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udl_drv.h
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1 /*
2  * Copyright (C) 2012 Red Hat
3  *
4  * based in parts on udlfb.c:
5  * Copyright (C) 2009 Roberto De Ioris <[email protected]>
6  * Copyright (C) 2009 Jaya Kumar <[email protected]>
7  * Copyright (C) 2009 Bernie Thompson <[email protected]>
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 };
79 
80 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
81 
82 /* modeset */
83 int udl_modeset_init(struct drm_device *dev);
84 void udl_modeset_cleanup(struct drm_device *dev);
85 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
86 
87 struct drm_encoder *udl_encoder_init(struct drm_device *dev);
88 
89 struct urb *udl_get_urb(struct drm_device *dev);
90 
91 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
92 void udl_urb_completion(struct urb *urb);
93 
94 int udl_driver_load(struct drm_device *dev, unsigned long flags);
95 int udl_driver_unload(struct drm_device *dev);
96 
97 int udl_fbdev_init(struct drm_device *dev);
98 void udl_fbdev_cleanup(struct drm_device *dev);
99 void udl_fbdev_unplug(struct drm_device *dev);
100 struct drm_framebuffer *
101 udl_fb_user_fb_create(struct drm_device *dev,
102  struct drm_file *file,
103  struct drm_mode_fb_cmd2 *mode_cmd);
104 
105 int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
106  const char *front, char **urb_buf_ptr,
107  u32 byte_offset, u32 device_byte_offset, u32 byte_width,
108  int *ident_ptr, int *sent_ptr);
109 
110 int udl_dumb_create(struct drm_file *file_priv,
111  struct drm_device *dev,
112  struct drm_mode_create_dumb *args);
113 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
114  uint32_t handle, uint64_t *offset);
115 int udl_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev,
116  uint32_t handle);
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"
136 #define CMD_WRITE_RL8 "\xAF\x61"
137 #define CMD_WRITE_COPY8 "\xAF\x62"
138 #define CMD_WRITE_RLX8 "\xAF\x63"
140 #define CMD_WRITE_RAW16 "\xAF\x68"
141 #define CMD_WRITE_RL16 "\xAF\x69"
142 #define CMD_WRITE_COPY16 "\xAF\x6A"
143 #define CMD_WRITE_RLX16 "\xAF\x6B"
145 #endif
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