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 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * PCI Express nexus DVMA and DMA core routines: 28 * dma_map/dma_bind_handle implementation 29 * bypass and peer-to-peer support 30 * fast track DVMA space allocation 31 * runtime DVMA debug 32 */ 33 #include <sys/types.h> 34 #include <sys/kmem.h> 35 #include <sys/async.h> 36 #include <sys/sysmacros.h> 37 #include <sys/sunddi.h> 38 #include <sys/ddi_impldefs.h> 39 #include "px_obj.h" 40 41 /*LINTLIBRARY*/ 42 43 /* 44 * px_dma_allocmp - Allocate a pci dma implementation structure 45 * 46 * An extra ddi_dma_attr structure is bundled with the usual ddi_dma_impl 47 * to hold unmodified device limits. The ddi_dma_attr inside the 48 * ddi_dma_impl structure is augumented with system limits to enhance 49 * DVMA performance at runtime. The unaugumented device limits saved 50 * right after (accessed through (ddi_dma_attr_t *)(mp + 1)) is used 51 * strictly for peer-to-peer transfers which do not obey system limits. 52 * 53 * return: DDI_SUCCESS DDI_DMA_NORESOURCES 54 */ 55 ddi_dma_impl_t * 56 px_dma_allocmp(dev_info_t *dip, dev_info_t *rdip, int (*waitfp)(caddr_t), 57 caddr_t arg) 58 { 59 register ddi_dma_impl_t *mp; 60 int sleep = (waitfp == DDI_DMA_SLEEP) ? KM_SLEEP : KM_NOSLEEP; 61 62 /* Caution: we don't use zalloc to enhance performance! */ 63 if ((mp = kmem_alloc(sizeof (px_dma_hdl_t), sleep)) == 0) { 64 DBG(DBG_DMA_MAP, dip, "can't alloc dma_handle\n"); 65 if (waitfp != DDI_DMA_DONTWAIT) { 66 DBG(DBG_DMA_MAP, dip, "alloc_mp kmem cb\n"); 67 ddi_set_callback(waitfp, arg, &px_kmem_clid); 68 } 69 return (mp); 70 } 71 72 mp->dmai_rdip = rdip; 73 mp->dmai_flags = 0; 74 mp->dmai_pfnlst = NULL; 75 mp->dmai_winlst = NULL; 76 77 /* 78 * kmem_alloc debug: the following fields are not zero-ed 79 * mp->dmai_mapping = 0; 80 * mp->dmai_size = 0; 81 * mp->dmai_offset = 0; 82 * mp->dmai_minxfer = 0; 83 * mp->dmai_burstsizes = 0; 84 * mp->dmai_ndvmapages = 0; 85 * mp->dmai_pool/roffset = 0; 86 * mp->dmai_rflags = 0; 87 * mp->dmai_inuse/flags 88 * mp->dmai_nwin = 0; 89 * mp->dmai_winsize = 0; 90 * mp->dmai_nexus_private/tte = 0; 91 * mp->dmai_iopte/pfnlst 92 * mp->dmai_sbi/pfn0 = 0; 93 * mp->dmai_minfo/winlst/fdvma 94 * mp->dmai_rdip 95 * bzero(&mp->dmai_object, sizeof (ddi_dma_obj_t)); 96 * bzero(&mp->dmai_attr, sizeof (ddi_dma_attr_t)); 97 * mp->dmai_cookie = 0; 98 */ 99 100 mp->dmai_attr.dma_attr_version = (uint_t)DMA_ATTR_VERSION; 101 mp->dmai_attr.dma_attr_flags = (uint_t)0; 102 mp->dmai_fault = 0; 103 mp->dmai_fault_check = NULL; 104 mp->dmai_fault_notify = NULL; 105 106 mp->dmai_error.err_ena = 0; 107 mp->dmai_error.err_status = DDI_FM_OK; 108 mp->dmai_error.err_expected = DDI_FM_ERR_UNEXPECTED; 109 mp->dmai_error.err_ontrap = NULL; 110 mp->dmai_error.err_fep = NULL; 111 mp->dmai_error.err_cf = NULL; 112 113 /* 114 * The bdf protection value is set to immediate child 115 * at first. It gets modified by switch/bridge drivers 116 * as the code traverses down the fabric topology. 117 * 118 * XXX No IOMMU protection for broken devices. 119 */ 120 ASSERT((intptr_t)ddi_get_parent_data(rdip) >> 1 == 0); 121 mp->dmai_bdf = ((intptr_t)ddi_get_parent_data(rdip) == 1) ? 0 : 122 pcie_get_bdf_for_dma_xfer(dip, rdip); 123 124 return (mp); 125 } 126 127 void 128 px_dma_freemp(ddi_dma_impl_t *mp) 129 { 130 if (mp->dmai_ndvmapages > 1) 131 px_dma_freepfn(mp); 132 if (mp->dmai_winlst) 133 px_dma_freewin(mp); 134 kmem_free(mp, sizeof (px_dma_hdl_t)); 135 } 136 137 void 138 px_dma_freepfn(ddi_dma_impl_t *mp) 139 { 140 void *addr = mp->dmai_pfnlst; 141 if (addr) { 142 size_t npages = mp->dmai_ndvmapages; 143 if (npages > 1) 144 kmem_free(addr, npages * sizeof (px_iopfn_t)); 145 mp->dmai_pfnlst = NULL; 146 } 147 mp->dmai_ndvmapages = 0; 148 } 149 150 /* 151 * px_dma_lmts2hdl - alloate a ddi_dma_impl_t, validate practical limits 152 * and convert dmareq->dmar_limits to mp->dmai_attr 153 * 154 * ddi_dma_impl_t member modified input 155 * ------------------------------------------------------------------------ 156 * mp->dmai_minxfer - dev 157 * mp->dmai_burstsizes - dev 158 * mp->dmai_flags - no limit? peer-to-peer only? 159 * 160 * ddi_dma_attr member modified input 161 * ------------------------------------------------------------------------ 162 * mp->dmai_attr.dma_attr_addr_lo - dev lo, sys lo 163 * mp->dmai_attr.dma_attr_addr_hi - dev hi, sys hi 164 * mp->dmai_attr.dma_attr_count_max - dev count max, dev/sys lo/hi delta 165 * mp->dmai_attr.dma_attr_seg - 0 (no nocross restriction) 166 * mp->dmai_attr.dma_attr_align - 1 (no alignment restriction) 167 * 168 * The dlim_dmaspeed member of dmareq->dmar_limits is ignored. 169 */ 170 ddi_dma_impl_t * 171 px_dma_lmts2hdl(dev_info_t *dip, dev_info_t *rdip, px_mmu_t *mmu_p, 172 ddi_dma_req_t *dmareq) 173 { 174 ddi_dma_impl_t *mp; 175 ddi_dma_attr_t *attr_p; 176 uint64_t syslo = mmu_p->mmu_dvma_base; 177 uint64_t syshi = mmu_p->mmu_dvma_end; 178 uint64_t fasthi = mmu_p->mmu_dvma_fast_end; 179 ddi_dma_lim_t *lim_p = dmareq->dmar_limits; 180 uint32_t count_max = lim_p->dlim_cntr_max; 181 uint64_t lo = lim_p->dlim_addr_lo; 182 uint64_t hi = lim_p->dlim_addr_hi; 183 if (hi <= lo) { 184 DBG(DBG_DMA_MAP, dip, "Bad limits\n"); 185 return ((ddi_dma_impl_t *)DDI_DMA_NOMAPPING); 186 } 187 if (!count_max) 188 count_max--; 189 190 if (!(mp = px_dma_allocmp(dip, rdip, dmareq->dmar_fp, 191 dmareq->dmar_arg))) 192 return (NULL); 193 194 /* store original dev input at the 2nd ddi_dma_attr */ 195 attr_p = PX_DEV_ATTR(mp); 196 SET_DMAATTR(attr_p, lo, hi, -1, count_max); 197 SET_DMAALIGN(attr_p, 1); 198 199 lo = MAX(lo, syslo); 200 hi = MIN(hi, syshi); 201 if (hi <= lo) 202 mp->dmai_flags |= PX_DMAI_FLAGS_PEER_ONLY; 203 count_max = MIN(count_max, hi - lo); 204 205 if (PX_DEV_NOSYSLIMIT(lo, hi, syslo, fasthi, 1)) 206 mp->dmai_flags |= PX_DMAI_FLAGS_NOFASTLIMIT | 207 PX_DMAI_FLAGS_NOSYSLIMIT; 208 else { 209 if (PX_DEV_NOFASTLIMIT(lo, hi, syslo, syshi, 1)) 210 mp->dmai_flags |= PX_DMAI_FLAGS_NOFASTLIMIT; 211 } 212 if (PX_DMA_NOCTX(rdip)) 213 mp->dmai_flags |= PX_DMAI_FLAGS_NOCTX; 214 215 /* store augumented dev input to mp->dmai_attr */ 216 mp->dmai_burstsizes = lim_p->dlim_burstsizes; 217 attr_p = &mp->dmai_attr; 218 SET_DMAATTR(attr_p, lo, hi, -1, count_max); 219 SET_DMAALIGN(attr_p, 1); 220 return (mp); 221 } 222 223 /* 224 * Called from px_attach to check for bypass dma support and set 225 * flags accordingly. 