i40e: improved debug messages

i40e_bm/i40e_adminq.cc

@@ -224,6 +224,7 @@ void queue_admin_tx::cmd_run(void *desc, uint32_t idx, void *data)
         memset(&hr, 0, sizeof(hr));
         hr.num_reported = report;
         hr.num_total = cnt;
+        std::cerr << "    report=" << report << " cnt=" << cnt << "  seid=" << sw->seid << std::endl;
 
         // create temporary contiguous buffer
         size_t buflen = sizeof(hr) + sizeof(els[0]) * report;

i40e_bm/i40e_lan.cc

@@ -256,7 +256,7 @@ void lan_queue_rx::packet_received(const void *data, size_t pktlen)
         return;
     }
 
-    std::cerr << "rxq: packet received" << std::endl;
+    std::cerr << "rxq: packet received didx=" << dcache_first_idx << " cnt=" << dcache_first_cnt << std::endl;
     union i40e_32byte_rx_desc rxd;
     memset(&rxd, 0, sizeof(rxd));
     rxd.wb.qword1.status_error_len |= (1 << I40E_RX_DESC_STATUS_DD_SHIFT);
@@ -312,11 +312,12 @@ void lan_queue_tx::initialize()
 
 void lan_queue_tx::desc_fetched(void *desc_buf, uint32_t didx)
 {
-    std::cerr << "txq: desc fetched" << std::endl;
 
     struct i40e_tx_desc *desc = reinterpret_cast<struct i40e_tx_desc *>(desc_buf);
     uint64_t d1 = desc->cmd_type_offset_bsz;
 
+    std::cerr << "txq: desc fetched didx=" << didx << " d1=" << d1 << std::endl;
+
     uint8_t dtype = (d1 & I40E_TXD_QW1_DTYPE_MASK) >> I40E_TXD_QW1_DTYPE_SHIFT;
     if (dtype == I40E_TX_DESC_DTYPE_DATA) {
         uint16_t len = (d1 & I40E_TXD_QW1_TX_BUF_SZ_MASK) >>
@@ -345,9 +346,9 @@ void lan_queue_tx::desc_fetched(void *desc_buf, uint32_t didx)
 
 void lan_queue_tx::data_fetched(void *desc_buf, uint32_t didx, void *data)
 {
-    std::cerr << "txq: data fetched" << std::endl;
     struct i40e_tx_desc *desc = reinterpret_cast<struct i40e_tx_desc *>(desc_buf);
     uint64_t d1 = desc->cmd_type_offset_bsz;
+    std::cerr << "txq: data fetched didx=" << didx << " d1=" << d1 << std::endl;
     uint16_t pkt_len = (d1 & I40E_TXD_QW1_TX_BUF_SZ_MASK) >>
         I40E_TXD_QW1_TX_BUF_SZ_SHIFT;
 
@@ -364,6 +365,8 @@ void lan_queue_tx::data_fetched(void *desc_buf, uint32_t didx, void *data)
     /*uint16_t l4len = (off & I40E_TXD_QW1_L4LEN_MASK) >>
         I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT;*/
 
+    std::cerr << "    eop=" << eop << " len=" << pkt_len << " pktbuf_len=" << pktbuf_len << std::endl;
+
     // part of a multi-descriptor packet
     if (!eop || pktbuf_len != 0) {
         if (pktbuf_len + pkt_len > MTU) {

i40e_bm/i40e_queues.cc

@@ -32,8 +32,8 @@ void queue_base::trigger_fetch()
 
     pending_fetches++;
 
-    std::cerr << "fetching " << (reg_tail - fetch_head) % len <<
-        " descriptors from " << dma->dma_addr << std::endl;
+    std::cerr << "fetching: avail=" << (reg_tail - fetch_head) % len <<
+        " fhead=" << fetch_head << " from " << dma->dma_addr << std::endl;
 
     std::cerr << "dma = " << dma << std::endl;
     runner->issue_dma(*dma);
@@ -112,6 +112,7 @@ uint32_t queue_base::max_fetch_capacity()
 
 void queue_base::desc_done(uint32_t idx)
 {
+    assert(reg_head == idx);
     reg_head = (idx + 1) % len;
     trigger_fetch();
 }