[Qemu-devel] [RfC PATCH 06/11] spice: simple display

[Gerd Hoffmann <kraxel@redhat.com>]

With that patch applied you'll actually see the guests screen in the
spice client.  This does *not* bring qxl and full spice support though.
This is basically the qxl vga mode made more generic, so it plays
together with any qemu-emulated gfx card.  You can display stdvga or
cirrus via spice client.  You can have both vnc and spice enabled and
clients connected at the same time.
---
 Makefile.target |    2 +-
 qemu-spice.h    |    1 +
 spice-display.c |  429 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 spice-display.h |   47 ++++++
 vl.c            |    7 +-
 5 files changed, 484 insertions(+), 2 deletions(-)
 create mode 100644 spice-display.c
 create mode 100644 spice-display.h

diff --git a/Makefile.target b/Makefile.target
index 4da1b27..842a489 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -194,7 +194,7 @@ obj-i386-y += cirrus_vga.o apic.o ioapic.o piix_pci.o
 obj-i386-y += vmmouse.o vmport.o hpet.o
 obj-i386-y += device-hotplug.o pci-hotplug.o smbios.o wdt_ib700.o
 obj-i386-y += debugcon.o multiboot.o
-obj-i386-$(CONFIG_SPICE) += spice.o spice-input.o
+obj-i386-$(CONFIG_SPICE) += spice.o spice-input.o spice-display.o
 
 # shared objects
 obj-ppc-y = ppc.o
diff --git a/qemu-spice.h b/qemu-spice.h
index ceb3db2..f061004 100644
--- a/qemu-spice.h
+++ b/qemu-spice.h
@@ -13,6 +13,7 @@ extern int using_spice;
 
 void qemu_spice_init(void);
 void qemu_spice_input_init(void);
+void qemu_spice_display_init(DisplayState *ds);
 
