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/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/mutex.h> 39 #include <sys/proc.h> 40 41 #include <dev/agp/agppriv.h> 42 #include <dev/agp/agpreg.h> 43 #include <dev/pci/pcivar.h> 44 #include <dev/pci/pcireg.h> 45 46 #include <vm/vm.h> 47 #include <vm/vm_extern.h> 48 #include <vm/vm_kern.h> 49 #include <vm/vm_object.h> 50 #include <vm/pmap.h> 51 #include <machine/bus.h> 52 #include <machine/resource.h> 53 #include <sys/rman.h> 54 55 MALLOC_DECLARE(M_AGP); 56 57 #define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off) 58 #define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v) 59 60 struct agp_ati_softc { 61 struct agp_softc agp; 62 struct resource *regs; /* memory mapped control registers */ 63 bus_space_tag_t bst; /* bus_space tag */ 64 bus_space_handle_t bsh; /* bus_space handle */ 65 u_int32_t initial_aperture; /* aperture size at startup */ 66 char is_rs300; 67 68 /* The GATT */ 69 u_int32_t ag_entries; 70 u_int32_t *ag_virtual; /* virtual address of gatt */ 71 u_int32_t *ag_vdir; /* virtual address of page dir */ 72 vm_offset_t ag_pdir; /* physical address of page dir */ 73 }; 74 75 static const char* 76 agp_ati_match(device_t dev) 77 { 78 if (pci_get_class(dev) != PCIC_BRIDGE || 79 pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 80 return NULL; 81 82 if (agp_find_caps(dev) == 0) 83 return NULL; 84 85 switch (pci_get_devid(dev)) { 86 case 0xcab01002: 87 return ("ATI RS100 AGP bridge"); 88 case 0xcab21002: 89 return ("ATI RS200 AGP bridge"); 90 case 0xcbb21002: 91 return ("ATI RS200M 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_set_desc(dev, desc); 115 return 0; 116 } 117 118 return ENXIO; 119 } 120 121 static int 122 agp_ati_alloc_gatt(device_t dev) 123 { 124 struct agp_ati_softc *sc = device_get_softc(dev); 125 u_int32_t apsize = AGP_GET_APERTURE(dev); 126 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 127 u_int32_t apbase_offset; 128 int i; 129 130 /* Alloc the GATT -- pointers to pages of AGP memory */ 131 sc->ag_entries = entries; 132 sc->ag_virtual = kmem_alloc_attr(entries * sizeof(uint32_t), 133 M_NOWAIT | M_ZERO, 0, ~0, VM_MEMATTR_WRITE_COMBINING); 134 if (sc->ag_virtual == NULL) { 135 if (bootverbose) 136 device_printf(dev, "GATT allocation failed\n"); 137 return ENOMEM; 138 } 139 140 /* Alloc the page directory -- pointers to each page of the GATT */ 141 sc->ag_vdir = kmem_alloc_attr(AGP_PAGE_SIZE, M_NOWAIT | M_ZERO, 142 0, ~0, VM_MEMATTR_WRITE_COMBINING); 143 if (sc->ag_vdir == NULL) { 144 if (bootverbose) 145 device_printf(dev, "pagedir allocation failed\n"); 146 kmem_free(sc->ag_virtual, entries * sizeof(uint32_t)); 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 return 0; 163 } 164 165 static int 166 agp_ati_attach(device_t dev) 167 { 168 struct agp_ati_softc *sc = device_get_softc(dev); 169 int error, rid; 170 u_int32_t temp; 171 u_int32_t apsize_reg, agpmode_reg; 172 173 error = agp_generic_attach(dev); 174 if (error) 175 return error; 176 177 switch (pci_get_devid(dev)) { 178 case 0xcab01002: /* ATI RS100 AGP bridge */ 179 case 0xcab21002: /* ATI RS200 AGP bridge */ 180 case 0xcbb21002: /* ATI RS200M AGP bridge */ 181 case 0xcab31002: /* ATI RS250 AGP bridge */ 182 sc->is_rs300 = 0; 183 apsize_reg = ATI_RS100_APSIZE; 184 agpmode_reg = ATI_RS100_IG_AGPMODE; 185 break; 186 case 0x58301002: /* ATI RS300_100 AGP bridge */ 187 case 0x58311002: /* ATI RS300_133 AGP bridge */ 188 case 0x58321002: /* ATI RS300_166 AGP bridge */ 189 case 0x58331002: /* ATI RS300_200 AGP bridge */ 190 sc->is_rs300 = 1; 191 apsize_reg = ATI_RS300_APSIZE; 192 agpmode_reg = ATI_RS300_IG_AGPMODE; 193 break; 194 default: 195 /* Unknown chipset */ 196 return EINVAL; 197 } 198 199 rid = ATI_GART_MMADDR; 200 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 201 if (!sc->regs) { 202 agp_generic_detach(dev); 203 return ENOMEM; 204 } 205 206 sc->bst = rman_get_bustag(sc->regs); 207 sc->bsh = rman_get_bushandle(sc->regs); 208 209 sc->initial_aperture = AGP_GET_APERTURE(dev); 210 211 for (;;) { 212 if (agp_ati_alloc_gatt(dev) == 0) 213 break; 214 215 /* 216 * Probably contigmalloc failure. Try reducing the 217 * aperture so that the gatt size reduces. 