1 /* $NetBSD: drm_agp_netbsd.h,v 1.8 2018/08/28 03:41:39 riastradh 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 #define CONFIG_AGP 1
53
54 struct agp_kern_info {
55 struct agp_info aki_info;
56 };
57
58 struct agp_bridge_data {
59 struct agp_softc abd_sc; /* XXX Abstraction violation! */
60 };
61
62 /*
63 * We already have a struct agp_memory, but fortunately it looks like
64 * it may accidentally work out.
65 */
66
67 #if 0
68 struct agp_memory {
69 void *am_cookie;
70 };
71 #endif
72
73 static inline struct agp_bridge_data *
agp_find_bridge(struct pci_dev * pdev __unused)74 agp_find_bridge(struct pci_dev *pdev __unused)
75 {
76 /*
77 * XXX How do we find the agp bridge attached to this
78 * particular PCI device?
79 */
80 return container_of((struct agp_softc *)agp_find_device(0),
81 struct agp_bridge_data, abd_sc);
82 }
83
84 static inline struct agp_bridge_data *
agp_backend_acquire(struct pci_dev * pdev)85 agp_backend_acquire(struct pci_dev *pdev)
86 {
87 struct agp_bridge_data *const bridge = agp_find_bridge(pdev);
88
89 if (bridge == NULL)
90 return NULL;
91
92 /* XXX We lose the error code here. */
93 if (agp_acquire(&bridge->abd_sc) != 0)
94 return NULL;
95
96 return bridge;
97 }
98
99 static inline void
agp_backend_release(struct agp_bridge_data * bridge)100 agp_backend_release(struct agp_bridge_data *bridge)
101 {
102
103 /* XXX We lose the error code here. */
104 (void)agp_release(&bridge->abd_sc);
105 }
106
107 /*
108 * Happily, agp_enable will accidentally DTRT as is in NetBSD in spite
109 * of the name collision, thanks to a curious `void *' argument in its
110 * declaration...
111 */
112
113 #if 0
114 static inline void
115 agp_enable(struct agp_bridge_data *bridge)
116 {
117 ...
118 }
119 #endif
120
121 static inline struct agp_memory *
agp_allocate_memory(struct agp_bridge_data * bridge,size_t npages,uint32_t type)122 agp_allocate_memory(struct agp_bridge_data *bridge, size_t npages,
123 uint32_t type)
124 {
125 return agp_alloc_memory(&bridge->abd_sc, (npages << AGP_PAGE_SHIFT),
126 type);
127 }
128
129 /*
130 * Once again, a happy accident makes agp_free_memory work out.
131 */
132
133 #if 0
134 static inline void
135 agp_free_memory(struct agp_bridge_data *bridge, struct agp_memory *mem)
136 {
137 ...
138 }
139 #endif
140
141 /*
142 * Unfortunately, Linux's agp_bind_memory doesn't require the agp
143 * device as an argument. So we'll have to kludge that up as we go.
144 */
145 #if 0
146 static inline void
147 agp_bind_memory(struct agp_memory *mem, size_t npages)
148 {
149 agp_bind_memory(???, mem, (npages << AGP_PAGE_SHIFT));
150 }
151 #endif
152
153 static inline void
agp_copy_info(struct agp_bridge_data * bridge,struct agp_kern_info * info)154 agp_copy_info(struct agp_bridge_data *bridge, struct agp_kern_info *info)
155 {
156 agp_get_info(bridge, &info->aki_info);
157 }
158
159 static inline int
drm_bind_agp(struct agp_bridge_data * bridge,struct agp_memory * mem,unsigned npages)160 drm_bind_agp(struct agp_bridge_data *bridge, struct agp_memory *mem,
161 unsigned npages)
162 {
163 return agp_bind_memory(&bridge->abd_sc, mem,
164 ((size_t)npages << AGP_PAGE_SHIFT));
165 }
166
167 static inline int
drm_unbind_agp(struct agp_bridge_data * bridge,struct agp_memory * mem)168 drm_unbind_agp(struct agp_bridge_data *bridge, struct agp_memory *mem)
169 {
170 return agp_unbind_memory(&bridge->abd_sc, mem);
171 }
172
173 static inline void
drm_free_agp(struct agp_bridge_data * bridge,struct agp_memory * mem,int npages __unused)174 drm_free_agp(struct agp_bridge_data *bridge, struct agp_memory *mem,
175 int npages __unused)
176 {
177 agp_free_memory(&bridge->abd_sc, mem);
178 }
179
180 #endif /* _DRM_DRM_AGP_NETBSD_H_ */
181