blob: b972d83bb1b292eabc468cd06ce0547461179be8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2003-2005 Silicon Graphics, Inc. All Rights Reserved.
7 */
8
9/*
10 * SGI TIOCA AGPGART routines.
11 *
12 */
13
14#include <linux/acpi.h>
15#include <linux/module.h>
16#include <linux/pci.h>
17#include <linux/init.h>
18#include <linux/agp_backend.h>
19#include <asm/sn/addrs.h>
Tony Luck1fa92952005-09-09 11:41:12 -070020#include <asm/sn/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <asm/sn/pcidev.h>
22#include <asm/sn/pcibus_provider_defs.h>
23#include <asm/sn/tioca_provider.h>
24#include "agp.h"
25
26extern int agp_memory_reserved;
27extern uint32_t tioca_gart_found;
28extern struct list_head tioca_list;
29static struct agp_bridge_data **sgi_tioca_agp_bridges;
30
31/*
32 * The aperature size and related information is set up at TIOCA init time.
33 * Values for this table will be extracted and filled in at
34 * sgi_tioca_fetch_size() time.
35 */
36
37static struct aper_size_info_fixed sgi_tioca_sizes[] = {
38 {0, 0, 0},
39};
40
41static void *sgi_tioca_alloc_page(struct agp_bridge_data *bridge)
42{
43 struct page *page;
44 int nid;
45 struct tioca_kernel *info =
46 (struct tioca_kernel *)bridge->dev_private_data;
47
48 nid = info->ca_closest_node;
49 page = alloc_pages_node(nid, GFP_KERNEL, 0);
Dave Jonesb826b4d2007-04-09 02:20:34 -040050 if (!page)
51 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53 get_page(page);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 atomic_inc(&agp_bridge->current_memory_agp);
55 return page_address(page);
56}
57
58/*
59 * Flush GART tlb's. Cannot selectively flush based on memory so the mem
60 * arg is ignored.
61 */
62
63static void sgi_tioca_tlbflush(struct agp_memory *mem)
64{
65 tioca_tlbflush(mem->bridge->dev_private_data);
66}
67
68/*
69 * Given an address of a host physical page, turn it into a valid gart
70 * entry.
71 */
72static unsigned long
73sgi_tioca_mask_memory(struct agp_bridge_data *bridge,
74 unsigned long addr, int type)
75{
76 return tioca_physpage_to_gart(addr);
77}
78
79static void sgi_tioca_agp_enable(struct agp_bridge_data *bridge, u32 mode)
80{
81 tioca_fastwrite_enable(bridge->dev_private_data);
82}
83
84/*
85 * sgi_tioca_configure() doesn't have anything to do since the base CA driver
86 * has alreay set up the GART.
87 */
88
89static int sgi_tioca_configure(void)
90{
91 return 0;
92}
93
94/*
95 * Determine gfx aperature size. This has already been determined by the
96 * CA driver init, so just need to set agp_bridge values accordingly.
