--- /dev/null
+#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 int alpha_core_agp_vm_fault(struct vm_area_struct *vma,
+ struct vm_fault *vmf)
+{
+ alpha_agp_info *agp = agp_bridge->dev_private_data;
+ dma_addr_t dma_addr;
+ unsigned long pa;
+ struct page *page;
+
+ dma_addr = (unsigned long)vmf->virtual_address - vma->vm_start
+ + agp->aperture.bus_base;
+ pa = agp->ops->translate(agp, dma_addr);
+
+ if (pa == (unsigned long)-EINVAL)
+ return VM_FAULT_SIGBUS; /* no translation */
+
+ /*
+ * Get the page, inc the use count, and return it
+ */
+ page = virt_to_page(__va(pa));
+ get_page(page);
+ vmf->page = page;
+ return 0;
+}
+
+static struct aper_size_info_fixed alpha_core_agp_sizes[] =
+{
+ { 0, 0, 0 }, /* filled in by alpha_core_agp_setup */
+};
+
+static const struct vm_operations_struct alpha_core_agp_vm_ops = {
+ .fault = alpha_core_agp_vm_fault,
+};
+
+
+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, false);
+}
+
+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;
+
+ if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES)
+ return -EINVAL;
+
+ 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;
+}
+
+static int alpha_core_agp_create_free_gatt_table(struct agp_bridge_data *a)
+{
+ return 0;
+}
+
+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 = true,
+ .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_create_free_gatt_table,
+ .free_gatt_table = alpha_core_agp_create_free_gatt_table,
+ .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_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,
+};
+
+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 = pci_alloc_dev(NULL);
+ 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");
Code Review / kvmfornfv.git / blobdiff