_request(struct tws_softc *sc, 61 struct tws_request *req, u_int8_t q_type ); 62extern struct tws_request *tws_q_remove_head(struct tws_softc *sc, 63 u_int8_t q_type ); 64extern boolean tws_get_response(struct tws_softc *sc, u_int16_t *req_id); 65extern boolean tws_ctlr_reset(struct tws_softc *sc); 66extern void tws_intr(void *arg); 67extern int tws_use_32bit_sgls; 68 69 70struct tws_request *tws_get_request(struct tws_softc *sc, u_int16_t type); 71int tws_init_connect(struct tws_softc *sc, u_int16_t mc); 72void tws_send_event(struct tws_softc *sc, u_int8_t event); 73uint8_t tws_get_state(struct tws_softc *sc); 74void tws_release_request(struct tws_request *req); 75 76 77 78/* Function prototypes */ 79static d_open_t tws_open; 80static d_close_t tws_close; 81static d_read_t tws_read; 82static d_write_t tws_write; 83extern d_ioctl_t tws_ioctl; 84 85static int tws_init(struct tws_softc *sc); 86static void tws_dmamap_cmds_load_cbfn(void *arg, bus_dma_segment_t *segs, 87 int nseg, int error); 88 89static int tws_init_reqs(struct tws_softc *sc, u_int32_t dma_mem_size); 90static int tws_init_aen_q(struct tws_softc *sc); 91static int tws_init_trace_q(struct tws_softc *sc); 92static int tws_setup_irq(struct tws_softc *sc); 93int tws_setup_intr(struct tws_softc *sc, int irqs); 94int tws_teardown_intr(struct tws_softc *sc); 95 96 97/* Character device entry points */ 98 99static struct cdevsw tws_cdevsw = { 100 .d_version = D_VERSION, 101 .d_open = tws_open, 102 .d_close = tws_close, 103 .d_read = tws_read, 104 .d_write = tws_write, 105 .d_ioctl = tws_ioctl, 106 .d_name = "tws", 107}; 108 109/* 110 * In the cdevsw routines, we find our softc by using the si_drv1 member 111 * of struct cdev. We set this variable to point to our softc in our 112 * attach routine when we create the /dev entry. 113 */ 114 115int 116tws_open(struct cdev *dev, int oflags, int devtype, d_thread_t *td) 117{ 118 struct tws_softc *sc = dev->si_drv1; 119 120 if ( sc ) 121 TWS_TRACE_DEBUG(sc, "entry", dev, oflags); 122 return (0); 123} 124 125int 126tws_close(struct cdev *dev, int fflag, int devtype, d_thread_t *td) 127{ 128 struct tws_softc *sc = dev->si_drv1; 129 130 if ( sc ) 131 TWS_TRACE_DEBUG(sc, "entry", dev, fflag); 132 return (0); 133} 134 135int 136tws_read(struct cdev *dev, struct uio *uio, int ioflag) 137{ 138 struct tws_softc *sc = dev->si_drv1; 139 140 if ( sc ) 141 TWS_TRACE_DEBUG(sc, "entry", dev, ioflag); 142 return (0); 143} 144 145int 146tws_write(struct cdev *dev, struct uio *uio, int ioflag) 147{ 148 struct tws_softc *sc = dev->si_drv1; 149 150 if ( sc ) 151 TWS_TRACE_DEBUG(sc, "entry", dev, ioflag); 152 return (0); 153} 154 155/* PCI Support Functions */ 156 157/* 158 * Compare the device ID of this device against the IDs that this driver 159 * supports. If there is a match, set the description and return success. 