2 * Copyright (c) 2000 Doug Rabson
3 * Copyright (c) 2000 Ruslan Ermilov
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/pci/agp_i810.c,v 1.1.2.5 2002/09/15 08:45:41 anholt Exp $
31 * Fixes for 830/845G support: David Dawes <dawes@xfree86.org>
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/malloc.h>
40 #include <sys/kernel.h>
44 #include <pci/pcivar.h>
45 #include <pci/pcireg.h>
46 #include <pci/agppriv.h>
47 #include <pci/agpreg.h>
50 #include <vm/vm_object.h>
51 #include <vm/vm_page.h>
52 #include <vm/vm_pageout.h>
55 #include <machine/bus.h>
56 #include <machine/resource.h>
59 MALLOC_DECLARE(M_AGP);
61 #define READ1(off) bus_space_read_1(sc->bst, sc->bsh, off)
62 #define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off)
63 #define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v)
65 #define CHIP_I810 0 /* i810/i815 */
66 #define CHIP_I830 1 /* i830/i845 */
68 struct agp_i810_softc {
70 u_int32_t initial_aperture; /* aperture size at startup */
71 struct agp_gatt *gatt;
72 int chiptype; /* i810-like or i830 */
73 u_int32_t dcache_size; /* i810 only */
74 u_int32_t stolen; /* number of i830/845 gtt entries for stolen memory */
75 device_t bdev; /* bridge device */
76 struct resource *regs; /* memory mapped GC registers */
77 bus_space_tag_t bst; /* bus_space tag */
78 bus_space_handle_t bsh; /* bus_space handle */
82 agp_i810_match(device_t dev)
84 if (pci_get_class(dev) != PCIC_DISPLAY
85 || pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
88 switch (pci_get_devid(dev)) {
90 return ("Intel 82810 (i810 GMCH) SVGA controller");
93 return ("Intel 82810-DC100 (i810-DC100 GMCH) SVGA controller");
96 return ("Intel 82810E (i810E GMCH) SVGA controller");
99 return ("Intel 82815 (i815 GMCH) SVGA controller");
102 return ("Intel 82830 (i830M GMCH) SVGA controller");
105 return ("Intel 82845 (i845 GMCH) SVGA controller");
112 * Find bridge device.
115 agp_i810_find_bridge(device_t dev)
117 device_t *children, child;
122 * Calculate bridge device's ID.
124 devid = pci_get_devid(dev);
138 if (device_get_children(device_get_parent(dev), &children, &nchildren))
141 for (i = 0; i < nchildren; i++) {
144 if (pci_get_devid(child) == devid) {
145 free(children, M_TEMP);
149 free(children, M_TEMP);
154 agp_i810_probe(device_t dev)
158 desc = agp_i810_match(dev);
162 int devid = pci_get_devid(dev);
164 bdev = agp_i810_find_bridge(dev);
167 printf("I810: can't find bridge device\n");
172 * checking whether internal graphics device has been activated.
174 if ( (devid != 0x35778086 ) &&
175 (devid != 0x25628086 ) ) {
176 smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
177 if ((smram & AGP_I810_SMRAM_GMS)
178 == AGP_I810_SMRAM_GMS_DISABLED) {
180 printf("I810: disabled, not probing\n");
183 } else { /* I830MG */
185 gcc1 = pci_read_config(bdev, AGP_I830_GCC1, 1);
186 if ((gcc1 & AGP_I830_GCC1_DEV2) == AGP_I830_GCC1_DEV2_DISABLED) {
188 printf("I830: disabled, not probing\n");
194 device_set_desc(dev, desc);
202 agp_i810_attach(device_t dev)
204 struct agp_i810_softc *sc = device_get_softc(dev);
205 struct agp_gatt *gatt;
208 sc->bdev = agp_i810_find_bridge(dev);
212 error = agp_generic_attach(dev);
216 switch (pci_get_devid(dev)) {
221 sc->chiptype = CHIP_I810;
225 sc->chiptype = CHIP_I830;
229 /* Same for i810 and i830 */
230 rid = AGP_I810_MMADR;
231 sc->regs = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
232 0, ~0, 1, RF_ACTIVE);
234 agp_generic_detach(dev);
237 sc->bst = rman_get_bustag(sc->regs);
238 sc->bsh = rman_get_bushandle(sc->regs);
240 sc->initial_aperture = AGP_GET_APERTURE(dev);
242 gatt = malloc( sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
244 agp_generic_detach(dev);
249 gatt->ag_entries = AGP_GET_APERTURE(dev) >> AGP_PAGE_SHIFT;
251 if ( sc->chiptype == CHIP_I810 ) {
252 /* Some i810s have on-chip memory called dcache */
253 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
254 sc->dcache_size = 4 * 1024 * 1024;
258 /* According to the specs the gatt on the i810 must be 64k */
259 gatt->ag_virtual = contigmalloc( 64 * 1024, M_AGP, 0,
260 0, ~0, PAGE_SIZE, 0);
261 if (!gatt->ag_virtual) {
263 device_printf(dev, "contiguous allocation failed\n");
265 agp_generic_detach(dev);
268 bzero(gatt->ag_virtual, gatt->ag_entries * sizeof(u_int32_t));
