diff options
Diffstat (limited to 'drivers/char/agp/ati-agp.c')
| -rw-r--r-- | drivers/char/agp/ati-agp.c | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/drivers/char/agp/ati-agp.c b/drivers/char/agp/ati-agp.c new file mode 100644 index 00000000000..757dde006fc --- /dev/null +++ b/drivers/char/agp/ati-agp.c @@ -0,0 +1,548 @@ +/* + * ATi AGPGART routines. + */ + +#include <linux/types.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/agp_backend.h> +#include <asm/agp.h> +#include "agp.h" + +#define ATI_GART_MMBASE_ADDR 0x14 +#define ATI_RS100_APSIZE 0xac +#define ATI_RS100_IG_AGPMODE 0xb0 +#define ATI_RS300_APSIZE 0xf8 +#define ATI_RS300_IG_AGPMODE 0xfc +#define ATI_GART_FEATURE_ID 0x00 +#define ATI_GART_BASE 0x04 +#define ATI_GART_CACHE_SZBASE 0x08 +#define ATI_GART_CACHE_CNTRL 0x0c +#define ATI_GART_CACHE_ENTRY_CNTRL 0x10 + + +static struct aper_size_info_lvl2 ati_generic_sizes[7] = +{ + {2048, 524288, 0x0000000c}, + {1024, 262144, 0x0000000a}, + {512, 131072, 0x00000008}, + {256, 65536, 0x00000006}, + {128, 32768, 0x00000004}, + {64, 16384, 0x00000002}, + {32, 8192, 0x00000000} +}; + +static struct gatt_mask ati_generic_masks[] = +{ + { .mask = 1, .type = 0} +}; + + + +typedef struct _ati_page_map { + unsigned long *real; + unsigned long __iomem *remapped; +} ati_page_map; + +static struct _ati_generic_private { + volatile u8 __iomem *registers; + ati_page_map **gatt_pages; + int num_tables; +} ati_generic_private; + +static int ati_create_page_map(ati_page_map *page_map) +{ + int i, err = 0; + + page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL); + if (page_map->real == NULL) + return -ENOMEM; + + SetPageReserved(virt_to_page(page_map->real)); + err = map_page_into_agp(virt_to_page(page_map->real)); + page_map->remapped = ioremap_nocache(virt_to_phys(page_map->real), + PAGE_SIZE); + if (page_map->remapped == NULL || err) { + ClearPageReserved(virt_to_page(page_map->real)); + free_page((unsigned long) page_map->real); + page_map->real = NULL; + return -ENOMEM; + } + /*CACHE_FLUSH();*/ + global_cache_flush(); + + for(i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) { + writel(agp_bridge->scratch_page, page_map->remapped+i); + readl(page_map->remapped+i); /* PCI Posting. */ + } + + return 0; +} + + +static void ati_free_page_map(ati_page_map *page_map) +{ + unmap_page_from_agp(virt_to_page(page_map->real)); + iounmap(page_map->remapped); + ClearPageReserved(virt_to_page(page_map->real)); + free_page((unsigned long) page_map->real); +} + + +static void ati_free_gatt_pages(void) +{ + int i; + ati_page_map **tables; + ati_page_map *entry; + + tables = ati_generic_private.gatt_pages; + for(i = 0; i < ati_generic_private.num_tables; i++) { + entry = tables[i]; + if (entry != NULL) { + if (entry->real != NULL) + ati_free_page_map(entry); + kfree(entry); + } + } + kfree(tables); +} + + +static int ati_create_gatt_pages(int nr_tables) +{ + ati_page_map **tables; + ati_page_map *entry; + int retval = 0; + int i; + + tables = kmalloc((nr_tables + 1) * sizeof(ati_page_map *), + GFP_KERNEL); + if (tables == NULL) + return -ENOMEM; + + memset(tables, 0, sizeof(ati_page_map *) * (nr_tables + 1)); + for (i = 0; i < nr_tables; i++) { + entry = kmalloc(sizeof(ati_page_map), GFP_KERNEL); + if (entry == NULL) { + while (i>0) { + kfree (tables[i-1]); + i--; + } + kfree (tables); + tables = NULL; + retval = -ENOMEM; + break; + } + memset(entry, 0, sizeof(ati_page_map)); + tables[i] = entry; + retval = ati_create_page_map(entry); + if (retval != 0) break; + } + ati_generic_private.num_tables = nr_tables; + ati_generic_private.gatt_pages = tables; + + if (retval != 0) ati_free_gatt_pages(); + + return retval; +} + +static int is_r200(void) +{ + if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) || + (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) || + (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) || + (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250)) + return 1; + return 0; +} + +static int ati_fetch_size(void) +{ + int i; + u32 temp; + struct aper_size_info_lvl2 *values; + + if (is_r200()) + pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); + else + pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); + + temp = (temp & 0x0000000e); + values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); + for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { + if (temp == values[i].size_value) { + agp_bridge->previous_size = + agp_bridge->current_size = (void *) (values + i); + + agp_bridge->aperture_size_idx = i; + return values[i].size; + } + } + + return 0; +} + +static void ati_tlbflush(struct agp_memory * mem) +{ + writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL); + readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */ +} + +static void ati_cleanup(void) +{ + struct aper_size_info_lvl2 *previous_size; + u32 temp; + + previous_size = A_SIZE_LVL2(agp_bridge->previous_size); + + /* Write back the previous size and disable gart translation */ + if (is_r200()) { + pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); + temp = ((temp & ~(0x0000000f)) | previous_size->size_value); + pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); + } else { + pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); + temp = ((temp & ~(0x0000000f)) | previous_size->size_value); + pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); + } + iounmap((volatile u8 __iomem *)ati_generic_private.registers); +} + + +static int ati_configure(void) +{ + u32 temp; + + /* Get the memory mapped registers */ + pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp); + temp = (temp & 0xfffff000); + ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096); + + if (is_r200()) + pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000); + else + pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000); + + /* address to map too */ + /* + pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp); + agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); + printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr); + */ + writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID); + readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/ + + /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */ + pci_read_config_dword(agp_bridge->dev, 4, &temp); + pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14)); + + /* Write out the address of the gatt table */ + writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE); + readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */ + + return 0; +} + + +/* + *Since we don't need contigious memory we just try + * to get the gatt table once + */ + +#define GET_PAGE_DIR_OFF(addr) (addr >> 22) +#define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ + GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) +#define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) +#undef GET_GATT +#define GET_GATT(addr) (ati_generic_private.gatt_pages[\ + GET_PAGE_DIR_IDX(addr)]->remapped) + +static int ati_insert_memory(struct agp_memory * mem, + off_t pg_start, int type) +{ + int i, j, num_entries; + unsigned long __iomem *cur_gatt; + unsigned long addr; + + num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; + + if (type != 0 || mem->type != 0) + return -EINVAL; + + if ((pg_start + mem->page_count) > num_entries) + return -EINVAL; + + j = pg_start; + while (j < (pg_start + mem->page_count)) { + addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; + cur_gatt = GET_GATT(addr); + if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr)))) + return -EBUSY; + j++; + } + + if (mem->is_flushed == FALSE) { + /*CACHE_FLUSH(); */ + global_cache_flush(); + mem->is_flushed = TRUE; + } + + for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { + addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; + cur_gatt = GET_GATT(addr); + writel(agp_bridge->driver->mask_memory(agp_bridge, + mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr)); + readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ + } + agp_bridge->driver->tlb_flush(mem); + return 0; +} + +static int ati_remove_memory(struct agp_memory * mem, off_t pg_start, + int type) +{ + int i; + unsigned long __iomem *cur_gatt; + unsigned long addr; + + if (type != 0 || mem->type != 0) { + return -EINVAL; + } + for (i = pg_start; i < (mem->page_count + pg_start); i++) { + addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; + cur_gatt = GET_GATT(addr); + writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); + readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ + } + + agp_bridge->driver->tlb_flush(mem); + return 0; +} + +static int ati_create_gatt_table(struct agp_bridge_data *bridge) +{ + struct aper_size_info_lvl2 *value; + ati_page_map page_dir; + unsigned long addr; + int retval; + u32 temp; + int i; + struct aper_size_info_lvl2 *current_size; + + value = A_SIZE_LVL2(agp_bridge->current_size); + retval = ati_create_page_map(&page_dir); + if (retval != 0) + return retval; + + retval = ati_create_gatt_pages(value->num_entries / 1024); + if (retval != 0) { + ati_free_page_map(&page_dir); + return retval; + } + + agp_bridge->gatt_table_real = (u32 *)page_dir.real; + agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped; + agp_bridge->gatt_bus_addr = virt_to_bus(page_dir.real); + + /* Write out the size register */ + current_size = A_SIZE_LVL2(agp_bridge->current_size); + + if (is_r200()) { + pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); + temp = (((temp & ~(0x0000000e)) | current_size->size_value) + | 