netdev - [PATCH wpan-next v4 06/11] net: ieee802154: at86rf230: Error out upon failed offloaded transmissions

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Date:   Fri, 18 Mar 2022 19:56:39 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        linux-wpan@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        David Girault <david.girault@...vo.com>,
        Romuald Despres <romuald.despres@...vo.com>,
        Frederic Blain <frederic.blain@...vo.com>,
        Nicolas Schodet <nico@...fr.eu.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH wpan-next v4 06/11] net: ieee802154: at86rf230: Error out upon failed offloaded transmissions

Let's parse the TRAC register in the Tx path in order to know if the
offloaded transmission was successful. If not, let's return early with
an error code.

Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
---
 drivers/net/ieee802154/at86rf230.c | 10 +++++++++-
 drivers/net/ieee802154/at86rf230.h |  8 ++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c
index 8a03722cd1f7..d3cf6d23b57e 100644
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -660,8 +660,16 @@ at86rf230_tx_trac_check(void *context)
 {
 	struct at86rf230_state_change *ctx = context;
 	struct at86rf230_local *lp = ctx->lp;
+	u8 trac = TRAC_MASK(ctx->buf[1]);
 
-	at86rf230_async_state_change(lp, ctx, STATE_TX_ON, at86rf230_tx_on);
+	switch (trac) {
+	case TRAC_SUCCESS:
+	case TRAC_SUCCESS_DATA_PENDING:
+		at86rf230_async_state_change(lp, ctx, STATE_TX_ON, at86rf230_tx_on);
+		break;
+	default:
+		at86rf230_async_error(lp, ctx, -EIO);
+	}
 }
 
 static void
diff --git a/drivers/net/ieee802154/at86rf230.h b/drivers/net/ieee802154/at86rf230.h
index fbdfb705c7a3..042bb27287a3 100644
--- a/drivers/net/ieee802154/at86rf230.h
+++ b/drivers/net/ieee802154/at86rf230.h
@@ -208,5 +208,13 @@
 #define STATE_TRANSITION_IN_PROGRESS 0x1F
 
 #define TRX_STATE_MASK		(0x1F)
+#define TRAC_MASK(x)		((x & 0xe0) >> 5)
+
+#define TRAC_SUCCESS			0
+#define TRAC_SUCCESS_DATA_PENDING	1
+#define TRAC_SUCCESS_WAIT_FOR_ACK	2
+#define TRAC_CHANNEL_ACCESS_FAILURE	3
+#define TRAC_NO_ACK			5
+#define TRAC_INVALID			7
 
 #endif /* !_AT86RF230_H */
-- 
2.27.0