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 (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 /* 26 * x86 root nexus driver 27 */ 28 29 #include <sys/sysmacros.h> 30 #include <sys/conf.h> 31 #include <sys/autoconf.h> 32 #include <sys/sysmacros.h> 33 #include <sys/debug.h> 34 #include <sys/psw.h> 35 #include <sys/ddidmareq.h> 36 #include <sys/promif.h> 37 #include <sys/devops.h> 38 #include <sys/kmem.h> 39 #include <sys/cmn_err.h> 40 #include <vm/seg.h> 41 #include <vm/seg_kmem.h> 42 #include <vm/seg_dev.h> 43 #include <sys/vmem.h> 44 #include <sys/mman.h> 45 #include <vm/hat.h> 46 #include <vm/as.h> 47 #include <vm/page.h> 48 #include <sys/avintr.h> 49 #include <sys/errno.h> 50 #include <sys/modctl.h> 51 #include <sys/ddi_impldefs.h> 52 #include <sys/sunddi.h> 53 #include <sys/sunndi.h> 54 #include <sys/mach_intr.h> 55 #include <sys/psm.h> 56 #include <sys/ontrap.h> 57 #include <sys/atomic.h> 58 #include <sys/sdt.h> 59 #include <sys/rootnex.h> 60 #include <vm/hat_i86.h> 61 #include <sys/ddifm.h> 62 #include <sys/ddi_isa.h> 63 #include <sys/apic.h> 64 65 #ifdef __xpv 66 #include <sys/bootinfo.h> 67 #include <sys/hypervisor.h> 68 #include <sys/bootconf.h> 69 #include <vm/kboot_mmu.h> 70 #endif 71 72 #if defined(__amd64) && !defined(__xpv) 73 #include <sys/immu.h> 74 #endif 75 76 77 /* 78 * enable/disable extra checking of function parameters. Useful for debugging 79 * drivers. 80 */ 81 #ifdef DEBUG 82 int rootnex_alloc_check_parms = 1; 83 int rootnex_bind_check_parms = 1; 84 int rootnex_bind_check_inuse = 1; 85 int rootnex_unbind_verify_buffer = 0; 86 int rootnex_sync_check_parms = 1; 87 #else 88 int rootnex_alloc_check_parms = 0; 89 int rootnex_bind_check_parms = 0; 90 int rootnex_bind_check_inuse = 0; 91 int rootnex_unbind_verify_buffer = 0; 92 int rootnex_sync_check_parms = 0; 93 #endif 94 95 boolean_t rootnex_dmar_not_setup; 96 97 /* Master Abort and Target Abort panic flag */ 98 int rootnex_fm_ma_ta_panic_flag = 0; 99 100 /* Semi-temporary patchables to phase in bug fixes, test drivers, etc. */ 101 int rootnex_bind_fail = 1; 102 int rootnex_bind_warn = 1; 103 uint8_t *rootnex_warn_list; 104 /* bitmasks for rootnex_warn_list. Up to 8 different warnings with uint8_t */ 105 #define ROOTNEX_BIND_WARNING (0x1 << 0) 106 107 /* 108 * revert back to old broken behavior of always sync'ing entire copy buffer. 109 * This is useful if be have a buggy driver which doesn't correctly pass in 110 * the offset and size into ddi_dma_sync(). 111 */ 112 int rootnex_sync_ignore_params = 0; 113 114 /* 115 * For the 64-bit kernel, pre-alloc enough cookies for a 256K buffer plus 1 116 * page for alignment. For the 32-bit kernel, pre-alloc enough cookies for a 117 * 64K buffer plus 1 page for alignment (we have less kernel space in a 32-bit 118 * kernel). Allocate enough windows to handle a 256K buffer w/ at least 65 119 * sgllen DMA engine, and enough copybuf buffer state pages to handle 2 pages 120 * (< 8K). We will still need to allocate the copy buffer during bind though 121 * (if we need one). These can only be modified in /etc/system before rootnex 122 * attach. 123 */ 124 #if defined(__amd64) 125 int rootnex_prealloc_cookies = 65; 126 int rootnex_prealloc_windows = 4; 127 int rootnex_prealloc_copybuf = 2; 128 #else 129 int rootnex_prealloc_cookies = 33; 130 int rootnex_prealloc_windows = 4; 131 int rootnex_prealloc_copybuf = 2; 132 #endif 133 134 /* driver global state */ 135 static rootnex_state_t *rootnex_state; 136 137 #ifdef DEBUG 138 /* shortcut to rootnex counters */ 139 static uint64_t *rootnex_cnt; 140 #endif 141 142 /* 143 * XXX - does x86 even need these or are they left over from the SPARC days? 144 */ 145 /* statically defined integer/boolean properties for the root node */ 146 static rootnex_intprop_t rootnex_intprp[] = { 147 { "PAGESIZE", PAGESIZE }, 148 { "MMU_PAGESIZE", MMU_PAGESIZE }, 149 { "MMU_PAGEOFFSET", MMU_PAGEOFFSET }, 150 { DDI_RELATIVE_ADDRESSING, 1 }, 151 }; 152 #define NROOT_INTPROPS (sizeof (rootnex_intprp) / sizeof (rootnex_intprop_t)) 153 154 /* 155 * If we're dom0, we're using a real device so we need to load 156 * the cookies with MFNs instead of PFNs. 157 */ 158 #ifdef __xpv 159 typedef maddr_t rootnex_addr_t; 160 #define ROOTNEX_PADDR_TO_RBASE(pa) \ 161 (DOMAIN_IS_INITDOMAIN(xen_info) ? pa_to_ma(pa) : (pa)) 162 #else 163 typedef paddr_t rootnex_addr_t; 164 #define ROOTNEX_PADDR_TO_RBASE(pa) (pa) 165 #endif 166 167 #if !defined(__xpv) 168 char _depends_on[] = "misc/iommulib misc/acpica"; 169 #endif 170 171 static struct cb_ops rootnex_cb_ops = { 172 nodev, /* open */ 173 nodev, /* close */ 174 nodev, /* strategy */ 175 nodev, /* print */ 176 nodev, /* dump */ 177 nodev, /* read */ 178 nodev, /* write */ 179 nodev, /* ioctl */ 180 nodev, /* devmap */ 181 nodev, /* mmap */ 182 nodev, /* segmap */ 183 nochpoll, /* chpoll */ 184 ddi_prop_op, /* cb_prop_op */ 185 NULL, /* struct streamtab */ 186 D_NEW | D_MP | D_HOTPLUG, /* compatibility flags */ 187 CB_REV, /* Rev */ 188 nodev, /* cb_aread */ 189 nodev /* cb_awrite */ 190 }; 191 192 static int rootnex_map(dev_info_t *dip, dev_info_t *rdip, ddi_map_req_t *mp, 193 off_t offset, off_t len, caddr_t *vaddrp); 194 static int rootnex_map_fault(dev_info_t *dip, dev_info_t *rdip, 195 struct hat *hat, struct seg *seg, caddr_t addr, 196 struct devpage *dp, pfn_t pfn, uint_t prot, uint_t lock); 197 static int rootnex_dma_map(dev_info_t *dip, dev_info_t *rdip, 198 struct ddi_dma_req *dmareq, ddi_dma_handle_t *handlep); 199 static int rootnex_dma_allochdl(dev_info_t *dip, dev_info_t *rdip, 200 ddi_dma_attr_t *attr, int (*waitfp)(caddr_t), caddr_t arg, 201 ddi_dma_handle_t *handlep); 202 static int rootnex_dma_freehdl(dev_info_t *dip, dev_info_t *rdip, 203 ddi_dma_handle_t handle); 204 static int rootnex_dma_bindhdl(dev_info_t *dip, dev_info_t *rdip, 205 ddi_dma_handle_t handle, struct ddi_dma_req *dmareq, 206 ddi_dma_cookie_t *cookiep, uint_t *ccountp); 207 static int rootnex_dma_unbindhdl(dev_info_t *dip, dev_info_t *rdip, 208 ddi_dma_handle_t handle); 209 static int rootnex_dma_sync(dev_info_t *dip, dev_info_t *rdip, 210 ddi_dma_handle_t handle, off_t off, size_t len, uint_t cache_flags); 211 static int rootnex_dma_win(dev_info_t *dip, dev_info_t *rdip, 212 ddi_dma_handle_t handle, uint_t win, off_t *offp, size_t *lenp, 213 ddi_dma_cookie_t *cookiep, uint_t *ccountp); 214 static int rootnex_dma_mctl(dev_info_t *dip, dev_info_t *rdip, 215 ddi_dma_handle_t handle, enum ddi_dma_ctlops request, 216 off_t *offp, size_t *lenp, caddr_t *objp, uint_t cache_flags); 217 static int rootnex_ctlops(dev_info_t *dip, dev_info_t *rdip, 218 ddi_ctl_enum_t ctlop, void *arg, void *result); 219 static int rootnex_fm_init(dev_info_t *dip, dev_info_t *tdip, int tcap, 220 ddi_iblock_cookie_t *ibc); 221 static int rootnex_intr_ops(dev_info_t *pdip, dev_info_t *rdip, 222 ddi_intr_op_t intr_op, ddi_intr_handle_impl_t *hdlp, void *result); 223 static int rootnex_alloc_intr_fixed(dev_info_t *, ddi_intr_handle_impl_t *, 224 void *); 225 static int rootnex_free_intr_fixed(dev_info_t *, ddi_intr_handle_impl_t *); 226 227 static int rootnex_coredma_allochdl(dev_info_t *dip, dev_info_t *rdip, 228 ddi_dma_attr_t *attr, int (*waitfp)(caddr_t), caddr_t arg, 229 ddi_dma_handle_t *handlep); 230 static int rootnex_coredma_freehdl(dev_info_t *dip, dev_info_t *rdip, 231 ddi_dma_handle_t handle); 232 static int rootnex_coredma_bindhdl(dev_info_t *dip, dev_info_t *rdip, 233 ddi_dma_handle_t handle, struct ddi_dma_req *dmareq, 234 ddi_dma_cookie_t *cookiep, uint_t *ccountp); 235 static int rootnex_coredma_unbindhdl(dev_info_t *dip, dev_info_t *rdip, 236 ddi_dma_handle_t handle); 237 #if defined(__amd64) && !defined(__xpv) 238 static void rootnex_coredma_reset_cookies(dev_info_t *dip, 239 ddi_dma_handle_t handle); 240 static int rootnex_coredma_get_cookies(dev_info_t *dip, ddi_dma_handle_t handle, 241 ddi_dma_cookie_t **cookiepp, uint_t *ccountp); 242 static int rootnex_coredma_set_cookies(dev_info_t *dip, ddi_dma_handle_t handle, 243 ddi_dma_cookie_t *cookiep, uint_t ccount); 244 static int rootnex_coredma_clear_cookies(dev_info_t *dip, 245 ddi_dma_handle_t handle); 246 static int rootnex_coredma_get_sleep_flags(ddi_dma_handle_t handle); 247 #endif 248 static int rootnex_coredma_sync(dev_info_t *dip, dev_info_t *rdip, 249 ddi_dma_handle_t handle, off_t off, size_t len, uint_t cache_flags); 250 static int rootnex_coredma_win(dev_info_t *dip, dev_info_t *rdip, 251 ddi_dma_handle_t handle, uint_t win, off_t *offp, size_t *lenp, 252 ddi_dma_cookie_t *cookiep, uint_t *ccountp); 253 254 #if defined(__amd64) && !defined(__xpv) 255 static int rootnex_coredma_hdl_setprivate(dev_info_t *dip, dev_info_t *rdip, 256 ddi_dma_handle_t handle, void *v); 257 static void *rootnex_coredma_hdl_getprivate(dev_info_t *dip, dev_info_t *rdip, 258 ddi_dma_handle_t handle); 259 #endif 260 261 262 static struct bus_ops rootnex_bus_ops = { 263 BUSO_REV, 264 rootnex_map, 265 NULL, 266 NULL, 267 NULL, 268 rootnex_map_fault, 269 rootnex_dma_map, 270 rootnex_dma_allochdl, 271 rootnex_dma_freehdl, 272 rootnex_dma_bindhdl, 273 rootnex_dma_unbindhdl, 274 rootnex_dma_sync, 275 rootnex_dma_win, 276 rootnex_dma_mctl, 277 rootnex_ctlops, 278 ddi_bus_prop_op, 279 i_ddi_rootnex_get_eventcookie, 280 i_ddi_rootnex_add_eventcall, 281 i_ddi_rootnex_remove_eventcall, 282 i_ddi_rootnex_post_event, 283 0, /* bus_intr_ctl */ 284 0, /* bus_config */ 285 0, /* bus_unconfig */ 286 rootnex_fm_init, /* bus_fm_init */ 287 NULL, /* bus_fm_fini */ 288 NULL, /* bus_fm_access_enter */ 289 NULL, /* bus_fm_access_exit */ 290 NULL, /* bus_powr */ 291 rootnex_intr_ops /* bus_intr_op */ 292 }; 293 294 static int rootnex_attach(dev_info_t *dip, ddi_attach_cmd_t cmd); 295 static int rootnex_detach(dev_info_t *dip, ddi_detach_cmd_t cmd); 296 static int rootnex_quiesce(dev_info_t *dip); 297 298 static struct dev_ops rootnex_ops = { 299 DEVO_REV, 300 0, 301 ddi_no_info, 302 nulldev, 303 nulldev, 304 rootnex_attach, 305 rootnex_detach, 306 nulldev, 307 &rootnex_cb_ops, 308 &rootnex_bus_ops, 309 NULL, 310 rootnex_quiesce, /* quiesce */ 311 }; 312 313 static struct modldrv rootnex_modldrv = { 314 &mod_driverops, 315 "i86pc root nexus", 316 &rootnex_ops 317 }; 318 319 static struct modlinkage rootnex_modlinkage = { 320 MODREV_1, 321 (void *)&rootnex_modldrv, 322 NULL 323 }; 324 325 #if defined(__amd64) && !defined(__xpv) 326 static iommulib_nexops_t iommulib_nexops = { 327 IOMMU_NEXOPS_VERSION, 328 "Rootnex IOMMU ops Vers 1.1", 329 NULL, 330 rootnex_coredma_allochdl, 331 rootnex_coredma_freehdl, 332 rootnex_coredma_bindhdl, 333 rootnex_coredma_unbindhdl, 334 rootnex_coredma_reset_cookies, 335 rootnex_coredma_get_cookies, 336 rootnex_coredma_set_cookies, 337 rootnex_coredma_clear_cookies, 338 rootnex_coredma_get_sleep_flags, 339 rootnex_coredma_sync, 340 rootnex_coredma_win, 341 rootnex_dma_map, 342 rootnex_dma_mctl, 343 rootnex_coredma_hdl_setprivate, 344 rootnex_coredma_hdl_getprivate 345 }; 346 #endif 347 348 /* 349 * extern hacks 350 */ 351 extern struct seg_ops segdev_ops; 352 extern int ignore_hardware_nodes; /* force flag from ddi_impl.c */ 353 #ifdef DDI_MAP_DEBUG 354 extern int ddi_map_debug_flag; 355 #define ddi_map_debug if (ddi_map_debug_flag) prom_printf 356 #endif 357 extern void i86_pp_map(page_t *pp, caddr_t kaddr); 358 extern void i86_va_map(caddr_t vaddr, struct as *asp, caddr_t kaddr); 359 extern int (*psm_intr_ops)(dev_info_t *, ddi_intr_handle_impl_t *, 360 psm_intr_op_t, int *); 361 extern int impl_ddi_sunbus_initchild(dev_info_t *dip); 362 extern void impl_ddi_sunbus_removechild(dev_info_t *dip); 363 364 /* 365 * Use device arena to use for device control register mappings. 366 * Various kernel memory walkers (debugger, dtrace) need to know 367 * to avoid this address range to prevent undesired device activity. 368 */ 369 extern void *device_arena_alloc(size_t size, int vm_flag); 370 extern void device_arena_free(void * vaddr, size_t size); 371 372 373 /* 374 * Internal functions 375 */ 376 static int rootnex_dma_init(); 377 static void rootnex_add_props(dev_info_t *); 378 static int rootnex_ctl_reportdev(dev_info_t *dip); 379 static struct intrspec *rootnex_get_ispec(dev_info_t *rdip, int inum); 380 static int rootnex_map_regspec(ddi_map_req_t *mp, caddr_t *vaddrp); 381 static int rootnex_unmap_regspec(ddi_map_req_t *mp, caddr_t *vaddrp); 382 static int rootnex_map_handle(ddi_map_req_t *mp); 383 static void rootnex_clean_dmahdl(ddi_dma_impl_t *hp); 384 static int rootnex_valid_alloc_parms(ddi_dma_attr_t *attr, uint_t maxsegsize); 385 static int rootnex_valid_bind_parms(ddi_dma_req_t *dmareq, 386 ddi_dma_attr_t *attr); 387 static void rootnex_get_sgl(ddi_dma_obj_t *dmar_object, ddi_dma_cookie_t *sgl, 388 rootnex_sglinfo_t *sglinfo); 389 static void rootnex_dvma_get_sgl(ddi_dma_obj_t *dmar_object, 390 ddi_dma_cookie_t *sgl, rootnex_sglinfo_t *sglinfo); 391 static int rootnex_bind_slowpath(ddi_dma_impl_t *hp, struct ddi_dma_req *dmareq, 392 rootnex_dma_t *dma, ddi_dma_attr_t *attr, ddi_dma_obj_t *dmao, int kmflag); 393 static int rootnex_setup_copybuf(ddi_dma_impl_t *hp, struct ddi_dma_req *dmareq, 394 rootnex_dma_t *dma, ddi_dma_attr_t *attr); 395 static void rootnex_teardown_copybuf(rootnex_dma_t *dma); 396 static int rootnex_setup_windows(ddi_dma_impl_t *hp, rootnex_dma_t *dma, 397 ddi_dma_attr_t *attr, ddi_dma_obj_t *dmao, int kmflag); 398 static void rootnex_teardown_windows(rootnex_dma_t *dma); 399 static void rootnex_init_win(ddi_dma_impl_t *hp, rootnex_dma_t *dma, 400 rootnex_window_t *window, ddi_dma_cookie_t *cookie, off_t cur_offset); 401 static void rootnex_setup_cookie(ddi_dma_obj_t *dmar_object, 402 rootnex_dma_t *dma, ddi_dma_cookie_t *cookie, off_t cur_offset, 403 size_t *copybuf_used, page_t **cur_pp); 404 static int rootnex_sgllen_window_boundary(ddi_dma_impl_t *hp, 405 rootnex_dma_t *dma, rootnex_window_t **windowp, ddi_dma_cookie_t *cookie, 406 ddi_dma_attr_t *attr, off_t cur_offset); 407 static int rootnex_copybuf_window_boundary(ddi_dma_impl_t *hp, 408 rootnex_dma_t *dma, rootnex_window_t **windowp, 409 ddi_dma_cookie_t *cookie, off_t cur_offset, size_t *copybuf_used); 410 static int rootnex_maxxfer_window_boundary(ddi_dma_impl_t *hp, 411 rootnex_dma_t *dma, rootnex_window_t **windowp, ddi_dma_cookie_t *cookie); 412 static int rootnex_valid_sync_parms(ddi_dma_impl_t *hp, rootnex_window_t *win, 413 off_t offset, size_t size, uint_t cache_flags); 414 static int rootnex_verify_buffer(rootnex_dma_t *dma); 415 static int rootnex_dma_check(dev_info_t *dip, const void *handle, 416 const void *comp_addr, const void *not_used); 417 static boolean_t rootnex_need_bounce_seg(ddi_dma_obj_t *dmar_object, 418 rootnex_sglinfo_t *sglinfo); 419 static struct as *rootnex_get_as(ddi_dma_obj_t *dmar_object); 420 421 /* 422 * _init() 423 * 424 */ 425 int 426 _init(void) 427 { 428 429 rootnex_state = NULL; 430 return (mod_install(&rootnex_modlinkage)); 431 } 432 433 434 /* 435 * _info() 436 * 437 */ 438 int 439 _info(struct modinfo *modinfop) 440 { 441 return (mod_info(&rootnex_modlinkage, modinfop)); 442 } 443 444 445 /* 446 * _fini() 447 * 448 */ 449 int 450 _fini(void) 451 { 452 return (EBUSY); 453 } 454 455 456 /* 457 * rootnex_attach() 458 * 459 */ 460 static int 461 rootnex_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 462 { 463 int fmcap; 464 int e; 465 466 switch (cmd) { 467 case DDI_ATTACH: 468 break; 469 case DDI_RESUME: 470 #if defined(__amd64) && !defined(__xpv) 471 return (immu_unquiesce()); 472 #else 473 return (DDI_SUCCESS); 474 #endif 475 default: 476 return (DDI_FAILURE); 477 } 478 479 /* 480 * We should only have one instance of rootnex. Save it away since we 481 * don't have an easy way to get it back later. 482 */ 483 ASSERT(rootnex_state == NULL); 484 rootnex_state = kmem_zalloc(sizeof (rootnex_state_t), KM_SLEEP); 485 486 rootnex_state->r_dip = dip; 487 rootnex_state->r_err_ibc = (ddi_iblock_cookie_t)ipltospl(15); 488 rootnex_state->r_reserved_msg_printed = B_FALSE; 489 #ifdef DEBUG 490 rootnex_cnt = &rootnex_state->r_counters[0]; 491 #endif 492 493 /* 494 * Set minimum fm capability level for i86pc platforms and then 495 * initialize error handling. Since we're the rootnex, we don't 496 * care what's returned in the fmcap field. 497 */ 498 ddi_system_fmcap = DDI_FM_EREPORT_CAPABLE | DDI_FM_ERRCB_CAPABLE | 499 DDI_FM_ACCCHK_CAPABLE | DDI_FM_DMACHK_CAPABLE; 500 fmcap = ddi_system_fmcap; 501 ddi_fm_init(dip, &fmcap, &rootnex_state->r_err_ibc); 502 503 /* initialize DMA related state */ 504 e = rootnex_dma_init(); 505 if (e != DDI_SUCCESS) { 506 kmem_free(rootnex_state, sizeof (rootnex_state_t)); 507 return (DDI_FAILURE); 508 } 509 510 /* Add static root node properties */ 511 rootnex_add_props(dip); 512 513 /* since we can't call ddi_report_dev() */ 514 cmn_err(CE_CONT, "?root nexus = %s\n", ddi_get_name(dip)); 515 516 /* Initialize rootnex event handle */ 517 i_ddi_rootnex_init_events(dip); 518 519 #if defined(__amd64) && !defined(__xpv) 520 e = iommulib_nexus_register(dip, &iommulib_nexops, 521 &rootnex_state->r_iommulib_handle); 522 523 ASSERT(e == DDI_SUCCESS); 524 #endif 525 526 return (DDI_SUCCESS); 527 } 528 529 530 /* 531 * rootnex_detach() 532 * 533 */ 534 /*ARGSUSED*/ 535 static int 536 rootnex_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 537 { 538 switch (cmd) { 539 case DDI_SUSPEND: 540 #if defined(__amd64) && !defined(__xpv) 541 return (immu_quiesce()); 542 #else 543 return (DDI_SUCCESS); 544 #endif 545 default: 546 return (DDI_FAILURE); 547 } 548 /*NOTREACHED*/ 549 550 } 551 552 553 /* 554 * rootnex_dma_init() 555 * 556 */ 557 /*ARGSUSED*/ 558 static int 559 rootnex_dma_init() 560 { 561 size_t bufsize; 562 563 564 /* 565 * size of our cookie/window/copybuf state needed in dma bind that we 566 * pre-alloc in dma_alloc_handle 567 */ 568 rootnex_state->r_prealloc_cookies = rootnex_prealloc_cookies; 569 rootnex_state->r_prealloc_size = 570 (rootnex_state->r_prealloc_cookies * sizeof (ddi_dma_cookie_t)) + 571 (rootnex_prealloc_windows * sizeof (rootnex_window_t)) + 572 (rootnex_prealloc_copybuf * sizeof (rootnex_pgmap_t)); 573 574 /* 575 * setup DDI DMA handle kmem cache, align each handle on 64 bytes, 576 * allocate 16 extra bytes for struct pointer alignment 577 * (p->dmai_private & dma->dp_prealloc_buffer) 578 */ 579 bufsize = sizeof (ddi_dma_impl_t) + sizeof (rootnex_dma_t) + 580 rootnex_state->r_prealloc_size + 0x10; 581 rootnex_state->r_dmahdl_cache = kmem_cache_create("rootnex_dmahdl", 582 bufsize, 64, NULL, NULL, NULL, NULL, NULL, 0); 583 if (rootnex_state->r_dmahdl_cache == NULL) { 584 return (DDI_FAILURE); 585 } 586 587 /* 588 * allocate array to track which major numbers we have printed warnings 589 * for. 590 */ 591 rootnex_warn_list = kmem_zalloc(devcnt * sizeof (*rootnex_warn_list), 592 KM_SLEEP); 593 594 return (DDI_SUCCESS); 595 } 596 597 598 /* 599 * rootnex_add_props() 600 * 601 */ 602 static void 603 rootnex_add_props(dev_info_t *dip) 604 { 605 rootnex_intprop_t *rpp; 606 int i; 607 608 /* Add static integer/boolean properties to the root node */ 609 rpp = rootnex_intprp; 610 for (i = 0; i < NROOT_INTPROPS; i++) { 611 (void) e_ddi_prop_update_int(DDI_DEV_T_NONE, dip, 612 rpp[i].prop_name, rpp[i].prop_value); 613 } 614 } 615 616 617 618 /* 619 * ************************* 620 * ctlops related routines 621 * ************************* 622 */ 623 624 /* 625 * rootnex_ctlops() 626 * 627 */ 628 /*ARGSUSED*/ 629 static int 630 rootnex_ctlops(dev_info_t *dip, dev_info_t *rdip, ddi_ctl_enum_t ctlop, 631 void *arg, void *result) 632 { 633 int n, *ptr; 634 struct ddi_parent_private_data *pdp; 635 636 switch (ctlop) { 637 case DDI_CTLOPS_DMAPMAPC: 638 /* 639 * Return 'partial' to indicate that dma mapping 640 * has to be done in the main MMU. 641 */ 642 return (DDI_DMA_PARTIAL); 643 644 case DDI_CTLOPS_BTOP: 645 /* 646 * Convert byte count input to physical page units. 