226 */ 227 int 228 px_dma_attach(px_t *px_p) 229 { 230 uint64_t baddr; 231 232 if (px_lib_iommu_getbypass(px_p->px_dip, 0ull, 233 PCI_MAP_ATTR_WRITE|PCI_MAP_ATTR_READ, 234 &baddr) != DDI_ENOTSUP) 235 /* ignore all other errors */ 236 px_p->px_dev_caps |= PX_BYPASS_DMA_ALLOWED; 237 238 px_p->px_dma_sync_opt = ddi_prop_get_int(DDI_DEV_T_ANY, 239 px_p->px_dip, DDI_PROP_DONTPASS, "dma-sync-options", 0); 240 241 if (px_p->px_dma_sync_opt != 0) 242 px_p->px_dev_caps |= PX_DMA_SYNC_REQUIRED; 243 244 return (DDI_SUCCESS); 245 } 246 247 /* 248 * px_dma_attr2hdl 249 * 250 * This routine is called from the alloc handle entry point to sanity check the 251 * dma attribute structure. 252 * 253 * use by: px_dma_allochdl() 254 * 255 * return value: 256 * 257 * DDI_SUCCESS - on success 258 * DDI_DMA_BADATTR - attribute has invalid version number 259 * or address limits exclude dvma space 260 */ 261 int 262 px_dma_attr2hdl(px_t *px_p, ddi_dma_impl_t *mp) 263 { 264 px_mmu_t *mmu_p = px_p->px_mmu_p; 265 uint64_t syslo, syshi; 266 int ret; 267 ddi_dma_attr_t *attrp = PX_DEV_ATTR(mp); 268 uint64_t hi = attrp->dma_attr_addr_hi; 269 uint64_t lo = attrp->dma_attr_addr_lo; 270 uint64_t align = attrp->dma_attr_align; 271 uint64_t nocross = attrp->dma_attr_seg; 272 uint64_t count_max = attrp->dma_attr_count_max; 273 274 DBG(DBG_DMA_ALLOCH, px_p->px_dip, "attrp=%p cntr_max=%x.%08x\n", 275 attrp, HI32(count_max), LO32(count_max)); 276 DBG(DBG_DMA_ALLOCH, px_p->px_dip, "hi=%x.%08x lo=%x.%08x\n", 277 HI32(hi), LO32(hi), HI32(lo), LO32(lo)); 278 DBG(DBG_DMA_ALLOCH, px_p->px_dip, "seg=%x.%08x align=%x.%08x\n", 279 HI32(nocross), LO32(nocross), HI32(align), LO32(align)); 280 281 if (!nocross) 282 nocross--; 283 if (attrp->dma_attr_flags & DDI_DMA_FORCE_PHYSICAL) { /* BYPASS */ 284 285 DBG(DBG_DMA_ALLOCH, px_p->px_dip, "bypass mode\n"); 286 /* 287 * If Bypass DMA is not supported, return error so that 288 * target driver can fall back to dvma mode of operation 289 */ 290 if (!(px_p->px_dev_caps & PX_BYPASS_DMA_ALLOWED)) 291 return (DDI_DMA_BADATTR); 292 mp->dmai_flags |= PX_DMAI_FLAGS_BYPASSREQ; 293 if (nocross != UINT64_MAX) 294 return (DDI_DMA_BADATTR); 295 if (align && (align > MMU_PAGE_SIZE)) 296 return (DDI_DMA_BADATTR); 297 align = 1; /* align on 1 page boundary */ 298 299 /* do a range check and get the limits */ 300 ret = px_lib_dma_bypass_rngchk(px_p->px_dip, attrp, 301 &syslo, &syshi); 302 if (ret != DDI_SUCCESS) 303 return (ret); 304 } else { /* MMU_XLATE or PEER_TO_PEER */ 305 align = MAX(align, MMU_PAGE_SIZE) - 1; 306 if ((align & nocross) != align) { 307 dev_info_t *rdip = mp->dmai_rdip; 308 cmn_err(CE_WARN, "%s%d dma_attr_seg not aligned", 309 NAMEINST(rdip)); 310 return (DDI_DMA_BADATTR); 311 } 312 align = MMU_BTOP(align + 1); 313 syslo = mmu_p->mmu_dvma_base; 314 syshi = mmu_p->mmu_dvma_end; 315 } 316 if (hi <= lo) { 317 dev_info_t *rdip = mp->dmai_rdip; 318 cmn_err(CE_WARN, "%s%d limits out of range", NAMEINST(rdip)); 319 return (DDI_DMA_BADATTR); 320 } 321 lo = MAX(lo, syslo); 322 hi = MIN(hi, syshi); 323 if (!count_max) 324 count_max--; 325 326 DBG(DBG_DMA_ALLOCH, px_p->px_dip, "hi=%x.%08x, lo=%x.%08x\n", 327 HI32(hi), LO32(hi), HI32(lo), LO32(lo)); 328 if (hi <= lo) { 329 /* 330 * If this is an IOMMU bypass access, the caller can't use 331 * the required addresses, so fail it. Otherwise, it's 332 * peer-to-peer; ensure that the caller has no alignment or 333 * segment size restrictions. 334 */ 335 if ((mp->dmai_flags & PX_DMAI_FLAGS_BYPASSREQ) || 336 (nocross < UINT32_MAX) || (align > 1)) 337 return (DDI_DMA_BADATTR); 338 339 mp->dmai_flags |= PX_DMAI_FLAGS_PEER_ONLY; 340 } else /* set practical counter_max value */ 341 count_max = MIN(count_max, hi - lo); 342 343 if (PX_DEV_NOSYSLIMIT(lo, hi, syslo, syshi, align)) 344 mp->dmai_flags |= PX_DMAI_FLAGS_NOSYSLIMIT | 345 PX_DMAI_FLAGS_NOFASTLIMIT; 346 else { 347 syshi = mmu_p->mmu_dvma_fast_end; 348 if (PX_DEV_NOFASTLIMIT(lo, hi, syslo, syshi, align)) 349 mp->dmai_flags |= PX_DMAI_FLAGS_NOFASTLIMIT; 350 } 351 if (PX_DMA_NOCTX(mp->dmai_rdip)) 352 mp->dmai_flags |= PX_DMAI_FLAGS_NOCTX; 353 354 mp->dmai_burstsizes = attrp->dma_attr_burstsizes; 355 attrp = &mp->dmai_attr; 356 SET_DMAATTR(attrp, lo, hi, nocross, count_max); 357 return (DDI_SUCCESS); 358 } 359 360 #define TGT_PFN_INBETWEEN(pfn, bgn, end) ((pfn >= bgn) && (pfn <= end)) 361 362 /* 363 * px_dma_type - determine which of the three types DMA (peer-to-peer, 364 * mmu bypass, or mmu translate) we are asked to do. 365 * Also checks pfn0 and rejects any non-peer-to-peer 366 * requests for peer-only devices. 367 * 368 * return values: 369 * DDI_DMA_NOMAPPING - can't get valid pfn0, or bad dma type 370 * DDI_SUCCESS 371 * 372 * dma handle members affected (set on exit): 373 * mp->dmai_object - dmareq->dmar_object 374 * mp->dmai_rflags - consistent?, nosync?, dmareq->dmar_flags 375 * mp->dmai_flags - DMA type 376 * mp->dmai_pfn0 - 1st page pfn (if va/size pair and not shadow) 377 * mp->dmai_roffset - initialized to starting MMU page offset 378 * mp->dmai_ndvmapages - # of total MMU pages of entire object 379 */ 380 int 381 px_dma_type(px_t *px_p, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp) 382 { 383 dev_info_t *dip = px_p->px_dip; 384 ddi_dma_obj_t *dobj_p = &dmareq->dmar_object; 385 px_pec_t *pec_p = px_p->px_pec_p; 386 uint32_t offset; 387 pfn_t pfn0; 388 uint_t redzone; 389 390 mp->dmai_rflags = dmareq->dmar_flags & DMP_DDIFLAGS; 391 392 if (!(px_p->px_dev_caps & PX_DMA_SYNC_REQUIRED)) 393 mp->dmai_rflags |= DMP_NOSYNC; 394 395 switch (dobj_p->dmao_type) { 396 case DMA_OTYP_BUFVADDR: 397 case DMA_OTYP_VADDR: { 398 page_t **pplist = dobj_p->dmao_obj.virt_obj.v_priv; 399 caddr_t vaddr = dobj_p->dmao_obj.virt_obj.v_addr; 400 401 DBG(DBG_DMA_MAP, dip, "vaddr=%p pplist=%p\n", vaddr, pplist); 402 offset = (ulong_t)vaddr & MMU_PAGE_OFFSET; 403 if (pplist) { /* shadow list */ 404 mp->dmai_flags |= PX_DMAI_FLAGS_PGPFN; 405 pfn0 = page_pptonum(*pplist); 406 } else { 407 struct as *as_p = dobj_p->dmao_obj.virt_obj.v_as; 408 struct hat *hat_p = as_p ? as_p->a_hat : kas.a_hat; 409 pfn0 = hat_getpfnum(hat_p, vaddr); 410 } 411 } 412 break; 413 414 case DMA_OTYP_PAGES: 415 offset = dobj_p->dmao_obj.pp_obj.pp_offset; 416 mp->dmai_flags |= PX_DMAI_FLAGS_PGPFN; 417 pfn0 = page_pptonum(dobj_p->dmao_obj.pp_obj.pp_pp); 418 break; 419 420 case DMA_OTYP_PADDR: 421 default: 422 cmn_err(CE_WARN, "%s%d requested unsupported dma type %x", 423 NAMEINST(mp->dmai_rdip), dobj_p->dmao_type); 424 return (DDI_DMA_NOMAPPING); 425 } 426 if (pfn0 == PFN_INVALID) { 427 cmn_err(CE_WARN, "%s%d: invalid pfn0 for DMA object %p", 428 NAMEINST(dip), dobj_p); 429 return (DDI_DMA_NOMAPPING); 430 } 431 if (TGT_PFN_INBETWEEN(pfn0, pec_p->pec_base32_pfn, 432 pec_p->pec_last32_pfn)) { 433 mp->dmai_flags |= PX_DMAI_FLAGS_PTP|PX_DMAI_FLAGS_PTP32; 434 goto done; /* leave bypass and dvma flag as 0 */ 435 } else if (TGT_PFN_INBETWEEN(pfn0, pec_p->pec_base64_pfn, 436 pec_p->pec_last64_pfn)) { 437 mp->dmai_flags |= PX_DMAI_FLAGS_PTP|PX_DMAI_FLAGS_PTP64; 438 goto done; /* leave bypass and dvma flag as 0 */ 439 } 440 if (PX_DMA_ISPEERONLY(mp)) { 441 dev_info_t *rdip = mp->dmai_rdip; 442 cmn_err(CE_WARN, "Bad peer-to-peer req %s%d", NAMEINST(rdip)); 443 return (DDI_DMA_NOMAPPING); 444 } 445 446 redzone = (mp->dmai_rflags & DDI_DMA_REDZONE) || 447 (mp->dmai_flags & PX_DMAI_FLAGS_MAP_BUFZONE) ? 