Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/arm/nvidia/drm2/tegra_host1x.c
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1 /*- 2 * Copyright (c) 2015 Michal Meloun 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/bus.h> 33 #include <sys/clock.h> 34 #include <sys/kernel.h> 35 #include <sys/limits.h> 36 #include <sys/lock.h> 37 38 #include <sys/module.h> 39 #include <sys/resource.h> 40 #include <sys/sx.h> 41 #include <sys/rman.h> 42 43 #include <machine/bus.h> 44 #include <machine/resource.h> 45 46 #include <dev/extres/clk/clk.h> 47 #include <dev/extres/hwreset/hwreset.h> 48 #include <dev/drm2/drmP.h> 49 #include <dev/drm2/drm_crtc_helper.h> 50 #include <dev/drm2/drm_fb_helper.h> 51 #include <dev/fdt/simplebus.h> 52 #include <dev/ofw/ofw_bus.h> 53 #include <dev/ofw/ofw_bus_subr.h> 54 55 #include <arm/nvidia/drm2/tegra_drm.h> 56 57 #include "fb_if.h" 58 #include "tegra_drm_if.h" 59 60 #define WR4(_sc, _r, _v) bus_rite_4((_sc)->mem_res, (_r), (_v)) 61 #define RD4(_sc, _r) bus_read_4((_sc)->mem_res, (_r)) 62 63 #define LOCK(_sc) sx_xlock(&(_sc)->lock) 64 #define UNLOCK(_sc) sx_xunlock(&(_sc)->lock) 65 #define SLEEP(_sc, timeout) sx_sleep(sc, &sc->lock, 0, "host1x", timeout); 66 #define LOCK_INIT(_sc) sx_init(&_sc->lock, "host1x") 67 #define LOCK_DESTROY(_sc) sx_destroy(&_sc->lock) 68 #define ASSERT_LOCKED(_sc) sx_assert(&_sc->lock, SA_LOCKED) 69 #define ASSERT_UNLOCKED(_sc) sx_assert(&_sc->lock, SA_UNLOCKED) 70 71 static struct ofw_compat_data compat_data[] = { 72 {"nvidia,tegra124-host1x", 1}, 73 {NULL, 0} 74 }; 75 76 #define DRIVER_NAME "tegra" 77 #define DRIVER_DESC "NVIDIA Tegra TK1" 78 #define DRIVER_DATE "20151101" 79 #define DRIVER_MAJOR 0 80 #define DRIVER_MINOR 0 81 #define DRIVER_PATCHLEVEL 0 82 83 struct client_info; 84 TAILQ_HEAD(client_list, client_info); 85 typedef struct client_list client_list_t; 86 87 struct client_info { 88 TAILQ_ENTRY(client_info) list_e; 89 device_t client; 90 int activated; 91 }; 92 93 struct host1x_softc { 94 struct simplebus_softc simplebus_sc; /* must be first */ 95 device_t dev; 96 struct sx lock; 97 int attach_done; 98 99 struct resource *mem_res; 100 struct resource *syncpt_irq_res; 101 void *syncpt_irq_h; 102 struct resource *gen_irq_res; 103 void *gen_irq_h; 104 105 clk_t clk; 106 hwreset_t reset; 107 struct intr_config_hook irq_hook; 108 109 int drm_inited; 110 client_list_t clients; 111 112 struct tegra_drm *tegra_drm; 113 }; 114 115 static void 116 host1x_output_poll_changed(struct drm_device *drm_dev) 117 { 118 struct tegra_drm *drm; 119 120 drm = container_of(drm_dev, struct tegra_drm, drm_dev); 121 if (drm->fb != NULL) 122 drm_fb_helper_hotplug_event(&drm->fb->fb_helper); 123 } 124 125 static const struct drm_mode_config_funcs mode_config_funcs = { 126 .fb_create = tegra_drm_fb_create, 127 .output_poll_changed = host1x_output_poll_changed, 128 }; 129 130 static int 131 host1x_drm_init(struct host1x_softc *sc) 132 { 133 struct client_info *entry; 134 int rv; 135 136 LOCK(sc); 137 138 TAILQ_FOREACH(entry, &sc->clients, list_e) { 139 if (entry->activated) 140 continue; 141 