ninjascsi32.c revision 1.2
1 /* $NetBSD: ninjascsi32.c,v 1.2 2004/08/26 18:38:19 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by ITOH Yasufumi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: ninjascsi32.c,v 1.2 2004/08/26 18:38:19 thorpej Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/callout.h> 45 #include <sys/device.h> 46 #include <sys/kernel.h> 47 #include <sys/buf.h> 48 #include <sys/scsiio.h> 49 50 #include <machine/bus.h> 51 #include <machine/intr.h> 52 53 #include <uvm/uvm_extern.h> 54 55 #include <dev/scsipi/scsi_all.h> 56 #include <dev/scsipi/scsipi_all.h> 57 #include <dev/scsipi/scsiconf.h> 58 #include <dev/scsipi/scsi_message.h> 59 60 /* 61 * DualEdge transfer support 62 */ 63 /* #define NJSC32_DUALEDGE */ /* XXX untested */ 64 65 /* 66 * Auto param loading does not work properly (it partially works (works on 67 * start, doesn't on restart) on rev 0x54, it doesn't work at all on rev 0x51), 68 * and it doesn't improve the performance so much, 69 * forget about it. 70 */ 71 #undef NJSC32_AUTOPARAM 72 73 #include <dev/ic/ninjascsi32reg.h> 74 #include <dev/ic/ninjascsi32var.h> 75 76 /* #define NJSC32_DEBUG */ 77 /* #define NJSC32_TRACE */ 78 79 #ifdef NJSC32_DEBUG 80 #define DPRINTF(x) printf x 81 #define DPRINTC(cmd, x) PRINTC(cmd, x) 82 #else 83 #define DPRINTF(x) 84 #define DPRINTC(cmd, x) 85 #endif 86 #ifdef NJSC32_TRACE 87 #define TPRINTF(x) printf x 88 #define TPRINTC(cmd, x) PRINTC(cmd, x) 89 #else 90 #define TPRINTF(x) 91 #define TPRINTC(cmd, x) 92 #endif 93 94 #define PRINTC(cmd, x) do { \ 95 scsi_print_addr((cmd)->c_xs->xs_periph); \ 96 printf x; \ 97 } while (/* CONSTCOND */ 0) 98 99 static void njsc32_scsipi_request(struct scsipi_channel *, 100 scsipi_adapter_req_t, void *); 101 static void njsc32_scsipi_minphys(struct buf *buf); 102 static int njsc32_scsipi_ioctl(struct scsipi_channel *, u_long, caddr_t, 103 int, struct proc *); 104 105 static void njsc32_init(struct njsc32_softc *, int nosleep); 106 static int njsc32_init_cmds(struct njsc32_softc *); 107 static void njsc32_target_async(struct njsc32_softc *, 108 struct njsc32_target *); 109 static void njsc32_init_targets(struct njsc32_softc *); 110 static void njsc32_add_msgout(struct njsc32_softc *, int); 111 static u_int32_t njsc32_get_auto_msgout(struct njsc32_softc *); 112 #ifdef NJSC32_DUALEDGE 113 static void njsc32_msgout_wdtr(struct njsc32_softc *, int); 114 #endif 115 static void njsc32_msgout_sdtr(struct njsc32_softc *, int period, 116 int offset); 117 static void njsc32_negotiate_xfer(struct njsc32_softc *, 118 struct njsc32_target *); 119 static void njsc32_arbitration_failed(struct njsc32_softc *); 120 static void njsc32_start(struct njsc32_softc *); 121 static void njsc32_run_xfer(struct njsc32_softc *, struct scsipi_xfer *); 122 static void njsc32_end_cmd(struct njsc32_softc *, struct njsc32_cmd *, 123 scsipi_xfer_result_t); 124 static void njsc32_reset_bus(struct njsc32_softc *); 125 static void njsc32_clear_cmds(struct njsc32_softc *, 126 scsipi_xfer_result_t); 127 static void njsc32_reset_detected(struct njsc32_softc *); 128 static void njsc32_set_ptr(struct njsc32_softc *, struct njsc32_cmd *, 129 u_int32_t); 130 static void njsc32_assert_ack(struct njsc32_softc *); 131 static void njsc32_negate_ack(struct njsc32_softc *); 132 static void njsc32_wait_req_negate(struct njsc32_softc *); 133 static void njsc32_reconnect(struct njsc32_softc *, struct njsc32_cmd *); 134 enum njsc32_reselstat { 135 NJSC32_RESEL_ERROR, /* to be rejected */ 136 NJSC32_RESEL_COMPLETE, /* reselection is just complete */ 137 NJSC32_RESEL_THROUGH /* this message is OK (no reply) */ 138 }; 139 static enum njsc32_reselstat njsc32_resel_identify(struct njsc32_softc *, 140 int lun, struct njsc32_cmd **); 141 static enum njsc32_reselstat njsc32_resel_tag(struct njsc32_softc *, 142 int tag, struct njsc32_cmd **); 143 static void njsc32_cmd_reload(struct njsc32_softc *, struct njsc32_cmd *, 144 int); 145 static void njsc32_update_xfer_mode(struct njsc32_softc *, 146 struct njsc32_target *); 147 static void njsc32_msgin(struct njsc32_softc *); 148 static void njsc32_msgout(struct njsc32_softc *); 149 static void njsc32_cmdtimeout(void *); 150 static void njsc32_reseltimeout(void *); 151 152 static __inline unsigned 153 njsc32_read_1(struct njsc32_softc *sc, int no) 154 { 155 156 return bus_space_read_1(sc->sc_regt, sc->sc_regh, no); 157 } 158 159 static __inline unsigned 160 njsc32_read_2(struct njsc32_softc *sc, int no) 161 { 162 163 return bus_space_read_2(sc->sc_regt, sc->sc_regh, no); 164 } 165 166 static __inline u_int32_t 167 njsc32_read_4(struct njsc32_softc *sc, int no) 168 { 169 170 return bus_space_read_4(sc->sc_regt, sc->sc_regh, no); 171 } 172 173 static __inline void 174 njsc32_write_1(struct njsc32_softc *sc, int no, int val) 175 { 176 177 bus_space_write_1(sc->sc_regt, sc->sc_regh, no, val); 178 } 179 180 static __inline void 181 njsc32_write_2(struct njsc32_softc *sc, int no, int val) 182 { 183 184 bus_space_write_2(sc->sc_regt, sc->sc_regh, no, val); 185 } 186 187 static __inline void 188 njsc32_write_4(struct njsc32_softc *sc, int no, u_int32_t val) 189 { 190 191 bus_space_write_4(sc->sc_regt, sc->sc_regh, no, val); 192 } 193 194 static __inline unsigned 195 njsc32_ireg_read_1(struct njsc32_softc *sc, int no) 196 { 197 198 bus_space_write_1(sc->sc_regt, sc->sc_regh, NJSC32_REG_INDEX, no); 199 return bus_space_read_1(sc->sc_regt, sc->sc_regh, NJSC32_REG_DATA_LOW); 200 } 201 202 static __inline unsigned 203 njsc32_ireg_read_2(struct njsc32_softc *sc, int no) 204 { 205 206 bus_space_write_1(sc->sc_regt, sc->sc_regh, NJSC32_REG_INDEX, no); 207 return bus_space_read_2(sc->sc_regt, sc->sc_regh, NJSC32_REG_DATA_LOW); 208 } 209 210 static __inline u_int32_t 211 njsc32_ireg_read_4(struct njsc32_softc *sc, int no) 212 { 213 u_int32_t val; 214 215 bus_space_write_1(sc->sc_regt, sc->sc_regh, NJSC32_REG_INDEX, no); 216 val = (u_int16_t)bus_space_read_2(sc->sc_regt, sc->sc_regh, 217 NJSC32_REG_DATA_LOW); 218 return val | (bus_space_read_2(sc->sc_regt, sc->sc_regh, 219 NJSC32_REG_DATA_HIGH) << 16); 220 } 221 222 static __inline void 223 njsc32_ireg_write_1(struct njsc32_softc *sc, int no, int val) 224 { 225 226 bus_space_write_1(sc->sc_regt, sc->sc_regh, NJSC32_REG_INDEX, no); 227 bus_space_write_1(sc->sc_regt, sc->sc_regh, NJSC32_REG_DATA_LOW, val); 228 } 229 230 static __inline void 231 njsc32_ireg_write_2(struct njsc32_softc *sc, int no, int val) 232 { 233 234 bus_space_write_1(sc->sc_regt, sc->sc_regh, NJSC32_REG_INDEX, no); 235 bus_space_write_2(sc->sc_regt, sc->sc_regh, NJSC32_REG_DATA_LOW, val); 236 } 237 238 static __inline void 239 njsc32_ireg_write_4(struct njsc32_softc *sc, int no, u_int32_t val) 240 { 241 242 bus_space_write_1(sc->sc_regt, sc->sc_regh, NJSC32_REG_INDEX, no); 243 bus_space_write_2(sc->sc_regt, sc->sc_regh, NJSC32_REG_DATA_LOW, val); 244 bus_space_write_2(sc->sc_regt, sc->sc_regh, NJSC32_REG_DATA_HIGH, 245 val >> 16); 246 } 247 248 #define NS(ns) ((ns) / 4) /* nanosecond (>= 50) -> sync value */ 249 #ifdef __STDC__ 250 # define ACKW(n) NJSC32_ACK_WIDTH_ ## n ## CLK 251 # define SMPL(n) (NJSC32_SREQ_SAMPLING_ ## n ## CLK | \ 252 NJSC32_SREQ_SAMPLING_ENABLE) 253 #else 254 # define ACKW(n) NJSC32_ACK_WIDTH_/**/n/**/CLK 255 # define SMPL(n) (NJSC32_SREQ_SAMPLING_/**/n/**/CLK | \ 256 NJSC32_SREQ_SAMPLING_ENABLE) 257 #endif 258 259 #define NJSC32_NSYNCT_MAXSYNC 1 260 #define NJSC32_NSYNCT 16 261 262 /* 40MHz (25ns) */ 263 static const struct njsc32_sync_param njsc32_synct_40M[NJSC32_NSYNCT] = { 264 { 0, 0, 0 }, /* dummy for async */ 265 { NS( 50), ACKW(1), 0 }, /* 20.0 : 50ns, 25ns */ 266 { NS( 75), ACKW(1), SMPL(1) }, /* 13.3 : 75ns, 25ns */ 267 { NS(100), ACKW(2), SMPL(1) }, /* 10.0 : 100ns, 50ns */ 268 { NS(125), ACKW(2), SMPL(2) }, /* 8.0 : 125ns, 50ns */ 269 { NS(150), ACKW(3), SMPL(2) }, /* 6.7 : 150ns, 75ns */ 270 { NS(175), ACKW(3), SMPL(2) }, /* 5.7 : 175ns, 75ns */ 271 { NS(200), ACKW(4), SMPL(2) }, /* 5.0 : 200ns, 100ns */ 272 { NS(225), ACKW(4), SMPL(4) }, /* 4.4 : 225ns, 100ns */ 273 { NS(250), ACKW(4), SMPL(4) }, /* 4.0 : 250ns, 100ns */ 274 { NS(275), ACKW(4), SMPL(4) }, /* 3.64: 275ns, 100ns */ 275 { NS(300), ACKW(4), SMPL(4) }, /* 3.33: 300ns, 100ns */ 276 { NS(325), ACKW(4), SMPL(4) }, /* 3.01: 325ns, 100ns */ 277 { NS(350), ACKW(4), SMPL(4) }, /* 2.86: 350ns, 100ns */ 278 { NS(375), ACKW(4), SMPL(4) }, /* 2.67: 375ns, 100ns */ 279 { NS(400), ACKW(4), SMPL(4) } /* 2.50: 400ns, 100ns */ 280 }; 281 282 #ifdef NJSC32_SUPPORT_OTHER_CLOCKS 283 /* 20MHz (50ns) */ 284 static const struct njsc32_sync_param njsc32_synct_20M[NJSC32_NSYNCT] = { 285 { 0, 0, 0 }, /* dummy for async */ 286 { NS(100), ACKW(1), 0 }, /* 10.0 : 100ns, 50ns */ 287 { NS(150), ACKW(1), SMPL(2) }, /* 6.7 : 150ns, 50ns */ 288 { NS(200), ACKW(2), SMPL(2) }, /* 5.0 : 200ns, 100ns */ 289 { NS(250), ACKW(2), SMPL(4) }, /* 4.0 : 250ns, 100ns */ 290 { NS(300), ACKW(3), SMPL(4) }, /* 3.3 : 300ns, 150ns */ 291 { NS(350), ACKW(3), SMPL(4) }, /* 2.8 : 350ns, 150ns */ 292 { NS(400), ACKW(4), SMPL(4) }, /* 2.5 : 400ns, 200ns */ 293 { NS(450), ACKW(4), SMPL(4) }, /* 2.2 : 450ns, 200ns */ 294 { NS(500), ACKW(4), SMPL(4) }, /* 2.0 : 500ns, 200ns */ 295 { NS(550), ACKW(4), SMPL(4) }, /* 1.82: 550ns, 200ns */ 296 { NS(600), ACKW(4), SMPL(4) }, /* 1.67: 600ns, 200ns */ 297 { NS(650), ACKW(4), SMPL(4) }, /* 1.54: 650ns, 200ns */ 298 { NS(700), ACKW(4), SMPL(4) }, /* 1.43: 700ns, 200ns */ 299 { NS(750), ACKW(4), SMPL(4) }, /* 