tdfx_pci.c revision 63488
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 63488 2000-07-19 05:41:14Z 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 = PCIR_MAPS; 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 = 0; 242 tdfx_info->piorange = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 243 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 244 if(tdfx_info->piorange == NULL) { 245#ifdef DEBUG 246 device_printf(dev, "Couldn't map PIO range."); 247#endif 248 tdfx_info->piorid = 0; 249 } 250 else { 251 tdfx_info->piorid = rid; 252 } 253 } else { 254 tdfx_info->addr1 = 0; 255 tdfx_info->memrange2 = NULL; 256 tdfx_info->piorange = NULL; 257 } 258 259 /* 260 * Set Writecombining, or at least Uncacheable for the memory region, if we 261 * are able to 262 */ 263 264 if(tdfx_setmtrr(dev) != 0) { 265#ifdef DEBUG 266 device_printf(dev, "Some weird error setting MTRRs"); 267#endif 268 return -1; 269 } 270 271 /* 272 * make_dev registers the cdev to access the 3dfx card from /dev 273 * use hex here for the dev num, simply to provide better support if > 10 274 * voodoo cards, for the mad. The user must set the link, or use MAKEDEV. 275 * Why would we want that many voodoo cards anyhow? 276 */ 277 tdfx_info->devt = make_dev(&tdfx_cdev, dev->unit, 0, 0, 02660, 278 "3dfx%x", dev->unit); 279 280 return 0; 281} 282 283static int 284tdfx_detach(device_t dev) { 285 struct tdfx_softc* tdfx_info; 286 int retval; 287 tdfx_info = device_get_softc(dev); 288 289 /* Delete allocated resource, of course */ 290 bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid, 291 tdfx_info->memrange); 292 293 /* Release extended Voodoo3/Banshee resources */ 294 if(pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE || 295 pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) { 296 if(tdfx_info->memrange2 != NULL) 297 bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid2, 298 tdfx_info->memrange); 299 if(tdfx_info->piorange != NULL) 300 bus_release_resource(dev, SYS_RES_IOPORT, tdfx_info->piorid, 301 tdfx_info->piorange); 302 } 303 304 /* Though it is safe to leave the WRCOMB support since the 305 mem driver checks for it, we should remove it in order 306 to free an MTRR for another device */ 307 retval = tdfx_clrmtrr(dev); 308#ifdef DEBUG 309 if(retval != 0) 310 printf("tdfx: For some reason, I couldn't clear the mtrr\n"); 311#endif 312 /* Remove device entry when it can no longer be accessed */ 313 destroy_dev(tdfx_info->devt); 314 return(0); 315} 316 317static int 318tdfx_shutdown(device_t dev) { 319#ifdef DEBUG 320 device_printf(dev, "tdfx: Device Shutdown\n"); 321#endif 322 return 0; 323} 324 325static int 326tdfx_clrmtrr(device_t dev) { 327 /* This function removes the MTRR set by the attach call, so it can be used 328 * in the future by other drivers. 329 */ 330 int retval, act; 331 struct tdfx_softc *tdfx_info = device_get_softc(dev); 332 333 act = MEMRANGE_SET_REMOVE; 334 retval = mem_range_attr_set(&tdfx_info->mrdesc, &act); 335 return retval; 336} 337 338static int 339tdfx_setmtrr(device_t dev) { 340 /* 341 * This is the MTRR setting function for the 3dfx card. It is called from 342 * tdfx_attach. If we can't set the MTRR properly, it's not the end of the 343 * world. We can still continue, just with slightly (very slightly) degraded 344 * performance. 