struct kbdfront_dev *init_kbdfront(char *_nodename, int abs_pointer)
{
xenbus_transaction_t xbt;
char* err;
char* message=NULL;
struct xenkbd_page *s;
int retry=0;
char* msg = NULL;
char* nodename = _nodename ? _nodename : "device/vkbd/0";
struct kbdfront_dev *dev;
char path[strlen(nodename) + strlen("/backend-id") + 1];
printk("******************* KBDFRONT for %s **********\n\n\n", nodename);
dev = malloc(sizeof(*dev));
memset(dev, 0, sizeof(*dev));
dev->nodename = strdup(nodename);
#ifdef HAVE_LIBC
dev->fd = -1;
#endif
snprintf(path, sizeof(path), "%s/backend-id", nodename);
dev->dom = xenbus_read_integer(path);
evtchn_alloc_unbound(dev->dom, kbdfront_handler, dev, &dev->evtchn);
dev->page = s = (struct xenkbd_page*) alloc_page();
memset(s,0,PAGE_SIZE);
dev->events = NULL;
s->in_cons = s->in_prod = 0;
s->out_cons = s->out_prod = 0;
again:
err = xenbus_transaction_start(&xbt);
if (err) {
printk("starting transaction\n");
free(err);
}
err = xenbus_printf(xbt, nodename, "page-ref","%lu", virt_to_mfn(s));
if (err) {
message = "writing page-ref";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename, "event-channel", "%u", dev->evtchn);
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
if (abs_pointer) {
err = xenbus_printf(xbt, nodename, "request-abs-pointer", "1");
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
}
snprintf(path, sizeof(path), "%s/state", nodename);
err = xenbus_switch_state(xbt, path, XenbusStateInitialised);
if (err) {
printk("error writing initialized: %s\n", err);
free(err);
}
err = xenbus_transaction_end(xbt, 0, &retry);
free(err);
if (retry) {
goto again;
printk("completing transaction\n");
}
goto done;
abort_transaction:
free(err);
err = xenbus_transaction_end(xbt, 1, &retry);
printk("Abort transaction %s\n", message);
goto error;
done:
snprintf(path, sizeof(path), "%s/backend", nodename);
msg = xenbus_read(XBT_NIL, path, &dev->backend);
if (msg) {
printk("Error %s when reading the backend path %s\n", msg, path);
goto error;
}
printk("backend at %s\n", dev->backend);
{
XenbusState state;
char path[strlen(dev->backend) + strlen("/state") + 1];
char frontpath[strlen(nodename) + strlen("/state") + 1];
snprintf(path, sizeof(path), "%s/state", dev->backend);
xenbus_watch_path_token(XBT_NIL, path, path, &dev->events);
err = NULL;
state = xenbus_read_integer(path);
while (err == NULL && state < XenbusStateConnected)
err = xenbus_wait_for_state_change(path, &state, &dev->events);
if (state != XenbusStateConnected) {
printk("backend not available, state=%d\n", state);
free(err);
err = xenbus_unwatch_path_token(XBT_NIL, path, path);
goto error;
}
printk("%s connected\n", dev->backend);
snprintf(frontpath, sizeof(frontpath), "%s/state", nodename);
if((err = xenbus_switch_state(XBT_NIL, frontpath, XenbusStateConnected))
!= NULL) {
printk("error switching state: %s\n", err);
free(err);
err = xenbus_unwatch_path_token(XBT_NIL, path, path);
goto error;
}
}
unmask_evtchn(dev->evtchn);
printk("************************** KBDFRONT\n");
return dev;
error:
free(msg);
free(err);
free_kbdfront(dev);
return NULL;
}
struct pcifront_dev *init_pcifront(char *_nodename)
{
xenbus_transaction_t xbt;
char* err;
char* message=NULL;
int retry=0;
char* msg = NULL;
char* nodename = _nodename ? _nodename : "device/pci/0";
int dom;
struct pcifront_dev *dev;
char path[strlen(nodename) + strlen("/backend-id") + 1];
