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qemu/hw/display/virtio-gpu.c

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/*
* Virtio GPU Device
*
* Copyright Red Hat, Inc. 2013-2014
*
* Authors:
* Dave Airlie <airlied@redhat.com>
* Gerd Hoffmann <kraxel@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qemu/iov.h"
#include "ui/console.h"
#include "trace.h"
#include "sysemu/dma.h"
#include "sysemu/sysemu.h"
#include "hw/virtio/virtio.h"
#include "migration/qemu-file-types.h"
#include "hw/virtio/virtio-gpu.h"
#include "hw/virtio/virtio-gpu-bswap.h"
#include "hw/virtio/virtio-gpu-pixman.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/display/edid.h"
#include "hw/qdev-properties.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#define VIRTIO_GPU_VM_VERSION 1
static struct virtio_gpu_simple_resource*
virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id);
static void virtio_gpu_cleanup_mapping(VirtIOGPU *g,
struct virtio_gpu_simple_resource *res);
#ifdef CONFIG_VIRGL
#include <virglrenderer.h>
#define VIRGL(_g, _virgl, _simple, ...) \
do { \
if (_g->parent_obj.use_virgl_renderer) { \
_virgl(__VA_ARGS__); \
} else { \
_simple(__VA_ARGS__); \
} \
} while (0)
#else
#define VIRGL(_g, _virgl, _simple, ...) \
do { \
_simple(__VA_ARGS__); \
} while (0)
#endif
static void update_cursor_data_simple(VirtIOGPU *g,
struct virtio_gpu_scanout *s,
uint32_t resource_id)
{
struct virtio_gpu_simple_resource *res;
uint32_t pixels;
res = virtio_gpu_find_resource(g, resource_id);
if (!res) {
return;
}
if (pixman_image_get_width(res->image) != s->current_cursor->width ||
pixman_image_get_height(res->image) != s->current_cursor->height) {
return;
}
pixels = s->current_cursor->width * s->current_cursor->height;
memcpy(s->current_cursor->data,
pixman_image_get_data(res->image),
pixels * sizeof(uint32_t));
}
#ifdef CONFIG_VIRGL
static void update_cursor_data_virgl(VirtIOGPU *g,
struct virtio_gpu_scanout *s,
uint32_t resource_id)
{
uint32_t width, height;
uint32_t pixels, *data;
data = virgl_renderer_get_cursor_data(resource_id, &width, &height);
if (!data) {
return;
}
if (width != s->current_cursor->width ||
height != s->current_cursor->height) {
free(data);
return;
}
pixels = s->current_cursor->width * s->current_cursor->height;
memcpy(s->current_cursor->data, data, pixels * sizeof(uint32_t));
free(data);
}
#endif
static void update_cursor(VirtIOGPU *g, struct virtio_gpu_update_cursor *cursor)
{
struct virtio_gpu_scanout *s;
bool move = cursor->hdr.type == VIRTIO_GPU_CMD_MOVE_CURSOR;
if (cursor->pos.scanout_id >= g->parent_obj.conf.max_outputs) {
return;
}
s = &g->parent_obj.scanout[cursor->pos.scanout_id];
trace_virtio_gpu_update_cursor(cursor->pos.scanout_id,
cursor->pos.x,
cursor->pos.y,
move ? "move" : "update",
cursor->resource_id);
if (!move) {
if (!s->current_cursor) {
s->current_cursor = cursor_alloc(64, 64);
}
s->current_cursor->hot_x = cursor->hot_x;
s->current_cursor->hot_y = cursor->hot_y;
if (cursor->resource_id > 0) {
VIRGL(g, update_cursor_data_virgl, update_cursor_data_simple,
g, s, cursor->resource_id);
}
dpy_cursor_define(s->con, s->current_cursor);
s->cursor = *cursor;
} else {
s->cursor.pos.x = cursor->pos.x;
s->cursor.pos.y = cursor->pos.y;
}
dpy_mouse_set(s->con, cursor->pos.x, cursor->pos.y,
cursor->resource_id ? 1 : 0);
}
static struct virtio_gpu_simple_resource *
virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id)
{
struct virtio_gpu_simple_resource *res;
QTAILQ_FOREACH(res, &g->reslist, next) {
if (res->resource_id == resource_id) {
return res;
}
}
return NULL;
}
void virtio_gpu_ctrl_response(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd,
struct virtio_gpu_ctrl_hdr *resp,
size_t resp_len)
{
size_t s;
if (cmd->cmd_hdr.flags & VIRTIO_GPU_FLAG_FENCE) {
resp->flags |= VIRTIO_GPU_FLAG_FENCE;
resp->fence_id = cmd->cmd_hdr.fence_id;
resp->ctx_id = cmd->cmd_hdr.ctx_id;
}
virtio_gpu_ctrl_hdr_bswap(resp);
s = iov_from_buf(cmd->elem.in_sg, cmd->elem.in_num, 0, resp, resp_len);
