1 /*- 2 * Copyright (c) 2000-2001 by Coleman Kane <cokane@FreeBSD.org> 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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Gardner Buchanan. 16 * 4. The name of Gardner Buchanan may not be used to endorse or promote 17 * products derived from this software without specific prior written 18 * permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 /* 3dfx driver for FreeBSD 4.x - Finished 11 May 2000, 12:25AM ET 36 * 37 * Copyright (C) 2000-2001, by Coleman Kane <cokane@FreeBSD.org>, 38 * based upon the 3dfx driver written for linux, by Daryll Straus, Jon Taylor, 39 * and Jens Axboe, located at http://linux.3dfx.com. 40 */ 41 42 #include <sys/param.h> 43 44 #include <sys/bus.h> 45 #include <sys/cdefs.h> 46 #include <sys/conf.h> 47 #include <sys/fcntl.h> 48 #include <sys/file.h> 49 #include <sys/filedesc.h> 50 #include <sys/filio.h> 51 #include <sys/ioccom.h> 52 #include <sys/kernel.h> 53 #include <sys/malloc.h> 54 #include <sys/mman.h> 55 #include <sys/signalvar.h> 56 #include <sys/systm.h> 57 #include <sys/uio.h> 58 59 #include <dev/pci/pcivar.h> 60 #include <dev/pci/pcireg.h> 61 62 #include <vm/vm.h> 63 #include <vm/vm_kern.h> 64 #include <vm/pmap.h> 65 #include <vm/vm_extern.h> 66 67 /* rman.h depends on machine/bus.h */ 68 #include <machine/resource.h> 69 #include <machine/bus.h> 70 #include <sys/rman.h> 71 72 /* This must come first */ 73 #include "opt_tdfx.h" 74 #ifdef TDFX_LINUX 75 #include <dev/tdfx/tdfx_linux.h> 76 #endif 77 78 #include <dev/tdfx/tdfx_io.h> 79 #include <dev/tdfx/tdfx_vars.h> 80 #include <dev/tdfx/tdfx_pci.h> 81 82 83 static devclass_t tdfx_devclass; 84 85 86 static int tdfx_count = 0; 87 88 89 /* Set up the boot probe/attach routines */ 90 static device_method_t tdfx_methods[] = { 91 DEVMETHOD(device_probe, tdfx_probe), 92 DEVMETHOD(device_attach, tdfx_attach), 93 DEVMETHOD(device_detach, tdfx_detach), 94 DEVMETHOD(device_shutdown, tdfx_shutdown), 95 { 0, 0 } 96 }; 97 98 MALLOC_DEFINE(M_TDFX,"TDFX Driver","3DFX Graphics[/2D]/3D Accelerator(s)"); 99 100 #ifdef TDFX_LINUX 101 MODULE_DEPEND(tdfx, linux, 1, 1, 1); 102 LINUX_IOCTL_SET(tdfx, LINUX_IOCTL_TDFX_MIN, LINUX_IOCTL_TDFX_MAX); 103 #endif 104 105 /* Char. Dev. file operations structure */ 106 static struct cdevsw tdfx_cdev = { 107 .d_open = tdfx_open, 108 .d_close = tdfx_close, 109 .d_ioctl = tdfx_ioctl, 110 .d_mmap = tdfx_mmap, 111 .d_name = "tdfx", 112 }; 113 114 static int 115 tdfx_probe(device_t dev) 116 { 117 /* 118 * probe routine called on kernel boot to register supported devices. We get 119 * a device structure to work with, and we can test the VENDOR/DEVICE IDs to 120 * see if this PCI device is one that we support. Return 0 if yes, ENXIO if 121 * not. 122 */ 123 switch(pci_get_devid(dev)) { 124 case PCI_DEVICE_ALLIANCE_AT3D: 125 device_set_desc(dev, "ProMotion At3D 3D Accelerator"); 126 return 0; 127 case PCI_DEVICE_3DFX_VOODOO2: 128 device_set_desc(dev, "3DFX Voodoo II 3D Accelerator"); 129 return 0; 130 /*case PCI_DEVICE_3DFX_BANSHEE: 131 device_set_desc(dev, "3DFX Voodoo Banshee 2D/3D Graphics Accelerator"); 132 return 0; 133 case PCI_DEVICE_3DFX_VOODOO3: 134 device_set_desc(dev, "3DFX Voodoo3 2D/3D Graphics Accelerator"); 135 return 0;*/ 136 case PCI_DEVICE_3DFX_VOODOO1: 137 device_set_desc(dev, "3DFX