]> nv-tegra.nvidia Code Review - linux-3.10.git/blob - drivers/char/agp/i460-agp.c
Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart
[linux-3.10.git] / drivers / char / agp / i460-agp.c
1 /*
2  * For documentation on the i460 AGP interface, see Chapter 7 (AGP Subsystem) of
3  * the "Intel 460GTX Chipset Software Developer's Manual":
4  * http://developer.intel.com/design/itanium/downloads/24870401s.htm
5  */
6 /*
7  * 460GX support by Chris Ahna <christopher.j.ahna@intel.com>
8  * Clean up & simplification by David Mosberger-Tang <davidm@hpl.hp.com>
9  */
10 #include <linux/module.h>
11 #include <linux/pci.h>
12 #include <linux/init.h>
13 #include <linux/string.h>
14 #include <linux/slab.h>
15 #include <linux/agp_backend.h>
16
17 #include "agp.h"
18
19 #define INTEL_I460_BAPBASE              0x98
20 #define INTEL_I460_GXBCTL               0xa0
21 #define INTEL_I460_AGPSIZ               0xa2
22 #define INTEL_I460_ATTBASE              0xfe200000
23 #define INTEL_I460_GATT_VALID           (1UL << 24)
24 #define INTEL_I460_GATT_COHERENT        (1UL << 25)
25
26 /*
27  * The i460 can operate with large (4MB) pages, but there is no sane way to support this
28  * within the current kernel/DRM environment, so we disable the relevant code for now.
29  * See also comments in ia64_alloc_page()...
30  */
31 #define I460_LARGE_IO_PAGES             0
32
33 #if I460_LARGE_IO_PAGES
34 # define I460_IO_PAGE_SHIFT             i460.io_page_shift
35 #else
36 # define I460_IO_PAGE_SHIFT             12
37 #endif
38
39 #define I460_IOPAGES_PER_KPAGE          (PAGE_SIZE >> I460_IO_PAGE_SHIFT)
40 #define I460_KPAGES_PER_IOPAGE          (1 << (I460_IO_PAGE_SHIFT - PAGE_SHIFT))
41 #define I460_SRAM_IO_DISABLE            (1 << 4)
42 #define I460_BAPBASE_ENABLE             (1 << 3)
43 #define I460_AGPSIZ_MASK                0x7
44 #define I460_4M_PS                      (1 << 1)
45
46 /* Control bits for Out-Of-GART coherency and Burst Write Combining */
47 #define I460_GXBCTL_OOG         (1UL << 0)
48 #define I460_GXBCTL_BWC         (1UL << 2)
49
50 /*
51  * gatt_table entries are 32-bits wide on the i460; the generic code ought to declare the
52  * gatt_table and gatt_table_real pointers a "void *"...
53  */
54 #define RD_GATT(index)          readl((u32 *) i460.gatt + (index))
55 #define WR_GATT(index, val)     writel((val), (u32 *) i460.gatt + (index))
56 /*
57  * The 460 spec says we have to read the last location written to make sure that all
58  * writes have taken effect
59  */
60 #define WR_FLUSH_GATT(index)    RD_GATT(index)
61
62 #define log2(x)                 ffz(~(x))
63
64 static struct {
65         void *gatt;                             /* ioremap'd GATT area */
66
67         /* i460 supports multiple GART page sizes, so GART pageshift is dynamic: */
68         u8 io_page_shift;
69
70         /* BIOS configures chipset to one of 2 possible apbase values: */
71         u8 dynamic_apbase;
72
73         /* structure for tracking partial use of 4MB GART pages: */
74         struct lp_desc {
75                 unsigned long *alloced_map;     /* bitmap of kernel-pages in use */
76                 int refcount;                   /* number of kernel pages using the large page */
77                 u64 paddr;                      /* physical address of large page */
78         } *lp_desc;
79 } i460;
80
81 static struct aper_size_info_8 i460_sizes[3] =
82 {
83         /*
84          * The 32GB aperture is only available with a 4M GART page size.  Due to the
85          * dynamic GART page size, we can't figure out page_order or num_entries until
86          * runtime.
