diff mbox series

[net-next,v1,03/16] queue_api: define queue api

Message ID 20231208005250.2910004-4-almasrymina@google.com
State New
Headers show
Series [net-next,v1,01/16] net: page_pool: factor out releasing DMA from releasing the page | expand

Commit Message

Mina Almasry Dec. 8, 2023, 12:52 a.m. UTC 
This API enables the net stack to reset the queues used for devmem.

Signed-off-by: Mina Almasry <almasrymina@google.com>

---
 include/linux/netdevice.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

Comments

Jakub Kicinski Dec. 14, 2023, 1:15 a.m. UTC | #1 
On Thu,  7 Dec 2023 16:52:34 -0800 Mina Almasry wrote:
> This API enables the net stack to reset the queues used for devmem.

Nice, thanks for moving this forward. FWIW when I started hacking on it
the API looked more like:
https://github.com/kuba-moo/linux/commit/7af8abfa4fdff248e21fc76aecc334004a0f322f
which passes the config objects to the queue callbacks as an argument.
Storing in struct netdev_rx_queue makes implementing prepare / swap
harder. But that's just FYI, we can refactor later. The queue config
rabbit hole is pretty deep.
diff mbox series

Patch

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 1b935ee341b4..316f7dee86ce 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1432,6 +1432,20 @@  struct netdev_net_notifier {
  *			   struct kernel_hwtstamp_config *kernel_config,
  *			   struct netlink_ext_ack *extack);
  *	Change the hardware timestamping parameters for NIC device.
+ *
+ * void *(*ndo_queue_mem_alloc)(struct net_device *dev, int idx);
+ *	Allocate memory for an RX queue. The memory returned in the form of
+ *	a void * can be passed to ndo_queue_mem_free() for freeing or to
+ *	ndo_queue_start to create an RX queue with this memory.
+ *
+ * void	(*ndo_queue_mem_free)(struct net_device *dev, void *);
+ *	Free memory from an RX queue.
+ *
+ * int (*ndo_queue_start)(struct net_device *dev, int idx, void *);
+ *	Start an RX queue at the specified index.
+ *
+ * int (*ndo_queue_stop)(struct net_device *dev, int idx, void **);
+ *	Stop the RX queue at the specified index.
  */
 struct net_device_ops {
 	int			(*ndo_init)(struct net_device *dev);
@@ -1673,6 +1687,16 @@  struct net_device_ops {
 	int			(*ndo_hwtstamp_set)(struct net_device *dev,
 						    struct kernel_hwtstamp_config *kernel_config,
 						    struct netlink_ext_ack *extack);
+	void *			(*ndo_queue_mem_alloc)(struct net_device *dev,
+						       int idx);
+	void			(*ndo_queue_mem_free)(struct net_device *dev,
+						      void *queue_mem);
+	int			(*ndo_queue_start)(struct net_device *dev,
+						   int idx,
+						   void *queue_mem);
+	int			(*ndo_queue_stop)(struct net_device *dev,
+						  int idx,
+						  void **out_queue_mem);
 };
 
 /**