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 <davej@redhat.com> 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 struct aper_size_info_8 *current_size; 110 u32 temp; 111 112 current_size = A_SIZE_8(agp_bridge->current_size); 113 114 /* aperture size */ 115 pci_write_config_byte(agp_bridge->dev, NVIDIA_0_APSIZE, 116 current_size->size_value); 117 118 /* address to map to */ 119 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &apbase); 120 apbase &= PCI_BASE_ADDRESS_MEM_MASK; 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 nvidia_private.aperture = 157 (volatile u32 __iomem *) ioremap(apbase, 33 * PAGE_SIZE); 158 159 if (!nvidia_private.aperture) 160 return -ENOMEM; 161 162 return 0; 163 } 164 165 static void nvidia_cleanup(void) 166 { 167 struct aper_size_info_8 *previous_size; 168 u32 temp; 169 170 /* gart control */ 171 pci_read_config_dword(agp_bridge->dev, NVIDIA_0_APSIZE, &temp); 172 pci_write_config_dword(agp_bridge->dev, NVIDIA_0_APSIZE, temp & ~(0x100)); 173 174 /* gtlb control */ 175 pci_read_config_dword(nvidia_private.dev_2, NVIDIA_2_GARTCTRL, &temp); 176 pci_write_config_dword(nvidia_private.dev_2, NVIDIA_2_GARTCTRL, temp & ~(0x11)); 177 178 /* unmap aperture */ 179 iounmap((void __iomem *) nvidia_private.aperture); 180 181 /* restore previous aperture size */ 182 previous_size = A_SIZE_8(agp_bridge->previous_size); 183 pci_write_config_byte(agp_bridge->dev, NVIDIA_0_APSIZE, 184 previous_size->size_value); 185 186 /* restore iorr for previous aperture size */ 187 nvidia_init_iorr(agp_bridge->gart_bus_addr, 188 previous_size->size * 1024 * 1024); 189 } 190 191 192 /* 193 * Note we can't use the generic routines, even though they are 99% the same. 194 * Aperture sizes <64M still requires a full 64k GART directory, but 195 * only use the portion of the TLB entries that correspond to the apertures 196 * alignment inside the surrounding 64M block. 197 */ 198 extern int agp_memory_reserved; 199 200 static int nvidia_insert_memory(struct agp_memory *mem, off_t pg_start, int type) 201 { 202 int i, j; 203 int mask_type; 204 205 mask_type = agp_generic_type_to_mask_type(mem->bridge, type); 206 if (mask_type != 0 || type != mem->type) 207 return -EINVAL; 208 209 if (mem->page_count == 0) 210 return 0; 211 212 if ((pg_start + mem->page_count) > 213 (nvidia_private.num_active_entries - agp_memory_reserved/PAGE_SIZE)) 214 return -EINVAL; 215 216 for (j = pg_start; j < (pg_start + mem->page_count); j++) { 217 if (!PGE_EMPTY(agp_bridge, readl(agp_bridge->gatt_table+nvidia_private.pg_offset+j))) 218 return -EBUSY; 219 } 220 221 if (!mem->is_flushed) { 222 global_cache_flush(); 223 mem->is_flushed = true; 224 } 225 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 226 writel(agp_bridge->driver->mask_memory(agp_bridge, 227 page_to_phys(mem->pages[i]), mask_type), 228 agp_bridge->gatt_table+nvidia_private.pg_offset+j); 229 } 230 231 /* PCI Posting. */ 232 readl(agp_bridge->gatt_table+nvidia_private.pg_offset+j - 1); 233 234 agp_bridge->driver->tlb_flush(mem); 235 return 0; 236 } 237 238 239 static int nvidia_remove_memory(struct agp_memory *mem, off_t pg_start, int type) 240 { 241 int i; 242 243 int mask_type; 244 245 mask_type = agp_generic_type_to_mask_type(mem->bridge, type); 