linux-kernel - [PATCH 1/6] can: rx-offload: can_rx_offload_add_manual(): add new initialization function

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Date:   Thu, 10 Sep 2020 19:08:01 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     wg@...ndegger.com, mkl@...gutronix.de, robh+dt@...nel.org
Cc:     linux-can@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dev.kurt@...dijck-laurijssen.be,
        o.rempel@...gutronix.de,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH 1/6] can: rx-offload: can_rx_offload_add_manual(): add new initialization function

From: Marc Kleine-Budde <mkl@...gutronix.de>

This patch adds a new initialization function:
can_rx_offload_add_manual()

It should be used to add support rx-offload to a driver, if the callback
mechanism should not be used. Use e.g. can_rx_offload_queue_sorted() to queue
skbs into rx-offload.

Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/net/can/rx-offload.c   | 11 +++++++++++
 include/linux/can/rx-offload.h |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/drivers/net/can/rx-offload.c b/drivers/net/can/rx-offload.c
index e8328910a234..3b180269a92d 100644
--- a/drivers/net/can/rx-offload.c
+++ b/drivers/net/can/rx-offload.c
@@ -351,6 +351,17 @@ int can_rx_offload_add_fifo(struct net_device *dev,
 }
 EXPORT_SYMBOL_GPL(can_rx_offload_add_fifo);
 
+int can_rx_offload_add_manual(struct net_device *dev,
+			      struct can_rx_offload *offload,
+			      unsigned int weight)
+{
+	if (offload->mailbox_read)
+		return -EINVAL;
+
+	return can_rx_offload_init_queue(dev, offload, weight);
+}
+EXPORT_SYMBOL_GPL(can_rx_offload_add_manual);
+
 void can_rx_offload_enable(struct can_rx_offload *offload)
 {
 	napi_enable(&offload->napi);
diff --git a/include/linux/can/rx-offload.h b/include/linux/can/rx-offload.h
index 1b78a0cfb615..f1b38088b765 100644
--- a/include/linux/can/rx-offload.h
+++ b/include/linux/can/rx-offload.h
@@ -35,6 +35,9 @@ int can_rx_offload_add_timestamp(struct net_device *dev,
 int can_rx_offload_add_fifo(struct net_device *dev,
 			    struct can_rx_offload *offload,
 			    unsigned int weight);
+int can_rx_offload_add_manual(struct net_device *dev,
+			      struct can_rx_offload *offload,
+			      unsigned int weight);
 int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload,
 					 u64 reg);
 int can_rx_offload_irq_offload_fifo(struct can_rx_offload *offload);
-- 
2.17.1