Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/pci/agp_ati.c
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1 /*- 2 * Copyright (c) 2005 Eric Anholt 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 * Based on reading the Linux 2.6.8.1 driver by Dave Jones. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD: releng/6.4/sys/pci/agp_ati.c 173478 2007-11-08 20:50:13Z jhb $"); 31 32 #include "opt_bus.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/lock.h> 41 #include <sys/mutex.h> 42 #include <sys/proc.h> 43 44 #include <dev/pci/pcivar.h> 45 #include <dev/pci/pcireg.h> 46 #include <pci/agppriv.h> 47 #include <pci/agpreg.h> 48 49 #include <vm/vm.h> 50 #include <vm/vm_object.h> 51 #include <vm/pmap.h> 52 #include <machine/bus.h> 53 #include <machine/resource.h> 54 #include <sys/rman.h> 55 56 MALLOC_DECLARE(M_AGP); 57 58 #define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off) 59 #define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v) 60 61 struct agp_ati_softc { 62 struct agp_softc agp; 63 struct resource *regs; /* memory mapped control registers */ 64 bus_space_tag_t bst; /* bus_space tag */ 65 bus_space_handle_t bsh; /* bus_space handle */ 66 u_int32_t initial_aperture; /* aperture size at startup */ 67 char is_rs300; 68 69 /* The GATT */ 70 u_int32_t ag_entries; 71 u_int32_t *ag_virtual; /* virtual address of gatt */ 72 u_int32_t *ag_vdir; /* virtual address of page dir */ 73 vm_offset_t ag_pdir; /* physical address of page dir */ 74 }; 75 76 77 static const char* 78 agp_ati_match(device_t dev) 79 { 80 if (pci_get_class(dev) != PCIC_BRIDGE || 81 pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 82 return NULL; 83 84 if (agp_find_caps(dev) == 0) 85 return NULL; 86 87 switch (pci_get_devid(dev)) { 88 case 0xcab01002: 89 return ("ATI RS100 AGP bridge"); 90 case 0xcab21002: 91 return ("ATI RS200 AGP bridge"); 92 case 0xcbb21002: 93 return ("ATI RS200M AGP bridge"); 94 case 0xcab31002: 95 return ("ATI RS250 AGP bridge"); 96 case 0x58301002: 97 return ("ATI RS300_100 AGP bridge"); 98 case 0x58311002: 99 return ("ATI RS300_133 AGP bridge"); 100 case 0x58321002: 101 return ("ATI RS300_166 AGP bridge"); 102 case 0x58331002: 103 return ("ATI RS300_200 AGP bridge"); 104 }; 105 106 return NULL; 107 } 108 109 static int 110 agp_ati_probe(device_t dev) 111 { 112 const char *desc; 113 114 desc = agp_ati_match(dev); 115 if (desc) { 116 device_verbose(dev); 117 device_set_desc(dev, desc); 118 return 0; 119 } 120 121 return ENXIO; 122 } 123 124 static int 125 agp_ati_alloc_gatt(device_t dev) 126 { 127 struct agp_ati_softc *sc = device_get_softc(dev); 128 u_int32_t apsize = AGP_GET_APERTURE(dev); 129 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 130 u_int32_t apbase_offset; 131 int i; 132 133 /* Alloc the GATT -- pointers to pages of AGP memory */ 134 sc->ag_entries = entries; 135 sc->ag_virtual = malloc(entries * sizeof(u_int32_t), M_AGP, 136 M_NOWAIT | M_ZERO); 137 if (sc->ag_virtual == NULL) { 138 if (bootverbose) 139 device_printf(dev, "aperture allocation failed\n"); 140 return ENOMEM; 141 } 142 143 /* Alloc the page directory -- pointers to each page of the GATT */ 144 sc->ag_vdir = malloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT | M_ZERO); 145 if (sc->ag_vdir == NULL) { 146 if (bootverbose) 