345 */ 346 int retval = 0, act; 347 struct tdfx_softc *tdfx_info = device_get_softc(dev); 348 349 /* The older Voodoo cards have a shorter memrange than the newer ones */ 350 if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1) || (pci_get_devid(dev) == 351 PCI_DEVICE_3DFX_VOODOO2)) { 352 tdfx_info->mrdesc.mr_len = 0x400000; 353 354 /* The memory descriptor is described as the top 15 bits of the real 355 address */ 356 tdfx_info->mrdesc.mr_base = tdfx_info->addr0 & 0xfffe0000; 357 } 358 else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) || 359 (pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE)) { 360 tdfx_info->mrdesc.mr_len = 0x1000000; 361 /* The Voodoo3 and Banshee LFB is the second memory address */ 362 /* The memory descriptor is described as the top 15 bits of the real 363 address */ 364 tdfx_info->mrdesc.mr_base = tdfx_info->addr1 & 0xfffe0000; 365 } 366 else 367 return 0; 368 /* 369 * The Alliance Pro Motion AT3D was not mentioned in the linux 370 * driver as far as MTRR support goes, so I just won't put the 371 * code in here for it. This is where it should go, though. 372 */ 373 374 /* Firstly, try to set write combining */ 375 tdfx_info->mrdesc.mr_flags = MDF_WRITECOMBINE; 376 bcopy("tdfx", &tdfx_info->mrdesc.mr_owner, 4); 377 act = MEMRANGE_SET_UPDATE; 378 retval = mem_range_attr_set(&tdfx_info->mrdesc, &act); 379 380 if(retval == 0) { 381#ifdef DEBUG 382 device_printf(dev, "MTRR Set Correctly for tdfx\n"); 383#endif 384 } else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO2) || 385 (pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1)) { 386 /* if, for some reason we can't set the WRCOMB range with the V1/V2, we 387 * can still possibly use the UNCACHEABLE region for it instead, and help 388 * out in a small way */ 389 tdfx_info->mrdesc.mr_flags = MDF_UNCACHEABLE; 390 /* This length of 1000h was taken from the linux device driver... */ 391 tdfx_info->mrdesc.mr_len = 0x1000; 392 393 /* 394 * If, for some reason, we can't set the MTRR (N/A?) we may still continue 395 */ 396#ifdef DEBUG 397 if(retval == 0) { 398 device_printf(dev, "MTRR Set Type Uncacheable 399 %x\n", (u_int32_t)tdfx_info->mrdesc.mr_base); 400 } else { 401 device_printf(dev, "Couldn't Set MTRR\n"); 402 } 403#endif 404 } 405#ifdef DEBUG 406 else { 407 device_printf(dev, "Couldn't Set MTRR\n"); 408 return 0; 409 } 410#endif 411 return 0; 412} 413 414static int 415tdfx_open(dev_t dev, int flags, int fmt, struct proc *p) 416{ 417 /* 418 * The open cdev method handles open(2) calls to /dev/3dfx[n] 419 * We can pretty much allow any opening of the device. 420 */ 421 struct tdfx_softc *tdfx_info = devclass_get_softc(tdfx_devclass, 422 UNIT(minor(dev))); 423 if(tdfx_info->busy != 0) return EBUSY; 424#ifdef DEBUG 425 printf("3dfx: Opened by #%d\n", p->p_pid); 426#endif 427 /* Set the driver as busy */ 428 tdfx_info->busy++; 429 return 0; 430} 431 432static int 433tdfx_close(dev_t dev, int fflag, int devtype, struct proc* p) 434{ 435 /* 436 * The close cdev method handles close(2) calls to /dev/3dfx[n] 437 * We'll always want to close the device when it's called. 438 */ 439 struct tdfx_softc *tdfx_info = devclass_get_softc(tdfx_devclass, 440 UNIT(minor(dev))); 441 if(tdfx_info->busy == 0) return EBADF; 442 tdfx_info->busy = 0; 443#ifdef DEBUG 444 printf("Closed by #%d\n", p->p_pid); 445#endif 446 return 0; 447} 448 449static int 450tdfx_mmap(dev_t dev, vm_offset_t offset, int nprot) 451{ 452 /* 453 * mmap(2) is called by a user process to request that an area of memory 454 * associated with this device be mapped for the process to work with. Nprot 455 * holds the protections requested, PROT_READ, PROT_WRITE, or both. 456 */ 457 struct tdfx_softc* tdfx_info; 458 459 /* Get the configuration for our card XXX*/ 460 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 461 UNIT(minor(dev))); 462 463 /* If, for some reason, its not configured, we bail out */ 464 if(tdfx_info == NULL) { 465#ifdef DEBUG 466 printf("tdfx: tdfx_info (softc) is NULL\n"); 467#endif 468 return -1; 469 } 