grf.c revision 1.16
1 /* $NetBSD: grf.c,v 1.16 1999/06/27 14:13:14 minoura Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: grf.c 1.36 93/08/13$ 41 * 42 * @(#)grf.c 8.4 (Berkeley) 1/12/94 43 */ 44 45 /* 46 * Graphics display driver for the X68K machines. 47 * This is the hardware-independent portion of the driver. 48 * Hardware access is through the machine dependent grf switch routines. 49 */ 50 51 #include "opt_compat_hpux.h" 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/device.h> 56 #include <sys/proc.h> 57 #include <sys/resourcevar.h> 58 #include <sys/ioctl.h> 59 #include <sys/file.h> 60 #include <sys/malloc.h> 61 #include <sys/vnode.h> 62 #include <sys/mman.h> 63 #include <sys/poll.h> 64 #include <sys/conf.h> 65 66 #include <machine/grfioctl.h> 67 68 #include <x68k/dev/grfvar.h> 69 #include <x68k/dev/itevar.h> 70 71 #include <machine/cpu.h> 72 73 #ifdef COMPAT_HPUX 74 #include <compat/hpux/hpux.h> 75 extern struct emul emul_hpux; 76 #endif 77 78 #include <vm/vm.h> 79 #include <vm/vm_kern.h> 80 #include <vm/vm_page.h> 81 #include <vm/vm_pager.h> 82 83 #include <uvm/uvm_extern.h> 84 #include <uvm/uvm_map.h> 85 86 #include <miscfs/specfs/specdev.h> 87 88 #include "ite.h" 89 #if NITE == 0 90 #define iteon(u,f) 91 #define iteoff(u,f) 92 #define ite_reinit(u) 93 #endif 94 95 #ifdef DEBUG 96 int grfdebug = 0; 97 #define GDB_DEVNO 0x01 98 #define GDB_MMAP 0x02 99 #define GDB_IOMAP 0x04 100 #define GDB_LOCK 0x08 101 #endif 102 103 cdev_decl(grf); 104 int grfon __P((dev_t)); 105 int grfoff __P((dev_t)); 106 int grfaddr __P((struct grf_softc *, int)); 107 int grfmap __P((dev_t, caddr_t *, struct proc *)); 108 int grfunmap __P((dev_t, caddr_t, struct proc *)); 109 110 extern struct cfdriver grf_cd; 111 112 /*ARGSUSED*/ 113 int 114 grfopen(dev, flags, mode, p) 115 dev_t dev; 116 int flags, mode; 117 struct proc *p; 118 { 119 int unit = GRFUNIT(dev); 120 register struct grf_softc *gp; 121 int error = 0; 122 123 if (unit >= grf_cd.cd_ndevs || 124 (gp = grf_cd.cd_devs[unit]) == NULL || 125 (gp->g_flags & GF_ALIVE) == 0) 126 return (ENXIO); 127 128 if ((gp->g_flags & (GF_OPEN|GF_EXCLUDE)) == (GF_OPEN|GF_EXCLUDE)) 129 return(EBUSY); 130 #ifdef COMPAT_HPUX 131 /* 132 * XXX: cannot handle both HPUX and BSD processes at the same time 133 */ 134 if (p->p_emul == &emul_hpux) 135 if (gp->g_flags & GF_BSDOPEN) 136 return(EBUSY); 137 else 138 gp->g_flags |= GF_HPUXOPEN; 139 else 140 if (gp->g_flags & GF_HPUXOPEN) 141 return(EBUSY); 142 else 143 gp->g_flags |= GF_BSDOPEN; 144 #endif 145 /* 146 * First open. 147 * XXX: always put in graphics mode. 148 */ 149 error = 0; 150 if ((gp->g_flags & GF_OPEN) == 0) { 151 gp->g_flags |= GF_OPEN; 152 error = grfon(dev); 153 } 154 return(error); 155 } 156 157 /*ARGSUSED*/ 158 int 159 grfclose(dev, flags, mode, p) 160 dev_t dev; 161 int flags, mode; 162 struct proc *p; 163 { 164 register struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)]; 165 166 if ((gp->g_flags & GF_ALIVE) == 0) 167 return (ENXIO); 168 169 (void) grfoff(dev); 170 #ifdef COMPAT_HPUX 171 (void) grfunlock(gp); 172 #endif 173 gp->g_flags &= GF_ALIVE; 174 return(0); 175 } 176 177 /*ARGSUSED*/ 178 int 179 