1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * PCI nexus DVMA and DMA core routines: 30 * dma_map/dma_bind_handle implementation 31 * bypass and peer-to-peer support 32 * fast track DVMA space allocation 33 * runtime DVMA debug 34 */ 35 #include <sys/types.h> 36 #include <sys/kmem.h> 37 #include <sys/async.h> 38 #include <sys/sysmacros.h> 39 #include <sys/sunddi.h> 40 #include <sys/machsystm.h> /* lddphys() */ 41 #include <sys/ddi_impldefs.h> 42 #include <vm/hat.h> 43 #include <sys/pci/pci_obj.h> 44 45 /*LINTLIBRARY*/ 46 47 static void 48 pci_sc_pg_inv(dev_info_t *dip, sc_t *sc_p, ddi_dma_impl_t *mp, off_t off, 49 size_t len) 50 { 51 dvma_addr_t dvma_addr, pg_off; 52 volatile uint64_t *invl_va = sc_p->sc_invl_reg; 53 54 if (!len) 55 len = mp->dmai_size; 56 57 pg_off = mp->dmai_offset; /* start min */ 58 dvma_addr = MAX(off, pg_off); /* lo */ 59 pg_off += mp->dmai_size; /* end max */ 60 pg_off = MIN(off + len, pg_off); /* hi */ 61 if (dvma_addr >= pg_off) { /* lo >= hi ? */ 62 DEBUG4(DBG_SC, dip, "%x+%x out of window [%x,%x)\n", 63 off, len, mp->dmai_offset, 64 mp->dmai_offset + mp->dmai_size); 65 return; 66 } 67 68 len = pg_off - dvma_addr; /* sz = hi - lo */ 69 dvma_addr += mp->dmai_mapping; /* start addr */ 70 pg_off = dvma_addr & IOMMU_PAGE_OFFSET; /* offset in 1st pg */ 71 len = IOMMU_BTOPR(len + pg_off); /* # of pages */ 72 dvma_addr ^= pg_off; 73 74 DEBUG2(DBG_SC, dip, "addr=%x+%x pages: \n", dvma_addr, len); 75 for (; len; len--, dvma_addr += IOMMU_PAGE_SIZE) { 76 DEBUG1(DBG_SC|DBG_CONT, dip, " %x", dvma_addr); 77 *invl_va = (uint64_t)dvma_addr; 78 } 79 DEBUG0(DBG_SC|DBG_CONT, dip, "\n"); 80 } 81 82 static void 83 pci_dma_sync_flag_wait(ddi_dma_impl_t *mp, sc_t *sc_p, uint32_t onstack) 84 { 85 hrtime_t start_time; 86 uint64_t loops = 0; 87 uint64_t sync_flag_pa = SYNC_BUF_PA(mp); 88 uint64_t sync_reg_pa = sc_p->sc_sync_reg_pa; 89 uint8_t stack_buf[128]; 90 91 stack_buf[0] = DDI_SUCCESS; 92 93 /* check for handle specific sync flag */ 94 if (sync_flag_pa) 95 goto start; 96 97 sync_flag_pa = sc_p->sc_sync_flag_pa; 98 99 if (onstack) { 100 sync_flag_pa = va_to_pa(stack_buf); 101 sync_flag_pa += PCI_SYNC_FLAG_SIZE; 102 sync_flag_pa >>= PCI_SYNC_FLAG_SZSHIFT; 103 sync_flag_pa <<= PCI_SYNC_FLAG_SZSHIFT; 104 goto start; 105 } 106 stack_buf[0] |= PCI_SYNC_FLAG_LOCKED; 107 mutex_enter(&sc_p->sc_sync_mutex); 108 start: 109 ASSERT(!(sync_flag_pa & PCI_SYNC_FLAG_SIZE - 1)); 110 stdphys(sync_flag_pa, 0); /* reset sync flag to 0 */ 111 /* membar #LoadStore|#StoreStore */ 112 stdphysio(sync_reg_pa, sync_flag_pa); 113 start_time = gethrtime(); 114 115 for (; gethrtime() - start_time < pci_sync_buf_timeout; loops++) 116 if (lddphys(sync_flag_pa)) 117 goto done; 118 119 if (!lddphys(sync_flag_pa)) 120 stack_buf[0] |= PCI_SYNC_FLAG_FAILED; 121 done: 122 DEBUG3(DBG_SC|DBG_CONT, 0, "flag wait loops=%lu ticks=%lu status=%x\n", 123 loops, gethrtime() - start_time, stack_buf[0]); 124 125 if (stack_buf[0] & PCI_SYNC_FLAG_LOCKED) 126 mutex_exit(&sc_p->sc_sync_mutex); 127 128 if (stack_buf[0] & PCI_SYNC_FLAG_FAILED) 129 cmn_err(CE_PANIC, "%p pci dma sync %lx %lx timeout!", 130 mp, sync_flag_pa, loops); 131 } 132 133 /* 134 * Cache RW Before During After 135 * 136 * STREAMING read no/no pg/no ctx,pg/no 137 * STREAMING write no/no pg/yes ctx,pg/yes 138 * CONSISTENT read no/no yes,no/no yes,no/no 139 * CONSISTENT write no/no yes,yes/yes yes,yes/yes 140 * 141 * STREAMING read ctx,pg/no 142 * STREAMING write ctx,pg/yes 143 * CONSISTENT read yes,no/no 144 * CONSISTENT write yes,yes/yes 145 */ 146 int 147 pci_dma_sync(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, 148 off_t off, size_t len, uint32_t sync_flag) 149 { 150 ddi_dma_impl_t *mp = (ddi_dma_impl_t *)handle; 151 int ret = ddi_get_instance(dip); 152 pci_t *pci_p = get_pci_soft_state(ret); 153 pbm_t *pbm_p = pci_p->pci_pbm_p; 154 uint32_t dev_flag = mp->dmai_rflags; 155 sc_t *sc_p; 156 157 DEBUG4(DBG_DMA_SYNC, dip, "%s%d flags=%x,%x\n", ddi_driver_name(rdip), 158 ddi_get_instance(rdip), dev_flag, sync_flag); 159 DEBUG4(DBG_SC, dip, "dmai_mapping=%x, dmai_sz=%x off=%x len=%x\n", 160 mp->dmai_mapping, mp->dmai_size, off, len); 161 DEBUG2(DBG_SC, dip, "mp=%p, ctx=%x\n", mp, MP2CTX(mp)); 162 163 if (!(mp->dmai_flags & DMAI_FLAGS_INUSE)) { 164 cmn_err(CE_WARN, "Unbound dma handle %p from %s%d", mp, 165 ddi_driver_name(rdip), ddi_get_instance(rdip)); 166 return (DDI_FAILURE); 167 } 168 169 if (mp->dmai_flags & DMAI_FLAGS_NOSYNC) 170 return (DDI_SUCCESS); 171 172 if (!(dev_flag & DDI_DMA_CONSISTENT)) 173 goto streaming; 174 175 if (sync_flag & PCI_DMA_SYNC_EXT) { 176 if (sync_flag & (PCI_DMA_SYNC_BEFORE | PCI_DMA_SYNC_POST) || 177 !(sync_flag & PCI_DMA_SYNC_WRITE)) 178 return (DDI_SUCCESS); 179 } else { 180 if (!(dev_flag & DDI_DMA_READ) || 181 ((sync_flag & PCI_DMA_SYNC_DDI_FLAGS) == 182 DDI_DMA_SYNC_FORDEV)) 183 return (DDI_SUCCESS); 184 } 185 186 pci_pbm_dma_sync(pbm_p, pbm_p->pbm_sync_ino); 187 return (DDI_SUCCESS); 188 189 streaming: 190 ASSERT(pci_stream_buf_exists && (pci_stream_buf_enable & 1 << ret)); 191 sc_p = pci_p->pci_sc_p; 192 ret = DDI_FAILURE; 193 194 if (sync_flag & PCI_DMA_SYNC_EXT) 195 goto ext; 196 197 if (mp->dmai_flags & DMAI_FLAGS_CONTEXT && pci_sc_use_contexts) 198 ret = pci_sc_ctx_inv(dip, sc_p, mp); 199 if (ret) 200 pci_sc_pg_inv(dip, sc_p, mp, off, len); 201 202 if ((dev_flag & DDI_DMA_READ) && 203 ((sync_flag & PCI_DMA_SYNC_DDI_FLAGS) != DDI_DMA_SYNC_FORDEV)) 204 goto wait; 205 206 return (DDI_SUCCESS); 207 ext: 208 if (sync_flag & PCI_DMA_SYNC_BEFORE) 209 return (DDI_SUCCESS); 210 if (sync_flag & PCI_DMA_SYNC_BAR) 211 goto wait_check; 212 if (sync_flag & PCI_DMA_SYNC_AFTER && 213 mp->dmai_flags & DMAI_FLAGS_CONTEXT && pci_sc_use_contexts) 214 ret = pci_sc_ctx_inv(dip, sc_p, mp); 215 if (ret) 216 pci_sc_pg_inv(dip, sc_p, mp, off, len); 217 wait_check: 218 if (sync_flag & PCI_DMA_SYNC_POST || !(sync_flag & PCI_DMA_SYNC_WRITE)) 219 return (DDI_SUCCESS); 220 wait: 221 pci_dma_sync_flag_wait(mp, sc_p, sync_flag & PCI_DMA_SYNC_PRIVATE); 222 return (DDI_SUCCESS); 223 } 224 225 int 226 pci_dma_handle_clean(dev_info_t *rdip, ddi_dma_handle_t h) 227 { 228 ddi_dma_impl_t *mp = (ddi_dma_impl_t *)h; 229 if ((mp->dmai_flags & DMAI_FLAGS_INUSE) == 0) 230 return (DDI_FAILURE); 231 mp->dmai_rflags |= DMP_NOSYNC; 232 mp->dmai_flags |= DMAI_FLAGS_NOSYNC; 233 return (DDI_SUCCESS); 234 } 235 236 /* 237 * pci_dma_allocmp - Allocate a pci dma implementation structure 238 * 239 * An extra ddi_dma_attr structure is bundled with the usual ddi_dma_impl 240 * to hold unmodified device limits. The ddi_dma_attr inside the 241 * ddi_dma_impl structure is augumented with system limits to enhance 242 * DVMA performance at runtime. The unaugumented device limits saved 243 * right after (accessed through the DEV_ATTR macro) is used 244 * strictly for peer-to-peer transfers which do not obey system limits. 