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 #include <linux/mm_types.h>
  20
  21 #define DRIVER_NAME             "udl"
  22 #define DRIVER_DESC             "DisplayLink"
  23 #define DRIVER_DATE             "20120220"
  24
  25 #define DRIVER_MAJOR            0
  26 #define DRIVER_MINOR            0
  27 #define DRIVER_PATCHLEVEL       1
  28
  29 #define UDL_BO_CACHEABLE                (1 << 0)
  30 #define UDL_BO_WC               (1 << 1)
  31
  32 struct udl_device;
  33
  34 struct urb_node {
  35         struct list_head entry;
  36         struct udl_device *dev;
  37         struct delayed_work release_urb_work;
  38         struct urb *urb;
  39 };
  40
  41 struct urb_list {
  42         struct list_head list;
  43         spinlock_t lock;
  44         struct semaphore limit_sem;
  45         int available;
  46         int count;
  47         size_t size;
  48 };
  49
  50 struct udl_fbdev;
  51
  52 struct udl_device {
  53         struct device *dev;
  54         struct drm_device *ddev;
  55         struct usb_device *udev;
  56         struct drm_crtc *crtc;
  57
  58         struct mutex gem_lock;
  59
  60         int sku_pixel_limit;
  61
  62         struct urb_list urbs;
  63         atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
  64
  65         struct udl_fbdev *fbdev;
  66         char mode_buf[1024];
  67         uint32_t mode_buf_len;
  68         atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
  69         atomic_t bytes_identical; /* saved effort with backbuffer comparison */
  70         atomic_t bytes_sent; /* to usb, after compression including overhead */
  71         atomic_t cpu_kcycles_used; /* transpired during pixel processing */
  72 };
  73
  74 struct udl_gem_object {
  75         struct drm_gem_object base;
  76         struct page **pages;
  77         void *vmapping;
  78         struct sg_table *sg;
  79         unsigned int flags;
  80 };
  81
  82 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
  83
  84 struct udl_framebuffer {
  85         struct drm_framebuffer base;
  86         struct udl_gem_object *obj;
  87         bool active_16; /* active on the 16-bit channel */
  88 };
  89
  90 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
  91
  92 /* modeset */
  93 int udl_modeset_init(struct drm_device *dev);
  94 void udl_modeset_restore(struct drm_device *dev);
  95 void udl_modeset_cleanup(struct drm_device *dev);
  96 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
  97
  98 struct drm_encoder *udl_encoder_init(struct drm_device *dev);
  99
 100 struct urb *udl_get_urb(struct drm_device *dev);
 101
 102 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
 103 void udl_urb_completion(struct urb *urb);
 104
 105 int udl_driver_load(struct drm_device *dev, unsigned long flags);
 106 void udl_driver_unload(struct drm_device *dev);
 107 void udl_driver_release(struct drm_device *dev);
 108
 109 int udl_fbdev_init(struct drm_device *dev);
 110 void udl_fbdev_cleanup(struct drm_device *dev);
 111 void udl_fbdev_unplug(struct drm_device *dev);
 112 struct drm_framebuffer *
 113 udl_fb_user_fb_create(struct drm_device *dev,
 114                       struct drm_file *file,
 115                       const struct drm_mode_fb_cmd2 *mode_cmd);
 116
 117 int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
 118                      const char *front, char **urb_buf_ptr,
 119                      u32 byte_offset, u32 device_byte_offset, u32 byte_width,
 120                      int *ident_ptr, int *sent_ptr);
 121
 122 int udl_dumb_create(struct drm_file *file_priv,
 123                     struct drm_device *dev,
 124                     struct drm_mode_create_dumb *args);
 125 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
 126                  uint32_t handle, uint64_t *offset);
 127
 128 void udl_gem_free_object(struct drm_gem_object *gem_obj);
 129 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
 130                                             size_t size);
 131 struct dma_buf *udl_gem_prime_export(struct drm_device *dev,
 132                                      struct drm_gem_object *obj, int flags);
 133 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 134                                 struct dma_buf *dma_buf);
 135
 136 int udl_gem_get_pages(struct udl_gem_object *obj);
 137 void udl_gem_put_pages(struct udl_gem_object *obj);
 138 int udl_gem_vmap(struct udl_gem_object *obj);
 139 void udl_gem_vunmap(struct udl_gem_object *obj);
 140 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
 141 vm_fault_t udl_gem_fault(struct vm_fault *vmf);
 142
 143 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
 144                       int width, int height);
 145
 146 int udl_drop_usb(struct drm_device *dev);
 147
 148 #define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
 149 #define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
 150 #define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
 151 #define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
 152
 153 #define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
 154 #define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
 155 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
 156 #define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
 157
 158 #endif