1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2005 Eric Anholt 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * Based on reading the Linux 2.6.8.1 driver by Dave Jones. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 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/agp/agppriv.h> 45 #include <dev/agp/agpreg.h> 46 #include <dev/pci/pcivar.h> 47 #include <dev/pci/pcireg.h> 48 49 #include <vm/vm.h> 50 #include <vm/vm_extern.h> 51 #include <vm/vm_kern.h> 52 #include <vm/vm_object.h> 53 #include <vm/pmap.h> 54 #include <machine/bus.h> 55 #include <machine/resource.h> 56 #include <sys/rman.h> 57 58 MALLOC_DECLARE(M_AGP); 59 60 #define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off) 61 #define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v) 62 63 struct agp_ati_softc { 64 struct agp_softc agp; 65 struct resource *regs; /* memory mapped control registers */ 66 bus_space_tag_t bst; /* bus_space tag */ 67 bus_space_handle_t bsh; /* bus_space handle */ 68 u_int32_t initial_aperture; /* aperture size at startup */ 69 char is_rs300; 70 71 /* The GATT */ 72 u_int32_t ag_entries; 73 u_int32_t *ag_virtual; /* virtual address of gatt */ 74 u_int32_t *ag_vdir; /* virtual address of page dir */ 75 vm_offset_t ag_pdir; /* physical address of page dir */ 76 }; 77 78 static const char* 79 agp_ati_match(device_t dev) 80 { 81 if (pci_get_class(dev) != PCIC_BRIDGE || 82 pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 83 return NULL; 84 85 if (agp_find_caps(dev) == 0) 86 return NULL; 87 88 switch (pci_get_devid(dev)) { 89 case 0xcab01002: 90 return ("ATI RS100 AGP bridge"); 91 case 0xcab21002: 92 return ("ATI RS200 AGP bridge"); 93 case 0xcbb21002: 94 return ("ATI RS200M AGP bridge"); 95 case 0xcab31002: 96 return ("ATI RS250 AGP bridge"); 97 case 0x58301002: 98 return ("ATI RS300_100 AGP bridge"); 99 case 0x58311002: 100 return ("ATI RS300_133 AGP bridge"); 101 case 0x58321002: 102 return ("ATI RS300_166 AGP bridge"); 103 case 0x58331002: 104 return ("ATI RS300_200 AGP bridge"); 105 } 106 107 return NULL; 108 } 109 110 static int 111 agp_ati_probe(device_t dev) 112 { 113 const char *desc; 114 115 desc = agp_ati_match(dev); 116 if (desc) { 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 = (void *)kmem_alloc_attr(entries * sizeof(u_int32_t), 136 M_NOWAIT | M_ZERO, 0, ~0, VM_MEMATTR_WRITE_COMBINING); 137 if (sc->ag_virtual == NULL) { 138 if (bootverbose) 139 device_printf(dev, "GATT allocation failed\n"); 140 return ENOMEM; 141 } 142 143 /* Alloc the page directory -- pointers to each page of the GATT */ 144 sc->ag_vdir = (void *)kmem_alloc_attr(AGP_PAGE_SIZE, M_NOWAIT | M_ZERO, 145 0, ~0, VM_MEMATTR_WRITE_COMBINING); 146 if (sc->ag_vdir == NULL) { 147 if (bootverbose) 148 device_printf(dev, "pagedir allocation failed\n"); 149 kmem_free((vm_offset_t)sc->ag_virtual, entries * 150 sizeof(u_int32_t)); 151 return ENOMEM; 152 } 153 sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir); 154 155 apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22; 156 /* Fill in the pagedir's pointers to GATT pages */ 157 for (i = 0; i < sc->ag_entries / 1024; i++) { 158 vm_offset_t va; 159 vm_offset_t pa; 160 161 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE; 162 pa = vtophys(va); 163 sc->ag_vdir[apbase_offset + i] = pa | 1; 164 } 165 166 return 0; 167 } 168 169 static int 170 agp_ati_attach(device_t dev) 171 { 172 struct agp_ati_softc *sc = device_get_softc(dev); 173 int error, rid; 174 u_int32_t temp; 175 u_int32_t apsize_reg, agpmode_reg; 176 177 error = agp_generic_attach(dev); 178 if (error) 179 return error; 180 181 switch (pci_get_devid(dev)) { 182 case 0xcab01002: /* ATI RS100 AGP bridge */ 183 case 0xcab21002: /* ATI RS200 AGP bridge */ 184 case 0xcbb21002: /* ATI RS200M AGP bridge */ 185 case 0xcab31002: /* ATI RS250 AGP bridge */ 186 sc->is_rs300 = 0; 187 apsize_reg = ATI_RS100_APSIZE; 188 agpmode_reg = ATI_RS100_IG_AGPMODE; 189 break; 190 case 0x58301002: /* ATI RS300_100 AGP bridge */ 191 case 0x58311002: /* ATI RS300_133 AGP bridge */ 192 case 0x58321002: /* ATI RS300_166 AGP bridge */ 193 case 0x58331002: /* ATI RS300_200 AGP bridge */ 194 sc->is_rs300 = 1; 195 apsize_reg = ATI_RS300_APSIZE; 196 agpmode_reg = ATI_RS300_IG_AGPMODE; 197 break; 198 default: 199 /* Unknown chipset */ 200 return EINVAL; 201 } 202 203 rid = ATI_GART_MMADDR; 204 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 205 if (!sc->regs) { 206 agp_generic_detach(dev); 207 return ENOMEM; 208 } 209 210 sc->bst = rman_get_bustag(sc->regs); 211 sc->bsh = rman_get_bushandle(sc->regs); 212 213 sc->initial_aperture = AGP_GET_APERTURE(dev); 214 215 for (;;) { 216 if (agp_ati_alloc_gatt(dev) == 0) 217 break; 218 219 /* 220 * Probably contigmalloc failure. Try reducing the 221 * aperture so that the gatt size reduces. 