SRIO传输数据时，先运行doorbell再NWRITE发送数据，会卡在下面这个地方，如果我开始的时候只发NWRITE包就不会出现这样的问题

user4664208

Uint32 KeyStone_SRIO_wait_LSU_completion(Uint32 lsuNum,
Uint32 transactionID, Uint32 contextBit)
{
Uint32 uiStateIndex= LSU_state_index_table[lsuNum][transactionID];
Uint32 uiCompletionCode;

do
{
uiCompletionCode=(gpSRIO_regs->LSU_STAT_REG[uiStateIndex/8]>>
((uiStateIndex&7)*4))&0xF;
}
while((uiCompletionCode&1) != contextBit);

return (uiCompletionCode>>1);
}

我先给DSP发送一个doorbell信号，通知DSP已经准备好了，然后再用NWRITE方式发送数据，会一直卡在这个循环，看了一下各个寄存器的值，LSU_STAT_REG[0]变成了3.查看手册，这个表示

Transaction Timeout occurred on Non-posted transaction

想问一下是什么问题，能怎么解决

8 年多前

0 user4664208 8 年多前

Prodigy 220 points

Uint32 KeyStone_SRIO_wait_LSU_completion(Uint32 lsuNum,
Uint32 transactionID, Uint32 contextBit)
{
Uint32 uiStateIndex= LSU_state_index_table[lsuNum][transactionID];
Uint32 uiCompletionCode;

do
{
uiCompletionCode=(gpSRIO_regs->LSU_STAT_REG[uiStateIndex/8]>>
((uiStateIndex&7)*4))&0xF;
}
while((uiCompletionCode&1) != contextBit);

return (uiCompletionCode>>1);
}

Transaction Timeout occurred on Non-posted transaction

想问一下是什么问题，能怎么解决