Merge branch 'mana-jumbo-frames'

Haiyang Zhang says:

====================
net: mana: Add support for jumbo frame

The set adds support for jumbo frame,
with some optimization for the RX path.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microsoft/mana/mana_bpf.c

@@ -133,12 +133,6 @@ u32 mana_run_xdp(struct net_device *ndev, struct mana_rxq *rxq,
 	return act;
 }
 
-static unsigned int mana_xdp_fraglen(unsigned int len)
-{
-	return SKB_DATA_ALIGN(len) +
-	       SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
-}
-
 struct bpf_prog *mana_xdp_get(struct mana_port_context *apc)
 {
 	ASSERT_RTNL();
@@ -179,17 +173,18 @@ static int mana_xdp_set(struct net_device *ndev, struct bpf_prog *prog,
 {
 	struct mana_port_context *apc = netdev_priv(ndev);
 	struct bpf_prog *old_prog;
-	int buf_max;
+	struct gdma_context *gc;
+
+	gc = apc->ac->gdma_dev->gdma_context;
 
 	old_prog = mana_xdp_get(apc);
 
 	if (!old_prog && !prog)
 		return 0;
 
-	buf_max = XDP_PACKET_HEADROOM + mana_xdp_fraglen(ndev->mtu + ETH_HLEN);
-	if (prog && buf_max > PAGE_SIZE) {
-		netdev_err(ndev, "XDP: mtu:%u too large, buf_max:%u\n",
-			   ndev->mtu, buf_max);
+	if (prog && ndev->mtu > MANA_XDP_MTU_MAX) {
+		netdev_err(ndev, "XDP: mtu:%u too large, mtu_max:%lu\n",
+			   ndev->mtu, MANA_XDP_MTU_MAX);
 		NL_SET_ERR_MSG_MOD(extack, "XDP: mtu too large");
 
 		return -EOPNOTSUPP;
@@ -206,6 +201,11 @@ static int mana_xdp_set(struct net_device *ndev, struct bpf_prog *prog,
 	if (apc->port_is_up)
 		mana_chn_setxdp(apc, prog);
 
+	if (prog)
+		ndev->max_mtu = MANA_XDP_MTU_MAX;
+	else
+		ndev->max_mtu = gc->adapter_mtu - ETH_HLEN;
+
 	return 0;
 }
 

include/net/mana/gdma.h

@@ -145,6 +145,7 @@ struct gdma_general_req {
 }; /* HW DATA */
 
 #define GDMA_MESSAGE_V1 1
+#define GDMA_MESSAGE_V2 2
 
 struct gdma_general_resp {
 	struct gdma_resp_hdr hdr;
@@ -354,6 +355,9 @@ struct gdma_context {
 	struct gdma_resource	msix_resource;
 	struct gdma_irq_context	*irq_contexts;
 
+	/* L2 MTU */
+	u16 adapter_mtu;
+
 	/* This maps a CQ index to the queue structure. */
 	unsigned int		max_num_cqs;
 	struct gdma_queue	**cq_table;

include/net/mana/mana.h

@@ -36,10 +36,8 @@ enum TRI_STATE {
 
 #define COMP_ENTRY_SIZE 64
 
-#define ADAPTER_MTU_SIZE 1500
-#define MAX_FRAME_SIZE (ADAPTER_MTU_SIZE + 14)
-
 #define RX_BUFFERS_PER_QUEUE 512
+#define MANA_RX_DATA_ALIGN 64
 
 #define MAX_SEND_BUFFERS_PER_QUEUE 256
 
@@ -282,7 +280,6 @@ struct mana_recv_buf_oob {
 	struct gdma_wqe_request wqe_req;
 
 	void *buf_va;
-	dma_addr_t buf_dma_addr;
 
 	/* SGL of the buffer going to be sent has part of the work request. */
 	u32 num_sge;
@@ -295,6 +292,11 @@ struct mana_recv_buf_oob {
 	struct gdma_posted_wqe_info wqe_inf;
 };
 
+#define MANA_RXBUF_PAD (SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) \
+			+ ETH_HLEN)
+
+#define MANA_XDP_MTU_MAX (PAGE_SIZE - MANA_RXBUF_PAD - XDP_PACKET_HEADROOM)
+
 struct mana_rxq {
 	struct gdma_queue *gdma_rq;
 	/* Cache the gdma receive queue id */
@@ -304,6 +306,8 @@ struct mana_rxq {
 	u32 rxq_idx;
 
 	u32 datasize;
+	u32 alloc_size;
+	u32 headroom;
 
 	mana_handle_t rxobj;
 
@@ -322,7 +326,7 @@ struct mana_rxq {
 
 	struct bpf_prog __rcu *bpf_prog;
 	struct xdp_rxq_info xdp_rxq;
-	struct page *xdp_save_page;
+	void *xdp_save_va; /* for reusing */
 	bool xdp_flush;
 	int xdp_rc; /* XDP redirect return code */
 
@@ -387,6 +391,14 @@ struct mana_port_context {
 	/* This points to an array of num_queues of RQ pointers. */
 	struct mana_rxq **rxqs;
 
+	/* pre-allocated rx buffer array */
+	void **rxbufs_pre;
+	dma_addr_t *das_pre;
+	int rxbpre_total;
+	u32 rxbpre_datasize;
+	u32 rxbpre_alloc_size;
+	u32 rxbpre_headroom;
+
 	struct bpf_prog *bpf_prog;
 
 	/* Create num_queues EQs, SQs, SQ-CQs, RQs and RQ-CQs, respectively. */
@@ -486,6 +498,11 @@ struct mana_query_device_cfg_resp {
 	u16 max_num_vports;
 	u16 reserved;
 	u32 max_num_eqs;
+
+	/* response v2: */
+	u16 adapter_mtu;
+	u16 reserved2;
+	u32 reserved3;
 }; /* HW DATA */
 
 /* Query vPort Configuration */