From c26805e29312fee136008a57c70a2f5f140ba706 Mon Sep 17 00:00:00 2001
From: Alon Levy <alevy@redhat.com>
Date: Fri, 24 Feb 2012 23:19:31 +0200
Subject: [PATCH 418/434] qxl: make qxl_render_update async
RHBZ# 747011
Removes the last user of QXL_SYNC when using update drivers that use the
_ASYNC io ports.
The last user is qxl_render_update, it is called both by qxl_hw_update
which is the vga_hw_update_ptr passed to graphic_console_init, and by
qxl_hw_screen_dump.
At the same time the QXLRect area being passed to the red_worker thread
is passed as a copy, as part of the QXLCookie.
The implementation uses interface_update_area_complete with a bh to make
sure dpy_update and qxl_flip are called from the io thread, otherwise
the vga->ds->surface.data can change under our feet.
With this patch sdl+spice works fine. But spice by itself doesn't
produce the expected screendumps unless repeated a few times, due to
ppm_save being called before update_area (rendering done in spice server
thread) having a chance to complete. Fixed by next patch, but see commit
message for problem introduced by it.
Signed-off-by: Alon Levy <alevy@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
hw/qxl-render.c | 96 +++++++++++++++++++++++++++++++++++++---------------
hw/qxl.c | 69 ++++++++++++++++++++++++++++++++++---
hw/qxl.h | 10 ++++++
ui/spice-display.h | 6 ++++
4 files changed, 150 insertions(+), 31 deletions(-)
diff --git a/hw/qxl-render.c b/hw/qxl-render.c
index 4c22166..4857838 100644
--- a/hw/qxl-render.c
+++ b/hw/qxl-render.c
@@ -82,17 +82,25 @@ void qxl_render_resize(PCIQXLDevice *qxl)
}
}
-void qxl_render_update(PCIQXLDevice *qxl)
+static void qxl_set_rect_to_surface(PCIQXLDevice *qxl, QXLRect *area)
+{
+ area->left = 0;
+ area->right = qxl->guest_primary.surface.width;
+ area->top = 0;
+ area->bottom = qxl->guest_primary.surface.height;
+}
+
+static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
{
VGACommonState *vga = &qxl->vga;
- QXLRect dirty[32], update;
- int i, redraw = 0;
+ int i;
DisplaySurface *surface = vga->ds->surface;
if (qxl->guest_primary.resized) {
qxl->guest_primary.resized = 0;
-
qxl->guest_primary.data = memory_region_get_ram_ptr(&qxl->vga.vram);
+ qxl_set_rect_to_surface(qxl, &qxl->dirty[0]);
+ qxl->num_dirty_rects = 1;
dprint(qxl, 1, "%s: %dx%d, stride %d, bpp %d, depth %d\n",
__FUNCTION__,
qxl->guest_primary.surface.width,
@@ -103,9 +111,9 @@ void qxl_render_update(PCIQXLDevice *qxl)
}
if (surface->width != qxl->guest_primary.surface.width ||
surface->height != qxl->guest_primary.surface.height) {
- dprint(qxl, 1, "%s: resizing displaysurface to guest_primary\n",
- __func__);
if (qxl->guest_primary.qxl_stride > 0) {
+ dprint(qxl, 1, "%s: using guest_primary for displaysurface\n",
+ __func__);
qemu_free_displaysurface(vga->ds);
qemu_create_displaysurface_from(qxl->guest_primary.surface.width,
qxl->guest_primary.surface.height,
@@ -113,36 +121,70 @@ void qxl_render_update(PCIQXLDevice *qxl)
qxl->guest_primary.abs_stride,
qxl->guest_primary.data);
} else {
+ dprint(qxl, 1, "%s: resizing displaysurface to guest_primary\n",
+ __func__);
qemu_resize_displaysurface(vga->ds,
qxl->guest_primary.surface.width,
qxl->guest_primary.surface.height);
}
}
- update.left = 0;
- update.right = qxl->guest_primary.surface.width;
- update.top = 0;
- update.bottom = qxl->guest_primary.surface.height;
-
- memset(dirty, 0, sizeof(dirty));
- if (runstate_is_running() && qxl->guest_primary.commands) {
- qxl->guest_primary.commands = 0;
- qxl_spice_update_area(qxl, 0, &update,
- dirty, ARRAY_SIZE(dirty), 1, QXL_SYNC, NULL);
- }
- if (redraw) {
- memset(dirty, 0, sizeof(dirty));
- dirty[0] = update;
- }
- for (i = 0; i < ARRAY_SIZE(dirty); i++) {
- if (qemu_spice_rect_is_empty(dirty+i)) {
+ for (i = 0; i < qxl->num_dirty_rects; i++) {
+ if (qemu_spice_rect_is_empty(qxl->dirty+i)) {
break;
}
- qxl_flip(qxl, dirty+i);
+ qxl_flip(qxl, qxl->dirty+i);
dpy_update(vga->ds,
- dirty[i].left, dirty[i].top,
- dirty[i].right - dirty[i].left,
- dirty[i].bottom - dirty[i].top);
+ qxl->dirty[i].left, qxl->dirty[i].top,
+ qxl->dirty[i].right - qxl->dirty[i].left,
+ qxl->dirty[i].bottom - qxl->dirty[i].top);
+ }
+ qxl->num_dirty_rects = 0;
+}
+
+/*
+ * use ssd.lock to protect render_update_cookie_num.