160 */ 161static int 162tws_probe(device_t dev) 163{ 164 static u_int8_t first_ctlr = 1; 165 166 if ((pci_get_vendor(dev) == TWS_VENDOR_ID) && 167 (pci_get_device(dev) == TWS_DEVICE_ID)) { 168 device_set_desc(dev, "LSI 3ware SAS/SATA Storage Controller"); 169 if (first_ctlr) { 170 printf("LSI 3ware device driver for SAS/SATA storage " 171 "controllers, version: %s\n", TWS_DRIVER_VERSION_STRING); 172 first_ctlr = 0; 173 } 174 175 return(BUS_PROBE_DEFAULT); 176 } 177 return (ENXIO); 178} 179 180/* Attach function is only called if the probe is successful. */ 181 182static int 183tws_attach(device_t dev) 184{ 185 struct tws_softc *sc = device_get_softc(dev); 186 u_int32_t cmd, bar; 187 int error=0,i; 188 189 /* no tracing yet */ 190 /* Look up our softc and initialize its fields. */ 191 sc->tws_dev = dev; 192 sc->device_id = pci_get_device(dev); 193 sc->subvendor_id = pci_get_subvendor(dev); 194 sc->subdevice_id = pci_get_subdevice(dev); 195 196 /* Intialize mutexes */ 197 mtx_init( &sc->q_lock, "tws_q_lock", NULL, MTX_DEF); 198 mtx_init( &sc->sim_lock, "tws_sim_lock", NULL, MTX_DEF); 199 mtx_init( &sc->gen_lock, "tws_gen_lock", NULL, MTX_DEF); 200 mtx_init( &sc->io_lock, "tws_io_lock", NULL, MTX_DEF); 201 202 if ( tws_init_trace_q(sc) == FAILURE ) 203 printf("trace init failure\n"); 204 /* send init event */ 205 mtx_lock(&sc->gen_lock); 206 tws_send_event(sc, TWS_INIT_START); 207 mtx_unlock(&sc->gen_lock); 208 209 210#if _BYTE_ORDER == _BIG_ENDIAN 211 TWS_TRACE(sc, "BIG endian", 0, 0); 212#endif 213 /* sysctl context setup */ 214 sysctl_ctx_init(&sc->tws_clist); 215 sc->tws_oidp = SYSCTL_ADD_NODE(&sc->tws_clist, 216 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 217 device_get_nameunit(dev), 218 CTLFLAG_RD, 0, ""); 219 if ( sc->tws_oidp == NULL ) { 220 tws_log(sc, SYSCTL_TREE_NODE_ADD); 221 goto attach_fail_1; 222 } 223 SYSCTL_ADD_STRING(&sc->tws_clist, SYSCTL_CHILDREN(sc->tws_oidp), 224 OID_AUTO, "driver_version", CTLFLAG_RD, 225 TWS_DRIVER_VERSION_STRING, 0, "TWS driver version"); 226 227 cmd = pci_read_config(dev, PCIR_COMMAND, 2); 228 if ( (cmd & PCIM_CMD_PORTEN) == 0) { 229 tws_log(sc, PCI_COMMAND_READ); 230 goto attach_fail_1; 231 } 232 /* Force the busmaster enable bit on. */ 233 cmd |= PCIM_CMD_BUSMASTEREN; 234 pci_write_config(dev, PCIR_COMMAND, cmd, 2); 235 236 bar = pci_read_config(dev, TWS_PCI_BAR0, 4); 237 TWS_TRACE_DEBUG(sc, "bar0 ", bar, 0); 238 bar = pci_read_config(dev, TWS_PCI_BAR1, 4); 239 bar = bar & ~TWS_BIT2; 240 TWS_TRACE_DEBUG(sc, "bar1 ", bar, 0); 241 242 /* MFA base address is BAR2 register used for 243 * push mode. Firmware will evatualy move to 244 * pull mode during witch this needs to change 245 */ 246#ifndef TWS_PULL_MODE_ENABLE 247 sc->mfa_base = (u_int64_t)pci_read_config(dev, TWS_PCI_BAR2, 4); 248 sc->mfa_base = sc->mfa_base & ~TWS_BIT2; 249 TWS_TRACE_DEBUG(sc, "bar2 ", sc->mfa_base, 0); 250#endif 251 252 /* allocate MMIO register space */ 253 sc->reg_res_id = TWS_PCI_BAR1; /* BAR1 offset */ 254 if ((sc->reg_res = bus_alloc_resource(dev, SYS_RES_MEMORY, 255 &(sc->reg_res_id), 0, ~0, 