647 * (byte counts that are not a page-size multiple 648 * are rounded down) 649 */ 650 *(ulong_t *)result = btop(*(ulong_t *)arg); 651 return (DDI_SUCCESS); 652 653 case DDI_CTLOPS_PTOB: 654 /* 655 * Convert size in physical pages to bytes 656 */ 657 *(ulong_t *)result = ptob(*(ulong_t *)arg); 658 return (DDI_SUCCESS); 659 660 case DDI_CTLOPS_BTOPR: 661 /* 662 * Convert byte count input to physical page units 663 * (byte counts that are not a page-size multiple 664 * are rounded up) 665 */ 666 *(ulong_t *)result = btopr(*(ulong_t *)arg); 667 return (DDI_SUCCESS); 668 669 case DDI_CTLOPS_INITCHILD: 670 return (impl_ddi_sunbus_initchild(arg)); 671 672 case DDI_CTLOPS_UNINITCHILD: 673 impl_ddi_sunbus_removechild(arg); 674 return (DDI_SUCCESS); 675 676 case DDI_CTLOPS_REPORTDEV: 677 return (rootnex_ctl_reportdev(rdip)); 678 679 case DDI_CTLOPS_IOMIN: 680 /* 681 * Nothing to do here but reflect back.. 682 */ 683 return (DDI_SUCCESS); 684 685 case DDI_CTLOPS_REGSIZE: 686 case DDI_CTLOPS_NREGS: 687 break; 688 689 case DDI_CTLOPS_SIDDEV: 690 if (ndi_dev_is_prom_node(rdip)) 691 return (DDI_SUCCESS); 692 if (ndi_dev_is_persistent_node(rdip)) 693 return (DDI_SUCCESS); 694 return (DDI_FAILURE); 695 696 case DDI_CTLOPS_POWER: 697 return ((*pm_platform_power)((power_req_t *)arg)); 698 699 case DDI_CTLOPS_RESERVED0: /* Was DDI_CTLOPS_NINTRS, obsolete */ 700 case DDI_CTLOPS_RESERVED1: /* Was DDI_CTLOPS_POKE_INIT, obsolete */ 701 case DDI_CTLOPS_RESERVED2: /* Was DDI_CTLOPS_POKE_FLUSH, obsolete */ 702 case DDI_CTLOPS_RESERVED3: /* Was DDI_CTLOPS_POKE_FINI, obsolete */ 703 case DDI_CTLOPS_RESERVED4: /* Was DDI_CTLOPS_INTR_HILEVEL, obsolete */ 704 case DDI_CTLOPS_RESERVED5: /* Was DDI_CTLOPS_XLATE_INTRS, obsolete */ 705 if (!rootnex_state->r_reserved_msg_printed) { 706 rootnex_state->r_reserved_msg_printed = B_TRUE; 707 cmn_err(CE_WARN, "Failing ddi_ctlops call(s) for " 708 "1 or more reserved/obsolete operations."); 709 } 710 return (DDI_FAILURE); 711 712 default: 713 return (DDI_FAILURE); 714 } 715 /* 716 * The rest are for "hardware" properties 717 */ 718 if ((pdp = ddi_get_parent_data(rdip)) == NULL) 719 return (DDI_FAILURE); 720 721 if (ctlop == DDI_CTLOPS_NREGS) { 722 ptr = (int *)result; 723 *ptr = pdp->par_nreg; 724 } else { 725 off_t *size = (off_t *)result; 726 727 ptr = (int *)arg; 728 n = *ptr; 729 if (n >= pdp->par_nreg) { 730 return (DDI_FAILURE); 731 } 732 *size = (off_t)pdp->par_reg[n].regspec_size; 733 } 734 return (DDI_SUCCESS); 735 } 736 737 738 /* 739 * rootnex_ctl_reportdev() 740 * 741 */ 742 static int 743 rootnex_ctl_reportdev(dev_info_t *dev) 744 { 745 int i, n, len, f_len = 0; 746 char *buf; 747 748 buf = kmem_alloc(REPORTDEV_BUFSIZE, KM_SLEEP); 749 f_len += snprintf(buf, REPORTDEV_BUFSIZE, 750 "%s%d at root", ddi_driver_name(dev), ddi_get_instance(dev)); 751 len = strlen(buf); 752 753 for (i = 0; i < sparc_pd_getnreg(dev); i++) { 754 755 struct regspec *rp = sparc_pd_getreg(dev, i); 756 757 if (i == 0) 758 f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, 759 ": "); 760 else 761 f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, 762 " and "); 763 len = strlen(buf); 764 765 switch (rp->regspec_bustype) { 766 767 case BTEISA: 768 f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, 769 "%s 0x%x", DEVI_EISA_NEXNAME, rp->regspec_addr); 770 break; 771 772 case BTISA: 773 f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, 774 "%s 0x%x", DEVI_ISA_NEXNAME, rp->regspec_addr); 775 break; 776 777 default: 778 f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, 779 "space %x offset %x", 780 rp->regspec_bustype, rp->regspec_addr); 781 break; 782 } 783 len = strlen(buf); 784 } 785 for (i = 0, n = sparc_pd_getnintr(dev); i < n; i++) { 786 int pri; 787 788 if (i != 0) { 789 f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, 790 ","); 791 len = strlen(buf); 792 } 793 pri = INT_IPL(sparc_pd_getintr(dev, i)->intrspec_pri); 794 f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, 795 " sparc ipl %d", pri); 796 len = strlen(buf); 797 } 798 #ifdef DEBUG 799 if (f_len + 1 >= REPORTDEV_BUFSIZE) { 800 cmn_err(CE_NOTE, "next message is truncated: " 801 "printed length 1024, real length %d", f_len); 802 } 803 #endif /* DEBUG */ 804 cmn_err(CE_CONT, "?%s\n", buf); 805 kmem_free(buf, REPORTDEV_BUFSIZE); 806 return (DDI_SUCCESS); 807 } 808 809 810 /* 811 * ****************** 812 * map related code 813 * ****************** 814 */ 815 816 /* 817 * rootnex_map() 818 * 819 */ 820 static int 821 rootnex_map(dev_info_t *dip, dev_info_t *rdip, ddi_map_req_t *mp, off_t offset, 822 off_t len, caddr_t *vaddrp) 823 { 824 struct regspec *rp, tmp_reg; 825 ddi_map_req_t mr = *mp; /* Get private copy of request */ 826 int error; 827 828 mp = &mr; 829 830 switch (mp->map_op) { 831 case DDI_MO_MAP_LOCKED: 832 case DDI_MO_UNMAP: 833 case DDI_MO_MAP_HANDLE: 834 break; 835 default: 836 #ifdef DDI_MAP_DEBUG 837 cmn_err(CE_WARN, "rootnex_map: unimplemented map op %d.", 838 mp->map_op); 839 #endif /* DDI_MAP_DEBUG */ 840 return (DDI_ME_UNIMPLEMENTED); 841 } 842 843 if (mp->map_flags & DDI_MF_USER_MAPPING) { 844 #ifdef DDI_MAP_DEBUG 845 cmn_err(CE_WARN, "rootnex_map: unimplemented map type: user."); 846 #endif /* DDI_MAP_DEBUG */ 847 return (DDI_ME_UNIMPLEMENTED); 848 } 849 850 /* 851 * First, if given an rnumber, convert it to a regspec... 852 * (Presumably, this is on behalf of a child of the root node?) 853 */ 854 855 if (mp->map_type == DDI_MT_RNUMBER) { 856 857 int rnumber = mp->map_obj.rnumber; 858 #ifdef DDI_MAP_DEBUG 859 static char *out_of_range = 860 "rootnex_map: Out of range rnumber <%d>, device <%s>"; 861 #endif /* DDI_MAP_DEBUG */ 862 863 rp = i_ddi_rnumber_to_regspec(rdip, rnumber); 864 if (rp == NULL) { 865 #ifdef DDI_MAP_DEBUG 866 cmn_err(CE_WARN, out_of_range, rnumber, 867 ddi_get_name(rdip)); 868 #endif /* DDI_MAP_DEBUG */ 869 return (DDI_ME_RNUMBER_RANGE); 870 } 871 872 /* 873 * Convert the given ddi_map_req_t from rnumber to regspec... 874 */ 875 876 mp->map_type = DDI_MT_REGSPEC; 877 mp->map_obj.rp = rp; 878 } 879 880 /* 881 * Adjust offset and length correspnding to called values... 882 * XXX: A non-zero length means override the one in the regspec 883 * XXX: (regardless of what's in the parent's range?) 884 */ 885 886 tmp_reg = *(mp->map_obj.rp); /* Preserve underlying data */ 887 rp = mp->map_obj.rp = &tmp_reg; /* Use tmp_reg in request */ 888 889 #ifdef DDI_MAP_DEBUG 890 cmn_err(CE_CONT, "rootnex: <%s,%s> <0x%x, 0x%x, 0x%d> offset %d len %d " 891 "handle 0x%x\n", ddi_get_name(dip), ddi_get_name(rdip), 892 rp->regspec_bustype, rp->regspec_addr, rp->regspec_size, offset, 893 len, mp->map_handlep); 894 #endif /* DDI_MAP_DEBUG */ 895 896 /* 897 * I/O or memory mapping: 898 * 899 * <bustype=0, addr=x, len=x>: memory 900 * <bustype=1, addr=x, len=x>: i/o 901 * <bustype>1, addr=0, len=x>: x86-compatibility i/o 902 */ 903 904 if (rp->regspec_bustype > 1 && rp->regspec_addr != 0) { 905 cmn_err(CE_WARN, "<%s,%s> invalid register spec" 906 " <0x%x, 0x%x, 0x%x>", ddi_get_name(dip), 907 ddi_get_name(rdip), rp->regspec_bustype, 908 rp->regspec_addr, rp->regspec_size); 909 return (DDI_ME_INVAL); 910 } 911 912 if (rp->regspec_bustype > 1 && rp->regspec_addr == 0) { 913 /* 914 * compatibility i/o mapping 915 */ 916 rp->regspec_bustype += (uint_t)offset; 917 } else { 918 /* 919 * Normal memory or i/o mapping 920 */ 921 rp->regspec_addr += (uint_t)offset; 922 } 923 924 if (len != 0) 925 rp->regspec_size = (uint_t)len; 926 927 #ifdef DDI_MAP_DEBUG 928 cmn_err(CE_CONT, " <%s,%s> <0x%x, 0x%x, 0x%d> offset %d " 929 "len %d handle 0x%x\n", ddi_get_name(dip), ddi_get_name(rdip), 930 rp->regspec_bustype, rp->regspec_addr, rp->regspec_size, 931 offset, len, mp->map_handlep); 932 #endif /* DDI_MAP_DEBUG */ 933 934 /* 935 * Apply any parent ranges at this level, if applicable. 936 * (This is where nexus specific regspec translation takes place. 937 * Use of this function is implicit agreement that translation is 938 * provided via ddi_apply_range.) 939 */ 940 941 #ifdef DDI_MAP_DEBUG 942 ddi_map_debug("applying range of parent <%s> to child <%s>...\n", 943 ddi_get_name(dip), ddi_get_name(rdip)); 944 #endif /* DDI_MAP_DEBUG */ 945 946 if ((error = i_ddi_apply_range(dip, rdip, mp->map_obj.rp)) != 0) 947 return (error); 948 949 switch (mp->map_op) { 950 case DDI_MO_MAP_LOCKED: 951 952 /* 953 * Set up the locked down kernel mapping to the regspec... 954 */ 955 956 return (rootnex_map_regspec(mp, vaddrp)); 957 958 case DDI_MO_UNMAP: 959 960 /* 961 * Release mapping... 962 */ 963 964 return (rootnex_unmap_regspec(mp, vaddrp)); 965 966 case DDI_MO_MAP_HANDLE: 967 968 return (rootnex_map_handle(mp)); 969 970 default: 971 return (DDI_ME_UNIMPLEMENTED); 972 } 973 } 974 975 976 /* 977 * rootnex_map_fault() 978 * 979 * fault in mappings for requestors 980 */ 981 /*ARGSUSED*/ 982 static int 983 rootnex_map_fault(dev_info_t *dip, dev_info_t *rdip, struct hat *hat, 984 struct seg *seg, caddr_t addr, struct devpage *dp, pfn_t pfn, uint_t prot, 985 uint_t lock) 986 { 987 988 #ifdef DDI_MAP_DEBUG 989 ddi_map_debug("rootnex_map_fault: address <%x> pfn <%x>", addr, pfn); 990 ddi_map_debug(" Seg <%s>\n", 991 seg->s_ops == &segdev_ops ? "segdev" : 992 seg == &kvseg ? "segkmem" : "NONE!"); 993 #endif /* DDI_MAP_DEBUG */ 994 995 /* 996 * This is all terribly broken, but it is a start 997 * 998 * XXX Note that this test means that segdev_ops 999 * must be exported from seg_dev.c. 1000 * XXX What about devices with their own segment drivers? 1001 */ 1002 if (seg->s_ops == &segdev_ops) { 1003 struct segdev_data *sdp = (struct segdev_data *)seg->s_data; 1004 1005 if (hat == NULL) { 1006 /* 1007 * This is one plausible interpretation of 1008 * a null hat i.e. use the first hat on the 1009 * address space hat list which by convention is 1010 * the hat of the system MMU. At alternative 1011 * would be to panic .. this might well be better .. 1012 */ 1013 ASSERT(AS_READ_HELD(seg->s_as, &seg->s_as->a_lock)); 1014 hat = seg->s_as->a_hat; 1015 cmn_err(CE_NOTE, "rootnex_map_fault: nil hat"); 1016 } 1017 hat_devload(hat, addr, MMU_PAGESIZE, pfn, prot | sdp->hat_attr, 1018 (lock ? HAT_LOAD_LOCK : HAT_LOAD)); 1019 } else if (seg == &kvseg && dp == NULL) { 1020 hat_devload(kas.a_hat, addr, MMU_PAGESIZE, pfn, prot, 1021 HAT_LOAD_LOCK); 1022 } else 1023 return (DDI_FAILURE); 1024 return (DDI_SUCCESS); 1025 } 1026 1027 1028 /* 1029 * rootnex_map_regspec() 1030 * we don't support mapping of I/O cards above 4Gb 1031 */ 1032 static int 1033 rootnex_map_regspec(ddi_map_req_t *mp, caddr_t *vaddrp) 1034 { 1035 rootnex_addr_t rbase; 1036 void *cvaddr; 1037 uint_t npages, pgoffset; 1038 struct regspec *rp; 1039 ddi_acc_hdl_t *hp; 1040 ddi_acc_impl_t *ap; 1041 uint_t hat_acc_flags; 1042 paddr_t pbase; 1043 1044 rp = mp->map_obj.rp; 1045 hp = mp->map_handlep; 1046 1047 #ifdef DDI_MAP_DEBUG 1048 ddi_map_debug( 1049 "rootnex_map_regspec: <0x%x 0x%x 0x%x> handle 0x%x\n", 1050 rp->regspec_bustype, rp->regspec_addr, 1051 rp->regspec_size, mp->map_handlep); 1052 #endif /* DDI_MAP_DEBUG */ 1053 1054 /* 1055 * I/O or memory mapping 1056 * 1057 * <bustype=0, addr=x, len=x>: memory 1058 * <bustype=1, addr=x, len=x>: i/o 1059 * <bustype>1, addr=0, len=x>: x86-compatibility i/o 1060 */ 1061 1062 if (rp->regspec_bustype > 1 && rp->regspec_addr != 0) { 1063 cmn_err(CE_WARN, "rootnex: invalid register spec" 1064 " <0x%x, 0x%x, 0x%x>", rp->regspec_bustype, 1065 rp->regspec_addr, rp->regspec_size); 1066 return (DDI_FAILURE); 1067 } 1068 1069 if (rp->regspec_bustype != 0) { 1070 /* 1071 * I/O space - needs a handle. 1072 */ 1073 if (hp == NULL) { 1074 return (DDI_FAILURE); 1075 } 1076 ap = (ddi_acc_impl_t *)hp->ah_platform_private; 1077 ap->ahi_acc_attr |= DDI_ACCATTR_IO_SPACE; 1078 impl_acc_hdl_init(hp); 1079 1080 if (mp->map_flags & DDI_MF_DEVICE_MAPPING) { 1081 #ifdef DDI_MAP_DEBUG 1082 ddi_map_debug("rootnex_map_regspec: mmap() " 1083 "to I/O space is not supported.\n"); 1084 #endif /* DDI_MAP_DEBUG */ 1085 return (DDI_ME_INVAL); 1086 } else { 1087 /* 1088 * 1275-compliant vs. compatibility i/o mapping 1089 */ 1090 *vaddrp = 1091 (rp->regspec_bustype > 1 && rp->regspec_addr == 0) ? 1092 ((caddr_t)(uintptr_t)rp->regspec_bustype) : 1093 ((caddr_t)(uintptr_t)rp->regspec_addr); 1094 #ifdef __xpv 1095 if (DOMAIN_IS_INITDOMAIN(xen_info)) { 1096 hp->ah_pfn = xen_assign_pfn( 1097 mmu_btop((ulong_t)rp->regspec_addr & 1098 MMU_PAGEMASK)); 1099 } else { 1100 hp->ah_pfn = mmu_btop( 1101 (ulong_t)rp->regspec_addr & MMU_PAGEMASK); 1102 } 1103 #else 1104 hp->ah_pfn = mmu_btop((ulong_t)rp->regspec_addr & 1105 MMU_PAGEMASK); 1106 #endif 1107 hp->ah_pnum = mmu_btopr(rp->regspec_size + 1108 (ulong_t)rp->regspec_addr & MMU_PAGEOFFSET); 1109 } 1110 1111 #ifdef DDI_MAP_DEBUG 1112 ddi_map_debug( 1113 "rootnex_map_regspec: \"Mapping\" %d bytes I/O space at 0x%x\n", 1114 rp->regspec_size, *vaddrp); 1115 #endif /* DDI_MAP_DEBUG */ 1116 return (DDI_SUCCESS); 1117 } 1118 1119 /* 1120 * Memory space 1121 */ 1122 1123 if (hp != NULL) { 1124 /* 1125 * hat layer ignores 1126 * hp->ah_acc.devacc_attr_endian_flags. 1127 */ 1128 switch (hp->ah_acc.devacc_attr_dataorder) { 1129 case DDI_STRICTORDER_ACC: 1130 hat_acc_flags = HAT_STRICTORDER; 1131 break; 1132 case DDI_UNORDERED_OK_ACC: 1133 hat_acc_flags = HAT_UNORDERED_OK; 1134 break; 1135 case DDI_MERGING_OK_ACC: 1136 hat_acc_flags = HAT_MERGING_OK; 1137 break; 1138 case DDI_LOADCACHING_OK_ACC: 1139 hat_acc_flags = HAT_LOADCACHING_OK; 1140 break; 1141 case DDI_STORECACHING_OK_ACC: 1142 hat_acc_flags = HAT_STORECACHING_OK; 1143 break; 1144 } 1145 ap = (ddi_acc_impl_t *)hp->ah_platform_private; 1146 ap->ahi_acc_attr |= DDI_ACCATTR_CPU_VADDR; 1147 impl_acc_hdl_init(hp); 1148 hp->ah_hat_flags = hat_acc_flags; 1149 } else { 1150 hat_acc_flags = HAT_STRICTORDER; 1151 } 1152 1153 rbase = (rootnex_addr_t)(rp->regspec_addr & MMU_PAGEMASK); 1154 #ifdef __xpv 1155 /* 1156 * If we're dom0, we're using a real device so we need to translate 1157 * the MA to a PA. 1158 */ 1159 if (DOMAIN_IS_INITDOMAIN(xen_info)) { 1160 pbase = pfn_to_pa(xen_assign_pfn(mmu_btop(rbase))); 1161 } else { 1162 pbase = rbase; 1163 } 1164 #else 1165 pbase = rbase; 1166 #endif 1167 pgoffset = (ulong_t)rp->regspec_addr & MMU_PAGEOFFSET; 1168 1169 if (rp->regspec_size == 0) { 1170 #ifdef DDI_MAP_DEBUG 1171 ddi_map_debug("rootnex_map_regspec: zero regspec_size\n"); 1172 #endif /* DDI_MAP_DEBUG */ 1173 return (DDI_ME_INVAL); 1174 } 1175 1176 if (mp->map_flags & DDI_MF_DEVICE_MAPPING) { 1177 /* extra cast to make gcc happy */ 1178 *vaddrp = (caddr_t)((uintptr_t)mmu_btop(pbase)); 1179 } else { 1180 npages = mmu_btopr(rp->regspec_size + pgoffset); 1181 1182 #ifdef DDI_MAP_DEBUG 1183 ddi_map_debug("rootnex_map_regspec: Mapping %d pages " 1184 "physical %llx", npages, pbase); 1185 #endif /* DDI_MAP_DEBUG */ 1186 1187 cvaddr = device_arena_alloc(ptob(npages), VM_NOSLEEP); 1188 if (cvaddr == NULL) 1189 return (DDI_ME_NORESOURCES); 1190 1191 /* 1192 * Now map in the pages we've allocated... 1193 */ 1194 hat_devload(kas.a_hat, cvaddr, mmu_ptob(npages), 1195 mmu_btop(pbase), mp->map_prot | hat_acc_flags, 1196 HAT_LOAD_LOCK); 1197 *vaddrp = (caddr_t)cvaddr + pgoffset; 1198 1199 /* save away pfn and npages for FMA */ 1200 hp = mp->map_handlep; 1201 if (hp) { 1202 hp->ah_pfn = mmu_btop(pbase); 1203 hp->ah_pnum = npages; 1204 } 1205 } 1206 1207 #ifdef DDI_MAP_DEBUG 1208 ddi_map_debug("at virtual 0x%x\n", *vaddrp); 1209 #endif /* DDI_MAP_DEBUG */ 1210 return (DDI_SUCCESS); 1211 } 1212 1213 1214 /* 1215 * rootnex_unmap_regspec() 1216 * 1217 */ 1218 static int 1219 rootnex_unmap_regspec(ddi_map_req_t *mp, caddr_t *vaddrp) 1220 { 1221 caddr_t addr = (caddr_t)*vaddrp; 1222 uint_t npages, pgoffset; 1223 struct regspec *rp; 1224 1225 if (mp->map_flags & DDI_MF_DEVICE_MAPPING) 1226 return (0); 1227 1228 rp = mp->map_obj.rp; 1229 1230 if (rp->regspec_size == 0) { 1231 #ifdef DDI_MAP_DEBUG 1232 ddi_map_debug("rootnex_unmap_regspec: zero regspec_size\n"); 1233 #endif /* DDI_MAP_DEBUG */ 1234 return (DDI_ME_INVAL); 1235 } 1236 1237 /* 1238 * I/O or memory mapping: 1239 * 1240 * <bustype=0, addr=x, len=x>: memory 1241 * <bustype=1, addr=x, len=x>: i/o 1242 * <bustype>1, addr=0, len=x>: x86-compatibility i/o 1243 */ 1244 if (rp->regspec_bustype != 0) { 1245 /* 1246 * This is I/O space, which requires no particular 1247 * processing on unmap since it isn't mapped in the 1248 * first place. 1249 */ 1250 return (DDI_SUCCESS); 1251 } 1252 1253 /* 1254 * Memory space 1255 */ 1256 pgoffset = (uintptr_t)addr & MMU_PAGEOFFSET; 1257 npages = mmu_btopr(rp->regspec_size + pgoffset); 1258 hat_unload(kas.a_hat, addr - pgoffset, ptob(npages), HAT_UNLOAD_UNLOCK); 1259 device_arena_free(addr - pgoffset, ptob(npages)); 1260 1261 /* 1262 * Destroy the pointer - the mapping has logically gone 1263 */ 1264 *vaddrp = NULL; 1265 1266 return (DDI_SUCCESS); 1267 } 1268 1269 1270 /* 1271 * rootnex_map_handle() 1272 * 1273 */ 1274 static int 1275 rootnex_map_handle(ddi_map_req_t *mp) 1276 { 1277 rootnex_addr_t rbase; 1278 ddi_acc_hdl_t *hp; 1279 uint_t pgoffset; 1280 struct regspec *rp; 1281 paddr_t pbase; 1282 1283 rp = mp->map_obj.rp; 1284 1285 #ifdef DDI_MAP_DEBUG 1286 ddi_map_debug( 1287 "rootnex_map_handle: <0x%x 0x%x 0x%x> handle 0x%x\n", 1288 rp->regspec_bustype, rp->regspec_addr, 1289 rp->regspec_size, mp->map_handlep); 1290 #endif /* DDI_MAP_DEBUG */ 1291 1292 /* 1293 * I/O or memory mapping: 1294 * 1295 * <bustype=0, addr=x, len=x>: memory 1296 * <bustype=1, addr=x, len=x>: i/o 1297 * <bustype>1, addr=0, len=x>: x86-compatibility i/o 1298 */ 1299 if (rp->regspec_bustype != 0) { 1300 /* 1301 * This refers to I/O space, and we don't support "mapping" 1302 * I/O space to a user. 1303 */ 1304 return (DDI_FAILURE); 1305 } 1306 1307 /* 1308 * Set up the hat_flags for the mapping. 1309 */ 1310 hp = mp->map_handlep; 1311 1312 switch (hp->ah_acc.devacc_attr_endian_flags) { 1313 case DDI_NEVERSWAP_ACC: 1314 hp->ah_hat_flags = HAT_NEVERSWAP | HAT_STRICTORDER; 1315 break; 1316 case DDI_STRUCTURE_LE_ACC: 1317 hp->ah_hat_flags = HAT_STRUCTURE_LE; 1318 break; 1319 case DDI_STRUCTURE_BE_ACC: 1320 return (DDI_FAILURE); 1321 default: 1322 return (DDI_REGS_ACC_CONFLICT); 1323 } 1324 1325 switch (hp->ah_acc.devacc_attr_dataorder) { 1326 case DDI_STRICTORDER_ACC: 1327 break; 1328 case DDI_UNORDERED_OK_ACC: 1329 hp->ah_hat_flags |= HAT_UNORDERED_OK; 1330 break; 1331 case DDI_MERGING_OK_ACC: 1332 hp->ah_hat_flags |= HAT_MERGING_OK; 1333 break; 1334 case DDI_LOADCACHING_OK_ACC: 1335 hp->ah_hat_flags |= HAT_LOADCACHING_OK; 1336 break; 1337 case DDI_STORECACHING_OK_ACC: 1338 hp->ah_hat_flags |= HAT_STORECACHING_OK; 1339 break; 1340 default: 1341 return (DDI_FAILURE); 1342 } 1343 1344 rbase = (rootnex_addr_t)rp->regspec_addr & 1345 (~(rootnex_addr_t)MMU_PAGEOFFSET); 1346 pgoffset = (ulong_t)rp->regspec_addr & MMU_PAGEOFFSET; 1347 1348 if (rp->regspec_size == 0) 1349 return (DDI_ME_INVAL); 1350 1351 #ifdef __xpv 1352 /* 1353 * If we're dom0, we're using a real device so we need to translate 1354 * the MA to a PA. 1355 */ 1356 if (DOMAIN_IS_INITDOMAIN(xen_info)) { 1357 pbase = pfn_to_pa(xen_assign_pfn(mmu_btop(rbase))) | 1358 (rbase & MMU_PAGEOFFSET); 1359 } else { 1360 pbase = rbase; 1361 } 1362 #else 1363 pbase = rbase; 1364 #endif 1365 1366 hp->ah_pfn = mmu_btop(pbase); 1367 hp->ah_pnum = mmu_btopr(rp->regspec_size + pgoffset); 1368 1369 return (DDI_SUCCESS); 1370 } 1371 1372 1373 1374 /* 1375 * ************************ 1376 * interrupt related code 1377 * ************************ 1378 */ 1379 1380 /* 1381 * rootnex_intr_ops() 1382 * bus_intr_op() function for interrupt support 1383 */ 1384 /* ARGSUSED */ 1385 static int 1386 rootnex_intr_ops(dev_info_t *pdip, dev_info_t *rdip, ddi_intr_op_t intr_op, 1387 ddi_intr_handle_impl_t *hdlp, void *result) 1388 { 1389 struct intrspec *ispec; 1390 1391 DDI_INTR_NEXDBG((CE_CONT, 1392 "rootnex_intr_ops: pdip = %p, rdip = %p, intr_op = %x, hdlp = %p\n", 1393 (void *)pdip, (void *)rdip, intr_op, (void *)hdlp)); 1394 1395 /* Process the interrupt operation */ 1396 switch (intr_op) { 1397 case DDI_INTROP_GETCAP: 1398 /* First check with pcplusmp */ 1399 if (psm_intr_ops == NULL) 1400 return (DDI_FAILURE); 1401 1402 if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_GET_CAP, result)) { 1403 *(int *)result = 0; 1404 return (DDI_FAILURE); 1405 } 1406 break; 1407 case DDI_INTROP_SETCAP: 1408 if (psm_intr_ops == NULL) 1409 return (DDI_FAILURE); 1410 1411 if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_SET_CAP, result)) 1412 return (DDI_FAILURE); 1413 break; 1414 case DDI_INTROP_ALLOC: 1415 ASSERT(hdlp->ih_type == DDI_INTR_TYPE_FIXED); 1416 return (rootnex_alloc_intr_fixed(rdip, hdlp, result)); 1417 case DDI_INTROP_FREE: 1418 ASSERT(hdlp->ih_type == DDI_INTR_TYPE_FIXED); 1419 return (rootnex_free_intr_fixed(rdip, hdlp)); 1420 case DDI_INTROP_GETPRI: 1421 if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) 1422 return (DDI_FAILURE); 1423 *(int *)result = ispec->intrspec_pri; 1424 break; 1425 case DDI_INTROP_SETPRI: 1426 /* Validate the interrupt priority passed to us */ 1427 if (*(int *)result > LOCK_LEVEL) 1428 return (DDI_FAILURE); 1429 1430 /* Ensure that PSM is all initialized and ispec is ok */ 1431 if ((psm_intr_ops == NULL) || 1432 ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL)) 1433 return (DDI_FAILURE); 1434 1435 /* Change the priority */ 1436 if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_SET_PRI, result) == 1437 PSM_FAILURE) 1438 return (DDI_FAILURE); 1439 1440 /* update the ispec with the new priority */ 1441 ispec->intrspec_pri = *(int *)result; 1442 break; 1443 case DDI_INTROP_ADDISR: 1444 if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) 1445 return (DDI_FAILURE); 1446 ispec->intrspec_func = hdlp->ih_cb_func; 1447 break; 1448 case DDI_INTROP_REMISR: 1449 if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) 1450 return (DDI_FAILURE); 1451 ispec->intrspec_func = (uint_t (*)()) 0; 1452 break; 1453 case DDI_INTROP_ENABLE: 1454 if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) 1455 return (DDI_FAILURE); 1456 1457 /* Call psmi to translate irq with the dip */ 1458 if (psm_intr_ops == NULL) 1459 return (DDI_FAILURE); 1460 1461 ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec; 1462 if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_XLATE_VECTOR, 1463 (int *)&hdlp->ih_vector) == PSM_FAILURE) 1464 return (DDI_FAILURE); 1465 1466 /* Add the interrupt handler */ 1467 if (!add_avintr((void *)hdlp, ispec->intrspec_pri, 1468 hdlp->ih_cb_func, DEVI(rdip)->devi_name, hdlp->ih_vector, 1469 hdlp->ih_cb_arg1, hdlp->ih_cb_arg2, NULL, rdip)) 1470 return (DDI_FAILURE); 1471 break; 1472 case DDI_INTROP_DISABLE: 1473 if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) 1474 return (DDI_FAILURE); 1475 1476 /* Call psm_ops() to translate irq with the dip */ 1477 if (psm_intr_ops == NULL) 1478 return (DDI_FAILURE); 1479 1480 ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec; 1481 (void) (*psm_intr_ops)(rdip, hdlp, 1482 PSM_INTR_OP_XLATE_VECTOR, (int *)&hdlp->ih_vector); 1483 1484 /* Remove the interrupt handler */ 1485 rem_avintr((void *)hdlp, ispec->intrspec_pri, 1486 hdlp->ih_cb_func, hdlp->ih_vector); 1487 break; 1488 case DDI_INTROP_SETMASK: 1489 if (psm_intr_ops == NULL) 1490 return (DDI_FAILURE); 1491 1492 if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_SET_MASK, NULL)) 1493 return (DDI_FAILURE); 1494 break; 1495 case DDI_INTROP_CLRMASK: 1496 if (psm_intr_ops == NULL) 1497 return (DDI_FAILURE); 1498 1499 if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_CLEAR_MASK, NULL)) 1500 return (DDI_FAILURE); 1501 break; 1502 case DDI_INTROP_GETPENDING: 1503 if (psm_intr_ops == NULL) 1504 return (DDI_FAILURE); 1505 1506 if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_GET_PENDING, 1507 result)) { 1508 *(int *)result = 0; 1509 return (DDI_FAILURE); 1510 } 1511 break; 1512 case DDI_INTROP_NAVAIL: 1513 case DDI_INTROP_NINTRS: 1514 *(int *)result = i_ddi_get_intx_nintrs(rdip); 1515 if (*(int *)result == 0) { 1516 /* 1517 * Special case for 'pcic' driver' only. This driver 1518 * driver is a child of 'isa' and 'rootnex' drivers. 