xref: /freebsd/sys/dev/agp/agp_i810.h (revision 641a6cfb86023499caafe26a4d821a0b885cf00b)
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  * $FreeBSD$
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 
52 struct 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 
74 struct intel_gtt agp_intel_gtt_get(device_t dev);
75 int agp_intel_gtt_chipset_flush(device_t dev);
76 void agp_intel_gtt_unmap_memory(device_t dev, struct sglist *sg_list);
77 void agp_intel_gtt_clear_range(device_t dev, u_int first_entry,
78     u_int num_entries);
79 int agp_intel_gtt_map_memory(device_t dev, vm_page_t *pages, u_int num_entries,
80     struct sglist **sg_list);
81 void agp_intel_gtt_insert_sg_entries(device_t dev, struct sglist *sg_list,
82     u_int pg_start, u_int flags);
83 void 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 
86 struct intel_gtt intel_gtt_get(void);
87 int intel_gtt_chipset_flush(void);
88 void intel_gtt_unmap_memory(struct sglist *sg_list);
89 void intel_gtt_clear_range(u_int first_entry, u_int num_entries);
90 int intel_gtt_map_memory(vm_page_t *pages, u_int num_entries,
91     struct sglist **sg_list);
92 void intel_gtt_insert_sg_entries(struct sglist *sg_list, u_int pg_start,
93     u_int flags);
94 void intel_gtt_insert_pages(u_int first_entry, u_int num_entries,
95     vm_page_t *pages, u_int flags);
96 vm_paddr_t intel_gtt_read_pte_paddr(u_int entry);
97 u_int32_t intel_gtt_read_pte(u_int entry);
98 device_t intel_gtt_get_bridge_device(void);
99 void intel_gtt_write(u_int entry, uint32_t val);
100 
101 #endif
102