1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/bus.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 42 #include <dev/agp/agppriv.h> 43 #include <dev/agp/agpreg.h> 44 #include <dev/pci/pcivar.h> 45 #include <dev/pci/pcireg.h> 46 47 #include <vm/vm.h> 48 #include <vm/vm_extern.h> 49 #include <vm/vm_kern.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 static const char* 77 agp_ati_match(device_t dev) 78 { 79 if (pci_get_class(dev) != PCIC_BRIDGE || 80 pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 81 return NULL; 82 83 if (agp_find_caps(dev) == 0) 84 return NULL; 85 86 switch (pci_get_devid(dev)) { 87 case 0xcab01002: 88 return ("ATI RS100 AGP bridge"); 89 case 0xcab21002: 90 return ("ATI RS200 AGP bridge"); 91 case 0xcbb21002: 92 return ("ATI RS200M AGP bridge"); 93 case 0xcab31002: 94 return ("ATI RS250 AGP bridge"); 95 case 0x58301002: 96 return ("ATI RS300_100 AGP bridge"); 97 case 0x58311002: 98 return ("ATI RS300_133 AGP bridge"); 99 case 0x58321002: 100 return ("ATI RS300_166 AGP bridge"); 101 case 0x58331002: 102 return ("ATI RS300_200 AGP bridge"); 103 } 104 105 return NULL; 106 } 107 108 static int 109 agp_ati_probe(device_t dev) 110 { 111 const char *desc; 112 113 desc = agp_ati_match(dev); 114 if (desc) { 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 = kmem_alloc_attr(entries * sizeof(uint32_t), 134 M_NOWAIT | M_ZERO, 0, ~0, VM_MEMATTR_WRITE_COMBINING); 135 if (sc->ag_virtual == NULL) { 136 if (bootverbose) 137 device_printf(dev, "GATT allocation failed\n"); 138 return ENOMEM; 139 } 140 141 /* Alloc the page directory -- pointers to each page of the GATT */ 142 sc->ag_vdir = kmem_alloc_attr(AGP_PAGE_SIZE, M_NOWAIT | M_ZERO, 143 0, ~0, VM_MEMATTR_WRITE_COMBINING); 144 if (sc->ag_vdir == NULL) { 145 if (bootverbose) 146 device_printf(dev, "pagedir allocation failed\n"); 147 kmem_free(sc->ag_virtual, entries * sizeof(uint32_t)); 148 return ENOMEM; 149 } 150 sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir); 151 152 apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22; 153 /* Fill in the pagedir's pointers to GATT pages */ 154 for (i = 0; i < sc->ag_entries / 1024; i++) { 155 vm_offset_t va; 156 vm_offset_t pa; 157 158 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE; 159 pa = vtophys(va); 160 sc->ag_vdir[apbase_offset + i] = pa | 1; 161 } 162 163 return 0; 164 } 165 166 static int 167 agp_ati_attach(device_t dev) 168 { 169 struct agp_ati_softc *sc = device_get_softc(dev); 170 int error, rid; 171 u_int32_t temp; 172 u_int32_t apsize_reg, agpmode_reg; 173 174 error = agp_generic_attach(dev); 175 if (error) 176 return error; 177 178 switch (pci_get_devid(dev)) { 179 case 0xcab01002: /* ATI RS100 AGP bridge */ 180 case 0xcab21002: /* ATI RS200 AGP bridge */ 181 case 0xcbb21002: /* ATI RS200M AGP bridge */ 182 case 0xcab31002: /* ATI RS250 AGP bridge */ 183 sc->is_rs300 = 0; 184 apsize_reg = ATI_RS100_APSIZE; 185 agpmode_reg = ATI_RS100_IG_AGPMODE; 186 break; 187 case 0x58301002: /* ATI RS300_100 AGP bridge */ 188 case 0x58311002: /* ATI RS300_133 AGP bridge */ 189 case 0x58321002: /* ATI RS300_166 AGP bridge */ 190 case 0x58331002: /* ATI RS300_200 AGP bridge */ 191 sc->is_rs300 = 1; 192 apsize_reg = ATI_RS300_APSIZE; 193 agpmode_reg = ATI_RS300_IG_AGPMODE; 194 break; 195 default: 196 /* Unknown chipset */ 197 return EINVAL; 198 } 199 200 rid = ATI_GART_MMADDR; 201 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 202 if (!sc->regs) { 203 agp_generic_detach(dev); 204 return ENOMEM; 205 } 206 207 sc->bst = rman_get_bustag(sc->regs); 208 sc->bsh = rman_get_bushandle(sc->regs); 209 210 sc->initial_aperture = AGP_GET_APERTURE(dev); 211 212 for (;;) { 213 if (agp_ati_alloc_gatt(dev) == 0) 214 break; 215 216 /* 217 * Probably contigmalloc failure. Try reducing the 218 * aperture so that the gatt size reduces. 