rv = TEGRA_DRM_INIT_CLIENT(entry->client, sc->dev, 142 sc->tegra_drm); 143 if (rv != 0) { 144 device_printf(sc->dev, 145 "Cannot init DRM client %s: %d\n", 146 device_get_name(entry->client), rv); 147 return (rv); 148 } 149 entry->activated = 1; 150 } 151 UNLOCK(sc); 152 153 return (0); 154 } 155 156 static int 157 host1x_drm_exit(struct host1x_softc *sc) 158 { 159 struct client_info *entry; 160 int rv; 161 #ifdef FREEBSD_NOTYET 162 struct drm_device *dev, *tmp; 163 #endif 164 LOCK(sc); 165 if (!sc->drm_inited) { 166 UNLOCK(sc); 167 return (0); 168 } 169 TAILQ_FOREACH_REVERSE(entry, &sc->clients, client_list, list_e) { 170 if (!entry->activated) 171 continue; 172 rv = TEGRA_DRM_EXIT_CLIENT(entry->client, sc->dev, 173 sc->tegra_drm); 174 if (rv != 0) { 175 device_printf(sc->dev, 176 "Cannot exit DRM client %s: %d\n", 177 device_get_name(entry->client), rv); 178 } 179 entry->activated = 0; 180 } 181 182 #ifdef FREEBSD_NOTYET 183 list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item) 184 drm_put_dev(dev); 185 #endif 186 sc->drm_inited = 0; 187 UNLOCK(sc); 188 189 return (0); 190 } 191 192 static int 193 host1x_drm_load(struct drm_device *drm_dev, unsigned long flags) 194 { 195 struct host1x_softc *sc; 196 int rv; 197 198 sc = device_get_softc(drm_dev->dev); 199 200 drm_mode_config_init(drm_dev); 201 drm_dev->mode_config.min_width = 32; 202 drm_dev->mode_config.min_height = 32; 203 drm_dev->mode_config.max_width = 4096; 204 drm_dev->mode_config.max_height = 4096; 205 drm_dev->mode_config.funcs = &mode_config_funcs; 206 207 rv = host1x_drm_init(sc); 208 if (rv != 0) 209 goto fail_host1x; 210 211 drm_dev->irq_enabled = true; 212 drm_dev->max_vblank_count = 0xffffffff; 213 drm_dev->vblank_disable_allowed = true; 214 215 rv = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc); 216 if (rv != 0) 217 goto fail_vblank; 218 219 drm_mode_config_reset(drm_dev); 220 221 rv = tegra_drm_fb_init(drm_dev); 222 if (rv != 0) 223 goto fail_fb; 224 drm_kms_helper_poll_init(drm_dev); 225 226 return (0); 227 228 fail_fb: 229 tegra_drm_fb_destroy(drm_dev); 230 drm_vblank_cleanup(drm_dev); 231 fail_vblank: 232 host1x_drm_exit(sc); 233 fail_host1x: 234 drm_mode_config_cleanup(drm_dev); 235 236 return (rv); 237 } 238 239 static int 240 host1x_drm_unload(struct drm_device *drm_dev) 241 { 242 struct host1x_softc *sc; 243 int rv; 244 245 sc = device_get_softc(drm_dev->dev); 246 247 drm_kms_helper_poll_fini(drm_dev); 248 tegra_drm_fb_destroy(drm_dev); 249 drm_mode_config_cleanup(drm_dev); 250 251 rv = host1x_drm_exit(sc); 252 if (rv < 0) 253 return (rv); 254 return (0); 255 } 256 257 static int 258 host1x_drm_open(struct drm_device *drm_dev, struct drm_file *filp) 259 { 260 261 return (0); 262 } 263 264 static void 265 tegra_drm_preclose(struct drm_device *drm, struct drm_file *file) 266 { 267 struct drm_crtc *crtc; 268 269 list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) 270 tegra_dc_cancel_page_flip(crtc, file); 271 } 272 273 static void 274 host1x_drm_lastclose(struct drm_device *drm_dev) 275 { 276 277 struct tegra_drm *drm; 278 279 drm = container_of(drm_dev, struct tegra_drm, drm_dev); 280 if (drm->fb != NULL) 281 drm_fb_helper_restore_fbdev_mode(&drm->fb->fb_helper); 282 } 283 284 static int 285 host1x_drm_enable_vblank(struct drm_device *drm_dev, int pipe) 286 { 287 struct drm_crtc *crtc; 288 289 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 290 if (pipe == tegra_dc_get_pipe(crtc)) { 291 tegra_dc_enable_vblank(crtc); 292 return (0); 293 } 294 } 295 return (-ENODEV); 296 } 297 298 static void 299 host1x_drm_disable_vblank(struct drm_device *drm_dev, int pipe) 300 { 301 struct drm_crtc *crtc; 302 303 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 304 if (pipe == tegra_dc_get_pipe(crtc)) { 305 tegra_dc_disable_vblank(crtc); 306 return; 307 } 308 } 309 } 310 311 static struct drm_ioctl_desc host1x_drm_ioctls[] = { 312 }; 313 314 struct drm_driver tegra_drm_driver = { 315 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, 316 .load = host1x_drm_load, 317 .unload = host1x_drm_unload, 318 .open = host1x_drm_open, 319 .preclose = tegra_drm_preclose, 320 .lastclose = host1x_drm_lastclose, 321 322 .get_vblank_counter = drm_vblank_count, 323 .enable_vblank = host1x_drm_enable_vblank, 324 .disable_vblank = host1x_drm_disable_vblank, 325 326 /* Fields filled by tegra_bo_driver_register() 327 .gem_free_object 328 .gem_pager_ops 329 .dumb_create 330 .dumb_map_offset 331 .dumb_destroy 332 */ 333 .ioctls = host1x_drm_ioctls, 334 .num_ioctls = nitems(host1x_drm_ioctls), 335 336 .name = DRIVER_NAME, 337 .desc = DRIVER_DESC, 338 .date = DRIVER_DATE, 339 .major = DRIVER_MAJOR, 340 .minor = DRIVER_MINOR, 341 .patchlevel = DRIVER_PATCHLEVEL, 342 }; 343 344 /* 345 * ----------------- Device methods ------------------------- 346 */ 347 static void 348 host1x_irq_hook(void *arg) 349 { 350 struct host1x_softc *sc; 351 int rv; 352 353 sc = arg; 354 config_intrhook_disestablish(&sc->irq_hook); 355 356 tegra_bo_driver_register(&tegra_drm_driver); 357 rv = drm_get_platform_dev(sc->dev, &sc->tegra_drm->drm_dev, 358 &tegra_drm_driver); 359 if (rv != 0) { 360 device_printf(sc->dev, "drm_get_platform_dev(): %d\n", rv); 361 return; 362 } 363 364 sc->drm_inited = 1; 365 } 366 367 static struct fb_info * 368 host1x_fb_helper_getinfo(device_t dev) 369 { 370 struct host1x_softc *sc; 371 372 sc = device_get_softc(dev); 373 if (sc->tegra_drm == NULL) 374 return (NULL); 375 return (tegra_drm_fb_getinfo(&sc->tegra_drm->drm_dev)); 376 } 377 378 static int 379 host1x_register_client(device_t dev, device_t client) 380 { 381 struct host1x_softc *sc; 382 struct client_info *entry; 383 384 sc = device_get_softc(dev); 385 386 entry = malloc(sizeof(struct client_info), M_DEVBUF, M_WAITOK | M_ZERO); 387 entry->client = client; 388 entry->activated = 0; 389 390 LOCK(sc); 391 TAILQ_INSERT_TAIL(&sc->clients, entry, list_e); 392 UNLOCK(sc); 393 394 return (0); 395 } 396 397 static int 398 host1x_deregister_client(device_t dev, device_t client) 399 { 400 struct host1x_softc *sc; 401 struct client_info *entry; 402 403 sc = device_get_softc(dev); 404 405 LOCK(sc); 406 TAILQ_FOREACH(entry, &sc->clients, list_e) { 407 