470 471 /* We must stay within the bound of our address space */ 472 if((offset & 0xff000000) == tdfx_info->addr0) 473 offset &= 0xffffff; 474 475 /* See if the Banshee/V3 LFB is being requested */ 476 if(tdfx_info->memrange2 != NULL && (offset & 0xff000000) == 477 tdfx_info->addr1) 478 offset &= 0xffffff; 479 480 if((offset >= 0x1000000) || (offset < 0)) { 481#ifdef DEBUG 482 printf("tdfx: offset %x out of range\n", offset); 483#endif 484 return -1; 485 } 486 487 /* atop -> address to page 488 * rman_get_start, get the (struct resource*)->r_start member, 489 * the mapping base address. 490 */ 491 return atop(rman_get_start(tdfx_info->memrange) + offset); 492} 493 494static int 495tdfx_query_boards(void) { 496 /* 497 * This returns the number of installed tdfx cards, we have been keeping 498 * count, look at tdfx_attach 499 */ 500 return tdfx_count; 501} 502 503static int 504tdfx_query_fetch(u_int cmd, struct tdfx_pio_data *piod) 505{ 506 /* XXX Comment this later, after careful inspection and spring cleaning :) */ 507 /* Various return values 8bit-32bit */ 508 u_int8_t ret_byte; 509 u_int16_t ret_word; 510 u_int32_t ret_dword; 511 struct tdfx_softc* tdfx_info = NULL; 512 513 /* This one depend on the tdfx_* structs being properly initialized */ 514 515 /*piod->device &= 0xf;*/ 516 if((piod == NULL) ||(tdfx_count <= piod->device) || 517 (piod->device < 0)) { 518#ifdef DEBUG 519 printf("tdfx: Bad device or internal struct in tdfx_query_fetch\n"); 520#endif 521 return -EINVAL; 522 } 523 524 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 525 piod->device); 526 527 if(tdfx_info == NULL) return -ENXIO; 528 529 /* We must restrict the size reads from the port, since to high or low of a 530 * size witll result in wrong data being passed, and that's bad */ 531 /* A few of these were pulled during the attach phase */ 532 switch(piod->port) { 533 case PCI_VENDOR_ID_FREEBSD: 534 if(piod->size != 2) return -EINVAL; 535 copyout(&tdfx_info->vendor, piod->value, piod->size); 536 return 0; 537 case PCI_DEVICE_ID_FREEBSD: 538 if(piod->size != 2) return -EINVAL; 539 copyout(&tdfx_info->type, piod->value, piod->size); 540 return 0; 541 case PCI_BASE_ADDRESS_0_FREEBSD: 542 if(piod->size != 4) return -EINVAL; 543 copyout(&tdfx_info->addr0, piod->value, piod->size); 544 return 0; 545 case SST1_PCI_SPECIAL1_FREEBSD: 546 if(piod->size != 4) return -EINVAL; 547 break; 548 case PCI_REVISION_ID_FREEBSD: 549 if(piod->size != 1) return -EINVAL; 550 break; 551 case SST1_PCI_SPECIAL4_FREEBSD: 552 if(piod->size != 4) return -EINVAL; 553 break; 554 default: 555 return -EINVAL; 556 } 557 558 559 /* Read the value and return */ 560 switch(piod->size) { 561 case 1: 562 ret_byte = pci_read_config(tdfx_info[piod->device].dev, 563 piod->port, 1); 564 copyout(&ret_byte, piod->value, 1); 565 break; 566 case 2: 567 ret_word = pci_read_config(tdfx_info[piod->device].dev, 568 piod->port, 2); 569 copyout(&ret_word, piod->value, 2); 570 break; 571 case 4: 572 ret_dword = pci_read_config(tdfx_info[piod->device].dev, 573 piod->port, 4); 574 copyout(&ret_dword, piod->value, 4); 575 break; 576 default: 577 return -EINVAL; 578 } 579 return 0; 580} 581 582static int 583tdfx_query_update(u_int cmd, struct tdfx_pio_data *piod) 584{ 585 /* XXX Comment this later, after careful inspection and spring cleaning :) */ 586 /* Return vals */ 587 u_int8_t ret_byte; 588 u_int16_t ret_word; 589 u_int32_t ret_dword; 590 591 /* Port vals, mask */ 592 u_int32_t retval, preval, mask; 593 struct tdfx_softc* tdfx_info = NULL; 594 595 596 if((piod == NULL) || (piod->device >= (tdfx_count & 597 0xf))) { 598#ifdef DEBUG 599 printf("tdfx: Bad struct or device in tdfx_query_update\n"); 