grfioctl(dev, cmd, data, flag, p) 180 dev_t dev; 181 u_long cmd; 182 caddr_t data; 183 int flag; 184 struct proc *p; 185 { 186 int unit = GRFUNIT(dev); 187 register struct grf_softc *gp = grf_cd.cd_devs[unit]; 188 int error; 189 190 if ((gp->g_flags & GF_ALIVE) == 0) 191 return (ENXIO); 192 193 #ifdef COMPAT_HPUX 194 if (p->p_emul == &emul_hpux) 195 return(hpuxgrfioctl(dev, cmd, data, flag, p)); 196 #endif 197 error = 0; 198 switch (cmd) { 199 200 case GRFIOCGINFO: 201 bcopy((caddr_t)&gp->g_display, data, sizeof(struct grfinfo)); 202 break; 203 204 case GRFIOCON: 205 error = grfon(dev); 206 break; 207 208 case GRFIOCOFF: 209 error = grfoff(dev); 210 break; 211 212 case GRFIOCMAP: 213 error = grfmap(dev, (caddr_t *)data, p); 214 break; 215 216 case GRFIOCUNMAP: 217 error = grfunmap(dev, *(caddr_t *)data, p); 218 break; 219 220 case GRFSETVMODE: 221 error = (*gp->g_sw->gd_mode)(gp, GM_GRFSETVMODE, data); 222 if (error == 0) 223 ite_reinit(unit); 224 break; 225 226 default: 227 error = EINVAL; 228 break; 229 230 } 231 return(error); 232 } 233 234 /*ARGSUSED*/ 235 int 236 grfpoll(dev, events, p) 237 dev_t dev; 238 int events; 239 struct proc *p; 240 { 241 242 return (events & (POLLOUT | POLLWRNORM)); 243 } 244 245 /*ARGSUSED*/ 246 int 247 grfmmap(dev, off, prot) 248 dev_t dev; 249 int off, prot; 250 { 251 252 return (grfaddr(grf_cd.cd_devs[GRFUNIT(dev)], off)); 253 } 254 255 int 256 grfon(dev) 257 dev_t dev; 258 { 259 int unit = GRFUNIT(dev); 260 struct grf_softc *gp = grf_cd.cd_devs[unit]; 261 262 /* 263 * XXX: iteoff call relies on devices being in same order 264 * as ITEs and the fact that iteoff only uses the minor part 265 * of the dev arg. 266 */ 267 iteoff(unit, 2); 268 return((*gp->g_sw->gd_mode)(gp, 269 (dev&GRFOVDEV) ? GM_GRFOVON : GM_GRFON, 270 (caddr_t)0)); 271 } 272 273 int 274 grfoff(dev) 275 dev_t dev; 276 { 277 int unit = GRFUNIT(dev); 278 struct grf_softc *gp = grf_cd.cd_devs[unit]; 279 int error; 280 281 (void) grfunmap(dev, (caddr_t)0, curproc); 282 error = (*gp->g_sw->gd_mode)(gp, 283 (dev&GRFOVDEV) ? GM_GRFOVOFF : GM_GRFOFF, 284 (caddr_t)0); 285 /* XXX: see comment for iteoff above */ 286 iteon(unit, 2); 287 return(error); 288 } 289 290 int 291 grfaddr(gp, off) 292 struct grf_softc *gp; 293 register int off; 294 { 295 register struct grfinfo *gi = &gp->g_display; 296 297 /* control registers */ 298 if (off >= 0 && off < gi->gd_regsize) 299 return(((u_int)gi->gd_regaddr + off) >> PGSHIFT); 300 301 /* frame buffer */ 302 if (off >= gi->gd_regsize && off < gi->gd_regsize+gi->gd_fbsize) { 303 off -= gi->gd_regsize; 304 return(((u_int)gi->gd_fbaddr + off) >> PGSHIFT); 305 } 306 /* bogus */ 307 return(-1); 308 } 309 310 /* 311 * HP-UX compatibility routines 312 */ 313 #ifdef COMPAT_HPUX 314 315 /*ARGSUSED*/ 316 int 317 hpuxgrfioctl(dev, cmd, data, flag, p) 318 dev_t dev; 319 int cmd; 320 caddr_t data; 321 int flag; 322 struct proc *p; 323 { 324 register struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)]; 325 int error; 326 327 error = 0; 328 switch (cmd) { 329 330 case GCID: 331 *(int *)data = gp->g_display.gd_id; 332 break; 333 334 case GCON: 335 error = grfon(dev); 336 break; 337 338 case GCOFF: 339 error = grfoff(dev); 340 break; 341 342 case GCLOCK: 343 error = grflock(gp, 1); 344 break; 345 346 case GCUNLOCK: 347 error = grfunlock(gp); 348 break; 349 350 case GCAON: 351 case GCAOFF: 352 break; 353 354 /* GCSTATIC is implied by our implementation */ 355 case GCSTATIC_CMAP: 356 case GCVARIABLE_CMAP: 357 break; 358 359 /* map in control regs and frame buffer */ 360 case GCMAP: 361 error = grfmap(dev, (caddr_t *)data, p); 362 break; 363 364 case GCUNMAP: 365 error = grfunmap(dev, *(caddr_t *)data, p); 366 /* XXX: HP-UX uses GCUNMAP to get rid of GCSLOT memory */ 367 if (error) 368 error = grflckunmmap(dev, *(caddr_t *)data); 369 break; 370 371 case GCSLOT: 372 { 373 struct grf_slot *sp = (struct grf_slot *)data; 374 375 sp->slot = grffindpid(gp); 376 if (sp->slot) { 377 error = grflckmmap(dev, (caddr_t *)&sp->addr); 378 if (error && gp->g_pid) { 379 free((caddr_t)gp->g_pid, M_DEVBUF); 380 gp->g_pid = NULL; 381 } 382 } else 383 error = EINVAL; /* XXX */ 384 break; 385 } 386 387 case GCDESCRIBE: 388 error = (*gp->g_sw->gd_mode)(gp, GM_DESCRIBE, data); 389 break; 390 391 /* 392 * XXX: only used right now to map in rbox control registers 393 * Will be replaced in the future with a real IOMAP interface. 394 */ 395 case IOMAPMAP: 396 error = iommap(dev, (caddr_t *)data); 397 #if 0 398 /* 399 * It may not be worth kludging this (using p_devtmp) to 400 * make this work. It was an undocumented side-effect 401 * in HP-UX that the mapped address was the return value 402 * of the ioctl. The only thing I remember that counted 403 * on this behavior was the rbox X10 server. 404 */ 405 if (!error) 406 u.u_r.r_val1 = *(int *)data; /* XXX: this sux */ 407 #endif 408 break; 409 410 case IOMAPUNMAP: 411 error = iounmmap(dev, *(caddr_t *)data); 412 break; 413 414 default: 415 error = EINVAL; 416 break; 417 } 418 return(error); 419 } 420 421 int 422 grflock(gp, block) 423 register struct grf_softc *gp; 424 int block; 425 { 426 struct proc *p = curproc; /* XXX */ 427 int error; 428 extern char devioc[]; 429 430 #ifdef DEBUG 431 if (grfdebug & GDB_LOCK) 432 printf("grflock(%d): flags %x lockpid %x\n", 433 p->p_pid, gp->g_flags, 434 gp->g_lockp ? gp->g_lockp->p_pid : -1); 435 #endif 436 if (gp->g_pid) { 437 #ifdef DEBUG 438 if (grfdebug & GDB_LOCK) 439 printf(" lockpslot %d lockslot %d lock[lockslot] %d\n", 440 gp->g_lock->gl_lockslot, gp->g_lockpslot, 441 gp->g_lock->gl_locks[gp->g_lockpslot]); 442 #endif 443 gp->g_lock->gl_lockslot = 0; 444 if (gp->g_lock->gl_locks[gp->g_lockpslot] == 0) { 445 gp->g_lockp = NULL; 446 gp->g_lockpslot = 0; 447 } 448 } 449 if (gp->g_lockp) { 450 if (gp->g_lockp == p) 451 return(EBUSY); 452 if (!block) 453 return(OEAGAIN); 454 do { 455 gp->g_flags |= GF_WANTED; 456 if ((error = tsleep((caddr_t)&gp->g_flags, 457 (PZERO+1) | PCATCH, devioc, 0))) 458 return (error); 459 } while (gp->g_lockp); 460 } 461 gp->g_lockp = p; 462 if (gp->g_pid) { 463 int slot = grffindpid(gp); 464 465 #ifdef DEBUG 466 if (grfdebug & GDB_LOCK) 467 printf(" slot %d\n", slot); 468 #endif 469 gp->g_lockpslot = gp->g_lock->gl_lockslot = slot; 470 gp->g_lock->gl_locks[slot] = 1; 471 } 472 return(0); 473 } 474 475 int 476 grfunlock(gp) 477 register