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 struct udl_device; 29 30 struct urb_node { 31 struct list_head entry; 32 struct udl_device *dev; 33 struct delayed_work release_urb_work; 34 struct urb *urb; 35 }; 36 37 struct urb_list { 38 struct list_head list; 39 spinlock_t lock; 40 struct semaphore limit_sem; 41 int available; 42 int count; 43 size_t size; 44 }; 45 46 struct udl_fbdev; 47 48 struct udl_device { 49 struct device *dev; 50 struct drm_device *ddev; 51 struct usb_device *udev; 52 53 int sku_pixel_limit; 54 55 struct urb_list urbs; 56 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ 57 58 struct udl_fbdev *fbdev; 59 char mode_buf[1024]; 60 uint32_t mode_buf_len; 61 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */ 62 atomic_t bytes_identical; /* saved effort with backbuffer comparison */ 63 atomic_t bytes_sent; /* to usb, after compression including overhead */ 64 atomic_t cpu_kcycles_used; /* transpired during pixel processing */ 65 }; 66 67 struct udl_gem_object { 68 struct drm_gem_object base; 69 struct page **pages; 70 void *vmapping; 71 struct sg_table *sg; 72 }; 73 74 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base) 75 76 struct udl_framebuffer { 77 struct drm_framebuffer base; 78 struct udl_gem_object *obj; 79 bool active_16; /* active on the 16-bit channel */ 80 int x1, y1, x2, y2; /* dirty rect */ 81 spinlock_t dirty_lock; 82 }; 83 84 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base) 85 86 /* modeset */ 87 int udl_modeset_init(struct drm_device *dev); 88 void udl_modeset_cleanup(struct drm_device *dev); 89 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder); 90 91 struct drm_encoder *udl_encoder_init(struct drm_device *dev); 92 93 struct urb *udl_get_urb(struct drm_device *dev); 94 95 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len); 96 void udl_urb_completion(struct urb *urb); 97 98 int udl_driver_load(struct drm_device *dev, unsigned long flags); 99 int udl_driver_unload(struct drm_device *dev); 100 101 int udl_fbdev_init(struct drm_device *dev); 102 void udl_fbdev_cleanup(struct drm_device *dev); 103 void udl_fbdev_unplug(struct drm_device *dev); 104 struct drm_framebuffer * 105 udl_fb_user_fb_create(struct drm_device *dev, 106 struct drm_file *file, 107 struct drm_mode_fb_cmd2 *mode_cmd); 108 109 int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr, 110 const char *front, char **urb_buf_ptr, 111 u32 byte_offset, u32 device_byte_offset, u32 byte_width, 112 int *ident_ptr, int *sent_ptr); 113 114 int udl_dumb_create(struct drm_file *file_priv, 115 struct drm_device *dev, 116 struct drm_mode_create_dumb *args); 117 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev, 118 uint32_t handle, uint64_t *offset); 119 120 void udl_gem_free_object(struct drm_gem_object *gem_obj); 121 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev, 122 size_t size); 123 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev, 124 struct dma_buf *dma_buf); 125 126 int udl_gem_vmap(struct udl_gem_object *obj); 127 void udl_gem_vunmap(struct udl_gem_object *obj); 128 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); 129 int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); 130 131 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y, 132 int width, int height); 133 134 int udl_drop_usb(struct drm_device *dev); 135 136 #define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */ 137 #define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */ 138 #define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */ 139 #define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */ 140 141 #define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */ 142 #define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */ 143 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */ 144 #define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */ 145 146 #endif 147