1 /* 2 * Nvidia AGPGART routines. 3 * Based upon a 2.4 agpgart diff by the folks from NVIDIA, and hacked up 4 * to work in 2.5 by Dave Jones. 5 */ 6 7 #include <linux/module.h> 8 #include <linux/pci.h> 9 #include <linux/init.h> 10 #include <linux/agp_backend.h> 11 #include <linux/page-flags.h> 12 #include <linux/mm.h> 13 #include <linux/jiffies.h> 14 #include "agp.h" 15 16 /* NVIDIA registers */ 17 #define NVIDIA_0_APSIZE 0x80 18 #define NVIDIA_1_WBC 0xf0 19 #define NVIDIA_2_GARTCTRL 0xd0 20 #define NVIDIA_2_APBASE 0xd8 21 #define NVIDIA_2_APLIMIT 0xdc 22 #define NVIDIA_2_ATTBASE(i) (0xe0 + (i) * 4) 23 #define NVIDIA_3_APBASE 0x50 24 #define NVIDIA_3_APLIMIT 0x54 25 26 27 static struct _nvidia_private { 28 struct pci_dev *dev_1; 29 struct pci_dev *dev_2; 30 struct pci_dev *dev_3; 31 volatile u32 __iomem *aperture; 32 int num_active_entries; 33 off_t pg_offset; 34 u32 wbc_mask; 35 } nvidia_private; 36 37 38 static int nvidia_fetch_size(void) 39 { 40 int i; 41 u8 size_value; 42 struct aper_size_info_8 *values; 43 44 pci_read_config_byte(agp_bridge->dev, NVIDIA_0_APSIZE, &size_value); 45 size_value &= 0x0f; 46 values = A_SIZE_8(agp_bridge->driver->aperture_sizes); 47 48 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 49 if (size_value == values[i].size_value) { 50 agp_bridge->previous_size = 51 agp_bridge->current_size = (void *) (values + i); 52 agp_bridge->aperture_size_idx = i; 53 return values[i].size; 54 } 55 } 56 57 return 0; 58 } 59 60 #define SYSCFG 0xC0010010 61 #define IORR_BASE0 0xC0010016 62 #define IORR_MASK0 0xC0010017 63 #define AMD_K7_NUM_IORR 2 64 65 static int nvidia_init_iorr(u32 base, u32 size) 66 { 67 u32 base_hi, base_lo; 68 u32 mask_hi, mask_lo; 69 u32 sys_hi, sys_lo; 70 u32 iorr_addr, free_iorr_addr; 71 72 /* Find the iorr that is already used for the base */ 73 /* If not found, determine the uppermost available iorr */ 74 free_iorr_addr = AMD_K7_NUM_IORR; 75 for (iorr_addr = 0; iorr_addr < AMD_K7_NUM_IORR; iorr_addr++) { 76 rdmsr(IORR_BASE0 + 2 * iorr_addr, base_lo, base_hi); 77 rdmsr(IORR_MASK0 + 2 * iorr_addr, mask_lo, mask_hi); 78 79 if ((base_lo & 0xfffff000) == (base & 0xfffff000)) 80 break; 81 82 if ((mask_lo & 0x00000800) == 0) 83 free_iorr_addr = iorr_addr; 84 } 85 86 if (iorr_addr >= AMD_K7_NUM_IORR) { 87 iorr_addr = free_iorr_addr; 88 if (iorr_addr >= AMD_K7_NUM_IORR) 89 return -EINVAL; 90 } 91 base_hi = 0x0; 92 base_lo = (base & ~0xfff) | 0x18; 93 mask_hi = 0xf; 94 mask_lo = ((~(size - 1)) & 0xfffff000) | 0x800; 95 wrmsr(IORR_BASE0 + 2 * iorr_addr, base_lo, base_hi); 96 wrmsr(IORR_MASK0 + 2 * iorr_addr, mask_lo, mask_hi); 97 98 rdmsr(SYSCFG, sys_lo, sys_hi); 99 sys_lo |= 0x00100000; 100 wrmsr(SYSCFG, sys_lo, sys_hi); 101 102 return 0; 103 } 104 105 static int nvidia_configure(void) 106 { 107 int i, rc, num_dirs; 108 u32 apbase, aplimit; 109 phys_addr_t apbase_phys; 110 struct aper_size_info_8 *current_size; 111 u32 temp; 112 113 current_size = A_SIZE_8(agp_bridge->current_size); 114 115 /* aperture size */ 116 pci_write_config_byte(agp_bridge->dev, NVIDIA_0_APSIZE, 117 current_size->size_value); 118 119 /* address to map to */ 120 apbase = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR); 121 agp_bridge->gart_bus_addr = apbase; 122 aplimit = apbase + (current_size->size * 1024 * 1024) - 1; 123 pci_write_config_dword(nvidia_private.dev_2, NVIDIA_2_APBASE, apbase); 124 pci_write_config_dword(nvidia_private.dev_2, NVIDIA_2_APLIMIT, aplimit); 125 pci_write_config_dword(nvidia_private.dev_3, NVIDIA_3_APBASE, apbase); 