1.33: 750ns, 200ns */ 300 { NS(800), ACKW(4), SMPL(4) } /* 1.25: 800ns, 200ns */ 301 }; 302 303 /* 33.3MHz (30ns) */ 304 static const struct njsc32_sync_param njsc32_synct_pci[NJSC32_NSYNCT] = { 305 { 0, 0, 0 }, /* dummy for async */ 306 { NS( 60), ACKW(1), 0 }, /* 16.6 : 60ns, 30ns */ 307 { NS( 90), ACKW(1), SMPL(1) }, /* 11.1 : 90ns, 30ns */ 308 { NS(120), ACKW(2), SMPL(2) }, /* 8.3 : 120ns, 60ns */ 309 { NS(150), ACKW(2), SMPL(2) }, /* 6.7 : 150ns, 60ns */ 310 { NS(180), ACKW(3), SMPL(2) }, /* 5.6 : 180ns, 90ns */ 311 { NS(210), ACKW(3), SMPL(4) }, /* 4.8 : 210ns, 90ns */ 312 { NS(240), ACKW(4), SMPL(4) }, /* 4.2 : 240ns, 120ns */ 313 { NS(270), ACKW(4), SMPL(4) }, /* 3.7 : 270ns, 120ns */ 314 { NS(300), ACKW(4), SMPL(4) }, /* 3.3 : 300ns, 120ns */ 315 { NS(330), ACKW(4), SMPL(4) }, /* 3.0 : 330ns, 120ns */ 316 { NS(360), ACKW(4), SMPL(4) }, /* 2.8 : 360ns, 120ns */ 317 { NS(390), ACKW(4), SMPL(4) }, /* 2.6 : 390ns, 120ns */ 318 { NS(420), ACKW(4), SMPL(4) }, /* 2.4 : 420ns, 120ns */ 319 { NS(450), ACKW(4), SMPL(4) }, /* 2.2 : 450ns, 120ns */ 320 { NS(480), ACKW(4), SMPL(4) } /* 2.1 : 480ns, 120ns */ 321 }; 322 #endif /* NJSC32_SUPPORT_OTHER_CLOCKS */ 323 324 #undef NS 325 #undef ACKW 326 #undef SMPL 327 328 /* initialize device */ 329 static void 330 njsc32_init(struct njsc32_softc *sc, int nosleep) 331 { 332 u_int16_t intstat; 333 334 /* block all interrupts */ 335 njsc32_write_2(sc, NJSC32_REG_IRQ, NJSC32_IRQ_MASK_ALL); 336 337 /* clear transfer */ 338 njsc32_write_2(sc, NJSC32_REG_TRANSFER, 0); 339 njsc32_write_4(sc, NJSC32_REG_BM_CNT, 0); 340 341 /* make sure interrupts are cleared */ 342 /* XXX loop forever? */ 343 while ((intstat = njsc32_read_2(sc, NJSC32_REG_IRQ)) & 344 NJSC32_IRQ_INTR_PENDING) { 345 DPRINTF(("%s: njsc32_init: intr pending: %#x\n", 346 sc->sc_dev.dv_xname, intstat)); 347 } 348 349 /* FIFO threshold */ 350 njsc32_ireg_write_1(sc, NJSC32_IREG_FIFO_THRESHOLD_FULL, 351 NJSC32_FIFO_FULL_BUSMASTER); 352 njsc32_ireg_write_1(sc, NJSC32_IREG_FIFO_THRESHOLD_EMPTY, 353 NJSC32_FIFO_EMPTY_BUSMASTER); 354 355 /* clock source */ 356 njsc32_ireg_write_1(sc, NJSC32_IREG_CLOCK, sc->sc_clk); 357 358 /* memory read multiple */ 359 njsc32_ireg_write_1(sc, NJSC32_IREG_BM, 360 NJSC32_BM_MEMRD_CMD1 | NJSC32_BM_SGT_AUTO_PARA_MEMRD_CMD); 361 362 /* clear parity error and enable parity detection */ 363 njsc32_write_1(sc, NJSC32_REG_PARITY_CONTROL, 364 NJSC32_PARITYCTL_CHECK_ENABLE | NJSC32_PARITYCTL_CLEAR_ERROR); 365 366 /* misc configuration */ 367 njsc32_ireg_write_2(sc, NJSC32_IREG_MISC, 368 NJSC32_MISC_SCSI_DIRECTION_DETECTOR_SELECT | 369 NJSC32_MISC_DELAYED_BMSTART | 370 NJSC32_MISC_MASTER_TERMINATION_SELECT | 371 NJSC32_MISC_BMREQ_NEGATE_TIMING_SEL | 372 NJSC32_MISC_AUTOSEL_TIMING_SEL | 373 NJSC32_MISC_BMSTOP_CHANGE2_NONDATA_PHASE); 374 375 /* 376 * Check for termination power (32Bi only?). 377 */ 378 if (!nosleep || cold) { 379 DPRINTF(("%s: njsc32_init: checking TERMPWR\n", 380 sc->sc_dev.dv_xname)); 381 382 /* First, turn termination power off */ 383 njsc32_ireg_write_1(sc, NJSC32_IREG_TERM_PWR, 0); 384 385 /* give 0.5s to settle */ 386 if (nosleep) 387 delay(500000); 388 else 389 tsleep(sc, PWAIT, "njs_t1", hz / 2); 390 } 391 392 /* supply termination power if not supplied by other devices */ 393 if ((njsc32_ireg_read_1(sc, NJSC32_IREG_TERM_PWR) & 394 NJSC32_TERMPWR_SENSE) == 0) { 395 /* termination power is not present on the bus */ 396 if (sc->sc_flags & NJSC32_CANNOT_SUPPLY_TERMPWR) { 397 /* 398 * CardBus device must not supply termination power 399 * to avoid excessive power consumption. 400 */ 401 printf("%s: no termination power present\n", 402 sc->sc_dev.dv_xname); 403 } else { 404 /* supply termination power */ 405 njsc32_ireg_write_1(sc, NJSC32_IREG_TERM_PWR, 406 NJSC32_TERMPWR_BPWR); 407 408 DPRINTF(("%s: supplying termination power\n", 409 sc->sc_dev.dv_xname)); 410 411 /* give 0.5s to settle */ 412 if (!nosleep) 413 tsleep(sc, PWAIT, "njs_t2", hz / 2); 414 } 415 } 416 417 /* stop timer */ 418 njsc32_write_2(sc, NJSC32_REG_TIMER, NJSC32_TIMER_STOP); 419 njsc32_write_2(sc, NJSC32_REG_TIMER, NJSC32_TIMER_STOP); 420 421 /* default transfer parameter */ 422 njsc32_write_1(sc, NJSC32_REG_SYNC, 0); 423 njsc32_write_1(sc, NJSC32_REG_ACK_WIDTH, NJSC32_ACK_WIDTH_1CLK); 424 njsc32_write_2(sc, NJSC32_REG_SEL_TIMEOUT, 425 NJSC32_SEL_TIMEOUT_TIME); 426 427 /* select interrupt source */ 428 njsc32_ireg_write_2(sc, NJSC32_IREG_IRQ_SELECT, 429 NJSC32_IRQSEL_RESELECT | 430 NJSC32_IRQSEL_PHASE_CHANGE | 431 NJSC32_IRQSEL_SCSIRESET | 432 NJSC32_IRQSEL_TIMER | 433 NJSC32_IRQSEL_FIFO_THRESHOLD | 434 NJSC32_IRQSEL_TARGET_ABORT | 435 NJSC32_IRQSEL_MASTER_ABORT | 436 /* XXX not yet 437 NJSC32_IRQSEL_SERR | 438 NJSC32_IRQSEL_PERR | 439 NJSC32_IRQSEL_BMCNTERR | 440 */ 441 NJSC32_IRQSEL_AUTO_SCSI_SEQ); 442 443 /* unblock interrupts */ 444 njsc32_write_2(sc, NJSC32_REG_IRQ, 0); 445 446 /* turn LED off */ 447 njsc32_ireg_write_1(sc, NJSC32_IREG_EXT_PORT_DDR, 448 NJSC32_EXTPORT_LED_OFF); 449 njsc32_ireg_write_1(sc, NJSC32_IREG_EXT_PORT, 450 NJSC32_EXTPORT_LED_OFF); 451 452 /* reset SCSI bus so the targets become known state */ 453 njsc32_reset_bus(sc); 454 } 455 456 static int 457 njsc32_init_cmds(struct njsc32_softc *sc) 458 { 459 struct njsc32_cmd *cmd; 460 bus_addr_t dmaaddr; 461 int i, error; 462 463 /* 464 * allocate DMA area for command 465 */ 466 if ((error = bus_dmamem_alloc(sc->sc_dmat, 467 sizeof(struct njsc32_dma_page), PAGE_SIZE, 0, 468 &sc->sc_cmdpg_seg, 1, &sc->sc_cmdpg_nsegs, BUS_DMA_NOWAIT)) != 0) { 469 printf("%s: unable to allocate cmd page, error = %d\n", 470 sc->sc_dev.dv_xname, error); 471 return 0; 472 } 473 if ((error = bus_dmamem_map(sc->sc_dmat, &sc->sc_cmdpg_seg, 474 sc->sc_cmdpg_nsegs, sizeof(struct njsc32_dma_page), 475 (caddr_t *)&sc->sc_cmdpg, 476 BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) { 477 printf("%s: unable to map cmd page, error = %d\n", 478 sc->sc_dev.dv_xname, error); 479 goto fail1; 480 } 481 if ((error = bus_dmamap_create(sc->sc_dmat, 482 sizeof(struct njsc32_dma_page), 1, 483 sizeof(struct njsc32_dma_page), 0, BUS_DMA_NOWAIT, 484 &sc->sc_dmamap_cmdpg)) != 0) { 485 printf("%s: unable to create cmd DMA map, error = %d\n", 486 sc->sc_dev.dv_xname, error); 487 goto fail2; 488 } 489 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_cmdpg, 490 sc->sc_cmdpg, sizeof(struct njsc32_dma_page), 491 NULL, BUS_DMA_NOWAIT)) != 0) { 492 printf("%s: unable to load cmd DMA map, error = %d\n", 493 sc->sc_dev.dv_xname, error); 494 goto fail3; 495 } 496 497 memset(sc->sc_cmdpg, 0, sizeof(struct njsc32_dma_page)); 498 dmaaddr = sc->sc_dmamap_cmdpg->dm_segs[0].ds_addr; 499 500 #ifdef NJSC32_AUTOPARAM 501 sc->sc_ap_dma = dmaaddr + offsetof(struct njsc32_dma_page, dp_ap); 502 #endif 503 504 for (i = 0; i < NJSC32_NUM_CMD; i++) { 505 cmd = &sc->sc_cmds[i]; 506 cmd->c_sc = sc; 507 cmd->c_sgt = sc->sc_cmdpg->dp_sg[i]; 508 cmd->c_sgt_dma = dmaaddr + 509 offsetof(struct njsc32_dma_page, dp_sg[i]); 510 cmd->c_flags = 0; 511 512 error = bus_dmamap_create(sc->sc_dmat, 513 NJSC32_MAX_XFER, /* max total map size */ 514 NJSC32_NUM_SG, /* max number of segments */ 515 NJSC32_SGT_MAXSEGLEN, /* max size of a segment */ 516 0, /* boundary */ 517 BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &cmd->c_dmamap_xfer); 518 if (error) { 519 printf("%s: only %d cmd descs available (error = %d)\n", 520 sc->sc_dev.dv_xname, i, error); 521 break; 522 } 523 TAILQ_INSERT_TAIL(&sc->sc_freecmd, cmd, c_q); 524 } 525 526 if (i > 0) 527 return i; 528 529 fail3: bus_dmamap_destroy(sc->sc_dmat, sc->sc_dmamap_cmdpg); 530 fail2: bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_cmdpg, 531 sizeof(struct njsc32_dma_page)); 532 fail1: bus_dmamem_free(sc->sc_dmat, &sc->sc_cmdpg_seg, sc->sc_cmdpg_nsegs); 533 534 return 0; 535 } 536 537 static void 538 njsc32_target_async(struct njsc32_softc *sc, struct njsc32_target *target) 539 { 540 541 target->t_sync = 542 NJSC32_SYNC_VAL(sc->sc_sync_max, NJSC32_SYNCOFFSET_ASYNC); 543 target->t_ackwidth = NJSC32_ACK_WIDTH_1CLK; 544 target->t_sample = 0; /* disable */ 545 target->t_syncoffset = NJSC32_SYNCOFFSET_ASYNC; 546 target->t_syncperiod = NJSC32_SYNCPERIOD_ASYNC; 547 } 548 549 static void 550 njsc32_init_targets(struct njsc32_softc *sc) 551 { 552 int id, lun; 553 struct njsc32_lu *lu; 554 555 for (id = 0; id <= NJSC32_MAX_TARGET_ID; id++) { 556 /* cancel negotiation status */ 557 sc->sc_targets[id].t_state = NJSC32_TARST_INIT; 558 559 /* default to async mode */ 560 njsc32_target_async(sc, &sc->sc_targets[id]); 561 562 #ifdef NJSC32_DUALEDGE 563 sc->sc_targets[id].t_xferctl = 0; 564 #endif 565 566 sc->sc_targets[id].t_targetid = 567 (1 << id) | (1 << NJSC32_INITIATOR_ID); 568 569 /* init logical units */ 570 for (lun = 0; lun < NJSC32_NLU; lun++) { 571 lu = &sc->sc_targets[id].t_lus[lun]; 572 lu->lu_cmd = NULL; 573 TAILQ_INIT(&lu->lu_q); 574 } 575 } 576 } 577 578 void 579 njsc32_attach(struct njsc32_softc *sc) 580 { 581 const char *str; 582 #if 1 /* test */ 583 int reg; 584 njsc32_model_t detected_model; 585 #endif 586 587 /* init */ 588 TAILQ_INIT(&sc->sc_freecmd); 589 TAILQ_INIT(&sc->sc_reqcmd); 590 591 #if 1 /* test */ 592 /* 593 * try to distinguish 32Bi and 32UDE 594 */ 595 /* try to set DualEdge bit (exists on 32UDE only) and read it back */ 596 njsc32_write_2(sc, NJSC32_REG_TRANSFER, NJSC32_XFR_DUALEDGE_ENABLE); 597 if ((reg = njsc32_read_2(sc, NJSC32_REG_TRANSFER)) == 0xffff) { 598 /* device was removed? */ 599 aprint_error("%s: attach failed\n", sc->sc_dev.dv_xname); 600 return; 601 } else if (reg & NJSC32_XFR_DUALEDGE_ENABLE) { 602 detected_model = NJSC32_MODEL_32UDE | NJSC32_FLAG_DUALEDGE; 603 } else { 604 detected_model = NJSC32_MODEL_32BI; 605 } 606 njsc32_write_2(sc, NJSC32_REG_TRANSFER, 0); /* restore */ 607 608 #if 1/*def DIAGNOSTIC*/ 609 /* compare what is configured with what is detected */ 610 if ((sc->sc_model & NJSC32_MODEL_MASK) != 611 (detected_model & NJSC32_MODEL_MASK)) { 612 /* 613 * Please report this error if it happens. 