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![Torben Hohn](/assets/img/avatar_default.png)
The -rt patches change the console_semaphore to console_mutex. As a result, a quite large chunk of the patches changes all acquire/release_console_sem() to acquire/release_console_mutex() This commit makes things use more neutral function names which dont make implications about the underlying lock. The only real change is the return value of console_trylock which is inverted from try_acquire_console_sem() This patch also paves the way to switching console_sem from a semaphore to a mutex. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: make console_trylock return 1 on success, per Geert] Signed-off-by: Torben Hohn <torbenh@gmx.de> Cc: Thomas Gleixner <tglx@tglx.de> Cc: Greg KH <gregkh@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
712 lines
17 KiB
C
712 lines
17 KiB
C
/*
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* Xen para-virtual frame buffer device
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*
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* Copyright (C) 2005-2006 Anthony Liguori <aliguori@us.ibm.com>
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* Copyright (C) 2006-2008 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
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*
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* Based on linux/drivers/video/q40fb.c
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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/*
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* TODO:
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*
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* Switch to grant tables when they become capable of dealing with the
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* frame buffer.
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*/
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#include <linux/console.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/fb.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/mm.h>
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#include <asm/xen/hypervisor.h>
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#include <xen/xen.h>
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#include <xen/events.h>
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#include <xen/page.h>
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#include <xen/interface/io/fbif.h>
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#include <xen/interface/io/protocols.h>
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#include <xen/xenbus.h>
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struct xenfb_info {
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unsigned char *fb;
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struct fb_info *fb_info;
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int x1, y1, x2, y2; /* dirty rectangle,
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protected by dirty_lock */
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spinlock_t dirty_lock;
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int nr_pages;
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int irq;
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struct xenfb_page *page;
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unsigned long *mfns;
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int update_wanted; /* XENFB_TYPE_UPDATE wanted */
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int feature_resize; /* XENFB_TYPE_RESIZE ok */
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struct xenfb_resize resize; /* protected by resize_lock */
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int resize_dpy; /* ditto */
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spinlock_t resize_lock;
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struct xenbus_device *xbdev;
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};
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#define XENFB_DEFAULT_FB_LEN (XENFB_WIDTH * XENFB_HEIGHT * XENFB_DEPTH / 8)
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enum { KPARAM_MEM, KPARAM_WIDTH, KPARAM_HEIGHT, KPARAM_CNT };
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static int video[KPARAM_CNT] = { 2, XENFB_WIDTH, XENFB_HEIGHT };
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module_param_array(video, int, NULL, 0);
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MODULE_PARM_DESC(video,
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"Video memory size in MB, width, height in pixels (default 2,800,600)");
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static void xenfb_make_preferred_console(void);
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static int xenfb_remove(struct xenbus_device *);
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static void xenfb_init_shared_page(struct xenfb_info *, struct fb_info *);
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static int xenfb_connect_backend(struct xenbus_device *, struct xenfb_info *);
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static void xenfb_disconnect_backend(struct xenfb_info *);
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static void xenfb_send_event(struct xenfb_info *info,
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union xenfb_out_event *event)
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{
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u32 prod;
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prod = info->page->out_prod;
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/* caller ensures !xenfb_queue_full() */
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mb(); /* ensure ring space available */
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XENFB_OUT_RING_REF(info->page, prod) = *event;
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wmb(); /* ensure ring contents visible */
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info->page->out_prod = prod + 1;
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notify_remote_via_irq(info->irq);
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}
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static void xenfb_do_update(struct xenfb_info *info,
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int x, int y, int w, int h)
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{
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union xenfb_out_event event;
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memset(&event, 0, sizeof(event));
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event.type = XENFB_TYPE_UPDATE;
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event.update.x = x;
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event.update.y = y;
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event.update.width = w;
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event.update.height = h;
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/* caller ensures !xenfb_queue_full() */
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xenfb_send_event(info, &event);
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}
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static void xenfb_do_resize(struct xenfb_info *info)
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{
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union xenfb_out_event event;
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memset(&event, 0, sizeof(event));
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event.resize = info->resize;