245 * 246 * return: DDI_SUCCESS DDI_DMA_NORESOURCES 247 */ 248 ddi_dma_impl_t * 249 pci_dma_allocmp(dev_info_t *dip, dev_info_t *rdip, int (*waitfp)(caddr_t), 250 caddr_t arg) 251 { 252 ddi_dma_impl_t *mp; 253 int sleep = (waitfp == DDI_DMA_SLEEP) ? KM_SLEEP : KM_NOSLEEP; 254 255 /* Caution: we don't use zalloc to enhance performance! */ 256 if ((mp = kmem_alloc(sizeof (pci_dma_hdl_t), sleep)) == 0) { 257 DEBUG0(DBG_DMA_MAP, dip, "can't alloc dma_handle\n"); 258 if (waitfp != DDI_DMA_DONTWAIT) { 259 DEBUG0(DBG_DMA_MAP, dip, "alloc_mp kmem cb\n"); 260 ddi_set_callback(waitfp, arg, &pci_kmem_clid); 261 } 262 return (mp); 263 } 264 265 mp->dmai_rdip = rdip; 266 mp->dmai_flags = 0; 267 mp->dmai_pfnlst = NULL; 268 mp->dmai_winlst = NULL; 269 270 /* 271 * kmem_alloc debug: the following fields are not zero-ed 272 * mp->dmai_mapping = 0; 273 * mp->dmai_size = 0; 274 * mp->dmai_offset = 0; 275 * mp->dmai_minxfer = 0; 276 * mp->dmai_burstsizes = 0; 277 * mp->dmai_ndvmapages = 0; 278 * mp->dmai_pool/roffset = 0; 279 * mp->dmai_rflags = 0; 280 * mp->dmai_inuse/flags 281 * mp->dmai_nwin = 0; 282 * mp->dmai_winsize = 0; 283 * mp->dmai_nexus_private/tte = 0; 284 * mp->dmai_iopte/pfnlst 285 * mp->dmai_sbi/pfn0 = 0; 286 * mp->dmai_minfo/winlst/fdvma 287 * mp->dmai_rdip 288 * bzero(&mp->dmai_object, sizeof (ddi_dma_obj_t)); 289 * mp->dmai_cookie = 0; 290 */ 291 292 mp->dmai_attr.dma_attr_version = (uint_t)DMA_ATTR_VERSION; 293 mp->dmai_attr.dma_attr_flags = (uint_t)0; 294 mp->dmai_fault = 0; 295 mp->dmai_fault_check = NULL; 296 mp->dmai_fault_notify = NULL; 297 298 mp->dmai_error.err_ena = 0; 299 mp->dmai_error.err_status = DDI_FM_OK; 300 mp->dmai_error.err_expected = DDI_FM_ERR_UNEXPECTED; 301 mp->dmai_error.err_ontrap = NULL; 302 mp->dmai_error.err_fep = NULL; 303 mp->dmai_error.err_cf = NULL; 304 305 SYNC_BUF_PA(mp) = 0ull; 306 return (mp); 307 } 308 309 void 310 pci_dma_freemp(ddi_dma_impl_t *mp) 311 { 312 if (mp->dmai_ndvmapages > 1) 313 pci_dma_freepfn(mp); 314 if (mp->dmai_winlst) 315 pci_dma_freewin(mp); 316 kmem_free(mp, sizeof (pci_dma_hdl_t)); 317 } 318 319 void 320 pci_dma_freepfn(ddi_dma_impl_t *mp) 321 { 322 void *addr = mp->dmai_pfnlst; 323 ASSERT(!PCI_DMA_CANRELOC(mp)); 324 if (addr) { 325 size_t npages = mp->dmai_ndvmapages; 326 if (npages > 1) 327 kmem_free(addr, npages * sizeof (iopfn_t)); 328 mp->dmai_pfnlst = NULL; 329 } 330 mp->dmai_ndvmapages = 0; 331 } 332 333 /* 334 * pci_dma_lmts2hdl - alloate a ddi_dma_impl_t, validate practical limits 335 * and convert dmareq->dmar_limits to mp->dmai_attr 336 * 337 * ddi_dma_impl_t member modified input 338 * ------------------------------------------------------------------------ 339 * mp->dmai_minxfer - dev 340 * mp->dmai_burstsizes - dev 341 * mp->dmai_flags - no limit? peer-to-peer only? 342 * 343 * ddi_dma_attr member modified input 344 * ------------------------------------------------------------------------ 345 * mp->dmai_attr.dma_attr_addr_lo - dev lo, sys lo 346 * mp->dmai_attr.dma_attr_addr_hi - dev hi, sys hi 347 * mp->dmai_attr.dma_attr_count_max - dev count max, dev/sys lo/hi delta 348 * mp->dmai_attr.dma_attr_seg - 0 (no nocross restriction) 349 * mp->dmai_attr.dma_attr_align - 1 (no alignment restriction) 350 * 351 * The dlim_dmaspeed member of dmareq->dmar_limits is ignored. 352 */ 353 ddi_dma_impl_t * 354 pci_dma_lmts2hdl(dev_info_t *dip, dev_info_t *rdip, iommu_t *iommu_p, 355 ddi_dma_req_t *dmareq) 356 { 357 ddi_dma_impl_t *mp; 358 ddi_dma_attr_t *attr_p; 359 uint64_t syslo = iommu_p->iommu_dvma_base; 360 uint64_t syshi = iommu_p->iommu_dvma_end; 361 uint64_t fasthi = iommu_p->iommu_dvma_fast_end; 362 ddi_dma_lim_t *lim_p = dmareq->dmar_limits; 363 uint32_t count_max = lim_p->dlim_cntr_max; 364 uint64_t lo = lim_p->dlim_addr_lo; 365 uint64_t hi = lim_p->dlim_addr_hi; 366 if (hi <= lo) { 367 DEBUG0(DBG_DMA_MAP, dip, "Bad limits\n"); 368 return ((ddi_dma_impl_t *)DDI_DMA_NOMAPPING); 369 } 370 if (!count_max) 371 count_max--; 372 373 if (!(mp = pci_dma_allocmp(dip, rdip, dmareq->dmar_fp, 374 dmareq->dmar_arg))) 375 return (NULL); 376 377 /* store original dev input at the 2nd ddi_dma_attr */ 378 attr_p = DEV_ATTR(mp); 379 SET_DMAATTR(attr_p, lo, hi, -1, count_max); 380 SET_DMAALIGN(attr_p, 1); 381 382 lo = MAX(lo, syslo); 383 hi = MIN(hi, syshi); 384 if (hi <= lo) 385 mp->dmai_flags |= DMAI_FLAGS_PEER_ONLY; 386 count_max = MIN(count_max, hi - lo); 387 388 if (DEV_NOSYSLIMIT(lo, hi, syslo, fasthi, 1)) 389 mp->dmai_flags |= DMAI_FLAGS_NOFASTLIMIT | 390 DMAI_FLAGS_NOSYSLIMIT; 391 else { 392 if (DEV_NOFASTLIMIT(lo, hi, syslo, syshi, 1)) 393 mp->dmai_flags |= DMAI_FLAGS_NOFASTLIMIT; 394 } 395 if (PCI_DMA_NOCTX(rdip)) 396 mp->dmai_flags |= DMAI_FLAGS_NOCTX; 397 398 /* store augumented dev input to mp->dmai_attr */ 399 mp->dmai_minxfer = lim_p->dlim_minxfer; 400 mp->dmai_burstsizes = lim_p->dlim_burstsizes; 401 attr_p = &mp->dmai_attr; 402 SET_DMAATTR(attr_p, lo, hi, -1, count_max); 403 SET_DMAALIGN(attr_p, 1); 404 return (mp); 405 } 406 407 /* 408 * pci_dma_attr2hdl 409 * 410 * This routine is called from the alloc handle entry point to sanity check the 411 * dma attribute structure. 412 * 413 * use by: pci_dma_allochdl() 414 * 415 * return value: 416 * 417 * DDI_SUCCESS - on success 418 * DDI_DMA_BADATTR - attribute has invalid version number 419 * or address limits exclude dvma space 420 */ 421 int 422 pci_dma_attr2hdl(pci_t *pci_p, ddi_dma_impl_t *mp) 423 { 424 iommu_t *iommu_p = pci_p->pci_iommu_p; 425 uint64_t syslo, syshi; 426 ddi_dma_attr_t *attrp = DEV_ATTR(mp); 427 uint64_t hi = attrp->dma_attr_addr_hi; 428 uint64_t lo = attrp->dma_attr_addr_lo; 429 uint64_t align = attrp->dma_attr_align; 430 uint64_t nocross = attrp->dma_attr_seg; 431 uint64_t count_max = attrp->dma_attr_count_max; 432 433 DEBUG3(DBG_DMA_ALLOCH, pci_p->pci_dip, "attrp=%p cntr_max=%x.%08x\n", 434 attrp, HI32(count_max), LO32(count_max)); 435 DEBUG4(DBG_DMA_ALLOCH, pci_p->pci_dip, "hi=%x.%08x lo=%x.%08x\n", 436 HI32(hi), LO32(hi), HI32(lo), LO32(lo)); 437 DEBUG4(DBG_DMA_ALLOCH, pci_p->pci_dip, "seg=%x.%08x align=%x.%08x\n", 438 HI32(nocross), LO32(nocross), HI32(align), LO32(align)); 439 440 if (!nocross) 441 nocross--; 442 if (attrp->dma_attr_flags & DDI_DMA_FORCE_PHYSICAL) { /* BYPASS */ 443 444 DEBUG0(DBG_DMA_ALLOCH, pci_p->pci_dip, "bypass mode\n"); 445 /* if tomatillo ver <= 2.3 don't allow bypass */ 446 if (tomatillo_disallow_bypass) 447 return (DDI_DMA_BADATTR); 448 449 mp->dmai_flags |= DMAI_FLAGS_BYPASSREQ; 450 if (nocross != UINT64_MAX) 451 return (DDI_DMA_BADATTR); 452 if (align && (align > IOMMU_PAGE_SIZE)) 453 return (DDI_DMA_BADATTR); 454 align = 1; /* align on 1 page boundary */ 455 syslo = iommu_p->iommu_dma_bypass_base; 456 syshi = iommu_p->iommu_dma_bypass_end; 457 458 } else { /* IOMMU_XLATE or PEER_TO_PEER */ 459 align = MAX(align, IOMMU_PAGE_SIZE) - 1; 460 if ((align & nocross) != align) { 461 dev_info_t *rdip = mp->dmai_rdip; 462 cmn_err(CE_WARN, "%s%d dma_attr_seg not aligned", 463 NAMEINST(rdip)); 464 return (DDI_DMA_BADATTR); 465 } 466 align = IOMMU_BTOP(align + 1); 467 syslo = iommu_p->iommu_dvma_base; 468 syshi = iommu_p->iommu_dvma_end; 469 } 470 if (hi <= lo) { 471 dev_info_t *rdip = mp->dmai_rdip; 472 cmn_err(CE_WARN, "%s%d limits out of range", NAMEINST(rdip)); 473 return (DDI_DMA_BADATTR); 474 } 475 lo = MAX(lo, syslo); 476 hi = MIN(hi, syshi); 477 if (!count_max) 478 count_max--; 479 480 DEBUG4(DBG_DMA_ALLOCH, pci_p->pci_dip, "hi=%x.%08x, lo=%x.