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-rw-r--r--drivers/input/Kconfig9
-rw-r--r--drivers/input/Makefile2
-rw-r--r--drivers/input/xen-kbdfront.c340
-rw-r--r--drivers/video/Kconfig14
-rw-r--r--drivers/video/Makefile1
-rw-r--r--drivers/video/xen-fbfront.c550
-rw-r--r--include/xen/interface/io/fbif.h124
-rw-r--r--include/xen/interface/io/kbdif.h114
8 files changed, 1154 insertions, 0 deletions
diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig
index 9dea14db72..5f9d860925 100644
--- a/drivers/input/Kconfig
+++ b/drivers/input/Kconfig
@@ -149,6 +149,15 @@ config INPUT_APMPOWER
149 To compile this driver as a module, choose M here: the 149 To compile this driver as a module, choose M here: the
150 module will be called apm-power. 150 module will be called apm-power.
151 151
152config XEN_KBDDEV_FRONTEND
153 tristate "Xen virtual keyboard and mouse support"
154 depends on XEN_FBDEV_FRONTEND
155 default y
156 help
157 This driver implements the front-end of the Xen virtual
158 keyboard and mouse device driver. It communicates with a back-end
159 in another domain.
160
152comment "Input Device Drivers" 161comment "Input Device Drivers"
153 162
154source "drivers/input/keyboard/Kconfig" 163source "drivers/input/keyboard/Kconfig"
diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index 2ae87b19ca..98c4f9a778 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -23,3 +23,5 @@ obj-$(CONFIG_INPUT_TOUCHSCREEN) += touchscreen/
23obj-$(CONFIG_INPUT_MISC) += misc/ 23obj-$(CONFIG_INPUT_MISC) += misc/
24 24
25obj-$(CONFIG_INPUT_APMPOWER) += apm-power.o 25obj-$(CONFIG_INPUT_APMPOWER) += apm-power.o
26
27obj-$(CONFIG_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o
diff --git a/drivers/input/xen-kbdfront.c b/drivers/input/xen-kbdfront.c
new file mode 100644
index 0000000000..0f47f4697c
--- /dev/null
+++ b/drivers/input/xen-kbdfront.c
@@ -0,0 +1,340 @@
1/*
2 * Xen para-virtual input device
3 *
4 * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
5 * Copyright (C) 2006-2008 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
6 *
7 * Based on linux/drivers/input/mouse/sermouse.c
8 *
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive for
11 * more details.
12 */
13
14/*
15 * TODO:
16 *
17 * Switch to grant tables together with xen-fbfront.c.
18 */
19
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/module.h>
23#include <linux/input.h>
24#include <asm/xen/hypervisor.h>
25#include <xen/events.h>
26#include <xen/page.h>
27#include <xen/interface/io/fbif.h>
28#include <xen/interface/io/kbdif.h>
29#include <xen/xenbus.h>
30
31struct xenkbd_info {
32 struct input_dev *kbd;
33 struct input_dev *ptr;
34 struct xenkbd_page *page;
35 int irq;
36 struct xenbus_device *xbdev;
37 char phys[32];
38};
39
40static int xenkbd_remove(struct xenbus_device *);
41static int xenkbd_connect_backend(struct xenbus_device *, struct xenkbd_info *);
42static void xenkbd_disconnect_backend(struct xenkbd_info *);
43
44/*
45 * Note: if you need to send out events, see xenfb_do_update() for how
46 * to do that.
47 */
48
49static irqreturn_t input_handler(int rq, void *dev_id)
50{
51 struct xenkbd_info *info = dev_id;
52 struct xenkbd_page *page = info->page;
53 __u32 cons, prod;
54
55 prod = page->in_prod;
56 if (prod == page->in_cons)
57 return IRQ_HANDLED;
58 rmb(); /* ensure we see ring contents up to prod */
59 for (cons = page->in_cons; cons != prod; cons++) {
60 union xenkbd_in_event *event;
61 struct input_dev *dev;
62 event = &XENKBD_IN_RING_REF(page, cons);
63
64 dev = info->ptr;
65 switch (event->type) {
66 case XENKBD_TYPE_MOTION:
67 input_report_rel(dev, REL_X, event->motion.rel_x);
68 input_report_rel(dev, REL_Y, event->motion.rel_y);
69 break;
70 case XENKBD_TYPE_KEY:
71 dev = NULL;
72 if (test_bit(event->key.keycode, info->kbd->keybit))
73 dev = info->kbd;
74 if (test_bit(event->key.keycode, info->ptr->keybit))
75 dev = info->ptr;
76 if (dev)
77 input_report_key(dev, event->key.keycode,
78 event->key.pressed);
79 else
80 printk(KERN_WARNING
81 "xenkbd: unhandled keycode 0x%x\n",
82 event->key.keycode);
83 break;
84 case XENKBD_TYPE_POS:
85 input_report_abs(dev, ABS_X, event->pos.abs_x);
86 input_report_abs(dev, ABS_Y, event->pos.abs_y);
