soc/intel/cmn/cse: Make heci_(send|receive) public functions

Having these two functions public allow "asynchronous"
HECI command implementation.

Typically, these function can be use to implement an asynchronous
End-Of-Post.

BUG=b:268546941
BRANCH=firmware-brya-14505.B
TEST=Successful compilation for brya0

Change-Id: I7d029bb9af4b53f219018e459d17df9c1bd33fc1
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73710
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>

src/soc/intel/common/block/cse/cse.c

@@ -422,12 +422,7 @@ send_one_message(uint32_t hdr, const void *buff)
 	return pend_len;
 }
 
-/*
+enum cse_tx_rx_status
- * Send message msg of size len to host from host_addr to cse_addr.
- * Returns CSE_TX_RX_SUCCESS on success and other enum values on failure scenarios.
- * Also, in case of errors, heci_reset() is triggered.
- */
-static enum cse_tx_rx_status
 heci_send(const void *msg, size_t len, uint8_t host_addr, uint8_t client_addr)
 {
 	uint8_t retry;
@@ -532,15 +527,7 @@ recv_one_message(uint32_t *hdr, void *buff, size_t maxlen, size_t *recv_len)
 	return CSE_TX_RX_SUCCESS;
 }
 
-/*
+enum cse_tx_rx_status heci_receive(void *buff, size_t *maxlen)
- * Receive message into buff not exceeding maxlen. Message is considered
- * successfully received if a 'complete' indication is read from ME side
- * and there was enough space in the buffer to fit that message. maxlen
- * is updated with size of message that was received.
- * Returns CSE_TX_RX_SUCCESS on success and other enum values on failure scenarios.
- * Also, in case of errors, heci_reset() is triggered.
- */
-static enum cse_tx_rx_status heci_receive(void *buff, size_t *maxlen)
 {
 	uint8_t retry;
 	size_t left, received;

src/soc/intel/common/block/include/intelblocks/cse.h

@@ -344,6 +344,24 @@ void cse_init(uintptr_t bar);
 /* Initialize the HECI devices. */
 void heci_init(void);
 
+/*
+ * Send message msg of size len to host from host_addr to cse_addr.
+ * Returns CSE_TX_RX_SUCCESS on success and other enum values on failure scenarios.
+ * Also, in case of errors, heci_reset() is triggered.
+ */
+enum cse_tx_rx_status heci_send(const void *msg, size_t len, uint8_t host_addr,
+				uint8_t client_addr);
+
+/*
+ * Receive message into buff not exceeding maxlen. Message is considered
+ * successfully received if a 'complete' indication is read from ME side
+ * and there was enough space in the buffer to fit that message. maxlen
+ * is updated with size of message that was received.
+ * Returns CSE_TX_RX_SUCCESS on success and other enum values on failure scenarios.
+ * Also, in case of errors, heci_reset() is triggered.
+ */
+enum cse_tx_rx_status heci_receive(void *buff, size_t *maxlen);
+
 /*
  * Send message from BIOS_HOST_ADDR to cse_addr.
  * Sends snd_msg of size snd_sz, and reads message into buffer pointed by