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Message-ID: <20240903031948.78006-6-saeed@kernel.org>
Date: Mon, 2 Sep 2024 20:19:36 -0700
From: Saeed Mahameed <saeed@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Eric Dumazet <edumazet@...gle.com>
Cc: Saeed Mahameed <saeedm@...dia.com>,
netdev@...r.kernel.org,
Tariq Toukan <tariqt@...dia.com>,
Gal Pressman <gal@...dia.com>,
Leon Romanovsky <leonro@...dia.com>,
Yevgeny Kliteynik <kliteyn@...dia.com>,
Itamar Gozlan <igozlan@...dia.com>,
Mark Bloch <mbloch@...dia.com>
Subject: [net-next 05/15] net/mlx5: HWS, added rules handling
From: Yevgeny Kliteynik <kliteyn@...dia.com>
Steering rule is a concept that includes match parameters for a flow,
and actions to perform on the flows that match these parameters.
This patch adds rules handling part of HW Steering.
Reviewed-by: Itamar Gozlan <igozlan@...dia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@...dia.com>
Reviewed-by: Mark Bloch <mbloch@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
.../mlx5/core/steering/hws/mlx5hws_rule.c | 780 ++++++++++++++++++
.../mlx5/core/steering/hws/mlx5hws_rule.h | 84 ++
2 files changed, 864 insertions(+)
create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_rule.c
create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_rule.h
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_rule.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_rule.c
new file mode 100644
index 000000000000..50455a626d40
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_rule.c
@@ -0,0 +1,780 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
+
+#include "mlx5hws_internal.h"
+
+static void hws_rule_skip(struct mlx5hws_matcher *matcher,
+ struct mlx5hws_match_template *mt,
+ u32 flow_source,
+ bool *skip_rx, bool *skip_tx)
+{
+ /* By default FDB rules are added to both RX and TX */
+ *skip_rx = false;
+ *skip_tx = false;
+
+ if (flow_source == MLX5_FLOW_CONTEXT_FLOW_SOURCE_LOCAL_VPORT) {
+ *skip_rx = true;
+ } else if (flow_source == MLX5_FLOW_CONTEXT_FLOW_SOURCE_UPLINK) {
+ *skip_tx = true;
+ } else {
+ /* If no flow source was set for current rule,
+ * check for flow source in matcher attributes.
+ */
+ if (matcher->attr.optimize_flow_src) {
+ *skip_tx =
+ matcher->attr.optimize_flow_src == MLX5HWS_MATCHER_FLOW_SRC_WIRE;
+ *skip_rx =
+ matcher->attr.optimize_flow_src == MLX5HWS_MATCHER_FLOW_SRC_VPORT;
+ return;
+ }
+ }
+}
+
+static void
+hws_rule_update_copy_tag(struct mlx5hws_rule *rule,
+ struct mlx5hws_wqe_gta_data_seg_ste *wqe_data,
+ bool is_jumbo)
+{
+ struct mlx5hws_rule_match_tag *tag;
+
+ if (!mlx5hws_matcher_is_resizable(rule->matcher)) {
+ tag = &rule->tag;
+ } else {
+ struct mlx5hws_wqe_gta_data_seg_ste *data_seg =
+ (struct mlx5hws_wqe_gta_data_seg_ste *)(void *)rule->resize_info->data_seg;
+ tag = (struct mlx5hws_rule_match_tag *)(void *)data_seg->action;
+ }
+
+ if (is_jumbo)
+ memcpy(wqe_data->jumbo, tag->jumbo, MLX5HWS_JUMBO_TAG_SZ);
+ else
+ memcpy(wqe_data->tag, tag->match, MLX5HWS_MATCH_TAG_SZ);
+}
+
+static void hws_rule_init_dep_wqe(struct mlx5hws_send_ring_dep_wqe *dep_wqe,
+ struct mlx5hws_rule *rule,
+ struct mlx5hws_match_template *mt,
+ struct mlx5hws_rule_attr *attr)
+{
+ struct mlx5hws_matcher *matcher = rule->matcher;
+ struct mlx5hws_table *tbl = matcher->tbl;
+ bool skip_rx, skip_tx;
+
+ dep_wqe->rule = rule;
+ dep_wqe->user_data = attr->user_data;
+ dep_wqe->direct_index = mlx5hws_matcher_is_insert_by_idx(matcher) ?
+ attr->rule_idx : 0;
+
+ if (tbl->type == MLX5HWS_TABLE_TYPE_FDB) {
+ hws_rule_skip(matcher, mt, attr->flow_source, &skip_rx, &skip_tx);
+
+ if (!skip_rx) {
+ dep_wqe->rtc_0 = matcher->match_ste.rtc_0_id;
+ dep_wqe->retry_rtc_0 = matcher->col_matcher ?