if (s != resp_len) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: response size incorrect %zu vs %zu\n",
__func__, s, resp_len);
}
virtqueue_push(cmd->vq, &cmd->elem, s);
virtio_notify(VIRTIO_DEVICE(g), cmd->vq);
cmd->finished = true;
}
void virtio_gpu_ctrl_response_nodata(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd,
enum virtio_gpu_ctrl_type type)
{
struct virtio_gpu_ctrl_hdr resp;
memset(&resp, 0, sizeof(resp));
resp.type = type;
virtio_gpu_ctrl_response(g, cmd, &resp, sizeof(resp));
}
void virtio_gpu_get_display_info(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
struct virtio_gpu_resp_display_info display_info;
trace_virtio_gpu_cmd_get_display_info();
memset(&display_info, 0, sizeof(display_info));
display_info.hdr.type = VIRTIO_GPU_RESP_OK_DISPLAY_INFO;
virtio_gpu_base_fill_display_info(VIRTIO_GPU_BASE(g), &display_info);
virtio_gpu_ctrl_response(g, cmd, &display_info.hdr,
sizeof(display_info));
}
static void
virtio_gpu_generate_edid(VirtIOGPU *g, int scanout,
struct virtio_gpu_resp_edid *edid)
{
VirtIOGPUBase *b = VIRTIO_GPU_BASE(g);
qemu_edid_info info = {
.prefx = b->req_state[scanout].width,
.prefy = b->req_state[scanout].height,
};
edid->size = cpu_to_le32(sizeof(edid->edid));
qemu_edid_generate(edid->edid, sizeof(edid->edid), &info);
}
void virtio_gpu_get_edid(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
struct virtio_gpu_resp_edid edid;
struct virtio_gpu_cmd_get_edid get_edid;
VirtIOGPUBase *b = VIRTIO_GPU_BASE(g);
VIRTIO_GPU_FILL_CMD(get_edid);
virtio_gpu_bswap_32(&get_edid, sizeof(get_edid));
if (get_edid.scanout >= b->conf.max_outputs) {
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
return;
}
trace_virtio_gpu_cmd_get_edid(get_edid.scanout);
memset(&edid, 0, sizeof(edid));
edid.hdr.type = VIRTIO_GPU_RESP_OK_EDID;
virtio_gpu_generate_edid(g, get_edid.scanout, &edid);
virtio_gpu_ctrl_response(g, cmd, &edid.hdr, sizeof(edid));
}
static uint32_t calc_image_hostmem(pixman_format_code_t pformat,
uint32_t width, uint32_t height)
{
/* Copied from pixman/pixman-bits-image.c, skip integer overflow check.
* pixman_image_create_bits will fail in case it overflow.
*/
int bpp = PIXMAN_FORMAT_BPP(pformat);
int stride = ((width * bpp + 0x1f) >> 5) * sizeof(uint32_t);
return height * stride;
}
static void virtio_gpu_resource_create_2d(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
pixman_format_code_t pformat;
struct virtio_gpu_simple_resource *res;
struct virtio_gpu_resource_create_2d c2d;
VIRTIO_GPU_FILL_CMD(c2d);
virtio_gpu_bswap_32(&c2d, sizeof(c2d));
trace_virtio_gpu_cmd_res_create_2d(c2d.resource_id, c2d.format,
c2d.width, c2d.height);
if (c2d.resource_id == 0) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: resource id 0 is not allowed\n",
__func__);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
return;
}
res = virtio_gpu_find_resource(g, c2d.resource_id);
if (res) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: resource already exists %d\n",
__func__, c2d.resource_id);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
return;
}
res = g_new0(struct virtio_gpu_simple_resource, 1);
res->width = c2d.width;
res->height = c2d.height;
res->format = c2d.format;
res->resource_id = c2d.resource_id;
pformat = virtio_gpu_get_pixman_format(c2d.format);
if (!pformat) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: host couldn't handle guest format %d\n",
__func__, c2d.format);
g_free(res);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
return;
}
res->hostmem = calc_image_hostmem(pformat, c2d.width, c2d.height);
if (res->hostmem + g->hostmem < g->conf_max_hostmem) {
res->image = pixman_image_create_bits(pformat,
c2d.width,
c2d.height,
NULL, 0);
}
if (!res->image) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: resource creation failed %d %d %d\n",
__func__, c2d.resource_id, c2d.width, c2d.height);
g_free(res);
cmd->error = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
return;
}
QTAILQ_INSERT_HEAD(&g->reslist, res, next);
g->hostmem += res->hostmem;
}
static void virtio_gpu_disable_scanout(VirtIOGPU *g, int scanout_id)
{