97 */
98
99static int sgi_tioca_fetch_size(void)
100{
101 struct tioca_kernel *info =
102 (struct tioca_kernel *)agp_bridge->dev_private_data;
103
104 sgi_tioca_sizes[0].size = info->ca_gfxap_size / MB(1);
105 sgi_tioca_sizes[0].num_entries = info->ca_gfxgart_entries;
106
107 return sgi_tioca_sizes[0].size;
108}
109
110static int sgi_tioca_create_gatt_table(struct agp_bridge_data *bridge)
111{
112 struct tioca_kernel *info =
113 (struct tioca_kernel *)bridge->dev_private_data;
114
115 bridge->gatt_table_real = (u32 *) info->ca_gfxgart;
116 bridge->gatt_table = bridge->gatt_table_real;
117 bridge->gatt_bus_addr = info->ca_gfxgart_base;
118
119 return 0;
120}
121
122static int sgi_tioca_free_gatt_table(struct agp_bridge_data *bridge)
123{
124 return 0;
125}
126
127static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
128 int type)
129{
130 int num_entries;
131 size_t i;
132 off_t j;
133 void *temp;
134 struct agp_bridge_data *bridge;
Michael Wernere29b5452005-03-27 22:08:42 -0800135 u64 *table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137 bridge = mem->bridge;
138 if (!bridge)
139 return -EINVAL;
140
Michael Wernere29b5452005-03-27 22:08:42 -0800141 table = (u64 *)bridge->gatt_table;
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 temp = bridge->current_size;
144
145 switch (bridge->driver->size_type) {
146 case U8_APER_SIZE:
147 num_entries = A_SIZE_8(temp)->num_entries;
148 break;
149 case U16_APER_SIZE:
150 num_entries = A_SIZE_16(temp)->num_entries;
151 break;
152 case U32_APER_SIZE:
153 num_entries = A_SIZE_32(temp)->num_entries;
154 break;
155 case FIXED_APER_SIZE:
156 num_entries = A_SIZE_FIX(temp)->num_entries;
157 break;
158 case LVL2_APER_SIZE:
159 return -EINVAL;
160 break;
161 default:
162 num_entries = 0;
163 break;
164 }
165
166 num_entries -= agp_memory_reserved / PAGE_SIZE;
167 if (num_entries < 0)
168 num_entries = 0;
169
170 if (type != 0 || mem->type != 0) {
171 return -EINVAL;
172 }
173
174 if ((pg_start + mem->page_count) > num_entries)
175 return -EINVAL;
176
177 j = pg_start;
178
179 while (j < (pg_start + mem->page_count)) {
Michael Wernere29b5452005-03-27 22:08:42 -0800180 if (table[j])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 return -EBUSY;
182 j++;
183 }
184
Joe Perchesc7258012008-03-26 14:10:02 -0700185 if (!mem->is_flushed) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 bridge->driver->cache_flush();
Joe Perchesc7258012008-03-26 14:10:02 -0700187 mem->is_flushed = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 }
189
190 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
Michael Wernere29b5452005-03-27 22:08:42 -0800191 table[j] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 bridge->driver->mask_memory(bridge, mem->memory[i],
193 mem->type);
194 }
195
196 bridge->driver->tlb_flush(mem);
197 return 0;
198}
199
200static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start,
201 int type)
202{
203 size_t i;
204 struct agp_bridge_data *bridge;
Michael Wernere29b5452005-03-27 22:08:42 -0800205 u64 *table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
207 bridge = mem->bridge;
208 if (!bridge)
209 return -EINVAL;
210
211 if (type != 0 || mem->type != 0) {
212 return -EINVAL;
213 }
214
Michael Wernere29b5452005-03-27 22:08:42 -0800215 table = (u64 *)bridge->gatt_table;
216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
Michael Wernere29b5452005-03-27 22:08:42 -0800218 table[i] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 }
220
221 bridge->driver->tlb_flush(mem);
222 return 0;
223}
224
225static void sgi_tioca_cache_flush(void)
226{
227}
228
229/*
230 * Cleanup. Nothing to do as the CA driver owns the GART.