+ matcher->col_matcher->match_ste.rtc_0_id : 0;
+ } else {
+ dep_wqe->rtc_0 = 0;
+ dep_wqe->retry_rtc_0 = 0;
+ }
+
+ if (!skip_tx) {
+ dep_wqe->rtc_1 = matcher->match_ste.rtc_1_id;
+ dep_wqe->retry_rtc_1 = matcher->col_matcher ?
+ matcher->col_matcher->match_ste.rtc_1_id : 0;
+ } else {
+ dep_wqe->rtc_1 = 0;
+ dep_wqe->retry_rtc_1 = 0;
+ }
+ } else {
+ pr_warn("HWS: invalid tbl->type: %d\n", tbl->type);
+ }
+}
+
+static void hws_rule_move_get_rtc(struct mlx5hws_rule *rule,
+ struct mlx5hws_send_ste_attr *ste_attr)
+{
+ struct mlx5hws_matcher *dst_matcher = rule->matcher->resize_dst;
+
+ if (rule->resize_info->rtc_0) {
+ ste_attr->rtc_0 = dst_matcher->match_ste.rtc_0_id;
+ ste_attr->retry_rtc_0 = dst_matcher->col_matcher ?
+ dst_matcher->col_matcher->match_ste.rtc_0_id : 0;
+ }
+ if (rule->resize_info->rtc_1) {
+ ste_attr->rtc_1 = dst_matcher->match_ste.rtc_1_id;
+ ste_attr->retry_rtc_1 = dst_matcher->col_matcher ?
+ dst_matcher->col_matcher->match_ste.rtc_1_id : 0;
+ }
+}
+
+static void hws_rule_gen_comp(struct mlx5hws_send_engine *queue,
+ struct mlx5hws_rule *rule,
+ bool err,
+ void *user_data,
+ enum mlx5hws_rule_status rule_status_on_succ)
+{
+ enum mlx5hws_flow_op_status comp_status;
+
+ if (!err) {
+ comp_status = MLX5HWS_FLOW_OP_SUCCESS;
+ rule->status = rule_status_on_succ;
+ } else {
+ comp_status = MLX5HWS_FLOW_OP_ERROR;
+ rule->status = MLX5HWS_RULE_STATUS_FAILED;
+ }
+
+ mlx5hws_send_engine_inc_rule(queue);
+ mlx5hws_send_engine_gen_comp(queue, user_data, comp_status);
+}
+
+static void
+hws_rule_save_resize_info(struct mlx5hws_rule *rule,
+ struct mlx5hws_send_ste_attr *ste_attr,
+ bool is_update)
+{
+ if (!mlx5hws_matcher_is_resizable(rule->matcher))
+ return;
+
+ if (likely(!is_update)) {
+ rule->resize_info = kzalloc(sizeof(*rule->resize_info), GFP_KERNEL);
+ if (unlikely(!rule->resize_info)) {
+ pr_warn("HWS: resize info isn't allocated for rule\n");
+ return;
+ }
+
+ rule->resize_info->max_stes =
+ rule->matcher->action_ste[MLX5HWS_ACTION_STE_IDX_ANY].max_stes;
+ rule->resize_info->action_ste_pool[0] = rule->matcher->action_ste[0].max_stes ?
+ rule->matcher->action_ste[0].pool :
+ NULL;
+ rule->resize_info->action_ste_pool[1] = rule->matcher->action_ste[1].max_stes ?