struct virtio_gpu_scanout *scanout = &g->parent_obj.scanout[scanout_id];
struct virtio_gpu_simple_resource *res;
DisplaySurface *ds = NULL;
if (scanout->resource_id == 0) {
return;
}
res = virtio_gpu_find_resource(g, scanout->resource_id);
if (res) {
res->scanout_bitmask &= ~(1 << scanout_id);
}
if (scanout_id == 0) {
/* primary head */
ds = qemu_create_message_surface(scanout->width ?: 640,
scanout->height ?: 480,
"Guest disabled display.");
}
dpy_gfx_replace_surface(scanout->con, ds);
scanout->resource_id = 0;
scanout->ds = NULL;
scanout->width = 0;
scanout->height = 0;
}
static void virtio_gpu_resource_destroy(VirtIOGPU *g,
struct virtio_gpu_simple_resource *res)
{
int i;
if (res->scanout_bitmask) {
for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
if (res->scanout_bitmask & (1 << i)) {
virtio_gpu_disable_scanout(g, i);
}
}
}
pixman_image_unref(res->image);
virtio_gpu_cleanup_mapping(g, res);
QTAILQ_REMOVE(&g->reslist, res, next);
g->hostmem -= res->hostmem;
g_free(res);
}
static void virtio_gpu_resource_unref(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
struct virtio_gpu_simple_resource *res;
struct virtio_gpu_resource_unref unref;
VIRTIO_GPU_FILL_CMD(unref);
virtio_gpu_bswap_32(&unref, sizeof(unref));
trace_virtio_gpu_cmd_res_unref(unref.resource_id);
res = virtio_gpu_find_resource(g, unref.resource_id);
if (!res) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
__func__, unref.resource_id);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
return;
}
virtio_gpu_resource_destroy(g, res);
}
static void virtio_gpu_transfer_to_host_2d(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
struct virtio_gpu_simple_resource *res;
int h;
uint32_t src_offset, dst_offset, stride;
int bpp;
pixman_format_code_t format;
struct virtio_gpu_transfer_to_host_2d t2d;
VIRTIO_GPU_FILL_CMD(t2d);
virtio_gpu_t2d_bswap(&t2d);
trace_virtio_gpu_cmd_res_xfer_toh_2d(t2d.resource_id);
res = virtio_gpu_find_resource(g, t2d.resource_id);
if (!res || !res->iov) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
__func__, t2d.resource_id);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
return;
}
if (t2d.r.x > res->width ||
t2d.r.y > res->height ||
t2d.r.width > res->width ||
t2d.r.height > res->height ||
t2d.r.x + t2d.r.width > res->width ||
t2d.r.y + t2d.r.height > res->height) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: transfer bounds outside resource"
" bounds for resource %d: %d %d %d %d vs %d %d\n",
__func__, t2d.resource_id, t2d.r.x, t2d.r.y,
t2d.r.width, t2d.r.height, res->width, res->height);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
return;
}
format = pixman_image_get_format(res->image);
bpp = DIV_ROUND_UP(PIXMAN_FORMAT_BPP(format), 8);
stride = pixman_image_get_stride(res->image);
if (t2d.offset || t2d.r.x || t2d.r.y ||
t2d.r.width != pixman_image_get_width(res->image)) {
void *img_data = pixman_image_get_data(res->image);
for (h = 0; h < t2d.r.height; h++) {
src_offset = t2d.offset + stride * h;
dst_offset = (t2d.r.y + h) * stride + (t2d.r.x * bpp);
iov_to_buf(res->iov, res->iov_cnt, src_offset,
(uint8_t *)img_data
+ dst_offset, t2d.r.width * bpp);
}
} else {
iov_to_buf(res->iov, res->iov_cnt, 0,
pixman_image_get_data(res->image),
pixman_image_get_stride(res->image)
* pixman_image_get_height(res->image));
}
}
static void virtio_gpu_resource_flush(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
struct virtio_gpu_simple_resource *res;
struct virtio_gpu_resource_flush rf;
pixman_region16_t flush_region;
int i;
VIRTIO_GPU_FILL_CMD(rf);
virtio_gpu_bswap_32(&rf, sizeof(rf));
trace_virtio_gpu_cmd_res_flush(rf.resource_id,
rf.r.width, rf.r.height, rf.r.x, rf.r.y);
res = virtio_gpu_find_resource(g, rf.resource_id);
if (!res) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
__func__, rf.resource_id);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
return;
}
if (rf.r.x > res->width ||
rf.r.y > res->height ||
rf.r.width > res->width ||
rf.r.height > res->height ||
rf.r.x + rf.r.width > res->width ||