1519 * 1520 * See detailed comments on this in the function 1521 * rootnex_get_ispec(). 1522 * 1523 * Children of 'pcic' send 'NINITR' request all the 1524 * way to rootnex driver. But, the 'pdp->par_nintr' 1525 * field may not initialized. So, we fake it here 1526 * to return 1 (a la what PCMCIA nexus does). 1527 */ 1528 if (strcmp(ddi_get_name(rdip), "pcic") == 0) 1529 *(int *)result = 1; 1530 else 1531 return (DDI_FAILURE); 1532 } 1533 break; 1534 case DDI_INTROP_SUPPORTED_TYPES: 1535 *(int *)result = DDI_INTR_TYPE_FIXED; /* Always ... */ 1536 break; 1537 default: 1538 return (DDI_FAILURE); 1539 } 1540 1541 return (DDI_SUCCESS); 1542 } 1543 1544 1545 /* 1546 * rootnex_get_ispec() 1547 * convert an interrupt number to an interrupt specification. 1548 * The interrupt number determines which interrupt spec will be 1549 * returned if more than one exists. 1550 * 1551 * Look into the parent private data area of the 'rdip' to find out 1552 * the interrupt specification. First check to make sure there is 1553 * one that matchs "inumber" and then return a pointer to it. 1554 * 1555 * Return NULL if one could not be found. 1556 * 1557 * NOTE: This is needed for rootnex_intr_ops() 1558 */ 1559 static struct intrspec * 1560 rootnex_get_ispec(dev_info_t *rdip, int inum) 1561 { 1562 struct ddi_parent_private_data *pdp = ddi_get_parent_data(rdip); 1563 1564 /* 1565 * Special case handling for drivers that provide their own 1566 * intrspec structures instead of relying on the DDI framework. 1567 * 1568 * A broken hardware driver in ON could potentially provide its 1569 * own intrspec structure, instead of relying on the hardware. 1570 * If these drivers are children of 'rootnex' then we need to 1571 * continue to provide backward compatibility to them here. 1572 * 1573 * Following check is a special case for 'pcic' driver which 1574 * was found to have broken hardwre andby provides its own intrspec. 1575 * 1576 * Verbatim comments from this driver are shown here: 1577 * "Don't use the ddi_add_intr since we don't have a 1578 * default intrspec in all cases." 1579 * 1580 * Since an 'ispec' may not be always created for it, 1581 * check for that and create one if so. 1582 * 1583 * NOTE: Currently 'pcic' is the only driver found to do this. 1584 */ 1585 if (!pdp->par_intr && strcmp(ddi_get_name(rdip), "pcic") == 0) { 1586 pdp->par_nintr = 1; 1587 pdp->par_intr = kmem_zalloc(sizeof (struct intrspec) * 1588 pdp->par_nintr, KM_SLEEP); 1589 } 1590 1591 /* Validate the interrupt number */ 1592 if (inum >= pdp->par_nintr) 1593 return (NULL); 1594 1595 /* Get the interrupt structure pointer and return that */ 1596 return ((struct intrspec *)&pdp->par_intr[inum]); 1597 } 1598 1599 /* 1600 * Allocate interrupt vector for FIXED (legacy) type. 1601 */ 1602 static int 1603 rootnex_alloc_intr_fixed(dev_info_t *rdip, ddi_intr_handle_impl_t *hdlp, 1604 void *result) 1605 { 1606 struct intrspec *ispec; 1607 ddi_intr_handle_impl_t info_hdl; 1608 int ret; 1609 int free_phdl = 0; 1610 apic_get_type_t type_info; 1611 1612 if (psm_intr_ops == NULL) 1613 return (DDI_FAILURE); 1614 1615 if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) 1616 return (DDI_FAILURE); 1617 1618 /* 1619 * If the PSM module is "APIX" then pass the request for it 1620 * to allocate the vector now. 1621 */ 1622 bzero(&info_hdl, sizeof (ddi_intr_handle_impl_t)); 1623 info_hdl.ih_private = &type_info; 1624 if ((*psm_intr_ops)(NULL, &info_hdl, PSM_INTR_OP_APIC_TYPE, NULL) == 1625 PSM_SUCCESS && strcmp(type_info.avgi_type, APIC_APIX_NAME) == 0) { 1626 if (hdlp->ih_private == NULL) { /* allocate phdl structure */ 1627 free_phdl = 1; 1628 i_ddi_alloc_intr_phdl(hdlp); 1629 } 1630 ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec; 1631 ret = (*psm_intr_ops)(rdip, hdlp, 1632 PSM_INTR_OP_ALLOC_VECTORS, result); 1633 if (free_phdl) { /* free up the phdl structure */ 1634 free_phdl = 0; 1635 i_ddi_free_intr_phdl(hdlp); 1636 hdlp->ih_private = NULL; 1637 } 1638 } else { 1639 /* 1640 * No APIX module; fall back to the old scheme where the 1641 * interrupt vector is allocated during ddi_enable_intr() call. 1642 */ 1643 hdlp->ih_pri = ispec->intrspec_pri; 1644 *(int *)result = hdlp->ih_scratch1; 1645 ret = DDI_SUCCESS; 1646 } 1647 1648 return (ret); 1649 } 1650 1651 /* 1652 * Free up interrupt vector for FIXED (legacy) type. 1653 */ 1654 static int 1655 rootnex_free_intr_fixed(dev_info_t *rdip, ddi_intr_handle_impl_t *hdlp) 1656 { 1657 struct intrspec *ispec; 1658 struct ddi_parent_private_data *pdp; 1659 ddi_intr_handle_impl_t info_hdl; 1660 int ret; 1661 apic_get_type_t type_info; 1662 1663 if (psm_intr_ops == NULL) 1664 return (DDI_FAILURE); 1665 1666 /* 1667 * If the PSM module is "APIX" then pass the request for it 1668 * to free up the vector now. 1669 */ 1670 bzero(&info_hdl, sizeof (ddi_intr_handle_impl_t)); 1671 info_hdl.ih_private = &type_info; 1672 if ((*psm_intr_ops)(NULL, &info_hdl, PSM_INTR_OP_APIC_TYPE, NULL) == 1673 PSM_SUCCESS && strcmp(type_info.avgi_type, APIC_APIX_NAME) == 0) { 1674 if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) 1675 return (DDI_FAILURE); 1676 ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec; 1677 ret = (*psm_intr_ops)(rdip, hdlp, 1678 PSM_INTR_OP_FREE_VECTORS, NULL); 1679 } else { 1680 /* 1681 * No APIX module; fall back to the old scheme where 1682 * the interrupt vector was already freed during 1683 * ddi_disable_intr() call. 1684 */ 1685 ret = DDI_SUCCESS; 1686 } 1687 1688 pdp = ddi_get_parent_data(rdip); 1689 1690 /* 1691 * Special case for 'pcic' driver' only. 1692 * If an intrspec was created for it, clean it up here 1693 * See detailed comments on this in the function 1694 * rootnex_get_ispec(). 1695 */ 1696 if (pdp->par_intr && strcmp(ddi_get_name(rdip), "pcic") == 0) { 1697 kmem_free(pdp->par_intr, sizeof (struct intrspec) * 1698 pdp->par_nintr); 1699 /* 1700 * Set it to zero; so that 1701 * DDI framework doesn't free it again 1702 */ 1703 pdp->par_intr = NULL; 1704 pdp->par_nintr = 0; 1705 } 1706 1707 return (ret); 1708 } 1709 1710 1711 /* 1712 * ****************** 1713 * dma related code 1714 * ****************** 1715 */ 1716 1717 /*ARGSUSED*/ 1718 static int 1719 rootnex_coredma_allochdl(dev_info_t *dip, dev_info_t *rdip, 1720 ddi_dma_attr_t *attr, int (*waitfp)(caddr_t), caddr_t arg, 1721 ddi_dma_handle_t *handlep) 1722 { 1723 uint64_t maxsegmentsize_ll; 1724 uint_t maxsegmentsize; 1725 ddi_dma_impl_t *hp; 1726 rootnex_dma_t *dma; 1727 uint64_t count_max; 1728 uint64_t seg; 1729 int kmflag; 1730 int e; 1731 1732 1733 /* convert our sleep flags */ 1734 if (waitfp == DDI_DMA_SLEEP) { 1735 kmflag = KM_SLEEP; 1736 } else { 1737 kmflag = KM_NOSLEEP; 1738 } 1739 1740 /* 1741 * We try to do only one memory allocation here. We'll do a little 1742 * pointer manipulation later. If the bind ends up taking more than 1743 * our prealloc's space, we'll have to allocate more memory in the 1744 * bind operation. Not great, but much better than before and the 1745 * best we can do with the current bind interfaces. 1746 */ 1747 hp = kmem_cache_alloc(rootnex_state->r_dmahdl_cache, kmflag); 1748 if (hp == NULL) 1749 return (DDI_DMA_NORESOURCES); 1750 1751 /* Do our pointer manipulation now, align the structures */ 1752 hp->dmai_private = (void *)(((uintptr_t)hp + 1753 (uintptr_t)sizeof (ddi_dma_impl_t) + 0x7) & ~0x7); 1754 dma = (rootnex_dma_t *)hp->dmai_private; 1755 dma->dp_prealloc_buffer = (uchar_t *)(((uintptr_t)dma + 1756 sizeof (rootnex_dma_t) + 0x7) & ~0x7); 1757 1758 /* setup the handle */ 1759 rootnex_clean_dmahdl(hp); 1760 hp->dmai_error.err_fep = NULL; 1761 hp->dmai_error.err_cf = NULL; 1762 dma->dp_dip = rdip; 1763 dma->dp_sglinfo.si_flags = attr->dma_attr_flags; 1764 dma->dp_sglinfo.si_min_addr = attr->dma_attr_addr_lo; 1765 1766 /* 1767 * The BOUNCE_ON_SEG workaround is not needed when an IOMMU 1768 * is being used. Set the upper limit to the seg value. 1769 * There will be enough DVMA space to always get addresses 1770 * that will match the constraints. 1771 */ 1772 if (IOMMU_USED(rdip) && 1773 (attr->dma_attr_flags & _DDI_DMA_BOUNCE_ON_SEG)) { 1774 dma->dp_sglinfo.si_max_addr = attr->dma_attr_seg; 1775 dma->dp_sglinfo.si_flags &= ~_DDI_DMA_BOUNCE_ON_SEG; 1776 } else 1777 dma->dp_sglinfo.si_max_addr = attr->dma_attr_addr_hi; 1778 1779 hp->dmai_minxfer = attr->dma_attr_minxfer; 1780 hp->dmai_burstsizes = attr->dma_attr_burstsizes; 1781 hp->dmai_rdip = rdip; 1782 hp->dmai_attr = *attr; 1783 1784 if (attr->dma_attr_seg >= dma->dp_sglinfo.si_max_addr) 1785 dma->dp_sglinfo.si_cancross = B_FALSE; 1786 else 1787 dma->dp_sglinfo.si_cancross = B_TRUE; 1788 1789 /* we don't need to worry about the SPL since we do a tryenter */ 1790 mutex_init(&dma->dp_mutex, NULL, MUTEX_DRIVER, NULL); 1791 1792 /* 1793 * Figure out our maximum segment size. If the segment size is greater 1794 * than 4G, we will limit it to (4G - 1) since the max size of a dma 1795 * object (ddi_dma_obj_t.dmao_size) is 32 bits. dma_attr_seg and 1796 * dma_attr_count_max are size-1 type values. 1797 * 1798 * Maximum segment size is the largest physically contiguous chunk of 1799 * memory that we can return from a bind (i.e. the maximum size of a 1800 * single cookie). 1801 */ 1802 1803 /* handle the rollover cases */ 1804 seg = attr->dma_attr_seg + 1; 1805 if (seg < attr->dma_attr_seg) { 1806 seg = attr->dma_attr_seg; 1807 } 1808 count_max = attr->dma_attr_count_max + 1; 1809 if (count_max < attr->dma_attr_count_max) { 1810 count_max = attr->dma_attr_count_max; 1811 } 1812 1813 /* 1814 * granularity may or may not be a power of two. If it isn't, we can't 1815 * use a simple mask. 1816 */ 1817 if (attr->dma_attr_granular & (attr->dma_attr_granular - 1)) { 1818 dma->dp_granularity_power_2 = B_FALSE; 1819 } else { 1820 dma->dp_granularity_power_2 = B_TRUE; 1821 } 1822 1823 /* 1824 * maxxfer should be a whole multiple of granularity. If we're going to 1825 * break up a window because we're greater than maxxfer, we might as 1826 * well make sure it's maxxfer is a whole multiple so we don't have to 1827 * worry about triming the window later on for this case. 1828 */ 1829 if (attr->dma_attr_granular > 1) { 1830 if (dma->dp_granularity_power_2) { 1831 dma->dp_maxxfer = attr->dma_attr_maxxfer - 1832 (attr->dma_attr_maxxfer & 1833 (attr->dma_attr_granular - 1)); 1834 } else { 1835 dma->dp_maxxfer = attr->dma_attr_maxxfer - 1836 (attr->dma_attr_maxxfer % attr->dma_attr_granular); 1837 } 1838 } else { 1839 dma->dp_maxxfer = attr->dma_attr_maxxfer; 1840 } 1841 1842 maxsegmentsize_ll = MIN(seg, dma->dp_maxxfer); 1843 maxsegmentsize_ll = MIN(maxsegmentsize_ll, count_max); 1844 if (maxsegmentsize_ll == 0 || (maxsegmentsize_ll > 0xFFFFFFFF)) { 1845 maxsegmentsize = 0xFFFFFFFF; 1846 } else { 1847 maxsegmentsize = maxsegmentsize_ll; 1848 } 1849 dma->dp_sglinfo.si_max_cookie_size = maxsegmentsize; 1850 dma->dp_sglinfo.si_segmask = attr->dma_attr_seg; 1851 1852 /* check the ddi_dma_attr arg to make sure it makes a little sense */ 1853 if (rootnex_alloc_check_parms) { 1854 e = rootnex_valid_alloc_parms(attr, maxsegmentsize); 1855 if (e != DDI_SUCCESS) { 1856 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_ALLOC_FAIL]); 1857 (void) rootnex_dma_freehdl(dip, rdip, 1858 (ddi_dma_handle_t)hp); 1859 return (e); 1860 } 1861 } 1862 1863 *handlep = (ddi_dma_handle_t)hp; 1864 1865 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_HDLS]); 1866 ROOTNEX_DPROBE1(rootnex__alloc__handle, uint64_t, 1867 rootnex_cnt[ROOTNEX_CNT_ACTIVE_HDLS]); 1868 1869 return (DDI_SUCCESS); 1870 } 1871 1872 1873 /* 1874 * rootnex_dma_allochdl() 1875 * called from ddi_dma_alloc_handle(). 1876 */ 1877 static int 1878 rootnex_dma_allochdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_attr_t *attr, 1879 int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *handlep) 1880 { 1881 int retval = DDI_SUCCESS; 1882 #if defined(__amd64) && !defined(__xpv) 1883 1884 if (IOMMU_UNITIALIZED(rdip)) { 1885 retval = iommulib_nex_open(dip, rdip); 1886 1887 if (retval != DDI_SUCCESS && retval != DDI_ENOTSUP) 1888 return (retval); 1889 } 1890 1891 if (IOMMU_UNUSED(rdip)) { 1892 retval = rootnex_coredma_allochdl(dip, rdip, attr, waitfp, arg, 1893 handlep); 1894 } else { 1895 retval = iommulib_nexdma_allochdl(dip, rdip, attr, 1896 waitfp, arg, handlep); 1897 } 1898 #else 1899 retval = rootnex_coredma_allochdl(dip, rdip, attr, waitfp, arg, 1900 handlep); 1901 #endif 1902 switch (retval) { 1903 case DDI_DMA_NORESOURCES: 1904 if (waitfp != DDI_DMA_DONTWAIT) { 1905 ddi_set_callback(waitfp, arg, 1906 &rootnex_state->r_dvma_call_list_id); 1907 } 1908 break; 1909 case DDI_SUCCESS: 1910 ndi_fmc_insert(rdip, DMA_HANDLE, *handlep, NULL); 1911 break; 1912 default: 1913 break; 1914 } 1915 return (retval); 1916 } 1917 1918 /*ARGSUSED*/ 1919 static int 1920 rootnex_coredma_freehdl(dev_info_t *dip, dev_info_t *rdip, 1921 ddi_dma_handle_t handle) 1922 { 1923 ddi_dma_impl_t *hp; 1924 rootnex_dma_t *dma; 1925 1926 1927 hp = (ddi_dma_impl_t *)handle; 1928 dma = (rootnex_dma_t *)hp->dmai_private; 1929 1930 /* unbind should have been called first */ 1931 ASSERT(!dma->dp_inuse); 1932 1933 mutex_destroy(&dma->dp_mutex); 1934 kmem_cache_free(rootnex_state->r_dmahdl_cache, hp); 1935 1936 ROOTNEX_DPROF_DEC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_HDLS]); 1937 ROOTNEX_DPROBE1(rootnex__free__handle, uint64_t, 1938 rootnex_cnt[ROOTNEX_CNT_ACTIVE_HDLS]); 1939 1940 return (DDI_SUCCESS); 1941 } 1942 1943 /* 1944 * rootnex_dma_freehdl() 1945 * called from ddi_dma_free_handle(). 1946 */ 1947 static int 1948 rootnex_dma_freehdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle) 1949 { 1950 int ret; 1951 1952 ndi_fmc_remove(rdip, DMA_HANDLE, handle); 1953 #if defined(__amd64) && !defined(__xpv) 1954 if (IOMMU_USED(rdip)) 1955 ret = iommulib_nexdma_freehdl(dip, rdip, handle); 1956 else 1957 #endif 1958 ret = rootnex_coredma_freehdl(dip, rdip, handle); 1959 1960 if (rootnex_state->r_dvma_call_list_id) 1961 ddi_run_callback(&rootnex_state->r_dvma_call_list_id); 1962 1963 return (ret); 1964 } 1965 1966 /*ARGSUSED*/ 1967 static int 1968 rootnex_coredma_bindhdl(dev_info_t *dip, dev_info_t *rdip, 1969 ddi_dma_handle_t handle, struct ddi_dma_req *dmareq, 1970 ddi_dma_cookie_t *cookiep, uint_t *ccountp) 1971 { 1972 rootnex_sglinfo_t *sinfo; 1973 ddi_dma_obj_t *dmao; 1974 #if defined(__amd64) && !defined(__xpv) 1975 struct dvmaseg *dvs; 1976 ddi_dma_cookie_t *cookie; 1977 #endif 1978 ddi_dma_attr_t *attr; 1979 ddi_dma_impl_t *hp; 1980 rootnex_dma_t *dma; 1981 int kmflag; 1982 int e; 1983 uint_t ncookies; 1984 1985 hp = (ddi_dma_impl_t *)handle; 1986 dma = (rootnex_dma_t *)hp->dmai_private; 1987 dmao = &dma->dp_dma; 1988 sinfo = &dma->dp_sglinfo; 1989 attr = &hp->dmai_attr; 1990 1991 /* convert the sleep flags */ 1992 if (dmareq->dmar_fp == DDI_DMA_SLEEP) { 1993 dma->dp_sleep_flags = kmflag = KM_SLEEP; 1994 } else { 1995 dma->dp_sleep_flags = kmflag = KM_NOSLEEP; 1996 } 1997 1998 hp->dmai_rflags = dmareq->dmar_flags & DMP_DDIFLAGS; 1999 2000 /* 2001 * This is useful for debugging a driver. Not as useful in a production 2002 * system. The only time this will fail is if you have a driver bug. 2003 */ 2004 if (rootnex_bind_check_inuse) { 2005 /* 2006 * No one else should ever have this lock unless someone else 2007 * is trying to use this handle. So contention on the lock 2008 * is the same as inuse being set. 2009 */ 2010 e = mutex_tryenter(&dma->dp_mutex); 2011 if (e == 0) { 2012 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); 2013 return (DDI_DMA_INUSE); 2014 } 2015 if (dma->dp_inuse) { 2016 mutex_exit(&dma->dp_mutex); 2017 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); 2018 return (DDI_DMA_INUSE); 2019 } 2020 dma->dp_inuse = B_TRUE; 2021 mutex_exit(&dma->dp_mutex); 2022 } 2023 2024 /* check the ddi_dma_attr arg to make sure it makes a little sense */ 2025 if (rootnex_bind_check_parms) { 2026 e = rootnex_valid_bind_parms(dmareq, attr); 2027 if (e != DDI_SUCCESS) { 2028 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); 2029 rootnex_clean_dmahdl(hp); 2030 return (e); 2031 } 2032 } 2033 2034 /* save away the original bind info */ 2035 dma->dp_dma = dmareq->dmar_object; 2036 2037 #if defined(__amd64) && !defined(__xpv) 2038 if (IOMMU_USED(rdip)) { 2039 dmao = &dma->dp_dvma; 2040 e = iommulib_nexdma_mapobject(dip, rdip, handle, dmareq, dmao); 2041 switch (e) { 2042 case DDI_SUCCESS: 2043 if (sinfo->si_cancross || 2044 dmao->dmao_obj.dvma_obj.dv_nseg != 1 || 2045 dmao->dmao_size > sinfo->si_max_cookie_size) { 2046 dma->dp_dvma_used = B_TRUE; 2047 break; 2048 } 2049 sinfo->si_sgl_size = 1; 2050 hp->dmai_rflags |= DMP_NOSYNC; 2051 2052 dma->dp_dvma_used = B_TRUE; 2053 dma->dp_need_to_free_cookie = B_FALSE; 2054 2055 dvs = &dmao->dmao_obj.dvma_obj.dv_seg[0]; 2056 cookie = hp->dmai_cookie = dma->dp_cookies = 2057 (ddi_dma_cookie_t *)dma->dp_prealloc_buffer; 2058 cookie->dmac_laddress = dvs->dvs_start + 2059 dmao->dmao_obj.dvma_obj.dv_off; 2060 cookie->dmac_size = dvs->dvs_len; 2061 cookie->dmac_type = 0; 2062 2063 ROOTNEX_DPROBE1(rootnex__bind__dvmafast, dev_info_t *, 2064 rdip); 2065 goto fast; 2066 case DDI_ENOTSUP: 2067 break; 2068 default: 2069 rootnex_clean_dmahdl(hp); 2070 return (e); 2071 } 2072 } 2073 #endif 2074 2075 /* 2076 * Figure out a rough estimate of what maximum number of pages 2077 * this buffer could use (a high estimate of course). 2078 */ 2079 sinfo->si_max_pages = mmu_btopr(dma->dp_dma.dmao_size) + 1; 2080 2081 if (dma->dp_dvma_used) { 2082 /* 2083 * The number of physical pages is the worst case. 2084 * 2085 * For DVMA, the worst case is the length divided 2086 * by the maximum cookie length, plus 1. Add to that 2087 * the number of segment boundaries potentially crossed, and 2088 * the additional number of DVMA segments that was returned. 