Merge branch 'rswitch-jumbo-frames'

Yoshihiro Shimoda says:

====================
net: rswitch: Add jumbo frames support

This patch series is based on the latest net-next.git / main branch.

Changes from v3:
https://lore.kernel.org/all/20231204012058.3876078-1-yoshihiro.shimoda.uh@renesas.com/
 - Based on the latest net-next.git / main branch.
 - Modify for code consistancy in the patch 3/9.
 - Add a condition in the patch 3/9.
 - Fix usage of dma_addr in the patch 8/9.

Changes from v2:
https://lore.kernel.org/all/20231201054655.3731772-1-yoshihiro.shimoda.uh@renesas.com/
 - Based on the latest net-next.git / main branch.
 - Fix using a variable in the patch 8/9.
 - Add Reviewed-by tag in the patch 1/9.

Changes from v1:
https://lore.kernel.org/all/20231127115334.3670790-1-yoshihiro.shimoda.uh@renesas.com/
 - Based on the latest net-next.git / main branch.
 - Fix commit descriptions (s/near the future/the near future/).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/rswitch.h

@@ -26,11 +26,17 @@
 		else
 
 #define TX_RING_SIZE		1024
-#define RX_RING_SIZE		1024
+#define RX_RING_SIZE		4096
 #define TS_RING_SIZE		(TX_RING_SIZE * RSWITCH_NUM_PORTS)
 
-#define PKT_BUF_SZ		1584
+#define RSWITCH_MAX_MTU		9600
+#define RSWITCH_HEADROOM	(NET_SKB_PAD + NET_IP_ALIGN)
+#define RSWITCH_DESC_BUF_SIZE	2048
+#define RSWITCH_TAILROOM	SKB_DATA_ALIGN(sizeof(struct skb_shared_info))
 #define RSWITCH_ALIGN		128
+#define RSWITCH_BUF_SIZE	(RSWITCH_HEADROOM + RSWITCH_DESC_BUF_SIZE + \
+				 RSWITCH_TAILROOM + RSWITCH_ALIGN)
+#define RSWITCH_MAP_BUF_SIZE	(RSWITCH_BUF_SIZE - RSWITCH_HEADROOM)
 #define RSWITCH_MAX_CTAG_PCP	7
 
 #define RSWITCH_TIMEOUT_US	100000
@@ -768,6 +774,10 @@ enum rswitch_gwca_mode {
 #define GWARIRM_ARIOG		BIT(0)
 #define GWARIRM_ARR		BIT(1)
 
+#define GWMDNC_TSDMN(num)	(((num) << 16) & GENMASK(17, 16))
+#define GWMDNC_TXDMN(num)	(((num) << 8) & GENMASK(12, 8))
+#define GWMDNC_RXDMN(num)	((num) & GENMASK(4, 0))
+
 #define GWDCC_BALR		BIT(24)
 #define GWDCC_DCP_MASK		GENMASK(18, 16)
 #define GWDCC_DCP(prio)		FIELD_PREP(GWDCC_DCP_MASK, (prio))
@@ -909,7 +919,7 @@ struct rswitch_ext_ts_desc {
 } __packed;
 
 struct rswitch_etha {
-	int index;
+	unsigned int index;
 	void __iomem *addr;
 	void __iomem *coma_addr;
 	bool external_phy;
@@ -938,15 +948,28 @@ struct rswitch_gwca_queue {
 
 	/* Common */
 	dma_addr_t ring_dma;
-	int ring_size;
-	int cur;
-	int dirty;
+	unsigned int ring_size;
+	unsigned int cur;
+	unsigned int dirty;
 
-	/* For [rt]_ring */
-	int index;
+	/* For [rt]x_ring */
+	unsigned int index;
 	bool dir_tx;
-	struct sk_buff **skbs;
 	struct net_device *ndev;	/* queue to ndev for irq */
+
+	union {
+		/* For TX */
+		struct {
+			struct sk_buff **skbs;
+			dma_addr_t *unmap_addrs;
+		};
+		/* For RX */
+		struct {
+			void **rx_bufs;
+			struct sk_buff *skb_fstart;
+			u16 pkt_len;
+		};
+	};
 };
 
 struct rswitch_gwca_ts_info {
@@ -959,7 +982,7 @@ struct rswitch_gwca_ts_info {
 
 #define RSWITCH_NUM_IRQ_REGS	(RSWITCH_MAX_NUM_QUEUES / BITS_PER_TYPE(u32))
 struct rswitch_gwca {
-	int index;
+	unsigned int index;
 	struct rswitch_desc *linkfix_table;
 	dma_addr_t linkfix_table_dma;
 	u32 linkfix_table_size;