Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/tdfx/tdfx_pci.c
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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: src/sys/dev/tdfx/tdfx_pci.c,v 1.35.2.1 2005/03/03 04:47:55 obrien Exp $"); 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/module.h> 54 #include <sys/malloc.h> 55 #include <sys/mman.h> 56 #include <sys/signalvar.h> 57 #include <sys/systm.h> 58 #include <sys/uio.h> 59 60 #include <dev/pci/pcivar.h> 61 #include <dev/pci/pcireg.h> 62 63 #include <vm/vm.h> 64 #include <vm/vm_kern.h> 65 #include <vm/pmap.h> 66 #include <vm/vm_extern.h> 67 68 /* rman.h depends on machine/bus.h */ 69 #include <machine/resource.h> 70 #include <machine/bus.h> 71 #include <sys/rman.h> 72 73 /* This must come first */ 74 #include "opt_tdfx.h" 75 #ifdef TDFX_LINUX 76 #include <dev/tdfx/tdfx_linux.h> 77 #endif 78 79 #include <dev/tdfx/tdfx_io.h> 80 #include <dev/tdfx/tdfx_vars.h> 81 #include <dev/tdfx/tdfx_pci.h> 82 83 84 static devclass_t tdfx_devclass; 85 86 87 static int tdfx_count = 0; 88 89 90 /* Set up the boot probe/attach routines */ 91 static device_method_t tdfx_methods[] = { 92 DEVMETHOD(device_probe, tdfx_probe), 93 DEVMETHOD(device_attach, tdfx_attach), 94 DEVMETHOD(device_detach, tdfx_detach), 95 DEVMETHOD(device_shutdown, tdfx_shutdown), 96 { 0, 0 } 97 }; 98 99 MALLOC_DEFINE(M_TDFX,"TDFX Driver","3DFX Graphics[/2D]/3D Accelerator(s)"); 100 101 #ifdef TDFX_LINUX 102 MODULE_DEPEND(tdfx, linux, 1, 1, 1); 103 LINUX_IOCTL_SET(tdfx, LINUX_IOCTL_TDFX_MIN, LINUX_IOCTL_TDFX_MAX); 104 #endif 105 106 /* Char. Dev. file operations structure */ 107 static struct cdevsw tdfx_cdev = { 108 .d_version = D_VERSION, 109 .d_flags = D_NEEDGIANT, 110 .d_open = tdfx_open, 111 .d_close = tdfx_close, 112 .d_ioctl = tdfx_ioctl, 113 .d_mmap = tdfx_mmap, 114 .d_name = "tdfx", 115 }; 116 117 static int 118 tdfx_probe(device_t dev) 119 { 120 /* 121 * probe routine called on kernel boot to register supported devices. We get 122 * a device structure to work with, and we can test the VENDOR/DEVICE IDs to 123 * see if this PCI device is one that we support. Return BUS_PRROBE_DEFAULT 124 * if yes, ENXIO if not. 125 */ 126 switch(pci_get_devid(dev)) { 127 case PCI_DEVICE_ALLIANCE_AT3D: 128 device_set_desc(dev, "ProMotion At3D 3D Accelerator"); 129 return BUS_PROBE_DEFAULT; 130 case PCI_DEVICE_3DFX_VOODOO2: 131 device_set_desc(dev, "3DFX Voodoo II 3D Accelerator"); 132 return BUS_PROBE_DEFAULT; 133 /*case PCI_DEVICE_3DFX_BANSHEE: 134 device_set_desc(dev, "3DFX Voodoo Banshee 2D/3D Graphics Accelerator"); 135 return BUS_PROBE_DEFAULT; 136 case PCI_DEVICE_3DFX_VOODOO3: 137 device_set_desc(dev, "3DFX Voodoo3 2D/3D Graphics Accelerator"); 138 return BUS_PROBE_DEFAULT;*/ 139 case PCI_DEVICE_3DFX_VOODOO1: 140 device_set_desc(dev, "3DFX Voodoo Graphics 3D Accelerator"); 141 return BUS_PROBE_DEFAULT; 142 }; 143 144 return ENXIO; 145 } 146 147 static int 148 tdfx_attach(device_t dev) { 149 /* 150 * The attach routine is called after the probe routine successfully says it 151 * supports a given card. We now proceed to initialize this card for use with 152 * the system. I want to map the device memory for userland allocation and 153 * fill an information structure with information on this card. I'd also like 154 * to set Write Combining with the MTRR code so that we can hopefully speed 155 * up memory writes. The last thing is to register the character device 156 * interface to the card, so we can open it from /dev/3dfxN, where N is a 157 * small, whole number. 