2089 * 2090 * In the normal case, for modern devices, si_cancross will 2091 * be false, and dv_nseg will be 1, and the fast path will 2092 * have been taken above. 2093 */ 2094 ncookies = (dma->dp_dma.dmao_size / sinfo->si_max_cookie_size) 2095 + 1; 2096 if (sinfo->si_cancross) 2097 ncookies += 2098 (dma->dp_dma.dmao_size / attr->dma_attr_seg) + 1; 2099 ncookies += (dmao->dmao_obj.dvma_obj.dv_nseg - 1); 2100 2101 sinfo->si_max_pages = MIN(sinfo->si_max_pages, ncookies); 2102 } 2103 2104 /* 2105 * We'll use the pre-allocated cookies for any bind that will *always* 2106 * fit (more important to be consistent, we don't want to create 2107 * additional degenerate cases). 2108 */ 2109 if (sinfo->si_max_pages <= rootnex_state->r_prealloc_cookies) { 2110 dma->dp_cookies = (ddi_dma_cookie_t *)dma->dp_prealloc_buffer; 2111 dma->dp_need_to_free_cookie = B_FALSE; 2112 ROOTNEX_DPROBE2(rootnex__bind__prealloc, dev_info_t *, rdip, 2113 uint_t, sinfo->si_max_pages); 2114 2115 /* 2116 * For anything larger than that, we'll go ahead and allocate the 2117 * maximum number of pages we expect to see. Hopefuly, we won't be 2118 * seeing this path in the fast path for high performance devices very 2119 * frequently. 2120 * 2121 * a ddi bind interface that allowed the driver to provide storage to 2122 * the bind interface would speed this case up. 2123 */ 2124 } else { 2125 /* 2126 * Save away how much memory we allocated. If we're doing a 2127 * nosleep, the alloc could fail... 2128 */ 2129 dma->dp_cookie_size = sinfo->si_max_pages * 2130 sizeof (ddi_dma_cookie_t); 2131 dma->dp_cookies = kmem_alloc(dma->dp_cookie_size, kmflag); 2132 if (dma->dp_cookies == NULL) { 2133 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); 2134 rootnex_clean_dmahdl(hp); 2135 return (DDI_DMA_NORESOURCES); 2136 } 2137 dma->dp_need_to_free_cookie = B_TRUE; 2138 ROOTNEX_DPROBE2(rootnex__bind__alloc, dev_info_t *, rdip, 2139 uint_t, sinfo->si_max_pages); 2140 } 2141 hp->dmai_cookie = dma->dp_cookies; 2142 2143 /* 2144 * Get the real sgl. rootnex_get_sgl will fill in cookie array while 2145 * looking at the constraints in the dma structure. It will then put 2146 * some additional state about the sgl in the dma struct (i.e. is 2147 * the sgl clean, or do we need to do some munging; how many pages 2148 * need to be copied, etc.) 2149 */ 2150 if (dma->dp_dvma_used) 2151 rootnex_dvma_get_sgl(dmao, dma->dp_cookies, &dma->dp_sglinfo); 2152 else 2153 rootnex_get_sgl(dmao, dma->dp_cookies, &dma->dp_sglinfo); 2154 2155 out: 2156 ASSERT(sinfo->si_sgl_size <= sinfo->si_max_pages); 2157 /* if we don't need a copy buffer, we don't need to sync */ 2158 if (sinfo->si_copybuf_req == 0) { 2159 hp->dmai_rflags |= DMP_NOSYNC; 2160 } 2161 2162 /* 2163 * if we don't need the copybuf and we don't need to do a partial, we 2164 * hit the fast path. All the high performance devices should be trying 2165 * to hit this path. To hit this path, a device should be able to reach 2166 * all of memory, shouldn't try to bind more than it can transfer, and 2167 * the buffer shouldn't require more cookies than the driver/device can 2168 * handle [sgllen]). 2169 */ 2170 if ((sinfo->si_copybuf_req == 0) && 2171 (sinfo->si_sgl_size <= attr->dma_attr_sgllen) && 2172 (dmao->dmao_size < dma->dp_maxxfer)) { 2173 fast: 2174 /* 2175 * If the driver supports FMA, insert the handle in the FMA DMA 2176 * handle cache. 2177 */ 2178 if (attr->dma_attr_flags & DDI_DMA_FLAGERR) 2179 hp->dmai_error.err_cf = rootnex_dma_check; 2180 2181 /* 2182 * copy out the first cookie and ccountp, set the cookie 2183 * pointer to the second cookie. The first cookie is passed 2184 * back on the stack. Additional cookies are accessed via 2185 * ddi_dma_nextcookie() 2186 */ 2187 *cookiep = dma->dp_cookies[0]; 2188 *ccountp = sinfo->si_sgl_size; 2189 hp->dmai_cookie++; 2190 hp->dmai_rflags &= ~DDI_DMA_PARTIAL; 2191 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS]); 2192 ROOTNEX_DPROBE4(rootnex__bind__fast, dev_info_t *, rdip, 2193 uint64_t, rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS], 2194 uint_t, dmao->dmao_size, uint_t, *ccountp); 2195 2196 2197 return (DDI_DMA_MAPPED); 2198 } 2199 2200 /* 2201 * go to the slow path, we may need to alloc more memory, create 2202 * multiple windows, and munge up a sgl to make the device happy. 2203 */ 2204 2205 /* 2206 * With the IOMMU mapobject method used, we should never hit 2207 * the slow path. If we do, something is seriously wrong. 2208 * Clean up and return an error. 2209 */ 2210 2211 #if defined(__amd64) && !defined(__xpv) 2212 2213 if (dma->dp_dvma_used) { 2214 (void) iommulib_nexdma_unmapobject(dip, rdip, handle, 2215 &dma->dp_dvma); 2216 e = DDI_DMA_NOMAPPING; 2217 } else { 2218 #endif 2219 e = rootnex_bind_slowpath(hp, dmareq, dma, attr, &dma->dp_dma, 2220 kmflag); 2221 #if defined(__amd64) && !defined(__xpv) 2222 } 2223 #endif 2224 if ((e != DDI_DMA_MAPPED) && (e != DDI_DMA_PARTIAL_MAP)) { 2225 if (dma->dp_need_to_free_cookie) { 2226 kmem_free(dma->dp_cookies, dma->dp_cookie_size); 2227 } 2228 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); 2229 rootnex_clean_dmahdl(hp); /* must be after free cookie */ 2230 return (e); 2231 } 2232 2233 /* 2234 * If the driver supports FMA, insert the handle in the FMA DMA handle 2235 * cache. 2236 */ 2237 if (attr->dma_attr_flags & DDI_DMA_FLAGERR) 2238 hp->dmai_error.err_cf = rootnex_dma_check; 2239 2240 /* if the first window uses the copy buffer, sync it for the device */ 2241 if ((dma->dp_window[dma->dp_current_win].wd_dosync) && 2242 (hp->dmai_rflags & DDI_DMA_WRITE)) { 2243 (void) rootnex_coredma_sync(dip, rdip, handle, 0, 0, 2244 DDI_DMA_SYNC_FORDEV); 2245 } 2246 2247 /* 2248 * copy out the first cookie and ccountp, set the cookie pointer to the 2249 * second cookie. Make sure the partial flag is set/cleared correctly. 2250 * If we have a partial map (i.e. multiple windows), the number of 2251 * cookies we return is the number of cookies in the first window. 2252 */ 2253 if (e == DDI_DMA_MAPPED) { 2254 hp->dmai_rflags &= ~DDI_DMA_PARTIAL; 2255 *ccountp = sinfo->si_sgl_size; 2256 hp->dmai_nwin = 1; 2257 } else { 2258 hp->dmai_rflags |= DDI_DMA_PARTIAL; 2259 *ccountp = dma->dp_window[dma->dp_current_win].wd_cookie_cnt; 2260 ASSERT(hp->dmai_nwin <= dma->dp_max_win); 2261 } 2262 *cookiep = dma->dp_cookies[0]; 2263 hp->dmai_cookie++; 2264 2265 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS]); 2266 ROOTNEX_DPROBE4(rootnex__bind__slow, dev_info_t *, rdip, uint64_t, 2267 rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS], uint_t, 2268 dmao->dmao_size, uint_t, *ccountp); 2269 return (e); 2270 } 2271 2272 /* 2273 * rootnex_dma_bindhdl() 2274 * called from ddi_dma_addr_bind_handle() and ddi_dma_buf_bind_handle(). 2275 */ 2276 static int 2277 rootnex_dma_bindhdl(dev_info_t *dip, dev_info_t *rdip, 2278 ddi_dma_handle_t handle, struct ddi_dma_req *dmareq, 2279 ddi_dma_cookie_t *cookiep, uint_t *ccountp) 2280 { 2281 int ret; 2282 #if defined(__amd64) && !defined(__xpv) 2283 if (IOMMU_USED(rdip)) 2284 ret = iommulib_nexdma_bindhdl(dip, rdip, handle, dmareq, 2285 cookiep, ccountp); 2286 else 2287 #endif 2288 ret = rootnex_coredma_bindhdl(dip, rdip, handle, dmareq, 2289 cookiep, ccountp); 2290 2291 if (ret == DDI_DMA_NORESOURCES && dmareq->dmar_fp != DDI_DMA_DONTWAIT) { 2292 ddi_set_callback(dmareq->dmar_fp, dmareq->dmar_arg, 2293 &rootnex_state->r_dvma_call_list_id); 2294 } 2295 2296 return (ret); 2297 } 2298 2299 2300 2301 /*ARGSUSED*/ 2302 static int 2303 rootnex_coredma_unbindhdl(dev_info_t *dip, dev_info_t *rdip, 2304 ddi_dma_handle_t handle) 2305 { 2306 ddi_dma_impl_t *hp; 2307 rootnex_dma_t *dma; 2308 int e; 2309 2310 hp = (ddi_dma_impl_t *)handle; 2311 dma = (rootnex_dma_t *)hp->dmai_private; 2312 2313 /* make sure the buffer wasn't free'd before calling unbind */ 2314 if (rootnex_unbind_verify_buffer) { 2315 e = rootnex_verify_buffer(dma); 2316 if (e != DDI_SUCCESS) { 2317 ASSERT(0); 2318 return (DDI_FAILURE); 2319 } 2320 } 2321 2322 /* sync the current window before unbinding the buffer */ 2323 if (dma->dp_window && dma->dp_window[dma->dp_current_win].wd_dosync && 2324 (hp->dmai_rflags & DDI_DMA_READ)) { 2325 (void) rootnex_coredma_sync(dip, rdip, handle, 0, 0, 2326 DDI_DMA_SYNC_FORCPU); 2327 } 2328 2329 /* 2330 * cleanup and copy buffer or window state. if we didn't use the copy 2331 * buffer or windows, there won't be much to do :-) 2332 */ 2333 rootnex_teardown_copybuf(dma); 2334 rootnex_teardown_windows(dma); 2335 2336 #if defined(__amd64) && !defined(__xpv) 2337 if (IOMMU_USED(rdip)) 2338 (void) iommulib_nexdma_unmapobject(dip, rdip, handle, 2339 &dma->dp_dvma); 2340 #endif 2341 2342 /* 2343 * If we had to allocate space to for the worse case sgl (it didn't 2344 * fit into our pre-allocate buffer), free that up now 2345 */ 2346 if (dma->dp_need_to_free_cookie) { 2347 kmem_free(dma->dp_cookies, dma->dp_cookie_size); 2348 } 2349 2350 /* 2351 * clean up the handle so it's ready for the next bind (i.e. if the 2352 * handle is reused). 2353 */ 2354 rootnex_clean_dmahdl(hp); 2355 hp->dmai_error.err_cf = NULL; 2356 2357 ROOTNEX_DPROF_DEC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS]); 2358 ROOTNEX_DPROBE1(rootnex__unbind, uint64_t, 2359 rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS]); 2360 2361 return (DDI_SUCCESS); 2362 } 2363 2364 /* 2365 * rootnex_dma_unbindhdl() 2366 * called from ddi_dma_unbind_handle() 2367 */ 2368 /*ARGSUSED*/ 2369 static int 2370 rootnex_dma_unbindhdl(dev_info_t *dip, dev_info_t *rdip, 2371 ddi_dma_handle_t handle) 2372 { 2373 int ret; 2374 2375 #if defined(__amd64) && !defined(__xpv) 2376 if (IOMMU_USED(rdip)) 2377 ret = iommulib_nexdma_unbindhdl(dip, rdip, handle); 2378 else 2379 #endif 2380 ret = rootnex_coredma_unbindhdl(dip, rdip, handle); 2381 2382 if (rootnex_state->r_dvma_call_list_id) 2383 ddi_run_callback(&rootnex_state->r_dvma_call_list_id); 2384 2385 return (ret); 2386 } 2387 2388 #if defined(__amd64) && !defined(__xpv) 2389 2390 static int 2391 rootnex_coredma_get_sleep_flags(ddi_dma_handle_t handle) 2392 { 2393 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 2394 rootnex_dma_t *dma = (rootnex_dma_t *)hp->dmai_private; 2395 2396 if (dma->dp_sleep_flags != KM_SLEEP && 2397 dma->dp_sleep_flags != KM_NOSLEEP) 2398 cmn_err(CE_PANIC, "kmem sleep flags not set in DMA handle"); 2399 return (dma->dp_sleep_flags); 2400 } 2401 /*ARGSUSED*/ 2402 static void 2403 rootnex_coredma_reset_cookies(dev_info_t *dip, ddi_dma_handle_t handle) 2404 { 2405 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 2406 rootnex_dma_t *dma = (rootnex_dma_t *)hp->dmai_private; 2407 rootnex_window_t *window; 2408 2409 if (dma->dp_window) { 2410 window = &dma->dp_window[dma->dp_current_win]; 2411 hp->dmai_cookie = window->wd_first_cookie; 2412 } else { 2413 hp->dmai_cookie = dma->dp_cookies; 2414 } 2415 hp->dmai_cookie++; 2416 } 2417 2418 /*ARGSUSED*/ 2419 static int 2420 rootnex_coredma_get_cookies(dev_info_t *dip, ddi_dma_handle_t handle, 2421 ddi_dma_cookie_t **cookiepp, uint_t *ccountp) 2422 { 2423 int i; 2424 int km_flags; 2425 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 2426 rootnex_dma_t *dma = (rootnex_dma_t *)hp->dmai_private; 2427 rootnex_window_t *window; 2428 ddi_dma_cookie_t *cp; 2429 ddi_dma_cookie_t *cookie; 2430 2431 ASSERT(*cookiepp == NULL); 2432 ASSERT(*ccountp == 0); 2433 2434 if (dma->dp_window) { 2435 window = &dma->dp_window[dma->dp_current_win]; 2436 cp = window->wd_first_cookie; 2437 *ccountp = window->wd_cookie_cnt; 2438 } else { 2439 cp = dma->dp_cookies; 2440 *ccountp = dma->dp_sglinfo.si_sgl_size; 2441 } 2442 2443 km_flags = rootnex_coredma_get_sleep_flags(handle); 2444 cookie = kmem_zalloc(sizeof (ddi_dma_cookie_t) * (*ccountp), km_flags); 2445 if (cookie == NULL) { 2446 return (DDI_DMA_NORESOURCES); 2447 } 2448 2449 for (i = 0; i < *ccountp; i++) { 2450 cookie[i].dmac_notused = cp[i].dmac_notused; 2451 cookie[i].dmac_type = cp[i].dmac_type; 2452 cookie[i].dmac_address = cp[i].dmac_address; 2453 cookie[i].dmac_size = cp[i].dmac_size; 2454 } 2455 2456 *cookiepp = cookie; 2457 2458 return (DDI_SUCCESS); 2459 } 2460 2461 /*ARGSUSED*/ 2462 static int 2463 rootnex_coredma_set_cookies(dev_info_t *dip, ddi_dma_handle_t handle, 2464 ddi_dma_cookie_t *cookiep, uint_t ccount) 2465 { 2466 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 2467 rootnex_dma_t *dma = (rootnex_dma_t *)hp->dmai_private; 2468 rootnex_window_t *window; 2469 ddi_dma_cookie_t *cur_cookiep; 2470 2471 ASSERT(cookiep); 2472 ASSERT(ccount != 0); 2473 ASSERT(dma->dp_need_to_switch_cookies == B_FALSE); 2474 2475 if (dma->dp_window) { 2476 window = &dma->dp_window[dma->dp_current_win]; 2477 dma->dp_saved_cookies = window->wd_first_cookie; 2478 window->wd_first_cookie = cookiep; 2479 ASSERT(ccount == window->wd_cookie_cnt); 2480 cur_cookiep = (hp->dmai_cookie - dma->dp_saved_cookies) 2481 + window->wd_first_cookie; 2482 } else { 2483 dma->dp_saved_cookies = dma->dp_cookies; 2484 dma->dp_cookies = cookiep; 2485 ASSERT(ccount == dma->dp_sglinfo.si_sgl_size); 2486 cur_cookiep = (hp->dmai_cookie - dma->dp_saved_cookies) 2487 + dma->dp_cookies; 2488 } 2489 2490 dma->dp_need_to_switch_cookies = B_TRUE; 2491 hp->dmai_cookie = cur_cookiep; 2492 2493 return (DDI_SUCCESS); 2494 } 2495 2496 /*ARGSUSED*/ 2497 static int 2498 rootnex_coredma_clear_cookies(dev_info_t *dip, ddi_dma_handle_t handle) 2499 { 2500 ddi_dma_impl_t *hp = (ddi_dma_impl_t *)handle; 2501 rootnex_dma_t *dma = (rootnex_dma_t *)hp->dmai_private; 2502 rootnex_window_t *window; 2503 ddi_dma_cookie_t *cur_cookiep; 2504 ddi_dma_cookie_t *cookie_array; 2505 uint_t ccount; 2506 2507 /* check if cookies have not been switched */ 2508 if (dma->dp_need_to_switch_cookies == B_FALSE) 2509 return (DDI_SUCCESS); 2510 2511 ASSERT(dma->dp_saved_cookies); 2512 2513 if (dma->dp_window) { 2514 window = &dma->dp_window[dma->dp_current_win]; 2515 cookie_array = window->wd_first_cookie; 2516 window->wd_first_cookie = dma->dp_saved_cookies; 2517 dma->dp_saved_cookies = NULL; 2518 ccount = window->wd_cookie_cnt; 2519 cur_cookiep = (hp->dmai_cookie - cookie_array) 2520 + window->wd_first_cookie; 2521 } else { 2522 cookie_array = dma->dp_cookies; 2523 dma->dp_cookies = dma->dp_saved_cookies; 2524 dma->dp_saved_cookies = NULL; 2525 ccount = dma->dp_sglinfo.si_sgl_size; 2526 cur_cookiep = (hp->dmai_cookie - cookie_array) 2527 + dma->dp_cookies; 2528 } 2529 2530 kmem_free(cookie_array, sizeof (ddi_dma_cookie_t) * ccount); 2531 2532 hp->dmai_cookie = cur_cookiep; 2533 2534 dma->dp_need_to_switch_cookies = B_FALSE; 2535 2536 return (DDI_SUCCESS); 2537 } 2538 2539 #endif 2540 2541 static struct as * 2542 rootnex_get_as(ddi_dma_obj_t *dmao) 2543 { 2544 struct as *asp; 2545 2546 switch (dmao->dmao_type) { 2547 case DMA_OTYP_VADDR: 2548 case DMA_OTYP_BUFVADDR: 2549 asp = dmao->dmao_obj.virt_obj.v_as; 2550 if (asp == NULL) 2551 asp = &kas; 2552 break; 2553 default: 2554 asp = NULL; 2555 break; 2556 } 2557 return (asp); 2558 } 2559 2560 /* 2561 * rootnex_verify_buffer() 2562 * verify buffer wasn't free'd 2563 */ 2564 static int 2565 rootnex_verify_buffer(rootnex_dma_t *dma) 2566 { 2567 page_t **pplist; 2568 caddr_t vaddr; 2569 uint_t pcnt; 2570 uint_t poff; 2571 page_t *pp; 2572 char b; 2573 int i; 2574 2575 /* Figure out how many pages this buffer occupies */ 2576 if (dma->dp_dma.dmao_type == DMA_OTYP_PAGES) { 2577 poff = dma->dp_dma.dmao_obj.pp_obj.pp_offset & MMU_PAGEOFFSET; 2578 } else { 2579 vaddr = dma->dp_dma.dmao_obj.virt_obj.v_addr; 2580 poff = (uintptr_t)vaddr & MMU_PAGEOFFSET; 2581 } 2582 pcnt = mmu_btopr(dma->dp_dma.dmao_size + poff); 2583 2584 switch (dma->dp_dma.dmao_type) { 2585 case DMA_OTYP_PAGES: 2586 /* 2587 * for a linked list of pp's walk through them to make sure 2588 * they're locked and not free. 2589 */ 2590 pp = dma->dp_dma.dmao_obj.pp_obj.pp_pp; 2591 for (i = 0; i < pcnt; i++) { 2592 if (PP_ISFREE(pp) || !PAGE_LOCKED(pp)) { 2593 return (DDI_FAILURE); 2594 } 2595 pp = pp->p_next; 2596 } 2597 break; 2598 2599 case DMA_OTYP_VADDR: 2600 case DMA_OTYP_BUFVADDR: 2601 pplist = dma->dp_dma.dmao_obj.virt_obj.v_priv; 2602 /* 2603 * for an array of pp's walk through them to make sure they're 2604 * not free. It's possible that they may not be locked. 2605 */ 2606 if (pplist) { 2607 for (i = 0; i < pcnt; i++) { 2608 if (PP_ISFREE(pplist[i])) { 2609 return (DDI_FAILURE); 2610 } 2611 } 2612 2613 /* For a virtual address, try to peek at each page */ 2614 } else { 2615 if (rootnex_get_as(&dma->dp_dma) == &kas) { 2616 for (i = 0; i < pcnt; i++) { 2617 if (ddi_peek8(NULL, vaddr, &b) == 2618 DDI_FAILURE) 2619 return (DDI_FAILURE); 2620 vaddr += MMU_PAGESIZE; 2621 } 2622 } 2623 } 2624 break; 2625 2626 default: 2627 cmn_err(CE_PANIC, "rootnex_verify_buffer: bad DMA object"); 2628 break; 2629 } 2630 2631 return (DDI_SUCCESS); 2632 } 2633 2634 2635 /* 2636 * rootnex_clean_dmahdl() 2637 * Clean the dma handle. This should be called on a handle alloc and an 2638 * unbind handle. Set the handle state to the default settings. 2639 */ 2640 static void 2641 rootnex_clean_dmahdl(ddi_dma_impl_t *hp) 2642 { 2643 rootnex_dma_t *dma; 2644 2645 2646 dma = (rootnex_dma_t *)hp->dmai_private; 2647 2648 hp->dmai_nwin = 0; 2649 dma->dp_current_cookie = 0; 2650 dma->dp_copybuf_size = 0; 2651 dma->dp_window = NULL; 2652 dma->dp_cbaddr = NULL; 2653 dma->dp_inuse = B_FALSE; 2654 dma->dp_dvma_used = B_FALSE; 2655 dma->dp_need_to_free_cookie = B_FALSE; 2656 dma->dp_need_to_switch_cookies = B_FALSE; 2657 dma->dp_saved_cookies = NULL; 2658 dma->dp_sleep_flags = KM_PANIC; 2659 dma->dp_need_to_free_window = B_FALSE; 2660 dma->dp_partial_required = B_FALSE; 2661 dma->dp_trim_required = B_FALSE; 2662 dma->dp_sglinfo.si_copybuf_req = 0; 2663 #if !defined(__amd64) 2664 dma->dp_cb_remaping = B_FALSE; 2665 dma->dp_kva = NULL; 2666 #endif 2667 2668 /* FMA related initialization */ 2669 hp->dmai_fault = 0; 2670 hp->dmai_fault_check = NULL; 2671 hp->dmai_fault_notify = NULL; 2672 hp->dmai_error.err_ena = 0; 2673 hp->dmai_error.err_status = DDI_FM_OK; 2674 hp->dmai_error.err_expected = DDI_FM_ERR_UNEXPECTED; 2675 hp->dmai_error.err_ontrap = NULL; 2676 } 2677 2678 2679 /* 2680 * rootnex_valid_alloc_parms() 2681 * Called in ddi_dma_alloc_handle path to validate its parameters. 2682 */ 2683 static int 2684 rootnex_valid_alloc_parms(ddi_dma_attr_t *attr, uint_t maxsegmentsize) 2685 { 2686 if ((attr->dma_attr_seg < MMU_PAGEOFFSET) || 2687 (attr->dma_attr_count_max < MMU_PAGEOFFSET) || 2688 (attr->dma_attr_granular > MMU_PAGESIZE) || 2689 (attr->dma_attr_maxxfer < MMU_PAGESIZE)) { 2690 return (DDI_DMA_BADATTR); 2691 } 2692 2693 if (attr->dma_attr_addr_hi <= attr->dma_attr_addr_lo) { 2694 return (DDI_DMA_BADATTR); 2695 } 2696 2697 if ((attr->dma_attr_seg & MMU_PAGEOFFSET) != MMU_PAGEOFFSET || 2698 MMU_PAGESIZE & (attr->dma_attr_granular - 1) || 2699 attr->dma_attr_sgllen <= 0) { 2700 return (DDI_DMA_BADATTR); 2701 } 2702 2703 /* We should be able to DMA into every byte offset in a page */ 2704 if (maxsegmentsize < MMU_PAGESIZE) { 2705 return (DDI_DMA_BADATTR); 2706 } 2707 2708 /* if we're bouncing on seg, seg must be <= addr_hi */ 2709 if ((attr->dma_attr_flags & _DDI_DMA_BOUNCE_ON_SEG) && 2710 (attr->dma_attr_seg > attr->dma_attr_addr_hi)) { 2711 return (DDI_DMA_BADATTR); 2712 } 2713 return (DDI_SUCCESS); 2714 } 2715 2716 /* 2717 * rootnex_valid_bind_parms() 2718 * Called in ddi_dma_*_bind_handle path to validate its parameters. 2719 */ 2720 /* ARGSUSED */ 2721 static int 2722 rootnex_valid_bind_parms(ddi_dma_req_t *dmareq, ddi_dma_attr_t *attr) 2723 { 2724 #if !defined(__amd64) 2725 /* 2726 * we only support up to a 2G-1 transfer size on 32-bit kernels so 2727 * we can track the offset for the obsoleted interfaces. 2728 */ 2729 if (dmareq->dmar_object.dmao_size > 0x7FFFFFFF) { 2730 return (DDI_DMA_TOOBIG); 2731 } 2732 #endif 2733 2734 return (DDI_SUCCESS); 2735 } 2736 2737 2738 /* 2739 * rootnex_need_bounce_seg() 2740 * check to see if the buffer lives on both side of the seg. 2741 */ 2742 static boolean_t 2743 rootnex_need_bounce_seg(ddi_dma_obj_t *dmar_object, rootnex_sglinfo_t *sglinfo) 2744 { 2745 ddi_dma_atyp_t buftype; 2746 rootnex_addr_t raddr; 2747 boolean_t lower_addr; 2748 boolean_t upper_addr; 2749 uint64_t offset; 2750 page_t **pplist; 2751 uint64_t paddr; 2752 uint32_t psize; 2753 uint32_t size; 2754 caddr_t vaddr; 2755 uint_t pcnt; 2756 page_t *pp; 2757 2758 2759 /* shortcuts */ 2760 pplist = dmar_object->dmao_obj.virt_obj.v_priv; 2761 vaddr = dmar_object->dmao_obj.virt_obj.v_addr; 2762 buftype = dmar_object->dmao_type; 2763 size = dmar_object->dmao_size; 2764 2765 lower_addr = B_FALSE; 2766 upper_addr = B_FALSE; 2767 pcnt = 0; 2768 2769 /* 2770 * Process the first page to handle the initial offset of the buffer. 