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("$FreeBSD$"); 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 0xcab31002: 93 return ("ATI RS250 AGP bridge"); 94 case 0x58301002: 95 return ("ATI RS300_100 AGP bridge"); 96 case 0x58311002: 97 return ("ATI RS300_133 AGP bridge"); 98 case 0x58321002: 99 return ("ATI RS300_166 AGP bridge"); 100 case 0x58331002: 101 return ("ATI RS300_200 AGP bridge"); 102 }; 103 104 return NULL; 105 } 106 107 static int 108 agp_ati_probe(device_t dev) 109 { 110 const char *desc; 111 112 desc = agp_ati_match(dev); 113 if (desc) { 114 device_verbose(dev); 115 device_set_desc(dev, desc); 116 return 0; 117 } 118 119 return ENXIO; 120 } 121 122 static int 123 agp_ati_alloc_gatt(device_t dev) 124 { 125 struct agp_ati_softc *sc = device_get_softc(dev); 126 u_int32_t apsize = AGP_GET_APERTURE(dev); 127 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 128 u_int32_t apbase_offset; 129 int i; 130 131 /* Alloc the GATT -- pointers to pages of AGP memory */ 132 sc->ag_entries = entries; 133 sc->ag_virtual = malloc(entries * sizeof(u_int32_t), M_AGP, 134 M_NOWAIT | M_ZERO); 135 if (sc->ag_virtual == NULL) { 136 if (bootverbose) 137 device_printf(dev, "aperture allocation failed\n"); 138 return ENOMEM; 139 } 140 141 /* Alloc the page directory -- pointers to each page of the GATT */ 142 sc->ag_vdir = malloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT | M_ZERO); 143 if (sc->ag_vdir == NULL) { 144 if (bootverbose) 145 device_printf(dev, "pagedir allocation failed\n"); 146 free(sc->ag_virtual, M_AGP); 147 return ENOMEM; 148 } 149 sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir); 150 151 apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22; 152 /* Fill in the pagedir's pointers to GATT pages */ 153 for (i = 0; i < sc->ag_entries / 1024; i++) { 154 vm_offset_t va; 155 vm_offset_t pa; 156 157 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE; 158 pa = vtophys(va); 159 sc->ag_vdir[apbase_offset + i] = pa | 1; 160 } 161 162 /* 163 * Make sure the chipset can see everything. 164 */ 165 agp_flush_cache(); 166 167 return 0; 168 } 169 170 171 static int 172 agp_ati_attach(device_t dev) 173 { 174 struct agp_ati_softc *sc = device_get_softc(dev); 175 int error, rid; 176 u_int32_t temp; 177 u_int32_t apsize_reg, agpmode_reg; 178 179 error = agp_generic_attach(dev); 180 if (error) 181 return error; 182 183 switch (pci_get_devid(dev)) { 184 case 0xcab01002: /* ATI RS100 AGP bridge */ 185 case 0xcab21002: /*ATI RS200 AGP bridge */ 186 case 0xcab31002: /* ATI RS250 AGP bridge */ 187 sc->is_rs300 = 0; 188 apsize_reg = ATI_RS100_APSIZE; 189 agpmode_reg = ATI_RS100_IG_AGPMODE; 190 break; 191 case 0x58301002: /* ATI RS300_100 AGP bridge */ 192 case 0x58311002: /* ATI RS300_133 AGP bridge */ 193 case 0x58321002: /* ATI RS300_166 AGP bridge */ 194 case 0x58331002: /* ATI RS300_200 AGP bridge */ 195 sc->is_rs300 = 1; 196 apsize_reg = ATI_RS300_APSIZE; 197 agpmode_reg = ATI_RS300_IG_AGPMODE; 198 break; 199 default: 200 /* Unknown chipset */ 201 return EINVAL; 202 }; 203 204 rid = ATI_GART_MMADDR; 205 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 206 if (!sc->regs) { 207 agp_generic_detach(dev); 208 return ENOMEM; 209 } 210 211 sc->bst = rman_get_bustag(sc->regs); 212 sc->bsh = rman_get_bushandle(sc->regs); 213 214 sc->initial_aperture = AGP_GET_APERTURE(dev); 215 216 for (;;) { 217 if (agp_ati_alloc_gatt(dev) == 0) 218 break; 219 220 /* 221 * Probably contigmalloc failure. Try reducing the 222 * aperture so that the gatt size reduces. 