FreeBSD/Linux Kernel Cross Reference
sys/dev/agp/agp_i810.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2011 The FreeBSD Foundation
      * All rights reserved.
      *
      * This software was developed by Konstantin Belousov under sponsorship from
      * the FreeBSD Foundation.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef AGP_AGP_I810_H
    #define AGP_AGP_I810_H
    
    #include <sys/param.h>
    #include <sys/rman.h>
    #include <sys/sglist.h>
    
    #include <vm/vm.h>
    #include <vm/vm_page.h>
    
    /* Special gtt memory types */
    #define AGP_DCACHE_MEMORY       1
    #define AGP_PHYS_MEMORY         2
    
    /* New caching attributes for gen6/sandybridge */
    #define AGP_USER_CACHED_MEMORY_LLC_MLC (AGP_USER_TYPES + 2)
    #define AGP_USER_UNCACHED_MEMORY (AGP_USER_TYPES + 4)
    
    /* flag for GFDT type */
    #define AGP_USER_CACHED_MEMORY_GFDT (1 << 3)
    
    struct intel_gtt {
            /* Size of memory reserved for graphics by the BIOS */
            unsigned int stolen_size;
            /* Total number of gtt entries. */
            unsigned int gtt_total_entries;
            /* Part of the gtt that is mappable by the cpu, for those chips where
             * this is not the full gtt. */
            unsigned int gtt_mappable_entries;
            /* Whether i915 needs to use the dmar apis or not. */
            unsigned int needs_dmar : 1;
            /* Whether we idle the gpu before mapping/unmapping */
            unsigned int do_idle_maps : 1;
            /* Share the scratch page dma with ppgtts. */
            vm_paddr_t scratch_page_dma;
            vm_page_t scratch_page;
            /* for ppgtt PDE access */
            uint32_t *gtt;
            /* needed for ioremap in drm/i915 */
            bus_addr_t gma_bus_addr;
    };
    
    struct intel_gtt agp_intel_gtt_get(device_t dev);
    int agp_intel_gtt_chipset_flush(device_t dev);
    void agp_intel_gtt_unmap_memory(device_t dev, struct sglist *sg_list);
    void agp_intel_gtt_clear_range(device_t dev, u_int first_entry,
        u_int num_entries);
    int agp_intel_gtt_map_memory(device_t dev, vm_page_t *pages, u_int num_entries,
        struct sglist **sg_list);
    void agp_intel_gtt_insert_sg_entries(device_t dev, struct sglist *sg_list,
        u_int pg_start, u_int flags);
    void agp_intel_gtt_insert_pages(device_t dev, u_int first_entry,
        u_int num_entries, vm_page_t *pages, u_int flags);
    
    struct intel_gtt *intel_gtt_get(void);
    int intel_gtt_chipset_flush(void);
    void intel_gtt_unmap_memory(struct sglist *sg_list);
    void intel_gtt_clear_range(u_int first_entry, u_int num_entries);
    void intel_gtt_install_pte(u_int index, vm_paddr_t addr, u_int flags);
    int intel_gtt_map_memory(vm_page_t *pages, u_int num_entries,
        struct sglist **sg_list);
    void intel_gtt_insert_sg_entries(struct sglist *sg_list, u_int pg_start,
        u_int flags);
    void intel_gtt_insert_pages(u_int first_entry, u_int num_entries,
        vm_page_t *pages, u_int flags);
    vm_paddr_t intel_gtt_read_pte_paddr(u_int entry);
   u_int32_t intel_gtt_read_pte(u_int entry);
   device_t intel_gtt_get_bridge_device(void);
   void intel_gtt_write(u_int entry, uint32_t val);
   
   #endif

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