Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * HP zx1 AGPGART routines. |
| 3 | * |
| 4 | * (c) Copyright 2002, 2003 Hewlett-Packard Development Company, L.P. |
| 5 | * Bjorn Helgaas <bjorn.helgaas@hp.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/acpi.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/pci.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/agp_backend.h> |
| 17 | |
| 18 | #include <asm/acpi-ext.h> |
| 19 | |
| 20 | #include "agp.h" |
| 21 | |
| 22 | #ifndef log2 |
| 23 | #define log2(x) ffz(~(x)) |
| 24 | #endif |
| 25 | |
| 26 | #define HP_ZX1_IOC_OFFSET 0x1000 /* ACPI reports SBA, we want IOC */ |
| 27 | |
| 28 | /* HP ZX1 IOC registers */ |
| 29 | #define HP_ZX1_IBASE 0x300 |
| 30 | #define HP_ZX1_IMASK 0x308 |
| 31 | #define HP_ZX1_PCOM 0x310 |
| 32 | #define HP_ZX1_TCNFG 0x318 |
| 33 | #define HP_ZX1_PDIR_BASE 0x320 |
| 34 | |
| 35 | #define HP_ZX1_IOVA_BASE GB(1UL) |
| 36 | #define HP_ZX1_IOVA_SIZE GB(1UL) |
| 37 | #define HP_ZX1_GART_SIZE (HP_ZX1_IOVA_SIZE / 2) |
| 38 | #define HP_ZX1_SBA_IOMMU_COOKIE 0x0000badbadc0ffeeUL |
| 39 | |
| 40 | #define HP_ZX1_PDIR_VALID_BIT 0x8000000000000000UL |
| 41 | #define HP_ZX1_IOVA_TO_PDIR(va) ((va - hp_private.iova_base) >> hp_private.io_tlb_shift) |
| 42 | |
| 43 | #define AGP8X_MODE_BIT 3 |
| 44 | #define AGP8X_MODE (1 << AGP8X_MODE_BIT) |
| 45 | |
| 46 | /* AGP bridge need not be PCI device, but DRM thinks it is. */ |
| 47 | static struct pci_dev fake_bridge_dev; |
| 48 | |
| 49 | static int hp_zx1_gart_found; |
| 50 | |
| 51 | static struct aper_size_info_fixed hp_zx1_sizes[] = |
| 52 | { |
| 53 | {0, 0, 0}, /* filled in by hp_zx1_fetch_size() */ |
| 54 | }; |
| 55 | |
| 56 | static struct gatt_mask hp_zx1_masks[] = |
| 57 | { |
| 58 | {.mask = HP_ZX1_PDIR_VALID_BIT, .type = 0} |
| 59 | }; |
| 60 | |
| 61 | static struct _hp_private { |
| 62 | volatile u8 __iomem *ioc_regs; |
| 63 | volatile u8 __iomem *lba_regs; |
| 64 | int lba_cap_offset; |
| 65 | u64 *io_pdir; // PDIR for entire IOVA |
| 66 | u64 *gatt; // PDIR just for GART (subset of above) |
| 67 | u64 gatt_entries; |
| 68 | u64 iova_base; |
| 69 | u64 gart_base; |
| 70 | u64 gart_size; |
| 71 | u64 io_pdir_size; |
| 72 | int io_pdir_owner; // do we own it, or share it with sba_iommu? |
| 73 | int io_page_size; |
| 74 | int io_tlb_shift; |
| 75 | int io_tlb_ps; // IOC ps config |
| 76 | int io_pages_per_kpage; |
| 77 | } hp_private; |
| 78 | |
| 79 | static int __init hp_zx1_ioc_shared(void) |
| 80 | { |
| 81 | struct _hp_private *hp = &hp_private; |
| 82 | |
| 83 | printk(KERN_INFO PFX "HP ZX1 IOC: IOPDIR shared with sba_iommu\n"); |
| 84 | |
| 85 | /* |
| 86 | * IOC already configured by sba_iommu module; just use |
| 87 | * its setup. We assume: |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 88 | * - IOVA space is 1Gb in size |
| 89 | * - first 512Mb is IOMMU, second 512Mb is GART |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | */ |
| 91 | hp->io_tlb_ps = readq(hp->ioc_regs+HP_ZX1_TCNFG); |
| 92 | switch (hp->io_tlb_ps) { |
| 93 | case 0: hp->io_tlb_shift = 12; break; |
