This patch adds a frsamebuffer (and kbd+mouse) backend driver. It
it based on current xen-unstable code. It has been changed to make
use of the common backend driver code. It also has been changed to
compile with xen headers older than unstable (aka son-to-be 3.3).
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
Makefile.target | 2 +-
hw/xen_backend.h | 4 +
hw/xen_machine_pv.c | 5 +
hw/xenfb.c | 977 +++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 987 insertions(+), 1 deletions(-)
create mode 100644 hw/xenfb.c
diff --git a/Makefile.target b/Makefile.target
index 50f1dca..7606a20 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -631,7 +631,7 @@ endif
# xen backend driver support
XEN_OBJS := xen_machine_pv.o xen_backend.o
-XEN_OBJS += xen_console.o
+XEN_OBJS += xen_console.o xenfb.o
ifeq ($(CONFIG_XEN), yes)
OBJS += $(XEN_OBJS)
LIBS += $(XEN_LIBS)
diff --git a/hw/xen_backend.h b/hw/xen_backend.h
index 4744713..ceeb3aa 100644
--- a/hw/xen_backend.h
+++ b/hw/xen_backend.h
@@ -85,5 +85,9 @@ void xen_be_printf(struct XenDevice *xendev, int msg_level,
const char *fmt, ...
/* actual backend drivers */
extern struct XenDevOps xen_console_ops; /* xen_console.c */
+extern struct XenDevOps xen_kbdmouse_ops; /* xen_framebuffer.c */
+extern struct XenDevOps xen_framebuffer_ops; /* xen_framebuffer.c */
+
+void xen_set_display(int domid, DisplayState *ds);
#endif /* QEMU_HW_XEN_BACKEND_H */
diff --git a/hw/xen_machine_pv.c b/hw/xen_machine_pv.c
index fca2e09..38e7335 100644
--- a/hw/xen_machine_pv.c
+++ b/hw/xen_machine_pv.c
@@ -65,6 +65,11 @@ static int xen_init_pv(DisplayState *ds)
/* xenbus backend drivers */
xen_be_register("console", &xen_console_ops);
+ xen_be_register("vkbd", &xen_kbdmouse_ops);
+ xen_be_register("vfb", &xen_framebuffer_ops);
+
+ /* setup framebuffer */
+ xen_set_display(xen_domid, ds);
return 0;
}
diff --git a/hw/xenfb.c b/hw/xenfb.c
new file mode 100644
index 0000000..1b26b95
--- /dev/null
+++ b/hw/xenfb.c
@@ -0,0 +1,977 @@
+/*
+ * xen paravirt framebuffer backend
+ *
+ * Copyright IBM, Corp. 2005-2006
+ * Copyright Red Hat, Inc. 2006-2008
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@xxxxxxxxxx>,
+ * Markus Armbruster <armbru@xxxxxxxxxx>,
+ * Daniel P. Berrange <berrange@xxxxxxxxxx>,
+ * Pat Campbell <plc@xxxxxxxxxx>,
+ * Gerd Hoffmann <kraxel@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; under version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+#include <xs.h>
+#include <xenctrl.h>
+#include <xen/event_channel.h>
+#include <xen/io/xenbus.h>
+#include <xen/io/fbif.h>
+#include <xen/io/kbdif.h>
+#include <xen/io/protocols.h>
+
+#include "hw.h"
+#include "sysemu.h"
+#include "console.h"
+#include "qemu-char.h"
+#include "xen_backend.h"
+
+#ifndef BTN_LEFT
+#define BTN_LEFT 0x110 /* from <linux/input.h> */
+#endif
+
+/* -------------------------------------------------------------------- */
+
+struct common {
+ struct XenDevice xendev; /* must be first */
+ void *page;
+ DisplayState *ds;
+};
+
+struct XenInput {
+ struct common c;
+ int abs_pointer_wanted; /* Whether guest supports absolute pointer */
+ int button_state; /* Last seen pointer button state */
+ int extended;
+ QEMUPutMouseEntry *qmouse;
+};
+
+#define UP_QUEUE 8
+
+struct XenFB {
+ struct common c;
+ size_t fb_len;
+ int row_stride;
+ int depth;
+ int width;
+ int height;
+ int offset;
+ void *pixels;
+ int fbpages;
+ int feature_update;
+ int refresh_period;
+ int bug_trigger;
+ int have_console;
+
+ struct {
+ int x,y,w,h;
+ } up_rects[UP_QUEUE];
+ int up_count;
+ int up_fullscreen;
+};
+
+/* -------------------------------------------------------------------- */
+
+static int common_bind(struct common *c)
+{
+ int mfn;
+
+ if (-1 == xenstore_read_fe_int(&c->xendev, "page-ref", &mfn))
+ return -1;
+ if (-1 == xenstore_read_fe_int(&c->xendev, "event-channel",
&c->xendev.remote_port))
+ return -1;
+
+ xen_be_bind_evtchn(&c->xendev);
+ xen_be_printf(&c->xendev, 1, "ring mfn %d, remote-port %d, local-port
%d\n",
+ mfn, c->xendev.remote_port, c->xendev.local_port);
+
+ c->page = xc_map_foreign_range(xen_xc, c->xendev.dom,
+ XC_PAGE_SIZE,
+ PROT_READ | PROT_WRITE, mfn);
+ if (NULL == c->page)
+ return -1;
+ return 0;
+}
+
+static void common_unbind(struct common *c)
+{
+ if (c->page) {
+ munmap(c->page, XC_PAGE_SIZE);
+ c->page = NULL;
+ }
+ xen_be_unbind_evtchn(&c->xendev);
+}
+
+/* -------------------------------------------------------------------- */
+
+#if 0
+/*
+ * These two tables are not needed any more, but left in here
+ * intentionally as documentation, to show how scancode2linux[]
+ * was generated.