270 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
272 /* Install the GATT. */
273 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1);
275 /* The i830 automatically initializes the 128k gatt on boot. */
276 unsigned int gcc1, pgtblctl;
278 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 1);
279 switch (gcc1 & AGP_I830_GCC1_GMS) {
280 case AGP_I830_GCC1_GMS_STOLEN_512:
281 sc->stolen = (512 - 132) * 1024 / 4096;
283 case AGP_I830_GCC1_GMS_STOLEN_1024:
284 sc->stolen = (1024 - 132) * 1024 / 4096;
286 case AGP_I830_GCC1_GMS_STOLEN_8192:
287 sc->stolen = (8192 - 132) * 1024 / 4096;
291 device_printf(dev, "unknown memory configuration, disabling\n");
292 agp_generic_detach(dev);
296 device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
297 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
299 /* GATT address is already in there, make sure it's enabled */
300 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
302 device_printf(dev, "PGTBL_CTL is 0x%08x\n", pgtblctl);
305 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
307 gatt->ag_physical = pgtblctl & ~1;
311 * Make sure the chipset can see everything.
319 agp_i810_detach(device_t dev)
321 struct agp_i810_softc *sc = device_get_softc(dev);
324 error = agp_generic_detach(dev);
328 /* Clear the GATT base. */
329 if ( sc->chiptype == CHIP_I810 ) {
330 WRITE4(AGP_I810_PGTBL_CTL, 0);
332 unsigned int pgtblctl;
333 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
335 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
338 /* Put the aperture back the way it started. */
339 AGP_SET_APERTURE(dev, sc->initial_aperture);
341 if ( sc->chiptype == CHIP_I810 ) {
342 contigfree(sc->gatt->ag_virtual, 64 * 1024, M_AGP);
344 free(sc->gatt, M_AGP);
346 bus_release_resource(dev, SYS_RES_MEMORY,
347 AGP_I810_MMADR, sc->regs);
353 agp_i810_get_aperture(device_t dev)
355 struct agp_i810_softc *sc = device_get_softc(dev);
357 if ( sc->chiptype == CHIP_I810 ) {
359 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
360 if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
361 return 32 * 1024 * 1024;
363 return 64 * 1024 * 1024;
367 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
368 if ((gcc1 & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64)
369 return 64 * 1024 * 1024;
371 return 128 * 1024 * 1024;
376 agp_i810_set_aperture(device_t dev, u_int32_t aperture)
378 struct agp_i810_softc *sc = device_get_softc(dev);
381 if ( sc->chiptype == CHIP_I810 ) {
383 * Double check for sanity.
385 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
386 device_printf(dev, "bad aperture size %d\n", aperture);
390 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
391 miscc &= ~AGP_I810_MISCC_WINSIZE;
392 if (aperture == 32 * 1024 * 1024)
393 miscc |= AGP_I810_MISCC_WINSIZE_32;
395 miscc |= AGP_I810_MISCC_WINSIZE_64;
397 pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
401 if (aperture != 64 * 1024 * 1024 && aperture != 128 * 1024 * 1024) {
402 device_printf(dev, "bad aperture size %d\n", aperture);
405 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
406 gcc1 &= ~AGP_I830_GCC1_GMASIZE;
407 if (aperture == 64 * 1024 * 1024)
408 gcc1 |= AGP_I830_GCC1_GMASIZE_64;
410 gcc1 |= AGP_I830_GCC1_GMASIZE_128;
412 pci_write_config(sc->bdev, AGP_I830_GCC1, gcc1, 2);
419 agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
421 struct agp_i810_softc *sc = device_get_softc(dev);
423 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
424 device_printf(dev, "failed: offset is 0x%08x, shift is %d, entries is %d\n", offset, AGP_PAGE_SHIFT, sc->gatt->ag_entries);
428 if ( sc->chiptype == CHIP_I830 ) {
429 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
430 device_printf(dev, "trying to bind into stolen memory");
435 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
440 agp_i810_unbind_page(device_t dev, int offset)
442 struct agp_i810_softc *sc = device_get_softc(dev);
444 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
447 if ( sc->chiptype == CHIP_I830 ) {
448 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
449 device_printf(dev, "trying to unbind from stolen memory");
454 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, 0);
459 * Writing via memory mapped registers already flushes all TLBs.
