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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
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
70struct 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
80struct udl_framebuffer {
81 struct drm_framebuffer base;
82 struct udl_gem_object *obj;
83 bool active_16; /* active on the 16-bit channel */
84 int x1, y1, x2, y2; /* dirty rect */
85 spinlock_t dirty_lock;
86};
87
88#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
89
90/* modeset */
91int udl_modeset_init(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);
103int 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_area_struct *vma, 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
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 Red Hat
4 *
5 * based in parts on udlfb.c:
6 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
7 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
8 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
9 */
10
11#ifndef UDL_DRV_H
12#define UDL_DRV_H
13
14#include <linux/mm_types.h>
15#include <linux/usb.h>
16
17#include <drm/drm_device.h>
18#include <drm/drm_framebuffer.h>
19#include <drm/drm_gem.h>
20
21struct drm_encoder;
22struct drm_mode_create_dumb;
23
24#define DRIVER_NAME "udl"
25#define DRIVER_DESC "DisplayLink"
26#define DRIVER_DATE "20120220"
27
28#define DRIVER_MAJOR 0
29#define DRIVER_MINOR 0
30#define DRIVER_PATCHLEVEL 1
31
32#define UDL_BO_CACHEABLE (1 << 0)
33#define UDL_BO_WC (1 << 1)
34
35struct udl_device;
36
37struct urb_node {
38 struct list_head entry;
39 struct udl_device *dev;
40 struct delayed_work release_urb_work;
41 struct urb *urb;
42};
43
44struct urb_list {
45 struct list_head list;
46 spinlock_t lock;
47 struct semaphore limit_sem;
48 int available;
49 int count;
50 size_t size;
51};
52
53struct udl_fbdev;
54
55struct udl_device {
56 struct drm_device drm;
57 struct device *dev;
58 struct usb_device *udev;
59 struct drm_crtc *crtc;
60
61 struct mutex gem_lock;
62
63 int sku_pixel_limit;
64
65 struct urb_list urbs;
66 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
67
68 struct udl_fbdev *fbdev;
69 char mode_buf[1024];
70 uint32_t mode_buf_len;
71 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
72 atomic_t bytes_identical; /* saved effort with backbuffer comparison */
73 atomic_t bytes_sent; /* to usb, after compression including overhead */
74 atomic_t cpu_kcycles_used; /* transpired during pixel processing */
75};
76
77#define to_udl(x) container_of(x, struct udl_device, drm)
78
79struct udl_gem_object {
80 struct drm_gem_object base;
81 struct page **pages;
82 void *vmapping;
83 struct sg_table *sg;
84 unsigned int flags;
85};
86
87#define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
88
89struct udl_framebuffer {
90 struct drm_framebuffer base;
91 struct udl_gem_object *obj;
92 bool active_16; /* active on the 16-bit channel */
93};
94
95#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
96
97/* modeset */
98int udl_modeset_init(struct drm_device *dev);
99void udl_modeset_restore(struct drm_device *dev);
100void udl_modeset_cleanup(struct drm_device *dev);
101int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
102
103struct drm_encoder *udl_encoder_init(struct drm_device *dev);
104
105struct urb *udl_get_urb(struct drm_device *dev);
106
107int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
108void udl_urb_completion(struct urb *urb);
109
110int udl_init(struct udl_device *udl);
111void udl_fini(struct drm_device *dev);
112
113int udl_fbdev_init(struct drm_device *dev);
114void udl_fbdev_cleanup(struct drm_device *dev);
115void udl_fbdev_unplug(struct drm_device *dev);
116struct drm_framebuffer *
117udl_fb_user_fb_create(struct drm_device *dev,
118 struct drm_file *file,
119 const struct drm_mode_fb_cmd2 *mode_cmd);
120
121int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
122 const char *front, char **urb_buf_ptr,
123 u32 byte_offset, u32 device_byte_offset, u32 byte_width,
124 int *ident_ptr, int *sent_ptr);
125
126int udl_dumb_create(struct drm_file *file_priv,
127 struct drm_device *dev,
128 struct drm_mode_create_dumb *args);
129int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
130 uint32_t handle, uint64_t *offset);
131
132void udl_gem_free_object(struct drm_gem_object *gem_obj);
133struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
134 size_t size);
135struct dma_buf *udl_gem_prime_export(struct drm_gem_object *obj, int flags);
136struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
137 struct dma_buf *dma_buf);
138
139int udl_gem_get_pages(struct udl_gem_object *obj);
140void udl_gem_put_pages(struct udl_gem_object *obj);
141int udl_gem_vmap(struct udl_gem_object *obj);
142void udl_gem_vunmap(struct udl_gem_object *obj);
143int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
144vm_fault_t udl_gem_fault(struct vm_fault *vmf);
145
146int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
147 int width, int height);
148
149int udl_drop_usb(struct drm_device *dev);
150
151#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
152#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
153#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
154#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
155
156#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
157#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
158#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
159#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
160
161#endif