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