87 break;
88 }
89 if (dev)
90 input_sync(dev);
91 }
92 mb(); /* ensure we got ring contents */
93 page->in_cons = cons;
94 notify_remote_via_irq(info->irq);
95
96 return IRQ_HANDLED;
97}
98
99static int __devinit xenkbd_probe(struct xenbus_device *dev,
100 const struct xenbus_device_id *id)
101{
102 int ret, i;
103 struct xenkbd_info *info;
104 struct input_dev *kbd, *ptr;
105
106 info = kzalloc(sizeof(*info), GFP_KERNEL);
107 if (!info) {
108 xenbus_dev_fatal(dev, -ENOMEM, "allocating info structure");
109 return -ENOMEM;
110 }
111 dev->dev.driver_data = info;
112 info->xbdev = dev;
113 info->irq = -1;
114 snprintf(info->phys, sizeof(info->phys), "xenbus/%s", dev->nodename);
115
116 info->page = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
117 if (!info->page)
118 goto error_nomem;
119
120 /* keyboard */
121 kbd = input_allocate_device();
122 if (!kbd)
123 goto error_nomem;
124 kbd->name = "Xen Virtual Keyboard";
125 kbd->phys = info->phys;
126 kbd->id.bustype = BUS_PCI;
127 kbd->id.vendor = 0x5853;
128 kbd->id.product = 0xffff;
129 kbd->evbit[0] = BIT(EV_KEY);
130 for (i = KEY_ESC; i < KEY_UNKNOWN; i++)
131 set_bit(i, kbd->keybit);
132 for (i = KEY_OK; i < KEY_MAX; i++)
133 set_bit(i, kbd->keybit);
134
135 ret = input_register_device(kbd);
136 if (ret) {
137 input_free_device(kbd);
138 xenbus_dev_fatal(dev, ret, "input_register_device(kbd)");
139 goto error;
140 }
141 info->kbd = kbd;
142
143 /* pointing device */
144 ptr = input_allocate_device();
145 if (!ptr)
146 goto error_nomem;
147 ptr->name = "Xen Virtual Pointer";
148 ptr->phys = info->phys;
149 ptr->id.bustype = BUS_PCI;
150 ptr->id.vendor = 0x5853;
151 ptr->id.product = 0xfffe;
152 ptr->evbit[0] = BIT(EV_KEY) | BIT(EV_REL) | BIT(EV_ABS);
153 for (i = BTN_LEFT; i <= BTN_TASK; i++)
154 set_bit(i, ptr->keybit);
155 ptr->relbit[0] = BIT(REL_X) | BIT(REL_Y);
156 input_set_abs_params(ptr, ABS_X, 0, XENFB_WIDTH, 0, 0);
157 input_set_abs_params(ptr, ABS_Y, 0, XENFB_HEIGHT, 0, 0);
158
159 ret = input_register_device(ptr);
160 if (ret) {
161 input_free_device(ptr);
162 xenbus_dev_fatal(dev, ret, "input_register_device(ptr)");
163 goto error;
164 }
165 info->ptr = ptr;
166
167 ret = xenkbd_connect_backend(dev, info);
168 if (ret < 0)
169 goto error;
170
171 return 0;
172
173 error_nomem:
174 ret = -ENOMEM;
175 xenbus_dev_fatal(dev, ret, "allocating device memory");
176 error:
177 xenkbd_remove(dev);
178 return ret;
179}
180
181static int xenkbd_resume(struct xenbus_device *dev)
182{
183 struct xenkbd_info *info = dev->dev.driver_data;
184
185 xenkbd_disconnect_backend(info);
186 memset(info->page, 0, PAGE_SIZE);
187 return xenkbd_connect_backend(dev, info);
188}
189
190static int xenkbd_remove(struct xenbus_device *dev)
191{
192 struct xenkbd_info *info = dev->dev.driver_data;
193
194 xenkbd_disconnect_backend(info);
195 if (info->kbd)
196 input_unregister_device(info->kbd);
197 if (info->ptr)
198 input_unregister_device(info->ptr);
199 free_page((unsigned long)info->page);
200 kfree(info);
201 return 0;
202}
203
204static int xenkbd_connect_backend(struct xenbus_device *dev,
205 struct xenkbd_info *info)
206{
207 int ret, evtchn;
208 struct xenbus_transaction xbt;
209
210 ret = xenbus_alloc_evtchn(dev, &evtchn);
211 if (ret)
212 return ret;
213 ret = bind_evtchn_to_irqhandler(evtchn, input_handler,
214 0, dev->devicetype, info);
215 if (ret < 0) {
216 xenbus_free_evtchn(dev, evtchn);
217 xenbus_dev_fatal(dev, ret, "bind_evtchn_to_irqhandler");
218 return ret;
219 }
220 info->irq = ret;
221
222 again:
223 ret = xenbus_transaction_start(&xbt);
224 if (ret) {
225 xenbus_dev_fatal(dev, ret, "starting transaction");
226 return ret;
227 }
228 ret = xenbus_printf(xbt, dev->nodename, "page-ref", "%lu",
229 virt_to_mfn(info->page));
230 if (ret)
231 goto error_xenbus;
232 ret = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
233 evtchn);
234 if (ret)
235 goto error_xenbus;
236 ret = xenbus_transaction_end(xbt, 0);
237 if (ret) {
238 if (ret == -EAGAIN)
239 goto again;
240 xenbus_dev_fatal(dev, ret, "completing transaction");
241 return ret;
242 }
243
244 xenbus_switch_state(dev, XenbusStateInitialised);
245 return 0;
246
247 error_xenbus:
248 xenbus_transaction_end(xbt, 1);
249 xenbus_dev_fatal(dev, ret, "writing xenstore");
250 return ret;
251}
252
253static void xenkbd_disconnect_backend(struct xenkbd_info *info)
254{
255 if (info->irq >= 0)
256 unbind_from_irqhandler(info->irq, info);
257 info->irq = -1;
258}
259
260static void xenkbd_backend_changed(struct xenbus_device *dev,
261 enum xenbus_state backend_state)
262{
263 struct xenkbd_info *info = dev->dev.driver_data;
264 int ret, val;
265
266 switch (backend_state) {
267 case XenbusStateInitialising:
268 case XenbusStateInitialised:
269 case XenbusStateUnknown:
270 case XenbusStateClosed:
271 break;
272
273 case XenbusStateInitWait:
274InitWait:
275 ret = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
276 "feature-abs-pointer", "%d", &val);
277 if (ret < 0)
278 val = 0;
279 if (val) {
280 ret = xenbus_printf(XBT_NIL, info->xbdev->nodename,
281 "request-abs-pointer", "1");
282 if (ret)
283 printk(KERN_WARNING
284 "xenkbd: can't request abs-pointer");
285 }
286 xenbus_switch_state(dev, XenbusStateConnected);
287 break;
288
289 case XenbusStateConnected:
290 /*
291 * Work around xenbus race condition: If backend goes
292 * through InitWait to Connected fast enough, we can
293 * get Connected twice here.
294 */
295 if (dev->state != XenbusStateConnected)
296 goto InitWait; /* no InitWait seen yet, fudge it */
297 break;
298
299 case XenbusStateClosing:
300 xenbus_frontend_closed(dev);
301 break;
302 }
303}
304
305static struct xenbus_device_id xenkbd_ids[] = {
306 { "vkbd" },
307 { "" }
308};
309
310static struct xenbus_driver xenkbd = {
311 .name = "vkbd",
312 .owner = THIS_MODULE,
313 .ids = xenkbd_ids,
314 .probe = xenkbd_probe,
315 .remove = xenkbd_remove,
316 .resume = xenkbd_resume,
317 .otherend_changed = xenkbd_backend_changed,
318};
319
320static int __init xenkbd_init(void)
321{
322 if (!is_running_on_xen())
323 return -ENODEV;
324
325 /* Nothing to do if running in dom0. */
326 if (is_initial_xendomain())
327 return -ENODEV;
328
329 return xenbus_register_frontend(&xenkbd);
330}
331
332static void __exit xenkbd_cleanup(void)
333{
334 xenbus_unregister_driver(&xenkbd);
335}
336
337module_init(xenkbd_init);
338module_exit(xenkbd_cleanup);
339
340MODULE_LICENSE("GPL");
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 1bd5fb3023..e3dc8f8d0c 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1930,6 +1930,20 @@ config FB_VIRTUAL
1930 1930
1931 If unsure, say N. 1931 If unsure, say N.
1932 1932
1933config XEN_FBDEV_FRONTEND
1934 tristate "Xen virtual frame buffer support"
1935 depends on FB && XEN
1936 select FB_SYS_FILLRECT
1937 select FB_SYS_COPYAREA
1938 select FB_SYS_IMAGEBLIT
1939 select FB_SYS_FOPS
1940 select FB_DEFERRED_IO
1941 default y
1942 help
1943 This driver implements the front-end of the Xen virtual
1944 frame buffer driver. It communicates with a back-end
1945 in another domain.
1946
1933source "drivers/video/omap/Kconfig" 1947source "drivers/video/omap/Kconfig"
1934 1948
1935source "drivers/video/backlight/Kconfig" 1949source "drivers/video/backlight/Kconfig"
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 11c0e5e05f..f172b9b733 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -114,6 +114,7 @@ obj-$(CONFIG_FB_PS3) += ps3fb.o
114obj-$(CONFIG_FB_SM501) += sm501fb.o 114obj-$(CONFIG_FB_SM501) += sm501fb.o
115obj-$(CONFIG_FB_XILINX) += xilinxfb.o 115obj-$(CONFIG_FB_XILINX) += xilinxfb.o
116obj-$(CONFIG_FB_OMAP) += omap/ 116obj-$(CONFIG_FB_OMAP) += omap/
117obj-$(CONFIG_XEN_FBDEV_FRONTEND) += xen-fbfront.o
117 118
118# Platform or fallback drivers go here 119# Platform or fallback drivers go here
119obj-$(CONFIG_FB_UVESA) += uvesafb.o 120obj-$(CONFIG_FB_UVESA) += uvesafb.o
diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
new file mode 100644
index 0000000000..619a6f8d65
--- /dev/null
+++ b/drivers/video/xen-fbfront.c
@@ -0,0 +1,550 @@
1/*
2 * Xen para-virtual frame buffer device
3 *
4 * Copyright (C) 2005-2006 Anthony Liguori <aliguori@us.ibm.com>
5 * Copyright (C) 2006-2008 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
6 *
7 * Based on linux/drivers/video/q40fb.c
8 *
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive for
11 * more details.
