| 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 1.23 2005/12/20 21:12:26 jhb Exp $ |
| 27 | * $DragonFly: src/sys/dev/agp/agp_via.c,v 1.6 2007/09/12 08:31:43 hasso Exp $ |
| 28 | */ |
| 29 | |
| 30 | #include "opt_bus.h" |
| 31 | |
| 32 | #include <sys/param.h> |
| 33 | #include <sys/systm.h> |
| 34 | #include <sys/malloc.h> |
| 35 | #include <sys/kernel.h> |
| 36 | #include <sys/bus.h> |
| 37 | #include <sys/lock.h> |
| 38 | |
| 39 | #include <bus/pci/pcivar.h> |
| 40 | #include <bus/pci/pcireg.h> |
| 41 | #include "agppriv.h" |
| 42 | #include "agpreg.h" |
| 43 | |
| 44 | #include <vm/vm.h> |
| 45 | #include <vm/vm_object.h> |
| 46 | #include <vm/pmap.h> |
| 47 | |
| 48 | #define REG_GARTCTRL 0 |
| 49 | #define REG_APSIZE 1 |
| 50 | #define REG_ATTBASE 2 |
| 51 | |
| 52 | struct agp_via_softc { |
| 53 | struct agp_softc agp; |
| 54 | u_int32_t initial_aperture; /* aperture size at startup */ |
| 55 | struct agp_gatt *gatt; |
| 56 | int *regs; |
| 57 | }; |
| 58 | |
| 59 | static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, |
| 60 | AGP_VIA_ATTBASE }; |
| 61 | static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, |
| 62 | AGP3_VIA_ATTBASE }; |
| 63 | |
| 64 | static const char* |
| 65 | agp_via_match(device_t dev) |
| 66 | { |
| 67 | if (pci_get_class(dev) != PCIC_BRIDGE |
| 68 | || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) |
| 69 | return NULL; |
| 70 | |
| 71 | if (agp_find_caps(dev) == 0) |
| 72 | return NULL; |
| 73 | |
| 74 | switch (pci_get_devid(dev)) { |
| 75 | case 0x01981106: |
| 76 | return ("VIA 8763 (P4X600) host to PCI bridge"); |
| 77 | case 0x02591106: |
| 78 | return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge"); |
| 79 | case 0x02691106: |
| 80 | return ("VIA KT880 host to PCI bridge"); |
| 81 | case 0x02961106: |
| 82 | return ("VIA 3296 (P4M800) host to PCI bridge"); |
| 83 | case 0x03051106: |
| 84 | return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge"); |
| 85 | case 0x03911106: |
| 86 | return ("VIA 8371 (Apollo KX133) host to PCI bridge"); |
| 87 | case 0x05011106: |
| 88 | return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); |
| 89 | case 0x05971106: |
| 90 | return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); |
| 91 | case 0x05981106: |
| 92 | return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); |
| 93 | case 0x06011106: |
| 94 | return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge"); |
| 95 | case 0x06051106: |
| 96 | return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); |
| 97 | case 0x06911106: |
| 98 | return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); |
| 99 | case 0x30911106: |
| 100 | return ("VIA 8633 (Pro 266) host to PCI bridge"); |
| 101 | case 0x30991106: |
| 102 | return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge"); |
| 103 | case 0x31011106: |
| 104 | return ("VIA 8653 (Pro266T) host to PCI bridge"); |
| 105 | case 0x31121106: |
| 106 | return ("VIA 8361 (KLE133) host to PCI bridge"); |
| 107 | case 0x31161106: |
| 108 | return ("VIA XM266 (PM266/KM266) host to PCI bridge"); |
| 109 | case 0x31231106: |
| 110 | return ("VIA 862x (CLE266) host to PCI bridge"); |
| 111 | case 0x31281106: |
| 112 | return ("VIA 8753 (P4X266) host to PCI bridge"); |
| 113 | case 0x31481106: |
| 114 | return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge"); |
| 115 | case 0x31561106: |
| 116 | return ("VIA XN266 (Apollo Pro266) host to PCI bridge"); |
| 117 | case 0x31681106: |
| 118 | return ("VIA 8754 (PT800) host to PCI bridge"); |
| 119 | case 0x31891106: |
| 120 | return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge"); |
| 121 | case 0x32051106: |
| 122 | return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge"); |
| 123 | case 0x32081106: |
