tdfx_pci.c revision 65146
1/* 2 * Copyright (c) 2000 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 * $FreeBSD: head/sys/dev/tdfx/tdfx_pci.c 65146 2000-08-28 04:28:53Z cokane $ 32 */ 33 34/* 3dfx driver for FreeBSD 4.x - Finished 11 May 2000, 12:25AM ET 35 * 36 * Copyright (C) 2000, by Coleman Kane <cokane@FreeBSD.org>, 37 * based upon the 3dfx driver written for linux, by Daryll Straus, Jon Taylor, 38 * and Jens Axboe, located at http://linux.3dfx.com. 39 */ 40 41/* 42 * put this here, so as to bail out immediately if we have no PCI BUS installed 43 */ 44#include "pci.h" 45#if NPCI > 0 46 47#include <sys/param.h> 48 49#include <sys/bus_private.h> 50#include <sys/bus.h> 51#include <sys/cdefs.h> 52#include <sys/conf.h> 53#include <sys/fcntl.h> 54#include <sys/file.h> 55#include <sys/filedesc.h> 56#include <sys/filio.h> 57#include <sys/ioccom.h> 58#include <sys/kernel.h> 59#include <sys/malloc.h> 60#include <sys/mman.h> 61#include <sys/signalvar.h> 62#include <sys/systm.h> 63#include <sys/uio.h> 64 65#include <pci/pcivar.h> 66#include <pci/pcireg.h> 67 68#include <vm/vm.h> 69#include <vm/vm_kern.h> 70#include <vm/pmap.h> 71#include <vm/vm_extern.h> 72 73/* rman.h depends on machine/bus.h */ 74#include <machine/resource.h> 75#include <machine/bus.h> 76#include <sys/rman.h> 77 78/* This must come first */ 79#include "opt_tdfx.h" 80#ifdef TDFX_LINUX 81#include <dev/tdfx/tdfx_linux.h> 82#endif 83 84#include <dev/tdfx/tdfx_io.h> 85#include <dev/tdfx/tdfx_vars.h> 86#include <dev/tdfx/tdfx_pci.h> 87 88 89static devclass_t tdfx_devclass; 90 91 92static int tdfx_count = 0; 93 94 95/* Set up the boot probe/attach routines */ 96static device_method_t tdfx_methods[] = { 97 DEVMETHOD(device_probe, tdfx_probe), 98 DEVMETHOD(device_attach, tdfx_attach), 99 DEVMETHOD(device_detach, tdfx_detach), 100 DEVMETHOD(device_shutdown, tdfx_shutdown), 101 { 0, 0 } 102}; 103 104MALLOC_DEFINE(M_TDFX,"TDFX Driver","3DFX Graphics[/2D]/3D Accelerator(s)"); 105 106#ifdef TDFX_LINUX 107MODULE_DEPEND(tdfx, linux, 1, 1, 1); 108LINUX_IOCTL_SET(tdfx, LINUX_IOCTL_TDFX_MIN, LINUX_IOCTL_TDFX_MAX); 109#endif 110 111/* Char. Dev. file operations structure */ 112static struct cdevsw tdfx_cdev = { 113 tdfx_open, /* open */ 114 tdfx_close, /* close */ 115 noread, /* read */ 116 nowrite, /* write */ 117 tdfx_ioctl, /* ioctl */ 118 nopoll, /* poll */ 119 tdfx_mmap, /* mmap */ 120 nostrategy, /* strategy */ 121 "tdfx", /* dev name */ 122 CDEV_MAJOR, /* char major */ 123 nodump, /* dump */ 124 nopsize, /* size */ 125 0, /* flags (no set flags) */ 126 -1 /* bmaj (no block dev) */ 127}; 128 129static int 130tdfx_probe(device_t dev) 131{ 132 /* 133 * probe routine called on kernel boot to register supported devices. We get 134 * a device structure to work with, and we can test the VENDOR/DEVICE IDs to 135 * see if this PCI device is one that we support. Return 0 if yes, ENXIO if 136 * not. 137 */ 138 switch(pci_get_devid(dev)) { 139 case PCI_DEVICE_ALLIANCE_AT3D: 140 device_set_desc(dev, "ProMotion At3D 3D Accelerator"); 141 return 0; 142 case PCI_DEVICE_3DFX_VOODOO2: 143 device_set_desc(dev, "3DFX Voodoo II 3D Accelerator"); 144 return 0; 145 /*case PCI_DEVICE_3DFX_BANSHEE: 146 device_set_desc(dev, "3DFX Voodoo Banshee 