+ *
+ * Tables to map from scancode to Linux input layer keycode.
+ * Scancodes are hardware-specific. These maps assumes a
+ * standard AT or PS/2 keyboard which is what QEMU feeds us.
+ */
+static const unsigned char atkbd_set2_keycode[512] = {
+
+ 0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117,
+ 0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0,
+ 0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183,
+ 0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185,
+ 0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0,
+ 0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85,
+ 0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0,
+ 82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
+
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125,
+ 173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127,
+ 159, 0,115, 0,164, 0, 0,116,158, 0,150,166, 0, 0, 0,142,
+ 157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0,
+ 226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112,
+ 110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0,
+
+};
+
+static const unsigned char atkbd_unxlate_table[128] = {
+
+ 0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
+ 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
+ 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
+ 50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
+ 11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
+ 114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
+ 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
+ 19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
+
+};
+#endif
+
+/*
+ * for (i = 0; i < 128; i++) {
+ * scancode2linux[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]];
+ * scancode2linux[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i] |
0x80];
+ * }
+ */
+static const unsigned char scancode2linux[512] = {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
+ 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
+ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
+ 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
+ 80, 81, 82, 83, 99, 0, 86, 87, 88,117, 0, 0, 95,183,184,185,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 93, 0, 0, 89, 0, 0, 85, 91, 90, 92, 0, 94, 0,124,121, 0,
+
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 165, 0, 0, 0, 0, 0, 0, 0, 0,163, 0, 0, 96, 97, 0, 0,
+ 113,140,164, 0,166, 0, 0, 0, 0, 0,255, 0, 0, 0,114, 0,
+ 115, 0,150, 0, 0, 98,255, 99,100, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0,119,119,102,103,104, 0,105,112,106,118,107,
+ 108,109,110,111, 0, 0, 0, 0, 0, 0, 0,125,126,127,116,142,
+ 0, 0, 0,143, 0,217,156,173,128,159,158,157,155,226, 0,112,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+
+/* Send an event to the keyboard frontend driver */
+static int xenfb_kbd_event(struct XenInput *xenfb,
+ union xenkbd_in_event *event)
+{
+ struct xenkbd_page *page = xenfb->c.page;
+ uint32_t prod;
+
+ if (xenfb->c.xendev.be_state != XenbusStateConnected)
+ return 0;
+ if (!page)
+ return 0;
+
+ prod = page->in_prod;
+ if (prod - page->in_cons == XENKBD_IN_RING_LEN) {
+ errno = EAGAIN;
+ return -1;
+ }
+
+ xen_mb(); /* ensure ring space available */
+ XENKBD_IN_RING_REF(page, prod) = *event;
+ xen_wmb(); /* ensure ring contents visible */
+ page->in_prod = prod + 1;
+ return xen_be_send_notify(&xenfb->c.xendev);
+}
+
+/* Send a keyboard (or mouse button) event */
+static int xenfb_send_key(struct XenInput *xenfb, bool down, int keycode)
+{
+ union xenkbd_in_event event;
+
+ memset(&event, 0, XENKBD_IN_EVENT_SIZE);
