2 * Copyright 2001-2003 SuSE Labs.
3 * Distributed under the GNU public license, v2.
5 * This is a GART driver for the AMD Opteron/Athlon64 on-CPU northbridge.
6 * It also includes support for the AMD 8151 AGP bridge,
7 * although it doesn't actually do much, as all the real
8 * work is done in the northbridge(s).
11 #include <linux/config.h>
12 #include <linux/module.h>
13 #include <linux/pci.h>
14 #include <linux/init.h>
15 #include <linux/agp_backend.h>
18 /* Will need to be increased if AMD64 ever goes >8-way. */
19 #define MAX_HAMMER_GARTS 8
23 #define GPTE_COHERENT 2
25 /* Aperture control register bits. */
27 #define DISGARTCPU (1<<4)
28 #define DISGARTIO (1<<5)
30 /* GART cache control register bits. */
31 #define INVGART (1<<0)
32 #define GARTPTEERR (1<<1)
34 /* K8 On-cpu GART registers */
35 #define AMD64_GARTAPERTURECTL 0x90
36 #define AMD64_GARTAPERTUREBASE 0x94
37 #define AMD64_GARTTABLEBASE 0x98
38 #define AMD64_GARTCACHECTL 0x9c
39 #define AMD64_GARTEN (1<<0)
41 /* NVIDIA K8 registers */
42 #define NVIDIA_X86_64_0_APBASE 0x10
43 #define NVIDIA_X86_64_1_APBASE1 0x50
44 #define NVIDIA_X86_64_1_APLIMIT1 0x54
45 #define NVIDIA_X86_64_1_APSIZE 0xa8
46 #define NVIDIA_X86_64_1_APBASE2 0xd8
47 #define NVIDIA_X86_64_1_APLIMIT2 0xdc
49 /* ULi K8 registers */
50 #define ULI_X86_64_BASE_ADDR 0x10
51 #define ULI_X86_64_HTT_FEA_REG 0x50
52 #define ULI_X86_64_ENU_SCR_REG 0x54
55 static struct pci_dev * hammers[MAX_HAMMER_GARTS];
57 static struct resource *aperture_resource;
58 static int __initdata agp_try_unsupported;
60 static int gart_iterator;
61 #define for_each_nb() for(gart_iterator=0;gart_iterator<nr_garts;gart_iterator++)
63 static void flush_amd64_tlb(struct pci_dev *dev)
67 pci_read_config_dword (dev, AMD64_GARTCACHECTL, &tmp);
69 pci_write_config_dword (dev, AMD64_GARTCACHECTL, tmp);
72 static void amd64_tlbflush(struct agp_memory *temp)
75 flush_amd64_tlb(hammers[gart_iterator]);
78 static int amd64_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
80 int i, j, num_entries;
84 num_entries = agp_num_entries();
86 if (type != 0 || mem->type != 0)
89 /* Make sure we can fit the range in the gatt table. */
90 /* FIXME: could wrap */
91 if (((unsigned long)pg_start + mem->page_count) > num_entries)
96 /* gatt table should be empty. */
97 while (j < (pg_start + mem->page_count)) {
98 if (!PGE_EMPTY(agp_bridge, readl(agp_bridge->gatt_table+j)))
103 if (mem->is_flushed == FALSE) {
104 global_cache_flush();
105 mem->is_flushed = TRUE;
108 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
109 tmp = agp_bridge->driver->mask_memory(agp_bridge,
110 mem->memory[i], mem->type);
112 BUG_ON(tmp & 0xffffff0000000ffcULL);
113 pte = (tmp & 0x000000ff00000000ULL) >> 28;
114 pte |=(tmp & 0x00000000fffff000ULL);
115 pte |= GPTE_VALID | GPTE_COHERENT;
117 writel(pte, agp_bridge->gatt_table+j);
118 readl(agp_bridge->gatt_table+j); /* PCI Posting. */
125 * This hack alters the order element according
126 * to the size of a long. It sucks. I totally disown this, even
127 * though it does appear to work for the most part.