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/* caller ensures !xenfb_queue_full() */
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xenfb_send_event(info, &event);
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}
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static int xenfb_queue_full(struct xenfb_info *info)
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{
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u32 cons, prod;
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prod = info->page->out_prod;
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cons = info->page->out_cons;
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return prod - cons == XENFB_OUT_RING_LEN;
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}
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static void xenfb_handle_resize_dpy(struct xenfb_info *info)
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{
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unsigned long flags;
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spin_lock_irqsave(&info->resize_lock, flags);
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if (info->resize_dpy) {
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if (!xenfb_queue_full(info)) {
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info->resize_dpy = 0;
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xenfb_do_resize(info);
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}
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}
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spin_unlock_irqrestore(&info->resize_lock, flags);
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}
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static void xenfb_refresh(struct xenfb_info *info,
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int x1, int y1, int w, int h)
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{
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unsigned long flags;
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int x2 = x1 + w - 1;
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int y2 = y1 + h - 1;
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xenfb_handle_resize_dpy(info);
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if (!info->update_wanted)
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return;
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spin_lock_irqsave(&info->dirty_lock, flags);
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/* Combine with dirty rectangle: */
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if (info->y1 < y1)
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y1 = info->y1;
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if (info->y2 > y2)
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y2 = info->y2;
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if (info->x1 < x1)
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x1 = info->x1;
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if (info->x2 > x2)
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x2 = info->x2;
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if (xenfb_queue_full(info)) {
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/* Can't send right now, stash it in the dirty rectangle */
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info->x1 = x1;
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info->x2 = x2;
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info->y1 = y1;
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info->y2 = y2;
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spin_unlock_irqrestore(&info->dirty_lock, flags);
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return;
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}
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/* Clear dirty rectangle: */
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info->x1 = info->y1 = INT_MAX;
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info->x2 = info->y2 = 0;
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spin_unlock_irqrestore(&info->dirty_lock, flags);
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if (x1 <= x2 && y1 <= y2)
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xenfb_do_update(info, x1, y1, x2 - x1 + 1, y2 - y1 + 1);
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}
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static void xenfb_deferred_io(struct fb_info *fb_info,
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struct list_head *pagelist)
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{
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struct xenfb_info *info = fb_info->par;
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struct page *page;
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unsigned long beg, end;
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int y1, y2, miny, maxy;
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miny = INT_MAX;
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maxy = 0;
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list_for_each_entry(page, pagelist, lru) {
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beg = page->index << PAGE_SHIFT;
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end = beg + PAGE_SIZE - 1;
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y1 = beg / fb_info->fix.line_length;
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y2 = end / fb_info->fix.line_length;
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if (y2 >= fb_info->var.yres)
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y2 = fb_info->var.yres - 1;
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if (miny > y1)
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miny = y1;
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if (maxy < y2)
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maxy = y2;
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}
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xenfb_refresh(info, 0, miny, fb_info->var.xres, maxy - miny + 1);
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}
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static struct fb_deferred_io xenfb_defio = {
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.delay = HZ / 20,
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.deferred_io = xenfb_deferred_io,
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};
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static int xenfb_setcolreg(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp,
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struct fb_info *info)
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{
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u32 v;
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if (regno > info->cmap.len)
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return 1;
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#define CNVT_TOHW(val, width) ((((val)<<(width))+0x7FFF-(val))>>16)
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red = CNVT_TOHW(red, info->var.red.length);
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green = CNVT_TOHW(green, info->var.green.length);
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blue = CNVT_TOHW(blue, info->var.blue.length);
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transp = CNVT_TOHW(transp, info->var.transp.length);
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#undef CNVT_TOHW
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v = (red << info->var.red.offset) |
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(green << info->var.green.offset) |
