xsk: i40e: ice: ixgbe: mlx5: Rename xsk zero-copy driver interfaces

Rename the AF_XDP zero-copy driver interface functions to better
reflect what they do after the replacement of umems with buffer
pools in the previous commit. Mostly it is about replacing the
umem name from the function names with xsk_buff and also have
them take the a buffer pool pointer instead of a umem. The
various ring functions have also been renamed in the process so
that they have the same naming convention as the internal
functions in xsk_queue.h. This so that it will be clearer what
they do and also for consistency.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/1598603189-32145-3-git-send-email-magnus.karlsson@intel.com

1 files changed, 27 insertions, 18 deletions

diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index c3231620d210..befc9a4331e1 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -39,8 +39,10 @@ bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
 		READ_ONCE(xs->umem->fq);
 }
 
-void xsk_set_rx_need_wakeup(struct xdp_umem *umem)
+void xsk_set_rx_need_wakeup(struct xsk_buff_pool *pool)
 {
+	struct xdp_umem *umem = pool->umem;
+
 	if (umem->need_wakeup & XDP_WAKEUP_RX)
 		return;
 
@@ -49,8 +51,9 @@ void xsk_set_rx_need_wakeup(struct xdp_umem *umem)
 }
 EXPORT_SYMBOL(xsk_set_rx_need_wakeup);
 
-void xsk_set_tx_need_wakeup(struct xdp_umem *umem)
+void xsk_set_tx_need_wakeup(struct xsk_buff_pool *pool)
 {
+	struct xdp_umem *umem = pool->umem;
 	struct xdp_sock *xs;
 
 	if (umem->need_wakeup & XDP_WAKEUP_TX)
@@ -66,8 +69,10 @@ void xsk_set_tx_need_wakeup(struct xdp_umem *umem)
 }
 EXPORT_SYMBOL(xsk_set_tx_need_wakeup);
 
-void xsk_clear_rx_need_wakeup(struct xdp_umem *umem)
+void xsk_clear_rx_need_wakeup(struct xsk_buff_pool *pool)
 {
+	struct xdp_umem *umem = pool->umem;
+
 	if (!(umem->need_wakeup & XDP_WAKEUP_RX))
 		return;
 
@@ -76,8 +81,9 @@ void xsk_clear_rx_need_wakeup(struct xdp_umem *umem)
 }
 EXPORT_SYMBOL(xsk_clear_rx_need_wakeup);
 
-void xsk_clear_tx_need_wakeup(struct xdp_umem *umem)
+void xsk_clear_tx_need_wakeup(struct xsk_buff_pool *pool)
 {
+	struct xdp_umem *umem = pool->umem;
 	struct xdp_sock *xs;
 
 	if (!(umem->need_wakeup & XDP_WAKEUP_TX))
@@ -93,11 +99,11 @@ void xsk_clear_tx_need_wakeup(struct xdp_umem *umem)
 }
 EXPORT_SYMBOL(xsk_clear_tx_need_wakeup);
 
-bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem)
+bool xsk_uses_need_wakeup(struct xsk_buff_pool *pool)
 {
-	return umem->flags & XDP_UMEM_USES_NEED_WAKEUP;
+	return pool->umem->flags & XDP_UMEM_USES_NEED_WAKEUP;
 }
-EXPORT_SYMBOL(xsk_umem_uses_need_wakeup);
+EXPORT_SYMBOL(xsk_uses_need_wakeup);
 
 void xp_release(struct xdp_buff_xsk *xskb)
 {
@@ -155,12 +161,12 @@ static int __xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len,
 	struct xdp_buff *xsk_xdp;
 	int err;
 
-	if (len > xsk_umem_get_rx_frame_size(xs->umem)) {
+	if (len > xsk_pool_get_rx_frame_size(xs->pool)) {
 		xs->rx_dropped++;
 		return -ENOSPC;
 	}
 
-	xsk_xdp = xsk_buff_alloc(xs->umem);
+	xsk_xdp = xsk_buff_alloc(xs->pool);
 	if (!xsk_xdp) {
 		xs->rx_dropped++;
 		return -ENOSPC;
@@ -249,27 +255,28 @@ void __xsk_map_flush(void)
 	}
 }
 
-void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries)
+void xsk_tx_completed(struct xsk_buff_pool *pool, u32 nb_entries)
 {
-	xskq_prod_submit_n(umem->cq, nb_entries);
+	xskq_prod_submit_n(pool->umem->cq, nb_entries);
 }
-EXPORT_SYMBOL(xsk_umem_complete_tx);
+EXPORT_SYMBOL(xsk_tx_completed);
 
-void xsk_umem_consume_tx_done(struct xdp_umem *umem)
+void xsk_tx_release(struct xsk_buff_pool *pool)
 {
 	struct xdp_sock *xs;
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(xs, &umem->xsk_tx_list, list) {
+	list_for_each_entry_rcu(xs, &pool->umem->xsk_tx_list, list) {
 		__xskq_cons_release(xs->tx);
 		xs->sk.sk_write_space(&xs->sk);
 	}
 	rcu_read_unlock();
 }
-EXPORT_SYMBOL(xsk_umem_consume_tx_done);
+EXPORT_SYMBOL(xsk_tx_release);
 
-bool xsk_umem_consume_tx(struct xdp_umem *umem, struct xdp_desc *desc)
+bool xsk_tx_peek_desc(struct xsk_buff_pool *pool, struct xdp_desc *desc)
 {
+	struct xdp_umem *umem = pool->umem;
 	struct xdp_sock *xs;
 
 	rcu_read_lock();
@@ -296,7 +303,7 @@ out:
 	rcu_read_unlock();
 	return false;
 }
-EXPORT_SYMBOL(xsk_umem_consume_tx);
+EXPORT_SYMBOL(xsk_tx_peek_desc);
 
 static int xsk_wakeup(struct xdp_sock *xs, u8 flags)
 {
@@ -359,7 +366,7 @@ static int xsk_generic_xmit(struct sock *sk)
 
 		skb_put(skb, len);
 		addr = desc.addr;
-		buffer = xsk_buff_raw_get_data(xs->umem, addr);
+		buffer = xsk_buff_raw_get_data(xs->pool, addr);
 		err = skb_store_bits(skb, 0, buffer, len);
 		/* This is the backpressure mechanism for the Tx path.
 		 * Reserve space in the completion queue and only proceed
@@ -762,6 +769,8 @@ static int xsk_setsockopt(struct socket *sock, int level, int optname,
 			return PTR_ERR(umem);
 		}
 
+		xs->pool = umem->pool;
+
 		/* Make sure umem is ready before it can be seen by others */
 		smp_wmb();
 		WRITE_ONCE(xs->umem, umem);