448 PX_DMAI_FLAGS_REDZONE : 0; 449 450 mp->dmai_flags |= (mp->dmai_flags & PX_DMAI_FLAGS_BYPASSREQ) ? 451 PX_DMAI_FLAGS_BYPASS : (PX_DMAI_FLAGS_DVMA | redzone); 452 done: 453 mp->dmai_object = *dobj_p; /* whole object */ 454 mp->dmai_pfn0 = (void *)pfn0; /* cache pfn0 */ 455 mp->dmai_roffset = offset; /* win0 pg0 offset */ 456 mp->dmai_ndvmapages = MMU_BTOPR(offset + mp->dmai_object.dmao_size); 457 return (DDI_SUCCESS); 458 } 459 460 /* 461 * px_dma_pgpfn - set up pfnlst array according to pages 462 * VA/size pair: <shadow IO, bypass, peer-to-peer>, or OTYP_PAGES 463 */ 464 /*ARGSUSED*/ 465 static int 466 px_dma_pgpfn(px_t *px_p, ddi_dma_impl_t *mp, uint_t npages) 467 { 468 int i; 469 dev_info_t *dip = px_p->px_dip; 470 471 switch (mp->dmai_object.dmao_type) { 472 case DMA_OTYP_BUFVADDR: 473 case DMA_OTYP_VADDR: { 474 page_t **pplist = mp->dmai_object.dmao_obj.virt_obj.v_priv; 475 DBG(DBG_DMA_MAP, dip, "shadow pplist=%p, %x pages, pfns=", 476 pplist, npages); 477 for (i = 1; i < npages; i++) { 478 px_iopfn_t pfn = page_pptonum(pplist[i]); 479 PX_SET_MP_PFN1(mp, i, pfn); 480 DBG(DBG_DMA_MAP|DBG_CONT, dip, "%x ", pfn); 481 } 482 DBG(DBG_DMA_MAP|DBG_CONT, dip, "\n"); 483 } 484 break; 485 486 case DMA_OTYP_PAGES: { 487 page_t *pp = mp->dmai_object.dmao_obj.pp_obj.pp_pp->p_next; 488 DBG(DBG_DMA_MAP, dip, "pp=%p pfns=", pp); 489 for (i = 1; i < npages; i++, pp = pp->p_next) { 490 px_iopfn_t pfn = page_pptonum(pp); 491 PX_SET_MP_PFN1(mp, i, pfn); 492 DBG(DBG_DMA_MAP|DBG_CONT, dip, "%x ", pfn); 493 } 494 DBG(DBG_DMA_MAP|DBG_CONT, dip, "\n"); 495 } 496 break; 497 498 default: /* check is already done by px_dma_type */ 499 ASSERT(0); 500 break; 501 } 502 return (DDI_SUCCESS); 503 } 504 505 /* 506 * px_dma_vapfn - set up pfnlst array according to VA 507 * VA/size pair: <normal, bypass, peer-to-peer> 508 * pfn0 is skipped as it is already done. 509 * In this case, the cached pfn0 is used to fill pfnlst[0] 510 */ 511 static int 512 px_dma_vapfn(px_t *px_p, ddi_dma_impl_t *mp, uint_t npages) 513 { 514 dev_info_t *dip = px_p->px_dip; 515 int i; 516 caddr_t vaddr = (caddr_t)mp->dmai_object.dmao_obj.virt_obj.v_as; 517 struct hat *hat_p = vaddr ? ((struct as *)vaddr)->a_hat : kas.a_hat; 518 519 vaddr = mp->dmai_object.dmao_obj.virt_obj.v_addr + MMU_PAGE_SIZE; 520 for (i = 1; i < npages; i++, vaddr += MMU_PAGE_SIZE) { 521 px_iopfn_t pfn = hat_getpfnum(hat_p, vaddr); 522 if (pfn == PFN_INVALID) 523 goto err_badpfn; 524 PX_SET_MP_PFN1(mp, i, pfn); 525 DBG(DBG_DMA_BINDH, dip, "px_dma_vapfn: mp=%p pfnlst[%x]=%x\n", 526 mp, i, pfn); 527 } 528 return (DDI_SUCCESS); 529 err_badpfn: 530 cmn_err(CE_WARN, "%s%d: bad page frame vaddr=%p", NAMEINST(dip), vaddr); 531 return (DDI_DMA_NOMAPPING); 532 } 533 534 /* 535 * px_dma_pfn - Fills pfn list for all pages being DMA-ed. 536 * 537 * dependencies: 538 * mp->dmai_ndvmapages - set to total # of dma pages 539 * 540 * return value: 541 * DDI_SUCCESS 542 * DDI_DMA_NOMAPPING 543 */ 544 int 545 px_dma_pfn(px_t *px_p, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp) 546 { 547 uint32_t npages = mp->dmai_ndvmapages; 548 int (*waitfp)(caddr_t) = dmareq->dmar_fp; 549 int i, ret, peer = PX_DMA_ISPTP(mp); 550 int peer32 = PX_DMA_ISPTP32(mp); 551 dev_info_t *dip = px_p->px_dip; 552 553 px_pec_t *pec_p = px_p->px_pec_p; 554 px_iopfn_t pfn_base = peer32 ? pec_p->pec_base32_pfn : 555 pec_p->pec_base64_pfn; 556 px_iopfn_t pfn_last = peer32 ? pec_p->pec_last32_pfn : 557 pec_p->pec_last64_pfn; 558 px_iopfn_t pfn_adj = peer ? pfn_base : 0; 559 560 DBG(DBG_DMA_BINDH, dip, "px_dma_pfn: mp=%p pfn0=%x\n", 561 mp, PX_MP_PFN0(mp) - pfn_adj); 562 /* 1 page: no array alloc/fill, no mixed mode check */ 563 if (npages == 1) { 564 PX_SET_MP_PFN(mp, 0, PX_MP_PFN0(mp) - pfn_adj); 565 return (DDI_SUCCESS); 566 } 567 /* allocate pfn array */ 568 if (!(mp->dmai_pfnlst = kmem_alloc(npages * sizeof (px_iopfn_t), 569 waitfp == DDI_DMA_SLEEP ? KM_SLEEP : KM_NOSLEEP))) { 570 if (waitfp != DDI_DMA_DONTWAIT) 571 ddi_set_callback(waitfp, dmareq->dmar_arg, 572 &px_kmem_clid); 573 return (DDI_DMA_NORESOURCES); 574 } 575 /* fill pfn array */ 576 PX_SET_MP_PFN(mp, 0, PX_MP_PFN0(mp) - pfn_adj); /* pfnlst[0] */ 577 if ((ret = PX_DMA_ISPGPFN(mp) ? px_dma_pgpfn(px_p, mp, npages) : 578 px_dma_vapfn(px_p, mp, npages)) != DDI_SUCCESS) 579 goto err; 580 581 /* skip pfn0, check mixed mode and adjust peer to peer pfn */ 582 for (i = 1; i < npages; i++) { 583 px_iopfn_t pfn = PX_GET_MP_PFN1(mp, i); 584 if (peer ^ TGT_PFN_INBETWEEN(pfn, pfn_base, pfn_last)) { 585 cmn_err(CE_WARN, "%s%d mixed mode DMA %lx %lx", 586 NAMEINST(mp->dmai_rdip), PX_MP_PFN0(mp), pfn); 587 ret = DDI_DMA_NOMAPPING; /* mixed mode */ 588 goto err; 589 } 590 DBG(DBG_DMA_MAP, dip, 591 "px_dma_pfn: pfnlst[%x]=%x-%x\n", i, pfn, pfn_adj); 592 if (pfn_adj) 593 PX_SET_MP_PFN1(mp, i, pfn - pfn_adj); 594 } 595 return (DDI_SUCCESS); 596 err: 597 px_dma_freepfn(mp); 598 return (ret); 599 } 600 601 /* 602 * px_dvma_win() - trim requested DVMA size down to window size 603 * The 1st window starts from offset and ends at page-aligned boundary. 604 * From the 2nd window on, each window starts and ends at page-aligned 605 * boundary except the last window ends at wherever requested. 606 * 607 * accesses the following mp-> members: 608 * mp->dmai_attr.dma_attr_count_max 609 * mp->dmai_attr.dma_attr_seg 610 * mp->dmai_roffset - start offset of 1st window 611 * mp->dmai_rflags (redzone) 612 * mp->dmai_ndvmapages (for 1 page fast path) 613 * 614 * sets the following mp-> members: 615 * mp->dmai_size - xfer size, != winsize if 1st/last win (not fixed) 616 * mp->dmai_winsize - window size (no redzone), n * page size (fixed) 617 * mp->dmai_nwin - # of DMA windows of entire object (fixed) 618 * mp->dmai_rflags - remove partial flag if nwin == 1 (fixed) 619 * mp->dmai_winlst - NULL, window objects not used for DVMA (fixed) 620 * 621 * fixed - not changed across different DMA windows 622 */ 623 /*ARGSUSED*/ 624 int 625 px_dvma_win(px_t *px_p, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp) 626 { 627 uint32_t redzone_sz = PX_HAS_REDZONE(mp) ? MMU_PAGE_SIZE : 0; 628 size_t obj_sz = mp->dmai_object.dmao_size; 629 size_t xfer_sz; 630 ulong_t pg_off; 631 632 if ((mp->dmai_ndvmapages == 1) && !redzone_sz) { 633 mp->dmai_rflags &= ~DDI_DMA_PARTIAL; 634 mp->dmai_size = obj_sz; 635 mp->dmai_winsize = MMU_PAGE_SIZE; 636 mp->dmai_nwin = 1; 637 goto done; 638 } 639 640 pg_off = mp->dmai_roffset; 641 xfer_sz = obj_sz + redzone_sz; 642 643 /* include redzone in nocross check */ { 644 uint64_t nocross = mp->dmai_attr.dma_attr_seg; 645 if (xfer_sz + pg_off - 1 > nocross) 646 xfer_sz = nocross - pg_off + 1; 647 if (redzone_sz && (xfer_sz <= redzone_sz)) { 648 DBG(DBG_DMA_MAP, px_p->px_dip, 649 "nocross too small: " 650 "%lx(%lx)+%lx+%lx < %llx\n", 651 xfer_sz, obj_sz, pg_off, redzone_sz, nocross); 652 return (DDI_DMA_TOOBIG); 653 } 654 } 655 xfer_sz -= redzone_sz; /* restore transfer size */ 656 /* check counter max */ { 657 uint32_t count_max = mp->dmai_attr.dma_attr_count_max; 658 if (xfer_sz - 1 > count_max) 659 xfer_sz = count_max + 1; 660 } 661 if (xfer_sz >= obj_sz) { 662 mp->dmai_rflags &= ~DDI_DMA_PARTIAL; 663 mp->dmai_size = xfer_sz; 664 mp->dmai_winsize = P2ROUNDUP(xfer_sz + pg_off, MMU_PAGE_SIZE); 665 mp->dmai_nwin = 1; 666 goto done; 667 } 668 if (!