%08x\n", 481 HI32(hi), LO32(hi), HI32(lo), LO32(lo)); 482 if (hi <= lo) { /* peer transfers cannot have alignment & nocross */ 483 dev_info_t *rdip = mp->dmai_rdip; 484 cmn_err(CE_WARN, "%s%d peer only dev %p", NAMEINST(rdip), mp); 485 if ((nocross < UINT32_MAX) || (align > 1)) { 486 cmn_err(CE_WARN, "%s%d peer only device bad attr", 487 NAMEINST(rdip)); 488 return (DDI_DMA_BADATTR); 489 } 490 mp->dmai_flags |= DMAI_FLAGS_PEER_ONLY; 491 } else /* set practical counter_max value */ 492 count_max = MIN(count_max, hi - lo); 493 494 if (DEV_NOSYSLIMIT(lo, hi, syslo, syshi, align)) 495 mp->dmai_flags |= DMAI_FLAGS_NOSYSLIMIT | 496 DMAI_FLAGS_NOFASTLIMIT; 497 else { 498 syshi = iommu_p->iommu_dvma_fast_end; 499 if (DEV_NOFASTLIMIT(lo, hi, syslo, syshi, align)) 500 mp->dmai_flags |= DMAI_FLAGS_NOFASTLIMIT; 501 } 502 if (PCI_DMA_NOCTX(mp->dmai_rdip)) 503 mp->dmai_flags |= DMAI_FLAGS_NOCTX; 504 505 mp->dmai_minxfer = attrp->dma_attr_minxfer; 506 mp->dmai_burstsizes = attrp->dma_attr_burstsizes; 507 attrp = &mp->dmai_attr; 508 SET_DMAATTR(attrp, lo, hi, nocross, count_max); 509 return (DDI_SUCCESS); 510 } 511 512 /* 513 * set up consistent dma flags according to hardware capability 514 */ 515 uint32_t 516 pci_dma_consist_check(uint32_t req_flags, pbm_t *pbm_p) 517 { 518 if (!pci_stream_buf_enable || !pci_stream_buf_exists) 519 req_flags |= DDI_DMA_CONSISTENT; 520 if (req_flags & DDI_DMA_CONSISTENT && !pbm_p->pbm_sync_reg_pa) 521 req_flags |= DMP_NOSYNC; 522 return (req_flags); 523 } 524 525 #define TGT_PFN_INBETWEEN(pfn, bgn, end) ((pfn >= bgn) && (pfn <= end)) 526 527 /* 528 * pci_dma_type - determine which of the three types DMA (peer-to-peer, 529 * iommu bypass, or iommu translate) we are asked to do. 530 * Also checks pfn0 and rejects any non-peer-to-peer 531 * requests for peer-only devices. 532 * 533 * return values: 534 * DDI_DMA_NOMAPPING - can't get valid pfn0, or bad dma type 535 * DDI_SUCCESS 536 * 537 * dma handle members affected (set on exit): 538 * mp->dmai_object - dmareq->dmar_object 539 * mp->dmai_rflags - consistent?, nosync?, dmareq->dmar_flags 540 * mp->dmai_flags - DMA type 541 * mp->dmai_pfn0 - 1st page pfn (if va/size pair and not shadow) 542 * mp->dmai_roffset - initialized to starting IOMMU page offset 543 * mp->dmai_ndvmapages - # of total IOMMU pages of entire object 544 * mp->pdh_sync_buf_pa - dma sync buffer PA is DMA flow is supported 545 */ 546 int 547 pci_dma_type(pci_t *pci_p, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp) 548 { 549 dev_info_t *dip = pci_p->pci_dip; 550 ddi_dma_obj_t *dobj_p = &dmareq->dmar_object; 551 pbm_t *pbm_p = pci_p->pci_pbm_p; 552 page_t **pplist; 553 struct as *as_p; 554 uint32_t offset; 555 caddr_t vaddr; 556 pfn_t pfn0; 557 558 mp->dmai_rflags = pci_dma_consist_check(dmareq->dmar_flags, pbm_p); 559 mp->dmai_flags |= mp->dmai_rflags & DMP_NOSYNC ? DMAI_FLAGS_NOSYNC : 0; 560 561 switch (dobj_p->dmao_type) { 562 case DMA_OTYP_BUFVADDR: 563 case DMA_OTYP_VADDR: { 564 vaddr = dobj_p->dmao_obj.virt_obj.v_addr; 565 pplist = dobj_p->dmao_obj.virt_obj.v_priv; 566 as_p = dobj_p->dmao_obj.virt_obj.v_as; 567 if (as_p == NULL) 568 as_p = &kas; 569 570 DEBUG2(DBG_DMA_MAP, dip, "vaddr=%p pplist=%p\n", vaddr, pplist); 571 offset = (ulong_t)vaddr & IOMMU_PAGE_OFFSET; 572 573 if (pplist) { /* shadow list */ 574 mp->dmai_flags |= DMAI_FLAGS_PGPFN; 575 ASSERT(PAGE_LOCKED(*pplist)); 576 pfn0 = page_pptonum(*pplist); 577 } else if (pci_dvma_remap_enabled && as_p == &kas && 578 dobj_p->dmao_type != DMA_OTYP_BUFVADDR) { 579 int (*waitfp)(caddr_t) = dmareq->dmar_fp; 580 uint_t flags = ((waitfp == DDI_DMA_SLEEP)? 581 HAC_SLEEP : HAC_NOSLEEP) | HAC_PAGELOCK; 582 int ret; 583 584 ret = hat_add_callback(pci_dvma_cbid, vaddr, 585 IOMMU_PAGE_SIZE - offset, flags, mp, &pfn0, 586 MP_HAT_CB_COOKIE_PTR(mp, 0)); 587 588 if (pfn0 == PFN_INVALID && ret == ENOMEM) { 589 ASSERT(waitfp != DDI_DMA_SLEEP); 590 if (waitfp != DDI_DMA_DONTWAIT) { 591 ddi_set_callback(waitfp, 592 dmareq->dmar_arg, 593 &pci_kmem_clid); 594 return (DDI_DMA_NORESOURCES); 595 } 596 } 597 mp->dmai_flags |= DMAI_FLAGS_RELOC; 598 } else 599 pfn0 = hat_getpfnum(as_p->a_hat, vaddr); 600 } 601 break; 602 603 case DMA_OTYP_PAGES: 604 offset = dobj_p->dmao_obj.pp_obj.pp_offset; 605 mp->dmai_flags |= DMAI_FLAGS_PGPFN; 606 pfn0 = page_pptonum(dobj_p->dmao_obj.pp_obj.pp_pp); 607 ASSERT(PAGE_LOCKED(dobj_p->dmao_obj.pp_obj.pp_pp)); 608 break; 609 610 case DMA_OTYP_PADDR: 611 default: 612 cmn_err(CE_WARN, "%s%d requested unsupported dma type %x", 613 NAMEINST(mp->dmai_rdip), dobj_p->dmao_type); 614 return (DDI_DMA_NOMAPPING); 615 } 616 if (pfn0 == PFN_INVALID) { 617 cmn_err(CE_WARN, "%s%d: invalid pfn0 for DMA object %p", 618 NAMEINST(dip), dobj_p); 619 return (DDI_DMA_NOMAPPING); 620 } 621 if (TGT_PFN_INBETWEEN(pfn0, pbm_p->pbm_base_pfn, pbm_p->pbm_last_pfn)) { 622 mp->dmai_flags |= DMAI_FLAGS_PEER_TO_PEER; 623 goto done; /* leave bypass and dvma flag as 0 */ 624 } 625 if (PCI_DMA_ISPEERONLY(mp)) { 626 dev_info_t *rdip = mp->dmai_rdip; 627 cmn_err(CE_WARN, "Bad peer-to-peer req %s%d", NAMEINST(rdip)); 628 return (DDI_DMA_NOMAPPING); 629 } 630 mp->dmai_flags |= (mp->dmai_flags & DMAI_FLAGS_BYPASSREQ) ? 631 DMAI_FLAGS_BYPASS : DMAI_FLAGS_DVMA; 632 done: 633 mp->dmai_object = *dobj_p; /* whole object */ 634 mp->dmai_pfn0 = (void *)pfn0; /* cache pfn0 */ 635 mp->dmai_roffset = offset; /* win0 pg0 offset */ 636 mp->dmai_ndvmapages = IOMMU_BTOPR(offset + mp->dmai_object.dmao_size); 637 638 return (DDI_SUCCESS); 639 } 640 641 /* 642 * pci_dma_pgpfn - set up pfnlst array according to pages 643 * VA/size pair: <shadow IO, bypass, peer-to-peer>, or OTYP_PAGES 644 */ 645 /*ARGSUSED*/ 646 static int 647 pci_dma_pgpfn(pci_t *pci_p, ddi_dma_impl_t *mp, uint_t npages) 648 { 649 int i; 650 #ifdef DEBUG 651 dev_info_t *dip = pci_p->pci_dip; 652 #endif 653 switch (mp->dmai_object.dmao_type) { 654 case DMA_OTYP_BUFVADDR: 655 case DMA_OTYP_VADDR: { 656 page_t **pplist = mp->dmai_object.dmao_obj.virt_obj.v_priv; 657 DEBUG2(DBG_DMA_MAP, dip, "shadow pplist=%p, %x pages, pfns=", 658 pplist, npages); 659 for (i = 1; i < npages; i++) { 660 iopfn_t pfn = page_pptonum(pplist[i]); 661 ASSERT(PAGE_LOCKED(pplist[i])); 662 PCI_SET_MP_PFN1(mp, i, pfn); 663 DEBUG1(DBG_DMA_MAP|DBG_CONT, dip, "%x ", pfn); 664 } 665 DEBUG0(DBG_DMA_MAP|DBG_CONT, dip, "\n"); 666 } 667 break; 668 669 case DMA_OTYP_PAGES: { 670 page_t *pp = mp->dmai_object.dmao_obj.pp_obj.pp_pp->p_next; 671 DEBUG1(DBG_DMA_MAP, dip, "pp=%p pfns=", pp); 672 for (i = 1; i < npages; i++, pp = pp->p_next) { 673 iopfn_t pfn = page_pptonum(pp); 674 ASSERT(PAGE_LOCKED(pp)); 675 PCI_SET_MP_PFN1(mp, i, pfn); 676 DEBUG1(DBG_DMA_MAP|DBG_CONT, dip, "%x ", pfn); 677 } 678 DEBUG0(DBG_DMA_MAP|DBG_CONT, dip, "\n"); 679 } 680 break; 681 682 default: /* check is already done by pci_dma_type */ 683 ASSERT(0); 684 break; 685 } 686 return (DDI_SUCCESS); 687 } 688 689 /* 690 * pci_dma_vapfn - set up pfnlst array according to VA 691 * VA/size pair: <normal, bypass, peer-to-peer> 692 * pfn0 is skipped as it is already done. 693 * In this case, the cached pfn0 is used to fill pfnlst[0] 694 */ 695 static int 696 pci_dma_vapfn(pci_t *pci_p, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp, 697 uint_t npages) 698 { 699 dev_info_t *dip = pci_p->pci_dip; 700 int i; 701 caddr_t vaddr = (caddr_t)mp->dmai_object.dmao_obj.virt_obj.v_as; 702 struct hat *hat_p = vaddr ? ((struct as *)vaddr)->a_hat : kas.a_hat; 703 caddr_t sva; 704 int needcb = 0; 705 706 sva = (caddr_t)(((uintptr_t)mp->dmai_object.dmao_obj.virt_obj.v_addr + 707 IOMMU_PAGE_SIZE) & IOMMU_PAGE_MASK); 708 709 if (pci_dvma_remap_enabled && hat_p == kas.a_hat && 710 mp->dmai_object.dmao_type != DMA_OTYP_BUFVADDR) 711 needcb = 1; 712 713 for (vaddr = sva, i = 1; i < npages; i++, vaddr += IOMMU_PAGE_SIZE) { 714 pfn_t pfn; 715 716 if (needcb) { 717 int (*waitfp)(caddr_t) = dmareq->dmar_fp; 718 uint_t flags = ((waitfp == DDI_DMA_SLEEP)? 