614 */ 615 aprint_error("%s: model mismatch: %#x vs %#x\n", 616 sc->sc_dev.dv_xname, sc->sc_model, detected_model); 617 return; 618 } 619 #endif 620 #endif 621 622 /* check model */ 623 switch (sc->sc_model & NJSC32_MODEL_MASK) { 624 case NJSC32_MODEL_32BI: 625 str = "Bi"; 626 /* 32Bi doesn't support DualEdge transfer */ 627 KASSERT((sc->sc_model & NJSC32_FLAG_DUALEDGE) == 0); 628 break; 629 case NJSC32_MODEL_32UDE: 630 str = "UDE"; 631 break; 632 default: 633 aprint_error("%s: unknown model!\n", sc->sc_dev.dv_xname); 634 return; 635 } 636 aprint_normal("%s: NJSC-32%s", sc->sc_dev.dv_xname, str); 637 638 switch (sc->sc_clk) { 639 default: 640 #ifdef DIAGNOSTIC 641 panic("njsc32_attach: unknown clk %d", sc->sc_clk); 642 #endif 643 case NJSC32_CLOCK_DIV_4: 644 sc->sc_synct = njsc32_synct_40M; 645 str = "40MHz"; 646 break; 647 #ifdef NJSC32_SUPPORT_OTHER_CLOCKS 648 case NJSC32_CLOCK_DIV_2: 649 sc->sc_synct = njsc32_synct_20M; 650 str = "20MHz"; 651 break; 652 case NJSC32_CLOCK_PCICLK: 653 sc->sc_synct = njsc32_synct_pci; 654 str = "PCI"; 655 break; 656 #endif 657 } 658 aprint_normal(", G/A rev %#x, clk %s%s\n", 659 NJSC32_INDEX_GAREV(njsc32_read_2(sc, NJSC32_REG_INDEX)), str, 660 (sc->sc_model & NJSC32_FLAG_DUALEDGE) ? 661 #ifdef NJSC32_DUALEDGE 662 ", DualEdge" 663 #else 664 ", DualEdge (no driver support)" 665 #endif 666 : ""); 667 668 /* allocate DMA resource */ 669 if ((sc->sc_ncmd = njsc32_init_cmds(sc)) == 0) { 670 printf("%s: no usable DMA map\n", sc->sc_dev.dv_xname); 671 return; 672 } 673 sc->sc_flags |= NJSC32_CMDPG_MAPPED; 674 675 sc->sc_curcmd = NULL; 676 sc->sc_nusedcmds = 0; 677 sc->sc_stat = NJSC32_STAT_IDLE; 678 679 sc->sc_sync_max = 1; /* XXX look up EEPROM configuration? */ 680 681 /* initialize target structure */ 682 njsc32_init_targets(sc); 683 684 /* initialize hardware */ 685 njsc32_init(sc, cold); 686 687 /* setup adapter */ 688 sc->sc_adapter.adapt_dev = &sc->sc_dev; 689 sc->sc_adapter.adapt_nchannels = 1; 690 sc->sc_adapter.adapt_request = njsc32_scsipi_request; 691 sc->sc_adapter.adapt_minphys = njsc32_scsipi_minphys; 692 sc->sc_adapter.adapt_ioctl = njsc32_scsipi_ioctl; 693 694 sc->sc_adapter.adapt_max_periph = sc->sc_adapter.adapt_openings = 695 sc->sc_ncmd; 696 697 /* setup channel */ 698 sc->sc_channel.chan_adapter = &sc->sc_adapter; 699 sc->sc_channel.chan_bustype = &scsi_bustype; 700 sc->sc_channel.chan_channel = 0; 701 sc->sc_channel.chan_ntargets = NJSC32_NTARGET; 702 sc->sc_channel.chan_nluns = NJSC32_NLU; 703 sc->sc_channel.chan_id = NJSC32_INITIATOR_ID; 704 705 sc->sc_scsi = config_found(&sc->sc_dev, &sc->sc_channel, scsiprint); 706 } 707 708 int 709 njsc32_detach(struct njsc32_softc *sc, int flags) 710 { 711 int rv = 0; 712 int i, s; 713 struct njsc32_cmd *cmd; 714 715 s = splbio(); 716 717 /* clear running/disconnected commands */ 718 njsc32_clear_cmds(sc, XS_DRIVER_STUFFUP); 719 720 sc->sc_stat = NJSC32_STAT_DETACH; 721 722 /* clear pending commands */ 723 while ((cmd = TAILQ_FIRST(&sc->sc_reqcmd)) != NULL) { 724 TAILQ_REMOVE(&sc->sc_reqcmd, cmd, c_q); 725 njsc32_end_cmd(sc, cmd, XS_RESET); 726 } 727 728 if (sc->sc_scsi != NULL) 729 rv = config_detach(sc->sc_scsi, flags); 730 731 splx(s); 732 733 /* free DMA resource */ 734 if (sc->sc_flags & NJSC32_CMDPG_MAPPED) { 735 for (i = 0; i < sc->sc_ncmd; i++) { 736 cmd = &sc->sc_cmds[i]; 737 if (cmd->c_flags & NJSC32_CMD_DMA_MAPPED) 738 bus_dmamap_unload(sc->sc_dmat, 739 cmd->c_dmamap_xfer); 740 bus_dmamap_destroy(sc->sc_dmat, cmd->c_dmamap_xfer); 741 } 742 743 bus_dmamap_unload(sc->sc_dmat, sc->sc_dmamap_cmdpg); 744 bus_dmamap_destroy(sc->sc_dmat, sc->sc_dmamap_cmdpg); 745 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_cmdpg, 746 sizeof(struct njsc32_dma_page)); 747 bus_dmamem_free(sc->sc_dmat, &sc->sc_cmdpg_seg, 748 sc->sc_cmdpg_nsegs); 749 } 750 751 return 0; 752 } 753 754 static __inline void 755 njsc32_cmd_init(struct njsc32_cmd *cmd) 756 { 757 758 cmd->c_flags = 0; 759 760 /* scatter/gather table */ 761 cmd->c_sgtdmaaddr = NJSC32_CMD_DMAADDR_SGT(cmd, 0); 762 cmd->c_sgoffset = 0; 763 cmd->c_sgfixcnt = 0; 764 765 /* data pointer */ 766 cmd->c_dp_cur = cmd->c_dp_saved = cmd->c_dp_max = 0; 767 } 768 769 static __inline void 770 njsc32_init_msgout(struct njsc32_softc *sc) 771 { 772 773 sc->sc_msgoutlen = 0; 774 sc->sc_msgoutidx = 0; 775 } 776 777 static void 778 njsc32_add_msgout(struct njsc32_softc *sc, int byte) 779 { 780 781 if (sc->sc_msgoutlen >= NJSC32_MSGOUT_LEN) { 782 printf("njsc32_add_msgout: too many\n"); 783 return; 784 } 785 sc->sc_msgout[sc->sc_msgoutlen++] = byte; 786 } 787 788 static u_int32_t 789 njsc32_get_auto_msgout(struct njsc32_softc *sc) 790 { 791 u_int32_t val; 792 u_int8_t *p; 793 794 val = 0; 795 p = sc->sc_msgout; 796 switch (sc->sc_msgoutlen) { 797 /* 31-24 23-16 15-8 7 ... 1 0 */ 798 case 3: /* MSG3 MSG2 MSG1 V --- cnt */ 799 val |= *p++ << NJSC32_MSGOUT_MSG1_SHIFT; 800 /* FALLTHROUGH */ 801 802 case 2: /* MSG2 MSG1 --- V --- cnt */ 803 val |= *p++ << NJSC32_MSGOUT_MSG2_SHIFT; 804 /* FALLTHROUGH */ 805 806 case 1: /* MSG1 --- --- V --- cnt */ 807 val |= *p++ << NJSC32_MSGOUT_MSG3_SHIFT; 808 val |= NJSC32_MSGOUT_VALID | sc->sc_msgoutlen; 809 break; 810 811 default: 812 break; 813 } 814 return val; 815 } 816 817 #ifdef NJSC32_DUALEDGE 818 /* add Wide Data Transfer Request to the next Message Out */ 819 static void 820 njsc32_msgout_wdtr(struct njsc32_softc *sc, int width) 821 { 822 823 njsc32_add_msgout(sc, MSG_EXTENDED); 824 njsc32_add_msgout(sc, MSG_EXT_WDTR_LEN); 825 njsc32_add_msgout(sc, MSG_EXT_WDTR); 826 njsc32_add_msgout(sc, width); 827 } 828 #endif 829 830 /* add Synchronous Data Transfer Request to the next Message Out */ 831 static void 832 njsc32_msgout_sdtr(struct njsc32_softc *sc, int period, int offset) 833 { 834 835 njsc32_add_msgout(sc, MSG_EXTENDED); 836 njsc32_add_msgout(sc, MSG_EXT_SDTR_LEN); 837 njsc32_add_msgout(sc, MSG_EXT_SDTR); 838 njsc32_add_msgout(sc, period); 839 njsc32_add_msgout(sc, offset); 840 } 841 842 static void 843 njsc32_negotiate_xfer(struct njsc32_softc *sc, struct njsc32_target *target) 844 { 845 846 /* initial negotiation state */ 847 if (target->t_state == NJSC32_TARST_INIT) { 848 #ifdef NJSC32_DUALEDGE 849 if (target->t_flags & NJSC32_TARF_DE) 850 target->t_state = NJSC32_TARST_DE; 851 else 852 #endif 853 if (target->t_flags & NJSC32_TARF_SYNC) 854 target->t_state = NJSC32_TARST_SDTR; 855 else 856 target->t_state = NJSC32_TARST_DONE; 857 } 858 859 switch (target->t_state) { 860 default: 861 case NJSC32_TARST_INIT: 862 #ifdef DIAGNOSTIC 863 panic("njsc32_negotiate_xfer"); 864 /* NOTREACHED */ 865 #endif 866 /* FALLTHROUGH */ 867 case NJSC32_TARST_DONE: 868 /* no more work */ 869 break; 870 871 #ifdef NJSC32_DUALEDGE 872 case NJSC32_TARST_DE: 873 njsc32_msgout_wdtr(sc, 0xde /* XXX? */); 874 break; 875 876 case NJSC32_TARST_WDTR: 877 njsc32_msgout_wdtr(sc, MSG_EXT_WDTR_BUS_8_BIT); 878 break; 879 #endif 880 881 case NJSC32_TARST_SDTR: 882 njsc32_msgout_sdtr(sc, sc->sc_synct[sc->sc_sync_max].sp_period, 883 NJSC32_SYNCOFFSET_MAX); 884 break; 885 886 case NJSC32_TARST_ASYNC: 887 njsc32_msgout_sdtr(sc, NJSC32_SYNCPERIOD_ASYNC, 888 NJSC32_SYNCOFFSET_ASYNC); 889 break; 890 } 891 } 892 893 /* turn LED on */ 894 static __inline void 895 njsc32_led_on(struct njsc32_softc *sc) 896 { 897 898 njsc32_ireg_write_1(sc, NJSC32_IREG_EXT_PORT, NJSC32_EXTPORT_LED_ON); 899 } 900 901 /* turn LED off */ 902 static __inline void 903 njsc32_led_off(struct njsc32_softc *sc) 904 { 905 906 njsc32_ireg_write_1(sc, NJSC32_IREG_EXT_PORT, NJSC32_EXTPORT_LED_OFF); 907 } 908 909 static void 910 njsc32_arbitration_failed(struct njsc32_softc *sc) 911 { 912 struct njsc32_cmd *cmd; 913 914 if ((cmd = sc->sc_curcmd) == NULL || sc->sc_stat != NJSC32_STAT_ARBIT) 915 return; 916 917 if ((cmd->c_xs->xs_control & XS_CTL_POLL) == 0) 918 callout_stop(&cmd->c_xs->xs_callout); 919 920 sc->sc_stat = NJSC32_STAT_IDLE; 921 sc->sc_curcmd = NULL; 922 923 /* the command is no longer active */ 924 if (--sc->sc_nusedcmds == 0) 925 njsc32_led_off(sc); 926 } 927 928 static __inline void 929 njsc32_cmd_load(struct njsc32_softc *sc, struct njsc32_cmd *cmd) 930 { 931 struct njsc32_target *target; 932 struct scsipi_xfer *xs; 933 int i, control, lun; 934 u_int32_t msgoutreg; 935 #ifdef NJSC32_AUTOPARAM 936 struct njsc32_autoparam *ap; 937 #endif 938 939 xs = cmd->c_xs; 940 #ifdef NJSC32_AUTOPARAM 941 ap = &sc->sc_cmdpg->dp_ap; 942 #else 943 /* reset CDB pointer */ 944 njsc32_write_2(sc, NJSC32_REG_COMMAND_CONTROL, NJSC32_CMD_CLEAR_CDB_FIFO_PTR); 945 #endif 946 947 /* CDB */ 948 TPRINTC(cmd, ("njsc32_cmd_load: CDB")); 949 for (i = 0; i < xs->cmdlen; i++) { 950 #ifdef NJSC32_AUTOPARAM 951 ap->ap_cdb[i].cdb_data = ((u_int8_t *)xs->cmd)[i]; 952 #else 953 njsc32_write_1(sc, NJSC32_REG_COMMAND_DATA, 954 ((u_int8_t *)xs->cmd)[i]); 955 #endif 956 TPRINTF((" %02x", ((u_int8_t *)cmd->c_xs->cmd)[i])); 957 } 958 #ifdef NJSC32_AUTOPARAM /* XXX needed? */ 959 for ( ; i < NJSC32_AUTOPARAM_CDBLEN; i++) 960 ap->ap_cdb[i].cdb_data = 0; 961 #endif 962 963 control = xs->xs_control; 964 965 /* 966 * Message Out 967 */ 968 njsc32_init_msgout(sc); 969 970 /* Identify */ 971 lun = xs->xs_periph->periph_lun; 972 njsc32_add_msgout(sc, (control & XS_CTL_REQSENSE) ? 