129 static struct aper_size_info_32 amd64_aperture_sizes[7] =
131 {32, 8192, 3+(sizeof(long)/8), 0 },
132 {64, 16384, 4+(sizeof(long)/8), 1<<1 },
133 {128, 32768, 5+(sizeof(long)/8), 1<<2 },
134 {256, 65536, 6+(sizeof(long)/8), 1<<1 | 1<<2 },
135 {512, 131072, 7+(sizeof(long)/8), 1<<3 },
136 {1024, 262144, 8+(sizeof(long)/8), 1<<1 | 1<<3},
137 {2048, 524288, 9+(sizeof(long)/8), 1<<2 | 1<<3}
142 * Get the current Aperture size from the x86-64.
143 * Note, that there may be multiple x86-64's, but we just return
144 * the value from the first one we find. The set_size functions
145 * keep the rest coherent anyway. Or at least should do.
147 static int amd64_fetch_size(void)
152 struct aper_size_info_32 *values;
158 pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &temp);
160 values = A_SIZE_32(amd64_aperture_sizes);
162 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
163 if (temp == values[i].size_value) {
164 agp_bridge->previous_size =
165 agp_bridge->current_size = (void *) (values + i);
167 agp_bridge->aperture_size_idx = i;
168 return values[i].size;
175 * In a multiprocessor x86-64 system, this function gets
176 * called once for each CPU.
178 static u64 amd64_configure (struct pci_dev *hammer, u64 gatt_table)
184 /* Address to map to */
185 pci_read_config_dword (hammer, AMD64_GARTAPERTUREBASE, &tmp);
186 aperturebase = tmp << 25;
187 aper_base = (aperturebase & PCI_BASE_ADDRESS_MEM_MASK);
189 /* address of the mappings table */
190 addr = (u64) gatt_table;
194 pci_write_config_dword (hammer, AMD64_GARTTABLEBASE, tmp);
196 /* Enable GART translation for this hammer. */
197 pci_read_config_dword(hammer, AMD64_GARTAPERTURECTL, &tmp);
199 tmp &= ~(DISGARTCPU | DISGARTIO);
200 pci_write_config_dword(hammer, AMD64_GARTAPERTURECTL, tmp);
202 /* keep CPU's coherent. */
203 flush_amd64_tlb (hammer);
209 static struct aper_size_info_32 amd_8151_sizes[7] =
211 {2048, 524288, 9, 0x00000000 }, /* 0 0 0 0 0 0 */
212 {1024, 262144, 8, 0x00000400 }, /* 1 0 0 0 0 0 */
213 {512, 131072, 7, 0x00000600 }, /* 1 1 0 0 0 0 */
214 {256, 65536, 6, 0x00000700 }, /* 1 1 1 0 0 0 */
215 {128, 32768, 5, 0x00000720 }, /* 1 1 1 1 0 0 */
216 {64, 16384, 4, 0x00000730 }, /* 1 1 1 1 1 0 */
217 {32, 8192, 3, 0x00000738 } /* 1 1 1 1 1 1 */
220 static int amd_8151_configure(void)
222 unsigned long gatt_bus = virt_to_gart(agp_bridge->gatt_table_real);
224 /* Configure AGP regs in each x86-64 host bridge. */
226 agp_bridge->gart_bus_addr =
227 amd64_configure(hammers[gart_iterator],gatt_bus);
233 static void amd64_cleanup(void)
238 /* disable gart translation */
239 pci_read_config_dword (hammers[gart_iterator], AMD64_GARTAPERTURECTL, &tmp);
240 tmp &= ~AMD64_GARTEN;
241 pci_write_config_dword (hammers[gart_iterator], AMD64_GARTAPERTURECTL, tmp);
246 static struct agp_bridge_driver amd_8151_driver = {
247 .owner = THIS_MODULE,
248 .aperture_sizes = amd_8151_sizes,
249 .size_type = U32_APER_SIZE,
250 .num_aperture_sizes = 7,
251 .configure = amd_8151_configure,
252 .fetch_size = amd64_fetch_size,
253 .cleanup = amd64_cleanup,
254 .tlb_flush = amd64_tlbflush,
255 .mask_memory = agp_generic_mask_memory,
257 .agp_enable = agp_generic_enable,
258 .cache_flush = global_cache_flush,
259 .create_gatt_table = agp_generic_create_gatt_table,
260 .free_gatt_table = agp_generic_free_gatt_table,
261 .insert_memory = amd64_insert_memory,
262 .remove_memory = agp_generic_remove_memory,
263 .alloc_by_type = agp_generic_alloc_by_type,
264 .free_by_type = agp_generic_free_by_type,
265 .agp_alloc_page = agp_generic_alloc_page,
266 .agp_destroy_page = agp_generic_destroy_page,
