drm_legacy.h revision 1.1.1.2
1 /* $NetBSD: drm_legacy.h,v 1.1.1.2 2021/12/18 20:15:57 riastradh Exp $ */ 2 3 #ifndef __DRM_DRM_LEGACY_H__ 4 #define __DRM_DRM_LEGACY_H__ 5 /* 6 * Legacy driver interfaces for the Direct Rendering Manager 7 * 8 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 9 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 10 * Copyright (c) 2009-2010, Code Aurora Forum. 11 * All rights reserved. 12 * Copyright 2014 Intel Corporation 13 * Daniel Vetter <daniel.vetter (at) ffwll.ch> 14 * 15 * Author: Rickard E. (Rik) Faith <faith (at) valinux.com> 16 * Author: Gareth Hughes <gareth (at) valinux.com> 17 * 18 * Permission is hereby granted, free of charge, to any person obtaining a 19 * copy of this software and associated documentation files (the "Software"), 20 * to deal in the Software without restriction, including without limitation 21 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 22 * and/or sell copies of the Software, and to permit persons to whom the 23 * Software is furnished to do so, subject to the following conditions: 24 * 25 * The above copyright notice and this permission notice (including the next 26 * paragraph) shall be included in all copies or substantial portions of the 27 * Software. 28 * 29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 30 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 31 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 32 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 33 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 34 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 35 * OTHER DEALINGS IN THE SOFTWARE. 36 */ 37 38 #include <drm/drm.h> 39 #include <drm/drm_auth.h> 40 #include <drm/drm_hashtab.h> 41 42 struct drm_device; 43 struct drm_driver; 44 struct file; 45 struct pci_driver; 46 47 /* 48 * Legacy Support for palateontologic DRM drivers 49 * 50 * If you add a new driver and it uses any of these functions or structures, 51 * you're doing it terribly wrong. 52 */ 53 54 /** 55 * DMA buffer. 56 */ 57 struct drm_buf { 58 int idx; /**< Index into master buflist */ 59 int total; /**< Buffer size */ 60 int order; /**< log-base-2(total) */ 61 int used; /**< Amount of buffer in use (for DMA) */ 62 unsigned long offset; /**< Byte offset (used internally) */ 63 void *address; /**< Address of buffer */ 64 unsigned long bus_address; /**< Bus address of buffer */ 65 struct drm_buf *next; /**< Kernel-only: used for free list */ 66 __volatile__ int waiting; /**< On kernel DMA queue */ 67 __volatile__ int pending; /**< On hardware DMA queue */ 68 struct drm_file *file_priv; /**< Private of holding file descr */ 69 int context; /**< Kernel queue for this buffer */ 70 int while_locked; /**< Dispatch this buffer while locked */ 71 enum { 72 DRM_LIST_NONE = 0, 73 DRM_LIST_FREE = 1, 74 DRM_LIST_WAIT = 2, 75 DRM_LIST_PEND = 3, 76 DRM_LIST_PRIO = 4, 77 DRM_LIST_RECLAIM = 5 78 } list; /**< Which list we're on */ 79 80 int dev_priv_size; /**< Size of buffer private storage */ 81 void *dev_private; /**< Per-buffer private storage */ 82 }; 83 84 typedef struct drm_dma_handle { 85 dma_addr_t busaddr; 86 void *vaddr; 87 size_t size; 88 } drm_dma_handle_t; 89 90 /** 91 * Buffer entry. There is one of this for each buffer size order. 92 */ 93 struct drm_buf_entry { 94 int buf_size; /**< size */ 95 int buf_count; /**< number of buffers */ 96 struct drm_buf *buflist; /**< buffer list */ 97 int seg_count; 98 int page_order; 99 struct drm_dma_handle **seglist; 100 101 int low_mark; /**< Low water mark */ 102 int high_mark; /**< High water mark */ 103 }; 104 105 /** 106 * DMA data. 107 */ 108 struct drm_device_dma { 109 110 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */ 111 int buf_count; /**< total number of buffers */ 112 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */ 113 int seg_count; 114 int page_count; /**< number of pages */ 115 unsigned long *pagelist; /**< page list */ 116 unsigned long byte_count; 117 enum { 118 _DRM_DMA_USE_AGP = 0x01, 119 _DRM_DMA_USE_SG = 0x02, 120 _DRM_DMA_USE_FB = 0x04, 121 _DRM_DMA_USE_PCI_RO = 0x08 122 } flags; 123 124 }; 125 126 /** 127 * Scatter-gather memory. 128 */ 129 struct drm_sg_mem { 130 unsigned long handle; 131 void *virtual; 132 int pages; 133 struct page **pagelist; 134 dma_addr_t *busaddr; 135 }; 136 137 /** 138 * Kernel side of a mapping 139 */ 140 struct drm_local_map { 141 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/ 142 unsigned long size; /**< Requested physical size (bytes) */ 143 enum drm_map_type type; /**< Type of memory to map */ 144 enum drm_map_flags flags; /**< Flags */ 145 void *handle; /**< User-space: "Handle" to pass to mmap() */ 146 /**< Kernel-space: kernel-virtual address */ 147 int mtrr; /**< MTRR slot used */ 148 }; 149 150 typedef struct drm_local_map drm_local_map_t; 151 152 /** 153 * Mappings list 154 */ 155 struct drm_map_list { 156 struct list_head head; /**< list head */ 157 struct drm_hash_item hash; 158 struct drm_local_map *map; /**< mapping */ 159 uint64_t user_token; 160 struct drm_master *master; 161 }; 162 163 int drm_legacy_addmap(struct drm_device *d, resource_size_t offset, 164 unsigned int size, enum drm_map_type type, 165 enum drm_map_flags flags, struct drm_local_map **map_p); 166 struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, unsigned int token); 167 void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map); 168 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map); 169 struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev); 170 int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma); 171 172 int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req); 173 int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req); 174 175 /** 176 * Test that the hardware lock is held by the caller, returning otherwise. 177 * 178 * \param dev DRM device. 179 * \param filp file pointer of the caller. 180 */ 181 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \ 182 do { \ 183 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \ 184 _file_priv->master->lock.file_priv != _file_priv) { \ 185 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\ 186 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\ 187 _file_priv->master->lock.file_priv, _file_priv); \ 188 return -EINVAL; \ 189 } \ 190 } while (0) 191 192 void drm_legacy_idlelock_take(struct drm_lock_data *lock); 193 void drm_legacy_idlelock_release(struct drm_lock_data *lock); 194 195 /* drm_pci.c */ 196 197 #ifdef CONFIG_PCI 198 199 void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah); 200 int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver); 201 void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver); 202 203 #else 204 205 static inline void __drm_legacy_pci_free(struct drm_device *dev, 206 drm_dma_handle_t *dmah) 207 { 208 } 209 210 static inline int drm_legacy_pci_init(struct drm_driver *driver, 211 struct pci_driver *pdriver) 212 { 213 return -EINVAL; 214 } 215 216 static inline void drm_legacy_pci_exit(struct drm_driver *driver, 217 struct pci_driver *pdriver) 218 { 219 } 220 221 #endif 222 223 /* drm_memory.c */ 224 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev); 225 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev); 226 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev); 227 228 #endif /* __DRM_DRM_LEGACY_H__ */ 229
Indexes created Thu Oct 23 22:10:10 GMT 2025