219 */ 220 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) 221 return ENOMEM; 222 } 223 224 temp = pci_read_config(dev, apsize_reg, 4); 225 pci_write_config(dev, apsize_reg, temp | 1, 4); 226 227 pci_write_config(dev, agpmode_reg, 0x20000, 4); 228 229 WRITE4(ATI_GART_FEATURE_ID, 0x00060000); 230 231 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */ 232 pci_write_config(dev, 4, temp | (1 << 14), 4); 233 234 WRITE4(ATI_GART_BASE, sc->ag_pdir); 235 236 AGP_FLUSH_TLB(dev); 237 238 return 0; 239 } 240 241 static int 242 agp_ati_detach(device_t dev) 243 { 244 struct agp_ati_softc *sc = device_get_softc(dev); 245 u_int32_t apsize_reg, temp; 246 247 agp_free_cdev(dev); 248 249 if (sc->is_rs300) 250 apsize_reg = ATI_RS300_APSIZE; 251 else 252 apsize_reg = ATI_RS100_APSIZE; 253 254 /* Clear the GATT base */ 255 WRITE4(ATI_GART_BASE, 0); 256 257 /* Put the aperture back the way it started. */ 258 AGP_SET_APERTURE(dev, sc->initial_aperture); 259 260 temp = pci_read_config(dev, apsize_reg, 4); 261 pci_write_config(dev, apsize_reg, temp & ~1, 4); 262 263 kmem_free(sc->ag_vdir, AGP_PAGE_SIZE); 264 kmem_free(sc->ag_virtual, sc->ag_entries * sizeof(uint32_t)); 265 266 bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs); 267 agp_free_res(dev); 268 269 return 0; 270 } 271 272 static u_int32_t 273 agp_ati_get_aperture(device_t dev) 274 { 275 struct agp_ati_softc *sc = device_get_softc(dev); 276 int size_value; 277 278 if (sc->is_rs300) 279 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4); 280 else 281 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4); 282 283 size_value = (size_value & 0x0000000e) >> 1; 284 size_value = (32 * 1024 * 1024) << size_value; 285 286 return size_value; 287 } 288 289 static int 290 agp_ati_set_aperture(device_t dev, u_int32_t aperture) 291 { 292 struct agp_ati_softc *sc = device_get_softc(dev); 293 int size_value; 294 u_int32_t apsize_reg; 295 296 if (sc->is_rs300) 297 apsize_reg = ATI_RS300_APSIZE; 298 else 299 apsize_reg = ATI_RS100_APSIZE; 300 301 size_value = pci_read_config(dev, apsize_reg, 4); 302 303 size_value &= ~0x0000000e; 304 size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1; 305 306 pci_write_config(dev, apsize_reg, size_value, 4); 307 308 return 0; 309 } 310 311 static int 312 agp_ati_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 313 { 314 struct agp_ati_softc *sc = device_get_softc(dev); 315 316 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 317 return EINVAL; 318 319 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1; 320 321 return 0; 322 } 323 324 static int 325 agp_ati_unbind_page(device_t dev, vm_offset_t offset) 326 { 327 struct agp_ati_softc *sc = device_get_softc(dev); 328 329 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 330 return EINVAL; 331 332 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 333 return 0; 334 } 335 336 static void 337 agp_ati_flush_tlb(device_t dev) 338 { 339 struct agp_ati_softc *sc = device_get_softc(dev); 340 341 /* Set the cache invalidate bit and wait for the chipset to clear */ 342 WRITE4(ATI_GART_CACHE_CNTRL, 1); 343 (void)READ4(ATI_GART_CACHE_CNTRL); 344 } 345 346 static device_method_t agp_ati_methods[] = { 347 /* Device interface */ 348 DEVMETHOD(device_probe, agp_ati_probe), 349 DEVMETHOD(device_attach, agp_ati_attach), 350 DEVMETHOD(device_detach, agp_ati_detach), 351 DEVMETHOD(device_shutdown, bus_generic_shutdown), 352 DEVMETHOD(device_suspend, bus_generic_suspend), 353 DEVMETHOD(device_resume, bus_generic_resume), 354 355 /* AGP interface */ 356 DEVMETHOD(agp_get_aperture, agp_ati_get_aperture), 357 DEVMETHOD(agp_set_aperture, agp_ati_set_aperture), 358 DEVMETHOD(agp_bind_page, agp_ati_bind_page), 359 DEVMETHOD(agp_unbind_page, agp_ati_unbind_page), 360 DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb), 361 DEVMETHOD(agp_enable, agp_generic_enable), 362 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 363 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 364 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 365 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 366 { 0, 0 } 367 }; 368 369 static driver_t agp_ati_driver = { 370 "agp", 371 agp_ati_methods, 372 sizeof(struct agp_ati_softc), 373 }; 374 375 DRIVER_MODULE(agp_ati, hostb, agp_ati_driver, 0, 0); 376 MODULE_DEPEND(agp_ati, agp, 1, 1, 1); 377 MODULE_DEPEND(agp_ati, pci, 1, 1, 1); 378