223 */ 224 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) 225 return ENOMEM; 226 } 227 228 temp = pci_read_config(dev, apsize_reg, 4); 229 pci_write_config(dev, apsize_reg, temp | 1, 4); 230 231 pci_write_config(dev, agpmode_reg, 0x20000, 4); 232 233 WRITE4(ATI_GART_FEATURE_ID, 0x00060000); 234 235 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */ 236 pci_write_config(dev, 4, temp | (1 << 14), 4); 237 238 WRITE4(ATI_GART_BASE, sc->ag_pdir); 239 240 AGP_FLUSH_TLB(dev); 241 242 return 0; 243 } 244 245 static int 246 agp_ati_detach(device_t dev) 247 { 248 struct agp_ati_softc *sc = device_get_softc(dev); 249 int error; 250 u_int32_t apsize_reg, temp; 251 252 if (sc->is_rs300) 253 apsize_reg = ATI_RS300_APSIZE; 254 else 255 apsize_reg = ATI_RS100_APSIZE; 256 257 error = agp_generic_detach(dev); 258 if (error) 259 return error; 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); 274 275 return 0; 276 } 277 278 static u_int32_t 279 agp_ati_get_aperture(device_t dev) 280 { 281 struct agp_ati_softc *sc = device_get_softc(dev); 282 int size_value; 283 284 if (sc->is_rs300) 285 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4); 286 else 287 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4); 288 289 size_value = (size_value & 0x0000000e) >> 1; 290 size_value = (32 * 1024 * 1024) << size_value; 291 292 return size_value; 293 } 294 295 static int 296 agp_ati_set_aperture(device_t dev, u_int32_t aperture) 297 { 298 struct agp_ati_softc *sc = device_get_softc(dev); 299 int size_value; 300 u_int32_t apsize_reg; 301 302 if (sc->is_rs300) 303 apsize_reg = ATI_RS300_APSIZE; 304 else 305 apsize_reg = ATI_RS100_APSIZE; 306 307 size_value = pci_read_config(dev, apsize_reg, 4); 308 309 size_value &= ~0x0000000e; 310 size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1; 311 312 pci_write_config(dev, apsize_reg, size_value, 4); 313 314 return 0; 315 } 316 317 static int 318 agp_ati_bind_page(device_t dev, int offset, vm_offset_t physical) 319 { 320 struct agp_ati_softc *sc = device_get_softc(dev); 321 322 if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 323 return EINVAL; 324 325 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1; 326 327 return 0; 328 } 329 330 static int 331 agp_ati_unbind_page(device_t dev, int offset) 332 { 333 struct agp_ati_softc *sc = device_get_softc(dev); 334 335 if (offset < 0 || offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 336 return EINVAL; 337 338 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 339 return 0; 340 } 341 342 static void 343 agp_ati_flush_tlb(device_t dev) 344 { 345 struct agp_ati_softc *sc = device_get_softc(dev); 346 347 /* Set the cache invalidate bit and wait for the chipset to clear */ 348 WRITE4(ATI_GART_CACHE_CNTRL, 1); 349 (void)READ4(ATI_GART_CACHE_CNTRL); 350 } 351 352 static device_method_t agp_ati_methods[] = { 353 /* Device interface */ 354 DEVMETHOD(device_probe, agp_ati_probe), 355 DEVMETHOD(device_attach, agp_ati_attach), 356 DEVMETHOD(device_detach, agp_ati_detach), 357 DEVMETHOD(device_shutdown, bus_generic_shutdown), 358 DEVMETHOD(device_suspend, bus_generic_suspend), 359 DEVMETHOD(device_resume, bus_generic_resume), 360 361 /* AGP interface */ 362 DEVMETHOD(agp_get_aperture, agp_ati_get_aperture), 363 DEVMETHOD(agp_set_aperture, agp_ati_set_aperture), 364 DEVMETHOD(agp_bind_page, agp_ati_bind_page), 365 DEVMETHOD(agp_unbind_page, agp_ati_unbind_page), 366 DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb), 367 DEVMETHOD(agp_enable, agp_generic_enable), 368 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 369 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 370 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 371 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 372 373 { 0, 0 } 374 }; 375 376 static driver_t agp_ati_driver = { 377 "agp", 378 agp_ati_methods, 379 sizeof(struct agp_ati_softc), 380 }; 381 382 static devclass_t agp_devclass; 383 384 DRIVER_MODULE(agp_ati, pci, agp_ati_driver, agp_devclass, 0, 0); 385 MODULE_DEPEND(agp_ati, agp, 1, 1, 1); 386 MODULE_DEPEND(agp_ati, pci, 1, 1, 1); 387