719 HAC_SLEEP : HAC_NOSLEEP) | HAC_PAGELOCK; 720 int ret; 721 722 ret = hat_add_callback(pci_dvma_cbid, vaddr, 723 IOMMU_PAGE_SIZE, flags, mp, &pfn, 724 MP_HAT_CB_COOKIE_PTR(mp, i)); 725 726 if (pfn == PFN_INVALID && ret == ENOMEM) { 727 ASSERT(waitfp != DDI_DMA_SLEEP); 728 if (waitfp != DDI_DMA_DONTWAIT) 729 ddi_set_callback(waitfp, 730 dmareq->dmar_arg, &pci_kmem_clid); 731 return (DDI_DMA_NORESOURCES); 732 } 733 } else 734 pfn = hat_getpfnum(hat_p, vaddr); 735 if (pfn == PFN_INVALID) 736 goto err_badpfn; 737 PCI_SET_MP_PFN1(mp, i, (iopfn_t)pfn); 738 DEBUG3(DBG_DMA_MAP, dip, "pci_dma_vapfn: mp=%p pfnlst[%x]=%x\n", 739 mp, i, (iopfn_t)pfn); 740 } 741 return (DDI_SUCCESS); 742 err_badpfn: 743 cmn_err(CE_WARN, "%s%d: bad page frame vaddr=%p", NAMEINST(dip), vaddr); 744 return (DDI_DMA_NOMAPPING); 745 } 746 747 /* 748 * pci_dma_pfn - Fills pfn list for all pages being DMA-ed. 749 * 750 * dependencies: 751 * mp->dmai_ndvmapages - set to total # of dma pages 752 * 753 * return value: 754 * DDI_SUCCESS 755 * DDI_DMA_NOMAPPING 756 */ 757 int 758 pci_dma_pfn(pci_t *pci_p, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp) 759 { 760 uint32_t npages = mp->dmai_ndvmapages; 761 int (*waitfp)(caddr_t) = dmareq->dmar_fp; 762 int i, ret, peer = PCI_DMA_ISPTP(mp); 763 764 pbm_t *pbm_p = pci_p->pci_pbm_p; 765 iopfn_t pfn_base = pbm_p->pbm_base_pfn; 766 iopfn_t pfn_last = pbm_p->pbm_last_pfn; 767 iopfn_t pfn_adj = peer ? pfn_base : 0; 768 769 DEBUG2(DBG_DMA_MAP, pci_p->pci_dip, "pci_dma_pfn: mp=%p pfn0=%x\n", 770 mp, MP_PFN0(mp) - pfn_adj); 771 /* 1 page: no array alloc/fill, no mixed mode check */ 772 if (npages == 1) { 773 PCI_SET_MP_PFN(mp, 0, MP_PFN0(mp) - pfn_adj); 774 return (DDI_SUCCESS); 775 } 776 /* allocate pfn array */ 777 if (!(mp->dmai_pfnlst = kmem_alloc(npages * sizeof (iopfn_t), 778 waitfp == DDI_DMA_SLEEP ? KM_SLEEP : KM_NOSLEEP))) { 779 if (waitfp != DDI_DMA_DONTWAIT) 780 ddi_set_callback(waitfp, dmareq->dmar_arg, 781 &pci_kmem_clid); 782 return (DDI_DMA_NORESOURCES); 783 } 784 /* fill pfn array */ 785 PCI_SET_MP_PFN(mp, 0, MP_PFN0(mp) - pfn_adj); /* pfnlst[0] */ 786 if ((ret = PCI_DMA_ISPGPFN(mp) ? pci_dma_pgpfn(pci_p, mp, npages) : 787 pci_dma_vapfn(pci_p, dmareq, mp, npages)) != DDI_SUCCESS) 788 goto err; 789 790 /* skip pfn0, check mixed mode and adjust peer to peer pfn */ 791 for (i = 1; i < npages; i++) { 792 iopfn_t pfn = PCI_GET_MP_PFN1(mp, i); 793 if (peer ^ TGT_PFN_INBETWEEN(pfn, pfn_base, pfn_last)) { 794 cmn_err(CE_WARN, "%s%d mixed mode DMA %lx %lx", 795 NAMEINST(mp->dmai_rdip), MP_PFN0(mp), pfn); 796 ret = DDI_DMA_NOMAPPING; /* mixed mode */ 797 goto err; 798 } 799 DEBUG3(DBG_DMA_MAP, pci_p->pci_dip, 800 "pci_dma_pfn: pfnlst[%x]=%x-%x\n", i, pfn, pfn_adj); 801 if (pfn_adj) 802 PCI_SET_MP_PFN1(mp, i, pfn - pfn_adj); 803 } 804 return (DDI_SUCCESS); 805 err: 806 pci_dvma_unregister_callbacks(pci_p, mp); 807 pci_dma_freepfn(mp); 808 return (ret); 809 } 810 811 /* 812 * pci_dvma_win() - trim requested DVMA size down to window size 813 * The 1st window starts from offset and ends at page-aligned boundary. 814 * From the 2nd window on, each window starts and ends at page-aligned 815 * boundary except the last window ends at wherever requested. 816 * 817 * accesses the following mp-> members: 818 * mp->dmai_attr.dma_attr_count_max 819 * mp->dmai_attr.dma_attr_seg 820 * mp->dmai_roffset - start offset of 1st window 821 * mp->dmai_rflags (redzone) 822 * mp->dmai_ndvmapages (for 1 page fast path) 823 * 824 * sets the following mp-> members: 825 * mp->dmai_size - xfer size, != winsize if 1st/last win (not fixed) 826 * mp->dmai_winsize - window size (no redzone), n * page size (fixed) 827 * mp->dmai_nwin - # of DMA windows of entire object (fixed) 828 * mp->dmai_rflags - remove partial flag if nwin == 1 (fixed) 829 * mp->dmai_winlst - NULL, window objects not used for DVMA (fixed) 830 * 831 * fixed - not changed across different DMA windows 832 */ 833 /*ARGSUSED*/ 834 int 835 pci_dvma_win(pci_t *pci_p, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp) 836 { 837 uint32_t redzone_sz = HAS_REDZONE(mp) ? IOMMU_PAGE_SIZE : 0; 838 size_t obj_sz = mp->dmai_object.dmao_size; 839 size_t xfer_sz; 840 ulong_t pg_off; 841 842 if ((mp->dmai_ndvmapages == 1) && !redzone_sz) { 843 mp->dmai_rflags &= ~DDI_DMA_PARTIAL; 844 mp->dmai_size = obj_sz; 845 mp->dmai_winsize = IOMMU_PAGE_SIZE; 846 mp->dmai_nwin = 1; 847 goto done; 848 } 849 850 pg_off = mp->dmai_roffset; 851 xfer_sz = obj_sz + redzone_sz; 852 853 /* include redzone in nocross check */ { 854 uint64_t nocross = mp->dmai_attr.dma_attr_seg; 855 if (xfer_sz + pg_off - 1 > nocross) 856 xfer_sz = nocross - pg_off + 1; 857 if (redzone_sz && (xfer_sz <= redzone_sz)) { 858 DEBUG5(DBG_DMA_MAP, pci_p->pci_dip, 859 "nocross too small %lx(%lx)+%lx+%x < %" PRIx64 "\n", 860 xfer_sz, obj_sz, pg_off, redzone_sz, nocross); 861 return (DDI_DMA_TOOBIG); 862 } 863 } 864 xfer_sz -= redzone_sz; /* restore transfer size */ 865 /* check counter max */ { 866 uint32_t count_max = mp->dmai_attr.dma_attr_count_max; 867 if (xfer_sz - 1 > count_max) 868 xfer_sz = count_max + 1; 869 } 870 if (xfer_sz >= obj_sz) { 871 mp->dmai_rflags &= ~DDI_DMA_PARTIAL; 872 mp->dmai_size = xfer_sz; 873 mp->dmai_winsize = P2ROUNDUP(xfer_sz + pg_off, IOMMU_PAGE_SIZE); 874 mp->dmai_nwin = 1; 875 goto done; 876 } 877 if (!(dmareq->dmar_flags & DDI_DMA_PARTIAL)) { 878 DEBUG4(DBG_DMA_MAP, pci_p->pci_dip, 879 "too big: %lx+%lx+%x > %lx\n", 880 obj_sz, pg_off, redzone_sz, xfer_sz); 881 return (DDI_DMA_TOOBIG); 882 } 883 884 xfer_sz = IOMMU_PTOB(IOMMU_BTOP(xfer_sz + pg_off)); /* page align */ 885 mp->dmai_size = xfer_sz - pg_off; /* 1st window xferrable size */ 886 mp->dmai_winsize = xfer_sz; /* redzone not in winsize */ 887 mp->dmai_nwin = (obj_sz + pg_off + xfer_sz - 1) / xfer_sz; 888 done: 889 mp->dmai_winlst = NULL; 890 dump_dma_handle(DBG_DMA_MAP, pci_p->pci_dip, mp); 891 return (DDI_SUCCESS); 892 } 893 894 /* 895 * fast track cache entry to iommu context, inserts 3 0 bits between 896 * upper 6-bits and lower 3-bits of the 9-bit cache entry 897 */ 898 #define IOMMU_FCE_TO_CTX(i) (((i) << 3) | ((i) & 0x7) | 0x38) 899 900 /* 901 * pci_dvma_map_fast - attempts to map fast trackable DVMA 902 */ 903 int 904 pci_dvma_map_fast(iommu_t *iommu_p, ddi_dma_impl_t *mp) 905 { 906 uint_t clustsz = pci_dvma_page_cache_clustsz; 907 uint_t entries = pci_dvma_page_cache_entries; 908 uint64_t *tte_addr; 909 uint64_t tte = GET_TTE_TEMPLATE(mp); 910 int i = iommu_p->iommu_dvma_addr_scan_start; 911 uint8_t *lock_addr = iommu_p->iommu_dvma_cache_locks + i; 912 iopfn_t *pfn_addr; 913 dvma_addr_t dvma_pg; 914 size_t npages = IOMMU_BTOP(mp->dmai_winsize); 915 #ifdef DEBUG 916 dev_info_t *dip = mp->dmai_rdip; 917 #endif 918 extern uint8_t ldstub(uint8_t *); 919 ASSERT(IOMMU_PTOB(npages) == mp->dmai_winsize); 920 ASSERT(npages + HAS_REDZONE(mp) <= clustsz); 921 922 for (; i < entries && ldstub(lock_addr); i++, lock_addr++); 923 if (i >= entries) { 924 lock_addr = iommu_p->iommu_dvma_cache_locks; 925 i = 0; 926 for (; i < entries && ldstub(lock_addr); i++, lock_addr++); 927 if (i >= entries) { 928 #ifdef PCI_DMA_PROF 929 pci_dvmaft_exhaust++; 930 #endif 931 return (DDI_DMA_NORESOURCES); 932 } 933 } 934 iommu_p->iommu_dvma_addr_scan_start = (i + 1) & (entries - 1); 935 if (PCI_DMA_USECTX(mp)) { 936 dvma_context_t ctx = IOMMU_FCE_TO_CTX(i); 937 tte |= IOMMU_CTX2TTE(ctx); 938 mp->dmai_flags |= DMAI_FLAGS_CONTEXT; 939 DEBUG1(DBG_DMA_MAP, dip, "fast: ctx=0x%x\n", ctx); 940 } 941 i *= clustsz; 942 tte_addr = iommu_p->iommu_tsb_vaddr + i; 943 dvma_pg = iommu_p->dvma_base_pg + i; 944 #ifdef DEBUG 945 for (i = 0; i < clustsz; i++) 946 ASSERT(TTE_IS_INVALID(tte_addr[i])); 947 #endif 948 *tte_addr = tte | IOMMU_PTOB(MP_PFN0(mp)); /* map page 0 */ 949 DEBUG5(DBG_DMA_MAP, dip, "fast %p:dvma_pg=%x tte0(%p)=%08x.%08x\n", mp, 950 dvma_pg, tte_addr, HI32(*tte_addr), LO32(*tte_addr)); 951 if (npages == 1) 952 goto tte_done; 953 pfn_addr = PCI_GET_MP_PFN1_ADDR(mp); /* short iommu_map_pages() */ 954 for (tte_addr++, i = 1; i < npages; i++, tte_addr++, pfn_addr++) { 955 *tte_addr = tte | IOMMU_PTOB(*pfn_addr); 956 DEBUG5(DBG_DMA_MAP, dip, "fast %p:tte(%p, %p)=%08x.