Voodoo Graphics 3D Accelerator"); 138 return 0;; 139 }; 140 141 return ENXIO; 142 } 143 144 static int 145 tdfx_attach(device_t dev) { 146 /* 147 * The attach routine is called after the probe routine successfully says it 148 * supports a given card. We now proceed to initialize this card for use with 149 * the system. I want to map the device memory for userland allocation and 150 * fill an information structure with information on this card. I'd also like 151 * to set Write Combining with the MTRR code so that we can hopefully speed 152 * up memory writes. The last thing is to register the character device 153 * interface to the card, so we can open it from /dev/3dfxN, where N is a 154 * small, whole number. 155 */ 156 struct tdfx_softc *tdfx_info; 157 u_long val; 158 /* rid value tells bus_alloc_resource where to find the addresses of ports or 159 * of memory ranges in the PCI config space*/ 160 int rid = PCIR_BAR(0); 161 162 /* Increment the card counter (for the ioctl code) */ 163 tdfx_count++; 164 165 /* Enable MemMap on Voodoo */ 166 val = pci_read_config(dev, PCIR_COMMAND, 2); 167 val |= (PCIM_CMD_MEMEN); 168 pci_write_config(dev, PCIR_COMMAND, val, 2); 169 val = pci_read_config(dev, PCIR_COMMAND, 2); 170 171 /* Fill the soft config struct with info about this device*/ 172 tdfx_info = device_get_softc(dev); 173 tdfx_info->dev = dev; 174 tdfx_info->vendor = pci_get_vendor(dev); 175 tdfx_info->type = pci_get_devid(dev) >> 16; 176 tdfx_info->bus = pci_get_bus(dev); 177 tdfx_info->dv = pci_get_slot(dev); 178 tdfx_info->curFile = NULL; 179 180 /* 181 * Get the Memory Location from the PCI Config, mask out lower word, since 182 * the config space register is only one word long (this is nicer than a 183 * bitshift). 184 */ 185 tdfx_info->addr0 = (pci_read_config(dev, 0x10, 4) & 0xffff0000); 186 #ifdef DEBUG 187 device_printf(dev, "Base0 @ 0x%x\n", tdfx_info->addr0); 188 #endif 189 /* Notify the VM that we will be mapping some memory later */ 190 tdfx_info->memrange = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1, 191 RF_ACTIVE | RF_SHAREABLE); 192 if(tdfx_info->memrange == NULL) { 193 #ifdef DEBUG 194 device_printf(dev, "Error mapping mem, won't be able to use mmap()\n"); 195 #endif 196 tdfx_info->memrid = 0; 197 } 198 else { 199 tdfx_info->memrid = rid; 200 #ifdef DEBUG 201 device_printf(dev, "Mapped to: 0x%x\n", 202 (unsigned int)rman_get_start(tdfx_info->memrange)); 203 #endif 204 } 205 206 /* Setup for Voodoo3 and Banshee, PIO and an extram Memrange */ 207 if(pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3 || 208 pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE) { 209 rid = 0x14; /* 2nd mem map */ 210 tdfx_info->addr1 = (pci_read_config(dev, 0x14, 4) & 0xffff0000); 211 #ifdef DEBUG 212 device_printf(dev, "Base1 @ 0x%x\n", tdfx_info->addr1); 213 #endif 214 tdfx_info->memrange2 = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 215 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 216 if(tdfx_info->memrange2 == NULL) { 217 #ifdef DEBUG 218 device_printf(dev, "Mem1 couldn't be allocated, glide may not work."); 219 #endif 220 tdfx_info->memrid2 = 0; 221 } 222 else { 223 tdfx_info->memrid2 = rid; 224 } 225 /* Now to map the PIO stuff */ 226 rid = PCIR_IOBASE0_2; 227 tdfx_info->pio0 = pci_read_config(dev, 