+ event.type = XENKBD_TYPE_KEY;
+ event.key.pressed = down ? 1 : 0;
+ event.key.keycode = keycode;
+
+ return xenfb_kbd_event(xenfb, &event);
+}
+
+/* Send a relative mouse movement event */
+static int xenfb_send_motion(struct XenInput *xenfb,
+ int rel_x, int rel_y, int rel_z)
+{
+ union xenkbd_in_event event;
+
+ memset(&event, 0, XENKBD_IN_EVENT_SIZE);
+ event.type = XENKBD_TYPE_MOTION;
+ event.motion.rel_x = rel_x;
+ event.motion.rel_y = rel_y;
+#if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030207
+ event.motion.rel_z = rel_z;
+#endif
+
+ return xenfb_kbd_event(xenfb, &event);
+}
+
+/* Send an absolute mouse movement event */
+static int xenfb_send_position(struct XenInput *xenfb,
+ int abs_x, int abs_y, int z)
+{
+ union xenkbd_in_event event;
+
+ memset(&event, 0, XENKBD_IN_EVENT_SIZE);
+ event.type = XENKBD_TYPE_POS;
+ event.pos.abs_x = abs_x;
+ event.pos.abs_y = abs_y;
+#if __XEN_LATEST_INTERFACE_VERSION__ == 0x00030207
+ event.pos.abs_z = z;
+#endif
+#if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030208
+ event.pos.rel_z = z;
+#endif
+
+ return xenfb_kbd_event(xenfb, &event);
+}
+
+/*
+ * Send a key event from the client to the guest OS
+ * QEMU gives us a raw scancode from an AT / PS/2 style keyboard.
+ * We have to turn this into a Linux Input layer keycode.
+ *
+ * Extra complexity from the fact that with extended scancodes
+ * (like those produced by arrow keys) this method gets called
+ * twice, but we only want to send a single event. So we have to
+ * track the '0xe0' scancode state & collapse the extended keys
+ * as needed.
+ *
+ * Wish we could just send scancodes straight to the guest which
+ * already has code for dealing with this...
+ */
+static void xenfb_key_event(void *opaque, int scancode)
+{
+ struct XenInput *xenfb = opaque;
+ int down = 1;
+
+ if (scancode == 0xe0) {
+ xenfb->extended = 1;
+ return;
+ } else if (scancode & 0x80) {
+ scancode &= 0x7f;
+ down = 0;
+ }
+ if (xenfb->extended) {
+ scancode |= 0x80;
+ xenfb->extended = 0;
+ }
+ xenfb_send_key(xenfb, down, scancode2linux[scancode]);
+}
+
+/*
+ * Send a mouse event from the client to the guest OS
+ *
+ * The QEMU mouse can be in either relative, or absolute mode.
+ * Movement is sent separately from button state, which has to
+ * be encoded as virtual key events. We also don't actually get
+ * given any button up/down events, so have to track changes in
+ * the button state.
+ */
+static void xenfb_mouse_event(void *opaque,
+ int dx, int dy, int dz, int button_state)
+{
+ struct XenInput *xenfb = opaque;
+ int i;
+
+ if (xenfb->abs_pointer_wanted)
+ xenfb_send_position(xenfb,
+ dx * (xenfb->c.ds->width - 1) / 0x7fff,
+ dy * (xenfb->c.ds->height - 1) / 0x7fff,
+ dz);
+ else
+ xenfb_send_motion(xenfb, dx, dy, dz);
+
+ for (i = 0 ; i < 8 ; i++) {
+ int lastDown = xenfb->button_state & (1 << i);
+ int down = button_state & (1 << i);
+ if (down == lastDown)
+ continue;
+
+ if (xenfb_send_key(xenfb, down, BTN_LEFT+i) < 0)
+ return;
+ }
+ xenfb->button_state = button_state;
+}
+
+static int input_init(struct XenDevice *xendev)
+{
+ struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
+
+ if (!in->c.ds) {
+ /* xen_set_display() below will set that and trigger us again */
+ xen_be_printf(xendev, 1, "ds not set (yet)\n");
+ return -1;
+ }
+
+ xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
+ return 0;
+}
+
+static int input_connect(struct XenDevice *xendev)
+{
+ struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
+ int rc;
+
+ if (-1 == xenstore_read_fe_int(xendev, "request-abs-pointer",
&in->abs_pointer_wanted))