1, RF_ACTIVE)) 256 == NULL) { 257 tws_log(sc, ALLOC_MEMORY_RES); 258 goto attach_fail_1; 259 } 260 sc->bus_tag = rman_get_bustag(sc->reg_res); 261 sc->bus_handle = rman_get_bushandle(sc->reg_res); 262 263#ifndef TWS_PULL_MODE_ENABLE 264 /* Allocate bus space for inbound mfa */ 265 sc->mfa_res_id = TWS_PCI_BAR2; /* BAR2 offset */ 266 if ((sc->mfa_res = bus_alloc_resource(dev, SYS_RES_MEMORY, 267 &(sc->mfa_res_id), 0, ~0, 0x100000, RF_ACTIVE)) 268 == NULL) { 269 tws_log(sc, ALLOC_MEMORY_RES); 270 goto attach_fail_2; 271 } 272 sc->bus_mfa_tag = rman_get_bustag(sc->mfa_res); 273 sc->bus_mfa_handle = rman_get_bushandle(sc->mfa_res); 274#endif 275 276 /* Allocate and register our interrupt. */ 277 sc->intr_type = TWS_INTx; /* default */ 278 279 if ( tws_enable_msi ) 280 sc->intr_type = TWS_MSI; 281 if ( tws_setup_irq(sc) == FAILURE ) { 282 tws_log(sc, ALLOC_MEMORY_RES); 283 goto attach_fail_3; 284 } 285 286 /* 287 * Create a /dev entry for this device. The kernel will assign us 288 * a major number automatically. We use the unit number of this 289 * device as the minor number and name the character device 290 * "tws<unit>". 291 */ 292 sc->tws_cdev = make_dev(&tws_cdevsw, device_get_unit(dev), 293 UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, "tws%u", 294 device_get_unit(dev)); 295 sc->tws_cdev->si_drv1 = sc; 296 297 if ( tws_init(sc) == FAILURE ) { 298 tws_log(sc, TWS_INIT_FAILURE); 299 goto attach_fail_4; 300 } 301 if ( tws_init_ctlr(sc) == FAILURE ) { 302 tws_log(sc, TWS_CTLR_INIT_FAILURE); 303 goto attach_fail_4; 304 } 305 if ((error = tws_cam_attach(sc))) { 306 tws_log(sc, TWS_CAM_ATTACH); 307 goto attach_fail_4; 308 } 309 /* send init complete event */ 310 mtx_lock(&sc->gen_lock); 311 tws_send_event(sc, TWS_INIT_COMPLETE); 312 mtx_unlock(&sc->gen_lock); 313 314 TWS_TRACE_DEBUG(sc, "attached successfully", 0, sc->device_id); 315 return(0); 316 317attach_fail_4: 318 tws_teardown_intr(sc); 319 destroy_dev(sc->tws_cdev); 320attach_fail_3: 321 for(i=0;i<sc->irqs;i++) { 322 if ( sc->irq_res[i] ){ 323 if (bus_release_resource(sc->tws_dev, 324 SYS_RES_IRQ, sc->irq_res_id[i], sc->irq_res[i])) 325 TWS_TRACE(sc, "bus irq res", 0, 0); 326 } 327 } 328#ifndef TWS_PULL_MODE_ENABLE 329attach_fail_2: 330#endif 331 if ( sc->mfa_res ){ 332 if (bus_release_resource(sc->tws_dev, 333 SYS_RES_MEMORY, sc->mfa_res_id, sc->mfa_res)) 334 TWS_TRACE(sc, "bus release ", 0, sc->mfa_res_id); 335 } 336 if ( sc->reg_res ){ 337 if (bus_release_resource(sc->tws_dev, 338 SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res)) 339 TWS_TRACE(sc, "bus release2 ", 0, sc->reg_res_id); 340 } 341attach_fail_1: 342 mtx_destroy(&sc->q_lock); 343 mtx_destroy(&sc->sim_lock); 344 mtx_destroy(&sc->gen_lock); 345 mtx_destroy(&sc->io_lock); 346 sysctl_ctx_free(&sc->tws_clist); 347 return (ENXIO); 348} 349 350/* Detach device. */ 351 352static int 353tws_detach(device_t dev) 354{ 355 struct tws_softc *sc = device_get_softc(dev); 356 int i; 357 u_int32_t