0x00000001); + pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); + pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); + } else { + pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); + temp = (((temp & ~(0x0000000e)) | current_size->size_value) + | 0x00000001); + pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); + pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); + } + + /* + * Get the address for the gart region. + * This is a bus address even on the alpha, b/c its + * used to program the agp master not the cpu + */ + pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); + addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); + agp_bridge->gart_bus_addr = addr; + + /* Calculate the agp offset */ + for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) { + writel(virt_to_bus(ati_generic_private.gatt_pages[i]->real) | 1, + page_dir.remapped+GET_PAGE_DIR_OFF(addr)); + readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */ + } + + return 0; +} + +static int ati_free_gatt_table(struct agp_bridge_data *bridge) +{ + ati_page_map page_dir; + + page_dir.real = (unsigned long *)agp_bridge->gatt_table_real; + page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table; + + ati_free_gatt_pages(); + ati_free_page_map(&page_dir); + return 0; +} + +struct agp_bridge_driver ati_generic_bridge = { + .owner = THIS_MODULE, + .aperture_sizes = ati_generic_sizes, + .size_type = LVL2_APER_SIZE, + .num_aperture_sizes = 7, + .configure = ati_configure, + .fetch_size = ati_fetch_size, + .cleanup = ati_cleanup, + .tlb_flush = ati_tlbflush, + .mask_memory = agp_generic_mask_memory, + .masks = ati_generic_masks, + .agp_enable = agp_generic_enable, + .cache_flush = global_cache_flush, + .create_gatt_table = ati_create_gatt_table, + .free_gatt_table = ati_free_gatt_table, + .insert_memory = ati_insert_memory, + .remove_memory = ati_remove_memory, + .alloc_by_type = agp_generic_alloc_by_type, + .free_by_type = agp_generic_free_by_type, + .agp_alloc_page = agp_generic_alloc_page, + .agp_destroy_page = agp_generic_destroy_page, +}; + + +static struct agp_device_ids ati_agp_device_ids[] __devinitdata = +{ + { + .device_id = PCI_DEVICE_ID_ATI_RS100, + .chipset_name = "IGP320/M", + }, + { + .device_id = PCI_DEVICE_ID_ATI_RS200, + .chipset_name = "IGP330/340/345/350/M", + }, + { + .device_id = PCI_DEVICE_ID_ATI_RS200_B, + .chipset_name = "IGP345M", + }, + { + .device_id = PCI_DEVICE_ID_ATI_RS250, + .chipset_name = "IGP7000/M", + }, + { + .device_id = PCI_DEVICE_ID_ATI_RS300_100, + .chipset_name = "IGP9100/M", + }, + { + .device_id = PCI_DEVICE_ID_ATI_RS300_133, + .chipset_name = "IGP9100/M", + }, + { + .device_id = PCI_DEVICE_ID_ATI_RS300_166, + .chipset_name = "IGP9100/M", + }, + { + .device_id = PCI_DEVICE_ID_ATI_RS300_200, + .chipset_name = "IGP9100/M", + }, + { }, /* dummy final entry, always present */ +}; + +static int __devinit agp_ati_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct agp_device_ids *devs = ati_agp_device_ids; + struct agp_bridge_data *bridge; + u8 cap_ptr; + int j; + + cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); + if (!cap_ptr) + return -ENODEV; + + /* probe for known chipsets */ + for (j = 0; devs[j].chipset_name; j++) { + if (pdev->device == devs[j].device_id) + goto found; + } + + printk(KERN_ERR PFX + "Unsupported Ati chipset (device id: %04x)\n", pdev->device); + return -ENODEV; + +found: + bridge = agp_alloc_bridge(); + if (!bridge) + return -ENOMEM; + + bridge->dev = pdev; + bridge->capndx = cap_ptr; + + bridge->driver = &ati_generic_bridge; + + + printk(KERN_INFO PFX "Detected Ati %s chipset\n", + devs[j].chipset_name); + + /* Fill in the mode register */ + pci_read_config_dword(pdev, + bridge->capndx+PCI_AGP_STATUS, + &bridge->mode); + + pci_set_drvdata(pdev, bridge); + return agp_add_bridge(bridge); +} + +static void __devexit agp_ati_remove(struct pci_dev *pdev) +{ + struct agp_bridge_data *bridge = pci_get_drvdata(pdev); + + agp_remove_bridge(bridge); + agp_put_bridge(bridge); +} + +static struct pci_device_id agp_ati_pci_table[] = { + { + .class = (PCI_CLASS_BRIDGE_HOST << 8), + .class_mask = ~0, + .vendor = PCI_VENDOR_ID_ATI, + .device = PCI_ANY_ID, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + }, + { } +}; + +MODULE_DEVICE_TABLE(pci, agp_ati_pci_table); + +static struct pci_driver agp_ati_pci_driver = { + .name = "agpgart-ati", + .id_table = agp_ati_pci_table, + .probe = agp_ati_probe, + .remove = agp_ati_remove, +}; + +static int __init agp_ati_init(void) +{ + if (agp_off) + return -EINVAL; + return pci_register_driver(&agp_ati_pci_driver); +} + +static void __exit agp_ati_cleanup(void) +{ + pci_unregister_driver(&agp_ati_pci_driver); +} + +module_init(agp_ati_init); +module_exit(agp_ati_cleanup); + +MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>"); +MODULE_LICENSE("GPL and additional rights"); + |