Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/agp/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 * $FreeBSD: src/sys/dev/agp/agp_ati.c,v 1.5 2007/11/12 21:51:36 jhb Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/bus.h> 37 #include <sys/lock.h> 38 #include <sys/proc.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 #include <sys/rman.h> 49 50 MALLOC_DECLARE(M_AGP); 51 52 #define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off) 53 #define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v) 54 55 struct agp_ati_softc { 56 struct agp_softc agp; 57 struct resource *regs; /* memory mapped control registers */ 58 bus_space_tag_t bst; /* bus_space tag */ 59 bus_space_handle_t bsh; /* bus_space handle */ 60 u_int32_t initial_aperture; /* aperture size at startup */ 61 char is_rs300; 62 63 /* The GATT */ 64 u_int32_t ag_entries; 65 u_int32_t *ag_virtual; /* virtual address of gatt */ 66 u_int32_t *ag_vdir; /* virtual address of page dir */ 67 vm_offset_t ag_pdir; /* physical address of page dir */ 68 }; 69 70 71 static const char* 72 agp_ati_match(device_t dev) 73 { 74 if (pci_get_class(dev) != PCIC_BRIDGE || 75 pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 76 return NULL; 77 78 if (agp_find_caps(dev) == 0) 79 return NULL; 80 81 switch (pci_get_devid(dev)) { 82 case 0xcab01002: 83 return ("ATI RS100 AGP bridge"); 84 case 0xcab21002: 85 return ("ATI RS200 AGP bridge"); 86 case 0xcbb21002: 87 return ("ATI RS200M AGP bridge"); 88 case 0xcab31002: 89 return ("ATI RS250 AGP bridge"); 90 case 0x58301002: 91 return ("ATI RS300_100 AGP bridge"); 92 case 0x58311002: 93 return ("ATI RS300_133 AGP bridge"); 94 case 0x58321002: 95 return ("ATI RS300_166 AGP bridge"); 96 case 0x58331002: 97 return ("ATI RS300_200 AGP bridge"); 98 }; 99 100 return NULL; 101 } 102 103 static int 104 agp_ati_probe(device_t dev) 105 { 106 const char *desc; 107 108 desc = agp_ati_match(dev); 109 if (desc) { 110 device_verbose(dev); 111 device_set_desc(dev, desc); 112 return 0; 113 } 114 115 return ENXIO; 116 } 117 118 static int 119 agp_ati_alloc_gatt(device_t dev) 120 { 121 struct agp_ati_softc *sc = device_get_softc(dev); 122 u_int32_t apsize = AGP_GET_APERTURE(dev); 123 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 124 u_int32_t apbase_offset; 125 int i; 126 127 /* Alloc the GATT -- pointers to pages of AGP memory */ 128 sc->ag_entries = entries; 129 sc->ag_virtual = kmalloc(entries * sizeof(u_int32_t), M_AGP, 130 M_NOWAIT | M_ZERO); 131 if (sc->ag_virtual == NULL) { 132 if (bootverbose) 133 device_printf(dev, "aperture allocation failed\n"); 134 return ENOMEM; 135 } 136 137 /* Alloc the page directory -- pointers to each page of the GATT */ 138 sc->ag_vdir = kmalloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT | M_ZERO); 139 if (sc->ag_vdir == NULL) { 140 if (bootverbose) 141 device_printf(dev, "pagedir allocation failed\n"); 142 kfree(sc->ag_virtual, M_AGP); 143 return ENOMEM; 144 } 145 sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir); 146 147 apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22; 148 /* Fill in the pagedir's pointers to GATT pages */ 149 for (i = 0; i < sc->ag_entries / 1024; i++) { 150 vm_offset_t va; 151 vm_offset_t pa; 152 153 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE; 154 pa = vtophys(va); 155 sc->ag_vdir[apbase_offset + i] = pa | 1; 156 } 157 158 /* 159 * Make sure the chipset can see everything. 160 */ 161 agp_flush_cache(); 162 163 return 0; 164 } 165 166 167 static int 168 agp_ati_attach(device_t dev) 169 { 170 struct agp_ati_softc *sc = device_get_softc(dev); 171 int error, rid; 172 u_int32_t temp; 173 u_int32_t apsize_reg, agpmode_reg; 174 175 error = agp_generic_attach(dev); 176 if (error) 177 return error; 178 179 switch (pci_get_devid(dev)) { 180 case 0xcab01002: /* ATI RS100 AGP bridge */ 181 case 0xcab21002: /* ATI RS200 AGP bridge */ 182 case 0xcbb21002: /* ATI RS200M AGP bridge */ 183 case 0xcab31002: /* ATI RS250 AGP bridge */ 184 sc->is_rs300 = 0; 185 apsize_reg = ATI_RS100_APSIZE; 186 agpmode_reg = ATI_RS100_IG_AGPMODE; 187 break; 188 case 0x58301002: /* ATI RS300_100 AGP bridge */ 189 case 0x58311002: /* ATI RS300_133 AGP bridge */ 190 case 0x58321002: /* ATI RS300_166 AGP bridge */ 191 case 0x58331002: /* ATI RS300_200 AGP bridge */ 192 sc->is_rs300 = 1; 193 apsize_reg = ATI_RS300_APSIZE; 194 agpmode_reg = ATI_RS300_IG_AGPMODE; 195 break; 196 default: 197 /* Unknown chipset */ 198 return EINVAL; 199 }; 200 201 rid = ATI_GART_MMADDR; 202 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 203 if (!sc->regs) { 204 agp_generic_detach(dev); 205 return ENOMEM; 206 } 207 208 sc->bst = rman_get_bustag(sc->regs); 209 sc->bsh = rman_get_bushandle(sc->regs); 210 211 sc->initial_aperture = AGP_GET_APERTURE(dev); 212 if (sc->initial_aperture == 0) { 213 device_printf(dev, "bad initial aperture size, disabling\n"); 214 return ENXIO; 215 } 216 217 for (;;) { 218 if (agp_ati_alloc_gatt(dev) == 0) 219 break; 220 221 /* 222 * Probably contigmalloc failure. Try reducing the 223 * aperture so that the gatt size reduces. 