973 MSG_IDENTIFY(lun, 0) : MSG_IDENTIFY(lun, 1)); 974 975 /* tagged queueing */ 976 if (control & XS_CTL_TAGMASK) { 977 njsc32_add_msgout(sc, xs->xs_tag_type); 978 njsc32_add_msgout(sc, xs->xs_tag_id); 979 TPRINTF((" (tag %#x %#x)\n", xs->xs_tag_type, xs->xs_tag_id)); 980 } 981 TPRINTF(("\n")); 982 983 target = cmd->c_target; 984 985 /* transfer negotiation */ 986 if (control & XS_CTL_REQSENSE) 987 target->t_state = NJSC32_TARST_INIT; 988 njsc32_negotiate_xfer(sc, target); 989 990 msgoutreg = njsc32_get_auto_msgout(sc); 991 992 #ifdef NJSC32_AUTOPARAM 993 ap->ap_msgout = htole32(msgoutreg); 994 995 ap->ap_sync = target->t_sync; 996 ap->ap_ackwidth = target->t_ackwidth; 997 ap->ap_targetid = target->t_targetid; 998 ap->ap_sample = target->t_sample; 999 1000 ap->ap_cmdctl = htole16(NJSC32_CMD_CLEAR_CDB_FIFO_PTR | 1001 NJSC32_CMD_AUTO_COMMAND_PHASE | 1002 NJSC32_CMD_AUTO_SCSI_START | NJSC32_CMD_AUTO_ATN | 1003 NJSC32_CMD_AUTO_MSGIN_00_04 | NJSC32_CMD_AUTO_MSGIN_02); 1004 #ifdef NJSC32_DUALEDGE 1005 ap->ap_xferctl = htole16(cmd->c_xferctl | target->t_xferctl); 1006 #else 1007 ap->ap_xferctl = htole16(cmd->c_xferctl); 1008 #endif 1009 ap->ap_sgtdmaaddr = htole32(cmd->c_sgtdmaaddr); 1010 1011 /* sync njsc32_autoparam */ 1012 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_cmdpg, 1013 offsetof(struct njsc32_dma_page, dp_ap), /* offset */ 1014 sizeof(struct njsc32_autoparam), 1015 BUS_DMASYNC_PREWRITE); 1016 1017 /* autoparam DMA address */ 1018 njsc32_write_4(sc, NJSC32_REG_SGT_ADR, sc->sc_ap_dma); 1019 1020 /* start command (autoparam) */ 1021 njsc32_write_2(sc, NJSC32_REG_COMMAND_CONTROL, 1022 NJSC32_CMD_CLEAR_CDB_FIFO_PTR | NJSC32_CMD_AUTO_PARAMETER); 1023 1024 #else /* not NJSC32_AUTOPARAM */ 1025 1026 njsc32_write_4(sc, NJSC32_REG_SCSI_MSG_OUT, msgoutreg); 1027 1028 /* load parameters */ 1029 njsc32_write_1(sc, NJSC32_REG_TARGET_ID, target->t_targetid); 1030 njsc32_write_1(sc, NJSC32_REG_SYNC, target->t_sync); 1031 njsc32_write_1(sc, NJSC32_REG_ACK_WIDTH, target->t_ackwidth); 1032 njsc32_write_1(sc, NJSC32_REG_SREQ_SAMPLING, target->t_sample); 1033 njsc32_write_4(sc, NJSC32_REG_SGT_ADR, cmd->c_sgtdmaaddr); 1034 #ifdef NJSC32_DUALEDGE 1035 njsc32_write_2(sc, NJSC32_REG_TRANSFER, 1036 cmd->c_xferctl | target->t_xferctl); 1037 #else 1038 njsc32_write_2(sc, NJSC32_REG_TRANSFER, cmd->c_xferctl); 1039 #endif 1040 /* start AutoSCSI */ 1041 njsc32_write_2(sc, NJSC32_REG_COMMAND_CONTROL, 1042 NJSC32_CMD_CLEAR_CDB_FIFO_PTR | NJSC32_CMD_AUTO_COMMAND_PHASE | 1043 NJSC32_CMD_AUTO_SCSI_START | NJSC32_CMD_AUTO_ATN | 1044 NJSC32_CMD_AUTO_MSGIN_00_04 | NJSC32_CMD_AUTO_MSGIN_02); 1045 #endif /* not NJSC32_AUTOPARAM */ 1046 } 1047 1048 /* Note: must be called at splbio() */ 1049 static void 1050 njsc32_start(struct njsc32_softc *sc) 1051 { 1052 struct njsc32_cmd *cmd; 1053 1054 /* get a command to issue */ 1055 TAILQ_FOREACH(cmd, &sc->sc_reqcmd, c_q) { 1056 if (cmd->c_lu->lu_cmd == NULL && 1057 ((cmd->c_flags & NJSC32_CMD_TAGGED) || 1058 TAILQ_EMPTY(&cmd->c_lu->lu_q))) 1059 break; /* OK, the logical unit is free */ 1060 } 1061 if (!cmd) 1062 goto out; /* no work to do */ 1063 1064 /* request will always fail if not in bus free phase */ 1065 if (njsc32_read_1(sc, NJSC32_REG_SCSI_BUS_MONITOR) != 1066 NJSC32_BUSMON_BUSFREE) 1067 goto busy; 1068 1069 /* clear parity error and enable parity detection */ 1070 njsc32_write_1(sc, NJSC32_REG_PARITY_CONTROL, 1071 NJSC32_PARITYCTL_CHECK_ENABLE | NJSC32_PARITYCTL_CLEAR_ERROR); 1072 1073 njsc32_cmd_load(sc, cmd); 1074 1075 if (sc->sc_nusedcmds++ == 0) 1076 njsc32_led_on(sc); 1077 1078 sc->sc_curcmd = cmd; 1079 sc->sc_stat = NJSC32_STAT_ARBIT; 1080 1081 if ((cmd->c_xs->xs_control & XS_CTL_POLL) == 0) { 1082 callout_reset(&cmd->c_xs->xs_callout, 1083 mstohz(cmd->c_xs->timeout), 1084 njsc32_cmdtimeout, cmd); 1085 } 1086 1087 return; 1088 1089 busy: /* XXX retry counter */ 1090 TPRINTF(("%s: njsc32_start: busy\n", sc->sc_dev.dv_xname)); 1091 njsc32_write_2(sc, NJSC32_REG_TIMER, NJSC32_ARBITRATION_RETRY_TIME); 1092 out: njsc32_write_2(sc, NJSC32_REG_TRANSFER, 0); 1093 } 1094 1095 static void 1096 njsc32_run_xfer(struct njsc32_softc *sc, struct scsipi_xfer *xs) 1097 { 1098 struct scsipi_periph *periph; 1099 int control; 1100 int lun; 1101 struct njsc32_cmd *cmd; 1102 int s, i, error; 1103 1104 periph = xs->xs_periph; 1105 KASSERT((unsigned)periph->periph_target <= NJSC32_MAX_TARGET_ID); 1106 1107 control = xs->xs_control; 1108 lun = periph->periph_lun; 1109 1110 /* 1111 * get a free cmd 1112 * (scsipi layer knows the number of cmds, so this shall never fail) 1113 */ 1114 s = splbio(); 1115 cmd = TAILQ_FIRST(&sc->sc_freecmd); 1116 KASSERT(cmd); 1117 TAILQ_REMOVE(&sc->sc_freecmd, cmd, c_q); 1118 splx(s); 1119 1120 /* 1121 * build a request 1122 */ 1123 njsc32_cmd_init(cmd); 1124 cmd->c_xs = xs; 1125 cmd->c_target = &sc->sc_targets[periph->periph_target]; 1126 cmd->c_lu = &cmd->c_target->t_lus[lun]; 1127 1128 /* tagged queueing */ 1129 if (control & XS_CTL_TAGMASK) { 1130 cmd->c_flags |= NJSC32_CMD_TAGGED; 1131 if (control & XS_CTL_HEAD_TAG) 1132 cmd->c_flags |= NJSC32_CMD_TAGGED_HEAD; 1133 } 1134 1135 /* map DMA buffer */ 1136 cmd->c_datacnt = xs->datalen; 1137 if (xs->datalen) { 1138 /* Is XS_CTL_DATA_UIO ever used anywhere? */ 1139 KASSERT((control & XS_CTL_DATA_UIO) == 0); 1140 1141 error = bus_dmamap_load(sc->sc_dmat, cmd->c_dmamap_xfer, 1142 xs->data, xs->datalen, NULL, 1143 ((control & XS_CTL_NOSLEEP) ? 1144 BUS_DMA_NOWAIT : BUS_DMA_WAITOK) | 1145 BUS_DMA_STREAMING | 1146 ((control & XS_CTL_DATA_IN) ? 1147 BUS_DMA_READ : BUS_DMA_WRITE)); 1148 1149 switch (error) { 1150 case 0: 1151 break; 1152 case ENOMEM: 1153 case EAGAIN: 1154 xs->error = XS_RESOURCE_SHORTAGE; 1155 goto map_failed; 1156 default: 1157 xs->error = XS_DRIVER_STUFFUP; 1158 map_failed: 1159 printf("%s: njsc32_run_xfer: map failed, error %d\n", 1160 sc->sc_dev.dv_xname, error); 1161 /* put it back to free command list */ 1162 s = splbio(); 1163 TAILQ_INSERT_HEAD(&sc->sc_freecmd, cmd, c_q); 1164 splx(s); 1165 /* abort this transfer */ 1166 scsipi_done(xs); 1167 return; 1168 } 1169 1170 bus_dmamap_sync(sc->sc_dmat, cmd->c_dmamap_xfer, 1171 0, cmd->c_dmamap_xfer->dm_mapsize, 1172 (control & XS_CTL_DATA_IN) ? 1173 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 1174 1175 for (i = 0; i < cmd->c_dmamap_xfer->dm_nsegs; i++) { 1176 cmd->c_sgt[i].sg_addr = 1177 htole32(cmd->c_dmamap_xfer->dm_segs[i].ds_addr); 1178 cmd->c_sgt[i].sg_len = 1179 htole32(cmd->c_dmamap_xfer->dm_segs[i].ds_len); 1180 } 1181 /* end mark */ 1182 cmd->c_sgt[i - 1].sg_len |= htole32(NJSC32_SGT_ENDMARK); 1183 1184 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_cmdpg, 1185 (char *)cmd->c_sgt - (char *)sc->sc_cmdpg, /* offset */ 1186 NJSC32_SIZE_SGT, 1187 BUS_DMASYNC_PREWRITE); 1188 1189 cmd->c_flags |= NJSC32_CMD_DMA_MAPPED; 1190 1191 /* enable transfer */ 1192 cmd->c_xferctl = 1193 NJSC32_XFR_TRANSFER_GO | NJSC32_XFR_BM_START | 1194 NJSC32_XFR_ALL_COUNT_CLR; 1195 1196 /* XXX How can we specify the DMA direction? */ 1197 1198 #if 0 /* faster write mode? (doesn't work) */ 1199 if ((control & XS_CTL_DATA_IN) == 0) 1200 cmd->c_xferctl |= NJSC32_XFR_ADVANCED_BM_WRITE; 1201 #endif 1202 } else { 1203 /* no data transfer */ 1204 cmd->c_xferctl = 0; 1205 } 1206 1207 /* queue request */ 1208 s = splbio(); 1209 TAILQ_INSERT_TAIL(&sc->sc_reqcmd, cmd, c_q); 1210 1211 /* start the controller if idle */ 1212 if (sc->sc_stat == NJSC32_STAT_IDLE) 1213 njsc32_start(sc); 1214 1215 splx(s); 1216 1217 if (control & XS_CTL_POLL) { 1218 /* wait for completion */ 1219 /* XXX should handle timeout? */ 1220 while ((xs->xs_status & XS_STS_DONE) == 0) { 1221 delay(1000); 1222 njsc32_intr(sc); 1223 } 1224 } 1225 } 1226 1227 static void 1228 njsc32_end_cmd(struct njsc32_softc *sc, struct njsc32_cmd *cmd, 1229 scsipi_xfer_result_t result) 1230 { 1231 struct scsipi_xfer *xs; 1232 int s; 1233 #ifdef DIAGNOSTIC 1234 struct njsc32_cmd *c; 1235 #endif 1236 1237 KASSERT(cmd); 1238 1239 #ifdef DIAGNOSTIC 1240 s = splbio(); 1241 TAILQ_FOREACH(c, &sc->sc_freecmd, c_q) { 1242 if (cmd == c) 1243 panic("njsc32_end_cmd: already in free list"); 1244 } 1245 splx(s); 1246 #endif 1247 xs = cmd->c_xs; 1248 1249 if (cmd->c_flags & NJSC32_CMD_DMA_MAPPED) { 1250 if (cmd->c_datacnt) { 1251 bus_dmamap_sync(sc->sc_dmat, cmd->c_dmamap_xfer, 1252 0, cmd->c_dmamap_xfer->dm_mapsize, 1253 (xs->xs_control & XS_CTL_DATA_IN) ? 