158 */ 159 struct tdfx_softc *tdfx_info; 160 u_long val; 161 /* rid value tells bus_alloc_resource where to find the addresses of ports or 162 * of memory ranges in the PCI config space*/ 163 int rid = PCIR_BAR(0); 164 165 /* Increment the card counter (for the ioctl code) */ 166 tdfx_count++; 167 168 /* Enable MemMap on Voodoo */ 169 val = pci_read_config(dev, PCIR_COMMAND, 2); 170 val |= (PCIM_CMD_MEMEN); 171 pci_write_config(dev, PCIR_COMMAND, val, 2); 172 val = pci_read_config(dev, PCIR_COMMAND, 2); 173 174 /* Fill the soft config struct with info about this device*/ 175 tdfx_info = device_get_softc(dev); 176 tdfx_info->dev = dev; 177 tdfx_info->vendor = pci_get_vendor(dev); 178 tdfx_info->type = pci_get_devid(dev) >> 16; 179 tdfx_info->bus = pci_get_bus(dev); 180 tdfx_info->dv = pci_get_slot(dev); 181 tdfx_info->curFile = NULL; 182 183 /* 184 * Get the Memory Location from the PCI Config, mask out lower word, since 185 * the config space register is only one word long (this is nicer than a 186 * bitshift). 187 */ 188 tdfx_info->addr0 = (pci_read_config(dev, 0x10, 4) & 0xffff0000); 189 #ifdef DEBUG 190 device_printf(dev, "Base0 @ 0x%x\n", tdfx_info->addr0); 191 #endif 192 /* Notify the VM that we will be mapping some memory later */ 193 tdfx_info->memrange = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 194 &rid, RF_ACTIVE | RF_SHAREABLE); 195 if(tdfx_info->memrange == NULL) { 196 #ifdef DEBUG 197 device_printf(dev, "Error mapping mem, won't be able to use mmap()\n"); 198 #endif 199 tdfx_info->memrid = 0; 200 } 201 else { 202 tdfx_info->memrid = rid; 203 #ifdef DEBUG 204 device_printf(dev, "Mapped to: 0x%x\n", 205 (unsigned int)rman_get_start(tdfx_info->memrange)); 206 #endif 207 } 208 209 /* Setup for Voodoo3 and Banshee, PIO and an extram Memrange */ 210 if(pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3 || 211 pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE) { 212 rid = 0x14; /* 2nd mem map */ 213 tdfx_info->addr1 = (pci_read_config(dev, 0x14, 4) & 0xffff0000); 214 #ifdef DEBUG 215 device_printf(dev, "Base1 @ 0x%x\n", tdfx_info->addr1); 216 #endif 217 tdfx_info->memrange2 = bus_alloc_resource_any(dev, 218 SYS_RES_MEMORY, &rid, RF_ACTIVE | RF_SHAREABLE); 219 if(tdfx_info->memrange2 == NULL) { 220 #ifdef DEBUG 221 device_printf(dev, "Mem1 couldn't be allocated, glide may not work."); 222 #endif 223 tdfx_info->memrid2 = 0; 224 } 225 else { 226 tdfx_info->memrid2 = rid; 227 } 228 /* Now to map the PIO stuff */ 229 rid = PCIR_IOBASE0_2; 230 tdfx_info->pio0 = pci_read_config(dev, 0x2c, 2); 231 tdfx_info->pio0max = pci_read_config(dev, 0x30, 2) + tdfx_info->pio0; 232 tdfx_info->piorange = bus_alloc_resource_any(dev, 233 SYS_RES_IOPORT, &rid, RF_ACTIVE | RF_SHAREABLE); 234 if(tdfx_info->piorange == NULL) { 235 #ifdef DEBUG 236 device_printf(dev, "Couldn't map PIO range."); 237 #endif 238 tdfx_info->piorid = 0; 239 } 