(dmareq->dmar_flags & DDI_DMA_PARTIAL)) { 669 DBG(DBG_DMA_MAP, px_p->px_dip, "too big: %lx+%lx+%lx > %lx\n", 670 obj_sz, pg_off, redzone_sz, xfer_sz); 671 return (DDI_DMA_TOOBIG); 672 } 673 674 xfer_sz = MMU_PTOB(MMU_BTOP(xfer_sz + pg_off)); /* page align */ 675 mp->dmai_size = xfer_sz - pg_off; /* 1st window xferrable size */ 676 mp->dmai_winsize = xfer_sz; /* redzone not in winsize */ 677 mp->dmai_nwin = (obj_sz + pg_off + xfer_sz - 1) / xfer_sz; 678 done: 679 mp->dmai_winlst = NULL; 680 px_dump_dma_handle(DBG_DMA_MAP, px_p->px_dip, mp); 681 return (DDI_SUCCESS); 682 } 683 684 /* 685 * fast track cache entry to mmu context, inserts 3 0 bits between 686 * upper 6-bits and lower 3-bits of the 9-bit cache entry 687 */ 688 #define MMU_FCE_TO_CTX(i) (((i) << 3) | ((i) & 0x7) | 0x38) 689 690 /* 691 * px_dvma_map_fast - attempts to map fast trackable DVMA 692 */ 693 /*ARGSUSED*/ 694 int 695 px_dvma_map_fast(px_mmu_t *mmu_p, ddi_dma_impl_t *mp) 696 { 697 uint_t clustsz = px_dvma_page_cache_clustsz; 698 uint_t entries = px_dvma_page_cache_entries; 699 io_attributes_t attr = PX_GET_TTE_ATTR(mp->dmai_rflags, 700 mp->dmai_attr.dma_attr_flags); 701 int i = mmu_p->mmu_dvma_addr_scan_start; 702 uint8_t *lock_addr = mmu_p->mmu_dvma_cache_locks + i; 703 px_dvma_addr_t dvma_pg; 704 size_t npages = MMU_BTOP(mp->dmai_winsize); 705 dev_info_t *dip = mmu_p->mmu_px_p->px_dip; 706 707 extern uint8_t ldstub(uint8_t *); 708 ASSERT(MMU_PTOB(npages) == mp->dmai_winsize); 709 ASSERT(npages + PX_HAS_REDZONE(mp) <= clustsz); 710 711 for (; i < entries && ldstub(lock_addr); i++, lock_addr++) 712 ; 713 if (i >= entries) { 714 lock_addr = mmu_p->mmu_dvma_cache_locks; 715 i = 0; 716 for (; i < entries && ldstub(lock_addr); i++, lock_addr++) 717 ; 718 if (i >= entries) { 719 #ifdef PX_DMA_PROF 720 px_dvmaft_exhaust++; 721 #endif /* PX_DMA_PROF */ 722 return (DDI_DMA_NORESOURCES); 723 } 724 } 725 mmu_p->mmu_dvma_addr_scan_start = (i + 1) & (entries - 1); 726 727 i *= clustsz; 728 dvma_pg = mmu_p->dvma_base_pg + i; 729 730 if (px_lib_iommu_map(dip, PCI_TSBID(0, i), npages, 731 PX_ADD_ATTR_EXTNS(attr, mp->dmai_bdf), (void *)mp, 0, 732 MMU_MAP_PFN) != DDI_SUCCESS) { 733 DBG(DBG_MAP_WIN, dip, "px_dvma_map_fast: " 734 "px_lib_iommu_map failed\n"); 735 return (DDI_FAILURE); 736 } 737 738 if (!PX_MAP_BUFZONE(mp)) 739 goto done; 740 741 DBG(DBG_MAP_WIN, dip, "px_dvma_map_fast: redzone pg=%x\n", i + npages); 742 743 ASSERT(PX_HAS_REDZONE(mp)); 744 745 if (px_lib_iommu_map(dip, PCI_TSBID(0, i + npages), 1, 746 PX_ADD_ATTR_EXTNS(attr, mp->dmai_bdf), (void *)mp, npages - 1, 747 MMU_MAP_PFN) != DDI_SUCCESS) { 748 DBG(DBG_MAP_WIN, dip, "px_dvma_map_fast: " 749 "mapping REDZONE page failed\n"); 750 751 (void) px_lib_iommu_demap(dip, PCI_TSBID(0, i), npages); 752 return (DDI_FAILURE); 753 } 754 755 done: 756 #ifdef PX_DMA_PROF 757 px_dvmaft_success++; 758 #endif 759 mp->dmai_mapping = mp->dmai_roffset | MMU_PTOB(dvma_pg); 760 mp->dmai_offset = 0; 761 mp->dmai_flags |= PX_DMAI_FLAGS_FASTTRACK; 762 PX_SAVE_MP_TTE(mp, attr); /* save TTE template for unmapping */ 763 if (PX_DVMA_DBG_ON(mmu_p)) 764 px_dvma_alloc_debug(mmu_p, (char *)mp->dmai_mapping, 765 mp->dmai_size, mp); 766 return (DDI_SUCCESS); 767 } 768 769 /* 770 * px_dvma_map: map non-fasttrack DMA 771 * Use quantum cache if single page DMA. 772 */ 773 int 774 px_dvma_map(ddi_dma_impl_t *mp, ddi_dma_req_t *dmareq, px_mmu_t *mmu_p) 775 { 776 uint_t npages = PX_DMA_WINNPGS(mp); 777 px_dvma_addr_t dvma_pg, dvma_pg_index; 778 void *dvma_addr; 779 uint64_t tte = PX_GET_TTE_ATTR(mp->dmai_rflags, 780 mp->dmai_attr.dma_attr_flags); 781 int sleep = dmareq->dmar_fp == DDI_DMA_SLEEP ? VM_SLEEP : VM_NOSLEEP; 782 dev_info_t *dip = mp->dmai_rdip; 783 int ret = DDI_SUCCESS; 784 785 /* 786 * allocate dvma space resource and map in the first window. 787 * (vmem_t *vmp, size_t size, 788 * size_t align, size_t phase, size_t nocross, 789 * void *minaddr, void *maxaddr, int vmflag) 790 */ 791 if ((npages == 1) && !PX_HAS_REDZONE(mp) && PX_HAS_NOSYSLIMIT(mp)) { 792 dvma_addr = vmem_alloc(mmu_p->mmu_dvma_map, 793 MMU_PAGE_SIZE, sleep); 794 mp->dmai_flags |= PX_DMAI_FLAGS_VMEMCACHE; 795 #ifdef PX_DMA_PROF 796 px_dvma_vmem_alloc++; 797 #endif /* PX_DMA_PROF */ 798 } else { 799 dvma_addr = vmem_xalloc(mmu_p->mmu_dvma_map, 800 MMU_PTOB(npages + PX_HAS_REDZONE(mp)), 801 MAX(mp->dmai_attr.dma_attr_align, MMU_PAGE_SIZE), 802 0, 803 mp->dmai_attr.dma_attr_seg + 1, 804 (void *)mp->dmai_attr.dma_attr_addr_lo, 805 (void *)(mp->dmai_attr.dma_attr_addr_hi + 1), 806 sleep); 807 #ifdef PX_DMA_PROF 808 px_dvma_vmem_xalloc++; 809 #endif /* PX_DMA_PROF */ 810 } 811 dvma_pg = MMU_BTOP((ulong_t)dvma_addr); 812 dvma_pg_index = dvma_pg - mmu_p->dvma_base_pg; 813 DBG(DBG_DMA_MAP, dip, "fallback dvma_pages: dvma_pg=%x index=%x\n", 814 dvma_pg, dvma_pg_index); 815 if (dvma_pg == 0) 816 goto noresource; 817 818 mp->dmai_mapping = mp->dmai_roffset | MMU_PTOB(dvma_pg); 819 mp->dmai_offset = 0; 820 PX_SAVE_MP_TTE(mp, tte); /* mp->dmai_tte = tte */ 821 822 if ((ret = px_mmu_map_pages(mmu_p, 823 mp, dvma_pg, npages, 0)) != DDI_SUCCESS) { 824 if (mp->dmai_flags & PX_DMAI_FLAGS_VMEMCACHE) { 825 vmem_free(mmu_p->mmu_dvma_map, (void *)dvma_addr, 826 MMU_PAGE_SIZE); 827 #ifdef PX_DMA_PROF 828 px_dvma_vmem_free++; 829 #endif /* PX_DMA_PROF */ 830 } else { 831 vmem_xfree(mmu_p->mmu_dvma_map, (void *)dvma_addr, 832 MMU_PTOB(npages + PX_HAS_REDZONE(mp))); 833 #ifdef PX_DMA_PROF 834 px_dvma_vmem_xfree++; 835 #endif /* PX_DMA_PROF */ 836 } 837 } 838 839 return (ret); 840 noresource: 841 if (dmareq->dmar_fp != DDI_DMA_DONTWAIT) { 842 DBG(DBG_DMA_MAP, dip, "dvma_pg 0 - set callback\n"); 843 ddi_set_callback(dmareq->dmar_fp, dmareq->dmar_arg, 844 &mmu_p->mmu_dvma_clid); 845 } 846 DBG(DBG_DMA_MAP, dip, "vmem_xalloc - DDI_DMA_NORESOURCES\n"); 847 return (DDI_DMA_NORESOURCES); 848 } 849 850 void 851 px_dvma_unmap(px_mmu_t *mmu_p, ddi_dma_impl_t *mp) 852 { 853 px_dvma_addr_t dvma_addr = (px_dvma_addr_t)mp->dmai_mapping; 854 px_dvma_addr_t dvma_pg = MMU_BTOP(dvma_addr); 855 dvma_addr = MMU_PTOB(dvma_pg); 856 857 if (mp->dmai_flags & PX_DMAI_FLAGS_FASTTRACK) { 858 px_iopfn_t index = dvma_pg - mmu_p->dvma_base_pg; 859 ASSERT(index % px_dvma_page_cache_clustsz == 0); 860 index /= px_dvma_page_cache_clustsz; 861 ASSERT(index < px_dvma_page_cache_entries); 862 mmu_p->mmu_dvma_cache_locks[index] = 0; 863 #ifdef PX_DMA_PROF 864 px_dvmaft_free++; 865 #endif /* PX_DMA_PROF */ 866 return; 867 } 868 869 if (mp->dmai_flags & PX_DMAI_FLAGS_VMEMCACHE) { 870 vmem_free(mmu_p->mmu_dvma_map, (void *)dvma_addr, 871 MMU_PAGE_SIZE); 872 #ifdef PX_DMA_PROF 873 px_dvma_vmem_free++; 874 #endif /* PX_DMA_PROF */ 875 } else { 876 size_t npages = MMU_BTOP(mp->dmai_winsize) + PX_HAS_REDZONE(mp); 877 vmem_xfree(mmu_p->mmu_dvma_map, (void *)dvma_addr, 878 MMU_PTOB(npages)); 879 #ifdef PX_DMA_PROF 880 px_dvma_vmem_xfree++; 881 #endif /* PX_DMA_PROF */ 882 } 883 } 884 885 /* 886 * DVMA mappings may have multiple windows, but each window always have 887 * one segment. 888 */ 889 int 890 px_dvma_ctl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_impl_t *mp, 891 enum ddi_dma_ctlops cmd, off_t *offp, size_t *lenp, caddr_t *objp, 892 uint_t cache_flags) 893 { 894 switch (cmd) { 895 case DDI_DMA_SYNC: 896 return (px_lib_dma_sync(dip, rdip, (ddi_dma_handle_t)mp, 897 *offp, *lenp, cache_flags)); 898 899 case DDI_DMA_HTOC: { 900 int ret; 901 off_t wo_off, off = *offp; /* wo_off: wnd's obj offset */ 902 uint_t win_size = mp->dmai_winsize; 903 ddi_dma_cookie_t *cp = (ddi_dma_cookie_t *)objp; 904 905 if (off >= mp->dmai_object.dmao_size) { 906 cmn_err(CE_WARN, "%s%d invalid dma_htoc offset %lx", 907 NAMEINST(mp->dmai_rdip), off); 908 return (DDI_FAILURE); 909 } 910 off += mp->dmai_roffset; 911 ret = px_dma_win(dip, rdip, (ddi_dma_handle_t)mp, 912 off / win_size, &wo_off, NULL, cp, NULL); /* lenp == NULL */ 913 if (ret) 914 return (ret); 915 DBG(DBG_DMA_CTL, dip, "HTOC:cookie=%x+%lx off=%lx,%lx\n", 916 cp->dmac_address, cp->dmac_size, off, *offp); 917 918 /* adjust cookie addr/len if we are not on window boundary */ 919 ASSERT((off % win_size) == (off - 920 (PX_DMA_CURWIN(mp) ? mp->dmai_roffset : 0) - wo_off)); 921 off = PX_DMA_CURWIN(mp) ? off % win_size : *offp; 922 ASSERT(cp->dmac_size > off); 923 cp->dmac_laddress += off; 924 cp->dmac_size -= off; 925 DBG(DBG_DMA_CTL, dip, "HTOC:mp=%p cookie=%x+%lx off=%lx,%lx\n", 926 mp, cp->dmac_address, cp->dmac_size, off, wo_off); 927 } 928 return (DDI_SUCCESS); 929 930 case DDI_DMA_REPWIN: 931 *offp = mp->dmai_offset; 932 *lenp = mp->dmai_size; 933 return (DDI_SUCCESS); 934 935 case DDI_DMA_MOVWIN: { 936 off_t off = *offp; 937 if (off >= mp->dmai_object.dmao_size) 938 return (DDI_FAILURE); 939 off += mp->dmai_roffset; 940 return (px_dma_win(dip, rdip, (ddi_dma_handle_t)mp, 941 off / mp->dmai_winsize, offp, lenp, 942 (ddi_dma_cookie_t *)objp, NULL)); 943 } 944 945 case DDI_DMA_NEXTWIN: { 946 px_window_t win = PX_DMA_CURWIN(mp); 947 if (offp) { 948 if (*(px_window_t *)offp != win) { 949 /* window not active */ 950 *(px_window_t *)objp = win; /* return cur win */ 951 return (DDI_DMA_STALE); 952 } 953 win++; 954 } else /* map win 0 */ 955 win = 0; 956 if (win >= mp->dmai_nwin) { 957 *(px_window_t *)objp = win - 1; 958 return (DDI_DMA_DONE); 959 } 960 if (px_dma_win(dip, rdip, (ddi_dma_handle_t)mp, 961 win, 0, 0, 0, 0)) { 962 *(px_window_t *)objp = win - 1; 963 return (DDI_FAILURE); 964 } 965 *(px_window_t *)objp = win; 966 } 967 return (DDI_SUCCESS); 968 969 case DDI_DMA_NEXTSEG: 970 if (*(px_window_t *)offp != PX_DMA_CURWIN(mp)) 971 return (DDI_DMA_STALE); 972 if (lenp) /* only 1 seg allowed */ 973 return (DDI_DMA_DONE); 974 975 /* return mp as seg 0 */ 976 *(ddi_dma_seg_t *)objp = (ddi_dma_seg_t)mp; 977 return (DDI_SUCCESS); 978 979 case DDI_DMA_SEGTOC: 980 MAKE_DMA_COOKIE((ddi_dma_cookie_t *)objp, mp->dmai_mapping, 981 mp->dmai_size); 982 *offp = mp->dmai_offset; 983 *lenp = mp->dmai_size; 984 return (DDI_SUCCESS); 985 986 case DDI_DMA_COFF: { 987 ddi_dma_cookie_t *cp = (ddi_dma_cookie_t *)offp; 988 if (cp->dmac_address < mp->dmai_mapping || 989 (cp->dmac_address + cp->dmac_size) > 990 (mp->dmai_mapping + mp->dmai_size)) 991 return (DDI_FAILURE); 992 *objp = (caddr_t)(cp->dmac_address - mp->dmai_mapping + 993 mp->dmai_offset); 994 } 995 return (DDI_SUCCESS); 996 default: 997 DBG(DBG_DMA_CTL, dip, "unknown command (%x): rdip=%s%d\n", 998 cmd, ddi_driver_name(rdip), ddi_get_instance(rdip)); 999 break; 1000 } 1001 return (DDI_FAILURE); 1002 } 1003 1004 void 1005 px_dma_freewin(ddi_dma_impl_t *mp) 1006 { 1007 px_dma_win_t *win_p = mp->dmai_winlst, *win2_p; 1008 for (win2_p = win_p; win_p; win2_p = win_p) { 1009 win_p = win2_p->win_next; 1010 kmem_free(win2_p, sizeof (px_dma_win_t) + 1011 sizeof (ddi_dma_cookie_t) * win2_p->win_ncookies); 1012 } 1013 mp->dmai_nwin = 0; 1014 mp->dmai_winlst = NULL; 1015 } 1016 1017 /* 1018 * px_dma_newwin - create a dma window object and cookies 1019 * 1020 * After the initial scan in px_dma_physwin(), which identifies 1021 * a portion of the pfn array that belongs to a dma window, 1022 * we are called to allocate and initialize representing memory 1023 * resources. We know from the 1st scan the number of cookies 1024 * or dma segment in this window so we can allocate a contiguous 1025 * memory array for the dma cookies (The implementation of 1026 * ddi_dma_nextcookie(9f) dictates dma cookies be contiguous). 1027 * 1028 * A second round scan is done on the pfn array to identify 1029 * each dma segment and initialize its corresponding dma cookie. 1030 * We don't need to do all the safety checking and we know they 1031 * all belong to the same dma window. 1032 * 1033 * Input: cookie_no - # of cookies identified by the 1st scan 1034 * start_idx - subscript of the pfn array for the starting pfn 1035 * end_idx - subscript of the last pfn in dma window 1036 * win_pp - pointer to win_next member of previous window 1037 * Return: DDI_SUCCESS - with **win_pp as newly created window object 1038 * DDI_DMA_NORESROUCE - caller frees all previous window objs 1039 * Note: Each cookie and window size are all initialized on page 1040 * boundary. This is not true for the 1st cookie of the 1st 1041 * window and the last cookie of the last window. 