--- /dev/null
+/*
+ * ATi AGPGART routines.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/agp_backend.h>
+#include <asm/agp.h>
+#include "agp.h"
+
+#define ATI_GART_MMBASE_BAR 1
+#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 const 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}
+};
+
+
+struct ati_page_map {
+ unsigned long *real;
+ unsigned long __iomem *remapped;
+};
+
+static struct _ati_generic_private {
+ volatile u8 __iomem *registers;
+ struct ati_page_map **gatt_pages;
+ int num_tables;
+} ati_generic_private;
+
+static int ati_create_page_map(struct 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;
+
+ set_memory_uc((unsigned long)page_map->real, 1);
+ err = map_page_into_agp(virt_to_page(page_map->real));
+ page_map->remapped = page_map->real;
+
+ 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(struct ati_page_map *page_map)
+{
+ unmap_page_from_agp(virt_to_page(page_map->real));
+ set_memory_wb((unsigned long)page_map->real, 1);
+ free_page((unsigned long) page_map->real);
+}
+
+
+static void ati_free_gatt_pages(void)
+{
+ int i;
+ struct ati_page_map **tables;
+ struct 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)
+{
+ struct ati_page_map **tables;
+ struct ati_page_map *entry;
+ int retval = 0;
+ int i;
+
+ tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL);
+ if (tables == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < nr_tables; i++) {
+ entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
+ tables[i] = entry;
+ if (entry == NULL) {
+ retval = -ENOMEM;
+ break;
+ }
+ retval = ati_create_page_map(entry);
+ if (retval != 0)
+ break;
+ }
+ ati_generic_private.num_tables = i;
+ 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)
+{
+ phys_addr_t reg;
+ u32 temp;
+
+ /* Get the memory mapped registers */
+ reg = pci_resource_start(agp_bridge->dev, ATI_GART_MMBASE_BAR);
+ ati_generic_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
+
+ if (!ati_generic_private.registers)
+ return -ENOMEM;
+
+ 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 to */
+ /*
+ agp_bridge.gart_bus_addr = pci_bus_address(agp_bridge.dev,
+ AGP_APERTURE_BAR);
+ 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, PCI_COMMAND, &temp);
+ pci_write_config_dword(agp_bridge->dev, PCI_COMMAND, 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;
+}
+
+
+#ifdef CONFIG_PM
+static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
+{
+ pci_save_state(dev);
+ pci_set_power_state(dev, PCI_D3hot);
+
+ return 0;
+}
+
+static int agp_ati_resume(struct pci_dev *dev)
+{
+ pci_set_power_state(dev, PCI_D0);
+ pci_restore_state(dev);
+
+ return ati_configure();
+}
+#endif
+
+/*
+ *Since we don't need contiguous 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;
+ int mask_type;
+
+ num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
+
+ mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
+ if (mask_type != 0 || type != mem->type)
+ return -EINVAL;
+
+ if (mem->page_count == 0)
+ return 0;
+
+ 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) {
+ /*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,
+ page_to_phys(mem->pages[i]),
+ mem->type),
+ cur_gatt+GET_GATT_OFF(addr));
+ }
+ readl(GET_GATT(agp_bridge->gart_bus_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;
+ int mask_type;
+
+ mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
+ if (mask_type != 0 || type != mem->type)
+ return -EINVAL;
+
+ if (mem->page_count == 0)
+ return 0;
+
+ 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(GET_GATT(agp_bridge->gart_bus_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;
+ struct ati_page_map page_dir;
+ unsigned long __iomem *cur_gatt;
+ 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_phys(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
+ */
+ addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
+ agp_bridge->gart_bus_addr = addr;
+
+ /* Calculate the agp offset */
+ for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
+ writel(virt_to_phys(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. */
+ }
+
+ for (i = 0; i < value->num_entries; 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));
+ }
+
+ return 0;
+}
+
+static int ati_free_gatt_table(struct agp_bridge_data *bridge)
+{
+ struct 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;
+}
+
+static const struct agp_bridge_driver ati_generic_bridge = {
+ .owner = THIS_MODULE,
+ .aperture_sizes = ati_generic_sizes,
+ .size_type = LVL2_APER_SIZE,
+ .num_aperture_sizes = 7,
+ .needs_scratch_page = true,
+ .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_alloc_pages = agp_generic_alloc_pages,
+ .agp_destroy_page = agp_generic_destroy_page,
+ .agp_destroy_pages = agp_generic_destroy_pages,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
+};
+
+
+static struct agp_device_ids ati_agp_device_ids[] =
+{
+ {
+ .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",
+ },
+ {
+ .device_id = PCI_DEVICE_ID_ATI_RS350_133,
+ .chipset_name = "IGP9000/M",
+ },
+ {
+ .device_id = PCI_DEVICE_ID_ATI_RS350_200,
+ .chipset_name = "IGP9100/M",
+ },
+ { }, /* dummy final entry, always present */
+};
+
+static int 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;
+ }
+
+ dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
+ pdev->vendor, 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;
+
+ dev_info(&pdev->dev, "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 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,
+#ifdef CONFIG_PM
+ .suspend = agp_ati_suspend,
+ .resume = agp_ati_resume,
+#endif
+};
+
+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");
+MODULE_LICENSE("GPL and additional rights");
+
Code Review / kvmfornfv.git / blobdiff