246 if (mask_type != 0 || type != mem->type) 247 return -EINVAL; 248 249 if (mem->page_count == 0) 250 return 0; 251 252 for (i = pg_start; i < (mem->page_count + pg_start); i++) 253 writel(agp_bridge->scratch_page, agp_bridge->gatt_table+nvidia_private.pg_offset+i); 254 255 agp_bridge->driver->tlb_flush(mem); 256 return 0; 257 } 258 259 260 static void nvidia_tlbflush(struct agp_memory *mem) 261 { 262 unsigned long end; 263 u32 wbc_reg, temp; 264 int i; 265 266 /* flush chipset */ 267 if (nvidia_private.wbc_mask) { 268 pci_read_config_dword(nvidia_private.dev_1, NVIDIA_1_WBC, &wbc_reg); 269 wbc_reg |= nvidia_private.wbc_mask; 270 pci_write_config_dword(nvidia_private.dev_1, NVIDIA_1_WBC, wbc_reg); 271 272 end = jiffies + 3*HZ; 273 do { 274 pci_read_config_dword(nvidia_private.dev_1, 275 NVIDIA_1_WBC, &wbc_reg); 276 if (time_before_eq(end, jiffies)) { 277 printk(KERN_ERR PFX 278 "TLB flush took more than 3 seconds.\n"); 279 } 280 } while (wbc_reg & nvidia_private.wbc_mask); 281 } 282 283 /* flush TLB entries */ 284 for (i = 0; i < 32 + 1; i++) 285 temp = readl(nvidia_private.aperture+(i * PAGE_SIZE / sizeof(u32))); 286 for (i = 0; i < 32 + 1; i++) 287 temp = readl(nvidia_private.aperture+(i * PAGE_SIZE / sizeof(u32))); 288 } 289 290 291 static const struct aper_size_info_8 nvidia_generic_sizes[5] = 292 { 293 {512, 131072, 7, 0}, 294 {256, 65536, 6, 8}, 295 {128, 32768, 5, 12}, 296 {64, 16384, 4, 14}, 297 /* The 32M mode still requires a 64k gatt */ 298 {32, 16384, 4, 15} 299 }; 300 301 302 static const struct gatt_mask nvidia_generic_masks[] = 303 { 304 { .mask = 1, .type = 0} 305 }; 306 307 308 static const struct agp_bridge_driver nvidia_driver = { 309 .owner = THIS_MODULE, 310 .aperture_sizes = nvidia_generic_sizes, 311 .size_type = U8_APER_SIZE, 312 .num_aperture_sizes = 5, 313 .needs_scratch_page = true, 314 .configure = nvidia_configure, 315 .fetch_size = nvidia_fetch_size, 316 .cleanup = nvidia_cleanup, 317 .tlb_flush = nvidia_tlbflush, 318 .mask_memory = agp_generic_mask_memory, 319 .masks = nvidia_generic_masks, 320 .agp_enable = agp_generic_enable, 321 .cache_flush = global_cache_flush, 322 .create_gatt_table = agp_generic_create_gatt_table, 323 .free_gatt_table = agp_generic_free_gatt_table, 324 .insert_memory = nvidia_insert_memory, 325 .remove_memory = nvidia_remove_memory, 326 .alloc_by_type = agp_generic_alloc_by_type, 327 .free_by_type = agp_generic_free_by_type, 328 .agp_alloc_page = agp_generic_alloc_page, 329 .agp_alloc_pages = agp_generic_alloc_pages, 330 .agp_destroy_page = agp_generic_destroy_page, 331 .agp_destroy_pages = agp_generic_destroy_pages, 332 .agp_type_to_mask_type = agp_generic_type_to_mask_type, 333 }; 334 335 static int agp_nvidia_probe(struct pci_dev *pdev, 336 const struct pci_device_id *ent) 337 { 338 struct agp_bridge_data *bridge; 339 u8 cap_ptr; 340 341 nvidia_private.dev_1 = 342 pci_get_bus_and_slot((unsigned int)pdev->bus->number, PCI_DEVFN(0, 1)); 343 nvidia_private.dev_2 = 344 pci_get_bus_and_slot((unsigned int)pdev->bus->number, PCI_DEVFN(0, 2)); 345 nvidia_private.dev_3 = 346 pci_get_bus_and_slot((unsigned int)pdev->bus->number, PCI_DEVFN(30, 0)); 347 348 if (!nvidia_private.dev_1 || !nvidia_private.dev_2 || !nvidia_private.dev_3) { 349 printk(KERN_INFO PFX "Detected an NVIDIA nForce/nForce2 " 350 "chipset, but could not find the secondary devices.