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vmx: implement virtio reset

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This commit is contained in:
aiju 2017-06-15 15:58:52 +00:00
parent 2fe3b28f86
commit bd12cb47ce
1 changed files with 49 additions and 3 deletions
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52
sys/src/cmd/vmx/virtio.c
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@ -15,6 +15,8 @@ enum {
BUFWR = 2,
USEDNOIRQ = 1,
DRIVEROK = 4, /* devstat */
};
struct VIOBuf {
@ -37,6 +39,8 @@ struct VIOQueue {
u32int addr;
u16int availidx, usedidx;
void (*notify)(VIOQueue*);
int livebuf;
Rendez livebufrend;
};
struct VIONetDev {
@ -66,6 +70,7 @@ struct VIODev {
VIOQueue *qu;
int nqu;
u32int (*io)(int, u16int, u32int, int, VIODev *);
void (*reset)(VIODev *);
union {
VIONetDev net;
VIOBlkDev blk;
@ -119,7 +124,7 @@ viogetbuf(VIOQueue *q, int wait)
qlock(q);
waitloop:
while(q->desc == nil || (gidx = GET16(q->avail, 2), gidx == q->availidx)){
while((q->d->devstat & DRIVEROK) == 0 || q->desc == nil || (gidx = GET16(q->avail, 2), gidx == q->availidx)){
if(!wait){
qunlock(q);
return nil;
@ -151,6 +156,7 @@ waitloop:
}
q->availidx++;
if(rb == nil) goto waitloop;
q->livebuf++;
qunlock(q);
return rb;
}
@ -165,6 +171,10 @@ vioputbuf(VIOBuf *b)
if(b == nil) return;
q = b->qu;
qlock(q);
if((q->d->devstat & DRIVEROK) == 0){
qunlock(q);
goto end;
}
if(q->used == nil)
vmerror("virtio device %#x: address was set to an invalid value while holding buffer", q->d->pci->bdf);
else{
@ -173,9 +183,12 @@ vioputbuf(VIOBuf *b)
PUT32(p, 0, b->idx);
PUT16(q->used, 2, ++q->usedidx);
}
if(--q->livebuf <= 0)
rwakeup(&q->livebufrend);
qunlock(q);
if(q->avail != nil && (GET16(q->avail, 0) & USEDNOIRQ) == 0)
vioirq(q->d, 1);
end:
while(b != nil){
bn = b->next;
free(b);
@ -292,6 +305,29 @@ vioqaddrset(VIOQueue *q, u64int addr)
qunlock(q);
}
static void
viodevstatset(VIODev *v, u32int val)
{
int i;
v->devstat = val;
if(val == 0){
if(v->reset != nil)
v->reset(v);
v->guestfeat = 0;
vioirq(v, 0);
for(i = 0; i < v->nqu; i++){
qlock(&v->qu[i]);
while(v->qu[i].livebuf > 0)
rsleep(&v->qu[i].livebufrend);
qunlock(&v->qu[i]);
}
}else{
for(i = 0; i < v->nqu; i++)
v->qu[i].notify(&v->qu[i]);
}
}
u32int
vioio(int isin, u16int port, u32int val, int sz, void *vp)
{
@ -305,7 +341,7 @@ vioio(int isin, u16int port, u32int val, int sz, void *vp)
case 0x8: if(v->qsel < v->nqu) vioqaddrset(&v->qu[v->qsel], val); return 0;
case 0xe: v->qsel = val; return 0;
case 0x10: if(val < v->nqu) v->qu[val].notify(&v->qu[val]); return 0;
case 0x12: v->devstat = val; return 0;
case 0x12: viodevstatset(v, val); return 0;
case 0x10000: return v->devfeat;
case 0x10004: return v->guestfeat;
case 0x10008: return v->qsel >= v->nqu ? 0 : v->qu[v->qsel].addr;
@ -353,6 +389,7 @@ mkvioqueue(VIODev *d, int sz, void (*fn)(VIOQueue*))
q = d->qu + d->nqu++;
memset(q, 0, sizeof(VIOQueue));
q->Rendez.l = q;
q->livebufrend.l = q;
q->size = sz;
q->d = d;
q->notify = fn;
@ -475,7 +512,7 @@ vionetwproc(void *vp)
continue;
}
if(rc < len){
vmerror("write(vionetwproc): incomplete write");
vmerror("write(vionetwproc): incomplete write (%d < %d)", rc, len);
continue;
}
}
@ -562,6 +599,14 @@ vionetcmd(VIOQueue *q)
}
}
void
vionetreset(VIODev *d)
{
d->net.flags = 0;
d->net.macbloom = 0;
d->net.multibloom = 0;
}
int
mkvionet(char *net)
{
@ -581,6 +626,7 @@ mkvionet(char *net)
d->net.mac[0] = d->net.mac[0] & ~1 | 2;
d->devfeat = 1<<5|1<<16|1<<17|1<<18|1<<20;
d->io = vionetio;
d->reset = vionetreset;
d->net.readfd = d->net.writefd = fd;
proccreate(vionetrproc, d, 8192);
proccreate(vionetwproc, d, 8192);