%08x\n", mp, 957 tte_addr, pfn_addr, HI32(*tte_addr), LO32(*tte_addr)); 958 } 959 tte_done: 960 #ifdef PCI_DMA_PROF 961 pci_dvmaft_success++; 962 #endif 963 mp->dmai_mapping = mp->dmai_roffset | IOMMU_PTOB(dvma_pg); 964 mp->dmai_offset = 0; 965 mp->dmai_flags |= DMAI_FLAGS_FASTTRACK; 966 PCI_SAVE_MP_TTE(mp, tte); /* save TTE template for unmapping */ 967 if (DVMA_DBG_ON(iommu_p)) 968 pci_dvma_alloc_debug(iommu_p, (char *)mp->dmai_mapping, 969 mp->dmai_size, mp); 970 return (DDI_SUCCESS); 971 } 972 973 /* 974 * pci_dvma_map: map non-fasttrack DMA 975 * Use quantum cache if single page DMA. 976 */ 977 int 978 pci_dvma_map(ddi_dma_impl_t *mp, ddi_dma_req_t *dmareq, iommu_t *iommu_p) 979 { 980 uint_t npages = PCI_DMA_WINNPGS(mp); 981 dvma_addr_t dvma_pg, dvma_pg_index; 982 void *dvma_addr; 983 uint64_t tte = GET_TTE_TEMPLATE(mp); 984 int sleep = dmareq->dmar_fp == DDI_DMA_SLEEP ? VM_SLEEP : VM_NOSLEEP; 985 #ifdef DEBUG 986 dev_info_t *dip = mp->dmai_rdip; 987 #endif 988 /* 989 * allocate dvma space resource and map in the first window. 990 * (vmem_t *vmp, size_t size, 991 * size_t align, size_t phase, size_t nocross, 992 * void *minaddr, void *maxaddr, int vmflag) 993 */ 994 if ((npages == 1) && !HAS_REDZONE(mp) && HAS_NOSYSLIMIT(mp)) { 995 dvma_addr = vmem_alloc(iommu_p->iommu_dvma_map, 996 IOMMU_PAGE_SIZE, sleep); 997 mp->dmai_flags |= DMAI_FLAGS_VMEMCACHE; 998 #ifdef PCI_DMA_PROF 999 pci_dvma_vmem_alloc++; 1000 #endif 1001 } else { 1002 dvma_addr = vmem_xalloc(iommu_p->iommu_dvma_map, 1003 IOMMU_PTOB(npages + HAS_REDZONE(mp)), 1004 MAX(mp->dmai_attr.dma_attr_align, IOMMU_PAGE_SIZE), 1005 0, 1006 mp->dmai_attr.dma_attr_seg + 1, 1007 (void *)mp->dmai_attr.dma_attr_addr_lo, 1008 (void *)(mp->dmai_attr.dma_attr_addr_hi + 1), 1009 sleep); 1010 #ifdef PCI_DMA_PROF 1011 pci_dvma_vmem_xalloc++; 1012 #endif 1013 } 1014 dvma_pg = IOMMU_BTOP((ulong_t)dvma_addr); 1015 dvma_pg_index = dvma_pg - iommu_p->dvma_base_pg; 1016 DEBUG2(DBG_DMA_MAP, dip, "fallback dvma_pages: dvma_pg=%x index=%x\n", 1017 dvma_pg, dvma_pg_index); 1018 if (dvma_pg == 0) 1019 goto noresource; 1020 1021 /* allocate DVMA context */ 1022 if ((npages >= pci_context_minpages) && PCI_DMA_USECTX(mp)) { 1023 dvma_context_t ctx; 1024 if (ctx = pci_iommu_get_dvma_context(iommu_p, dvma_pg_index)) { 1025 tte |= IOMMU_CTX2TTE(ctx); 1026 mp->dmai_flags |= DMAI_FLAGS_CONTEXT; 1027 } 1028 } 1029 mp->dmai_mapping = mp->dmai_roffset | IOMMU_PTOB(dvma_pg); 1030 mp->dmai_offset = 0; 1031 PCI_SAVE_MP_TTE(mp, tte); /* mp->dmai_tte = tte */ 1032 iommu_map_pages(iommu_p, mp, dvma_pg, npages, 0); 1033 return (DDI_SUCCESS); 1034 noresource: 1035 if (dmareq->dmar_fp != DDI_DMA_DONTWAIT) { 1036 DEBUG0(DBG_DMA_MAP, dip, "dvma_pg 0 - set callback\n"); 1037 ddi_set_callback(dmareq->dmar_fp, dmareq->dmar_arg, 1038 &iommu_p->iommu_dvma_clid); 1039 } 1040 DEBUG0(DBG_DMA_MAP, dip, "vmem_xalloc - DDI_DMA_NORESOURCES\n"); 1041 return (DDI_DMA_NORESOURCES); 1042 } 1043 1044 void 1045 pci_dvma_unmap(iommu_t *iommu_p, ddi_dma_impl_t *mp) 1046 { 1047 size_t npages; 1048 dvma_addr_t dvma_addr = (dvma_addr_t)mp->dmai_mapping; 1049 dvma_addr_t dvma_pg = IOMMU_BTOP(dvma_addr); 1050 dvma_addr = IOMMU_PTOB(dvma_pg); 1051 1052 if (mp->dmai_flags & DMAI_FLAGS_FASTTRACK) { 1053 iopfn_t index = dvma_pg - iommu_p->dvma_base_pg; 1054 ASSERT(index % pci_dvma_page_cache_clustsz == 0); 1055 index /= pci_dvma_page_cache_clustsz; 1056 ASSERT(index < pci_dvma_page_cache_entries); 1057 iommu_p->iommu_dvma_cache_locks[index] = 0; 1058 #ifdef PCI_DMA_PROF 1059 pci_dvmaft_free++; 1060 #endif 1061 return; 1062 } 1063 npages = IOMMU_BTOP(mp->dmai_winsize) + HAS_REDZONE(mp); 1064 pci_vmem_free(iommu_p, mp, (void *)dvma_addr, npages); 1065 1066 if (mp->dmai_flags & DMAI_FLAGS_CONTEXT) 1067 pci_iommu_free_dvma_context(iommu_p, MP2CTX(mp)); 1068 } 1069 1070 void 1071 pci_dma_sync_unmap(dev_info_t *dip, dev_info_t *rdip, ddi_dma_impl_t *mp) 1072 { 1073 pci_t *pci_p = get_pci_soft_state(ddi_get_instance(dip)); 1074 iommu_t *iommu_p = pci_p->pci_iommu_p; 1075 uint64_t sync_buf_save = SYNC_BUF_PA(mp); 1076 uint32_t fast_track = mp->dmai_flags & DMAI_FLAGS_FASTTRACK; 1077 1078 if (fast_track) { 1079 dvma_addr_t dvma_pg = IOMMU_BTOP(mp->dmai_mapping); 1080 1081 SYNC_BUF_PA(mp) = IOMMU_PAGE_TTEPA(iommu_p, dvma_pg); 1082 ASSERT(!(SYNC_BUF_PA(mp) & PCI_SYNC_FLAG_SIZE - 1)); 1083 } 1084 1085 if (pci_dvma_sync_before_unmap) { 1086 pci_dma_sync(dip, rdip, (ddi_dma_handle_t)mp, 0, 0, 1087 DDI_DMA_SYNC_FORCPU); 1088 iommu_unmap_window(iommu_p, mp); 1089 } else { 1090 iommu_unmap_window(iommu_p, mp); 1091 pci_dma_sync(dip, rdip, (ddi_dma_handle_t)mp, 0, 0, 1092 DDI_DMA_SYNC_FORCPU); 1093 } 1094 1095 if (fast_track) 1096 SYNC_BUF_PA(mp) = sync_buf_save; 1097 } 1098 1099 /* 1100 * DVMA mappings may have multiple windows, but each window always have 1101 * one segment. 1102 */ 1103 int 1104 pci_dvma_ctl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_impl_t *mp, 1105 enum ddi_dma_ctlops cmd, off_t *offp, size_t *lenp, caddr_t *objp, 1106 uint_t cache_flags) 1107 { 1108 switch (cmd) { 1109 case DDI_DMA_SYNC: 1110 return (pci_dma_sync(dip, rdip, (ddi_dma_handle_t)mp, 1111 *offp, *lenp, cache_flags)); 1112 1113 case DDI_DMA_HTOC: { 1114 int ret; 1115 off_t wo_off, off = *offp; /* wo_off: wnd's obj offset */ 1116 uint_t win_size = mp->dmai_winsize; 1117 ddi_dma_cookie_t *cp = (ddi_dma_cookie_t *)objp; 1118 1119 if (off >= mp->dmai_object.dmao_size) { 1120 cmn_err(CE_WARN, "%s%d invalid dma_htoc offset %lx", 1121 NAMEINST(mp->dmai_rdip), off); 1122 return (DDI_FAILURE); 1123 } 1124 off += mp->dmai_roffset; 1125 ret = pci_dma_win(dip, rdip, (ddi_dma_handle_t)mp, 1126 off / win_size, &wo_off, NULL, cp, NULL); /* lenp == NULL */ 1127 if (ret) 1128 return (ret); 1129 DEBUG4(DBG_DMA_CTL, dip, "HTOC:cookie=%x+%lx off=%lx,%lx\n", 1130 cp->dmac_address, cp->dmac_size, off, *offp); 1131 1132 /* adjust cookie addr/len if we are not on window boundary */ 1133 ASSERT((off % win_size) == (off - 1134 (PCI_DMA_CURWIN(mp) ? mp->dmai_roffset : 0) - wo_off)); 1135 off = PCI_DMA_CURWIN(mp) ? off % win_size : *offp; 1136 ASSERT(cp->dmac_size > off); 1137 cp->dmac_laddress += off; 1138 cp->dmac_size -= off; 1139 DEBUG5(DBG_DMA_CTL, dip, 1140 "HTOC:mp=%p cookie=%x+%lx off=%lx,%lx\n", 1141 mp, cp->dmac_address, cp->dmac_size, off, wo_off); 1142 } 1143 return (DDI_SUCCESS); 1144 1145 case DDI_DMA_REPWIN: 1146 *offp = mp->dmai_offset; 1147 *lenp = mp->dmai_size; 1148 return (DDI_SUCCESS); 1149 1150 case DDI_DMA_MOVWIN: { 1151 off_t off = *offp; 1152 if (off >= mp->dmai_object.dmao_size) 1153 return (DDI_FAILURE); 1154 off += mp->dmai_roffset; 1155 return (pci_dma_win(dip, rdip, (ddi_dma_handle_t)mp, 1156 off / mp->dmai_winsize, offp, lenp, 1157 (ddi_dma_cookie_t *)objp, NULL)); 1158 } 1159 1160 case DDI_DMA_NEXTWIN: { 1161 window_t win = PCI_DMA_CURWIN(mp); 1162 if (offp) { 1163 if (*(window_t *)offp != win) { /* window not active */ 1164 *(window_t *)objp = win; /* return cur win */ 1165 return (DDI_DMA_STALE); 1166 } 1167 win++; 1168 } else /* map win 0 */ 1169 win = 0; 1170 if (win >= mp->dmai_nwin) { 1171 *(window_t *)objp = win - 1; 1172 return (DDI_DMA_DONE); 1173 } 1174 if (pci_dma_win(dip, rdip, (ddi_dma_handle_t)mp, 1175 win, 0, 0, 0, 0)) { 1176 *(window_t *)objp = win - 1; 1177 return (DDI_FAILURE); 1178 } 1179 *(window_t *)objp = win; 1180 } 1181 return (DDI_SUCCESS); 1182 1183 case DDI_DMA_NEXTSEG: 1184 if (*(window_t *)offp != PCI_DMA_CURWIN(mp)) 1185 return (DDI_DMA_STALE); 1186 if (lenp) /* only 1 seg allowed */ 1187 return (DDI_DMA_DONE); 1188 /* return mp as seg 0 */ 1189 *(ddi_dma_seg_t *)objp = (ddi_dma_seg_t)mp; 1190 return (DDI_SUCCESS); 1191 1192 case DDI_DMA_SEGTOC: 1193 MAKE_DMA_COOKIE((ddi_dma_cookie_t *)objp, mp->dmai_mapping, 1194 mp->dmai_size); 1195 *offp = mp->dmai_offset; 1196 *lenp = mp->dmai_size; 1197 return (DDI_SUCCESS); 1198 1199 case DDI_DMA_COFF: { 1200 ddi_dma_cookie_t *cp = (ddi_dma_cookie_t *)offp; 1201 if (cp->dmac_address < mp->dmai_mapping || 1202 (cp->dmac_address + cp->dmac_size) > 1203 (mp->dmai_mapping + mp->dmai_size)) 1204 return (DDI_FAILURE); 1205 *objp = (caddr_t)(cp->dmac_address - mp->dmai_mapping + 1206 mp->dmai_offset); 1207 } 1208 return (DDI_SUCCESS); 1209 1210 case DDI_DMA_REMAP: 1211 if (pci_dvma_remap_enabled) 1212 return (pci_dvma_remap(dip, rdip, mp, *offp, *lenp)); 1213 return (DDI_FAILURE); 1214 1215 default: 1216 DEBUG3(DBG_DMA_CTL, dip, "unknown command (%x): rdip=%s%d\n", 1217 cmd, ddi_driver_name(rdip), ddi_get_instance(rdip)); 1218 break; 1219 } 1220 return (DDI_FAILURE); 1221 } 1222 1223 void 1224 pci_dma_freewin(ddi_dma_impl_t *mp) 1225 { 1226 pci_dma_win_t *win_p = mp->dmai_winlst, *win2_p; 1227 for (win2_p = win_p; win_p; win2_p = win_p) { 1228 win_p = win2_p->win_next; 1229 kmem_free(win2_p, sizeof (pci_dma_win_t) + 1230 sizeof (ddi_dma_cookie_t) * win2_p->win_ncookies); 1231 } 1232 mp->dmai_nwin = 0; 1233 mp->dmai_winlst = NULL; 1234 } 1235 1236 /* 1237 * pci_dma_newwin - create a dma window object and cookies 1238 * 1239 * After the initial scan in pci_dma_physwin(), which identifies 1240 * a portion of the pfn array that belongs to a dma window, 1241 * we are called to allocate and initialize representing memory 1242 * resources. We know from the 1st scan the number of cookies 1243 * or dma segment in this window so we can allocate a contiguous 1244 * memory array for the dma cookies (The implementation of 1245 * ddi_dma_nextcookie(9f) dictates dma cookies be contiguous). 1246 * 1247 * A second round scan is done on the pfn array to identify 1248 * each dma segment and initialize its corresponding dma cookie. 1249 * We don't need to do all the safety checking and we know they 1250 * all belong to the same dma window. 1251 * 1252 * Input: cookie_no - # of cookies identified by the 1st scan 1253 * start_idx - subscript of the pfn array for the starting pfn 1254 * end_idx - subscript of the last pfn in dma window 1255 * win_pp - pointer to win_next member of previous window 1256 * Return: DDI_SUCCESS - with **win_pp as newly created window object 1257 * DDI_DMA_NORESROUCE - caller frees all previous window objs 1258 * Note: Each cookie and window size are all initialized on page 1259 * boundary. This is not true for the 1st cookie of the 1st 1260 * window and the last cookie of the last window. 1261 * We fix that later in upper layer which has access to size 1262 * and offset info. 1263 * 1264 */ 1265 static int 1266 pci_dma_newwin(ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp, uint32_t cookie_no, 1267 uint32_t start_idx, uint32_t end_idx, pci_dma_win_t **win_pp, 1268 uint64_t count_max, uint64_t bypass_prefix) 1269 { 1270 int (*waitfp)(caddr_t) = dmareq->dmar_fp; 1271 ddi_dma_cookie_t *cookie_p; 1272 uint32_t pfn_no = 1; 1273 iopfn_t pfn = PCI_GET_MP_PFN(mp, start_idx); 1274 iopfn_t prev_pfn = pfn; 1275 uint64_t seg_pfn0 = pfn; 1276 size_t sz = cookie_no * sizeof (ddi_dma_cookie_t); 1277 pci_dma_win_t *win_p = kmem_alloc(sizeof (pci_dma_win_t) + sz, 1278 waitfp == DDI_DMA_SLEEP ? KM_SLEEP : KM_NOSLEEP); 1279 if (!win_p) 1280 goto noresource; 1281 1282 win_p->win_next = NULL; 1283 win_p->win_ncookies = cookie_no; 1284 win_p->win_curseg = 0; /* start from segment 0 */ 1285 win_p->win_size = IOMMU_PTOB(end_idx - start_idx + 1); 1286 /* win_p->win_offset is left uninitialized */ 1287 1288 cookie_p = (ddi_dma_cookie_t *)(win_p + 1); 1289 start_idx++; 1290 for (; start_idx <= end_idx; start_idx++, prev_pfn = pfn, pfn_no++) { 1291 pfn = PCI_GET_MP_PFN1(mp, start_idx); 1292 if ((pfn == prev_pfn + 1) && 1293 (IOMMU_PTOB(pfn_no + 1) - 1 <= count_max)) 1294 continue; 1295 1296 /* close up the cookie up to (including) prev_pfn */ 1297 MAKE_DMA_COOKIE(cookie_p, IOMMU_PTOB(seg_pfn0) | bypass_prefix, 1298 IOMMU_PTOB(pfn_no)); 1299 DEBUG2(DBG_BYPASS, mp->dmai_rdip, "cookie %p (%x pages)\n", 1300 IOMMU_PTOB(seg_pfn0) | bypass_prefix, pfn_no); 1301 1302 cookie_p++; /* advance to next available cookie cell */ 1303 pfn_no = 0; 1304 seg_pfn0 = pfn; /* start a new segment from current pfn */ 1305 } 1306 MAKE_DMA_COOKIE(cookie_p, IOMMU_PTOB(seg_pfn0) | bypass_prefix, 1307 IOMMU_PTOB(pfn_no)); 1308 DEBUG3(DBG_BYPASS, mp->dmai_rdip, "cookie %p (%x pages) of total %x\n", 1309 IOMMU_PTOB(seg_pfn0) | bypass_prefix, pfn_no, cookie_no); 1310 #ifdef DEBUG 1311 cookie_p++; 1312 ASSERT((cookie_p - (ddi_dma_cookie_t *)(win_p + 1)) == cookie_no); 1313 #endif 1314 *win_pp = win_p; 1315 return (DDI_SUCCESS); 1316 noresource: 1317 if (waitfp != DDI_DMA_DONTWAIT) 1318 ddi_set_callback(waitfp, dmareq->dmar_arg, &pci_kmem_clid); 1319 return (DDI_DMA_NORESOURCES); 1320 } 1321 1322 /* 1323 * pci_dma_adjust - adjust 1st and last cookie and window sizes 1324 * remove initial dma page offset from 1st cookie and window size 1325 * remove last dma page remainder from last cookie and window size 1326 * fill win_offset of each dma window according to just fixed up 1327 * each window sizes 1328 * pci_dma_win_t members modified: 1329 * win_p->win_offset - this window's offset within entire DMA object 1330 * win_p->win_size - xferrable size (in bytes) for this window 1331 * 1332 * ddi_dma_impl_t members modified: 1333 * mp->dmai_size - 1st window xferrable size 1334 * mp->dmai_offset - 0, which is the dma offset of the 1st window 1335 * 1336 * ddi_dma_cookie_t members modified: 1337 * cookie_p->dmac_size - 1st and last cookie remove offset or remainder 1338 * cookie_p->dmac_laddress - 1st cookie add page offset 1339 */ 1340 static void 1341 pci_dma_adjust(ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp, pci_dma_win_t *win_p) 1342 { 1343 ddi_dma_cookie_t *cookie_p = (ddi_dma_cookie_t *)(win_p + 1); 1344 size_t pg_offset = mp->dmai_roffset; 1345 size_t win_offset = 0; 1346 1347 cookie_p->dmac_size -= pg_offset; 1348 cookie_p->dmac_laddress |= pg_offset; 1349 win_p->win_size -= pg_offset; 1350 DEBUG1(DBG_BYPASS, mp->dmai_rdip, "pg0 adjust %lx\n", pg_offset); 1351 1352 mp->dmai_size = win_p->win_size; 1353 mp->dmai_offset = 0; 1354 1355 pg_offset += mp->dmai_object.dmao_size; 1356 pg_offset &= IOMMU_PAGE_OFFSET; 1357 if (pg_offset) 1358 pg_offset = IOMMU_PAGE_SIZE - pg_offset; 1359 DEBUG1(DBG_BYPASS, mp->dmai_rdip, "last pg adjust %lx\n", pg_offset); 1360 1361 for (; win_p->win_next; win_p = win_p->win_next) { 1362 DEBUG1(DBG_BYPASS, mp->dmai_rdip, "win off %p\n", win_offset); 1363 win_p->win_offset = win_offset; 1364 win_offset += win_p->win_size; 1365 } 1366 /* last window */ 1367 win_p->win_offset = win_offset; 1368 cookie_p = (ddi_dma_cookie_t *)(win_p + 1); 1369 cookie_p[win_p->win_ncookies - 1].dmac_size -= pg_offset; 1370 win_p->win_size -= pg_offset; 1371 ASSERT((win_offset + win_p->win_size) == mp->dmai_object.dmao_size); 1372 } 1373 1374 /* 1375 * pci_dma_physwin() - carve up dma windows using physical addresses. 1376 * Called to handle iommu bypass and pci peer-to-peer transfers. 1377 * Calls pci_dma_newwin() to allocate window objects. 1378 * 1379 * Dependency: mp->dmai_pfnlst points to an array of pfns 1380 * 1381 * 1. Each dma window is represented by a pci_dma_win_t object. 1382 * The object will be casted to ddi_dma_win_t and returned 1383 * to leaf driver through the DDI interface. 