summaryrefslogtreecommitdiff
path: root/sys/dev/pci/agpvar.h
blob: 5bc6a6ee5fe95048a1eef71897b05927f12af085 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
/*	$OpenBSD: agpvar.h,v 1.20 2009/06/06 06:02:44 oga Exp $	*/
/*	$NetBSD: agpvar.h,v 1.4 2001/10/01 21:54:48 fvdl Exp $	*/

/*-
 * Copyright (c) 2000 Doug Rabson
 * All rights reserved.
 *
 * 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: src/sys/pci/agppriv.h,v 1.3 2000/07/12 10:13:04 dfr Exp $
 */

#ifndef _PCI_AGPVAR_H_
#define _PCI_AGPVAR_H_

#include <sys/rwlock.h>

/* #define	AGP_DEBUG */
#ifdef AGP_DEBUG
#define AGP_DPF(fmt, arg...) do { printf("agp: " fmt ,##arg); } while (0)
#else
#define AGP_DPF(fmt, arg...) do {} while (0)
#endif

#define AGPUNIT(x)	minor(x)

struct agp_attach_args {
	char			*aa_busname;
	struct pci_attach_args	*aa_pa;
};

struct agpbus_attach_args {
	char				*aa_busname; /*so pci doesn't conflict*/
        struct pci_attach_args		*aa_pa;
	const struct agp_methods	*aa_methods;
	bus_addr_t			 aa_apaddr;
	bus_size_t			 aa_apsize;
};

enum agp_acquire_state {
	AGP_ACQUIRE_FREE,
	AGP_ACQUIRE_USER,
	AGP_ACQUIRE_KERNEL
};

/*
 * Data structure to describe an AGP memory allocation.
 */
TAILQ_HEAD(agp_memory_list, agp_memory);
struct agp_memory {
	TAILQ_ENTRY(agp_memory)	 am_link;	/* wiring for the tailq */
	bus_dmamap_t		 am_dmamap;
	bus_dma_segment_t	*am_dmaseg;
	bus_size_t		 am_size;	/* number of bytes allocated */
	bus_size_t		 am_offset;	/* page offset if bound */
	paddr_t			 am_physical;
	int			 am_id;		/* unique id for block */
	int			 am_is_bound;	/* non-zero if bound */
	int			 am_nseg;
	int			 am_type;	/* chipset specific type */
};

/*
 * This structure is used to query the state of the AGP system.
 */
struct agp_info {
	u_int32_t       ai_mode;
	bus_addr_t      ai_aperture_base;
	bus_size_t      ai_aperture_size;
	vsize_t         ai_memory_allowed;
	vsize_t         ai_memory_used;
	u_int32_t       ai_devid;
};

struct agp_memory_info {
        vsize_t         ami_size;       /* size in bytes */
        bus_addr_t      ami_physical;   /* bogus hack for i810 */
        off_t           ami_offset;     /* page offset if bound */
        int             ami_is_bound;   /* non-zero if bound */
};

struct agp_methods {
	void	(*bind_page)(void *, bus_addr_t, paddr_t, int);
	void	(*unbind_page)(void *, bus_addr_t);
	void	(*flush_tlb)(void *);
	void	(*dma_sync)(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
		    bus_size_t, int);
	int	(*enable)(void *, u_int32_t mode);
	struct agp_memory *
		(*alloc_memory)(void *, int, vsize_t);
	int	(*free_memory)(void *, struct agp_memory *);
	int	(*bind_memory)(void *, struct agp_memory *, bus_size_t);
	int	(*unbind_memory)(void *, struct agp_memory *);
};