reg; 358 359 TWS_TRACE_DEBUG(sc, "entry", 0, 0); 360 361 mtx_lock(&sc->gen_lock); 362 tws_send_event(sc, TWS_UNINIT_START); 363 mtx_unlock(&sc->gen_lock); 364 365 /* needs to disable interrupt before detaching from cam */ 366 tws_turn_off_interrupts(sc); 367 /* clear door bell */ 368 tws_write_reg(sc, TWS_I2O0_HOBDBC, ~0, 4); 369 reg = tws_read_reg(sc, TWS_I2O0_HIMASK, 4); 370 TWS_TRACE_DEBUG(sc, "turn-off-intr", reg, 0); 371 sc->obfl_q_overrun = false; 372 tws_init_connect(sc, 1); 373 374 /* Teardown the state in our softc created in our attach routine. */ 375 /* Disconnect the interrupt handler. */ 376 tws_teardown_intr(sc); 377 378 /* Release irq resource */ 379 for(i=0;i<sc->irqs;i++) { 380 if ( sc->irq_res[i] ){ 381 if (bus_release_resource(sc->tws_dev, 382 SYS_RES_IRQ, sc->irq_res_id[i], sc->irq_res[i])) 383 TWS_TRACE(sc, "bus release irq resource", 384 i, sc->irq_res_id[i]); 385 } 386 } 387 if ( sc->intr_type == TWS_MSI ) { 388 pci_release_msi(sc->tws_dev); 389 } 390 391 tws_cam_detach(sc); 392 393 /* Release memory resource */ 394 if ( sc->mfa_res ){ 395 if (bus_release_resource(sc->tws_dev, 396 SYS_RES_MEMORY, sc->mfa_res_id, sc->mfa_res)) 397 TWS_TRACE(sc, "bus release mem resource", 0, sc->mfa_res_id); 398 } 399 if ( sc->reg_res ){ 400 if (bus_release_resource(sc->tws_dev, 401 SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res)) 402 TWS_TRACE(sc, "bus release mem resource", 0, sc->reg_res_id); 403 } 404 405 free(sc->reqs, M_TWS); 406 free(sc->sense_bufs, M_TWS); 407 free(sc->scan_ccb, M_TWS); 408 free(sc->aen_q.q, M_TWS); 409 free(sc->trace_q.q, M_TWS); 410 mtx_destroy(&sc->q_lock); 411 mtx_destroy(&sc->sim_lock); 412 mtx_destroy(&sc->gen_lock); 413 mtx_destroy(&sc->io_lock); 414 destroy_dev(sc->tws_cdev); 415 sysctl_ctx_free(&sc->tws_clist); 416 return (0); 417} 418 419int 420tws_setup_intr(struct tws_softc *sc, int irqs) 421{ 422 int i, error; 423 424 for(i=0;i<irqs;i++) { 425 if (!(sc->intr_handle[i])) { 426 if ((error = bus_setup_intr(sc->tws_dev, sc->irq_res[i], 427 INTR_TYPE_CAM | INTR_MPSAFE, 428#if (__FreeBSD_version >= 700000) 429 NULL, 430#endif 431 tws_intr, sc, &sc->intr_handle[i]))) { 432 tws_log(sc, SETUP_INTR_RES); 433 return(FAILURE); 434 } 435 } 436 } 437 return(SUCCESS); 438 439} 440 441 442int 443tws_teardown_intr(struct tws_softc *sc) 444{ 445 int i, error; 446 447 for(i=0;i<sc->irqs;i++) { 448 if (sc->intr_handle[i]) { 449 error = bus_teardown_intr(sc->tws_dev, 450 sc->irq_res[i], sc->intr_handle[i]); 451 sc->intr_handle[i] = NULL; 452 } 453 } 454 return(SUCCESS); 455} 456 457 458static int 459tws_setup_irq(struct tws_softc *sc) 460{ 461 int messages; 462 u_int16_t cmd; 463 464 cmd = pci_read_config(sc->tws_dev, PCIR_COMMAND, 2); 465 switch(sc->intr_type) { 466 case TWS_INTx : 467 cmd = cmd & ~0x0400; 468 pci_write_config(sc->tws_dev, PCIR_COMMAND, cmd, 2); 469 sc->irqs = 1; 470 sc->irq_res_id[0] = 0; 471 sc->irq_res[0] = bus_alloc_resource_any(sc->tws_dev, SYS_RES_IRQ, 