87          */
88         {32768, 0, 0, 4},
89         {1024, 0, 0, 2},
90         {256, 0, 0, 1}
91 };
92
93 static struct gatt_mask i460_masks[] =
94 {
95         {
96           .mask = INTEL_I460_GATT_VALID | INTEL_I460_GATT_COHERENT,
97           .type = 0
98         }
99 };
100
101 static int i460_fetch_size (void)
102 {
103         int i;
104         u8 temp;
105         struct aper_size_info_8 *values;
106
107         /* Determine the GART page size */
108         pci_read_config_byte(agp_bridge->dev, INTEL_I460_GXBCTL, &temp);
109         i460.io_page_shift = (temp & I460_4M_PS) ? 22 : 12;
110         pr_debug("i460_fetch_size: io_page_shift=%d\n", i460.io_page_shift);
111
112         if (i460.io_page_shift != I460_IO_PAGE_SHIFT) {
113                 printk(KERN_ERR PFX
114                        "I/O (GART) page-size %ZuKB doesn't match expected size %ZuKB\n",
115                        1UL << (i460.io_page_shift - 10), 1UL << (I460_IO_PAGE_SHIFT));
116                 return 0;
117         }
118
119         values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
120
121         pci_read_config_byte(agp_bridge->dev, INTEL_I460_AGPSIZ, &temp);
122
123         /* Exit now if the IO drivers for the GART SRAMS are turned off */
124         if (temp & I460_SRAM_IO_DISABLE) {
125                 printk(KERN_ERR PFX "GART SRAMS disabled on 460GX chipset\n");
126                 printk(KERN_ERR PFX "AGPGART operation not possible\n");
127                 return 0;
128         }
129
130         /* Make sure we don't try to create an 2 ^ 23 entry GATT */
131         if ((i460.io_page_shift == 0) && ((temp & I460_AGPSIZ_MASK) == 4)) {
132                 printk(KERN_ERR PFX "We can't have a 32GB aperture with 4KB GART pages\n");
133                 return 0;
134         }
135
136         /* Determine the proper APBASE register */
137         if (temp & I460_BAPBASE_ENABLE)
138                 i460.dynamic_apbase = INTEL_I460_BAPBASE;
139         else
140                 i460.dynamic_apbase = AGP_APBASE;
141
142         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
143                 /*
144                  * Dynamically calculate the proper num_entries and page_order values for
145                  * the define aperture sizes. Take care not to shift off the end of
146                  * values[i].size.
147                  */
148                 values[i].num_entries = (values[i].size << 8) >> (I460_IO_PAGE_SHIFT - 12);
149                 values[i].page_order = log2((sizeof(u32)*values[i].num_entries) >> PAGE_SHIFT);
150         }
151
152         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
153                 /* Neglect control bits when matching up size_value */
154                 if ((temp & I460_AGPSIZ_MASK) == values[i].size_value) {
155                         agp_bridge->previous_size = agp_bridge->current_size = (void *) (values + i);
156                         agp_bridge->aperture_size_idx = i;
157                         return values[i].size;
158                 }
159         }
160
161         return 0;
162 }
163
164 /* There isn't anything to do here since 460 has no GART TLB. */
165 static void i460_tlb_flush (struct agp_memory *mem)
166 {
167         return;
168 }
169
170 /*
171  * This utility function is needed to prevent corruption of the control bits
172  * which are stored along with the aperture size in 460's AGPSIZ register
173  */
174 static void i460_write_agpsiz (u8 size_value)
175 {
176         u8 temp;
177
178         pci_read_config_byte(agp_bridge->dev, INTEL_I460_AGPSIZ, &temp);
179         pci_write_config_byte(agp_bridge->dev, INTEL_I460_AGPSIZ,
180                               ((temp & ~I460_AGPSIZ_MASK) | size_value));
181 }
182
183 static void i460_cleanup (void)
184 {
185         struct aper_size_info_8 *previous_size;
186
187         previous_size = A_SIZE_8(agp_bridge->previous_size);
188         i460_write_agpsiz(previous_size->size_value);
189
190         if (I460_IO_PAGE_SHIFT > PAGE_SHIFT)
191                 kfree(i460.lp_desc);
192 }
193
194 static int i460_configure (void)
195 {
196         union {
197                 u32 small[2];
198                 u64 large;
199         } temp;
200         size_t size;
201         u8 scratch;
202         struct aper_size_info_8 *current_size;
203
204         temp.large = 0;
205
206         current_size = A_SIZE_8(agp_bridge->current_size);
207         i460_write_agpsiz(current_size->size_value);
208
209         /*
210          * Do the necessary rigmarole to read all eight bytes of APBASE.
211          * This has to be done since the AGP aperture can be above 4GB on
212          * 460 based systems.