1254 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 1255 1256 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_cmdpg, 1257 (char *)cmd->c_sgt - (char *)sc->sc_cmdpg, 1258 NJSC32_SIZE_SGT, BUS_DMASYNC_POSTWRITE); 1259 } 1260 1261 bus_dmamap_unload(sc->sc_dmat, cmd->c_dmamap_xfer); 1262 cmd->c_flags &= ~NJSC32_CMD_DMA_MAPPED; 1263 } 1264 1265 s = splbio(); 1266 if ((xs->xs_control & XS_CTL_POLL) == 0) 1267 callout_stop(&xs->xs_callout); 1268 1269 TAILQ_INSERT_HEAD(&sc->sc_freecmd, cmd, c_q); 1270 splx(s); 1271 1272 xs->error = result; 1273 scsipi_done(xs); 1274 1275 if (--sc->sc_nusedcmds == 0) 1276 njsc32_led_off(sc); 1277 } 1278 1279 /* 1280 * request from scsipi layer 1281 */ 1282 static void 1283 njsc32_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 1284 void *arg) 1285 { 1286 struct njsc32_softc *sc; 1287 struct scsipi_xfer_mode *xm; 1288 struct njsc32_target *target; 1289 1290 sc = (void *)chan->chan_adapter->adapt_dev; 1291 1292 switch (req) { 1293 case ADAPTER_REQ_RUN_XFER: 1294 njsc32_run_xfer(sc, arg); 1295 break; 1296 1297 case ADAPTER_REQ_GROW_RESOURCES: 1298 /* not supported */ 1299 break; 1300 1301 case ADAPTER_REQ_SET_XFER_MODE: 1302 xm = arg; 1303 target = &sc->sc_targets[xm->xm_target]; 1304 1305 target->t_flags = 0; 1306 if (xm->xm_mode & PERIPH_CAP_TQING) 1307 target->t_flags |= NJSC32_TARF_TAG; 1308 if (xm->xm_mode & PERIPH_CAP_SYNC) { 1309 target->t_flags |= NJSC32_TARF_SYNC; 1310 #ifdef NJSC32_DUALEDGE 1311 if (sc->sc_model & NJSC32_FLAG_DUALEDGE) 1312 target->t_flags |= NJSC32_TARF_DE; 1313 #endif 1314 } 1315 #ifdef NJSC32_DUALEDGE 1316 target->t_xferctl = 0; 1317 #endif 1318 target->t_state = NJSC32_TARST_INIT; 1319 njsc32_target_async(sc, target); 1320 1321 break; 1322 default: 1323 break; 1324 } 1325 } 1326 1327 static void 1328 njsc32_scsipi_minphys(struct buf *bp) 1329 { 1330 1331 if (bp->b_bcount > NJSC32_MAX_XFER) 1332 bp->b_bcount = NJSC32_MAX_XFER; 1333 minphys(bp); 1334 } 1335 1336 static void 1337 njsc32_reset_bus(struct njsc32_softc *sc) 1338 { 1339 int s; 1340 1341 DPRINTF(("%s: njsc32_reset_bus:\n", sc->sc_dev.dv_xname)); 1342 1343 /* SCSI bus reset */ 1344 njsc32_write_1(sc, NJSC32_REG_SCSI_BUS_CONTROL, NJSC32_SBCTL_RST); 1345 delay(NJSC32_RESET_HOLD_TIME); 1346 njsc32_write_1(sc, NJSC32_REG_SCSI_BUS_CONTROL, 0); 1347 1348 /* clear transfer */ 1349 s = splbio(); 1350 njsc32_reset_detected(sc); 1351 splx(s); 1352 } 1353 1354 /* 1355 * clear running/disconnected commands 1356 */ 1357 static void 1358 njsc32_clear_cmds(struct njsc32_softc *sc, scsipi_xfer_result_t cmdresult) 1359 { 1360 struct njsc32_cmd *cmd; 1361 int id, lun; 1362 struct njsc32_lu *lu; 1363 1364 njsc32_arbitration_failed(sc); 1365 1366 /* clear current transfer */ 1367 if ((cmd = sc->sc_curcmd) != NULL) { 1368 sc->sc_curcmd = NULL; 1369 njsc32_end_cmd(sc, cmd, cmdresult); 1370 } 1371 1372 /* clear disconnected transfers */ 1373 for (id = 0; id <= NJSC32_MAX_TARGET_ID; id++) { 1374 for (lun = 0; lun < NJSC32_NLU; lun++) { 1375 lu = &sc->sc_targets[id].t_lus[lun]; 1376 1377 if ((cmd = lu->lu_cmd) != NULL) { 1378 lu->lu_cmd = NULL; 1379 njsc32_end_cmd(sc, cmd, cmdresult); 1380 } 1381 while ((cmd = TAILQ_FIRST(&lu->lu_q)) != NULL) { 1382 TAILQ_REMOVE(&lu->lu_q, cmd, c_q); 1383 njsc32_end_cmd(sc, cmd, cmdresult); 1384 } 1385 } 1386 } 1387 } 1388 1389 static void 1390 njsc32_reset_detected(struct njsc32_softc *sc) 1391 { 1392 1393 njsc32_clear_cmds(sc, XS_RESET); 1394 njsc32_init_targets(sc); 1395 sc->sc_stat = NJSC32_STAT_IDLE; 1396 KASSERT(sc->sc_nusedcmds == 0); 1397 scsipi_async_event(&sc->sc_channel, ASYNC_EVENT_RESET, NULL); 1398 } 1399 1400 static int 1401 njsc32_scsipi_ioctl(struct scsipi_channel *chan, u_long cmd, caddr_t addr, 1402 int flag, struct proc *p) 1403 { 1404 struct njsc32_softc *sc = (void *)chan->chan_adapter->adapt_dev; 1405 1406 switch (cmd) { 1407 case SCBUSIORESET: 1408 njsc32_init(sc, 0); 1409 return 0; 1410 default: 1411 break; 1412 } 1413 1414 return ENOTTY; 1415 } 1416 1417 /* 1418 * set current data pointer 1419 */ 1420 static __inline void 1421 njsc32_set_cur_ptr(struct njsc32_cmd *cmd, u_int32_t pos) 1422 { 1423 1424 /* new current data pointer */ 1425 cmd->c_dp_cur = pos; 1426 1427 /* update number of bytes transferred */ 1428 if (pos > cmd->c_dp_max) 1429 cmd->c_dp_max = pos; 1430 } 1431 1432 /* 1433 * set data pointer for the next transfer 1434 */ 1435 static void 1436 njsc32_set_ptr(struct njsc32_softc *sc, struct njsc32_cmd *cmd, u_int32_t pos) 1437 { 1438 struct njsc32_sgtable *sg; 1439 unsigned sgte; 1440 u_int32_t len; 1441 1442 /* set current pointer */ 1443 njsc32_set_cur_ptr(cmd, pos); 1444 1445 /* undo previous fix if any */ 1446 if (cmd->c_sgfixcnt != 0) { 1447 sg = &cmd->c_sgt[cmd->c_sgoffset]; 1448 sg->sg_addr = htole32(le32toh(sg->sg_addr) - cmd->c_sgfixcnt); 1449 sg->sg_len = htole32(le32toh(sg->sg_len) + cmd->c_sgfixcnt); 1450 cmd->c_sgfixcnt = 0; 1451 } 1452 1453 if (pos >= cmd->c_datacnt) { 1454 /* transfer done */ 1455 #if 1 /*def DIAGNOSTIC*/ 1456 if (pos > cmd->c_datacnt) 1457 printf("%s: pos %u too large\n", 1458 sc->sc_dev.dv_xname, pos - cmd->c_datacnt); 1459 #endif 1460 cmd->c_xferctl = 0; /* XXX correct? */ 1461 1462 return; 1463 } 1464 1465 for (sgte = 0, sg = cmd->c_sgt; 1466 sgte < NJSC32_NUM_SG && pos > 0; sgte++, sg++) { 1467 len = le32toh(sg->sg_len) & ~NJSC32_SGT_ENDMARK; 1468 if (pos < len) { 1469 sg->sg_addr = htole32(le32toh(sg->sg_addr) + pos); 1470 sg->sg_len = htole32(le32toh(sg->sg_len) - pos); 1471 cmd->c_sgfixcnt = pos; 1472 break; 1473 } 1474 pos -= len; 1475 #ifdef DIAGNOSTIC 1476 if (sg->sg_len & htole32(NJSC32_SGT_ENDMARK)) { 1477 panic("njsc32_set_ptr: bad pos"); 1478 } 1479 #endif 1480 } 1481 #ifdef DIAGNOSTIC 1482 if (sgte >= NJSC32_NUM_SG) 1483 panic("njsc32_set_ptr: bad sg"); 1484 #endif 1485 if (cmd->c_sgoffset != sgte) { 1486 cmd->c_sgoffset = sgte; 1487 cmd->c_sgtdmaaddr = NJSC32_CMD_DMAADDR_SGT(cmd, sgte); 1488 } 1489 1490 /* XXX overkill */ 1491 bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap_cmdpg, 1492 (char *)cmd->c_sgt - (char *)sc->sc_cmdpg, /* offset */ 1493 NJSC32_SIZE_SGT, 1494 BUS_DMASYNC_PREWRITE); 1495 } 1496 1497 /* 1498 * save data pointer 1499 */ 1500 static __inline void 1501 njsc32_save_ptr(struct njsc32_cmd *cmd) 1502 { 1503 1504 cmd->c_dp_saved = cmd->c_dp_cur; 1505 } 1506 1507 static void 1508 njsc32_assert_ack(struct njsc32_softc *sc) 1509 { 1510 u_int8_t reg; 1511 1512 reg = njsc32_read_1(sc, NJSC32_REG_SCSI_BUS_CONTROL); 1513 reg |= NJSC32_SBCTL_ACK | NJSC32_SBCTL_ACK_ENABLE; 1514 #if 0 /* needed? */ 1515 reg |= NJSC32_SBCTL_AUTODIRECTION; 1516 #endif 1517 njsc32_write_1(sc, NJSC32_REG_SCSI_BUS_CONTROL, reg); 1518 } 1519 1520 static void 1521 njsc32_negate_ack(struct njsc32_softc *sc) 1522 { 1523 u_int8_t reg; 1524 1525 reg = njsc32_read_1(sc, NJSC32_REG_SCSI_BUS_CONTROL); 1526 #if 0 /* needed? */ 1527 reg |= NJSC32_SBCTL_ACK_ENABLE; 1528 reg |= NJSC32_SBCTL_AUTODIRECTION; 1529 #endif 1530 reg &= ~NJSC32_SBCTL_ACK; 1531 njsc32_write_1(sc, NJSC32_REG_SCSI_BUS_CONTROL, reg); 1532 } 1533 1534 static void 1535 njsc32_wait_req_negate(struct njsc32_softc *sc) 1536 { 1537 int cnt; 1538 1539 for (cnt = 0; cnt < NJSC32_REQ_TIMEOUT; cnt++) { 1540 if ((njsc32_read_1(sc, NJSC32_REG_SCSI_BUS_MONITOR) & 1541 NJSC32_BUSMON_REQ) == 0) 1542 return; 1543 delay(1); 1544 } 1545 printf("%s: njsc32_wait_req_negate: timed out\n", sc->sc_dev.dv_xname); 1546 } 1547 1548 static void 1549 njsc32_reconnect(struct njsc32_softc *sc, struct njsc32_cmd *cmd) 1550 { 1551 struct scsipi_xfer *xs; 1552 1553 xs = cmd->c_xs; 1554 if ((xs->xs_control & XS_CTL_POLL) == 0) { 1555 callout_stop(&xs->xs_callout); 1556 callout_reset(&xs->xs_callout, 1557 mstohz(xs->timeout), 1558 njsc32_cmdtimeout, cmd); 1559 } 1560 1561 /* Reconnection implies Restore Pointers */ 1562 njsc32_set_ptr(sc, cmd, cmd->c_dp_saved); 1563 } 1564 1565 static enum njsc32_reselstat 1566 njsc32_resel_identify(struct njsc32_softc *sc, int lun, 1567 struct njsc32_cmd **pcmd) 1568 { 1569 int targetid; 1570 struct njsc32_lu *plu; 1571 struct njsc32_cmd *cmd; 1572 1573 switch (sc->sc_stat) { 1574 case NJSC32_STAT_RESEL: 1575 break; /* OK */ 1576 1577 case NJSC32_STAT_RESEL_LUN: 1578 case NJSC32_STAT_RECONNECT: 1579 /* 1580 * accept and ignore if the LUN is the same as the current one, 1581 * reject otherwise. 1582 */ 1583 return sc->sc_resellun == lun ? 1584 NJSC32_RESEL_THROUGH : NJSC32_RESEL_ERROR; 1585 1586 default: 1587 printf("%s: njsc32_resel_identify: not in reselection\n", 1588 sc->sc_dev.dv_xname); 1589 return NJSC32_RESEL_ERROR; 1590 } 1591 1592 targetid = sc->sc_reselid; 1593 TPRINTF(("%s: njsc32_resel_identify: reselection lun %d\n", 1594 sc->sc_dev.dv_xname, lun)); 1595 1596 if (targetid > NJSC32_MAX_TARGET_ID || lun >= NJSC32_NLU) 1597 return NJSC32_RESEL_ERROR; 1598 1599 sc->sc_resellun = lun; 1600 plu = &sc->sc_targets[targetid].t_lus[lun]; 1601 1602 if ((cmd = plu->lu_cmd) != NULL) { 1603 sc->sc_stat = NJSC32_STAT_RECONNECT; 1604 plu->lu_cmd = NULL; 1605 *pcmd = cmd; 1606 TPRINTC(cmd, ("njsc32_resel_identify: I_T_L nexus\n")); 1607 njsc32_reconnect(sc, cmd); 1608 return NJSC32_RESEL_COMPLETE; 1609 } else if (!TAILQ_EMPTY(&plu->lu_q)) { 1610 /* wait for tag */ 1611 sc->sc_stat = NJSC32_STAT_RESEL_LUN; 1612 return NJSC32_RESEL_THROUGH; 1613 } 1614 1615 /* no disconnected commands */ 1616 return NJSC32_RESEL_ERROR; 1617 } 1618 1619 static enum njsc32_reselstat 1620 njsc32_resel_tag(struct njsc32_softc *sc, int tag, struct njsc32_cmd **pcmd) 1621 { 1622 struct njsc32_cmd_head *head; 1623 struct njsc32_cmd *cmd; 1624 1625 TPRINTF(("%s: njsc32_resel_tag: reselection tag %d\n", 1626 sc->sc_dev.dv_xname, tag)); 1627 if (sc->sc_stat != NJSC32_STAT_RESEL_LUN) 1628 return NJSC32_RESEL_ERROR; 1629 1630 head = &sc->sc_targets[sc->sc_reselid].t_lus[sc->sc_resellun].lu_q; 1631 1632 /* XXX slow? */ 1633 /* search for the command of the tag */ 1634 TAILQ_FOREACH(cmd, head, c_q) { 1635 if (cmd->c_xs->xs_tag_id == tag) { 1636 sc->sc_stat = NJSC32_STAT_RECONNECT; 1637 TAILQ_REMOVE(head, cmd, c_q); 1638 *pcmd = cmd; 1639 TPRINTC(cmd, ("njsc32_resel_tag: I_T_L_Q nexus\n")); 1640 njsc32_reconnect(sc, cmd); 1641 return NJSC32_RESEL_COMPLETE; 1642 } 1643 } 1644 1645 /* no disconnected commands */ 1646 return NJSC32_RESEL_ERROR; 1647 } 1648 1649 /* 1650 * Reload parameters and restart AutoSCSI. 