2771 * We'll use the base address we get later when we loop through all 2772 * the pages. 2773 */ 2774 if (buftype == DMA_OTYP_PAGES) { 2775 pp = dmar_object->dmao_obj.pp_obj.pp_pp; 2776 offset = dmar_object->dmao_obj.pp_obj.pp_offset & 2777 MMU_PAGEOFFSET; 2778 paddr = pfn_to_pa(pp->p_pagenum) + offset; 2779 psize = MIN(size, (MMU_PAGESIZE - offset)); 2780 pp = pp->p_next; 2781 sglinfo->si_asp = NULL; 2782 } else if (pplist != NULL) { 2783 offset = (uintptr_t)vaddr & MMU_PAGEOFFSET; 2784 sglinfo->si_asp = dmar_object->dmao_obj.virt_obj.v_as; 2785 if (sglinfo->si_asp == NULL) { 2786 sglinfo->si_asp = &kas; 2787 } 2788 paddr = pfn_to_pa(pplist[pcnt]->p_pagenum); 2789 paddr += offset; 2790 psize = MIN(size, (MMU_PAGESIZE - offset)); 2791 pcnt++; 2792 } else { 2793 offset = (uintptr_t)vaddr & MMU_PAGEOFFSET; 2794 sglinfo->si_asp = dmar_object->dmao_obj.virt_obj.v_as; 2795 if (sglinfo->si_asp == NULL) { 2796 sglinfo->si_asp = &kas; 2797 } 2798 paddr = pfn_to_pa(hat_getpfnum(sglinfo->si_asp->a_hat, vaddr)); 2799 paddr += offset; 2800 psize = MIN(size, (MMU_PAGESIZE - offset)); 2801 vaddr += psize; 2802 } 2803 2804 raddr = ROOTNEX_PADDR_TO_RBASE(paddr); 2805 2806 if ((raddr + psize) > sglinfo->si_segmask) { 2807 upper_addr = B_TRUE; 2808 } else { 2809 lower_addr = B_TRUE; 2810 } 2811 size -= psize; 2812 2813 /* 2814 * Walk through the rest of the pages in the buffer. Track to see 2815 * if we have pages on both sides of the segment boundary. 2816 */ 2817 while (size > 0) { 2818 /* partial or full page */ 2819 psize = MIN(size, MMU_PAGESIZE); 2820 2821 if (buftype == DMA_OTYP_PAGES) { 2822 /* get the paddr from the page_t */ 2823 ASSERT(!PP_ISFREE(pp) && PAGE_LOCKED(pp)); 2824 paddr = pfn_to_pa(pp->p_pagenum); 2825 pp = pp->p_next; 2826 } else if (pplist != NULL) { 2827 /* index into the array of page_t's to get the paddr */ 2828 ASSERT(!PP_ISFREE(pplist[pcnt])); 2829 paddr = pfn_to_pa(pplist[pcnt]->p_pagenum); 2830 pcnt++; 2831 } else { 2832 /* call into the VM to get the paddr */ 2833 paddr = pfn_to_pa(hat_getpfnum(sglinfo->si_asp->a_hat, 2834 vaddr)); 2835 vaddr += psize; 2836 } 2837 2838 raddr = ROOTNEX_PADDR_TO_RBASE(paddr); 2839 2840 if ((raddr + psize) > sglinfo->si_segmask) { 2841 upper_addr = B_TRUE; 2842 } else { 2843 lower_addr = B_TRUE; 2844 } 2845 /* 2846 * if the buffer lives both above and below the segment 2847 * boundary, or the current page is the page immediately 2848 * after the segment, we will use a copy/bounce buffer for 2849 * all pages > seg. 2850 */ 2851 if ((lower_addr && upper_addr) || 2852 (raddr == (sglinfo->si_segmask + 1))) { 2853 return (B_TRUE); 2854 } 2855 2856 size -= psize; 2857 } 2858 2859 return (B_FALSE); 2860 } 2861 2862 /* 2863 * rootnex_get_sgl() 2864 * Called in bind fastpath to get the sgl. Most of this will be replaced 2865 * with a call to the vm layer when vm2.0 comes around... 2866 */ 2867 static void 2868 rootnex_get_sgl(ddi_dma_obj_t *dmar_object, ddi_dma_cookie_t *sgl, 2869 rootnex_sglinfo_t *sglinfo) 2870 { 2871 ddi_dma_atyp_t buftype; 2872 rootnex_addr_t raddr; 2873 uint64_t last_page; 2874 uint64_t offset; 2875 uint64_t addrhi; 2876 uint64_t addrlo; 2877 uint64_t maxseg; 2878 page_t **pplist; 2879 uint64_t paddr; 2880 uint32_t psize; 2881 uint32_t size; 2882 caddr_t vaddr; 2883 uint_t pcnt; 2884 page_t *pp; 2885 uint_t cnt; 2886 2887 2888 /* shortcuts */ 2889 pplist = dmar_object->dmao_obj.virt_obj.v_priv; 2890 vaddr = dmar_object->dmao_obj.virt_obj.v_addr; 2891 maxseg = sglinfo->si_max_cookie_size; 2892 buftype = dmar_object->dmao_type; 2893 addrhi = sglinfo->si_max_addr; 2894 addrlo = sglinfo->si_min_addr; 2895 size = dmar_object->dmao_size; 2896 2897 pcnt = 0; 2898 cnt = 0; 2899 2900 2901 /* 2902 * check to see if we need to use the copy buffer for pages over 2903 * the segment attr. 2904 */ 2905 sglinfo->si_bounce_on_seg = B_FALSE; 2906 if (sglinfo->si_flags & _DDI_DMA_BOUNCE_ON_SEG) { 2907 sglinfo->si_bounce_on_seg = rootnex_need_bounce_seg( 2908 dmar_object, sglinfo); 2909 } 2910 2911 /* 2912 * if we were passed down a linked list of pages, i.e. pointer to 2913 * page_t, use this to get our physical address and buf offset. 2914 */ 2915 if (buftype == DMA_OTYP_PAGES) { 2916 pp = dmar_object->dmao_obj.pp_obj.pp_pp; 2917 ASSERT(!PP_ISFREE(pp) && PAGE_LOCKED(pp)); 2918 offset = dmar_object->dmao_obj.pp_obj.pp_offset & 2919 MMU_PAGEOFFSET; 2920 paddr = pfn_to_pa(pp->p_pagenum) + offset; 2921 psize = MIN(size, (MMU_PAGESIZE - offset)); 2922 pp = pp->p_next; 2923 sglinfo->si_asp = NULL; 2924 2925 /* 2926 * We weren't passed down a linked list of pages, but if we were passed 2927 * down an array of pages, use this to get our physical address and buf 2928 * offset. 2929 */ 2930 } else if (pplist != NULL) { 2931 ASSERT((buftype == DMA_OTYP_VADDR) || 2932 (buftype == DMA_OTYP_BUFVADDR)); 2933 2934 offset = (uintptr_t)vaddr & MMU_PAGEOFFSET; 2935 sglinfo->si_asp = dmar_object->dmao_obj.virt_obj.v_as; 2936 if (sglinfo->si_asp == NULL) { 2937 sglinfo->si_asp = &kas; 2938 } 2939 2940 ASSERT(!PP_ISFREE(pplist[pcnt])); 2941 paddr = pfn_to_pa(pplist[pcnt]->p_pagenum); 2942 paddr += offset; 2943 psize = MIN(size, (MMU_PAGESIZE - offset)); 2944 pcnt++; 2945 2946 /* 2947 * All we have is a virtual address, we'll need to call into the VM 2948 * to get the physical address. 2949 */ 2950 } else { 2951 ASSERT((buftype == DMA_OTYP_VADDR) || 2952 (buftype == DMA_OTYP_BUFVADDR)); 2953 2954 offset = (uintptr_t)vaddr & MMU_PAGEOFFSET; 2955 sglinfo->si_asp = dmar_object->dmao_obj.virt_obj.v_as; 2956 if (sglinfo->si_asp == NULL) { 2957 sglinfo->si_asp = &kas; 2958 } 2959 2960 paddr = pfn_to_pa(hat_getpfnum(sglinfo->si_asp->a_hat, vaddr)); 2961 paddr += offset; 2962 psize = MIN(size, (MMU_PAGESIZE - offset)); 2963 vaddr += psize; 2964 } 2965 2966 raddr = ROOTNEX_PADDR_TO_RBASE(paddr); 2967 2968 /* 2969 * Setup the first cookie with the physical address of the page and the 2970 * size of the page (which takes into account the initial offset into 2971 * the page. 2972 */ 2973 sgl[cnt].dmac_laddress = raddr; 2974 sgl[cnt].dmac_size = psize; 2975 sgl[cnt].dmac_type = 0; 2976 2977 /* 2978 * Save away the buffer offset into the page. We'll need this later in 2979 * the copy buffer code to help figure out the page index within the 2980 * buffer and the offset into the current page. 2981 */ 2982 sglinfo->si_buf_offset = offset; 2983 2984 /* 2985 * If we are using the copy buffer for anything over the segment 2986 * boundary, and this page is over the segment boundary. 2987 * OR 2988 * if the DMA engine can't reach the physical address. 2989 */ 2990 if (((sglinfo->si_bounce_on_seg) && 2991 ((raddr + psize) > sglinfo->si_segmask)) || 2992 ((raddr < addrlo) || ((raddr + psize) > addrhi))) { 2993 /* 2994 * Increase how much copy buffer we use. We always increase by 2995 * pagesize so we don't have to worry about converting offsets. 2996 * Set a flag in the cookies dmac_type to indicate that it uses 2997 * the copy buffer. If this isn't the last cookie, go to the 2998 * next cookie (since we separate each page which uses the copy 2999 * buffer in case the copy buffer is not physically contiguous. 3000 */ 3001 sglinfo->si_copybuf_req += MMU_PAGESIZE; 3002 sgl[cnt].dmac_type = ROOTNEX_USES_COPYBUF; 3003 if ((cnt + 1) < sglinfo->si_max_pages) { 3004 cnt++; 3005 sgl[cnt].dmac_laddress = 0; 3006 sgl[cnt].dmac_size = 0; 3007 sgl[cnt].dmac_type = 0; 3008 } 3009 } 3010 3011 /* 3012 * save this page's physical address so we can figure out if the next 3013 * page is physically contiguous. Keep decrementing size until we are 3014 * done with the buffer. 3015 */ 3016 last_page = raddr & MMU_PAGEMASK; 3017 size -= psize; 3018 3019 while (size > 0) { 3020 /* Get the size for this page (i.e. partial or full page) */ 3021 psize = MIN(size, MMU_PAGESIZE); 3022 3023 if (buftype == DMA_OTYP_PAGES) { 3024 /* get the paddr from the page_t */ 3025 ASSERT(!PP_ISFREE(pp) && PAGE_LOCKED(pp)); 3026 paddr = pfn_to_pa(pp->p_pagenum); 3027 pp = pp->p_next; 3028 } else if (pplist != NULL) { 3029 /* index into the array of page_t's to get the paddr */ 3030 ASSERT(!PP_ISFREE(pplist[pcnt])); 3031 paddr = pfn_to_pa(pplist[pcnt]->p_pagenum); 3032 pcnt++; 3033 } else { 3034 /* call into the VM to get the paddr */ 3035 paddr = pfn_to_pa(hat_getpfnum(sglinfo->si_asp->a_hat, 3036 vaddr)); 3037 vaddr += psize; 3038 } 3039 3040 raddr = ROOTNEX_PADDR_TO_RBASE(paddr); 3041 3042 /* 3043 * If we are using the copy buffer for anything over the 3044 * segment boundary, and this page is over the segment 3045 * boundary. 3046 * OR 3047 * if the DMA engine can't reach the physical address. 3048 */ 3049 if (((sglinfo->si_bounce_on_seg) && 3050 ((raddr + psize) > sglinfo->si_segmask)) || 3051 ((raddr < addrlo) || ((raddr + psize) > addrhi))) { 3052 3053 sglinfo->si_copybuf_req += MMU_PAGESIZE; 3054 3055 /* 3056 * if there is something in the current cookie, go to 3057 * the next one. We only want one page in a cookie which 3058 * uses the copybuf since the copybuf doesn't have to 3059 * be physically contiguous. 3060 */ 3061 if (sgl[cnt].dmac_size != 0) { 3062 cnt++; 3063 } 3064 sgl[cnt].dmac_laddress = raddr; 3065 sgl[cnt].dmac_size = psize; 3066 #if defined(__amd64) 3067 sgl[cnt].dmac_type = ROOTNEX_USES_COPYBUF; 3068 #else 3069 /* 3070 * save the buf offset for 32-bit kernel. used in the 3071 * obsoleted interfaces. 3072 */ 3073 sgl[cnt].dmac_type = ROOTNEX_USES_COPYBUF | 3074 (dmar_object->dmao_size - size); 3075 #endif 3076 /* if this isn't the last cookie, go to the next one */ 3077 if ((cnt + 1) < sglinfo->si_max_pages) { 3078 cnt++; 3079 sgl[cnt].dmac_laddress = 0; 3080 sgl[cnt].dmac_size = 0; 3081 sgl[cnt].dmac_type = 0; 3082 } 3083 3084 /* 3085 * this page didn't need the copy buffer, if it's not physically 3086 * contiguous, or it would put us over a segment boundary, or it 3087 * puts us over the max cookie size, or the current sgl doesn't 3088 * have anything in it. 3089 */ 3090 } else if (((last_page + MMU_PAGESIZE) != raddr) || 3091 !(raddr & sglinfo->si_segmask) || 3092 ((sgl[cnt].dmac_size + psize) > maxseg) || 3093 (sgl[cnt].dmac_size == 0)) { 3094 /* 3095 * if we're not already in a new cookie, go to the next 3096 * cookie. 3097 */ 3098 if (sgl[cnt].dmac_size != 0) { 3099 cnt++; 3100 } 3101 3102 /* save the cookie information */ 3103 sgl[cnt].dmac_laddress = raddr; 3104 sgl[cnt].dmac_size = psize; 3105 #if defined(__amd64) 3106 sgl[cnt].dmac_type = 0; 3107 #else 3108 /* 3109 * save the buf offset for 32-bit kernel. used in the 3110 * obsoleted interfaces. 3111 */ 3112 sgl[cnt].dmac_type = dmar_object->dmao_size - size; 3113 #endif 3114 3115 /* 3116 * this page didn't need the copy buffer, it is physically 3117 * contiguous with the last page, and it's <= the max cookie 3118 * size. 3119 */ 3120 } else { 3121 sgl[cnt].dmac_size += psize; 3122 3123 /* 3124 * if this exactly == the maximum cookie size, and 3125 * it isn't the last cookie, go to the next cookie. 3126 */ 3127 if (((sgl[cnt].dmac_size + psize) == maxseg) && 3128 ((cnt + 1) < sglinfo->si_max_pages)) { 3129 cnt++; 3130 sgl[cnt].dmac_laddress = 0; 3131 sgl[cnt].dmac_size = 0; 3132 sgl[cnt].dmac_type = 0; 3133 } 3134 } 3135 3136 /* 3137 * save this page's physical address so we can figure out if the 3138 * next page is physically contiguous. Keep decrementing size 3139 * until we are done with the buffer. 3140 */ 3141 last_page = raddr; 3142 size -= psize; 3143 } 3144 3145 /* we're done, save away how many cookies the sgl has */ 3146 if (sgl[cnt].dmac_size == 0) { 3147 ASSERT(cnt < sglinfo->si_max_pages); 3148 sglinfo->si_sgl_size = cnt; 3149 } else { 3150 sglinfo->si_sgl_size = cnt + 1; 3151 } 3152 } 3153 3154 static void 3155 rootnex_dvma_get_sgl(ddi_dma_obj_t *dmar_object, ddi_dma_cookie_t *sgl, 3156 rootnex_sglinfo_t *sglinfo) 3157 { 3158 uint64_t offset; 3159 uint64_t maxseg; 3160 uint64_t dvaddr; 3161 struct dvmaseg *dvs; 3162 uint64_t paddr; 3163 uint32_t psize, ssize; 3164 uint32_t size; 3165 uint_t cnt; 3166 int physcontig; 3167 3168 ASSERT(dmar_object->dmao_type == DMA_OTYP_DVADDR); 3169 3170 /* shortcuts */ 3171 maxseg = sglinfo->si_max_cookie_size; 3172 size = dmar_object->dmao_size; 3173 3174 cnt = 0; 3175 sglinfo->si_bounce_on_seg = B_FALSE; 3176 3177 dvs = dmar_object->dmao_obj.dvma_obj.dv_seg; 3178 offset = dmar_object->dmao_obj.dvma_obj.dv_off; 3179 ssize = dvs->dvs_len; 3180 paddr = dvs->dvs_start; 3181 paddr += offset; 3182 psize = MIN(ssize, (maxseg - offset)); 3183 dvaddr = paddr + psize; 3184 ssize -= psize; 3185 3186 sgl[cnt].dmac_laddress = paddr; 3187 sgl[cnt].dmac_size = psize; 3188 sgl[cnt].dmac_type = 0; 3189 3190 size -= psize; 3191 while (size > 0) { 3192 if (ssize == 0) { 3193 dvs++; 3194 ssize = dvs->dvs_len; 3195 dvaddr = dvs->dvs_start; 3196 physcontig = 0; 3197 } else 3198 physcontig = 1; 3199 3200 paddr = dvaddr; 3201 psize = MIN(ssize, maxseg); 3202 dvaddr += psize; 3203 ssize -= psize; 3204 3205 if (!physcontig || !(paddr & sglinfo->si_segmask) || 3206 ((sgl[cnt].dmac_size + psize) > maxseg) || 3207 (sgl[cnt].dmac_size == 0)) { 3208 /* 3209 * if we're not already in a new cookie, go to the next 3210 * cookie. 3211 */ 3212 if (sgl[cnt].dmac_size != 0) { 3213 cnt++; 3214 } 3215 3216 /* save the cookie information */ 3217 sgl[cnt].dmac_laddress = paddr; 3218 sgl[cnt].dmac_size = psize; 3219 sgl[cnt].dmac_type = 0; 3220 } else { 3221 sgl[cnt].dmac_size += psize; 3222 3223 /* 3224 * if this exactly == the maximum cookie size, and 3225 * it isn't the last cookie, go to the next cookie. 3226 */ 3227 if (((sgl[cnt].dmac_size + psize) == maxseg) && 3228 ((cnt + 1) < sglinfo->si_max_pages)) { 3229 cnt++; 3230 sgl[cnt].dmac_laddress = 0; 3231 sgl[cnt].dmac_size = 0; 3232 sgl[cnt].dmac_type = 0; 3233 } 3234 } 3235 size -= psize; 3236 } 3237 3238 /* we're done, save away how many cookies the sgl has */ 3239 if (sgl[cnt].dmac_size == 0) { 3240 sglinfo->si_sgl_size = cnt; 3241 } else { 3242 sglinfo->si_sgl_size = cnt + 1; 3243 } 3244 } 3245 3246 /* 3247 * rootnex_bind_slowpath() 3248 * Call in the bind path if the calling driver can't use the sgl without 3249 * modifying it. We either need to use the copy buffer and/or we will end up 3250 * with a partial bind. 3251 */ 3252 static int 3253 rootnex_bind_slowpath(ddi_dma_impl_t *hp, struct ddi_dma_req *dmareq, 3254 rootnex_dma_t *dma, ddi_dma_attr_t *attr, ddi_dma_obj_t *dmao, int kmflag) 3255 { 3256 rootnex_sglinfo_t *sinfo; 3257 rootnex_window_t *window; 3258 ddi_dma_cookie_t *cookie; 3259 size_t copybuf_used; 3260 size_t dmac_size; 3261 boolean_t partial; 3262 off_t cur_offset; 3263 page_t *cur_pp; 3264 major_t mnum; 3265 int e; 3266 int i; 3267 3268 3269 sinfo = &dma->dp_sglinfo; 3270 copybuf_used = 0; 3271 partial = B_FALSE; 3272 3273 /* 3274 * If we're using the copybuf, set the copybuf state in dma struct. 3275 * Needs to be first since it sets the copy buffer size. 3276 */ 3277 if (sinfo->si_copybuf_req != 0) { 3278 e = rootnex_setup_copybuf(hp, dmareq, dma, attr); 3279 if (e != DDI_SUCCESS) { 3280 return (e); 3281 } 3282 } else { 3283 dma->dp_copybuf_size = 0; 3284 } 3285 3286 /* 3287 * Figure out if we need to do a partial mapping. If so, figure out 3288 * if we need to trim the buffers when we munge the sgl. 3289 */ 3290 if ((dma->dp_copybuf_size < sinfo->si_copybuf_req) || 3291 (dmao->dmao_size > dma->dp_maxxfer) || 3292 (attr->dma_attr_sgllen < sinfo->si_sgl_size)) { 3293 dma->dp_partial_required = B_TRUE; 3294 if (attr->dma_attr_granular != 1) { 3295 dma->dp_trim_required = B_TRUE; 3296 } 3297 } else { 3298 dma->dp_partial_required = B_FALSE; 3299 dma->dp_trim_required = B_FALSE; 3300 } 3301 3302 /* If we need to do a partial bind, make sure the driver supports it */ 3303 if (dma->dp_partial_required && 3304 !(dmareq->dmar_flags & DDI_DMA_PARTIAL)) { 3305 3306 mnum = ddi_driver_major(dma->dp_dip); 3307 /* 3308 * patchable which allows us to print one warning per major 3309 * number. 3310 */ 3311 if ((rootnex_bind_warn) && 3312 ((rootnex_warn_list[mnum] & ROOTNEX_BIND_WARNING) == 0)) { 3313 rootnex_warn_list[mnum] |= ROOTNEX_BIND_WARNING; 3314 cmn_err(CE_WARN, "!%s: coding error detected, the " 3315 "driver is using ddi_dma_attr(9S) incorrectly. " 3316 "There is a small risk of data corruption in " 3317 "particular with large I/Os. The driver should be " 3318 "replaced with a corrected version for proper " 3319 "system operation. To disable this warning, add " 3320 "'set rootnex:rootnex_bind_warn=0' to " 3321 "/etc/system(4).", ddi_driver_name(dma->dp_dip)); 3322 } 3323 return (DDI_DMA_TOOBIG); 3324 } 3325 3326 /* 3327 * we might need multiple windows, setup state to handle them. In this 3328 * code path, we will have at least one window. 3329 */ 3330 e = rootnex_setup_windows(hp, dma, attr, dmao, kmflag); 3331 if (e != DDI_SUCCESS) { 3332 rootnex_teardown_copybuf(dma); 3333 return (e); 3334 } 3335 3336 window = &dma->dp_window[0]; 3337 cookie = &dma->dp_cookies[0]; 3338 cur_offset = 0; 3339 rootnex_init_win(hp, dma, window, cookie, cur_offset); 3340 if (dmao->dmao_type == DMA_OTYP_PAGES) { 3341 cur_pp = dmareq->dmar_object.dmao_obj.pp_obj.pp_pp; 3342 } 3343 3344 /* loop though all the cookies we got back from get_sgl() */ 3345 for (i = 0; i < sinfo->si_sgl_size; i++) { 3346 /* 3347 * If we're using the copy buffer, check this cookie and setup 3348 * its associated copy buffer state. If this cookie uses the 3349 * copy buffer, make sure we sync this window during dma_sync. 3350 */ 3351 if (dma->dp_copybuf_size > 0) { 3352 rootnex_setup_cookie(dmao, dma, cookie, 3353 cur_offset, ©buf_used, &cur_pp); 3354 if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { 3355 window->wd_dosync = B_TRUE; 3356 } 3357 } 3358 3359 /* 3360 * save away the cookie size, since it could be modified in 3361 * the windowing code. 3362 */ 3363 dmac_size = cookie->dmac_size; 3364 3365 /* if we went over max copybuf size */ 3366 if (dma->dp_copybuf_size && 3367 (copybuf_used > dma->dp_copybuf_size)) { 3368 partial = B_TRUE; 3369 e = rootnex_copybuf_window_boundary(hp, dma, &window, 3370 cookie, cur_offset, ©buf_used); 3371 if (e != DDI_SUCCESS) { 3372 rootnex_teardown_copybuf(dma); 3373 rootnex_teardown_windows(dma); 3374 return (e); 3375 } 3376 3377 /* 3378 * if the coookie uses the copy buffer, make sure the 3379 * new window we just moved to is set to sync. 3380 */ 3381 if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { 3382 window->wd_dosync = B_TRUE; 3383 } 3384 ROOTNEX_DPROBE1(rootnex__copybuf__window, dev_info_t *, 3385 dma->dp_dip); 3386 3387 /* if the cookie cnt == max sgllen, move to the next window */ 3388 } else if (window->wd_cookie_cnt >= attr->dma_attr_sgllen) { 3389 partial = B_TRUE; 3390 ASSERT(window->wd_cookie_cnt == attr->dma_attr_sgllen); 3391 e = rootnex_sgllen_window_boundary(hp, dma, &window, 3392 cookie, attr, cur_offset); 3393 if (e != DDI_SUCCESS) { 3394 rootnex_teardown_copybuf(dma); 3395 rootnex_teardown_windows(dma); 3396 return (e); 3397 } 3398 3399 /* 3400 * if the coookie uses the copy buffer, make sure the 3401 * new window we just moved to is set to sync. 3402 */ 3403 if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { 3404 window->wd_dosync = B_TRUE; 3405 } 3406 ROOTNEX_DPROBE1(rootnex__sgllen__window, dev_info_t *, 3407 dma->dp_dip); 3408 3409 /* else if we will be over maxxfer */ 3410 } else if ((window->wd_size + dmac_size) > 3411 dma->dp_maxxfer) { 3412 partial = B_TRUE; 3413 e = rootnex_maxxfer_window_boundary(hp, dma, &window, 3414 cookie); 3415 if (e != DDI_SUCCESS) { 3416 rootnex_teardown_copybuf(dma); 3417 rootnex_teardown_windows(dma); 3418 return (e); 3419 } 3420 3421 /* 3422 * if the coookie uses the copy buffer, make sure the 3423 * new window we just moved to is set to sync. 3424 */ 3425 if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { 3426 window->wd_dosync = B_TRUE; 3427 } 3428 ROOTNEX_DPROBE1(rootnex__maxxfer__window, dev_info_t *, 3429 dma->dp_dip); 3430 3431 /* else this cookie fits in the current window */ 3432 } else { 3433 window->wd_cookie_cnt++; 3434 window->wd_size += dmac_size; 3435 } 3436 3437 /* track our offset into the buffer, go to the next cookie */ 3438 ASSERT(dmac_size <= dmao->dmao_size); 3439 ASSERT(cookie->dmac_size <= dmac_size); 3440 cur_offset += dmac_size; 3441 cookie++; 3442 } 3443 3444 /* if we ended up with a zero sized window in the end, clean it up */ 3445 if (window->wd_size == 0) { 3446 hp->dmai_nwin--; 3447 window--; 3448 } 3449 3450 ASSERT(window->wd_trim.tr_trim_last == B_FALSE); 3451 3452 if (!partial) { 3453 return (DDI_DMA_MAPPED); 3454 } 3455 3456 ASSERT(dma->dp_partial_required); 3457 return (DDI_DMA_PARTIAL_MAP); 3458 } 3459 3460 /* 3461 * rootnex_setup_copybuf() 3462 * Called in bind slowpath. Figures out if we're going to use the copy 3463 * buffer, and if we do, sets up the basic state to handle it. 3464 */ 3465 static int 3466 rootnex_setup_copybuf(ddi_dma_impl_t *hp, struct ddi_dma_req *dmareq, 3467 rootnex_dma_t *dma, ddi_dma_attr_t *attr) 3468 { 3469 rootnex_sglinfo_t *sinfo; 3470 ddi_dma_attr_t lattr; 3471 size_t max_copybuf; 3472 int cansleep; 3473 int e; 3474 #if !defined(__amd64) 3475 int vmflag; 3476 #endif 3477 3478 ASSERT(!dma->dp_dvma_used); 3479 3480 sinfo = &dma->dp_sglinfo; 3481 3482 /* read this first so it's consistent through the routine */ 3483 max_copybuf = i_ddi_copybuf_size() & MMU_PAGEMASK; 3484 3485 /* We need to call into the rootnex on ddi_dma_sync() */ 3486 hp->dmai_rflags &= ~DMP_NOSYNC; 3487 3488 /* make sure the copybuf size <= the max size */ 3489 dma->dp_copybuf_size = MIN(sinfo->si_copybuf_req, max_copybuf); 3490 ASSERT((dma->dp_copybuf_size & MMU_PAGEOFFSET) == 0); 3491 3492 #if !defined(__amd64) 3493 /* 3494 * if we don't have kva space to copy to/from, allocate the KVA space 3495 * now. We only do this for the 32-bit kernel. We use seg kpm space for 3496 * the 64-bit kernel. 