1 #ifndef __DRM_DRM_LEGACY_H__ 2 #define __DRM_DRM_LEGACY_H__ 3 4 /* 5 * Legacy driver interfaces for the Direct Rendering Manager 6 * 7 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 8 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 9 * Copyright (c) 2009-2010, Code Aurora Forum. 10 * All rights reserved. 11 * Copyright © 2014 Intel Corporation 12 * Daniel Vetter <daniel.vetter@ffwll.ch> 13 * 14 * Author: Rickard E. (Rik) Faith <faith@valinux.com> 15 * Author: Gareth Hughes <gareth@valinux.com> 16 * 17 * Permission is hereby granted, free of charge, to any person obtaining a 18 * copy of this software and associated documentation files (the "Software"), 19 * to deal in the Software without restriction, including without limitation 20 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 21 * and/or sell copies of the Software, and to permit persons to whom the 22 * Software is furnished to do so, subject to the following conditions: 23 * 24 * The above copyright notice and this permission notice (including the next 25 * paragraph) shall be included in all copies or substantial portions of the 26 * Software. 27 * 28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 29 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 30 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 31 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 32 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 33 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 34 * OTHER DEALINGS IN THE SOFTWARE. 35 */ 36 37 38 /* 39 * Legacy Support for palateontologic DRM drivers 40 * 41 * If you add a new driver and it uses any of these functions or structures, 42 * you're doing it terribly wrong. 43 */ 44 45 /** 46 * DMA buffer. 47 */ 48 struct drm_buf { 49 int idx; /**< Index into master buflist */ 50 int total; /**< Buffer size */ 51 int order; /**< log-base-2(total) */ 52 int used; /**< Amount of buffer in use (for DMA) */ 53 unsigned long offset; /**< Byte offset (used internally) */ 54 void *address; /**< Address of buffer */ 55 unsigned long bus_address; /**< Bus address of buffer */ 56 struct drm_buf *next; /**< Kernel-only: used for free list */ 57 __volatile__ int waiting; /**< On kernel DMA queue */ 58 __volatile__ int pending; /**< On hardware DMA queue */ 59 struct drm_file *file_priv; /**< Private of holding file descr */ 60 int context; /**< Kernel queue for this buffer */ 61 int while_locked; /**< Dispatch this buffer while locked */ 62 enum { 63 DRM_LIST_NONE = 0, 64 DRM_LIST_FREE = 1, 65 DRM_LIST_WAIT = 2, 66 DRM_LIST_PEND = 3, 67 DRM_LIST_PRIO = 4, 68 DRM_LIST_RECLAIM = 5 69 } list; /**< Which list we're on */ 70 71 int dev_priv_size; /**< Size of buffer private storage */ 72 void *dev_private; /**< Per-buffer private storage */ 73 }; 74 75 typedef struct drm_dma_handle { 76 void *vaddr; 77 size_t size; 78 bus_addr_t busaddr; 79 bus_dma_tag_t tag; 80 bus_dmamap_t map; 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 vm_offset_t vaddr; 124 vm_paddr_t *busaddr; 125 vm_pindex_t pages; 126 }; 127 128 /** 129 * Kernel side of a mapping 130 */ 131 struct drm_local_map { 132 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/ 133 unsigned long size; /**< Requested physical size (bytes) */ 134 enum drm_map_type type; /**< Type of memory to map */ 135 enum drm_map_flags flags; /**< Flags */ 136 void *handle; /**< User-space: "Handle" to pass to mmap() */ 137 /**< Kernel-space: kernel-virtual address */ 138 int mtrr; /**< MTRR slot used */ 139 }; 140 141 typedef struct drm_local_map drm_local_map_t; 142 143 /** 144 * Mappings list 145 */ 146 struct drm_map_list { 147 struct list_head head; /**< list head */ 148 struct drm_hash_item hash; 149 struct drm_local_map *map; /**< mapping */ 150 uint64_t user_token; 151 struct drm_master *master; 152 }; 153 154 int drm_legacy_addmap(struct drm_device *d, resource_size_t offset, 155 unsigned int size, enum drm_map_type type, 156 enum drm_map_flags flags, struct drm_local_map **map_p); 157 int drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map); 158 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map); 159 struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev); 160 161 int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req); 162 int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req); 163 164 /** 165 * Test that the hardware lock is held by the caller, returning otherwise. 166 * 167 * \param dev DRM device. 168 * \param filp file pointer of the caller. 169 */ 170 #define LOCK_TEST_WITH_RETURN(dev, file_priv) \ 171 do { \ 172 if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) || \ 173 dev->lock.file_priv != file_priv) { \ 174 DRM_ERROR("%s called without lock held\n", \ 175 __FUNCTION__); \ 176 return EINVAL; \ 177 } \ 178 } while (0) 179 180 void drm_legacy_idlelock_take(struct drm_lock_data *lock); 181 void drm_legacy_idlelock_release(struct drm_lock_data *lock); 182 183 /* drm_pci.c dma alloc wrappers */ 184 void __drm_legacy_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah); 185 186 /* drm_memory.c */ 187 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev); 188 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev); 189 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev); 190 191 #endif /* __DRM_DRM_LEGACY_H__ */ 192