600#endif 601 return -EINVAL; 602 } 603 604 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 605 piod->device); 606 if(tdfx_info == NULL) return -ENXIO; 607 /* Code below this line in the fuction was taken from the 608 * Linux driver and converted for freebsd. */ 609 610 /* Check the size for all the ports, to make sure stuff doesn't get messed up 611 * by poorly written clients */ 612 613 switch(piod->port) { 614 case PCI_COMMAND_FREEBSD: 615 if(piod->size != 2) return -EINVAL; 616 break; 617 case SST1_PCI_SPECIAL1_FREEBSD: 618 if(piod->size != 4) return -EINVAL; 619 break; 620 case SST1_PCI_SPECIAL2_FREEBSD: 621 if(piod->size != 4) return -EINVAL; 622 break; 623 case SST1_PCI_SPECIAL3_FREEBSD: 624 if(piod->size != 4) return -EINVAL; 625 break; 626 case SST1_PCI_SPECIAL4_FREEBSD: 627 if(piod->size != 4) return -EINVAL; 628 break; 629 default: 630 return -EINVAL; 631 } 632 /* Read the current value */ 633 retval = pci_read_config(tdfx_info->dev, piod->port & ~3, 4); 634 635 /* These set up a mask to use, since apparently they wanted to write 4 bytes 636 * at once to the ports */ 637 switch (piod->size) { 638 case 1: 639 copyin(piod->value, &ret_byte, 1); 640 preval = ret_byte << (8 * (piod->port & 0x3)); 641 mask = 0xff << (8 * (piod->port & 0x3)); 642 break; 643 case 2: 644 copyin(piod->value, &ret_word, 2); 645 preval = ret_word << (8 * (piod->port & 0x3)); 646 mask = 0xffff << (8 * (piod->port & 0x3)); 647 break; 648 case 4: 649 copyin(piod->value, &ret_dword, 4); 650 preval = ret_dword; 651 mask = ~0; 652 break; 653 default: 654 return -EINVAL; 655 } 656 /* Finally, combine the values and write it to the port */ 657 retval = (retval & ~mask) | preval; 658 pci_write_config(tdfx_info->dev, piod->port & ~3, retval, 4); 659 660 return 0; 661} 662 663/* For both of these, I added a variable named workport of type u_int so 664 * that I could eliminate the warning about my data type size. The 665 * applications expect the port to be of type short, so I needed to change 666 * this within the function */ 667static int 668tdfx_do_pio_rd(struct tdfx_pio_data *piod) 669{ 670 /* Return val */ 671 u_int8_t ret_byte; 672 u_int workport; 673 /* Restricts the access of ports other than those we use */ 674 if((piod->port != VGA_INPUT_STATUS_1C) || (piod->port != SC_INDEX) || 675 (piod->port != SC_DATA) || (piod->port != VGA_MISC_OUTPUT_READ)) 676 return -EPERM; 677 678 /* All VGA STATUS REGS are byte registers, size should never be > 1 */ 679 if(piod->size != 1) { 680 return -EINVAL; 681 } 682 683 /* Write the data to the intended port */ 684 workport = piod->port; 685 ret_byte = inb(workport); 686 copyout(&ret_byte, piod->value, sizeof(u_int8_t)); 687 return 0; 688} 689 690static int 691tdfx_do_pio_wt(struct tdfx_pio_data *piod) 692{ 693 /* return val */ 694 u_int8_t ret_byte; 695 u_int workport; 696 /* Replace old switch w/ massive if(...) */ 697 /* Restricts the access of ports other than those we use */ 698 if((piod->port != SC_INDEX) && (piod->port != SC_DATA) && 699 (piod->port != VGA_MISC_OUTPUT_READ)) /* Can't write VGA_ST_1C */ 700 return -EPERM; 701 702 /* All VGA STATUS REGS are byte registers, size should never be > 1 */ 703 if(piod->size != 1) { 704 return -EINVAL; 705 } 706 707 /* Write the data to the intended port */ 708 copyin(piod->value, &ret_byte, sizeof(u_int8_t)); 709 workport = piod->port; 710 outb(workport, ret_byte); 711 return 0; 712} 713 714static int 715tdfx_do_query(u_int cmd, struct tdfx_pio_data *piod) 716{ 717 /* There are three sub-commands to the query 0x33 */ 718 switch(_IOC_NR(cmd)) { 719 case 2: 720 return tdfx_query_boards(); 721 break; 722 case 3: 723 return tdfx_query_fetch(cmd, piod); 724 