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net: Fix recursive descent in __scm_destroy().
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / agp / ali-agp.c
blob31dcd9142d54416f623f5a53e587c2c0ed33fafc
1 /*
2 * ALi AGPGART routines.
3 */
4
5 #include <linux/types.h>
6 #include <linux/module.h>
7 #include <linux/pci.h>
8 #include <linux/init.h>
9 #include <linux/agp_backend.h>
10 #include <asm/page.h> /* PAGE_SIZE */
11 #include "agp.h"
12
13 #define ALI_AGPCTRL 0xb8
14 #define ALI_ATTBASE 0xbc
15 #define ALI_TLBCTRL 0xc0
16 #define ALI_TAGCTRL 0xc4
17 #define ALI_CACHE_FLUSH_CTRL 0xD0
18 #define ALI_CACHE_FLUSH_ADDR_MASK 0xFFFFF000
19 #define ALI_CACHE_FLUSH_EN 0x100
20
21 static int ali_fetch_size(void)
22 {
23 int i;
24 u32 temp;
25 struct aper_size_info_32 *values;
26
27 pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
28 temp &= ~(0xfffffff0);
29 values = A_SIZE_32(agp_bridge->driver->aperture_sizes);
30
31 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
32 if (temp == values[i].size_value) {
33 agp_bridge->previous_size =
34 agp_bridge->current_size = (void *) (values + i);
35 agp_bridge->aperture_size_idx = i;
36 return values[i].size;
37 }
38 }
39
40 return 0;
41 }
42
43 static void ali_tlbflush(struct agp_memory *mem)
44 {
45 u32 temp;
46
47 pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
48 temp &= 0xfffffff0;
49 temp |= (1<<0 | 1<<1);
50 pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL, temp);
51 }
52
53 static void ali_cleanup(void)
54 {
55 struct aper_size_info_32 *previous_size;
56 u32 temp;
57
58 previous_size = A_SIZE_32(agp_bridge->previous_size);
59
60 pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
61 // clear tag
62 pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL,
63 ((temp & 0xffffff00) | 0x00000001|0x00000002));
64
65 pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
66 pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE,
67 ((temp & 0x00000ff0) | previous_size->size_value));
68 }
69
70 static int ali_configure(void)
71 {
72 u32 temp;
73 struct aper_size_info_32 *current_size;
74
75 current_size = A_SIZE_32(agp_bridge->current_size);
76
77 /* aperture size and gatt addr */
78 pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
79 temp = (((temp & 0x00000ff0) | (agp_bridge->gatt_bus_addr & 0xfffff000))
80 | (current_size->size_value & 0xf));
81 pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE, temp);
82
83 /* tlb control */
84 pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
85 pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, ((temp & 0xffffff00) | 0x00000010));
86
87 /* address to map to */
88 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
89 agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
90
91 #if 0
92 if (agp_bridge->type == ALI_M1541) {
93 u32 nlvm_addr = 0;
94
95 switch (current_size->size_value) {
96 case 0: break;
97 case 1: nlvm_addr = 0x100000;break;
98 case 2: nlvm_addr = 0x200000;break;
99 case 3: nlvm_addr = 0x400000;break;
100 case 4: nlvm_addr = 0x800000;break;
101 case 6: nlvm_addr = 0x1000000;break;
102 case 7: nlvm_addr = 0x2000000;break;
103 case 8: nlvm_addr = 0x4000000;break;
104 case 9: nlvm_addr = 0x8000000;break;
105 case 10: nlvm_addr = 0x10000000;break;
106 default: break;
107 }
108 nlvm_addr--;
109 nlvm_addr&=0xfff00000;
110
111 nlvm_addr+= agp_bridge->gart_bus_addr;
112 nlvm_addr|=(agp_bridge->gart_bus_addr>>12);
113 dev_info(&agp_bridge->dev->dev, "nlvm top &base = %8x\n",
114 nlvm_addr);
115 }
116 #endif
117
118 pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
119 temp &= 0xffffff7f; //enable TLB
120 pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, temp);
121
122 return 0;
123 }
124
125
126 static void m1541_cache_flush(void)
127 {
128 int i, page_count;
129 u32 temp;
130
131 global_cache_flush();
132