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(blue << info->var.blue.offset);
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switch (info->var.bits_per_pixel) {
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case 16:
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case 24:
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case 32:
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((u32 *)info->pseudo_palette)[regno] = v;
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break;
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}
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return 0;
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}
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static void xenfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
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{
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struct xenfb_info *info = p->par;
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sys_fillrect(p, rect);
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xenfb_refresh(info, rect->dx, rect->dy, rect->width, rect->height);
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}
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static void xenfb_imageblit(struct fb_info *p, const struct fb_image *image)
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{
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struct xenfb_info *info = p->par;
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sys_imageblit(p, image);
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xenfb_refresh(info, image->dx, image->dy, image->width, image->height);
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}
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static void xenfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
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{
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struct xenfb_info *info = p->par;
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sys_copyarea(p, area);
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xenfb_refresh(info, area->dx, area->dy, area->width, area->height);
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}
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static ssize_t xenfb_write(struct fb_info *p, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct xenfb_info *info = p->par;
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ssize_t res;
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res = fb_sys_write(p, buf, count, ppos);
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xenfb_refresh(info, 0, 0, info->page->width, info->page->height);
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return res;
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}
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static int
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xenfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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struct xenfb_info *xenfb_info;
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int required_mem_len;
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xenfb_info = info->par;
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if (!xenfb_info->feature_resize) {
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if (var->xres == video[KPARAM_WIDTH] &&
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var->yres == video[KPARAM_HEIGHT] &&
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var->bits_per_pixel == xenfb_info->page->depth) {
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return 0;
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}
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return -EINVAL;
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}
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/* Can't resize past initial width and height */
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if (var->xres > video[KPARAM_WIDTH] || var->yres > video[KPARAM_HEIGHT])
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return -EINVAL;
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required_mem_len = var->xres * var->yres * xenfb_info->page->depth / 8;
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if (var->bits_per_pixel == xenfb_info->page->depth &&
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var->xres <= info->fix.line_length / (XENFB_DEPTH / 8) &&
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required_mem_len <= info->fix.smem_len) {
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var->xres_virtual = var->xres;
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var->yres_virtual = var->yres;
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return 0;
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}
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return -EINVAL;
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}
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static int xenfb_set_par(struct fb_info *info)
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{
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struct xenfb_info *xenfb_info;
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unsigned long flags;
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xenfb_info = info->par;
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spin_lock_irqsave(&xenfb_info->resize_lock, flags);
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xenfb_info->resize.type = XENFB_TYPE_RESIZE;
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xenfb_info->resize.width = info->var.xres;
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xenfb_info->resize.height = info->var.yres;
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xenfb_info->resize.stride = info->fix.line_length;
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xenfb_info->resize.depth = info->var.bits_per_pixel;
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xenfb_info->resize.offset = 0;
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xenfb_info->resize_dpy = 1;
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spin_unlock_irqrestore(&xenfb_info->resize_lock, flags);
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return 0;
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}
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static struct fb_ops xenfb_fb_ops = {
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.owner = THIS_MODULE,
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.fb_read = fb_sys_read,
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.fb_write = xenfb_write,
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.fb_setcolreg = xenfb_setcolreg,
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.fb_fillrect = xenfb_fillrect,
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.fb_copyarea = xenfb_copyarea,
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.fb_imageblit = xenfb_imageblit,
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.fb_check_var = xenfb_check_var,
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.fb_set_par = xenfb_set_par,
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};
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static irqreturn_t xenfb_event_handler(int rq, void *dev_id)
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{
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/*
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* No in events recognized, simply ignore them all.
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* If you need to recognize some, see xen-kbdfront's
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* input_handler() for how to do that.
