Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 331 insertions, 0 deletions

diff --git a/drivers/char/agp/sgi-agp.c b/drivers/char/agp/sgi-agp.c
new file mode 100644
index 000000000000..4b3eda267976
--- /dev/null
+++ b/drivers/char/agp/sgi-agp.c
@@ -0,0 +1,331 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+/*
+ * SGI TIOCA AGPGART routines.
+ *
+ */
+
+#include <linux/acpi.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/agp_backend.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/tioca_provider.h>
+#include "agp.h"
+
+extern int agp_memory_reserved;
+extern uint32_t tioca_gart_found;
+extern struct list_head tioca_list;
+static struct agp_bridge_data **sgi_tioca_agp_bridges;
+
+/*
+ * The aperature size and related information is set up at TIOCA init time.
+ * Values for this table will be extracted and filled in at
+ * sgi_tioca_fetch_size() time.
+ */
+
+static struct aper_size_info_fixed sgi_tioca_sizes[] = {
+        {0, 0, 0},
+};
+
+static void *sgi_tioca_alloc_page(struct agp_bridge_data *bridge)
+{
+        struct page *page;
+        int nid;
+        struct tioca_kernel *info =
+            (struct tioca_kernel *)bridge->dev_private_data;
+
+        nid = info->ca_closest_node;
+        page = alloc_pages_node(nid, GFP_KERNEL, 0);
+        if (page == NULL) {
+                return 0;
+        }
+
+        get_page(page);
+        SetPageLocked(page);
+        atomic_inc(&agp_bridge->current_memory_agp);
+        return page_address(page);
+}
+
+/*
+ * Flush GART tlb's.  Cannot selectively flush based on memory so the mem
+ * arg is ignored.
+ */
+
+static void sgi_tioca_tlbflush(struct agp_memory *mem)
+{
+        tioca_tlbflush(mem->bridge->dev_private_data);
+}
+
+/*
+ * Given an address of a host physical page, turn it into a valid gart
+ * entry.
+ */
+static unsigned long
+sgi_tioca_mask_memory(struct agp_bridge_data *bridge,
+                      unsigned long addr, int type)
+{
+        return tioca_physpage_to_gart(addr);
+}
+
+static void sgi_tioca_agp_enable(struct agp_bridge_data *bridge, u32 mode)
+{
+        tioca_fastwrite_enable(bridge->dev_private_data);
+}
+
+/*
+ * sgi_tioca_configure() doesn't have anything to do since the base CA driver
+ * has alreay set up the GART.
+ */
+
+static int sgi_tioca_configure(void)
+{
+        return 0;
+}
+
+/*
+ * Determine gfx aperature size.  This has already been determined by the
+ * CA driver init, so just need to set agp_bridge values accordingly.
+ */
+
+static int sgi_tioca_fetch_size(void)
+{
+        struct tioca_kernel *info =
+            (struct tioca_kernel *)agp_bridge->dev_private_data;
+
+        sgi_tioca_sizes[0].size = info->ca_gfxap_size / MB(1);
+        sgi_tioca_sizes[0].num_entries = info->ca_gfxgart_entries;
+
+        return sgi_tioca_sizes[0].size;
+}
+
+static int sgi_tioca_create_gatt_table(struct agp_bridge_data *bridge)
+{
+        struct tioca_kernel *info =
+            (struct tioca_kernel *)bridge->dev_private_data;
+
+        bridge->gatt_table_real = (u32 *) info->ca_gfxgart;
+        bridge->gatt_table = bridge->gatt_table_real;
+        bridge->gatt_bus_addr = info->ca_gfxgart_base;
+
+        return 0;
+}
+
+static int sgi_tioca_free_gatt_table(struct agp_bridge_data *bridge)
+{
+        return 0;
+}
+
+static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
+                                   int type)
+{
+        int num_entries;
+        size_t i;
+        off_t j;
+        void *temp;
+        struct agp_bridge_data *bridge;
+
+        bridge = mem->bridge;
+        if (!bridge)
+                return -EINVAL;
+
+        temp = bridge->current_size;
+
+        switch (bridge->driver->size_type) {
+        case U8_APER_SIZE:
+                num_entries = A_SIZE_8(temp)->num_entries;
+                break;
+        case U16_APER_SIZE:
+                num_entries = A_SIZE_16(temp)->num_entries;
+                break;
+        case U32_APER_SIZE:
+                num_entries = A_SIZE_32(temp)->num_entries;
+                break;
+        case FIXED_APER_SIZE:
+                num_entries = A_SIZE_FIX(temp)->num_entries;
+                break;
+        case LVL2_APER_SIZE:
+                return -EINVAL;
+                break;
+        default:
+                num_entries = 0;
+                break;
+        }
+
+        num_entries -= agp_memory_reserved / PAGE_SIZE;
+        if (num_entries < 0)
+                num_entries = 0;
+
+        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)) {
+                if (*(bridge->gatt_table + j))
+                        return -EBUSY;
+                j++;
+        }
+
+        if (mem->is_flushed == FALSE) {
+                bridge->driver->cache_flush();
+                mem->is_flushed = TRUE;
+        }
+
+        for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
+                *(bridge->gatt_table + j) =
+                    bridge->driver->mask_memory(bridge, mem->memory[i],
+                                                mem->type);
+        }
+
+        bridge->driver->tlb_flush(mem);
+        return 0;
+}
+
+static int sgi_tioca_remove_memory(struct agp_memory *mem, off_t pg_start,
+                                   int type)
+{
+        size_t i;
+        struct agp_bridge_data *bridge;
+
+        bridge = mem->bridge;
+        if (!bridge)
+                return -EINVAL;
+
+        if (type != 0 || mem->type != 0) {
+                return -EINVAL;
+        }
+
+        for (i = pg_start; i < (mem->page_count + pg_start); i++) {
+                *(bridge->gatt_table + i) = 0;
+        }
+
+        bridge->driver->tlb_flush(mem);
+        return 0;
+}
+
+static void sgi_tioca_cache_flush(void)
+{
+}
+
+/*
+ * Cleanup.  Nothing to do as the CA driver owns the GART.