rf.r.y + rf.r.height > res->height) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: flush bounds outside resource"
" bounds for resource %d: %d %d %d %d vs %d %d\n",
__func__, rf.resource_id, rf.r.x, rf.r.y,
rf.r.width, rf.r.height, res->width, res->height);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
return;
}
pixman_region_init_rect(&flush_region,
rf.r.x, rf.r.y, rf.r.width, rf.r.height);
for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
struct virtio_gpu_scanout *scanout;
pixman_region16_t region, finalregion;
pixman_box16_t *extents;
if (!(res->scanout_bitmask & (1 << i))) {
continue;
}
scanout = &g->parent_obj.scanout[i];
pixman_region_init(&finalregion);
pixman_region_init_rect(&region, scanout->x, scanout->y,
scanout->width, scanout->height);
pixman_region_intersect(&finalregion, &flush_region, &region);
pixman_region_translate(&finalregion, -scanout->x, -scanout->y);
extents = pixman_region_extents(&finalregion);
/* work out the area we need to update for each console */
dpy_gfx_update(g->parent_obj.scanout[i].con,
extents->x1, extents->y1,
extents->x2 - extents->x1,
extents->y2 - extents->y1);
pixman_region_fini(&region);
pixman_region_fini(&finalregion);
}
pixman_region_fini(&flush_region);
}
static void virtio_unref_resource(pixman_image_t *image, void *data)
{
pixman_image_unref(data);
}
static void virtio_gpu_set_scanout(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
struct virtio_gpu_simple_resource *res, *ores;
struct virtio_gpu_scanout *scanout;
pixman_format_code_t format;
uint32_t offset;
int bpp;
struct virtio_gpu_set_scanout ss;
VIRTIO_GPU_FILL_CMD(ss);
virtio_gpu_bswap_32(&ss, sizeof(ss));
trace_virtio_gpu_cmd_set_scanout(ss.scanout_id, ss.resource_id,
ss.r.width, ss.r.height, ss.r.x, ss.r.y);
if (ss.scanout_id >= g->parent_obj.conf.max_outputs) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d",
__func__, ss.scanout_id);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID;
return;
}
g->parent_obj.enable = 1;
if (ss.resource_id == 0) {
virtio_gpu_disable_scanout(g, ss.scanout_id);
return;
}
/* create a surface for this scanout */
res = virtio_gpu_find_resource(g, ss.resource_id);
if (!res) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
__func__, ss.resource_id);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
return;
}
if (ss.r.x > res->width ||
ss.r.y > res->height ||
ss.r.width < 16 ||
ss.r.height < 16 ||
ss.r.width > res->width ||
ss.r.height > res->height ||
ss.r.x + ss.r.width > res->width ||
ss.r.y + ss.r.height > res->height) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout %d bounds for"
" resource %d, (%d,%d)+%d,%d vs %d %d\n",
__func__, ss.scanout_id, ss.resource_id, ss.r.x, ss.r.y,
ss.r.width, ss.r.height, res->width, res->height);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER;
return;
}
scanout = &g->parent_obj.scanout[ss.scanout_id];
format = pixman_image_get_format(res->image);
bpp = DIV_ROUND_UP(PIXMAN_FORMAT_BPP(format), 8);
offset = (ss.r.x * bpp) + ss.r.y * pixman_image_get_stride(res->image);
if (!scanout->ds || surface_data(scanout->ds)
!= ((uint8_t *)pixman_image_get_data(res->image) + offset) ||
scanout->width != ss.r.width ||
scanout->height != ss.r.height) {
pixman_image_t *rect;
void *ptr = (uint8_t *)pixman_image_get_data(res->image) + offset;
rect = pixman_image_create_bits(format, ss.r.width, ss.r.height, ptr,
pixman_image_get_stride(res->image));
pixman_image_ref(res->image);
pixman_image_set_destroy_function(rect, virtio_unref_resource,
res->image);
/* realloc the surface ptr */
scanout->ds = qemu_create_displaysurface_pixman(rect);
if (!scanout->ds) {
cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
return;
}
pixman_image_unref(rect);
dpy_gfx_replace_surface(g->parent_obj.scanout[ss.scanout_id].con,
scanout->ds);
}
ores = virtio_gpu_find_resource(g, scanout->resource_id);
if (ores) {
ores->scanout_bitmask &= ~(1 << ss.scanout_id);
}
res->scanout_bitmask |= (1 << ss.scanout_id);
scanout->resource_id = ss.resource_id;
scanout->x = ss.r.x;
scanout->y = ss.r.y;
scanout->width = ss.r.width;
