Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/vmd/vmd.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2021 Alexander Motin <mav@FreeBSD.org> 5 * Copyright 2019 Cisco Systems, Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/types.h> 34 #include <sys/param.h> 35 #include <sys/bus.h> 36 #include <sys/conf.h> 37 #include <sys/kernel.h> 38 #include <sys/limits.h> 39 #include <sys/module.h> 40 #include <sys/sysctl.h> 41 #include <sys/systm.h> 42 #include <sys/malloc.h> 43 44 #include <machine/bus.h> 45 #include <machine/resource.h> 46 #include <machine/intr_machdep.h> 47 #include <sys/rman.h> 48 #include <sys/lock.h> 49 #include <sys/mutex.h> 50 51 #include <sys/pciio.h> 52 #include <dev/pci/pcivar.h> 53 #include <dev/pci/pcireg.h> 54 #include <dev/pci/pci_private.h> 55 #include <dev/pci/pcib_private.h> 56 57 #include <dev/vmd/vmd.h> 58 59 #include "pcib_if.h" 60 61 struct vmd_type { 62 u_int16_t vmd_vid; 63 u_int16_t vmd_did; 64 char *vmd_name; 65 int flags; 66 #define BUS_RESTRICT 1 67 #define VECTOR_OFFSET 2 68 #define CAN_BYPASS_MSI 4 69 }; 70 71 #define VMD_CAP 0x40 72 #define VMD_BUS_RESTRICT 0x1 73 74 #define VMD_CONFIG 0x44 75 #define VMD_BYPASS_MSI 0x2 76 #define VMD_BUS_START(x) ((x >> 8) & 0x3) 77 78 #define VMD_LOCK 0x70 79 80 SYSCTL_NODE(_hw, OID_AUTO, vmd, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 81 "Intel Volume Management Device tuning parameters"); 82 83 /* 84 * By default all VMD devices remap children MSI/MSI-X interrupts into their 85 * own. It creates additional isolation, but also complicates things due to 86 * sharing, etc. Fortunately some VMD devices can bypass the remapping. 87 */ 88 static int vmd_bypass_msi = 1; 89 SYSCTL_INT(_hw_vmd, OID_AUTO, bypass_msi, CTLFLAG_RWTUN, &vmd_bypass_msi, 0, 90 "Bypass MSI remapping on capable hardware"); 91 92 /* 93 * All MSIs within a group share address, so VMD can't distinguish them. 94 * It makes no sense to use more than one per device, only if required by 95 * some specific device drivers. 96 */ 97 static int vmd_max_msi = 1; 98 SYSCTL_INT(_hw_vmd, OID_AUTO, max_msi, CTLFLAG_RWTUN, &vmd_max_msi, 0, 99 "Maximum number of MSI vectors per device"); 100 101 /* 102 * MSI-X can use different addresses, but we have limited number of MSI-X 103 * we can route to, so use conservative default to try to avoid sharing. 104 */ 105 static int vmd_max_msix = 3; 106 SYSCTL_INT(_hw_vmd, OID_AUTO, max_msix, CTLFLAG_RWTUN, &vmd_max_msix, 0, 107 "Maximum number of MSI-X vectors per device"); 108 109 static struct vmd_type vmd_devs[] = { 110 { 0x8086, 0x201d, "Intel Volume Management Device", 0 }, 111 { 0x8086, 0x28c0, "Intel Volume Management Device", BUS_RESTRICT | CAN_BYPASS_MSI }, 112 { 0x8086, 0x467f, "Intel Volume Management Device", BUS_RESTRICT | VECTOR_OFFSET }, 113 { 0x8086, 0x4c3d, "Intel Volume Management Device", BUS_RESTRICT | VECTOR_OFFSET }, 114 { 0x8086, 0x7d0b, "Intel Volume Management Device", BUS_RESTRICT | VECTOR_OFFSET }, 115 { 0x8086, 0x9a0b, "Intel Volume Management Device", BUS_RESTRICT | VECTOR_OFFSET }, 116 { 0x8086, 0xa77f, "Intel Volume Management Device", BUS_RESTRICT | VECTOR_OFFSET }, 117 { 0x8086, 0xad0b, "Intel Volume Management Device", BUS_RESTRICT | VECTOR_OFFSET }, 118 { 0, 0, NULL, 0 } 119 }; 120 121 static int 122 vmd_probe(device_t dev) 123 { 124 struct vmd_type *t; 125 uint16_t vid, did; 126 127 vid = pci_get_vendor(dev); 128 did = pci_get_device(dev); 129 for (t = vmd_devs; t->vmd_name != NULL; t++) { 130 if (vid == t->vmd_vid && did == t->vmd_did) { 131 device_set_desc(dev, t->vmd_name); 132 return (BUS_PROBE_DEFAULT); 133 } 134 } 135 return (ENXIO); 136 } 137 138 static void 139 vmd_free(struct vmd_softc *sc) 140 { 141 struct vmd_irq *vi; 142 struct vmd_irq_user *u; 143 int i; 144 145 if (sc->psc.bus.rman.rm_end != 0) 146 rman_fini(&sc->psc.bus.rman); 147 if (sc->psc.mem.rman.rm_end != 0) 148 rman_fini(&sc->psc.mem.rman); 149 while ((u = LIST_FIRST(&sc->vmd_users)) != NULL) { 150 LIST_REMOVE(u, viu_link); 151 free(u, M_DEVBUF); 152 } 153 if (sc->vmd_irq != NULL) { 154 for (i = 0; i < sc->vmd_msix_count; i++) { 155 vi = &sc->vmd_irq[i]; 156 if (vi->vi_res == NULL) 157 continue; 158 bus_teardown_intr(sc->psc.dev, vi->vi_res, 159 vi->vi_handle); 160 bus_release_resource(sc->psc.dev, SYS_RES_IRQ, 161 vi->vi_rid, vi->vi_res); 162 } 163 } 164 free(sc->vmd_irq, M_DEVBUF); 165 sc->vmd_irq = NULL; 166 pci_release_msi(sc->psc.dev); 167 for (i = 0; i < VMD_MAX_BAR; i++) { 168 if (sc->vmd_regs_res[i] != NULL) 169 bus_release_resource(sc->psc.dev, SYS_RES_MEMORY, 170 sc->vmd_regs_rid[i], sc->vmd_regs_res[i]); 171 } 172 } 173 174 /* Hidden PCI Roots are hidden in BAR(0). */ 175 176 static uint32_t 177 vmd_read_config(device_t dev, u_int b, u_int s, u_int f, u_int reg, int width) 178 { 179 struct vmd_softc *sc; 180 bus_addr_t offset; 181 182 sc = device_get_softc(dev); 183 if (b < sc->vmd_bus_start || b > sc->vmd_bus_end) 184 return (0xffffffff); 185 186 offset = ((b - sc->vmd_bus_start) << 20) + (s << 15) + (f << 12) + reg; 187 188 switch (width) { 189 case 4: 190 return (bus_space_read_4(sc->vmd_btag, sc->vmd_bhandle, 191 offset)); 192 case 2: 193 return (bus_space_read_2(sc->vmd_btag, sc->vmd_bhandle, 194 offset)); 195 case 1: 196 return (bus_space_read_1(sc->vmd_btag, sc->vmd_bhandle, 197 offset)); 198 default: 199 __assert_unreachable(); 200 return (0xffffffff); 201 } 202 } 203 204 static void 205 vmd_write_config(device_t dev, u_int b, u_int s, u_int f, u_int reg, 206 uint32_t val, int width) 207 { 208 struct vmd_softc *sc; 209 bus_addr_t offset; 210 211 sc = device_get_softc(dev); 212 if (b < sc->vmd_bus_start || b > sc->vmd_bus_end) 213 return; 214 215 offset = ((b - sc->vmd_bus_start) << 20) + (s << 15) + (f << 12) + reg; 216 217 switch (width) { 218 case 4: 219 return (bus_space_write_4(sc->vmd_btag, sc->vmd_bhandle, 220 offset, val)); 221 case 2: 222 return (bus_space_write_2(sc->vmd_btag, sc->vmd_bhandle, 223 offset, val)); 224 case 1: 225 return (bus_space_write_1(sc->vmd_btag, sc->vmd_bhandle, 226 offset, val)); 227 default: 228 __assert_unreachable(); 229 } 230 } 231 232 static void 233 vmd_set_msi_bypass(device_t dev, bool enable) 234 { 235 uint16_t val; 236 237 val = pci_read_config(dev, VMD_CONFIG, 2); 238 if (enable) 239 val |= VMD_BYPASS_MSI; 240 else 241 val &= ~VMD_BYPASS_MSI; 242 pci_write_config(dev, VMD_CONFIG, val, 2); 243 } 244 245 static int 246 vmd_intr(void *arg) 247 { 248 /* 249 * We have nothing to do here, but we have to register some interrupt 250 * handler to make PCI code setup and enable the MSI-X vector. 