126 pci_write_config_dword(nvidia_private.dev_3, NVIDIA_3_APLIMIT, aplimit); 127 if (0 != (rc = nvidia_init_iorr(apbase, current_size->size * 1024 * 1024))) 128 return rc; 129 130 /* directory size is 64k */ 131 num_dirs = current_size->size / 64; 132 nvidia_private.num_active_entries = current_size->num_entries; 133 nvidia_private.pg_offset = 0; 134 if (num_dirs == 0) { 135 num_dirs = 1; 136 nvidia_private.num_active_entries /= (64 / current_size->size); 137 nvidia_private.pg_offset = (apbase & (64 * 1024 * 1024 - 1) & 138 ~(current_size->size * 1024 * 1024 - 1)) / PAGE_SIZE; 139 } 140 141 /* attbase */ 142 for (i = 0; i < 8; i++) { 143 pci_write_config_dword(nvidia_private.dev_2, NVIDIA_2_ATTBASE(i), 144 (agp_bridge->gatt_bus_addr + (i % num_dirs) * 64 * 1024) | 1); 145 } 146 147 /* gtlb control */ 148 pci_read_config_dword(nvidia_private.dev_2, NVIDIA_2_GARTCTRL, &temp); 149 pci_write_config_dword(nvidia_private.dev_2, NVIDIA_2_GARTCTRL, temp | 0x11); 150 151 /* gart control */ 152 pci_read_config_dword(agp_bridge->dev, NVIDIA_0_APSIZE, &temp); 153 pci_write_config_dword(agp_bridge->dev, NVIDIA_0_APSIZE, temp | 0x100); 154 155 /* map aperture */ 156 apbase_phys = pci_resource_start(agp_bridge->dev, AGP_APERTURE_BAR); 157 nvidia_private.aperture = 158 (volatile u32 __iomem *) ioremap(apbase_phys, 33 * PAGE_SIZE); 159 160 if (!nvidia_private.aperture) 161 return -ENOMEM; 162 163 return 0; 164 } 165 166 static void nvidia_cleanup(void) 167 { 168 struct aper_size_info_8 *previous_size; 169 u32 temp; 170 171 /* gart control */ 172 pci_read_config_dword(agp_bridge->dev, NVIDIA_0_APSIZE, &temp); 173 pci_write_config_dword(agp_bridge->dev, NVIDIA_0_APSIZE, temp & ~(0x100)); 174 175 /* gtlb control */ 176 pci_read_config_dword(nvidia_private.dev_2, NVIDIA_2_GARTCTRL, &temp); 177 pci_write_config_dword(nvidia_private.dev_2, NVIDIA_2_GARTCTRL, temp & ~(0x11)); 178 179 /* unmap aperture */ 180 iounmap((void __iomem *) nvidia_private.aperture); 181 182 /* restore previous aperture size */ 183 previous_size = A_SIZE_8(agp_bridge->previous_size); 184 pci_write_config_byte(agp_bridge->dev, NVIDIA_0_APSIZE, 185 previous_size->size_value); 186 187 /* restore iorr for previous aperture size */ 188 nvidia_init_iorr(agp_bridge->gart_bus_addr, 189 previous_size->size * 1024 * 1024); 190 } 191 192 193 /* 194 * Note we can't use the generic routines, even though they are 99% the same. 195 * Aperture sizes <64M still requires a full 64k GART directory, but 196 * only use the portion of the TLB entries that correspond to the apertures 197 * alignment inside the surrounding 64M block. 198 */ 199 extern int agp_memory_reserved; 200 201 static int nvidia_insert_memory(struct agp_memory *mem, off_t pg_start, int type) 202 { 203 int i, j; 204 int mask_type; 205 206 mask_type = agp_generic_type_to_mask_type(mem->bridge, type); 207 if (mask_type != 0 || type != mem->type) 208 return -EINVAL; 209 210 if (mem->page_count == 0) 211 return 0; 212 213 if ((pg_start + mem->page_count) > 214 (nvidia_private.num_active_entries - agp_memory_reserved/PAGE_SIZE)) 215 return -EINVAL; 216 217 for (j = pg_start; j < (pg_start + mem->page_count); j++) { 218 if (!PGE_EMPTY(agp_bridge, readl(agp_bridge->gatt_table+nvidia_private.pg_offset+j))) 219 return -EBUSY; 220 } 221 222 if (!mem->is_flushed) { 223 global_cache_flush(); 224 mem->is_flushed = true; 225 } 226 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 227 writel(agp_bridge->driver->mask_memory(agp_bridge, 