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 file; 42 43 /* 44 * Legacy Support for palateontologic DRM drivers 45 * 46 * If you add a new driver and it uses any of these functions or structures, 47 * you're doing it terribly wrong. 48 */ 49 50 /** 51 * DMA buffer. 52 */ 53 struct drm_buf { 54 int idx; /**< Index into master buflist */ 55 int total; /**< Buffer size */ 56 int order; /**< log-base-2(total) */ 57 int used; /**< Amount of buffer in use (for DMA) */ 58 unsigned long offset; /**< Byte offset (used internally) */ 59 void *address; /**< Address of buffer */ 60 unsigned long bus_address; /**< Bus address of buffer */ 61 struct drm_buf *next; /**< Kernel-only: used for free list */ 62 __volatile__ int waiting; /**< On kernel DMA queue */ 63 __volatile__ int pending; /**< On hardware DMA queue */ 64 struct drm_file *file_priv; /**< Private of holding file descr */ 65 int context; /**< Kernel queue for this buffer */ 66 int while_locked; /**< Dispatch this buffer while locked */ 67 enum { 68 DRM_LIST_NONE = 0, 69 DRM_LIST_FREE = 1, 70 DRM_LIST_WAIT = 2, 71 DRM_LIST_PEND = 3, 72 DRM_LIST_PRIO = 4, 73 DRM_LIST_RECLAIM = 5 74 } list; /**< Which list we're on */ 75 76 int dev_priv_size; /**< Size of buffer private storage */ 77 void *dev_private; /**< Per-buffer private storage */ 78 }; 79 80 typedef struct drm_dma_handle { 81 dma_addr_t busaddr; 82 void *vaddr; 83 size_t size; 84 } drm_dma_handle_t; 85 86 /** 87 * Buffer entry. There is one of this for each buffer size order. 88 */ 89 struct drm_buf_entry { 90 int buf_size; /**< size */ 91 int buf_count; /**< number of buffers */ 92 struct drm_buf *buflist; /**< buffer list */ 93 int seg_count; 94 int page_order; 95 struct drm_dma_handle **seglist; 96 97 int low_mark; /**< Low water mark */ 98 int high_mark; /**< High water mark */ 99 }; 100 101 /** 102 * DMA data. 103 */ 104 struct drm_device_dma { 105 106 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */ 107 int buf_count; /**< total number of buffers */ 108 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */ 109 int seg_count; 110 int page_count; /**< number of pages */ 111 unsigned long *pagelist; /**< page list */ 112 unsigned long byte_count; 113 enum { 114 _DRM_DMA_USE_AGP = 0x01, 115 _DRM_DMA_USE_SG = 0x02, 116 _DRM_DMA_USE_FB = 0x04, 117 _DRM_DMA_USE_PCI_RO = 0x08 118 } flags; 119 120 }; 121 122 /** 123 * Scatter-gather memory. 124 */ 125 struct drm_sg_mem { 126 unsigned long handle; 127 void *virtual; 128 int pages; 129 struct page **pagelist; 130 dma_addr_t *busaddr; 131 }; 132 133 /** 134 * Kernel side of a mapping 135 */ 136 struct drm_local_map { 137 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/ 138 unsigned long size; /**< Requested physical size (bytes) */ 139 enum drm_map_type type; /**< Type of memory to map */ 140 enum drm_map_flags flags; /**< Flags */ 141 void *handle; /**< User-space: "Handle" to pass to mmap() */ 142 /**< Kernel-space: kernel-virtual address */ 143 int mtrr; /**< MTRR slot used */ 144 }; 145 146 typedef struct drm_local_map drm_local_map_t; 147 148 /** 149 * Mappings list 150 */ 151 struct drm_map_list { 152 struct list_head head; /**< list head */ 153 struct drm_hash_item hash; 154 struct drm_local_map *map; /**< mapping */ 155 uint64_t user_token; 156 struct drm_master *master; 157 }; 158 159 int drm_legacy_addmap(struct drm_device *d, resource_size_t offset, 160 unsigned int size, enum drm_map_type type, 161 enum drm_map_flags flags, struct drm_local_map **map_p); 162 struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, unsigned int token); 163 void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map); 164 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map); 165 struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev); 166 int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma); 167 168 int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req); 169 int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req); 170 171 /** 172 * Test that the hardware lock is held by the caller, returning otherwise. 173 * 174 * \param dev DRM device. 175 * \param filp file pointer of the caller. 176 */ 177 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \ 178 do { \ 179 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \ 180 _file_priv->master->lock.file_priv != _file_priv) { \ 181 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\ 182 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\ 183 _file_priv->master->lock.file_priv, _file_priv); \ 184 return -EINVAL; \ 185 } \ 186 } while (0) 187 188 void drm_legacy_idlelock_take(struct drm_lock_data *lock); 189 void drm_legacy_idlelock_release(struct drm_lock_data *lock); 190 191 /* drm_pci.c dma alloc wrappers */ 192 void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah); 193 194 /* drm_memory.c */ 195 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev); 196 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev); 197 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev); 198 199 #endif /* __DRM_DRM_LEGACY_H__ */ 200