+ in->abs_pointer_wanted = 0;
+
+ rc = common_bind(&in->c);
+ if (0 != rc)
+ return rc;
+
+ qemu_add_kbd_event_handler(xenfb_key_event, in);
+ in->qmouse = qemu_add_mouse_event_handler(xenfb_mouse_event, in,
+ in->abs_pointer_wanted,
+ "Xen PVFB Mouse");
+ return 0;
+}
+
+static void input_disconnect(struct XenDevice *xendev)
+{
+ struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
+
+ if (in->qmouse) {
+ qemu_remove_mouse_event_handler(in->qmouse);
+ in->qmouse = NULL;
+ }
+ qemu_add_kbd_event_handler(NULL, NULL);
+ common_unbind(&in->c);
+}
+
+static void input_event(struct XenDevice *xendev)
+{
+ struct XenInput *xenfb = container_of(xendev, struct XenInput, c.xendev);
+ struct xenkbd_page *page = xenfb->c.page;
+
+ /* We don't understand any keyboard events, so just ignore them. */
+ if (page->out_prod == page->out_cons)
+ return;
+ page->out_cons = page->out_prod;
+ xen_be_send_notify(&xenfb->c.xendev);
+}
+
+/* -------------------------------------------------------------------- */
+
+static void xenfb_copy_mfns(int mode, int count, unsigned long *dst, void *src)
+{
+ uint32_t *src32 = src;
+ uint64_t *src64 = src;
+ int i;
+
+ for (i = 0; i < count; i++)
+ dst[i] = (mode == 32) ? src32[i] : src64[i];
+}
+
+static int xenfb_map_fb(struct XenFB *xenfb)
+{
+ struct xenfb_page *page = xenfb->c.page;
+ char *protocol = xenfb->c.xendev.protocol;
+ int n_fbdirs;
+ unsigned long *pgmfns = NULL;
+ unsigned long *fbmfns = NULL;
+ void *map, *pd;
+ int mode, ret = -1;
+
+ /* default to native */
+ pd = page->pd;
+ mode = sizeof(unsigned long) * 8;
+
+ if (!protocol) {
+ /*
+ * Undefined protocol, some guesswork needed.
+ *
+ * Old frontends which don't set the protocol use
+ * one page directory only, thus pd[1] must be zero.
+ * pd[1] of the 32bit struct layout and the lower
+ * 32 bits of pd[0] of the 64bit struct layout have
+ * the same location, so we can check that ...
+ */
+ uint32_t *ptr32 = NULL;
+ uint32_t *ptr64 = NULL;
+#if defined(__i386__)
+ ptr32 = (void*)page->pd;
+ ptr64 = ((void*)page->pd) + 4;
+#elif defined(__x86_64__)
+ ptr32 = ((void*)page->pd) - 4;
+ ptr64 = (void*)page->pd;
+#endif
+ if (ptr32) {
+ if (0 == ptr32[1]) {
+ mode = 32;
+ pd = ptr32;
+ } else {
+ mode = 64;
+ pd = ptr64;
+ }
+ }
+#if defined(__x86_64__)
+ } else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_X86_32)) {
+ /* 64bit dom0, 32bit domU */
+ mode = 32;
+ pd = ((void*)page->pd) - 4;
+#elif defined(__i386__)
+ } else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_X86_64)) {
+ /* 32bit dom0, 64bit domU */
+ mode = 64;
+ pd = ((void*)page->pd) + 4;
+#endif
+ }
+
+ if (xenfb->pixels) {
+ munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE);
+ xenfb->pixels = NULL;
+ }
+
+ xenfb->fbpages = (xenfb->fb_len + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
+ n_fbdirs = xenfb->fbpages * mode / 8;
+ n_fbdirs = (n_fbdirs + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
+
+ pgmfns = qemu_mallocz(sizeof(unsigned long) * n_fbdirs);
+ fbmfns = qemu_mallocz(sizeof(unsigned long) * xenfb->fbpages);
+ if (!pgmfns || !fbmfns)
+ goto out;
+
+ xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd);
+ map = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
+ PROT_READ, pgmfns, n_fbdirs);
+ if (map == NULL)
+ goto out;
+ xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map);
+ munmap(map, n_fbdirs * XC_PAGE_SIZE);
+
+ xenfb->pixels = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
+ PROT_READ | PROT_WRITE, fbmfns,
xenfb->fbpages);
+ if (xenfb->pixels == NULL)
+ goto out;
+
+ ret = 0; /* all is fine */
+
