Merge tag 'mlx5-dr-2021-01-29' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-dr-2021-01-29

Add support for Connect-X6DX Software steering

This series adds SW Steering support for Connect-X6DX.

Since the STE and actions formats are different on this new HW,
we implemented the HW specific STEv1 layer on the infrastructure
implemented in previous mlx5 DR patchset to support all the
functionalities as previous devices.

Most of the code in this series very is low level HW specific, we
implement the function pointers for the generic SW steering layer.

* tag 'mlx5-dr-2021-01-29' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5: DR, Allow SW steering for sw_owner_v2 devices
  net/mlx5: DR, Copy all 64B whenever replacing STE in the head of miss-list
  net/mlx5: DR, Use HW specific logic API when writing STE
  net/mlx5: DR, Use the right size when writing partial STE into HW
  net/mlx5: DR, Add STEv1 modify header logic
  net/mlx5: DR, Add STEv1 action apply logic
  net/mlx5: DR, Add STEv1 setters and getters
  net/mlx5: DR, Allow native protocol support for HW STEv1
  net/mlx5: DR, Add HW STEv1 match logic
  net/mlx5: DR, Add match STEv1 structs to ifc
  net/mlx5: DR, Fix potential shift wrapping of 32-bit value
====================

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

drivers/net/ethernet/mellanox/mlx5/core/Makefile

@@ -85,7 +85,7 @@ mlx5_core-$(CONFIG_MLX5_SW_STEERING) += steering/dr_domain.o steering/dr_table.o
 					steering/dr_matcher.o steering/dr_rule.o \
 					steering/dr_icm_pool.o steering/dr_buddy.o \
 					steering/dr_ste.o steering/dr_send.o \
-					steering/dr_ste_v0.o \
+					steering/dr_ste_v0.o steering/dr_ste_v1.o \
 					steering/dr_cmd.o steering/dr_fw.o \
 					steering/dr_action.o steering/fs_dr.o
 #

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_cmd.c

@@ -78,9 +78,9 @@ int mlx5dr_cmd_query_esw_caps(struct mlx5_core_dev *mdev,
 	caps->uplink_icm_address_tx =
 		MLX5_CAP64_ESW_FLOWTABLE(mdev,
 					 sw_steering_uplink_icm_address_tx);
-	caps->sw_owner =
-		MLX5_CAP_ESW_FLOWTABLE_FDB(mdev,
-					   sw_owner);
+	caps->sw_owner_v2 = MLX5_CAP_ESW_FLOWTABLE_FDB(mdev, sw_owner_v2);
+	if (!caps->sw_owner_v2)
+		caps->sw_owner = MLX5_CAP_ESW_FLOWTABLE_FDB(mdev, sw_owner);
 
 	return 0;
 }
@@ -113,10 +113,15 @@ int mlx5dr_cmd_query_device(struct mlx5_core_dev *mdev,
 	caps->nic_tx_allow_address =
 		MLX5_CAP64_FLOWTABLE(mdev, sw_steering_nic_tx_action_allow_icm_address);
 
-	caps->rx_sw_owner = MLX5_CAP_FLOWTABLE_NIC_RX(mdev, sw_owner);
-	caps->max_ft_level = MLX5_CAP_FLOWTABLE_NIC_RX(mdev, max_ft_level);
+	caps->rx_sw_owner_v2 = MLX5_CAP_FLOWTABLE_NIC_RX(mdev, sw_owner_v2);
+	caps->tx_sw_owner_v2 = MLX5_CAP_FLOWTABLE_NIC_TX(mdev, sw_owner_v2);
+
+	if (!caps->rx_sw_owner_v2)
+		caps->rx_sw_owner = MLX5_CAP_FLOWTABLE_NIC_RX(mdev, sw_owner);
+	if (!caps->tx_sw_owner_v2)
+		caps->tx_sw_owner = MLX5_CAP_FLOWTABLE_NIC_TX(mdev, sw_owner);
 
-	caps->tx_sw_owner = MLX5_CAP_FLOWTABLE_NIC_TX(mdev, sw_owner);
+	caps->max_ft_level = MLX5_CAP_FLOWTABLE_NIC_RX(mdev, max_ft_level);
 
 	caps->log_icm_size = MLX5_CAP_DEV_MEM(mdev, log_steering_sw_icm_size);
 	caps->hdr_modify_icm_addr =

