[PATCH v2 03/26] event/octeontx: introduce specialized mbox message copy

[Santosh Shukla <santosh.shukla@caviumnetworks.com>]

From: Jerin Jacob <jerin.jacob@caviumnetworks.com>

Some of the internal toolchain versions create unaligned
memory access fault when copying from 17-31B buffer using memcpy.

Subsequent patches in this series will be using 17-31B mbox message.
Since the mailbox message copy comes in slow path, changing memcpy to
byte-per-byte copy to workaround the issue.

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Co-authored-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>
Signed-off-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>
---
 drivers/event/octeontx/ssovf_mbox.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/event/octeontx/ssovf_mbox.c b/drivers/event/octeontx/ssovf_mbox.c
index 764414b59..9ed417d1a 100644
--- a/drivers/event/octeontx/ssovf_mbox.c
+++ b/drivers/event/octeontx/ssovf_mbox.c
@@ -87,6 +87,16 @@ struct mbox_ram_hdr {
 	};
 };
 
+
+static inline void
+mbox_msgcpy(uint8_t *d, const uint8_t *s, uint16_t size)
+{
+	uint16_t i;
+
+	for (i = 0; i < size; i++)
+		d[i] = s[i];
+}
+
 static inline void
 mbox_send_request(struct mbox *m, struct octeontx_mbox_hdr *hdr,
 			const void *txmsg, uint16_t txsize)
@@ -106,7 +116,7 @@ mbox_send_request(struct mbox *m, struct octeontx_mbox_hdr *hdr,
 
 	/* Copy msg body */
 	if (txmsg)
-		memcpy(ram_mbox_msg, txmsg, txsize);
+		mbox_msgcpy(ram_mbox_msg, txmsg, txsize);
 
 	/* Prepare new hdr */
 	new_hdr.chan_state = MBOX_CHAN_STATE_REQ;
@@ -166,7 +176,7 @@ mbox_wait_response(struct mbox *m, struct octeontx_mbox_hdr *hdr,
 
 	len = RTE_MIN(rx_hdr.len, rxsize);
 	if (rxmsg)
-		memcpy(rxmsg, ram_mbox_msg, len);
+		mbox_msgcpy(rxmsg, ram_mbox_msg, len);
 
 	return len;
 
-- 
2.14.1