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 $
27 * $DragonFly: src/sys/dev/agp/agp_via.c,v 1.8 2008/01/07 01:34:58 corecode Exp $
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
39 #include <bus/pci/pcivar.h>
40 #include <bus/pci/pcireg.h>
45 #include <vm/vm_object.h>
48 #define REG_GARTCTRL 0
52 struct agp_via_softc
{
54 u_int32_t initial_aperture
; /* aperture size at startup */
55 struct agp_gatt
*gatt
;
59 static int via_v2_regs
[] = { AGP_VIA_GARTCTRL
, AGP_VIA_APSIZE
,
61 static int via_v3_regs
[] = { AGP3_VIA_GARTCTRL
, AGP3_VIA_APSIZE
,
65 agp_via_match(device_t dev
)
67 if (pci_get_class(dev
) != PCIC_BRIDGE
68 || pci_get_subclass(dev
) != PCIS_BRIDGE_HOST
)
71 if (agp_find_caps(dev
) == 0)
74 switch (pci_get_devid(dev
)) {
76 return ("VIA 8763 (P4X600) host to PCI bridge");
78 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge");
80 return ("VIA KT880 host to PCI bridge");
82 return ("VIA 3296 (P4M800) host to PCI bridge");
84 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge");
86 return ("VIA 8371 (Apollo KX133) host to PCI bridge");
88 return ("VIA 8501 (Apollo MVP4) host to PCI bridge");
90 return ("VIA 82C597 (Apollo VP3) host to PCI bridge");
92 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge");
94 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge");
96 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge");
98 return ("VIA 82C691 (Apollo Pro) host to PCI bridge");
100 return ("VIA 8633 (Pro 266) host to PCI bridge");
102 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge");
104 return ("VIA 8653 (Pro266T) host to PCI bridge");
106 return ("VIA 8361 (KLE133) host to PCI bridge");
108 return ("VIA XM266 (PM266/KM266) host to PCI bridge");
110 return ("VIA 862x (CLE266) host to PCI bridge");
112 return ("VIA 8753 (P4X266) host to PCI bridge");
114 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge");
116 return ("VIA XN266 (Apollo Pro266) host to PCI bridge");
118 return ("VIA 8754 (PT800) host to PCI bridge");
120 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge");
122 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge");
124 return ("VIA 8783 (PT890) host to PCI bridge");
126 return ("VIA PT880 host to PCI bridge");
128 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge");
135 agp_via_probe(device_t dev
)
139 if (resource_disabled("agp", device_get_unit(dev
)))
141 desc
= agp_via_match(dev
);
144 device_set_desc(dev
, desc
);
145 return BUS_PROBE_DEFAULT
;
152 agp_via_attach(device_t dev
)
154 struct agp_via_softc
*sc
= device_get_softc(dev
);
155 struct agp_gatt
*gatt
;
159 /* XXX: This should be keying off of whether the bridge is AGP3 capable,
160 * rather than a bunch of device ids for chipsets that happen to do 8x.
162 switch (pci_get_devid(dev
)) {
173 /* The newer VIA chipsets will select the AGP version based on
174 * what AGP versions the card supports. We still have to
175 * program it using the v2 registers if it has chosen to use
176 * compatibility mode.
178 agpsel
= pci_read_config(dev
, AGP_VIA_AGPSEL
, 1);
179 if ((agpsel
& (1 << 1)) == 0)
180 sc
->regs
= via_v3_regs
;
182 sc
->regs
= via_v2_regs
;
185 sc
->regs
= via_v2_regs
;
189 error
= agp_generic_attach(dev
);
193 sc
->initial_aperture
= AGP_GET_APERTURE(dev
);
194 if (sc
->initial_aperture
== 0) {
195 device_printf(dev
, "bad initial aperture size, disabling\n");
200 gatt
= agp_alloc_gatt(dev
);
205 * Probably contigmalloc failure. Try reducing the
206 * aperture so that the gatt size reduces.