0x2c, 2); 228 tdfx_info->pio0max = pci_read_config(dev, 0x30, 2) + tdfx_info->pio0; 229 tdfx_info->piorange = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 230 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 231 if(tdfx_info->piorange == NULL) { 232 #ifdef DEBUG 233 device_printf(dev, "Couldn't map PIO range."); 234 #endif 235 tdfx_info->piorid = 0; 236 } 237 else { 238 tdfx_info->piorid = rid; 239 } 240 } else { 241 tdfx_info->addr1 = 0; 242 tdfx_info->memrange2 = NULL; 243 tdfx_info->piorange = NULL; 244 } 245 246 /* 247 * Set Writecombining, or at least Uncacheable for the memory region, if we 248 * are able to 249 */ 250 251 if(tdfx_setmtrr(dev) != 0) { 252 #ifdef DEBUG 253 device_printf(dev, "Some weird error setting MTRRs"); 254 #endif 255 return -1; 256 } 257 258 /* 259 * make_dev registers the cdev to access the 3dfx card from /dev 260 * use hex here for the dev num, simply to provide better support if > 10 261 * voodoo cards, for the mad. The user must set the link, or use MAKEDEV. 262 * Why would we want that many voodoo cards anyhow? 263 */ 264 tdfx_info->devt = make_dev(&tdfx_cdev, device_get_unit(dev), 265 UID_ROOT, GID_WHEEL, 0600, "3dfx%x", device_get_unit(dev)); 266 267 return 0; 268 } 269 270 static int 271 tdfx_detach(device_t dev) { 272 struct tdfx_softc* tdfx_info; 273 int retval; 274 tdfx_info = device_get_softc(dev); 275 276 /* Delete allocated resource, of course */ 277 bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid, 278 tdfx_info->memrange); 279 280 /* Release extended Voodoo3/Banshee resources */ 281 if(pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE || 282 pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) { 283 if(tdfx_info->memrange2 != NULL) 284 bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid2, 285 tdfx_info->memrange); 286 /* if(tdfx_info->piorange != NULL) 287 bus_release_resource(dev, SYS_RES_IOPORT, tdfx_info->piorid, 288 tdfx_info->piorange);*/ 289 } 290 291 /* Though it is safe to leave the WRCOMB support since the 292 mem driver checks for it, we should remove it in order 293 to free an MTRR for another device */ 294 retval = tdfx_clrmtrr(dev); 295 #ifdef DEBUG 296 if(retval != 0) 297 printf("tdfx: For some reason, I couldn't clear the mtrr\n"); 298 #endif 299 /* Remove device entry when it can no longer be accessed */ 300 destroy_dev(tdfx_info->devt); 301 return(0); 302 } 303 304 static int 305 tdfx_shutdown(device_t dev) { 306 #ifdef DEBUG 307 device_printf(dev, "tdfx: Device Shutdown\n"); 308 #endif 309 return 0; 310 } 311 312 static int 313 tdfx_clrmtrr(device_t dev) { 314 /* This function removes the MTRR set by the attach call, so it can be used 315 * in the future by other drivers. 316 */ 317 int retval, act; 318 struct tdfx_softc *tdfx_info = device_get_softc(dev); 319 320 act = MEMRANGE_SET_REMOVE; 321 retval = mem_range_attr_set(&tdfx_info->mrdesc, &act); 322 return retval; 323 } 324 325 static int 326 tdfx_setmtrr(device_t dev) { 327 /* 328 * This is the MTRR setting function for the 3dfx card. It is called from 329 * tdfx_attach. If we can't set the MTRR properly, it's not the end of the 330 * world. We can still continue, just with slightly (very slightly) degraded 331 * performance. 