| 94 | case 1: hp->io_tlb_shift = 13; break; |
| 95 | case 2: hp->io_tlb_shift = 14; break; |
| 96 | case 3: hp->io_tlb_shift = 16; break; |
| 97 | default: |
| 98 | printk(KERN_ERR PFX "Invalid IOTLB page size " |
| 99 | "configuration 0x%x\n", hp->io_tlb_ps); |
| 100 | hp->gatt = NULL; |
| 101 | hp->gatt_entries = 0; |
| 102 | return -ENODEV; |
| 103 | } |
| 104 | hp->io_page_size = 1 << hp->io_tlb_shift; |
| 105 | hp->io_pages_per_kpage = PAGE_SIZE / hp->io_page_size; |
| 106 | |
| 107 | hp->iova_base = readq(hp->ioc_regs+HP_ZX1_IBASE) & ~0x1; |
| 108 | hp->gart_base = hp->iova_base + HP_ZX1_IOVA_SIZE - HP_ZX1_GART_SIZE; |
| 109 | |
| 110 | hp->gart_size = HP_ZX1_GART_SIZE; |
| 111 | hp->gatt_entries = hp->gart_size / hp->io_page_size; |
| 112 | |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 113 | hp->io_pdir = gart_to_virt(readq(hp->ioc_regs+HP_ZX1_PDIR_BASE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | hp->gatt = &hp->io_pdir[HP_ZX1_IOVA_TO_PDIR(hp->gart_base)]; |
| 115 | |
| 116 | if (hp->gatt[0] != HP_ZX1_SBA_IOMMU_COOKIE) { |
| 117 | /* Normal case when no AGP device in system */ |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 118 | hp->gatt = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | hp->gatt_entries = 0; |
| 120 | printk(KERN_ERR PFX "No reserved IO PDIR entry found; " |
| 121 | "GART disabled\n"); |
| 122 | return -ENODEV; |
| 123 | } |
| 124 | |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | static int __init |
| 129 | hp_zx1_ioc_owner (void) |
| 130 | { |
| 131 | struct _hp_private *hp = &hp_private; |
| 132 | |
| 133 | printk(KERN_INFO PFX "HP ZX1 IOC: IOPDIR dedicated to GART\n"); |
| 134 | |
| 135 | /* |
| 136 | * Select an IOV page size no larger than system page size. |
| 137 | */ |
| 138 | if (PAGE_SIZE >= KB(64)) { |
| 139 | hp->io_tlb_shift = 16; |
| 140 | hp->io_tlb_ps = 3; |
| 141 | } else if (PAGE_SIZE >= KB(16)) { |
| 142 | hp->io_tlb_shift = 14; |
| 143 | hp->io_tlb_ps = 2; |
| 144 | } else if (PAGE_SIZE >= KB(8)) { |
| 145 | hp->io_tlb_shift = 13; |
| 146 | hp->io_tlb_ps = 1; |
| 147 | } else { |
| 148 | hp->io_tlb_shift = 12; |
| 149 | hp->io_tlb_ps = 0; |
| 150 | } |
| 151 | hp->io_page_size = 1 << hp->io_tlb_shift; |
| 152 | hp->io_pages_per_kpage = PAGE_SIZE / hp->io_page_size; |
| 153 | |
| 154 | hp->iova_base = HP_ZX1_IOVA_BASE; |
| 155 | hp->gart_size = HP_ZX1_GART_SIZE; |
| 156 | hp->gart_base = hp->iova_base + HP_ZX1_IOVA_SIZE - hp->gart_size; |
| 157 | |
| 158 | hp->gatt_entries = hp->gart_size / hp->io_page_size; |
| 159 | hp->io_pdir_size = (HP_ZX1_IOVA_SIZE / hp->io_page_size) * sizeof(u64); |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | static int __init |
| 165 | hp_zx1_ioc_init (u64 hpa) |
| 166 | { |
| 167 | struct _hp_private *hp = &hp_private; |
| 168 | |
| 169 | hp->ioc_regs = ioremap(hpa, 1024); |
| 170 | if (!hp->ioc_regs) |
| 171 | return -ENOMEM; |
| 172 | |
| 173 | /* |
| 174 | * If the IOTLB is currently disabled, we can take it over. |
| 175 | * Otherwise, we have to share with sba_iommu. |