 #else  /* CONFIG_SPICE */
 
diff --git a/spice-display.c b/spice-display.c
new file mode 100644
index 0000000..44c259d
--- /dev/null
+++ b/spice-display.c
@@ -0,0 +1,429 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+#include <pthread.h>
+
+#include "qemu-common.h"
+#include "qemu-spice.h"
+#include "qemu-timer.h"
+#include "qemu-queue.h"
+#include "monitor.h"
+#include "console.h"
+#include "sysemu.h"
+
+#include "spice-display.h"
+
+static int debug = 1;
+
+int qemu_spice_rect_is_empty(const SpiceRect* r)
+{
+    return r->top == r->bottom || r->left == r->right;
+}
+
+void qemu_spice_rect_union(SpiceRect *dest, const SpiceRect *r)
+{
+    if (qemu_spice_rect_is_empty(r)) {
+        return;
+    }
+
+    if (qemu_spice_rect_is_empty(dest)) {
+        *dest = *r;
+        return;
+    }
+
+    dest->top = MIN(dest->top, r->top);
+    dest->left = MIN(dest->left, r->left);
+    dest->bottom = MAX(dest->bottom, r->bottom);
+    dest->right = MAX(dest->right, r->right);
+}
+
+SimpleSpiceUpdate *qemu_spice_create_update(SimpleSpiceDisplay *ssd)
+{
+    SimpleSpiceUpdate *update;
+    QXLDrawable *drawable;
+    QXLImage *image;
+    QXLCommand *cmd;
+    uint8_t *src, *dst;
+    int by, bw, bh;
+
+    if (qemu_spice_rect_is_empty(&ssd->dirty)) {
+        return NULL;
+    };
+
+    pthread_mutex_lock(&ssd->lock);
+    if (debug > 1)
+        fprintf(stderr, "%s: lr %d -> %d,  tb -> %d -> %d\n", __FUNCTION__,
+                ssd->dirty.left, ssd->dirty.right,
+                ssd->dirty.top, ssd->dirty.bottom);
+
+    update   = qemu_mallocz(sizeof(*update));
+    drawable = &update->drawable;
+    image    = &update->image;
+    cmd      = &update->ext.cmd;
+
+    bw       = ssd->dirty.right - ssd->dirty.left;
+    bh       = ssd->dirty.bottom - ssd->dirty.top;
+    update->bitmap = qemu_malloc(bw * bh * 4);
+
+    drawable->bbox            = ssd->dirty;
+    drawable->clip.type       = SPICE_CLIP_TYPE_NONE;
+    drawable->effect          = QXL_EFFECT_OPAQUE;
+    drawable->release_info.id = (intptr_t)update;
+    drawable->type            = QXL_DRAW_COPY;
+
+    drawable->u.copy.rop_decriptor   = SPICE_ROPD_OP_PUT;
+    drawable->u.copy.src_bitmap      = (intptr_t)image;
+    drawable->u.copy.src_area.right  = bw;
+    drawable->u.copy.src_area.bottom = bh;
+
+    QXL_SET_IMAGE_ID(image, QXL_IMAGE_GROUP_DEVICE, ssd->unique++);
+    image->descriptor.type   = SPICE_IMAGE_TYPE_BITMAP;
+    image->bitmap.flags      = QXL_BITMAP_DIRECT | QXL_BITMAP_TOP_DOWN;
+    image->bitmap.stride     = bw * 4;
+    image->descriptor.width  = image->bitmap.x = bw;
+    image->descriptor.height = image->bitmap.y = bh;
+    image->bitmap.data = (intptr_t)(update->bitmap);
+    image->bitmap.palette = 0;
+
+    src = ds_get_data(ssd->ds) +
+        ssd->dirty.top * ds_get_linesize(ssd->ds) +
+        ssd->dirty.left * ds_get_bytes_per_pixel(ssd->ds);
+    dst = update->bitmap;
+    for (by = 0; by < bh; by++) {
+        memcpy(dst, src, bw * ds_get_bytes_per_pixel(ssd->ds));
+        src += ds_get_linesize(ssd->ds);
+        dst += image->bitmap.stride;
+    }
+
+    switch (ds_get_bits_per_pixel(ssd->ds)) {
+    case 16:
+        image->bitmap.format = SPICE_BITMAP_FMT_16BIT;
+        break;
+    case 32:
+        image->bitmap.format = SPICE_BITMAP_FMT_32BIT;
+        break;
+    default:
+        fprintf(stderr, "%s: unhandled depth: %d bits\n", __FUNCTION__,
+                ds_get_bits_per_pixel(ssd->ds));
+        abort();
+    }
+
+    cmd->type = QXL_CMD_DRAW;
+    cmd->data = (intptr_t)drawable;
+
+    memset(&ssd->dirty, 0, sizeof(ssd->dirty));
+    pthread_mutex_unlock(&ssd->lock);
+    return update;
+}
+
+void qemu_spice_destroy_update(SimpleSpiceDisplay *sdpy, SimpleSpiceUpdate *update)
