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_ali.c,v 1.20 2007/11/12 21:51:36 jhb Exp $
27 * $DragonFly: src/sys/dev/agp/agp_ali.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 struct agp_ali_softc
{
50 u_int32_t initial_aperture
; /* aperture size at startup */
51 struct agp_gatt
*gatt
;
55 agp_ali_match(device_t dev
)
57 if (pci_get_class(dev
) != PCIC_BRIDGE
58 || pci_get_subclass(dev
) != PCIS_BRIDGE_HOST
)
61 if (agp_find_caps(dev
) == 0)
64 switch (pci_get_devid(dev
)) {
66 return ("Ali M1671 host to AGP bridge");
68 return ("Ali M1541 host to AGP bridge");
70 return ("Ali M1621 host to AGP bridge");
77 agp_ali_probe(device_t dev
)
81 if (resource_disabled("agp", device_get_unit(dev
)))
83 desc
= agp_ali_match(dev
);
86 device_set_desc(dev
, desc
);
87 return BUS_PROBE_DEFAULT
;
94 agp_ali_attach(device_t dev
)
96 struct agp_ali_softc
*sc
= device_get_softc(dev
);
97 struct agp_gatt
*gatt
;
101 error
= agp_generic_attach(dev
);
105 sc
->initial_aperture
= AGP_GET_APERTURE(dev
);
106 if (sc
->initial_aperture
== 0) {
107 device_printf(dev
, "bad initial aperture size, disabling\n");
108 agp_generic_detach(dev
);
113 gatt
= agp_alloc_gatt(dev
);
118 * Probably contigmalloc failure. Try reducing the
119 * aperture so that the gatt size reduces.
121 if (AGP_SET_APERTURE(dev
, AGP_GET_APERTURE(dev
) / 2)) {
122 agp_generic_detach(dev
);
128 /* Install the gatt. */
129 attbase
= pci_read_config(dev
, AGP_ALI_ATTBASE
, 4);
130 pci_write_config(dev
, AGP_ALI_ATTBASE
, gatt
->ag_physical
|
131 (attbase
& 0xfff), 4);
133 /* Enable the TLB. */
134 pci_write_config(dev
, AGP_ALI_TLBCTRL
, 0x10, 1);
140 agp_ali_detach(device_t dev
)
142 struct agp_ali_softc
*sc
= device_get_softc(dev
);
147 /* Disable the TLB.. */
148 pci_write_config(dev
, AGP_ALI_TLBCTRL
, 0x90, 1);
150 /* Put the aperture back the way it started. */
151 AGP_SET_APERTURE(dev
, sc
->initial_aperture
);
152 attbase
= pci_read_config(dev
, AGP_ALI_ATTBASE
, 4);
153 pci_write_config(dev
, AGP_ALI_ATTBASE
, attbase
& 0xfff, 4);
155 agp_free_gatt(sc
->gatt
);
162 static u_int32_t agp_ali_table
[] = {
166 4*M
, /* 3 - invalid */
167 8*M
, /* 4 - invalid */
169 16*M
, /* 6 - invalid */
170 32*M
, /* 7 - invalid */
171 64*M
, /* 8 - invalid */
172 128*M
, /* 9 - invalid */
173 256*M
, /* 10 - invalid */
175 #define agp_ali_table_size (sizeof(agp_ali_table) / sizeof(agp_ali_table[0]))
178 agp_ali_get_aperture(device_t dev
)
181 * The aperture size is derived from the low bits of attbase.
182 * I'm not sure this is correct..
184 int i
= pci_read_config(dev
, AGP_ALI_ATTBASE
, 4) & 0xf;
185 if (i
>= agp_ali_table_size
)
187 return agp_ali_table
[i
];
191 agp_ali_set_aperture(device_t dev
, u_int32_t aperture
)
196 for (i
= 0; i
< agp_ali_table_size
; i
++)
197 if (agp_ali_table
[i
] == aperture
)
199 if (i
== agp_ali_table_size
)
202 attbase
= pci_read_config(dev
, AGP_ALI_ATTBASE
, 4);
203 pci_write_config(dev
, AGP_ALI_ATTBASE
, (attbase
& ~0xf) | i
, 4);
208 agp_ali_bind_page(device_t dev
, int offset
, vm_offset_t physical
)
210 struct agp_ali_softc
*sc
= device_get_softc(dev
);
212 if (offset
< 0 || offset
>= (sc
->gatt
->ag_entries
<< AGP_PAGE_SHIFT
))
215 sc
->gatt
->ag_virtual
[offset
>> AGP_PAGE_SHIFT
] = physical
;
220 agp_ali_unbind_page(device_t dev
, int offset
)
222 struct agp_ali_softc
*sc
= device_get_softc(dev
);
224 if (offset
< 0 || offset
>= (sc
->gatt
->ag_entries
<< AGP_PAGE_SHIFT
))
227 sc
->gatt
->ag_virtual
[offset
>> AGP_PAGE_SHIFT
] = 0;
232 agp_ali_flush_tlb(device_t dev
)
234 pci_write_config(dev
, AGP_ALI_TLBCTRL
, 0x90, 1);
235 pci_write_config(dev
, AGP_ALI_TLBCTRL
, 0x10, 1);
238 static device_method_t agp_ali_methods
[] = {
239 /* Device interface */
240 DEVMETHOD(device_probe
, agp_ali_probe
),
241 DEVMETHOD(device_attach
, agp_ali_attach
),
242 DEVMETHOD(device_detach
, agp_ali_detach
),
243 DEVMETHOD(device_shutdown
, bus_generic_shutdown
),
244 DEVMETHOD(device_suspend
, bus_generic_suspend
),
245 DEVMETHOD(device_resume
, bus_generic_resume
),
248 DEVMETHOD(agp_get_aperture
, agp_ali_get_aperture
),
249 DEVMETHOD(agp_set_aperture
, agp_ali_set_aperture
),
250 DEVMETHOD(agp_bind_page
, agp_ali_bind_page
),
251 DEVMETHOD(agp_unbind_page
, agp_ali_unbind_page
),
252 DEVMETHOD(agp_flush_tlb
, agp_ali_flush_tlb
),
253 DEVMETHOD(agp_enable
, agp_generic_enable
),
254 DEVMETHOD(agp_alloc_memory
, agp_generic_alloc_memory
),
255 DEVMETHOD(agp_free_memory
, agp_generic_free_memory
),
256 DEVMETHOD(agp_bind_memory
, agp_generic_bind_memory
),
257 DEVMETHOD(agp_unbind_memory
, agp_generic_unbind_memory
),
262 static driver_t agp_ali_driver
= {
265 sizeof(struct agp_ali_softc
),
268 static devclass_t agp_devclass
;
270 DRIVER_MODULE(agp_ali
, pci
, agp_ali_driver
, agp_devclass
, 0, 0);
271 MODULE_DEPEND(agp_ali
, agp
, 1, 1, 1);
272 MODULE_DEPEND(agp_ali
, pci
, 1, 1, 1);