LXR linux/drivers/gpu/drm/udl/udl

   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
  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
  27struct udl_device;
  28
  29struct 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
  36struct 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
  45struct udl_fbdev;
  46
  47struct 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
  65struct 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
  74struct udl_framebuffer {
  75        struct drm_framebuffer base;
  76        struct udl_gem_object *obj;
  77        bool active_16; /* active on the 16-bit channel */
  78        int x1, y1, x2, y2; /* dirty rect */
  79        spinlock_t dirty_lock;
  80};
  81
  82#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
  83
  84/* modeset */
  85int udl_modeset_init(struct drm_device *dev);
  86void udl_modeset_cleanup(struct drm_device *dev);
  87int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
  88
  89struct drm_encoder *udl_encoder_init(struct drm_device *dev);
  90
  91struct urb *udl_get_urb(struct drm_device *dev);
  92
  93int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
  94void udl_urb_completion(struct urb *urb);
  95
  96int udl_driver_load(struct drm_device *dev, unsigned long flags);
  97int udl_driver_unload(struct drm_device *dev);
  98
  99int udl_fbdev_init(struct drm_device *dev);
 100void udl_fbdev_cleanup(struct drm_device *dev);
 101void udl_fbdev_unplug(struct drm_device *dev);
 102struct drm_framebuffer *
 103udl_fb_user_fb_create(struct drm_device *dev,
 104                      struct drm_file *file,
 105                      struct drm_mode_fb_cmd2 *mode_cmd);
 106
 107int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
 108                     const char *front, char **urb_buf_ptr,
 109                     u32 byte_offset, u32 device_byte_offset, u32 byte_width,
 110                     int *ident_ptr, int *sent_ptr);
 111
 112int udl_dumb_create(struct drm_file *file_priv,
 113                    struct drm_device *dev,
 114                    struct drm_mode_create_dumb *args);
 115int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
 116                 uint32_t handle, uint64_t *offset);
 117int udl_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev,
 118                     uint32_t handle);
 119
 120int udl_gem_init_object(struct drm_gem_object *obj);
 121void udl_gem_free_object(struct drm_gem_object *gem_obj);
 122struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
 123                                            size_t size);
 124struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 125                                struct dma_buf *dma_buf);
 126
 127int udl_gem_vmap(struct udl_gem_object *obj);
 128void udl_gem_vunmap(struct udl_gem_object *obj);
 129int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
 130int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
 131
 132int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
 133                      int width, int height);
 134
 135int udl_drop_usb(struct drm_device *dev);
 136
 137#define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
 138#define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
 139#define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
 140#define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
 141
 142#define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
 143#define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
 144#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
 145#define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
 146
 147#endif
 148