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*/
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struct xenfb_info *info = dev_id;
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struct xenfb_page *page = info->page;
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if (page->in_cons != page->in_prod) {
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info->page->in_cons = info->page->in_prod;
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notify_remote_via_irq(info->irq);
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}
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/* Flush dirty rectangle: */
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xenfb_refresh(info, INT_MAX, INT_MAX, -INT_MAX, -INT_MAX);
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return IRQ_HANDLED;
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}
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static int __devinit xenfb_probe(struct xenbus_device *dev,
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const struct xenbus_device_id *id)
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{
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struct xenfb_info *info;
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struct fb_info *fb_info;
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int fb_size;
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int val;
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int ret;
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info = kzalloc(sizeof(*info), GFP_KERNEL);
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if (info == NULL) {
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xenbus_dev_fatal(dev, -ENOMEM, "allocating info structure");
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return -ENOMEM;
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}
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/* Limit kernel param videoram amount to what is in xenstore */
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if (xenbus_scanf(XBT_NIL, dev->otherend, "videoram", "%d", &val) == 1) {
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if (val < video[KPARAM_MEM])
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video[KPARAM_MEM] = val;
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}
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/* If requested res does not fit in available memory, use default */
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fb_size = video[KPARAM_MEM] * 1024 * 1024;
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if (video[KPARAM_WIDTH] * video[KPARAM_HEIGHT] * XENFB_DEPTH / 8
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> fb_size) {
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video[KPARAM_WIDTH] = XENFB_WIDTH;
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video[KPARAM_HEIGHT] = XENFB_HEIGHT;
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fb_size = XENFB_DEFAULT_FB_LEN;
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}
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dev_set_drvdata(&dev->dev, info);
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info->xbdev = dev;
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info->irq = -1;
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info->x1 = info->y1 = INT_MAX;
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spin_lock_init(&info->dirty_lock);
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spin_lock_init(&info->resize_lock);
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info->fb = vmalloc(fb_size);
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if (info->fb == NULL)
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goto error_nomem;
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memset(info->fb, 0, fb_size);
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info->nr_pages = (fb_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
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info->mfns = vmalloc(sizeof(unsigned long) * info->nr_pages);
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if (!info->mfns)
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goto error_nomem;
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/* set up shared page */
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info->page = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
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if (!info->page)
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goto error_nomem;
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/* abusing framebuffer_alloc() to allocate pseudo_palette */
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fb_info = framebuffer_alloc(sizeof(u32) * 256, NULL);
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if (fb_info == NULL)
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goto error_nomem;