269 /* Some basic sanity checks for the aperture. */
270 static int __devinit aperture_valid(u64 aper, u32 size)
274 printk(KERN_ERR PFX "No aperture\n");
277 if (size < 32*1024*1024) {
278 printk(KERN_ERR PFX "Aperture too small (%d MB)\n", size>>20);
281 if (aper + size > 0xffffffff) {
282 printk(KERN_ERR PFX "Aperture out of bounds\n");
285 pfn = aper >> PAGE_SHIFT;
286 for (c = 0; c < size/PAGE_SIZE; c++) {
287 if (!pfn_valid(pfn + c))
289 if (!PageReserved(pfn_to_page(pfn + c))) {
290 printk(KERN_ERR PFX "Aperture pointing to RAM\n");
295 /* Request the Aperture. This catches cases when someone else
296 already put a mapping in there - happens with some very broken BIOS
298 Maybe better to use pci_assign_resource/pci_enable_device instead
299 trusting the bridges? */
300 if (!aperture_resource &&
301 !(aperture_resource = request_mem_region(aper, size, "aperture"))) {
302 printk(KERN_ERR PFX "Aperture conflicts with PCI mapping.\n");
309 * W*s centric BIOS sometimes only set up the aperture in the AGP
310 * bridge, not the northbridge. On AMD64 this is handled early
311 * in aperture.c, but when GART_IOMMU is not enabled or we run
312 * on a 32bit kernel this needs to be redone.
313 * Unfortunately it is impossible to fix the aperture here because it's too late
314 * to allocate that much memory. But at least error out cleanly instead of
317 static __devinit int fix_northbridge(struct pci_dev *nb, struct pci_dev *agp,
320 u32 aper_low, aper_hi;
323 u32 nb_order, nb_base;
326 pci_read_config_dword(nb, 0x90, &nb_order);
327 nb_order = (nb_order >> 1) & 7;
328 pci_read_config_dword(nb, 0x94, &nb_base);
329 nb_aper = nb_base << 25;
330 if (aperture_valid(nb_aper, (32*1024*1024)<<nb_order)) {
334 /* Northbridge seems to contain crap. Try the AGP bridge. */
336 pci_read_config_word(agp, cap+0x14, &apsize);
337 if (apsize == 0xffff)
341 /* Some BIOS use weird encodings not in the AGPv3 table. */
344 order = 7 - hweight16(apsize);
346 pci_read_config_dword(agp, 0x10, &aper_low);
347 pci_read_config_dword(agp, 0x14, &aper_hi);
348 aper = (aper_low & ~((1<<22)-1)) | ((u64)aper_hi << 32);
349 printk(KERN_INFO PFX "Aperture from AGP @ %Lx size %u MB\n", aper, 32 << order);
350 if (order < 0 || !aperture_valid(aper, (32*1024*1024)<<order))
353 pci_write_config_dword(nb, 0x90, order << 1);
354 pci_write_config_dword(nb, 0x94, aper >> 25);
359 static __devinit int cache_nbs (struct pci_dev *pdev, u32 cap_ptr)
361 struct pci_dev *loop_dev = NULL;
364 /* cache pci_devs of northbridges. */
365 while ((loop_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1103, loop_dev))
367 if (i == MAX_HAMMER_GARTS) {
368 printk(KERN_ERR PFX "Too many northbridges for AGP\n");
371 if (fix_northbridge(loop_dev, pdev, cap_ptr) < 0) {
372 printk(KERN_ERR PFX "No usable aperture found.\n");
374 /* should port this to i386 */
375 printk(KERN_ERR PFX "Consider rebooting with iommu=memaper=2 to get a good aperture.\n");
379 hammers[i++] = loop_dev;
382 return i == 0 ? -1 : 0;
385 /* Handle AMD 8151 quirks */
386 static void __devinit amd8151_init(struct pci_dev *pdev, struct agp_bridge_data *bridge)
391 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
393 case 0x01: revstring="A0"; break;
394 case 0x02: revstring="A1"; break;
395 case 0x11: revstring="B0"; break;
396 case 0x12: revstring="B1"; break;
397 case 0x13: revstring="B2"; break;
398 case 0x14: revstring="B3"; break;
399 default: revstring="??"; break;
402 printk (KERN_INFO PFX "Detected AMD 8151 AGP Bridge rev %s\n", revstring);
405 * Work around errata.