240 else { 241 tdfx_info->piorid = rid; 242 } 243 } else { 244 tdfx_info->addr1 = 0; 245 tdfx_info->memrange2 = NULL; 246 tdfx_info->piorange = NULL; 247 } 248 249 /* 250 * Set Writecombining, or at least Uncacheable for the memory region, if we 251 * are able to 252 */ 253 254 if(tdfx_setmtrr(dev) != 0) { 255 #ifdef DEBUG 256 device_printf(dev, "Some weird error setting MTRRs"); 257 #endif 258 return -1; 259 } 260 261 /* 262 * make_dev registers the cdev to access the 3dfx card from /dev 263 * use hex here for the dev num, simply to provide better support if > 10 264 * voodoo cards, for the mad. The user must set the link, or use MAKEDEV. 265 * Why would we want that many voodoo cards anyhow? 266 */ 267 tdfx_info->devt = make_dev(&tdfx_cdev, device_get_unit(dev), 268 UID_ROOT, GID_WHEEL, 0600, "3dfx%x", device_get_unit(dev)); 269 270 return 0; 271 } 272 273 static int 274 tdfx_detach(device_t dev) { 275 struct tdfx_softc* tdfx_info; 276 int retval; 277 tdfx_info = device_get_softc(dev); 278 279 /* Delete allocated resource, of course */ 280 bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid, 281 tdfx_info->memrange); 282 283 /* Release extended Voodoo3/Banshee resources */ 284 if(pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE || 285 pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) { 286 if(tdfx_info->memrange2 != NULL) 287 bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid2, 288 tdfx_info->memrange); 289 /* if(tdfx_info->piorange != NULL) 290 bus_release_resource(dev, SYS_RES_IOPORT, tdfx_info->piorid, 291 tdfx_info->piorange);*/ 292 } 293 294 /* Though it is safe to leave the WRCOMB support since the 295 mem driver checks for it, we should remove it in order 296 to free an MTRR for another device */ 297 retval = tdfx_clrmtrr(dev); 298 #ifdef DEBUG 299 if(retval != 0) 300 printf("tdfx: For some reason, I couldn't clear the mtrr\n"); 301 #endif 302 /* Remove device entry when it can no longer be accessed */ 303 destroy_dev(tdfx_info->devt); 304 return(0); 305 } 306 307 static int 308 tdfx_shutdown(device_t dev) { 309 #ifdef DEBUG 310 device_printf(dev, "tdfx: Device Shutdown\n"); 311 #endif 312 return 0; 313 } 314 315 static int 316 tdfx_clrmtrr(device_t dev) { 317 /* This function removes the MTRR set by the attach call, so it can be used 318 * in the future by other drivers. 319 */ 320 int retval, act; 321 struct tdfx_softc *tdfx_info = device_get_softc(dev); 322 323 act = MEMRANGE_SET_REMOVE; 324 retval = mem_range_attr_set(&tdfx_info->mrdesc, &act); 325 return retval; 326 } 327 328 static int 329 tdfx_setmtrr(device_t dev) { 330 /* 331 * This is the MTRR setting function for the 3dfx card. It is called from 332 * tdfx_attach. If we can't set the MTRR properly, it's not the end of the 333 * world. We can still continue, just with slightly (very slightly) degraded 334 * performance. 