break; 725 case 4: 726 return tdfx_query_update(cmd, piod); 727 break; 728 default: 729 /* In case we are thrown a bogus sub-command! */ 730#ifdef DEBUG 731 printf("Bad Sub-cmd: 0x%x\n", _IOC_NR(cmd)); 732#endif 733 return -EINVAL; 734 }; 735} 736 737static int 738tdfx_do_pio(u_int cmd, struct tdfx_pio_data *piod) 739{ 740 /* Two types of PIO, INPUT and OUTPUT, as the name suggests */ 741 switch(_IOC_DIR(cmd)) { 742 case IOCV_OUT: 743 return tdfx_do_pio_rd(piod); 744 break; 745 case IOCV_IN: 746 return tdfx_do_pio_wt(piod); 747 break; 748 default: 749 return -EINVAL; 750 }; 751} 752 753/* Calls to ioctl(2) eventually end up here. Unhandled ioctls return an ENXIO, 754 * normally, you would read in the data pointed to by data, then write your 755 * output to it. The ioctl *should* normally return zero if everything is 756 * alright, but 3dfx didn't make it that way... 757 * 758 * For all of the ioctl code, in the event of a real error, 759 * we return -Exxxx rather than simply Exxxx. The reason for this 760 * is that the ioctls actually RET information back to the program 761 * sometimes, rather than filling it in the passed structure. We 762 * want to distinguish errors from useful data, and maintain compatibility. 763 * 764 * There is this portion of the proc struct called p_retval[], we can store a 765 * return value in p->p_retval[0] and place the return value if it is positive 766 * in there, then we can return 0 (good). If the return value is negative, we 767 * can return -retval and the error should be properly handled. 768 */ 769static int 770tdfx_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc * p) 771{ 772 int retval = 0; 773 struct tdfx_pio_data *piod = (struct tdfx_pio_data*)data; 774#ifdef DEBUG 775 printf("IOCTL'd by #%d, cmd: 0x%x, data: 0x%x\n", p->p_pid, (u_int32_t)cmd, 776 (unsigned int)piod); 777#endif 778 switch(_IOC_TYPE(cmd)) { 779 /* Return the real error if negative, or simply stick the valid return 780 * in p->p_retval */ 781 case 0x33: 782 /* The '3'(0x33) type IOCTL is for querying the installed cards */ 783 if((retval = tdfx_do_query(cmd, piod)) > 0) p->p_retval[0] = retval; 784 else return -retval; 785 break; 786 case 0: 787 /* The 0 type IOCTL is for programmed I/O methods */ 788 if((tdfx_do_pio(cmd, piod)) > 0) p->p_retval[0] = retval; 789 else return -retval; 790 break; 791 default: 792 /* Technically, we won't reach this from linux emu, but when glide 793 * finally gets ported, watch out! */ 794#ifdef DEBUG 795 printf("Bad IOCTL from #%d\n", p->p_pid); 796#endif 797 return ENXIO; 798 } 799 800 return 0; 801} 802 803#ifdef TDFX_LINUX 804/* 805 * Linux emulation IOCTL for /dev/tdfx 806 */ 807static int 808linux_ioctl_tdfx(struct proc* p, struct linux_ioctl_args* args) 809{ 810 int error = 0; 811 u_long cmd = args->cmd & 0xffff; 812 813 /* The structure passed to ioctl has two shorts, one int 814 and one void*. */ 815 char d_pio[2*sizeof(short) + sizeof(int) + sizeof(void*)]; 816 817 struct file *fp = p->p_fd->fd_ofiles[args->fd]; 818 819 /* We simply copy the data and send it right to ioctl */ 820 copyin((caddr_t)args->arg, &d_pio, sizeof(d_pio)); 821 error = fo_ioctl(fp, cmd, (caddr_t)&d_pio, p); 822 return error; 823} 824#endif /* TDFX_LINUX */ 825 826 827/* This is the device driver struct. This is sent to the driver subsystem to 828 * register the method structure and the info strcut space for this particular 829 * instance of the driver. 830 */ 831static driver_t tdfx_driver = { 832 "tdfx", 833 tdfx_methods, 834 sizeof(struct tdfx_softc), 835}; 836 837/* Tell Mr. Kernel about us! */ 838DRIVER_MODULE(tdfx, pci, tdfx_driver, tdfx_devclass, 0, 0); 839 840 841#endif /* NPCI */ 842