scanout->height = ss.r.height;
}
int virtio_gpu_create_mapping_iov(VirtIOGPU *g,
struct virtio_gpu_resource_attach_backing *ab,
struct virtio_gpu_ctrl_command *cmd,
uint64_t **addr, struct iovec **iov)
{
struct virtio_gpu_mem_entry *ents;
size_t esize, s;
int i;
if (ab->nr_entries > 16384) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: nr_entries is too big (%d > 16384)\n",
__func__, ab->nr_entries);
return -1;
}
esize = sizeof(*ents) * ab->nr_entries;
ents = g_malloc(esize);
s = iov_to_buf(cmd->elem.out_sg, cmd->elem.out_num,
sizeof(*ab), ents, esize);
if (s != esize) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: command data size incorrect %zu vs %zu\n",
__func__, s, esize);
g_free(ents);
return -1;
}
*iov = g_malloc0(sizeof(struct iovec) * ab->nr_entries);
if (addr) {
*addr = g_malloc0(sizeof(uint64_t) * ab->nr_entries);
}
for (i = 0; i < ab->nr_entries; i++) {
uint64_t a = le64_to_cpu(ents[i].addr);
uint32_t l = le32_to_cpu(ents[i].length);
hwaddr len = l;
(*iov)[i].iov_len = l;
(*iov)[i].iov_base = dma_memory_map(VIRTIO_DEVICE(g)->dma_as,
a, &len, DMA_DIRECTION_TO_DEVICE);
if (addr) {
(*addr)[i] = a;
}
if (!(*iov)[i].iov_base || len != l) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: failed to map MMIO memory for"
" resource %d element %d\n",
__func__, ab->resource_id, i);
virtio_gpu_cleanup_mapping_iov(g, *iov, i);
g_free(ents);
*iov = NULL;
if (addr) {
g_free(*addr);
*addr = NULL;
}
return -1;
}
}
g_free(ents);
return 0;
}
void virtio_gpu_cleanup_mapping_iov(VirtIOGPU *g,
struct iovec *iov, uint32_t count)
{
int i;
for (i = 0; i < count; i++) {
dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
iov[i].iov_base, iov[i].iov_len,
DMA_DIRECTION_TO_DEVICE,
iov[i].iov_len);
}
g_free(iov);
}
static void virtio_gpu_cleanup_mapping(VirtIOGPU *g,
struct virtio_gpu_simple_resource *res)
{
virtio_gpu_cleanup_mapping_iov(g, res->iov, res->iov_cnt);
res->iov = NULL;
res->iov_cnt = 0;
g_free(res->addrs);
res->addrs = NULL;
}
static void
virtio_gpu_resource_attach_backing(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
struct virtio_gpu_simple_resource *res;
struct virtio_gpu_resource_attach_backing ab;
int ret;
VIRTIO_GPU_FILL_CMD(ab);
virtio_gpu_bswap_32(&ab, sizeof(ab));
trace_virtio_gpu_cmd_res_back_attach(ab.resource_id);
res = virtio_gpu_find_resource(g, ab.resource_id);
if (!res) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
__func__, ab.resource_id);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
return;
}
if (res->iov) {
cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
return;
}
ret = virtio_gpu_create_mapping_iov(g, &ab, cmd, &res->addrs, &res->iov);
if (ret != 0) {
cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
return;
}
res->iov_cnt = ab.nr_entries;
}
static void
virtio_gpu_resource_detach_backing(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
struct virtio_gpu_simple_resource *res;
struct virtio_gpu_resource_detach_backing detach;
VIRTIO_GPU_FILL_CMD(detach);
virtio_gpu_bswap_32(&detach, sizeof(detach));
trace_virtio_gpu_cmd_res_back_detach(detach.resource_id);
res = virtio_gpu_find_resource(g, detach.resource_id);
if (!res || !res->iov) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
__func__, detach.resource_id);
cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
return;
}
virtio_gpu_cleanup_mapping(g, res);
}
static void virtio_gpu_simple_process_cmd(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
VIRTIO_GPU_FILL_CMD(cmd->cmd_hdr);
virtio_gpu_ctrl_hdr_bswap(&cmd->cmd_hdr);
switch (cmd->cmd_hdr.type) {
case VIRTIO_GPU_CMD_GET_DISPLAY_INFO:
virtio_gpu_get_display_info(g, cmd);
break;
case VIRTIO_GPU_CMD_GET_EDID:
virtio_gpu_get_edid(g, cmd);
break;
case VIRTIO_GPU_CMD_RESOURCE_CREATE_2D:
virtio_gpu_resource_create_2d(g, cmd);
break;
case VIRTIO_GPU_CMD_RESOURCE_UNREF:
virtio_gpu_resource_unref(g, cmd);
break;
case VIRTIO_GPU_CMD_RESOURCE_FLUSH:
virtio_gpu_resource_flush(g, cmd);
break;
case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D:
virtio_gpu_transfer_to_host_2d(g, cmd);