213          */
214         pci_read_config_dword(agp_bridge->dev, i460.dynamic_apbase, &(temp.small[0]));
215         pci_read_config_dword(agp_bridge->dev, i460.dynamic_apbase + 4, &(temp.small[1]));
216
217         /* Clear BAR control bits */
218         agp_bridge->gart_bus_addr = temp.large & ~((1UL << 3) - 1);
219
220         pci_read_config_byte(agp_bridge->dev, INTEL_I460_GXBCTL, &scratch);
221         pci_write_config_byte(agp_bridge->dev, INTEL_I460_GXBCTL,
222                               (scratch & 0x02) | I460_GXBCTL_OOG | I460_GXBCTL_BWC);
223
224         /*
225          * Initialize partial allocation trackers if a GART page is bigger than a kernel
226          * page.
227          */
228         if (I460_IO_PAGE_SHIFT > PAGE_SHIFT) {
229                 size = current_size->num_entries * sizeof(i460.lp_desc[0]);
230                 i460.lp_desc = kzalloc(size, GFP_KERNEL);
231                 if (!i460.lp_desc)
232                         return -ENOMEM;
233         }
234         return 0;
235 }
236
237 static int i460_create_gatt_table (struct agp_bridge_data *bridge)
238 {
239         int page_order, num_entries, i;
240         void *temp;
241
242         /*
243          * Load up the fixed address of the GART SRAMS which hold our GATT table.
244          */
245         temp = agp_bridge->current_size;
246         page_order = A_SIZE_8(temp)->page_order;
247         num_entries = A_SIZE_8(temp)->num_entries;
248
249         i460.gatt = ioremap(INTEL_I460_ATTBASE, PAGE_SIZE << page_order);
250
251         /* These are no good, the should be removed from the agp_bridge strucure... */
252         agp_bridge->gatt_table_real = NULL;
253         agp_bridge->gatt_table = NULL;
254         agp_bridge->gatt_bus_addr = 0;
255
256         for (i = 0; i < num_entries; ++i)
257                 WR_GATT(i, 0);
258         WR_FLUSH_GATT(i - 1);
259         return 0;
260 }
261
262 static int i460_free_gatt_table (struct agp_bridge_data *bridge)
263 {
264         int num_entries, i;
265         void *temp;
266
267         temp = agp_bridge->current_size;
268
269         num_entries = A_SIZE_8(temp)->num_entries;
270
271         for (i = 0; i < num_entries; ++i)
272                 WR_GATT(i, 0);
273         WR_FLUSH_GATT(num_entries - 1);
274
275         iounmap(i460.gatt);
276         return 0;
277 }
278
279 /*
280  * The following functions are called when the I/O (GART) page size is smaller than
281  * PAGE_SIZE.
282  */
283
284 static int i460_insert_memory_small_io_page (struct agp_memory *mem,
285                                 off_t pg_start, int type)
286 {
287         unsigned long paddr, io_pg_start, io_page_size;
288         int i, j, k, num_entries;
289         void *temp;
290
291         pr_debug("i460_insert_memory_small_io_page(mem=%p, pg_start=%ld, type=%d, paddr0=0x%lx)\n",
292                  mem, pg_start, type, mem->memory[0]);
293
294         io_pg_start = I460_IOPAGES_PER_KPAGE * pg_start;
295
296         temp = agp_bridge->current_size;
297         num_entries = A_SIZE_8(temp)->num_entries;
298
299         if ((io_pg_start + I460_IOPAGES_PER_KPAGE * mem->page_count) > num_entries) {
300                 printk(KERN_ERR PFX "Looks like we're out of AGP memory\n");
301                 return -EINVAL;
302         }
303
304         j = io_pg_start;
305         while (j < (io_pg_start + I460_IOPAGES_PER_KPAGE * mem->page_count)) {
306                 if (!PGE_EMPTY(agp_bridge, RD_GATT(j))) {
307                         pr_debug("i460_insert_memory_small_io_page: GATT[%d]=0x%x is busy\n",
308                                  j, RD_GATT(j));
309                         return -EBUSY;
310                 }
311                 j++;
312         }
313
314         io_page_size = 1UL << I460_IO_PAGE_SHIFT;
315         for (i = 0, j = io_pg_start; i < mem->page_count; i++) {
316                 paddr = mem->memory[i];
317                 for (k = 0; k < I460_IOPAGES_PER_KPAGE; k++, j++, paddr += io_page_size)
318                         WR_GATT(j, agp_bridge->driver->mask_memory(agp_bridge,
319                                 paddr, mem->type));
320         }
321         WR_FLUSH_GATT(j - 1);
322         return 0;
323 }
324
325 static int i460_remove_memory_small_io_page(struct agp_memory *mem,
326                                 off_t pg_start, int type)
327 {
328         int i;
329
330         pr_debug("i460_remove_memory_small_io_page(mem=%p, pg_start=%ld, type=%d)\n",
331                  mem, pg_start, type);
332
333         pg_start = I460_IOPAGES_PER_KPAGE * pg_start;
334
335         for (i = pg_start; i < (pg_start + I460_IOPAGES_PER_KPAGE * mem->page_count); i++)
336                 WR_GATT(i, 0);
337         WR_FLUSH_GATT(i - 1);
338         return 0;
339 }
340
341 #if I460_LARGE_IO_PAGES
342
343 /*
344  * These functions are called when the I/O (GART) page size exceeds PAGE_SIZE.
