include/drm/drm_legacy.h

   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(struct drm_driver *driver, struct pci_driver *pdriver);
 202 void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
 203
 204 #else
 205
 206 static inline struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev,
 207                                                    size_t size, size_t align)
 208 {
 209         return NULL;
 210 }
 211
 212 static inline void drm_pci_free(struct drm_device *dev,
 213                                 struct drm_dma_handle *dmah)
 214 {
 215 }
 216
 217 static inline int drm_legacy_pci_init(struct drm_driver *driver,
 218                                       struct pci_driver *pdriver)
 219 {
 220         return -EINVAL;
 221 }
 222
 223 static inline void drm_legacy_pci_exit(struct drm_driver *driver,
 224                                        struct pci_driver *pdriver)
 225 {
 226 }
 227
 228 #endif
 229
 230 /* drm_memory.c */
 231 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev);
 232 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
 233 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
 234
 235 #endif /* __DRM_DRM_LEGACY_H__ */