Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Transmeta's Efficeon AGPGART driver. | |
6a92a4e0 | 3 | * |
1da177e4 LT |
4 | * Based upon a diff by Linus around November '02. |
5 | * | |
6 | * Ported to the 2.6 kernel by Carlos Puchol <cpglinux@puchol.com> | |
7 | * and H. Peter Anvin <hpa@transmeta.com>. | |
8 | */ | |
9 | ||
10 | /* | |
11 | * NOTE-cpg-040217: | |
6a92a4e0 | 12 | * |
1da177e4 LT |
13 | * - when compiled as a module, after loading the module, |
14 | * it will refuse to unload, indicating it is in use, | |
15 | * when it is not. | |
16 | * - no s3 (suspend to ram) testing. | |
17 | * - tested on the efficeon integrated nothbridge for tens | |
18 | * of iterations of starting x and glxgears. | |
19 | * - tested with radeon 9000 and radeon mobility m9 cards | |
20 | * - tested with c3/c4 enabled (with the mobility m9 card) | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/pci.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/agp_backend.h> | |
27 | #include <linux/gfp.h> | |
28 | #include <linux/page-flags.h> | |
29 | #include <linux/mm.h> | |
30 | #include "agp.h" | |
31 | ||
32 | /* | |
33 | * The real differences to the generic AGP code is | |
34 | * in the GART mappings - a two-level setup with the | |
35 | * first level being an on-chip 64-entry table. | |
36 | * | |
37 | * The page array is filled through the ATTPAGE register | |
38 | * (Aperture Translation Table Page Register) at 0xB8. Bits: | |
39 | * 31:20: physical page address | |
40 | * 11:9: Page Attribute Table Index (PATI) | |
41 | * must match the PAT index for the | |
42 | * mapped pages (the 2nd level page table pages | |
43 | * themselves should be just regular WB-cacheable, | |
44 | * so this is normally zero.) | |
45 | * 8: Present | |
46 | * 7:6: reserved, write as zero | |
47 | * 5:0: GATT directory index: which 1st-level entry | |
6a92a4e0 | 48 | * |
1da177e4 LT |
49 | * The Efficeon AGP spec requires pages to be WB-cacheable |
50 | * but to be explicitly CLFLUSH'd after any changes. | |
51 | */ | |
52 | #define EFFICEON_ATTPAGE 0xb8 | |
53 | #define EFFICEON_L1_SIZE 64 /* Number of PDE pages */ | |
54 | ||
55 | #define EFFICEON_PATI (0 << 9) | |
56 | #define EFFICEON_PRESENT (1 << 8) | |
57 | ||
58 | static struct _efficeon_private { | |
59 | unsigned long l1_table[EFFICEON_L1_SIZE]; | |
60 | } efficeon_private; | |
61 | ||
e5524f35 | 62 | static const struct gatt_mask efficeon_generic_masks[] = |
1da177e4 LT |
63 | { |
64 | {.mask = 0x00000001, .type = 0} | |
65 | }; | |
66 | ||
1f602454 | 67 | /* This function does the same thing as mask_memory() for this chipset... */ |
07613ba2 | 68 | static inline unsigned long efficeon_mask_memory(struct page *page) |
1f602454 | 69 | { |
6a12235c | 70 | unsigned long addr = page_to_phys(page); |
1f602454 PA |
71 | return addr | 0x00000001; |
72 | } | |
73 | ||
e5524f35 | 74 | static const struct aper_size_info_lvl2 efficeon_generic_sizes[4] = |
1da177e4 LT |
75 | { |
76 | {256, 65536, 0}, | |
77 | {128, 32768, 32}, | |
78 | {64, 16384, 48}, | |
79 | {32, 8192, 56} | |
80 | }; | |
81 | ||
82 | /* | |
83 | * Control interfaces are largely identical to | |
84 | * the legacy Intel 440BX.. | |
85 | */ | |
86 | ||
87 | static int efficeon_fetch_size(void) | |
88 | { | |
89 | int i; | |
90 | u16 temp; | |
91 | struct aper_size_info_lvl2 *values; | |
92 | ||
93 | pci_read_config_word(agp_bridge->dev, INTEL_APSIZE, &temp); | |