472 &sc->irq_res_id[0], RF_SHAREABLE | RF_ACTIVE); 473 if ( ! sc->irq_res[0] ) 474 return(FAILURE); 475 if ( tws_setup_intr(sc, sc->irqs) == FAILURE ) 476 return(FAILURE); 477 device_printf(sc->tws_dev, "Using legacy INTx\n"); 478 break; 479 case TWS_MSI : 480 cmd = cmd | 0x0400; 481 pci_write_config(sc->tws_dev, PCIR_COMMAND, cmd, 2); 482 sc->irqs = 1; 483 sc->irq_res_id[0] = 1; 484 messages = 1; 485 if (pci_alloc_msi(sc->tws_dev, &messages) != 0 ) { 486 TWS_TRACE(sc, "pci alloc msi fail", 0, messages); 487 return(FAILURE); 488 } 489 sc->irq_res[0] = bus_alloc_resource_any(sc->tws_dev, SYS_RES_IRQ, 490 &sc->irq_res_id[0], RF_SHAREABLE | RF_ACTIVE); 491 492 if ( !sc->irq_res[0] ) 493 return(FAILURE); 494 if ( tws_setup_intr(sc, sc->irqs) == FAILURE ) 495 return(FAILURE); 496 device_printf(sc->tws_dev, "Using MSI\n"); 497 break; 498 499 } 500 501 return(SUCCESS); 502} 503 504static int 505tws_init(struct tws_softc *sc) 506{ 507 508 u_int32_t max_sg_elements; 509 u_int32_t dma_mem_size; 510 int error; 511 u_int32_t reg; 512 513 sc->seq_id = 0; 514 if ( tws_queue_depth > TWS_MAX_REQS ) 515 tws_queue_depth = TWS_MAX_REQS; 516 if (tws_queue_depth < TWS_RESERVED_REQS+1) 517 tws_queue_depth = TWS_RESERVED_REQS+1; 518 sc->is64bit = (sizeof(bus_addr_t) == 8) ? true : false; 519 max_sg_elements = (sc->is64bit && !tws_use_32bit_sgls) ? 520 TWS_MAX_64BIT_SG_ELEMENTS : 521 TWS_MAX_32BIT_SG_ELEMENTS; 522 dma_mem_size = (sizeof(struct tws_command_packet) * tws_queue_depth) + 523 (TWS_SECTOR_SIZE) ; 524 if ( bus_dma_tag_create(NULL, /* parent */ 525 TWS_ALIGNMENT, /* alignment */ 526 0, /* boundary */ 527 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 528 BUS_SPACE_MAXADDR, /* highaddr */ 529 NULL, NULL, /* filter, filterarg */ 530 BUS_SPACE_MAXSIZE, /* maxsize */ 531 max_sg_elements, /* numsegs */ 532 BUS_SPACE_MAXSIZE, /* maxsegsize */ 533 0, /* flags */ 534 NULL, NULL, /* lockfunc, lockfuncarg */ 535 &sc->parent_tag /* tag */ 536 )) { 537 TWS_TRACE_DEBUG(sc, "DMA parent tag Create fail", max_sg_elements, 538 sc->is64bit); 539 return(ENOMEM); 540 } 541 /* In bound message frame requires 16byte alignment. 542 * Outbound MF's can live with 4byte alignment - for now just 543 * use 16 for both. 544 */ 545 if ( bus_dma_tag_create(sc->parent_tag, /* parent */ 546 TWS_IN_MF_ALIGNMENT, /* alignment */ 547 0, /* boundary */ 548 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 549 BUS_SPACE_MAXADDR, /* highaddr */ 550 NULL, NULL, /* filter, filterarg */ 551 dma_mem_size, /* maxsize */ 552 1, /* numsegs */ 553 BUS_SPACE_MAXSIZE, /* maxsegsize */ 554 0, /* flags */ 555 NULL, NULL, /* lockfunc, lockfuncarg */ 556 &sc->cmd_tag /* tag */ 557 )) { 558 TWS_TRACE_DEBUG(sc, "DMA cmd tag Create fail", max_sg_elements, sc->is64bit); 559 return(ENOMEM); 560 } 561 562 if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem, 563 BUS_DMA_NOWAIT, &sc->cmd_map)) { 564 TWS_TRACE_DEBUG(sc, "DMA mem alloc fail", max_sg_elements, sc->is64bit); 565 return(ENOMEM); 566 } 567 568 /* if bus_dmamem_alloc succeeds then bus_dmamap_load will succeed */ 569 sc->dma_mem_phys=0; 570 error = bus_dmamap_load(sc->cmd_tag, sc->cmd_map, sc->dma_mem, 571 dma_mem_size, tws_dmamap_cmds_load_cbfn, 572 &sc->dma_mem_phys, 0); 573 574 /* 575 * Create a dma tag for data buffers; size will be the maximum 576 * possible I/O size (128kB). 