+ rule->matcher->action_ste[1].pool :
+ NULL;
+ }
+
+ memcpy(rule->resize_info->ctrl_seg, ste_attr->wqe_ctrl,
+ sizeof(rule->resize_info->ctrl_seg));
+ memcpy(rule->resize_info->data_seg, ste_attr->wqe_data,
+ sizeof(rule->resize_info->data_seg));
+}
+
+void mlx5hws_rule_clear_resize_info(struct mlx5hws_rule *rule)
+{
+ if (mlx5hws_matcher_is_resizable(rule->matcher) &&
+ rule->resize_info) {
+ kfree(rule->resize_info);
+ rule->resize_info = NULL;
+ }
+}
+
+static void
+hws_rule_save_delete_info(struct mlx5hws_rule *rule,
+ struct mlx5hws_send_ste_attr *ste_attr)
+{
+ struct mlx5hws_match_template *mt = rule->matcher->mt;
+ bool is_jumbo = mlx5hws_matcher_mt_is_jumbo(mt);
+
+ if (mlx5hws_matcher_is_resizable(rule->matcher))
+ return;
+
+ if (is_jumbo)
+ memcpy(&rule->tag.jumbo, ste_attr->wqe_data->jumbo, MLX5HWS_JUMBO_TAG_SZ);
+ else
+ memcpy(&rule->tag.match, ste_attr->wqe_data->tag, MLX5HWS_MATCH_TAG_SZ);
+}
+
+static void
+hws_rule_clear_delete_info(struct mlx5hws_rule *rule)
+{
+ /* nothing to do here */
+}
+
+static void
+hws_rule_load_delete_info(struct mlx5hws_rule *rule,
+ struct mlx5hws_send_ste_attr *ste_attr)
+{
+ if (unlikely(!mlx5hws_matcher_is_resizable(rule->matcher))) {
+ ste_attr->wqe_tag = &rule->tag;
+ } else {
+ struct mlx5hws_wqe_gta_data_seg_ste *data_seg =
+ (struct mlx5hws_wqe_gta_data_seg_ste *)(void *)rule->resize_info->data_seg;
+ struct mlx5hws_rule_match_tag *tag =
+ (struct mlx5hws_rule_match_tag *)(void *)data_seg->action;
+ ste_attr->wqe_tag = tag;
+ }
+}
+
+static int hws_rule_alloc_action_ste_idx(struct mlx5hws_rule *rule,
+ u8 action_ste_selector)
+{
+ struct mlx5hws_matcher *matcher = rule->matcher;
+ struct mlx5hws_matcher_action_ste *action_ste;
+ struct mlx5hws_pool_chunk ste = {0};
+ int ret;
+
+ action_ste = &matcher->action_ste[action_ste_selector];
+ ste.order = ilog2(roundup_pow_of_two(action_ste->max_stes));
+ ret = mlx5hws_pool_chunk_alloc(action_ste->pool, &ste);
+ if (unlikely(ret)) {
+ mlx5hws_err(matcher->tbl->ctx,
+ "Failed to allocate STE for rule actions");
+ return ret;
+ }
+ rule->action_ste_idx = ste.offset;
+
+ return 0;
+}
+
+static void hws_rule_free_action_ste_idx(struct mlx5hws_rule *rule,
+ u8 action_ste_selector)
+{
+ struct mlx5hws_matcher *matcher = rule->matcher;
+ struct mlx5hws_pool_chunk ste = {0};
+ struct mlx5hws_pool *pool;
+ u8 max_stes;
+
+ if (mlx5hws_matcher_is_resizable(matcher)) {
+ /* Free the original action pool if rule was resized */
+ max_stes = rule->resize_info->max_stes;
+ pool = rule->resize_info->action_ste_pool[action_ste_selector];
+ } else {
+ max_stes = matcher->action_ste[action_ste_selector].max_stes;
+ pool = matcher->action_ste[action_ste_selector].pool;
+ }
+
+ /* This release is safe only when the rule match part was deleted */
+ ste.order = ilog2(roundup_pow_of_two(max_stes));
+ ste.offset = rule->action_ste_idx;
+
+ mlx5hws_pool_chunk_free(pool, &ste);
+}
+
+static int hws_rule_alloc_action_ste(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ int action_ste_idx;
+ int ret;
+
+ ret = hws_rule_alloc_action_ste_idx(rule, 0);
+ if (unlikely(ret))
+ return ret;
+
+ action_ste_idx = rule->action_ste_idx;
+
+ ret = hws_rule_alloc_action_ste_idx(rule, 1);
+ if (unlikely(ret)) {
+ hws_rule_free_action_ste_idx(rule, 0);
+ return ret;
+ }
+
+ /* Both pools have to return the same index */
+ if (unlikely(rule->action_ste_idx != action_ste_idx)) {
+ pr_warn("HWS: allocation of action STE failed - pool indexes mismatch\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void mlx5hws_rule_free_action_ste(struct mlx5hws_rule *rule)
+{
+ if (rule->action_ste_idx > -1) {
+ hws_rule_free_action_ste_idx(rule, 1);
+ hws_rule_free_action_ste_idx(rule, 0);
+ }
+}
+
+static void hws_rule_create_init(struct mlx5hws_rule *rule,
+ struct mlx5hws_send_ste_attr *ste_attr,
+ struct mlx5hws_actions_apply_data *apply,
