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andk pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/mynewt-core.git
commit fa3cd4ee33fff312f80fee2eda27736f34542202
Author: Andrzej Kaczmarek <andrzej.kaczma...@codecoup.pl>
AuthorDate: Tue Oct 11 22:07:01 2022 +0200
hw/ipc_nrf5340: Add APIs to get used/free space in IPC channel
---
.../ipc_nrf5340/include/ipc_nrf5340/ipc_nrf5340.h | 26 ++++++++++++++++++++++
hw/drivers/ipc_nrf5340/src/ipc_nrf5340.c | 15 +++++++++++++
2 files changed, 41 insertions(+)
diff --git a/hw/drivers/ipc_nrf5340/include/ipc_nrf5340/ipc_nrf5340.h
b/hw/drivers/ipc_nrf5340/include/ipc_nrf5340/ipc_nrf5340.h
index d0398d518..b20ecc5a6 100644
--- a/hw/drivers/ipc_nrf5340/include/ipc_nrf5340/ipc_nrf5340.h
+++ b/hw/drivers/ipc_nrf5340/include/ipc_nrf5340/ipc_nrf5340.h
@@ -131,6 +131,32 @@ uint16_t ipc_nrf5340_available(int channel);
*/
uint16_t ipc_nrf5340_available_buf(int channel, void **dptr);
+/**
+ * Returns number of data bytes available in IPC ring buffer for reading.
+ *
+ * Note: this function does not use any kind of locking so it's up to caller
+ * to make sure it's not used during write from other context as it may
+ * yield incorrect results.
+ *
+ * @param channel IPC channel number
+ *
+ * @return Number of bytes available in IPC ring buffer
+ */
+uint16_t ipc_nrf5340_data_available_get(int channel);
+
+/**
+ * Returns number of free data bytes available in IPC ring buffer for writing.
+ *
+ * Note: this function does not use any kind of locking so it's up to caller
+ * to make sure it's not used during write from other context as it may
+ * yield incorrect results.
+ *
+ * @param channel IPC channel number
+ *
+ * @return Number of bytes available in IPC ring buffer
+ */
+uint16_t ipc_nrf5340_data_free_get(int channel);
+
/**
* Consumes data from IPC ring buffer without copying. Should be used only
* from ipc_nrf5340_recv_cb context.
diff --git a/hw/drivers/ipc_nrf5340/src/ipc_nrf5340.c
b/hw/drivers/ipc_nrf5340/src/ipc_nrf5340.c
index 45a5b6d51..53c1d8a26 100644
--- a/hw/drivers/ipc_nrf5340/src/ipc_nrf5340.c
+++ b/hw/drivers/ipc_nrf5340/src/ipc_nrf5340.c
@@ -470,6 +470,21 @@ ipc_nrf5340_available_buf(int channel, void **dptr)
return 0;
}
+uint16_t
+ipc_nrf5340_data_available_get(int channel)
+{
+ assert(channel < IPC_MAX_CHANS);
+
+ return ipc_nrf5340_shm_get_data_length(shms[channel].head,
+ shms[channel].tail);
+}
+
+uint16_t
+ipc_nrf5340_data_free_get(int channel)
+{
+ return IPC_BUF_SIZE - ipc_nrf5340_data_available_get(channel) - 1;
+}
+
uint16_t
ipc_nrf5340_consume(int channel, uint16_t len)
{
