Linux Kernel  3.7.1
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udlfb.h
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1 #ifndef UDLFB_H
2 #define UDLFB_H
3 
4 /*
5  * TODO: Propose standard fb.h ioctl for reporting damage,
6  * using _IOWR() and one of the existing area structs from fb.h
7  * Consider these ioctls deprecated, but they're still used by the
8  * DisplayLink X server as yet - need both to be modified in tandem
9  * when new ioctl(s) are ready.
10  */
11 #define DLFB_IOCTL_RETURN_EDID 0xAD
12 #define DLFB_IOCTL_REPORT_DAMAGE 0xAA
13 struct dloarea {
14  int x, y;
15  int w, h;
16  int x2, y2;
17 };
18 
19 struct urb_node {
20  struct list_head entry;
21  struct dlfb_data *dev;
23  struct urb *urb;
24 };
25 
26 struct urb_list {
27  struct list_head list;
29  struct semaphore limit_sem;
30  int available;
31  int count;
32  size_t size;
33 };
34 
35 struct dlfb_data {
36  struct usb_device *udev;
37  struct device *gdev; /* &udev->dev */
38  struct fb_info *info;
39  struct urb_list urbs;
40  struct kref kref;
42  int fb_count;
43  bool virtualized; /* true when physical usb device not present */
46  atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
47  atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
48  char *edid; /* null until we read edid from hw or get from sysfs */
49  size_t edid_size;
51  int base16;
52  int base8;
54  int blank_mode; /*one of FB_BLANK_ */
55  /* blit-only rendering path metrics, exposed through sysfs */
56  atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
57  atomic_t bytes_identical; /* saved effort with backbuffer comparison */
58  atomic_t bytes_sent; /* to usb, after compression including overhead */
59  atomic_t cpu_kcycles_used; /* transpired during pixel processing */
60 };
61 
62 #define NR_USB_REQUEST_I2C_SUB_IO 0x02
63 #define NR_USB_REQUEST_CHANNEL 0x12
64 
65 /* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
66 #define BULK_SIZE 512
67 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
68 #define WRITES_IN_FLIGHT (4)
69 
70 #define MAX_VENDOR_DESCRIPTOR_SIZE 256
71 
72 #define GET_URB_TIMEOUT HZ
73 #define FREE_URB_TIMEOUT (HZ*2)
74 
75 #define BPP 2
76 #define MAX_CMD_PIXELS 255
77 
78 #define RLX_HEADER_BYTES 7
79 #define MIN_RLX_PIX_BYTES 4
80 #define MIN_RLX_CMD_BYTES (RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES)
81 
82 #define RLE_HEADER_BYTES 6
83 #define MIN_RLE_PIX_BYTES 3
84 #define MIN_RLE_CMD_BYTES (RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES)
85 
86 #define RAW_HEADER_BYTES 6
87 #define MIN_RAW_PIX_BYTES 2
88 #define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
89 
90 #define DL_DEFIO_WRITE_DELAY 5 /* fb_deferred_io.delay in jiffies */
91 #define DL_DEFIO_WRITE_DISABLE (HZ*60) /* "disable" with long delay */
92 
93 /* remove these once align.h patch is taken into kernel */
94 #define DL_ALIGN_UP(x, a) ALIGN(x, a)
95 #define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), a)
96 
97 #endif