// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2001-2003 SuSE Labs. * Distributed under the GNU public license, v2. * * This is a GART driver for the AMD Opteron/Athlon64 on-CPU northbridge. * It also includes support for the AMD 8151 AGP bridge, * although it doesn't actually do much, as all the real * work is done in the northbridge(s). */ #include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/agp_backend.h> #include <linux/mmzone.h> #include <asm/page.h> /* PAGE_SIZE */ #include <asm/e820/api.h> #include <asm/amd_nb.h> #include <asm/gart.h> #include "agp.h" /* NVIDIA K8 registers */ #define NVIDIA_X86_64_0_APBASE … #define NVIDIA_X86_64_1_APBASE1 … #define NVIDIA_X86_64_1_APLIMIT1 … #define NVIDIA_X86_64_1_APSIZE … #define NVIDIA_X86_64_1_APBASE2 … #define NVIDIA_X86_64_1_APLIMIT2 … /* ULi K8 registers */ #define ULI_X86_64_BASE_ADDR … #define ULI_X86_64_HTT_FEA_REG … #define ULI_X86_64_ENU_SCR_REG … static struct resource *aperture_resource; static bool __initdata agp_try_unsupported = …; static int agp_bridges_found; static void amd64_tlbflush(struct agp_memory *temp) { … } static int amd64_insert_memory(struct agp_memory *mem, off_t pg_start, int type) { … } /* * This hack alters the order element according * to the size of a long. It sucks. I totally disown this, even * though it does appear to work for the most part. */ static struct aper_size_info_32 amd64_aperture_sizes[7] = …; /* * Get the current Aperture size from the x86-64. * Note, that there may be multiple x86-64's, but we just return * the value from the first one we find. The set_size functions * keep the rest coherent anyway. Or at least should do. */ static int amd64_fetch_size(void) { … } /* * In a multiprocessor x86-64 system, this function gets * called once for each CPU. */ static u64 amd64_configure(struct pci_dev *hammer, u64 gatt_table) { … } static const struct aper_size_info_32 amd_8151_sizes[7] = …; static int amd_8151_configure(void) { … } static void amd64_cleanup(void) { … } static const struct agp_bridge_driver amd_8151_driver = …; /* Some basic sanity checks for the aperture. */ static int agp_aperture_valid(u64 aper, u32 size) { … } /* * W*s centric BIOS sometimes only set up the aperture in the AGP * bridge, not the northbridge. On AMD64 this is handled early * in aperture.c, but when IOMMU is not enabled or we run * on a 32bit kernel this needs to be redone. * Unfortunately it is impossible to fix the aperture here because it's too late * to allocate that much memory. But at least error out cleanly instead of * crashing. */ static int fix_northbridge(struct pci_dev *nb, struct pci_dev *agp, u16 cap) { … } static int cache_nbs(struct pci_dev *pdev, u32 cap_ptr) { … } /* Handle AMD 8151 quirks */ static void amd8151_init(struct pci_dev *pdev, struct agp_bridge_data *bridge) { … } static const struct aper_size_info_32 uli_sizes[7] = …; static int uli_agp_init(struct pci_dev *pdev) { … } static const struct aper_size_info_32 nforce3_sizes[5] = …; /* Handle shadow device of the Nvidia NForce3 */ /* CHECK-ME original 2.4 version set up some IORRs. Check if that is needed. */ static int nforce3_agp_init(struct pci_dev *pdev) { … } static int agp_amd64_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { … } static void agp_amd64_remove(struct pci_dev *pdev) { … } static int agp_amd64_resume(struct device *dev) { … } static const struct pci_device_id agp_amd64_pci_table[] = …; MODULE_DEVICE_TABLE(pci, agp_amd64_pci_table); static const struct pci_device_id agp_amd64_pci_promisc_table[] = …; static DEFINE_SIMPLE_DEV_PM_OPS(agp_amd64_pm_ops, NULL, agp_amd64_resume); static struct pci_driver agp_amd64_pci_driver = …; /* Not static due to IOMMU code calling it early. */ int __init agp_amd64_init(void) { … } static int __init agp_amd64_mod_init(void) { … } static void __exit agp_amd64_cleanup(void) { … } module_init(…) …; module_exit(agp_amd64_cleanup); MODULE_AUTHOR(…) …; module_param(agp_try_unsupported, bool, 0); MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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