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 #include <linux/mm_types.h> 20 21 #define DRIVER_NAME "udl" 22 #define DRIVER_DESC "DisplayLink" 23 #define DRIVER_DATE "20120220" 24 25 #define DRIVER_MAJOR 0 26 #define DRIVER_MINOR 0 27 #define DRIVER_PATCHLEVEL 1 28 29 #define UDL_BO_CACHEABLE (1 << 0) 30 #define UDL_BO_WC (1 << 1) 31 32 struct udl_device; 33 34 struct urb_node { 35 struct list_head entry; 36 struct udl_device *dev; 37 struct delayed_work release_urb_work; 38 struct urb *urb; 39 }; 40 41 struct urb_list { 42 struct list_head list; 43 spinlock_t lock; 44 struct semaphore limit_sem; 45 int available; 46 int count; 47 size_t size; 48 }; 49 50 struct udl_fbdev; 51 52 struct udl_device { 53 struct device *dev; 54 struct drm_device *ddev; 55 struct usb_device *udev; 56 struct drm_crtc *crtc; 57 58 struct mutex gem_lock; 59 60 int sku_pixel_limit; 61 62 struct urb_list urbs; 63 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ 64 65 struct udl_fbdev *fbdev; 66 char mode_buf[1024]; 67 uint32_t mode_buf_len; 68 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */ 69 atomic_t bytes_identical; /* saved effort with backbuffer comparison */ 70 atomic_t bytes_sent; /* to usb, after compression including overhead */ 71 atomic_t cpu_kcycles_used; /* transpired during pixel processing */ 72 }; 73 74 struct udl_gem_object { 75 struct drm_gem_object base; 76 struct page **pages; 77 void *vmapping; 78 struct sg_table *sg; 79 unsigned int flags; 80 }; 81 82 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base) 83 84 struct udl_framebuffer { 85 struct drm_framebuffer base; 86 struct udl_gem_object *obj; 87 bool active_16; /* active on the 16-bit channel */ 88 }; 89 90 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base) 91 92 /* modeset */ 93 int udl_modeset_init(struct drm_device *dev); 94 void udl_modeset_restore(struct drm_device *dev); 95 void udl_modeset_cleanup(struct drm_device *dev); 96 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder); 97 98 struct drm_encoder *udl_encoder_init(struct drm_device *dev); 99 100 struct urb *udl_get_urb(struct drm_device *dev); 101 102 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len); 103 void udl_urb_completion(struct urb *urb); 104 105 int udl_driver_load(struct drm_device *dev, unsigned long flags); 106 void udl_driver_unload(struct drm_device *dev); 107 108 int udl_fbdev_init(struct drm_device *dev); 109 void udl_fbdev_cleanup(struct drm_device *dev); 110 void udl_fbdev_unplug(struct drm_device *dev); 111 struct drm_framebuffer * 112 udl_fb_user_fb_create(struct drm_device *dev, 113 struct drm_file *file, 114 const struct drm_mode_fb_cmd2 *mode_cmd); 115 116 int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr, 117 const char *front, char **urb_buf_ptr, 118 u32 byte_offset, u32 device_byte_offset, u32 byte_width, 119 int *ident_ptr, int *sent_ptr); 120 121 int udl_dumb_create(struct drm_file *file_priv, 122 struct drm_device *dev, 123 struct drm_mode_create_dumb *args); 124 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev, 125 uint32_t handle, uint64_t *offset); 126 127 void udl_gem_free_object(struct drm_gem_object *gem_obj); 128 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev, 129 size_t size); 130 struct dma_buf *udl_gem_prime_export(struct drm_device *dev, 131 struct drm_gem_object *obj, int flags); 132 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev, 133 struct dma_buf *dma_buf); 134 135 int udl_gem_get_pages(struct udl_gem_object *obj); 136 void udl_gem_put_pages(struct udl_gem_object *obj); 137 int udl_gem_vmap(struct udl_gem_object *obj); 138 void udl_gem_vunmap(struct udl_gem_object *obj); 139 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); 140 vm_fault_t udl_gem_fault(struct vm_fault *vmf); 141 142 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y, 143 int width, int height); 144 145 int udl_drop_usb(struct drm_device *dev); 146 147 #define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */ 148 #define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */ 149 #define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */ 150 #define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */ 151 152 #define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */ 153 #define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */ 154 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */ 155 #define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */ 156 157 #endif 158