147 device_printf(dev, "pagedir allocation failed\n"); 148 free(sc->ag_virtual, M_AGP); 149 return ENOMEM; 150 } 151 sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir); 152 153 apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22; 154 /* Fill in the pagedir's pointers to GATT pages */ 155 for (i = 0; i < sc->ag_entries / 1024; i++) { 156 vm_offset_t va; 157 vm_offset_t pa; 158 159 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE; 160 pa = vtophys(va); 161 sc->ag_vdir[apbase_offset + i] = pa | 1; 162 } 163 164 /* 165 * Make sure the chipset can see everything. 166 */ 167 agp_flush_cache(); 168 169 return 0; 170 } 171 172 173 static int 174 agp_ati_attach(device_t dev) 175 { 176 struct agp_ati_softc *sc = device_get_softc(dev); 177 int error, rid; 178 u_int32_t temp; 179 u_int32_t apsize_reg, agpmode_reg; 180 181 error = agp_generic_attach(dev); 182 if (error) 183 return error; 184 185 switch (pci_get_devid(dev)) { 186 case 0xcab01002: /* ATI RS100 AGP bridge */ 187 case 0xcab21002: /* ATI RS200 AGP bridge */ 188 case 0xcbb21002: /* ATI RS200M AGP bridge */ 189 case 0xcab31002: /* ATI RS250 AGP bridge */ 190 sc->is_rs300 = 0; 191 apsize_reg = ATI_RS100_APSIZE; 192 agpmode_reg = ATI_RS100_IG_AGPMODE; 193 break; 194 case 0x58301002: /* ATI RS300_100 AGP bridge */ 195 case 0x58311002: /* ATI RS300_133 AGP bridge */ 196 case 0x58321002: /* ATI RS300_166 AGP bridge */ 197 case 0x58331002: /* ATI RS300_200 AGP bridge */ 198 sc->is_rs300 = 1; 199 apsize_reg = ATI_RS300_APSIZE; 200 agpmode_reg = ATI_RS300_IG_AGPMODE; 201 break; 202 default: 203 /* Unknown chipset */ 204 return EINVAL; 205 }; 206 207 rid = ATI_GART_MMADDR; 208 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 209 if (!sc->regs) { 210 agp_generic_detach(dev); 211 return ENOMEM; 212 } 213 214 sc->bst = rman_get_bustag(sc->regs); 215 sc->bsh = rman_get_bushandle(sc->regs); 216 217 sc->initial_aperture = AGP_GET_APERTURE(dev); 218 219 for (;;) { 220 if (agp_ati_alloc_gatt(dev) == 0) 221 break; 222 223 /* 224 * Probably contigmalloc failure. Try reducing the 225 * aperture so that the gatt size reduces. 226 */ 227 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) 228 return ENOMEM; 229 } 230 231 temp = pci_read_config(dev, apsize_reg, 4); 232 pci_write_config(dev, apsize_reg, temp | 1, 4); 233 234 pci_write_config(dev, agpmode_reg, 0x20000, 4); 235 236 WRITE4(ATI_GART_FEATURE_ID, 0x00060000); 237 238 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */ 239 pci_write_config(dev, 4, temp | (1 << 14), 4); 240 241 WRITE4(ATI_GART_BASE, sc->ag_pdir); 242 243 AGP_FLUSH_TLB(dev); 244 245 return 0; 246 } 247 248 static int 249 agp_ati_detach(device_t dev) 250 { 251 struct agp_ati_softc *sc = device_get_softc(dev); 252 u_int32_t apsize_reg, temp; 253 254 agp_free_cdev(dev); 255 256 if (sc->is_rs300) 257 apsize_reg = ATI_RS300_APSIZE; 258 else 259 apsize_reg = ATI_RS100_APSIZE; 260 261 /* Clear the GATT base */ 262 WRITE4(ATI_GART_BASE, 0); 263 264 /* Put the aperture back the way it started. */ 265 AGP_SET_APERTURE(dev, sc->initial_aperture); 266 267 temp = pci_read_config(dev, apsize_reg, 4); 268 pci_write_config(dev, apsize_reg, temp & ~1, 4); 269 270 free(sc->ag_vdir, M_AGP); 271 free(sc->ag_virtual, M_AGP); 272 273 bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs); 