2D/3D Graphics Accelerator"); 147 return 0; 148 case PCI_DEVICE_3DFX_VOODOO3: 149 device_set_desc(dev, "3DFX Voodoo3 2D/3D Graphics Accelerator"); 150 return 0;*/ 151 case PCI_DEVICE_3DFX_VOODOO1: 152 device_set_desc(dev, "3DFX Voodoo Graphics 3D Accelerator"); 153 return 0;; 154 }; 155 156 return ENXIO; 157} 158 159static int 160tdfx_attach(device_t dev) { 161 /* 162 * The attach routine is called after the probe routine successfully says it 163 * supports a given card. We now proceed to initialize this card for use with 164 * the system. I want to map the device memory for userland allocation and 165 * fill an information structure with information on this card. I'd also like 166 * to set Write Combining with the MTRR code so that we can hopefully speed 167 * up memory writes. The last thing is to register the character device 168 * interface to the card, so we can open it from /dev/3dfxN, where N is a 169 * small, whole number. 170 */ 171 struct tdfx_softc *tdfx_info; 172 u_long val; 173 /* rid value tells bus_alloc_resource where to find the addresses of ports or 174 * of memory ranges in the PCI config space*/ 175 int rid = PCIR_MAPS; 176 177 /* Increment the card counter (for the ioctl code) */ 178 tdfx_count++; 179 180 /* Enable MemMap on Voodoo */ 181 val = pci_read_config(dev, PCIR_COMMAND, 2); 182 val |= (PCIM_CMD_MEMEN); 183 pci_write_config(dev, PCIR_COMMAND, val, 2); 184 val = pci_read_config(dev, PCIR_COMMAND, 2); 185 186 /* Fill the soft config struct with info about this device*/ 187 tdfx_info = device_get_softc(dev); 188 tdfx_info->dev = dev; 189 tdfx_info->vendor = pci_get_vendor(dev); 190 tdfx_info->type = pci_get_devid(dev) >> 16; 191 tdfx_info->bus = pci_get_bus(dev); 192 tdfx_info->dv = pci_get_slot(dev); 193 tdfx_info->curFile = NULL; 194 195 /* 196 * Get the Memory Location from the PCI Config, mask out lower word, since 197 * the config space register is only one word long (this is nicer than a 198 * bitshift). 199 */ 200 tdfx_info->addr0 = (pci_read_config(dev, 0x10, 4) & 0xffff0000); 201#ifdef DEBUG 202 device_printf(dev, "Base0 @ 0x%x\n", tdfx_info->addr0); 203#endif 204 /* Notify the VM that we will be mapping some memory later */ 205 tdfx_info->memrange = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1, 206 RF_ACTIVE | RF_SHAREABLE); 207 if(tdfx_info->memrange == NULL) { 208#ifdef DEBUG 209 device_printf(dev, "Error mapping mem, won't be able to use mmap()\n"); 210#endif 211 tdfx_info->memrid = 0; 212 } 213 else { 214 tdfx_info->memrid = rid; 215#ifdef DEBUG 216 device_printf(dev, "Mapped to: 0x%x\n", 217 (unsigned int)rman_get_start(tdfx_info->memrange)); 218#endif 219 } 220 221 /* Setup for Voodoo3 and Banshee, PIO and an extram Memrange */ 222 if(pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3 || 223 pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE) { 224 rid = 0x14; /* 2nd mem map */ 225 tdfx_info->addr1 = (pci_read_config(dev, 0x14, 4) & 0xffff0000); 226#ifdef DEBUG 227 device_printf(dev, "Base1 @ 0x%x\n", tdfx_info->addr1); 228#endif 229 tdfx_info->memrange2 = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 230 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 231 if(tdfx_info->memrange2 == NULL) { 232#ifdef