drm_legacy.h revision 1.1
1 /* $NetBSD: drm_legacy.h,v 1.1 2018/08/27 01:35:00 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 } drm_dma_handle_t; 82 83 /** 84 * Buffer entry. There is one of this for each buffer size order. 85 */ 86 struct drm_buf_entry { 87 int buf_size; /**< size */ 88 int buf_count; /**< number of buffers */ 89 struct drm_buf *buflist; /**< buffer list */ 90 int seg_count; 91 int page_order; 92 struct drm_dma_handle **seglist; 93 94 int low_mark; /**< Low water mark */ 95 int high_mark; /**< High water mark */ 96 }; 97 98 /** 99 * DMA data. 100 */ 101 struct drm_device_dma { 102 103 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */ 104 int buf_count; /**< total number of buffers */ 105 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */ 106 int seg_count; 107 int page_count; /**< number of pages */ 108 unsigned long *pagelist; /**< page list */ 109 unsigned long byte_count; 110 enum { 111 _DRM_DMA_USE_AGP = 0x01, 112 _DRM_DMA_USE_SG = 0x02, 113 _DRM_DMA_USE_FB = 0x04, 114 _DRM_DMA_USE_PCI_RO = 0x08 115 } flags; 116 117 }; 118 119 /** 120 * Scatter-gather memory. 121 */ 122 struct drm_sg_mem { 123 unsigned long handle; 124 void *virtual; 125 int pages; 126 struct page **pagelist; 127 dma_addr_t *busaddr; 128 }; 129 130 /** 131 * Kernel side of a mapping 132 */ 133 struct drm_local_map { 134 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/ 135 unsigned long size; /**< Requested physical size (bytes) */ 136 enum drm_map_type type; /**< Type of memory to map */ 137 enum drm_map_flags flags; /**< Flags */ 138 void *handle; /**< User-space: "Handle" to pass to mmap() */ 139 /**< Kernel-space: kernel-virtual address */ 140 int mtrr; /**< MTRR slot used */ 141 }; 142 143 typedef struct drm_local_map drm_local_map_t; 144 145 /** 146 * Mappings list 147 */ 148 struct drm_map_list { 149 struct list_head head; /**< list head */ 150 struct drm_hash_item hash; 151 struct drm_local_map *map; /**< mapping */ 152 uint64_t user_token; 153 struct drm_master *master; 154 }; 155 156 int drm_legacy_addmap(struct drm_device *d, resource_size_t offset, 157 unsigned int size, enum drm_map_type type, 158 enum drm_map_flags flags, struct drm_local_map **map_p); 159 int drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map); 160 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map); 161 struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev); 162 int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma); 163 164 int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req); 165 int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req); 166 167 /** 168 * Test that the hardware lock is held by the caller, returning otherwise. 169 * 170 * \param dev DRM device. 171 * \param filp file pointer of the caller. 172 */ 173 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \ 174 do { \ 175 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \ 176 _file_priv->master->lock.file_priv != _file_priv) { \ 177 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\ 178 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\ 179 _file_priv->master->lock.file_priv, _file_priv); \ 180 return -EINVAL; \ 181 } \ 182 } while (0) 183 184 void drm_legacy_idlelock_take(struct drm_lock_data *lock); 185 void drm_legacy_idlelock_release(struct drm_lock_data *lock); 186 187 /* drm_pci.c dma alloc wrappers */ 188 void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah); 189 190 /* drm_memory.c */ 191 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev); 192 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev); 193 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev); 194 195 static __inline__ struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, 196 unsigned int token) 197 { 198 struct drm_map_list *_entry; 199 list_for_each_entry(_entry, &dev->maplist, head) 200 if (_entry->user_token == token) 201 return _entry->map; 202 return NULL; 203 } 204 205 #endif /* __DRM_DRM_LEGACY_H__ */ 206
Indexes created Sat Oct 18 17:09:52 GMT 2025