drivers/gpu/drm/udl/udl_drv.h

   1 /*
   2  * Copyright (C) 2012 Red Hat
   3  *
   4  * based in parts on udlfb.c:
   5  * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
   6  * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
   7  * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
   8  *
   9  * This file is subject to the terms and conditions of the GNU General Public
  10  * License v2. See the file COPYING in the main directory of this archive for
  11  * more details.
  12  */
  13
  14 #ifndef UDL_DRV_H
  15 #define UDL_DRV_H
  16
  17 #include <linux/usb.h>
  18
  19 #define DRIVER_NAME             "udl"
  20 #define DRIVER_DESC             "DisplayLink"
  21 #define DRIVER_DATE             "20120220"
  22
  23 #define DRIVER_MAJOR            0
  24 #define DRIVER_MINOR            0
  25 #define DRIVER_PATCHLEVEL       1
  26
  27 struct udl_device;
  28
  29 struct urb_node {
  30         struct list_head entry;
  31         struct udl_device *dev;
  32         struct delayed_work release_urb_work;
  33         struct urb *urb;
  34 };
  35
  36 struct urb_list {
  37         struct list_head list;
  38         spinlock_t lock;
  39         struct semaphore limit_sem;
  40         int available;
  41         int count;
  42         size_t size;
  43 };
  44
  45 struct udl_fbdev;
  46
  47 struct udl_device {
  48         struct device *dev;
  49         struct drm_device *ddev;
  50
  51         int sku_pixel_limit;
  52
  53         struct urb_list urbs;
  54         atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
  55
  56         struct udl_fbdev *fbdev;
  57         char mode_buf[1024];
  58         uint32_t mode_buf_len;
  59         atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
  60         atomic_t bytes_identical; /* saved effort with backbuffer comparison */
  61         atomic_t bytes_sent; /* to usb, after compression including overhead */
  62         atomic_t cpu_kcycles_used; /* transpired during pixel processing */
  63 };
  64
  65 struct udl_gem_object {
  66         struct drm_gem_object base;
  67         struct page **pages;
  68         void *vmapping;
  69         struct sg_table *sg;
  70 };
  71
  72 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
  73
  74 struct udl_framebuffer {
  75         struct drm_framebuffer base;
  76         struct udl_gem_object *obj;
  77         bool active_16; /* active on the 16-bit channel */
  78         int x1, y1, x2, y2; /* dirty rect */
  79         spinlock_t dirty_lock;
  80 };
  81
  82 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
  83
  84 /* modeset */
  85 int udl_modeset_init(struct drm_device *dev);
  86 void udl_modeset_cleanup(struct drm_device *dev);
  87 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
  88
  89 struct drm_encoder *udl_encoder_init(struct drm_device *dev);
  90
  91 struct urb *udl_get_urb(struct drm_device *dev);
  92
  93 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
  94 void udl_urb_completion(struct urb *urb);
  95
  96 int udl_driver_load(struct drm_device *dev, unsigned long flags);
  97 int udl_driver_unload(struct drm_device *dev);
  98
  99 int udl_fbdev_init(struct drm_device *dev);
 100 void udl_fbdev_cleanup(struct drm_device *dev);
 101 void udl_fbdev_unplug(struct drm_device *dev);
 102 struct drm_framebuffer *
 103 udl_fb_user_fb_create(struct drm_device *dev,
 104                       struct drm_file *file,
 105                       struct drm_mode_fb_cmd2 *mode_cmd);
 106
 107 int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
 108                      const char *front, char **urb_buf_ptr,
 109                      u32 byte_offset, u32 device_byte_offset, u32 byte_width,
 110                      int *ident_ptr, int *sent_ptr);
 111
 112 int udl_dumb_create(struct drm_file *file_priv,
 113                     struct drm_device *dev,
 114                     struct drm_mode_create_dumb *args);
 115 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
 116                  uint32_t handle, uint64_t *offset);
 117
 118 int udl_gem_init_object(struct drm_gem_object *obj);
 119 void udl_gem_free_object(struct drm_gem_object *gem_obj);
 120 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
 121                                             size_t size);
 122 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 123                                 struct dma_buf *dma_buf);
 124
 125 int udl_gem_vmap(struct udl_gem_object *obj);
 126 void udl_gem_vunmap(struct udl_gem_object *obj);
 127 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
 128 int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
 129
 130 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
 131                       int width, int height);
 132
 133 int udl_drop_usb(struct drm_device *dev);
 134
 135 #define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
 136 #define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
 137 #define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
 138 #define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
 139
 140 #define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
 141 #define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
 142 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
 143 #define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
 144
 145 #endif