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/* complete the abuse: */
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fb_info->pseudo_palette = fb_info->par;
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fb_info->par = info;
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fb_info->screen_base = info->fb;
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fb_info->fbops = &xenfb_fb_ops;
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fb_info->var.xres_virtual = fb_info->var.xres = video[KPARAM_WIDTH];
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fb_info->var.yres_virtual = fb_info->var.yres = video[KPARAM_HEIGHT];
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fb_info->var.bits_per_pixel = XENFB_DEPTH;
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fb_info->var.red = (struct fb_bitfield){16, 8, 0};
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fb_info->var.green = (struct fb_bitfield){8, 8, 0};
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fb_info->var.blue = (struct fb_bitfield){0, 8, 0};
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fb_info->var.activate = FB_ACTIVATE_NOW;
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fb_info->var.height = -1;
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fb_info->var.width = -1;
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fb_info->var.vmode = FB_VMODE_NONINTERLACED;
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fb_info->fix.visual = FB_VISUAL_TRUECOLOR;
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fb_info->fix.line_length = fb_info->var.xres * XENFB_DEPTH / 8;
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fb_info->fix.smem_start = 0;
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fb_info->fix.smem_len = fb_size;
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strcpy(fb_info->fix.id, "xen");
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fb_info->fix.type = FB_TYPE_PACKED_PIXELS;
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fb_info->fix.accel = FB_ACCEL_NONE;
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fb_info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB;
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ret = fb_alloc_cmap(&fb_info->cmap, 256, 0);
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if (ret < 0) {
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framebuffer_release(fb_info);
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xenbus_dev_fatal(dev, ret, "fb_alloc_cmap");
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goto error;
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}
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fb_info->fbdefio = &xenfb_defio;
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fb_deferred_io_init(fb_info);
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xenfb_init_shared_page(info, fb_info);
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ret = xenfb_connect_backend(dev, info);
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if (ret < 0)
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goto error;
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ret = register_framebuffer(fb_info);
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if (ret) {
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fb_deferred_io_cleanup(fb_info);
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fb_dealloc_cmap(&fb_info->cmap);
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framebuffer_release(fb_info);
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xenbus_dev_fatal(dev, ret, "register_framebuffer");
|
|
goto error;
|
|
}
|
|
info->fb_info = fb_info;
|
|
|
|
xenfb_make_preferred_console();
|
|
return 0;
|
|
|
|
error_nomem:
|
|
ret = -ENOMEM;
|
|
xenbus_dev_fatal(dev, ret, "allocating device memory");
|
|
error:
|
|
xenfb_remove(dev);
|
|
return ret;
|
|
}
|
|
|
|
static __devinit void
|
|
xenfb_make_preferred_console(void)
|
|
{
|
|
struct console *c;
|
|
|
|
if (console_set_on_cmdline)
|
|
return;
|
|
|
|
console_lock();
|
|
for_each_console(c) {
|
|
if (!strcmp(c->name, "tty") && c->index == 0)
|
|
break;
|
|
}
|
|
console_unlock();
|
|
if (c) {
|
|
unregister_console(c);
|
|
c->flags |= CON_CONSDEV;
|
|
c->flags &= ~CON_PRINTBUFFER; /* don't print again */
|
|
register_console(c);
|
|
}
|
|
}
|
|
|
|
static int xenfb_resume(struct xenbus_device *dev)
|
|
{
|
|
struct xenfb_info *info = dev_get_drvdata(&dev->dev);
|
|
|
|
xenfb_disconnect_backend(info);
|
|
xenfb_init_shared_page(info, info->fb_info);
|
|
return xenfb_connect_backend(dev, info);
|
|
}
|
|
|
|
static int xenfb_remove(struct xenbus_device *dev)
|
|
{
|
|
struct xenfb_info *info = dev_get_drvdata(&dev->dev);
|
|
|
|
xenfb_disconnect_backend(info);
|
|
if (info->fb_info) {
|
|
fb_deferred_io_cleanup(info->fb_info);
|
|
unregister_framebuffer(info->fb_info);
|
|
fb_dealloc_cmap(&info->fb_info->cmap);
|
|