break;
case VIRTIO_GPU_CMD_SET_SCANOUT:
virtio_gpu_set_scanout(g, cmd);
break;
case VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING:
virtio_gpu_resource_attach_backing(g, cmd);
break;
case VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING:
virtio_gpu_resource_detach_backing(g, cmd);
break;
default:
cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
break;
}
if (!cmd->finished) {
virtio_gpu_ctrl_response_nodata(g, cmd, cmd->error ? cmd->error :
VIRTIO_GPU_RESP_OK_NODATA);
}
}
static void virtio_gpu_handle_ctrl_cb(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOGPU *g = VIRTIO_GPU(vdev);
qemu_bh_schedule(g->ctrl_bh);
}
static void virtio_gpu_handle_cursor_cb(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOGPU *g = VIRTIO_GPU(vdev);
qemu_bh_schedule(g->cursor_bh);
}
void virtio_gpu_process_cmdq(VirtIOGPU *g)
{
struct virtio_gpu_ctrl_command *cmd;
while (!QTAILQ_EMPTY(&g->cmdq)) {
cmd = QTAILQ_FIRST(&g->cmdq);
if (g->parent_obj.renderer_blocked) {
break;
}
/* process command */
VIRGL(g, virtio_gpu_virgl_process_cmd, virtio_gpu_simple_process_cmd,
g, cmd);
QTAILQ_REMOVE(&g->cmdq, cmd, next);
if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
g->stats.requests++;
}
if (!cmd->finished) {
QTAILQ_INSERT_TAIL(&g->fenceq, cmd, next);
g->inflight++;
if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
if (g->stats.max_inflight < g->inflight) {
g->stats.max_inflight = g->inflight;
}
fprintf(stderr, "inflight: %3d (+)\r", g->inflight);
}
} else {
g_free(cmd);
}
}
}
static void virtio_gpu_gl_unblock(VirtIOGPUBase *b)
{
VirtIOGPU *g = VIRTIO_GPU(b);
#ifdef CONFIG_VIRGL
if (g->renderer_reset) {
g->renderer_reset = false;
virtio_gpu_virgl_reset(g);
}
#endif
virtio_gpu_process_cmdq(g);
}
static void virtio_gpu_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOGPU *g = VIRTIO_GPU(vdev);
struct virtio_gpu_ctrl_command *cmd;
if (!virtio_queue_ready(vq)) {
return;
}
#ifdef CONFIG_VIRGL
if (!g->renderer_inited && g->parent_obj.use_virgl_renderer) {
virtio_gpu_virgl_init(g);
g->renderer_inited = true;
}
#endif
cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
while (cmd) {
cmd->vq = vq;
cmd->error = 0;
cmd->finished = false;
QTAILQ_INSERT_TAIL(&g->cmdq, cmd, next);
cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
}
virtio_gpu_process_cmdq(g);
#ifdef CONFIG_VIRGL
if (g->parent_obj.use_virgl_renderer) {
virtio_gpu_virgl_fence_poll(g);
}
#endif
}
static void virtio_gpu_ctrl_bh(void *opaque)
{
VirtIOGPU *g = opaque;
virtio_gpu_handle_ctrl(&g->parent_obj.parent_obj, g->ctrl_vq);
}
static void virtio_gpu_handle_cursor(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOGPU *g = VIRTIO_GPU(vdev);
VirtQueueElement *elem;
size_t s;
struct virtio_gpu_update_cursor cursor_info;
if (!virtio_queue_ready(vq)) {
return;
}
for (;;) {
elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
if (!elem) {
break;
}
s = iov_to_buf(elem->out_sg, elem->out_num, 0,
&cursor_info, sizeof(cursor_info));
if (s != sizeof(cursor_info)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: cursor size incorrect %zu vs %zu\n",
__func__, s, sizeof(cursor_info));
} else {
virtio_gpu_bswap_32(&cursor_info, sizeof(cursor_info));
update_cursor(g, &cursor_info);
}
virtqueue_push(vq, elem, 0);
virtio_notify(vdev, vq);
g_free(elem);
}
}
static void virtio_gpu_cursor_bh(void *opaque)
{
VirtIOGPU *g = opaque;
virtio_gpu_handle_cursor(&g->parent_obj.parent_obj, g->cursor_vq);
}
static const VMStateDescription vmstate_virtio_gpu_scanout = {
.name = "virtio-gpu-one-scanout",
.version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(resource_id, struct virtio_gpu_scanout),
VMSTATE_UINT32(width, struct virtio_gpu_scanout),
VMSTATE_UINT32(height, struct virtio_gpu_scanout),
VMSTATE_INT32(x, struct virtio_gpu_scanout),
VMSTATE_INT32(y, struct virtio_gpu_scanout),
VMSTATE_UINT32(cursor.resource_id, struct virtio_gpu_scanout),
VMSTATE_UINT32(cursor.hot_x, struct virtio_gpu_scanout),
VMSTATE_UINT32(cursor.hot_y, struct virtio_gpu_scanout),