3497 */ 3498 if ((dmareq->dmar_object.dmao_type == DMA_OTYP_PAGES) || 3499 (dmareq->dmar_object.dmao_obj.virt_obj.v_as != NULL)) { 3500 3501 /* convert the sleep flags */ 3502 if (dmareq->dmar_fp == DDI_DMA_SLEEP) { 3503 vmflag = VM_SLEEP; 3504 } else { 3505 vmflag = VM_NOSLEEP; 3506 } 3507 3508 /* allocate Kernel VA space that we can bcopy to/from */ 3509 dma->dp_kva = vmem_alloc(heap_arena, dma->dp_copybuf_size, 3510 vmflag); 3511 if (dma->dp_kva == NULL) { 3512 return (DDI_DMA_NORESOURCES); 3513 } 3514 } 3515 #endif 3516 3517 /* convert the sleep flags */ 3518 if (dmareq->dmar_fp == DDI_DMA_SLEEP) { 3519 cansleep = 1; 3520 } else { 3521 cansleep = 0; 3522 } 3523 3524 /* 3525 * Allocate the actual copy buffer. This needs to fit within the DMA 3526 * engine limits, so we can't use kmem_alloc... We don't need 3527 * contiguous memory (sgllen) since we will be forcing windows on 3528 * sgllen anyway. 3529 */ 3530 lattr = *attr; 3531 lattr.dma_attr_align = MMU_PAGESIZE; 3532 /* 3533 * this should be < 0 to indicate no limit, but due to a bug in 3534 * the rootnex, we'll set it to the maximum positive int. 3535 */ 3536 lattr.dma_attr_sgllen = 0x7fffffff; 3537 /* 3538 * if we're using the copy buffer because of seg, use that for our 3539 * upper address limit. 3540 */ 3541 if (sinfo->si_bounce_on_seg) { 3542 lattr.dma_attr_addr_hi = lattr.dma_attr_seg; 3543 } 3544 e = i_ddi_mem_alloc(dma->dp_dip, &lattr, dma->dp_copybuf_size, cansleep, 3545 0, NULL, &dma->dp_cbaddr, &dma->dp_cbsize, NULL); 3546 if (e != DDI_SUCCESS) { 3547 #if !defined(__amd64) 3548 if (dma->dp_kva != NULL) { 3549 vmem_free(heap_arena, dma->dp_kva, 3550 dma->dp_copybuf_size); 3551 } 3552 #endif 3553 return (DDI_DMA_NORESOURCES); 3554 } 3555 3556 ROOTNEX_DPROBE2(rootnex__alloc__copybuf, dev_info_t *, dma->dp_dip, 3557 size_t, dma->dp_copybuf_size); 3558 3559 return (DDI_SUCCESS); 3560 } 3561 3562 3563 /* 3564 * rootnex_setup_windows() 3565 * Called in bind slowpath to setup the window state. We always have windows 3566 * in the slowpath. Even if the window count = 1. 3567 */ 3568 static int 3569 rootnex_setup_windows(ddi_dma_impl_t *hp, rootnex_dma_t *dma, 3570 ddi_dma_attr_t *attr, ddi_dma_obj_t *dmao, int kmflag) 3571 { 3572 rootnex_window_t *windowp; 3573 rootnex_sglinfo_t *sinfo; 3574 size_t copy_state_size; 3575 size_t win_state_size; 3576 size_t state_available; 3577 size_t space_needed; 3578 uint_t copybuf_win; 3579 uint_t maxxfer_win; 3580 size_t space_used; 3581 uint_t sglwin; 3582 3583 3584 sinfo = &dma->dp_sglinfo; 3585 3586 dma->dp_current_win = 0; 3587 hp->dmai_nwin = 0; 3588 3589 /* If we don't need to do a partial, we only have one window */ 3590 if (!dma->dp_partial_required) { 3591 dma->dp_max_win = 1; 3592 3593 /* 3594 * we need multiple windows, need to figure out the worse case number 3595 * of windows. 3596 */ 3597 } else { 3598 /* 3599 * if we need windows because we need more copy buffer that 3600 * we allow, the worse case number of windows we could need 3601 * here would be (copybuf space required / copybuf space that 3602 * we have) plus one for remainder, and plus 2 to handle the 3603 * extra pages on the trim for the first and last pages of the 3604 * buffer (a page is the minimum window size so under the right 3605 * attr settings, you could have a window for each page). 3606 * The last page will only be hit here if the size is not a 3607 * multiple of the granularity (which theoretically shouldn't 3608 * be the case but never has been enforced, so we could have 3609 * broken things without it). 3610 */ 3611 if (sinfo->si_copybuf_req > dma->dp_copybuf_size) { 3612 ASSERT(dma->dp_copybuf_size > 0); 3613 copybuf_win = (sinfo->si_copybuf_req / 3614 dma->dp_copybuf_size) + 1 + 2; 3615 } else { 3616 copybuf_win = 0; 3617 } 3618 3619 /* 3620 * if we need windows because we have more cookies than the H/W 3621 * can handle, the number of windows we would need here would 3622 * be (cookie count / cookies count H/W supports minus 1[for 3623 * trim]) plus one for remainder. 3624 */ 3625 if (attr->dma_attr_sgllen < sinfo->si_sgl_size) { 3626 sglwin = (sinfo->si_sgl_size / 3627 (attr->dma_attr_sgllen - 1)) + 1; 3628 } else { 3629 sglwin = 0; 3630 } 3631 3632 /* 3633 * if we need windows because we're binding more memory than the 3634 * H/W can transfer at once, the number of windows we would need 3635 * here would be (xfer count / max xfer H/W supports) plus one 3636 * for remainder, and plus 2 to handle the extra pages on the 3637 * trim (see above comment about trim) 3638 */ 3639 if (dmao->dmao_size > dma->dp_maxxfer) { 3640 maxxfer_win = (dmao->dmao_size / 3641 dma->dp_maxxfer) + 1 + 2; 3642 } else { 3643 maxxfer_win = 0; 3644 } 3645 dma->dp_max_win = copybuf_win + sglwin + maxxfer_win; 3646 ASSERT(dma->dp_max_win > 0); 3647 } 3648 win_state_size = dma->dp_max_win * sizeof (rootnex_window_t); 3649 3650 /* 3651 * Get space for window and potential copy buffer state. Before we 3652 * go and allocate memory, see if we can get away with using what's 3653 * left in the pre-allocted state or the dynamically allocated sgl. 3654 */ 3655 space_used = (uintptr_t)(sinfo->si_sgl_size * 3656 sizeof (ddi_dma_cookie_t)); 3657 3658 /* if we dynamically allocated space for the cookies */ 3659 if (dma->dp_need_to_free_cookie) { 3660 /* if we have more space in the pre-allocted buffer, use it */ 3661 ASSERT(space_used <= dma->dp_cookie_size); 3662 if ((dma->dp_cookie_size - space_used) <= 3663 rootnex_state->r_prealloc_size) { 3664 state_available = rootnex_state->r_prealloc_size; 3665 windowp = (rootnex_window_t *)dma->dp_prealloc_buffer; 3666 3667 /* 3668 * else, we have more free space in the dynamically allocated 3669 * buffer, i.e. the buffer wasn't worse case fragmented so we 3670 * didn't need a lot of cookies. 3671 */ 3672 } else { 3673 state_available = dma->dp_cookie_size - space_used; 3674 windowp = (rootnex_window_t *) 3675 &dma->dp_cookies[sinfo->si_sgl_size]; 3676 } 3677 3678 /* we used the pre-alloced buffer */ 3679 } else { 3680 ASSERT(space_used <= rootnex_state->r_prealloc_size); 3681 state_available = rootnex_state->r_prealloc_size - space_used; 3682 windowp = (rootnex_window_t *) 3683 &dma->dp_cookies[sinfo->si_sgl_size]; 3684 } 3685 3686 /* 3687 * figure out how much state we need to track the copy buffer. Add an 3688 * addition 8 bytes for pointer alignemnt later. 3689 */ 3690 if (dma->dp_copybuf_size > 0) { 3691 copy_state_size = sinfo->si_max_pages * 3692 sizeof (rootnex_pgmap_t); 3693 } else { 3694 copy_state_size = 0; 3695 } 3696 /* add an additional 8 bytes for pointer alignment */ 3697 space_needed = win_state_size + copy_state_size + 0x8; 3698 3699 /* if we have enough space already, use it */ 3700 if (state_available >= space_needed) { 3701 dma->dp_window = windowp; 3702 dma->dp_need_to_free_window = B_FALSE; 3703 3704 /* not enough space, need to allocate more. */ 3705 } else { 3706 dma->dp_window = kmem_alloc(space_needed, kmflag); 3707 if (dma->dp_window == NULL) { 3708 return (DDI_DMA_NORESOURCES); 3709 } 3710 dma->dp_need_to_free_window = B_TRUE; 3711 dma->dp_window_size = space_needed; 3712 ROOTNEX_DPROBE2(rootnex__bind__sp__alloc, dev_info_t *, 3713 dma->dp_dip, size_t, space_needed); 3714 } 3715 3716 /* 3717 * we allocate copy buffer state and window state at the same time. 3718 * setup our copy buffer state pointers. Make sure it's aligned. 3719 */ 3720 if (dma->dp_copybuf_size > 0) { 3721 dma->dp_pgmap = (rootnex_pgmap_t *)(((uintptr_t) 3722 &dma->dp_window[dma->dp_max_win] + 0x7) & ~0x7); 3723 3724 #if !defined(__amd64) 3725 /* 3726 * make sure all pm_mapped, pm_vaddr, and pm_pp are set to 3727 * false/NULL. Should be quicker to bzero vs loop and set. 3728 */ 3729 bzero(dma->dp_pgmap, copy_state_size); 3730 #endif 3731 } else { 3732 dma->dp_pgmap = NULL; 3733 } 3734 3735 return (DDI_SUCCESS); 3736 } 3737 3738 3739 /* 3740 * rootnex_teardown_copybuf() 3741 * cleans up after rootnex_setup_copybuf() 3742 */ 3743 static void 3744 rootnex_teardown_copybuf(rootnex_dma_t *dma) 3745 { 3746 #if !defined(__amd64) 3747 int i; 3748 3749 /* 3750 * if we allocated kernel heap VMEM space, go through all the pages and 3751 * map out any of the ones that we're mapped into the kernel heap VMEM 3752 * arena. Then free the VMEM space. 3753 */ 3754 if (dma->dp_kva != NULL) { 3755 for (i = 0; i < dma->dp_sglinfo.si_max_pages; i++) { 3756 if (dma->dp_pgmap[i].pm_mapped) { 3757 hat_unload(kas.a_hat, dma->dp_pgmap[i].pm_kaddr, 3758 MMU_PAGESIZE, HAT_UNLOAD); 3759 dma->dp_pgmap[i].pm_mapped = B_FALSE; 3760 } 3761 } 3762 3763 vmem_free(heap_arena, dma->dp_kva, dma->dp_copybuf_size); 3764 } 3765 3766 #endif 3767 3768 /* if we allocated a copy buffer, free it */ 3769 if (dma->dp_cbaddr != NULL) { 3770 i_ddi_mem_free(dma->dp_cbaddr, NULL); 3771 } 3772 } 3773 3774 3775 /* 3776 * rootnex_teardown_windows() 3777 * cleans up after rootnex_setup_windows() 3778 */ 3779 static void 3780 rootnex_teardown_windows(rootnex_dma_t *dma) 3781 { 3782 /* 3783 * if we had to allocate window state on the last bind (because we 3784 * didn't have enough pre-allocated space in the handle), free it. 3785 */ 3786 if (dma->dp_need_to_free_window) { 3787 kmem_free(dma->dp_window, dma->dp_window_size); 3788 } 3789 } 3790 3791 3792 /* 3793 * rootnex_init_win() 3794 * Called in bind slow path during creation of a new window. Initializes 3795 * window state to default values. 3796 */ 3797 /*ARGSUSED*/ 3798 static void 3799 rootnex_init_win(ddi_dma_impl_t *hp, rootnex_dma_t *dma, 3800 rootnex_window_t *window, ddi_dma_cookie_t *cookie, off_t cur_offset) 3801 { 3802 hp->dmai_nwin++; 3803 window->wd_dosync = B_FALSE; 3804 window->wd_offset = cur_offset; 3805 window->wd_size = 0; 3806 window->wd_first_cookie = cookie; 3807 window->wd_cookie_cnt = 0; 3808 window->wd_trim.tr_trim_first = B_FALSE; 3809 window->wd_trim.tr_trim_last = B_FALSE; 3810 window->wd_trim.tr_first_copybuf_win = B_FALSE; 3811 window->wd_trim.tr_last_copybuf_win = B_FALSE; 3812 #if !defined(__amd64) 3813 window->wd_remap_copybuf = dma->dp_cb_remaping; 3814 #endif 3815 } 3816 3817 3818 /* 3819 * rootnex_setup_cookie() 3820 * Called in the bind slow path when the sgl uses the copy buffer. If any of 3821 * the sgl uses the copy buffer, we need to go through each cookie, figure 3822 * out if it uses the copy buffer, and if it does, save away everything we'll 3823 * need during sync. 3824 */ 3825 static void 3826 rootnex_setup_cookie(ddi_dma_obj_t *dmar_object, rootnex_dma_t *dma, 3827 ddi_dma_cookie_t *cookie, off_t cur_offset, size_t *copybuf_used, 3828 page_t **cur_pp) 3829 { 3830 boolean_t copybuf_sz_power_2; 3831 rootnex_sglinfo_t *sinfo; 3832 paddr_t paddr; 3833 uint_t pidx; 3834 uint_t pcnt; 3835 off_t poff; 3836 #if defined(__amd64) 3837 pfn_t pfn; 3838 #else 3839 page_t **pplist; 3840 #endif 3841 3842 ASSERT(dmar_object->dmao_type != DMA_OTYP_DVADDR); 3843 3844 sinfo = &dma->dp_sglinfo; 3845 3846 /* 3847 * Calculate the page index relative to the start of the buffer. The 3848 * index to the current page for our buffer is the offset into the 3849 * first page of the buffer plus our current offset into the buffer 3850 * itself, shifted of course... 3851 */ 3852 pidx = (sinfo->si_buf_offset + cur_offset) >> MMU_PAGESHIFT; 3853 ASSERT(pidx < sinfo->si_max_pages); 3854 3855 /* if this cookie uses the copy buffer */ 3856 if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { 3857 /* 3858 * NOTE: we know that since this cookie uses the copy buffer, it 3859 * is <= MMU_PAGESIZE. 3860 */ 3861 3862 /* 3863 * get the offset into the page. For the 64-bit kernel, get the 3864 * pfn which we'll use with seg kpm. 3865 */ 3866 poff = cookie->dmac_laddress & MMU_PAGEOFFSET; 3867 #if defined(__amd64) 3868 /* mfn_to_pfn() is a NOP on i86pc */ 3869 pfn = mfn_to_pfn(cookie->dmac_laddress >> MMU_PAGESHIFT); 3870 #endif /* __amd64 */ 3871 3872 /* figure out if the copybuf size is a power of 2 */ 3873 if (dma->dp_copybuf_size & (dma->dp_copybuf_size - 1)) { 3874 copybuf_sz_power_2 = B_FALSE; 3875 } else { 3876 copybuf_sz_power_2 = B_TRUE; 3877 } 3878 3879 /* This page uses the copy buffer */ 3880 dma->dp_pgmap[pidx].pm_uses_copybuf = B_TRUE; 3881 3882 /* 3883 * save the copy buffer KVA that we'll use with this page. 3884 * if we still fit within the copybuf, it's a simple add. 3885 * otherwise, we need to wrap over using & or % accordingly. 3886 */ 3887 if ((*copybuf_used + MMU_PAGESIZE) <= dma->dp_copybuf_size) { 3888 dma->dp_pgmap[pidx].pm_cbaddr = dma->dp_cbaddr + 3889 *copybuf_used; 3890 } else { 3891 if (copybuf_sz_power_2) { 3892 dma->dp_pgmap[pidx].pm_cbaddr = (caddr_t)( 3893 (uintptr_t)dma->dp_cbaddr + 3894 (*copybuf_used & 3895 (dma->dp_copybuf_size - 1))); 3896 } else { 3897 dma->dp_pgmap[pidx].pm_cbaddr = (caddr_t)( 3898 (uintptr_t)dma->dp_cbaddr + 3899 (*copybuf_used % dma->dp_copybuf_size)); 3900 } 3901 } 3902 3903 /* 3904 * over write the cookie physical address with the address of 3905 * the physical address of the copy buffer page that we will 3906 * use. 3907 */ 3908 paddr = pfn_to_pa(hat_getpfnum(kas.a_hat, 3909 dma->dp_pgmap[pidx].pm_cbaddr)) + poff; 3910 3911 cookie->dmac_laddress = ROOTNEX_PADDR_TO_RBASE(paddr); 3912 3913 /* if we have a kernel VA, it's easy, just save that address */ 3914 if ((dmar_object->dmao_type != DMA_OTYP_PAGES) && 3915 (sinfo->si_asp == &kas)) { 3916 /* 3917 * save away the page aligned virtual address of the 3918 * driver buffer. Offsets are handled in the sync code. 3919 */ 3920 dma->dp_pgmap[pidx].pm_kaddr = (caddr_t)(((uintptr_t) 3921 dmar_object->dmao_obj.virt_obj.v_addr + cur_offset) 3922 & MMU_PAGEMASK); 3923 #if !defined(__amd64) 3924 /* 3925 * we didn't need to, and will never need to map this 3926 * page. 3927 */ 3928 dma->dp_pgmap[pidx].pm_mapped = B_FALSE; 3929 #endif 3930 3931 /* we don't have a kernel VA. We need one for the bcopy. */ 3932 } else { 3933 #if defined(__amd64) 3934 /* 3935 * for the 64-bit kernel, it's easy. We use seg kpm to 3936 * get a Kernel VA for the corresponding pfn. 3937 */ 3938 dma->dp_pgmap[pidx].pm_kaddr = hat_kpm_pfn2va(pfn); 3939 #else 3940 /* 3941 * for the 32-bit kernel, this is a pain. First we'll 3942 * save away the page_t or user VA for this page. This 3943 * is needed in rootnex_dma_win() when we switch to a 3944 * new window which requires us to re-map the copy 3945 * buffer. 3946 */ 3947 pplist = dmar_object->dmao_obj.virt_obj.v_priv; 3948 if (dmar_object->dmao_type == DMA_OTYP_PAGES) { 3949 dma->dp_pgmap[pidx].pm_pp = *cur_pp; 3950 dma->dp_pgmap[pidx].pm_vaddr = NULL; 3951 } else if (pplist != NULL) { 3952 dma->dp_pgmap[pidx].pm_pp = pplist[pidx]; 3953 dma->dp_pgmap[pidx].pm_vaddr = NULL; 3954 } else { 3955 dma->dp_pgmap[pidx].pm_pp = NULL; 3956 dma->dp_pgmap[pidx].pm_vaddr = (caddr_t) 3957 (((uintptr_t) 3958 dmar_object->dmao_obj.virt_obj.v_addr + 3959 cur_offset) & MMU_PAGEMASK); 3960 } 3961 3962 /* 3963 * save away the page aligned virtual address which was 3964 * allocated from the kernel heap arena (taking into 3965 * account if we need more copy buffer than we alloced 3966 * and use multiple windows to handle this, i.e. &,%). 3967 * NOTE: there isn't and physical memory backing up this 3968 * virtual address space currently. 3969 */ 3970 if ((*copybuf_used + MMU_PAGESIZE) <= 3971 dma->dp_copybuf_size) { 3972 dma->dp_pgmap[pidx].pm_kaddr = (caddr_t) 3973 (((uintptr_t)dma->dp_kva + *copybuf_used) & 3974 MMU_PAGEMASK); 3975 } else { 3976 if (copybuf_sz_power_2) { 3977 dma->dp_pgmap[pidx].pm_kaddr = (caddr_t) 3978 (((uintptr_t)dma->dp_kva + 3979 (*copybuf_used & 3980 (dma->dp_copybuf_size - 1))) & 3981 MMU_PAGEMASK); 3982 } else { 3983 dma->dp_pgmap[pidx].pm_kaddr = (caddr_t) 3984 (((uintptr_t)dma->dp_kva + 3985 (*copybuf_used % 3986 dma->dp_copybuf_size)) & 3987 MMU_PAGEMASK); 3988 } 3989 } 3990 3991 /* 3992 * if we haven't used up the available copy buffer yet, 3993 * map the kva to the physical page. 3994 */ 3995 if (!dma->dp_cb_remaping && ((*copybuf_used + 3996 MMU_PAGESIZE) <= dma->dp_copybuf_size)) { 3997 dma->dp_pgmap[pidx].pm_mapped = B_TRUE; 3998 if (dma->dp_pgmap[pidx].pm_pp != NULL) { 3999 i86_pp_map(dma->dp_pgmap[pidx].pm_pp, 4000 dma->dp_pgmap[pidx].pm_kaddr); 4001 } else { 4002 i86_va_map(dma->dp_pgmap[pidx].pm_vaddr, 4003 sinfo->si_asp, 4004 dma->dp_pgmap[pidx].pm_kaddr); 4005 } 4006 4007 /* 4008 * we've used up the available copy buffer, this page 4009 * will have to be mapped during rootnex_dma_win() when 4010 * we switch to a new window which requires a re-map 4011 * the copy buffer. (32-bit kernel only) 4012 */ 4013 } else { 4014 dma->dp_pgmap[pidx].pm_mapped = B_FALSE; 4015 } 4016 #endif 4017 /* go to the next page_t */ 4018 if (dmar_object->dmao_type == DMA_OTYP_PAGES) { 4019 *cur_pp = (*cur_pp)->p_next; 4020 } 4021 } 4022 4023 /* add to the copy buffer count */ 4024 *copybuf_used += MMU_PAGESIZE; 4025 4026 /* 4027 * This cookie doesn't use the copy buffer. Walk through the pages this 4028 * cookie occupies to reflect this. 4029 */ 4030 } else { 4031 /* 4032 * figure out how many pages the cookie occupies. We need to 4033 * use the original page offset of the buffer and the cookies 4034 * offset in the buffer to do this. 4035 */ 4036 poff = (sinfo->si_buf_offset + cur_offset) & MMU_PAGEOFFSET; 4037 pcnt = mmu_btopr(cookie->dmac_size + poff); 4038 4039 while (pcnt > 0) { 4040 #if !defined(__amd64) 4041 /* 4042 * the 32-bit kernel doesn't have seg kpm, so we need 4043 * to map in the driver buffer (if it didn't come down 4044 * with a kernel VA) on the fly. Since this page doesn't 4045 * use the copy buffer, it's not, or will it ever, have 4046 * to be mapped in. 4047 */ 4048 dma->dp_pgmap[pidx].pm_mapped = B_FALSE; 4049 #endif 4050 dma->dp_pgmap[pidx].pm_uses_copybuf = B_FALSE; 4051 4052 /* 4053 * we need to update pidx and cur_pp or we'll loose 4054 * track of where we are. 4055 */ 4056 if (dmar_object->dmao_type == DMA_OTYP_PAGES) { 4057 *cur_pp = (*cur_pp)->p_next; 4058 } 4059 pidx++; 4060 pcnt--; 4061 } 4062 } 4063 } 4064 4065 4066 /* 4067 * rootnex_sgllen_window_boundary() 4068 * Called in the bind slow path when the next cookie causes us to exceed (in 4069 * this case == since we start at 0 and sgllen starts at 1) the maximum sgl 4070 * length supported by the DMA H/W. 4071 */ 4072 static int 4073 rootnex_sgllen_window_boundary(ddi_dma_impl_t *hp, rootnex_dma_t *dma, 4074 rootnex_window_t **windowp, ddi_dma_cookie_t *cookie, ddi_dma_attr_t *attr, 4075 off_t cur_offset) 4076 { 4077 off_t new_offset; 4078 size_t trim_sz; 4079 off_t coffset; 4080 4081 4082 /* 4083 * if we know we'll never have to trim, it's pretty easy. Just move to 4084 * the next window and init it. We're done. 4085 */ 4086 if (!dma->dp_trim_required) { 4087 (*windowp)++; 4088 rootnex_init_win(hp, dma, *windowp, cookie, cur_offset); 4089 (*windowp)->wd_cookie_cnt++; 4090 (*windowp)->wd_size = cookie->dmac_size; 4091 return (DDI_SUCCESS); 4092 } 4093 4094 /* figure out how much we need to trim from the window */ 4095 ASSERT(attr->dma_attr_granular != 0); 4096 if (dma->dp_granularity_power_2) { 4097 trim_sz = (*windowp)->wd_size & (attr->dma_attr_granular - 1); 4098 } else { 4099 trim_sz = (*windowp)->wd_size % attr->dma_attr_granular; 4100 } 4101 4102 /* The window's a whole multiple of granularity. We're done */ 4103 if (trim_sz == 0) { 4104 (*windowp)++; 4105 rootnex_init_win(hp, dma, *windowp, cookie, cur_offset); 4106 (*windowp)->wd_cookie_cnt++; 4107 (*windowp)->wd_size = cookie->dmac_size; 4108 return (DDI_SUCCESS); 4109 } 4110 4111 /* 4112 * The window's not a whole multiple of granularity, since we know this 4113 * is due to the sgllen, we need to go back to the last cookie and trim 4114 * that one, add the left over part of the old cookie into the new 4115 * window, and then add in the new cookie into the new window. 