\n"); 351 return -ENODEV; 352 } 353 354 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 355 if (!cap_ptr) 356 return -ENODEV; 357 358 switch (pdev->device) { 359 case PCI_DEVICE_ID_NVIDIA_NFORCE: 360 printk(KERN_INFO PFX "Detected NVIDIA nForce chipset\n"); 361 nvidia_private.wbc_mask = 0x00010000; 362 break; 363 case PCI_DEVICE_ID_NVIDIA_NFORCE2: 364 printk(KERN_INFO PFX "Detected NVIDIA nForce2 chipset\n"); 365 nvidia_private.wbc_mask = 0x80000000; 366 break; 367 default: 368 printk(KERN_ERR PFX "Unsupported NVIDIA chipset (device id: %04x)\n", 369 pdev->device); 370 return -ENODEV; 371 } 372 373 bridge = agp_alloc_bridge(); 374 if (!bridge) 375 return -ENOMEM; 376 377 bridge->driver = &nvidia_driver; 378 bridge->dev_private_data = &nvidia_private, 379 bridge->dev = pdev; 380 bridge->capndx = cap_ptr; 381 382 /* Fill in the mode register */ 383 pci_read_config_dword(pdev, 384 bridge->capndx+PCI_AGP_STATUS, 385 &bridge->mode); 386 387 pci_set_drvdata(pdev, bridge); 388 return agp_add_bridge(bridge); 389 } 390 391 static void agp_nvidia_remove(struct pci_dev *pdev) 392 { 393 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 394 395 agp_remove_bridge(bridge); 396 agp_put_bridge(bridge); 397 } 398 399 #ifdef CONFIG_PM 400 static int agp_nvidia_suspend(struct pci_dev *pdev, pm_message_t state) 401 { 402 pci_save_state (pdev); 403 pci_set_power_state (pdev, 3); 404 405 return 0; 406 } 407 408 static int agp_nvidia_resume(struct pci_dev *pdev) 409 { 410 /* set power state 0 and restore PCI space */ 411 pci_set_power_state (pdev, 0); 412 pci_restore_state(pdev); 413 414 /* reconfigure AGP hardware again */ 415 nvidia_configure(); 416 417 return 0; 418 } 419 #endif 420 421 422 static struct pci_device_id agp_nvidia_pci_table[] = { 423 { 424 .class = (PCI_CLASS_BRIDGE_HOST << 8), 425 .class_mask = ~0, 426 .vendor = PCI_VENDOR_ID_NVIDIA, 427 .device = PCI_DEVICE_ID_NVIDIA_NFORCE, 428 .subvendor = PCI_ANY_ID, 429 .subdevice = PCI_ANY_ID, 430 }, 431 { 432 .class = (PCI_CLASS_BRIDGE_HOST << 8), 433 .class_mask = ~0, 434 .vendor = PCI_VENDOR_ID_NVIDIA, 435 .device = PCI_DEVICE_ID_NVIDIA_NFORCE2, 436 .subvendor = PCI_ANY_ID, 437 .subdevice = PCI_ANY_ID, 438 }, 439 { } 440 }; 441 442 MODULE_DEVICE_TABLE(pci, agp_nvidia_pci_table); 443 444 static struct pci_driver agp_nvidia_pci_driver = { 445 .name = "agpgart-nvidia", 446 .id_table = agp_nvidia_pci_table, 447 .probe = agp_nvidia_probe, 448 .remove = agp_nvidia_remove, 449 #ifdef CONFIG_PM 450 .suspend = agp_nvidia_suspend, 451 .resume = agp_nvidia_resume, 452 #endif 453 }; 454 455 static int __init agp_nvidia_init(void) 456 { 457 if (agp_off) 458 return -EINVAL; 459 return pci_register_driver(&agp_nvidia_pci_driver); 460 } 461 462 static void __exit agp_nvidia_cleanup(void) 463 { 464 pci_unregister_driver(&agp_nvidia_pci_driver); 465 pci_dev_put(nvidia_private.dev_1); 466 pci_dev_put(nvidia_private.dev_2); 467 pci_dev_put(nvidia_private.dev_3); 468 } 469 470 module_init(agp_nvidia_init); 471 module_exit(agp_nvidia_cleanup); 472 473 MODULE_LICENSE("GPL and additional rights"); 474 MODULE_AUTHOR("NVIDIA Corporation"); 475 476