VMSTATE_UINT32(cursor.pos.x, struct virtio_gpu_scanout),
VMSTATE_UINT32(cursor.pos.y, struct virtio_gpu_scanout),
VMSTATE_END_OF_LIST()
},
};
static const VMStateDescription vmstate_virtio_gpu_scanouts = {
.name = "virtio-gpu-scanouts",
.version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_INT32(parent_obj.enable, struct VirtIOGPU),
VMSTATE_UINT32_EQUAL(parent_obj.conf.max_outputs,
struct VirtIOGPU, NULL),
VMSTATE_STRUCT_VARRAY_UINT32(parent_obj.scanout, struct VirtIOGPU,
parent_obj.conf.max_outputs, 1,
vmstate_virtio_gpu_scanout,
struct virtio_gpu_scanout),
VMSTATE_END_OF_LIST()
},
};
static int virtio_gpu_save(QEMUFile *f, void *opaque, size_t size,
const VMStateField *field, QJSON *vmdesc)
{
VirtIOGPU *g = opaque;
struct virtio_gpu_simple_resource *res;
int i;
/* in 2d mode we should never find unprocessed commands here */
assert(QTAILQ_EMPTY(&g->cmdq));
QTAILQ_FOREACH(res, &g->reslist, next) {
qemu_put_be32(f, res->resource_id);
qemu_put_be32(f, res->width);
qemu_put_be32(f, res->height);
qemu_put_be32(f, res->format);
qemu_put_be32(f, res->iov_cnt);
for (i = 0; i < res->iov_cnt; i++) {
qemu_put_be64(f, res->addrs[i]);
qemu_put_be32(f, res->iov[i].iov_len);
}
qemu_put_buffer(f, (void *)pixman_image_get_data(res->image),
pixman_image_get_stride(res->image) * res->height);
}
qemu_put_be32(f, 0); /* end of list */
return vmstate_save_state(f, &vmstate_virtio_gpu_scanouts, g, NULL);
}
static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
const VMStateField *field)
{
VirtIOGPU *g = opaque;
struct virtio_gpu_simple_resource *res;
struct virtio_gpu_scanout *scanout;
uint32_t resource_id, pformat;
int i;
g->hostmem = 0;
resource_id = qemu_get_be32(f);
while (resource_id != 0) {
res = virtio_gpu_find_resource(g, resource_id);
if (res) {
return -EINVAL;
}
res = g_new0(struct virtio_gpu_simple_resource, 1);
res->resource_id = resource_id;
res->width = qemu_get_be32(f);
res->height = qemu_get_be32(f);
res->format = qemu_get_be32(f);
res->iov_cnt = qemu_get_be32(f);
/* allocate */
pformat = virtio_gpu_get_pixman_format(res->format);
if (!pformat) {
g_free(res);
return -EINVAL;
}
res->image = pixman_image_create_bits(pformat,
res->width, res->height,
NULL, 0);
if (!res->image) {
g_free(res);
return -EINVAL;
}
res->hostmem = calc_image_hostmem(pformat, res->width, res->height);
res->addrs = g_new(uint64_t, res->iov_cnt);
res->iov = g_new(struct iovec, res->iov_cnt);
/* read data */
for (i = 0; i < res->iov_cnt; i++) {
res->addrs[i] = qemu_get_be64(f);
res->iov[i].iov_len = qemu_get_be32(f);
}
qemu_get_buffer(f, (void *)pixman_image_get_data(res->image),
pixman_image_get_stride(res->image) * res->height);
/* restore mapping */
for (i = 0; i < res->iov_cnt; i++) {
hwaddr len = res->iov[i].iov_len;
res->iov[i].iov_base =
dma_memory_map(VIRTIO_DEVICE(g)->dma_as,
res->addrs[i], &len, DMA_DIRECTION_TO_DEVICE);
if (!res->iov[i].iov_base || len != res->iov[i].iov_len) {
/* Clean up the half-a-mapping we just created... */
if (res->iov[i].iov_base) {
dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
res->iov[i].iov_base,
len,
DMA_DIRECTION_TO_DEVICE,
0);
}
/* ...and the mappings for previous loop iterations */
res->iov_cnt = i;
virtio_gpu_cleanup_mapping(g, res);
pixman_image_unref(res->image);
g_free(res);
return -EINVAL;
}
}
QTAILQ_INSERT_HEAD(&g->reslist, res, next);
g->hostmem += res->hostmem;
resource_id = qemu_get_be32(f);
}
/* load & apply scanout state */
vmstate_load_state(f, &vmstate_virtio_gpu_scanouts, g, 1);
for (i = 0; i < g->parent_obj.conf.max_outputs; i++) {
scanout = &g->parent_obj.scanout[i];
if (!scanout->resource_id) {
continue;
}
res = virtio_gpu_find_resource(g, scanout->resource_id);
if (!res) {
return -EINVAL;
}
scanout->ds = qemu_create_displaysurface_pixman(res->image);
if (!scanout->ds) {
return -EINVAL;
}
dpy_gfx_replace_surface(scanout->con, scanout->ds);
dpy_gfx_update_full(scanout->con);
if (scanout->cursor.resource_id) {
update_cursor(g, &scanout->cursor);
}
res->scanout_bitmask |= (1 << i);
}
return 0;
}
static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(qdev);