| 176 | */ |
| 177 | hp->io_pdir_owner = (readq(hp->ioc_regs+HP_ZX1_IBASE) & 0x1) == 0; |
| 178 | |
| 179 | if (hp->io_pdir_owner) |
| 180 | return hp_zx1_ioc_owner(); |
| 181 | |
| 182 | return hp_zx1_ioc_shared(); |
| 183 | } |
| 184 | |
| 185 | static int |
| 186 | hp_zx1_lba_find_capability (volatile u8 __iomem *hpa, int cap) |
| 187 | { |
| 188 | u16 status; |
| 189 | u8 pos, id; |
| 190 | int ttl = 48; |
| 191 | |
| 192 | status = readw(hpa+PCI_STATUS); |
| 193 | if (!(status & PCI_STATUS_CAP_LIST)) |
| 194 | return 0; |
| 195 | pos = readb(hpa+PCI_CAPABILITY_LIST); |
| 196 | while (ttl-- && pos >= 0x40) { |
| 197 | pos &= ~3; |
| 198 | id = readb(hpa+pos+PCI_CAP_LIST_ID); |
| 199 | if (id == 0xff) |
| 200 | break; |
| 201 | if (id == cap) |
| 202 | return pos; |
| 203 | pos = readb(hpa+pos+PCI_CAP_LIST_NEXT); |
| 204 | } |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | static int __init |
| 209 | hp_zx1_lba_init (u64 hpa) |
| 210 | { |
| 211 | struct _hp_private *hp = &hp_private; |
| 212 | int cap; |
| 213 | |
| 214 | hp->lba_regs = ioremap(hpa, 256); |
| 215 | if (!hp->lba_regs) |
| 216 | return -ENOMEM; |
| 217 | |
| 218 | hp->lba_cap_offset = hp_zx1_lba_find_capability(hp->lba_regs, PCI_CAP_ID_AGP); |
| 219 | |
| 220 | cap = readl(hp->lba_regs+hp->lba_cap_offset) & 0xff; |
| 221 | if (cap != PCI_CAP_ID_AGP) { |
| 222 | printk(KERN_ERR PFX "Invalid capability ID 0x%02x at 0x%x\n", |
| 223 | cap, hp->lba_cap_offset); |
| 224 | return -ENODEV; |
| 225 | } |
| 226 | |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static int |
| 231 | hp_zx1_fetch_size(void) |
| 232 | { |
| 233 | int size; |
| 234 | |
| 235 | size = hp_private.gart_size / MB(1); |
| 236 | hp_zx1_sizes[0].size = size; |
| 237 | agp_bridge->current_size = (void *) &hp_zx1_sizes[0]; |
| 238 | return size; |
| 239 | } |
| 240 | |
| 241 | static int |
| 242 | hp_zx1_configure (void) |
| 243 | { |
| 244 | struct _hp_private *hp = &hp_private; |
| 245 | |
| 246 | agp_bridge->gart_bus_addr = hp->gart_base; |
| 247 | agp_bridge->capndx = hp->lba_cap_offset; |
| 248 | agp_bridge->mode = readl(hp->lba_regs+hp->lba_cap_offset+PCI_AGP_STATUS); |
| 249 | |
| 250 | if (hp->io_pdir_owner) { |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 251 | writel(virt_to_gart(hp->io_pdir), hp->ioc_regs+HP_ZX1_PDIR_BASE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | readl(hp->ioc_regs+HP_ZX1_PDIR_BASE); |
| 253 | writel(hp->io_tlb_ps, hp->ioc_regs+HP_ZX1_TCNFG); |
| 254 | readl(hp->ioc_regs+HP_ZX1_TCNFG); |
Peter Chubb | 24b8e0c | 2005-09-15 15:36:35 +1000 | [diff] [blame] | 255 | writel((unsigned int)(~(HP_ZX1_IOVA_SIZE-1)), hp->ioc_regs+HP_ZX1_IMASK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | readl(hp->ioc_regs+HP_ZX1_IMASK); |
| 257 | writel(hp->iova_base|1, hp->ioc_regs+HP_ZX1_IBASE); |
| 258 | readl(hp->ioc_regs+HP_ZX1_IBASE); |
| 259 | writel(hp->iova_base|log2(HP_ZX1_IOVA_SIZE), hp->ioc_regs+HP_ZX1_PCOM); |
| 260 | readl(hp->ioc_regs+HP_ZX1_PCOM); |
| 261 | } |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | static void |