12 */
13
14/*
15 * TODO:
16 *
17 * Switch to grant tables when they become capable of dealing with the
18 * frame buffer.
19 */
20
21#include <linux/kernel.h>
22#include <linux/errno.h>
23#include <linux/fb.h>
24#include <linux/module.h>
25#include <linux/vmalloc.h>
26#include <linux/mm.h>
27#include <asm/xen/hypervisor.h>
28#include <xen/events.h>
29#include <xen/page.h>
30#include <xen/interface/io/fbif.h>
31#include <xen/interface/io/protocols.h>
32#include <xen/xenbus.h>
33
34struct xenfb_info {
35 unsigned char *fb;
36 struct fb_info *fb_info;
37 int x1, y1, x2, y2; /* dirty rectangle,
38 protected by dirty_lock */
39 spinlock_t dirty_lock;
40 int nr_pages;
41 int irq;
42 struct xenfb_page *page;
43 unsigned long *mfns;
44 int update_wanted; /* XENFB_TYPE_UPDATE wanted */
45
46 struct xenbus_device *xbdev;
47};
48
49static u32 xenfb_mem_len = XENFB_WIDTH * XENFB_HEIGHT * XENFB_DEPTH / 8;
50
51static int xenfb_remove(struct xenbus_device *);
52static void xenfb_init_shared_page(struct xenfb_info *);
53static int xenfb_connect_backend(struct xenbus_device *, struct xenfb_info *);
54static void xenfb_disconnect_backend(struct xenfb_info *);
55
56static void xenfb_do_update(struct xenfb_info *info,
57 int x, int y, int w, int h)
58{
59 union xenfb_out_event event;
60 u32 prod;
61
62 event.type = XENFB_TYPE_UPDATE;
63 event.update.x = x;
64 event.update.y = y;
65 event.update.width = w;
66 event.update.height = h;
67
68 prod = info->page->out_prod;
69 /* caller ensures !xenfb_queue_full() */
70 mb(); /* ensure ring space available */
71 XENFB_OUT_RING_REF(info->page, prod) = event;
72 wmb(); /* ensure ring contents visible */
73 info->page->out_prod = prod + 1;
74
75 notify_remote_via_irq(info->irq);
76}
77
78static int xenfb_queue_full(struct xenfb_info *info)
79{
80 u32 cons, prod;
81
82 prod = info->page->out_prod;
83 cons = info->page->out_cons;
84 return prod - cons == XENFB_OUT_RING_LEN;
85}
86
87static void xenfb_refresh(struct xenfb_info *info,
88 int x1, int y1, int w, int h)
89{
90 unsigned long flags;
91 int y2 = y1 + h - 1;
92 int x2 = x1 + w - 1;
93
94 if (!info->update_wanted)
95 return;
96
97 spin_lock_irqsave(&info->dirty_lock, flags);
98
99 /* Combine with dirty rectangle: */
100 if (info->y1 < y1)
101 y1 = info->y1;
102 if (info->y2 > y2)
103 y2 = info->y2;
104 if (info->x1 < x1)
105 x1 = info->x1;
106 if (info->x2 > x2)
107 x2 = info->x2;
108
109 if (xenfb_queue_full(info)) {
110 /* Can't send right now, stash it in the dirty rectangle */
111 info->x1 = x1;
112 info->x2 = x2;
113 info->y1 = y1;
114 info->y2 = y2;
115 spin_unlock_irqrestore(&info->dirty_lock, flags);
116 return;
117 }
118
119 /* Clear dirty rectangle: */
120 info->x1 = info->y1 = INT_MAX;
121 info->x2 = info->y2 = 0;
122
123 spin_unlock_irqrestore(&info->dirty_lock, flags);
124
125 if (x1 <= x2 && y1 <= y2)
126 xenfb_do_update(info, x1, y1, x2 - x1 + 1, y2 - y1 + 1);
127}
128
129static void xenfb_deferred_io(struct fb_info *fb_info,
130 struct list_head *pagelist)
131{
132 struct xenfb_info *info = fb_info->par;
133 struct page *page;
134 unsigned long beg, end;
135 int y1, y2, miny, maxy;
136
137 miny = INT_MAX;
138 maxy = 0;
139 list_for_each_entry(page, pagelist, lru) {
140 beg = page->index << PAGE_SHIFT;
141 end = beg + PAGE_SIZE - 1;
142 y1 = beg / fb_info->fix.line_length;
143 y2 = end / fb_info->fix.line_length;
144 if (y2 >= fb_info->var.yres)
145 y2 = fb_info->var.yres - 1;
146 if (miny > y1)
147 miny = y1;
148 if (maxy < y2)
149 maxy = y2;
150 }
151 xenfb_refresh(info, 0, miny, fb_info->var.xres, maxy - miny + 1);
152}
153
154static struct fb_deferred_io xenfb_defio = {
155 .delay = HZ / 20,
156 .deferred_io = xenfb_deferred_io,
157};
158
159static int xenfb_setcolreg(unsigned regno, unsigned red, unsigned green,
160 unsigned blue, unsigned transp,
161 struct fb_info *info)
162{
163 u32 v;
164
165 if (regno > info->cmap.len)
166 return 1;
167
168#define CNVT_TOHW(val, width) ((((val)<<(width))+0x7FFF-(val))>>16)
169 red = CNVT_TOHW(red, info->var.red.length);
170 green = CNVT_TOHW(green, info->var.green.length);
171 blue = CNVT_TOHW(blue, info->var.blue.length);
172 transp = CNVT_TOHW(transp, info->var.transp.length);
173#undef CNVT_TOHW
174
175 v = (red << info->var.red.offset) |
176 (green << info->var.green.offset) |
177 (blue << info->var.blue.offset);
178
179 switch (info->var.bits_per_pixel) {