if (!_nodename && pcidev)
return pcidev;
printk("******************* PCIFRONT for %s **********\n\n\n", nodename);
snprintf(path, sizeof(path), "%s/backend-id", nodename);
dom = xenbus_read_integer(path);
if (dom == -1) {
printk("no backend\n");
return NULL;
}
dev = malloc(sizeof(*dev));
memset(dev, 0, sizeof(*dev));
dev->nodename = strdup(nodename);
dev->dom = dom;
evtchn_alloc_unbound(dev->dom, pcifront_handler, dev, &dev->evtchn);
dev->info = (struct xen_pci_sharedinfo*) alloc_page();
memset(dev->info,0,PAGE_SIZE);
dev->info_ref = gnttab_grant_access(dev->dom,virt_to_mfn(dev->info),0);
dev->events = NULL;
again:
err = xenbus_transaction_start(&xbt);
if (err) {
printk("starting transaction\n");
free(err);
}
err = xenbus_printf(xbt, nodename, "pci-op-ref","%u",
dev->info_ref);
if (err) {
message = "writing pci-op-ref";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename,
"event-channel", "%u", dev->evtchn);
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename,
"magic", XEN_PCI_MAGIC);
if (err) {
message = "writing magic";
goto abort_transaction;
}
snprintf(path, sizeof(path), "%s/state", nodename);
err = xenbus_switch_state(xbt, path, XenbusStateInitialised);
if (err) {
message = "switching state";
goto abort_transaction;
}
err = xenbus_transaction_end(xbt, 0, &retry);
free(err);
if (retry) {
goto again;
printk("completing transaction\n");
}
goto done;
abort_transaction:
free(err);
err = xenbus_transaction_end(xbt, 1, &retry);
printk("Abort transaction %s\n", message);
goto error;
done:
snprintf(path, sizeof(path), "%s/backend", nodename);
msg = xenbus_read(XBT_NIL, path, &dev->backend);
if (msg) {
printk("Error %s when reading the backend path %s\n", msg, path);
goto error;
}
printk("backend at %s\n", dev->backend);
{
char path[strlen(dev->backend) + strlen("/state") + 1];
char frontpath[strlen(nodename) + strlen("/state") + 1];
XenbusState state;
snprintf(path, sizeof(path), "%s/state", dev->backend);
xenbus_watch_path_token(XBT_NIL, path, path, &dev->events);
err = NULL;
state = xenbus_read_integer(path);
while (err == NULL && state < XenbusStateConnected)
err = xenbus_wait_for_state_change(path, &state, &dev->events);
if (state != XenbusStateConnected) {
printk("backend not avalable, state=%d\n", state);
free(err);
err = xenbus_unwatch_path_token(XBT_NIL, path, path);
goto error;
}
snprintf(frontpath, sizeof(frontpath), "%s/state", nodename);
if ((err = xenbus_switch_state(XBT_NIL, frontpath, XenbusStateConnected))
!= NULL) {
printk("error switching state %s\n", err);
free(err);
err = xenbus_unwatch_path_token(XBT_NIL, path, path);
goto error;
}
}
unmask_evtchn(dev->evtchn);
printk("**************************\n");
if (!_nodename)
pcidev = dev;
return dev;
error:
free(msg);
free(err);
free_pcifront(dev);
return NULL;
}
struct fbfront_dev *init_fbfront(char *_nodename, unsigned long *mfns, int width, int height, int depth, int stride, int n)
{
xenbus_transaction_t xbt;
char* err;
char* message=NULL;
struct xenfb_page *s;
int retry=0;
char* msg=NULL;
int i, j;
struct fbfront_dev *dev;
int max_pd;
unsigned long mapped;
char* nodename = _nodename ? _nodename : "device/vfb/0";
char path[strlen(nodename) + strlen("/backend-id") + 1];
printk("******************* FBFRONT for %s **********\n\n\n", nodename);
dev = malloc(sizeof(*dev));
memset(dev, 0, sizeof(*dev));
dev->nodename = strdup(nodename);
