From patchwork Tue Sep 3 03:19:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saeed Mahameed X-Patchwork-Id: 13787899 X-Patchwork-Delegate: kuba@kernel.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A1F7A1CF295 for ; Tue, 3 Sep 2024 03:20:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725333606; cv=none; b=EjhzmrnUsowO2qCqId88CYLimXxZs7VmZzqz9rBArGCdVZiREiyaVlEWHRfw3lYkwoAdtHhmKIXfOEEfpPyOoE7pbx3o8t0r29Nm8FMgt5oJieHgRZtOFXQfJd59iBUYy9ujUqcOt6G80zDGYystTyVYLGrPzk+QuFZ8XzuA77s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725333606; c=relaxed/simple; bh=1O4beVPs0dLvGIEJLpyjDjF4E/IBgzQZNU4DxJIonMQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dP0zdp2mqyrbUKwEImEcoM3U3QoISpDoHSwOOMyFptRJ/c5WFUqwd6NaLh5V8tibN/UzJqWwtXDvNCGZqCqunmpTc5C4oxt8mVm2jx0Pkg3X+kSSv1J11VGvAZQN44hWEtV1jzhlAgIFHUIhDBStvKSZJM6AaILWoQG66+Kk2FY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qXqrDL+W; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qXqrDL+W" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F1E1CC4CEC7; Tue, 3 Sep 2024 03:20:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725333606; bh=1O4beVPs0dLvGIEJLpyjDjF4E/IBgzQZNU4DxJIonMQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qXqrDL+Wu969UGIKGQyN7qbm6MmlLPvHjPV/o6uXtECevgHl0U6qDpNshc3ZTFCpn ySHivOcxcVYIRPqjny16LUH48mt5weo+Ef5x767yhcFofbzqPgnEPrAOXLNZ22EXiz IqkhQzX+x95TCxQkujmQg7KIduGpXUgXMMU9A5QqFslss98Zgy/tiHxft3aHHa9wtk Ql4RARPUq/RfYRXuzv6+OtosTNcbhKrgdQobT1HDC+OB+9Kk2WC5vISS/9zwv2Xnc/ /YmBGGXQ6CCychxZ/lz5YmuNp0sbfB7xrqV3m0e1clpPzrjs+aqa7ravyqSmHgCXqB stjQ3QEmBp44g== From: Saeed Mahameed To: "David S. Miller" , Jakub Kicinski , Paolo Abeni , Eric Dumazet Cc: Saeed Mahameed , netdev@vger.kernel.org, Tariq Toukan , Gal Pressman , Leon Romanovsky , Yevgeny Kliteynik , Itamar Gozlan Subject: [net-next 14/15] net/mlx5: HWS, added send engine and context handling Date: Mon, 2 Sep 2024 20:19:45 -0700 Message-ID: <20240903031948.78006-15-saeed@kernel.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240903031948.78006-1-saeed@kernel.org> References: <20240903031948.78006-1-saeed@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org From: Yevgeny Kliteynik Added implementation of send engine and handling of HWS context. Reviewed-by: Itamar Gozlan Signed-off-by: Yevgeny Kliteynik Signed-off-by: Saeed Mahameed --- .../mlx5/core/steering/hws/mlx5hws_context.c | 260 ++++ .../mlx5/core/steering/hws/mlx5hws_context.h | 64 + .../mlx5/core/steering/hws/mlx5hws_send.c | 1202 +++++++++++++++++ .../mlx5/core/steering/hws/mlx5hws_send.h | 270 ++++ 4 files changed, 1796 insertions(+) create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_context.c create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_context.h create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.c create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.h diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_context.