+out:
+ qemu_free(pgmfns);
+ qemu_free(fbmfns);
+ return ret;
+}
+
+static int xenfb_configure_fb(struct XenFB *xenfb, size_t fb_len_lim,
+ int width, int height, int depth,
+ size_t fb_len, int offset, int row_stride)
+{
+ size_t mfn_sz = sizeof(*((struct xenfb_page *)0)->pd);
+ size_t pd_len = sizeof(((struct xenfb_page *)0)->pd) / mfn_sz;
+ size_t fb_pages = pd_len * XC_PAGE_SIZE / mfn_sz;
+ size_t fb_len_max = fb_pages * XC_PAGE_SIZE;
+ int max_width, max_height;
+
+ if (fb_len_lim > fb_len_max) {
+ xen_be_printf(&xenfb->c.xendev, 0, "fb size limit %zu exceeds %zu,
corrected\n",
+ fb_len_lim, fb_len_max);
+ fb_len_lim = fb_len_max;
+ }
+ if (fb_len_lim && fb_len > fb_len_lim) {
+ xen_be_printf(&xenfb->c.xendev, 0, "frontend fb size %zu limited to
%zu\n",
+ fb_len, fb_len_lim);
+ fb_len = fb_len_lim;
+ }
+ if (depth != 8 && depth != 16 && depth != 24 && depth != 32) {
+ xen_be_printf(&xenfb->c.xendev, 0, "can't handle frontend fb depth
%d\n",
+ depth);
+ return -1;
+ }
+ if (row_stride <= 0 || row_stride > fb_len) {
+ xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend stride %d\n",
row_stride);
+ return -1;
+ }
+ max_width = row_stride / (depth / 8);
+ if (width < 0 || width > max_width) {
+ xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend width %d limited
to %d\n",
+ width, max_width);
+ width = max_width;
+ }
+ if (offset < 0 || offset >= fb_len) {
+ xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend offset %d (max
%zu)\n",
+ offset, fb_len - 1);
+ return -1;
+ }
+ max_height = (fb_len - offset) / row_stride;
+ if (height < 0 || height > max_height) {
+ xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend height %d limited
to %d\n",
+ height, max_height);
+ height = max_height;
+ }
+ xenfb->fb_len = fb_len;
+ xenfb->row_stride = row_stride;
+ xenfb->depth = depth;
+ xenfb->width = width;
+ xenfb->height = height;
+ xenfb->offset = offset;
+ xen_be_printf(&xenfb->c.xendev, 1, "framebuffer %dx%dx%d offset %d stride
%d\n",
+ width, height, depth, offset, row_stride);
+ return 0;
+}
+
+/* A convenient function for munging pixels between different depths */
+#define BLT(SRC_T,DST_T,RSB,GSB,BSB,RDB,GDB,BDB) \
+ for (line = y ; line < (y+h) ; line++) { \
+ SRC_T *src = (SRC_T *)(xenfb->pixels \
+ + xenfb->offset \
+ + (line * xenfb->row_stride) \
+ + (x * xenfb->depth / 8)); \
+ DST_T *dst = (DST_T *)(xenfb->c.ds->data
\
+ + (line * xenfb->c.ds->linesize) \
+ + (x * xenfb->c.ds->depth / 8)); \
+ int col; \
+ const int RSS = 32 - (RSB + GSB + BSB); \
+ const int GSS = 32 - (GSB + BSB); \
+ const int BSS = 32 - (BSB); \
+ const uint32_t RSM = (~0U) << (32 - RSB); \
+ const uint32_t GSM = (~0U) << (32 - GSB); \
+ const uint32_t BSM = (~0U) << (32 - BSB); \
+ const int RDS = 32 - (RDB + GDB + BDB); \
+ const int GDS = 32 - (GDB + BDB); \
+ const int BDS = 32 - (BDB); \
+ const uint32_t RDM = (~0U) << (32 - RDB); \
+ const uint32_t GDM = (~0U) << (32 - GDB); \
+ const uint32_t BDM = (~0U) << (32 - BDB); \
+ for (col = x ; col < (x+w) ; col++) { \
+ uint32_t spix = *src; \
+ *dst = (((spix << RSS) & RSM & RDM) >> RDS) | \
+ (((spix << GSS) & GSM & GDM) >> GDS) | \
+ (((spix << BSS) & BSM & BDM) >> BDS); \
+ src = (SRC_T *) ((unsigned long) src + xenfb->depth / 8); \
+ dst = (DST_T *) ((unsigned long) dst + xenfb->c.ds->depth / 8); \
+ } \
+ }
+
+
+/* This copies data from the guest framebuffer region, into QEMU's copy
+ * NB. QEMU's copy is stored in the pixel format of a) the local X
+ * server (SDL case) or b) the current VNC client pixel format.
+ * When shifting between colour depths we preserve the MSB.