framebuffer_release(info->fb_info);
|
|
}
|
|
free_page((unsigned long)info->page);
|
|
vfree(info->mfns);
|
|
vfree(info->fb);
|
|
kfree(info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned long vmalloc_to_mfn(void *address)
|
|
{
|
|
return pfn_to_mfn(vmalloc_to_pfn(address));
|
|
}
|
|
|
|
static void xenfb_init_shared_page(struct xenfb_info *info,
|
|
struct fb_info *fb_info)
|
|
{
|
|
int i;
|
|
int epd = PAGE_SIZE / sizeof(info->mfns[0]);
|
|
|
|
for (i = 0; i < info->nr_pages; i++)
|
|
info->mfns[i] = vmalloc_to_mfn(info->fb + i * PAGE_SIZE);
|
|
|
|
for (i = 0; i * epd < info->nr_pages; i++)
|
|
info->page->pd[i] = vmalloc_to_mfn(&info->mfns[i * epd]);
|
|
|
|
info->page->width = fb_info->var.xres;
|
|
info->page->height = fb_info->var.yres;
|
|
info->page->depth = fb_info->var.bits_per_pixel;
|
|
info->page->line_length = fb_info->fix.line_length;
|
|
info->page->mem_length = fb_info->fix.smem_len;
|
|
info->page->in_cons = info->page->in_prod = 0;
|
|
info->page->out_cons = info->page->out_prod = 0;
|
|
}
|
|
|
|
static int xenfb_connect_backend(struct xenbus_device *dev,
|
|
struct xenfb_info *info)
|
|
{
|
|
int ret, evtchn, irq;
|
|
struct xenbus_transaction xbt;
|
|
|
|
ret = xenbus_alloc_evtchn(dev, &evtchn);
|
|
if (ret)
|
|
return ret;
|
|
irq = bind_evtchn_to_irqhandler(evtchn, xenfb_event_handler,
|
|
0, dev->devicetype, info);
|
|
if (irq < 0) {
|
|
xenbus_free_evtchn(dev, evtchn);
|
|
xenbus_dev_fatal(dev, ret, "bind_evtchn_to_irqhandler");
|
|
return irq;
|
|
}
|
|
again:
|
|
ret = xenbus_transaction_start(&xbt);
|
|
if (ret) {
|
|
xenbus_dev_fatal(dev, ret, "starting transaction");
|
|
goto unbind_irq;
|
|
}
|
|
ret = xenbus_printf(xbt, dev->nodename, "page-ref", "%lu",
|
|
virt_to_mfn(info->page));
|
|
if (ret)
|
|
goto error_xenbus;
|
|
ret = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
|
|
evtchn);
|
|
if (ret)
|
|
goto error_xenbus;
|
|
ret = xenbus_printf(xbt, dev->nodename, "protocol", "%s",
|
|
XEN_IO_PROTO_ABI_NATIVE);
|
|
if (ret)
|
|
goto error_xenbus;
|
|
ret = xenbus_printf(xbt, dev->nodename, "feature-update", "1");
|
|
if (ret)
|
|
goto error_xenbus;
|
|
ret = xenbus_transaction_end(xbt, 0);
|
|
if (ret) {
|
|
if (ret == -EAGAIN)
|
|
goto again;
|
|
xenbus_dev_fatal(dev, ret, "completing transaction");
|
|
goto unbind_irq;
|
|
}
|
|
|
|
xenbus_switch_state(dev, XenbusStateInitialised);
|
|
info->irq = irq;
|
|
return 0;
|
|
|
|
error_xenbus:
|
|
xenbus_transaction_end(xbt, 1);
|
|
xenbus_dev_fatal(dev, ret, "writing xenstore");
|
|
unbind_irq:
|
|
unbind_from_irqhandler(irq, info);
|
|
return ret;
|
|
}
|
|
|
|
static void xenfb_disconnect_backend(struct xenfb_info *info)
|
|
{
|
|
/* Prevent xenfb refresh */
|
|
info->update_wanted = 0;
|
|
if (info->irq >= 0)
|
|
unbind_from_irqhandler(info->irq, info);
|
|
info->irq = -1;
|
|
}
|
|
|
|
static void xenfb_backend_changed(struct xenbus_device *dev,
|
|
enum xenbus_state backend_state)
|
|
{
|
|
struct xenfb_info *info = dev_get_drvdata(&dev->dev);
|
|
int val;
|
|
|
|
switch (backend_state) {
|
|
case XenbusStateInitialising:
|
|
case XenbusStateInitialised:
|
|
case XenbusStateReconfiguring:
|
|
case XenbusStateReconfigured:
|
|
case XenbusStateUnknown:
|
|
case XenbusStateClosed:
|
|
break;
|
|
|
|
case XenbusStateInitWait:
|
|
InitWait:
|
|
xenbus_switch_state(dev, XenbusStateConnected);
|
|
break;
|
|
|
|
case XenbusStateConnected:
|
|
/*
|
|
* Work around xenbus race condition: If backend goes
|
|
* through InitWait to Connected fast enough, we can
|
|
* get Connected twice here.
|
|
*/
|
|
if (dev->state != XenbusStateConnected)
|
|
goto InitWait; /* no InitWait seen yet, fudge it */
|
|
|
|
if (xenbus_scanf(XBT_NIL, info->xbdev->otherend,
|
|
"request-update", "%d", &val) < 0)
|
|
val = 0;
|
|
if (val)
|
|
info->update_wanted = 1;
|
|
|
|
if (xenbus_scanf(XBT_NIL, dev->otherend,
|
|
"feature-resize", "%d", &val) < 0)
|
|
val = 0;
|
|
info->feature_resize = val;
|
|
break;
|
|
|
|
case XenbusStateClosing:
|
|
xenbus_frontend_closed(dev);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct xenbus_device_id xenfb_ids[] = {
|
|
{ "vfb" },
|
|
{ "" }
|
|
};
|
|
|
|
static struct xenbus_driver xenfb_driver = {
|
|
.name = "vfb",
|
|
.owner = THIS_MODULE,
|
|
.ids = xenfb_ids,
|
|
.probe = xenfb_probe,
|
|
.remove = xenfb_remove,
|
|
.resume = xenfb_resume,
|
|
.otherend_changed = xenfb_backend_changed,
|
|
};
|
|
|
|
static int __init xenfb_init(void)
|
|
{
|
|
if (!xen_pv_domain())
|
|
return -ENODEV;
|
|
|
|
/* Nothing to do if running in dom0. */
|
|
if (xen_initial_domain())
|
|
return -ENODEV;
|
|
|
|
return xenbus_register_frontend(&xenfb_driver);
|
|
}
|
|
|
|
static void __exit xenfb_cleanup(void)
|
|
{
|
|
xenbus_unregister_driver(&xenfb_driver);
|
|
}
|
|
|
|
module_init(xenfb_init);
|
|
module_exit(xenfb_cleanup);
|
|
|
|
MODULE_DESCRIPTION("Xen virtual framebuffer device frontend");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("xen:vfb");
|