if (entry->client == client) { 408 if (entry->activated) 409 panic("Tegra DRM: Attempt to deregister " 410 "activated client"); 411 TAILQ_REMOVE(&sc->clients, entry, list_e); 412 free(entry, M_DEVBUF); 413 UNLOCK(sc); 414 return (0); 415 } 416 } 417 UNLOCK(sc); 418 419 return (0); 420 } 421 422 static void 423 host1x_gen_intr(void *arg) 424 { 425 struct host1x_softc *sc; 426 427 sc = (struct host1x_softc *)arg; 428 LOCK(sc); 429 UNLOCK(sc); 430 } 431 432 static void 433 host1x_syncpt_intr(void *arg) 434 { 435 struct host1x_softc *sc; 436 437 sc = (struct host1x_softc *)arg; 438 LOCK(sc); 439 UNLOCK(sc); 440 } 441 442 static void 443 host1x_new_pass(device_t dev) 444 { 445 struct host1x_softc *sc; 446 int rv, rid; 447 phandle_t node; 448 449 /* 450 * We attach during BUS_PASS_BUS (because we must overcome simplebus), 451 * but some of our FDT resources are not ready until BUS_PASS_DEFAULT 452 */ 453 sc = device_get_softc(dev); 454 if (sc->attach_done || bus_current_pass < BUS_PASS_DEFAULT) { 455 bus_generic_new_pass(dev); 456 return; 457 } 458 459 sc->attach_done = 1; 460 node = ofw_bus_get_node(dev); 461 462 /* Allocate our IRQ resource. */ 463 rid = 0; 464 sc->syncpt_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 465 RF_ACTIVE); 466 if (sc->syncpt_irq_res == NULL) { 467 device_printf(dev, "Cannot allocate interrupt.\n"); 468 rv = ENXIO; 469 goto fail; 470 } 471 rid = 1; 472 sc->gen_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 473 RF_ACTIVE); 474 if (sc->gen_irq_res == NULL) { 475 device_printf(dev, "Cannot allocate interrupt.\n"); 476 rv = ENXIO; 477 goto fail; 478 } 479 480 /* FDT resources */ 481 rv = hwreset_get_by_ofw_name(sc->dev, 0, "host1x", &sc->reset); 482 if (rv != 0) { 483 device_printf(dev, "Cannot get fuse reset\n"); 484 goto fail; 485 } 486 rv = clk_get_by_ofw_index(sc->dev, 0, 0, &sc->clk); 487 if (rv != 0) { 488 device_printf(dev, "Cannot get i2c clock: %d\n", rv); 489 goto fail; 490 } 491 492 rv = clk_enable(sc->clk); 493 if (rv != 0) { 494 device_printf(dev, "Cannot enable clock: %d\n", rv); 495 goto fail; 496 } 497 rv = hwreset_deassert(sc->reset); 498 if (rv != 0) { 499 device_printf(sc->dev, "Cannot clear reset\n"); 500 goto fail; 501 } 502 503 /* Setup interrupts */ 504 rv = bus_setup_intr(dev, sc->gen_irq_res, 505 INTR_TYPE_MISC | INTR_MPSAFE, NULL, host1x_gen_intr, 506 sc, &sc->gen_irq_h); 507 if (rv) { 508 device_printf(dev, "Cannot setup gen interrupt.\n"); 509 goto fail; 510 } 511 512 rv = bus_setup_intr(dev, sc->syncpt_irq_res, 513 INTR_TYPE_MISC | INTR_MPSAFE, NULL, host1x_syncpt_intr, 514 sc, &sc->syncpt_irq_h); 515 if (rv) { 516 device_printf(dev, "Cannot setup syncpt interrupt.