+ */
+static void xenfb_guest_copy(struct XenFB *xenfb, int x, int y, int w, int h)
+{
+ int line;
+
+ /*
+ * TODO: xen's qemu-dm seems to have some patches to
+ * make the qemu display code avoid unneeded
+ * work.
+ * - Port them over.
+ * - Put ds->shared_buf back into use then.
+ */
+ if (1 /* !xenfb->c.ds->shared_buf */) {
+ if (xenfb->depth == xenfb->c.ds->depth) { /* Perfect match can use fast
path */
+ for (line = y ; line < (y+h) ; line++) {
+ memcpy(xenfb->c.ds->data + (line * xenfb->c.ds->linesize) + (x
* xenfb->c.ds->depth / 8),
+ xenfb->pixels + xenfb->offset + (line *
xenfb->row_stride) + (x * xenfb->depth / 8),
+ w * xenfb->depth / 8);
+ }
+ } else { /* Mismatch requires slow pixel munging */
+ /* 8 bit == r:3 g:3 b:2 */
+ /* 16 bit == r:5 g:6 b:5 */
+ /* 24 bit == r:8 g:8 b:8 */
+ /* 32 bit == r:8 g:8 b:8 (padding:8) */
+ if (xenfb->depth == 8) {
+ if (xenfb->c.ds->depth == 16) {
+ BLT(uint8_t, uint16_t, 3, 3, 2, 5, 6, 5);
+ } else if (xenfb->c.ds->depth == 32) {
+ BLT(uint8_t, uint32_t, 3, 3, 2, 8, 8, 8);
+ }
+ } else if (xenfb->depth == 16) {
+ if (xenfb->c.ds->depth == 8) {
+ BLT(uint16_t, uint8_t, 5, 6, 5, 3, 3, 2);
+ } else if (xenfb->c.ds->depth == 32) {
+ BLT(uint16_t, uint32_t, 5, 6, 5, 8, 8, 8);
+ }
+ } else if (xenfb->depth == 24 || xenfb->depth == 32) {
+ if (xenfb->c.ds->depth == 8) {
+ BLT(uint32_t, uint8_t, 8, 8, 8, 3, 3, 2);
+ } else if (xenfb->c.ds->depth == 16) {
+ BLT(uint32_t, uint16_t, 8, 8, 8, 5, 6, 5);
+ } else if (xenfb->c.ds->depth == 32) {
+ BLT(uint32_t, uint32_t, 8, 8, 8, 8, 8, 8);
+ }
+ }
+ }
+ }
+ dpy_update(xenfb->c.ds, x, y, w, h);
+}
+
+#ifdef XENFB_TYPE_REFRESH_PERIOD
+static int xenfb_queue_full(struct XenFB *xenfb)
+{
+ struct xenfb_page *page = xenfb->c.page;
+ uint32_t cons, prod;
+
+ if (!page)
+ return 1;
+
+ prod = page->in_prod;
+ cons = page->in_cons;
+ return prod - cons == XENFB_IN_RING_LEN;
+}
+
+static void xenfb_send_event(struct XenFB *xenfb, union xenfb_in_event *event)
+{
+ uint32_t prod;
+ struct xenfb_page *page = xenfb->c.page;
+
+ prod = page->in_prod;
+ /* caller ensures !xenfb_queue_full() */
+ xen_mb(); /* ensure ring space available */
+ XENFB_IN_RING_REF(page, prod) = *event;
+ xen_wmb(); /* ensure ring contents visible */
+ page->in_prod = prod + 1;
+
+ xen_be_send_notify(&xenfb->c.xendev);
+}
+
+static void xenfb_send_refresh_period(struct XenFB *xenfb, int period)
+{
+ union xenfb_in_event event;
+
+ memset(&event, 0, sizeof(event));
+ event.type = XENFB_TYPE_REFRESH_PERIOD;
+ event.refresh_period.period = period;
+ xenfb_send_event(xenfb, &event);
+}
+#endif
+
+/*
+ * Periodic update of display.
+ * Also transmit the refresh interval to the frontend.
+ *
+ * Never ever do any qemu display operations
+ * (resize, screen update) outside this function.
+ * Our screen might be inactive. When asked for
+ * an update we know it is active.