1042 * We fix that later in upper layer which has access to size 1043 * and offset info. 1044 * 1045 */ 1046 /*ARGSUSED*/ 1047 static int 1048 px_dma_newwin(dev_info_t *dip, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp, 1049 uint32_t cookie_no, uint32_t start_idx, uint32_t end_idx, 1050 px_dma_win_t **win_pp, uint64_t count_max, uint64_t bypass) 1051 { 1052 int (*waitfp)(caddr_t) = dmareq->dmar_fp; 1053 ddi_dma_cookie_t *cookie_p; 1054 uint32_t pfn_no = 1; 1055 px_iopfn_t pfn = PX_GET_MP_PFN(mp, start_idx); 1056 px_iopfn_t prev_pfn = pfn; 1057 uint64_t baddr, seg_pfn0 = pfn; 1058 size_t sz = cookie_no * sizeof (ddi_dma_cookie_t); 1059 px_dma_win_t *win_p = kmem_zalloc(sizeof (px_dma_win_t) + sz, 1060 waitfp == DDI_DMA_SLEEP ? KM_SLEEP : KM_NOSLEEP); 1061 io_attributes_t attr = PX_GET_TTE_ATTR(mp->dmai_rflags, 1062 mp->dmai_attr.dma_attr_flags); 1063 1064 if (!win_p) 1065 goto noresource; 1066 1067 win_p->win_next = NULL; 1068 win_p->win_ncookies = cookie_no; 1069 win_p->win_curseg = 0; /* start from segment 0 */ 1070 win_p->win_size = MMU_PTOB(end_idx - start_idx + 1); 1071 /* win_p->win_offset is left uninitialized */ 1072 1073 cookie_p = (ddi_dma_cookie_t *)(win_p + 1); 1074 start_idx++; 1075 for (; start_idx <= end_idx; start_idx++, prev_pfn = pfn, pfn_no++) { 1076 pfn = PX_GET_MP_PFN1(mp, start_idx); 1077 if ((pfn == prev_pfn + 1) && 1078 (MMU_PTOB(pfn_no + 1) - 1 <= count_max)) 1079 continue; 1080 1081 /* close up the cookie up to (including) prev_pfn */ 1082 baddr = MMU_PTOB(seg_pfn0); 1083 if (bypass && (px_lib_iommu_getbypass(dip, 1084 baddr, attr, &baddr) != DDI_SUCCESS)) 1085 return (DDI_FAILURE); 1086 1087 MAKE_DMA_COOKIE(cookie_p, baddr, MMU_PTOB(pfn_no)); 1088 DBG(DBG_BYPASS, mp->dmai_rdip, "cookie %p (%x pages)\n", 1089 MMU_PTOB(seg_pfn0), pfn_no); 1090 1091 cookie_p++; /* advance to next available cookie cell */ 1092 pfn_no = 0; 1093 seg_pfn0 = pfn; /* start a new segment from current pfn */ 1094 } 1095 1096 baddr = MMU_PTOB(seg_pfn0); 1097 if (bypass && (px_lib_iommu_getbypass(dip, 1098 baddr, attr, &baddr) != DDI_SUCCESS)) 1099 return (DDI_FAILURE); 1100 1101 MAKE_DMA_COOKIE(cookie_p, baddr, MMU_PTOB(pfn_no)); 1102 DBG(DBG_BYPASS, mp->dmai_rdip, "cookie %p (%x pages) of total %x\n", 1103 MMU_PTOB(seg_pfn0), pfn_no, cookie_no); 1104 #ifdef DEBUG 1105 cookie_p++; 1106 ASSERT((cookie_p - (ddi_dma_cookie_t *)(win_p + 1)) == cookie_no); 1107 #endif /* DEBUG */ 1108 *win_pp = win_p; 1109 return (DDI_SUCCESS); 1110 noresource: 1111 if (waitfp != DDI_DMA_DONTWAIT) 1112 ddi_set_callback(waitfp, dmareq->dmar_arg, &px_kmem_clid); 1113 return (DDI_DMA_NORESOURCES); 1114 } 1115 1116 /* 1117 * px_dma_adjust - adjust 1st and last cookie and window sizes 1118 * remove initial dma page offset from 1st cookie and window size 1119 * remove last dma page remainder from last cookie and window size 1120 * fill win_offset of each dma window according to just fixed up 1121 * each window sizes 1122 * px_dma_win_t members modified: 1123 * win_p->win_offset - this window's offset within entire DMA object 1124 * win_p->win_size - xferrable size (in bytes) for this window 1125 * 1126 * ddi_dma_impl_t members modified: 1127 * mp->dmai_size - 1st window xferrable size 1128 * mp->dmai_offset - 0, which is the dma offset of the 1st window 1129 * 1130 * ddi_dma_cookie_t members modified: 1131 * cookie_p->dmac_size - 1st and last cookie remove offset or remainder 1132 * cookie_p->dmac_laddress - 1st cookie add page offset 1133 */ 1134 static void 1135 px_dma_adjust(ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp, px_dma_win_t *win_p) 1136 { 1137 ddi_dma_cookie_t *cookie_p = (ddi_dma_cookie_t *)(win_p + 1); 1138 size_t pg_offset = mp->dmai_roffset; 1139 size_t win_offset = 0; 1140 1141 cookie_p->dmac_size -= pg_offset; 1142 cookie_p->dmac_laddress |= pg_offset; 1143 win_p->win_size -= pg_offset; 1144 DBG(DBG_BYPASS, mp->dmai_rdip, "pg0 adjust %lx\n", pg_offset); 1145 1146 mp->dmai_size = win_p->win_size; 1147 mp->dmai_offset = 0; 1148 1149 pg_offset += mp->dmai_object.dmao_size; 1150 pg_offset &= MMU_PAGE_OFFSET; 1151 if (pg_offset) 1152 pg_offset = MMU_PAGE_SIZE - pg_offset; 1153 DBG(DBG_BYPASS, mp->dmai_rdip, "last pg adjust %lx\n", pg_offset); 1154 1155 for (; win_p->win_next; win_p = win_p->win_next) { 1156 DBG(DBG_BYPASS, mp->dmai_rdip, "win off %p\n", win_offset); 1157 win_p->win_offset = win_offset; 1158 win_offset += win_p->win_size; 1159 } 1160 /* last window */ 1161 win_p->win_offset = win_offset; 1162 cookie_p = (ddi_dma_cookie_t *)(win_p + 1); 1163 cookie_p[win_p->win_ncookies - 1].dmac_size -= pg_offset; 1164 win_p->win_size -= pg_offset; 1165 ASSERT((win_offset + win_p->win_size) == mp->dmai_object.dmao_size); 1166 } 1167 1168 /* 1169 * px_dma_physwin() - carve up dma windows using physical addresses. 1170 * Called to handle mmu bypass and pci peer-to-peer transfers. 1171 * Calls px_dma_newwin() to allocate window objects. 1172 * 1173 * Dependency: mp->dmai_pfnlst points to an array of pfns 1174 * 1175 * 1. Each dma window is represented by a px_dma_win_t object. 1176 * The object will be casted to ddi_dma_win_t and returned 1177 * to leaf driver through the DDI interface. 1178 * 2. Each dma window can have several dma segments with each 1179 * segment representing a physically contiguous either memory 1180 * space (if we are doing an mmu bypass transfer) or pci address 1181 * space (if we are doing a peer-to-peer transfer). 1182 * 3. Each segment has a DMA cookie to program the DMA engine. 1183 * The cookies within each DMA window must be located in a 1184 * contiguous array per ddi_dma_nextcookie(9f). 1185 * 4. The number of DMA segments within each DMA window cannot exceed 1186 * mp->dmai_attr.dma_attr_sgllen. If the transfer size is 1187 * too large to fit in the sgllen, the rest needs to be 1188 * relocated to the next dma window. 1189 * 5. Peer-to-peer DMA segment follows device hi, lo, count_max, 1190 * and nocross restrictions while bypass DMA follows the set of 1191 * restrictions with system limits factored in. 1192 * 1193 * Return: 1194 * mp->dmai_winlst - points to a link list of px_dma_win_t objects. 1195 * Each px_dma_win_t object on the link list contains 1196 * infomation such as its window size (# of pages), 1197 * starting offset (also see Restriction), an array of 1198 * DMA cookies, and # of cookies in the array. 1199 * mp->dmai_pfnlst - NULL, the pfn list is freed to conserve memory. 1200 * mp->dmai_nwin - # of total DMA windows on mp->dmai_winlst. 1201 * mp->dmai_mapping - starting cookie address 1202 * mp->dmai_rflags - consistent, nosync, no redzone 1203 * mp->dmai_cookie - start of cookie table of the 1st DMA window 1204 * 1205 * Restriction: 1206 * Each px_dma_win_t object can theoratically start from any offset 1207 * since the mmu is not involved. However, this implementation 1208 * always make windows start from page aligned offset (except 1209 * the 1st window, which follows the requested offset) due to the 1210 * fact that we are handed a pfn list. This does require device's 1211 * count_max and attr_seg to be at least MMU_PAGE_SIZE aligned. 