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 2, 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....
147 reply_data = pmt_list2(invocation_handle, status);
150 d_cs->send(s_response_open, reply_data);
153 else if (pmt_eq(event, s_cmd_close)){
156 else if (pmt_eq(event, s_cmd_max_capacity)) {
157 invocation_handle = pmt_nth(0, data);
158 reply_data = pmt_list2(invocation_handle, pmt_from_long(max_capacity()));
159 d_cs->send(s_response_max_capacity, reply_data);
162 else if (pmt_eq(event, s_cmd_ntx_chan)) {
163 invocation_handle = pmt_nth(0, data);
164 reply_data = pmt_list2(invocation_handle, pmt_from_long(d_ntx_chan));
165 d_cs->send(s_response_ntx_chan, reply_data);
167 else if (pmt_eq(event, s_cmd_nrx_chan)) {
168 invocation_handle = pmt_nth(0, data);
169 reply_data = pmt_list2(invocation_handle, pmt_from_long(d_nrx_chan));
170 d_cs->send(s_response_nrx_chan, reply_data);
172 else if (pmt_eq(event, s_cmd_current_capacity_allocation)) {
173 invocation_handle = pmt_nth(0, data);
174 reply_data = pmt_list2(invocation_handle, pmt_from_long(current_capacity_allocation()));
175 d_cs->send(s_response_current_capacity_allocation, reply_data);
180 if (pmt_eq(event, s_cmd_allocate_channel)){
181 handle_cmd_allocate_channel(port_id, data);
185 if (pmt_eq(event, s_cmd_deallocate_channel)) {
186 handle_cmd_deallocate_channel(port_id, data);
190 if (pmt_eq(event, s_cmd_xmit_raw_frame)){
191 handle_cmd_xmit_raw_frame(data);
196 std::cout << "[USRP_SERVER] unhandled msg: " << msg << std::endl;
199 // Return -1 if it is not an RX port, or an index
200 int usrp_server::tx_port_index(pmt_t port_id) {
202 for(int i=0; i < (int) d_tx.size(); i++)
203 if(pmt_eq(d_tx[i]->port_symbol(), port_id))
209 // Return -1 if it is not an RX port, or an index
210 int usrp_server::rx_port_index(pmt_t port_id) {
212 for(int i=0; i < (int) d_rx.size(); i++)
213 if(pmt_eq(d_rx[i]->port_symbol(), port_id))
219 // Go through all TX and RX channels, sum up the assigned capacity
221 long usrp_server::current_capacity_allocation() {
224 for(int chan=0; chan < d_ntx_chan; chan++)
225 capacity += d_chaninfo_tx[chan].assigned_capacity;
227 for(int chan=0; chan < d_nrx_chan; chan++)
228 capacity += d_chaninfo_rx[chan].assigned_capacity;
233 void usrp_server::handle_cmd_allocate_channel(pmt_t port_id, pmt_t data) {
235 pmt_t invocation_handle = pmt_nth(0, data);
236 long rqstd_capacity = pmt_to_long(pmt_nth(1, data));
240 // If it's a TX port, allocate on a free channel, else check if it's a RX port
242 if((port = tx_port_index(port_id)) != -1) {
244 // Check capacity exists
245 if((D_USB_CAPACITY - current_capacity_allocation()) < rqstd_capacity) {
246 reply_data = pmt_list3(invocation_handle, pmt_from_long(RQSTD_CAPACITY_UNAVAIL), PMT_NIL); // no capacity available
247 d_tx[port]->send(s_response_allocate_channel, reply_data);
251 // Find a free channel, assign the capacity and respond
252 for(chan=0; chan < d_ntx_chan; chan++) {
253 if(d_chaninfo_tx[chan].owner == PMT_NIL) {
254 d_chaninfo_tx[chan].owner = port_id;
255 d_chaninfo_tx[chan].assigned_capacity = rqstd_capacity;
256 reply_data = pmt_list3(invocation_handle, PMT_T, pmt_from_long(chan));
257 d_tx[port]->send(s_response_allocate_channel, reply_data);
262 std::cout << "[USRP_SERVER] Couldnt find a TX chan\n";
264 reply_data = pmt_list3(invocation_handle, pmt_from_long(CHANNEL_UNAVAIL), PMT_NIL); // no free TX chan found
265 d_tx[port]->send(s_response_allocate_channel, reply_data);
269 // Repeat the same process on the RX side if the port was not determined to be TX
270 if((port = rx_port_index(port_id)) != -1) {
272 if((D_USB_CAPACITY - current_capacity_allocation()) < rqstd_capacity) {
273 reply_data = pmt_list3(invocation_handle, pmt_from_long(RQSTD_CAPACITY_UNAVAIL), PMT_NIL); // no capacity available
274 d_rx[port]->send(s_response_allocate_channel, reply_data);
278 for(chan=0; chan < d_nrx_chan; chan++) {
279 if(d_chaninfo_rx[chan].owner == PMT_NIL) {
280 d_chaninfo_rx[chan].owner = port_id;
281 d_chaninfo_rx[chan].assigned_capacity = rqstd_capacity;
282 reply_data = pmt_list3(invocation_handle, PMT_T, pmt_from_long(chan));
283 d_rx[port]->send(s_response_allocate_channel, reply_data);
288 std::cout << "[USRP_SERVER] Couldnt find a RX chan\n";
289 reply_data = pmt_list3(invocation_handle, pmt_from_long(CHANNEL_UNAVAIL), PMT_NIL); // no free RX chan found
290 d_rx[port]->send(s_response_allocate_channel, reply_data);
295 // Check the port type and deallocate assigned capacity based on this, ensuring
296 // that the owner of the method invocation is the owner of the port and that
297 // the channel number is valid.
