drivers/char/agp/nvidia-agp.c

   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;
 265         u32 __maybe_unused temp;
 266         int i;
 267
 268         /* flush chipset */
 269         if (nvidia_private.wbc_mask) {
 270                 pci_read_config_dword(nvidia_private.dev_1, NVIDIA_1_WBC, &wbc_reg);
 271                 wbc_reg |= nvidia_private.wbc_mask;
 272                 pci_write_config_dword(nvidia_private.dev_1, NVIDIA_1_WBC, wbc_reg);
 273
 274                 end = jiffies + 3*HZ;
 275                 do {
 276                         pci_read_config_dword(nvidia_private.dev_1,
 277                                         NVIDIA_1_WBC, &wbc_reg);
 278                         if (time_before_eq(end, jiffies)) {
 279                                 printk(KERN_ERR PFX
 280                                     "TLB flush took more than 3 seconds.\n");
 281                         }
 282                 } while (wbc_reg & nvidia_private.wbc_mask);
 283         }
 284
 285         /* flush TLB entries */
 286         for (i = 0; i < 32 + 1; i++)
 287                 temp = readl(nvidia_private.aperture+(i * PAGE_SIZE / sizeof(u32)));
 288         for (i = 0; i < 32 + 1; i++)
 289                 temp = readl(nvidia_private.aperture+(i * PAGE_SIZE / sizeof(u32)));
 290 }
 291
 292
 293 static const struct aper_size_info_8 nvidia_generic_sizes[5] =
 294 {
 295         {512, 131072, 7, 0},
 296         {256, 65536, 6, 8},
 297         {128, 32768, 5, 12},
 298         {64, 16384, 4, 14},
 299         /* The 32M mode still requires a 64k gatt */
 300         {32, 16384, 4, 15}
 301 };
 302
 303
 304 static const struct gatt_mask nvidia_generic_masks[] =
 305 {
 306         { .mask = 1, .type = 0}
 307 };
 308
 309
 310 static const struct agp_bridge_driver nvidia_driver = {
 311         .owner                  = THIS_MODULE,
 312         .aperture_sizes         = nvidia_generic_sizes,
 313         .size_type              = U8_APER_SIZE,
 314         .num_aperture_sizes     = 5,
 315         .needs_scratch_page     = true,
 316         .configure              = nvidia_configure,
 317         .fetch_size             = nvidia_fetch_size,
 318         .cleanup                = nvidia_cleanup,
 319         .tlb_flush              = nvidia_tlbflush,
 320         .mask_memory            = agp_generic_mask_memory,
 321         .masks                  = nvidia_generic_masks,
 322         .agp_enable             = agp_generic_enable,
 323         .cache_flush            = global_cache_flush,
 324         .create_gatt_table      = agp_generic_create_gatt_table,
 325         .free_gatt_table        = agp_generic_free_gatt_table,
 326         .insert_memory          = nvidia_insert_memory,
 327         .remove_memory          = nvidia_remove_memory,
 328         .alloc_by_type          = agp_generic_alloc_by_type,
 329         .free_by_type           = agp_generic_free_by_type,
 330         .agp_alloc_page         = agp_generic_alloc_page,
 331         .agp_alloc_pages        = agp_generic_alloc_pages,
 332         .agp_destroy_page       = agp_generic_destroy_page,
 333         .agp_destroy_pages      = agp_generic_destroy_pages,
 334         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 335 };
 336
 337 static int agp_nvidia_probe(struct pci_dev *pdev,
 338                             const struct pci_device_id *ent)
 339 {
 340         struct agp_bridge_data *bridge;
 341         u8 cap_ptr;
 342
 343         nvidia_private.dev_1 =
 344                 pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
 345                                             (unsigned int)pdev->bus->number,
 346                                             PCI_DEVFN(0, 1));
 347         nvidia_private.dev_2 =
 348                 pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
 349                                             (unsigned int)pdev->bus->number,
 350                                             PCI_DEVFN(0, 2));
 351         nvidia_private.dev_3 =
 352                 pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
 353                                             (unsigned int)pdev->bus->number,
 354                                             PCI_DEVFN(30, 0));
 355
 356         if (!nvidia_private.dev_1 || !nvidia_private.dev_2 || !nvidia_private.dev_3) {
