| 1 | /*- |
| 2 | * Copyright (c) 2000 Doug Rabson |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 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. |
| 13 | * |
| 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 |
| 24 | * SUCH DAMAGE. |
| 25 | * |
| 26 | * $FreeBSD: src/sys/pci/agp_via.c,v 1.1.2.2 2001/10/04 09:53:04 ru Exp $ |
| 27 | * $DragonFly: src/sys/dev/agp/agp_via.c,v 1.4 2003/12/09 19:40:56 dillon Exp $ |
| 28 | */ |
| 29 | |
| 30 | #include "opt_bus.h" |
| 31 | #include "opt_pci.h" |
| 32 | |
| 33 | #include <sys/param.h> |
| 34 | #include <sys/systm.h> |
| 35 | #include <sys/malloc.h> |
| 36 | #include <sys/kernel.h> |
| 37 | #include <sys/bus.h> |
| 38 | #include <sys/lock.h> |
| 39 | |
| 40 | #include <bus/pci/pcivar.h> |
| 41 | #include <bus/pci/pcireg.h> |
| 42 | #include "agppriv.h" |
| 43 | #include "agpreg.h" |
| 44 | |
| 45 | #include <vm/vm.h> |
| 46 | #include <vm/vm_object.h> |
| 47 | #include <vm/pmap.h> |
| 48 | |
| 49 | struct agp_via_softc { |
| 50 | struct agp_softc agp; |
| 51 | u_int32_t initial_aperture; /* aperture size at startup */ |
| 52 | struct agp_gatt *gatt; |
| 53 | }; |
| 54 | |
| 55 | static const char* |
| 56 | agp_via_match(device_t dev) |
| 57 | { |
| 58 | if (pci_get_class(dev) != PCIC_BRIDGE |
| 59 | || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) |
| 60 | return NULL; |
| 61 | |
| 62 | if (agp_find_caps(dev) == 0) |
| 63 | return NULL; |
| 64 | |
| 65 | switch (pci_get_devid(dev)) { |
| 66 | case 0x03051106: |
| 67 | return ("VIA 82C8363 (Apollo KT133A) host to PCI bridge"); |
| 68 | case 0x05011106: |
| 69 | return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); |
| 70 | case 0x05971106: |
| 71 | return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); |
| 72 | case 0x05981106: |
| 73 | return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); |
| 74 | case 0x06051106: |
| 75 | return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); |
| 76 | case 0x06911106: |
| 77 | return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); |
| 78 | }; |
| 79 | |
| 80 | if (pci_get_vendor(dev) == 0x1106) |
| 81 | return ("VIA Generic host to PCI bridge"); |
| 82 | |
| 83 | return NULL; |
| 84 | } |
| 85 | |
| 86 | static int |
| 87 | agp_via_probe(device_t dev) |
| 88 | { |
| 89 | const char *desc; |
| 90 | |
| 91 | desc = agp_via_match(dev); |
| 92 | if (desc) { |
| 93 | device_verbose(dev); |
| 94 | device_set_desc(dev, desc); |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | return ENXIO; |
| 99 | } |
| 100 | |
| 101 | static int |
| 102 | agp_via_attach(device_t dev) |
| 103 | { |
| 104 | struct agp_via_softc *sc = device_get_softc(dev); |
| 105 | struct agp_gatt *gatt; |
| 106 | int error; |
| 107 | |
| 108 | error = agp_generic_attach(dev); |
| 109 | if (error) |
| 110 | return error; |
| 111 | |
| 112 | sc->initial_aperture = AGP_GET_APERTURE(dev); |
| 113 | if (sc->initial_aperture == 0) { |
| 114 | device_printf(dev, "bad initial aperture size, disabling\n"); |
| 115 | return ENXIO; |
| 116 | } |
| 117 | |
| 118 | for (;;) { |
| 119 | gatt = agp_alloc_gatt(dev); |
| 120 | if (gatt) |
| 121 | break; |
| 122 | |
| 123 | /* |
| 124 | * Probably contigmalloc failure. Try reducing the |
| 125 | * aperture so that the gatt size reduces. |
| 126 | */ |
| 127 | if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { |
| 128 | agp_generic_detach(dev); |
| 129 | return ENOMEM; |
| 130 | } |
| 131 | } |
| 132 | sc->gatt = gatt; |
| 133 | |
| 134 | /* Install the gatt. */ |
| 135 | pci_write_config(dev, AGP_VIA_ATTBASE, gatt->ag_physical | 3, 4); |
| 136 | |
| 137 | /* Enable the aperture. */ |
| 138 | pci_write_config(dev, AGP_VIA_GARTCTRL, 0x0f, 4); |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | static int |
| 144 | agp_via_detach(device_t dev) |
| 145 | { |
| 146 | struct agp_via_softc *sc = device_get_softc(dev); |
| 147 | int error; |
| 148 | |