| 267 | hp_zx1_cleanup (void) |
| 268 | { |
| 269 | struct _hp_private *hp = &hp_private; |
| 270 | |
| 271 | if (hp->ioc_regs) { |
| 272 | if (hp->io_pdir_owner) { |
| 273 | writeq(0, hp->ioc_regs+HP_ZX1_IBASE); |
| 274 | readq(hp->ioc_regs+HP_ZX1_IBASE); |
| 275 | } |
| 276 | iounmap(hp->ioc_regs); |
| 277 | } |
| 278 | if (hp->lba_regs) |
| 279 | iounmap(hp->lba_regs); |
| 280 | } |
| 281 | |
| 282 | static void |
| 283 | hp_zx1_tlbflush (struct agp_memory *mem) |
| 284 | { |
| 285 | struct _hp_private *hp = &hp_private; |
| 286 | |
| 287 | writeq(hp->gart_base | log2(hp->gart_size), hp->ioc_regs+HP_ZX1_PCOM); |
| 288 | readq(hp->ioc_regs+HP_ZX1_PCOM); |
| 289 | } |
| 290 | |
| 291 | static int |
| 292 | hp_zx1_create_gatt_table (struct agp_bridge_data *bridge) |
| 293 | { |
| 294 | struct _hp_private *hp = &hp_private; |
| 295 | int i; |
| 296 | |
| 297 | if (hp->io_pdir_owner) { |
| 298 | hp->io_pdir = (u64 *) __get_free_pages(GFP_KERNEL, |
| 299 | get_order(hp->io_pdir_size)); |
| 300 | if (!hp->io_pdir) { |
| 301 | printk(KERN_ERR PFX "Couldn't allocate contiguous " |
| 302 | "memory for I/O PDIR\n"); |
| 303 | hp->gatt = NULL; |
| 304 | hp->gatt_entries = 0; |
| 305 | return -ENOMEM; |
| 306 | } |
| 307 | memset(hp->io_pdir, 0, hp->io_pdir_size); |
| 308 | |
| 309 | hp->gatt = &hp->io_pdir[HP_ZX1_IOVA_TO_PDIR(hp->gart_base)]; |
| 310 | } |
| 311 | |
| 312 | for (i = 0; i < hp->gatt_entries; i++) { |
| 313 | hp->gatt[i] = (unsigned long) agp_bridge->scratch_page; |
| 314 | } |
| 315 | |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | static int |
| 320 | hp_zx1_free_gatt_table (struct agp_bridge_data *bridge) |
| 321 | { |
| 322 | struct _hp_private *hp = &hp_private; |
| 323 | |
| 324 | if (hp->io_pdir_owner) |
| 325 | free_pages((unsigned long) hp->io_pdir, |
| 326 | get_order(hp->io_pdir_size)); |
| 327 | else |
| 328 | hp->gatt[0] = HP_ZX1_SBA_IOMMU_COOKIE; |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | static int |
| 333 | hp_zx1_insert_memory (struct agp_memory *mem, off_t pg_start, int type) |
| 334 | { |
| 335 | struct _hp_private *hp = &hp_private; |
| 336 | int i, k; |
| 337 | off_t j, io_pg_start; |
| 338 | int io_pg_count; |
| 339 | |
| 340 | if (type != 0 || mem->type != 0) { |
| 341 | return -EINVAL; |
| 342 | } |
| 343 | |
| 344 | io_pg_start = hp->io_pages_per_kpage * pg_start; |
| 345 | io_pg_count = hp->io_pages_per_kpage * mem->page_count; |
| 346 | if ((io_pg_start + io_pg_count) > hp->gatt_entries) { |
| 347 | return -EINVAL; |
| 348 | } |
| 349 | |
| 350 | j = io_pg_start; |
| 351 | while (j < (io_pg_start + io_pg_count)) { |
| 352 | if (hp->gatt[j]) { |
| 353 | return -EBUSY; |
| 354 | } |
| 355 | j++; |
| 356 | } |
| 357 | |
| 358 | if (mem->is_flushed == FALSE) { |
| 359 | global_cache_flush(); |
| 360 | mem->is_flushed = TRUE; |
| 361 | } |
| 362 | |
| 363 | for (i = 0, j = io_pg_start; i < mem->page_count; i++) { |
| 364 | unsigned long paddr; |
| 365 | |
| 366 | paddr = mem->memory[i]; |
| 367 | for (k = 0; |
| 368 | k < hp->io_pages_per_kpage; |