406 * Chips before B2 stepping incorrectly reporting v3.5
409 printk (KERN_INFO PFX "Correcting AGP revision (reports 3.5, is really 3.0)\n");
410 bridge->major_version = 3;
411 bridge->minor_version = 0;
416 static struct aper_size_info_32 uli_sizes[7] =
426 static int __devinit uli_agp_init(struct pci_dev *pdev)
428 u32 httfea,baseaddr,enuscr;
429 struct pci_dev *dev1;
431 unsigned size = amd64_fetch_size();
432 printk(KERN_INFO "Setting up ULi AGP. \n");
433 dev1 = pci_find_slot ((unsigned int)pdev->bus->number,PCI_DEVFN(0,0));
435 printk(KERN_INFO PFX "Detected a ULi chipset, "
436 "but could not fine the secondary device.\n");
440 for (i = 0; i < ARRAY_SIZE(uli_sizes); i++)
441 if (uli_sizes[i].size == size)
444 if (i == ARRAY_SIZE(uli_sizes)) {
445 printk(KERN_INFO PFX "No ULi size found for %d\n", size);
449 /* shadow x86-64 registers into ULi registers */
450 pci_read_config_dword (hammers[0], AMD64_GARTAPERTUREBASE, &httfea);
452 /* if x86-64 aperture base is beyond 4G, exit here */
453 if ((httfea & 0x7fff) >> (32 - 25))
456 httfea = (httfea& 0x7fff) << 25;
458 pci_read_config_dword(pdev, ULI_X86_64_BASE_ADDR, &baseaddr);
459 baseaddr&= ~PCI_BASE_ADDRESS_MEM_MASK;
461 pci_write_config_dword(pdev, ULI_X86_64_BASE_ADDR, baseaddr);
463 enuscr= httfea+ (size * 1024 * 1024) - 1;
464 pci_write_config_dword(dev1, ULI_X86_64_HTT_FEA_REG, httfea);
465 pci_write_config_dword(dev1, ULI_X86_64_ENU_SCR_REG, enuscr);
470 static struct aper_size_info_32 nforce3_sizes[5] =
472 {512, 131072, 7, 0x00000000 },
473 {256, 65536, 6, 0x00000008 },
474 {128, 32768, 5, 0x0000000C },
475 {64, 16384, 4, 0x0000000E },
476 {32, 8192, 3, 0x0000000F }
479 /* Handle shadow device of the Nvidia NForce3 */
480 /* CHECK-ME original 2.4 version set up some IORRs. Check if that is needed. */
481 static int __devinit nforce3_agp_init(struct pci_dev *pdev)
483 u32 tmp, apbase, apbar, aplimit;
484 struct pci_dev *dev1;
486 unsigned size = amd64_fetch_size();
488 printk(KERN_INFO PFX "Setting up Nforce3 AGP.\n");
490 dev1 = pci_find_slot((unsigned int)pdev->bus->number, PCI_DEVFN(11, 0));
492 printk(KERN_INFO PFX "agpgart: Detected an NVIDIA "
493 "nForce3 chipset, but could not find "
494 "the secondary device.\n");
498 for (i = 0; i < ARRAY_SIZE(nforce3_sizes); i++)
499 if (nforce3_sizes[i].size == size)
502 if (i == ARRAY_SIZE(nforce3_sizes)) {
503 printk(KERN_INFO PFX "No NForce3 size found for %d\n", size);
507 pci_read_config_dword(dev1, NVIDIA_X86_64_1_APSIZE, &tmp);
509 tmp |= nforce3_sizes[i].size_value;
510 pci_write_config_dword(dev1, NVIDIA_X86_64_1_APSIZE, tmp);
512 /* shadow x86-64 registers into NVIDIA registers */
513 pci_read_config_dword (hammers[0], AMD64_GARTAPERTUREBASE, &apbase);
515 /* if x86-64 aperture base is beyond 4G, exit here */
