1/*-
2 * Copyright (c) 2011 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Konstantin Belousov under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: releng/10.3/sys/dev/agp/agp_i810.h 235782 2012-05-22 10:59:26Z kib $
30 */
31
32#ifndef AGP_AGP_I810_H
33#define	AGP_AGP_I810_H
34
35#include <sys/param.h>
36#include <sys/sglist.h>
37
38#include <vm/vm.h>
39#include <vm/vm_page.h>
40
41/* Special gtt memory types */
42#define AGP_DCACHE_MEMORY	1
43#define AGP_PHYS_MEMORY		2
44
45/* New caching attributes for gen6/sandybridge */
46#define AGP_USER_CACHED_MEMORY_LLC_MLC (AGP_USER_TYPES + 2)
47#define AGP_USER_UNCACHED_MEMORY (AGP_USER_TYPES + 4)
48
49/* flag for GFDT type */
50#define AGP_USER_CACHED_MEMORY_GFDT (1 << 3)
51
52struct intel_gtt {
53	/* Size of memory reserved for graphics by the BIOS */
54	u_int stolen_size;
55	/* Total number of gtt entries. */
56	u_int gtt_total_entries;
57	/*
58	 * Part of the gtt that is mappable by the cpu, for those
59	 * chips where this is not the full gtt.
60	 */
61	u_int gtt_mappable_entries;
62
63	/*
64	 * Always false.
65	 */
66	u_int do_idle_maps;
67
68	/*
69	 * Share the scratch page dma with ppgtts.
70	 */
71	vm_paddr_t scratch_page_dma;
72};
73
74struct intel_gtt agp_intel_gtt_get(device_t dev);
75int agp_intel_gtt_chipset_flush(device_t dev);
76void agp_intel_gtt_unmap_memory(device_t dev, struct sglist *sg_list);
77void agp_intel_gtt_clear_range(device_t dev, u_int first_entry,
78    u_int num_entries);
79int agp_intel_gtt_map_memory(device_t dev, vm_page_t *pages, u_int num_entries,
80    struct sglist **sg_list);
81void agp_intel_gtt_insert_sg_entries(device_t dev, struct sglist *sg_list,
82    u_int pg_start, u_int flags);
83void agp_intel_gtt_insert_pages(device_t dev, u_int first_entry,
84    u_int num_entries, vm_page_t *pages, u_int flags);
85
86struct intel_gtt intel_gtt_get(void);
87int intel_gtt_chipset_flush(void);
88void intel_gtt_unmap_memory(struct sglist *sg_list);
89void intel_gtt_clear_range(u_int first_entry, u_int num_entries);
90int intel_gtt_map_memory(vm_page_t *pages, u_int num_entries,
91    struct sglist **sg_list);
92void intel_gtt_insert_sg_entries(struct sglist *sg_list, u_int pg_start,
93    u_int flags);
94void intel_gtt_insert_pages(u_int first_entry, u_int num_entries,
95    vm_page_t *pages, u_int flags);
96vm_paddr_t intel_gtt_read_pte_paddr(u_int entry);
97u_int32_t intel_gtt_read_pte(u_int entry);
98device_t intel_gtt_get_bridge_device(void);
99void intel_gtt_write(u_int entry, uint32_t val);
100
101#endif
102