345  *
346  * This situation is interesting since AGP memory allocations that are smaller than a
347  * single GART page are possible.  The i460.lp_desc array tracks partial allocation of the
348  * large GART pages to work around this issue.
349  *
350  * i460.lp_desc[pg_num].refcount tracks the number of kernel pages in use within GART page
351  * pg_num.  i460.lp_desc[pg_num].paddr is the physical address of the large page and
352  * i460.lp_desc[pg_num].alloced_map is a bitmap of kernel pages that are in use (allocated).
353  */
354
355 static int i460_alloc_large_page (struct lp_desc *lp)
356 {
357         unsigned long order = I460_IO_PAGE_SHIFT - PAGE_SHIFT;
358         size_t map_size;
359         void *lpage;
360
361         lpage = (void *) __get_free_pages(GFP_KERNEL, order);
362         if (!lpage) {
363                 printk(KERN_ERR PFX "Couldn't alloc 4M GART page...\n");
364                 return -ENOMEM;
365         }
366
367         map_size = ((I460_KPAGES_PER_IOPAGE + BITS_PER_LONG - 1) & -BITS_PER_LONG)/8;
368         lp->alloced_map = kzalloc(map_size, GFP_KERNEL);
369         if (!lp->alloced_map) {
370                 free_pages((unsigned long) lpage, order);
371                 printk(KERN_ERR PFX "Out of memory, we're in trouble...\n");
372                 return -ENOMEM;
373         }
374
375         lp->paddr = virt_to_gart(lpage);
376         lp->refcount = 0;
377         atomic_add(I460_KPAGES_PER_IOPAGE, &agp_bridge->current_memory_agp);
378         return 0;
379 }
380
381 static void i460_free_large_page (struct lp_desc *lp)
382 {
383         kfree(lp->alloced_map);
384         lp->alloced_map = NULL;
385
386         free_pages((unsigned long) gart_to_virt(lp->paddr), I460_IO_PAGE_SHIFT - PAGE_SHIFT);
387         atomic_sub(I460_KPAGES_PER_IOPAGE, &agp_bridge->current_memory_agp);
388 }
389
390 static int i460_insert_memory_large_io_page (struct agp_memory *mem,
391                                 off_t pg_start, int type)
392 {
393         int i, start_offset, end_offset, idx, pg, num_entries;
394         struct lp_desc *start, *end, *lp;
395         void *temp;
396
397         temp = agp_bridge->current_size;
398         num_entries = A_SIZE_8(temp)->num_entries;
399
400         /* Figure out what pg_start means in terms of our large GART pages */
401         start           = &i460.lp_desc[pg_start / I460_KPAGES_PER_IOPAGE];
402         end             = &i460.lp_desc[(pg_start + mem->page_count - 1) / I460_KPAGES_PER_IOPAGE];
403         start_offset    = pg_start % I460_KPAGES_PER_IOPAGE;
404         end_offset      = (pg_start + mem->page_count - 1) % I460_KPAGES_PER_IOPAGE;
405
406         if (end > i460.lp_desc + num_entries) {
407                 printk(KERN_ERR PFX "Looks like we're out of AGP memory\n");
408                 return -EINVAL;
409         }
410
411         /* Check if the requested region of the aperture is free */
412         for (lp = start; lp <= end; ++lp) {
413                 if (!lp->alloced_map)
414                         continue;       /* OK, the entire large page is available... */
415
416                 for (idx = ((lp == start) ? start_offset : 0);
417                      idx < ((lp == end) ? (end_offset + 1) : I460_KPAGES_PER_IOPAGE);
418                      idx++)
419                 {
420                         if (test_bit(idx, lp->alloced_map))
421                                 return -EBUSY;
422                 }
423         }
424
425         for (lp = start, i = 0; lp <= end; ++lp) {
426                 if (!lp->alloced_map) {
427                         /* Allocate new GART pages... */
428                         if (i460_alloc_large_page(lp) < 0)
