drm_legacy.h revision 1.2
1 /* $NetBSD: drm_legacy.h,v 1.2 2018/08/27 04:58:37 riastradh Exp $ */ 2 3 #ifndef __DRM_DRM_LEGACY_H__ 4 #define __DRM_DRM_LEGACY_H__ 5 6 /* 7 * Legacy driver interfaces for the Direct Rendering Manager 8 * 9 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 10 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 11 * Copyright (c) 2009-2010, Code Aurora Forum. 12 * All rights reserved. 13 * Copyright 2014 Intel Corporation 14 * Daniel Vetter <daniel.vetter (at) ffwll.ch> 15 * 16 * Author: Rickard E. (Rik) Faith <faith (at) valinux.com> 17 * Author: Gareth Hughes <gareth (at) valinux.com> 18 * 19 * Permission is hereby granted, free of charge, to any person obtaining a 20 * copy of this software and associated documentation files (the "Software"), 21 * to deal in the Software without restriction, including without limitation 22 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 23 * and/or sell copies of the Software, and to permit persons to whom the 24 * Software is furnished to do so, subject to the following conditions: 25 * 26 * The above copyright notice and this permission notice (including the next 27 * paragraph) shall be included in all copies or substantial portions of the 28 * Software. 29 * 30 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 31 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 32 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 33 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 34 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 35 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 36 * OTHER DEALINGS IN THE SOFTWARE. 37 */ 38 39 40 /* 41 * Legacy Support for palateontologic DRM drivers 42 * 43 * If you add a new driver and it uses any of these functions or structures, 44 * you're doing it terribly wrong. 45 */ 46 47 /** 48 * DMA buffer. 49 */ 50 struct drm_buf { 51 int idx; /**< Index into master buflist */ 52 int total; /**< Buffer size */ 53 int order; /**< log-base-2(total) */ 54 int used; /**< Amount of buffer in use (for DMA) */ 55 unsigned long offset; /**< Byte offset (used internally) */ 56 void *address; /**< Address of buffer */ 57 unsigned long bus_address; /**< Bus address of buffer */ 58 struct drm_buf *next; /**< Kernel-only: used for free list */ 59 __volatile__ int waiting; /**< On kernel DMA queue */ 60 __volatile__ int pending; /**< On hardware DMA queue */ 61 struct drm_file *file_priv; /**< Private of holding file descr */ 62 int context; /**< Kernel queue for this buffer */ 63 int while_locked; /**< Dispatch this buffer while locked */ 64 enum { 65 DRM_LIST_NONE = 0, 66 DRM_LIST_FREE = 1, 67 DRM_LIST_WAIT = 2, 68 DRM_LIST_PEND = 3, 69 DRM_LIST_PRIO = 4, 70 DRM_LIST_RECLAIM = 5 71 } list; /**< Which list we're on */ 72 73 int dev_priv_size; /**< Size of buffer private storage */ 74 void *dev_private; /**< Per-buffer private storage */ 75 }; 76 77 typedef struct drm_dma_handle { 78 dma_addr_t busaddr; 79 void *vaddr; 80 size_t size; 81 #ifdef __NetBSD__ 82 bus_dma_tag_t dmah_tag; 83 bus_dmamap_t dmah_map; 84 bus_dma_segment_t dmah_seg; 85 #endif 86 } drm_dma_handle_t; 87 88 /** 89 * Buffer entry. There is one of this for each buffer size order. 90 */ 91 struct drm_buf_entry { 92 int buf_size; /**< size */ 93 int buf_count; /**< number of buffers */ 94 struct drm_buf *buflist; /**< buffer list */ 95 int seg_count; 96 int page_order; 97 struct drm_dma_handle **seglist; 98 99 int low_mark; /**< Low water mark */ 100 int high_mark; /**< High water mark */ 101 }; 102 103 /** 104 * DMA data. 105 */ 106 struct drm_device_dma { 107 108 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */ 109 int buf_count; /**< total number of buffers */ 110 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */ 111 int seg_count; 112 int page_count; /**< number of pages */ 113 unsigned long *pagelist; /**< page list */ 114 unsigned long byte_count; 115 enum { 116 _DRM_DMA_USE_AGP = 0x01, 117 _DRM_DMA_USE_SG = 0x02, 118 _DRM_DMA_USE_FB = 0x04, 119 _DRM_DMA_USE_PCI_RO = 0x08 120 } flags; 121 122 }; 123 124 /** 125 * Scatter-gather memory. 