static int tpmfront_connect(struct tpmfront_dev* dev)
{
char* err;
/* Create shared page */
dev->page = (vtpm_shared_page_t*) alloc_page();
if(dev->page == NULL) {
TPMFRONT_ERR("Unable to allocate page for shared memory\n");
goto error;
}
memset(dev->page, 0, PAGE_SIZE);
dev->ring_ref = gnttab_grant_access(dev->bedomid, virt_to_mfn(dev->page), 0);
TPMFRONT_DEBUG("grant ref is %lu\n", (unsigned long) dev->ring_ref);
/*Create event channel */
if(evtchn_alloc_unbound(dev->bedomid, tpmfront_handler, dev, &dev->evtchn)) {
TPMFRONT_ERR("Unable to allocate event channel\n");
goto error_postmap;
}
unmask_evtchn(dev->evtchn);
TPMFRONT_DEBUG("event channel is %lu\n", (unsigned long) dev->evtchn);
/* Write the entries to xenstore */
if(publish_xenbus(dev)) {
goto error_postevtchn;
}
/* Change state to connected */
dev->state = XenbusStateConnected;
/* Tell the backend that we are ready */
if((err = xenbus_printf(XBT_NIL, dev->nodename, "state", "%u", dev->state))) {
TPMFRONT_ERR("Unable to write to xenstore %s/state, value=%u", dev->nodename, XenbusStateConnected);
free(err);
goto error;
}
return 0;
error_postevtchn:
mask_evtchn(dev->evtchn);
unbind_evtchn(dev->evtchn);
error_postmap:
gnttab_end_access(dev->ring_ref);
free_page(dev->page);
error:
return -1;
}
evtchn_port_or_error_t xc_evtchn_bind_unbound_port(int xce_handle, int domid)
{
int ret, i;
evtchn_port_t port;
assert(get_current() == main_thread);
i = port_alloc(xce_handle);
if (i == -1)
return -1;
printf("xc_evtchn_bind_unbound_port(%d)", domid);
ret = evtchn_alloc_unbound(domid, evtchn_handler, (void*)(intptr_t)xce_handle, &port);
printf(" = %d\n", ret);
if (ret < 0) {
errno = -ret;
return -1;
}
files[xce_handle].evtchn.ports[i].bound = 1;
files[xce_handle].evtchn.ports[i].port = port;
unmask_evtchn(port);
return port;
}
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 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) + 1 + 10 + 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 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;
char* nodename = _nodename ? _nodename : "device/vkbd/0";
struct kbdfront_dev *dev;
char path[strlen(nodename) + 1 + 10 + 1];
printk("******************* KBDFRONT for %s **********\n\n\n", nodename);
dev = malloc(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");
}
err = xenbus_printf(xbt, nodename, "page-ref","%u", 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;
}
}
err = xenbus_printf(xbt, nodename, "state", "%u", 3); /* initialized */
if (err)
printk("error writing initialized: %s\n", err);
err = xenbus_transaction_end(xbt, 0, &retry);
if (retry) {
goto again;
printk("completing transaction\n");
}
goto done;
abort_transaction:
xenbus_transaction_end(xbt, 1, &retry);
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) + 1 + 6 + 1];
snprintf(path, sizeof(path), "%s/state", dev->backend);
xenbus_watch_path_token(XBT_NIL, path, path, &dev->events);
xenbus_wait_for_value(path, "4", &dev->events);
printk("%s connected\n", dev->backend);
err = xenbus_printf(XBT_NIL, nodename, "state", "%u", 4); /* connected */
}
unmask_evtchn(dev->evtchn);
printk("************************** KBDFRONT\n");
return dev;
error:
free_kbdfront(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;
char nodename[256];
char path[256];
struct netfront_dev *dev;
static int netfrontends = 0;
if (!_nodename)
snprintf(nodename, sizeof(nodename), "device/vif/%d", netfrontends);
else
strncpy(nodename, _nodename, strlen(nodename));
netfrontends++;
if (!thenetif_rx)
thenetif_rx = netif_rx;
printk("************************ NETFRONT 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
printk("net TX ring size %d\n", NET_TX_RING_SIZE);
printk("net RX ring size %d\n", NET_RX_RING_SIZE);
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");
}
err = xenbus_printf(xbt, nodename, "tx-ring-ref","%u",