516 if ( (apbase & 0x7fff) >> (32 - 25) )
519 apbase = (apbase & 0x7fff) << 25;
521 pci_read_config_dword(pdev, NVIDIA_X86_64_0_APBASE, &apbar);
522 apbar &= ~PCI_BASE_ADDRESS_MEM_MASK;
524 pci_write_config_dword(pdev, NVIDIA_X86_64_0_APBASE, apbar);
526 aplimit = apbase + (size * 1024 * 1024) - 1;
527 pci_write_config_dword(dev1, NVIDIA_X86_64_1_APBASE1, apbase);
528 pci_write_config_dword(dev1, NVIDIA_X86_64_1_APLIMIT1, aplimit);
529 pci_write_config_dword(dev1, NVIDIA_X86_64_1_APBASE2, apbase);
530 pci_write_config_dword(dev1, NVIDIA_X86_64_1_APLIMIT2, aplimit);
535 static int __devinit agp_amd64_probe(struct pci_dev *pdev,
536 const struct pci_device_id *ent)
538 struct agp_bridge_data *bridge;
541 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
545 /* Could check for AGPv3 here */
547 bridge = agp_alloc_bridge();
551 if (pdev->vendor == PCI_VENDOR_ID_AMD &&
552 pdev->device == PCI_DEVICE_ID_AMD_8151_0) {
553 amd8151_init(pdev, bridge);
555 printk(KERN_INFO PFX "Detected AGP bridge %x\n", pdev->devfn);
558 bridge->driver = &amd_8151_driver;
560 bridge->capndx = cap_ptr;
562 /* Fill in the mode register */
563 pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
565 if (cache_nbs(pdev, cap_ptr) == -1) {
566 agp_put_bridge(bridge);
570 if (pdev->vendor == PCI_VENDOR_ID_NVIDIA) {
571 int ret = nforce3_agp_init(pdev);
573 agp_put_bridge(bridge);
578 if (pdev->vendor == PCI_VENDOR_ID_AL) {
579 int ret = uli_agp_init(pdev);
581 agp_put_bridge(bridge);
586 pci_set_drvdata(pdev, bridge);
587 return agp_add_bridge(bridge);
590 static void __devexit agp_amd64_remove(struct pci_dev *pdev)
592 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
594 release_mem_region(virt_to_gart(bridge->gatt_table_real),
595 amd64_aperture_sizes[bridge->aperture_size_idx].size);
596 agp_remove_bridge(bridge);
597 agp_put_bridge(bridge);
600 static struct pci_device_id agp_amd64_pci_table[] = {
602 .class = (PCI_CLASS_BRIDGE_HOST << 8),
604 .vendor = PCI_VENDOR_ID_AMD,
605 .device = PCI_DEVICE_ID_AMD_8151_0,
606 .subvendor = PCI_ANY_ID,
607 .subdevice = PCI_ANY_ID,
611 .class = (PCI_CLASS_BRIDGE_HOST << 8),
613 .vendor = PCI_VENDOR_ID_AL,
614 .device = PCI_DEVICE_ID_AL_M1689,
615 .subvendor = PCI_ANY_ID,
616 .subdevice = PCI_ANY_ID,
620 .class = (PCI_CLASS_BRIDGE_HOST << 8),
622 .vendor = PCI_VENDOR_ID_VIA,
623 .device = PCI_DEVICE_ID_VIA_K8T800PRO_0,
624 .subvendor = PCI_ANY_ID,
625 .subdevice = PCI_ANY_ID,
629 .class = (PCI_CLASS_BRIDGE_HOST << 8),
631 .vendor = PCI_VENDOR_ID_VIA,
632 .device = PCI_DEVICE_ID_VIA_8385_0,
633 .subvendor = PCI_ANY_ID,
634 .subdevice = PCI_ANY_ID,
636 /* VIA K8M800 / K8N800 */
638 .class = (PCI_CLASS_BRIDGE_HOST << 8),
640 .vendor = PCI_VENDOR_ID_VIA,
