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path: root/host/lib/rfnoc/block_ctrl_base.cpp
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Diffstat (limited to 'host/lib/rfnoc/block_ctrl_base.cpp')
-rw-r--r--host/lib/rfnoc/block_ctrl_base.cpp8
1 files changed, 6 insertions, 2 deletions
diff --git a/host/lib/rfnoc/block_ctrl_base.cpp b/host/lib/rfnoc/block_ctrl_base.cpp
index ed8068b5b..e70267b96 100644
--- a/host/lib/rfnoc/block_ctrl_base.cpp
+++ b/host/lib/rfnoc/block_ctrl_base.cpp
@@ -94,12 +94,16 @@ block_ctrl_base::block_ctrl_base(const make_args_t& make_args)
// Set source addresses:
sr_write(SR_BLOCK_SID, get_address(ctrl_port), ctrl_port);
// Set sink buffer sizes:
- settingsbus_reg_t reg = SR_READBACK_REG_FIFOSIZE;
- size_t buf_size_bytes = size_t(sr_read64(reg, ctrl_port));
+ settingsbus_reg_t reg_fifo = SR_READBACK_REG_FIFOSIZE;
+ size_t buf_size_bytes = size_t(sr_read64(reg_fifo, ctrl_port));
if (buf_size_bytes > 0)
n_valid_input_buffers++;
_tree->create<size_t>(_root_path / "input_buffer_size" / ctrl_port)
.set(buf_size_bytes);
+ // Set MTU size and convert to bytes:
+ settingsbus_reg_t reg_mtu = SR_READBACK_REG_MTU;
+ size_t mtu = 8 * (1 << size_t(sr_read64(reg_mtu, ctrl_port)));
+ _tree->create<size_t>(_root_path / "mtu" / ctrl_port).set(mtu);
// Set default destination SIDs
// Otherwise, the default is someone else's SID, which we don't want
sr_write(SR_RESP_IN_DST_SID, 0xFFFF, ctrl_port);