| 369 | k++, j++, paddr += hp->io_page_size) { |
| 370 | hp->gatt[j] = |
| 371 | agp_bridge->driver->mask_memory(agp_bridge, |
| 372 | paddr, type); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | agp_bridge->driver->tlb_flush(mem); |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | static int |
| 381 | hp_zx1_remove_memory (struct agp_memory *mem, off_t pg_start, int type) |
| 382 | { |
| 383 | struct _hp_private *hp = &hp_private; |
| 384 | int i, io_pg_start, io_pg_count; |
| 385 | |
| 386 | if (type != 0 || mem->type != 0) { |
| 387 | return -EINVAL; |
| 388 | } |
| 389 | |
| 390 | io_pg_start = hp->io_pages_per_kpage * pg_start; |
| 391 | io_pg_count = hp->io_pages_per_kpage * mem->page_count; |
| 392 | for (i = io_pg_start; i < io_pg_count + io_pg_start; i++) { |
| 393 | hp->gatt[i] = agp_bridge->scratch_page; |
| 394 | } |
| 395 | |
| 396 | agp_bridge->driver->tlb_flush(mem); |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | static unsigned long |
| 401 | hp_zx1_mask_memory (struct agp_bridge_data *bridge, |
| 402 | unsigned long addr, int type) |
| 403 | { |
| 404 | return HP_ZX1_PDIR_VALID_BIT | addr; |
| 405 | } |
| 406 | |
| 407 | static void |
| 408 | hp_zx1_enable (struct agp_bridge_data *bridge, u32 mode) |
| 409 | { |
| 410 | struct _hp_private *hp = &hp_private; |
| 411 | u32 command; |
| 412 | |
| 413 | command = readl(hp->lba_regs+hp->lba_cap_offset+PCI_AGP_STATUS); |
| 414 | command = agp_collect_device_status(bridge, mode, command); |
| 415 | command |= 0x00000100; |
| 416 | |
| 417 | writel(command, hp->lba_regs+hp->lba_cap_offset+PCI_AGP_COMMAND); |
| 418 | |
| 419 | agp_device_command(command, (mode & AGP8X_MODE) != 0); |
| 420 | } |
| 421 | |
| 422 | struct agp_bridge_driver hp_zx1_driver = { |
| 423 | .owner = THIS_MODULE, |
| 424 | .size_type = FIXED_APER_SIZE, |
| 425 | .configure = hp_zx1_configure, |
| 426 | .fetch_size = hp_zx1_fetch_size, |
| 427 | .cleanup = hp_zx1_cleanup, |
| 428 | .tlb_flush = hp_zx1_tlbflush, |
| 429 | .mask_memory = hp_zx1_mask_memory, |
| 430 | .masks = hp_zx1_masks, |
| 431 | .agp_enable = hp_zx1_enable, |
| 432 | .cache_flush = global_cache_flush, |
| 433 | .create_gatt_table = hp_zx1_create_gatt_table, |
| 434 | .free_gatt_table = hp_zx1_free_gatt_table, |
| 435 | .insert_memory = hp_zx1_insert_memory, |
| 436 | .remove_memory = hp_zx1_remove_memory, |
| 437 | .alloc_by_type = agp_generic_alloc_by_type, |
| 438 | .free_by_type = agp_generic_free_by_type, |
| 439 | .agp_alloc_page = agp_generic_alloc_page, |
| 440 | .agp_destroy_page = agp_generic_destroy_page, |
| 441 | .cant_use_aperture = 1, |
| 442 | }; |
| 443 | |
| 444 | static int __init |
| 445 | hp_zx1_setup (u64 ioc_hpa, u64 lba_hpa) |
| 446 | { |
| 447 | struct agp_bridge_data *bridge; |
| 448 | int error = 0; |
| 449 | |
| 450 | error = hp_zx1_ioc_init(ioc_hpa); |
| 451 | if (error) |
| 452 | goto fail; |
| 453 | |
| 454 | error = hp_zx1_lba_init(lba_hpa); |
| 455 | if (error) |
| 456 | goto fail; |
| 457 | |
| 458 | bridge = agp_alloc_bridge(); |
| 459 | if (!bridge) { |
| 460 | error = -ENOMEM; |