| 124 | return ("VIA 8783 (PT890) host to PCI bridge"); |
| 125 | case 0x32581106: |
| 126 | return ("VIA PT880 host to PCI bridge"); |
| 127 | case 0xb1981106: |
| 128 | return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge"); |
| 129 | }; |
| 130 | |
| 131 | return NULL; |
| 132 | } |
| 133 | |
| 134 | static int |
| 135 | agp_via_probe(device_t dev) |
| 136 | { |
| 137 | const char *desc; |
| 138 | |
| 139 | if (resource_disabled("agp", device_get_unit(dev))) |
| 140 | return (ENXIO); |
| 141 | desc = agp_via_match(dev); |
| 142 | if (desc) { |
| 143 | device_verbose(dev); |
| 144 | device_set_desc(dev, desc); |
| 145 | return BUS_PROBE_DEFAULT; |
| 146 | } |
| 147 | |
| 148 | return ENXIO; |
| 149 | } |
| 150 | |
| 151 | static int |
| 152 | agp_via_attach(device_t dev) |
| 153 | { |
| 154 | struct agp_via_softc *sc = device_get_softc(dev); |
| 155 | struct agp_gatt *gatt; |
| 156 | int error; |
| 157 | u_int32_t agpsel; |
| 158 | |
| 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. |
| 161 | */ |
| 162 | switch (pci_get_devid(dev)) { |
| 163 | case 0x01981106: |
| 164 | case 0x02591106: |
| 165 | case 0x02691106: |
| 166 | case 0x02961106: |
| 167 | case 0x31231106: |
| 168 | case 0x31681106: |
| 169 | case 0x31891106: |
| 170 | case 0x32051106: |
| 171 | case 0x32581106: |
| 172 | case 0xb1981106: |
| 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. |
| 177 | */ |
| 178 | agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1); |
| 179 | if ((agpsel & (1 << 1)) == 0) |
| 180 | sc->regs = via_v3_regs; |
| 181 | else |
| 182 | sc->regs = via_v2_regs; |
| 183 | break; |
| 184 | default: |
| 185 | sc->regs = via_v2_regs; |
| 186 | break; |
| 187 | } |
| 188 | |
| 189 | error = agp_generic_attach(dev); |
| 190 | if (error) |
| 191 | return error; |
| 192 | |
| 193 | sc->initial_aperture = AGP_GET_APERTURE(dev); |
| 194 | if (sc->initial_aperture == 0) { |
| 195 | device_printf(dev, "bad initial aperture size, disabling\n"); |
| 196 | return ENXIO; |
| 197 | } |
| 198 | |
| 199 | for (;;) { |
| 200 | gatt = agp_alloc_gatt(dev); |
| 201 | if (gatt) |
| 202 | break; |
| 203 | |
| 204 | /* |
| 205 | * Probably contigmalloc failure. Try reducing the |
| 206 | * aperture so that the gatt size reduces. |
| 207 | */ |
| 208 | if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { |
| 209 | agp_generic_detach(dev); |
| 210 | return ENOMEM; |
| 211 | } |
| 212 | } |
| 213 | sc->gatt = gatt; |
| 214 | |
| 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); |
| 218 | |
| 219 | /* Enable the aperture. */ |
| 220 | pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); |
| 221 | } else { |
| 222 | u_int32_t gartctrl; |
| 223 | |
| 224 | /* Install the gatt. */ |
| 225 | pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4); |
| 226 | |
| 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); |
| 230 | } |
| 231 | |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static int |
| 236 | agp_via_detach(device_t dev) |
| 237 | { |
| 238 | struct agp_via_softc *sc = device_get_softc(dev); |
| 239 | int error; |
| 240 | |
| 241 | error = agp_generic_detach(dev); |
| 242 | if (error) |
| 243 | return error; |
| 244 | |
| 245 | pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); |
| 246 | pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); |
| 247 | AGP_SET_APERTURE(dev, sc->initial_aperture); |
| 248 | agp_free_gatt(sc->gatt); |
| 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static u_int32_t |
| 254 | agp_via_get_aperture(device_t dev) |
| 255 | { |
| 256 | struct agp_via_softc *sc = device_get_softc(dev); |
| 257 | u_int32_t apsize; |
| 258 | |
| 259 | apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f; |
| 260 | |
| 261 | /* |