DEBUG 233 device_printf(dev, "Mem1 couldn't be allocated, glide may not work."); 234#endif 235 tdfx_info->memrid2 = 0; 236 } 237 else { 238 tdfx_info->memrid2 = rid; 239 } 240 /* Now to map the PIO stuff */ 241 rid = PCIR_IOBASE0_2; 242 tdfx_info->pio0 = pci_read_config(dev, 0x2c, 2); 243 tdfx_info->pio0max = pci_read_config(dev, 0x30, 2) + tdfx_info->pio0; 244 tdfx_info->piorange = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 245 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 246 if(tdfx_info->piorange == NULL) { 247#ifdef DEBUG 248 device_printf(dev, "Couldn't map PIO range."); 249#endif 250 tdfx_info->piorid = 0; 251 } 252 else { 253 tdfx_info->piorid = rid; 254 } 255 } else { 256 tdfx_info->addr1 = 0; 257 tdfx_info->memrange2 = NULL; 258 tdfx_info->piorange = NULL; 259 } 260 261 /* 262 * Set Writecombining, or at least Uncacheable for the memory region, if we 263 * are able to 264 */ 265 266 if(tdfx_setmtrr(dev) != 0) { 267#ifdef DEBUG 268 device_printf(dev, "Some weird error setting MTRRs"); 269#endif 270 return -1; 271 } 272 273 /* 274 * make_dev registers the cdev to access the 3dfx card from /dev 275 * use hex here for the dev num, simply to provide better support if > 10 276 * voodoo cards, for the mad. The user must set the link, or use MAKEDEV. 277 * Why would we want that many voodoo cards anyhow? 278 */ 279 tdfx_info->devt = make_dev(&tdfx_cdev, dev->unit, 0, 0, 02660, 280 "3dfx%x", dev->unit); 281 282 return 0; 283} 284 285static int 286tdfx_detach(device_t dev) { 287 struct tdfx_softc* tdfx_info; 288 int retval; 289 tdfx_info = device_get_softc(dev); 290 291 /* Delete allocated resource, of course */ 292 bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid, 293 tdfx_info->memrange); 294 295 /* Release extended Voodoo3/Banshee resources */ 296 if(pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE || 297 pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) { 298 if(tdfx_info->memrange2 != NULL) 299 bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid2, 300 tdfx_info->memrange); 301 /* if(tdfx_info->piorange != NULL) 302 bus_release_resource(dev, SYS_RES_IOPORT, tdfx_info->piorid, 303 tdfx_info->piorange);*/ 304 } 305 306 /* Though it is safe to leave the WRCOMB support since the 307 mem driver checks for it, we should remove it in order 308 to free an MTRR for another device */ 309 retval = tdfx_clrmtrr(dev); 310#ifdef DEBUG 311 if(retval != 0) 312 printf("tdfx: For some reason, I couldn't clear the mtrr\n"); 313#endif 314 /* Remove device entry when it can no longer be accessed */ 315 destroy_dev(tdfx_info->devt); 316 return(0); 317} 318 319static int 320tdfx_shutdown(device_t dev) { 321#ifdef DEBUG 322 device_printf(dev, "tdfx: Device Shutdown\n"); 323#endif 324 return 0; 325} 326 327static int 328tdfx_clrmtrr(device_t dev) { 329 /* This function removes the MTRR set by the attach call, so it can be used 330 * in the future by other drivers. 331 */ 332 int retval, act; 333 struct tdfx_softc *tdfx_info = device_get_softc(dev); 334 335 act = MEMRANGE_SET_REMOVE; 336 retval = mem_range_attr_set(&tdfx_info->mrdesc, &act); 337 return retval; 338} 339 340static int 341tdfx_setmtrr(device_t dev) { 342 /* 343 * This is the MTRR setting function for the 3dfx card. It is called from 344 * tdfx_attach. If we can't set the MTRR properly, it's not the end of the 345 * world. We can still continue, just with slightly (very slightly) degraded 346 * performance. 