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