429                                 return -ENOMEM;
430                         pg = lp - i460.lp_desc;
431                         WR_GATT(pg, agp_bridge->driver->mask_memory(agp_bridge,
432                                 lp->paddr, 0));
433                         WR_FLUSH_GATT(pg);
434                 }
435
436                 for (idx = ((lp == start) ? start_offset : 0);
437                      idx < ((lp == end) ? (end_offset + 1) : I460_KPAGES_PER_IOPAGE);
438                      idx++, i++)
439                 {
440                         mem->memory[i] = lp->paddr + idx*PAGE_SIZE;
441                         __set_bit(idx, lp->alloced_map);
442                         ++lp->refcount;
443                 }
444         }
445         return 0;
446 }
447
448 static int i460_remove_memory_large_io_page (struct agp_memory *mem,
449                                 off_t pg_start, int type)
450 {
451         int i, pg, start_offset, end_offset, idx, num_entries;
452         struct lp_desc *start, *end, *lp;
453         void *temp;
454
455         temp = agp_bridge->driver->current_size;
456         num_entries = A_SIZE_8(temp)->num_entries;
457
458         /* Figure out what pg_start means in terms of our large GART pages */
459         start           = &i460.lp_desc[pg_start / I460_KPAGES_PER_IOPAGE];
460         end             = &i460.lp_desc[(pg_start + mem->page_count - 1) / I460_KPAGES_PER_IOPAGE];
461         start_offset    = pg_start % I460_KPAGES_PER_IOPAGE;
462         end_offset      = (pg_start + mem->page_count - 1) % I460_KPAGES_PER_IOPAGE;
463
464         for (i = 0, lp = start; lp <= end; ++lp) {
465                 for (idx = ((lp == start) ? start_offset : 0);
466                      idx < ((lp == end) ? (end_offset + 1) : I460_KPAGES_PER_IOPAGE);
467                      idx++, i++)
468                 {
469                         mem->memory[i] = 0;
470                         __clear_bit(idx, lp->alloced_map);
471                         --lp->refcount;
472                 }
473
474                 /* Free GART pages if they are unused */
475                 if (lp->refcount == 0) {
476                         pg = lp - i460.lp_desc;
477                         WR_GATT(pg, 0);
478                         WR_FLUSH_GATT(pg);
479                         i460_free_large_page(lp);
480                 }
481         }
482         return 0;
483 }
484
485 /* Wrapper routines to call the approriate {small_io_page,large_io_page} function */
486
487 static int i460_insert_memory (struct agp_memory *mem,
488                                 off_t pg_start, int type)
489 {
490         if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT)
491                 return i460_insert_memory_small_io_page(mem, pg_start, type);
492         else
493                 return i460_insert_memory_large_io_page(mem, pg_start, type);
494 }
495
496 static int i460_remove_memory (struct agp_memory *mem,
497                                 off_t pg_start, int type)
498 {
499         if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT)
500                 return i460_remove_memory_small_io_page(mem, pg_start, type);
501         else
502                 return i460_remove_memory_large_io_page(mem, pg_start, type);
503 }
504
505 /*
506  * If the I/O (GART) page size is bigger than the kernel page size, we don't want to
507  * allocate memory until we know where it is to be bound in the aperture (a
508  * multi-kernel-page alloc might fit inside of an already allocated GART page).
509  *
510  * Let's just hope nobody counts on the allocated AGP memory being there before bind time
511  * (I don't think current drivers do)...