+{
+    qemu_free(update->bitmap);
+    qemu_free(update);
+}
+
+void qemu_spice_create_host_memslot(SimpleSpiceDisplay *ssd)
+{
+    QXLDevMemSlot memslot;
+
+    if (debug)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+
+    memset(&memslot, 0, sizeof(memslot));
+    memslot.slot_group_id = MEMSLOT_GROUP_HOST;
+    memslot.virt_end = ~0;
+    ssd->worker->add_memslot(ssd->worker, &memslot);
+}
+
+void qemu_spice_create_host_primary(SimpleSpiceDisplay *ssd)
+{
+    QXLDevSurfaceCreate surface;
+
+    if (debug)
+        fprintf(stderr, "%s: %dx%d\n", __FUNCTION__,
+                ds_get_width(ssd->ds), ds_get_height(ssd->ds));
+
+    surface.depth      = 32;
+    surface.width      = ds_get_width(ssd->ds);
+    surface.height     = ds_get_height(ssd->ds);
+    surface.stride     = -surface.width * 4;
+    surface.mouse_mode = 0;
+    surface.flags      = 0;
+    surface.type       = 0;
+    surface.mem        = (intptr_t)ssd->buf;
+    surface.group_id   = MEMSLOT_GROUP_HOST;
+    ssd->worker->create_primary_surface(ssd->worker, 0, &surface);
+}
+
+void qemu_spice_destroy_host_primary(SimpleSpiceDisplay *ssd)
+{
+    if (debug)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+
+    ssd->worker->destroy_primary_surface(ssd->worker, 0);
+}
+
+void qemu_spice_vm_change_state_handler(void *opaque, int running, int reason)
+{
+    SimpleSpiceDisplay *ssd = opaque;
+
+    if (running) {
+        ssd->worker->start(ssd->worker);
+    } else {
+        ssd->worker->stop(ssd->worker);
+    }
+    ssd->running = running;
+}
+
+/* display listener callbacks */
+
+void qemu_spice_display_update(SimpleSpiceDisplay *ssd,
+                               int x, int y, int w, int h)
+{
+    SpiceRect update_area;
+
+    if (debug > 1)
+        fprintf(stderr, "%s: x %d y %d w %d h %d\n", __FUNCTION__, x, y, w, h);
+    update_area.left = x,
+    update_area.right = x + w;
+    update_area.top = y;
+    update_area.bottom = y + h;
+
+    pthread_mutex_lock(&ssd->lock);
+    if (qemu_spice_rect_is_empty(&ssd->dirty)) {
+        ssd->notify++;
+    }
+    qemu_spice_rect_union(&ssd->dirty, &update_area);
+    pthread_mutex_unlock(&ssd->lock);
+}
+
+void qemu_spice_display_resize(SimpleSpiceDisplay *ssd)
+{
+    if (debug)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+
+    pthread_mutex_lock(&ssd->lock);
+    memset(&ssd->dirty, 0, sizeof(ssd->dirty));
+    pthread_mutex_unlock(&ssd->lock);
+
+    qemu_spice_destroy_host_primary(ssd);
+    qemu_spice_create_host_primary(ssd);
+
+    pthread_mutex_lock(&ssd->lock);
+    ssd->dirty.left   = 0;
+    ssd->dirty.right  = ds_get_width(ssd->ds);
+    ssd->dirty.top    = 0;
+    ssd->dirty.bottom = ds_get_height(ssd->ds);
+    ssd->notify++;
+    pthread_mutex_unlock(&ssd->lock);
+}
+
+void qemu_spice_display_refresh(SimpleSpiceDisplay *ssd)
+{
+    if (debug > 2)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    vga_hw_update();
+    if (ssd->notify) {
+        ssd->notify = 0;
+        ssd->worker->wakeup(ssd->worker);
+        if (debug > 1)
+            fprintf(stderr, "%s: notify\n", __FUNCTION__);
+    }
+}
+
+/* spice display interface callbacks */
+
+static void interface_attach_worker(QXLInstance *sin, QXLWorker *qxl_worker)
+{
+    SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
+
+    if (debug)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    ssd->worker = qxl_worker;
+}
+
+static void interface_set_compression_level(QXLInstance *sin, int level)
+{
+    if (debug)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    /* nothing to do */
+}
+
+static void interface_set_mm_time(QXLInstance *sin, uint32_t mm_time)
+{
+    if (debug > 2)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    /* nothing to do */