228 page_to_phys(mem->pages[i]), mask_type), 229 agp_bridge->gatt_table+nvidia_private.pg_offset+j); 230 } 231 232 /* PCI Posting. */ 233 readl(agp_bridge->gatt_table+nvidia_private.pg_offset+j - 1); 234 235 agp_bridge->driver->tlb_flush(mem); 236 return 0; 237 } 238 239 240 static int nvidia_remove_memory(struct agp_memory *mem, off_t pg_start, int type) 241 { 242 int i; 243 244 int mask_type; 245 246 mask_type = agp_generic_type_to_mask_type(mem->bridge, type); 247 if (mask_type != 0 || type != mem->type) 248 return -EINVAL; 249 250 if (mem->page_count == 0) 251 return 0; 252 253 for (i = pg_start; i < (mem->page_count + pg_start); i++) 254 writel(agp_bridge->scratch_page, agp_bridge->gatt_table+nvidia_private.pg_offset+i); 255 256 agp_bridge->driver->tlb_flush(mem); 257 return 0; 258 } 259 260 261 static void nvidia_tlbflush(struct agp_memory *mem) 262 { 263 unsigned long end; 264 u32 wbc_reg, temp; 265 int i; 266 267 /* flush chipset */ 268 if (nvidia_private.wbc_mask) { 269 pci_read_config_dword(nvidia_private.dev_1, NVIDIA_1_WBC, &wbc_reg); 270 wbc_reg |= nvidia_private.wbc_mask; 271 pci_write_config_dword(nvidia_private.dev_1, NVIDIA_1_WBC, wbc_reg); 272 273 end = jiffies + 3*HZ; 274 do { 275 pci_read_config_dword(nvidia_private.dev_1, 276 NVIDIA_1_WBC, &wbc_reg); 277 if (time_before_eq(end, jiffies)) { 278 printk(KERN_ERR PFX 279 "TLB flush took more than 3 seconds.\n"); 280 } 281 } while (wbc_reg & nvidia_private.wbc_mask); 282 } 283 284 /* flush TLB entries */ 285 for (i = 0; i < 32 + 1; i++) 286 temp = readl(nvidia_private.aperture+(i * PAGE_SIZE / sizeof(u32))); 287 for (i = 0; i < 32 + 1; i++) 288 temp = readl(nvidia_private.aperture+(i * PAGE_SIZE / sizeof(u32))); 289 } 290 291 292 static const struct aper_size_info_8 nvidia_generic_sizes[5] = 293 { 294 {512, 131072, 7, 0}, 295 {256, 65536, 6, 8}, 296 {128, 32768, 5, 12}, 297 {64, 16384, 4, 14}, 298 /* The 32M mode still requires a 64k gatt */ 299 {32, 16384, 4, 15} 300 }; 301 302 303 static const struct gatt_mask nvidia_generic_masks[] = 304 { 305 { .mask = 1, .type = 0} 306 }; 307 308 309 static const struct agp_bridge_driver nvidia_driver = { 310 .owner = THIS_MODULE, 311 .aperture_sizes = nvidia_generic_sizes, 312 .size_type = U8_APER_SIZE, 313 .num_aperture_sizes = 5, 314 .needs_scratch_page = true, 315 .configure = nvidia_configure, 316 .fetch_size = nvidia_fetch_size, 317 .cleanup = nvidia_cleanup, 318 .tlb_flush = nvidia_tlbflush, 319 .mask_memory = agp_generic_mask_memory, 320 .masks = nvidia_generic_masks, 321 .agp_enable = agp_generic_enable, 322 .cache_flush = global_cache_flush, 323 .create_gatt_table = agp_generic_create_gatt_table, 324 .free_gatt_table = agp_generic_free_gatt_table, 325 .insert_memory = nvidia_insert_memory, 326 .remove_memory = nvidia_remove_memory, 327 .alloc_by_type = agp_generic_alloc_by_type, 328 .free_by_type = agp_generic_free_by_type, 329 .agp_alloc_page = agp_generic_alloc_page, 330 .agp_alloc_pages = agp_generic_alloc_pages, 331 .agp_destroy_page = agp_generic_destroy_page, 332 .agp_destroy_pages = agp_generic_destroy_pages, 333 .agp_type_to_mask_type = agp_generic_type_to_mask_type, 334 }; 335 336 static int agp_nvidia_probe(struct pci_dev *pdev, 337 const struct pci_device_id *ent) 338 { 339 struct agp_bridge_data *bridge; 340 u8 cap_ptr; 341 342 nvidia_private.dev_1 = 343 pci_get_bus_and_slot((unsigned int)pdev->bus->number, PCI_DEVFN(0, 1)); 344 nvidia_private.dev_2 = 345 pci_get_bus_and_slot((unsigned int)pdev->bus->number, PCI_DEVFN(0, 2)); 346 nvidia_private.dev_3 = 347 pci_get_bus_and_slot((unsigned int)pdev->bus->number, PCI_DEVFN(30, 0)); 348 349 if (!nvidia_private.dev_1 || !nvidia_private.dev_2 || !nvidia_private.dev_3) { 350 printk(KERN_INFO PFX "Detected an NVIDIA nForce/nForce2 " 351 "chipset, but could not find the secondary devices.