577 */ 578 if (bus_dma_tag_create(sc->parent_tag, /* parent */ 579 TWS_ALIGNMENT, /* alignment */ 580 0, /* boundary */ 581 BUS_SPACE_MAXADDR_32BIT,/* lowaddr */ 582 BUS_SPACE_MAXADDR, /* highaddr */ 583 NULL, NULL, /* filter, filterarg */ 584 TWS_MAX_IO_SIZE, /* maxsize */ 585 max_sg_elements, /* nsegments */ 586 TWS_MAX_IO_SIZE, /* maxsegsize */ 587 BUS_DMA_ALLOCNOW, /* flags */ 588 busdma_lock_mutex, /* lockfunc */ 589 &sc->io_lock, /* lockfuncarg */ 590 &sc->data_tag /* tag */)) { 591 TWS_TRACE_DEBUG(sc, "DMA cmd tag Create fail", max_sg_elements, sc->is64bit); 592 return(ENOMEM); 593 } 594 595 sc->reqs = malloc(sizeof(struct tws_request) * tws_queue_depth, M_TWS, 596 M_WAITOK | M_ZERO); 597 if ( sc->reqs == NULL ) { 598 TWS_TRACE_DEBUG(sc, "malloc failed", 0, sc->is64bit); 599 return(ENOMEM); 600 } 601 sc->sense_bufs = malloc(sizeof(struct tws_sense) * tws_queue_depth, M_TWS, 602 M_WAITOK | M_ZERO); 603 if ( sc->sense_bufs == NULL ) { 604 TWS_TRACE_DEBUG(sc, "sense malloc failed", 0, sc->is64bit); 605 return(ENOMEM); 606 } 607 sc->scan_ccb = malloc(sizeof(union ccb), M_TWS, M_WAITOK | M_ZERO); 608 if ( sc->scan_ccb == NULL ) { 609 TWS_TRACE_DEBUG(sc, "ccb malloc failed", 0, sc->is64bit); 610 return(ENOMEM); 611 } 612 613 if ( !tws_ctlr_ready(sc) ) 614 if( !tws_ctlr_reset(sc) ) 615 return(FAILURE); 616 617 bzero(&sc->stats, sizeof(struct tws_stats)); 618 tws_init_qs(sc); 619 tws_turn_off_interrupts(sc); 620 621 /* 622 * enable pull mode by setting bit1 . 623 * setting bit0 to 1 will enable interrupt coalesing 624 * will revisit. 625 */ 626 627#ifdef TWS_PULL_MODE_ENABLE 628 629 reg = tws_read_reg(sc, TWS_I2O0_CTL, 4); 630 TWS_TRACE_DEBUG(sc, "i20 ctl", reg, TWS_I2O0_CTL); 631 tws_write_reg(sc, TWS_I2O0_CTL, reg | TWS_BIT1, 4); 632 633#endif 634 635 TWS_TRACE_DEBUG(sc, "dma_mem_phys", sc->dma_mem_phys, TWS_I2O0_CTL); 636 if ( tws_init_reqs(sc, dma_mem_size) == FAILURE ) 637 return(FAILURE); 638 if ( tws_init_aen_q(sc) == FAILURE ) 639 return(FAILURE); 640 641 return(SUCCESS); 642 643} 644 645static int 646tws_init_aen_q(struct tws_softc *sc) 647{ 648 sc->aen_q.head=0; 649 sc->aen_q.tail=0; 650 sc->aen_q.depth=256; 651 sc->aen_q.overflow=0; 652 sc->aen_q.q = malloc(sizeof(struct tws_event_packet)*sc->aen_q.depth, 653 M_TWS, M_WAITOK | M_ZERO); 654 if ( ! sc->aen_q.q ) 655 return(FAILURE); 656 return(SUCCESS); 657} 658 659static int 660tws_init_trace_q(struct tws_softc *sc) 661{ 662 sc->trace_q.head=0; 663 sc->trace_q.tail=0; 664 sc->trace_q.depth=256; 665 sc->trace_q.overflow=0; 666 sc->trace_q.q = malloc(sizeof(struct tws_trace_rec)*sc->trace_q.depth, 