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_context.c new file mode 100644 index 000000000000..00e4fdf4a558 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_context.c @@ -0,0 +1,260 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* Copyright (c) 2024 NVIDIA CORPORATION. All rights reserved. */ + +#include "mlx5hws_internal.h" + +bool mlx5hws_context_cap_dynamic_reparse(struct mlx5hws_context *ctx) +{ + return IS_BIT_SET(ctx->caps->rtc_reparse_mode, MLX5_IFC_RTC_REPARSE_BY_STC); +} + +u8 mlx5hws_context_get_reparse_mode(struct mlx5hws_context *ctx) +{ + /* Prefer to use dynamic reparse, reparse only specific actions */ + if (mlx5hws_context_cap_dynamic_reparse(ctx)) + return MLX5_IFC_RTC_REPARSE_NEVER; + + /* Otherwise use less efficient static */ + return MLX5_IFC_RTC_REPARSE_ALWAYS; +} + +static int hws_context_pools_init(struct mlx5hws_context *ctx) +{ + struct mlx5hws_pool_attr pool_attr = {0}; + u8 max_log_sz; + int ret; + int i; + + ret = mlx5hws_pat_init_pattern_cache(&ctx->pattern_cache); + if (ret) + return ret; + + ret = mlx5hws_definer_init_cache(&ctx->definer_cache); + if (ret) + goto uninit_pat_cache; + + /* Create an STC pool per FT type */ + pool_attr.pool_type = MLX5HWS_POOL_TYPE_STC; + pool_attr.flags = MLX5HWS_POOL_FLAGS_FOR_STC_POOL; + max_log_sz = min(MLX5HWS_POOL_STC_LOG_SZ, ctx->caps->stc_alloc_log_max); + pool_attr.alloc_log_sz = max(max_log_sz, ctx->caps->stc_alloc_log_gran); + + for (i = 0; i < MLX5HWS_TABLE_TYPE_MAX; i++) { + pool_attr.table_type = i; + ctx->stc_pool[i] = mlx5hws_pool_create(ctx, &pool_attr); + if (!ctx->stc_pool[i]) { + mlx5hws_err(ctx, "Failed to allocate STC pool [%d]", i); + ret = -ENOMEM; + goto free_stc_pools; + } + } + + return 0; + +free_stc_pools: + for (i = 0; i < MLX5HWS_TABLE_TYPE_MAX; i++) + if (ctx->stc_pool[i]) + mlx5hws_pool_destroy(ctx->stc_pool[i]); + + mlx5hws_definer_uninit_cache(ctx->definer_cache); +uninit_pat_cache: + mlx5hws_pat_uninit_pattern_cache(ctx->pattern_cache); + return ret; +} + +static void hws_context_pools_uninit(struct mlx5hws_context *ctx) +{ + int i; + + for (i = 0; i < MLX5HWS_TABLE_TYPE_MAX; i++) { + if (ctx->stc_pool[i]) + mlx5hws_pool_destroy(ctx->stc_pool[i]); + } + + mlx5hws_definer_uninit_cache(ctx->definer_cache); + mlx5hws_pat_uninit_pattern_cache(ctx->pattern_cache); +} + +static int hws_context_init_pd(struct mlx5hws_context *ctx) +{ + int ret = 0; + + ret = mlx5_core_alloc_pd(ctx->mdev, &ctx->pd_num); + if (ret) { + mlx5hws_err(ctx, "Failed to allocate PD\n"); + return ret; + } + + ctx->flags |= MLX5HWS_CONTEXT_FLAG_PRIVATE_PD; + + return 0; +} + +static int hws_context_uninit_pd(struct mlx5hws_context *ctx) +{ + if (ctx->flags & MLX5HWS_CONTEXT_FLAG_PRIVATE_PD) + mlx5_core_dealloc_pd(ctx->mdev, ctx->pd_num); + + return 0; +} + +static void hws_context_check_hws_supp(struct mlx5hws_context *ctx) +{ + struct mlx5hws_cmd_query_caps *caps = ctx->caps; + + /* HWS not supported on device / FW */ + if (!caps->wqe_based_update) { + mlx5hws_err(ctx, "Required HWS WQE based insertion cap not