347 */ 348 int retval = 0, act; 349 struct tdfx_softc *tdfx_info = device_get_softc(dev); 350 351 /* The older Voodoo cards have a shorter memrange than the newer ones */ 352 if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1) || (pci_get_devid(dev) == 353 PCI_DEVICE_3DFX_VOODOO2)) { 354 tdfx_info->mrdesc.mr_len = 0x400000; 355 356 /* The memory descriptor is described as the top 15 bits of the real 357 address */ 358 tdfx_info->mrdesc.mr_base = tdfx_info->addr0 & 0xfffe0000; 359 } 360 else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) || 361 (pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE)) { 362 tdfx_info->mrdesc.mr_len = 0x1000000; 363 /* The Voodoo3 and Banshee LFB is the second memory address */ 364 /* The memory descriptor is described as the top 15 bits of the real 365 address */ 366 tdfx_info->mrdesc.mr_base = tdfx_info->addr1 & 0xfffe0000; 367 } 368 else 369 return 0; 370 /* 371 * The Alliance Pro Motion AT3D was not mentioned in the linux 372 * driver as far as MTRR support goes, so I just won't put the 373 * code in here for it. This is where it should go, though. 374 */ 375 376 /* Firstly, try to set write combining */ 377 tdfx_info->mrdesc.mr_flags = MDF_WRITECOMBINE; 378 bcopy("tdfx", &tdfx_info->mrdesc.mr_owner, 4); 379 act = MEMRANGE_SET_UPDATE; 380 retval = mem_range_attr_set(&tdfx_info->mrdesc, &act); 381 382 if(retval == 0) { 383#ifdef DEBUG 384 device_printf(dev, "MTRR Set Correctly for tdfx\n"); 385#endif 386 } else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO2) || 387 (pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1)) { 388 /* if, for some reason we can't set the WRCOMB range with the V1/V2, we 389 * can still possibly use the UNCACHEABLE region for it instead, and help 390 * out in a small way */ 391 tdfx_info->mrdesc.mr_flags = MDF_UNCACHEABLE; 392 /* This length of 1000h was taken from the linux device driver... */ 393 tdfx_info->mrdesc.mr_len = 0x1000; 394 395 /* 396 * If, for some reason, we can't set the MTRR (N/A?) we may still continue 397 */ 398#ifdef DEBUG 399 if(retval == 0) { 400 device_printf(dev, "MTRR Set Type Uncacheable 401 %x\n", (u_int32_t)tdfx_info->mrdesc.mr_base); 402 } else { 403 device_printf(dev, "Couldn't Set MTRR\n"); 404 } 405#endif 406 } 407#ifdef DEBUG 408 else { 409 device_printf(dev, "Couldn't Set MTRR\n"); 410 return 0; 411 } 412#endif 413 return 0; 414} 415 416static int 417tdfx_open(dev_t dev, int flags, int fmt, struct proc *p) 418{ 419 /* 420 * The open cdev method handles open(2) calls to /dev/3dfx[n] 421 * We can pretty much allow any opening of the device. 422 */ 423 struct tdfx_softc *tdfx_info = devclass_get_softc(tdfx_devclass, 424 UNIT(minor(dev))); 425 if(tdfx_info->busy != 0) return EBUSY; 426#ifdef DEBUG 427 printf("3dfx: Opened by #%d\n", p->p_pid); 428#endif 429 /* Set the driver as busy */ 430 tdfx_info->busy++; 431 return 0; 432} 433 434static int 435tdfx_close(dev_t dev, int fflag, int devtype, struct proc* p) 436{ 437 /* 438 * The close cdev method handles close(2) calls to /dev/3dfx[n] 439 * We'll always want to close the device when it's called. 