\n"); 517 goto fail; 518 } 519 520 simplebus_init(dev, 0); 521 for (node = OF_child(node); node > 0; node = OF_peer(node)) 522 simplebus_add_device(dev, node, 0, NULL, -1, NULL); 523 524 sc->irq_hook.ich_func = host1x_irq_hook; 525 sc->irq_hook.ich_arg = sc; 526 config_intrhook_establish(&sc->irq_hook); 527 bus_generic_new_pass(dev); 528 return; 529 530 fail: 531 device_detach(dev); 532 return; 533 } 534 535 static int 536 host1x_probe(device_t dev) 537 { 538 539 if (!ofw_bus_status_okay(dev)) 540 return (ENXIO); 541 542 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 543 return (ENXIO); 544 545 return (BUS_PROBE_DEFAULT); 546 } 547 548 static int 549 host1x_attach(device_t dev) 550 { 551 int rv, rid; 552 struct host1x_softc *sc; 553 554 sc = device_get_softc(dev); 555 sc->tegra_drm = malloc(sizeof(struct tegra_drm), DRM_MEM_DRIVER, 556 M_WAITOK | M_ZERO); 557 558 /* crosslink together all worlds */ 559 sc->dev = dev; 560 sc->tegra_drm->drm_dev.dev_private = &sc->tegra_drm; 561 sc->tegra_drm->drm_dev.dev = dev; 562 563 TAILQ_INIT(&sc->clients); 564 565 LOCK_INIT(sc); 566 567 /* Get the memory resource for the register mapping. */ 568 rid = 0; 569 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 570 RF_ACTIVE); 571 if (sc->mem_res == NULL) { 572 device_printf(dev, "Cannot map registers.\n"); 573 rv = ENXIO; 574 goto fail; 575 } 576 577 return (bus_generic_attach(dev)); 578 579 fail: 580 if (sc->tegra_drm != NULL) 581 free(sc->tegra_drm, DRM_MEM_DRIVER); 582 if (sc->mem_res != NULL) 583 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res); 584 LOCK_DESTROY(sc); 585 return (rv); 586 } 587 588 static int 589 host1x_detach(device_t dev) 590 { 591 struct host1x_softc *sc; 592 593 sc = device_get_softc(dev); 594 595 host1x_drm_exit(sc); 596 597 if (sc->gen_irq_h != NULL) 598 bus_teardown_intr(dev, sc->gen_irq_res, sc->gen_irq_h); 599 if (sc->tegra_drm != NULL) 600 free(sc->tegra_drm, DRM_MEM_DRIVER); 601 if (sc->clk != NULL) 602 clk_release(sc->clk); 603 if (sc->reset != NULL) 604 hwreset_release(sc->reset); 605 if (sc->syncpt_irq_h != NULL) 606 bus_teardown_intr(dev, sc->syncpt_irq_res, sc->syncpt_irq_h); 607 if (sc->gen_irq_res != NULL) 608 bus_release_resource(dev, SYS_RES_IRQ, 1, sc->gen_irq_res); 609 if (sc->syncpt_irq_res != NULL) 610 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->syncpt_irq_res); 611 if (sc->mem_res != NULL) 612 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res); 613 LOCK_DESTROY(sc); 614 return (bus_generic_detach(dev)); 615 } 616 617 static device_method_t host1x_methods[] = { 618 /* Device interface */ 619 DEVMETHOD(device_probe, host1x_probe), 620 DEVMETHOD(device_attach, host1x_attach), 621 DEVMETHOD(device_detach, host1x_detach), 622 623 /* Bus interface */ 624 DEVMETHOD(bus_new_pass, host1x_new_pass), 625 626 /* Framebuffer service methods */ 627 DEVMETHOD(fb_getinfo, host1x_fb_helper_getinfo), 628 629 /* tegra drm interface */ 630 DEVMETHOD(tegra_drm_register_client, host1x_register_client), 631 DEVMETHOD(tegra_drm_deregister_client, host1x_deregister_client), 632 633 DEVMETHOD_END 634 }; 635 636 DEFINE_CLASS_1(host1x, host1x_driver, host1x_methods, 637 sizeof(struct host1x_softc), simplebus_driver); 638 EARLY_DRIVER_MODULE(host1x, simplebus, host1x_driver, 0, 0, BUS_PASS_BUS); 639 640 /* Bindings for fbd device. */ 641 extern driver_t fbd_driver; 642 DRIVER_MODULE(fbd, host1x, fbd_driver, 0, 0);
Cache object: 897a84670367cd60f31eb5756f16b602
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