\n"); 352 return -ENODEV; 353 } 354 355 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 356 if (!cap_ptr) 357 return -ENODEV; 358 359 switch (pdev->device) { 360 case PCI_DEVICE_ID_NVIDIA_NFORCE: 361 printk(KERN_INFO PFX "Detected NVIDIA nForce chipset\n"); 362 nvidia_private.wbc_mask = 0x00010000; 363 break; 364 case PCI_DEVICE_ID_NVIDIA_NFORCE2: 365 printk(KERN_INFO PFX "Detected NVIDIA nForce2 chipset\n"); 366 nvidia_private.wbc_mask = 0x80000000; 367 break; 368 default: 369 printk(KERN_ERR PFX "Unsupported NVIDIA chipset (device id: %04x)\n", 370 pdev->device); 371 return -ENODEV; 372 } 373 374 bridge = agp_alloc_bridge(); 375 if (!bridge) 376 return -ENOMEM; 377 378 bridge->driver = &nvidia_driver; 379 bridge->dev_private_data = &nvidia_private, 380 bridge->dev = pdev; 381 bridge->capndx = cap_ptr; 382 383 /* Fill in the mode register */ 384 pci_read_config_dword(pdev, 385 bridge->capndx+PCI_AGP_STATUS, 386 &bridge->mode); 387 388 pci_set_drvdata(pdev, bridge); 389 return agp_add_bridge(bridge); 390 } 391 392 static void agp_nvidia_remove(struct pci_dev *pdev) 393 { 394 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 395 396 agp_remove_bridge(bridge); 397 agp_put_bridge(bridge); 398 } 399 400 #ifdef CONFIG_PM 401 static int agp_nvidia_suspend(struct pci_dev *pdev, pm_message_t state) 402 { 403 pci_save_state(pdev); 404 pci_set_power_state(pdev, PCI_D3hot); 405 406 return 0; 407 } 408 409 static int agp_nvidia_resume(struct pci_dev *pdev) 410 { 411 /* set power state 0 and restore PCI space */ 412 pci_set_power_state(pdev, PCI_D0); 413 pci_restore_state(pdev); 414 415 /* reconfigure AGP hardware again */ 416 nvidia_configure(); 417 418 return 0; 419 } 420 #endif 421 422 423 static struct pci_device_id agp_nvidia_pci_table[] = { 424 { 425 .class = (PCI_CLASS_BRIDGE_HOST << 8), 426 .class_mask = ~0, 427 .vendor = PCI_VENDOR_ID_NVIDIA, 428 .device = PCI_DEVICE_ID_NVIDIA_NFORCE, 429 .subvendor = PCI_ANY_ID, 430 .subdevice = PCI_ANY_ID, 431 }, 432 { 433 .class = (PCI_CLASS_BRIDGE_HOST << 8), 434 .class_mask = ~0, 435 .vendor = PCI_VENDOR_ID_NVIDIA, 436 .device = PCI_DEVICE_ID_NVIDIA_NFORCE2, 437 .subvendor = PCI_ANY_ID, 438 .subdevice = PCI_ANY_ID, 439 }, 440 { } 441 }; 442 443 MODULE_DEVICE_TABLE(pci, agp_nvidia_pci_table); 444 445 static struct pci_driver agp_nvidia_pci_driver = { 446 .name = "agpgart-nvidia", 447 .id_table = agp_nvidia_pci_table, 448 .probe = agp_nvidia_probe, 449 .remove = agp_nvidia_remove, 450 #ifdef CONFIG_PM 451 .suspend = agp_nvidia_suspend, 452 .resume = agp_nvidia_resume, 453 #endif 454 }; 455 456 static int __init agp_nvidia_init(void) 457 { 458 if (agp_off) 459 return -EINVAL; 460 return pci_register_driver(&agp_nvidia_pci_driver); 461 } 462 463 static void __exit agp_nvidia_cleanup(void) 464 { 465 pci_unregister_driver(&agp_nvidia_pci_driver); 466 pci_dev_put(nvidia_private.dev_1); 467 pci_dev_put(nvidia_private.dev_2); 468 pci_dev_put(nvidia_private.dev_3); 469 } 470 471 module_init(agp_nvidia_init); 472 module_exit(agp_nvidia_cleanup); 473 474 MODULE_LICENSE("GPL and additional rights"); 475 MODULE_AUTHOR("NVIDIA Corporation"); 476 477