+ bool is_update)
+{
+ struct mlx5hws_matcher *matcher = rule->matcher;
+ struct mlx5hws_table *tbl = matcher->tbl;
+ struct mlx5hws_context *ctx = tbl->ctx;
+
+ /* Init rule before reuse */
+ if (!is_update) {
+ /* In update we use these rtc's */
+ rule->rtc_0 = 0;
+ rule->rtc_1 = 0;
+ rule->action_ste_selector = 0;
+ } else {
+ rule->action_ste_selector = !rule->action_ste_selector;
+ }
+
+ rule->pending_wqes = 0;
+ rule->action_ste_idx = -1;
+ rule->status = MLX5HWS_RULE_STATUS_CREATING;
+
+ /* Init default send STE attributes */
+ ste_attr->gta_opcode = MLX5HWS_WQE_GTA_OP_ACTIVATE;
+ ste_attr->send_attr.opmod = MLX5HWS_WQE_GTA_OPMOD_STE;
+ ste_attr->send_attr.opcode = MLX5HWS_WQE_OPCODE_TBL_ACCESS;
+ ste_attr->send_attr.len = MLX5HWS_WQE_SZ_GTA_CTRL + MLX5HWS_WQE_SZ_GTA_DATA;
+
+ /* Init default action apply */
+ apply->tbl_type = tbl->type;
+ apply->common_res = &ctx->common_res[tbl->type];
+ apply->jump_to_action_stc = matcher->action_ste[0].stc.offset;
+ apply->require_dep = 0;
+}
+
+static void hws_rule_move_init(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ /* Save the old RTC IDs to be later used in match STE delete */
+ rule->resize_info->rtc_0 = rule->rtc_0;
+ rule->resize_info->rtc_1 = rule->rtc_1;
+ rule->resize_info->rule_idx = attr->rule_idx;
+
+ rule->rtc_0 = 0;
+ rule->rtc_1 = 0;
+
+ rule->pending_wqes = 0;
+ rule->action_ste_idx = -1;
+ rule->action_ste_selector = 0;
+ rule->status = MLX5HWS_RULE_STATUS_CREATING;
+ rule->resize_info->state = MLX5HWS_RULE_RESIZE_STATE_WRITING;
+}
+
+bool mlx5hws_rule_move_in_progress(struct mlx5hws_rule *rule)
+{
+ return mlx5hws_matcher_is_in_resize(rule->matcher) &&
+ rule->resize_info &&
+ rule->resize_info->state != MLX5HWS_RULE_RESIZE_STATE_IDLE;
+}
+
+static int hws_rule_create_hws(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr,
+ u8 mt_idx,
+ u32 *match_param,
+ u8 at_idx,
+ struct mlx5hws_rule_action rule_actions[])
+{
+ struct mlx5hws_action_template *at = &rule->matcher->at[at_idx];
+ struct mlx5hws_match_template *mt = &rule->matcher->mt[mt_idx];
+ bool is_jumbo = mlx5hws_matcher_mt_is_jumbo(mt);
+ struct mlx5hws_matcher *matcher = rule->matcher;
+ struct mlx5hws_context *ctx = matcher->tbl->ctx;
+ struct mlx5hws_send_ste_attr ste_attr = {0};
+ struct mlx5hws_send_ring_dep_wqe *dep_wqe;
+ struct mlx5hws_actions_wqe_setter *setter;
+ struct mlx5hws_actions_apply_data apply;
+ struct mlx5hws_send_engine *queue;
+ u8 total_stes, action_stes;
+ bool is_update;
+ int i, ret;
+
+ is_update = !match_param;
+
+ setter = &at->setters[at->num_of_action_stes];
+ total_stes = at->num_of_action_stes + (is_jumbo && !at->only_term);
+ action_stes = total_stes - 1;
+
+ queue = &ctx->send_queue[attr->queue_id];
+ if (unlikely(mlx5hws_send_engine_err(queue)))
+ return -EIO;
+
+ hws_rule_create_init(rule, &ste_attr, &apply, is_update);
+
+ /* Allocate dependent match WQE since rule might have dependent writes.
+ * The queued dependent WQE can be later aborted or kept as a dependency.
+ * dep_wqe buffers (ctrl, data) are also reused for all STE writes.
+ */
+ dep_wqe = mlx5hws_send_add_new_dep_wqe(queue);
+ hws_rule_init_dep_wqe(dep_wqe, rule, mt, attr);
+
+ ste_attr.wqe_ctrl = &dep_wqe->wqe_ctrl;
+ ste_attr.wqe_data = &dep_wqe->wqe_data;
+ apply.wqe_ctrl = &dep_wqe->wqe_ctrl;
+ apply.wqe_data = (u32 *)&dep_wqe->wqe_data;
+ apply.rule_action = rule_actions;
+ apply.queue = queue;
+
+ if (action_stes) {
+ /* Allocate action STEs for rules that need more than match STE */
+ if (!is_update) {
+ ret = hws_rule_alloc_action_ste(rule, attr);
+ if (ret) {
+ mlx5hws_err(ctx, "Failed to allocate action memory %d", ret);
+ mlx5hws_send_abort_new_dep_wqe(queue);
+ return ret;
+ }
+ }
+ /* Skip RX/TX based on the dep_wqe init */
+ ste_attr.rtc_0 = dep_wqe->rtc_0 ?
+ matcher->action_ste[rule->action_ste_selector].rtc_0_id : 0;
+ ste_attr.rtc_1 = dep_wqe->rtc_1 ?