251 */ 252 return (FILTER_STRAY); 253 } 254 255 static int 256 vmd_attach(device_t dev) 257 { 258 struct vmd_softc *sc; 259 struct pcib_secbus *bus; 260 struct pcib_window *w; 261 struct vmd_type *t; 262 struct vmd_irq *vi; 263 uint16_t vid, did; 264 uint32_t bar; 265 int i, j, error; 266 char buf[64]; 267 268 sc = device_get_softc(dev); 269 bzero(sc, sizeof(*sc)); 270 sc->psc.dev = dev; 271 sc->psc.domain = PCI_DOMAINMAX - device_get_unit(dev); 272 273 pci_enable_busmaster(dev); 274 275 for (i = 0, j = 0; i < VMD_MAX_BAR; i++, j++) { 276 sc->vmd_regs_rid[i] = PCIR_BAR(j); 277 bar = pci_read_config(dev, PCIR_BAR(0), 4); 278 if (PCI_BAR_MEM(bar) && (bar & PCIM_BAR_MEM_TYPE) == 279 PCIM_BAR_MEM_64) 280 j++; 281 if ((sc->vmd_regs_res[i] = bus_alloc_resource_any(dev, 282 SYS_RES_MEMORY, &sc->vmd_regs_rid[i], RF_ACTIVE)) == NULL) { 283 device_printf(dev, "Cannot allocate resources\n"); 284 goto fail; 285 } 286 } 287 288 sc->vmd_btag = rman_get_bustag(sc->vmd_regs_res[0]); 289 sc->vmd_bhandle = rman_get_bushandle(sc->vmd_regs_res[0]); 290 291 vid = pci_get_vendor(dev); 292 did = pci_get_device(dev); 293 for (t = vmd_devs; t->vmd_name != NULL; t++) { 294 if (vid == t->vmd_vid && did == t->vmd_did) 295 break; 296 } 297 298 sc->vmd_bus_start = 0; 299 if ((t->flags & BUS_RESTRICT) && 300 (pci_read_config(dev, VMD_CAP, 2) & VMD_BUS_RESTRICT)) { 301 switch (VMD_BUS_START(pci_read_config(dev, VMD_CONFIG, 2))) { 302 case 0: 303 sc->vmd_bus_start = 0; 304 break; 305 case 1: 306 sc->vmd_bus_start = 128; 307 break; 308 case 2: 309 sc->vmd_bus_start = 224; 310 break; 311 default: 312 device_printf(dev, "Unknown bus offset\n"); 313 goto fail; 314 } 315 } 316 sc->vmd_bus_end = MIN(PCI_BUSMAX, sc->vmd_bus_start + 317 (rman_get_size(sc->vmd_regs_res[0]) >> 20) - 1); 318 319 bus = &sc->psc.bus; 320 bus->sec = sc->vmd_bus_start; 321 bus->sub = sc->vmd_bus_end; 322 bus->dev = dev; 323 bus->rman.rm_start = 0; 324 bus->rman.rm_end = PCI_BUSMAX; 325 bus->rman.rm_type = RMAN_ARRAY; 326 snprintf(buf, sizeof(buf), "%s bus numbers", device_get_nameunit(dev)); 327 bus->rman.rm_descr = strdup(buf, M_DEVBUF); 328 error = rman_init(&bus->rman); 329 if (error) { 330 device_printf(dev, "Failed to initialize bus rman\n"); 331 bus->rman.rm_end = 0; 332 goto fail; 333 } 334 error = rman_manage_region(&bus->rman, sc->vmd_bus_start, 335 sc->vmd_bus_end); 336 if (error) { 337 device_printf(dev, "Failed to add resource to bus rman\n"); 338 goto fail; 339 } 340 341 w = &sc->psc.mem; 342 w->rman.rm_type = RMAN_ARRAY; 343 snprintf(buf, sizeof(buf), "%s memory window", device_get_nameunit(dev)); 344 w->rman.rm_descr = strdup(buf, M_DEVBUF); 345 error = rman_init(&w->rman); 346 if (error) { 347 device_printf(dev, "Failed to initialize memory rman\n"); 348 w->rman.rm_end = 0; 349 goto fail; 350 } 351 error = rman_manage_region(&w->rman, 352 rman_get_start(sc->vmd_regs_res[1]), 353 rman_get_end(sc->vmd_regs_res[1])); 354 if (error) { 355 device_printf(dev, "Failed to add resource to memory rman\n"); 356 goto fail; 357 } 358 error = rman_manage_region(&w->rman, 359 rman_get_start(sc->vmd_regs_res[2]) + 0x2000, 360 rman_get_end(sc->vmd_regs_res[2])); 361 if (error) { 362 device_printf(dev, "Failed to add resource to memory rman\n"); 363 goto fail; 364 } 365 366 LIST_INIT(&sc->vmd_users); 367 sc->vmd_fist_vector = (t->flags & VECTOR_OFFSET) ? 