#ifdef HAVE_LIBC
dev->fd = -1;
#endif
snprintf(path, sizeof(path), "%s/backend-id", nodename);
dev->dom = xenbus_read_integer(path);
evtchn_alloc_unbound(dev->dom, fbfront_handler, dev, &dev->evtchn);
dev->page = s = (struct xenfb_page*) alloc_page();
memset(s,0,PAGE_SIZE);
s->in_cons = s->in_prod = 0;
s->out_cons = s->out_prod = 0;
dev->width = s->width = width;
dev->height = s->height = height;
dev->depth = s->depth = depth;
dev->stride = s->line_length = stride;
dev->mem_length = s->mem_length = n * PAGE_SIZE;
dev->offset = 0;
dev->events = NULL;
max_pd = sizeof(s->pd) / sizeof(s->pd[0]);
mapped = 0;
for (i = 0; mapped < n && i < max_pd; i++) {
unsigned long *pd = (unsigned long *) alloc_page();
for (j = 0; mapped < n && j < PAGE_SIZE / sizeof(unsigned long); j++)
pd[j] = mfns[mapped++];
for ( ; j < PAGE_SIZE / sizeof(unsigned long); j++)
pd[j] = 0;
s->pd[i] = virt_to_mfn(pd);
}
for ( ; i < max_pd; i++)
s->pd[i] = 0;
again:
err = xenbus_transaction_start(&xbt);
if (err) {
printk("starting transaction\n");
free(err);
}
err = xenbus_printf(xbt, nodename, "page-ref","%lu", virt_to_mfn(s));
if (err) {
message = "writing page-ref";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename, "event-channel", "%u", dev->evtchn);
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename, "protocol", "%s",
XEN_IO_PROTO_ABI_NATIVE);
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename, "feature-update", "1");
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
snprintf(path, sizeof(path), "%s/state", nodename);
err = xenbus_switch_state(xbt, path, XenbusStateInitialised);
if (err) {
message = "switching state";
goto abort_transaction;
}
err = xenbus_transaction_end(xbt, 0, &retry);
free(err);
if (retry) {
goto again;
printk("completing transaction\n");
}
goto done;
abort_transaction:
free(err);
err = xenbus_transaction_end(xbt, 1, &retry);
printk("Abort transaction %s\n", message);
goto error;
done:
snprintf(path, sizeof(path), "%s/backend", nodename);
msg = xenbus_read(XBT_NIL, path, &dev->backend);
if (msg) {
printk("Error %s when reading the backend path %s\n", msg, path);
goto error;
}
printk("backend at %s\n", dev->backend);
{
XenbusState state;
char path[strlen(dev->backend) + strlen("/request-update") + 1];
char frontpath[strlen(nodename) + strlen("/state") + 1];
snprintf(path, sizeof(path), "%s/state", dev->backend);
xenbus_watch_path_token(XBT_NIL, path, path, &dev->events);
err = NULL;
state = xenbus_read_integer(path);
while (err == NULL && state < XenbusStateConnected)
err = xenbus_wait_for_state_change(path, &state, &dev->events);
if (state != XenbusStateConnected) {
printk("backend not available, state=%d\n", state);
free(err);
err = xenbus_unwatch_path_token(XBT_NIL, path, path);
goto error;
}
printk("%s connected\n", dev->backend);
snprintf(path, sizeof(path), "%s/request-update", dev->backend);
dev->request_update = xenbus_read_integer(path);
snprintf(frontpath, sizeof(frontpath), "%s/state", nodename);
if ((err = xenbus_switch_state(XBT_NIL, frontpath, XenbusStateConnected))
!= NULL) {
printk("error switching state: %s\n", err);
free(err);
err = xenbus_unwatch_path_token(XBT_NIL, path, path);
goto error;
}
}
unmask_evtchn(dev->evtchn);
printk("************************** FBFRONT\n");
return dev;
error:
free(msg);
free(err);
free_fbfront(dev);
return NULL;
}