supported\n"); + return; + } + + if (!caps->eswitch_manager) { + mlx5hws_err(ctx, "HWS is not supported for non eswitch manager port\n"); + return; + } + + /* Current solution requires all rules to set reparse bit */ + if ((!caps->nic_ft.reparse || + (!caps->fdb_ft.reparse && caps->eswitch_manager)) || + !IS_BIT_SET(caps->rtc_reparse_mode, MLX5_IFC_RTC_REPARSE_ALWAYS)) { + mlx5hws_err(ctx, "Required HWS reparse cap not supported\n"); + return; + } + + /* FW/HW must support 8DW STE */ + if (!IS_BIT_SET(caps->ste_format, MLX5_IFC_RTC_STE_FORMAT_8DW)) { + mlx5hws_err(ctx, "Required HWS STE format not supported\n"); + return; + } + + /* Adding rules by hash and by offset are requirements */ + if (!IS_BIT_SET(caps->rtc_index_mode, MLX5_IFC_RTC_STE_UPDATE_MODE_BY_HASH) || + !IS_BIT_SET(caps->rtc_index_mode, MLX5_IFC_RTC_STE_UPDATE_MODE_BY_OFFSET)) { + mlx5hws_err(ctx, "Required HWS RTC update mode not supported\n"); + return; + } + + /* Support for SELECT definer ID is required */ + if (!IS_BIT_SET(caps->definer_format_sup, MLX5_IFC_DEFINER_FORMAT_ID_SELECT)) { + mlx5hws_err(ctx, "Required HWS Dynamic definer not supported\n"); + return; + } + + ctx->flags |= MLX5HWS_CONTEXT_FLAG_HWS_SUPPORT; +} + +static int hws_context_init_hws(struct mlx5hws_context *ctx, + struct mlx5hws_context_attr *attr) +{ + int ret; + + hws_context_check_hws_supp(ctx); + + if (!(ctx->flags & MLX5HWS_CONTEXT_FLAG_HWS_SUPPORT)) + return 0; + + ret = hws_context_init_pd(ctx); + if (ret) + return ret; + + ret = hws_context_pools_init(ctx); + if (ret) + goto uninit_pd; + + if (attr->bwc) + ctx->flags |= MLX5HWS_CONTEXT_FLAG_BWC_SUPPORT; + + ret = mlx5hws_send_queues_open(ctx, attr->queues, attr->queue_size); + if (ret) + goto pools_uninit; + + INIT_LIST_HEAD(&ctx->tbl_list); + + return 0; + +pools_uninit: + hws_context_pools_uninit(ctx); +uninit_pd: + hws_context_uninit_pd(ctx); + return ret; +} + +static void hws_context_uninit_hws(struct mlx5hws_context *ctx) +{ + if (!(ctx->flags & MLX5HWS_CONTEXT_FLAG_HWS_SUPPORT)) + return; + + mlx5hws_send_queues_close(ctx); + hws_context_pools_uninit(ctx); + hws_context_uninit_pd(ctx); +} + +struct mlx5hws_context *mlx5hws_context_open(struct mlx5_core_dev *mdev, + struct mlx5hws_context_attr *attr) +{ + struct mlx5hws_context *ctx; + int ret; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + ctx->mdev = mdev; + + mutex_init(&ctx->ctrl_lock); + xa_init(&ctx->peer_ctx_xa); + + ctx->caps = kzalloc(sizeof(*ctx->caps), GFP_KERNEL); + if (!ctx->caps) + goto free_ctx; + + ret = mlx5hws_cmd_query_caps(mdev, ctx->caps); + if (ret) + goto free_caps; + + ret = mlx5hws_vport_init_vports(ctx); + if (ret) + goto free_caps; + + ret = hws_context_init_hws(ctx, attr); + if (ret) + goto uninit_vports; + + mlx5hws_debug_init_dump(ctx); + + return ctx; + +uninit_vports: + mlx5hws_vport_uninit_vports(ctx); +free_caps: + kfree(ctx->caps); +free_ctx: + xa_destroy(&ctx->peer_ctx_xa); + mutex_destroy(&ctx->ctrl_lock); + kfree(ctx); + return NULL; +} + +int