+ matcher->action_ste[rule->action_ste_selector].rtc_1_id : 0;
+ /* Action STEs are written to a specific index last to first */
+ ste_attr.direct_index = rule->action_ste_idx + action_stes;
+ apply.next_direct_idx = ste_attr.direct_index;
+ } else {
+ apply.next_direct_idx = 0;
+ }
+
+ for (i = total_stes; i-- > 0;) {
+ mlx5hws_action_apply_setter(&apply, setter--, !i && is_jumbo);
+
+ if (i == 0) {
+ /* Handle last match STE.
+ * For hash split / linear lookup RTCs, packets reaching any STE
+ * will always match and perform the specified actions, which
+ * makes the tag irrelevant.
+ */
+ if (likely(!mlx5hws_matcher_is_insert_by_idx(matcher) && !is_update))
+ mlx5hws_definer_create_tag(match_param, mt->fc, mt->fc_sz,
+ (u8 *)dep_wqe->wqe_data.action);
+ else if (is_update)
+ hws_rule_update_copy_tag(rule, &dep_wqe->wqe_data, is_jumbo);
+
+ /* Rule has dependent WQEs, match dep_wqe is queued */
+ if (action_stes || apply.require_dep)
+ break;
+
+ /* Rule has no dependencies, abort dep_wqe and send WQE now */
+ mlx5hws_send_abort_new_dep_wqe(queue);
+ ste_attr.wqe_tag_is_jumbo = is_jumbo;
+ ste_attr.send_attr.notify_hw = !attr->burst;
+ ste_attr.send_attr.user_data = dep_wqe->user_data;
+ ste_attr.send_attr.rule = dep_wqe->rule;
+ ste_attr.rtc_0 = dep_wqe->rtc_0;
+ ste_attr.rtc_1 = dep_wqe->rtc_1;
+ ste_attr.used_id_rtc_0 = &rule->rtc_0;
+ ste_attr.used_id_rtc_1 = &rule->rtc_1;
+ ste_attr.retry_rtc_0 = dep_wqe->retry_rtc_0;
+ ste_attr.retry_rtc_1 = dep_wqe->retry_rtc_1;
+ ste_attr.direct_index = dep_wqe->direct_index;
+ } else {
+ apply.next_direct_idx = --ste_attr.direct_index;
+ }
+
+ mlx5hws_send_ste(queue, &ste_attr);
+ }
+
+ /* Backup TAG on the rule for deletion and resize info for
+ * moving rules to a new matcher, only after insertion.
+ */
+ if (!is_update)
+ hws_rule_save_delete_info(rule, &ste_attr);
+
+ hws_rule_save_resize_info(rule, &ste_attr, is_update);
+ mlx5hws_send_engine_inc_rule(queue);
+
+ if (!attr->burst)
+ mlx5hws_send_all_dep_wqe(queue);
+
+ return 0;
+}
+
+static void hws_rule_destroy_failed_hws(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ struct mlx5hws_context *ctx = rule->matcher->tbl->ctx;
+ struct mlx5hws_send_engine *queue;
+
+ queue = &ctx->send_queue[attr->queue_id];
+
+ hws_rule_gen_comp(queue, rule, false,
+ attr->user_data, MLX5HWS_RULE_STATUS_DELETED);
+
+ /* Rule failed now we can safely release action STEs */
+ mlx5hws_rule_free_action_ste(rule);
+
+ /* Clear complex tag */
+ hws_rule_clear_delete_info(rule);
+
+ /* Clear info that was saved for resizing */
+ mlx5hws_rule_clear_resize_info(rule);
+
+ /* If a rule that was indicated as burst (need to trigger HW) has failed
+ * insertion we won't ring the HW as nothing is being written to the WQ.
+ * In such case update the last WQE and ring the HW with that work
+ */
+ if (attr->burst)
+ return;
+
+ mlx5hws_send_all_dep_wqe(queue);
+ mlx5hws_send_engine_flush_queue(queue);
+}
+
+static int hws_rule_destroy_hws(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ bool is_jumbo = mlx5hws_matcher_mt_is_jumbo(rule->matcher->mt);
+ struct mlx5hws_context *ctx = rule->matcher->tbl->ctx;
+ struct mlx5hws_matcher *matcher = rule->matcher;
+ struct mlx5hws_wqe_gta_ctrl_seg wqe_ctrl = {0};
+ struct mlx5hws_send_ste_attr ste_attr = {0};
+ struct mlx5hws_send_engine *queue;
+
+ queue = &ctx->send_queue[attr->queue_id];
+
+ if (unlikely(mlx5hws_send_engine_err(queue))) {
+ hws_rule_destroy_failed_hws(rule, attr);
+ return 0;
+ }
+
+ /* Rule is not completed yet */
+ if (rule->status == MLX5HWS_RULE_STATUS_CREATING)
+ return -EBUSY;
+
+ /* Rule failed and doesn't require cleanup */
+ if (rule->status == MLX5HWS_RULE_STATUS_FAILED) {
+ hws_rule_destroy_failed_hws(rule, attr);
+ return 0;
+ }
+
+ if (rule->skip_delete) {
+ /* Rule shouldn't be deleted in HW.
