cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

udlfb.h (2976B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef UDLFB_H
      3#define UDLFB_H
      4
      5/*
      6 * TODO: Propose standard fb.h ioctl for reporting damage,
      7 * using _IOWR() and one of the existing area structs from fb.h
      8 * Consider these ioctls deprecated, but they're still used by the
      9 * DisplayLink X server as yet - need both to be modified in tandem
     10 * when new ioctl(s) are ready.
     11 */
     12#define DLFB_IOCTL_RETURN_EDID	 0xAD
     13#define DLFB_IOCTL_REPORT_DAMAGE 0xAA
     14struct dloarea {
     15	int x, y;
     16	int w, h;
     17	int x2, y2;
     18};
     19
     20struct urb_node {
     21	struct list_head entry;
     22	struct dlfb_data *dlfb;
     23	struct urb *urb;
     24};
     25
     26struct urb_list {
     27	struct list_head list;
     28	spinlock_t lock;
     29	struct semaphore limit_sem;
     30	int available;
     31	int count;
     32	size_t size;
     33};
     34
     35struct dlfb_data {
     36	struct usb_device *udev;
     37	struct fb_info *info;
     38	struct urb_list urbs;
     39	char *backing_buffer;
     40	int fb_count;
     41	bool virtualized; /* true when physical usb device not present */
     42	atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
     43	atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
     44	char *edid; /* null until we read edid from hw or get from sysfs */
     45	size_t edid_size;
     46	int sku_pixel_limit;
     47	int base16;
     48	int base8;
     49	u32 pseudo_palette[256];
     50	int blank_mode; /*one of FB_BLANK_ */
     51	struct mutex render_mutex;
     52	int damage_x;
     53	int damage_y;
     54	int damage_x2;
     55	int damage_y2;
     56	spinlock_t damage_lock;
     57	struct work_struct damage_work;
     58	struct fb_ops ops;
     59	/* blit-only rendering path metrics, exposed through sysfs */
     60	atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
     61	atomic_t bytes_identical; /* saved effort with backbuffer comparison */
     62	atomic_t bytes_sent; /* to usb, after compression including overhead */
     63	atomic_t cpu_kcycles_used; /* transpired during pixel processing */
     64	struct fb_var_screeninfo current_mode;
     65	struct list_head deferred_free;
     66};
     67
     68#define NR_USB_REQUEST_I2C_SUB_IO 0x02
     69#define NR_USB_REQUEST_CHANNEL 0x12
     70
     71/* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
     72#define BULK_SIZE 512
     73#define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
     74#define WRITES_IN_FLIGHT (4)
     75
     76#define MAX_VENDOR_DESCRIPTOR_SIZE 256
     77
     78#define GET_URB_TIMEOUT	HZ
     79#define FREE_URB_TIMEOUT (HZ*2)
     80
     81#define BPP                     2
     82#define MAX_CMD_PIXELS		255
     83
     84#define RLX_HEADER_BYTES	7
     85#define MIN_RLX_PIX_BYTES       4
     86#define MIN_RLX_CMD_BYTES	(RLX_HEADER_BYTES + MIN_RLX_PIX_BYTES)
     87
     88#define RLE_HEADER_BYTES	6
     89#define MIN_RLE_PIX_BYTES	3
     90#define MIN_RLE_CMD_BYTES	(RLE_HEADER_BYTES + MIN_RLE_PIX_BYTES)
     91
     92#define RAW_HEADER_BYTES	6
     93#define MIN_RAW_PIX_BYTES	2
     94#define MIN_RAW_CMD_BYTES	(RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES)
     95
     96#define DL_DEFIO_WRITE_DELAY    msecs_to_jiffies(HZ <= 300 ? 4 : 10) /* optimal value for 720p video */
     97#define DL_DEFIO_WRITE_DISABLE  (HZ*60) /* "disable" with long delay */
     98
     99/* remove these once align.h patch is taken into kernel */
    100#define DL_ALIGN_UP(x, a) ALIGN(x, a)
    101#define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
    102
    103#endif