| 149 | error = agp_generic_detach(dev); |
| 150 | if (error) |
| 151 | return error; |
| 152 | |
| 153 | pci_write_config(dev, AGP_VIA_GARTCTRL, 0, 4); |
| 154 | pci_write_config(dev, AGP_VIA_ATTBASE, 0, 4); |
| 155 | AGP_SET_APERTURE(dev, sc->initial_aperture); |
| 156 | agp_free_gatt(sc->gatt); |
| 157 | |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | static u_int32_t |
| 162 | agp_via_get_aperture(device_t dev) |
| 163 | { |
| 164 | u_int32_t apsize; |
| 165 | |
| 166 | apsize = pci_read_config(dev, AGP_VIA_APSIZE, 1) & 0x1f; |
| 167 | |
| 168 | /* |
| 169 | * The size is determined by the number of low bits of |
| 170 | * register APBASE which are forced to zero. The low 20 bits |
| 171 | * are always forced to zero and each zero bit in the apsize |
| 172 | * field just read forces the corresponding bit in the 27:20 |
| 173 | * to be zero. We calculate the aperture size accordingly. |
| 174 | */ |
| 175 | return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; |
| 176 | } |
| 177 | |
| 178 | static int |
| 179 | agp_via_set_aperture(device_t dev, u_int32_t aperture) |
| 180 | { |
| 181 | u_int32_t apsize; |
| 182 | |
| 183 | /* |
| 184 | * Reverse the magic from get_aperture. |
| 185 | */ |
| 186 | apsize = ((aperture - 1) >> 20) ^ 0xff; |
| 187 | |
| 188 | /* |
| 189 | * Double check for sanity. |
| 190 | */ |
| 191 | if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) |
| 192 | return EINVAL; |
| 193 | |
| 194 | pci_write_config(dev, AGP_VIA_APSIZE, apsize, 1); |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | static int |
| 200 | agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) |
| 201 | { |
| 202 | struct agp_via_softc *sc = device_get_softc(dev); |
| 203 | |
| 204 | if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
| 205 | return EINVAL; |
| 206 | |
| 207 | sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | static int |
| 212 | agp_via_unbind_page(device_t dev, int offset) |
| 213 | { |
| 214 | struct agp_via_softc *sc = device_get_softc(dev); |
| 215 | |
| 216 | if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
| 217 | return EINVAL; |
| 218 | |
| 219 | sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static void |
| 224 | agp_via_flush_tlb(device_t dev) |
| 225 | { |
| 226 | pci_write_config(dev, AGP_VIA_GARTCTRL, 0x8f, 4); |
| 227 | pci_write_config(dev, AGP_VIA_GARTCTRL, 0x0f, 4); |
| 228 | } |
| 229 | |
| 230 | static device_method_t agp_via_methods[] = { |
| 231 | /* Device interface */ |
| 232 | DEVMETHOD(device_probe, agp_via_probe), |
| 233 | DEVMETHOD(device_attach, agp_via_attach), |
| 234 | DEVMETHOD(device_detach, agp_via_detach), |
| 235 | DEVMETHOD(device_shutdown, bus_generic_shutdown), |
| 236 | DEVMETHOD(device_suspend, bus_generic_suspend), |
| 237 | DEVMETHOD(device_resume, bus_generic_resume), |
| 238 | |
| 239 | /* AGP interface */ |
| 240 | DEVMETHOD(agp_get_aperture, agp_via_get_aperture), |
| 241 | DEVMETHOD(agp_set_aperture, agp_via_set_aperture), |
| 242 | DEVMETHOD(agp_bind_page, agp_via_bind_page), |
| 243 | DEVMETHOD(agp_unbind_page, agp_via_unbind_page), |
| 244 | DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), |
| 245 | DEVMETHOD(agp_enable, agp_generic_enable), |
| 246 | DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), |
| 247 | DEVMETHOD(agp_free_memory, agp_generic_free_memory), |
| 248 | DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), |
| 249 | DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), |
| 250 | |
| 251 | { 0, 0 } |
| 252 | }; |
| 253 | |
| 254 | static driver_t agp_via_driver = { |
| 255 | "agp", |
| 256 | agp_via_methods, |
| 257 | sizeof(struct agp_via_softc), |
| 258 | }; |
| 259 | |
| 260 | static devclass_t agp_devclass; |
| 261 | |
| 262 | DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0); |
| 263 | MODULE_DEPEND(agp_via, agp, 1, 1, 1); |
| 264 | MODULE_DEPEND(agp_via, pci, 1, 1, 1); |