4116 */ 4117 4118 /* 4119 * make sure the driver isn't making us do something bad... Trimming and 4120 * sgllen == 1 don't go together. 4121 */ 4122 if (attr->dma_attr_sgllen == 1) { 4123 return (DDI_DMA_NOMAPPING); 4124 } 4125 4126 /* 4127 * first, setup the current window to account for the trim. Need to go 4128 * back to the last cookie for this. 4129 */ 4130 cookie--; 4131 (*windowp)->wd_trim.tr_trim_last = B_TRUE; 4132 (*windowp)->wd_trim.tr_last_cookie = cookie; 4133 (*windowp)->wd_trim.tr_last_paddr = cookie->dmac_laddress; 4134 ASSERT(cookie->dmac_size > trim_sz); 4135 (*windowp)->wd_trim.tr_last_size = cookie->dmac_size - trim_sz; 4136 (*windowp)->wd_size -= trim_sz; 4137 4138 /* save the buffer offsets for the next window */ 4139 coffset = cookie->dmac_size - trim_sz; 4140 new_offset = (*windowp)->wd_offset + (*windowp)->wd_size; 4141 4142 /* 4143 * set this now in case this is the first window. all other cases are 4144 * set in dma_win() 4145 */ 4146 cookie->dmac_size = (*windowp)->wd_trim.tr_last_size; 4147 4148 /* 4149 * initialize the next window using what's left over in the previous 4150 * cookie. 4151 */ 4152 (*windowp)++; 4153 rootnex_init_win(hp, dma, *windowp, cookie, new_offset); 4154 (*windowp)->wd_cookie_cnt++; 4155 (*windowp)->wd_trim.tr_trim_first = B_TRUE; 4156 (*windowp)->wd_trim.tr_first_paddr = cookie->dmac_laddress + coffset; 4157 (*windowp)->wd_trim.tr_first_size = trim_sz; 4158 if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { 4159 (*windowp)->wd_dosync = B_TRUE; 4160 } 4161 4162 /* 4163 * now go back to the current cookie and add it to the new window. set 4164 * the new window size to the what was left over from the previous 4165 * cookie and what's in the current cookie. 4166 */ 4167 cookie++; 4168 (*windowp)->wd_cookie_cnt++; 4169 (*windowp)->wd_size = trim_sz + cookie->dmac_size; 4170 4171 /* 4172 * trim plus the next cookie could put us over maxxfer (a cookie can be 4173 * a max size of maxxfer). Handle that case. 4174 */ 4175 if ((*windowp)->wd_size > dma->dp_maxxfer) { 4176 /* 4177 * maxxfer is already a whole multiple of granularity, and this 4178 * trim will be <= the previous trim (since a cookie can't be 4179 * larger than maxxfer). Make things simple here. 4180 */ 4181 trim_sz = (*windowp)->wd_size - dma->dp_maxxfer; 4182 (*windowp)->wd_trim.tr_trim_last = B_TRUE; 4183 (*windowp)->wd_trim.tr_last_cookie = cookie; 4184 (*windowp)->wd_trim.tr_last_paddr = cookie->dmac_laddress; 4185 (*windowp)->wd_trim.tr_last_size = cookie->dmac_size - trim_sz; 4186 (*windowp)->wd_size -= trim_sz; 4187 ASSERT((*windowp)->wd_size == dma->dp_maxxfer); 4188 4189 /* save the buffer offsets for the next window */ 4190 coffset = cookie->dmac_size - trim_sz; 4191 new_offset = (*windowp)->wd_offset + (*windowp)->wd_size; 4192 4193 /* setup the next window */ 4194 (*windowp)++; 4195 rootnex_init_win(hp, dma, *windowp, cookie, new_offset); 4196 (*windowp)->wd_cookie_cnt++; 4197 (*windowp)->wd_trim.tr_trim_first = B_TRUE; 4198 (*windowp)->wd_trim.tr_first_paddr = cookie->dmac_laddress + 4199 coffset; 4200 (*windowp)->wd_trim.tr_first_size = trim_sz; 4201 } 4202 4203 return (DDI_SUCCESS); 4204 } 4205 4206 4207 /* 4208 * rootnex_copybuf_window_boundary() 4209 * Called in bind slowpath when we get to a window boundary because we used 4210 * up all the copy buffer that we have. 4211 */ 4212 static int 4213 rootnex_copybuf_window_boundary(ddi_dma_impl_t *hp, rootnex_dma_t *dma, 4214 rootnex_window_t **windowp, ddi_dma_cookie_t *cookie, off_t cur_offset, 4215 size_t *copybuf_used) 4216 { 4217 rootnex_sglinfo_t *sinfo; 4218 off_t new_offset; 4219 size_t trim_sz; 4220 paddr_t paddr; 4221 off_t coffset; 4222 uint_t pidx; 4223 off_t poff; 4224 4225 4226 sinfo = &dma->dp_sglinfo; 4227 4228 /* 4229 * the copy buffer should be a whole multiple of page size. We know that 4230 * this cookie is <= MMU_PAGESIZE. 4231 */ 4232 ASSERT(cookie->dmac_size <= MMU_PAGESIZE); 4233 4234 /* 4235 * from now on, all new windows in this bind need to be re-mapped during 4236 * ddi_dma_getwin() (32-bit kernel only). i.e. we ran out out copybuf 4237 * space... 4238 */ 4239 #if !defined(__amd64) 4240 dma->dp_cb_remaping = B_TRUE; 4241 #endif 4242 4243 /* reset copybuf used */ 4244 *copybuf_used = 0; 4245 4246 /* 4247 * if we don't have to trim (since granularity is set to 1), go to the 4248 * next window and add the current cookie to it. We know the current 4249 * cookie uses the copy buffer since we're in this code path. 4250 */ 4251 if (!dma->dp_trim_required) { 4252 (*windowp)++; 4253 rootnex_init_win(hp, dma, *windowp, cookie, cur_offset); 4254 4255 /* Add this cookie to the new window */ 4256 (*windowp)->wd_cookie_cnt++; 4257 (*windowp)->wd_size += cookie->dmac_size; 4258 *copybuf_used += MMU_PAGESIZE; 4259 return (DDI_SUCCESS); 4260 } 4261 4262 /* 4263 * *** may need to trim, figure it out. 4264 */ 4265 4266 /* figure out how much we need to trim from the window */ 4267 if (dma->dp_granularity_power_2) { 4268 trim_sz = (*windowp)->wd_size & 4269 (hp->dmai_attr.dma_attr_granular - 1); 4270 } else { 4271 trim_sz = (*windowp)->wd_size % hp->dmai_attr.dma_attr_granular; 4272 } 4273 4274 /* 4275 * if the window's a whole multiple of granularity, go to the next 4276 * window, init it, then add in the current cookie. We know the current 4277 * cookie uses the copy buffer since we're in this code path. 4278 */ 4279 if (trim_sz == 0) { 4280 (*windowp)++; 4281 rootnex_init_win(hp, dma, *windowp, cookie, cur_offset); 4282 4283 /* Add this cookie to the new window */ 4284 (*windowp)->wd_cookie_cnt++; 4285 (*windowp)->wd_size += cookie->dmac_size; 4286 *copybuf_used += MMU_PAGESIZE; 4287 return (DDI_SUCCESS); 4288 } 4289 4290 /* 4291 * *** We figured it out, we definitly need to trim 4292 */ 4293 4294 /* 4295 * make sure the driver isn't making us do something bad... 4296 * Trimming and sgllen == 1 don't go together. 4297 */ 4298 if (hp->dmai_attr.dma_attr_sgllen == 1) { 4299 return (DDI_DMA_NOMAPPING); 4300 } 4301 4302 /* 4303 * first, setup the current window to account for the trim. Need to go 4304 * back to the last cookie for this. Some of the last cookie will be in 4305 * the current window, and some of the last cookie will be in the new 4306 * window. All of the current cookie will be in the new window. 4307 */ 4308 cookie--; 4309 (*windowp)->wd_trim.tr_trim_last = B_TRUE; 4310 (*windowp)->wd_trim.tr_last_cookie = cookie; 4311 (*windowp)->wd_trim.tr_last_paddr = cookie->dmac_laddress; 4312 ASSERT(cookie->dmac_size > trim_sz); 4313 (*windowp)->wd_trim.tr_last_size = cookie->dmac_size - trim_sz; 4314 (*windowp)->wd_size -= trim_sz; 4315 4316 /* 4317 * we're trimming the last cookie (not the current cookie). So that 4318 * last cookie may have or may not have been using the copy buffer ( 4319 * we know the cookie passed in uses the copy buffer since we're in 4320 * this code path). 4321 * 4322 * If the last cookie doesn't use the copy buffer, nothing special to 4323 * do. However, if it does uses the copy buffer, it will be both the 4324 * last page in the current window and the first page in the next 4325 * window. Since we are reusing the copy buffer (and KVA space on the 4326 * 32-bit kernel), this page will use the end of the copy buffer in the 4327 * current window, and the start of the copy buffer in the next window. 4328 * Track that info... The cookie physical address was already set to 4329 * the copy buffer physical address in setup_cookie.. 4330 */ 4331 if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { 4332 pidx = (sinfo->si_buf_offset + (*windowp)->wd_offset + 4333 (*windowp)->wd_size) >> MMU_PAGESHIFT; 4334 (*windowp)->wd_trim.tr_last_copybuf_win = B_TRUE; 4335 (*windowp)->wd_trim.tr_last_pidx = pidx; 4336 (*windowp)->wd_trim.tr_last_cbaddr = 4337 dma->dp_pgmap[pidx].pm_cbaddr; 4338 #if !defined(__amd64) 4339 (*windowp)->wd_trim.tr_last_kaddr = 4340 dma->dp_pgmap[pidx].pm_kaddr; 4341 #endif 4342 } 4343 4344 /* save the buffer offsets for the next window */ 4345 coffset = cookie->dmac_size - trim_sz; 4346 new_offset = (*windowp)->wd_offset + (*windowp)->wd_size; 4347 4348 /* 4349 * set this now in case this is the first window. all other cases are 4350 * set in dma_win() 4351 */ 4352 cookie->dmac_size = (*windowp)->wd_trim.tr_last_size; 4353 4354 /* 4355 * initialize the next window using what's left over in the previous 4356 * cookie. 4357 */ 4358 (*windowp)++; 4359 rootnex_init_win(hp, dma, *windowp, cookie, new_offset); 4360 (*windowp)->wd_cookie_cnt++; 4361 (*windowp)->wd_trim.tr_trim_first = B_TRUE; 4362 (*windowp)->wd_trim.tr_first_paddr = cookie->dmac_laddress + coffset; 4363 (*windowp)->wd_trim.tr_first_size = trim_sz; 4364 4365 /* 4366 * again, we're tracking if the last cookie uses the copy buffer. 4367 * read the comment above for more info on why we need to track 4368 * additional state. 4369 * 4370 * For the first cookie in the new window, we need reset the physical 4371 * address to DMA into to the start of the copy buffer plus any 4372 * initial page offset which may be present. 4373 */ 4374 if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { 4375 (*windowp)->wd_dosync = B_TRUE; 4376 (*windowp)->wd_trim.tr_first_copybuf_win = B_TRUE; 4377 (*windowp)->wd_trim.tr_first_pidx = pidx; 4378 (*windowp)->wd_trim.tr_first_cbaddr = dma->dp_cbaddr; 4379 poff = (*windowp)->wd_trim.tr_first_paddr & MMU_PAGEOFFSET; 4380 4381 paddr = pfn_to_pa(hat_getpfnum(kas.a_hat, dma->dp_cbaddr)) + 4382 poff; 4383 (*windowp)->wd_trim.tr_first_paddr = 4384 ROOTNEX_PADDR_TO_RBASE(paddr); 4385 4386 #if !defined(__amd64) 4387 (*windowp)->wd_trim.tr_first_kaddr = dma->dp_kva; 4388 #endif 4389 /* account for the cookie copybuf usage in the new window */ 4390 *copybuf_used += MMU_PAGESIZE; 4391 4392 /* 4393 * every piece of code has to have a hack, and here is this 4394 * ones :-) 4395 * 4396 * There is a complex interaction between setup_cookie and the 4397 * copybuf window boundary. The complexity had to be in either 4398 * the maxxfer window, or the copybuf window, and I chose the 4399 * copybuf code. 4400 * 4401 * So in this code path, we have taken the last cookie, 4402 * virtually broken it in half due to the trim, and it happens 4403 * to use the copybuf which further complicates life. At the 4404 * same time, we have already setup the current cookie, which 4405 * is now wrong. More background info: the current cookie uses 4406 * the copybuf, so it is only a page long max. So we need to 4407 * fix the current cookies copy buffer address, physical 4408 * address, and kva for the 32-bit kernel. We due this by 4409 * bumping them by page size (of course, we can't due this on 4410 * the physical address since the copy buffer may not be 4411 * physically contiguous). 4412 */ 4413 cookie++; 4414 dma->dp_pgmap[pidx + 1].pm_cbaddr += MMU_PAGESIZE; 4415 poff = cookie->dmac_laddress & MMU_PAGEOFFSET; 4416 4417 paddr = pfn_to_pa(hat_getpfnum(kas.a_hat, 4418 dma->dp_pgmap[pidx + 1].pm_cbaddr)) + poff; 4419 cookie->dmac_laddress = ROOTNEX_PADDR_TO_RBASE(paddr); 4420 4421 #if !defined(__amd64) 4422 ASSERT(dma->dp_pgmap[pidx + 1].pm_mapped == B_FALSE); 4423 dma->dp_pgmap[pidx + 1].pm_kaddr += MMU_PAGESIZE; 4424 #endif 4425 } else { 4426 /* go back to the current cookie */ 4427 cookie++; 4428 } 4429 4430 /* 4431 * add the current cookie to the new window. set the new window size to 4432 * the what was left over from the previous cookie and what's in the 4433 * current cookie. 4434 */ 4435 (*windowp)->wd_cookie_cnt++; 4436 (*windowp)->wd_size = trim_sz + cookie->dmac_size; 4437 ASSERT((*windowp)->wd_size < dma->dp_maxxfer); 4438 4439 /* 4440 * we know that the cookie passed in always uses the copy buffer. We 4441 * wouldn't be here if it didn't. 4442 */ 4443 *copybuf_used += MMU_PAGESIZE; 4444 4445 return (DDI_SUCCESS); 4446 } 4447 4448 4449 /* 4450 * rootnex_maxxfer_window_boundary() 4451 * Called in bind slowpath when we get to a window boundary because we will 4452 * go over maxxfer. 4453 */ 4454 static int 4455 rootnex_maxxfer_window_boundary(ddi_dma_impl_t *hp, rootnex_dma_t *dma, 4456 rootnex_window_t **windowp, ddi_dma_cookie_t *cookie) 4457 { 4458 size_t dmac_size; 4459 off_t new_offset; 4460 size_t trim_sz; 4461 off_t coffset; 4462 4463 4464 /* 4465 * calculate how much we have to trim off of the current cookie to equal 4466 * maxxfer. We don't have to account for granularity here since our 4467 * maxxfer already takes that into account. 4468 */ 4469 trim_sz = ((*windowp)->wd_size + cookie->dmac_size) - dma->dp_maxxfer; 4470 ASSERT(trim_sz <= cookie->dmac_size); 4471 ASSERT(trim_sz <= dma->dp_maxxfer); 4472 4473 /* save cookie size since we need it later and we might change it */ 4474 dmac_size = cookie->dmac_size; 4475 4476 /* 4477 * if we're not trimming the entire cookie, setup the current window to 4478 * account for the trim. 4479 */ 4480 if (trim_sz < cookie->dmac_size) { 4481 (*windowp)->wd_cookie_cnt++; 4482 (*windowp)->wd_trim.tr_trim_last = B_TRUE; 4483 (*windowp)->wd_trim.tr_last_cookie = cookie; 4484 (*windowp)->wd_trim.tr_last_paddr = cookie->dmac_laddress; 4485 (*windowp)->wd_trim.tr_last_size = cookie->dmac_size - trim_sz; 4486 (*windowp)->wd_size = dma->dp_maxxfer; 4487 4488 /* 4489 * set the adjusted cookie size now in case this is the first 4490 * window. All other windows are taken care of in get win 4491 */ 4492 cookie->dmac_size = (*windowp)->wd_trim.tr_last_size; 4493 } 4494 4495 /* 4496 * coffset is the current offset within the cookie, new_offset is the 4497 * current offset with the entire buffer. 4498 */ 4499 coffset = dmac_size - trim_sz; 4500 new_offset = (*windowp)->wd_offset + (*windowp)->wd_size; 4501 4502 /* initialize the next window */ 4503 (*windowp)++; 4504 rootnex_init_win(hp, dma, *windowp, cookie, new_offset); 4505 (*windowp)->wd_cookie_cnt++; 4506 (*windowp)->wd_size = trim_sz; 4507 if (trim_sz < dmac_size) { 4508 (*windowp)->wd_trim.tr_trim_first = B_TRUE; 4509 (*windowp)->wd_trim.tr_first_paddr = cookie->dmac_laddress + 4510 coffset; 4511 (*windowp)->wd_trim.tr_first_size = trim_sz; 4512 } 4513 4514 return (DDI_SUCCESS); 4515 } 4516 4517 4518 /*ARGSUSED*/ 4519 static int 4520 rootnex_coredma_sync(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, 4521 off_t off, size_t len, uint_t cache_flags) 4522 { 4523 rootnex_sglinfo_t *sinfo; 4524 rootnex_pgmap_t *cbpage; 4525 rootnex_window_t *win; 4526 ddi_dma_impl_t *hp; 4527 rootnex_dma_t *dma; 4528 caddr_t fromaddr; 4529 caddr_t toaddr; 4530 uint_t psize; 4531 off_t offset; 4532 uint_t pidx; 4533 size_t size; 4534 off_t poff; 4535 int e; 4536 4537 4538 hp = (ddi_dma_impl_t *)handle; 4539 dma = (rootnex_dma_t *)hp->dmai_private; 4540 sinfo = &dma->dp_sglinfo; 4541 4542 /* 4543 * if we don't have any windows, we don't need to sync. A copybuf 4544 * will cause us to have at least one window. 4545 */ 4546 if (dma->dp_window == NULL) { 4547 return (DDI_SUCCESS); 4548 } 4549 4550 /* This window may not need to be sync'd */ 4551 win = &dma->dp_window[dma->dp_current_win]; 4552 if (!win->wd_dosync) { 4553 return (DDI_SUCCESS); 4554 } 4555 4556 /* handle off and len special cases */ 4557 if ((off == 0) || (rootnex_sync_ignore_params)) { 4558 offset = win->wd_offset; 4559 } else { 4560 offset = off; 4561 } 4562 if ((len == 0) || (rootnex_sync_ignore_params)) { 4563 size = win->wd_size; 4564 } else { 4565 size = len; 4566 } 4567 4568 /* check the sync args to make sure they make a little sense */ 4569 if (rootnex_sync_check_parms) { 4570 e = rootnex_valid_sync_parms(hp, win, offset, size, 4571 cache_flags); 4572 if (e != DDI_SUCCESS) { 4573 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_SYNC_FAIL]); 4574 return (DDI_FAILURE); 4575 } 4576 } 4577 4578 /* 4579 * special case the first page to handle the offset into the page. The 4580 * offset to the current page for our buffer is the offset into the 4581 * first page of the buffer plus our current offset into the buffer 4582 * itself, masked of course. 4583 */ 4584 poff = (sinfo->si_buf_offset + offset) & MMU_PAGEOFFSET; 4585 psize = MIN((MMU_PAGESIZE - poff), size); 4586 4587 /* go through all the pages that we want to sync */ 4588 while (size > 0) { 4589 /* 4590 * Calculate the page index relative to the start of the buffer. 4591 * The index to the current page for our buffer is the offset 4592 * into the first page of the buffer plus our current offset 4593 * into the buffer itself, shifted of course... 4594 */ 4595 pidx = (sinfo->si_buf_offset + offset) >> MMU_PAGESHIFT; 4596 ASSERT(pidx < sinfo->si_max_pages); 4597 4598 /* 4599 * if this page uses the copy buffer, we need to sync it, 4600 * otherwise, go on to the next page. 4601 */ 4602 cbpage = &dma->dp_pgmap[pidx]; 4603 ASSERT((cbpage->pm_uses_copybuf == B_TRUE) || 4604 (cbpage->pm_uses_copybuf == B_FALSE)); 4605 if (cbpage->pm_uses_copybuf) { 4606 /* cbaddr and kaddr should be page aligned */ 4607 ASSERT(((uintptr_t)cbpage->pm_cbaddr & 4608 MMU_PAGEOFFSET) == 0); 4609 ASSERT(((uintptr_t)cbpage->pm_kaddr & 4610 MMU_PAGEOFFSET) == 0); 4611 4612 /* 4613 * if we're copying for the device, we are going to 4614 * copy from the drivers buffer and to the rootnex 4615 * allocated copy buffer. 4616 */ 4617 if (cache_flags == DDI_DMA_SYNC_FORDEV) { 4618 fromaddr = cbpage->pm_kaddr + poff; 4619 toaddr = cbpage->pm_cbaddr + poff; 4620 ROOTNEX_DPROBE2(rootnex__sync__dev, 4621 dev_info_t *, dma->dp_dip, size_t, psize); 4622 4623 /* 4624 * if we're copying for the cpu/kernel, we are going to 4625 * copy from the rootnex allocated copy buffer to the 4626 * drivers buffer. 4627 */ 4628 } else { 4629 fromaddr = cbpage->pm_cbaddr + poff; 4630 toaddr = cbpage->pm_kaddr + poff; 4631 ROOTNEX_DPROBE2(rootnex__sync__cpu, 4632 dev_info_t *, dma->dp_dip, size_t, psize); 4633 } 4634 4635 bcopy(fromaddr, toaddr, psize); 4636 } 4637 4638 /* 4639 * decrement size until we're done, update our offset into the 4640 * buffer, and get the next page size. 4641 */ 4642 size -= psize; 4643 offset += psize; 4644 psize = MIN(MMU_PAGESIZE, size); 4645 4646 /* page offset is zero for the rest of this loop */ 4647 poff = 0; 4648 } 4649 4650 return (DDI_SUCCESS); 4651 } 4652 4653 /* 4654 * rootnex_dma_sync() 4655 * called from ddi_dma_sync() if DMP_NOSYNC is not set in hp->dmai_rflags. 4656 * We set DMP_NOSYNC if we're not using the copy buffer. If DMP_NOSYNC 4657 * is set, ddi_dma_sync() returns immediately passing back success. 4658 */ 4659 /*ARGSUSED*/ 4660 static int 4661 rootnex_dma_sync(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, 4662 off_t off, size_t len, uint_t cache_flags) 4663 { 4664 #if defined(__amd64) && !defined(__xpv) 4665 if (IOMMU_USED(rdip)) { 4666 return (iommulib_nexdma_sync(dip, rdip, handle, off, len, 4667 cache_flags)); 4668 } 4669 #endif 4670 return (rootnex_coredma_sync(dip, rdip, handle, off, len, 4671 cache_flags)); 4672 } 4673 4674 /* 4675 * rootnex_valid_sync_parms() 4676 * checks the parameters passed to sync to verify they are correct. 4677 */ 4678 static int 4679 rootnex_valid_sync_parms(ddi_dma_impl_t *hp, rootnex_window_t *win, 4680 off_t offset, size_t size, uint_t cache_flags) 4681 { 4682 off_t woffset; 4683 4684 4685 /* 4686 * the first part of the test to make sure the offset passed in is 4687 * within the window. 4688 */ 4689 if (offset < win->wd_offset) { 4690 return (DDI_FAILURE); 4691 } 4692 4693 /* 4694 * second and last part of the test to make sure the offset and length 4695 * passed in is within the window. 4696 */ 4697 woffset = offset - win->wd_offset; 4698 if ((woffset + size) > win->wd_size) { 4699 return (DDI_FAILURE); 4700 } 4701 4702 /* 4703 * if we are sync'ing for the device, the DDI_DMA_WRITE flag should 4704 * be set too. 4705 */ 4706 if ((cache_flags == DDI_DMA_SYNC_FORDEV) && 4707 (hp->dmai_rflags & DDI_DMA_WRITE)) { 4708 return (DDI_SUCCESS); 4709 } 4710 4711 /* 4712 * at this point, either DDI_DMA_SYNC_FORCPU or DDI_DMA_SYNC_FORKERNEL 4713 * should be set. Also DDI_DMA_READ should be set in the flags. 