133 page_count = 1 << A_SIZE_32(agp_bridge->current_size)->page_order;
134 for (i = 0; i < PAGE_SIZE * page_count; i += PAGE_SIZE) {
135 pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
136 &temp);
137 pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
138 (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
139 (agp_bridge->gatt_bus_addr + i)) |
140 ALI_CACHE_FLUSH_EN));
141 }
142 }
143
144 static void *m1541_alloc_page(struct agp_bridge_data *bridge)
145 {
146 void *addr = agp_generic_alloc_page(agp_bridge);
147 u32 temp;
148
149 if (!addr)
150 return NULL;
151
152 pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
153 pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
154 (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
155 virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN ));
156 return addr;
157 }
158
159 static void ali_destroy_page(void * addr, int flags)
160 {
161 if (addr) {
162 if (flags & AGP_PAGE_DESTROY_UNMAP) {
163 global_cache_flush(); /* is this really needed? --hch */
164 agp_generic_destroy_page(addr, flags);
165 } else
166 agp_generic_destroy_page(addr, flags);
167 }
168 }
169
170 static void m1541_destroy_page(void * addr, int flags)
171 {
172 u32 temp;
173
174 if (addr == NULL)
175 return;
176
177 if (flags & AGP_PAGE_DESTROY_UNMAP) {
178 global_cache_flush();
179
180 pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
181 pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
182 (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
183 virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN));
184 }
185 agp_generic_destroy_page(addr, flags);
186 }
187
188
189 /* Setup function */
190
191 static const struct aper_size_info_32 ali_generic_sizes[7] =
192 {
193 {256, 65536, 6, 10},
194 {128, 32768, 5, 9},
195 {64, 16384, 4, 8},
196 {32, 8192, 3, 7},
197 {16, 4096, 2, 6},
198 {8, 2048, 1, 4},
199 {4, 1024, 0, 3}
200 };
201
202 static const struct agp_bridge_driver ali_generic_bridge = {
203 .owner = THIS_MODULE,
204 .aperture_sizes = ali_generic_sizes,
205 .size_type = U32_APER_SIZE,
206 .num_aperture_sizes = 7,
207 .configure = ali_configure,
208 .fetch_size = ali_fetch_size,
209 .cleanup = ali_cleanup,
210 .tlb_flush = ali_tlbflush,
211 .mask_memory = agp_generic_mask_memory,
212 .masks = NULL,
213 .agp_enable = agp_generic_enable,
214 .cache_flush = global_cache_flush,
215 .create_gatt_table = agp_generic_create_gatt_table,
216 .free_gatt_table = agp_generic_free_gatt_table,
217 .insert_memory = agp_generic_insert_memory,
218 .remove_memory = agp_generic_remove_memory,
219 .alloc_by_type = agp_generic_alloc_by_type,
220 .free_by_type = agp_generic_free_by_type,
221 .agp_alloc_page = agp_generic_alloc_page,
222 .agp_destroy_page = ali_destroy_page,
223 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
224 };
225
226 static const struct agp_bridge_driver ali_m1541_bridge = {
227 .owner = THIS_MODULE,
228 .aperture_sizes = ali_generic_sizes,
229 .size_type = U32_APER_SIZE,
230 .num_aperture_sizes = 7,
231 .configure = ali_configure,
232 .fetch_size = ali_fetch_size,
233 .cleanup = ali_cleanup,
234 .tlb_flush = ali_tlbflush,
235 .mask_memory = agp_generic_mask_memory,
236 .masks = NULL,
237 .agp_enable = agp_generic_enable,
238 .cache_flush = m1541_cache_flush,
239 .create_gatt_table = agp_generic_create_gatt_table,
240 .free_gatt_table = agp_generic_free_gatt_table,
241 .insert_memory = agp_generic_insert_memory,
242 .remove_memory = agp_generic_remove_memory,
243 .alloc_by_type = agp_generic_alloc_by_type,
244 .free_by_type = agp_generic_free_by_type,
245 .agp_alloc_page = m1541_alloc_page,
246 .agp_destroy_page = m1541_destroy_page,
247 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
248 };
249
250
251 static struct agp_device_ids ali_agp_device_ids[] __devinitdata =
252 {
253 {
254 .device_id = PCI_DEVICE_ID_AL_M1541,
255 .chipset_name = "M1541",