1651 * 1652 * XXX autoparam doesn't work as expected and we can't use it here. 1653 */ 1654 static void 1655 njsc32_cmd_reload(struct njsc32_softc *sc, struct njsc32_cmd *cmd, int cctl) 1656 { 1657 struct njsc32_target *target; 1658 1659 target = cmd->c_target; 1660 1661 /* clear parity error and enable parity detection */ 1662 njsc32_write_1(sc, NJSC32_REG_PARITY_CONTROL, 1663 NJSC32_PARITYCTL_CHECK_ENABLE | NJSC32_PARITYCTL_CLEAR_ERROR); 1664 1665 /* load parameters */ 1666 njsc32_write_1(sc, NJSC32_REG_SYNC, target->t_sync); 1667 njsc32_write_1(sc, NJSC32_REG_ACK_WIDTH, target->t_ackwidth); 1668 njsc32_write_1(sc, NJSC32_REG_SREQ_SAMPLING, target->t_sample); 1669 njsc32_write_4(sc, NJSC32_REG_SGT_ADR, cmd->c_sgtdmaaddr); 1670 #ifdef NJSC32_DUALEDGE 1671 njsc32_write_2(sc, NJSC32_REG_TRANSFER, 1672 cmd->c_xferctl | target->t_xferctl); 1673 #else 1674 njsc32_write_2(sc, NJSC32_REG_TRANSFER, cmd->c_xferctl); 1675 #endif 1676 /* start AutoSCSI */ 1677 njsc32_write_2(sc, NJSC32_REG_COMMAND_CONTROL, cctl); 1678 1679 sc->sc_curcmd = cmd; 1680 } 1681 1682 static void 1683 njsc32_update_xfer_mode(struct njsc32_softc *sc, struct njsc32_target *target) 1684 { 1685 struct scsipi_xfer_mode xm; 1686 1687 xm.xm_target = target - sc->sc_targets; /* target ID */ 1688 xm.xm_mode = 0; 1689 xm.xm_period = target->t_syncperiod; 1690 xm.xm_offset = target->t_syncoffset; 1691 if (xm.xm_offset != 0) 1692 xm.xm_mode |= PERIPH_CAP_SYNC; 1693 if (target->t_flags & NJSC32_TARF_TAG) 1694 xm.xm_mode |= PERIPH_CAP_TQING; 1695 1696 scsipi_async_event(&sc->sc_channel, ASYNC_EVENT_XFER_MODE, &xm); 1697 } 1698 1699 static void 1700 njsc32_msgin(struct njsc32_softc *sc) 1701 { 1702 u_int8_t msg0, msg; 1703 int msgcnt; 1704 struct njsc32_cmd *cmd; 1705 enum njsc32_reselstat rstat; 1706 int cctl = 0; 1707 u_int32_t ptr; /* unsigned type ensures 2-complement calculation */ 1708 u_int32_t msgout = 0; 1709 boolean_t reload_params = FALSE; 1710 struct njsc32_target *target; 1711 int idx, period, offset; 1712 1713 /* 1714 * we are in Message In, so the previous Message Out should have 1715 * been done. 1716 */ 1717 njsc32_init_msgout(sc); 1718 1719 /* get a byte of Message In */ 1720 msg = njsc32_read_1(sc, NJSC32_REG_DATA_IN); 1721 TPRINTF(("%s: njsc32_msgin: got %#x\n", sc->sc_dev.dv_xname, msg)); 1722 if ((msgcnt = sc->sc_msgincnt) < NJSC32_MSGIN_LEN) 1723 sc->sc_msginbuf[sc->sc_msgincnt] = msg; 1724 1725 njsc32_assert_ack(sc); 1726 1727 msg0 = sc->sc_msginbuf[0]; 1728 cmd = sc->sc_curcmd; 1729 1730 /* check for parity error */ 1731 if (njsc32_read_1(sc, NJSC32_REG_PARITY_STATUS) & 1732 NJSC32_PARITYSTATUS_ERROR_LSB) { 1733 1734 printf("%s: msgin: parity error\n", sc->sc_dev.dv_xname); 1735 1736 /* clear parity error */ 1737 njsc32_write_1(sc, NJSC32_REG_PARITY_CONTROL, 1738 NJSC32_PARITYCTL_CHECK_ENABLE | 1739 NJSC32_PARITYCTL_CLEAR_ERROR); 1740 1741 /* respond as Message Parity Error */ 1742 njsc32_add_msgout(sc, MSG_PARITY_ERROR); 1743 1744 /* clear Message In */ 1745 sc->sc_msgincnt = 0; 1746 goto reply; 1747 } 1748 1749 #define WAITNEXTMSG do { sc->sc_msgincnt++; goto restart; } while (0) 1750 #define MSGCOMPLETE do { sc->sc_msgincnt = 0; goto restart; } while (0) 1751 if (MSG_ISIDENTIFY(msg0)) { 1752 /* 1753 * Got Identify message from target. 1754 */ 1755 if ((msg0 & ~MSG_IDENTIFY_LUNMASK) != MSG_IDENTIFYFLAG || 1756 (rstat = njsc32_resel_identify(sc, msg0 & 1757 MSG_IDENTIFY_LUNMASK, &cmd)) == NJSC32_RESEL_ERROR) { 1758 /* 1759 * invalid Identify -> Reject 1760 */ 1761 goto reject; 1762 } 1763 if (rstat == NJSC32_RESEL_COMPLETE) 1764 reload_params = TRUE; 1765 MSGCOMPLETE; 1766 } 1767 1768 if (msg0 == MSG_SIMPLE_Q_TAG) { 1769 if (msgcnt == 0) 1770 WAITNEXTMSG; 1771 1772 /* got whole message */ 1773 sc->sc_msgincnt = 0; 1774 1775 if ((rstat = njsc32_resel_tag(sc, sc->sc_msginbuf[1], &cmd)) 1776 == NJSC32_RESEL_ERROR) { 1777 /* 1778 * invalid Simple Queue Tag -> Abort Tag 1779 */ 1780 printf("%s: msgin: invalid tag\n", sc->sc_dev.dv_xname); 1781 njsc32_add_msgout(sc, MSG_ABORT_TAG); 1782 goto reply; 1783 } 1784 if (rstat == NJSC32_RESEL_COMPLETE) 1785 reload_params = TRUE; 1786 MSGCOMPLETE; 1787 } 1788 1789 /* I_T_L or I_T_L_Q nexus should be established now */ 1790 if (cmd == NULL) { 1791 printf("%s: msgin %#x without nexus -- sending abort\n", 1792 sc->sc_dev.dv_xname, msg0); 1793 njsc32_add_msgout(sc, MSG_ABORT); 1794 goto reply; 1795 } 1796 1797 /* 1798 * extended message 1799 * 0x01 <length (0 stands for 256)> <length bytes> 1800 * (<code> [<parameter> ...]) 1801 */ 1802 #define EXTLENOFF 1 1803 #define EXTCODEOFF 2 1804 if (msg0 == MSG_EXTENDED) { 1805 if (msgcnt < EXTLENOFF || 1806 msgcnt < EXTLENOFF + 1 + 1807 (u_int8_t)(sc->sc_msginbuf[EXTLENOFF] - 1)) 1808 WAITNEXTMSG; 1809 1810 /* got whole message */ 1811 sc->sc_msgincnt = 0; 1812 1813 switch (sc->sc_msginbuf[EXTCODEOFF]) { 1814 case 0: /* Modify Data Pointer */ 1815 if (msgcnt != 5 + EXTCODEOFF - 1) 1816 break; 1817 /* 1818 * parameter is 32bit big-endian signed (2-complement) 1819 * value 1820 */ 1821 ptr = (sc->sc_msginbuf[EXTCODEOFF + 1] << 24) | 1822 (sc->sc_msginbuf[EXTCODEOFF + 2] << 16) | 1823 (sc->sc_msginbuf[EXTCODEOFF + 3] << 8) | 1824 sc->sc_msginbuf[EXTCODEOFF + 4]; 1825 1826 /* new pointer */ 1827 ptr += cmd->c_dp_cur; /* ignore overflow */ 1828 1829 /* reject if ptr is not in data buffer */ 1830 if (ptr > cmd->c_datacnt) 1831 break; 1832 1833 njsc32_set_ptr(sc, cmd, ptr); 1834 goto restart; 1835 1836 case MSG_EXT_SDTR: /* Synchronous Data Transfer Request */ 1837 DPRINTC(cmd, ("SDTR %#x %#x\n", 1838 sc->sc_msginbuf[EXTCODEOFF + 1], 1839 sc->sc_msginbuf[EXTCODEOFF + 2])); 1840 if (msgcnt != MSG_EXT_SDTR_LEN + EXTCODEOFF-1) 1841 break; /* reject */ 1842 1843 target = cmd->c_target; 1844 1845 /* lookup sync period parameters */ 1846 period = sc->sc_msginbuf[EXTCODEOFF + 1]; 1847 for (idx = sc->sc_sync_max; idx < NJSC32_NSYNCT; idx++) 1848 if (sc->sc_synct[idx].sp_period >= period) { 1849 period = sc->sc_synct[idx].sp_period; 1850 break; 1851 } 1852 if (idx >= NJSC32_NSYNCT) { 1853 /* 1854 * We can't meet the timing condition that 1855 * the target requests -- use async. 1856 */ 1857 njsc32_target_async(sc, target); 1858 njsc32_update_xfer_mode(sc, target); 1859 if (target->t_state == NJSC32_TARST_SDTR) { 1860 /* 1861 * We started SDTR exchange -- start 1862 * negotiation again and request async. 1863 */ 1864 target->t_state = NJSC32_TARST_ASYNC; 1865 njsc32_negotiate_xfer(sc, target); 1866 goto reply; 1867 } else { 1868 /* 1869 * The target started SDTR exchange 1870 * -- just reject and fallback 1871 * to async. 1872 */ 1873 goto reject; 1874 } 1875 } 1876 1877 /* check sync offset */ 1878 offset = sc->sc_msginbuf[EXTCODEOFF + 2]; 1879 if (offset > NJSC32_SYNCOFFSET_MAX) { 1880 if (target->t_state == NJSC32_TARST_SDTR) { 1881 printf("%s: wrong sync offset: %d\n", 1882 cmd->c_xs->xs_periph->periph_dev->dv_xname, 1883 offset); 1884 /* XXX what to do? */ 1885 } 1886 offset = NJSC32_SYNCOFFSET_MAX; 1887 } 1888 1889 target->t_ackwidth = sc->sc_synct[idx].sp_ackw; 1890 target->t_sample = sc->sc_synct[idx].sp_sample; 1891 target->t_syncperiod = period; 1892 target->t_syncoffset = offset; 1893 target->t_sync = NJSC32_SYNC_VAL(idx, offset); 1894 njsc32_update_xfer_mode(sc, target); 1895 1896 if (target->t_state == NJSC32_TARST_SDTR) { 1897 target->t_state = NJSC32_TARST_DONE; 1898 } else { 1899 njsc32_msgout_sdtr(sc, period, offset); 1900 goto reply; 1901 } 1902 goto restart; 1903 1904 case MSG_EXT_WDTR: /* Wide Data Transfer Request */ 1905 DPRINTC(cmd, 1906 ("WDTR %#x\n", sc->sc_msginbuf[EXTCODEOFF + 1])); 1907 #ifdef NJSC32_DUALEDGE 1908 if (msgcnt != MSG_EXT_WDTR_LEN + EXTCODEOFF-1) 1909 break; /* reject */ 1910 1911 /* 1912 * T->I of this message is not used for 1913 * DualEdge negotiation, so the device 1914 * must not be a DualEdge device. 1915 * 1916 * XXX correct? 1917 */ 1918 target = cmd->c_target; 1919 target->t_xferctl = 0; 1920 1921 switch (target->t_state) { 1922 case NJSC32_TARST_DE: 1923 if (sc->sc_msginbuf[EXTCODEOFF + 1] != 1924 MSG_EXT_WDTR_BUS_8_BIT) { 1925 /* 1926 * Oops, we got unexpected WDTR. 1927 * Negotiate for 8bit. 1928 */ 1929 target->t_state = NJSC32_TARST_WDTR; 1930 } else { 1931 target->t_state = NJSC32_TARST_SDTR; 1932 } 1933 njsc32_negotiate_xfer(sc, target); 1934 goto reply; 1935 1936 case NJSC32_TARST_WDTR: 1937 if (sc->sc_msginbuf[EXTCODEOFF + 1] != 1938 MSG_EXT_WDTR_BUS_8_BIT) { 1939 printf("%s: unexpected transfer width: %#x\n", 1940 cmd->c_xs->xs_periph->periph_dev->dv_xname, 1941 sc->sc_msginbuf[EXTCODEOFF + 1]); 1942 /* XXX what to do? */ 1943 } 1944 target->t_state = NJSC32_TARST_SDTR; 1945 njsc32_negotiate_xfer(sc, target); 1946 goto reply; 1947 1948 default: 1949 /* the target started WDTR exchange */ 1950 DPRINTC(cmd, ("WDTR from target\n")); 1951 1952 target->t_state = NJSC32_TARST_SDTR; 1953 njsc32_target_async(sc, target); 1954 1955 break; /* reject the WDTR (8bit transfer) */ 1956 } 1957 #endif /* NJSC32_DUALEDGE */ 1958 break; /* reject */ 1959 } 1960 DPRINTC(cmd, ("njsc32_msgin: reject ext msg %#x msgincnt %d\n", 1961 sc->sc_msginbuf[EXTCODEOFF], msgcnt)); 1962 goto reject; 1963 } 1964 1965 /* 2byte messages */ 1966 if (MSG_IS2BYTE(msg0)) { 1967 if (msgcnt == 0) 1968 WAITNEXTMSG; 1969 1970 /* got whole message */ 1971 sc->sc_msgincnt = 0; 1972 } 1973 