440 */ 441 struct tdfx_softc *tdfx_info = devclass_get_softc(tdfx_devclass, 442 UNIT(minor(dev))); 443 if(tdfx_info->busy == 0) return EBADF; 444 tdfx_info->busy = 0; 445#ifdef DEBUG 446 printf("Closed by #%d\n", p->p_pid); 447#endif 448 return 0; 449} 450 451static int 452tdfx_mmap(dev_t dev, vm_offset_t offset, int nprot) 453{ 454 /* 455 * mmap(2) is called by a user process to request that an area of memory 456 * associated with this device be mapped for the process to work with. Nprot 457 * holds the protections requested, PROT_READ, PROT_WRITE, or both. 458 */ 459 struct tdfx_softc* tdfx_info; 460 461 /* Get the configuration for our card XXX*/ 462 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 463 UNIT(minor(dev))); 464 465 /* If, for some reason, its not configured, we bail out */ 466 if(tdfx_info == NULL) { 467#ifdef DEBUG 468 printf("tdfx: tdfx_info (softc) is NULL\n"); 469#endif 470 return -1; 471 } 472 473 /* We must stay within the bound of our address space */ 474 if((offset & 0xff000000) == tdfx_info->addr0) 475 offset &= 0xffffff; 476 477 /* See if the Banshee/V3 LFB is being requested */ 478 if(tdfx_info->memrange2 != NULL && (offset & 0xff000000) == 479 tdfx_info->addr1) { 480 offset &= 0xffffff; 481 return atop(rman_get_start(tdfx_info->memrange2) + offset); 482 } 483 484 if((offset >= 0x1000000) || (offset < 0)) { 485#ifdef DEBUG 486 printf("tdfx: offset %x out of range\n", offset); 487#endif 488 return -1; 489 } 490 491 /* atop -> address to page 492 * rman_get_start, get the (struct resource*)->r_start member, 493 * the mapping base address. 494 */ 495 return atop(rman_get_start(tdfx_info->memrange) + offset); 496} 497 498static int 499tdfx_query_boards(void) { 500 /* 501 * This returns the number of installed tdfx cards, we have been keeping 502 * count, look at tdfx_attach 503 */ 504 return tdfx_count; 505} 506 507static int 508tdfx_query_fetch(u_int cmd, struct tdfx_pio_data *piod) 509{ 510 /* XXX Comment this later, after careful inspection and spring cleaning :) */ 511 /* Various return values 8bit-32bit */ 512 u_int8_t ret_byte; 513 u_int16_t ret_word; 514 u_int32_t ret_dword; 515 struct tdfx_softc* tdfx_info = NULL; 516 517 /* This one depend on the tdfx_* structs being properly initialized */ 518 519 /*piod->device &= 0xf;*/ 520 if((piod == NULL) ||(tdfx_count <= piod->device) || 521 (piod->device < 0)) { 522#ifdef DEBUG 523 printf("tdfx: Bad device or internal struct in tdfx_query_fetch\n"); 524#endif 525 return -EINVAL; 526 } 527 528 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 529 piod->device); 530 531 if(tdfx_info == NULL) return -ENXIO; 532 533 /* We must restrict the size reads from the port, since to high or low of a 534 * size witll result in wrong data being passed, and that's bad */ 535 /* A few of these were pulled during the attach phase */ 536 switch(piod->port) { 537 case PCI_VENDOR_ID_FREEBSD: 538 if(piod->size != 2) return -EINVAL; 539 copyout(&tdfx_info->vendor, piod->value, piod->size); 540 return 0; 541 case PCI_DEVICE_ID_FREEBSD: 542 if(piod->size != 2) return -EINVAL; 543 copyout(&tdfx_info->type, piod->value, piod->size); 