| 461 | goto fail; |
| 462 | } |
| 463 | bridge->driver = &hp_zx1_driver; |
| 464 | |
| 465 | fake_bridge_dev.vendor = PCI_VENDOR_ID_HP; |
| 466 | fake_bridge_dev.device = PCI_DEVICE_ID_HP_PCIX_LBA; |
| 467 | bridge->dev = &fake_bridge_dev; |
| 468 | |
| 469 | error = agp_add_bridge(bridge); |
| 470 | fail: |
| 471 | if (error) |
| 472 | hp_zx1_cleanup(); |
| 473 | return error; |
| 474 | } |
| 475 | |
| 476 | static acpi_status __init |
| 477 | zx1_gart_probe (acpi_handle obj, u32 depth, void *context, void **ret) |
| 478 | { |
| 479 | acpi_handle handle, parent; |
| 480 | acpi_status status; |
| 481 | struct acpi_buffer buffer; |
| 482 | struct acpi_device_info *info; |
| 483 | u64 lba_hpa, sba_hpa, length; |
| 484 | int match; |
| 485 | |
| 486 | status = hp_acpi_csr_space(obj, &lba_hpa, &length); |
| 487 | if (ACPI_FAILURE(status)) |
| 488 | return AE_OK; /* keep looking for another bridge */ |
| 489 | |
| 490 | /* Look for an enclosing IOC scope and find its CSR space */ |
| 491 | handle = obj; |
| 492 | do { |
| 493 | buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; |
| 494 | status = acpi_get_object_info(handle, &buffer); |
| 495 | if (ACPI_SUCCESS(status)) { |
| 496 | /* TBD check _CID also */ |
| 497 | info = buffer.pointer; |
| 498 | info->hardware_id.value[sizeof(info->hardware_id)-1] = '\0'; |
| 499 | match = (strcmp(info->hardware_id.value, "HWP0001") == 0); |
Len Brown | 7f04880 | 2006-04-01 23:45:39 -0500 | [diff] [blame] | 500 | kfree(info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | if (match) { |
| 502 | status = hp_acpi_csr_space(handle, &sba_hpa, &length); |
| 503 | if (ACPI_SUCCESS(status)) |
| 504 | break; |
| 505 | else { |
| 506 | printk(KERN_ERR PFX "Detected HP ZX1 " |
| 507 | "AGP LBA but no IOC.\n"); |
| 508 | return AE_OK; |
| 509 | } |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | status = acpi_get_parent(handle, &parent); |
| 514 | handle = parent; |
| 515 | } while (ACPI_SUCCESS(status)); |
| 516 | |
| 517 | if (hp_zx1_setup(sba_hpa + HP_ZX1_IOC_OFFSET, lba_hpa)) |
| 518 | return AE_OK; |
| 519 | |
| 520 | printk(KERN_INFO PFX "Detected HP ZX1 %s AGP chipset (ioc=%lx, lba=%lx)\n", |
| 521 | (char *) context, sba_hpa + HP_ZX1_IOC_OFFSET, lba_hpa); |
| 522 | |
| 523 | hp_zx1_gart_found = 1; |
| 524 | return AE_CTRL_TERMINATE; /* we only support one bridge; quit looking */ |
| 525 | } |
| 526 | |
| 527 | static int __init |
| 528 | agp_hp_init (void) |
| 529 | { |
| 530 | if (agp_off) |
| 531 | return -EINVAL; |
| 532 | |
| 533 | acpi_get_devices("HWP0003", zx1_gart_probe, "HWP0003", NULL); |
| 534 | if (hp_zx1_gart_found) |
| 535 | return 0; |
| 536 | |
| 537 | acpi_get_devices("HWP0007", zx1_gart_probe, "HWP0007", NULL); |
| 538 | if (hp_zx1_gart_found) |
| 539 | return 0; |
| 540 | |
| 541 | return -ENODEV; |
| 542 | } |
| 543 | |
| 544 | static void __exit |
| 545 | agp_hp_cleanup (void) |
| 546 | { |
| 547 | } |
| 548 | |
| 549 | module_init(agp_hp_init); |
| 550 | module_exit(agp_hp_cleanup); |
| 551 | |
| 552 | MODULE_LICENSE("GPL and additional rights"); |