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author | Antonio Niño Díaz <antonio.ninodiaz@arm.com> | 2019-01-22 15:03:01 +0000 |
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committer | GitHub <noreply@github.com> | 2019-01-22 15:03:01 +0000 |
commit | a0d894397d5729aa72840dc49120f4d198174e22 (patch) | |
tree | 8ef0a9a9b7baf56560cb10bc0552f9cda740d8c0 /plat/ti/k3/common/drivers/sec_proxy/sec_proxy.c | |
parent | 94764b06fa75b2f53100dc3627dc74c6079402bf (diff) | |
parent | 73522f0087cee4d3e290356e4ee6f2de5c516be4 (diff) | |
download | trusted-firmware-a-a0d894397d5729aa72840dc49120f4d198174e22.tar.gz |
Merge pull request #1772 from glneo/clear-proxy-queue
TI K3 Clear proxy receive queue on transmit
Diffstat (limited to 'plat/ti/k3/common/drivers/sec_proxy/sec_proxy.c')
-rw-r--r-- | plat/ti/k3/common/drivers/sec_proxy/sec_proxy.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/plat/ti/k3/common/drivers/sec_proxy/sec_proxy.c b/plat/ti/k3/common/drivers/sec_proxy/sec_proxy.c index 2a013ed0c6..49cecd44ca 100644 --- a/plat/ti/k3/common/drivers/sec_proxy/sec_proxy.c +++ b/plat/ti/k3/common/drivers/sec_proxy/sec_proxy.c @@ -163,6 +163,44 @@ static inline int k3_sec_proxy_verify_thread(struct k3_sec_proxy_thread *spt, } /** + * k3_sec_proxy_clear_rx_thread() - Clear Secure Proxy thread + * + * @id: Channel Identifier + * + * Return: 0 if all goes well, else appropriate error message + */ +int k3_sec_proxy_clear_rx_thread(enum k3_sec_proxy_chan_id id) +{ + struct k3_sec_proxy_thread *spt = &spm.threads[id]; + + /* Check for any errors already available */ + if (mmio_read_32(spt->rt + RT_THREAD_STATUS) & + RT_THREAD_STATUS_ERROR_MASK) { + ERROR("Thread %d is corrupted, cannot send data\n", spt->id); + return -EINVAL; + } + + /* Make sure thread is configured for right direction */ + if (!(mmio_read_32(spt->scfg + SCFG_THREAD_CTRL) & SCFG_THREAD_CTRL_DIR_MASK)) { + ERROR("Cannot clear a transmit thread %d\n", spt->id); + return -EINVAL; + } + + /* Read off messages from thread until empty */ + uint32_t try_count = 10; + while (mmio_read_32(spt->rt + RT_THREAD_STATUS) & RT_THREAD_STATUS_CUR_CNT_MASK) { + if (!(try_count--)) { + ERROR("Could not clear all messages from thread %d\n", spt->id); + return -ETIMEDOUT; + } + WARN("Clearing message from thread %d\n", spt->id); + mmio_read_32(spt->data + spm.desc.data_end_offset); + } + + return 0; +} + +/** * k3_sec_proxy_send() - Send data over a Secure Proxy thread * @id: Channel Identifier * @msg: Pointer to k3_sec_proxy_msg |