544 return 0; 545 case PCI_BASE_ADDRESS_0_FREEBSD: 546 if(piod->size != 4) return -EINVAL; 547 copyout(&tdfx_info->addr0, piod->value, piod->size); 548 return 0; 549 case PCI_BASE_ADDRESS_1_FREEBSD: 550 if(piod->size != 4) return -EINVAL; 551 copyout(&tdfx_info->addr1, piod->value, piod->size); 552 return 0; 553 case PCI_PRIBUS_FREEBSD: 554 if(piod->size != 1) return -EINVAL; 555 break; 556 case PCI_IOBASE_0_FREEBSD: 557 if(piod->size != 2) return -EINVAL; 558 break; 559 case PCI_IOLIMIT_0_FREEBSD: 560 if(piod->size != 2) return -EINVAL; 561 break; 562 case SST1_PCI_SPECIAL1_FREEBSD: 563 if(piod->size != 4) return -EINVAL; 564 break; 565 case PCI_REVISION_ID_FREEBSD: 566 if(piod->size != 1) return -EINVAL; 567 break; 568 case SST1_PCI_SPECIAL4_FREEBSD: 569 if(piod->size != 4) return -EINVAL; 570 break; 571 default: 572 return -EINVAL; 573 } 574 575 576 /* Read the value and return */ 577 switch(piod->size) { 578 case 1: 579 ret_byte = pci_read_config(tdfx_info[piod->device].dev, 580 piod->port, 1); 581 copyout(&ret_byte, piod->value, 1); 582 break; 583 case 2: 584 ret_word = pci_read_config(tdfx_info[piod->device].dev, 585 piod->port, 2); 586 copyout(&ret_word, piod->value, 2); 587 break; 588 case 4: 589 ret_dword = pci_read_config(tdfx_info[piod->device].dev, 590 piod->port, 4); 591 copyout(&ret_dword, piod->value, 4); 592 break; 593 default: 594 return -EINVAL; 595 } 596 return 0; 597} 598 599static int 600tdfx_query_update(u_int cmd, struct tdfx_pio_data *piod) 601{ 602 /* XXX Comment this later, after careful inspection and spring cleaning :) */ 603 /* Return vals */ 604 u_int8_t ret_byte; 605 u_int16_t ret_word; 606 u_int32_t ret_dword; 607 608 /* Port vals, mask */ 609 u_int32_t retval, preval, mask; 610 struct tdfx_softc* tdfx_info = NULL; 611 612 613 if((piod == NULL) || (piod->device >= (tdfx_count & 614 0xf))) { 615#ifdef DEBUG 616 printf("tdfx: Bad struct or device in tdfx_query_update\n"); 617#endif 618 return -EINVAL; 619 } 620 621 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 622 piod->device); 623 if(tdfx_info == NULL) return -ENXIO; 624 /* Code below this line in the fuction was taken from the 625 * Linux driver and converted for freebsd. */ 626 627 /* Check the size for all the ports, to make sure stuff doesn't get messed up 628 * by poorly written clients */ 629 630 switch(piod->port) { 631 case PCI_COMMAND_FREEBSD: 632 if(piod->size != 2) return -EINVAL; 633 break; 634 case SST1_PCI_SPECIAL1_FREEBSD: 635 if(piod->size != 4) return -EINVAL; 636 break; 637 case SST1_PCI_SPECIAL2_FREEBSD: 638 if(piod->size != 4) return -EINVAL; 639 break; 640 case SST1_PCI_SPECIAL3_FREEBSD: 641 if(piod->size != 4) return -EINVAL; 642 break; 643 case SST1_PCI_SPECIAL4_FREEBSD: 644 if(piod->size != 4) return -EINVAL; 645 break; 646 default: 647 return -EINVAL; 648 } 649 /* Read the current value */ 650 retval = pci_read_config(tdfx_info->dev, piod->port & ~3, 4); 651 652 /* These set up a mask to use, since apparently they wanted to write 4 bytes 653 * at once to the ports */ 654 switch (piod->size) { 655 case 1: 656 copyin(piod->value, &ret_byte, 1); 657 preval = ret_byte << (8 * (piod->port & 0x3)); 658 mask = 0xff << (8 * (piod->port & 0x3)); 659 