net/mlx5e: Let channels be SD-aware

Distribute the channels between the different SD-devices to acheive
local numa node performance on multiple numas.

Each channel works against one specific mdev, creating all datapath
queues against it.

We distribute channels to mdevs in a round-robin policy.

Example for 2 mdevs and 6 channels:
+-------+---------+
| ch ix | mdev ix |
+-------+---------+
|   0   |    0    |
|   1   |    1    |
|   2   |    0    |
|   3   |    1    |
|   4   |    0    |
|   5   |    1    |
+-------+---------+

This round-robin distribution policy is preferred over another suggested
intuitive distribution, in which we first distribute one half of the
channels to mdev #0 and then the second half to mdev #1.

We prefer round-robin for a reason: it is less influenced by changes in
the number of channels. The mapping between channel index and mdev is
fixed, no matter how many channels the user configures. As the channel
stats are persistent to channels closure, changing the mapping every
single time would turn the accumulative stats less representing of the
channel's history.

Per-channel objects should stop using the primary mdev (priv->mdev)
directly, and instead move to using their own channel's mdev.

Signed-off-by: Tariq Toukan <[email protected]>
Reviewed-by: Gal Pressman <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>

Author: Tariq Toukan

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

@@ -792,6 +792,7 @@ struct mlx5e_channel {
 	struct hwtstamp_config    *tstamp;
 	DECLARE_BITMAP(state, MLX5E_CHANNEL_NUM_STATES);
 	int                        ix;
+	int                        vec_ix;
 	int                        cpu;
 	/* Sync between icosq recovery and XSK enable/disable. */
 	struct mutex               icosq_recovery_lock;

drivers/net/ethernet/mellanox/mlx5/core/en/params.c

@@ -688,7 +688,7 @@ void mlx5e_build_create_cq_param(struct mlx5e_create_cq_param *ccp, struct mlx5e
 		.napi = &c->napi,
 		.ch_stats = c->stats,
 		.node = cpu_to_node(c->cpu),
-		.ix = c->ix,
+		.ix = c->vec_ix,
 	};
 }
 

drivers/net/ethernet/mellanox/mlx5/core/en/qos.c

@@ -122,8 +122,8 @@ int mlx5e_open_qos_sq(struct mlx5e_priv *priv, struct mlx5e_channels *chs,
 
 	memset(&param_sq, 0, sizeof(param_sq));
 	memset(&param_cq, 0, sizeof(param_cq));
-	mlx5e_build_sq_param(priv->mdev, params, &param_sq);
-	mlx5e_build_tx_cq_param(priv->mdev, params, &param_cq);
+	mlx5e_build_sq_param(c->mdev, params, &param_sq);
+	mlx5e_build_tx_cq_param(c->mdev, params, &param_cq);
 	err = mlx5e_open_cq(c->mdev, params->tx_cq_moderation, &param_cq, &ccp, &sq->cq);
 	if (err)
 		goto err_free_sq;
@@ -176,7 +176,7 @@ int mlx5e_activate_qos_sq(void *data, u16 node_qid, u32 hw_id)
 	 */
 	smp_wmb();
 
-	qos_dbg(priv->mdev, "Activate QoS SQ qid %u\n", node_qid);
+	qos_dbg(sq->mdev, "Activate QoS SQ qid %u\n", node_qid);
 	mlx5e_activate_txqsq(sq);
 
 	return 0;
@@ -190,7 +190,7 @@ void mlx5e_deactivate_qos_sq(struct mlx5e_priv *priv, u16 qid)
 	if (!sq) /* Handle the case when the SQ failed to open. */
 		return;
 
