| 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 | |