| 262 | * The size is determined by the number of low bits of |
| 263 | * register APBASE which are forced to zero. The low 20 bits |
| 264 | * are always forced to zero and each zero bit in the apsize |
| 265 | * field just read forces the corresponding bit in the 27:20 |
| 266 | * to be zero. We calculate the aperture size accordingly. |
| 267 | */ |
| 268 | return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; |
| 269 | } |
| 270 | |
| 271 | static int |
| 272 | agp_via_set_aperture(device_t dev, u_int32_t aperture) |
| 273 | { |
| 274 | struct agp_via_softc *sc = device_get_softc(dev); |
| 275 | u_int32_t apsize; |
| 276 | |
| 277 | /* |
| 278 | * Reverse the magic from get_aperture. |
| 279 | */ |
| 280 | apsize = ((aperture - 1) >> 20) ^ 0xff; |
| 281 | |
| 282 | /* |
| 283 | * Double check for sanity. |
| 284 | */ |
| 285 | if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) |
| 286 | return EINVAL; |
| 287 | |
| 288 | pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | static int |
| 294 | agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) |
| 295 | { |
| 296 | struct agp_via_softc *sc = device_get_softc(dev); |
| 297 | |
| 298 | if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
| 299 | return EINVAL; |
| 300 | |
| 301 | sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | static int |
| 306 | agp_via_unbind_page(device_t dev, int offset) |
| 307 | { |
| 308 | struct agp_via_softc *sc = device_get_softc(dev); |
| 309 | |
| 310 | if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) |
| 311 | return EINVAL; |
| 312 | |
| 313 | sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | static void |
| 318 | agp_via_flush_tlb(device_t dev) |
| 319 | { |
| 320 | struct agp_via_softc *sc = device_get_softc(dev); |
| 321 | u_int32_t gartctrl; |
| 322 | |
| 323 | if (sc->regs == via_v2_regs) { |
| 324 | pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); |
| 325 | pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); |
| 326 | } else { |
| 327 | gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); |
| 328 | pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl & |
| 329 | ~(1 << 7), 4); |
| 330 | pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4); |
| 331 | } |
| 332 | |
| 333 | } |
| 334 | |
| 335 | static device_method_t agp_via_methods[] = { |
| 336 | /* Device interface */ |
| 337 | DEVMETHOD(device_probe, agp_via_probe), |
| 338 | DEVMETHOD(device_attach, agp_via_attach), |
| 339 | DEVMETHOD(device_detach, agp_via_detach), |
| 340 | DEVMETHOD(device_shutdown, bus_generic_shutdown), |
| 341 | DEVMETHOD(device_suspend, bus_generic_suspend), |
| 342 | DEVMETHOD(device_resume, bus_generic_resume), |
| 343 | |
| 344 | /* AGP interface */ |
| 345 | DEVMETHOD(agp_get_aperture, agp_via_get_aperture), |
| 346 | DEVMETHOD(agp_set_aperture, agp_via_set_aperture), |
| 347 | DEVMETHOD(agp_bind_page, agp_via_bind_page), |
| 348 | DEVMETHOD(agp_unbind_page, agp_via_unbind_page), |
| 349 | DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), |
| 350 | DEVMETHOD(agp_enable, agp_generic_enable), |
| 351 | DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), |
| 352 | DEVMETHOD(agp_free_memory, agp_generic_free_memory), |
| 353 | DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), |
| 354 | DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), |
| 355 | |
| 356 | { 0, 0 } |
| 357 | }; |
| 358 | |
| 359 | static driver_t agp_via_driver = { |
| 360 | "agp", |
| 361 | agp_via_methods, |
| 362 | sizeof(struct agp_via_softc), |
| 363 | }; |
| 364 | |
| 365 | static devclass_t agp_devclass; |
| 366 | |
| 367 | DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, 0, 0); |
| 368 | MODULE_DEPEND(agp_via, agp, 1, 1, 1); |
| 369 | MODULE_DEPEND(agp_via, pci, 1, 1, 1); |