126 */ 127 struct drm_sg_mem { 128 unsigned long handle; 129 void *virtual; 130 #ifdef __NetBSD__ 131 size_t sg_size; 132 bus_dma_tag_t sg_tag; 133 bus_dmamap_t sg_map; 134 unsigned int sg_nsegs; 135 unsigned int sg_nsegs_max; 136 bus_dma_segment_t sg_segs[]; 137 #else 138 int pages; 139 struct page **pagelist; 140 dma_addr_t *busaddr; 141 #endif 142 }; 143 144 #ifdef __NetBSD__ 145 /* 146 * XXX Remember: memory mappings only. bm_flags must include 147 * BUS_SPACE_MAP_LINEAR. 148 */ 149 struct drm_bus_map { 150 bus_addr_t bm_base; 151 bus_size_t bm_size; 152 bus_space_handle_t bm_bsh; 153 int bm_flags; 154 }; 155 #endif 156 157 /** 158 * Kernel side of a mapping 159 */ 160 struct drm_local_map { 161 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/ 162 unsigned long size; /**< Requested physical size (bytes) */ 163 enum drm_map_type type; /**< Type of memory to map */ 164 enum drm_map_flags flags; /**< Flags */ 165 void *handle; /**< User-space: "Handle" to pass to mmap() */ 166 /**< Kernel-space: kernel-virtual address */ 167 int mtrr; /**< MTRR slot used */ 168 169 #ifdef __NetBSD__ 170 union { 171 /* _DRM_FRAME_BUFFER, _DRM_AGP, _DRM_REGISTERS */ 172 /* XXX mtrr should be moved into this case too. */ 173 struct { 174 /* 175 * XXX bst seems like a waste of space, but not 176 * all accessors have the drm_device handy. 177 */ 178 bus_space_tag_t bst; 179 bus_space_handle_t bsh; 180 struct drm_bus_map *bus_map; 181 } bus_space; 182 183 /* _DRM_CONSISTENT */ 184 struct drm_dma_handle *dmah; 185 186 /* _DRM_SCATTER_GATHER */ 187 #if 0 /* XXX stored in dev->sg instead */ 188 struct drm_sg_mem *sg; 189 #endif 190 191 /* _DRM_SHM */ 192 /* XXX Anything? uvm object? */ 193 } lm_data; 194 #endif 195 }; 196 197 typedef struct drm_local_map drm_local_map_t; 198 199 /** 200 * Mappings list 201 */ 202 struct drm_map_list { 203 struct list_head head; /**< list head */ 204 struct drm_hash_item hash; 205 struct drm_local_map *map; /**< mapping */ 206 uint64_t user_token; 207 struct drm_master *master; 208 }; 209 210 int drm_legacy_addmap(struct drm_device *d, resource_size_t offset, 211 unsigned int size, enum drm_map_type type, 212 enum drm_map_flags flags, struct drm_local_map **map_p); 213 int drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map); 214 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map); 215 struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev); 216 #ifdef __NetBSD__ 217 int drm_mmap_object(struct drm_device *, off_t, size_t, int, 218 struct uvm_object **, voff_t *, struct file *); 219 paddr_t drm_mmap_paddr(struct drm_device *, off_t, int); 220 #else 221 int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma); 222 #endif 223 224 int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req); 225 int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req); 226 227 /** 228 * Test that the hardware lock is held by the caller, returning otherwise. 229 * 230 * \param dev DRM device. 231 * \param filp file pointer of the caller. 232 */ 233 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \ 234 do { \ 235 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \ 236 _file_priv->master->lock.file_priv != _file_priv) { \ 237 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\ 238 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\ 239 _file_priv->master->lock.file_priv, _file_priv); \ 240 return -EINVAL; \ 241 } \ 242 } while (0) 243 244 void drm_legacy_idlelock_take(struct drm_lock_data *lock); 245 void drm_legacy_idlelock_release(struct drm_lock_data *lock); 246 247 /* drm_pci.c dma alloc wrappers */ 248 void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah); 249 250 /* drm_memory.c */ 251 #ifdef __NetBSD__ 252 int drm_limit_dma_space(struct drm_device *, resource_size_t, resource_size_t); 253 #endif 254 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev); 255 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev); 256 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev); 257 258 static __inline__ struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, 259 unsigned int token) 260 { 261 struct drm_map_list *_entry; 262 list_for_each_entry(_entry, &dev->maplist, head) 263 if (_entry->user_token == token) 264 return _entry->map; 265 return NULL; 266 } 267 268 #endif /* __DRM_DRM_LEGACY_H__ */ 269
Indexes created Sun Oct 19 02:09:48 GMT 2025