1 | /* $NetBSD: drm_agp_netbsd.h,v 1.6 2015/10/17 21:27:02 jmcneill Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2013 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Taylor R. Campbell. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #ifndef _DRM_DRM_AGP_NETBSD_H_ |
33 | #define _DRM_DRM_AGP_NETBSD_H_ |
34 | |
35 | /* |
36 | * XXX XXX XXX BEWARE! This file is full of abstraction violations |
37 | * that are ruthlessly exploited for their value as happy accidents! |
38 | * You have been warned! |
39 | */ |
40 | |
41 | #include <sys/agpio.h> |
42 | |
43 | #include <dev/pci/pcivar.h> /* XXX include order botch */ |
44 | #include <dev/pci/agpreg.h> |
45 | #include <dev/pci/agpvar.h> |
46 | |
47 | #include <linux/kernel.h> |
48 | #include <linux/pci.h> |
49 | |
50 | #define PCI_AGP_COMMAND_FW AGPCMD_FWEN |
51 | |
52 | #if defined(__i386__) || defined(__x86_64__) |
53 | #if defined(_KERNEL_OPT) |
54 | #include "agp.h" |
55 | #else |
56 | #define NAGP 1 |
57 | #endif |
58 | #if NAGP > 0 |
59 | #define __OS_HAS_AGP 1 |
60 | #endif |
61 | __CTASSERT(PAGE_SIZE == AGP_PAGE_SIZE); |
62 | __CTASSERT(PAGE_SHIFT == AGP_PAGE_SHIFT); |
63 | #endif |
64 | |
65 | struct agp_kern_info { |
66 | struct agp_info aki_info; |
67 | }; |
68 | |
69 | struct agp_bridge_data { |
70 | struct agp_softc abd_sc; /* XXX Abstraction violation! */ |
71 | }; |
72 | |
73 | /* |
74 | * We already have a struct agp_memory, but fortunately it looks like |
75 | * it may accidentally work out. |
76 | */ |
77 | |
78 | #if 0 |
79 | struct agp_memory { |
80 | void *am_cookie; |
81 | }; |
82 | #endif |
83 | |
84 | static inline struct agp_bridge_data * |
85 | agp_find_bridge(struct pci_dev *pdev __unused) |
86 | { |
87 | /* |
88 | * XXX How do we find the agp bridge attached to this |
89 | * particular PCI device? |
90 | */ |
91 | return container_of((struct agp_softc *)agp_find_device(0), |
92 | struct agp_bridge_data, abd_sc); |
93 | } |
94 | |
95 | static inline struct agp_bridge_data * |
96 | agp_backend_acquire(struct pci_dev *pdev) |
97 | { |
98 | struct agp_bridge_data *const bridge = agp_find_bridge(pdev); |
99 | |
100 | if (bridge == NULL) |
101 | return NULL; |
102 | |
103 | /* XXX We lose the error code here. */ |
104 | if (agp_acquire(&bridge->abd_sc) != 0) |
105 | return NULL; |
106 | |
107 | return bridge; |
108 | } |
109 | |
110 | static inline void |
111 | agp_backend_release(struct agp_bridge_data *bridge) |
112 | { |
113 | |
114 | /* XXX We lose the error code here. */ |
115 | (void)agp_release(&bridge->abd_sc); |
116 | } |
117 | |
118 | /* |
119 | * Happily, agp_enable will accidentally DTRT as is in NetBSD in spite |
120 | * of the name collision, thanks to a curious `void *' argument in its |
121 | * declaration... |
122 | */ |
123 | |
124 | #if 0 |
125 | static inline void |
126 | agp_enable(struct agp_bridge_data *bridge) |
127 | { |
128 | ... |
129 | } |
130 | #endif |
131 | |
132 | static inline struct agp_memory * |
133 | agp_allocate_memory(struct agp_bridge_data *bridge, size_t npages, |
134 | uint32_t type) |
135 | { |
136 | return agp_alloc_memory(&bridge->abd_sc, (npages << AGP_PAGE_SHIFT), |
137 | type); |
138 | } |
139 | |
140 | /* |
141 | * Once again, a happy accident makes agp_free_memory work out. |
142 | */ |
143 | |
144 | #if 0 |
145 | static inline void |
146 | agp_free_memory(struct agp_bridge_data *bridge, struct agp_memory *mem) |
147 | { |
148 | ... |
149 | } |
150 | #endif |
151 | |
152 | /* |
153 | * Unfortunately, Linux's agp_bind_memory doesn't require the agp |
154 | * device as an argument. So we'll have to kludge that up as we go. |
155 | */ |
156 | #if 0 |
157 | static inline void |
158 | agp_bind_memory(struct agp_memory *mem, size_t npages) |
159 | { |
160 | agp_bind_memory(???, mem, (npages << AGP_PAGE_SHIFT)); |
161 | } |
162 | #endif |
163 | |
164 | static inline void |
165 | agp_copy_info(struct agp_bridge_data *bridge, struct agp_kern_info *info) |
166 | { |
167 | agp_get_info(bridge, &info->aki_info); |
168 | } |
169 | |
170 | static inline int |
171 | drm_bind_agp(struct agp_bridge_data *bridge, struct agp_memory *mem, |
172 | unsigned npages) |
173 | { |
174 | return agp_bind_memory(&bridge->abd_sc, mem, |
175 | ((size_t)npages << AGP_PAGE_SHIFT)); |
176 | } |
177 | |
178 | static inline int |
179 | drm_unbind_agp(struct agp_bridge_data *bridge, struct agp_memory *mem) |
180 | { |
181 | return agp_unbind_memory(&bridge->abd_sc, mem); |
182 | } |
183 | |
184 | static inline void |
185 | drm_free_agp(struct agp_bridge_data *bridge, struct agp_memory *mem, |
186 | int npages __unused) |
187 | { |
188 | agp_free_memory(&bridge->abd_sc, mem); |
189 | } |
190 | |
191 | #endif /* _DRM_DRM_AGP_NETBSD_H_ */ |
192 | |