mlx5hws_context_close(struct mlx5hws_context *ctx) +{ + mlx5hws_debug_uninit_dump(ctx); + hws_context_uninit_hws(ctx); + mlx5hws_vport_uninit_vports(ctx); + kfree(ctx->caps); + xa_destroy(&ctx->peer_ctx_xa); + mutex_destroy(&ctx->ctrl_lock); + kfree(ctx); + return 0; +} + +void mlx5hws_context_set_peer(struct mlx5hws_context *ctx, + struct mlx5hws_context *peer_ctx, + u16 peer_vhca_id) +{ + mutex_lock(&ctx->ctrl_lock); + + if (xa_err(xa_store(&ctx->peer_ctx_xa, peer_vhca_id, peer_ctx, GFP_KERNEL))) + pr_warn("HWS: failed storing peer vhca ID in peer xarray\n"); + + mutex_unlock(&ctx->ctrl_lock); +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_context.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_context.h new file mode 100644 index 000000000000..e5a7ce604334 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_context.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ +/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */ + +#ifndef MLX5HWS_CONTEXT_H_ +#define MLX5HWS_CONTEXT_H_ + +enum mlx5hws_context_flags { + MLX5HWS_CONTEXT_FLAG_HWS_SUPPORT = 1 << 0, + MLX5HWS_CONTEXT_FLAG_PRIVATE_PD = 1 << 1, + MLX5HWS_CONTEXT_FLAG_BWC_SUPPORT = 1 << 2, +}; + +enum mlx5hws_context_shared_stc_type { + MLX5HWS_CONTEXT_SHARED_STC_DECAP_L3 = 0, + MLX5HWS_CONTEXT_SHARED_STC_DOUBLE_POP = 1, + MLX5HWS_CONTEXT_SHARED_STC_MAX = 2, +}; + +struct mlx5hws_context_common_res { + struct mlx5hws_action_default_stc *default_stc; + struct mlx5hws_action_shared_stc *shared_stc[MLX5HWS_CONTEXT_SHARED_STC_MAX]; + struct mlx5hws_cmd_forward_tbl *default_miss; +}; + +struct mlx5hws_context_debug_info { + struct dentry *steering_debugfs; + struct dentry *fdb_debugfs; +}; + +struct mlx5hws_context_vports { + u16 esw_manager_gvmi; + u16 uplink_gvmi; + struct xarray vport_gvmi_xa; +}; + +struct mlx5hws_context { + struct mlx5_core_dev *mdev; + struct mlx5hws_cmd_query_caps *caps; + u32 pd_num; + struct mlx5hws_pool *stc_pool[MLX5HWS_TABLE_TYPE_MAX]; + struct mlx5hws_context_common_res common_res[MLX5HWS_TABLE_TYPE_MAX]; + struct mlx5hws_pattern_cache *pattern_cache; + struct mlx5hws_definer_cache *definer_cache; + struct mutex ctrl_lock; /* control lock to protect the whole context */ + enum mlx5hws_context_flags flags; + struct mlx5hws_send_engine *send_queue; + size_t queues; + struct mutex *bwc_send_queue_locks; /* protect BWC queues */ + struct list_head tbl_list; + struct mlx5hws_context_debug_info debug_info; + struct xarray peer_ctx_xa; + struct mlx5hws_context_vports vports; +}; + +static inline bool mlx5hws_context_bwc_supported(struct mlx5hws_context *ctx) +{ + return ctx->flags & MLX5HWS_CONTEXT_FLAG_BWC_SUPPORT; +} + +bool mlx5hws_context_cap_dynamic_reparse(struct mlx5hws_context *ctx); + +u8 mlx5hws_context_get_reparse_mode(struct mlx5hws_context *ctx); + +#endif /* MLX5HWS_CONTEXT_H_ */ diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.c new file mode 100644 index 000000000000..d95d5e1fcbee --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.c @@ -0,0 +1,1202 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */ + +#include "mlx5hws_internal.h" +#include "lib/clock.h" + +enum { CQ_OK = 0, CQ_EMPTY = -1, CQ_POLL_ERR = -2 }; + +struct mlx5hws_send_ring_dep_wqe * +mlx5hws_send_add_new_dep_wqe(struct mlx5hws_send_engine *queue) +{ + struct mlx5hws_send_ring_sq *send_sq = &queue->send_ring.send_sq; + unsigned int idx = send_sq->head_dep_idx++ & (queue->num_entries - 1); + + memset(&send_sq->dep_wqe[idx].wqe_data.tag, 0, MLX5HWS_MATCH_TAG_SZ); + + return &send_sq->dep_wqe[idx]; +} + +void mlx5hws_send_abort_new_dep_wqe(struct mlx5hws_send_engine *queue) +{ + queue->send_ring.send_sq.head_dep_idx--; +} + +void mlx5hws_send_all_dep_wqe(struct mlx5hws_send_engine *queue) +{ + struct mlx5hws_send_ring_sq *send_sq = &queue->send_ring.send_sq; + struct mlx5hws_send_ste_attr ste_attr = {0}; + struct mlx5hws_send_ring_dep_wqe *dep_wqe; + + 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; + + /* Fence first from previous depend WQEs */ + ste_attr.send_attr.fence = 1; + + while (send_sq->head_dep_idx != send_sq->tail_dep_idx) { + dep_wqe = &send_sq->dep_wqe[send_sq->tail_dep_idx++ & (queue->num_entries - 1)]; + + /* Notify HW on the last WQE */ + ste_attr.send_attr.notify_hw = (send_sq->tail_dep_idx == send_sq->head_dep_idx); + 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.retry_rtc_0 = dep_wqe->retry_rtc_0; + ste_attr.retry_rtc_1 = dep_wqe->retry_rtc_1; + ste_attr.used_id_rtc_0 = &dep_wqe->rule->rtc_0; + ste_attr.used_id_rtc_1 = &dep_wqe->rule->rtc_1; + ste_attr.wqe_ctrl = &dep_wqe->wqe_ctrl; + ste_attr.wqe_data = &dep_wqe->wqe_data; + ste_attr.direct_index = dep_wqe->direct_index; + + mlx5hws_send_ste(queue, &ste_attr); + + /* Fencing is done only on the first WQE */ + ste_attr.send_attr.fence = 0; + } +} + +struct mlx5hws_send_engine_post_ctrl +mlx5hws_send_engine_post_start(struct mlx5hws_send_engine *queue) +{ + struct mlx5hws_send_engine_post_ctrl ctrl; + + ctrl.queue = queue; + /* Currently only one send ring is supported */ + ctrl.send_ring = &queue->send_ring; + ctrl.num_wqebbs = 0; + + return ctrl; +} + +void mlx5hws_send_engine_post_req_wqe(struct mlx5hws_send_engine_post_ctrl *ctrl, + char **buf, size_t *len) +{ + struct mlx5hws_send_ring_sq *send_sq = &ctrl->send_ring->send_sq; + unsigned int idx; + + idx = (send_sq->cur_post + ctrl->num_wqebbs) & send_sq->buf_mask; + + /* Note that *buf is a single MLX5_SEND_WQE_BB. It cannot be used + * as buffer of more than one WQE_BB, since the two MLX5_SEND_WQE_BB + * can be on 2 different kernel memory pages. + */ + *buf = mlx5_wq_cyc_get_wqe(&send_sq->wq, idx); + *len = MLX5_SEND_WQE_BB; + + if (!ctrl->num_wqebbs) { + *buf += sizeof(struct mlx5hws_wqe_ctrl_seg); + *len -= sizeof(struct mlx5hws_wqe_ctrl_seg); + } + + ctrl->num_wqebbs++; +} + +static void hws_send_engine_post_ring(struct mlx5hws_send_ring_sq *sq, + struct mlx5hws_wqe_ctrl_seg *doorbell_cseg) +{ + /* ensure wqe is visible to device before updating