1384 * 2. Each dma window can have several dma segments with each 1385 * segment representing a physically contiguous either memory 1386 * space (if we are doing an iommu bypass transfer) or pci address 1387 * space (if we are doing a peer-to-peer transfer). 1388 * 3. Each segment has a DMA cookie to program the DMA engine. 1389 * The cookies within each DMA window must be located in a 1390 * contiguous array per ddi_dma_nextcookie(9f). 1391 * 4. The number of DMA segments within each DMA window cannot exceed 1392 * mp->dmai_attr.dma_attr_sgllen. If the transfer size is 1393 * too large to fit in the sgllen, the rest needs to be 1394 * relocated to the next dma window. 1395 * 5. Peer-to-peer DMA segment follows device hi, lo, count_max, 1396 * and nocross restrictions while bypass DMA follows the set of 1397 * restrictions with system limits factored in. 1398 * 1399 * Return: 1400 * mp->dmai_winlst - points to a link list of pci_dma_win_t objects. 1401 * Each pci_dma_win_t object on the link list contains 1402 * infomation such as its window size (# of pages), 1403 * starting offset (also see Restriction), an array of 1404 * DMA cookies, and # of cookies in the array. 1405 * mp->dmai_pfnlst - NULL, the pfn list is freed to conserve memory. 1406 * mp->dmai_nwin - # of total DMA windows on mp->dmai_winlst. 1407 * mp->dmai_mapping - starting cookie address 1408 * mp->dmai_rflags - consistent, nosync, no redzone 1409 * mp->dmai_cookie - start of cookie table of the 1st DMA window 1410 * 1411 * Restriction: 1412 * Each pci_dma_win_t object can theoratically start from any offset 1413 * since the iommu is not involved. However, this implementation 1414 * always make windows start from page aligned offset (except 1415 * the 1st window, which follows the requested offset) due to the 1416 * fact that we are handed a pfn list. This does require device's 1417 * count_max and attr_seg to be at least IOMMU_PAGE_SIZE aligned. 1418 */ 1419 int 1420 pci_dma_physwin(pci_t *pci_p, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp) 1421 { 1422 uint_t npages = mp->dmai_ndvmapages; 1423 int ret, sgllen = mp->dmai_attr.dma_attr_sgllen; 1424 iopfn_t pfn_lo, pfn_hi, prev_pfn, bypass_pfn; 1425 iopfn_t pfn = PCI_GET_MP_PFN(mp, 0); 1426 uint32_t i, win_no = 0, pfn_no = 1, win_pfn0_index = 0, cookie_no = 0; 1427 uint64_t count_max, bypass = PCI_DMA_BYPASS_PREFIX(mp, pfn); 1428 pci_dma_win_t **win_pp = (pci_dma_win_t **)&mp->dmai_winlst; 1429 ddi_dma_cookie_t *cookie0_p; 1430 1431 if (PCI_DMA_ISPTP(mp)) { /* ignore sys limits for peer-to-peer */ 1432 ddi_dma_attr_t *dev_attr_p = DEV_ATTR(mp); 1433 iopfn_t pfn_base = pci_p->pci_pbm_p->pbm_base_pfn; 1434 iopfn_t pfn_last = pci_p->pci_pbm_p->pbm_last_pfn - pfn_base; 1435 uint64_t nocross = dev_attr_p->dma_attr_seg; 1436 if (nocross && (nocross < UINT32_MAX)) 1437 return (DDI_DMA_NOMAPPING); 1438 if (dev_attr_p->dma_attr_align > IOMMU_PAGE_SIZE) 1439 return (DDI_DMA_NOMAPPING); 1440 pfn_lo = IOMMU_BTOP(dev_attr_p->dma_attr_addr_lo); 1441 pfn_hi = IOMMU_BTOP(dev_attr_p->dma_attr_addr_hi); 1442 pfn_hi = MIN(pfn_hi, pfn_last); 1443 if ((pfn_lo > pfn_hi) || (pfn < pfn_lo)) 1444 return (DDI_DMA_NOMAPPING); 1445 count_max = dev_attr_p->dma_attr_count_max; 1446 count_max = MIN(count_max, nocross); 1447 /* 1448 * the following count_max trim is not done because we are 1449 * making sure pfn_lo <= pfn <= pfn_hi inside the loop 1450 * count_max=MIN(count_max, IOMMU_PTOB(pfn_hi - pfn_lo + 1)-1); 1451 */ 1452 } else { /* bypass hi/lo/count_max have been processed by attr2hdl() */ 1453 count_max = mp->dmai_attr.dma_attr_count_max; 1454 pfn_lo = IOMMU_BTOP(mp->dmai_attr.dma_attr_addr_lo); 1455 pfn_hi = IOMMU_BTOP(mp->dmai_attr.dma_attr_addr_hi); 1456 } 1457 1458 bypass_pfn = IOMMU_BTOP(bypass); 1459 1460 for (prev_pfn = (bypass_pfn | pfn), i = 1; i < npages; 1461 i++, prev_pfn = pfn, pfn_no++) { 1462 pfn = bypass_pfn | PCI_GET_MP_PFN1(mp, i); 1463 if ((pfn == prev_pfn + 1) && 1464 (IOMMU_PTOB(pfn_no + 1) - 1 <= count_max)) 1465 continue; 1466 if ((pfn < pfn_lo) || (prev_pfn > pfn_hi)) { 1467 ret = DDI_DMA_NOMAPPING; 1468 goto err; 1469 } 1470 cookie_no++; 1471 pfn_no = 0; 1472 if (cookie_no < sgllen) 1473 continue; 1474 1475 DEBUG3(DBG_BYPASS, mp->dmai_rdip, "newwin pfn[%x-%x] %x cks\n", 1476 win_pfn0_index, i - 1, cookie_no); 1477 if (ret = pci_dma_newwin(dmareq, mp, cookie_no, 1478 win_pfn0_index, i - 1, win_pp, count_max, bypass)) 1479 goto err; 1480 1481 win_pp = &(*win_pp)->win_next; /* win_pp = *(win_pp) */ 1482 win_no++; 1483 win_pfn0_index = i; 1484 cookie_no = 0; 1485 } 1486 if (pfn > pfn_hi) { 1487 ret = DDI_DMA_NOMAPPING; 1488 goto err; 1489 } 1490 cookie_no++; 1491 DEBUG3(DBG_BYPASS, mp->dmai_rdip, "newwin pfn[%x-%x] %x cks\n", 1492 win_pfn0_index, i - 1, cookie_no); 1493 if (ret = pci_dma_newwin(dmareq, mp, cookie_no, win_pfn0_index, 1494 i - 1, win_pp, count_max, bypass)) 1495 goto err; 1496 win_no++; 1497 pci_dma_adjust(dmareq, mp, mp->dmai_winlst); 1498 mp->dmai_nwin = win_no; 1499 mp->dmai_rflags |= DDI_DMA_CONSISTENT; 1500 if (!pci_p->pci_pbm_p->pbm_sync_reg_pa) { 1501 mp->dmai_rflags |= DMP_NOSYNC; 1502 mp->dmai_flags |= DMAI_FLAGS_NOSYNC; 1503 } 1504 mp->dmai_rflags &= ~DDI_DMA_REDZONE; 1505 cookie0_p = (ddi_dma_cookie_t *)(WINLST(mp) + 1); 1506 mp->dmai_cookie = WINLST(mp)->win_ncookies > 1 ? cookie0_p + 1 : 0; 1507 mp->dmai_mapping = cookie0_p->dmac_laddress; 1508 1509 pci_dma_freepfn(mp); 1510 return (DDI_DMA_MAPPED); 1511 err: 1512 pci_dma_freewin(mp); 1513 return (ret); 1514 } 1515 1516 /*ARGSUSED*/ 1517 int 1518 pci_dma_ctl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_impl_t *mp, 1519 enum ddi_dma_ctlops cmd, off_t *offp, size_t *lenp, caddr_t *objp, 1520 uint_t cache_flags) 1521 { 1522 switch (cmd) { 1523 case DDI_DMA_SYNC: /* XXX */ 1524 return (DDI_SUCCESS); 1525 1526 case DDI_DMA_HTOC: { 1527 off_t off = *offp; 1528 ddi_dma_cookie_t *loop_cp, *cp; 1529 pci_dma_win_t *win_p = mp->dmai_winlst; 1530 1531 if (off >= mp->dmai_object.dmao_size) 1532 return (DDI_FAILURE); 1533 1534 /* locate window */ 1535 while (win_p->win_offset + win_p->win_size <= off) 1536 win_p = win_p->win_next; 1537 1538 loop_cp = cp = (ddi_dma_cookie_t *)(win_p + 1); 1539 mp->dmai_offset = win_p->win_offset; 1540 mp->dmai_size = win_p->win_size; 1541 mp->dmai_mapping = cp->dmac_laddress; /* cookie0 start addr */ 1542 1543 /* adjust cookie addr/len if we are not on cookie boundary */ 1544 off -= win_p->win_offset; /* offset within window */ 1545 for (; off >= loop_cp->dmac_size; loop_cp++) 1546 off -= loop_cp->dmac_size; /* offset within cookie */ 1547 1548 mp->dmai_cookie = loop_cp + 1; 1549 win_p->win_curseg = loop_cp - cp; 1550 cp = (ddi_dma_cookie_t *)objp; 1551 MAKE_DMA_COOKIE(cp, loop_cp->dmac_laddress + off, 1552 loop_cp->dmac_size - off); 1553 1554 DEBUG2(DBG_DMA_CTL, dip, 1555 "HTOC: cookie - dmac_laddress=%p dmac_size=%x\n", 1556 cp->dmac_laddress, cp->dmac_size); 1557 } 1558 return (DDI_SUCCESS); 1559 1560 case DDI_DMA_REPWIN: 1561 *offp = mp->dmai_offset; 1562 *lenp = mp->dmai_size; 1563 return (DDI_SUCCESS); 1564 1565 case DDI_DMA_MOVWIN: { 1566 off_t off = *offp; 1567 ddi_dma_cookie_t *cp; 1568 pci_dma_win_t *win_p = mp->dmai_winlst; 1569 1570 if (off >= mp->dmai_object.dmao_size) 1571 return (DDI_FAILURE); 1572 1573 /* locate window */ 1574 while (win_p->win_offset + win_p->win_size <= off) 1575 win_p = win_p->win_next; 1576 1577 cp = (ddi_dma_cookie_t *)(win_p + 1); 1578 mp->dmai_offset = win_p->win_offset; 1579 mp->dmai_size = win_p->win_size; 1580 mp->dmai_mapping = cp->dmac_laddress; /* cookie0 star addr */ 1581 mp->dmai_cookie = cp + 1; 1582 win_p->win_curseg = 