335 */ 336 int retval = 0, act; 337 struct tdfx_softc *tdfx_info = device_get_softc(dev); 338 339 /* The older Voodoo cards have a shorter memrange than the newer ones */ 340 if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1) || (pci_get_devid(dev) == 341 PCI_DEVICE_3DFX_VOODOO2)) { 342 tdfx_info->mrdesc.mr_len = 0x400000; 343 344 /* The memory descriptor is described as the top 15 bits of the real 345 address */ 346 tdfx_info->mrdesc.mr_base = tdfx_info->addr0 & 0xfffe0000; 347 } 348 else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) || 349 (pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE)) { 350 tdfx_info->mrdesc.mr_len = 0x1000000; 351 /* The Voodoo3 and Banshee LFB is the second memory address */ 352 /* The memory descriptor is described as the top 15 bits of the real 353 address */ 354 tdfx_info->mrdesc.mr_base = tdfx_info->addr1 & 0xfffe0000; 355 } 356 else 357 return 0; 358 /* 359 * The Alliance Pro Motion AT3D was not mentioned in the linux 360 * driver as far as MTRR support goes, so I just won't put the 361 * code in here for it. This is where it should go, though. 362 */ 363 364 /* Firstly, try to set write combining */ 365 tdfx_info->mrdesc.mr_flags = MDF_WRITECOMBINE; 366 bcopy("tdfx", &tdfx_info->mrdesc.mr_owner, 4); 367 act = MEMRANGE_SET_UPDATE; 368 retval = mem_range_attr_set(&tdfx_info->mrdesc, &act); 369 370 if(retval == 0) { 371 #ifdef DEBUG 372 device_printf(dev, "MTRR Set Correctly for tdfx\n"); 373 #endif 374 } else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO2) || 375 (pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1)) { 376 /* if, for some reason we can't set the WRCOMB range with the V1/V2, we 377 * can still possibly use the UNCACHEABLE region for it instead, and help 378 * out in a small way */ 379 tdfx_info->mrdesc.mr_flags = MDF_UNCACHEABLE; 380 /* This length of 1000h was taken from the linux device driver... */ 381 tdfx_info->mrdesc.mr_len = 0x1000; 382 383 /* 384 * If, for some reason, we can't set the MTRR (N/A?) we may still continue 385 */ 386 #ifdef DEBUG 387 device_printf(dev, "MTRR Set Type Uncacheable %x\n", 388 (u_int32_t)tdfx_info->mrdesc.mr_base); 389 #endif 390 } 391 #ifdef DEBUG 392 else { 393 device_printf(dev, "Couldn't Set MTRR\n"); 394 return 0; 395 } 396 #endif 397 return 0; 398 } 399 400 static int 401 tdfx_open(struct cdev *dev, int flags, int fmt, struct thread *td) 402 { 403 /* 404 * The open cdev method handles open(2) calls to /dev/3dfx[n] 405 * We can pretty much allow any opening of the device. 406 */ 407 struct tdfx_softc *tdfx_info = devclass_get_softc(tdfx_devclass, 408 UNIT(minor(dev))); 409 if(tdfx_info->busy != 0) return EBUSY; 410 #ifdef DEBUG 411 printf("3dfx: Opened by #%d\n", td->td_proc->p_pid); 412 #endif 413 /* Set the driver as busy */ 414 tdfx_info->busy++; 415 return 0; 416 } 417 418 static int 419 tdfx_close(struct cdev *dev, int fflag, int devtype, struct thread *td) 420 { 421 /* 422 * The close cdev method handles close(2) calls to /dev/3dfx[n] 423 * We'll always want to close the device when it's called. 424 */ 425 struct tdfx_softc *tdfx_info = devclass_get_softc(tdfx_devclass, 426 UNIT(minor(dev))); 427 if(tdfx_info->busy == 0) return EBADF; 428 tdfx_info->busy = 0; 429 #ifdef DEBUG 430 printf("Closed by #%d\n", td->td_proc->p_pid); 431 #endif 432 return 0; 433 } 434 435 static int 436 tdfx_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) 437 { 438 /* 439 * mmap(2) is called by a user process to request that an area of memory 440 * associated with this device be mapped for the process