332 */ 333 int retval = 0, act; 334 struct tdfx_softc *tdfx_info = device_get_softc(dev); 335 336 /* The older Voodoo cards have a shorter memrange than the newer ones */ 337 if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1) || (pci_get_devid(dev) == 338 PCI_DEVICE_3DFX_VOODOO2)) { 339 tdfx_info->mrdesc.mr_len = 0x400000; 340 341 /* The memory descriptor is described as the top 15 bits of the real 342 address */ 343 tdfx_info->mrdesc.mr_base = tdfx_info->addr0 & 0xfffe0000; 344 } 345 else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) || 346 (pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE)) { 347 tdfx_info->mrdesc.mr_len = 0x1000000; 348 /* The Voodoo3 and Banshee LFB is the second memory address */ 349 /* The memory descriptor is described as the top 15 bits of the real 350 address */ 351 tdfx_info->mrdesc.mr_base = tdfx_info->addr1 & 0xfffe0000; 352 } 353 else 354 return 0; 355 /* 356 * The Alliance Pro Motion AT3D was not mentioned in the linux 357 * driver as far as MTRR support goes, so I just won't put the 358 * code in here for it. This is where it should go, though. 359 */ 360 361 /* Firstly, try to set write combining */ 362 tdfx_info->mrdesc.mr_flags = MDF_WRITECOMBINE; 363 bcopy("tdfx", &tdfx_info->mrdesc.mr_owner, 4); 364 act = MEMRANGE_SET_UPDATE; 365 retval = mem_range_attr_set(&tdfx_info->mrdesc, &act); 366 367 if(retval == 0) { 368 #ifdef DEBUG 369 device_printf(dev, "MTRR Set Correctly for tdfx\n"); 370 #endif 371 } else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO2) || 372 (pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1)) { 373 /* if, for some reason we can't set the WRCOMB range with the V1/V2, we 374 * can still possibly use the UNCACHEABLE region for it instead, and help 375 * out in a small way */ 376 tdfx_info->mrdesc.mr_flags = MDF_UNCACHEABLE; 377 /* This length of 1000h was taken from the linux device driver... */ 378 tdfx_info->mrdesc.mr_len = 0x1000; 379 380 /* 381 * If, for some reason, we can't set the MTRR (N/A?) we may still continue 382 */ 383 #ifdef DEBUG 384 if(retval == 0) { 385 device_printf(dev, "MTRR Set Type Uncacheable %x\n", 386 (u_int32_t)tdfx_info->mrdesc.mr_base); 387 } else { 388 device_printf(dev, "Couldn't Set MTRR\n"); 389 } 390 #endif 391 } 392 #ifdef DEBUG 393 else { 394 device_printf(dev, "Couldn't Set MTRR\n"); 395 return 0; 396 } 397 #endif 398 return 0; 399 } 400 401 static int 402 tdfx_open(dev_t dev, int flags, int fmt, struct thread *td) 403 { 404 /* 405 * The open cdev method handles open(2) calls to /dev/3dfx[n] 406 * We can pretty much allow any opening of the device. 407 */ 408 struct tdfx_softc *tdfx_info = devclass_get_softc(tdfx_devclass, 409 UNIT(minor(dev))); 410 if(tdfx_info->busy != 0) return EBUSY; 411 #ifdef DEBUG 412 printf("3dfx: Opened by #%d\n", td->td_proc->p_pid); 413 #endif 414 /* Set the driver as busy */ 415 tdfx_info->busy++; 416 return 0; 417 } 418 419 static int 420 tdfx_close(dev_t dev, int fflag, int devtype, struct thread *td) 421 { 422 /* 423 * The close cdev method handles close(2) calls to /dev/3dfx[n] 424 * We'll always want to close the device when it's called. 