0; 1583 1584 *(ddi_dma_cookie_t *)objp = *cp; 1585 *offp = win_p->win_offset; 1586 *lenp = win_p->win_size; 1587 DEBUG2(DBG_DMA_CTL, dip, 1588 "HTOC: cookie - dmac_laddress=%p dmac_size=%x\n", 1589 cp->dmac_laddress, cp->dmac_size); 1590 } 1591 return (DDI_SUCCESS); 1592 1593 case DDI_DMA_NEXTWIN: { 1594 pci_dma_win_t *win_p = *(pci_dma_win_t **)offp; 1595 pci_dma_win_t **nw_pp = (pci_dma_win_t **)objp; 1596 ddi_dma_cookie_t *cp; 1597 if (!win_p) { 1598 *nw_pp = mp->dmai_winlst; 1599 return (DDI_SUCCESS); 1600 } 1601 1602 if (win_p->win_offset != mp->dmai_offset) 1603 return (DDI_DMA_STALE); 1604 if (!win_p->win_next) 1605 return (DDI_DMA_DONE); 1606 win_p = win_p->win_next; 1607 cp = (ddi_dma_cookie_t *)(win_p + 1); 1608 mp->dmai_offset = win_p->win_offset; 1609 mp->dmai_size = win_p->win_size; 1610 mp->dmai_mapping = cp->dmac_laddress; /* cookie0 star addr */ 1611 mp->dmai_cookie = cp + 1; 1612 win_p->win_curseg = 0; 1613 *nw_pp = win_p; 1614 } 1615 return (DDI_SUCCESS); 1616 1617 case DDI_DMA_NEXTSEG: { 1618 pci_dma_win_t *w_p = *(pci_dma_win_t **)offp; 1619 if (w_p->win_offset != mp->dmai_offset) 1620 return (DDI_DMA_STALE); 1621 if (w_p->win_curseg + 1 >= w_p->win_ncookies) 1622 return (DDI_DMA_DONE); 1623 w_p->win_curseg++; 1624 } 1625 *(ddi_dma_seg_t *)objp = (ddi_dma_seg_t)mp; 1626 return (DDI_SUCCESS); 1627 1628 case DDI_DMA_SEGTOC: { 1629 pci_dma_win_t *win_p = mp->dmai_winlst; 1630 off_t off = mp->dmai_offset; 1631 ddi_dma_cookie_t *cp; 1632 int i; 1633 1634 /* locate active window */ 1635 for (; win_p->win_offset != off; win_p = win_p->win_next); 1636 cp = (ddi_dma_cookie_t *)(win_p + 1); 1637 for (i = 0; i < win_p->win_curseg; i++, cp++) 1638 off += cp->dmac_size; 1639 *offp = off; 1640 *lenp = cp->dmac_size; 1641 *(ddi_dma_cookie_t *)objp = *cp; /* copy cookie */ 1642 } 1643 return (DDI_SUCCESS); 1644 1645 case DDI_DMA_COFF: { 1646 pci_dma_win_t *win_p; 1647 ddi_dma_cookie_t *cp; 1648 uint64_t addr, key = ((ddi_dma_cookie_t *)offp)->dmac_laddress; 1649 size_t win_off; 1650 1651 for (win_p = mp->dmai_winlst; win_p; win_p = win_p->win_next) { 1652 int i; 1653 win_off = 0; 1654 cp = (ddi_dma_cookie_t *)(win_p + 1); 1655 for (i = 0; i < win_p->win_ncookies; i++, cp++) { 1656 size_t sz = cp->dmac_size; 1657 1658 addr = cp->dmac_laddress; 1659 if ((addr <= key) && (addr + sz >= key)) 1660 goto found; 1661 win_off += sz; 1662 } 1663 } 1664 return (DDI_FAILURE); 1665 found: 1666 *objp = (caddr_t)(win_p->win_offset + win_off + (key - addr)); 1667 return (DDI_SUCCESS); 1668 } 1669 1670 case DDI_DMA_REMAP: 1671 return (DDI_FAILURE); 1672 1673 default: 1674 DEBUG3(DBG_DMA_CTL, dip, "unknown command (%x): rdip=%s%d\n", 1675 cmd, ddi_driver_name(rdip), ddi_get_instance(rdip)); 1676 break; 1677 } 1678 return (DDI_FAILURE); 1679 } 1680 1681 static void 1682 pci_dvma_debug_init(iommu_t *iommu_p) 1683 { 1684 size_t sz = sizeof (struct dvma_rec) * pci_dvma_debug_rec; 1685 ASSERT(MUTEX_HELD(&iommu_p->dvma_debug_lock)); 1686 cmn_err(CE_NOTE, "PCI DVMA %p stat ON", iommu_p); 1687 1688 iommu_p->dvma_alloc_rec = kmem_zalloc(sz, KM_SLEEP); 1689 iommu_p->dvma_free_rec = kmem_zalloc(sz, KM_SLEEP); 1690 1691 iommu_p->dvma_active_list = NULL; 1692 iommu_p->dvma_alloc_rec_index = 0; 1693 iommu_p->dvma_free_rec_index = 0; 1694 iommu_p->dvma_active_count = 0; 1695 } 1696 1697 void 1698 pci_dvma_debug_fini(iommu_t *iommu_p) 1699 { 1700 struct dvma_rec *prev, *ptr; 1701 size_t sz = sizeof (struct dvma_rec) * pci_dvma_debug_rec; 1702 uint64_t mask = ~(1ull << iommu_p->iommu_inst); 1703 cmn_err(CE_NOTE, "PCI DVMA %p stat OFF", iommu_p); 1704 1705 kmem_free(iommu_p->dvma_alloc_rec, sz); 1706 kmem_free(iommu_p->dvma_free_rec, sz); 1707 iommu_p->dvma_alloc_rec = iommu_p->dvma_free_rec = NULL; 1708 1709 prev = iommu_p->dvma_active_list; 1710 if (!prev) 1711 return; 1712 for (ptr = prev->next; ptr; prev = ptr, ptr = ptr->next) 1713 kmem_free(prev, sizeof (struct dvma_rec)); 1714 kmem_free(prev, sizeof (struct dvma_rec)); 1715 1716 iommu_p->dvma_active_list = NULL; 1717 iommu_p->dvma_alloc_rec_index = 0; 1718 iommu_p->dvma_free_rec_index = 0; 1719 iommu_p->dvma_active_count = 0; 1720 1721 pci_dvma_debug_on &= mask; 1722 pci_dvma_debug_off &= mask; 1723 } 1724 1725 void 1726 pci_dvma_alloc_debug(iommu_t *iommu_p, char *address, uint_t len, 1727 ddi_dma_impl_t *mp) 1728 { 1729 struct dvma_rec *ptr; 1730 mutex_enter(&iommu_p->dvma_debug_lock); 1731 1732 if (!iommu_p->dvma_alloc_rec) 1733 pci_dvma_debug_init(iommu_p); 1734 if (DVMA_DBG_OFF(iommu_p)) { 1735 pci_dvma_debug_fini(iommu_p); 1736 goto done; 1737 } 1738 1739 ptr = &iommu_p->dvma_alloc_rec[iommu_p->dvma_alloc_rec_index]; 1740 ptr->dvma_addr = address; 1741 ptr->len = len; 1742 ptr->mp = mp; 1743 if (++iommu_p->dvma_alloc_rec_index == pci_dvma_debug_rec) 1744 iommu_p->dvma_alloc_rec_index = 0; 1745 1746 ptr = kmem_alloc(sizeof (struct dvma_rec), KM_SLEEP); 1747 ptr->dvma_addr = address; 1748 ptr->len = len; 1749 ptr->mp = mp; 1750 1751 ptr->next = iommu_p->dvma_active_list; 1752 iommu_p->dvma_active_list = ptr; 1753 iommu_p->dvma_active_count++; 1754 done: 1755 mutex_exit(&iommu_p->dvma_debug_lock); 1756 } 1757 1758 void 1759 pci_dvma_free_debug(iommu_t *iommu_p, char *address, uint_t len, 1760 ddi_dma_impl_t *mp) 1761 { 1762 struct dvma_rec *ptr, *ptr_save; 1763 mutex_enter(&iommu_p->dvma_debug_lock); 1764 1765 if (!iommu_p->dvma_alloc_rec) 1766 pci_dvma_debug_init(iommu_p); 1767 if (DVMA_DBG_OFF(iommu_p)) { 1768 pci_dvma_debug_fini(iommu_p); 1769 goto done; 1770 } 1771 1772 ptr = &iommu_p->dvma_free_rec[iommu_p->dvma_free_rec_index]; 1773 ptr->dvma_addr = address; 1774 ptr->len = len; 1775 ptr->mp = mp; 1776 if (++iommu_p->dvma_free_rec_index == pci_dvma_debug_rec) 1777 iommu_p->dvma_free_rec_index = 0; 1778 1779 ptr_save = iommu_p->dvma_active_list; 1780 for (ptr = ptr_save; ptr; ptr = ptr->next) { 1781 if ((ptr->dvma_addr == address) && (ptr->len = len)) 1782 break; 1783 ptr_save = ptr; 1784 } 1785 if (!ptr) { 1786 cmn_err(CE_WARN, "bad dvma free addr=%lx len=%x", 1787 (long)address, len); 1788 goto done; 1789 } 1790 if (ptr == iommu_p->dvma_active_list) 1791 iommu_p->dvma_active_list = ptr->next; 1792 else 1793 ptr_save->next = ptr->next; 1794 kmem_free(ptr, sizeof (struct dvma_rec)); 1795 iommu_p->dvma_active_count--; 1796 done: 1797 mutex_exit(&iommu_p->dvma_debug_lock); 1798 } 1799 1800 #ifdef DEBUG 1801 void 1802 dump_dma_handle(uint64_t flag, dev_info_t *dip, ddi_dma_impl_t *hp) 1803 { 1804 DEBUG4(flag, dip, "mp(%p): flags=%x mapping=%lx xfer_size=%x\n", 1805 hp, hp->dmai_inuse, hp->dmai_mapping, hp->dmai_size); 1806 DEBUG4(flag|DBG_CONT, dip, "\tnpages=%x roffset=%x rflags=%x nwin=%x\n", 1807 hp->dmai_ndvmapages, hp->dmai_roffset, hp->dmai_rflags, 1808 hp->dmai_nwin); 1809 DEBUG4(flag|DBG_CONT, dip, "\twinsize=%x tte=%p pfnlst=%p pfn0=%p\n", 1810 hp->dmai_winsize, hp->dmai_tte, hp->dmai_pfnlst, hp->dmai_pfn0); 1811 DEBUG4(flag|DBG_CONT, dip, "\twinlst=%x obj=%p attr=%p ckp=%p\n", 1812 hp->dmai_winlst, &hp->dmai_object, &hp->dmai_attr, 1813 hp->dmai_cookie); 1814 } 1815 #endif 1816 1817 void 1818 pci_vmem_do_free(iommu_t *iommu_p, void *base_addr, size_t npages, 1819 int vmemcache) 1820 { 1821 vmem_t *map_p = iommu_p->iommu_dvma_map; 1822 1823 if (vmemcache) { 1824 vmem_free(map_p, base_addr, IOMMU_PAGE_SIZE); 1825 #ifdef PCI_DMA_PROF 1826 pci_dvma_vmem_free++; 1827 #endif 1828 return; 1829 } 1830 1831 vmem_xfree(map_p, base_addr, IOMMU_PTOB(npages)); 1832 #ifdef PCI_DMA_PROF 1833 pci_dvma_vmem_xfree++; 1834 #endif 1835 } 1836
Indexes created Sun Nov 22 02:52:53 UTC 2009
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