struct blkfront_dev *init_blkfront(char *_nodename, struct blkfront_info *info)
{
xenbus_transaction_t xbt;
char* err;
char* message=NULL;
struct blkif_sring *s;
int retry=0;
char* msg = NULL;
char* c;
char* nodename = _nodename ? _nodename : "device/vbd/768";
struct blkfront_dev *dev;
char path[strlen(nodename) + strlen("/backend-id") + 1];
printk("******************* BLKFRONT for %s **********\n\n\n", nodename);
dev = malloc(sizeof(*dev));
memset(dev, 0, sizeof(*dev));
dev->nodename = strdup(nodename);
#ifdef HAVE_LIBC
dev->fd = -1;
#endif
snprintf(path, sizeof(path), "%s/backend-id", nodename);
dev->dom = xenbus_read_integer(path);
evtchn_alloc_unbound(dev->dom, blkfront_handler, dev, &dev->evtchn);
s = (struct blkif_sring*) alloc_page();
memset(s,0,PAGE_SIZE);
SHARED_RING_INIT(s);
FRONT_RING_INIT(&dev->ring, s, PAGE_SIZE);
dev->ring_ref = gnttab_grant_access(dev->dom,virt_to_mfn(s),0);
dev->events = NULL;
again:
err = xenbus_transaction_start(&xbt);
if (err) {
printk("starting transaction\n");
free(err);
}
err = xenbus_printf(xbt, nodename, "ring-ref","%u",
dev->ring_ref);
if (err) {
message = "writing ring-ref";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename,
"event-channel", "%u", dev->evtchn);
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename,
"protocol", "%s", XEN_IO_PROTO_ABI_NATIVE);
if (err) {
message = "writing protocol";
goto abort_transaction;
}
snprintf(path, sizeof(path), "%s/state", nodename);
err = xenbus_switch_state(xbt, path, XenbusStateConnected);
if (err) {
message = "switching state";
goto abort_transaction;
}
err = xenbus_transaction_end(xbt, 0, &retry);
free(err);
if (retry) {
goto again;
printk("completing transaction\n");
}
goto done;
abort_transaction:
free(err);
err = xenbus_transaction_end(xbt, 1, &retry);
printk("Abort transaction %s\n", message);
goto error;
done:
snprintf(path, sizeof(path), "%s/backend", nodename);
msg = xenbus_read(XBT_NIL, path, &dev->backend);
if (msg) {
printk("Error %s when reading the backend path %s\n", msg, path);
goto error;
}
printk("backend at %s\n", dev->backend);
dev->handle = strtoul(strrchr(nodename, '/')+1, NULL, 0);
{
XenbusState state;
char path[strlen(dev->backend) + strlen("/feature-flush-cache") + 1];
snprintf(path, sizeof(path), "%s/mode", dev->backend);
msg = xenbus_read(XBT_NIL, path, &c);
if (msg) {
printk("Error %s when reading the mode\n", msg);
goto error;
}
if (*c == 'w')
dev->info.mode = O_RDWR;
else
dev->info.mode = O_RDONLY;
free(c);
snprintf(path, sizeof(path), "%s/state", dev->backend);
xenbus_watch_path_token(XBT_NIL, path, path, &dev->events);
msg = NULL;
state = xenbus_read_integer(path);
while (msg == NULL && state < XenbusStateConnected)
msg = xenbus_wait_for_state_change(path, &state, &dev->events);
if (msg != NULL || state != XenbusStateConnected) {
printk("backend not available, state=%d\n", state);
xenbus_unwatch_path_token(XBT_NIL, path, path);
goto error;
}
snprintf(path, sizeof(path), "%s/info", dev->backend);
dev->info.info = xenbus_read_integer(path);
snprintf(path, sizeof(path), "%s/sectors", dev->backend);
// FIXME: read_integer returns an int, so disk size limited to 1TB for now
dev->info.sectors = xenbus_read_integer(path);
snprintf(path, sizeof(path), "%s/sector-size", dev->backend);
dev->info.sector_size = xenbus_read_integer(path);
snprintf(path, sizeof(path), "%s/feature-barrier", dev->backend);