425 */ 426 struct tdfx_softc *tdfx_info = devclass_get_softc(tdfx_devclass, 427 UNIT(minor(dev))); 428 if(tdfx_info->busy == 0) return EBADF; 429 tdfx_info->busy = 0; 430 #ifdef DEBUG 431 printf("Closed by #%d\n", td->td_proc->p_pid); 432 #endif 433 return 0; 434 } 435 436 static int 437 tdfx_mmap(dev_t dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) 438 { 439 /* 440 * mmap(2) is called by a user process to request that an area of memory 441 * associated with this device be mapped for the process to work with. Nprot 442 * holds the protections requested, PROT_READ, PROT_WRITE, or both. 443 */ 444 445 /**** OLD GET CONFIG ****/ 446 /* struct tdfx_softc* tdfx_info; */ 447 448 /* Get the configuration for our card XXX*/ 449 /*tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 450 UNIT(minor(dev)));*/ 451 /************************/ 452 453 struct tdfx_softc* tdfx_info[2]; 454 455 tdfx_info[0] = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 0); 456 457 /* If, for some reason, its not configured, we bail out */ 458 if(tdfx_info[0] == NULL) { 459 #ifdef DEBUG 460 printf("tdfx: tdfx_info (softc) is NULL\n"); 461 #endif 462 return -1; 463 } 464 465 /* We must stay within the bound of our address space */ 466 if((offset & 0xff000000) == tdfx_info[0]->addr0) { 467 offset &= 0xffffff; 468 *paddr = rman_get_start(tdfx_info[0]->memrange) + offset; 469 return 0; 470 } 471 472 if(tdfx_count > 1) { 473 tdfx_info[1] = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 1); 474 if((offset & 0xff000000) == tdfx_info[1]->addr0) { 475 offset &= 0xffffff; 476 *paddr = rman_get_start(tdfx_info[1]->memrange) + 477 offset; 478 return 0; 479 } 480 } 481 482 /* See if the Banshee/V3 LFB is being requested */ 483 /*if(tdfx_info->memrange2 != NULL && (offset & 0xff000000) == 484 tdfx_info->addr1) { 485 offset &= 0xffffff; 486 return atop(rman_get_start(tdfx_info[1]->memrange2) + offset); 487 }*/ /* VoodooNG code */ 488 489 /* The ret call */ 490 /* atop -> address to page 491 * rman_get_start, get the (struct resource*)->r_start member, 492 * the mapping base address. 493 */ 494 return -1; 495 } 496 497 static int 498 tdfx_query_boards(void) { 499 /* 500 * This returns the number of installed tdfx cards, we have been keeping 501 * count, look at tdfx_attach 502 */ 503 return tdfx_count; 504 } 505 506 static int 507 tdfx_query_fetch(u_int cmd, struct tdfx_pio_data *piod) 508 { 509 /* XXX Comment this later, after careful inspection and spring cleaning :) */ 510 /* Various return values 8bit-32bit */ 511 u_int8_t ret_byte; 512 u_int16_t ret_word; 513 u_int32_t ret_dword; 514 struct tdfx_softc* tdfx_info = NULL; 515 516 /* This one depend on the tdfx_* structs being properly initialized */ 517 518 /*piod->device &= 0xf;*/ 519 if((piod == NULL) ||(tdfx_count <= piod->device) || 520 (piod->device < 0)) { 521 #ifdef DEBUG 522 printf("tdfx: Bad device or internal struct in tdfx_query_fetch\n"); 523 #endif 524 return -EINVAL; 525 } 526 527 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 528 piod->device); 529 530 if(tdfx_info == NULL) return -ENXIO; 531 532 /* We must restrict the size reads from the port, since to high or low of a 533 * size witll result in wrong data being passed, and that's bad */ 534 /* A few of these were pulled during the attach phase */ 535 switch(piod->port) { 536 case PCI_VENDOR_ID_FREEBSD: 537 if(piod->size != 2) return -EINVAL; 538 copyout(&tdfx_info->vendor, piod->value, piod->size); 539 return 0; 540 case