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_domain.c

@@ -4,6 +4,11 @@
 #include <linux/mlx5/eswitch.h>
 #include "dr_types.h"
 
+#define DR_DOMAIN_SW_STEERING_SUPPORTED(dmn, dmn_type)	\
+	((dmn)->info.caps.dmn_type##_sw_owner ||	\
+	 ((dmn)->info.caps.dmn_type##_sw_owner_v2 &&	\
+	  (dmn)->info.caps.sw_format_ver <= MLX5_STEERING_FORMAT_CONNECTX_6DX))
+
 static int dr_domain_init_cache(struct mlx5dr_domain *dmn)
 {
 	/* Per vport cached FW FT for checksum recalculation, this
@@ -187,6 +192,7 @@ static int dr_domain_query_fdb_caps(struct mlx5_core_dev *mdev,
 		return ret;
 
 	dmn->info.caps.fdb_sw_owner = dmn->info.caps.esw_caps.sw_owner;
+	dmn->info.caps.fdb_sw_owner_v2 = dmn->info.caps.esw_caps.sw_owner_v2;
 	dmn->info.caps.esw_rx_drop_address = dmn->info.caps.esw_caps.drop_icm_address_rx;
 	dmn->info.caps.esw_tx_drop_address = dmn->info.caps.esw_caps.drop_icm_address_tx;
 
@@ -229,18 +235,13 @@ static int dr_domain_caps_init(struct mlx5_core_dev *mdev,
 	if (ret)
 		return ret;
 
-	if (dmn->info.caps.sw_format_ver != MLX5_STEERING_FORMAT_CONNECTX_5) {
-		mlx5dr_err(dmn, "SW steering is not supported on this device\n");
-		return -EOPNOTSUPP;
-	}
-
 	ret = dr_domain_query_fdb_caps(mdev, dmn);
 	if (ret)
 		return ret;
 
 	switch (dmn->type) {
 	case MLX5DR_DOMAIN_TYPE_NIC_RX:
-		if (!dmn->info.caps.rx_sw_owner)
+		if (!DR_DOMAIN_SW_STEERING_SUPPORTED(dmn, rx))
 			return -ENOTSUPP;
 
 		dmn->info.supp_sw_steering = true;
@@ -249,7 +250,7 @@ static int dr_domain_caps_init(struct mlx5_core_dev *mdev,
 		dmn->info.rx.drop_icm_addr = dmn->info.caps.nic_rx_drop_address;
 		break;
 	case MLX5DR_DOMAIN_TYPE_NIC_TX:
-		if (!dmn->info.caps.tx_sw_owner)
+		if (!DR_DOMAIN_SW_STEERING_SUPPORTED(dmn, tx))
 			return -ENOTSUPP;
 
 		dmn->info.supp_sw_steering = true;
@@ -261,7 +262,7 @@ static int dr_domain_caps_init(struct mlx5_core_dev *mdev,
 		if (!dmn->info.caps.eswitch_manager)
 			return -ENOTSUPP;
 
-		if (!dmn->info.caps.fdb_sw_owner)
+		if (!DR_DOMAIN_SW_STEERING_SUPPORTED(dmn, fdb))
 			return -ENOTSUPP;
 
 		dmn->info.rx.ste_type = MLX5DR_STE_TYPE_RX;

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_matcher.c

@@ -113,7 +113,8 @@ dr_mask_is_vxlan_gpe_set(struct mlx5dr_match_misc3 *misc3)
 static bool
 dr_matcher_supp_vxlan_gpe(struct mlx5dr_cmd_caps *caps)
 {
-	return caps->flex_protocols & MLX5_FLEX_PARSER_VXLAN_GPE_ENABLED;
+	return (caps->sw_format_ver == MLX5_STEERING_FORMAT_CONNECTX_6DX) ||
+	       (caps->flex_protocols & MLX5_FLEX_PARSER_VXLAN_GPE_ENABLED);
 }
 
 static bool
@@ -135,7 +136,8 @@ static bool dr_mask_is_tnl_geneve_set(struct mlx5dr_match_misc *misc)
 static bool
 dr_matcher_supp_tnl_geneve(struct mlx5dr_cmd_caps *caps)
 {
-	return caps->flex_protocols & MLX5_FLEX_PARSER_GENEVE_ENABLED;
+	return (caps->sw_format_ver == MLX5_STEERING_FORMAT_CONNECTX_6DX) ||
+	       (caps->flex_protocols & MLX5_FLEX_PARSER_GENEVE_ENABLED);
 }
 