/*
 * All chipset drivers must have this at the start of their softc.
 */
struct agp_softc {
	struct device			 sc_dev;

	struct agp_memory_list		 sc_memory; 	/* mem blocks */
	struct rwlock			 sc_lock;	/* GATT access lock */
	const struct agp_methods 	*sc_methods;	/* callbacks */
	void				*sc_chipc;	/* chipset softc */

	bus_dma_tag_t			 sc_dmat;
	pci_chipset_tag_t		 sc_pc;
	pcitag_t			 sc_pcitag;
	bus_addr_t			 sc_apaddr;
	bus_size_t			 sc_apsize;
	pcireg_t			 sc_id;

	int				 sc_opened;
	int				 sc_capoff;			
	int				 sc_nextid;	/* next mem block id */
	enum agp_acquire_state		 sc_state;

	u_int32_t			 sc_maxmem;	/* mem upper bound */
	u_int32_t			 sc_allocated;	/* amount allocated */
};

struct agp_gatt {
	u_int32_t	ag_entries;
	u_int32_t	*ag_virtual;
	bus_addr_t	ag_physical;
	bus_dmamap_t	ag_dmamap;
	bus_dma_segment_t ag_dmaseg;
	size_t		ag_size;
};

/*
 * Functions private to the AGP code.
 */
struct device	*agp_attach_bus(struct pci_attach_args *,
		     const struct agp_methods *, bus_addr_t, bus_size_t,
		     struct device *);
struct agp_gatt *
	agp_alloc_gatt(bus_dma_tag_t, u_int32_t);
void	agp_free_gatt(bus_dma_tag_t, struct agp_gatt *);
void	agp_flush_cache(void);
int	agp_generic_bind_memory(struct agp_softc *, struct agp_memory *,
	    bus_size_t);
int	agp_generic_unbind_memory(struct agp_softc *, struct agp_memory *);

int	agp_alloc_dmamem(bus_dma_tag_t, size_t, bus_dmamap_t *,
	    bus_addr_t *, bus_dma_segment_t *);
void	agp_free_dmamem(bus_dma_tag_t, size_t, bus_dmamap_t,
	    bus_dma_segment_t *);
int	agpdev_print(void *, const char *);
int	agpbus_probe(struct agp_attach_args *aa);


int	agp_bus_dma_init(struct agp_softc *, bus_addr_t, bus_addr_t,
	    bus_dma_tag_t *);
void	agp_bus_dma_destroy(struct agp_softc *, bus_dma_tag_t);
void	agp_bus_dma_set_alignment(bus_dma_tag_t, bus_dmamap_t,
	    u_long);
/*
 * Kernel API
 */
/*
 * Find the AGP device and return it.
 */
void	*agp_find_device(int);

/*
 * Return the current owner of the AGP chipset.
 */
enum	 agp_acquire_state agp_state(void *);

/*
 * Query the state of the AGP system.
 */
void	 agp_get_info(void *, struct agp_info *);

/*
 * Acquire the AGP chipset for use by the kernel. Returns EBUSY if the
 * AGP chipset is already acquired by another user.
 */
int	 agp_acquire(void *);

/*
 * Release the AGP chipset.
 */
int	 agp_release(void *);

/*
 * Enable the agp hardware with the relavent mode. The mode bits are
 * defined in <dev/pci/agpreg.h>
 */
int	 agp_enable(void *, u_int32_t);

/*
 * Allocate physical memory suitable for mapping into the AGP
 * aperture.  The value returned is an opaque handle which can be
 * passed to agp_bind(), agp_unbind() or agp_deallocate().
 */
void	*agp_alloc_memory(void *, int, vsize_t);

/*
 * Free memory which was allocated with agp_allocate().
 */
void	 agp_free_memory(void *, void *);

/*
 * Bind memory allocated with agp_allocate() at a given offset within
 * the AGP aperture. Returns EINVAL if the memory is already bound or
 * the offset is not at an AGP page boundary.
 */
int	 agp_bind_memory(void *, void *, off_t);

/*
 * Unbind memory from the AGP aperture. Returns EINVAL if the memory
 * is not bound.
 */
int	 agp_unbind_memory(void *, void *);

/*
 * Retrieve information about a memory block allocated with
 * agp_alloc_memory().
 */
void	 agp_memory_info(void *, void *, struct agp_memory_info *);

#endif /* !_PCI_AGPVAR_H_ */