to work with. Nprot 441 * holds the protections requested, PROT_READ, PROT_WRITE, or both. 442 */ 443 444 /**** OLD GET CONFIG ****/ 445 /* struct tdfx_softc* tdfx_info; */ 446 447 /* Get the configuration for our card XXX*/ 448 /*tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 449 UNIT(minor(dev)));*/ 450 /************************/ 451 452 struct tdfx_softc* tdfx_info[2]; 453 454 tdfx_info[0] = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 0); 455 456 /* If, for some reason, its not configured, we bail out */ 457 if(tdfx_info[0] == NULL) { 458 #ifdef DEBUG 459 printf("tdfx: tdfx_info (softc) is NULL\n"); 460 #endif 461 return -1; 462 } 463 464 /* We must stay within the bound of our address space */ 465 if((offset & 0xff000000) == tdfx_info[0]->addr0) { 466 offset &= 0xffffff; 467 *paddr = rman_get_start(tdfx_info[0]->memrange) + offset; 468 return 0; 469 } 470 471 if(tdfx_count > 1) { 472 tdfx_info[1] = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 1); 473 if((offset & 0xff000000) == tdfx_info[1]->addr0) { 474 offset &= 0xffffff; 475 *paddr = rman_get_start(tdfx_info[1]->memrange) + 476 offset; 477 return 0; 478 } 479 } 480 481 /* See if the Banshee/V3 LFB is being requested */ 482 /*if(tdfx_info->memrange2 != NULL && (offset & 0xff000000) == 483 tdfx_info->addr1) { 484 offset &= 0xffffff; 485 return atop(rman_get_start(tdfx_info[1]->memrange2) + offset); 486 }*/ /* VoodooNG code */ 487 488 /* The ret call */ 489 /* atop -> address to page 490 * rman_get_start, get the (struct resource*)->r_start member, 491 * the mapping base address. 492 */ 493 return -1; 494 } 495 496 static int 497 tdfx_query_boards(void) { 498 /* 499 * This returns the number of installed tdfx cards, we have been keeping 500 * count, look at tdfx_attach 501 */ 502 return tdfx_count; 503 } 504 505 static int 506 tdfx_query_fetch(u_int cmd, struct tdfx_pio_data *piod) 507 { 508 /* XXX Comment this later, after careful inspection and spring cleaning :) */ 509 /* Various return values 8bit-32bit */ 510 u_int8_t ret_byte; 511 u_int16_t ret_word; 512 u_int32_t ret_dword; 513 struct tdfx_softc* tdfx_info = NULL; 514 515 /* This one depend on the tdfx_* structs being properly initialized */ 516 517 /*piod->device &= 0xf;*/ 518 if((piod == NULL) ||(tdfx_count <= piod->device) || 519 (piod->device < 0)) { 520 #ifdef DEBUG 521 printf("tdfx: Bad device or internal struct in tdfx_query_fetch\n"); 522 #endif 523 return -EINVAL; 524 } 525 526 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 527 piod->device); 528 529 if(tdfx_info == NULL) return -ENXIO; 530 531 /* We must restrict the size reads from the port, since to high or low of a 532 * size witll result in wrong data being passed, and that's bad */ 533 /* A few of these were pulled during the attach phase */ 534 switch(piod->port) { 535 case PCI_VENDOR_ID_FREEBSD: 536 if(piod->size != 2) return -EINVAL; 537 copyout(&tdfx_info->vendor, piod->value, piod->size); 538 return 0; 539 case PCI_DEVICE_ID_FREEBSD: 540 if(piod->size != 2) return -EINVAL; 541 copyout(&tdfx_info->type, piod->value, piod->size); 542 return 0; 543 case PCI_BASE_ADDRESS_0_FREEBSD: 544 if(piod->size != 4) return -EINVAL; 545 