+ */
+static void xenfb_update(void *opaque)
+{
+ struct XenFB *xenfb = opaque;
+ int i;
+
+ if (xenfb->feature_update) {
+#ifdef XENFB_TYPE_REFRESH_PERIOD
+ int period;
+
+ if (xenfb_queue_full(xenfb))
+ return;
+
+ if (xenfb->c.ds->idle)
+ period = XENFB_NO_REFRESH;
+ else {
+ period = xenfb->c.ds->gui_timer_interval;
+ if (!period)
+ period = GUI_REFRESH_INTERVAL;
+ }
+
+ if (xenfb->refresh_period != period) {
+ xenfb_send_refresh_period(xenfb, period);
+ xenfb->refresh_period = period;
+ }
+#else
+ ; /* nothing */
+#endif
+ } else {
+ /* we don't get update notifications, thus use the
+ * sledge hammer approach ... */
+ xenfb->up_fullscreen = 1;
+ }
+
+ /* resize if needed */
+ if (xenfb->width != xenfb->c.ds->width || xenfb->height !=
xenfb->c.ds->height) {
+ xen_be_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d\n",
+ xenfb->width, xenfb->height);
+ dpy_resize(xenfb->c.ds, xenfb->width, xenfb->height);
+ xenfb->up_fullscreen = 1;
+ }
+
+ /* run queued updates */
+ if (xenfb->up_fullscreen) {
+ xen_be_printf(&xenfb->c.xendev, 3, "update: fullscreen\n");
+ xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height);
+ } else if (xenfb->up_count) {
+ xen_be_printf(&xenfb->c.xendev, 3, "update: %d rects\n",
xenfb->up_count);
+ for (i = 0; i < xenfb->up_count; i++)
+ xenfb_guest_copy(xenfb,
+ xenfb->up_rects[i].x,
+ xenfb->up_rects[i].y,
+ xenfb->up_rects[i].w,
+ xenfb->up_rects[i].h);
+ } else {
+ xen_be_printf(&xenfb->c.xendev, 3, "update: nothing\n");
+ }
+ xenfb->up_count = 0;
+ xenfb->up_fullscreen = 0;
+}
+
+/* QEMU display state changed, so refresh the framebuffer copy */
+static void xenfb_invalidate(void *opaque)
+{
+ struct XenFB *xenfb = opaque;
+ xenfb->up_fullscreen = 1;
+}
+
+static void xenfb_handle_events(struct XenFB *xenfb)
+{
+ uint32_t prod, cons;
+ struct xenfb_page *page = xenfb->c.page;
+
+ prod = page->out_prod;
+ if (prod == page->out_cons)
+ return;
+ xen_rmb(); /* ensure we see ring contents up to prod */
+ for (cons = page->out_cons; cons != prod; cons++) {
+ union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons);
+ int x, y, w, h;
+
+ switch (event->type) {
+ case XENFB_TYPE_UPDATE:
+ if (xenfb->up_count == UP_QUEUE)
+ xenfb->up_fullscreen = 1;
+ if (xenfb->up_fullscreen)
+ break;
+ x = MAX(event->update.x, 0);
+ y = MAX(event->update.y, 0);
+ w = MIN(event->update.width, xenfb->width - x);
+ h = MIN(event->update.height, xenfb->height - y);
+ if (w < 0 || h < 0) {
+ fprintf(stderr, "xen be: %s: bogus update ignored\n",
+ xenfb->c.xendev.name);
+ break;
+ }
+ if (x != event->update.x || y != event->update.y
+ || w != event->update.width
+ || h != event->update.height) {
+ fprintf(stderr, "xen be: %s: bogus update clipped\n",
+ xenfb->c.xendev.name);
+ }
+ if (w == xenfb->width && h > xenfb->height / 2) {
+ /* scroll detector: updated more than 50% of the lines,
+ * don't bother keeping track of the rectangles then */
+ xenfb->up_fullscreen = 1;
+ } else {
+ xenfb->up_rects[xenfb->up_count].x = x;
+ xenfb->up_rects[xenfb->up_count].y = y;
+ xenfb->up_rects[xenfb->up_count].w = w;
+ xenfb->up_rects[xenfb->up_count].h = h;
+ xenfb->up_count++;
+ }
+ break;
+#ifdef XENFB_TYPE_RESIZE
+ case XENFB_TYPE_RESIZE:
+ if (xenfb_configure_fb(xenfb, xenfb->fb_len,
+ event->resize.width,
+ event->resize.height,
+ event->resize.depth,
+ xenfb->fb_len,
+ event->resize.offset,
+ event->resize.stride) < 0)
+ break;
+ xenfb_invalidate(xenfb);
+ break;
+#endif
+ }
+ }
+ xen_mb(); /* ensure we're done with ring contents */
+ page->out_cons = cons;
+}
+
+static int fb_init(struct XenDevice *xendev)
+{
+ struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
+
+ if (!fb->c.ds) {
