3 * Copyright 2007 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 #include <usrp_server.h>
27 #include <usrp_inband_usb_packet.h>
28 #include <mb_class_registry.h>
31 typedef usrp_inband_usb_packet transport_pkt; // makes conversion to gigabit easy
33 // FIXME We should machine generate these by a simple preprocessor run over this file
35 // These are all the messages that we expect to receive.
37 // We "intern" these here (make them into symbols) so that our
38 // comparisions below are effectively pointer comparisons.
40 static pmt_t s_cmd_allocate_channel = pmt_intern("cmd-allocate-channel");
41 static pmt_t s_cmd_close = pmt_intern("cmd-close");
42 static pmt_t s_cmd_deallocate_channel = pmt_intern("cmd-deallocate-channel");
43 static pmt_t s_cmd_open = pmt_intern("cmd-open");
44 static pmt_t s_cmd_start_recv_raw_samples = pmt_intern("cmd-start-recv-raw-samples");
45 static pmt_t s_cmd_stop_recv_raw_samples = pmt_intern("cmd-stop-recv-raw-samples");
46 static pmt_t s_cmd_to_control_channel = pmt_intern("cmd-to-control-channel");
47 static pmt_t s_cmd_xmit_raw_frame = pmt_intern("cmd-xmit-raw-frame");
48 static pmt_t s_cmd_max_capacity = pmt_intern("cmd-max-capacity");
49 static pmt_t s_cmd_ntx_chan = pmt_intern("cmd-ntx-chan");
50 static pmt_t s_cmd_nrx_chan = pmt_intern("cmd-nrx-chan");
51 static pmt_t s_cmd_current_capacity_allocation = pmt_intern("cmd-current-capacity-allocation");
52 static pmt_t s_response_allocate_channel = pmt_intern("response-allocate-channel");
53 static pmt_t s_response_close = pmt_intern("response-close");
54 static pmt_t s_response_deallocate_channel = pmt_intern("response-deallocate-channel");
55 static pmt_t s_response_from_control_channel = pmt_intern("response-from-control-channel");
56 static pmt_t s_response_open = pmt_intern("response-open");
57 static pmt_t s_response_recv_raw_samples = pmt_intern("response-recv-raw-samples");
58 static pmt_t s_response_xmit_raw_frame = pmt_intern("response-xmit-raw-frame");
59 static pmt_t s_response_max_capacity = pmt_intern("response-max-capacity");
60 static pmt_t s_response_ntx_chan = pmt_intern("response-ntx-chan");
61 static pmt_t s_response_nrx_chan = pmt_intern("response-nrx-chan");
62 static pmt_t s_response_current_capacity_allocation = pmt_intern("response-current-capacity-allocation");
72 usrp_server::usrp_server(mb_runtime *rt, const std::string &instance_name, pmt_t user_arg)
73 : mb_mblock(rt, instance_name, user_arg)
77 // control & status port
78 d_cs = define_port("cs", "usrp-server-cs", true, mb_port::EXTERNAL);
82 // (if/when we do replicated ports, these will be replaced by a
83 // single replicated port)
84 for(int port=0; port < N_PORTS; port++) {
85 d_tx.push_back(define_port("tx"+str(port), "usrp-tx", true, mb_port::EXTERNAL));
86 d_rx.push_back(define_port("rx"+str(port), "usrp-rx", true, mb_port::EXTERNAL));
89 // FIXME ... initializing to 2 channels on each for now, eventually we should
90 // query the FPGA to get these values
94 // Initialize capacity on each channel to 0 and to no owner
95 for(int chan=0; chan < d_ntx_chan; chan++) {
96 d_chaninfo_tx[chan].assigned_capacity = 0;
97 d_chaninfo_tx[chan].owner = PMT_NIL;
99 for(int chan=0; chan < d_nrx_chan; chan++) {
100 d_chaninfo_rx[chan].assigned_capacity = 0;
101 d_chaninfo_rx[chan].owner = PMT_NIL;
105 usrp_server::~usrp_server()
111 usrp_server::initial_transition()
113 // the initial transition
117 usrp_server::handle_message(mb_message_sptr msg)
119 pmt_t event = msg->signal(); // the "name" of the message
120 pmt_t port_id = msg->port_id(); // which port it came in on
121 pmt_t data = msg->data();
122 pmt_t metadata = msg->metadata();
123 pmt_t invocation_handle;
128 std::cout << "[USRP_SERVER] event: " << event << std::endl;
129 std::cout << "[USRP_SERVER] port_id: " << port_id << std::endl;
132 // It would be nice if this were all table driven, and we could
133 // compute our state transition as f(current_state, port_id, signal)
135 if (pmt_eq(port_id, d_cs->port_symbol())){ // message came in on our control/status port
137 if (pmt_eq(event, s_cmd_open)){
138 // extract args from data
139 invocation_handle = pmt_nth(0, data);
140 long which_usrp = pmt_to_long(pmt_nth(1, data)); // integer usrp id, usually 0
142 // Do the right thing....