break; 660 case 2: 661 copyin(piod->value, &ret_word, 2); 662 preval = ret_word << (8 * (piod->port & 0x3)); 663 mask = 0xffff << (8 * (piod->port & 0x3)); 664 break; 665 case 4: 666 copyin(piod->value, &ret_dword, 4); 667 preval = ret_dword; 668 mask = ~0; 669 break; 670 default: 671 return -EINVAL; 672 } 673 /* Finally, combine the values and write it to the port */ 674 retval = (retval & ~mask) | preval; 675 pci_write_config(tdfx_info->dev, piod->port & ~3, retval, 4); 676 677 return 0; 678} 679 680/* For both of these, I added a variable named workport of type u_int so 681 * that I could eliminate the warning about my data type size. The 682 * applications expect the port to be of type short, so I needed to change 683 * this within the function */ 684static int 685tdfx_do_pio_rd(struct tdfx_pio_data *piod) 686{ 687 /* Return val */ 688 u_int8_t ret_byte; 689 u_int workport; 690 struct tdfx_softc *tdfx_info = 691 (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, piod->device); 692 693 /* Restricts the access of ports other than those we use */ 694 if(((piod->port != VGA_INPUT_STATUS_1C) || (piod->port != SC_INDEX) || 695 (piod->port != SC_DATA) || (piod->port != VGA_MISC_OUTPUT_READ)) && 696 (piod->port < tdfx_info->pio0) && (piod->port > tdfx_info->pio0max)) 697 return -EPERM; 698 699 /* All VGA STATUS REGS are byte registers, size should never be > 1 */ 700 if(piod->size != 1) { 701 return -EINVAL; 702 } 703 704 /* Write the data to the intended port */ 705 workport = piod->port; 706 ret_byte = inb(workport); 707 copyout(&ret_byte, piod->value, sizeof(u_int8_t)); 708 return 0; 709} 710 711static int 712tdfx_do_pio_wt(struct tdfx_pio_data *piod) 713{ 714 /* return val */ 715 u_int8_t ret_byte; 716 u_int workport; 717 struct tdfx_softc *tdfx_info = (struct 718 tdfx_softc*)devclass_get_softc(tdfx_devclass, piod->device); 719 /* Replace old switch w/ massive if(...) */ 720 /* Restricts the access of ports other than those we use */ 721 if(((piod->port != SC_INDEX) && (piod->port != SC_DATA) && 722 (piod->port != VGA_MISC_OUTPUT_READ)) /* Can't write VGA_ST_1C */ && 723 (piod->port < tdfx_info->pio0) && (piod->port > tdfx_info->pio0max)) 724 return -EPERM; 725 726 /* All VGA STATUS REGS are byte registers, size should never be > 1 */ 727 if(piod->size != 1) { 728 return -EINVAL; 729 } 730 731 /* Write the data to the intended port */ 732 copyin(piod->value, &ret_byte, sizeof(u_int8_t)); 733 workport = piod->port; 734 outb(workport, ret_byte); 735 return 0; 736} 737 738static int 739tdfx_do_query(u_int cmd, struct tdfx_pio_data *piod) 740{ 741 /* There are three sub-commands to the query 0x33 */ 742 switch(_IOC_NR(cmd)) { 743 case 2: 744 return tdfx_query_boards(); 745 break; 746 case 3: 747 return tdfx_query_fetch(cmd, piod); 748 break; 749 case 4: 750 return tdfx_query_update(cmd, piod); 751 break; 752 default: 753 /* In case we are thrown a bogus sub-command! */ 754#ifdef DEBUG 755 printf("Bad Sub-cmd: 0x%x\n", _IOC_NR(cmd)); 756#endif 757 return -EINVAL; 758 }; 759} 760 761static int 762tdfx_do_pio(u_int cmd, struct tdfx_pio_data *piod) 763{ 764 /* Two types of PIO, INPUT and OUTPUT, as the name suggests */ 765 switch(_IOC_DIR(cmd)) { 766 case IOCV_OUT: 767 return