VirtIOGPU *g = VIRTIO_GPU(qdev);
bool have_virgl;
#if !defined(CONFIG_VIRGL) || defined(HOST_WORDS_BIGENDIAN)
have_virgl = false;
#else
have_virgl = display_opengl;
#endif
if (!have_virgl) {
g->parent_obj.conf.flags &= ~(1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED);
} else {
#if defined(CONFIG_VIRGL)
VIRTIO_GPU_BASE(g)->virtio_config.num_capsets =
virtio_gpu_virgl_get_num_capsets(g);
#endif
}
if (!virtio_gpu_base_device_realize(qdev,
virtio_gpu_handle_ctrl_cb,
virtio_gpu_handle_cursor_cb,
errp)) {
return;
}
g->ctrl_vq = virtio_get_queue(vdev, 0);
g->cursor_vq = virtio_get_queue(vdev, 1);
g->ctrl_bh = qemu_bh_new(virtio_gpu_ctrl_bh, g);
g->cursor_bh = qemu_bh_new(virtio_gpu_cursor_bh, g);
QTAILQ_INIT(&g->reslist);
QTAILQ_INIT(&g->cmdq);
QTAILQ_INIT(&g->fenceq);
}
static void virtio_gpu_reset(VirtIODevice *vdev)
{
VirtIOGPU *g = VIRTIO_GPU(vdev);
struct virtio_gpu_simple_resource *res, *tmp;
struct virtio_gpu_ctrl_command *cmd;
#ifdef CONFIG_VIRGL
if (g->parent_obj.use_virgl_renderer) {
virtio_gpu_virgl_reset(g);
}
#endif
QTAILQ_FOREACH_SAFE(res, &g->reslist, next, tmp) {
virtio_gpu_resource_destroy(g, res);
}
while (!QTAILQ_EMPTY(&g->cmdq)) {
cmd = QTAILQ_FIRST(&g->cmdq);
QTAILQ_REMOVE(&g->cmdq, cmd, next);
g_free(cmd);
}
while (!QTAILQ_EMPTY(&g->fenceq)) {
cmd = QTAILQ_FIRST(&g->fenceq);
QTAILQ_REMOVE(&g->fenceq, cmd, next);
g->inflight--;
g_free(cmd);
}
#ifdef CONFIG_VIRGL
if (g->parent_obj.use_virgl_renderer) {
if (g->parent_obj.renderer_blocked) {
g->renderer_reset = true;
} else {
virtio_gpu_virgl_reset(g);
}
g->parent_obj.use_virgl_renderer = false;
}
#endif
virtio_gpu_base_reset(VIRTIO_GPU_BASE(vdev));
}
static void
virtio_gpu_get_config(VirtIODevice *vdev, uint8_t *config)
{
VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);
memcpy(config, &g->virtio_config, sizeof(g->virtio_config));
}
static void
virtio_gpu_set_config(VirtIODevice *vdev, const uint8_t *config)
{
VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);
const struct virtio_gpu_config *vgconfig =
(const struct virtio_gpu_config *)config;
if (vgconfig->events_clear) {
g->virtio_config.events_read &= ~vgconfig->events_clear;
}
}
/*
* For historical reasons virtio_gpu does not adhere to virtio migration
* scheme as described in doc/virtio-migration.txt, in a sense that no
* save/load callback are provided to the core. Instead the device data
* is saved/loaded after the core data.
*
* Because of this we need a special vmsd.
*/
static const VMStateDescription vmstate_virtio_gpu = {
.name = "virtio-gpu",
.minimum_version_id = VIRTIO_GPU_VM_VERSION,
.version_id = VIRTIO_GPU_VM_VERSION,
.fields = (VMStateField[]) {
VMSTATE_VIRTIO_DEVICE /* core */,
{
.name = "virtio-gpu",
.info = &(const VMStateInfo) {
.name = "virtio-gpu",
.get = virtio_gpu_load,
.put = virtio_gpu_save,
},
.flags = VMS_SINGLE,
} /* device */,
VMSTATE_END_OF_LIST()
},
};
static Property virtio_gpu_properties[] = {
VIRTIO_GPU_BASE_PROPERTIES(VirtIOGPU, parent_obj.conf),
DEFINE_PROP_SIZE("max_hostmem", VirtIOGPU, conf_max_hostmem,
256 * MiB),
#ifdef CONFIG_VIRGL
DEFINE_PROP_BIT("virgl", VirtIOGPU, parent_obj.conf.flags,
VIRTIO_GPU_FLAG_VIRGL_ENABLED, true),
DEFINE_PROP_BIT("stats", VirtIOGPU, parent_obj.conf.flags,
VIRTIO_GPU_FLAG_STATS_ENABLED, false),
#endif
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_gpu_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_CLASS(klass);
vgc->gl_unblock = virtio_gpu_gl_unblock;
vdc->realize = virtio_gpu_device_realize;
vdc->reset = virtio_gpu_reset;
vdc->get_config = virtio_gpu_get_config;
vdc->set_config = virtio_gpu_set_config;
dc->vmsd = &vmstate_virtio_gpu;
device_class_set_props(dc, virtio_gpu_properties);
}
static const TypeInfo virtio_gpu_info = {
.name = TYPE_VIRTIO_GPU,
.parent = TYPE_VIRTIO_GPU_BASE,
.instance_size = sizeof(VirtIOGPU),
.class_init = virtio_gpu_class_init,
};
static void virtio_register_types(void)
{
type_register_static(&virtio_gpu_info);
}
type_init(virtio_register_types)
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