224 */ 225 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) 226 return ENOMEM; 227 } 228 229 temp = pci_read_config(dev, apsize_reg, 4); 230 pci_write_config(dev, apsize_reg, temp | 1, 4); 231 232 pci_write_config(dev, agpmode_reg, 0x20000, 4); 233 234 WRITE4(ATI_GART_FEATURE_ID, 0x00060000); 235 236 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */ 237 pci_write_config(dev, 4, temp | (1 << 14), 4); 238 239 WRITE4(ATI_GART_BASE, sc->ag_pdir); 240 241 AGP_FLUSH_TLB(dev); 242 243 return 0; 244 } 245 246 static int 247 agp_ati_detach(device_t dev) 248 { 249 struct agp_ati_softc *sc = device_get_softc(dev); 250 u_int32_t apsize_reg, temp; 251 252 agp_free_cdev(dev); 253 254 if (sc->is_rs300) 255 apsize_reg = ATI_RS300_APSIZE; 256 else 257 apsize_reg = ATI_RS100_APSIZE; 258 259 /* Clear the GATT base */ 260 WRITE4(ATI_GART_BASE, 0); 261 262 /* Put the aperture back the way it started. */ 263 AGP_SET_APERTURE(dev, sc->initial_aperture); 264 265 temp = pci_read_config(dev, apsize_reg, 4); 266 pci_write_config(dev, apsize_reg, temp & ~1, 4); 267 268 kfree(sc->ag_vdir, M_AGP); 269 kfree(sc->ag_virtual, M_AGP); 270 271 bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs); 272 agp_free_res(dev); 273 274 return 0; 275 } 276 277 static u_int32_t 278 agp_ati_get_aperture(device_t dev) 279 { 280 struct agp_ati_softc *sc = device_get_softc(dev); 281 int size_value; 282 283 if (sc->is_rs300) 284 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4); 285 else 286 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4); 287 288 size_value = (size_value & 0x0000000e) >> 1; 289 size_value = (32 * 1024 * 1024) << size_value; 290 291 return size_value; 292 } 293 294 static int 295 agp_ati_set_aperture(device_t dev, u_int32_t aperture) 296 { 297 struct agp_ati_softc *sc = device_get_softc(dev); 298 int size_value; 299 u_int32_t apsize_reg; 300 301 if (sc->is_rs300) 302 apsize_reg = ATI_RS300_APSIZE; 303 else 304 apsize_reg = ATI_RS100_APSIZE; 305 306 size_value = pci_read_config(dev, apsize_reg, 4); 307 308 size_value &= ~0x0000000e; 309 size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1; 310 311 pci_write_config(dev, apsize_reg, size_value, 4); 312 313 return 0; 314 } 315 316 static int 317 agp_ati_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 318 { 319 struct agp_ati_softc *sc = device_get_softc(dev); 320 321 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 322 return EINVAL; 323 324 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1; 325 326 return 0; 327 } 328 329 static int 330 agp_ati_unbind_page(device_t dev, vm_offset_t offset) 331 { 332 struct agp_ati_softc *sc = device_get_softc(dev); 333 334 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 335 return EINVAL; 336 337 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 338 return 0; 339 } 340 341 static void 342 agp_ati_flush_tlb(device_t dev) 343 { 344 struct agp_ati_softc *sc = device_get_softc(dev); 345 346 /* Set the cache invalidate bit and wait for the chipset to clear */ 347 WRITE4(ATI_GART_CACHE_CNTRL, 1); 348 (void)READ4(ATI_GART_CACHE_CNTRL); 349 } 350 351 static device_method_t agp_ati_methods[] = { 352 /* Device interface */ 353 DEVMETHOD(device_probe, agp_ati_probe), 354 DEVMETHOD(device_attach, agp_ati_attach), 355 DEVMETHOD(device_detach, agp_ati_detach), 356 DEVMETHOD(device_shutdown, bus_generic_shutdown), 357 DEVMETHOD(device_suspend, bus_generic_suspend), 358 DEVMETHOD(device_resume, bus_generic_resume), 359 360 /* AGP interface */ 361 DEVMETHOD(agp_get_aperture, agp_ati_get_aperture), 362 DEVMETHOD(agp_set_aperture, agp_ati_set_aperture), 363 DEVMETHOD(agp_bind_page, agp_ati_bind_page), 364 DEVMETHOD(agp_unbind_page, agp_ati_unbind_page), 365 DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb), 366 DEVMETHOD(agp_enable, agp_generic_enable), 367 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 368 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 369 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 370 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 371 372 DEVMETHOD_END 373 }; 374 375 static driver_t agp_ati_driver = { 376 "agp", 377 agp_ati_methods, 378 sizeof(struct agp_ati_softc), 379 }; 380 381 static devclass_t agp_devclass; 382 383 DRIVER_MODULE(agp_ati, pci, agp_ati_driver, agp_devclass, NULL, NULL); 384 MODULE_DEPEND(agp_ati, agp, 1, 1, 1); 385 MODULE_DEPEND(agp_ati, pci, 1, 1, 1);
Cache object: 35f227131241a8e4c7896949c43bdcee
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