144 (void) which_usrp; // avoid unused warning
148 reply_data = pmt_list2(invocation_handle, status);
151 d_cs->send(s_response_open, reply_data);
154 else if (pmt_eq(event, s_cmd_close)){
157 else if (pmt_eq(event, s_cmd_max_capacity)) {
158 invocation_handle = pmt_nth(0, data);
159 reply_data = pmt_list2(invocation_handle, pmt_from_long(max_capacity()));
160 d_cs->send(s_response_max_capacity, reply_data);
163 else if (pmt_eq(event, s_cmd_ntx_chan)) {
164 invocation_handle = pmt_nth(0, data);
165 reply_data = pmt_list2(invocation_handle, pmt_from_long(d_ntx_chan));
166 d_cs->send(s_response_ntx_chan, reply_data);
168 else if (pmt_eq(event, s_cmd_nrx_chan)) {
169 invocation_handle = pmt_nth(0, data);
170 reply_data = pmt_list2(invocation_handle, pmt_from_long(d_nrx_chan));
171 d_cs->send(s_response_nrx_chan, reply_data);
173 else if (pmt_eq(event, s_cmd_current_capacity_allocation)) {
174 invocation_handle = pmt_nth(0, data);
175 reply_data = pmt_list2(invocation_handle, pmt_from_long(current_capacity_allocation()));
176 d_cs->send(s_response_current_capacity_allocation, reply_data);
181 if (pmt_eq(event, s_cmd_allocate_channel)){
182 handle_cmd_allocate_channel(port_id, data);
186 if (pmt_eq(event, s_cmd_deallocate_channel)) {
187 handle_cmd_deallocate_channel(port_id, data);
191 if (pmt_eq(event, s_cmd_xmit_raw_frame)){
192 handle_cmd_xmit_raw_frame(data);
197 std::cout << "[USRP_SERVER] unhandled msg: " << msg << std::endl;
200 // Return -1 if it is not an RX port, or an index
201 int usrp_server::tx_port_index(pmt_t port_id) {
203 for(int i=0; i < (int) d_tx.size(); i++)
204 if(pmt_eq(d_tx[i]->port_symbol(), port_id))
210 // Return -1 if it is not an RX port, or an index
211 int usrp_server::rx_port_index(pmt_t port_id) {
213 for(int i=0; i < (int) d_rx.size(); i++)
214 if(pmt_eq(d_rx[i]->port_symbol(), port_id))
220 // Go through all TX and RX channels, sum up the assigned capacity
222 long usrp_server::current_capacity_allocation() {
225 for(int chan=0; chan < d_ntx_chan; chan++)
226 capacity += d_chaninfo_tx[chan].assigned_capacity;
228 for(int chan=0; chan < d_nrx_chan; chan++)
229 capacity += d_chaninfo_rx[chan].assigned_capacity;
234 void usrp_server::handle_cmd_allocate_channel(pmt_t port_id, pmt_t data) {
236 pmt_t invocation_handle = pmt_nth(0, data);
237 long rqstd_capacity = pmt_to_long(pmt_nth(1, data));
241 // If it's a TX port, allocate on a free channel, else check if it's a RX port
243 if((port = tx_port_index(port_id)) != -1) {
245 // Check capacity exists
246 if((D_USB_CAPACITY - current_capacity_allocation()) < rqstd_capacity) {
247 reply_data = pmt_list3(invocation_handle, pmt_from_long(RQSTD_CAPACITY_UNAVAIL), PMT_NIL); // no capacity available
248 d_tx[port]->send(s_response_allocate_channel, reply_data);
252 // Find a free channel, assign the capacity and respond
253 for(chan=0; chan < d_ntx_chan; chan++) {
254 if(d_chaninfo_tx[chan].owner == PMT_NIL) {
255 d_chaninfo_tx[chan].owner = port_id;
256 d_chaninfo_tx[chan].assigned_capacity = rqstd_capacity;
257 reply_data = pmt_list3(invocation_handle, PMT_T, pmt_from_long(chan));
258 d_tx[port]->send(s_response_allocate_channel, reply_data);
263 std::cout << "[USRP_SERVER] Couldnt find a TX chan\n";
265 reply_data = pmt_list3(invocation_handle, pmt_from_long(CHANNEL_UNAVAIL), PMT_NIL); // no free TX chan found
266 d_tx[port]->send(s_response_allocate_channel, reply_data);
270 // Repeat the same process on the RX side if the port was not determined to be TX
271 if((port = rx_port_index(port_id)) != -1) {
273 if((D_USB_CAPACITY - current_capacity_allocation()) < rqstd_capacity) {
274 reply_data = pmt_list3(invocation_handle, pmt_from_long(RQSTD_CAPACITY_UNAVAIL), PMT_NIL); // no capacity available
275 d_rx[port]->send(s_response_allocate_channel, reply_data);
279 for(chan=0; chan < d_nrx_chan; chan++) {
280 if(d_chaninfo_rx[chan].owner == PMT_NIL) {
281 d_chaninfo_rx[chan].owner = port_id;
282 d_chaninfo_rx[chan].assigned_capacity = rqstd_capacity;
283 reply_data = pmt_list3(invocation_handle, PMT_T, pmt_from_long(chan));
284 d_rx[port]->send(s_response_allocate_channel, reply_data);
289 std::cout << "[USRP_SERVER] Couldnt find a RX chan\n";
290 reply_data = pmt_list3(invocation_handle, pmt_from_long(CHANNEL_UNAVAIL), PMT_NIL); // no free RX chan found
291 d_rx[port]->send(s_response_allocate_channel, reply_data);
296 // Check the port type and deallocate assigned capacity based on this, ensuring
297 // that the owner of the method invocation is the owner of the port and that
298 // the channel number is valid.