struct grf_softc *gp; 478 { 479 #ifdef DEBUG 480 if (grfdebug & GDB_LOCK) 481 printf("grfunlock(%d): flags %x lockpid %d\n", 482 curproc->p_pid, gp->g_flags, 483 gp->g_lockp ? gp->g_lockp->p_pid : -1); 484 #endif 485 if (gp->g_lockp != curproc) 486 return(EBUSY); 487 if (gp->g_pid) { 488 #ifdef DEBUG 489 if (grfdebug & GDB_LOCK) 490 printf(" lockpslot %d lockslot %d lock[lockslot] %d\n", 491 gp->g_lock->gl_lockslot, gp->g_lockpslot, 492 gp->g_lock->gl_locks[gp->g_lockpslot]); 493 #endif 494 gp->g_lock->gl_locks[gp->g_lockpslot] = 0; 495 gp->g_lockpslot = gp->g_lock->gl_lockslot = 0; 496 } 497 if (gp->g_flags & GF_WANTED) { 498 wakeup((caddr_t)&gp->g_flags); 499 gp->g_flags &= ~GF_WANTED; 500 } 501 gp->g_lockp = NULL; 502 return(0); 503 } 504 505 /* 506 * Convert a BSD style minor devno to HPUX style. 507 * We cannot just create HPUX style nodes as they require 24 bits 508 * of minor device number and we only have 8. 509 * XXX: This may give the wrong result for remote stats of other 510 * machines where device 10 exists. 511 */ 512 int 513 grfdevno(dev) 514 dev_t dev; 515 { 516 int unit = GRFUNIT(dev); 517 struct grf_softc *gp; 518 int newdev; 519 520 if (unit >= grf_cd.cd_ndevs || 521 (gp = grf_cd.cd_devs[unit]) == NULL || 522 (gp->g_flags&GF_ALIVE) == 0) 523 return(bsdtohpuxdev(dev)); 524 /* magic major number */ 525 newdev = 12 << 24; 526 /* now construct minor number */ 527 if (gp->g_display.gd_regaddr != (caddr_t)GRFIADDR) { 528 int sc = patosc(gp->g_display.gd_regaddr); 529 newdev |= (sc << 16) | 0x200; 530 } 531 if (dev & GRFIMDEV) 532 newdev |= 0x02; 533 else if (dev & GRFOVDEV) 534 newdev |= 0x01; 535 #ifdef DEBUG 536 if (grfdebug & GDB_DEVNO) 537 printf("grfdevno: dev %x newdev %x\n", dev, newdev); 538 #endif 539 return(newdev); 540 } 541 542 #endif /* COMPAT_HPUX */ 543 544 int 545 grfmap(dev, addrp, p) 546 dev_t dev; 547 caddr_t *addrp; 548 struct proc *p; 549 { 550 struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)]; 551 int len, error; 552 struct vnode vn; 553 struct specinfo si; 554 int flags; 555 556 #ifdef DEBUG 557 if (grfdebug & GDB_MMAP) 558 printf("grfmap(%d): addr %p\n", p->p_pid, *addrp); 559 #endif 560 len = gp->g_display.gd_regsize + gp->g_display.gd_fbsize; 561 flags = MAP_SHARED; 562 if (*addrp) 563 flags |= MAP_FIXED; 564 else 565 *addrp = (caddr_t)0x1000000; /* XXX */ 566 vn.v_type = VCHR; /* XXX */ 567 vn.v_specinfo = &si; /* XXX */ 568 vn.v_rdev = dev; /* XXX */ 569 error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp, 570 (vsize_t)len, VM_PROT_ALL, VM_PROT_ALL, 571 flags, (caddr_t)&vn, 0, 572 p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 573 if (error == 0) 574 (void) (*gp->g_sw->gd_mode)(gp, GM_MAP, *addrp); 575 return(error); 576 } 577 578 int 579 grfunmap(dev, addr, p) 580 dev_t dev; 581 caddr_t addr; 582 struct proc *p; 583 { 584 struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)]; 585 vsize_t size; 586 int rv; 587 588 #ifdef DEBUG 589 if (grfdebug & GDB_MMAP) 590 printf("grfunmap(%d): dev %x addr %p\n", p->p_pid, dev, addr); 591 #endif 592 if (addr == 0) 593 return(EINVAL); /* XXX: how do we deal with this? */ 594 (void) (*gp->g_sw->gd_mode)(gp, GM_UNMAP, 0); 595 size = round_page(gp->g_display.gd_regsize + gp->g_display.gd_fbsize); 596 rv = uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, 597 (vaddr_t)addr + size); 598 return(rv == KERN_SUCCESS ? 