208 if (AGP_SET_APERTURE(dev
, AGP_GET_APERTURE(dev
) / 2)) {
209 agp_generic_detach(dev
);
215 if (sc
->regs
== via_v2_regs
) {
216 /* Install the gatt. */
217 pci_write_config(dev
, sc
->regs
[REG_ATTBASE
], gatt
->ag_physical
| 3, 4);
219 /* Enable the aperture. */
220 pci_write_config(dev
, sc
->regs
[REG_GARTCTRL
], 0x0f, 4);
224 /* Install the gatt. */
225 pci_write_config(dev
, sc
->regs
[REG_ATTBASE
], gatt
->ag_physical
, 4);
227 /* Enable the aperture. */
228 gartctrl
= pci_read_config(dev
, sc
->regs
[REG_ATTBASE
], 4);
229 pci_write_config(dev
, sc
->regs
[REG_GARTCTRL
], gartctrl
| (3 << 7), 4);
236 agp_via_detach(device_t dev
)
238 struct agp_via_softc
*sc
= device_get_softc(dev
);
242 pci_write_config(dev
, sc
->regs
[REG_GARTCTRL
], 0, 4);
243 pci_write_config(dev
, sc
->regs
[REG_ATTBASE
], 0, 4);
244 AGP_SET_APERTURE(dev
, sc
->initial_aperture
);
245 agp_free_gatt(sc
->gatt
);
252 agp_via_get_aperture(device_t dev
)
254 struct agp_via_softc
*sc
= device_get_softc(dev
);
257 apsize
= pci_read_config(dev
, sc
->regs
[REG_APSIZE
], 1) & 0x1f;
260 * The size is determined by the number of low bits of
261 * register APBASE which are forced to zero. The low 20 bits
262 * are always forced to zero and each zero bit in the apsize
263 * field just read forces the corresponding bit in the 27:20
264 * to be zero. We calculate the aperture size accordingly.
266 return (((apsize
^ 0xff) << 20) | ((1 << 20) - 1)) + 1;
270 agp_via_set_aperture(device_t dev
, u_int32_t aperture
)
272 struct agp_via_softc
*sc
= device_get_softc(dev
);
276 * Reverse the magic from get_aperture.
278 apsize
= ((aperture
- 1) >> 20) ^ 0xff;
281 * Double check for sanity.
283 if ((((apsize
^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture
)
286 pci_write_config(dev
, sc
->regs
[REG_APSIZE
], apsize
, 1);
292 agp_via_bind_page(device_t dev
, int offset
, vm_offset_t physical
)
294 struct agp_via_softc
*sc
= device_get_softc(dev
);
296 if (offset
< 0 || offset
>= (sc
->gatt
->ag_entries
<< AGP_PAGE_SHIFT
))
299 sc
->gatt
->ag_virtual
[offset
>> AGP_PAGE_SHIFT
] = physical
;
304 agp_via_unbind_page(device_t dev
, int offset
)
306 struct agp_via_softc
*sc
= device_get_softc(dev
);
308 if (offset
< 0 || offset
>= (sc
->gatt
->ag_entries
<< AGP_PAGE_SHIFT
))
311 sc
->gatt
->ag_virtual
[offset
>> AGP_PAGE_SHIFT
] = 0;
316 agp_via_flush_tlb(device_t dev
)
318 struct agp_via_softc
*sc
= device_get_softc(dev
);
321 if (sc
->regs
== via_v2_regs
) {
322 pci_write_config(dev
, sc
->regs
[REG_GARTCTRL
], 0x8f, 4);
323 pci_write_config(dev
, sc
->regs
[REG_GARTCTRL
], 0x0f, 4);
325 gartctrl
= pci_read_config(dev
, sc
->regs
[REG_GARTCTRL
], 4);
326 pci_write_config(dev
, sc
->regs
[REG_GARTCTRL
], gartctrl
&
328 pci_write_config(dev
, sc
->regs
[REG_GARTCTRL
], gartctrl
, 4);
333 static device_method_t agp_via_methods
[] = {
334 /* Device interface */
335 DEVMETHOD(device_probe
, agp_via_probe
),
336 DEVMETHOD(device_attach
, agp_via_attach
),
337 DEVMETHOD(device_detach
, agp_via_detach
),
338 DEVMETHOD(device_shutdown
, bus_generic_shutdown
),
339 DEVMETHOD(device_suspend
, bus_generic_suspend
),
340 DEVMETHOD(device_resume
, bus_generic_resume
),
343 DEVMETHOD(agp_get_aperture
, agp_via_get_aperture
),
344 DEVMETHOD(agp_set_aperture
, agp_via_set_aperture
),
345 DEVMETHOD(agp_bind_page
, agp_via_bind_page
),
346 DEVMETHOD(agp_unbind_page
, agp_via_unbind_page
),
347 DEVMETHOD(agp_flush_tlb
, agp_via_flush_tlb
),
348 DEVMETHOD(agp_enable
, agp_generic_enable
),
349 DEVMETHOD(agp_alloc_memory
, agp_generic_alloc_memory
),
350 DEVMETHOD(agp_free_memory
, agp_generic_free_memory
),
351 DEVMETHOD(agp_bind_memory
, agp_generic_bind_memory
),
352 DEVMETHOD(agp_unbind_memory
, agp_generic_unbind_memory
),
357 static driver_t agp_via_driver
= {
360 sizeof(struct agp_via_softc
),
363 static devclass_t agp_devclass
;
365 DRIVER_MODULE(agp_via
, pci
, agp_via_driver
, agp_devclass
, 0, 0);
366 MODULE_DEPEND(agp_via
, agp
, 1, 1, 1);
367 MODULE_DEPEND(agp_via
, pci
, 1, 1, 1);