180 case 16:
181 case 24:
182 case 32:
183 ((u32 *)info->pseudo_palette)[regno] = v;
184 break;
185 }
186
187 return 0;
188}
189
190static void xenfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
191{
192 struct xenfb_info *info = p->par;
193
194 sys_fillrect(p, rect);
195 xenfb_refresh(info, rect->dx, rect->dy, rect->width, rect->height);
196}
197
198static void xenfb_imageblit(struct fb_info *p, const struct fb_image *image)
199{
200 struct xenfb_info *info = p->par;
201
202 sys_imageblit(p, image);
203 xenfb_refresh(info, image->dx, image->dy, image->width, image->height);
204}
205
206static void xenfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
207{
208 struct xenfb_info *info = p->par;
209
210 sys_copyarea(p, area);
211 xenfb_refresh(info, area->dx, area->dy, area->width, area->height);
212}
213
214static ssize_t xenfb_write(struct fb_info *p, const char __user *buf,
215 size_t count, loff_t *ppos)
216{
217 struct xenfb_info *info = p->par;
218 ssize_t res;
219
220 res = fb_sys_write(p, buf, count, ppos);
221 xenfb_refresh(info, 0, 0, info->page->width, info->page->height);
222 return res;
223}
224
225static struct fb_ops xenfb_fb_ops = {
226 .owner = THIS_MODULE,
227 .fb_read = fb_sys_read,
228 .fb_write = xenfb_write,
229 .fb_setcolreg = xenfb_setcolreg,
230 .fb_fillrect = xenfb_fillrect,
231 .fb_copyarea = xenfb_copyarea,
232 .fb_imageblit = xenfb_imageblit,
233};
234
235static irqreturn_t xenfb_event_handler(int rq, void *dev_id)
236{
237 /*
238 * No in events recognized, simply ignore them all.
239 * If you need to recognize some, see xen-kbdfront's
240 * input_handler() for how to do that.
241 */
242 struct xenfb_info *info = dev_id;
243 struct xenfb_page *page = info->page;
244
245 if (page->in_cons != page->in_prod) {
246 info->page->in_cons = info->page->in_prod;
247 notify_remote_via_irq(info->irq);
248 }
249
250 /* Flush dirty rectangle: */
251 xenfb_refresh(info, INT_MAX, INT_MAX, -INT_MAX, -INT_MAX);
252
253 return IRQ_HANDLED;
254}
255
256static int __devinit xenfb_probe(struct xenbus_device *dev,
257 const struct xenbus_device_id *id)
258{
259 struct xenfb_info *info;
260 struct fb_info *fb_info;
261 int ret;
262
263 info = kzalloc(sizeof(*info), GFP_KERNEL);
264 if (info == NULL) {
265 xenbus_dev_fatal(dev, -ENOMEM, "allocating info structure");
266 return -ENOMEM;
267 }
268 dev->dev.driver_data = info;
269 info->xbdev = dev;
270 info->irq = -1;
271 info->x1 = info->y1 = INT_MAX;
272 spin_lock_init(&info->dirty_lock);
273
274 info->fb = vmalloc(xenfb_mem_len);
275 if (info->fb == NULL)
276 goto error_nomem;
277 memset(info->fb, 0, xenfb_mem_len);
278
279 info->nr_pages = (xenfb_mem_len + PAGE_SIZE - 1) >> PAGE_SHIFT;
280
281 info->mfns = vmalloc(sizeof(unsigned long) * info->nr_pages);
282 if (!info->mfns)
283 goto error_nomem;
284
285 /* set up shared page */
286 info->page = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
287 if (!info->page)
288 goto error_nomem;
289
290 xenfb_init_shared_page(info);
291
292 /* abusing framebuffer_alloc() to allocate pseudo_palette */
293 fb_info = framebuffer_alloc(sizeof(u32) * 256, NULL);
294 if (fb_info == NULL)
295 goto error_nomem;
296
297 /* complete the abuse: */
298 fb_info->pseudo_palette = fb_info->par;
299 fb_info->par = info;
300
301 fb_info->screen_base = info->fb;
302
303 fb_info->fbops = &xenfb_fb_ops;
304 fb_info->var.xres_virtual = fb_info->var.xres = info->page->width;
305 fb_info->var.yres_virtual = fb_info->var.yres = info->page->height;
306 fb_info->var.bits_per_pixel = info->page->depth;
307
308 fb_info->var.red = (struct fb_bitfield){16, 8, 0};
309 fb_info->var.green = (struct fb_bitfield){8, 8, 0};
310 fb_info->var.blue = (struct fb_bitfield){0, 8, 0};
311
312 fb_info->var.activate = FB_ACTIVATE_NOW;
313 fb_info->var.height = -1;
314 fb_info->var.width = -1;
315 fb_info->var.vmode = FB_VMODE_NONINTERLACED;
316
317 fb_info->fix.visual = FB_VISUAL_TRUECOLOR;
318 fb_info->fix.line_length = info->page->line_length;
319 fb_info->fix.smem_start = 0;
320 fb_info->fix.smem_len = xenfb_mem_len;
321 strcpy(fb_info->fix.id, "xen");
322 fb_info->fix.type = FB_TYPE_PACKED_PIXELS;
323 fb_info->fix.accel = FB_ACCEL_NONE;
324
325 fb_info->flags = FBINFO_FLAG_DEFAULT;
326
327 ret = fb_alloc_cmap(&fb_info->cmap, 256, 0);
328 if (ret < 0) {
329 framebuffer_release(fb_info);
330 xenbus_dev_fatal(dev, ret, "fb_alloc_cmap");