298 void usrp_server::handle_cmd_deallocate_channel(pmt_t port_id, pmt_t data) {
300 pmt_t invocation_handle = pmt_nth(0, data);
301 long channel = pmt_to_long(pmt_nth(1, data));
305 // Check that the channel number is valid, and that the calling port is the owner
306 // of the channel, and if so remove the assigned capacity.
307 if((port = tx_port_index(port_id)) != -1) {
309 if(channel >= d_ntx_chan) {
310 reply_data = pmt_list2(invocation_handle, pmt_from_long(CHANNEL_INVALID)); // not a legit channel number
311 d_tx[port]->send(s_response_deallocate_channel, reply_data);
315 if(d_chaninfo_tx[channel].owner != port_id) {
316 reply_data = pmt_list2(invocation_handle, pmt_from_long(PERMISSION_DENIED)); // not the owner of the port
317 d_tx[port]->send(s_response_deallocate_channel, reply_data);
321 d_chaninfo_tx[channel].assigned_capacity = 0;
322 d_chaninfo_tx[channel].owner = PMT_NIL;
324 reply_data = pmt_list2(invocation_handle, PMT_T);
325 d_tx[port]->send(s_response_deallocate_channel, reply_data);
329 // Repeated process on the RX side
330 if((port = rx_port_index(port_id)) != -1) {
332 if(channel >= d_nrx_chan) {
333 reply_data = pmt_list2(invocation_handle, pmt_from_long(CHANNEL_INVALID)); // not a legit channel number
334 d_rx[port]->send(s_response_deallocate_channel, reply_data);
338 if(d_chaninfo_rx[channel].owner != port_id) {
339 reply_data = pmt_list2(invocation_handle, pmt_from_long(PERMISSION_DENIED)); // not the owner of the port
340 d_rx[port]->send(s_response_deallocate_channel, reply_data);
344 d_chaninfo_rx[channel].assigned_capacity = 0;
345 d_chaninfo_rx[channel].owner = PMT_NIL;
347 reply_data = pmt_list2(invocation_handle, PMT_T);
348 d_rx[port]->send(s_response_deallocate_channel, reply_data);
354 void usrp_server::handle_cmd_xmit_raw_frame(pmt_t data) {
356 size_t n_bytes, psize;
357 long max_payload_len = transport_pkt::max_payload();
359 pmt_t invocation_handle = pmt_nth(0, data);
360 long channel = pmt_to_long(pmt_nth(1, data));
361 const void *samples = pmt_uniform_vector_elements(pmt_nth(2, data), n_bytes);
362 long timestamp = pmt_to_long(pmt_nth(3, data));
364 // Determine the number of packets to allocate contiguous memory for bursting over the
365 // USB and get a pointer to the memory to be used in building the packets
366 long n_packets = static_cast<long>(std::ceil(n_bytes / (double)max_payload_len));
367 pmt_t v_packets = pmt_make_u8vector(sizeof(transport_pkt) * n_packets, 0);
369 transport_pkt *pkts =
370 (transport_pkt *) pmt_u8vector_writeable_elements(v_packets, psize);
372 for(int n=0; n < n_packets; n++) {
374 long payload_len = std::min((long)(n_bytes-(n*max_payload_len)), (long)max_payload_len);
376 if(n == 0) { // first packet gets start of burst flag and timestamp
377 pkts[n].set_header(pkts[n].FL_START_OF_BURST, channel, 0, payload_len);
378 pkts[n].set_timestamp(timestamp);
380 pkts[n].set_header(0, channel, 0, payload_len);
381 pkts[n].set_timestamp(0xffffffff);
384 memcpy(pkts[n].payload(), (uint8_t *)samples+(max_payload_len * n), payload_len);
387 pkts[n_packets-1].set_end_of_burst(); // set the last packet's end of burst
389 // interface with the USRP to send the USB packet, since the memory is
390 // contiguous, this should be a serious of memory copies to the bus, each being
391 // USB_PKT_SIZE * MAX_PACKET_BURST bytes worth of data (given a full burst)
394 REGISTER_MBLOCK_CLASS(usrp_server);