1974 switch (msg0) { 1975 case MSG_CMDCOMPLETE: /* 0x00 */ 1976 case MSG_SAVEDATAPOINTER: /* 0x02 */ 1977 case MSG_DISCONNECT: /* 0x04 */ 1978 /* handled by AutoSCSI */ 1979 PRINTC(cmd, ("msgin: unexpected msg: %#x\n", msg0)); 1980 break; 1981 1982 case MSG_RESTOREPOINTERS: /* 0x03 */ 1983 /* restore data pointer to what was saved */ 1984 DPRINTC(cmd, ("njsc32_msgin: Restore Pointers\n")); 1985 njsc32_set_ptr(sc, cmd, cmd->c_dp_saved); 1986 reload_params = TRUE; 1987 MSGCOMPLETE; 1988 /* NOTREACHED */ 1989 break; 1990 1991 #if 0 /* handled above */ 1992 case MSG_EXTENDED: /* 0x01 */ 1993 #endif 1994 case MSG_MESSAGE_REJECT: /* 0x07 */ 1995 target = cmd->c_target; 1996 DPRINTC(cmd, ("Reject tarst %d\n", target->t_state)); 1997 switch (target->t_state) { 1998 #ifdef NJSC32_DUALEDGE 1999 case NJSC32_TARST_WDTR: 2000 case NJSC32_TARST_DE: 2001 target->t_xferctl = 0; 2002 target->t_state = NJSC32_TARST_SDTR; 2003 njsc32_negotiate_xfer(sc, target); 2004 goto reply; 2005 #endif 2006 case NJSC32_TARST_SDTR: 2007 case NJSC32_TARST_ASYNC: 2008 njsc32_target_async(sc, target); 2009 target->t_state = NJSC32_TARST_DONE; 2010 njsc32_update_xfer_mode(sc, target); 2011 break; 2012 default: 2013 break; 2014 } 2015 goto restart; 2016 2017 case MSG_NOOP: /* 0x08 */ 2018 #ifdef NJSC32_DUALEDGE 2019 target = cmd->c_target; 2020 if (target->t_state == NJSC32_TARST_DE) { 2021 aprint_normal("%s: DualEdge transfer\n", 2022 cmd->c_xs->xs_periph->periph_dev->dv_xname); 2023 target->t_xferctl = NJSC32_XFR_DUALEDGE_ENABLE; 2024 /* go to next negotiation */ 2025 target->t_state = NJSC32_TARST_SDTR; 2026 njsc32_negotiate_xfer(sc, target); 2027 goto reply; 2028 } 2029 #endif 2030 goto restart; 2031 2032 case MSG_INITIATOR_DET_ERR: /* 0x05 I->T only */ 2033 case MSG_ABORT: /* 0x06 I->T only */ 2034 case MSG_PARITY_ERROR: /* 0x09 I->T only */ 2035 case MSG_LINK_CMD_COMPLETE: /* 0x0a */ 2036 case MSG_LINK_CMD_COMPLETEF: /* 0x0b */ 2037 case MSG_BUS_DEV_RESET: /* 0x0c I->T only */ 2038 case MSG_ABORT_TAG: /* 0x0d I->T only */ 2039 case MSG_CLEAR_QUEUE: /* 0x0e I->T only */ 2040 2041 #if 0 /* handled above */ 2042 case MSG_SIMPLE_Q_TAG: /* 0x20 */ 2043 #endif 2044 case MSG_HEAD_OF_Q_TAG: /* 0x21 I->T only */ 2045 case MSG_ORDERED_Q_TAG: /* 0x22 I->T only */ 2046 case MSG_IGN_WIDE_RESIDUE: /* 0x23 */ 2047 2048 default: 2049 #ifdef NJSC32_DEBUG 2050 PRINTC(cmd, ("msgin: unsupported msg: %#x", msg0)); 2051 if (MSG_IS2BYTE(msg0)) 2052 printf(" %#x", msg); 2053 printf("\n"); 2054 #endif 2055 break; 2056 } 2057 2058 reject: 2059 njsc32_add_msgout(sc, MSG_MESSAGE_REJECT); 2060 2061 reply: 2062 msgout = njsc32_get_auto_msgout(sc); 2063 2064 restart: 2065 cctl = NJSC32_CMD_CLEAR_CDB_FIFO_PTR | 2066 NJSC32_CMD_AUTO_COMMAND_PHASE | 2067 NJSC32_CMD_AUTO_SCSI_RESTART; 2068 2069 /* 2070 * Be careful the second and latter bytes of Message In 2071 * shall not be absorbed by AutoSCSI. 2072 */ 2073 if (sc->sc_msgincnt == 0) 2074 cctl |= NJSC32_CMD_AUTO_MSGIN_00_04 | NJSC32_CMD_AUTO_MSGIN_02; 2075 2076 if (sc->sc_msgoutlen != 0) 2077 cctl |= NJSC32_CMD_AUTO_ATN; 2078 2079 njsc32_write_4(sc, NJSC32_REG_SCSI_MSG_OUT, msgout); 2080 2081 /* (re)start AutoSCSI (may assert ATN) */ 2082 if (reload_params) { 2083 njsc32_cmd_reload(sc, cmd, cctl); 2084 } else { 2085 njsc32_write_2(sc, NJSC32_REG_COMMAND_CONTROL, cctl); 2086 } 2087 2088 /* +ATN -> -REQ: need 90ns delay? */ 2089 2090 njsc32_wait_req_negate(sc); /* wait for REQ negation */ 2091 2092 njsc32_negate_ack(sc); 2093 2094 return; 2095 } 2096 2097 static void 2098 njsc32_msgout(struct njsc32_softc *sc) 2099 { 2100 int cctl; 2101 u_int8_t bus; 2102 unsigned n; 2103 2104 if (sc->sc_msgoutlen == 0) { 2105 /* target entered to Message Out on unexpected timing */ 2106 njsc32_add_msgout(sc, MSG_NOOP); 2107 } 2108 2109 cctl = NJSC32_CMD_CLEAR_CDB_FIFO_PTR | 2110 NJSC32_CMD_AUTO_COMMAND_PHASE | NJSC32_CMD_AUTO_SCSI_RESTART | 2111 NJSC32_CMD_AUTO_MSGIN_00_04 | NJSC32_CMD_AUTO_MSGIN_02; 2112 2113 /* make sure target is in Message Out phase */ 2114 bus = njsc32_read_1(sc, NJSC32_REG_SCSI_BUS_MONITOR); 2115 if ((bus & NJSC32_BUSMON_PHASE_MASK) != NJSC32_PHASE_MESSAGE_OUT) { 2116 /* 2117 * Message Out is aborted by target. 2118 */ 2119 printf("%s: njsc32_msgout: phase change %#x\n", 2120 sc->sc_dev.dv_xname, bus); 2121 2122 /* XXX what to do? */ 2123 2124 /* restart AutoSCSI (negate ATN) */ 2125 njsc32_write_2(sc, NJSC32_REG_COMMAND_CONTROL, cctl); 2126 2127 sc->sc_msgoutidx = 0; 2128 return; 2129 } 2130 2131 n = sc->sc_msgoutidx; 2132 if (n == sc->sc_msgoutlen - 1) { 2133 /* 2134 * negate ATN before sending ACK 2135 */ 2136 njsc32_write_2(sc, NJSC32_REG_COMMAND_CONTROL, 0); 2137 2138 sc->sc_msgoutidx = 0; /* target may retry Message Out */ 2139 } else { 2140 cctl |= NJSC32_CMD_AUTO_ATN; 2141 sc->sc_msgoutidx++; 2142 } 2143 2144 /* Send Message Out */ 2145 njsc32_write_1(sc, NJSC32_REG_SCSI_OUT_LATCH, sc->sc_msgout[n]); 2146 2147 /* DBn -> +ACK: need 55ns delay? */ 2148 2149 njsc32_assert_ack(sc); 2150 njsc32_wait_req_negate(sc); /* wait for REQ negation */ 2151 2152 /* restart AutoSCSI */ 2153 njsc32_write_2(sc, NJSC32_REG_COMMAND_CONTROL, cctl); 2154 2155 njsc32_negate_ack(sc); 2156 2157 /* 2158 * do not reset sc->sc_msgoutlen so the target 2159 * can retry Message Out phase 2160 */ 2161 } 2162 2163 static void 2164 njsc32_cmdtimeout(void *arg) 2165 { 2166 struct njsc32_cmd *cmd = arg; 2167 struct njsc32_softc *sc; 2168 int s; 2169 2170 PRINTC(cmd, ("command timeout\n")); 2171 2172 sc = cmd->c_sc; 2173 2174 s = splbio(); 2175 2176 if (sc->sc_stat == NJSC32_STAT_ARBIT) 2177 njsc32_arbitration_failed(sc); 2178 else { 2179 sc->sc_curcmd = NULL; 2180 sc->sc_stat = NJSC32_STAT_IDLE; 2181 njsc32_end_cmd(sc, cmd, XS_TIMEOUT); 2182 } 2183 2184 /* XXX? */ 2185 njsc32_init(sc, 1); /* bus reset */ 2186 2187 splx(s); 2188 } 2189 2190 static void 2191 njsc32_reseltimeout(void *arg) 2192 { 2193 struct njsc32_cmd *cmd = arg; 2194 struct njsc32_softc *sc; 2195 int s; 2196 2197 PRINTC(cmd, ("reselection timeout\n")); 2198 2199 sc = cmd->c_sc; 2200 2201 s = splbio(); 2202 2203 /* remove from disconnected list */ 2204 if (cmd->c_flags & NJSC32_CMD_TAGGED) { 2205 /* I_T_L_Q */ 2206 KASSERT(cmd->c_lu->lu_cmd == NULL); 2207 TAILQ_REMOVE(&cmd->c_lu->lu_q, cmd, c_q); 2208 } else { 2209 /* I_T_L */ 2210 KASSERT(cmd->c_lu->lu_cmd == cmd); 2211 cmd->c_lu->lu_cmd = NULL; 2212 } 2213 2214 njsc32_end_cmd(sc, cmd, XS_TIMEOUT); 2215 2216 /* XXX? */ 2217 njsc32_init(sc, 1); /* bus reset */ 2218 2219 splx(s); 2220 } 2221 2222 static __inline void 2223 njsc32_end_auto(struct njsc32_softc *sc, struct njsc32_cmd *cmd, int auto_phase) 2224 { 2225 struct scsipi_xfer *xs; 2226 2227 if (auto_phase & NJSC32_XPHASE_MSGIN_02) { 2228 /* Message In: 0x02 Save Data Pointer */ 2229 2230 /* 2231 * Adjust saved data pointer 2232 * if the command is not completed yet. 2233 */ 2234 if ((auto_phase & NJSC32_XPHASE_MSGIN_00) == 0 && 2235 (auto_phase & 2236 (NJSC32_XPHASE_DATA_IN | NJSC32_XPHASE_DATA_OUT)) != 0) { 2237 njsc32_save_ptr(cmd); 2238 } 2239 TPRINTF(("BM %u, SGT %u, SACK %u, SAVED_ACK %u\n", 2240 njsc32_read_4(sc, NJSC32_REG_BM_CNT), 2241 njsc32_read_4(sc, NJSC32_REG_SGT_ADR), 2242 njsc32_read_4(sc, NJSC32_REG_SACK_CNT), 2243 njsc32_read_4(sc, NJSC32_REG_SAVED_ACK_CNT))); 2244 } 2245 2246 xs = cmd->c_xs; 2247 2248 if (auto_phase & NJSC32_XPHASE_MSGIN_00) { 2249 /* Command Complete */ 2250 TPRINTC(cmd, ("njsc32_intr: Command Complete\n")); 2251 switch (xs->status) { 2252 case SCSI_CHECK: case SCSI_QUEUE_FULL: case SCSI_BUSY: 2253 /* 2254 * scsipi layer will automatically handle the error 2255 */ 2256 njsc32_end_cmd(sc, cmd, XS_BUSY); 2257 break; 2258 default: 2259 xs->resid -= cmd->c_dp_max; 2260 njsc32_end_cmd(sc, cmd, XS_NOERROR); 2261 break; 2262 } 2263 } else if (auto_phase & NJSC32_XPHASE_MSGIN_04) { 2264 /* Disconnect */ 2265 TPRINTC(cmd, ("njsc32_intr: Disconnect\n")); 2266 2267 /* for ill-designed devices */ 2268 if ((xs->xs_periph->periph_quirks & PQUIRK_AUTOSAVE) != 0) 2269 njsc32_save_ptr(cmd); 2270 2271 /* 2272 * move current cmd to disconnected list 2273 */ 2274 if (cmd->c_flags & NJSC32_CMD_TAGGED) { 2275 /* I_T_L_Q */ 2276 if (cmd->c_flags & NJSC32_CMD_TAGGED_HEAD) 2277 TAILQ_INSERT_HEAD(&cmd->c_lu->lu_q, cmd, c_q); 2278 else 2279 TAILQ_INSERT_TAIL(&cmd->c_lu->lu_q, cmd, c_q); 2280 } else { 2281 /* I_T_L */ 2282 cmd->c_lu->lu_cmd = cmd; 2283 } 2284 2285 /* 2286 * schedule timeout -- avoid being 2287 * disconnected forever 2288 */ 2289 if ((xs->xs_control & XS_CTL_POLL) == 0) { 2290 callout_stop(&xs->xs_callout); 2291 callout_reset(&xs->xs_callout, mstohz(xs->timeout), 2292 njsc32_reseltimeout, cmd); 2293 } 2294 2295 } else { 2296 /* 2297 * target has come to Bus Free phase 2298 * probably to notify an error 2299 */ 2300 PRINTC(cmd, ("njsc32_intr: unexpected bus free\n")); 2301 /* try Request Sense */ 2302 xs->status = SCSI_CHECK; 2303 njsc32_end_cmd(sc, cmd, XS_BUSY); 2304 } 2305 } 2306 2307 int 2308 njsc32_intr(void *arg) 2309 { 2310 struct njsc32_softc *sc = arg; 2311 u_int16_t intr; 2312 u_int8_t arbstat, bus_phase; 2313 int auto_phase; 2314 int idbit; 2315 struct njsc32_cmd *cmd; 2316 2317 intr = njsc32_read_2(sc, NJSC32_REG_IRQ); 2318 if ((intr & NJSC32_IRQ_INTR_PENDING) == 0) 2319 return 0; /* not mine */ 2320 2321 TPRINTF(("%s: njsc32_intr: %#x\n", sc->sc_dev.dv_xname, intr)); 2322 2323 #if 0 /* I don't think this is required */ 2324 /* mask interrupts */ 2325 njsc32_write_2(sc, NJSC32_REG_IRQ, NJSC32_IRQ_MASK_ALL); 