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
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
/* $OpenBSD: agpvar.h,v 1.30 2014/03/26 14:41:41 mpi 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_
/* #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)
/* we can't use the BUS_DMA_NOCACHE here or it won't get mapped via the gtt */
#define BUS_DMA_GTT_NOCACHE (1 << 30)
#define BUS_DMA_GTT_CACHE_LLC (1 << 29)
#define BUS_DMA_GTT_CACHE_LLC_MLC (1 << 28)
#define BUS_DMA_GTT_WRAPAROUND (1 << 27)
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;
caddr_t am_kva; /* kva if mapped */
u_int32_t am_mapref; /* mapping reference count */
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 *);
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;
bus_space_tag_t sc_memt;
pci_chipset_tag_t sc_pc;
pcitag_t sc_pcitag;
bus_addr_t sc_apaddr;
bus_size_t sc_apsize;
uint32_t sc_stolen_entries;
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;
};
struct agp_map;
/*
* 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);
void agp_flush_cache_range(vaddr_t, vsize_t);
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_init_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, struct
agp_map **);
void agp_destroy_map(struct agp_map *);
int agp_map_subregion(struct agp_map *, bus_size_t, bus_size_t,
bus_space_handle_t *);
void agp_unmap_subregion(struct agp_map *, bus_space_handle_t,
bus_size_t);
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);
void *agp_map(struct agp_softc *, bus_addr_t, bus_size_t,
bus_space_handle_t *);
void agp_unmap(struct agp_softc *, void *, size_t, bus_space_handle_t);
paddr_t agp_mmap(struct agp_softc *, off_t, int);
/*
* 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_ */
|