 static bool
@@ -148,12 +150,14 @@ dr_mask_is_tnl_geneve(struct mlx5dr_match_param *mask,
 
 static int dr_matcher_supp_icmp_v4(struct mlx5dr_cmd_caps *caps)
 {
-	return caps->flex_protocols & MLX5_FLEX_PARSER_ICMP_V4_ENABLED;
+	return (caps->sw_format_ver == MLX5_STEERING_FORMAT_CONNECTX_6DX) ||
+	       (caps->flex_protocols & MLX5_FLEX_PARSER_ICMP_V4_ENABLED);
 }
 
 static int dr_matcher_supp_icmp_v6(struct mlx5dr_cmd_caps *caps)
 {
-	return caps->flex_protocols & MLX5_FLEX_PARSER_ICMP_V6_ENABLED;
+	return (caps->sw_format_ver == MLX5_STEERING_FORMAT_CONNECTX_6DX) ||
+	       (caps->flex_protocols & MLX5_FLEX_PARSER_ICMP_V6_ENABLED);
 }
 
 static bool dr_mask_is_icmpv6_set(struct mlx5dr_match_misc3 *misc3)

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c

@@ -30,7 +30,7 @@ static int dr_rule_append_to_miss_list(struct mlx5dr_ste_ctx *ste_ctx,
 				 mlx5dr_ste_get_icm_addr(new_last_ste));
 	list_add_tail(&new_last_ste->miss_list_node, miss_list);
 
-	mlx5dr_send_fill_and_append_ste_send_info(last_ste, DR_STE_SIZE_REDUCED,
+	mlx5dr_send_fill_and_append_ste_send_info(last_ste, DR_STE_SIZE_CTRL,
 						  0, last_ste->hw_ste,
 						  ste_info_last, send_list, true);
 
@@ -106,14 +106,19 @@ dr_rule_handle_one_ste_in_update_list(struct mlx5dr_ste_send_info *ste_info,
 	int ret;
 
 	list_del(&ste_info->send_list);
+
+	/* Copy data to ste, only reduced size or control, the last 16B (mask)
+	 * is already written to the hw.
+	 */
+	if (ste_info->size == DR_STE_SIZE_CTRL)
+		memcpy(ste_info->ste->hw_ste, ste_info->data, DR_STE_SIZE_CTRL);
+	else
+		memcpy(ste_info->ste->hw_ste, ste_info->data, DR_STE_SIZE_REDUCED);
+
 	ret = mlx5dr_send_postsend_ste(dmn, ste_info->ste, ste_info->data,
 				       ste_info->size, ste_info->offset);
 	if (ret)
 		goto out;
-	/* Copy data to ste, only reduced size, the last 16B (mask)
-	 * is already written to the hw.
-	 */
-	memcpy(ste_info->ste->hw_ste, ste_info->data, DR_STE_SIZE_REDUCED);
 
 out:
 	kfree(ste_info);
@@ -456,7 +461,7 @@ dr_rule_rehash_htbl(struct mlx5dr_rule *rule,
 		ste_to_update = cur_htbl->pointing_ste;
 	}
 
-	mlx5dr_send_fill_and_append_ste_send_info(ste_to_update, DR_STE_SIZE_REDUCED,
+	mlx5dr_send_fill_and_append_ste_send_info(ste_to_update, DR_STE_SIZE_CTRL,
 						  0, ste_to_update->hw_ste, ste_info,
 						  update_list, false);
 

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c

@@ -431,6 +431,8 @@ int mlx5dr_send_postsend_ste(struct mlx5dr_domain *dmn, struct mlx5dr_ste *ste,
 {
 	struct postsend_info send_info = {};
 
+	mlx5dr_ste_prepare_for_postsend(dmn->ste_ctx, data, size);
+
 	send_info.write.addr = (uintptr_t)data;
 	send_info.write.length = size;
 	send_info.write.lkey = 0;
@@ -457,6 +459,8 @@ int mlx5dr_send_postsend_htbl(struct mlx5dr_domain *dmn,
 	if (ret)
 		return ret;
 