+}
+
+static void interface_get_init_info(QXLInstance *sin, QXLDevInitInfo *info)
+{
+    SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
+
+    info->memslot_gen_bits = MEMSLOT_GENERATION_BITS;
+    info->memslot_id_bits  = MEMSLOT_SLOT_BITS;
+    info->num_memslots = NUM_MEMSLOTS;
+    info->num_memslots_groups = NUM_MEMSLOTS_GROUPS;
+    info->internal_groupslot_id = 0;
+    info->qxl_ram_size = ssd->bufsize;
+    info->n_surfaces = 10000;
+}
+
+static int interface_get_command(QXLInstance *sin, struct QXLCommandExt *ext)
+{
+    SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
+    SimpleSpiceUpdate *update;
+
+    if (debug > 2)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    update = qemu_spice_create_update(ssd);
+    if (update == NULL) {
+        return false;
+    }
+    *ext = update->ext;
+    return true;
+}
+
+static int interface_req_cmd_notification(QXLInstance *sin)
+{
+    if (debug)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    return 1;
+}
+
+static int interface_has_command(QXLInstance *sin)
+{
+    SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
+
+    if (debug)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    return !qemu_spice_rect_is_empty(&ssd->dirty);
+}
+
+static void interface_release_resource(QXLInstance *sin,
+                                       struct QXLReleaseInfoExt ext)
+{
+    SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
+    uintptr_t id;
+
+    if (debug > 1)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    id = ext.info->id;
+    qemu_spice_destroy_update(ssd, (void*)id);
+}
+
+static int interface_get_cursor_command(QXLInstance *sin, struct QXLCommandExt *ext)
+{
+    if (debug > 2)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    return false;
+}
+
+static int interface_req_cursor_notification(QXLInstance *sin)
+{
+    if (debug)
+        fprintf(stderr, "%s:\n", __FUNCTION__);
+    return 1;
+}
+
+static void interface_get_update_area(QXLInstance *sin, const struct SpiceRect **rect , uint32_t **surface_id)
+{
+    fprintf(stderr, "%s: abort()\n", __FUNCTION__);
+    abort();
+}
+
+static void interface_notify_update(QXLInstance *sin, uint32_t update_id)
+{
+    fprintf(stderr, "%s: abort()\n", __FUNCTION__);
+    abort();
+}
+
+static void interface_set_save_data(QXLInstance *sin, void *data, int size)
+{
+    fprintf(stderr, "%s: abort()\n", __FUNCTION__);
+    abort();
+}
+
+static void *interface_get_save_data(QXLInstance *sin)
+{
+    fprintf(stderr, "%s: abort()\n", __FUNCTION__);
+    abort();
+}
+
+static int interface_flush_resources(QXLInstance *sin)
+{
+    fprintf(stderr, "%s: abort()\n", __FUNCTION__);
+    abort();
+    return 0;
+}
+
+static QXLInterface dpy_interface = {
+    .base.type               = SPICE_INTERFACE_QXL,
+    .base.description        = "qemu simple display",
+    .base.major_version      = SPICE_INTERFACE_QXL_MAJOR,
+    .base.minor_version      = SPICE_INTERFACE_QXL_MINOR,
+
+    .pci_vendor              = REDHAT_PCI_VENDOR_ID,
+    .pci_id                  = QXL_DEVICE_ID,
+    .pci_revision            = QXL_REVISION,
+
+    .attache_worker          = interface_attach_worker,
+    .set_compression_level   = interface_set_compression_level,
+    .set_mm_time             = interface_set_mm_time,
+
+    .get_init_info           = interface_get_init_info,
+    .get_command             = interface_get_command,
+    .req_cmd_notification    = interface_req_cmd_notification,
+    .has_command             = interface_has_command,
+    .release_resource        = interface_release_resource,
+    .get_cursor_command      = interface_get_cursor_command,
+    .req_cursor_notification = interface_req_cursor_notification,
