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Commit 242f49d1 authored by Chris Manton's avatar Chris Manton
Browse files

Break out l2c_link_send_to_lower into br_edr and ble 

stack/l2cap/l2c_link::l2c_link_send_to_lower

Towards proper interfaces

Bug: 163134718
Tag: #refactor
Test: compile & verify basic functions working

Change-Id: Ia8c833a0ab806429743bd974d595cc102b738c5c
parent 13ae0343

system/stack/l2cap/l2c_link.cc

+103 −2
Original line number Diff line number Diff line
@@ -1015,8 +1015,7 @@ constexpr uint16_t kDataPacketEventBrEdr = (BT_EVT_TO_LM_HCI_ACL); 
constexpr uint16_t kDataPacketEventBle =

    (BT_EVT_TO_LM_HCI_ACL | LOCAL_BLE_CONTROLLER_ID);



static void l2c_link_send_to_lower(tL2C_LCB* p_lcb, BT_HDR* p_buf,

                                   tL2C_TX_COMPLETE_CB_INFO* p_cbi) {

static void l2c_link_send_to_lower_br_edr(tL2C_LCB* p_lcb, BT_HDR* p_buf) {

  const uint16_t acl_packet_size_classic =

      controller_get_interface()->get_acl_packet_size_classic();

  const uint16_t acl_packet_size_ble =
@@ -1085,7 +1084,101 @@ static void l2c_link_send_to_lower(tL2C_LCB* p_lcb, BT_HDR* p_buf, 
      if (p_lcb->link_xmit_quota == 0) l2cb.ble_round_robin_unacked += num_segs;

    } else {

      l2cb.controller_xmit_window -= num_segs;

      if (p_lcb->link_xmit_quota == 0) l2cb.round_robin_unacked += num_segs;

    }



    p_lcb->sent_not_acked += num_segs;

    if (transport == BT_TRANSPORT_LE) {

      bte_main_hci_send(p_buf, kDataPacketEventBle);

    } else {

      bte_main_hci_send(p_buf, kDataPacketEventBrEdr);

    }

  }



  if (transport == BT_TRANSPORT_LE) {

    L2CAP_TRACE_DEBUG(

        "TotalWin=%d,Hndl=0x%x,Quota=%d,Unack=%d,RRQuota=%d,RRUnack=%d",

        l2cb.controller_le_xmit_window, p_lcb->handle, p_lcb->link_xmit_quota,

        p_lcb->sent_not_acked, l2cb.ble_round_robin_quota,

        l2cb.ble_round_robin_unacked);

  } else {

    L2CAP_TRACE_DEBUG(

        "TotalWin=%d,Hndl=0x%x,Quota=%d,Unack=%d,RRQuota=%d,RRUnack=%d",

        l2cb.controller_xmit_window, p_lcb->handle, p_lcb->link_xmit_quota,

        p_lcb->sent_not_acked, l2cb.round_robin_quota,

        l2cb.round_robin_unacked);

  }

}



static void l2c_link_send_to_lower_ble(tL2C_LCB* p_lcb, BT_HDR* p_buf) {

  const uint16_t acl_packet_size_classic =

      controller_get_interface()->get_acl_packet_size_classic();

  const uint16_t acl_packet_size_ble =

      controller_get_interface()->get_acl_packet_size_ble();

  const uint16_t link_xmit_quota = p_lcb->link_xmit_quota;

  const tBT_TRANSPORT transport = p_lcb->transport;



  const bool is_bdr_and_fits_in_buffer =

      (transport == BT_TRANSPORT_BR_EDR &&

       (p_buf->len <= acl_packet_size_classic));

  const bool is_ble_and_fits_in_buffer =

      (transport == BT_TRANSPORT_LE && (p_buf->len <= acl_packet_size_ble));



  if (is_bdr_and_fits_in_buffer || is_ble_and_fits_in_buffer) {

    if (link_xmit_quota == 0) {

      if (transport == BT_TRANSPORT_LE)

        l2cb.ble_round_robin_unacked++;

      else

        l2cb.round_robin_unacked++;

    }

    p_lcb->sent_not_acked++;

    p_buf->layer_specific = 0;



    if (transport == BT_TRANSPORT_LE) {

      l2cb.controller_le_xmit_window--;

      bte_main_hci_send(p_buf, kDataPacketEventBle);

    } else {

      l2cb.controller_xmit_window--;

      bte_main_hci_send(p_buf, kDataPacketEventBrEdr);

    }

  } else {

    uint16_t xmit_window{0};

    uint16_t acl_data_size{0};

    if (transport == BT_TRANSPORT_LE) {

      acl_data_size = acl_packet_size_ble;

      xmit_window = l2cb.controller_le_xmit_window;



    } else {

      acl_data_size = acl_packet_size_classic;

      xmit_window = l2cb.controller_xmit_window;

    }

    uint16_t num_segs =

        (p_buf->len - HCI_DATA_PREAMBLE_SIZE + acl_data_size - 1) /

        acl_data_size;



    /* If doing round-robin, then only 1 segment each time */

    if (p_lcb->link_xmit_quota == 0) {

      num_segs = 1;

      p_lcb->partial_segment_being_sent = true;

    } else {

      /* Multi-segment packet. Make sure it can fit */

      if (num_segs > xmit_window) {

        num_segs = xmit_window;

        p_lcb->partial_segment_being_sent = true;

      }



      if (num_segs > (p_lcb->link_xmit_quota - p_lcb->sent_not_acked)) {

        num_segs = (p_lcb->link_xmit_quota - p_lcb->sent_not_acked);

        p_lcb->partial_segment_being_sent = true;

      }

    }



    p_buf->layer_specific = num_segs;

    if (transport == BT_TRANSPORT_LE) {

      l2cb.controller_le_xmit_window -= num_segs;

      if (p_lcb->link_xmit_quota == 0) l2cb.ble_round_robin_unacked += num_segs;

    } else {

      l2cb.controller_xmit_window -= num_segs;

      if (p_lcb->link_xmit_quota == 0) l2cb.round_robin_unacked += num_segs;

    }
@@ -1110,7 +1203,15 @@ static void l2c_link_send_to_lower(tL2C_LCB* p_lcb, BT_HDR* p_buf, 
        p_lcb->sent_not_acked, l2cb.round_robin_quota,

        l2cb.round_robin_unacked);

  }

}



static void l2c_link_send_to_lower(tL2C_LCB* p_lcb, BT_HDR* p_buf,

                                   tL2C_TX_COMPLETE_CB_INFO* p_cbi) {

  if (p_lcb->transport == BT_TRANSPORT_BR_EDR) {

    l2c_link_send_to_lower_br_edr(p_lcb, p_buf);

  } else {

    l2c_link_send_to_lower_ble(p_lcb, p_buf);

  }

  if (p_cbi) l2cu_tx_complete(p_cbi);

}