dev->tx_ring_ref);
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);
if (retry) {
goto again;
printk("completing transaction\n");
}
goto done;
abort_transaction:
xenbus_transaction_end(xbt, 1, &retry);
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;
}
printk("backend at %s\n",dev->backend);
printk("mac is %s\n",dev->mac);
{
XenbusState state;
char path[strlen(dev->backend) + 1 + 5 + 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(XBT_NIL, path);
goto error;
}
if (ip) {
snprintf(path, sizeof(path), "%s/ip", dev->backend);
xenbus_read(XBT_NIL, path, ip);
}
}
printk("**************************\n");
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]);
return dev;
error:
free_netfront(dev);
return NULL;
}
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);
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;
}
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("%lu sectors of %u bytes\n", (unsigned long) dev->info.sectors, dev->info.sector_size);
printk("**************************\n");
return dev;
error:
free(msg);
free(err);
free_blkfront(dev);
return NULL;
}
static struct netfront_dev *_init_netfront(struct netfront_dev *dev,
unsigned char rawmac[6],
char **ip)
{
xenbus_transaction_t xbt;
char* err = NULL;
const char* message=NULL;
struct netif_tx_sring *txs;
struct netif_rx_sring *rxs;
int feature_split_evtchn;
int retry=0;
int i;
char* msg = NULL;
char path[256];
snprintf(path, sizeof(path), "%s/backend-id", dev->nodename);
dev->dom = xenbus_read_integer(path);
snprintf(path, sizeof(path), "%s/backend", dev->nodename);
msg = xenbus_read(XBT_NIL, path, &dev->backend);
snprintf(path, sizeof(path), "%s/mac", dev->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_NETMAP
snprintf(path, sizeof(path), "%s/feature-netmap", dev->backend);
dev->netmap = xenbus_read_integer(path) > 0 ? 1 : 0;
if (dev->netmap) {
dev->na = init_netfront_netmap(dev, dev->netif_rx);
goto skip;
}
#endif
/* Check feature-split-event-channels */
snprintf(path, sizeof(path), "%s/feature-split-event-channels",
dev->backend);
feature_split_evtchn = xenbus_read_integer(path) > 0 ? 1 : 0;
#ifdef HAVE_LIBC
/* Force the use of a single event channel */
if (dev->netif_rx == NETIF_SELECT_RX)
feature_split_evtchn = 0;
#endif
printk("************************ NETFRONT for %s **********\n\n\n",
dev->nodename);
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);
#if defined CONFIG_NETFRONT_PERSISTENT_GRANTS || !defined CONFIG_NETFRONT_LWIP_ONLY
dev->tx_buffers[i].page = (void*)alloc_page();
BUG_ON(dev->tx_buffers[i].page == NULL);
#ifdef CONFIG_NETFRONT_PERSISTENT_GRANTS
dev->tx_buffers[i].gref = gnttab_grant_access(dev->dom,
virt_to_mfn(dev->tx_buffers[i].page), 0);
BUG_ON(dev->tx_buffers[i].gref == GRANT_INVALID_REF);
dprintk("tx[%d]: page = %p, gref=0x%x\n", i, dev->tx_buffers[i].page, dev->tx_buffers[i].gref);
#endif
#endif
}
#if defined CONFIG_NETFRONT_PERSISTENT_GRANTS || !defined CONFIG_NETFRONT_LWIP_ONLY
printk("net TX ring size %d, %lu KB\n", NET_TX_RING_SIZE, (unsigned long)(NET_TX_RING_SIZE * PAGE_SIZE)/1024);
#else
printk("net TX ring size %d\n", NET_TX_RING_SIZE);
#endif
#ifdef CONFIG_NETFRONT_PERSISTENT_GRANTS
for(i=0;i<NET_RX_RING_SIZE;i++)
{
/* TODO: that's a lot of memory */
dev->rx_buffers[i].page = (void*)alloc_page();
BUG_ON(dev->rx_buffers[i].page == NULL);
dprintk("rx[%d]: page = %p\n", i, dev->rx_buffers[i].page);
}
printk("net RX ring size %d, %lu KB\n", NET_RX_RING_SIZE, (unsigned long)(NET_RX_RING_SIZE * PAGE_SIZE)/1024);
#else
for(i=0;i<NET_RX_RING_SIZE;i++)
dev->rx_buffers[i] = NULL;
for(i=0;i<NET_RX_BUFFERS;i++)
{
/* allocate rx buffer pool */
dev->rx_buffer_pool[i].page = (void*)alloc_page();
BUG_ON(dev->rx_buffer_pool[i].page == NULL);
dprintk("rx[%d]: page = %p\n", i, dev->rx_buffer_pool[i].page);