dev->info.barrier = xenbus_read_integer(path);
snprintf(path, sizeof(path), "%s/feature-flush-cache", dev->backend);
dev->info.flush = xenbus_read_integer(path);
*info = dev->info;
}
unmask_evtchn(dev->evtchn);
printk("%u sectors of %u bytes\n", dev->info.sectors, dev->info.sector_size);
printk("**************************\n");
return dev;
error:
free(msg);
free(err);
free_blkfront(dev);
return NULL;
}
struct netfront_dev *init_netfront(char *_nodename, void (*thenetif_rx)(unsigned char* data, int len), unsigned char rawmac[6], char **ip)
{
xenbus_transaction_t xbt;
char* err;
char* message=NULL;
struct netif_tx_sring *txs;
struct netif_rx_sring *rxs;
int retry=0;
int i;
char* msg = NULL;
char nodename[256];
char path[256];
struct netfront_dev *dev;
if (!_nodename)
snprintf(nodename, sizeof(nodename), "device/vif/%d", netfrontends);
else {
strncpy(nodename, _nodename, sizeof(nodename) - 1);
nodename[sizeof(nodename) - 1] = 0;
}
netfrontends++;
if (!thenetif_rx)
thenetif_rx = netif_rx;
#ifdef CONFIG_FRONT
printk("************************ NETFRONT for %s **********\n\n", nodename);
#endif
dev = malloc(sizeof(*dev));
memset(dev, 0, sizeof(*dev));
dev->nodename = strdup(nodename);
#ifdef HAVE_LIBC
dev->fd = -1;
#endif
#ifdef CONFIG_FRONT
printk("net TX ring size %d\n", NET_TX_RING_SIZE);
printk("net RX ring size %d\n", NET_RX_RING_SIZE);
#endif
init_SEMAPHORE(&dev->tx_sem, NET_TX_RING_SIZE);
for(i=0;i<NET_TX_RING_SIZE;i++)
{
add_id_to_freelist(i,dev->tx_freelist);
dev->tx_buffers[i].page = NULL;
}
for(i=0;i<NET_RX_RING_SIZE;i++)
{
/* TODO: that's a lot of memory */
dev->rx_buffers[i].page = (char*)alloc_page();
}
snprintf(path, sizeof(path), "%s/backend-id", nodename);
dev->dom = xenbus_read_integer(path);
#ifdef HAVE_LIBC
if (thenetif_rx == NETIF_SELECT_RX)
evtchn_alloc_unbound(dev->dom, netfront_select_handler, dev, &dev->evtchn);
else
#endif
evtchn_alloc_unbound(dev->dom, netfront_handler, dev, &dev->evtchn);
txs = (struct netif_tx_sring *) alloc_page();
rxs = (struct netif_rx_sring *) alloc_page();
memset(txs,0,PAGE_SIZE);
memset(rxs,0,PAGE_SIZE);
SHARED_RING_INIT(txs);
SHARED_RING_INIT(rxs);
FRONT_RING_INIT(&dev->tx, txs, PAGE_SIZE);
FRONT_RING_INIT(&dev->rx, rxs, PAGE_SIZE);
dev->tx_ring_ref = gnttab_grant_access(dev->dom,virt_to_mfn(txs),0);
dev->rx_ring_ref = gnttab_grant_access(dev->dom,virt_to_mfn(rxs),0);
init_rx_buffers(dev);
dev->netif_rx = thenetif_rx;
dev->events = NULL;
again:
err = xenbus_transaction_start(&xbt);
if (err) {
printk("starting transaction\n");
free(err);
}
err = xenbus_printf(xbt, nodename, "tx-ring-ref","%u",
dev->tx_ring_ref);
//printk("node = %s\n", nodename);
if (err) {
message = "writing tx ring-ref";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename, "rx-ring-ref","%u",
dev->rx_ring_ref);
if (err) {
message = "writing rx ring-ref";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename,
"event-channel", "%u", dev->evtchn);
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename, "request-rx-copy", "%u", 1);
if (err) {
message = "writing request-rx-copy";
goto abort_transaction;
}
snprintf(path, sizeof(path), "%s/state", nodename);
err = xenbus_switch_state(xbt, path, XenbusStateConnected);
if (err) {
message = "switching state";
goto abort_transaction;
}
err = xenbus_transaction_end(xbt, 0, &retry);
free(err);
if (retry) {
goto again;