299 void usrp_server::handle_cmd_deallocate_channel(pmt_t port_id, pmt_t data) {
301 pmt_t invocation_handle = pmt_nth(0, data);
302 long channel = pmt_to_long(pmt_nth(1, data));
306 // Check that the channel number is valid, and that the calling port is the owner
307 // of the channel, and if so remove the assigned capacity.
308 if((port = tx_port_index(port_id)) != -1) {
310 if(channel >= d_ntx_chan) {
311 reply_data = pmt_list2(invocation_handle, pmt_from_long(CHANNEL_INVALID)); // not a legit channel number
312 d_tx[port]->send(s_response_deallocate_channel, reply_data);
316 if(d_chaninfo_tx[channel].owner != port_id) {
317 reply_data = pmt_list2(invocation_handle, pmt_from_long(PERMISSION_DENIED)); // not the owner of the port
318 d_tx[port]->send(s_response_deallocate_channel, reply_data);
322 d_chaninfo_tx[channel].assigned_capacity = 0;
323 d_chaninfo_tx[channel].owner = PMT_NIL;
325 reply_data = pmt_list2(invocation_handle, PMT_T);
326 d_tx[port]->send(s_response_deallocate_channel, reply_data);
330 // Repeated process on the RX side
331 if((port = rx_port_index(port_id)) != -1) {
333 if(channel >= d_nrx_chan) {
334 reply_data = pmt_list2(invocation_handle, pmt_from_long(CHANNEL_INVALID)); // not a legit channel number
335 d_rx[port]->send(s_response_deallocate_channel, reply_data);
339 if(d_chaninfo_rx[channel].owner != port_id) {
340 reply_data = pmt_list2(invocation_handle, pmt_from_long(PERMISSION_DENIED)); // not the owner of the port
341 d_rx[port]->send(s_response_deallocate_channel, reply_data);
345 d_chaninfo_rx[channel].assigned_capacity = 0;
346 d_chaninfo_rx[channel].owner = PMT_NIL;
348 reply_data = pmt_list2(invocation_handle, PMT_T);
349 d_rx[port]->send(s_response_deallocate_channel, reply_data);
355 void usrp_server::handle_cmd_xmit_raw_frame(pmt_t data) {
357 size_t n_bytes, psize;
358 long max_payload_len = transport_pkt::max_payload();
360 pmt_t invocation_handle = pmt_nth(0, data);
361 long channel = pmt_to_long(pmt_nth(1, data));
362 const void *samples = pmt_uniform_vector_elements(pmt_nth(2, data), n_bytes);
363 long timestamp = pmt_to_long(pmt_nth(3, data));
365 // Determine the number of packets to allocate contiguous memory for bursting over the
366 // USB and get a pointer to the memory to be used in building the packets
367 long n_packets = static_cast<long>(std::ceil(n_bytes / (double)max_payload_len));
368 pmt_t v_packets = pmt_make_u8vector(sizeof(transport_pkt) * n_packets, 0);
370 transport_pkt *pkts =
371 (transport_pkt *) pmt_u8vector_writeable_elements(v_packets, psize);
373 for(int n=0; n < n_packets; n++) {
375 long payload_len = std::min((long)(n_bytes-(n*max_payload_len)), (long)max_payload_len);
377 if(n == 0) { // first packet gets start of burst flag and timestamp
378 pkts[n].set_header(pkts[n].FL_START_OF_BURST, channel, 0, payload_len);
379 pkts[n].set_timestamp(timestamp);
381 pkts[n].set_header(0, channel, 0, payload_len);
382 pkts[n].set_timestamp(0xffffffff);
385 memcpy(pkts[n].payload(), (uint8_t *)samples+(max_payload_len * n), payload_len);
388 pkts[n_packets-1].set_end_of_burst(); // set the last packet's end of burst
390 // interface with the USRP to send the USB packet, since the memory is
391 // contiguous, this should be a serious of memory copies to the bus, each being
392 // USB_PKT_SIZE * MAX_PACKET_BURST bytes worth of data (given a full burst)
395 REGISTER_MBLOCK_CLASS(usrp_server);