+ * qxl_render_update is called by io thread or vcpu thread, and the completion
+ * callbacks are called by spice_server thread, defering to bh called from the
+ * io thread.
+ */
+void qxl_render_update(PCIQXLDevice *qxl)
+{
+ QXLCookie *cookie;
+
+ qemu_mutex_lock(&qxl->ssd.lock);
+
+ if (!runstate_is_running() || !qxl->guest_primary.commands) {
+ qxl_render_update_area_unlocked(qxl);
+ qemu_mutex_unlock(&qxl->ssd.lock);
+ return;
}
+
+ qxl->guest_primary.commands = 0;
+ qxl->render_update_cookie_num++;
+ qemu_mutex_unlock(&qxl->ssd.lock);
+ cookie = qxl_cookie_new(QXL_COOKIE_TYPE_RENDER_UPDATE_AREA,
+ 0);
+ qxl_set_rect_to_surface(qxl, &cookie->u.render.area);
+ qxl_spice_update_area(qxl, 0, &cookie->u.render.area, NULL,
+ 0, 1 /* clear_dirty_region */, QXL_ASYNC, cookie);
+}
+
+void qxl_render_update_area_bh(void *opaque)
+{
+ PCIQXLDevice *qxl = opaque;
+
+ qemu_mutex_lock(&qxl->ssd.lock);
+ qxl_render_update_area_unlocked(qxl);
+ qemu_mutex_unlock(&qxl->ssd.lock);
+}
+
+void qxl_render_update_area_done(PCIQXLDevice *qxl, QXLCookie *cookie)
+{
+ qemu_mutex_lock(&qxl->ssd.lock);
+ qemu_bh_schedule(qxl->update_area_bh);
+ qxl->render_update_cookie_num--;
+ qemu_mutex_unlock(&qxl->ssd.lock);
+ g_free(cookie);
}
static QEMUCursor *qxl_cursor(PCIQXLDevice *qxl, QXLCursor *cursor)
diff --git a/hw/qxl.c b/hw/qxl.c
index e6e65d9..73be115 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -750,6 +750,11 @@ static void interface_async_complete_io(PCIQXLDevice *qxl, QXLCookie *cookie)
__func__, current_async, cookie->io);
}
switch (current_async) {
+ case QXL_IO_MEMSLOT_ADD_ASYNC:
+ case QXL_IO_DESTROY_PRIMARY_ASYNC:
+ case QXL_IO_UPDATE_AREA_ASYNC:
+ case QXL_IO_FLUSH_SURFACES_ASYNC:
+ break;
case QXL_IO_CREATE_PRIMARY_ASYNC:
qxl_create_guest_primary_complete(qxl);
break;
@@ -759,11 +764,54 @@ static void interface_async_complete_io(PCIQXLDevice *qxl, QXLCookie *cookie)
case QXL_IO_DESTROY_SURFACE_ASYNC:
qxl_spice_destroy_surface_wait_complete(qxl, cookie->u.surface_id);
break;
+ default:
+ fprintf(stderr, "qxl: %s: unexpected current_async %d\n", __func__,
+ current_async);
}
qxl_send_events(qxl, QXL_INTERRUPT_IO_CMD);
}
/* called from spice server thread context only */
+static void interface_update_area_complete(QXLInstance *sin,
+ uint32_t surface_id,
+ QXLRect *dirty, uint32_t num_updated_rects)
+{
+ PCIQXLDevice *qxl = container_of(sin, PCIQXLDevice, ssd.qxl);
+ int i;
+ int qxl_i;
+
+ qemu_mutex_lock(&qxl->ssd.lock);
+ if (surface_id != 0 || !qxl->render_update_cookie_num) {
+ qemu_mutex_unlock(&qxl->ssd.lock);
+ return;
+ }
+ if (qxl->num_dirty_rects + num_updated_rects > QXL_NUM_DIRTY_RECTS) {
+ /*
+ * overflow - treat this as a full update. Not expected to be common.
