112};
113
114static int
115tdfx_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
144static int
145tdfx_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_MAPS;
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
270static int
271tdfx_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
304static int
305tdfx_shutdown(device_t dev) {
306#ifdef DEBUG
307 device_printf(dev, "tdfx: Device Shutdown\n");
308#endif
309 return 0;
310}
311
312static int
313tdfx_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
325static int
326tdfx_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
401static int
402tdfx_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
419static int
420tdfx_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
436static int
437tdfx_mmap(dev_t dev, vm_offset_t offset, vm_offset_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
497static int
498tdfx_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
506static int
507tdfx_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
598static int
599tdfx_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 */
683static int
684tdfx_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
710static int
711tdfx_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
737static int
738tdfx_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
760static int
761tdfx_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 */
792static int
793tdfx_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 */
830static int
831linux_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 */
857static driver_t tdfx_driver = {
858 "tdfx",
859 tdfx_methods,
860 sizeof(struct tdfx_softc),
861};
862
863/* Tell Mr. Kernel about us! */
864DRIVER_MODULE(tdfx, pci, tdfx_driver, tdfx_devclass, 0, 0);
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