+ /* xen_set_display() below will set that and trigger us again */
+ xen_be_printf(xendev, 1, "ds not set (yet)\n");
+ return -1;
+ }
+
+ fb->refresh_period = -1;
+
+#ifdef XENFB_TYPE_RESIZE
+ xenstore_write_be_int(xendev, "feature-resize", 1);
+#endif
+ return 0;
+}
+
+static int fb_connect(struct XenDevice *xendev)
+{
+ struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
+ struct xenfb_page *fb_page;
+ int videoram;
+ int rc;
+
+ if (-1 == xenstore_read_fe_int(xendev, "videoram", &videoram))
+ videoram = 0;
+
+ rc = common_bind(&fb->c);
+ if (0 != rc)
+ return rc;
+
+ fb_page = fb->c.page;
+ rc = xenfb_configure_fb(fb, videoram * 1024 * 1024U,
+ fb_page->width, fb_page->height, fb_page->depth,
+ fb_page->mem_length, 0, fb_page->line_length);
+ if (0 != rc)
+ return rc;
+
+ rc = xenfb_map_fb(fb);
+ if (0 != rc)
+ return rc;
+
+ if (!fb->have_console) {
+ graphic_console_init(fb->c.ds,
+ xenfb_update,
+ xenfb_invalidate,
+ NULL,
+ NULL,
+ fb);
+ fb->have_console = 1;
+ }
+
+ if (-1 == xenstore_read_fe_int(xendev, "feature-update",
&fb->feature_update))
+ fb->feature_update = 0;
+ if (fb->feature_update)
+ xenstore_write_be_int(xendev, "request-update", 1);
+
+ xen_be_printf(xendev, 1, "feature-update=%d, videoram=%d\n",
+ fb->feature_update, videoram);
+
+ return 0;
+}
+
+static void fb_disconnect(struct XenDevice *xendev)
+{
+ struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
+
+ /*
+ * FIXME: qemu can't un-init gfx display (yet?).
+ * Replacing the framebuffer with anonymous shared memory
+ * instead. This releases the guest pages and keeps qemu happy.
+ */
+ fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE,
+ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON,
+ -1, 0);
+ common_unbind(&fb->c);
+ fb->feature_update = 0;
+ fb->bug_trigger = 0;
+}
+
+static void fb_frontend_changed(struct XenDevice *xendev, const char *node)
+{
+ struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
+
+ /*
+ * Set state to Connected *again* once the frontend switched
+ * to connected. We must trigger the watch a second time to
+ * workaround a frontend bug.
+ */
+ if (0 == fb->bug_trigger && 0 == strcmp(node, "state") &&
+ xendev->fe_state == XenbusStateConnected &&
+ xendev->be_state == XenbusStateConnected) {
+ xen_be_printf(xendev, 2, "re-trigger connected (frontend bug)\n");
+ xen_be_set_state(xendev, XenbusStateConnected);
+ fb->bug_trigger = 1; /* only once */
+ }
+}
+
+static void fb_event(struct XenDevice *xendev)
+{
+ struct XenFB *xenfb = container_of(xendev, struct XenFB, c.xendev);
+
+ xenfb_handle_events(xenfb);
+ xen_be_send_notify(&xenfb->c.xendev);
+}
+
+/* -------------------------------------------------------------------- */
+
+struct XenDevOps xen_kbdmouse_ops = {
+ .size = sizeof(struct XenInput),
+ .init = input_init,
+ .connect = input_connect,
+ .disconnect = input_disconnect,
+ .event = input_event,
+};
+
+struct XenDevOps xen_framebuffer_ops = {
+ .size = sizeof(struct XenFB),
+ .init = fb_init,
+ .connect = fb_connect,
+ .disconnect = fb_disconnect,
+ .event = fb_event,
+ .frontend_changed = fb_frontend_changed,
+};
+
+static void xen_set_display_type(int domid, const char *type, DisplayState *ds)
+{
+ struct XenDevice *xendev;
+ struct common *c;
+
+ xendev = xen_be_find_xendev(type, domid, 0);
+ if (!xendev)
+ return;
+ c = container_of(xendev, struct common, xendev);
+ c->ds = ds;
+ xen_be_printf(xendev, 1, "ds is %p\n", ds);
+ /* retry ->init() */
+ xen_be_check_state(xendev);
+}
+
+void xen_set_display(int domid, DisplayState *ds)
+{
+ xen_set_display_type(domid, "vkbd", ds);
+ xen_set_display_type(domid, "vfb", ds);
+}
--
1.5.6.5
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