667 M_TWS, M_WAITOK | M_ZERO); 668 if ( ! sc->trace_q.q ) 669 return(FAILURE); 670 return(SUCCESS); 671} 672 673static int 674tws_init_reqs(struct tws_softc *sc, u_int32_t dma_mem_size) 675{ 676 677 struct tws_command_packet *cmd_buf; 678 cmd_buf = (struct tws_command_packet *)sc->dma_mem; 679 int i; 680 681 bzero(cmd_buf, dma_mem_size); 682 TWS_TRACE_DEBUG(sc, "phy cmd", sc->dma_mem_phys, 0); 683 mtx_lock(&sc->q_lock); 684 for ( i=0; i< tws_queue_depth; i++) 685 { 686 if (bus_dmamap_create(sc->data_tag, 0, &sc->reqs[i].dma_map)) { 687 /* log a ENOMEM failure msg here */ 688 return(FAILURE); 689 } 690 sc->reqs[i].cmd_pkt = &cmd_buf[i]; 691 692 sc->sense_bufs[i].hdr = &cmd_buf[i].hdr ; 693 sc->sense_bufs[i].hdr_pkt_phy = sc->dma_mem_phys + 694 (i * sizeof(struct tws_command_packet)); 695 696 sc->reqs[i].cmd_pkt_phy = sc->dma_mem_phys + 697 sizeof(struct tws_command_header) + 698 (i * sizeof(struct tws_command_packet)); 699 sc->reqs[i].request_id = i; 700 sc->reqs[i].sc = sc; 701 702 sc->reqs[i].cmd_pkt->hdr.header_desc.size_header = 128; 703 704 sc->reqs[i].state = TWS_REQ_STATE_FREE; 705 if ( i >= TWS_RESERVED_REQS ) 706 tws_q_insert_tail(sc, &sc->reqs[i], TWS_FREE_Q); 707 } 708 mtx_unlock(&sc->q_lock); 709 return(SUCCESS); 710} 711 712static void 713tws_dmamap_cmds_load_cbfn(void *arg, bus_dma_segment_t *segs, 714 int nseg, int error) 715{ 716 717 /* printf("command load done \n"); */ 718 719 *((bus_addr_t *)arg) = segs[0].ds_addr; 720} 721 722void 723tws_send_event(struct tws_softc *sc, u_int8_t event) 724{ 725 mtx_assert(&sc->gen_lock, MA_OWNED); 726 TWS_TRACE_DEBUG(sc, "received event ", 0, event); 727 switch (event) { 728 729 case TWS_INIT_START: 730 sc->tws_state = TWS_INIT; 731 break; 732 733 case TWS_INIT_COMPLETE: 734 if (sc->tws_state != TWS_INIT) { 735 device_printf(sc->tws_dev, "invalid state transition %d => TWS_ONLINE\n", sc->tws_state); 736 } else { 737 sc->tws_state = TWS_ONLINE; 738 } 739 break; 740 741 case TWS_RESET_START: 742 /* We can transition to reset state from any state except reset*/ 743 if (sc->tws_state != TWS_RESET) { 744 sc->tws_prev_state = sc->tws_state; 745 sc->tws_state = TWS_RESET; 746 } 747 break; 748 749 case TWS_RESET_COMPLETE: 750 if (sc->tws_state != TWS_RESET) { 751 device_printf(sc->tws_dev, "invalid state transition %d => %d (previous state)\n", sc->tws_state, sc->tws_prev_state); 752 } else { 753 sc->tws_state = sc->tws_prev_state; 754 } 755 break; 756 757 case TWS_SCAN_FAILURE: 758 if (sc->tws_state != TWS_ONLINE) { 759 device_printf(sc->tws_dev, "invalid state transition %d => TWS_OFFLINE\n", sc->tws_state); 760 } else { 761 sc->tws_state = TWS_OFFLINE; 762 } 763 break; 764 765 case TWS_UNINIT_START: 766 if ((sc->tws_state != TWS_ONLINE) && (sc->tws_state != TWS_OFFLINE)) { 767 device_printf(sc->tws_dev, "invalid state transition %d => TWS_UNINIT\n", sc->tws_state); 768 } else { 769 sc->tws_state = TWS_UNINIT; 770 } 771 break; 772 } 773 774} 775 776uint8_t 777tws_get_state(struct tws_softc *sc) 778{ 779 780 return((u_int8_t)sc->tws_state); 781 782} 783 784/* Called during system shutdown after sync. */ 785 786static int 787tws_shutdown(device_t dev) 788{ 789 790 struct tws_softc *sc = device_get_softc(dev); 791 792 TWS_TRACE_DEBUG(sc, "entry", 0, 0); 793 794 tws_turn_off_interrupts(sc); 795 tws_init_connect(sc, 1); 796 797 return (0); 798} 799 800/* 801 * Device suspend routine. 