 357                 printk(KERN_INFO PFX "Detected an NVIDIA nForce/nForce2 "
 358                         "chipset, but could not find the secondary devices.\n");
 359                 return -ENODEV;
 360         }
 361
 362         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 363         if (!cap_ptr)
 364                 return -ENODEV;
 365
 366         switch (pdev->device) {
 367         case PCI_DEVICE_ID_NVIDIA_NFORCE:
 368                 printk(KERN_INFO PFX "Detected NVIDIA nForce chipset\n");
 369                 nvidia_private.wbc_mask = 0x00010000;
 370                 break;
 371         case PCI_DEVICE_ID_NVIDIA_NFORCE2:
 372                 printk(KERN_INFO PFX "Detected NVIDIA nForce2 chipset\n");
 373                 nvidia_private.wbc_mask = 0x80000000;
 374                 break;
 375         default:
 376                 printk(KERN_ERR PFX "Unsupported NVIDIA chipset (device id: %04x)\n",
 377                             pdev->device);
 378                 return -ENODEV;
 379         }
 380
 381         bridge = agp_alloc_bridge();
 382         if (!bridge)
 383                 return -ENOMEM;
 384
 385         bridge->driver = &nvidia_driver;
 386         bridge->dev_private_data = &nvidia_private;
 387         bridge->dev = pdev;
 388         bridge->capndx = cap_ptr;
 389
 390         /* Fill in the mode register */
 391         pci_read_config_dword(pdev,
 392                         bridge->capndx+PCI_AGP_STATUS,
 393                         &bridge->mode);
 394
 395         pci_set_drvdata(pdev, bridge);
 396         return agp_add_bridge(bridge);
 397 }
 398
 399 static void agp_nvidia_remove(struct pci_dev *pdev)
 400 {
 401         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 402
 403         agp_remove_bridge(bridge);
 404         agp_put_bridge(bridge);
 405 }
 406
 407 #ifdef CONFIG_PM
 408 static int agp_nvidia_suspend(struct pci_dev *pdev, pm_message_t state)
 409 {
 410         pci_save_state(pdev);
 411         pci_set_power_state(pdev, PCI_D3hot);
 412
 413         return 0;
 414 }
 415
 416 static int agp_nvidia_resume(struct pci_dev *pdev)
 417 {
 418         /* set power state 0 and restore PCI space */
 419         pci_set_power_state(pdev, PCI_D0);
 420         pci_restore_state(pdev);
 421
 422         /* reconfigure AGP hardware again */
 423         nvidia_configure();
 424
 425         return 0;
 426 }
 427 #endif
 428
 429
 430 static const struct pci_device_id agp_nvidia_pci_table[] = {
 431         {
 432         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 433         .class_mask     = ~0,
 434         .vendor         = PCI_VENDOR_ID_NVIDIA,
 435         .device         = PCI_DEVICE_ID_NVIDIA_NFORCE,
 436         .subvendor      = PCI_ANY_ID,
 437         .subdevice      = PCI_ANY_ID,
 438         },
 439         {
 440         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 441         .class_mask     = ~0,
 442         .vendor         = PCI_VENDOR_ID_NVIDIA,
 443         .device         = PCI_DEVICE_ID_NVIDIA_NFORCE2,
 444         .subvendor      = PCI_ANY_ID,
 445         .subdevice      = PCI_ANY_ID,
 446         },
 447         { }
 448 };
 449
 450 MODULE_DEVICE_TABLE(pci, agp_nvidia_pci_table);
 451
 452 static struct pci_driver agp_nvidia_pci_driver = {
 453         .name           = "agpgart-nvidia",
 454         .id_table       = agp_nvidia_pci_table,
 455         .probe          = agp_nvidia_probe,
 456         .remove         = agp_nvidia_remove,
 457 #ifdef CONFIG_PM
 458         .suspend        = agp_nvidia_suspend,
 459         .resume         = agp_nvidia_resume,
 460 #endif
 461 };
 462
 463 static int __init agp_nvidia_init(void)
 464 {
 465         if (agp_off)
 466                 return -EINVAL;
 467         return pci_register_driver(&agp_nvidia_pci_driver);
 468 }
 469
 470 static void __exit agp_nvidia_cleanup(void)
 471 {
 472         pci_unregister_driver(&agp_nvidia_pci_driver);
 473         pci_dev_put(nvidia_private.dev_1);
 474         pci_dev_put(nvidia_private.dev_2);
 475         pci_dev_put(nvidia_private.dev_3);
 476 }
 477
 478 module_init(agp_nvidia_init);
 479 module_exit(agp_nvidia_cleanup);
 480
 481 MODULE_LICENSE("GPL and additional rights");
 482 MODULE_AUTHOR("NVIDIA Corporation");
 483