+ * Generate completion as if write succeeded, and we can
+ * safely release action STEs and clear resize info.
+ */
+ hws_rule_gen_comp(queue, rule, false,
+ attr->user_data, MLX5HWS_RULE_STATUS_DELETED);
+
+ mlx5hws_rule_free_action_ste(rule);
+ mlx5hws_rule_clear_resize_info(rule);
+ return 0;
+ }
+
+ mlx5hws_send_engine_inc_rule(queue);
+
+ /* Send dependent WQE */
+ if (!attr->burst)
+ mlx5hws_send_all_dep_wqe(queue);
+
+ rule->status = MLX5HWS_RULE_STATUS_DELETING;
+
+ ste_attr.send_attr.opmod = MLX5HWS_WQE_GTA_OPMOD_STE;
+ ste_attr.send_attr.opcode = MLX5HWS_WQE_OPCODE_TBL_ACCESS;
+ ste_attr.send_attr.len = MLX5HWS_WQE_SZ_GTA_CTRL + MLX5HWS_WQE_SZ_GTA_DATA;
+
+ ste_attr.send_attr.rule = rule;
+ ste_attr.send_attr.notify_hw = !attr->burst;
+ ste_attr.send_attr.user_data = attr->user_data;
+
+ ste_attr.rtc_0 = rule->rtc_0;
+ ste_attr.rtc_1 = rule->rtc_1;
+ ste_attr.used_id_rtc_0 = &rule->rtc_0;
+ ste_attr.used_id_rtc_1 = &rule->rtc_1;
+ ste_attr.wqe_ctrl = &wqe_ctrl;
+ ste_attr.wqe_tag_is_jumbo = is_jumbo;
+ ste_attr.gta_opcode = MLX5HWS_WQE_GTA_OP_DEACTIVATE;
+ if (unlikely(mlx5hws_matcher_is_insert_by_idx(matcher)))
+ ste_attr.direct_index = attr->rule_idx;
+
+ hws_rule_load_delete_info(rule, &ste_attr);
+ mlx5hws_send_ste(queue, &ste_attr);
+ hws_rule_clear_delete_info(rule);
+
+ return 0;
+}
+
+static int hws_rule_enqueue_precheck(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ struct mlx5hws_context *ctx = rule->matcher->tbl->ctx;
+
+ if (unlikely(!attr->user_data))
+ return -EINVAL;
+
+ /* Check if there is room in queue */
+ if (unlikely(mlx5hws_send_engine_full(&ctx->send_queue[attr->queue_id])))
+ return -EBUSY;
+
+ return 0;
+}
+
+static int hws_rule_enqueue_precheck_move(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ if (unlikely(rule->status != MLX5HWS_RULE_STATUS_CREATED))
+ return -EINVAL;
+
+ return hws_rule_enqueue_precheck(rule, attr);
+}
+
+static int hws_rule_enqueue_precheck_create(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ if (unlikely(mlx5hws_matcher_is_in_resize(rule->matcher)))
+ /* Matcher in resize - new rules are not allowed */
+ return -EAGAIN;
+
+ return hws_rule_enqueue_precheck(rule, attr);
+}
+
+static int hws_rule_enqueue_precheck_update(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ struct mlx5hws_matcher *matcher = rule->matcher;
+
+ if (unlikely(!mlx5hws_matcher_is_resizable(rule->matcher) &&
+ !matcher->attr.optimize_using_rule_idx &&
+ !mlx5hws_matcher_is_insert_by_idx(matcher))) {
+ return -EOPNOTSUPP;
+ }
+
+ if (unlikely(rule->status != MLX5HWS_RULE_STATUS_CREATED))
+ return -EBUSY;
+
+ return hws_rule_enqueue_precheck_create(rule, attr);
+}
+
+int mlx5hws_rule_move_hws_remove(struct mlx5hws_rule *rule,