+	mlx5dr_ste_prepare_for_postsend(dmn->ste_ctx, formatted_ste, DR_STE_SIZE);
+
 	/* Send the data iteration times */
 	for (i = 0; i < iterations; i++) {
 		u32 ste_index = i * (byte_size / DR_STE_SIZE);
@@ -480,6 +484,10 @@ int mlx5dr_send_postsend_htbl(struct mlx5dr_domain *dmn,
 				/* Copy bit_mask */
 				memcpy(data + ste_off + DR_STE_SIZE_REDUCED,
 				       mask, DR_STE_SIZE_MASK);
+				/* Only when we have mask we need to re-arrange the STE */
+				mlx5dr_ste_prepare_for_postsend(dmn->ste_ctx,
+								data + (j * DR_STE_SIZE),
+								DR_STE_SIZE);
 			}
 		}
 
@@ -509,6 +517,7 @@ int mlx5dr_send_postsend_formatted_htbl(struct mlx5dr_domain *dmn,
 	u32 byte_size = htbl->chunk->byte_size;
 	int iterations;
 	int num_stes;
+	u8 *copy_dst;
 	u8 *data;
 	int ret;
 	int i;
@@ -518,20 +527,22 @@ int mlx5dr_send_postsend_formatted_htbl(struct mlx5dr_domain *dmn,
 	if (ret)
 		return ret;
 
-	for (i = 0; i < num_stes; i++) {
-		u8 *copy_dst;
-
-		/* Copy the same ste on the data buffer */
-		copy_dst = data + i * DR_STE_SIZE;
-		memcpy(copy_dst, ste_init_data, DR_STE_SIZE);
-
-		if (update_hw_ste) {
-			/* Copy the reduced ste to hash table ste_arr */
+	if (update_hw_ste) {
+		/* Copy the reduced STE to hash table ste_arr */
+		for (i = 0; i < num_stes; i++) {
 			copy_dst = htbl->hw_ste_arr + i * DR_STE_SIZE_REDUCED;
 			memcpy(copy_dst, ste_init_data, DR_STE_SIZE_REDUCED);
 		}
 	}
 
+	mlx5dr_ste_prepare_for_postsend(dmn->ste_ctx, ste_init_data, DR_STE_SIZE);
+
+	/* Copy the same STE on the data buffer */
+	for (i = 0; i < num_stes; i++) {
+		copy_dst = data + i * DR_STE_SIZE;
+		memcpy(copy_dst, ste_init_data, DR_STE_SIZE);
+	}
+
 	/* Send the data iteration times */
 	for (i = 0; i < iterations; i++) {
 		u8 ste_index = i * (byte_size / DR_STE_SIZE);

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c

@@ -211,13 +211,17 @@ dr_ste_remove_head_ste(struct mlx5dr_ste_ctx *ste_ctx,
  * |_ste_| --> |_next_ste_| -->|__| -->|__| -->/0
  */
 static void
-dr_ste_replace_head_ste(struct mlx5dr_ste *ste, struct mlx5dr_ste *next_ste,
+dr_ste_replace_head_ste(struct mlx5dr_matcher_rx_tx *nic_matcher,
+			struct mlx5dr_ste *ste,
+			struct mlx5dr_ste *next_ste,
 			struct mlx5dr_ste_send_info *ste_info_head,
 			struct list_head *send_ste_list,
 			struct mlx5dr_ste_htbl *stats_tbl)
 
 {
 	struct mlx5dr_ste_htbl *next_miss_htbl;
+	u8 hw_ste[DR_STE_SIZE] = {};
+	int sb_idx;
 
 	next_miss_htbl = next_ste->htbl;
 
@@ -230,13 +234,19 @@ dr_ste_replace_head_ste(struct mlx5dr_ste *ste, struct mlx5dr_ste *next_ste,
 	/* Move data from next into ste */
 	dr_ste_replace(ste, next_ste);
 
+	/* Copy all 64 hw_ste bytes */
+	memcpy(hw_ste, ste->hw_ste, DR_STE_SIZE_REDUCED);
+	sb_idx = ste->ste_chain_location - 1;
+	mlx5dr_ste_set_bit_mask(hw_ste,
+				nic_matcher->ste_builder[sb_idx].bit_mask);
+
 	/* Del the htbl that contains the next_ste.
 	 * The origin htbl stay with the same number of entries.
 	 */
 	mlx5dr_htbl_put(next_miss_htbl);
 