462 agp_i810_flush_tlb(device_t dev)
467 agp_i810_enable(device_t dev, u_int32_t mode)
473 static struct agp_memory *
474 agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
476 struct agp_i810_softc *sc = device_get_softc(dev);
477 struct agp_memory *mem;
479 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
482 if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
487 * Mapping local DRAM into GATT.
489 if ( sc->chiptype == CHIP_I830 )
491 if (size != sc->dcache_size)
493 } else if (type == 2) {
495 * Bogus mapping of a single page for the hardware cursor.
497 if (size != AGP_PAGE_SIZE)
501 mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
502 mem->am_id = sc->agp.as_nextid++;
506 mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
507 atop(round_page(size)));
513 * Allocate and wire down the page now so that we can
514 * get its physical address.
517 m = vm_page_grab(mem->am_obj, 0, VM_ALLOC_ZERO|VM_ALLOC_RETRY);
518 if ((m->flags & PG_ZERO) == 0)
519 vm_page_zero_fill(m);
521 mem->am_physical = VM_PAGE_TO_PHYS(m);
524 mem->am_physical = 0;
528 mem->am_is_bound = 0;
529 TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
530 sc->agp.as_allocated += size;
536 agp_i810_free_memory(device_t dev, struct agp_memory *mem)
538 struct agp_i810_softc *sc = device_get_softc(dev);
540 if (mem->am_is_bound)
543 if (mem->am_type == 2) {
545 * Unwire the page which we wired in alloc_memory.
547 vm_page_t m = vm_page_lookup(mem->am_obj, 0);
548 vm_page_unwire(m, 0);
551 sc->agp.as_allocated -= mem->am_size;
552 TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
554 vm_object_deallocate(mem->am_obj);
560 agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
563 struct agp_i810_softc *sc = device_get_softc(dev);
566 if (mem->am_type != 1)
567 return agp_generic_bind_memory(dev, mem, offset);
569 if ( sc->chiptype == CHIP_I830 )
572 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
573 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4,
581 agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
583 struct agp_i810_softc *sc = device_get_softc(dev);
586 if (mem->am_type != 1)
587 return agp_generic_unbind_memory(dev, mem);
589 if ( sc->chiptype == CHIP_I830 )
592 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
593 WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
598 static device_method_t agp_i810_methods[] = {
599 /* Device interface */
600 DEVMETHOD(device_probe, agp_i810_probe),
601 DEVMETHOD(device_attach, agp_i810_attach),
602 DEVMETHOD(device_detach, agp_i810_detach),
603 DEVMETHOD(device_shutdown, bus_generic_shutdown),
604 DEVMETHOD(device_suspend, bus_generic_suspend),
605 DEVMETHOD(device_resume, bus_generic_resume),
608 DEVMETHOD(agp_get_aperture, agp_i810_get_aperture),
609 DEVMETHOD(agp_set_aperture, agp_i810_set_aperture),
610 DEVMETHOD(agp_bind_page, agp_i810_bind_page),
611 DEVMETHOD(agp_unbind_page, agp_i810_unbind_page),
612 DEVMETHOD(agp_flush_tlb, agp_i810_flush_tlb),
613 DEVMETHOD(agp_enable, agp_i810_enable),
614 DEVMETHOD(agp_alloc_memory, agp_i810_alloc_memory),
615 DEVMETHOD(agp_free_memory, agp_i810_free_memory),
616 DEVMETHOD(agp_bind_memory, agp_i810_bind_memory),
617 DEVMETHOD(agp_unbind_memory, agp_i810_unbind_memory),
622 static driver_t agp_i810_driver = {
625 sizeof(struct agp_i810_softc),
628 static devclass_t agp_devclass;
630 DRIVER_MODULE(agp_i810, pci, agp_i810_driver, agp_devclass, 0, 0);