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
26 * $FreeBSD: src/sys/dev/agp/agp_via.c,v 1.26 2007/11/12 21:51:37 jhb Exp $
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/malloc.h>
34 #include <sys/kernel.h>
38 #include <bus/pci/pcivar.h>
39 #include <bus/pci/pcireg.h>
44 #include <vm/vm_object.h>
47 #define REG_GARTCTRL 0
51 struct agp_via_softc {
53 u_int32_t initial_aperture; /* aperture size at startup */
54 struct agp_gatt *gatt;
58 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE,
60 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE,
64 agp_via_match(device_t dev)
66 if (pci_get_class(dev) != PCIC_BRIDGE
67 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
70 if (agp_find_caps(dev) == 0)
73 switch (pci_get_devid(dev)) {
75 return ("VIA 8763 (P4X600) host to PCI bridge");
77 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge");
79 return ("VIA KT880 host to PCI bridge");
81 return ("VIA 3296 (P4M800) host to PCI bridge");
83 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge");
85 return ("VIA 8371 (Apollo KX133) host to PCI bridge");
87 return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
89 return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
91 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
93 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge");
95 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge");
97 return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
99 return ("VIA 8633 (Pro 266) host to PCI bridge");
101 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge");
103 return ("VIA 8653 (Pro266T) host to PCI bridge");
105 return ("VIA 8361 (KLE133) host to PCI bridge");
107 return ("VIA XM266 (PM266/KM266) host to PCI bridge");
109 return ("VIA 862x (CLE266) host to PCI bridge");
111 return ("VIA 8753 (P4X266) host to PCI bridge");
113 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge");
115 return ("VIA XN266 (Apollo Pro266) host to PCI bridge");
117 return ("VIA 8754 (PT800) host to PCI bridge");
119 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge");
121 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge");
123 return ("VIA 8783 (PT890) host to PCI bridge");
125 return ("VIA PT880 host to PCI bridge");
127 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge");
134 agp_via_probe(device_t dev)
138 if (resource_disabled("agp", device_get_unit(dev)))
140 desc = agp_via_match(dev);
143 device_set_desc(dev, desc);
144 return BUS_PROBE_DEFAULT;
151 agp_via_attach(device_t dev)
153 struct agp_via_softc *sc = device_get_softc(dev);
154 struct agp_gatt *gatt;
158 /* XXX: This should be keying off of whether the bridge is AGP3 capable,
159 * rather than a bunch of device ids for chipsets that happen to do 8x.
161 switch (pci_get_devid(dev)) {
172 /* The newer VIA chipsets will select the AGP version based on
173 * what AGP versions the card supports. We still have to
174 * program it using the v2 registers if it has chosen to use
175 * compatibility mode.
177 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1);
178 if ((agpsel & (1 << 1)) == 0)
179 sc->regs = via_v3_regs;
181 sc->regs = via_v2_regs;
184 sc->regs = via_v2_regs;
188 error = agp_generic_attach(dev);
192 sc->initial_aperture = AGP_GET_APERTURE(dev);
193 if (sc->initial_aperture == 0) {
194 device_printf(dev, "bad initial aperture size, disabling\n");
199 gatt = agp_alloc_gatt(dev);
204 * Probably contigmalloc failure. Try reducing the
205 * aperture so that the gatt size reduces.
207 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
208 agp_generic_detach(dev);
214 if (sc->regs == via_v2_regs) {
215 /* Install the gatt. */
216 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4);
218 /* Enable the aperture. */
219 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
223 /* Install the gatt. */
224 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4);
226 /* Enable the aperture. */
227 gartctrl = pci_read_config(dev, sc->regs[REG_ATTBASE], 4);
228 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4);
235 agp_via_detach(device_t dev)
237 struct agp_via_softc *sc = device_get_softc(dev);
241 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4);
242 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4);
243 AGP_SET_APERTURE(dev, sc->initial_aperture);
244 agp_free_gatt(sc->gatt);
251 agp_via_get_aperture(device_t dev)
253 struct agp_via_softc *sc = device_get_softc(dev);
256 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f;
259 * The size is determined by the number of low bits of
260 * register APBASE which are forced to zero. The low 20 bits
261 * are always forced to zero and each zero bit in the apsize
262 * field just read forces the corresponding bit in the 27:20
263 * to be zero. We calculate the aperture size accordingly.
265 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
269 agp_via_set_aperture(device_t dev, u_int32_t aperture)
271 struct agp_via_softc *sc = device_get_softc(dev);
275 * Reverse the magic from get_aperture.
277 apsize = ((aperture - 1) >> 20) ^ 0xff;
280 * Double check for sanity.
282 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture)
285 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1);
291 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical)
293 struct agp_via_softc *sc = device_get_softc(dev);
295 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
298 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
303 agp_via_unbind_page(device_t dev, int offset)
305 struct agp_via_softc *sc = device_get_softc(dev);
307 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
310 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
315 agp_via_flush_tlb(device_t dev)
317 struct agp_via_softc *sc = device_get_softc(dev);
320 if (sc->regs == via_v2_regs) {
321 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4);
322 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4);
324 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4);
325 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl &
327 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4);
332 static device_method_t agp_via_methods[] = {
333 /* Device interface */
334 DEVMETHOD(device_probe, agp_via_probe),
335 DEVMETHOD(device_attach, agp_via_attach),
336 DEVMETHOD(device_detach, agp_via_detach),
337 DEVMETHOD(device_shutdown, bus_generic_shutdown),
338 DEVMETHOD(device_suspend, bus_generic_suspend),
339 DEVMETHOD(device_resume, bus_generic_resume),
342 DEVMETHOD(agp_get_aperture, agp_via_get_aperture),
343 DEVMETHOD(agp_set_aperture, agp_via_set_aperture),
344 DEVMETHOD(agp_bind_page, agp_via_bind_page),
345 DEVMETHOD(agp_unbind_page, agp_via_unbind_page),
346 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb),
347 DEVMETHOD(agp_enable, agp_generic_enable),
348 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
349 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
350 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
351 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
356 static driver_t agp_via_driver = {
359 sizeof(struct agp_via_softc),
362 static devclass_t agp_devclass;
364 DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, NULL, NULL);
365 MODULE_DEPEND(agp_via, agp, 1, 1, 1);
366 MODULE_DEPEND(agp_via, pci, 1, 1, 1);