net/mlx5e: Different SQ types

Different SQ types (tx, xdp, ico) are growing apart, we separate them
and remove unwanted parts in each one of them, to simplify data path and
utilize data cache.

Remove DB union from SQ structures since it is not needed anymore as we
now have different SQ data type for each SQ.

Signed-off-by: Saeed Mahameed <[email protected]>
Reviewed-by: Tariq Toukan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Saeed Mahameed

drivers/net/ethernet/mellanox/mlx5/core/en.h

@@ -319,13 +319,7 @@ struct mlx5e_sq_wqe_info {
 	u8  num_wqebbs;
 };
 
-enum mlx5e_sq_type {
-	MLX5E_SQ_TXQ,
-	MLX5E_SQ_ICO,
-	MLX5E_SQ_XDP
-};
-
-struct mlx5e_sq {
+struct mlx5e_txqsq {
 	/* data path */
 
 	/* dirtied @completion */
@@ -339,18 +333,11 @@ struct mlx5e_sq {
 
 	struct mlx5e_cq            cq;
 
-	/* pointers to per tx element info: write@xmit, read@completion */
-	union {
-		struct {
-			struct sk_buff           **skb;
-			struct mlx5e_sq_dma       *dma_fifo;
-			struct mlx5e_tx_wqe_info  *wqe_info;
-		} txq;
-		struct mlx5e_sq_wqe_info *ico_wqe;
-		struct {
-			struct mlx5e_dma_info     *di;
-			bool                       doorbell;
-		} xdp;
+	/* write@xmit, read@completion */
+	struct {
+		struct sk_buff           **skb;
+		struct mlx5e_sq_dma       *dma_fifo;
+		struct mlx5e_tx_wqe_info  *wqe_info;
 	} db;
 
 	/* read only */
@@ -372,7 +359,67 @@ struct mlx5e_sq {
 	struct mlx5e_channel      *channel;
 	int                        tc;
 	u32                        rate_limit;
-	u8                         type;
+} ____cacheline_aligned_in_smp;
+
+struct mlx5e_xdpsq {
+	/* data path */
+
+	/* dirtied @rx completion */
+	u16                        cc;
+	u16                        pc;
+
+	struct mlx5e_cq            cq;
+
+	/* write@xmit, read@completion */
+	struct {
+		struct mlx5e_dma_info     *di;
+		bool                       doorbell;
+	} db;
+
+	/* read only */
+	struct mlx5_wq_cyc         wq;
+	void __iomem              *uar_map;
+	u32                        sqn;
+	struct device             *pdev;
+	__be32                     mkey_be;
+	u8                         min_inline_mode;
+	unsigned long              state;
+
+	/* control path */
+	struct mlx5_wq_ctrl        wq_ctrl;
+	struct mlx5e_channel      *channel;
+} ____cacheline_aligned_in_smp;
+
+struct mlx5e_icosq {
+	/* data path */
+
+	/* dirtied @completion */
+	u16                        cc;
+
+	/* dirtied @xmit */
+	u16                        pc ____cacheline_aligned_in_smp;
+	u32                        dma_fifo_pc;
+	u16                        prev_cc;
+
+	struct mlx5e_cq            cq;
+
+	/* write@xmit, read@completion */
+	struct {
+		struct mlx5e_sq_wqe_info *ico_wqe;
+	} db;
+
+	/* read only */
+	struct mlx5_wq_cyc         wq;
+	void __iomem              *uar_map;
+	u32                        sqn;
+	u16                        edge;
+	struct device             *pdev;
+	__be32                     mkey_be;
+	unsigned long              state;
+
+	/* control path */
+	struct mlx5_wq_ctrl        wq_ctrl;
+	struct mlx5e_channel      *channel;
 } ____cacheline_aligned_in_smp;
 
 static inline bool
@@ -477,7 +524,7 @@ struct mlx5e_rq {
 
 	/* XDP */
 	struct bpf_prog       *xdp_prog;
-	struct mlx5e_sq        xdpsq;
+	struct mlx5e_xdpsq     xdpsq;
 
 	/* control */
 	struct mlx5_wq_ctrl    wq_ctrl;
@@ -497,8 +544,8 @@ enum channel_flags {
 struct mlx5e_channel {
 	/* data path */
 	struct mlx5e_rq            rq;
-	struct mlx5e_sq            sq[MLX5E_MAX_NUM_TC];
-	struct mlx5e_sq            icosq;   /* internal control operations */
+	struct mlx5e_txqsq         sq[MLX5E_MAX_NUM_TC];
+	struct mlx5e_icosq         icosq;   /* internal control operations */
 	bool                       xdp;
 	struct napi_struct         napi;
 	struct device             *pdev;
@@ -680,7 +727,7 @@ struct mlx5e_profile {
 
 struct mlx5e_priv {
 	/* priv data path fields - start */
-	struct mlx5e_sq            **txq_to_sq_map;
+	struct mlx5e_txqsq         **txq_to_sq_map;
 	int channeltc_to_txq_map[MLX5E_MAX_NUM_CHANNELS][MLX5E_MAX_NUM_TC];
 	struct bpf_prog *xdp_prog;
 	/* priv data path fields - end */
@@ -731,8 +778,8 @@ int mlx5e_napi_poll(struct napi_struct *napi, int budget);
 bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget);
 int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget);
 bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq);
-void mlx5e_free_xdpsq_descs(struct mlx5e_sq *sq);
-void mlx5e_free_sq_descs(struct mlx5e_sq *sq);
+void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq);
+void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq);
 
 void mlx5e_page_release(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info,
 			bool recycle);