1 : 0; 368 sc->vmd_msix_count = pci_msix_count(dev); 369 if (vmd_bypass_msi && (t->flags & CAN_BYPASS_MSI)) { 370 sc->vmd_msix_count = 0; 371 vmd_set_msi_bypass(dev, true); 372 } else if (pci_alloc_msix(dev, &sc->vmd_msix_count) == 0) { 373 sc->vmd_irq = malloc(sizeof(struct vmd_irq) * 374 sc->vmd_msix_count, M_DEVBUF, M_WAITOK | M_ZERO); 375 for (i = 0; i < sc->vmd_msix_count; i++) { 376 vi = &sc->vmd_irq[i]; 377 vi->vi_rid = i + 1; 378 vi->vi_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 379 &vi->vi_rid, RF_ACTIVE | RF_SHAREABLE); 380 if (vi->vi_res == NULL) { 381 device_printf(dev, "Failed to allocate irq\n"); 382 goto fail; 383 } 384 vi->vi_irq = rman_get_start(vi->vi_res); 385 if (bus_setup_intr(dev, vi->vi_res, INTR_TYPE_MISC | 386 INTR_MPSAFE, vmd_intr, NULL, vi, &vi->vi_handle)) { 387 device_printf(dev, "Can't set up interrupt\n"); 388 bus_release_resource(dev, SYS_RES_IRQ, 389 vi->vi_rid, vi->vi_res); 390 vi->vi_res = NULL; 391 goto fail; 392 } 393 } 394 vmd_set_msi_bypass(dev, false); 395 } 396 397 sc->vmd_dma_tag = bus_get_dma_tag(dev); 398 399 sc->psc.child = device_add_child(dev, "pci", -1); 400 return (bus_generic_attach(dev)); 401 402 fail: 403 vmd_free(sc); 404 return (ENXIO); 405 } 406 407 static int 408 vmd_detach(device_t dev) 409 { 410 struct vmd_softc *sc = device_get_softc(dev); 411 int error; 412 413 error = bus_generic_detach(dev); 414 if (error) 415 return (error); 416 error = device_delete_children(dev); 417 if (error) 418 return (error); 419 if (sc->vmd_msix_count == 0) 420 vmd_set_msi_bypass(dev, false); 421 vmd_free(sc); 422 return (0); 423 } 424 425 static bus_dma_tag_t 426 vmd_get_dma_tag(device_t dev, device_t child) 427 { 428 struct vmd_softc *sc = device_get_softc(dev); 429 430 return (sc->vmd_dma_tag); 431 } 432 433 static struct resource * 434 vmd_alloc_resource(device_t dev, device_t child, int type, int *rid, 435 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 436 { 437 struct vmd_softc *sc = device_get_softc(dev); 438 struct resource *res; 439 440 switch (type) { 441 case SYS_RES_IRQ: 442 /* VMD harwdare does not support legacy interrupts. */ 443 if (*rid == 0) 444 return (NULL); 445 return (bus_generic_alloc_resource(dev, child, type, rid, 446 start, end, count, flags | RF_SHAREABLE)); 447 case SYS_RES_MEMORY: 448 res = rman_reserve_resource(&sc->psc.mem.rman, start, end, 449 count, flags, child); 450 if (res == NULL) 451 return (NULL); 452 if (bootverbose) 453 device_printf(dev, 454 "allocated memory range (%#jx-%#jx) for rid %d of %s\n", 455 rman_get_start(res), rman_get_end(res), *rid, 456 pcib_child_name(child)); 457 break; 458 case PCI_RES_BUS: 459 res = rman_reserve_resource(&sc->psc.bus.rman, start, end, 460 count, flags, child); 461 if (res == NULL) 462 return (NULL); 463 if (bootverbose) 464 device_printf(dev, 465 "allocated bus range (%ju-%ju) for rid %d of %s\n", 466 rman_get_start(res), rman_get_end(res), *rid, 467 pcib_child_name(child)); 468 break; 469 