231 */
232
233static void sgi_tioca_cleanup(void)
234{
235}
236
237static struct agp_bridge_data *sgi_tioca_find_bridge(struct pci_dev *pdev)
238{
239 struct agp_bridge_data *bridge;
240
241 list_for_each_entry(bridge, &agp_bridges, list) {
242 if (bridge->dev->bus == pdev->bus)
243 break;
244 }
245 return bridge;
246}
247
Ryusuke Konishie047d1c2007-02-27 14:13:02 +0900248const struct agp_bridge_driver sgi_tioca_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 .owner = THIS_MODULE,
250 .size_type = U16_APER_SIZE,
251 .configure = sgi_tioca_configure,
252 .fetch_size = sgi_tioca_fetch_size,
253 .cleanup = sgi_tioca_cleanup,
254 .tlb_flush = sgi_tioca_tlbflush,
255 .mask_memory = sgi_tioca_mask_memory,
256 .agp_enable = sgi_tioca_agp_enable,
257 .cache_flush = sgi_tioca_cache_flush,
258 .create_gatt_table = sgi_tioca_create_gatt_table,
259 .free_gatt_table = sgi_tioca_free_gatt_table,
260 .insert_memory = sgi_tioca_insert_memory,
261 .remove_memory = sgi_tioca_remove_memory,
262 .alloc_by_type = agp_generic_alloc_by_type,
263 .free_by_type = agp_generic_free_by_type,
264 .agp_alloc_page = sgi_tioca_alloc_page,
265 .agp_destroy_page = agp_generic_destroy_page,
Thomas Hellstroma030ce42007-01-23 10:33:43 +0100266 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
Joe Perchesc7258012008-03-26 14:10:02 -0700267 .cant_use_aperture = true,
268 .needs_scratch_page = false,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 .num_aperture_sizes = 1,
270};
271
272static int __devinit agp_sgi_init(void)
273{
274 unsigned int j;
275 struct tioca_kernel *info;
276 struct pci_dev *pdev = NULL;
277
278 if (tioca_gart_found)
279 printk(KERN_INFO PFX "SGI TIO CA GART driver initialized.\n");
280 else
281 return 0;
282
akpm@osdl.org7b37b062007-01-02 14:44:31 -0800283 sgi_tioca_agp_bridges = kmalloc(tioca_gart_found *
284 sizeof(struct agp_bridge_data *),
285 GFP_KERNEL);
286 if (!sgi_tioca_agp_bridges)
287 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
289 j = 0;
290 list_for_each_entry(info, &tioca_list, ca_list) {
291 struct list_head *tmp;
Dave Jones146a2092005-11-04 15:32:08 -0800292 if (list_empty(info->ca_devices))
293 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 list_for_each(tmp, info->ca_devices) {
295 u8 cap_ptr;
296 pdev = pci_dev_b(tmp);
297 if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8))
298 continue;
299 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
300 if (!cap_ptr)
301 continue;
302 }
303 sgi_tioca_agp_bridges[j] = agp_alloc_bridge();
304 printk(KERN_INFO PFX "bridge %d = 0x%p\n", j,
305 sgi_tioca_agp_bridges[j]);
306 if (sgi_tioca_agp_bridges[j]) {
307 sgi_tioca_agp_bridges[j]->dev = pdev;
308 sgi_tioca_agp_bridges[j]->dev_private_data = info;
309 sgi_tioca_agp_bridges[j]->driver = &sgi_tioca_driver;
310 sgi_tioca_agp_bridges[j]->gart_bus_addr =
311 info->ca_gfxap_base;
312 sgi_tioca_agp_bridges[j]->mode = (0x7D << 24) | /* 126 requests */
313 (0x1 << 9) | /* SBA supported */
314 (0x1 << 5) | /* 64-bit addresses supported */
315 (0x1 << 4) | /* FW supported */
316 (0x1 << 3) | /* AGP 3.0 mode */
317 0x2; /* 8x transfer only */
318 sgi_tioca_agp_bridges[j]->current_size =
319 sgi_tioca_agp_bridges[j]->previous_size =
320 (void *)&sgi_tioca_sizes[0];
321 agp_add_bridge(sgi_tioca_agp_bridges[j]);
322 }
323 j++;
324 }
325
326 agp_find_bridge = &sgi_tioca_find_bridge;
327 return 0;
328}
329
330static void __devexit agp_sgi_cleanup(void)
331{
Jesper Juhl8f760782006-06-27 02:55:06 -0700332 kfree(sgi_tioca_agp_bridges);
333 sgi_tioca_agp_bridges = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334}
335
336module_init(agp_sgi_init);
337module_exit(agp_sgi_cleanup);
338
339MODULE_LICENSE("GPL and additional rights");