+    .get_update_area         = interface_get_update_area,
+    .notify_update           = interface_notify_update,
+    .set_save_data           = interface_set_save_data,
+    .get_save_data           = interface_get_save_data,
+    .flush_resources         = interface_flush_resources,
+};
+
+static SimpleSpiceDisplay sdpy;
+
+static void display_update(struct DisplayState *ds, int x, int y, int w, int h)
+{
+    qemu_spice_display_update(&sdpy, x, y, w, h);
+}
+
+static void display_resize(struct DisplayState *ds)
+{
+    qemu_spice_display_resize(&sdpy);
+}
+
+static void display_refresh(struct DisplayState *ds)
+{
+    qemu_spice_display_refresh(&sdpy);
+}
+
+static DisplayChangeListener display_listener = {
+    .dpy_update  = display_update,
+    .dpy_resize  = display_resize,
+    .dpy_refresh = display_refresh,
+};
+
+void qemu_spice_display_init(DisplayState *ds)
+{
+    assert(sdpy.ds == NULL);
+    sdpy.ds = ds;
+    sdpy.bufsize = (16 * 1024 * 1024);
+    sdpy.buf = qemu_malloc(sdpy.bufsize);
+    pthread_mutex_init(&sdpy.lock, NULL);
+    register_displaychangelistener(ds, &display_listener);
+
+    sdpy.qxl.base.sif = &dpy_interface.base;
+    spice_server_add_interface(spice_server, &sdpy.qxl.base);
+    assert(sdpy.worker);
+
+    qemu_add_vm_change_state_handler(qemu_spice_vm_change_state_handler, &sdpy);
+    qemu_spice_create_host_memslot(&sdpy);
+    qemu_spice_create_host_primary(&sdpy);
+}
diff --git a/spice-display.h b/spice-display.h
new file mode 100644
index 0000000..0626543
--- /dev/null
+++ b/spice-display.h
@@ -0,0 +1,47 @@
+#include <spice/ipc_ring.h>
+#include <spice/draw.h>
+#include <spice/qxl_dev.h>
+
+#define NUM_MEMSLOTS 8
+#define MEMSLOT_GENERATION_BITS 8
+#define MEMSLOT_SLOT_BITS 8
+
+#define MEMSLOT_GROUP_HOST  0
+#define MEMSLOT_GROUP_GUEST 1
+#define NUM_MEMSLOTS_GROUPS 2
+
+typedef struct SimpleSpiceDisplay {
+    DisplayState *ds;
+    void *buf;
+    int bufsize;
+    QXLWorker *worker;
+    QXLInstance qxl;
+    int unique;
+
+    pthread_mutex_t lock;
+    SpiceRect dirty;
+    int notify;
+    int running;
+} SimpleSpiceDisplay;
+
+typedef struct SimpleSpiceUpdate {
+    QXLDrawable drawable;
+    QXLImage image;
+    QXLCommandExt ext;
+    uint8_t *bitmap;
+} SimpleSpiceUpdate;
+
+int qemu_spice_rect_is_empty(const SpiceRect* r);
+void qemu_spice_rect_union(SpiceRect *dest, const SpiceRect *r);
+
+SimpleSpiceUpdate *qemu_spice_create_update(SimpleSpiceDisplay *sdpy);
+void qemu_spice_destroy_update(SimpleSpiceDisplay *sdpy, SimpleSpiceUpdate *update);
+void qemu_spice_create_host_memslot(SimpleSpiceDisplay *ssd);
+void qemu_spice_create_host_primary(SimpleSpiceDisplay *ssd);
+void qemu_spice_destroy_host_primary(SimpleSpiceDisplay *ssd);
+void qemu_spice_vm_change_state_handler(void *opaque, int running, int reason);
+
+void qemu_spice_display_update(SimpleSpiceDisplay *ssd,
+                               int x, int y, int w, int h);
+void qemu_spice_display_resize(SimpleSpiceDisplay *ssd);
+void qemu_spice_display_refresh(SimpleSpiceDisplay *ssd);
diff --git a/vl.c b/vl.c
index c1b12a6..1fab3f9 100644
--- a/vl.c
+++ b/vl.c
@@ -3704,7 +3704,7 @@ int main(int argc, char **argv, char **envp)
     /* just use the first displaystate for the moment */
     ds = get_displaystate();
 
-    if (display_type == DT_DEFAULT) {
+    if (display_type == DT_DEFAULT && !using_spice) {
 #if defined(CONFIG_SDL) || defined(CONFIG_COCOA)
         display_type = DT_SDL;
 #else
@@ -3744,6 +3744,11 @@ int main(int argc, char **argv, char **envp)
     default:
         break;
     }
+#ifdef CONFIG_SPICE
+    if (using_spice) {
+        qemu_spice_display_init(ds);
+    }
+#endif
     dpy_resize(ds);
 
     dcl = ds->listeners;
-- 
1.6.6.1