+ void *queue_ptr,
+ void *user_data)
+{
+ bool is_jumbo = mlx5hws_matcher_mt_is_jumbo(rule->matcher->mt);
+ struct mlx5hws_wqe_gta_ctrl_seg empty_wqe_ctrl = {0};
+ struct mlx5hws_matcher *matcher = rule->matcher;
+ struct mlx5hws_send_engine *queue = queue_ptr;
+ struct mlx5hws_send_ste_attr ste_attr = {0};
+
+ mlx5hws_send_all_dep_wqe(queue);
+
+ rule->resize_info->state = MLX5HWS_RULE_RESIZE_STATE_DELETING;
+
+ ste_attr.send_attr.fence = 0;
+ ste_attr.send_attr.opmod = MLX5HWS_WQE_GTA_OPMOD_STE;
+ ste_attr.send_attr.opcode = MLX5HWS_WQE_OPCODE_TBL_ACCESS;
+ ste_attr.send_attr.len = MLX5HWS_WQE_SZ_GTA_CTRL + MLX5HWS_WQE_SZ_GTA_DATA;
+ ste_attr.send_attr.rule = rule;
+ ste_attr.send_attr.notify_hw = 1;
+ ste_attr.send_attr.user_data = user_data;
+ ste_attr.rtc_0 = rule->resize_info->rtc_0;
+ ste_attr.rtc_1 = rule->resize_info->rtc_1;
+ ste_attr.used_id_rtc_0 = &rule->resize_info->rtc_0;
+ ste_attr.used_id_rtc_1 = &rule->resize_info->rtc_1;
+ ste_attr.wqe_ctrl = &empty_wqe_ctrl;
+ ste_attr.wqe_tag_is_jumbo = is_jumbo;
+ ste_attr.gta_opcode = MLX5HWS_WQE_GTA_OP_DEACTIVATE;
+
+ if (unlikely(mlx5hws_matcher_is_insert_by_idx(matcher)))
+ ste_attr.direct_index = rule->resize_info->rule_idx;
+
+ hws_rule_load_delete_info(rule, &ste_attr);
+ mlx5hws_send_ste(queue, &ste_attr);
+
+ return 0;
+}
+
+int mlx5hws_rule_move_hws_add(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ bool is_jumbo = mlx5hws_matcher_mt_is_jumbo(rule->matcher->mt);
+ struct mlx5hws_context *ctx = rule->matcher->tbl->ctx;
+ struct mlx5hws_matcher *matcher = rule->matcher;
+ struct mlx5hws_send_ste_attr ste_attr = {0};
+ struct mlx5hws_send_engine *queue;
+ int ret;
+
+ ret = hws_rule_enqueue_precheck_move(rule, attr);
+ if (unlikely(ret))
+ return ret;
+
+ queue = &ctx->send_queue[attr->queue_id];
+
+ ret = mlx5hws_send_engine_err(queue);
+ if (ret)
+ return ret;
+
+ hws_rule_move_init(rule, attr);
+ hws_rule_move_get_rtc(rule, &ste_attr);
+
+ ste_attr.send_attr.opmod = MLX5HWS_WQE_GTA_OPMOD_STE;
+ ste_attr.send_attr.opcode = MLX5HWS_WQE_OPCODE_TBL_ACCESS;
+ ste_attr.send_attr.len = MLX5HWS_WQE_SZ_GTA_CTRL + MLX5HWS_WQE_SZ_GTA_DATA;
+ ste_attr.gta_opcode = MLX5HWS_WQE_GTA_OP_ACTIVATE;
+ ste_attr.wqe_tag_is_jumbo = is_jumbo;
+
+ ste_attr.send_attr.rule = rule;
+ ste_attr.send_attr.fence = 0;
+ ste_attr.send_attr.notify_hw = !attr->burst;
+ ste_attr.send_attr.user_data = attr->user_data;
+
+ ste_attr.used_id_rtc_0 = &rule->rtc_0;
+ ste_attr.used_id_rtc_1 = &rule->rtc_1;
+ ste_attr.wqe_ctrl = (struct mlx5hws_wqe_gta_ctrl_seg *)rule->resize_info->ctrl_seg;
+ ste_attr.wqe_data = (struct mlx5hws_wqe_gta_data_seg_ste *)rule->resize_info->data_seg;
+ ste_attr.direct_index = mlx5hws_matcher_is_insert_by_idx(matcher) ?