+ */
+
+static void sgi_tioca_cleanup(void)
+{
+}
+
+static struct agp_bridge_data *sgi_tioca_find_bridge(struct pci_dev *pdev)
+{
+        struct agp_bridge_data *bridge;
+
+        list_for_each_entry(bridge, &agp_bridges, list) {
+                if (bridge->dev->bus == pdev->bus)
+                        break;
+        }
+        return bridge;
+}
+
+struct agp_bridge_driver sgi_tioca_driver = {
+        .owner = THIS_MODULE,
+        .size_type = U16_APER_SIZE,
+        .configure = sgi_tioca_configure,
+        .fetch_size = sgi_tioca_fetch_size,
+        .cleanup = sgi_tioca_cleanup,
+        .tlb_flush = sgi_tioca_tlbflush,
+        .mask_memory = sgi_tioca_mask_memory,
+        .agp_enable = sgi_tioca_agp_enable,
+        .cache_flush = sgi_tioca_cache_flush,
+        .create_gatt_table = sgi_tioca_create_gatt_table,
+        .free_gatt_table = sgi_tioca_free_gatt_table,
+        .insert_memory = sgi_tioca_insert_memory,
+        .remove_memory = sgi_tioca_remove_memory,
+        .alloc_by_type = agp_generic_alloc_by_type,
+        .free_by_type = agp_generic_free_by_type,
+        .agp_alloc_page = sgi_tioca_alloc_page,
+        .agp_destroy_page = agp_generic_destroy_page,
+        .cant_use_aperture = 1,
+        .needs_scratch_page = 0,
+        .num_aperture_sizes = 1,
+};
+
+static int __devinit agp_sgi_init(void)
+{
+        unsigned int j;
+        struct tioca_kernel *info;
+        struct pci_dev *pdev = NULL;
+
+        if (tioca_gart_found)
+                printk(KERN_INFO PFX "SGI TIO CA GART driver initialized.\n");
+        else
+                return 0;
+
+        sgi_tioca_agp_bridges =
+            (struct agp_bridge_data **)kmalloc(tioca_gart_found *
+                                               sizeof(struct agp_bridge_data *),
+                                               GFP_KERNEL);
+
+        j = 0;
+        list_for_each_entry(info, &tioca_list, ca_list) {
+                struct list_head *tmp;
+                list_for_each(tmp, info->ca_devices) {
+                        u8 cap_ptr;
+                        pdev = pci_dev_b(tmp);
+                        if (pdev->class != (PCI_CLASS_DISPLAY_VGA << 8))
+                                continue;
+                        cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
+                        if (!cap_ptr)
+                                continue;
+                }
+                sgi_tioca_agp_bridges[j] = agp_alloc_bridge();
+                printk(KERN_INFO PFX "bridge %d = 0x%p\n", j,
+                       sgi_tioca_agp_bridges[j]);
+                if (sgi_tioca_agp_bridges[j]) {
+                        sgi_tioca_agp_bridges[j]->dev = pdev;
+                        sgi_tioca_agp_bridges[j]->dev_private_data = info;
+                        sgi_tioca_agp_bridges[j]->driver = &sgi_tioca_driver;
+                        sgi_tioca_agp_bridges[j]->gart_bus_addr =
+                            info->ca_gfxap_base;
+                        sgi_tioca_agp_bridges[j]->mode = (0x7D << 24) | /* 126 requests */
+                            (0x1 << 9) |        /* SBA supported */
+                            (0x1 << 5) |        /* 64-bit addresses supported */
+                            (0x1 << 4) |        /* FW supported */
+                            (0x1 << 3) |        /* AGP 3.0 mode */
+                            0x2;        /* 8x transfer only */
+                        sgi_tioca_agp_bridges[j]->current_size =
+                            sgi_tioca_agp_bridges[j]->previous_size =
+                            (void *)&sgi_tioca_sizes[0];
+                        agp_add_bridge(sgi_tioca_agp_bridges[j]);
+                }
+                j++;
+        }
+
+        agp_find_bridge = &sgi_tioca_find_bridge;
+        return 0;
+}
+
+static void __devexit agp_sgi_cleanup(void)
+{
+        if(sgi_tioca_agp_bridges)
+                kfree(sgi_tioca_agp_bridges);
+        sgi_tioca_agp_bridges=NULL;
+}
+
+module_init(agp_sgi_init);
+module_exit(agp_sgi_cleanup);
+
+MODULE_LICENSE("GPL and additional rights");