641 .device = PCI_DEVICE_ID_VIA_8380_0,
642 .subvendor = PCI_ANY_ID,
643 .subdevice = PCI_ANY_ID,
647 .class = (PCI_CLASS_BRIDGE_HOST << 8),
649 .vendor = PCI_VENDOR_ID_VIA,
650 .device = PCI_DEVICE_ID_VIA_3238_0,
651 .subvendor = PCI_ANY_ID,
652 .subdevice = PCI_ANY_ID,
654 /* VIA K8T800/K8M800/K8N800 */
656 .class = (PCI_CLASS_BRIDGE_HOST << 8),
658 .vendor = PCI_VENDOR_ID_VIA,
659 .device = PCI_DEVICE_ID_VIA_838X_1,
660 .subvendor = PCI_ANY_ID,
661 .subdevice = PCI_ANY_ID,
665 .class = (PCI_CLASS_BRIDGE_HOST << 8),
667 .vendor = PCI_VENDOR_ID_NVIDIA,
668 .device = PCI_DEVICE_ID_NVIDIA_NFORCE3,
669 .subvendor = PCI_ANY_ID,
670 .subdevice = PCI_ANY_ID,
673 .class = (PCI_CLASS_BRIDGE_HOST << 8),
675 .vendor = PCI_VENDOR_ID_NVIDIA,
676 .device = PCI_DEVICE_ID_NVIDIA_NFORCE3S,
677 .subvendor = PCI_ANY_ID,
678 .subdevice = PCI_ANY_ID,
682 .class = (PCI_CLASS_BRIDGE_HOST << 8),
684 .vendor = PCI_VENDOR_ID_SI,
685 .device = PCI_DEVICE_ID_SI_755,
686 .subvendor = PCI_ANY_ID,
687 .subdevice = PCI_ANY_ID,
691 .class = (PCI_CLASS_BRIDGE_HOST << 8),
693 .vendor = PCI_VENDOR_ID_SI,
694 .device = PCI_DEVICE_ID_SI_760,
695 .subvendor = PCI_ANY_ID,
696 .subdevice = PCI_ANY_ID,
701 MODULE_DEVICE_TABLE(pci, agp_amd64_pci_table);
703 static struct pci_driver agp_amd64_pci_driver = {
704 .name = "agpgart-amd64",
705 .id_table = agp_amd64_pci_table,
706 .probe = agp_amd64_probe,
707 .remove = agp_amd64_remove,
711 /* Not static due to IOMMU code calling it early. */
712 int __init agp_amd64_init(void)
715 static struct pci_device_id amd64nb[] = {
716 { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1103) },
722 if (pci_register_driver(&agp_amd64_pci_driver) > 0) {
724 if (!agp_try_unsupported && !agp_try_unsupported_boot) {
725 printk(KERN_INFO PFX "No supported AGP bridge found.\n");
727 printk(KERN_INFO PFX "You can try agp_try_unsupported=1\n");
729 printk(KERN_INFO PFX "You can boot with agp=try_unsupported\n");
734 /* First check that we have at least one AMD64 NB */
735 if (!pci_dev_present(amd64nb))
738 /* Look for any AGP bridge */
741 for_each_pci_dev(dev) {
742 if (!pci_find_capability(dev, PCI_CAP_ID_AGP))
744 /* Only one bridge supported right now */
745 if (agp_amd64_probe(dev, NULL) == 0) {
754 static void __exit agp_amd64_cleanup(void)
756 if (aperture_resource)
757 release_resource(aperture_resource);
758 pci_unregister_driver(&agp_amd64_pci_driver);
761 /* On AMD64 the PCI driver needs to initialize this driver early
762 for the IOMMU, so it has to be called via a backdoor. */
763 #ifndef CONFIG_GART_IOMMU
764 module_init(agp_amd64_init);
765 module_exit(agp_amd64_cleanup);
768 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>, Andi Kleen");
769 module_param(agp_try_unsupported, bool, 0);
770 MODULE_LICENSE("GPL");