printk("completing transaction\n");
}
goto done;
abort_transaction:
free(err);
err = xenbus_transaction_end(xbt, 1, &retry);
printk("Abort transaction %s\n", message);
goto error;
done:
snprintf(path, sizeof(path), "%s/backend", nodename);
msg = xenbus_read(XBT_NIL, path, &dev->backend);
snprintf(path, sizeof(path), "%s/mac", nodename);
msg = xenbus_read(XBT_NIL, path, &dev->mac);
if ((dev->backend == NULL) || (dev->mac == NULL)) {
printk("%s: backend/mac failed\n", __func__);
goto error;
}
#ifdef CONFIG_FRONT
printk("backend at %s\n",dev->backend);
printk("mac is %s\n",dev->mac);
#endif
{
XenbusState state;
char path[strlen(dev->backend) + strlen("/state") + 1];
snprintf(path, sizeof(path), "%s/state", dev->backend);
xenbus_watch_path_token(XBT_NIL, path, path, &dev->events);
err = NULL;
state = xenbus_read_integer(path);
while (err == NULL && state < XenbusStateConnected)
err = xenbus_wait_for_state_change(path, &state, &dev->events);
if (state != XenbusStateConnected) {
printk("backend not avalable, state=%d\n", state);
xenbus_unwatch_path_token(XBT_NIL, path, path);
goto error;
}
if (ip) {
snprintf(path, sizeof(path), "%s/ip", dev->backend);
xenbus_read(XBT_NIL, path, ip);
}
}
#ifdef CONFIG_FRONT
printk("**************************\n");
#endif
unmask_evtchn(dev->evtchn);
/* Special conversion specifier 'hh' needed for __ia64__. Without
this mini-os panics with 'Unaligned reference'. */
if (rawmac){
sscanf(dev->mac,"%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
&rawmac[0],&rawmac[1],&rawmac[2],
&rawmac[3],&rawmac[4],&rawmac[5]);
/*printf("MAC:%02x:%02x:%02x:%02x:%02x:%02x\n",
rawmac[0],rawmac[1],rawmac[2],
rawmac[3],rawmac[4],rawmac[5]);*/
}
return dev;
error:
free(msg);
free(err);
free_netfront(dev);
return NULL;
}
int xc_evtchn_unmask(int xce_handle, evtchn_port_t port)
{
unmask_evtchn(port);
return 0;
}
struct consfront_dev *init_consfront(char *_nodename)
{
xenbus_transaction_t xbt;
char* err;
char* message=NULL;
int retry=0;
char* msg = NULL;
char nodename[256];
char path[256];
static int consfrontends = 3;
struct consfront_dev *dev;
int res;
if (!_nodename)
snprintf(nodename, sizeof(nodename), "device/console/%d", consfrontends);
else
strncpy(nodename, _nodename, sizeof(nodename));
printk("******************* CONSFRONT for %s **********\n\n\n", nodename);
consfrontends++;
dev = malloc(sizeof(*dev));
memset(dev, 0, sizeof(*dev));
dev->nodename = strdup(nodename);
#ifdef HAVE_LIBC
dev->fd = -1;
#endif
snprintf(path, sizeof(path), "%s/backend-id", nodename);
if ((res = xenbus_read_integer(path)) < 0)
return NULL;
else
dev->dom = res;
evtchn_alloc_unbound(dev->dom, handle_input, dev, &dev->evtchn);
dev->ring = (struct xencons_interface *) alloc_page();
memset(dev->ring, 0, PAGE_SIZE);
dev->ring_ref = gnttab_grant_access(dev->dom, virt_to_mfn(dev->ring), 0);
dev->events = NULL;
again:
err = xenbus_transaction_start(&xbt);
if (err) {
printk("starting transaction\n");
free(err);
}
err = xenbus_printf(xbt, nodename, "ring-ref","%u",
dev->ring_ref);
if (err) {
message = "writing ring-ref";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename,
"port", "%u", dev->evtchn);
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename,
"protocol", "%s", XEN_IO_PROTO_ABI_NATIVE);
if (err) {
message = "writing protocol";
goto abort_transaction;
}
err = xenbus_printf(xbt, nodename, "type", "%s", "ioemu");
if (err) {