add_id_to_freelist(i,dev->rx_freelist);
}
dev->rx_avail = NET_RX_BUFFERS;
printk("net RX ring size %d, %lu KB buffer space\n", NET_RX_RING_SIZE, (unsigned long)(NET_RX_BUFFERS * PAGE_SIZE)/1024);
#endif
if (feature_split_evtchn) {
evtchn_alloc_unbound(dev->dom, netfront_tx_handler, dev,
&dev->tx_evtchn);
evtchn_alloc_unbound(dev->dom, netfront_rx_handler, dev,
&dev->rx_evtchn);
printk("split event channels enabled\n");
} else {
#ifdef HAVE_LIBC
if (dev->netif_rx == NETIF_SELECT_RX)
evtchn_alloc_unbound(dev->dom, netfront_select_handler,
dev, &dev->tx_evtchn);
else
#endif
evtchn_alloc_unbound(dev->dom, netfront_handler,
dev, &dev->tx_evtchn);
dev->rx_evtchn = dev->tx_evtchn;
}
#ifdef CONFIG_NETFRONT_PERSISTENT_GRANTS
printk("persistent grants enabled\n");
#endif
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);
BUG_ON(dev->tx_ring_ref == GRANT_INVALID_REF);
dev->rx_ring_ref = gnttab_grant_access(dev->dom,virt_to_mfn(rxs),0);
BUG_ON(dev->rx_ring_ref == GRANT_INVALID_REF);
init_rx_buffers(dev);
dev->events = NULL;
again:
err = xenbus_transaction_start(&xbt);
if (err) {
printk("starting transaction\n");
free(err);
}
err = xenbus_printf(xbt, dev->nodename, "tx-ring-ref","%u",
dev->tx_ring_ref);
if (err) {
message = "writing tx ring-ref";
goto abort_transaction;
}
err = xenbus_printf(xbt, dev->nodename, "rx-ring-ref","%u",
dev->rx_ring_ref);
if (err) {
message = "writing rx ring-ref";
goto abort_transaction;
}
if (feature_split_evtchn) {
err = xenbus_printf(xbt, dev->nodename,
"event-channel-tx", "%u", dev->tx_evtchn);
if (err) {
message = "writing event-channel-tx";
goto abort_transaction;
}
err = xenbus_printf(xbt, dev->nodename,
"event-channel-rx", "%u", dev->rx_evtchn);
if (err) {
message = "writing event-channel-rx";
goto abort_transaction;
}
} else {
err = xenbus_printf(xbt, dev->nodename,
"event-channel", "%u", dev->tx_evtchn);
if (err) {
message = "writing event-channel";
goto abort_transaction;
}
}
err = xenbus_printf(xbt, dev->nodename, "feature-rx-notify", "%u", 1);
if (err) {
message = "writing feature-rx-notify";
goto abort_transaction;
}
#ifdef CONFIG_NETFRONT_PERSISTENT_GRANTS
err = xenbus_printf(xbt, dev->nodename, "feature-persistent", "%u", 1);
if (err) {
message = "writing feature-persistent";
goto abort_transaction;
}
#endif
err = xenbus_printf(xbt, dev->nodename, "request-rx-copy", "%u", 1);
if (err) {
message = "writing request-rx-copy";
goto abort_transaction;
}
#if defined(CONFIG_NETFRONT_GSO) && defined(HAVE_LWIP)
err = xenbus_printf(xbt, dev->nodename, "feature-sg", "%u", 1);
if (err) {
message = "writing feature-sg";
goto abort_transaction;
}
err = xenbus_printf(xbt, dev->nodename, "feature-gso-tcpv4", "%u", 1);
if (err) {
message = "writing feature-gso-tcpv4";
goto abort_transaction;
}
err = xenbus_printf(xbt, dev->nodename, "feature-gso-tcpv6", "%u", 1);
if (err) {
message = "writing feature-gso-tcpv6";
goto abort_transaction;
}
#endif
snprintf(path, sizeof(path), "%s/state", dev->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/mac", dev->nodename);
msg = xenbus_read(XBT_NIL, path, &dev->mac);
if (dev->mac == NULL) {
printk("%s: backend/mac failed\n", __func__);
goto error;
}
printk("backend at %s\n",dev->backend);
printk("mac is %s\n",dev->mac);
{
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);
}
}
printk("**************************\n");
unmask_evtchn(dev->tx_evtchn);
if (feature_split_evtchn)
unmask_evtchn(dev->rx_evtchn);
#ifdef CONFIG_NETMAP
skip:
if (dev->netmap)
connect_netfront(dev);
#endif
/* 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]);
#ifdef CONFIG_SELECT_POLL
dev->fd = alloc_fd(FTYPE_TAP);
files[dev->fd].read = 0;
#endif
#ifdef CONFIG_NETFRONT_STATS
netfront_reset_txcounters(dev);
#endif
return dev;
error:
free(msg);
free(err);
free_netfront(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;
}