default: 470 /* VMD harwdare does not support I/O ports. */ 471 return (NULL); 472 } 473 rman_set_rid(res, *rid); 474 return (res); 475 } 476 477 static int 478 vmd_adjust_resource(device_t dev, device_t child, int type, 479 struct resource *r, rman_res_t start, rman_res_t end) 480 { 481 482 if (type == SYS_RES_IRQ) { 483 return (bus_generic_adjust_resource(dev, child, type, r, 484 start, end)); 485 } 486 return (rman_adjust_resource(r, start, end)); 487 } 488 489 static int 490 vmd_release_resource(device_t dev, device_t child, int type, int rid, 491 struct resource *r) 492 { 493 494 if (type == SYS_RES_IRQ) { 495 return (bus_generic_release_resource(dev, child, type, rid, 496 r)); 497 } 498 return (rman_release_resource(r)); 499 } 500 501 static int 502 vmd_route_interrupt(device_t dev, device_t child, int pin) 503 { 504 505 /* VMD harwdare does not support legacy interrupts. */ 506 return (PCI_INVALID_IRQ); 507 } 508 509 static int 510 vmd_alloc_msi(device_t dev, device_t child, int count, int maxcount, 511 int *irqs) 512 { 513 struct vmd_softc *sc = device_get_softc(dev); 514 struct vmd_irq_user *u; 515 int i, ibest = 0, best = INT_MAX; 516 517 if (sc->vmd_msix_count == 0) { 518 return (PCIB_ALLOC_MSI(device_get_parent(device_get_parent(dev)), 519 child, count, maxcount, irqs)); 520 } 521 522 if (count > vmd_max_msi) 523 return (ENOSPC); 524 LIST_FOREACH(u, &sc->vmd_users, viu_link) { 525 if (u->viu_child == child) 526 return (EBUSY); 527 } 528 529 for (i = sc->vmd_fist_vector; i < sc->vmd_msix_count; i++) { 530 if (best > sc->vmd_irq[i].vi_nusers) { 531 best = sc->vmd_irq[i].vi_nusers; 532 ibest = i; 533 } 534 } 535 536 u = malloc(sizeof(*u), M_DEVBUF, M_WAITOK | M_ZERO); 537 u->viu_child = child; 538 u->viu_vector = ibest; 539 LIST_INSERT_HEAD(&sc->vmd_users, u, viu_link); 540 sc->vmd_irq[ibest].vi_nusers += count; 541 542 for (i = 0; i < count; i++) 543 irqs[i] = sc->vmd_irq[ibest].vi_irq; 544 return (0); 545 } 546 547 static int 548 vmd_release_msi(device_t dev, device_t child, int count, int *irqs) 549 { 550 struct vmd_softc *sc = device_get_softc(dev); 551 struct vmd_irq_user *u; 552 553 if (sc->vmd_msix_count == 0) { 554 return (PCIB_RELEASE_MSI(device_get_parent(device_get_parent(dev)), 555 child, count, irqs)); 556 } 557 558 LIST_FOREACH(u, &sc->vmd_users, viu_link) { 559 if (u->viu_child == child) { 560 sc->vmd_irq[u->viu_vector].vi_nusers -= count; 561 LIST_REMOVE(u, viu_link); 562 free(u, M_DEVBUF); 563 return (0); 564 } 565 } 566 return (EINVAL); 567 } 568 569 static int 570 vmd_alloc_msix(device_t dev, device_t child, int *irq) 571 { 572 struct vmd_softc *sc = device_get_softc(dev); 573 struct vmd_irq_user *u; 574 int i, ibest = 0, best = INT_MAX; 575 576 if (sc->vmd_msix_count == 0) { 577 return (PCIB_ALLOC_MSIX(device_get_parent(device_get_parent(dev)), 578 child, irq)); 579 } 580 581 i = 0; 582 LIST_FOREACH(u, &sc->vmd_users, viu_link) { 583 if (u->viu_child == child) 584 i++; 585 } 586 if (i >= vmd_max_msix) 587 return (ENOSPC); 588 589 for (i = sc->vmd_fist_vector; i < sc->vmd_msix_count; i++) { 590 if (best > sc->vmd_irq[i].vi_nusers) { 591 best = sc->vmd_irq[i].vi_nusers; 592 ibest = i; 593 } 594 } 595 596 u = malloc(sizeof(*u), M_DEVBUF, M_WAITOK | M_ZERO); 597 u->viu_child = child; 598 u->viu_vector = ibest; 599 LIST_INSERT_HEAD(&sc->vmd_users, u, viu_link); 600 sc->vmd_irq[ibest].vi_nusers++; 601 602 *irq = sc->vmd_irq[ibest].vi_irq; 603 return (0); 604 } 605 606 static int 607 vmd_release_msix(device_t dev, device_t child, int irq) 608 { 609 struct vmd_softc *sc = device_get_softc(dev); 610 struct vmd_irq_user *u; 611 612 if (sc->vmd_msix_count == 0) { 613 return (PCIB_RELEASE_MSIX(device_get_parent(device_get_parent(dev)), 614 child, irq)); 615 } 616 617 LIST_FOREACH(u, &sc->vmd_users, viu_link) { 618 if (u->viu_child == child && 619 sc->vmd_irq[u->viu_vector].vi_irq == irq) { 620 sc->vmd_irq[u->viu_vector].vi_nusers--; 621 LIST_REMOVE(u, viu_link); 622 free(u, M_DEVBUF); 623 return (0); 624 } 625 } 626 return (EINVAL); 627 } 628 629 static int 630 vmd_map_msi(device_t dev, device_t child, int irq, uint64_t *addr, uint32_t *data) 631 { 632 struct vmd_softc *sc = device_get_softc(dev); 633 int i; 634 635 if (sc->vmd_msix_count == 0) { 636 return (PCIB_MAP_MSI(device_get_parent(device_get_parent(dev)), 637 child, irq, addr, data)); 638 } 639 640 for (i = sc->vmd_fist_vector; i < sc->vmd_msix_count; i++) { 641 if (sc->vmd_irq[i].vi_irq == irq) 642 break; 643 } 644 if (i >= sc->vmd_msix_count) 645 return (EINVAL); 646 *addr = MSI_INTEL_ADDR_BASE | (i << 12); 647 *data = 0; 648 return (0); 649 } 650 651 static device_method_t vmd_pci_methods[] = { 652 /* Device interface */ 653 DEVMETHOD(device_probe, vmd_probe), 654 DEVMETHOD(device_attach, vmd_attach), 655 DEVMETHOD(device_detach, vmd_detach), 656 DEVMETHOD(device_suspend, bus_generic_suspend), 657 DEVMETHOD(device_resume, bus_generic_resume), 658 DEVMETHOD(device_shutdown, bus_generic_shutdown), 659 660 /* Bus interface */ 661 DEVMETHOD(bus_get_dma_tag, vmd_get_dma_tag), 662 DEVMETHOD(bus_read_ivar, pcib_read_ivar), 663 DEVMETHOD(bus_write_ivar, pcib_write_ivar), 664 DEVMETHOD(bus_alloc_resource, vmd_alloc_resource), 665 DEVMETHOD(bus_adjust_resource, vmd_adjust_resource), 666 DEVMETHOD(bus_release_resource, vmd_release_resource), 667 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 668 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 669 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 670 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 671 672 /* pcib interface */ 673 DEVMETHOD(pcib_maxslots, pcib_maxslots), 674 DEVMETHOD(pcib_read_config, vmd_read_config), 675 DEVMETHOD(pcib_write_config, vmd_write_config), 676 DEVMETHOD(pcib_route_interrupt, vmd_route_interrupt), 677 DEVMETHOD(pcib_alloc_msi, vmd_alloc_msi), 678 DEVMETHOD(pcib_release_msi, vmd_release_msi), 679 DEVMETHOD(pcib_alloc_msix, vmd_alloc_msix), 680 DEVMETHOD(pcib_release_msix, vmd_release_msix), 681 DEVMETHOD(pcib_map_msi, vmd_map_msi), 682 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow), 683 684 DEVMETHOD_END 685 }; 686 687 DEFINE_CLASS_0(pcib, vmd_pci_driver, vmd_pci_methods, sizeof(struct vmd_softc)); 688 DRIVER_MODULE(vmd, pci, vmd_pci_driver, NULL, NULL); 689 MODULE_PNP_INFO("U16:vendor;U16:device;D:#", pci, vmd, 690 vmd_devs, nitems(vmd_devs) - 1);
Cache object: 5d8ae1df296f64d7b075f032626958e2
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]