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#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
  31struct udl_device;
  32
  33struct 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
  40struct 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
  49struct udl_fbdev;
  50
  51struct 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
  71struct 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
  81struct 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 */
  90int udl_modeset_init(struct drm_device *dev);
  91void udl_modeset_restore(struct drm_device *dev);
  92void udl_modeset_cleanup(struct drm_device *dev);
  93int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
  94
  95struct drm_encoder *udl_encoder_init(struct drm_device *dev);
  96
  97struct urb *udl_get_urb(struct drm_device *dev);
  98
  99int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
 100void udl_urb_completion(struct urb *urb);
 101
 102int udl_driver_load(struct drm_device *dev, unsigned long flags);
 103void udl_driver_unload(struct drm_device *dev);
 104
 105int udl_fbdev_init(struct drm_device *dev);
 106void udl_fbdev_cleanup(struct drm_device *dev);
 107void udl_fbdev_unplug(struct drm_device *dev);
 108struct drm_framebuffer *
 109udl_fb_user_fb_create(struct drm_device *dev,
 110                      struct drm_file *file,
 111                      const struct drm_mode_fb_cmd2 *mode_cmd);
 112
 113int 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
 118int udl_dumb_create(struct drm_file *file_priv,
 119                    struct drm_device *dev,
 120                    struct drm_mode_create_dumb *args);
 121int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
 122                 uint32_t handle, uint64_t *offset);
 123
 124void udl_gem_free_object(struct drm_gem_object *gem_obj);
 125struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
 126                                            size_t size);
 127struct dma_buf *udl_gem_prime_export(struct drm_device *dev,
 128                                     struct drm_gem_object *obj, int flags);
 129struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 130                                struct dma_buf *dma_buf);
 131
 132int udl_gem_get_pages(struct udl_gem_object *obj);
 133void udl_gem_put_pages(struct udl_gem_object *obj);
 134int udl_gem_vmap(struct udl_gem_object *obj);
 135void udl_gem_vunmap(struct udl_gem_object *obj);
 136int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
 137int udl_gem_fault(struct vm_fault *vmf);
 138
 139int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
 140                      int width, int height);
 141
 142int 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
 155