274 agp_free_res(dev); 275 276 return 0; 277 } 278 279 static u_int32_t 280 agp_ati_get_aperture(device_t dev) 281 { 282 struct agp_ati_softc *sc = device_get_softc(dev); 283 int size_value; 284 285 if (sc->is_rs300) 286 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4); 287 else 288 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4); 289 290 size_value = (size_value & 0x0000000e) >> 1; 291 size_value = (32 * 1024 * 1024) << size_value; 292 293 return size_value; 294 } 295 296 static int 297 agp_ati_set_aperture(device_t dev, u_int32_t aperture) 298 { 299 struct agp_ati_softc *sc = device_get_softc(dev); 300 int size_value; 301 u_int32_t apsize_reg; 302 303 if (sc->is_rs300) 304 apsize_reg = ATI_RS300_APSIZE; 305 else 306 apsize_reg = ATI_RS100_APSIZE; 307 308 size_value = pci_read_config(dev, apsize_reg, 4); 309 310 size_value &= ~0x0000000e; 311 size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1; 312 313 pci_write_config(dev, apsize_reg, size_value, 4); 314 315 return 0; 316 } 317 318 static int 319 agp_ati_bind_page(device_t dev, int offset, vm_offset_t physical) 320 { 321 struct agp_ati_softc *sc = device_get_softc(dev); 322 323 if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 324 return EINVAL; 325 326 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1; 327 328 return 0; 329 } 330 331 static int 332 agp_ati_unbind_page(device_t dev, int offset) 333 { 334 struct agp_ati_softc *sc = device_get_softc(dev); 335 336 if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 337 return EINVAL; 338 339 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 340 return 0; 341 } 342 343 static void 344 agp_ati_flush_tlb(device_t dev) 345 { 346 struct agp_ati_softc *sc = device_get_softc(dev); 347 348 /* Set the cache invalidate bit and wait for the chipset to clear */ 349 WRITE4(ATI_GART_CACHE_CNTRL, 1); 350 (void)READ4(ATI_GART_CACHE_CNTRL); 351 } 352 353 static device_method_t agp_ati_methods[] = { 354 /* Device interface */ 355 DEVMETHOD(device_probe, agp_ati_probe), 356 DEVMETHOD(device_attach, agp_ati_attach), 357 DEVMETHOD(device_detach, agp_ati_detach), 358 DEVMETHOD(device_shutdown, bus_generic_shutdown), 359 DEVMETHOD(device_suspend, bus_generic_suspend), 360 DEVMETHOD(device_resume, bus_generic_resume), 361 362 /* AGP interface */ 363 DEVMETHOD(agp_get_aperture, agp_ati_get_aperture), 364 DEVMETHOD(agp_set_aperture, agp_ati_set_aperture), 365 DEVMETHOD(agp_bind_page, agp_ati_bind_page), 366 DEVMETHOD(agp_unbind_page, agp_ati_unbind_page), 367 DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb), 368 DEVMETHOD(agp_enable, agp_generic_enable), 369 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 370 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 371 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 372 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 373 374 { 0, 0 } 375 }; 376 377 static driver_t agp_ati_driver = { 378 "agp", 379 agp_ati_methods, 380 sizeof(struct agp_ati_softc), 381 }; 382 383 static devclass_t agp_devclass; 384 385 DRIVER_MODULE(agp_ati, pci, agp_ati_driver, agp_devclass, 0, 0); 386 MODULE_DEPEND(agp_ati, agp, 1, 1, 1); 387 MODULE_DEPEND(agp_ati, pci, 1, 1, 1);
Cache object: e76ac83ed24230cb90f97f897508853d
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