+ */
+ dprint(qxl, 1, "%s: overflow of dirty rects\n", __func__);
+ qxl->guest_primary.resized = 1;
+ }
+ if (qxl->guest_primary.resized) {
+ /*
+ * Don't bother copying or scheduling the bh since we will flip
+ * the whole area anyway on completion of the update_area async call
+ */
+ qemu_mutex_unlock(&qxl->ssd.lock);
+ return;
+ }
+ qxl_i = qxl->num_dirty_rects;
+ for (i = 0; i < num_updated_rects; i++) {
+ qxl->dirty[qxl_i++] = dirty[i];
+ }
+ qxl->num_dirty_rects += num_updated_rects;
+ dprint(qxl, 1, "%s: scheduling update_area_bh, #dirty %d\n",
+ __func__, qxl->num_dirty_rects);
+ qemu_bh_schedule(qxl->update_area_bh);
+ qemu_mutex_unlock(&qxl->ssd.lock);
+}
+
+/* called from spice server thread context only */
static void interface_async_complete(QXLInstance *sin, uint64_t cookie_token)
{
PCIQXLDevice *qxl = container_of(sin, PCIQXLDevice, ssd.qxl);
@@ -772,12 +820,16 @@ static void interface_async_complete(QXLInstance *sin, uint64_t cookie_token)
switch (cookie->type) {
case QXL_COOKIE_TYPE_IO:
interface_async_complete_io(qxl, cookie);
+ g_free(cookie);
+ break;
+ case QXL_COOKIE_TYPE_RENDER_UPDATE_AREA:
+ qxl_render_update_area_done(qxl, cookie);
break;
default:
fprintf(stderr, "qxl: %s: unexpected cookie type %d\n",
__func__, cookie->type);
+ g_free(cookie);
}
- g_free(cookie);
}
static const QXLInterface qxl_interface = {
@@ -800,6 +852,7 @@ static const QXLInterface qxl_interface = {
.notify_update = interface_notify_update,
.flush_resources = interface_flush_resources,
.async_complete = interface_async_complete,
+ .update_area_complete = interface_update_area_complete,
};
static void qxl_enter_vga_mode(PCIQXLDevice *d)
@@ -1216,11 +1269,17 @@ async_common:
switch (io_port) {
case QXL_IO_UPDATE_AREA:
{
+ QXLCookie *cookie = NULL;
QXLRect update = d->ram->update_area;
+
+ if (async == QXL_ASYNC) {
+ cookie = qxl_cookie_new(QXL_COOKIE_TYPE_IO,
+ QXL_IO_UPDATE_AREA_ASYNC);
+ cookie->u.area = update;
+ }
qxl_spice_update_area(d, d->ram->update_surface,
- &update, NULL, 0, 0, async,
- qxl_cookie_new(QXL_COOKIE_TYPE_IO,
- QXL_IO_UPDATE_AREA_ASYNC));
+ cookie ? &cookie->u.area : &update,
+ NULL, 0, 0, async, cookie);
break;
}
case QXL_IO_NOTIFY_CMD:
@@ -1652,6 +1711,8 @@ static int qxl_init_common(PCIQXLDevice *qxl)
init_pipe_signaling(qxl);
qxl_reset_state(qxl);
+ qxl->update_area_bh = qemu_bh_new(qxl_render_update_area_bh, qxl);
+
return 0;
}
diff --git a/hw/qxl.h b/hw/qxl.h
index 1443925..86e415b 100644
--- a/hw/qxl.h
+++ b/hw/qxl.h
@@ -18,6 +18,8 @@ enum qxl_mode {
#define QXL_UNDEFINED_IO UINT32_MAX
+#define QXL_NUM_DIRTY_RECTS 64
+
typedef struct PCIQXLDevice {
PCIDevice pci;
SimpleSpiceDisplay ssd;
@@ -93,6 +95,12 @@ typedef struct PCIQXLDevice {
/* user-friendly properties (in megabytes) */
uint32_t ram_size_mb;
uint32_t vram_size_mb;
+
+ /* qxl_render_update state */
+ int render_update_cookie_num;
+ int num_dirty_rects;
+ QXLRect dirty[QXL_NUM_DIRTY_RECTS];
+ QEMUBH *update_area_bh;
} PCIQXLDevice;
#define PANIC_ON(x) if ((x)) { \
@@ -134,3 +142,5 @@ void qxl_log_command(PCIQXLDevice *qxl, const char *ring, QXLCommandExt *ext);
void qxl_render_resize(PCIQXLDevice *qxl);
void qxl_render_update(PCIQXLDevice *qxl);
void qxl_render_cursor(PCIQXLDevice *qxl, QXLCommandExt *ext);
+void qxl_render_update_area_done(PCIQXLDevice *qxl, QXLCookie *cookie);
+void qxl_render_update_area_bh(void *opaque);
diff --git a/ui/spice-display.h b/ui/spice-display.h
index 8a010cb..12e50b6 100644
--- a/ui/spice-display.h
+++ b/ui/spice-display.h
@@ -50,6 +50,7 @@ typedef enum qxl_async_io {
enum {
QXL_COOKIE_TYPE_IO,
+ QXL_COOKIE_TYPE_RENDER_UPDATE_AREA,
};
typedef struct QXLCookie {
@@ -57,6 +58,11 @@ typedef struct QXLCookie {
uint64_t io;
union {
uint32_t surface_id;
+ QXLRect area;
+ struct {
+ QXLRect area;
+ int redraw;
+ } render;
} u;
} QXLCookie;
--
1.7.10