1 #ifndef __DRM_DRM_LEGACY_H__ 2 #define __DRM_DRM_LEGACY_H__ 3 /* 4 * Legacy driver interfaces for the Direct Rendering Manager 5 * 6 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 7 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 8 * Copyright (c) 2009-2010, Code Aurora Forum. 9 * All rights reserved. 10 * Copyright © 2014 Intel Corporation 11 * Daniel Vetter <daniel.vetter@ffwll.ch> 12 * 13 * Author: Rickard E. (Rik) Faith <faith@valinux.com> 14 * Author: Gareth Hughes <gareth@valinux.com> 15 * 16 * Permission is hereby granted, free of charge, to any person obtaining a 17 * copy of this software and associated documentation files (the "Software"), 18 * to deal in the Software without restriction, including without limitation 19 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 20 * and/or sell copies of the Software, and to permit persons to whom the 21 * Software is furnished to do so, subject to the following conditions: 22 * 23 * The above copyright notice and this permission notice (including the next 24 * paragraph) shall be included in all copies or substantial portions of the 25 * Software. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 33 * OTHER DEALINGS IN THE SOFTWARE. 34 */ 35 36 #include <drm/drm.h> 37 #include <drm/drm_auth.h> 38 #include <drm/drm_hashtab.h> 39 40 struct drm_device; 41 struct drm_driver; 42 struct file; 43 struct pci_driver; 44 45 /* 46 * Legacy Support for palateontologic DRM drivers 47 * 48 * If you add a new driver and it uses any of these functions or structures, 49 * you're doing it terribly wrong. 50 */ 51 52 /** 53 * DMA buffer. 54 */ 55 struct drm_buf { 56 int idx; /**< Index into master buflist */ 57 int total; /**< Buffer size */ 58 int order; /**< log-base-2(total) */ 59 int used; /**< Amount of buffer in use (for DMA) */ 60 unsigned long offset; /**< Byte offset (used internally) */ 61 void *address; /**< Address of buffer */ 62 unsigned long bus_address; /**< Bus address of buffer */ 63 struct drm_buf *next; /**< Kernel-only: used for free list */ 64 __volatile__ int waiting; /**< On kernel DMA queue */ 65 __volatile__ int pending; /**< On hardware DMA queue */ 66 struct drm_file *file_priv; /**< Private of holding file descr */ 67 int context; /**< Kernel queue for this buffer */ 68 int while_locked; /**< Dispatch this buffer while locked */ 69 enum { 70 DRM_LIST_NONE = 0, 71 DRM_LIST_FREE = 1, 72 DRM_LIST_WAIT = 2, 73 DRM_LIST_PEND = 3, 74 DRM_LIST_PRIO = 4, 75 DRM_LIST_RECLAIM = 5 76 } list; /**< Which list we're on */ 77 78 int dev_priv_size; /**< Size of buffer private storage */ 79 void *dev_private; /**< Per-buffer private storage */ 80 }; 81 82 typedef struct drm_dma_handle { 83 dma_addr_t busaddr; 84 void *vaddr; 85 size_t size; 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 int pages; 131 struct page **pagelist; 132 dma_addr_t *busaddr; 133 }; 134 135 /** 136 * Kernel side of a mapping 137 */ 138 struct drm_local_map { 139 dma_addr_t offset; /**< Requested physical address (0 for SAREA)*/ 140 unsigned long size; /**< Requested physical size (bytes) */ 141 enum drm_map_type type; /**< Type of memory to map */ 142 enum drm_map_flags flags; /**< Flags */ 143 void *handle; /**< User-space: "Handle" to pass to mmap() */ 144 /**< Kernel-space: kernel-virtual address */ 145 int mtrr; /**< MTRR slot used */ 146 }; 147 148 typedef struct drm_local_map drm_local_map_t; 149 150 /** 151 * Mappings list 152 */ 153 struct drm_map_list { 154 struct list_head head; /**< list head */ 155 struct drm_hash_item hash; 156 struct drm_local_map *map; /**< mapping */ 157 uint64_t user_token; 158 struct drm_master *master; 159 }; 160 161 int drm_legacy_addmap(struct drm_device *d, resource_size_t offset, 162 unsigned int size, enum drm_map_type type, 163 enum drm_map_flags flags, struct drm_local_map **map_p); 164 struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, unsigned int token); 165 void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map); 166 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map); 167 struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev); 168 int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma); 169 170 int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req); 171 int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req); 172 173 /** 174 * Test that the hardware lock is held by the caller, returning otherwise. 175 * 176 * \param dev DRM device. 177 * \param filp file pointer of the caller. 178 */ 179 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \ 180 do { \ 181 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \ 182 _file_priv->master->lock.file_priv != _file_priv) { \ 183 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\ 184 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\ 185 _file_priv->master->lock.file_priv, _file_priv); \ 186 return -EINVAL; \ 187 } \ 188 } while (0) 189 190 void drm_legacy_idlelock_take(struct drm_lock_data *lock); 191 void drm_legacy_idlelock_release(struct drm_lock_data *lock); 192 193 /* drm_pci.c */ 194 195 #ifdef CONFIG_PCI 196 197 struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size, 198 size_t align); 199 void drm_pci_free(struct drm_device *dev, struct drm_dma_handle *dmah); 200 201 int drm_legacy_pci_init(const struct drm_driver *driver, 202 struct pci_driver *pdriver); 203 void drm_legacy_pci_exit(const struct drm_driver *driver, 204 struct pci_driver *pdriver); 205 206 #else 207 208 static inline struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, 209 size_t size, size_t align) 210 { 211 return NULL; 212 } 213 214 static inline void drm_pci_free(struct drm_device *dev, 215 struct drm_dma_handle *dmah) 216 { 217 } 218 219 static inline int drm_legacy_pci_init(const struct drm_driver *driver, 220 struct pci_driver *pdriver) 221 { 222 return -EINVAL; 223 } 224 225 static inline void drm_legacy_pci_exit(const struct drm_driver *driver, 226 struct pci_driver *pdriver) 227 { 228 } 229 230 #endif 231 232 /* drm_memory.c */ 233 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev); 234 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev); 235 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev); 236 237 #endif /* __DRM_DRM_LEGACY_H__ */ 238