1212 */ 1213 int 1214 px_dma_physwin(px_t *px_p, ddi_dma_req_t *dmareq, ddi_dma_impl_t *mp) 1215 { 1216 uint_t npages = mp->dmai_ndvmapages; 1217 int ret, sgllen = mp->dmai_attr.dma_attr_sgllen; 1218 px_iopfn_t pfn_lo, pfn_hi, prev_pfn; 1219 px_iopfn_t pfn = PX_GET_MP_PFN(mp, 0); 1220 uint32_t i, win_no = 0, pfn_no = 1, win_pfn0_index = 0, cookie_no = 0; 1221 uint64_t count_max, bypass_addr = 0; 1222 px_dma_win_t **win_pp = (px_dma_win_t **)&mp->dmai_winlst; 1223 ddi_dma_cookie_t *cookie0_p; 1224 io_attributes_t attr = PX_GET_TTE_ATTR(mp->dmai_rflags, 1225 mp->dmai_attr.dma_attr_flags); 1226 dev_info_t *dip = px_p->px_dip; 1227 1228 ASSERT(PX_DMA_ISPTP(mp) || PX_DMA_ISBYPASS(mp)); 1229 if (PX_DMA_ISPTP(mp)) { /* ignore sys limits for peer-to-peer */ 1230 ddi_dma_attr_t *dev_attr_p = PX_DEV_ATTR(mp); 1231 uint64_t nocross = dev_attr_p->dma_attr_seg; 1232 px_pec_t *pec_p = px_p->px_pec_p; 1233 px_iopfn_t pfn_last = PX_DMA_ISPTP32(mp) ? 1234 pec_p->pec_last32_pfn - pec_p->pec_base32_pfn : 1235 pec_p->pec_last64_pfn - pec_p->pec_base64_pfn; 1236 1237 if (nocross && (nocross < UINT32_MAX)) 1238 return (DDI_DMA_NOMAPPING); 1239 if (dev_attr_p->dma_attr_align > MMU_PAGE_SIZE) 1240 return (DDI_DMA_NOMAPPING); 1241 pfn_lo = MMU_BTOP(dev_attr_p->dma_attr_addr_lo); 1242 pfn_hi = MMU_BTOP(dev_attr_p->dma_attr_addr_hi); 1243 pfn_hi = MIN(pfn_hi, pfn_last); 1244 if ((pfn_lo > pfn_hi) || (pfn < pfn_lo)) 1245 return (DDI_DMA_NOMAPPING); 1246 1247 count_max = dev_attr_p->dma_attr_count_max; 1248 count_max = MIN(count_max, nocross); 1249 /* 1250 * the following count_max trim is not done because we are 1251 * making sure pfn_lo <= pfn <= pfn_hi inside the loop 1252 * count_max=MIN(count_max, MMU_PTOB(pfn_hi - pfn_lo + 1)-1); 1253 */ 1254 } else { /* bypass hi/lo/count_max have been processed by attr2hdl() */ 1255 count_max = mp->dmai_attr.dma_attr_count_max; 1256 pfn_lo = MMU_BTOP(mp->dmai_attr.dma_attr_addr_lo); 1257 pfn_hi = MMU_BTOP(mp->dmai_attr.dma_attr_addr_hi); 1258 1259 if (px_lib_iommu_getbypass(dip, MMU_PTOB(pfn), 1260 attr, &bypass_addr) != DDI_SUCCESS) { 1261 cmn_err(CE_WARN, "bypass cookie failure %lx\n", pfn); 1262 return (DDI_DMA_NOMAPPING); 1263 } 1264 pfn = MMU_BTOP(bypass_addr); 1265 } 1266 1267 /* pfn: absolute (bypass mode) or relative (p2p mode) */ 1268 for (prev_pfn = pfn, i = 1; i < npages; 1269 i++, prev_pfn = pfn, pfn_no++) { 1270 pfn = PX_GET_MP_PFN1(mp, i); 1271 if (bypass_addr) { 1272 if (px_lib_iommu_getbypass(dip, MMU_PTOB(pfn), attr, 1273 &bypass_addr) != DDI_SUCCESS) { 1274 ret = DDI_DMA_NOMAPPING; 1275 goto err; 1276 } 1277 pfn = MMU_BTOP(bypass_addr); 1278 } 1279 if ((pfn == prev_pfn + 1) && 1280 (MMU_PTOB(pfn_no + 1) - 1 <= count_max)) 1281 continue; 1282 if ((pfn < pfn_lo) || (prev_pfn > pfn_hi)) { 1283 ret = DDI_DMA_NOMAPPING; 1284 goto err; 1285 } 1286 cookie_no++; 1287 pfn_no = 0; 1288 if (cookie_no < sgllen) 1289 continue; 1290 1291 DBG(DBG_BYPASS, mp->dmai_rdip, "newwin pfn[%x-%x] %x cks\n", 1292 win_pfn0_index, i - 1, cookie_no); 1293 if (ret = px_dma_newwin(dip, dmareq, mp, cookie_no, 1294 win_pfn0_index, i - 1, win_pp, count_max, bypass_addr)) 1295 goto err; 1296 1297 win_pp = &(*win_pp)->win_next; /* win_pp = *(win_pp) */ 1298 win_no++; 1299 win_pfn0_index = i; 1300 cookie_no = 0; 1301 } 1302 if (pfn > pfn_hi) { 1303 ret = DDI_DMA_NOMAPPING; 1304 goto err; 1305 } 1306 cookie_no++; 1307 DBG(DBG_BYPASS, mp->dmai_rdip, "newwin pfn[%x-%x] %x cks\n", 1308 win_pfn0_index, i - 1, cookie_no); 1309 if (ret = px_dma_newwin(dip, dmareq, mp, cookie_no, win_pfn0_index, 1310 i - 1, win_pp, count_max, bypass_addr)) 1311 goto err; 1312 win_no++; 1313 px_dma_adjust(dmareq, mp, mp->dmai_winlst); 1314 mp->dmai_nwin = win_no; 1315 mp->dmai_rflags |= DDI_DMA_CONSISTENT | DMP_NOSYNC; 1316 mp->dmai_rflags &= ~DDI_DMA_REDZONE; 1317 mp->dmai_flags |= PX_DMAI_FLAGS_NOSYNC; 1318 cookie0_p = (ddi_dma_cookie_t *)(PX_WINLST(mp) + 1); 1319 mp->dmai_cookie = PX_WINLST(mp)->win_ncookies > 1 ? cookie0_p + 1 : 0; 1320 mp->dmai_mapping = cookie0_p->dmac_laddress; 1321 1322 px_dma_freepfn(mp); 1323 return (DDI_DMA_MAPPED); 1324 err: 1325 px_dma_freewin(mp); 1326 return (ret); 1327 } 1328 1329 int 1330 px_dma_ctl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_impl_t *mp, 1331 enum ddi_dma_ctlops cmd, off_t *offp, size_t *lenp, caddr_t *objp, 1332 uint_t cache_flags) 1333 { 1334 switch (cmd) { 1335 case DDI_DMA_SYNC: 1336 return (DDI_SUCCESS); 1337 1338 case DDI_DMA_HTOC: { 1339 off_t off = *offp; 1340 ddi_dma_cookie_t *loop_cp, *cp; 1341 px_dma_win_t *win_p = mp->dmai_winlst; 1342 1343 if (off >= mp->dmai_object.dmao_size) 1344 return (DDI_FAILURE); 1345 1346 /* locate window */ 1347 while (win_p->win_offset + win_p->win_size <= off) 1348 win_p = win_p->win_next; 1349 1350 loop_cp = cp = (ddi_dma_cookie_t *)(win_p + 1); 1351 mp->dmai_offset = win_p->win_offset; 1352 mp->dmai_size = win_p->win_size; 1353 mp->dmai_mapping = cp->dmac_laddress; /* cookie0 start addr */ 1354 1355 /* adjust cookie addr/len if we are not on cookie boundary */ 1356 off -= win_p->win_offset; /* offset within window */ 1357 for (; off >= loop_cp->dmac_size; loop_cp++) 1358 off -= loop_cp->dmac_size; /* offset within cookie */ 1359 1360 mp->dmai_cookie = loop_cp + 1; 1361 win_p->win_curseg = loop_cp - cp; 1362 cp = (ddi_dma_cookie_t *)objp; 1363 MAKE_DMA_COOKIE(cp, loop_cp->dmac_laddress + off, 1364 loop_cp->dmac_size - off); 1365 1366 DBG(DBG_DMA_CTL, dip, 1367 "HTOC: cookie - dmac_laddress=%p dmac_size=%x\n", 1368 cp->dmac_laddress, cp->dmac_size); 1369 } 1370 return (DDI_SUCCESS); 1371 1372 case DDI_DMA_REPWIN: 1373 *offp = mp->dmai_offset; 1374 *lenp = mp->dmai_size; 1375 return (DDI_SUCCESS); 1376 1377 case DDI_DMA_MOVWIN: { 1378 off_t off = *offp; 1379 ddi_dma_cookie_t *cp; 1380 px_dma_win_t *win_p = mp->dmai_winlst; 1381 1382 if (off >= mp->dmai_object.dmao_size) 1383 return (DDI_FAILURE); 1384 1385 /* locate window */ 1386 while (win_p->win_offset + win_p->win_size <= off) 1387 win_p = win_p->win_next; 1388 1389 cp = (ddi_dma_cookie_t *)(win_p + 1); 1390 mp->dmai_offset = win_p->win_offset; 1391 mp->dmai_size = win_p->win_size; 1392 mp->dmai_mapping = cp->dmac_laddress; /* cookie0 star addr */ 1393 mp->dmai_cookie = cp + 1; 1394 win_p->win_curseg = 0; 1395 1396 *(ddi_dma_cookie_t *)objp = *cp; 1397 *offp = win_p->win_offset; 1398 *lenp = win_p->win_size; 1399 DBG(DBG_DMA_CTL, dip, 1400 "HTOC: cookie - dmac_laddress=%p dmac_size=%x\n", 1401 cp->dmac_laddress, cp->dmac_size); 1402 } 1403 return (DDI_SUCCESS); 1404 1405 case DDI_DMA_NEXTWIN: { 