Linux-2.6.12-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, 216 insertions, 0 deletions

diff --git a/drivers/char/agp/alpha-agp.c b/drivers/char/agp/alpha-agp.c
new file mode 100644
index 00000000000..a072d32005a
--- /dev/null
+++ b/drivers/char/agp/alpha-agp.c
@@ -0,0 +1,216 @@
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/agp_backend.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+
+#include <asm/machvec.h>
+#include <asm/agp_backend.h>
+#include "../../../arch/alpha/kernel/pci_impl.h"
+
+#include "agp.h"
+
+static struct page *alpha_core_agp_vm_nopage(struct vm_area_struct *vma,
+                                             unsigned long address,
+                                             int *type)
+{
+        alpha_agp_info *agp = agp_bridge->dev_private_data;
+        dma_addr_t dma_addr;
+        unsigned long pa;
+        struct page *page;
+
+        dma_addr = address - vma->vm_start + agp->aperture.bus_base;
+        pa = agp->ops->translate(agp, dma_addr);
+
+        if (pa == (unsigned long)-EINVAL) return NULL;  /* no translation */
+        
+        /*
+         * Get the page, inc the use count, and return it
+         */
+        page = virt_to_page(__va(pa));
+        get_page(page);
+        if (type)
+                *type = VM_FAULT_MINOR;
+        return page;
+}
+
+static struct aper_size_info_fixed alpha_core_agp_sizes[] =
+{
+        { 0, 0, 0 }, /* filled in by alpha_core_agp_setup */
+};
+
+struct vm_operations_struct alpha_core_agp_vm_ops = {
+        .nopage = alpha_core_agp_vm_nopage,
+};
+
+
+static int alpha_core_agp_nop(void)
+{
+        /* just return success */
+        return 0;
+}
+
+static int alpha_core_agp_fetch_size(void)
+{
+        return alpha_core_agp_sizes[0].size;
+}
+
+static int alpha_core_agp_configure(void)
+{
+        alpha_agp_info *agp = agp_bridge->dev_private_data;
+        agp_bridge->gart_bus_addr = agp->aperture.bus_base;
+        return 0;
+}
+
+static void alpha_core_agp_cleanup(void)
+{
+        alpha_agp_info *agp = agp_bridge->dev_private_data;
+
+        agp->ops->cleanup(agp);
+}
+
+static void alpha_core_agp_tlbflush(struct agp_memory *mem)
+{
+        alpha_agp_info *agp = agp_bridge->dev_private_data;
+        alpha_mv.mv_pci_tbi(agp->hose, 0, -1);
+}
+
+static void alpha_core_agp_enable(struct agp_bridge_data *bridge, u32 mode)
+{
+        alpha_agp_info *agp = bridge->dev_private_data;
+
+        agp->mode.lw = agp_collect_device_status(bridge, mode,
+                                        agp->capability.lw);
+
+        agp->mode.bits.enable = 1;
+        agp->ops->configure(agp);
+
+        agp_device_command(agp->mode.lw, 0);
+}
+
+static int alpha_core_agp_insert_memory(struct agp_memory *mem, off_t pg_start, 
+                                        int type)
+{
+        alpha_agp_info *agp = agp_bridge->dev_private_data;
+        int num_entries, status;
+        void *temp;
+
+        temp = agp_bridge->current_size;
+        num_entries = A_SIZE_FIX(temp)->num_entries;
+        if ((pg_start + mem->page_count) > num_entries) return -EINVAL;
+
+        status = agp->ops->bind(agp, pg_start, mem);
+        mb();
+        alpha_core_agp_tlbflush(mem);
+
+        return status;
+}
+
+static int alpha_core_agp_remove_memory(struct agp_memory *mem, off_t pg_start, 
+                                        int type)
+{
+        alpha_agp_info *agp = agp_bridge->dev_private_data;
+        int status;
+
+        status = agp->ops->unbind(agp, pg_start, mem);
+        alpha_core_agp_tlbflush(mem);
+        return status;
+}
+
+struct agp_bridge_driver alpha_core_agp_driver = {
+        .owner                  = THIS_MODULE,
+        .aperture_sizes         = alpha_core_agp_sizes,
+        .num_aperture_sizes     = 1,
+        .size_type              = FIXED_APER_SIZE,
+        .cant_use_aperture      = 1,
+        .masks                  = NULL,
+        
+        .fetch_size             = alpha_core_agp_fetch_size,
+        .configure              = alpha_core_agp_configure,
+        .agp_enable             = alpha_core_agp_enable,
+        .cleanup                = alpha_core_agp_cleanup,
+        .tlb_flush              = alpha_core_agp_tlbflush,
+        .mask_memory            = agp_generic_mask_memory,
+        .cache_flush            = global_cache_flush,
+        .create_gatt_table      = alpha_core_agp_nop,
+        .free_gatt_table        = alpha_core_agp_nop,
+        .insert_memory          = alpha_core_agp_insert_memory,
+        .remove_memory          = alpha_core_agp_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,
+};
+
+struct agp_bridge_data *alpha_bridge;
+
+int __init
+alpha_core_agp_setup(void)
+{
+        alpha_agp_info *agp = alpha_mv.agp_info();
+        struct pci_dev *pdev;   /* faked */
+        struct aper_size_info_fixed *aper_size;
+
+        if (!agp)
+                return -ENODEV;
+        if (agp->ops->setup(agp))
+                return -ENODEV;
+
+        /*
+         * Build the aperture size descriptor
+         */
+        aper_size = alpha_core_agp_sizes;
+        aper_size->size = agp->aperture.size / (1024 * 1024);
+        aper_size->num_entries = agp->aperture.size / PAGE_SIZE;
+        aper_size->page_order = __ffs(aper_size->num_entries / 1024);
+
+        /*
+         * Build a fake pci_dev struct
+         */
+        pdev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL);
+        if (!pdev)
+                return -ENOMEM;
+        pdev->vendor = 0xffff;
+        pdev->device = 0xffff;
+        pdev->sysdata = agp->hose;
+
+        alpha_bridge = agp_alloc_bridge();
+        if (!alpha_bridge)
+                goto fail;
+
+        alpha_bridge->driver = &alpha_core_agp_driver;
+        alpha_bridge->vm_ops = &alpha_core_agp_vm_ops;
+        alpha_bridge->current_size = aper_size; /* only 1 size */
+        alpha_bridge->dev_private_data = agp;
+        alpha_bridge->dev = pdev;
+        alpha_bridge->mode = agp->capability.lw;
+
+        printk(KERN_INFO PFX "Detected AGP on hose %d\n", agp->hose->index);
+        return agp_add_bridge(alpha_bridge);
+
+ fail:
+        kfree(pdev);
+        return -ENOMEM;
+}
+
+static int __init agp_alpha_core_init(void)
+{
+        if (agp_off)
+                return -EINVAL;
+        if (alpha_mv.agp_info)
+                return alpha_core_agp_setup();
+        return -ENODEV;
+}
+
+static void __exit agp_alpha_core_cleanup(void)
+{
+        agp_remove_bridge(alpha_bridge);
+        agp_put_bridge(alpha_bridge);
+}
+
+module_init(agp_alpha_core_init);
+module_exit(agp_alpha_core_cleanup);
+
+MODULE_AUTHOR("Jeff Wiedemeier <Jeff.Wiedemeier@hp.com>");
+MODULE_LICENSE("GPL and additional rights");