PCI_DEVICE_ID_FREEBSD: 541 if(piod->size != 2) return -EINVAL; 542 copyout(&tdfx_info->type, piod->value, piod->size); 543 return 0; 544 case PCI_BASE_ADDRESS_0_FREEBSD: 545 if(piod->size != 4) return -EINVAL; 546 copyout(&tdfx_info->addr0, piod->value, piod->size); 547 return 0; 548 case PCI_BASE_ADDRESS_1_FREEBSD: 549 if(piod->size != 4) return -EINVAL; 550 copyout(&tdfx_info->addr1, piod->value, piod->size); 551 return 0; 552 case PCI_PRIBUS_FREEBSD: 553 if(piod->size != 1) return -EINVAL; 554 break; 555 case PCI_IOBASE_0_FREEBSD: 556 if(piod->size != 2) return -EINVAL; 557 break; 558 case PCI_IOLIMIT_0_FREEBSD: 559 if(piod->size != 2) return -EINVAL; 560 break; 561 case SST1_PCI_SPECIAL1_FREEBSD: 562 if(piod->size != 4) return -EINVAL; 563 break; 564 case PCI_REVISION_ID_FREEBSD: 565 if(piod->size != 1) return -EINVAL; 566 break; 567 case SST1_PCI_SPECIAL4_FREEBSD: 568 if(piod->size != 4) return -EINVAL; 569 break; 570 default: 571 return -EINVAL; 572 } 573 574 575 /* Read the value and return */ 576 switch(piod->size) { 577 case 1: 578 ret_byte = pci_read_config(tdfx_info[piod->device].dev, 579 piod->port, 1); 580 copyout(&ret_byte, piod->value, 1); 581 break; 582 case 2: 583 ret_word = pci_read_config(tdfx_info[piod->device].dev, 584 piod->port, 2); 585 copyout(&ret_word, piod->value, 2); 586 break; 587 case 4: 588 ret_dword = pci_read_config(tdfx_info[piod->device].dev, 589 piod->port, 4); 590 copyout(&ret_dword, piod->value, 4); 591 break; 592 default: 593 return -EINVAL; 594 } 595 return 0; 596 } 597 598 static int 599 tdfx_query_update(u_int cmd, struct tdfx_pio_data *piod) 600 { 601 /* XXX Comment this later, after careful inspection and spring cleaning :) */ 602 /* Return vals */ 603 u_int8_t ret_byte; 604 u_int16_t ret_word; 605 u_int32_t ret_dword; 606 607 /* Port vals, mask */ 608 u_int32_t retval, preval, mask; 609 struct tdfx_softc* tdfx_info = NULL; 610 611 612 if((piod == NULL) || (piod->device >= (tdfx_count & 613 0xf))) { 614 #ifdef DEBUG 615 printf("tdfx: Bad struct or device in tdfx_query_update\n"); 616 #endif 617 return -EINVAL; 618 } 619 620 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 621 piod->device); 622 if(tdfx_info == NULL) return -ENXIO; 623 /* Code below this line in the fuction was taken from the 624 * Linux driver and converted for freebsd. */ 625 626 /* Check the size for all the ports, to make sure stuff doesn't get messed up 627 * by poorly written clients */ 628 629 switch(piod->port) { 630 case PCI_COMMAND_FREEBSD: 631 if(piod->size != 2) return -EINVAL; 632 break; 633 case SST1_PCI_SPECIAL1_FREEBSD: 634 if(piod->size != 4) return -EINVAL; 635 break; 636 case SST1_PCI_SPECIAL2_FREEBSD: 637 if(piod->size != 4) return -EINVAL; 638 break; 639 case SST1_PCI_SPECIAL3_FREEBSD: 640 if(piod->size != 4) return -EINVAL; 641 break; 642 case SST1_PCI_SPECIAL4_FREEBSD: 643 if(piod->size != 4) return -EINVAL; 644 break; 645 default: 646 return -EINVAL; 647 } 648 /* Read the current value */ 649 retval = pci_read_config(tdfx_info->dev, piod->port & ~3, 4); 650 651 /* These set up a mask to use, since apparently they wanted to write 4 bytes 652 * at once to the ports */ 653 switch (piod->size) { 654 case 1: 655 copyin(piod->value, &ret_byte, 1); 656 preval = ret_byte << (8 * (piod->port & 0x3)); 657 mask = 0xff << (8 * (piod->port & 0x3)); 658 break; 659 case 2: 660 copyin(piod->value, &ret_word, 2); 661 preval = ret_word << (8 * (piod->port & 0x3)); 662 mask = 0xffff << (8 * (piod->port & 0x3)); 663 break; 664 case 4: 665 copyin(piod->value, &ret_dword, 4); 666 preval = ret_dword; 667 mask = ~0; 668 break; 669 default: 670 return -EINVAL; 671 } 672 /* Finally, combine the values and write it to the port */ 673 retval = (retval & ~mask) | preval; 674 pci_write_config(tdfx_info->dev, piod->port & ~3, retval, 4); 675 676 return 0; 677 } 678 679 /* For both of these, I added a variable named workport of type u_int so 680 * that I could eliminate the warning about my data type size. The 681 * applications expect the port to be of type short, so I needed to change 682 * this within the function */ 683 static int 684 tdfx_do_pio_rd(struct tdfx_pio_data *piod) 685 { 686 /* Return val */ 687 u_int8_t ret_byte; 688 u_int workport; 689 struct tdfx_softc *tdfx_info = 690 (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, piod->device); 691 692 /* Restricts the access of ports other than those we use */ 693 if(((piod->port != VGA_INPUT_STATUS_1C) || (piod->port != SC_INDEX) || 694 (piod->port != SC_DATA) || (piod->port != VGA_MISC_OUTPUT_READ)) && 695 (piod->port < tdfx_info->pio0) && (piod->port > tdfx_info->pio0max)) 696 return -EPERM; 697 698 /* All VGA STATUS REGS are byte registers, size should never be > 1 */ 699 if(piod->size != 1) { 700 return -EINVAL; 701 } 702 703 /* Write the data to the intended port */ 704 workport = piod->port; 705 ret_byte = inb(workport); 706 copyout(&ret_byte, piod->value, sizeof(u_int8_t)); 707 return 0; 708 } 709 710 static int 711 tdfx_do_pio_wt(struct tdfx_pio_data *piod) 712 { 713 /* return val */ 714 u_int8_t ret_byte; 715 u_int workport; 716 struct tdfx_softc *tdfx_info = (struct 717 tdfx_softc*)devclass_get_softc(tdfx_devclass, piod->device); 718 /* Replace old switch w/ massive if(...) */ 719 /* Restricts the access of ports other than those we use */ 720 if(((piod->port != SC_INDEX) && (piod->port != SC_DATA) && 721 (piod->port != VGA_MISC_OUTPUT_READ)) /* Can't write VGA_ST_1C */ && 722 (piod->port < tdfx_info->pio0) && (piod->port > tdfx_info->pio0max)) 723 return -EPERM; 724 725 /* All VGA STATUS REGS are byte registers, size should never be > 1 */ 726 if(piod->size != 1) { 727 return -EINVAL; 728 } 729 730 /* Write the data to the intended port */ 731 copyin(piod->value, &ret_byte, sizeof(u_int8_t)); 732 workport = piod->port; 733 outb(workport, ret_byte); 734 return 0; 735 } 736 737 static int 738 tdfx_do_query(u_int cmd, struct tdfx_pio_data *piod) 739 { 740 /* There are three sub-commands to the query 0x33 */ 741 switch(_IOC_NR(cmd)) { 742 case 2: 743 return tdfx_query_boards(); 744 break; 745 case 3: 746 return tdfx_query_fetch(cmd, piod); 747 break; 748 case 4: 749 return tdfx_query_update(cmd, piod); 750 break; 751 default: 752 /* In case we are thrown a bogus sub-command! */ 753 #ifdef DEBUG 754 printf("Bad Sub-cmd: 0x%x\n", _IOC_NR(cmd)); 755 #endif 756 return -EINVAL; 757 } 758 } 759 760 static int 761 tdfx_do_pio(u_int cmd, struct tdfx_pio_data *piod) 762 { 763 /* Two types of PIO, INPUT and OUTPUT, as the name suggests */ 764 switch(_IOC_DIR(cmd)) { 765 case IOCV_OUT: 766 return tdfx_do_pio_rd(piod); 