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);
54 atomic_inc(&agp_bridge->current_memory_agp);
55 return page_address(page);
59 * Flush GART tlb's. Cannot selectively flush based on memory so the mem
63 static void sgi_tioca_tlbflush(struct agp_memory *mem)
65 tioca_tlbflush(mem->bridge->dev_private_data);
69 * Given an address of a host physical page, turn it into a valid gart
73 sgi_tioca_mask_memory(struct agp_bridge_data *bridge,
74 unsigned long addr, int type)
76 return tioca_physpage_to_gart(addr);
79 static void sgi_tioca_agp_enable(struct agp_bridge_data *bridge, u32 mode)
81 tioca_fastwrite_enable(bridge->dev_private_data);
85 * sgi_tioca_configure() doesn't have anything to do since the base CA driver
86 * has alreay set up the GART.
89 static int sgi_tioca_configure(void)
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.
99 static int sgi_tioca_fetch_size(void)
101 struct tioca_kernel *info =
102 (struct tioca_kernel *)agp_bridge->dev_private_data;
104 sgi_tioca_sizes[0].size = info->ca_gfxap_size / MB(1);
105 sgi_tioca_sizes[0].num_entries = info->ca_gfxgart_entries;
107 return sgi_tioca_sizes[0].size;
110 static int sgi_tioca_create_gatt_table(struct agp_bridge_data *bridge)
112 struct tioca_kernel *info =
113 (struct tioca_kernel *)bridge->dev_private_data;
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;
122 static int sgi_tioca_free_gatt_table(struct agp_bridge_data *bridge)
127 static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
134 struct agp_bridge_data *bridge;
137 bridge = mem->bridge;
141 table = (u64 *)bridge->gatt_table;
143 temp = bridge->current_size;
145 switch (bridge->driver->size_type) {
147 num_entries = A_SIZE_8(temp)->num_entries;
150 num_entries = A_SIZE_16(temp)->num_entries;
153 num_entries = A_SIZE_32(temp)->num_entries;
155 case FIXED_APER_SIZE:
156 num_entries = A_SIZE_FIX(temp)->num_entries;
166 num_entries -= agp_memory_reserved / PAGE_SIZE;
170 if (type != 0 || mem->type != 0) {
174 if ((pg_start + mem->page_count) > num_entries)
179 while (j < (pg_start + mem->page_count)) {
185 if (mem->is_flushed == FALSE) {
186 bridge->driver->cache_flush();
187 mem->is_flushed = TRUE;
190 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
192 bridge->driver->mask_memory(bridge, mem->memory[i],
196 bridge->driver->tlb_flush(mem);
200 static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start,
204 struct agp_bridge_data *bridge;
207 bridge = mem->bridge;
211 if (type != 0 || mem->type != 0) {
215 table = (u64 *)bridge->gatt_table;
217 for (i = pg_start; i < (mem->page_count + pg_start); i++) {
221 bridge->driver->tlb_flush(mem);
225 static void sgi_tioca_cache_flush(void)
230 * Cleanup. Nothing to do as the CA driver owns the GART.
233 static void sgi_tioca_cleanup(void)
237 static struct agp_bridge_data *sgi_tioca_find_bridge(struct pci_dev *pdev)
239 struct agp_bridge_data *bridge;
241 list_for_each_entry(bridge, &agp_bridges, list) {
242 if (bridge->dev->bus == pdev->bus)
248 const struct agp_bridge_driver sgi_tioca_driver = {
249 .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,
266 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
267 .cant_use_aperture = 1,
268 .needs_scratch_page = 0,
269 .num_aperture_sizes = 1,
272 static int __devinit agp_sgi_init(void)
275 struct tioca_kernel *info;
276 struct pci_dev *pdev = NULL;
278 if (tioca_gart_found)
279 printk(KERN_INFO PFX "SGI TIO CA GART driver initialized.\n");
283 sgi_tioca_agp_bridges = kmalloc(tioca_gart_found *
284 sizeof(struct agp_bridge_data *),
286 if (!sgi_tioca_agp_bridges)
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");