2 * Copyright (c) 2000 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
39 #include <sys/mutex.h>
42 #include <dev/agp/agppriv.h>
43 #include <dev/agp/agpreg.h>
44 #include <dev/pci/pcivar.h>
45 #include <dev/pci/pcireg.h>
48 #include <vm/vm_object.h>
51 #define REG_GARTCTRL 0
55 struct agp_via_softc {
57 u_int32_t initial_aperture; /* aperture size at startup */
58 struct agp_gatt *gatt;
62 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE,
64 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE,
68 agp_via_match(device_t dev)
70 if (pci_get_class(dev) != PCIC_BRIDGE
71 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
74 if (agp_find_caps(dev) == 0)
77 switch (pci_get_devid(dev)) {
79 return ("VIA 8763 (P4X600) host to PCI bridge");
81 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge");
83 return ("VIA KT880 host to PCI bridge");
85 return ("VIA 3296 (P4M800) host to PCI bridge");
87 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge");
89 return ("VIA VT3324 (CX700) host to PCI bridge");
91 return ("VIA 8371 (Apollo KX133) host to PCI bridge");
93 return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
95 return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
97 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
99 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge");
101 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge");
103 return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
105 return ("VIA 8633 (Pro 266) host to PCI bridge");
107 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge");
109 return ("VIA 8653 (Pro266T) host to PCI bridge");
111 return ("VIA 8361 (KLE133) host to PCI bridge");
113 return ("VIA XM266 (PM266/KM266) host to PCI bridge");
115 return ("VIA 862x (CLE266) host to PCI bridge");
117 return ("VIA 8753 (P4X266) host to PCI bridge");
119 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge");
121 return ("VIA XN266 (Apollo Pro266) host to PCI bridge");
123 return ("VIA 8754 (PT800) host to PCI bridge");
125 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge");
127 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge");
129 return ("VIA 8783 (PT890) host to PCI bridge");
131 return ("VIA PT880 host to PCI bridge");
133 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge");
140 agp_via_probe(device_t dev)
144 if (resource_disabled("agp", device_get_unit(dev)))
146 desc = agp_via_match(dev);
148 device_set_desc(dev, desc);
149 return BUS_PROBE_DEFAULT;
156 agp_via_attach(device_t dev)
158 struct agp_via_softc *sc = device_get_softc(dev);
159 struct agp_gatt *gatt;
163 /* XXX: This should be keying off of whether the bridge is AGP3 capable,
164 * rather than a bunch of device ids for chipsets that happen to do 8x.
166 switch (pci_get_devid(dev)) {
178 /* The newer VIA chipsets will select the AGP version based on
179 * what AGP versions the card supports. We still have to
180 * program it using the v2 registers if it has chosen to use
181 * compatibility mode.
183 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1);
184 if ((agpsel & (1 << 1)) == 0)
185 sc->regs = via_v3_regs;
187 sc->regs = via_v2_regs;
190 sc->regs = via_v2_regs;
194 error = agp_generic_attach(dev);
198 sc->initial_aperture = AGP_GET_APERTURE(dev);
201 gatt = agp_alloc_gatt(dev);
206 * Probably contigmalloc failure. Try reducing the
207 * aperture so that the gatt size reduces.
209 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
210 agp_generic_detach(dev);
216 if (sc->regs == via_v2_regs) {
217 /* Install the gatt. */
218 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4);
220 /* Enable the aperture. */
221 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
225 /* Install the gatt. */
226 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4);
228 /* Enable the aperture. */
229 gartctrl = pci_read_config(dev, sc->regs[REG_ATTBASE], 4);
230 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4);
233 device_printf(dev, "aperture size is %dM\n",
234 sc->initial_aperture / 1024 / 1024);
240 agp_via_detach(device_t dev)
242 struct agp_via_softc *sc = device_get_softc(dev);
246 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4);
247 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4);
248 AGP_SET_APERTURE(dev, sc->initial_aperture);
249 agp_free_gatt(sc->gatt);
256 agp_via_get_aperture(device_t dev)
258 struct agp_via_softc *sc = device_get_softc(dev);
261 if (sc->regs == via_v2_regs) {
262 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f;
265 * The size is determined by the number of low bits of
266 * register APBASE which are forced to zero. The low 20 bits
267 * are always forced to zero and each zero bit in the apsize
268 * field just read forces the corresponding bit in the 27:20
269 * to be zero. We calculate the aperture size accordingly.
271 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
273 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 2) & 0xfff;
290 device_printf(dev, "Invalid aperture setting 0x%x",
291 pci_read_config(dev, sc->regs[REG_APSIZE], 2));
298 agp_via_set_aperture(device_t dev, u_int32_t aperture)
300 struct agp_via_softc *sc = device_get_softc(dev);
301 u_int32_t apsize, key, val;
303 if (sc->regs == via_v2_regs) {
305 * Reverse the magic from get_aperture.
307 apsize = ((aperture - 1) >> 20) ^ 0xff;
310 * Double check for sanity.
312 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
315 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1);
340 device_printf(dev, "Invalid aperture size (%dMb)\n",
341 aperture / 1024 / 1024);
344 val = pci_read_config(dev, sc->regs[REG_APSIZE], 2);
345 pci_write_config(dev, sc->regs[REG_APSIZE],
346 ((val & ~0xfff) | key), 2);
352 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical)
354 struct agp_via_softc *sc = device_get_softc(dev);
356 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
359 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
364 agp_via_unbind_page(device_t dev, int offset)
366 struct agp_via_softc *sc = device_get_softc(dev);
368 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
371 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
376 agp_via_flush_tlb(device_t dev)
378 struct agp_via_softc *sc = device_get_softc(dev);
381 if (sc->regs == via_v2_regs) {
382 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4);
383 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
385 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
386 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl &
388 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4);
393 static device_method_t agp_via_methods[] = {
394 /* Device interface */
395 DEVMETHOD(device_probe, agp_via_probe),
396 DEVMETHOD(device_attach, agp_via_attach),
397 DEVMETHOD(device_detach, agp_via_detach),
398 DEVMETHOD(device_shutdown, bus_generic_shutdown),
399 DEVMETHOD(device_suspend, bus_generic_suspend),
400 DEVMETHOD(device_resume, bus_generic_resume),
403 DEVMETHOD(agp_get_aperture, agp_via_get_aperture),
404 DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
405 DEVMETHOD(agp_bind_page, agp_via_bind_page),
406 DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
407 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb),
408 DEVMETHOD(agp_enable, agp_generic_enable),
409 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
410 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
411 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
412 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
417 static driver_t agp_via_driver = {
420 sizeof(struct agp_via_softc),
423 static devclass_t agp_devclass;
425 DRIVER_MODULE(agp_via, hostb, agp_via_driver, agp_devclass, 0, 0);
426 MODULE_DEPEND(agp_via, agp, 1, 1, 1);
427 MODULE_DEPEND(agp_via, pci, 1, 1, 1);