94 | values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); | |
95 | ||
96 | for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { | |
97 | if (temp == values[i].size_value) { | |
98 | agp_bridge->previous_size = | |
99 | agp_bridge->current_size = (void *) (values + i); | |
100 | agp_bridge->aperture_size_idx = i; | |
101 | return values[i].size; | |
102 | } | |
103 | } | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static void efficeon_tlbflush(struct agp_memory * mem) | |
109 | { | |
110 | printk(KERN_DEBUG PFX "efficeon_tlbflush()\n"); | |
111 | pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x2200); | |
112 | pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x2280); | |
113 | } | |
114 | ||
115 | static void efficeon_cleanup(void) | |
116 | { | |
117 | u16 temp; | |
118 | struct aper_size_info_lvl2 *previous_size; | |
119 | ||
120 | printk(KERN_DEBUG PFX "efficeon_cleanup()\n"); | |
121 | previous_size = A_SIZE_LVL2(agp_bridge->previous_size); | |
122 | pci_read_config_word(agp_bridge->dev, INTEL_NBXCFG, &temp); | |
123 | pci_write_config_word(agp_bridge->dev, INTEL_NBXCFG, temp & ~(1 << 9)); | |
124 | pci_write_config_word(agp_bridge->dev, INTEL_APSIZE, | |
125 | previous_size->size_value); | |
126 | } | |
127 | ||
128 | static int efficeon_configure(void) | |
129 | { | |
130 | u32 temp; | |
131 | u16 temp2; | |
132 | struct aper_size_info_lvl2 *current_size; | |
133 | ||
134 | printk(KERN_DEBUG PFX "efficeon_configure()\n"); | |
6a92a4e0 | 135 | |
1da177e4 LT |
136 | current_size = A_SIZE_LVL2(agp_bridge->current_size); |
137 | ||
138 | /* aperture size */ | |
139 | pci_write_config_word(agp_bridge->dev, INTEL_APSIZE, | |
140 | current_size->size_value); | |
141 | ||
142 | /* address to map to */ | |
143 | pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); | |
144 | agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); | |
145 | ||
146 | /* agpctrl */ | |
147 | pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x2280); | |
148 | ||
149 | /* paccfg/nbxcfg */ | |
150 | pci_read_config_word(agp_bridge->dev, INTEL_NBXCFG, &temp2); | |
151 | pci_write_config_word(agp_bridge->dev, INTEL_NBXCFG, | |
152 | (temp2 & ~(1 << 10)) | (1 << 9) | (1 << 11)); | |
153 | /* clear any possible error conditions */ | |
154 | pci_write_config_byte(agp_bridge->dev, INTEL_ERRSTS + 1, 7); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static int efficeon_free_gatt_table(struct agp_bridge_data *bridge) | |
159 | { | |
160 | int index, freed = 0; | |
161 | ||
162 | for (index = 0; index < EFFICEON_L1_SIZE; index++) { | |
163 | unsigned long page = efficeon_private.l1_table[index]; | |
164 | if (page) { | |
165 | efficeon_private.l1_table[index] = 0; | |
166 | ClearPageReserved(virt_to_page((char *)page)); | |
167 | free_page(page); | |
168 | freed++; | |
169 | } | |
170 | printk(KERN_DEBUG PFX "efficeon_free_gatt_table(%p, %02x, %08x)\n", | |
171 | agp_bridge->dev, EFFICEON_ATTPAGE, index); | |
172 | pci_write_config_dword(agp_bridge->dev, | |
173 | EFFICEON_ATTPAGE, index); | |
174 | } | |
175 | printk(KERN_DEBUG PFX "efficeon_free_gatt_table() freed %d pages\n", freed); | |
176 | return 0; | |
177 | } | |
178 | ||
179 | ||
180 | /* | |
d6e05edc | 181 | * Since we don't need contiguous memory we just try |
1da177e4 LT |
182 | * to get the gatt table once |
183 | */ | |
184 | ||
185 | #define GET_PAGE_DIR_OFF(addr) (addr >> 22) | |
186 | #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ | |
187 | GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) | |
188 | #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) | |
189 | #undef GET_GATT | |
190 | #define GET_GATT(addr) (efficeon_private.gatt_pages[\ | |
191 | GET_PAGE_DIR_IDX(addr)]->remapped) | |
192 | ||
193 | static int efficeon_create_gatt_table(struct agp_bridge_data *bridge) | |
194 | { | |
195 | int index; | |
196 | const int pati = EFFICEON_PATI; | |
197 | const int present = EFFICEON_PRESENT; | |
198 | const int clflush_chunk = ((cpuid_ebx(1) >> 8) & 0xff) << 3; | |
199 | int num_entries, l1_pages; | |
6a92a4e0 | 200 | |
1da177e4 LT |
201 | num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; |
202 | ||
203 | printk(KERN_DEBUG PFX "efficeon_create_gatt_table(%d)\n", num_entries); | |
204 | ||
205 | /* There are 2^10 PTE pages per PDE page */ | |
206 | BUG_ON(num_entries & 0x3ff); | |
207 | l1_pages = num_entries >> 10; | |
208 | ||
209 | for (index = 0 ; index < l1_pages ; index++) { | |
210 | int offset; | |
211 | unsigned long page; | |
212 | unsigned long value; | |
213 | ||
214 | page = efficeon_private.l1_table[index]; | |
215 | BUG_ON(page); | |
216 | ||
217 | page = get_zeroed_page(GFP_KERNEL); | |
218 | if (!page) { | |
219 | efficeon_free_gatt_table(agp_bridge); | |
220 | return -ENOMEM; | |
221 | } | |
222 | SetPageReserved(virt_to_page((char *)page)); | |
223 | ||
224 | for (offset = 0; offset < PAGE_SIZE; offset += clflush_chunk) | |
6619a8fb | 225 | clflush((char *)page+offset); |
1da177e4 LT |
226 | |
227 | efficeon_private.l1_table[index] = page; | |
228 | ||
6a12235c | 229 | value = virt_to_phys((unsigned long *)page) | pati | present | index; |
1da177e4 LT |
230 | |
231 | pci_write_config_dword(agp_bridge->dev, | |
232 | EFFICEON_ATTPAGE, value); | |
233 | } | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | static int efficeon_insert_memory(struct agp_memory * mem, off_t pg_start, int type) | |
239 | { | |
240 | int i, count = mem->page_count, num_entries; | |
241 | unsigned int *page, *last_page; | |
242 | const int clflush_chunk = ((cpuid_ebx(1) >> 8) & 0xff) << 3; | |
243 | const unsigned long clflush_mask = ~(clflush_chunk-1); | |
244 | ||
245 | printk(KERN_DEBUG PFX "efficeon_insert_memory(%lx, %d)\n", pg_start, count); | |
246 | ||
247 | num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; | |
248 | if ((pg_start + mem->page_count) > num_entries) | |
249 | return -EINVAL; | |
250 | if (type != 0 || mem->type != 0) | |
251 | return -EINVAL; | |
252 | ||
c7258012 | 253 | if (!mem->is_flushed) { |
1da177e4 | 254 | global_cache_flush(); |
c7258012 | 255 | mem->is_flushed = true; |
1da177e4 LT |
256 | } |
257 | ||
258 | last_page = NULL; | |
259 | for (i = 0; i < count; i++) { | |
260 | int index = pg_start + i; | |
07613ba2 | 261 | unsigned long insert = efficeon_mask_memory(mem->pages[i]); |
1da177e4 LT |
262 | |
263 | page = (unsigned int *) efficeon_private.l1_table[index >> 10]; | |
264 | ||
265 | if (!page) | |
266 | continue; | |
6a92a4e0 | 267 | |
1da177e4 LT |
268 | page += (index & 0x3ff); |
269 | *page = insert; | |
270 | ||
271 | /* clflush is slow, so don't clflush until we have to */ | |
6619a8fb PA |
272 | if (last_page && |
273 | (((unsigned long)page^(unsigned long)last_page) & | |
274 | clflush_mask)) | |
275 | clflush(last_page); | |
1da177e4 LT |
276 | |
277 | last_page = page; | |
278 | } | |
279 | ||
280 | if ( last_page ) | |
