/*
* Synchronous part of XPD detection.
* Called from xbus_poll()
*/
int create_xpd(xbus_t *xbus, const xproto_table_t *proto_table,
int unit,
int subunit,
byte type,
byte subtype,
int subunits,
byte port_dir)
{
xpd_t *xpd = NULL;
bool to_phone;
int ret = -EINVAL;
BUG_ON(type == XPD_TYPE_NOMODULE);
to_phone = BIT(subunit) & port_dir;
BUG_ON(!xbus);
xpd = xpd_byaddr(xbus, unit, subunit);
if(xpd) {
XPD_NOTICE(xpd, "XPD at %d%d already exists\n",
unit, subunit);
goto out;
}
xpd = proto_table->xops.card_new(xbus, unit, subunit, proto_table, subtype, subunits, to_phone);
if(!xpd) {
XBUS_NOTICE(xbus, "card_new(%d,%d,%d,%d,%d) failed. Ignored.\n",
unit, subunit, proto_table->type, subtype, to_phone);
goto err;
}
out:
return 0;
err:
if(xpd)
xpd_free(xpd);
return ret;
}
static int packet_process(xbus_t *xbus, xpacket_t *pack)
{
byte op;
const xproto_entry_t *xe;
xproto_handler_t handler;
xproto_table_t *table;
xpd_t *xpd;
int ret = -EPROTO;
BUG_ON(!pack);
if(!valid_xpd_addr(&XPACKET_ADDR(pack))) {
if(printk_ratelimit()) {
XBUS_NOTICE(xbus, "%s: from %d%d: bad address.\n",
__FUNCTION__,
XPACKET_ADDR_UNIT(pack), XPACKET_ADDR_SUBUNIT(pack));
dump_packet("packet_process -- bad address", pack, debug);
}
goto out;
}
op = XPACKET_OP(pack);
xpd = xpd_byaddr(xbus, XPACKET_ADDR_UNIT(pack), XPACKET_ADDR_SUBUNIT(pack));
/* XPD may be NULL (e.g: during bus polling */
xe = xproto_global_entry(op);
/*-------- Validations -----------*/
if(!xe) {
const xproto_table_t *xtable;
if(!xpd) {
if(printk_ratelimit()) {
XBUS_NOTICE(xbus, "%s: from %d%d opcode=0x%02X: no such global command.\n",
__FUNCTION__,
XPACKET_ADDR_UNIT(pack), XPACKET_ADDR_SUBUNIT(pack), op);
dump_packet("packet_process -- no such global command", pack, 1);
}
goto out;
}
xtable = xproto_table(xpd->type);
if(!xtable) {
if(printk_ratelimit())
XPD_ERR(xpd, "%s: no protocol table (type=%d)\n",
__FUNCTION__,
xpd->type);
goto out;
}
xe = xproto_card_entry(xtable, op);
if(!xe) {
if(printk_ratelimit()) {
XPD_NOTICE(xpd, "%s: bad command (type=%d,opcode=0x%x)\n",
__FUNCTION__,
xpd->type, op);
dump_packet("packet_process -- bad command", pack, 1);
}
goto out;
}
}
table = xe->table;
BUG_ON(!table);
if(!table->packet_is_valid(pack)) {
if(printk_ratelimit()) {
ERR("xpp: %s: wrong size %d for opcode=0x%02X\n",
__FUNCTION__, XPACKET_LEN(pack), op);
dump_packet("packet_process -- wrong size", pack, debug);
}
goto out;
}
ret = 0; /* All well */
handler = xe->handler;
BUG_ON(!handler);
XBUS_COUNTER(xbus, RX_BYTES) += XPACKET_LEN(pack);
handler(xbus, xpd, xe, pack);
out:
return ret;
}
static int copy_pcm_tospan(xbus_t *xbus, xframe_t *xframe)
{
byte *xframe_end;
xpacket_t *pack;
byte *p;
int ret = -EPROTO; /* Assume error */
if(debug & DBG_PCM)
dump_xframe("RX_XFRAME_PCM", xbus, xframe, debug);
/* handle content */
p = xframe->packets;
xframe_end = p + XFRAME_LEN(xframe);
do {
int len;
xpd_t *xpd;
pack = (xpacket_t *)p;
len = XPACKET_LEN(pack);
/* Sanity checks */
if(unlikely(XPACKET_OP(pack) != XPROTO_NAME(GLOBAL,PCM_READ))) {
static int rate_limit;
if((rate_limit++ % 1003) == 0) {
XBUS_NOTICE(xbus,
"%s: Non-PCM packet within a PCM xframe. (%d)\n",
__FUNCTION__, rate_limit);
dump_xframe("In PCM xframe", xbus, xframe, debug);
}
goto out;
}
p += len;
if(p > xframe_end || len < RPACKET_HEADERSIZE) {
static int rate_limit;
if((rate_limit++ % 1003) == 0) {
XBUS_NOTICE(xbus,
"%s: Invalid packet length %d. (%d)\n",
__FUNCTION__, len, rate_limit);
dump_xframe("BAD LENGTH", xbus, xframe, debug);
}
goto out;
}
xpd = xpd_byaddr(xbus, XPACKET_ADDR_UNIT(pack), XPACKET_ADDR_SUBUNIT(pack));
if(unlikely(!xpd)) {
static int rate_limit;
if((rate_limit++ % 1003) == 0) {
notify_bad_xpd(__FUNCTION__, xbus, XPACKET_ADDR(pack), "RECEIVE PCM");
dump_xframe("Unknown XPD addr", xbus, xframe, debug);
}
goto out;
}
if(!pcm_valid(xpd, pack))
goto out;
if(SPAN_REGISTERED(xpd)) {
XBUS_COUNTER(xbus, RX_PACK_PCM)++;
CALL_XMETHOD(card_pcm_tospan, xbus, xpd, pack);
}
} while(p < xframe_end);
ret = 0; /* all good */
XBUS_COUNTER(xbus, RX_XFRAME_PCM)++;
out:
FREE_RECV_XFRAME(xbus, xframe);
return ret;
}