-	qos_dbg(priv->mdev, "Deactivate QoS SQ qid %u\n", qid);
+	qos_dbg(sq->mdev, "Deactivate QoS SQ qid %u\n", qid);
 	mlx5e_deactivate_txqsq(sq);
 
 	priv->txq2sq[mlx5e_qid_from_qos(&priv->channels, qid)] = NULL;

drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c

@@ -294,8 +294,8 @@ static void mlx5e_rx_reporter_diagnose_generic_rq(struct mlx5e_rq *rq,
 
 	params = &priv->channels.params;
 	rq_sz = mlx5e_rqwq_get_size(rq);
-	real_time =  mlx5_is_real_time_rq(priv->mdev);
-	rq_stride = BIT(mlx5e_mpwqe_get_log_stride_size(priv->mdev, params, NULL));
+	real_time =  mlx5_is_real_time_rq(rq->mdev);
+	rq_stride = BIT(mlx5e_mpwqe_get_log_stride_size(rq->mdev, params, NULL));
 
 	mlx5e_health_fmsg_named_obj_nest_start(fmsg, "RQ");
 	devlink_fmsg_u8_pair_put(fmsg, "type", params->rq_wq_type);

drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c

@@ -219,15 +219,14 @@ mlx5e_tx_reporter_build_diagnose_output_sq_common(struct devlink_fmsg *fmsg,
 						  struct mlx5e_txqsq *sq, int tc)
 {
 	bool stopped = netif_xmit_stopped(sq->txq);
-	struct mlx5e_priv *priv = sq->priv;
 	u8 state;
 	int err;
 
 	devlink_fmsg_u32_pair_put(fmsg, "tc", tc);
 	devlink_fmsg_u32_pair_put(fmsg, "txq ix", sq->txq_ix);
 	devlink_fmsg_u32_pair_put(fmsg, "sqn", sq->sqn);
 
-	err = mlx5_core_query_sq_state(priv->mdev, sq->sqn, &state);
+	err = mlx5_core_query_sq_state(sq->mdev, sq->sqn, &state);
 	if (!err)
 		devlink_fmsg_u8_pair_put(fmsg, "HW state", state);
 

drivers/net/ethernet/mellanox/mlx5/core/en/xsk/pool.c

@@ -6,10 +6,10 @@
 #include "setup.h"
 #include "en/params.h"
 
-static int mlx5e_xsk_map_pool(struct mlx5e_priv *priv,
+static int mlx5e_xsk_map_pool(struct mlx5_core_dev *mdev,
 			      struct xsk_buff_pool *pool)
 {
-	struct device *dev = mlx5_core_dma_dev(priv->mdev);
+	struct device *dev = mlx5_core_dma_dev(mdev);
 
 	return xsk_pool_dma_map(pool, dev, DMA_ATTR_SKIP_CPU_SYNC);
 }
@@ -89,7 +89,7 @@ static int mlx5e_xsk_enable_locked(struct mlx5e_priv *priv,
 	if (unlikely(!mlx5e_xsk_is_pool_sane(pool)))
 		return -EINVAL;
 
-	err = mlx5e_xsk_map_pool(priv, pool);
+	err = mlx5e_xsk_map_pool(mlx5_sd_ch_ix_get_dev(priv->mdev, ix), pool);
 	if (unlikely(err))
 		return err;
 

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_rx.c

@@ -267,7 +267,7 @@ resync_post_get_progress_params(struct mlx5e_icosq *sq,
 		goto err_out;
 	}
 
-	pdev = mlx5_core_dma_dev(sq->channel->priv->mdev);
+	pdev = mlx5_core_dma_dev(sq->channel->mdev);
 	buf->dma_addr = dma_map_single(pdev, &buf->progress,
 				       PROGRESS_PARAMS_PADDED_SIZE, DMA_FROM_DEVICE);
 	if (unlikely(dma_mapping_error(pdev, buf->dma_addr))) {
@@ -425,14 +425,12 @@ void mlx5e_ktls_handle_get_psv_completion(struct mlx5e_icosq_wqe_info *wi,
 {
 	struct mlx5e_ktls_rx_resync_buf *buf = wi->tls_get_params.buf;
 	struct mlx5e_ktls_offload_context_rx *priv_rx;
-	struct mlx5e_ktls_rx_resync_ctx *resync;
 	u8 tracker_state, auth_state, *ctx;
 	struct device *dev;
 	u32 hw_seq;
 
 	priv_rx = buf->priv_rx;
-	resync = &priv_rx->resync;
-	dev = mlx5_core_dma_dev(resync->priv->mdev);
+	dev = mlx5_core_dma_dev(sq->channel->mdev);
 	if (unlikely(test_bit(MLX5E_PRIV_RX_FLAG_DELETING, priv_rx->flags)))
 		goto out;
 