+ attr->rule_idx : 0;
+
+ mlx5hws_send_ste(queue, &ste_attr);
+ mlx5hws_send_engine_inc_rule(queue);
+
+ if (!attr->burst)
+ mlx5hws_send_all_dep_wqe(queue);
+
+ return 0;
+}
+
+int mlx5hws_rule_create(struct mlx5hws_matcher *matcher,
+ u8 mt_idx,
+ u32 *match_param,
+ u8 at_idx,
+ struct mlx5hws_rule_action rule_actions[],
+ struct mlx5hws_rule_attr *attr,
+ struct mlx5hws_rule *rule_handle)
+{
+ int ret;
+
+ rule_handle->matcher = matcher;
+
+ ret = hws_rule_enqueue_precheck_create(rule_handle, attr);
+ if (unlikely(ret))
+ return ret;
+
+ if (unlikely(!(matcher->num_of_mt >= mt_idx) ||
+ !(matcher->num_of_at >= at_idx) ||
+ !match_param)) {
+ pr_warn("HWS: Invalid rule creation parameters (MTs, ATs or match params)\n");
+ return -EINVAL;
+ }
+
+ ret = hws_rule_create_hws(rule_handle,
+ attr,
+ mt_idx,
+ match_param,
+ at_idx,
+ rule_actions);
+
+ return ret;
+}
+
+int mlx5hws_rule_destroy(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr)
+{
+ int ret;
+
+ ret = hws_rule_enqueue_precheck(rule, attr);
+ if (unlikely(ret))
+ return -ret;
+
+ ret = hws_rule_destroy_hws(rule, attr);
+
+ return -ret;
+}
+
+int mlx5hws_rule_action_update(struct mlx5hws_rule *rule,
+ u8 at_idx,
+ struct mlx5hws_rule_action rule_actions[],
+ struct mlx5hws_rule_attr *attr)
+{
+ int ret;
+
+ ret = hws_rule_enqueue_precheck_update(rule, attr);
+ if (unlikely(ret))
+ return -ret;
+
+ ret = hws_rule_create_hws(rule,
+ attr,
+ 0,
+ NULL,
+ at_idx,
+ rule_actions);
+
+ return -ret;
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_rule.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_rule.h
new file mode 100644
index 000000000000..495cdd17e9f3
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_rule.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
+
+#ifndef MLX5HWS_RULE_H_
+#define MLX5HWS_RULE_H_
+
+enum {
+ MLX5HWS_STE_CTRL_SZ = 20,
+ MLX5HWS_ACTIONS_SZ = 12,
+ MLX5HWS_MATCH_TAG_SZ = 32,
+ MLX5HWS_JUMBO_TAG_SZ = 44,
+};
+
+enum mlx5hws_rule_status {
+ MLX5HWS_RULE_STATUS_UNKNOWN,
+ MLX5HWS_RULE_STATUS_CREATING,
+ MLX5HWS_RULE_STATUS_CREATED,
+ MLX5HWS_RULE_STATUS_DELETING,
+ MLX5HWS_RULE_STATUS_DELETED,
+ MLX5HWS_RULE_STATUS_FAILING,
+ MLX5HWS_RULE_STATUS_FAILED,
+};
+
+enum mlx5hws_rule_move_state {
+ MLX5HWS_RULE_RESIZE_STATE_IDLE,
+ MLX5HWS_RULE_RESIZE_STATE_WRITING,
+ MLX5HWS_RULE_RESIZE_STATE_DELETING,
+};
+
+enum mlx5hws_rule_jumbo_match_tag_offset {
+ MLX5HWS_RULE_JUMBO_MATCH_TAG_OFFSET_DW0 = 8,
+};
+
+struct mlx5hws_rule_match_tag {
+ union {
+ u8 jumbo[MLX5HWS_JUMBO_TAG_SZ];
+ struct {
+ u8 reserved[MLX5HWS_ACTIONS_SZ];
+ u8 match[MLX5HWS_MATCH_TAG_SZ];
+ };
+ };
+};
+
+struct mlx5hws_rule_resize_info {
+ struct mlx5hws_pool *action_ste_pool[2];
+ u32 rtc_0;
+ u32 rtc_1;
+ u32 rule_idx;
+ u8 state;
+ u8 max_stes;
+ u8 ctrl_seg[MLX5HWS_WQE_SZ_GTA_CTRL]; /* Ctrl segment of STE: 48 bytes */
+ u8 data_seg[MLX5HWS_WQE_SZ_GTA_DATA]; /* Data segment of STE: 64 bytes */
+};
+
+struct mlx5hws_rule {
+ struct mlx5hws_matcher *matcher;
+ union {
+ struct mlx5hws_rule_match_tag tag;
+ struct mlx5hws_rule_resize_info *resize_info;
+ };
+ u32 rtc_0; /* The RTC into which the STE was inserted */
+ u32 rtc_1; /* The RTC into which the STE was inserted */
+ int action_ste_idx; /* STE array index */
+ u8 status; /* enum mlx5hws_rule_status */
+ u8 action_ste_selector; /* For rule update - which action STE is in use */
+ u8 pending_wqes;
+ bool skip_delete; /* For complex rules - another rule with same tag
+ * still exists, so don't actually delete this rule.
+ */
+};
+
+void mlx5hws_rule_free_action_ste(struct mlx5hws_rule *rule);
+
+int mlx5hws_rule_move_hws_remove(struct mlx5hws_rule *rule,
+ void *queue, void *user_data);
+
+int mlx5hws_rule_move_hws_add(struct mlx5hws_rule *rule,
+ struct mlx5hws_rule_attr *attr);
+
+bool mlx5hws_rule_move_in_progress(struct mlx5hws_rule *rule);
+
+void mlx5hws_rule_clear_resize_info(struct mlx5hws_rule *rule);
+
+#endif /* MLX5HWS_RULE_H_ */
--
2.46.0
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