ti: k3: drivers: sec_proxy: Allow clearing a Secure Proxy receive thread
It can be needed to discard all messages in a receive queue. This can be used during some error recovery situations. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Nishanth Menon <nm@ti.com>
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@ -162,6 +162,44 @@ static inline int k3_sec_proxy_verify_thread(struct k3_sec_proxy_thread *spt,
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return 0;
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}
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/**
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* k3_sec_proxy_clear_rx_thread() - Clear Secure Proxy thread
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*
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* @id: Channel Identifier
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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int k3_sec_proxy_clear_rx_thread(enum k3_sec_proxy_chan_id id)
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{
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struct k3_sec_proxy_thread *spt = &spm.threads[id];
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/* Check for any errors already available */
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if (mmio_read_32(spt->rt + RT_THREAD_STATUS) &
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RT_THREAD_STATUS_ERROR_MASK) {
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ERROR("Thread %d is corrupted, cannot send data\n", spt->id);
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return -EINVAL;
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}
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/* Make sure thread is configured for right direction */
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if (!(mmio_read_32(spt->scfg + SCFG_THREAD_CTRL) & SCFG_THREAD_CTRL_DIR_MASK)) {
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ERROR("Cannot clear a transmit thread %d\n", spt->id);
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return -EINVAL;
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}
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/* Read off messages from thread until empty */
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uint32_t try_count = 10;
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while (mmio_read_32(spt->rt + RT_THREAD_STATUS) & RT_THREAD_STATUS_CUR_CNT_MASK) {
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if (!(try_count--)) {
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ERROR("Could not clear all messages from thread %d\n", spt->id);
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return -ETIMEDOUT;
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}
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WARN("Clearing message from thread %d\n", spt->id);
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mmio_read_32(spt->data + spm.desc.data_end_offset);
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}
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return 0;
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}
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/**
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* k3_sec_proxy_send() - Send data over a Secure Proxy thread
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* @id: Channel Identifier
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@ -37,6 +37,15 @@ struct k3_sec_proxy_msg {
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uint8_t *buf;
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};
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/**
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* k3_sec_proxy_send() - Send data over a Secure Proxy thread
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* @id: Channel Identifier
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* @msg: Pointer to k3_sec_proxy_msg
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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int k3_sec_proxy_clear_rx_thread(enum k3_sec_proxy_chan_id id);
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/**
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* k3_sec_proxy_send() - Send data over a Secure Proxy thread
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* @id: Channel Identifier
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