copyout(&tdfx_info->addr0, piod->value, piod->size); 546 return 0; 547 case PCI_BASE_ADDRESS_1_FREEBSD: 548 if(piod->size != 4) return -EINVAL; 549 copyout(&tdfx_info->addr1, piod->value, piod->size); 550 return 0; 551 case PCI_PRIBUS_FREEBSD: 552 if(piod->size != 1) return -EINVAL; 553 break; 554 case PCI_IOBASE_0_FREEBSD: 555 if(piod->size != 2) return -EINVAL; 556 break; 557 case PCI_IOLIMIT_0_FREEBSD: 558 if(piod->size != 2) return -EINVAL; 559 break; 560 case SST1_PCI_SPECIAL1_FREEBSD: 561 if(piod->size != 4) return -EINVAL; 562 break; 563 case PCI_REVISION_ID_FREEBSD: 564 if(piod->size != 1) return -EINVAL; 565 break; 566 case SST1_PCI_SPECIAL4_FREEBSD: 567 if(piod->size != 4) return -EINVAL; 568 break; 569 default: 570 return -EINVAL; 571 } 572 573 574 /* Read the value and return */ 575 switch(piod->size) { 576 case 1: 577 ret_byte = pci_read_config(tdfx_info[piod->device].dev, 578 piod->port, 1); 579 copyout(&ret_byte, piod->value, 1); 580 break; 581 case 2: 582 ret_word = pci_read_config(tdfx_info[piod->device].dev, 583 piod->port, 2); 584 copyout(&ret_word, piod->value, 2); 585 break; 586 case 4: 587 ret_dword = pci_read_config(tdfx_info[piod->device].dev, 588 piod->port, 4); 589 copyout(&ret_dword, piod->value, 4); 590 break; 591 default: 592 return -EINVAL; 593 } 594 return 0; 595 } 596 597 static int 598 tdfx_query_update(u_int cmd, struct tdfx_pio_data *piod) 599 { 600 /* XXX Comment this later, after careful inspection and spring cleaning :) */ 601 /* Return vals */ 602 u_int8_t ret_byte; 603 u_int16_t ret_word; 604 u_int32_t ret_dword; 605 606 /* Port vals, mask */ 607 u_int32_t retval, preval, mask; 608 struct tdfx_softc* tdfx_info = NULL; 609 610 611 if((piod == NULL) || (piod->device >= (tdfx_count & 612 0xf))) { 613 #ifdef DEBUG 614 printf("tdfx: Bad struct or device in tdfx_query_update\n"); 615 #endif 616 return -EINVAL; 617 } 618 619 tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 620 piod->device); 621 if(tdfx_info == NULL) return -ENXIO; 622 /* Code below this line in the fuction was taken from the 623 * Linux driver and converted for freebsd. */ 624 625 /* Check the size for all the ports, to make sure stuff doesn't get messed up 626 * by poorly written clients */ 627 628 switch(piod->port) { 629 case PCI_COMMAND_FREEBSD: 630 if(piod->size != 2) return -EINVAL; 631 break; 632 case SST1_PCI_SPECIAL1_FREEBSD: 633 if(piod->size != 4) return -EINVAL; 634 break; 635 case SST1_PCI_SPECIAL2_FREEBSD: 636 if(piod->size != 4) return -EINVAL; 637 break; 638 case SST1_PCI_SPECIAL3_FREEBSD: 639 if(piod->size != 4) return -EINVAL; 640 break; 641 case SST1_PCI_SPECIAL4_FREEBSD: 642 if(piod->size != 4) return -EINVAL; 643 break; 644 default: 645 return -EINVAL; 646 } 647 /* Read the current value */ 648 retval = pci_read_config(tdfx_info->dev, piod->port & ~3, 4); 649 650 /* These set up a mask to use, since apparently they wanted to write 4 bytes 651 * at once to the ports */ 652 switch (piod->size) { 653 case 1: 654 copyin(piod->value, &ret_byte, 1); 655 preval = ret_byte << (8 * (piod->port & 0x3)); 656 mask = 0xff << (8 * (piod->port & 0x3)); 657 break; 658 case 2: 659 copyin(piod->value, &ret_word, 2); 660 preval = ret_word << (8 * (piod->port & 0x3)); 661 