6619a8fb | 281 | clflush(last_page); |
1da177e4 LT |
282 | |
283 | agp_bridge->driver->tlb_flush(mem); | |
284 | return 0; | |
285 | } | |
286 | ||
287 | static int efficeon_remove_memory(struct agp_memory * mem, off_t pg_start, int type) | |
288 | { | |
289 | int i, count = mem->page_count, num_entries; | |
290 | ||
291 | printk(KERN_DEBUG PFX "efficeon_remove_memory(%lx, %d)\n", pg_start, count); | |
292 | ||
293 | num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; | |
294 | ||
295 | if ((pg_start + mem->page_count) > num_entries) | |
296 | return -EINVAL; | |
297 | if (type != 0 || mem->type != 0) | |
298 | return -EINVAL; | |
299 | ||
300 | for (i = 0; i < count; i++) { | |
301 | int index = pg_start + i; | |
302 | unsigned int *page = (unsigned int *) efficeon_private.l1_table[index >> 10]; | |
303 | ||
304 | if (!page) | |
305 | continue; | |
306 | page += (index & 0x3ff); | |
307 | *page = 0; | |
308 | } | |
309 | agp_bridge->driver->tlb_flush(mem); | |
310 | return 0; | |
311 | } | |
312 | ||
313 | ||
e5524f35 | 314 | static const struct agp_bridge_driver efficeon_driver = { |
1da177e4 LT |
315 | .owner = THIS_MODULE, |
316 | .aperture_sizes = efficeon_generic_sizes, | |
317 | .size_type = LVL2_APER_SIZE, | |
318 | .num_aperture_sizes = 4, | |
319 | .configure = efficeon_configure, | |
320 | .fetch_size = efficeon_fetch_size, | |
321 | .cleanup = efficeon_cleanup, | |
322 | .tlb_flush = efficeon_tlbflush, | |
323 | .mask_memory = agp_generic_mask_memory, | |
324 | .masks = efficeon_generic_masks, | |
325 | .agp_enable = agp_generic_enable, | |
326 | .cache_flush = global_cache_flush, | |
327 | ||
328 | // Efficeon-specific GATT table setup / populate / teardown | |
329 | .create_gatt_table = efficeon_create_gatt_table, | |
330 | .free_gatt_table = efficeon_free_gatt_table, | |
331 | .insert_memory = efficeon_insert_memory, | |
332 | .remove_memory = efficeon_remove_memory, | |
c7258012 | 333 | .cant_use_aperture = false, // true might be faster? |
1da177e4 LT |
334 | |
335 | // Generic | |
336 | .alloc_by_type = agp_generic_alloc_by_type, | |
337 | .free_by_type = agp_generic_free_by_type, | |
338 | .agp_alloc_page = agp_generic_alloc_page, | |
5f310b63 | 339 | .agp_alloc_pages = agp_generic_alloc_pages, |
1da177e4 | 340 | .agp_destroy_page = agp_generic_destroy_page, |
5f310b63 | 341 | .agp_destroy_pages = agp_generic_destroy_pages, |
a030ce44 | 342 | .agp_type_to_mask_type = agp_generic_type_to_mask_type, |
1da177e4 LT |
343 | }; |
344 | ||
1da177e4 LT |
345 | static int __devinit agp_efficeon_probe(struct pci_dev *pdev, |
346 | const struct pci_device_id *ent) | |
347 | { | |
348 | struct agp_bridge_data *bridge; | |
349 | u8 cap_ptr; | |
350 | struct resource *r; | |
351 | ||
352 | cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); | |
353 | if (!cap_ptr) | |
354 | return -ENODEV; | |
355 | ||
356 | /* Probe for Efficeon controller */ | |
357 | if (pdev->device != PCI_DEVICE_ID_EFFICEON) { | |
358 | printk(KERN_ERR PFX "Unsupported Efficeon chipset (device id: %04x)\n", | |
359 | pdev->device); | |
360 | return -ENODEV; | |
361 | } | |
362 | ||
363 | printk(KERN_INFO PFX "Detected Transmeta Efficeon TM8000 series chipset\n"); | |
364 | ||
365 | bridge = agp_alloc_bridge(); | |
366 | if (!bridge) | |
367 | return -ENOMEM; | |
368 | ||
369 | bridge->driver = &efficeon_driver; | |
370 | bridge->dev = pdev; | |
371 | bridge->capndx = cap_ptr; | |
372 | ||