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

@@ -2529,14 +2529,20 @@ static int mlx5e_open_channel(struct mlx5e_priv *priv, int ix,
 			      struct xsk_buff_pool *xsk_pool,
 			      struct mlx5e_channel **cp)
 {
-	int cpu = mlx5_comp_vector_get_cpu(priv->mdev, ix);
 	struct net_device *netdev = priv->netdev;
+	struct mlx5_core_dev *mdev;
 	struct mlx5e_xsk_param xsk;
 	struct mlx5e_channel *c;
 	unsigned int irq;
+	int vec_ix;
+	int cpu;
 	int err;
 
-	err = mlx5_comp_irqn_get(priv->mdev, ix, &irq);
+	mdev = mlx5_sd_ch_ix_get_dev(priv->mdev, ix);
+	vec_ix = mlx5_sd_ch_ix_get_vec_ix(mdev, ix);
+	cpu = mlx5_comp_vector_get_cpu(mdev, vec_ix);
+
+	err = mlx5_comp_irqn_get(mdev, vec_ix, &irq);
 	if (err)
 		return err;
 
@@ -2549,18 +2555,19 @@ static int mlx5e_open_channel(struct mlx5e_priv *priv, int ix,
 		return -ENOMEM;
 
 	c->priv     = priv;
-	c->mdev     = priv->mdev;
+	c->mdev     = mdev;
 	c->tstamp   = &priv->tstamp;
 	c->ix       = ix;
+	c->vec_ix   = vec_ix;
 	c->cpu      = cpu;
-	c->pdev     = mlx5_core_dma_dev(priv->mdev);
+	c->pdev     = mlx5_core_dma_dev(mdev);
 	c->netdev   = priv->netdev;
-	c->mkey_be  = cpu_to_be32(priv->mdev->mlx5e_res.hw_objs.mkey);
+	c->mkey_be  = cpu_to_be32(mdev->mlx5e_res.hw_objs.mkey);
 	c->num_tc   = mlx5e_get_dcb_num_tc(params);
 	c->xdp      = !!params->xdp_prog;
 	c->stats    = &priv->channel_stats[ix]->ch;
 	c->aff_mask = irq_get_effective_affinity_mask(irq);
-	c->lag_port = mlx5e_enumerate_lag_port(priv->mdev, ix);
+	c->lag_port = mlx5e_enumerate_lag_port(mdev, ix);
 
 	netif_napi_add(netdev, &c->napi, mlx5e_napi_poll);
 	netif_napi_set_irq(&c->napi, irq);
@@ -2943,15 +2950,18 @@ static MLX5E_DEFINE_PREACTIVATE_WRAPPER_CTX(mlx5e_update_netdev_queues);
 static void mlx5e_set_default_xps_cpumasks(struct mlx5e_priv *priv,
 					   struct mlx5e_params *params)
 {
-	struct mlx5_core_dev *mdev = priv->mdev;
-	int num_comp_vectors, ix, irq;
-
-	num_comp_vectors = mlx5_comp_vectors_max(mdev);
+	int ix;
 
 	for (ix = 0; ix < params->num_channels; ix++) {
+		int num_comp_vectors, irq, vec_ix;
+		struct mlx5_core_dev *mdev;
+
+		mdev = mlx5_sd_ch_ix_get_dev(priv->mdev, ix);
+		num_comp_vectors = mlx5_comp_vectors_max(mdev);
 		cpumask_clear(priv->scratchpad.cpumask);
+		vec_ix = mlx5_sd_ch_ix_get_vec_ix(mdev, ix);
 
-		for (irq = ix; irq < num_comp_vectors; irq += params->num_channels) {
+		for (irq = vec_ix; irq < num_comp_vectors; irq += params->num_channels) {
 			int cpu = mlx5_comp_vector_get_cpu(mdev, irq);
 
 			cpumask_set_cpu(cpu, priv->scratchpad.cpumask);