mask = 0xffff << (8 * (piod->port & 0x3)); 662 break; 663 case 4: 664 copyin(piod->value, &ret_dword, 4); 665 preval = ret_dword; 666 mask = ~0; 667 break; 668 default: 669 return -EINVAL; 670 } 671 /* Finally, combine the values and write it to the port */ 672 retval = (retval & ~mask) | preval; 673 pci_write_config(tdfx_info->dev, piod->port & ~3, retval, 4); 674 675 return 0; 676 } 677 678 /* For both of these, I added a variable named workport of type u_int so 679 * that I could eliminate the warning about my data type size. The 680 * applications expect the port to be of type short, so I needed to change 681 * this within the function */ 682 static int 683 tdfx_do_pio_rd(struct tdfx_pio_data *piod) 684 { 685 /* Return val */ 686 u_int8_t ret_byte; 687 u_int workport; 688 struct tdfx_softc *tdfx_info = 689 (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, piod->device); 690 691 /* Restricts the access of ports other than those we use */ 692 if(((piod->port != VGA_INPUT_STATUS_1C) || (piod->port != SC_INDEX) || 693 (piod->port != SC_DATA) || (piod->port != VGA_MISC_OUTPUT_READ)) && 694 (piod->port < tdfx_info->pio0) && (piod->port > tdfx_info->pio0max)) 695 return -EPERM; 696 697 /* All VGA STATUS REGS are byte registers, size should never be > 1 */ 698 if(piod->size != 1) { 699 return -EINVAL; 700 } 701 702 /* Write the data to the intended port */ 703 workport = piod->port; 704 ret_byte = inb(workport); 705 copyout(&ret_byte, piod->value, sizeof(u_int8_t)); 706 return 0; 707 } 708 709 static int 710 tdfx_do_pio_wt(struct tdfx_pio_data *piod) 711 { 712 /* return val */ 713 u_int8_t ret_byte; 714 u_int workport; 715 struct tdfx_softc *tdfx_info = (struct 716 tdfx_softc*)devclass_get_softc(tdfx_devclass, piod->device); 717 /* Replace old switch w/ massive if(...) */ 718 /* Restricts the access of ports other than those we use */ 719 if(((piod->port != SC_INDEX) && (piod->port != SC_DATA) && 720 (piod->port != VGA_MISC_OUTPUT_READ)) /* Can't write VGA_ST_1C */ && 721 (piod->port < tdfx_info->pio0) && (piod->port > tdfx_info->pio0max)) 722 return -EPERM; 723 724 /* All VGA STATUS REGS are byte registers, size should never be > 1 */ 725 if(piod->size != 1) { 726 return -EINVAL; 727 } 728 729 /* Write the data to the intended port */ 730 copyin(piod->value, &ret_byte, sizeof(u_int8_t)); 731 workport = piod->port; 732 outb(workport, ret_byte); 733 return 0; 734 } 735 736 static int 737 tdfx_do_query(u_int cmd, struct tdfx_pio_data *piod) 738 { 739 /* There are three sub-commands to the query 0x33 */ 740 switch(_IOC_NR(cmd)) { 741 case 2: 742 return tdfx_query_boards(); 743 break; 744 case 3: 745 return tdfx_query_fetch(cmd, piod); 746 break; 747 case 4: 748 return tdfx_query_update(cmd, piod); 749 break; 750 default: 751 /* In case we are thrown a bogus sub-command! */ 752 #ifdef DEBUG 753 printf("Bad Sub-cmd: 0x%x\n", _IOC_NR(cmd)); 754 #endif 755 return -EINVAL; 756 } 757 } 758 759 static int 760 tdfx_do_pio(u_int cmd, struct tdfx_pio_data *piod) 761 { 762 /* Two types of PIO, INPUT and OUTPUT, as the name suggests */ 763 switch(_IOC_DIR(cmd)) { 764 case IOCV_OUT: 765 return tdfx_do_pio_rd(piod); 766 break; 767 case IOCV_IN: 768 return tdfx_do_pio_wt(piod); 