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/*
* Virtio GL Device
*
* Copyright (c) 2010 Intel Corporation
* Written by:
* Ian Molton <ian.molton@collabora.co.uk>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "virtio.h"
typedef target_phys_addr_t arg_t;
#include "opengl_process.h"
#include "opengl_exec.h"
#include <sys/time.h>
#include "tizen/src/debug_ch.h"
MULTI_DEBUG_CHANNEL(qemu, virtio-gl);
int decode_call_int(ProcessStruct *p, char *in_args, int args_len, char *r_buffer);
/* Uncomment to enable debugging - WARNING!!! changes ABI! */
//#define DEBUG_GLIO
typedef struct VirtIOGL
{
VirtIODevice vdev;
VirtQueue *vq;
} VirtIOGL;
struct d_hdr
{
int pid;
int rq_l;
int rrq_l;
#ifdef DEBUG_GLIO
int sum;
#endif
};
#define SIZE_OUT_HEADER sizeof(struct d_hdr)
#ifdef DEBUG_GLIO
#define SIZE_IN_HEADER (4*2)
#else
#define SIZE_IN_HEADER 4
#endif
static void virtio_gl_handle(VirtIODevice *vdev, VirtQueue *vq)
{
VirtQueueElement elem;
int nkill = 1;
TRACE("virtio_gl_handle called. \n");
while(virtqueue_pop(vq, &elem)) {
struct d_hdr *hdr = (struct d_hdr*)elem.out_sg[0].iov_base;
ProcessStruct *process;
int i, remain;
int ret = 0;
if(!elem.out_num) {
fprintf(stderr, "Bad packet\n");
goto done;
}
process = vmgl_get_process(hdr->pid);
if(hdr->rq_l) {
if(hdr->rrq_l) {
if(process->rq) { // Usually only the quit packet...
free(process->rq);
free(process->rrq);
}
// process->rq = process->rq_p = qemu_malloc(hdr->rq_l);
// process->rrq = process->rrq_p = qemu_malloc(hdr->rrq_l);
process->rq = process->rq_p = g_malloc(hdr->rq_l);
process->rrq = process->rrq_p = g_malloc(hdr->rrq_l);
process->rq_l = hdr->rq_l - SIZE_OUT_HEADER;
process->rrq_l = hdr->rrq_l;
#ifdef DEBUG_GLIO
process->sum = hdr->sum;
#endif
}
i = 0;
remain = process->rq_l - (process->rq_p - process->rq);
while(remain && i < elem.out_num){
char *src = (char *)elem.out_sg[i].iov_base;
int ilen = elem.out_sg[i].iov_len;
int len = remain;
if(i == 0) {
src += SIZE_OUT_HEADER;
ilen -= SIZE_OUT_HEADER;
}
if(len > ilen)
len = ilen;
memcpy(process->rq_p, src, len);
process->rq_p += len;
remain -= len;
i++;
}
if(process->rq_p >= process->rq + process->rq_l) {
#ifdef DEBUG_GLIO
int sum = 0;
for(i = 0; i < process->rq_l ; i++)
sum += process->rq[i];
if(sum != process->sum)
fprintf(stderr, "Checksum fail\n");
#endif
*(int*)process->rrq = nkill = decode_call_int(process,
process->rq, /* command_buffer */
process->rq_l, /* cmd buffer length */
process->rrq + SIZE_IN_HEADER); /* return buffer */
//qemu_free(process->rq);
g_free(process->rq);
process->rq = NULL;
#ifdef DEBUG_GLIO
sum = 0;
for(i = SIZE_IN_BUFFER; i < process->rrq_l ; i++)
sum += process->rrq[i];
*(int*)(process->rrq+sizeof(int)) = sum;
#endif
}
}
if(hdr->rrq_l && process->rq == NULL) {
i = 0;
remain = process->rrq_l - (process->rrq_p - process->rrq);
while(remain && i < elem.in_num) {
char *dst = elem.in_sg[i].iov_base;
int len = remain;
int ilen = elem.in_sg[i].iov_len;
if(len > ilen)
len = ilen;
memcpy(dst, process->rrq_p, len);
process->rrq_p += len;
remain -= len;
ret += len;
i++;
}
if(remain <= 0) {
//qemu_free(process->rrq);
g_free(process->rrq);
if(!nkill)
gl_disconnect(process);
}
}
done:
virtqueue_push(vq, &elem, ret);
virtio_notify(vdev, vq);
}
}
static uint32_t virtio_gl_get_features(VirtIODevice *vdev, uint32_t f)
{
return 0;
}
static void virtio_gl_save(QEMUFile *f, void *opaque)
{
VirtIOGL *s = opaque;
virtio_save(&s->vdev, f);
}
static int virtio_gl_load(QEMUFile *f, void *opaque, int version_id)
{
VirtIOGL *s = opaque;
if (version_id != 1)
return -EINVAL;
virtio_load(&s->vdev, f);
return 0;
}
VirtIODevice *virtio_gl_init(DeviceState *dev)
{
VirtIOGL *s;
s = (VirtIOGL *)virtio_common_init("virtio-gl", VIRTIO_ID_GL,
0, sizeof(VirtIOGL));
if (!s)
return NULL;
s->vdev.get_features = virtio_gl_get_features;
s->vq = virtio_add_queue(&s->vdev, 128, virtio_gl_handle);
register_savevm(dev, "virtio-gl", -1, 1, virtio_gl_save, virtio_gl_load, s);
return &s->vdev;
}
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