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
6 * Copyright (C) 2003-2005 Silicon Graphics, Inc. All Rights Reserved.
10 * SGI TIOCA AGPGART routines.
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>
20 #include <asm/sn/io.h>
21 #include <asm/sn/pcidev.h>
22 #include <asm/sn/pcibus_provider_defs.h>
23 #include <asm/sn/tioca_provider.h>
26 extern int agp_memory_reserved;
27 extern uint32_t tioca_gart_found;
28 extern struct list_head tioca_list;
29 static struct agp_bridge_data **sgi_tioca_agp_bridges;
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.
37 static struct aper_size_info_fixed sgi_tioca_sizes[] = {
41 static void *sgi_tioca_alloc_page(struct agp_bridge_data *bridge)
45 struct tioca_kernel *info =
46 (struct tioca_kernel *)bridge->dev_private_data;
48 nid = info->ca_closest_node;
49 page = alloc_pages_node(nid, GFP_KERNEL, 0);
56 atomic_inc(&agp_bridge->current_memory_agp);
57 return page_address(page);
61 * Flush GART tlb's. Cannot selectively flush based on memory so the mem
65 static void sgi_tioca_tlbflush(struct agp_memory *mem)
67 tioca_tlbflush(mem->bridge->dev_private_data);
71 * Given an address of a host physical page, turn it into a valid gart
75 sgi_tioca_mask_memory(struct agp_bridge_data *bridge,
76 unsigned long addr, int type)
78 return tioca_physpage_to_gart(addr);
81 static void sgi_tioca_agp_enable(struct agp_bridge_data *bridge, u32 mode)
83 tioca_fastwrite_enable(bridge->dev_private_data);
87 * sgi_tioca_configure() doesn't have anything to do since the base CA driver
88 * has alreay set up the GART.
91 static int sgi_tioca_configure(void)
97 * Determine gfx aperature size. This has already been determined by the
98 * CA driver init, so just need to set agp_bridge values accordingly.
101 static int sgi_tioca_fetch_size(void)
103 struct tioca_kernel *info =
104 (struct tioca_kernel *)agp_bridge->dev_private_data;
106 sgi_tioca_sizes[0].size = info->ca_gfxap_size / MB(1);
107 sgi_tioca_sizes[0].num_entries = info->ca_gfxgart_entries;
109 return sgi_tioca_sizes[0].size;
112 static int sgi_tioca_create_gatt_table(struct agp_bridge_data *bridge)
114 struct tioca_kernel *info =
115 (struct tioca_kernel *)bridge->dev_private_data;
117 bridge->gatt_table_real = (u32 *) info->ca_gfxgart;
118 bridge->gatt_table = bridge->gatt_table_real;
119 bridge->gatt_bus_addr = info->ca_gfxgart_base;
124 static int sgi_tioca_free_gatt_table(struct agp_bridge_data *bridge)
129 static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
136 struct agp_bridge_data *bridge;
139 bridge = mem->bridge;
143 table = (u64 *)bridge->gatt_table;
145 temp = bridge->current_size;
147 switch (bridge->driver->size_type) {
149 num_entries = A_SIZE_8(temp)->num_entries;
152 num_entries = A_SIZE_16(temp)->num_entries;
155 num_entries = A_SIZE_32(temp)->num_entries;
157 case FIXED_APER_SIZE:
158 num_entries = A_SIZE_FIX(temp)->num_entries;
168 num_entries -= agp_memory_reserved / PAGE_SIZE;
172 if (type != 0 || mem->type != 0) {
176 if ((pg_start + mem->page_count) > num_entries)
181 while (j < (pg_start + mem->page_count)) {
187 if (mem->is_flushed == FALSE) {
188 bridge->driver->cache_flush();
189 mem->is_flushed = TRUE;
192 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
194 bridge->driver->mask_memory(bridge, mem->memory[i],
198 bridge->driver->tlb_flush(mem);
202 static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start,
206 struct agp_bridge_data *bridge;
209 bridge = mem->bridge;
213 if (type != 0 || mem->type != 0) {
217 table = (u64 *)bridge->gatt_table;
219 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
223 bridge->driver->tlb_flush(mem);
227 static void sgi_tioca_cache_flush(void)
232 * Cleanup. Nothing to do as the CA driver owns the GART.
235 static void sgi_tioca_cleanup(void)
239 static struct agp_bridge_data *sgi_tioca_find_bridge(struct pci_dev *pdev)
241 struct agp_bridge_data *bridge;
243 list_for_each_entry(bridge, &agp_bridges, list) {
244 if (bridge->dev->bus == pdev->bus)
250 struct agp_bridge_driver sgi_tioca_driver = {
251 .owner = THIS_MODULE,
252 .size_type = U16_APER_SIZE,
253 .configure = sgi_tioca_configure,
254 .fetch_size = sgi_tioca_fetch_size,
255 .cleanup = sgi_tioca_cleanup,
256 .tlb_flush = sgi_tioca_tlbflush,
257 .mask_memory = sgi_tioca_mask_memory,
258 .agp_enable = sgi_tioca_agp_enable,
259 .cache_flush = sgi_tioca_cache_flush,
260 .create_gatt_table = sgi_tioca_create_gatt_table,
261 .free_gatt_table = sgi_tioca_free_gatt_table,
262 .insert_memory = sgi_tioca_insert_memory,
263 .remove_memory = sgi_tioca_remove_memory,
264 .alloc_by_type = agp_generic_alloc_by_type,
265 .free_by_type = agp_generic_free_by_type,
266 .agp_alloc_page = sgi_tioca_alloc_page,
267 .agp_destroy_page = agp_generic_destroy_page,
268 .cant_use_aperture = 1,
269 .needs_scratch_page = 0,
270 .num_aperture_sizes = 1,
273 static int __devinit agp_sgi_init(void)
276 struct tioca_kernel *info;
277 struct pci_dev *pdev = NULL;
279 if (tioca_gart_found)
280 printk(KERN_INFO PFX "SGI TIO CA GART driver initialized.\n");
284 sgi_tioca_agp_bridges =
285 (struct agp_bridge_data **)kmalloc(tioca_gart_found *
286 sizeof(struct agp_bridge_data *),
290 list_for_each_entry(info, &tioca_list, ca_list) {
291 struct list_head *tmp;
292 if (list_empty(info->ca_devices))
294 list_for_each(tmp, info->ca_devices) {
296 pdev = pci_dev_b(tmp);
297 if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8))
299 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
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 =
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]);
326 agp_find_bridge = &sgi_tioca_find_bridge;
330 static void __devexit agp_sgi_cleanup(void)
332 kfree(sgi_tioca_agp_bridges);
333 sgi_tioca_agp_bridges = NULL;
336 module_init(agp_sgi_init);
337 module_exit(agp_sgi_cleanup);
339 MODULE_LICENSE("GPL and additional rights");