769 break; 770 default: 771 return -EINVAL; 772 } 773 } 774 775 /* Calls to ioctl(2) eventually end up here. Unhandled ioctls return an ENXIO, 776 * normally, you would read in the data pointed to by data, then write your 777 * output to it. The ioctl *should* normally return zero if everything is 778 * alright, but 3dfx didn't make it that way... 779 * 780 * For all of the ioctl code, in the event of a real error, 781 * we return -Exxxx rather than simply Exxxx. The reason for this 782 * is that the ioctls actually RET information back to the program 783 * sometimes, rather than filling it in the passed structure. We 784 * want to distinguish errors from useful data, and maintain compatibility. 785 * 786 * There is this portion of the proc struct called p_retval[], we can store a 787 * return value in td->td_retval[0] and place the return value if it is positive 788 * in there, then we can return 0 (good). If the return value is negative, we 789 * can return -retval and the error should be properly handled. 790 */ 791 static int 792 tdfx_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 793 { 794 int retval = 0; 795 struct tdfx_pio_data *piod = (struct tdfx_pio_data*)data; 796 #ifdef DEBUG 797 printf("IOCTL'd by #%d, cmd: 0x%x, data: %p\n", td->td_proc->p_pid, (u_int32_t)cmd, 798 piod); 799 #endif 800 switch(_IOC_TYPE(cmd)) { 801 /* Return the real error if negative, or simply stick the valid return 802 * in td->td_retval */ 803 case 0x33: 804 /* The '3'(0x33) type IOCTL is for querying the installed cards */ 805 if((retval = tdfx_do_query(cmd, piod)) > 0) td->td_retval[0] = retval; 806 else return -retval; 807 break; 808 case 0: 809 /* The 0 type IOCTL is for programmed I/O methods */ 810 if((tdfx_do_pio(cmd, piod)) > 0) td->td_retval[0] = retval; 811 else return -retval; 812 break; 813 default: 814 /* Technically, we won't reach this from linux emu, but when glide 815 * finally gets ported, watch out! */ 816 #ifdef DEBUG 817 printf("Bad IOCTL from #%d\n", td->td_proc->p_pid); 818 #endif 819 return ENXIO; 820 } 821 822 return 0; 823 } 824 825 #ifdef TDFX_LINUX 826 /* 827 * Linux emulation IOCTL for /dev/tdfx 828 */ 829 static int 830 linux_ioctl_tdfx(struct thread *td, struct linux_ioctl_args* args) 831 { 832 int error = 0; 833 u_long cmd = args->cmd & 0xffff; 834 835 /* The structure passed to ioctl has two shorts, one int 836 and one void*. */ 837 char d_pio[2*sizeof(short) + sizeof(int) + sizeof(void*)]; 838 839 struct file *fp; 840 841 if ((error = fget(td, args->fd, &fp)) != 0) 842 return (error); 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, td->td_ucred, td); 846 fdrop(fp, td); 847 return error; 848 } 849 #endif /* TDFX_LINUX */ 850 851 852 /* This is the device driver struct. This is sent to the driver subsystem to 853 * register the method structure and the info strcut space for this particular 854 * instance of the driver. 855 */ 856 static driver_t tdfx_driver = { 857 "tdfx", 858 tdfx_methods, 859 sizeof(struct tdfx_softc), 860 }; 861 862 /* Tell Mr. Kernel about us! */ 863 DRIVER_MODULE(tdfx, pci, tdfx_driver, tdfx_devclass, 0, 0);
Cache object: 50e28184b212660e8a12e5d2fc4f0536
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