218 */ 219 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) 220 return ENOMEM; 221 } 222 223 temp = pci_read_config(dev, apsize_reg, 4); 224 pci_write_config(dev, apsize_reg, temp | 1, 4); 225 226 pci_write_config(dev, agpmode_reg, 0x20000, 4); 227 228 WRITE4(ATI_GART_FEATURE_ID, 0x00060000); 229 230 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */ 231 pci_write_config(dev, 4, temp | (1 << 14), 4); 232 233 WRITE4(ATI_GART_BASE, sc->ag_pdir); 234 235 AGP_FLUSH_TLB(dev); 236 237 return 0; 238 } 239 240 static int 241 agp_ati_detach(device_t dev) 242 { 243 struct agp_ati_softc *sc = device_get_softc(dev); 244 u_int32_t apsize_reg, temp; 245 246 agp_free_cdev(dev); 247 248 if (sc->is_rs300) 249 apsize_reg = ATI_RS300_APSIZE; 250 else 251 apsize_reg = ATI_RS100_APSIZE; 252 253 /* Clear the GATT base */ 254 WRITE4(ATI_GART_BASE, 0); 255 256 /* Put the aperture back the way it started. */ 257 AGP_SET_APERTURE(dev, sc->initial_aperture); 258 259 temp = pci_read_config(dev, apsize_reg, 4); 260 pci_write_config(dev, apsize_reg, temp & ~1, 4); 261 262 kmem_free(sc->ag_vdir, AGP_PAGE_SIZE); 263 kmem_free(sc->ag_virtual, sc->ag_entries * sizeof(uint32_t)); 264 265 bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs); 266 agp_free_res(dev); 267 268 return 0; 269 } 270 271 static u_int32_t 272 agp_ati_get_aperture(device_t dev) 273 { 274 struct agp_ati_softc *sc = device_get_softc(dev); 275 int size_value; 276 277 if (sc->is_rs300) 278 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4); 279 else 280 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4); 281 282 size_value = (size_value & 0x0000000e) >> 1; 283 size_value = (32 * 1024 * 1024) << size_value; 284 285 return size_value; 286 } 287 288 static int 289 agp_ati_set_aperture(device_t dev, u_int32_t aperture) 290 { 291 struct agp_ati_softc *sc = device_get_softc(dev); 292 int size_value; 293 u_int32_t apsize_reg; 294 295 if (sc->is_rs300) 296 apsize_reg = ATI_RS300_APSIZE; 297 else 298 apsize_reg = ATI_RS100_APSIZE; 299 300 size_value = pci_read_config(dev, apsize_reg, 4); 301 302 size_value &= ~0x0000000e; 303 size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1; 304 305 pci_write_config(dev, apsize_reg, size_value, 4); 306 307 return 0; 308 } 309 310 static int 311 agp_ati_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 312 { 313 struct agp_ati_softc *sc = device_get_softc(dev); 314 315 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 316 return EINVAL; 317 318 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1; 319 320 return 0; 321 } 322 323 static int 324 agp_ati_unbind_page(device_t dev, vm_offset_t offset) 325 { 326 struct agp_ati_softc *sc = device_get_softc(dev); 327 328 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT)) 329 return EINVAL; 330 331 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 332 return 0; 333 } 334 335 static void 336 agp_ati_flush_tlb(device_t dev) 337 { 338 struct agp_ati_softc *sc = device_get_softc(dev); 339 340 /* Set the cache invalidate bit and wait for the chipset to clear */ 341 WRITE4(ATI_GART_CACHE_CNTRL, 1); 342 (void)READ4(ATI_GART_CACHE_CNTRL); 343 } 344 345 static device_method_t agp_ati_methods[] = { 346 /* Device interface */ 347 DEVMETHOD(device_probe, agp_ati_probe), 348 DEVMETHOD(device_attach, agp_ati_attach), 349 DEVMETHOD(device_detach, agp_ati_detach), 350 DEVMETHOD(device_shutdown, bus_generic_shutdown), 351 DEVMETHOD(device_suspend, bus_generic_suspend), 352 DEVMETHOD(device_resume, bus_generic_resume), 353 354 /* AGP interface */ 355 DEVMETHOD(agp_get_aperture, agp_ati_get_aperture), 356 DEVMETHOD(agp_set_aperture, agp_ati_set_aperture), 357 DEVMETHOD(agp_bind_page, agp_ati_bind_page), 358 DEVMETHOD(agp_unbind_page, agp_ati_unbind_page), 359 DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb), 360 DEVMETHOD(agp_enable, agp_generic_enable), 361 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 362 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 363 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 364 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 365 { 0, 0 } 366 }; 367 368 static driver_t agp_ati_driver = { 369 "agp", 370 agp_ati_methods, 371 sizeof(struct agp_ati_softc), 372 }; 373 374 DRIVER_MODULE(agp_ati, hostb, agp_ati_driver, 0, 0); 375 MODULE_DEPEND(agp_ati, agp, 1, 1, 1); 376 MODULE_DEPEND(agp_ati, pci, 1, 1, 1); 377