256 },
257 {
258 .device_id = PCI_DEVICE_ID_AL_M1621,
259 .chipset_name = "M1621",
260 },
261 {
262 .device_id = PCI_DEVICE_ID_AL_M1631,
263 .chipset_name = "M1631",
264 },
265 {
266 .device_id = PCI_DEVICE_ID_AL_M1632,
267 .chipset_name = "M1632",
268 },
269 {
270 .device_id = PCI_DEVICE_ID_AL_M1641,
271 .chipset_name = "M1641",
272 },
273 {
274 .device_id = PCI_DEVICE_ID_AL_M1644,
275 .chipset_name = "M1644",
276 },
277 {
278 .device_id = PCI_DEVICE_ID_AL_M1647,
279 .chipset_name = "M1647",
280 },
281 {
282 .device_id = PCI_DEVICE_ID_AL_M1651,
283 .chipset_name = "M1651",
284 },
285 {
286 .device_id = PCI_DEVICE_ID_AL_M1671,
287 .chipset_name = "M1671",
288 },
289 {
290 .device_id = PCI_DEVICE_ID_AL_M1681,
291 .chipset_name = "M1681",
292 },
293 {
294 .device_id = PCI_DEVICE_ID_AL_M1683,
295 .chipset_name = "M1683",
296 },
297
298 { }, /* dummy final entry, always present */
299 };
300
301 static int __devinit agp_ali_probe(struct pci_dev *pdev,
302 const struct pci_device_id *ent)
303 {
304 struct agp_device_ids *devs = ali_agp_device_ids;
305 struct agp_bridge_data *bridge;
306 u8 hidden_1621_id, cap_ptr;
307 int j;
308
309 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
310 if (!cap_ptr)
311 return -ENODEV;
312
313 /* probe for known chipsets */
314 for (j = 0; devs[j].chipset_name; j++) {
315 if (pdev->device == devs[j].device_id)
316 goto found;
317 }
318
319 dev_err(&pdev->dev, "unsupported ALi chipset [%04x/%04x])\n",
320 pdev->vendor, pdev->device);
321 return -ENODEV;
322
323
324 found:
325 bridge = agp_alloc_bridge();
326 if (!bridge)
327 return -ENOMEM;
328
329 bridge->dev = pdev;
330 bridge->capndx = cap_ptr;
331
332 switch (pdev->device) {
333 case PCI_DEVICE_ID_AL_M1541:
334 bridge->driver = &ali_m1541_bridge;
335 break;
336 case PCI_DEVICE_ID_AL_M1621:
337 pci_read_config_byte(pdev, 0xFB, &hidden_1621_id);
338 switch (hidden_1621_id) {
339 case 0x31:
340 devs[j].chipset_name = "M1631";
341 break;
342 case 0x32:
343 devs[j].chipset_name = "M1632";
344 break;
345 case 0x41:
346 devs[j].chipset_name = "M1641";
347 break;
348 case 0x43:
349 devs[j].chipset_name = "M????";
350 break;
351 case 0x47:
352 devs[j].chipset_name = "M1647";
353 break;
354 case 0x51:
355 devs[j].chipset_name = "M1651";
356 break;
357 default:
358 break;
359 }
360 /*FALLTHROUGH*/
361 default:
362 bridge->driver = &ali_generic_bridge;
363 }
364
365 dev_info(&pdev->dev, "ALi %s chipset\n", devs[j].chipset_name);
366
367 /* Fill in the mode register */
368 pci_read_config_dword(pdev,
369 bridge->capndx+PCI_AGP_STATUS,
370 &bridge->mode);
371
372 pci_set_drvdata(pdev, bridge);
373 return agp_add_bridge(bridge);
374 }
375
376 static void __devexit agp_ali_remove(struct pci_dev *pdev)
377 {
378 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
379
380 agp_remove_bridge(bridge);
381 agp_put_bridge(bridge);
382 }
383
384 static struct pci_device_id agp_ali_pci_table[] = {
385 {
386 .class = (PCI_CLASS_BRIDGE_HOST << 8),
387 .class_mask = ~0,
388 .vendor = PCI_VENDOR_ID_AL,
389 .device = PCI_ANY_ID,
390 .subvendor = PCI_ANY_ID,
391 .subdevice = PCI_ANY_ID,
392 },
393 { }
394 };
395
396 MODULE_DEVICE_TABLE(pci, agp_ali_pci_table);
397
398 static struct pci_driver agp_ali_pci_driver = {
399 .name = "agpgart-ali",
400 .id_table = agp_ali_pci_table,
401 .probe = agp_ali_probe,
402 .remove = agp_ali_remove,
403 };
404
405 static int __init agp_ali_init(void)
406 {
407 if (agp_off)
408 return -EINVAL;
409 return pci_register_driver(&agp_ali_pci_driver);
410 }
411
412 static void __exit agp_ali_cleanup(void)
413 {
414 pci_unregister_driver(&agp_ali_pci_driver);
415 }
416
417 module_init(agp_ali_init);
418 module_exit(agp_ali_cleanup);
419
420 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
421 MODULE_LICENSE("GPL and additional rights");
422
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