tdfx_do_pio_rd(piod); 768 break; 769 case IOCV_IN: 770 return tdfx_do_pio_wt(piod); 771 break; 772 default: 773 return -EINVAL; 774 }; 775} 776 777/* Calls to ioctl(2) eventually end up here. Unhandled ioctls return an ENXIO, 778 * normally, you would read in the data pointed to by data, then write your 779 * output to it. The ioctl *should* normally return zero if everything is 780 * alright, but 3dfx didn't make it that way... 781 * 782 * For all of the ioctl code, in the event of a real error, 783 * we return -Exxxx rather than simply Exxxx. The reason for this 784 * is that the ioctls actually RET information back to the program 785 * sometimes, rather than filling it in the passed structure. We 786 * want to distinguish errors from useful data, and maintain compatibility. 787 * 788 * There is this portion of the proc struct called p_retval[], we can store a 789 * return value in p->p_retval[0] and place the return value if it is positive 790 * in there, then we can return 0 (good). If the return value is negative, we 791 * can return -retval and the error should be properly handled. 792 */ 793static int 794tdfx_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc * p) 795{ 796 int retval = 0; 797 struct tdfx_pio_data *piod = (struct tdfx_pio_data*)data; 798#ifdef DEBUG 799 printf("IOCTL'd by #%d, cmd: 0x%x, data: 0x%x\n", p->p_pid, (u_int32_t)cmd, 800 (unsigned int)piod); 801#endif 802 switch(_IOC_TYPE(cmd)) { 803 /* Return the real error if negative, or simply stick the valid return 804 * in p->p_retval */ 805 case 0x33: 806 /* The '3'(0x33) type IOCTL is for querying the installed cards */ 807 if((retval = tdfx_do_query(cmd, piod)) > 0) p->p_retval[0] = retval; 808 else return -retval; 809 break; 810 case 0: 811 /* The 0 type IOCTL is for programmed I/O methods */ 812 if((tdfx_do_pio(cmd, piod)) > 0) p->p_retval[0] = retval; 813 else return -retval; 814 break; 815 default: 816 /* Technically, we won't reach this from linux emu, but when glide 817 * finally gets ported, watch out! */ 818#ifdef DEBUG 819 printf("Bad IOCTL from #%d\n", p->p_pid); 820#endif 821 return ENXIO; 822 } 823 824 return 0; 825} 826 827#ifdef TDFX_LINUX 828/* 829 * Linux emulation IOCTL for /dev/tdfx 830 */ 831static int 832linux_ioctl_tdfx(struct proc* p, struct linux_ioctl_args* args) 833{ 834 int error = 0; 835 u_long cmd = args->cmd & 0xffff; 836 837 /* The structure passed to ioctl has two shorts, one int 838 and one void*. */ 839 char d_pio[2*sizeof(short) + sizeof(int) + sizeof(void*)]; 840 841 struct file *fp = p->p_fd->fd_ofiles[args->fd]; 842 843 /* We simply copy the data and send it right to ioctl */ 844 copyin((caddr_t)args->arg, &d_pio, sizeof(d_pio)); 845 error = fo_ioctl(fp, cmd, (caddr_t)&d_pio, p); 846 return error; 847} 848#endif /* TDFX_LINUX */ 849 850 851/* This is the device driver struct. This is sent to the driver subsystem to 852 * register the method structure and the info strcut space for this particular 853 * instance of the driver. 854 */ 855static driver_t tdfx_driver = { 856 "tdfx", 857 tdfx_methods, 858 sizeof(struct tdfx_softc), 859}; 860 861/* Tell Mr. Kernel about us! */ 862DRIVER_MODULE(tdfx, pci, tdfx_driver, tdfx_devclass, 0, 0); 863 864 865#endif /* NPCI */ 866