331 goto error;
332 }
333
334 fb_info->fbdefio = &xenfb_defio;
335 fb_deferred_io_init(fb_info);
336
337 ret = register_framebuffer(fb_info);
338 if (ret) {
339 fb_deferred_io_cleanup(fb_info);
340 fb_dealloc_cmap(&fb_info->cmap);
341 framebuffer_release(fb_info);
342 xenbus_dev_fatal(dev, ret, "register_framebuffer");
343 goto error;
344 }
345 info->fb_info = fb_info;
346
347 ret = xenfb_connect_backend(dev, info);
348 if (ret < 0)
349 goto error;
350
351 return 0;
352
353 error_nomem:
354 ret = -ENOMEM;
355 xenbus_dev_fatal(dev, ret, "allocating device memory");
356 error:
357 xenfb_remove(dev);
358 return ret;
359}
360
361static int xenfb_resume(struct xenbus_device *dev)
362{
363 struct xenfb_info *info = dev->dev.driver_data;
364
365 xenfb_disconnect_backend(info);
366 xenfb_init_shared_page(info);
367 return xenfb_connect_backend(dev, info);
368}
369
370static int xenfb_remove(struct xenbus_device *dev)
371{
372 struct xenfb_info *info = dev->dev.driver_data;
373
374 xenfb_disconnect_backend(info);
375 if (info->fb_info) {
376 fb_deferred_io_cleanup(info->fb_info);
377 unregister_framebuffer(info->fb_info);
378 fb_dealloc_cmap(&info->fb_info->cmap);
379 framebuffer_release(info->fb_info);
380 }
381 free_page((unsigned long)info->page);
382 vfree(info->mfns);
383 vfree(info->fb);
384 kfree(info);
385
386 return 0;
387}
388
389static unsigned long vmalloc_to_mfn(void *address)
390{
391 return pfn_to_mfn(vmalloc_to_pfn(address));
392}
393
394static void xenfb_init_shared_page(struct xenfb_info *info)
395{
396 int i;
397
398 for (i = 0; i < info->nr_pages; i++)
399 info->mfns[i] = vmalloc_to_mfn(info->fb + i * PAGE_SIZE);
400
401 info->page->pd[0] = vmalloc_to_mfn(info->mfns);
402 info->page->pd[1] = 0;
403 info->page->width = XENFB_WIDTH;
404 info->page->height = XENFB_HEIGHT;
405 info->page->depth = XENFB_DEPTH;
406 info->page->line_length = (info->page->depth / 8) * info->page->width;
407 info->page->mem_length = xenfb_mem_len;
408 info->page->in_cons = info->page->in_prod = 0;
409 info->page->out_cons = info->page->out_prod = 0;
410}
411
412static int xenfb_connect_backend(struct xenbus_device *dev,
413 struct xenfb_info *info)
414{
415 int ret, evtchn;
416 struct xenbus_transaction xbt;
417
418 ret = xenbus_alloc_evtchn(dev, &evtchn);
419 if (ret)
420 return ret;
421 ret = bind_evtchn_to_irqhandler(evtchn, xenfb_event_handler,
422 0, dev->devicetype, info);
423 if (ret < 0) {
424 xenbus_free_evtchn(dev, evtchn);
425 xenbus_dev_fatal(dev, ret, "bind_evtchn_to_irqhandler");
426 return ret;
427 }
428 info->irq = ret;
429
430 again:
431 ret = xenbus_transaction_start(&xbt);
432 if (ret) {
433 xenbus_dev_fatal(dev, ret, "starting transaction");
434 return ret;
435 }
436 ret = xenbus_printf(xbt, dev->nodename, "page-ref", "%lu",
437 virt_to_mfn(info->page));
438 if (ret)
439 goto error_xenbus;
440 ret = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
441 evtchn);
442 if (ret)
443 goto error_xenbus;
444 ret = xenbus_printf(xbt, dev->nodename, "protocol", "%s",
445 XEN_IO_PROTO_ABI_NATIVE);
446 if (ret)
447 goto error_xenbus;
448 ret = xenbus_printf(xbt, dev->nodename, "feature-update", "1");
449 if (ret)
450 goto error_xenbus;
451 ret = xenbus_transaction_end(xbt, 0);
452 if (ret) {
453 if (ret == -EAGAIN)
454 goto again;
455 xenbus_dev_fatal(dev, ret, "completing transaction");
456 return ret;
457 }
458
459 xenbus_switch_state(dev, XenbusStateInitialised);
460 return 0;
461
462 error_xenbus:
463 xenbus_transaction_end(xbt, 1);
464 xenbus_dev_fatal(dev, ret, "writing xenstore");
465 return ret;
466}
467
468static void xenfb_disconnect_backend(struct xenfb_info *info)
469{
470 if (info->irq >= 0)
471 unbind_from_irqhandler(info->irq, info);
472 info->irq = -1;
473}
474
475static void xenfb_backend_changed(struct xenbus_device *dev,
476 enum xenbus_state backend_state)
477{
478 struct xenfb_info *info = dev->dev.driver_data;
479 int val;
480
481 switch (backend_state) {
482 case XenbusStateInitialising:
483 case XenbusStateInitialised:
484 case XenbusStateUnknown:
485 case XenbusStateClosed:
486 break;
487
488 case XenbusStateInitWait:
489InitWait:
490 xenbus_switch_state(dev, XenbusStateConnected);
491 break;
492
493 case XenbusStateConnected:
494 /*
495 * Work around xenbus race condition: If backend goes
496 * through InitWait to Connected fast enough, we can
497 * get Connected twice here.