4714 */ 4715 if (((cache_flags == DDI_DMA_SYNC_FORCPU) || 4716 (cache_flags == DDI_DMA_SYNC_FORKERNEL)) && 4717 (hp->dmai_rflags & DDI_DMA_READ)) { 4718 return (DDI_SUCCESS); 4719 } 4720 4721 return (DDI_FAILURE); 4722 } 4723 4724 4725 /*ARGSUSED*/ 4726 static int 4727 rootnex_coredma_win(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, 4728 uint_t win, off_t *offp, size_t *lenp, ddi_dma_cookie_t *cookiep, 4729 uint_t *ccountp) 4730 { 4731 rootnex_window_t *window; 4732 rootnex_trim_t *trim; 4733 ddi_dma_impl_t *hp; 4734 rootnex_dma_t *dma; 4735 ddi_dma_obj_t *dmao; 4736 #if !defined(__amd64) 4737 rootnex_sglinfo_t *sinfo; 4738 rootnex_pgmap_t *pmap; 4739 uint_t pidx; 4740 uint_t pcnt; 4741 off_t poff; 4742 int i; 4743 #endif 4744 4745 4746 hp = (ddi_dma_impl_t *)handle; 4747 dma = (rootnex_dma_t *)hp->dmai_private; 4748 #if !defined(__amd64) 4749 sinfo = &dma->dp_sglinfo; 4750 #endif 4751 4752 /* If we try and get a window which doesn't exist, return failure */ 4753 if (win >= hp->dmai_nwin) { 4754 ROOTNEX_DPROF_INC(&rootnex_cnt[ROOTNEX_CNT_GETWIN_FAIL]); 4755 return (DDI_FAILURE); 4756 } 4757 4758 dmao = dma->dp_dvma_used ? &dma->dp_dma : &dma->dp_dvma; 4759 4760 /* 4761 * if we don't have any windows, and they're asking for the first 4762 * window, setup the cookie pointer to the first cookie in the bind. 4763 * setup our return values, then increment the cookie since we return 4764 * the first cookie on the stack. 4765 */ 4766 if (dma->dp_window == NULL) { 4767 if (win != 0) { 4768 ROOTNEX_DPROF_INC( 4769 &rootnex_cnt[ROOTNEX_CNT_GETWIN_FAIL]); 4770 return (DDI_FAILURE); 4771 } 4772 hp->dmai_cookie = dma->dp_cookies; 4773 *offp = 0; 4774 *lenp = dmao->dmao_size; 4775 *ccountp = dma->dp_sglinfo.si_sgl_size; 4776 *cookiep = hp->dmai_cookie[0]; 4777 hp->dmai_cookie++; 4778 return (DDI_SUCCESS); 4779 } 4780 4781 /* sync the old window before moving on to the new one */ 4782 window = &dma->dp_window[dma->dp_current_win]; 4783 if ((window->wd_dosync) && (hp->dmai_rflags & DDI_DMA_READ)) { 4784 (void) rootnex_coredma_sync(dip, rdip, handle, 0, 0, 4785 DDI_DMA_SYNC_FORCPU); 4786 } 4787 4788 #if !defined(__amd64) 4789 /* 4790 * before we move to the next window, if we need to re-map, unmap all 4791 * the pages in this window. 4792 */ 4793 if (dma->dp_cb_remaping) { 4794 /* 4795 * If we switch to this window again, we'll need to map in 4796 * on the fly next time. 4797 */ 4798 window->wd_remap_copybuf = B_TRUE; 4799 4800 /* 4801 * calculate the page index into the buffer where this window 4802 * starts, and the number of pages this window takes up. 4803 */ 4804 pidx = (sinfo->si_buf_offset + window->wd_offset) >> 4805 MMU_PAGESHIFT; 4806 poff = (sinfo->si_buf_offset + window->wd_offset) & 4807 MMU_PAGEOFFSET; 4808 pcnt = mmu_btopr(window->wd_size + poff); 4809 ASSERT((pidx + pcnt) <= sinfo->si_max_pages); 4810 4811 /* unmap pages which are currently mapped in this window */ 4812 for (i = 0; i < pcnt; i++) { 4813 if (dma->dp_pgmap[pidx].pm_mapped) { 4814 hat_unload(kas.a_hat, 4815 dma->dp_pgmap[pidx].pm_kaddr, MMU_PAGESIZE, 4816 HAT_UNLOAD); 4817 dma->dp_pgmap[pidx].pm_mapped = B_FALSE; 4818 } 4819 pidx++; 4820 } 4821 } 4822 #endif 4823 4824 /* 4825 * Move to the new window. 4826 * NOTE: current_win must be set for sync to work right 4827 */ 4828 dma->dp_current_win = win; 4829 window = &dma->dp_window[win]; 4830 4831 /* if needed, adjust the first and/or last cookies for trim */ 4832 trim = &window->wd_trim; 4833 if (trim->tr_trim_first) { 4834 window->wd_first_cookie->dmac_laddress = trim->tr_first_paddr; 4835 window->wd_first_cookie->dmac_size = trim->tr_first_size; 4836 #if !defined(__amd64) 4837 window->wd_first_cookie->dmac_type = 4838 (window->wd_first_cookie->dmac_type & 4839 ROOTNEX_USES_COPYBUF) + window->wd_offset; 4840 #endif 4841 if (trim->tr_first_copybuf_win) { 4842 dma->dp_pgmap[trim->tr_first_pidx].pm_cbaddr = 4843 trim->tr_first_cbaddr; 4844 #if !defined(__amd64) 4845 dma->dp_pgmap[trim->tr_first_pidx].pm_kaddr = 4846 trim->tr_first_kaddr; 4847 #endif 4848 } 4849 } 4850 if (trim->tr_trim_last) { 4851 trim->tr_last_cookie->dmac_laddress = trim->tr_last_paddr; 4852 trim->tr_last_cookie->dmac_size = trim->tr_last_size; 4853 if (trim->tr_last_copybuf_win) { 4854 dma->dp_pgmap[trim->tr_last_pidx].pm_cbaddr = 4855 trim->tr_last_cbaddr; 4856 #if !defined(__amd64) 4857 dma->dp_pgmap[trim->tr_last_pidx].pm_kaddr = 4858 trim->tr_last_kaddr; 4859 #endif 4860 } 4861 } 4862 4863 /* 4864 * setup the cookie pointer to the first cookie in the window. setup 4865 * our return values, then increment the cookie since we return the 4866 * first cookie on the stack. 4867 */ 4868 hp->dmai_cookie = window->wd_first_cookie; 4869 *offp = window->wd_offset; 4870 *lenp = window->wd_size; 4871 *ccountp = window->wd_cookie_cnt; 4872 *cookiep = hp->dmai_cookie[0]; 4873 hp->dmai_cookie++; 4874 4875 #if !defined(__amd64) 4876 /* re-map copybuf if required for this window */ 4877 if (dma->dp_cb_remaping) { 4878 /* 4879 * calculate the page index into the buffer where this 4880 * window starts. 4881 */ 4882 pidx = (sinfo->si_buf_offset + window->wd_offset) >> 4883 MMU_PAGESHIFT; 4884 ASSERT(pidx < sinfo->si_max_pages); 4885 4886 /* 4887 * the first page can get unmapped if it's shared with the 4888 * previous window. Even if the rest of this window is already 4889 * mapped in, we need to still check this one. 4890 */ 4891 pmap = &dma->dp_pgmap[pidx]; 4892 if ((pmap->pm_uses_copybuf) && (pmap->pm_mapped == B_FALSE)) { 4893 if (pmap->pm_pp != NULL) { 4894 pmap->pm_mapped = B_TRUE; 4895 i86_pp_map(pmap->pm_pp, pmap->pm_kaddr); 4896 } else if (pmap->pm_vaddr != NULL) { 4897 pmap->pm_mapped = B_TRUE; 4898 i86_va_map(pmap->pm_vaddr, sinfo->si_asp, 4899 pmap->pm_kaddr); 4900 } 4901 } 4902 pidx++; 4903 4904 /* map in the rest of the pages if required */ 4905 if (window->wd_remap_copybuf) { 4906 window->wd_remap_copybuf = B_FALSE; 4907 4908 /* figure out many pages this window takes up */ 4909 poff = (sinfo->si_buf_offset + window->wd_offset) & 4910 MMU_PAGEOFFSET; 4911 pcnt = mmu_btopr(window->wd_size + poff); 4912 ASSERT(((pidx - 1) + pcnt) <= sinfo->si_max_pages); 4913 4914 /* map pages which require it */ 4915 for (i = 1; i < pcnt; i++) { 4916 pmap = &dma->dp_pgmap[pidx]; 4917 if (pmap->pm_uses_copybuf) { 4918 ASSERT(pmap->pm_mapped == B_FALSE); 4919 if (pmap->pm_pp != NULL) { 4920 pmap->pm_mapped = B_TRUE; 4921 i86_pp_map(pmap->pm_pp, 4922 pmap->pm_kaddr); 4923 } else if (pmap->pm_vaddr != NULL) { 4924 pmap->pm_mapped = B_TRUE; 4925 i86_va_map(pmap->pm_vaddr, 4926 sinfo->si_asp, 4927 pmap->pm_kaddr); 4928 } 4929 } 4930 pidx++; 4931 } 4932 } 4933 } 4934 #endif 4935 4936 /* if the new window uses the copy buffer, sync it for the device */ 4937 if ((window->wd_dosync) && (hp->dmai_rflags & DDI_DMA_WRITE)) { 4938 (void) rootnex_coredma_sync(dip, rdip, handle, 0, 0, 4939 DDI_DMA_SYNC_FORDEV); 4940 } 4941 4942 return (DDI_SUCCESS); 4943 } 4944 4945 /* 4946 * rootnex_dma_win() 4947 * called from ddi_dma_getwin() 4948 */ 4949 /*ARGSUSED*/ 4950 static int 4951 rootnex_dma_win(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, 4952 uint_t win, off_t *offp, size_t *lenp, ddi_dma_cookie_t *cookiep, 4953 uint_t *ccountp) 4954 { 4955 #if defined(__amd64) && !defined(__xpv) 4956 if (IOMMU_USED(rdip)) { 4957 return (iommulib_nexdma_win(dip, rdip, handle, win, offp, lenp, 4958 cookiep, ccountp)); 4959 } 4960 #endif 4961 4962 return (rootnex_coredma_win(dip, rdip, handle, win, offp, lenp, 4963 cookiep, ccountp)); 4964 } 4965 4966 #if defined(__amd64) && !defined(__xpv) 4967 /*ARGSUSED*/ 4968 static int 4969 rootnex_coredma_hdl_setprivate(dev_info_t *dip, dev_info_t *rdip, 4970 ddi_dma_handle_t handle, void *v) 4971 { 4972 ddi_dma_impl_t *hp; 4973 rootnex_dma_t *dma; 4974 4975 hp = (ddi_dma_impl_t *)handle; 4976 dma = (rootnex_dma_t *)hp->dmai_private; 4977 dma->dp_iommu_private = v; 4978 4979 return (DDI_SUCCESS); 4980 } 4981 4982 /*ARGSUSED*/ 4983 static void * 4984 rootnex_coredma_hdl_getprivate(dev_info_t *dip, dev_info_t *rdip, 4985 ddi_dma_handle_t handle) 4986 { 4987 ddi_dma_impl_t *hp; 4988 rootnex_dma_t *dma; 4989 4990 hp = (ddi_dma_impl_t *)handle; 4991 dma = (rootnex_dma_t *)hp->dmai_private; 4992 4993 return (dma->dp_iommu_private); 4994 } 4995 #endif 4996 4997 /* 4998 * ************************ 4999 * obsoleted dma routines 5000 * ************************ 5001 */ 5002 5003 /* 5004 * rootnex_dma_map() 5005 * called from ddi_dma_setup() 5006 * NO IOMMU in 32 bit mode. The below routines doesn't work in 64 bit mode. 5007 */ 5008 /* ARGSUSED */ 5009 static int 5010 rootnex_dma_map(dev_info_t *dip, dev_info_t *rdip, 5011 struct ddi_dma_req *dmareq, ddi_dma_handle_t *handlep) 5012 { 5013 #if defined(__amd64) 5014 /* 5015 * this interface is not supported in 64-bit x86 kernel. See comment in 5016 * rootnex_dma_mctl() 5017 */ 5018 return (DDI_DMA_NORESOURCES); 5019 5020 #else /* 32-bit x86 kernel */ 5021 ddi_dma_handle_t *lhandlep; 5022 ddi_dma_handle_t lhandle; 5023 ddi_dma_cookie_t cookie; 5024 ddi_dma_attr_t dma_attr; 5025 ddi_dma_lim_t *dma_lim; 5026 uint_t ccnt; 5027 int e; 5028 5029 5030 /* 5031 * if the driver is just testing to see if it's possible to do the bind, 5032 * we'll use local state. Otherwise, use the handle pointer passed in. 5033 */ 5034 if (handlep == NULL) { 5035 lhandlep = &lhandle; 5036 } else { 5037 lhandlep = handlep; 5038 } 5039 5040 /* convert the limit structure to a dma_attr one */ 5041 dma_lim = dmareq->dmar_limits; 5042 dma_attr.dma_attr_version = DMA_ATTR_V0; 5043 dma_attr.dma_attr_addr_lo = dma_lim->dlim_addr_lo; 5044 dma_attr.dma_attr_addr_hi = dma_lim->dlim_addr_hi; 5045 dma_attr.dma_attr_minxfer = dma_lim->dlim_minxfer; 5046 dma_attr.dma_attr_seg = dma_lim->dlim_adreg_max; 5047 dma_attr.dma_attr_count_max = dma_lim->dlim_ctreg_max; 5048 dma_attr.dma_attr_granular = dma_lim->dlim_granular; 5049 dma_attr.dma_attr_sgllen = dma_lim->dlim_sgllen; 5050 dma_attr.dma_attr_maxxfer = dma_lim->dlim_reqsize; 5051 dma_attr.dma_attr_burstsizes = dma_lim->dlim_burstsizes; 5052 dma_attr.dma_attr_align = MMU_PAGESIZE; 5053 dma_attr.dma_attr_flags = 0; 5054 5055 e = rootnex_dma_allochdl(dip, rdip, &dma_attr, dmareq->dmar_fp, 5056 dmareq->dmar_arg, lhandlep); 5057 if (e != DDI_SUCCESS) { 5058 return (e); 5059 } 5060 5061 e = rootnex_dma_bindhdl(dip, rdip, *lhandlep, dmareq, &cookie, &ccnt); 5062 if ((e != DDI_DMA_MAPPED) && (e != DDI_DMA_PARTIAL_MAP)) { 5063 (void) rootnex_dma_freehdl(dip, rdip, *lhandlep); 5064 return (e); 5065 } 5066 5067 /* 5068 * if the driver is just testing to see if it's possible to do the bind, 5069 * free up the local state and return the result. 5070 */ 5071 if (handlep == NULL) { 5072 (void) rootnex_dma_unbindhdl(dip, rdip, *lhandlep); 5073 (void) rootnex_dma_freehdl(dip, rdip, *lhandlep); 5074 if (e == DDI_DMA_MAPPED) { 5075 return (DDI_DMA_MAPOK); 5076 } else { 5077 return (DDI_DMA_NOMAPPING); 5078 } 5079 } 5080 5081 return (e); 5082 #endif /* defined(__amd64) */ 5083 } 5084 5085 /* 5086 * rootnex_dma_mctl() 5087 * 5088 * No IOMMU in 32 bit mode. The below routine doesn't work in 64 bit mode. 5089 */ 5090 /* ARGSUSED */ 5091 static int 5092 rootnex_dma_mctl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, 5093 enum ddi_dma_ctlops request, off_t *offp, size_t *lenp, caddr_t *objpp, 5094 uint_t cache_flags) 5095 { 5096 #if defined(__amd64) 5097 /* 5098 * DDI_DMA_SMEM_ALLOC & DDI_DMA_IOPB_ALLOC we're changed to have a 5099 * common implementation in genunix, so they no longer have x86 5100 * specific functionality which called into dma_ctl. 5101 * 5102 * The rest of the obsoleted interfaces were never supported in the 5103 * 64-bit x86 kernel. For s10, the obsoleted DDI_DMA_SEGTOC interface 5104 * was not ported to the x86 64-bit kernel do to serious x86 rootnex 5105 * implementation issues. 5106 * 5107 * If you can't use DDI_DMA_SEGTOC; DDI_DMA_NEXTSEG, DDI_DMA_FREE, and 5108 * DDI_DMA_NEXTWIN are useless since you can get to the cookie, so we 5109 * reflect that now too... 5110 * 5111 * Even though we fixed the pointer problem in DDI_DMA_SEGTOC, we are 5112 * not going to put this functionality into the 64-bit x86 kernel now. 5113 * It wasn't ported to the 64-bit kernel for s10, no reason to change 5114 * that in a future release. 5115 */ 5116 return (DDI_FAILURE); 5117 5118 #else /* 32-bit x86 kernel */ 5119 ddi_dma_cookie_t lcookie; 5120 ddi_dma_cookie_t *cookie; 5121 rootnex_window_t *window; 5122 ddi_dma_impl_t *hp; 5123 rootnex_dma_t *dma; 5124 uint_t nwin; 5125 uint_t ccnt; 5126 size_t len; 5127 off_t off; 5128 int e; 5129 5130 5131 /* 5132 * DDI_DMA_SEGTOC, DDI_DMA_NEXTSEG, and DDI_DMA_NEXTWIN are a little 5133 * hacky since were optimizing for the current interfaces and so we can 5134 * cleanup the mess in genunix. Hopefully we will remove the this 5135 * obsoleted routines someday soon. 5136 */ 5137 5138 switch (request) { 5139 5140 case DDI_DMA_SEGTOC: /* ddi_dma_segtocookie() */ 5141 hp = (ddi_dma_impl_t *)handle; 5142 cookie = (ddi_dma_cookie_t *)objpp; 5143 5144 /* 5145 * convert segment to cookie. We don't distinguish between the 5146 * two :-) 5147 */ 5148 *cookie = *hp->dmai_cookie; 5149 *lenp = cookie->dmac_size; 5150 *offp = cookie->dmac_type & ~ROOTNEX_USES_COPYBUF; 5151 return (DDI_SUCCESS); 5152 5153 case DDI_DMA_NEXTSEG: /* ddi_dma_nextseg() */ 5154 hp = (ddi_dma_impl_t *)handle; 5155 dma = (rootnex_dma_t *)hp->dmai_private; 5156 5157 if ((*lenp != NULL) && ((uintptr_t)*lenp != (uintptr_t)hp)) { 5158 return (DDI_DMA_STALE); 5159 } 5160 5161 /* handle the case where we don't have any windows */ 5162 if (dma->dp_window == NULL) { 5163 /* 5164 * if seg == NULL, and we don't have any windows, 5165 * return the first cookie in the sgl. 5166 */ 5167 if (*lenp == NULL) { 5168 dma->dp_current_cookie = 0; 5169 hp->dmai_cookie = dma->dp_cookies; 5170 *objpp = (caddr_t)handle; 5171 return (DDI_SUCCESS); 5172 5173 /* if we have more cookies, go to the next cookie */ 5174 } else { 5175 if ((dma->dp_current_cookie + 1) >= 5176 dma->dp_sglinfo.si_sgl_size) { 5177 return (DDI_DMA_DONE); 5178 } 5179 dma->dp_current_cookie++; 5180 hp->dmai_cookie++; 5181 return (DDI_SUCCESS); 5182 } 5183 } 5184 5185 /* We have one or more windows */ 5186 window = &dma->dp_window[dma->dp_current_win]; 5187 5188 /* 5189 * if seg == NULL, return the first cookie in the current 5190 * window 5191 */ 5192 if (*lenp == NULL) { 5193 dma->dp_current_cookie = 0; 5194 hp->dmai_cookie = window->wd_first_cookie; 5195 5196 /* 5197 * go to the next cookie in the window then see if we done with 5198 * this window. 5199 */ 5200 } else { 5201 if ((dma->dp_current_cookie + 1) >= 5202 window->wd_cookie_cnt) { 5203 return (DDI_DMA_DONE); 5204 } 5205 dma->dp_current_cookie++; 5206 hp->dmai_cookie++; 5207 } 5208 *objpp = (caddr_t)handle; 5209 return (DDI_SUCCESS); 5210 5211 case DDI_DMA_NEXTWIN: /* ddi_dma_nextwin() */ 5212 hp = (ddi_dma_impl_t *)handle; 5213 dma = (rootnex_dma_t *)hp->dmai_private; 5214 5215 if ((*offp != NULL) && ((uintptr_t)*offp != (uintptr_t)hp)) { 5216 return (DDI_DMA_STALE); 5217 } 5218 5219 /* if win == NULL, return the first window in the bind */ 5220 if (*offp == NULL) { 5221 nwin = 0; 5222 5223 /* 5224 * else, go to the next window then see if we're done with all 5225 * the windows. 5226 */ 5227 } else { 5228 nwin = dma->dp_current_win + 1; 5229 if (nwin >= hp->dmai_nwin) { 5230 return (DDI_DMA_DONE); 5231 } 5232 } 5233 5234 /* switch to the next window */ 5235 e = rootnex_dma_win(dip, rdip, handle, nwin, &off, &len, 5236 &lcookie, &ccnt); 5237 ASSERT(e == DDI_SUCCESS); 5238 if (e != DDI_SUCCESS) { 5239 return (DDI_DMA_STALE); 5240 } 5241 5242 /* reset the cookie back to the first cookie in the window */ 5243 if (dma->dp_window != NULL) { 5244 window = &dma->dp_window[dma->dp_current_win]; 5245 hp->dmai_cookie = window->wd_first_cookie; 5246 } else { 5247 hp->dmai_cookie = dma->dp_cookies; 5248 } 5249 5250 *objpp = (caddr_t)handle; 5251 return (DDI_SUCCESS); 5252 5253 case DDI_DMA_FREE: /* ddi_dma_free() */ 5254 (void) rootnex_dma_unbindhdl(dip, rdip, handle); 5255 (void) rootnex_dma_freehdl(dip, rdip, handle); 5256 if (rootnex_state->r_dvma_call_list_id) { 5257 ddi_run_callback(&rootnex_state->r_dvma_call_list_id); 5258 } 5259 return (DDI_SUCCESS); 5260 5261 case DDI_DMA_IOPB_ALLOC: /* get contiguous DMA-able memory */ 5262 case DDI_DMA_SMEM_ALLOC: /* get contiguous DMA-able memory */ 5263 /* should never get here, handled in genunix */ 5264 ASSERT(0); 5265 return (DDI_FAILURE); 5266 5267 case DDI_DMA_KVADDR: 5268 case DDI_DMA_GETERR: 5269 case DDI_DMA_COFF: 5270 return (DDI_FAILURE); 5271 } 5272 5273 return (DDI_FAILURE); 5274 #endif /* defined(__amd64) */ 5275 } 5276 5277 /* 5278 * ********* 5279 * FMA Code 5280 * ********* 5281 */ 5282 5283 /* 5284 * rootnex_fm_init() 5285 * FMA init busop 5286 */ 5287 /* ARGSUSED */ 5288 static int 5289 rootnex_fm_init(dev_info_t *dip, dev_info_t *tdip, int tcap, 5290 ddi_iblock_cookie_t *ibc) 5291 { 5292 *ibc = rootnex_state->r_err_ibc; 5293 5294 return (ddi_system_fmcap); 5295 } 5296 5297 /* 5298 * rootnex_dma_check() 5299 * Function called after a dma fault occurred to find out whether the 5300 * fault address is associated with a driver that is able to handle faults 5301 * and recover from faults. 5302 */ 5303 /* ARGSUSED */ 5304 static int 5305 rootnex_dma_check(dev_info_t *dip, const void *handle, const void *addr, 5306 const void *not_used) 5307 { 5308 rootnex_window_t *window; 5309 uint64_t start_addr; 5310 uint64_t fault_addr; 5311 ddi_dma_impl_t *hp; 5312 rootnex_dma_t *dma; 5313 uint64_t end_addr; 5314 size_t csize; 5315 int i; 5316 int j; 5317 5318 5319 /* The driver has to set DDI_DMA_FLAGERR to recover from dma faults */ 5320 hp = (ddi_dma_impl_t *)handle; 5321 ASSERT(hp); 5322 5323 dma = (rootnex_dma_t *)hp->dmai_private; 5324 5325 /* Get the address that we need to search for */ 5326 fault_addr = *(uint64_t *)addr; 5327 5328 /* 5329 * if we don't have any windows, we can just walk through all the 5330 * cookies. 5331 */ 5332 if (dma->dp_window == NULL) { 5333 /* for each cookie */ 5334 for (i = 0; i < dma->dp_sglinfo.si_sgl_size; i++) { 5335 /* 5336 * if the faulted address is within the physical address 5337 * range of the cookie, return DDI_FM_NONFATAL. 5338 */ 5339 if ((fault_addr >= dma->dp_cookies[i].dmac_laddress) && 5340 (fault_addr <= (dma->dp_cookies[i].dmac_laddress + 5341 dma->dp_cookies[i].dmac_size))) { 5342 return (DDI_FM_NONFATAL); 5343 } 5344 } 5345 5346 /* fault_addr not within this DMA handle */ 5347 return (DDI_FM_UNKNOWN); 5348 } 5349 5350 /* we have mutiple windows, walk through each window */ 5351 for (i = 0; i < hp->dmai_nwin; i++) { 5352 window = &dma->dp_window[i]; 5353 5354 /* Go through all the cookies in the window */ 5355 for (j = 0; j < window->wd_cookie_cnt; j++) { 5356 5357 start_addr = window->wd_first_cookie[j].dmac_laddress; 5358 csize = window->wd_first_cookie[j].dmac_size; 5359 5360 /* 5361 * if we are trimming the first cookie in the window, 5362 * and this is the first cookie, adjust the start 5363 * address and size of the cookie to account for the 5364 * trim. 5365 */ 5366 if (window->wd_trim.tr_trim_first && (j == 0)) { 5367 start_addr = window->wd_trim.tr_first_paddr; 5368 csize = window->wd_trim.tr_first_size; 5369 } 5370 5371 /* 5372 * if we are trimming the last cookie in the window, 5373 * and this is the last cookie, adjust the start 5374 * address and size of the cookie to account for the 5375 * trim. 5376 */ 5377 if (window->wd_trim.tr_trim_last && 5378 (j == (window->wd_cookie_cnt - 1))) { 5379 start_addr = window->wd_trim.tr_last_paddr; 5380 csize = window->wd_trim.tr_last_size; 5381 } 5382 5383 end_addr = start_addr + csize; 5384 5385 /* 5386 * if the faulted address is within the physical 5387 * address of the cookie, return DDI_FM_NONFATAL. 5388 */ 5389 if ((fault_addr >= start_addr) && 5390 (fault_addr <= end_addr)) { 5391 return (DDI_FM_NONFATAL); 5392 } 5393 } 5394 } 5395 5396 /* fault_addr not within this DMA handle */ 5397 return (DDI_FM_UNKNOWN); 5398 } 5399 5400 /*ARGSUSED*/ 5401 static int 5402 rootnex_quiesce(dev_info_t *dip) 5403 { 5404 #if defined(__amd64) && !defined(__xpv) 5405 return (immu_quiesce()); 5406 #else 5407 return (DDI_SUCCESS); 5408 #endif 5409 } 5410 5411 #if defined(__xpv) 5412 void 5413 immu_init(void) 5414 { 5415 ; 5416 } 5417 5418 void 5419 immu_startup(void) 5420 { 5421 ; 5422 } 5423 /*ARGSUSED*/ 5424 void 5425 immu_physmem_update(uint64_t addr, uint64_t size) 5426 { 5427 ; 5428 } 5429 #endif 5430