512  */
513 static void *i460_alloc_page (struct agp_bridge_data *bridge)
514 {
515         void *page;
516
517         if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT)
518                 page = agp_generic_alloc_page(agp_bridge);
519         else
520                 /* Returning NULL would cause problems */
521                 /* AK: really dubious code. */
522                 page = (void *)~0UL;
523         return page;
524 }
525
526 static void i460_destroy_page (void *page)
527 {
528         if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT)
529                 agp_generic_destroy_page(page);
530 }
531
532 #endif /* I460_LARGE_IO_PAGES */
533
534 static unsigned long i460_mask_memory (struct agp_bridge_data *bridge,
535         unsigned long addr, int type)
536 {
537         /* Make sure the returned address is a valid GATT entry */
538         return bridge->driver->masks[0].mask
539                 | (((addr & ~((1 << I460_IO_PAGE_SHIFT) - 1)) & 0xffffff000) >> 12);
540 }
541
542 struct agp_bridge_driver intel_i460_driver = {
543         .owner                  = THIS_MODULE,
544         .aperture_sizes         = i460_sizes,
545         .size_type              = U8_APER_SIZE,
546         .num_aperture_sizes     = 3,
547         .configure              = i460_configure,
548         .fetch_size             = i460_fetch_size,
549         .cleanup                = i460_cleanup,
550         .tlb_flush              = i460_tlb_flush,
551         .mask_memory            = i460_mask_memory,
552         .masks                  = i460_masks,
553         .agp_enable             = agp_generic_enable,
554         .cache_flush            = global_cache_flush,
555         .create_gatt_table      = i460_create_gatt_table,
556         .free_gatt_table        = i460_free_gatt_table,
557 #if I460_LARGE_IO_PAGES
558         .insert_memory          = i460_insert_memory,
559         .remove_memory          = i460_remove_memory,
560         .agp_alloc_page         = i460_alloc_page,
561         .agp_destroy_page       = i460_destroy_page,
562 #else
563         .insert_memory          = i460_insert_memory_small_io_page,
564         .remove_memory          = i460_remove_memory_small_io_page,
565         .agp_alloc_page         = agp_generic_alloc_page,
566         .agp_destroy_page       = agp_generic_destroy_page,
567 #endif
568         .alloc_by_type          = agp_generic_alloc_by_type,
569         .free_by_type           = agp_generic_free_by_type,
570         .cant_use_aperture      = 1,
571 };
572
573 static int __devinit agp_intel_i460_probe(struct pci_dev *pdev,
574                                           const struct pci_device_id *ent)
575 {
576         struct agp_bridge_data *bridge;
577         u8 cap_ptr;
578
579         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
580         if (!cap_ptr)
581                 return -ENODEV;
582
583         bridge = agp_alloc_bridge();
584         if (!bridge)
585                 return -ENOMEM;
586
587         bridge->driver = &intel_i460_driver;
588         bridge->dev = pdev;
589         bridge->capndx = cap_ptr;
590
591         printk(KERN_INFO PFX "Detected Intel 460GX chipset\n");
592
593         pci_set_drvdata(pdev, bridge);
594         return agp_add_bridge(bridge);
595 }
596
597 static void __devexit agp_intel_i460_remove(struct pci_dev *pdev)
598 {
599         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
600
601         agp_remove_bridge(bridge);
602         agp_put_bridge(bridge);
603 }
604
605 static struct pci_device_id agp_intel_i460_pci_table[] = {
606         {
607         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
608         .class_mask     = ~0,
609         .vendor         = PCI_VENDOR_ID_INTEL,
610         .device         = PCI_DEVICE_ID_INTEL_84460GX,
611         .subvendor      = PCI_ANY_ID,
612         .subdevice      = PCI_ANY_ID,
613         },
614         { }
615 };
616
617 MODULE_DEVICE_TABLE(pci, agp_intel_i460_pci_table);
618
619 static struct pci_driver agp_intel_i460_pci_driver = {
620         .owner          = THIS_MODULE,
621         .name           = "agpgart-intel-i460",
622         .id_table       = agp_intel_i460_pci_table,
623         .probe          = agp_intel_i460_probe,
624         .remove         = __devexit_p(agp_intel_i460_remove),
625 };
626
627 static int __init agp_intel_i460_init(void)
628 {
629         if (agp_off)
630                 return -EINVAL;
631         return pci_register_driver(&agp_intel_i460_pci_driver);
632 }
633
634 static void __exit agp_intel_i460_cleanup(void)
635 {
636         pci_unregister_driver(&agp_intel_i460_pci_driver);
637 }
638
639 module_init(agp_intel_i460_init);
640 module_exit(agp_intel_i460_cleanup);
641
642 MODULE_AUTHOR("Chris Ahna <Christopher.J.Ahna@intel.com>");
643 MODULE_LICENSE("GPL and additional rights");