498 */
499 if (dev->state != XenbusStateConnected)
500 goto InitWait; /* no InitWait seen yet, fudge it */
501
502 if (xenbus_scanf(XBT_NIL, info->xbdev->otherend,
503 "request-update", "%d", &val) < 0)
504 val = 0;
505 if (val)
506 info->update_wanted = 1;
507 break;
508
509 case XenbusStateClosing:
510 xenbus_frontend_closed(dev);
511 break;
512 }
513}
514
515static struct xenbus_device_id xenfb_ids[] = {
516 { "vfb" },
517 { "" }
518};
519
520static struct xenbus_driver xenfb = {
521 .name = "vfb",
522 .owner = THIS_MODULE,
523 .ids = xenfb_ids,
524 .probe = xenfb_probe,
525 .remove = xenfb_remove,
526 .resume = xenfb_resume,
527 .otherend_changed = xenfb_backend_changed,
528};
529
530static int __init xenfb_init(void)
531{
532 if (!is_running_on_xen())
533 return -ENODEV;
534
535 /* Nothing to do if running in dom0. */
536 if (is_initial_xendomain())
537 return -ENODEV;
538
539 return xenbus_register_frontend(&xenfb);
540}
541
542static void __exit xenfb_cleanup(void)
543{
544 xenbus_unregister_driver(&xenfb);
545}
546
547module_init(xenfb_init);
548module_exit(xenfb_cleanup);
549
550MODULE_LICENSE("GPL");
diff --git a/include/xen/interface/io/fbif.h b/include/xen/interface/io/fbif.h
new file mode 100644
index 0000000000..5a934dd779
--- /dev/null
+++ b/include/xen/interface/io/fbif.h
@@ -0,0 +1,124 @@
1/*
2 * fbif.h -- Xen virtual frame buffer device
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to
6 * deal in the Software without restriction, including without limitation the
7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8 * sell copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 *
22 * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
23 * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
24 */
25
26#ifndef __XEN_PUBLIC_IO_FBIF_H__
27#define __XEN_PUBLIC_IO_FBIF_H__
28
29/* Out events (frontend -> backend) */
30
31/*
32 * Out events may be sent only when requested by backend, and receipt
33 * of an unknown out event is an error.
34 */
35
36/* Event type 1 currently not used */
37/*
38 * Framebuffer update notification event
39 * Capable frontend sets feature-update in xenstore.
40 * Backend requests it by setting request-update in xenstore.
41 */
42#define XENFB_TYPE_UPDATE 2
43
44struct xenfb_update {
45 uint8_t type; /* XENFB_TYPE_UPDATE */
46 int32_t x; /* source x */
47 int32_t y; /* source y */
48 int32_t width; /* rect width */
49 int32_t height; /* rect height */
50};
51
52#define XENFB_OUT_EVENT_SIZE 40
53
54union xenfb_out_event {
55 uint8_t type;
56 struct xenfb_update update;
57 char pad[XENFB_OUT_EVENT_SIZE];
58};
59
60/* In events (backend -> frontend) */
61
62/*
63 * Frontends should ignore unknown in events.
64 * No in events currently defined.