373 | /* | |
374 | * The following fixes the case where the BIOS has "forgotten" to | |
375 | * provide an address range for the GART. | |
376 | * 20030610 - hamish@zot.org | |
377 | */ | |
378 | r = &pdev->resource[0]; | |
379 | if (!r->start && r->end) { | |
6a92a4e0 | 380 | if (pci_assign_resource(pdev, 0)) { |
1da177e4 | 381 | printk(KERN_ERR PFX "could not assign resource 0\n"); |
db7f3ded | 382 | agp_put_bridge(bridge); |
1da177e4 LT |
383 | return -ENODEV; |
384 | } | |
385 | } | |
386 | ||
387 | /* | |
388 | * If the device has not been properly setup, the following will catch | |
389 | * the problem and should stop the system from crashing. | |
390 | * 20030610 - hamish@zot.org | |
391 | */ | |
392 | if (pci_enable_device(pdev)) { | |
393 | printk(KERN_ERR PFX "Unable to Enable PCI device\n"); | |
db7f3ded | 394 | agp_put_bridge(bridge); |
1da177e4 LT |
395 | return -ENODEV; |
396 | } | |
397 | ||
398 | /* Fill in the mode register */ | |
399 | if (cap_ptr) { | |
400 | pci_read_config_dword(pdev, | |
401 | bridge->capndx+PCI_AGP_STATUS, | |
402 | &bridge->mode); | |
403 | } | |
404 | ||
405 | pci_set_drvdata(pdev, bridge); | |
406 | return agp_add_bridge(bridge); | |
407 | } | |
408 | ||
409 | static void __devexit agp_efficeon_remove(struct pci_dev *pdev) | |
410 | { | |
411 | struct agp_bridge_data *bridge = pci_get_drvdata(pdev); | |
412 | ||
413 | agp_remove_bridge(bridge); | |
414 | agp_put_bridge(bridge); | |
415 | } | |
416 | ||
71565619 | 417 | #ifdef CONFIG_PM |
4fd416c1 | 418 | static int agp_efficeon_suspend(struct pci_dev *dev, pm_message_t state) |
1da177e4 LT |
419 | { |
420 | return 0; | |
421 | } | |
422 | ||
71565619 AD |
423 | static int agp_efficeon_resume(struct pci_dev *pdev) |
424 | { | |
425 | printk(KERN_DEBUG PFX "agp_efficeon_resume()\n"); | |
426 | return efficeon_configure(); | |
427 | } | |
428 | #endif | |
1da177e4 LT |
429 | |
430 | static struct pci_device_id agp_efficeon_pci_table[] = { | |
431 | { | |
432 | .class = (PCI_CLASS_BRIDGE_HOST << 8), | |
433 | .class_mask = ~0, | |
434 | .vendor = PCI_VENDOR_ID_TRANSMETA, | |
435 | .device = PCI_ANY_ID, | |
436 | .subvendor = PCI_ANY_ID, | |
437 | .subdevice = PCI_ANY_ID, | |
438 | }, | |
439 | { } | |
440 | }; | |
441 | ||
442 | MODULE_DEVICE_TABLE(pci, agp_efficeon_pci_table); | |
443 | ||
444 | static struct pci_driver agp_efficeon_pci_driver = { | |
445 | .name = "agpgart-efficeon", | |
446 | .id_table = agp_efficeon_pci_table, | |
447 | .probe = agp_efficeon_probe, | |
448 | .remove = agp_efficeon_remove, | |
71565619 | 449 | #ifdef CONFIG_PM |
1da177e4 LT |
450 | .suspend = agp_efficeon_suspend, |
451 | .resume = agp_efficeon_resume, | |
71565619 | 452 | #endif |
1da177e4 LT |
453 | }; |
454 | ||
455 | static int __init agp_efficeon_init(void) | |
456 | { | |
457 | static int agp_initialised=0; | |
458 | ||
459 | if (agp_off) | |
460 | return -EINVAL; | |
461 | ||
462 | if (agp_initialised == 1) | |
463 | return 0; | |
464 | agp_initialised=1; | |
465 | ||
466 | return pci_register_driver(&agp_efficeon_pci_driver); | |
467 | } | |
468 | ||
469 | static void __exit agp_efficeon_cleanup(void) | |
470 | { | |
471 | pci_unregister_driver(&agp_efficeon_pci_driver); | |
472 | } | |
473 | ||
474 | module_init(agp_efficeon_init); | |
475 | module_exit(agp_efficeon_cleanup); | |
476 | ||
477 | MODULE_AUTHOR("Carlos Puchol <cpglinux@puchol.com>"); | |
478 | MODULE_LICENSE("GPL and additional rights"); |