-	mlx5dr_send_fill_and_append_ste_send_info(ste, DR_STE_SIZE_REDUCED,
-						  0, ste->hw_ste,
+	mlx5dr_send_fill_and_append_ste_send_info(ste, DR_STE_SIZE,
+						  0, hw_ste,
 						  ste_info_head,
 						  send_ste_list,
 						  true /* Copy data */);
@@ -264,7 +274,7 @@ static void dr_ste_remove_middle_ste(struct mlx5dr_ste_ctx *ste_ctx,
 	miss_addr = ste_ctx->get_miss_addr(ste->hw_ste);
 	ste_ctx->set_miss_addr(prev_ste->hw_ste, miss_addr);
 
-	mlx5dr_send_fill_and_append_ste_send_info(prev_ste, DR_STE_SIZE_REDUCED, 0,
+	mlx5dr_send_fill_and_append_ste_send_info(prev_ste, DR_STE_SIZE_CTRL, 0,
 						  prev_ste->hw_ste, ste_info,
 						  send_ste_list, true /* Copy data*/);
 
@@ -316,7 +326,8 @@ void mlx5dr_ste_free(struct mlx5dr_ste *ste,
 					       stats_tbl);
 		} else {
 			/* First but not only entry in the list */
-			dr_ste_replace_head_ste(ste, next_ste, &ste_info_head,
+			dr_ste_replace_head_ste(nic_matcher, ste,
+						next_ste, &ste_info_head,
 						&send_ste_list, stats_tbl);
 			put_on_origin_table = false;
 		}
@@ -356,6 +367,13 @@ void mlx5dr_ste_set_hit_addr_by_next_htbl(struct mlx5dr_ste_ctx *ste_ctx,
 	ste_ctx->set_hit_addr(hw_ste, chunk->icm_addr, chunk->num_of_entries);
 }
 
+void mlx5dr_ste_prepare_for_postsend(struct mlx5dr_ste_ctx *ste_ctx,
+				     u8 *hw_ste_p, u32 ste_size)
+{
+	if (ste_ctx->prepare_for_postsend)
+		ste_ctx->prepare_for_postsend(hw_ste_p, ste_size);
+}
+
 /* Init one ste as a pattern for ste data array */
 void mlx5dr_ste_set_formatted_ste(struct mlx5dr_ste_ctx *ste_ctx,
 				  u16 gvmi,
@@ -1127,7 +1145,7 @@ void mlx5dr_ste_build_src_gvmi_qpn(struct mlx5dr_ste_ctx *ste_ctx,
 
 static struct mlx5dr_ste_ctx *mlx5dr_ste_ctx_arr[] = {
 	[MLX5_STEERING_FORMAT_CONNECTX_5] = &ste_ctx_v0,
-	[MLX5_STEERING_FORMAT_CONNECTX_6DX] = NULL,
+	[MLX5_STEERING_FORMAT_CONNECTX_6DX] = &ste_ctx_v1,
 };
 
 struct mlx5dr_ste_ctx *mlx5dr_ste_get_ctx(u8 version)

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.h

@@ -160,8 +160,12 @@ struct mlx5dr_ste_ctx {
 					u8 *hw_action,
 					u32 hw_action_sz,
 					u16 *used_hw_action_num);
+
+	/* Send */
+	void (*prepare_for_postsend)(u8 *hw_ste_p, u32 ste_size);
 };
 
 extern struct mlx5dr_ste_ctx ste_ctx_v0;
+extern struct mlx5dr_ste_ctx ste_ctx_v1;
 
 #endif  /* _DR_STE_ */

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c

@@ -248,8 +248,8 @@ static void dr_ste_v0_set_miss_addr(u8 *hw_ste_p, u64 miss_addr)
 static u64 dr_ste_v0_get_miss_addr(u8 *hw_ste_p)
 {
 	u64 index =
-		(MLX5_GET(ste_rx_steering_mult, hw_ste_p, miss_address_31_6) |
-		 MLX5_GET(ste_rx_steering_mult, hw_ste_p, miss_address_39_32) << 26);
+		((u64)MLX5_GET(ste_rx_steering_mult, hw_ste_p, miss_address_31_6) |
+		 ((u64)MLX5_GET(ste_rx_steering_mult, hw_ste_p, miss_address_39_32)) << 26);
 
 	return index << 6;
 }