From if_rl it looks like it’s hardcoded for each driver. if_rlreg.h says the 8169 supports up to 1024 but we set RL_8169_TX_DESC_CNT to 256.
From if_rl it looks like it’s hardcoded for each driver. if_rlreg.h says the 8169 supports up to 1024 but we set RL_8169_TX_DESC_CNT to 256.