65 */
66
67#define XENFB_IN_EVENT_SIZE 40
68
69union xenfb_in_event {
70 uint8_t type;
71 char pad[XENFB_IN_EVENT_SIZE];
72};
73
74/* shared page */
75
76#define XENFB_IN_RING_SIZE 1024
77#define XENFB_IN_RING_LEN (XENFB_IN_RING_SIZE / XENFB_IN_EVENT_SIZE)
78#define XENFB_IN_RING_OFFS 1024
79#define XENFB_IN_RING(page) \
80 ((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS))
81#define XENFB_IN_RING_REF(page, idx) \
82 (XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN])
83
84#define XENFB_OUT_RING_SIZE 2048
85#define XENFB_OUT_RING_LEN (XENFB_OUT_RING_SIZE / XENFB_OUT_EVENT_SIZE)
86#define XENFB_OUT_RING_OFFS (XENFB_IN_RING_OFFS + XENFB_IN_RING_SIZE)
87#define XENFB_OUT_RING(page) \
88 ((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS))
89#define XENFB_OUT_RING_REF(page, idx) \
90 (XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN])
91
92struct xenfb_page {
93 uint32_t in_cons, in_prod;
94 uint32_t out_cons, out_prod;
95
96 int32_t width; /* width of the framebuffer (in pixels) */
97 int32_t height; /* height of the framebuffer (in pixels) */
98 uint32_t line_length; /* length of a row of pixels (in bytes) */
99 uint32_t mem_length; /* length of the framebuffer (in bytes) */
100 uint8_t depth; /* depth of a pixel (in bits) */
101
102 /*
103 * Framebuffer page directory
104 *
105 * Each directory page holds PAGE_SIZE / sizeof(*pd)
106 * framebuffer pages, and can thus map up to PAGE_SIZE *
107 * PAGE_SIZE / sizeof(*pd) bytes. With PAGE_SIZE == 4096 and
108 * sizeof(unsigned long) == 4, that's 4 Megs. Two directory
109 * pages should be enough for a while.
110 */
111 unsigned long pd[2];
112};
113
114/*
115 * Wart: xenkbd needs to know resolution. Put it here until a better
116 * solution is found, but don't leak it to the backend.
117 */
118#ifdef __KERNEL__
119#define XENFB_WIDTH 800
120#define XENFB_HEIGHT 600
121#define XENFB_DEPTH 32
122#endif
123
124#endif
diff --git a/include/xen/interface/io/kbdif.h b/include/xen/interface/io/kbdif.h
new file mode 100644
index 0000000000..fb97f4284f
--- /dev/null
+++ b/include/xen/interface/io/kbdif.h
@@ -0,0 +1,114 @@
1/*
2 * kbdif.h -- Xen virtual keyboard/mouse
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to
6 * deal in the Software without restriction, including without limitation the
7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8 * sell copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 *
22 * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
23 * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
24 */
25
26#ifndef __XEN_PUBLIC_IO_KBDIF_H__
27#define __XEN_PUBLIC_IO_KBDIF_H__
28
29/* In events (backend -> frontend) */
30
31/*
32 * Frontends should ignore unknown in events.
33 */
34
35/* Pointer movement event */
36#define XENKBD_TYPE_MOTION 1
37/* Event type 2 currently not used */
38/* Key event (includes pointer buttons) */
39#define XENKBD_TYPE_KEY 3
40/*
41 * Pointer position event
42 * Capable backend sets feature-abs-pointer in xenstore.
43 * Frontend requests ot instead of XENKBD_TYPE_MOTION by setting
44 * request-abs-update in xenstore.
45 */
46#define XENKBD_TYPE_POS 4
47
48struct xenkbd_motion {
49 uint8_t type; /* XENKBD_TYPE_MOTION */
50 int32_t rel_x; /* relative X motion */
51 int32_t rel_y; /* relative Y motion */
52};
53
54struct xenkbd_key {
55 uint8_t type; /* XENKBD_TYPE_KEY */
56 uint8_t pressed; /* 1 if pressed; 0 otherwise */
57 uint32_t keycode; /* KEY_* from linux/input.h */
58};
59
60struct xenkbd_position {
61 uint8_t type; /* XENKBD_TYPE_POS */
62 int32_t abs_x; /* absolute X position (in FB pixels) */
63 int32_t abs_y; /* absolute Y position (in FB pixels) */
64};
65
66#define XENKBD_IN_EVENT_SIZE 40
67
68union xenkbd_in_event {
69 uint8_t type;
70 struct xenkbd_motion motion;
71 struct xenkbd_key key;
72 struct xenkbd_position pos;
73 char pad[XENKBD_IN_EVENT_SIZE];
74};
75
76/* Out events (frontend -> backend) */
77
78/*
79 * Out events may be sent only when requested by backend, and receipt
80 * of an unknown out event is an error.
81 * No out events currently defined.
82 */
83
84#define XENKBD_OUT_EVENT_SIZE 40
85
86union xenkbd_out_event {
87 uint8_t type;
88 char pad[XENKBD_OUT_EVENT_SIZE];
89};
90
91/* shared page */
92
93#define XENKBD_IN_RING_SIZE 2048
94#define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
95#define XENKBD_IN_RING_OFFS 1024
96#define XENKBD_IN_RING(page) \
97 ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
98#define XENKBD_IN_RING_REF(page, idx) \
99 (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
100
101#define XENKBD_OUT_RING_SIZE 1024
102#define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
103#define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
104#define XENKBD_OUT_RING(page) \
105 ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
106#define XENKBD_OUT_RING_REF(page, idx) \
107 (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
108
109struct xenkbd_page {
110 uint32_t in_cons, in_prod;
111 uint32_t out_cons, out_prod;
112};
113
114#endif
generated by cgit v1.2.2 (git 2.25.0) at 2026-05-27 17:33:41 -0400