0 : EINVAL); 599 } 600 601 #ifdef COMPAT_HPUX 602 int 603 iommap(dev, addrp) 604 dev_t dev; 605 caddr_t *addrp; 606 { 607 608 #ifdef DEBUG 609 if (grfdebug & (GDB_MMAP|GDB_IOMAP)) 610 printf("iommap(%d): addr %p\n", curproc->p_pid, *addrp); 611 #endif 612 return(EINVAL); 613 } 614 615 int 616 iounmmap(dev, addr) 617 dev_t dev; 618 caddr_t addr; 619 { 620 #ifdef DEBUG 621 int unit = minor(dev); 622 623 if (grfdebug & (GDB_MMAP|GDB_IOMAP)) 624 printf("iounmmap(%d): id %d addr %p\n", 625 curproc->p_pid, unit, addr); 626 #endif 627 return(0); 628 } 629 630 /* 631 * Processes involved in framebuffer mapping via GCSLOT are recorded in 632 * an array of pids. The first element is used to record the last slot used 633 * (for faster lookups). The remaining elements record up to GRFMAXLCK-1 634 * process ids. Returns a slot number between 1 and GRFMAXLCK or 0 if no 635 * slot is available. 636 */ 637 int 638 grffindpid(gp) 639 struct grf_softc *gp; 640 { 641 register short pid, *sp; 642 register int i, limit; 643 int ni; 644 645 if (gp->g_pid == NULL) { 646 gp->g_pid = (short *) 647 malloc(GRFMAXLCK * sizeof(short), M_DEVBUF, M_WAITOK); 648 bzero((caddr_t)gp->g_pid, GRFMAXLCK * sizeof(short)); 649 } 650 pid = curproc->p_pid; 651 ni = limit = gp->g_pid[0]; 652 for (i = 1, sp = &gp->g_pid[1]; i <= limit; i++, sp++) { 653 if (*sp == pid) 654 goto done; 655 if (*sp == 0) 656 ni = i; 657 } 658 i = ni; 659 if (i < limit) { 660 gp->g_pid[i] = pid; 661 goto done; 662 } 663 if (++i == GRFMAXLCK) 664 return(0); 665 gp->g_pid[0] = i; 666 gp->g_pid[i] = pid; 667 done: 668 #ifdef DEBUG 669 if (grfdebug & GDB_LOCK) 670 printf("grffindpid(%d): slot %d of %d\n", 671 pid, i, gp->g_pid[0]); 672 #endif 673 return(i); 674 } 675 676 void 677 grfrmpid(gp) 678 struct grf_softc *gp; 679 { 680 register short pid, *sp; 681 register int limit, i; 682 int mi; 683 684 if (gp->g_pid == NULL || (limit = gp->g_pid[0]) == 0) 685 return; 686 pid = curproc->p_pid; 687 limit = gp->g_pid[0]; 688 mi = 0; 689 for (i = 1, sp = &gp->g_pid[1]; i <= limit; i++, sp++) { 690 if (*sp == pid) 691 *sp = 0; 692 else if (*sp) 693 mi = i; 694 } 695 i = mi; 696 if (i < limit) 697 gp->g_pid[0] = i; 698 #ifdef DEBUG 699 if (grfdebug & GDB_LOCK) 700 printf("grfrmpid(%d): slot %d of %d\n", 701 pid, sp-gp->g_pid, gp->g_pid[0]); 702 #endif 703 } 704 705 int 706 grflckmmap(dev, addrp) 707 dev_t dev; 708 caddr_t *addrp; 709 { 710 #ifdef DEBUG 711 struct proc *p = curproc; /* XXX */ 712 713 if (grfdebug & (GDB_MMAP|GDB_LOCK)) 714 printf("grflckmmap(%d): addr %p\n", 715 p->p_pid, *addrp); 716 #endif 717 return(EINVAL); 718 } 719 720 int 721 grflckunmmap(dev, addr) 722 dev_t dev; 723 caddr_t addr; 724 { 725 #ifdef DEBUG 726 int unit = minor(dev); 727 728 if (grfdebug & (GDB_MMAP|GDB_LOCK)) 729 printf("grflckunmmap(%d): id %d addr %p\n", 730 curproc->p_pid, unit, addr); 731 #endif 732 return(EINVAL); 733 } 734 #endif /* COMPAT_HPUX */ 735
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