802 */ 803static int 804tws_suspend(device_t dev) 805{ 806 struct tws_softc *sc = device_get_softc(dev); 807 808 if ( sc ) 809 TWS_TRACE_DEBUG(sc, "entry", 0, 0); 810 return (0); 811} 812 813/* 814 * Device resume routine. 815 */ 816static int 817tws_resume(device_t dev) 818{ 819 820 struct tws_softc *sc = device_get_softc(dev); 821 822 if ( sc ) 823 TWS_TRACE_DEBUG(sc, "entry", 0, 0); 824 return (0); 825} 826 827 828struct tws_request * 829tws_get_request(struct tws_softc *sc, u_int16_t type) 830{ 831 struct mtx *my_mutex = ((type == TWS_REQ_TYPE_SCSI_IO) ? &sc->q_lock : &sc->gen_lock); 832 struct tws_request *r = NULL; 833 834 mtx_lock(my_mutex); 835 836 if (type == TWS_REQ_TYPE_SCSI_IO) { 837 r = tws_q_remove_head(sc, TWS_FREE_Q); 838 } else { 839 if ( sc->reqs[type].state == TWS_REQ_STATE_FREE ) { 840 r = &sc->reqs[type]; 841 } 842 } 843 844 if ( r ) { 845 bzero(&r->cmd_pkt->cmd, sizeof(struct tws_command_apache)); 846 r->data = NULL; 847 r->length = 0; 848 r->type = type; 849 r->flags = TWS_DIR_UNKNOWN; 850 r->error_code = TWS_REQ_RET_INVALID; 851 r->cb = NULL; 852 r->ccb_ptr = NULL; 853 r->thandle.callout = NULL; 854 r->next = r->prev = NULL; 855 856 r->state = ((type == TWS_REQ_TYPE_SCSI_IO) ? TWS_REQ_STATE_TRAN : TWS_REQ_STATE_BUSY); 857 } 858 859 mtx_unlock(my_mutex); 860 861 return(r); 862} 863 864void 865tws_release_request(struct tws_request *req) 866{ 867 868 struct tws_softc *sc = req->sc; 869 870 TWS_TRACE_DEBUG(sc, "entry", sc, 0); 871 mtx_lock(&sc->q_lock); 872 tws_q_insert_tail(sc, req, TWS_FREE_Q); 873 mtx_unlock(&sc->q_lock); 874} 875 876static device_method_t tws_methods[] = { 877 /* Device interface */ 878 DEVMETHOD(device_probe, tws_probe), 879 DEVMETHOD(device_attach, tws_attach), 880 DEVMETHOD(device_detach, tws_detach), 881 DEVMETHOD(device_shutdown, tws_shutdown), 882 DEVMETHOD(device_suspend, tws_suspend), 883 DEVMETHOD(device_resume, tws_resume), 884 885 DEVMETHOD(bus_print_child, bus_generic_print_child), 886 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 887 { 0, 0 } 888}; 889 890static driver_t tws_driver = { 891 "tws", 892 tws_methods, 893 sizeof(struct tws_softc) 894}; 895 896 897static devclass_t tws_devclass; 898 899/* DEFINE_CLASS_0(tws, tws_driver, tws_methods, sizeof(struct tws_softc)); */ 900DRIVER_MODULE(tws, pci, tws_driver, tws_devclass, 0, 0); 901MODULE_DEPEND(tws, cam, 1, 1, 1); 902MODULE_DEPEND(tws, pci, 1, 1, 1); 903 904TUNABLE_INT("hw.tws.queue_depth", &tws_queue_depth); 905TUNABLE_INT("hw.tws.enable_msi", &tws_enable_msi); 906