sys/dev/drm/include/drm/drm_legacy.h

   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 void 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__ */