1406 px_dma_win_t *win_p = *(px_dma_win_t **)offp; 1407 px_dma_win_t **nw_pp = (px_dma_win_t **)objp; 1408 ddi_dma_cookie_t *cp; 1409 if (!win_p) { 1410 *nw_pp = mp->dmai_winlst; 1411 return (DDI_SUCCESS); 1412 } 1413 1414 if (win_p->win_offset != mp->dmai_offset) 1415 return (DDI_DMA_STALE); 1416 if (!win_p->win_next) 1417 return (DDI_DMA_DONE); 1418 win_p = win_p->win_next; 1419 cp = (ddi_dma_cookie_t *)(win_p + 1); 1420 mp->dmai_offset = win_p->win_offset; 1421 mp->dmai_size = win_p->win_size; 1422 mp->dmai_mapping = cp->dmac_laddress; /* cookie0 star addr */ 1423 mp->dmai_cookie = cp + 1; 1424 win_p->win_curseg = 0; 1425 *nw_pp = win_p; 1426 } 1427 return (DDI_SUCCESS); 1428 1429 case DDI_DMA_NEXTSEG: { 1430 px_dma_win_t *w_p = *(px_dma_win_t **)offp; 1431 if (w_p->win_offset != mp->dmai_offset) 1432 return (DDI_DMA_STALE); 1433 if (w_p->win_curseg + 1 >= w_p->win_ncookies) 1434 return (DDI_DMA_DONE); 1435 w_p->win_curseg++; 1436 } 1437 *(ddi_dma_seg_t *)objp = (ddi_dma_seg_t)mp; 1438 return (DDI_SUCCESS); 1439 1440 case DDI_DMA_SEGTOC: { 1441 px_dma_win_t *win_p = mp->dmai_winlst; 1442 off_t off = mp->dmai_offset; 1443 ddi_dma_cookie_t *cp; 1444 int i; 1445 1446 /* locate active window */ 1447 for (; win_p->win_offset != off; win_p = win_p->win_next) 1448 ; 1449 cp = (ddi_dma_cookie_t *)(win_p + 1); 1450 for (i = 0; i < win_p->win_curseg; i++, cp++) 1451 off += cp->dmac_size; 1452 *offp = off; 1453 *lenp = cp->dmac_size; 1454 *(ddi_dma_cookie_t *)objp = *cp; /* copy cookie */ 1455 } 1456 return (DDI_SUCCESS); 1457 1458 case DDI_DMA_COFF: { 1459 px_dma_win_t *win_p; 1460 ddi_dma_cookie_t *cp; 1461 uint64_t addr, key = ((ddi_dma_cookie_t *)offp)->dmac_laddress; 1462 size_t win_off; 1463 1464 for (win_p = mp->dmai_winlst; win_p; win_p = win_p->win_next) { 1465 int i; 1466 win_off = 0; 1467 cp = (ddi_dma_cookie_t *)(win_p + 1); 1468 for (i = 0; i < win_p->win_ncookies; i++, cp++) { 1469 size_t sz = cp->dmac_size; 1470 1471 addr = cp->dmac_laddress; 1472 if ((addr <= key) && (addr + sz >= key)) 1473 goto found; 1474 win_off += sz; 1475 } 1476 } 1477 return (DDI_FAILURE); 1478 found: 1479 *objp = (caddr_t)(win_p->win_offset + win_off + (key - addr)); 1480 return (DDI_SUCCESS); 1481 } 1482 default: 1483 DBG(DBG_DMA_CTL, dip, "unknown command (%x): rdip=%s%d\n", 1484 cmd, ddi_driver_name(rdip), ddi_get_instance(rdip)); 1485 break; 1486 } 1487 return (DDI_FAILURE); 1488 } 1489 1490 static void 1491 px_dvma_debug_init(px_mmu_t *mmu_p) 1492 { 1493 size_t sz = sizeof (struct px_dvma_rec) * px_dvma_debug_rec; 1494 ASSERT(MUTEX_HELD(&mmu_p->dvma_debug_lock)); 1495 cmn_err(CE_NOTE, "PCI Express DVMA %p stat ON", mmu_p); 1496 1497 mmu_p->dvma_alloc_rec = kmem_alloc(sz, KM_SLEEP); 1498 mmu_p->dvma_free_rec = kmem_alloc(sz, KM_SLEEP); 1499 1500 mmu_p->dvma_active_list = NULL; 1501 mmu_p->dvma_alloc_rec_index = 0; 1502 mmu_p->dvma_free_rec_index = 0; 1503 mmu_p->dvma_active_count = 0; 1504 } 1505 1506 void 1507 px_dvma_debug_fini(px_mmu_t *mmu_p) 1508 { 1509 struct px_dvma_rec *prev, *ptr; 1510 size_t sz = sizeof (struct px_dvma_rec) * px_dvma_debug_rec; 1511 uint64_t mask = ~(1ull << mmu_p->mmu_inst); 1512 cmn_err(CE_NOTE, "PCI Express DVMA %p stat OFF", mmu_p); 1513 1514 if (mmu_p->dvma_alloc_rec) { 1515 kmem_free(mmu_p->dvma_alloc_rec, sz); 1516 mmu_p->dvma_alloc_rec = NULL; 1517 } 1518 if (mmu_p->dvma_free_rec) { 1519 kmem_free(mmu_p->dvma_free_rec, sz); 1520 mmu_p->dvma_free_rec = NULL; 1521 } 1522 1523 prev = mmu_p->dvma_active_list; 1524 if (!prev) 1525 return; 1526 for (ptr = prev->next; ptr; prev = ptr, ptr = ptr->next) 1527 kmem_free(prev, sizeof (struct px_dvma_rec)); 1528 kmem_free(prev, sizeof (struct px_dvma_rec)); 1529 1530 mmu_p->dvma_active_list = NULL; 1531 mmu_p->dvma_alloc_rec_index = 0; 1532 mmu_p->dvma_free_rec_index = 0; 1533 mmu_p->dvma_active_count = 0; 1534 1535 px_dvma_debug_off &= mask; 1536 px_dvma_debug_on &= mask; 1537 } 1538 1539 void 1540 px_dvma_alloc_debug(px_mmu_t *mmu_p, char *address, uint_t len, 1541 ddi_dma_impl_t *mp) 1542 { 1543 struct px_dvma_rec *ptr; 1544 mutex_enter(&mmu_p->dvma_debug_lock); 1545 1546 if (!mmu_p->dvma_alloc_rec) 1547 px_dvma_debug_init(mmu_p); 1548 if (PX_DVMA_DBG_OFF(mmu_p)) { 1549 px_dvma_debug_fini(mmu_p); 1550 goto done; 1551 } 1552 1553 ptr = &mmu_p->dvma_alloc_rec[mmu_p->dvma_alloc_rec_index]; 1554 ptr->dvma_addr = address; 1555 ptr->len = len; 1556 ptr->mp = mp; 1557 if (++mmu_p->dvma_alloc_rec_index == px_dvma_debug_rec) 1558 mmu_p->dvma_alloc_rec_index = 0; 1559 1560 ptr = kmem_alloc(sizeof (struct px_dvma_rec), KM_SLEEP); 1561 ptr->dvma_addr = address; 1562 ptr->len = len; 1563 ptr->mp = mp; 1564 1565 ptr->next = mmu_p->dvma_active_list; 1566 mmu_p->dvma_active_list = ptr; 1567 mmu_p->dvma_active_count++; 1568 done: 1569 mutex_exit(&mmu_p->dvma_debug_lock); 1570 } 1571 1572 void 1573 px_dvma_free_debug(px_mmu_t *mmu_p, char *address, uint_t len, 1574 ddi_dma_impl_t *mp) 1575 { 1576 struct px_dvma_rec *ptr, *ptr_save; 1577 mutex_enter(&mmu_p->dvma_debug_lock); 1578 1579 if (!mmu_p->dvma_alloc_rec) 1580 px_dvma_debug_init(mmu_p); 1581 if (PX_DVMA_DBG_OFF(mmu_p)) { 1582 px_dvma_debug_fini(mmu_p); 1583 goto done; 1584 } 1585 1586 ptr = &mmu_p->dvma_free_rec[mmu_p->dvma_free_rec_index]; 1587 ptr->dvma_addr = address; 1588 ptr->len = len; 1589 ptr->mp = mp; 1590 if (++mmu_p->dvma_free_rec_index == px_dvma_debug_rec) 1591 mmu_p->dvma_free_rec_index = 0; 1592 1593 ptr_save = mmu_p->dvma_active_list; 1594 for (ptr = ptr_save; ptr; ptr = ptr->next) { 1595 if ((ptr->dvma_addr == address) && (ptr->len = len)) 1596 break; 1597 ptr_save = ptr; 1598 } 1599 if (!ptr) { 1600 cmn_err(CE_WARN, "bad dvma free addr=%lx len=%x", 1601 (long)address, len); 1602 goto done; 1603 } 1604 if (ptr == mmu_p->dvma_active_list) 1605 mmu_p->dvma_active_list = ptr->next; 1606 else 1607 ptr_save->next = ptr->next; 1608 kmem_free(ptr, sizeof (struct px_dvma_rec)); 1609 mmu_p->dvma_active_count--; 1610 done: 1611 mutex_exit(&mmu_p->dvma_debug_lock); 1612 } 1613 1614 #ifdef DEBUG 1615 void 1616 px_dump_dma_handle(uint64_t flag, dev_info_t *dip, ddi_dma_impl_t *hp) 1617 { 1618 DBG(flag, dip, "mp(%p): flags=%x mapping=%lx xfer_size=%x\n", 1619 hp, hp->dmai_inuse, hp->dmai_mapping, hp->dmai_size); 1620 DBG(flag|DBG_CONT, dip, "\tnpages=%x roffset=%x rflags=%x nwin=%x\n", 1621 hp->dmai_ndvmapages, hp->dmai_roffset, hp->dmai_rflags, 1622 hp->dmai_nwin); 1623 DBG(flag|DBG_CONT, dip, "\twinsize=%x tte=%p pfnlst=%p pfn0=%p\n", 1624 hp->dmai_winsize, hp->dmai_tte, hp->dmai_pfnlst, hp->dmai_pfn0); 1625 DBG(flag|DBG_CONT, dip, "\twinlst=%x obj=%p attr=%p ckp=%p\n", 1626 hp->dmai_winlst, &hp->dmai_object, &hp->dmai_attr, 1627 hp->dmai_cookie); 1628 } 1629 #endif /* DEBUG */ 1630