message = "writing type";
goto abort_transaction;
}
snprintf(path, sizeof(path), "%s/state", nodename);
err = xenbus_switch_state(xbt, path, XenbusStateConnected);
if (err) {
message = "switching state";
goto abort_transaction;
}
err = xenbus_transaction_end(xbt, 0, &retry);
if (err) free(err);
if (retry) {
goto again;
printk("completing transaction\n");
}
goto done;
abort_transaction:
free(err);
err = xenbus_transaction_end(xbt, 1, &retry);
printk("Abort transaction %s\n", message);
goto error;
done:
snprintf(path, sizeof(path), "%s/backend", nodename);
msg = xenbus_read(XBT_NIL, path, &dev->backend);
if (msg) {
printk("Error %s when reading the backend path %s\n", msg, path);
goto error;
}
printk("backend at %s\n", dev->backend);
{
XenbusState state;
char path[strlen(dev->backend) + 1 + 19 + 1];
snprintf(path, sizeof(path), "%s/state", dev->backend);
xenbus_watch_path_token(XBT_NIL, path, path, &dev->events);
msg = NULL;
state = xenbus_read_integer(path);
while (msg == NULL && state < XenbusStateConnected)
msg = xenbus_wait_for_state_change(path, &state, &dev->events);
if (msg != NULL || state != XenbusStateConnected) {
printk("backend not available, state=%d\n", state);
xenbus_unwatch_path_token(XBT_NIL, path, path);
goto error;
}
}
unmask_evtchn(dev->evtchn);
printk("**************************\n");
return dev;
error:
free(msg);
free(err);
free_consfront(dev);
return NULL;
}
void irq_resume(void)
{
struct evtchn_bind_virq bind_virq;
struct evtchn_bind_ipi bind_ipi;
int cpu, pirq, virq, ipi, irq, evtchn;
init_evtchn_cpu_bindings();
/* New event-channel space is not 'live' yet. */
for (evtchn = 0; evtchn < NR_EVENT_CHANNELS; evtchn++)
mask_evtchn(evtchn);
/* Check that no PIRQs are still bound. */
for (pirq = 0; pirq < NR_PIRQS; pirq++)
BUG_ON(irq_info[pirq_to_irq(pirq)] != IRQ_UNBOUND);
/* Secondary CPUs must have no VIRQ or IPI bindings. */
for (cpu = 1; cpu < NR_CPUS; cpu++) {
for (virq = 0; virq < NR_VIRQS; virq++)
BUG_ON(per_cpu(virq_to_irq, cpu)[virq] != -1);
for (ipi = 0; ipi < NR_IPIS; ipi++)
BUG_ON(per_cpu(ipi_to_irq, cpu)[ipi] != -1);
}
/* No IRQ <-> event-channel mappings. */
for (irq = 0; irq < NR_IRQS; irq++)
irq_info[irq] &= ~0xFFFF; /* zap event-channel binding */
for (evtchn = 0; evtchn < NR_EVENT_CHANNELS; evtchn++)
evtchn_to_irq[evtchn] = -1;
/* Primary CPU: rebind VIRQs automatically. */
for (virq = 0; virq < NR_VIRQS; virq++) {
if ((irq = per_cpu(virq_to_irq, 0)[virq]) == -1)
continue;
BUG_ON(irq_info[irq] != mk_irq_info(IRQT_VIRQ, virq, 0));
/* Get a new binding from Xen. */
bind_virq.virq = virq;
bind_virq.vcpu = 0;
if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
&bind_virq) != 0)
BUG();
evtchn = bind_virq.port;
/* Record the new mapping. */
evtchn_to_irq[evtchn] = irq;
irq_info[irq] = mk_irq_info(IRQT_VIRQ, virq, evtchn);
/* Ready for use. */
unmask_evtchn(evtchn);
}
/* Primary CPU: rebind IPIs automatically. */
for (ipi = 0; ipi < NR_IPIS; ipi++) {
if ((irq = per_cpu(ipi_to_irq, 0)[ipi]) == -1)
continue;
BUG_ON(irq_info[irq] != mk_irq_info(IRQT_IPI, ipi, 0));
/* Get a new binding from Xen. */
bind_ipi.vcpu = 0;
if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
&bind_ipi) != 0)
BUG();
evtchn = bind_ipi.port;
/* Record the new mapping. */
evtchn_to_irq[evtchn] = irq;
irq_info[irq] = mk_irq_info(IRQT_IPI, ipi, evtchn);
/* Ready for use. */
unmask_evtchn(evtchn);
}
}