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 31 struct udl_device; 32 33 struct 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 40 struct 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 49 struct udl_fbdev; 50 51 struct udl_device { 52 struct device *dev; 53 struct drm_device *ddev; 54 struct usb_device *udev; 55 56 int sku_pixel_limit; 57 58 struct urb_list urbs; 59 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ 60 61 struct udl_fbdev *fbdev; 62 char mode_buf[1024]; 63 uint32_t mode_buf_len; 64 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */ 65 atomic_t bytes_identical; /* saved effort with backbuffer comparison */ 66 atomic_t bytes_sent; /* to usb, after compression including overhead */ 67 atomic_t cpu_kcycles_used; /* transpired during pixel processing */ 68 }; 69 70 struct udl_gem_object { 71 struct drm_gem_object base; 72 struct page **pages; 73 void *vmapping; 74 struct sg_table *sg; 75 unsigned int flags; 76 }; 77 78 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base) 79 80 struct udl_framebuffer { 81 struct drm_framebuffer base; 82 struct udl_gem_object *obj; 83 bool active_16; /* active on the 16-bit channel */ 84 }; 85 86 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base) 87 88 /* modeset */ 89 int udl_modeset_init(struct drm_device *dev); 90 void udl_modeset_cleanup(struct drm_device *dev); 91 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder); 92 93 struct drm_encoder *udl_encoder_init(struct drm_device *dev); 94 95 struct urb *udl_get_urb(struct drm_device *dev); 96 97 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len); 98 void udl_urb_completion(struct urb *urb); 99 100 int udl_driver_load(struct drm_device *dev, unsigned long flags); 101 int udl_driver_unload(struct drm_device *dev); 102 103 int udl_fbdev_init(struct drm_device *dev); 104 void udl_fbdev_cleanup(struct drm_device *dev); 105 void udl_fbdev_unplug(struct drm_device *dev); 106 struct drm_framebuffer * 107 udl_fb_user_fb_create(struct drm_device *dev, 108 struct drm_file *file, 109 const struct drm_mode_fb_cmd2 *mode_cmd); 110 111 int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr, 112 const char *front, char **urb_buf_ptr, 113 u32 byte_offset, u32 device_byte_offset, u32 byte_width, 114 int *ident_ptr, int *sent_ptr); 115 116 int udl_dumb_create(struct drm_file *file_priv, 117 struct drm_device *dev, 118 struct drm_mode_create_dumb *args); 119 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev, 120 uint32_t handle, uint64_t *offset); 121 122 void udl_gem_free_object(struct drm_gem_object *gem_obj); 123 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev, 124 size_t size); 125 struct dma_buf *udl_gem_prime_export(struct drm_device *dev, 126 struct drm_gem_object *obj, int flags); 127 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev, 128 struct dma_buf *dma_buf); 129 130 int udl_gem_get_pages(struct udl_gem_object *obj); 131 void udl_gem_put_pages(struct udl_gem_object *obj); 132 int udl_gem_vmap(struct udl_gem_object *obj); 133 void udl_gem_vunmap(struct udl_gem_object *obj); 134 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); 135 int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); 136 137 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y, 138 int width, int height); 139 140 int udl_drop_usb(struct drm_device *dev); 141 142 #define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */ 143 #define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */ 144 #define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */ 145 #define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */ 146 147 #define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */ 148 #define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */ 149 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */ 150 #define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */ 151 152 #endif 153