767 break; 768 case IOCV_IN: 769 return tdfx_do_pio_wt(piod); 770 break; 771 default: 772 return -EINVAL; 773 } 774 } 775 776 /* Calls to ioctl(2) eventually end up here. Unhandled ioctls return an ENXIO, 777 * normally, you would read in the data pointed to by data, then write your 778 * output to it. The ioctl *should* normally return zero if everything is 779 * alright, but 3dfx didn't make it that way... 780 * 781 * For all of the ioctl code, in the event of a real error, 782 * we return -Exxxx rather than simply Exxxx. The reason for this 783 * is that the ioctls actually RET information back to the program 784 * sometimes, rather than filling it in the passed structure. We 785 * want to distinguish errors from useful data, and maintain compatibility. 786 * 787 * There is this portion of the proc struct called p_retval[], we can store a 788 * return value in td->td_retval[0] and place the return value if it is positive 789 * in there, then we can return 0 (good). If the return value is negative, we 790 * can return -retval and the error should be properly handled. 791 */ 792 static int 793 tdfx_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 794 { 795 int retval = 0; 796 struct tdfx_pio_data *piod = (struct tdfx_pio_data*)data; 797 #ifdef DEBUG 798 printf("IOCTL'd by #%d, cmd: 0x%x, data: %p\n", td->td_proc->p_pid, (u_int32_t)cmd, 799 piod); 800 #endif 801 switch(_IOC_TYPE(cmd)) { 802 /* Return the real error if negative, or simply stick the valid return 803 * in td->td_retval */ 804 case 0x33: 805 /* The '3'(0x33) type IOCTL is for querying the installed cards */ 806 if((retval = tdfx_do_query(cmd, piod)) > 0) td->td_retval[0] = retval; 807 else return -retval; 808 break; 809 case 0: 810 /* The 0 type IOCTL is for programmed I/O methods */ 811 if((tdfx_do_pio(cmd, piod)) > 0) td->td_retval[0] = retval; 812 else return -retval; 813 break; 814 default: 815 /* Technically, we won't reach this from linux emu, but when glide 816 * finally gets ported, watch out! */ 817 #ifdef DEBUG 818 printf("Bad IOCTL from #%d\n", td->td_proc->p_pid); 819 #endif 820 return ENXIO; 821 } 822 823 return 0; 824 } 825 826 #ifdef TDFX_LINUX 827 /* 828 * Linux emulation IOCTL for /dev/tdfx 829 */ 830 static int 831 linux_ioctl_tdfx(struct thread *td, struct linux_ioctl_args* args) 832 { 833 int error = 0; 834 u_long cmd = args->cmd & 0xffff; 835 836 /* The structure passed to ioctl has two shorts, one int 837 and one void*. */ 838 char d_pio[2*sizeof(short) + sizeof(int) + sizeof(void*)]; 839 840 struct file *fp; 841 842 if ((error = fget(td, args->fd, &fp)) != 0) 843 return (error); 844 /* We simply copy the data and send it right to ioctl */ 845 copyin((caddr_t)args->arg, &d_pio, sizeof(d_pio)); 846 error = fo_ioctl(fp, cmd, (caddr_t)&d_pio, td->td_ucred, td); 847 fdrop(fp, td); 848 return error; 849 } 850 #endif /* TDFX_LINUX */ 851 852 853 /* This is the device driver struct. This is sent to the driver subsystem to 854 * register the method structure and the info strcut space for this particular 855 * instance of the driver. 856 */ 857 static driver_t tdfx_driver = { 858 "tdfx", 859 tdfx_methods, 860 sizeof(struct tdfx_softc), 861 }; 862 863 /* Tell Mr. Kernel about us! */ 864 DRIVER_MODULE(tdfx, pci, tdfx_driver, tdfx_devclass, 0, 0); 865