222 */ 223 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) 224 return ENOMEM; 225 } 226 227 temp = pci_read_config(dev, apsize_reg, 4); 228 pci_write_config(dev, apsize_reg, temp | 1, 4); 229 230 pci_write_config(dev, agpmode_reg, 0x20000, 4); 231 232 WRITE4(ATI_GART_FEATURE_ID, 0x00060000); 233 234 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */ 235 pci_write_config(dev, 4, temp | (1 << 14), 4); 236 237 WRITE4(ATI_GART_BASE, sc->ag_pdir); 238 239 AGP_FLUSH_TLB(dev); 240 241 return 0; 242 } 243 244 static int 245 agp_ati_detach(device_t dev) 246 { 247 struct agp_ati_softc *sc = device_get_softc(dev); 248 u_int32_t apsize_reg, temp; 249 250 agp_free_cdev(dev); 251 252 if (sc->is_rs300) 253 apsize_reg = ATI_RS300_APSIZE; 254 else 255 apsize_reg = ATI_RS100_APSIZE; 256 257 /* Clear the GATT base */ 258 WRITE4(ATI_GART_BASE, 0); 259 260 /* Put the aperture back the way it started. */ 261 AGP_SET_APERTURE(dev, sc->initial_aperture); 262 263 temp = pci_read_config(dev, apsize_reg, 4); 264 pci_write_config(dev, apsize_reg, temp & ~1, 4); 265 266 kmem_free((vm_offset_t)sc->ag_vdir, AGP_PAGE_SIZE); 267 kmem_free((vm_offset_t)sc->ag_virtual, sc->ag_entries * 268 sizeof(u_int32_t)); 269 270 bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs); 271 agp_free_res(dev); 272 273 return 0; 274 } 275 276 static u_int32_t 277 agp_ati_get_aperture(device_t dev) 278 { 279 struct agp_ati_softc *sc = device_get_softc(dev); 280 int size_value; 281 282 if (sc->is_rs300) 283 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4); 284 else 285 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4); 286 287 size_value = (size_value & 0x0000000e) >> 1; 288 size_value = (32 * 1024 * 1024) << size_value; 289 290 return size_value; 291 } 292 293 static int 294 agp_ati_set_aperture(device_t dev, u_int32_t aperture) 295 { 296 struct agp_ati_softc *sc = device_get_softc(dev); 297 int size_value; 298 u_int32_t apsize_reg; 299 300 if (sc->is_rs300) 301 apsize_reg = ATI_RS300_APSIZE; 302 else 303 apsize_reg = ATI_RS100_APSIZE; 304 305 size_value = pci_read_config(dev, apsize_reg, 4); 306 307 size_value &= ~0x0000000e; 308 size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1; 309 310 pci_write_config(dev, apsize_reg, size_value, 4); 311 312 return 0; 313 } 314 315 static int 316 agp_ati_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 317 { 318 struct agp_ati_softc *sc = device_get_softc(dev); 319 320 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 321 return EINVAL; 322 323 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1; 324 325 return 0; 326 } 327 328 static int 329 agp_ati_unbind_page(device_t dev, vm_offset_t offset) 330 { 331 struct agp_ati_softc *sc = device_get_softc(dev); 332 333 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 334 return EINVAL; 335 336 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 337 return 0; 338 } 339 340 static void 341 agp_ati_flush_tlb(device_t dev) 342 { 343 struct agp_ati_softc *sc = device_get_softc(dev); 344 345 /* Set the cache invalidate bit and wait for the chipset to clear */ 346 WRITE4(ATI_GART_CACHE_CNTRL, 1); 347 (void)READ4(ATI_GART_CACHE_CNTRL); 348 } 349 350 static device_method_t agp_ati_methods[] = { 351 /* Device interface */ 352 DEVMETHOD(device_probe, agp_ati_probe), 353 DEVMETHOD(device_attach, agp_ati_attach), 354 DEVMETHOD(device_detach, agp_ati_detach), 355 DEVMETHOD(device_shutdown, bus_generic_shutdown), 356 DEVMETHOD(device_suspend, bus_generic_suspend), 357 DEVMETHOD(device_resume, bus_generic_resume), 358 359 /* AGP interface */ 360 DEVMETHOD(agp_get_aperture, agp_ati_get_aperture), 361 DEVMETHOD(agp_set_aperture, agp_ati_set_aperture), 362 DEVMETHOD(agp_bind_page, agp_ati_bind_page), 363 DEVMETHOD(agp_unbind_page, agp_ati_unbind_page), 364 DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb), 365 DEVMETHOD(agp_enable, agp_generic_enable), 366 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 367 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 368 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 369 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 370 { 0, 0 } 371 }; 372 373 static driver_t agp_ati_driver = { 374 "agp", 375 agp_ati_methods, 376 sizeof(struct agp_ati_softc), 377 }; 378 379 static devclass_t agp_devclass; 380 381 DRIVER_MODULE(agp_ati, hostb, agp_ati_driver, agp_devclass, 0, 0); 382 MODULE_DEPEND(agp_ati, agp, 1, 1, 1); 383 MODULE_DEPEND(agp_ati, pci, 1, 1, 1); 384