2326 #endif 2327 2328 /* we got an interrupt, so stop the timer */ 2329 njsc32_write_2(sc, NJSC32_REG_TIMER, NJSC32_TIMER_STOP); 2330 2331 if (intr & NJSC32_IRQ_SCSIRESET) { 2332 printf("%s: detected bus reset\n", sc->sc_dev.dv_xname); 2333 /* clear current request */ 2334 njsc32_reset_detected(sc); 2335 goto out; 2336 } 2337 2338 if (sc->sc_stat == NJSC32_STAT_ARBIT) { 2339 cmd = sc->sc_curcmd; 2340 KASSERT(cmd); 2341 arbstat = njsc32_read_1(sc, NJSC32_REG_ARBITRATION_STAT); 2342 if (arbstat & (NJSC32_ARBSTAT_WIN | NJSC32_ARBSTAT_FAIL)) { 2343 /* 2344 * arbitration done 2345 */ 2346 /* clear arbitration status */ 2347 njsc32_write_1(sc, NJSC32_REG_SET_ARBITRATION, 2348 NJSC32_SETARB_CLEAR); 2349 2350 if (arbstat & NJSC32_ARBSTAT_WIN) { 2351 TPRINTC(cmd, 2352 ("njsc32_intr: arbitration won\n")); 2353 2354 TAILQ_REMOVE(&sc->sc_reqcmd, cmd, c_q); 2355 2356 sc->sc_stat = NJSC32_STAT_CONNECT; 2357 } else { 2358 TPRINTC(cmd, 2359 ("njsc32_intr: arbitration failed\n")); 2360 2361 njsc32_arbitration_failed(sc); 2362 2363 /* XXX delay */ 2364 /* XXX retry counter */ 2365 } 2366 } 2367 } 2368 2369 if (intr & NJSC32_IRQ_TIMER) { 2370 TPRINTF(("%s: njsc32_intr: timer interrupt\n", 2371 sc->sc_dev.dv_xname)); 2372 } 2373 2374 if (intr & NJSC32_IRQ_RESELECT) { 2375 /* Reselection from a target */ 2376 njsc32_arbitration_failed(sc); /* just in case */ 2377 if ((cmd = sc->sc_curcmd) != NULL) { 2378 /* ? */ 2379 printf("%s: unexpected reselection\n", 2380 sc->sc_dev.dv_xname); 2381 sc->sc_curcmd = NULL; 2382 sc->sc_stat = NJSC32_STAT_IDLE; 2383 njsc32_end_cmd(sc, cmd, XS_DRIVER_STUFFUP); 2384 } 2385 2386 idbit = njsc32_read_1(sc, NJSC32_REG_RESELECT_ID); 2387 if ((idbit & (1 << NJSC32_INITIATOR_ID)) == 0 || 2388 (sc->sc_reselid = ffs(idbit & ~NJSC32_INITIATOR_ID) -1) 2389 < 0) { 2390 printf("%s: invalid reselection (id: %#x)\n", 2391 sc->sc_dev.dv_xname, idbit); 2392 sc->sc_stat = NJSC32_STAT_IDLE; /* XXX ? */ 2393 } else { 2394 sc->sc_stat = NJSC32_STAT_RESEL; 2395 TPRINTF(("%s: njsc32_intr: reselection from %d\n", 2396 sc->sc_dev.dv_xname, sc->sc_reselid)); 2397 } 2398 } 2399 2400 if (intr & NJSC32_IRQ_PHASE_CHANGE) { 2401 #if 1 /* XXX probably not needed */ 2402 if (sc->sc_stat == NJSC32_STAT_ARBIT) 2403 PRINTC(sc->sc_curcmd, 2404 ("njsc32_intr: cancel arbitration phase\n")); 2405 njsc32_arbitration_failed(sc); 2406 #endif 2407 /* current bus phase */ 2408 bus_phase = njsc32_read_1(sc, NJSC32_REG_SCSI_BUS_MONITOR) & 2409 NJSC32_BUSMON_PHASE_MASK; 2410 2411 switch (bus_phase) { 2412 case NJSC32_PHASE_MESSAGE_IN: 2413 njsc32_msgin(sc); 2414 break; 2415 2416 /* 2417 * target may suddenly become Status / Bus Free phase 2418 * to notify an error condition 2419 */ 2420 case NJSC32_PHASE_STATUS: 2421 printf("%s: unexpected bus phase: Status\n", 2422 sc->sc_dev.dv_xname); 2423 if ((cmd = sc->sc_curcmd) != NULL) { 2424 cmd->c_xs->status = 2425 njsc32_read_1(sc, NJSC32_REG_SCSI_CSB_IN); 2426 TPRINTC(cmd, ("njsc32_intr: Status %d\n", 2427 cmd->c_xs->status)); 2428 } 2429 break; 2430 case NJSC32_PHASE_BUSFREE: 2431 printf("%s: unexpected bus phase: Bus Free\n", 2432 sc->sc_dev.dv_xname); 2433 if ((cmd = sc->sc_curcmd) != NULL) { 2434 sc->sc_curcmd = NULL; 2435 sc->sc_stat = NJSC32_STAT_IDLE; 2436 if (cmd->c_xs->status != SCSI_QUEUE_FULL && 2437 cmd->c_xs->status != SCSI_BUSY) 2438 cmd->c_xs->status = SCSI_CHECK;/* XXX */ 2439 njsc32_end_cmd(sc, cmd, XS_BUSY); 2440 } 2441 goto out; 2442 default: 2443 #ifdef NJSC32_DEBUG 2444 printf("%s: unexpected bus phase: ", 2445 sc->sc_dev.dv_xname); 2446 switch (bus_phase) { 2447 case NJSC32_PHASE_COMMAND: 2448 printf("Command\n"); break; 2449 case NJSC32_PHASE_MESSAGE_OUT: 2450 printf("Message Out\n");break; 2451 case NJSC32_PHASE_DATA_IN: 2452 printf("Data In\n"); break; 2453 case NJSC32_PHASE_DATA_OUT: 2454 printf("Data Out\n"); break; 2455 case NJSC32_PHASE_RESELECT: 2456 printf("Reselect\n");break; 2457 default: printf("%#x\n", bus_phase); break; 2458 } 2459 #else 2460 printf("%s: unexpected bus phase: %#x", 2461 sc->sc_dev.dv_xname, bus_phase); 2462 #endif 2463 break; 2464 } 2465 } 2466 2467 if (intr & NJSC32_IRQ_AUTOSCSI) { 2468 /* 2469 * AutoSCSI interrupt 2470 */ 2471 auto_phase = njsc32_read_2(sc, NJSC32_REG_EXECUTE_PHASE); 2472 TPRINTF(("%s: njsc32_intr: AutoSCSI: %#x\n", 2473 sc->sc_dev.dv_xname, auto_phase)); 2474 njsc32_write_2(sc, NJSC32_REG_EXECUTE_PHASE, 0); 2475 2476 if (auto_phase & NJSC32_XPHASE_SEL_TIMEOUT) { 2477 cmd = sc->sc_curcmd; 2478 if (cmd == NULL) { 2479 printf("%s: sel no cmd\n", 2480 sc->sc_dev.dv_xname); 2481 goto out; 2482 } 2483 DPRINTC(cmd, ("njsc32_intr: selection timeout\n")); 2484 2485 sc->sc_curcmd = NULL; 2486 sc->sc_stat = NJSC32_STAT_IDLE; 2487 njsc32_end_cmd(sc, cmd, XS_SELTIMEOUT); 2488 2489 goto out; 2490 } 2491 2492 #ifdef NJSC32_TRACE 2493 if (auto_phase & NJSC32_XPHASE_COMMAND) { 2494 /* Command phase has been automatically processed */ 2495 TPRINTF(("%s: njsc32_intr: Command\n", 2496 sc->sc_dev.dv_xname)); 2497 } 2498 #endif 2499 #ifdef NJSC32_DEBUG 2500 if (auto_phase & NJSC32_XPHASE_ILLEGAL) { 2501 printf("%s: njsc32_intr: Illegal phase\n", 2502 sc->sc_dev.dv_xname); 2503 } 2504 #endif 2505 2506 if (auto_phase & NJSC32_XPHASE_PAUSED_MSG_IN) { 2507 TPRINTF(("%s: njsc32_intr: Process Message In\n", 2508 sc->sc_dev.dv_xname)); 2509 njsc32_msgin(sc); 2510 } 2511 2512 if (auto_phase & NJSC32_XPHASE_PAUSED_MSG_OUT) { 2513 TPRINTF(("%s: njsc32_intr: Process Message Out\n", 2514 sc->sc_dev.dv_xname)); 2515 njsc32_msgout(sc); 2516 } 2517 2518 cmd = sc->sc_curcmd; 2519 if (cmd == NULL) { 2520 TPRINTF(("%s: njsc32_intr: no cmd\n", 2521 sc->sc_dev.dv_xname)); 2522 goto out; 2523 } 2524 2525 if (auto_phase & 2526 (NJSC32_XPHASE_DATA_IN | NJSC32_XPHASE_DATA_OUT)) { 2527 #ifdef NJSC32_TRACE 2528 if (auto_phase & NJSC32_XPHASE_DATA_IN) 2529 PRINTC(cmd, ("njsc32_intr: data in done\n")); 2530 if (auto_phase & NJSC32_XPHASE_DATA_OUT) 2531 PRINTC(cmd, ("njsc32_intr: data out done\n")); 2532 printf("BM %u, SGT %u, SACK %u, SAVED_ACK %u\n", 2533 njsc32_read_4(sc, NJSC32_REG_BM_CNT), 2534 njsc32_read_4(sc, NJSC32_REG_SGT_ADR), 2535 njsc32_read_4(sc, NJSC32_REG_SACK_CNT), 2536 njsc32_read_4(sc, NJSC32_REG_SAVED_ACK_CNT)); 2537 #endif 2538 2539 /* 2540 * detected parity error on data transfer? 2541 */ 2542 if (njsc32_read_1(sc, NJSC32_REG_PARITY_STATUS) & 2543 (NJSC32_PARITYSTATUS_ERROR_LSB| 2544 NJSC32_PARITYSTATUS_ERROR_MSB)) { 2545 2546 PRINTC(cmd, ("datain: parity error\n")); 2547 2548 /* clear parity error */ 2549 njsc32_write_1(sc, NJSC32_REG_PARITY_CONTROL, 2550 NJSC32_PARITYCTL_CHECK_ENABLE | 2551 NJSC32_PARITYCTL_CLEAR_ERROR); 2552 2553 if (auto_phase & NJSC32_XPHASE_BUS_FREE) { 2554 /* 2555 * XXX command has already finished 2556 * -- what can we do? 2557 * 2558 * It is not clear current command 2559 * caused the error -- reset everything. 2560 */ 2561 njsc32_init(sc, 1); /* XXX */ 2562 } else { 2563 /* XXX does this case occur? */ 2564 #if 1 2565 printf("%s: datain: parity error\n", 2566 sc->sc_dev.dv_xname); 2567 #endif 2568 /* 2569 * Make attention condition and try 2570 * to send Initiator Detected Error 2571 * message. 2572 */ 2573 njsc32_init_msgout(sc); 2574 njsc32_add_msgout(sc, 2575 MSG_INITIATOR_DET_ERR); 2576 njsc32_write_4(sc, 2577 NJSC32_REG_SCSI_MSG_OUT, 2578 njsc32_get_auto_msgout(sc)); 2579 /* restart autoscsi with ATN */ 2580 njsc32_write_2(sc, 2581 NJSC32_REG_COMMAND_CONTROL, 2582 NJSC32_CMD_CLEAR_CDB_FIFO_PTR | 2583 NJSC32_CMD_AUTO_COMMAND_PHASE | 2584 NJSC32_CMD_AUTO_SCSI_RESTART | 2585 NJSC32_CMD_AUTO_MSGIN_00_04 | 2586 NJSC32_CMD_AUTO_MSGIN_02 | 2587 NJSC32_CMD_AUTO_ATN); 2588 } 2589 goto out; 2590 } 2591 2592 /* 2593 * data has been transferred, and current pointer 2594 * is changed 2595 */ 2596 njsc32_set_cur_ptr(cmd, cmd->c_dp_cur + 2597 njsc32_read_4(sc, NJSC32_REG_SACK_CNT)); 2598 } 2599 2600 if (auto_phase & NJSC32_XPHASE_MSGOUT) { 2601 /* Message Out phase has been automatically processed */ 2602 TPRINTC(cmd, ("njsc32_intr: Message Out\n")); 2603 if ((auto_phase & NJSC32_XPHASE_PAUSED_MSG_IN) == 0 && 2604 sc->sc_msgoutlen <= NJSC32_MSGOUT_MAX_AUTO) { 2605 njsc32_init_msgout(sc); 2606 } 2607 } 2608 2609 if (auto_phase & NJSC32_XPHASE_STATUS) { 2610 /* Status phase has been automatically processed */ 2611 cmd->c_xs->status = 2612 njsc32_read_1(sc, NJSC32_REG_SCSI_CSB_IN); 2613 TPRINTC(cmd, ("njsc32_intr: Status %#x\n", 2614 cmd->c_xs->status)); 2615 } 2616 2617 if (auto_phase & NJSC32_XPHASE_BUS_FREE) { 2618 /* AutoSCSI is finished */ 2619 2620 TPRINTC(cmd, ("njsc32_intr: Bus Free\n")); 2621 2622 sc->sc_stat = NJSC32_STAT_IDLE; 2623 sc->sc_curcmd = NULL; 2624 2625 njsc32_end_auto(sc, cmd, auto_phase); 2626 } 2627 goto out; 2628 } 2629 2630 if (intr & NJSC32_IRQ_FIFO_THRESHOLD) { 2631 /* XXX We use DMA, and this shouldn't happen */ 2632 printf("%s: njsc32_intr: FIFO\n", sc->sc_dev.dv_xname); 2633 njsc32_init(sc, 1); 2634 goto out; 2635 } 2636 if (intr & NJSC32_IRQ_PCI) { 2637 /* XXX? */ 2638 printf("%s: njsc32_intr: PCI\n", sc->sc_dev.dv_xname); 2639 } 2640 if (intr & NJSC32_IRQ_BMCNTERR) { 2641 /* XXX? */ 2642 printf("%s: njsc32_intr: BM\n", sc->sc_dev.dv_xname); 2643 } 2644 2645 out: 2646 /* go next command if controller is idle */ 2647 if (sc->sc_stat == NJSC32_STAT_IDLE) 2648 njsc32_start(sc); 2649 2650 #if 0 2651 /* enable interrupts */ 2652 njsc32_write_2(sc, NJSC32_REG_IRQ, 0); 2653 #endif 2654 2655 return 1; /* processed */ 2656 } 2657
Indexes created Fri Sep 26 08:10:20 GMT 2025