doorbell record */ + dma_wmb(); + + *sq->wq.db = cpu_to_be32(sq->cur_post); + + /* ensure doorbell record is visible to device before ringing the + * doorbell + */ + wmb(); + + mlx5_write64((__be32 *)doorbell_cseg, sq->uar_map); + + /* Ensure doorbell is written on uar_page before poll_cq */ + WRITE_ONCE(doorbell_cseg, NULL); +} + +static void +hws_send_wqe_set_tag(struct mlx5hws_wqe_gta_data_seg_ste *wqe_data, + struct mlx5hws_rule_match_tag *tag, + bool is_jumbo) +{ + if (is_jumbo) { + /* Clear previous possibly dirty control */ + memset(wqe_data, 0, MLX5HWS_STE_CTRL_SZ); + memcpy(wqe_data->jumbo, tag->jumbo, MLX5HWS_JUMBO_TAG_SZ); + } else { + /* Clear previous possibly dirty control and actions */ + memset(wqe_data, 0, MLX5HWS_STE_CTRL_SZ + MLX5HWS_ACTIONS_SZ); + memcpy(wqe_data->tag, tag->match, MLX5HWS_MATCH_TAG_SZ); + } +} + +void mlx5hws_send_engine_post_end(struct mlx5hws_send_engine_post_ctrl *ctrl, + struct mlx5hws_send_engine_post_attr *attr) +{ + struct mlx5hws_wqe_ctrl_seg *wqe_ctrl; + struct mlx5hws_send_ring_sq *sq; + unsigned int idx; + u32 flags = 0; + + sq = &ctrl->send_ring->send_sq; + idx = sq->cur_post & sq->buf_mask; + sq->last_idx = idx; + + wqe_ctrl = mlx5_wq_cyc_get_wqe(&sq->wq, idx); + + wqe_ctrl->opmod_idx_opcode = + cpu_to_be32((attr->opmod << 24) | + ((sq->cur_post & 0xffff) << 8) | + attr->opcode); + wqe_ctrl->qpn_ds = + cpu_to_be32((attr->len + sizeof(struct mlx5hws_wqe_ctrl_seg)) / 16 | + sq->sqn << 8); + wqe_ctrl->imm = cpu_to_be32(attr->id); + + flags |= attr->notify_hw ? MLX5_WQE_CTRL_CQ_UPDATE : 0; + flags |= attr->fence ? MLX5_WQE_CTRL_INITIATOR_SMALL_FENCE : 0; + wqe_ctrl->flags = cpu_to_be32(flags); + + sq->wr_priv[idx].id = attr->id; + sq->wr_priv[idx].retry_id = attr->retry_id; + + sq->wr_priv[idx].rule = attr->rule; + sq->wr_priv[idx].user_data = attr->user_data; + sq->wr_priv[idx].num_wqebbs = ctrl->num_wqebbs; + + if (attr->rule) { + sq->wr_priv[idx].rule->pending_wqes++; + sq->wr_priv[idx].used_id = attr->used_id; + } + + sq->cur_post += ctrl->num_wqebbs; + + if (attr->notify_hw) + hws_send_engine_post_ring(sq, wqe_ctrl); +} + +static void hws_send_wqe(struct mlx5hws_send_engine *queue, + struct mlx5hws_send_engine_post_attr *send_attr, + struct mlx5hws_wqe_gta_ctrl_seg *send_wqe_ctrl, + void *send_wqe_data, + void *send_wqe_tag, + bool is_jumbo, + u8 gta_opcode, + u32 direct_index) +{ + struct mlx5hws_wqe_gta_data_seg_ste *wqe_data; + struct mlx5hws_wqe_gta_ctrl_seg *wqe_ctrl; + struct mlx5hws_send_engine_post_ctrl ctrl; + size_t wqe_len; + + ctrl = mlx5hws_send_engine_post_start(queue); + mlx5hws_send_engine_post_req_wqe(&ctrl, (void *)&wqe_ctrl, &wqe_len); + mlx5hws_send_engine_post_req_wqe(&ctrl, (void *)&wqe_data, &wqe_len); + + wqe_ctrl->op_dirix = cpu_to_be32(gta_opcode << 28 | direct_index); + memcpy(wqe_ctrl->stc_ix, send_wqe_ctrl->stc_ix, + sizeof(send_wqe_ctrl->stc_ix)); + + if (send_wqe_data) + memcpy(wqe_data, send_wqe_data, sizeof(*wqe_data)); + else + hws_send_wqe_set_tag(wqe_data, send_wqe_tag, is_jumbo); + + mlx5hws_send_engine_post_end(&ctrl, send_attr); +} + +void mlx5hws_send_ste(struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ste_attr *ste_attr) +{ + struct mlx5hws_send_engine_post_attr *send_attr = &ste_attr->send_attr; + u8 notify_hw = send_attr->notify_hw; + u8 fence = send_attr->fence; + + if (ste_attr->rtc_1) { + send_attr->id = ste_attr->rtc_1; + send_attr->used_id = ste_attr->used_id_rtc_1; + send_attr->retry_id = ste_attr->retry_rtc_1; + send_attr->fence = fence; + send_attr->notify_hw = notify_hw && !ste_attr->rtc_0; + hws_send_wqe(queue, send_attr, + ste_attr->wqe_ctrl, + ste_attr->wqe_data, + ste_attr->wqe_tag, + ste_attr->wqe_tag_is_jumbo, + ste_attr->gta_opcode, + ste_attr->direct_index); + } + + if (ste_attr->rtc_0) { + send_attr->id = ste_attr->rtc_0; + send_attr->used_id = ste_attr->used_id_rtc_0; + send_attr->retry_id = ste_attr->retry_rtc_0; + send_attr->fence = fence && !ste_attr->rtc_1; + send_attr->notify_hw = notify_hw; + hws_send_wqe(queue, send_attr, + ste_attr->wqe_ctrl, + ste_attr->wqe_data, + ste_attr->wqe_tag, + ste_attr->wqe_tag_is_jumbo, + ste_attr->gta_opcode, + ste_attr->direct_index); + } + + /* Restore to original requested values */ + send_attr->notify_hw = notify_hw; + send_attr->fence = fence; +} + +static void hws_send_engine_retry_post_send(struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ring_priv *priv, + u16 wqe_cnt) +{ + struct mlx5hws_send_engine_post_attr send_attr = {0}; + struct mlx5hws_wqe_gta_data_seg_ste *wqe_data; + struct mlx5hws_wqe_gta_ctrl_seg *wqe_ctrl; + struct mlx5hws_send_engine_post_ctrl ctrl; + struct mlx5hws_send_ring_sq *send_sq; + unsigned int idx; + size_t wqe_len; + char *p; + + send_attr.rule = priv->rule; + send_attr.opcode = MLX5HWS_WQE_OPCODE_TBL_ACCESS; + send_attr.opmod = MLX5HWS_WQE_GTA_OPMOD_STE; + send_attr.len = MLX5_SEND_WQE_BB * 2 - sizeof(struct mlx5hws_wqe_ctrl_seg); + send_attr.notify_hw = 1; + send_attr.fence = 0; + send_attr.user_data = priv->user_data; + send_attr.id = priv->retry_id; + send_attr.used_id = priv->used_id; + + ctrl = mlx5hws_send_engine_post_start(queue); + mlx5hws_send_engine_post_req_wqe(&ctrl, (void *)&wqe_ctrl, &wqe_len); + mlx5hws_send_engine_post_req_wqe(&ctrl, (void *)&wqe_data, &wqe_len); + + send_sq = &ctrl.send_ring->send_sq; + idx = wqe_cnt & send_sq->buf_mask; + p = mlx5_wq_cyc_get_wqe(&send_sq->wq, idx); + + /* Copy old gta ctrl */ + memcpy(wqe_ctrl, p + sizeof(struct mlx5hws_wqe_ctrl_seg), + MLX5_SEND_WQE_BB - sizeof(struct mlx5hws_wqe_ctrl_seg)); + + idx = (wqe_cnt + 1) & send_sq->buf_mask; + p = mlx5_wq_cyc_get_wqe(&send_sq->wq, idx); + + /* Copy old gta data */ + memcpy(wqe_data, p, MLX5_SEND_WQE_BB); + + mlx5hws_send_engine_post_end(&ctrl, &send_attr); +} + +void mlx5hws_send_engine_flush_queue(struct mlx5hws_send_engine *queue) +{ + struct mlx5hws_send_ring_sq *sq = &queue->send_ring.send_sq; + struct mlx5hws_wqe_ctrl_seg *wqe_ctrl; + + wqe_ctrl = mlx5_wq_cyc_get_wqe(&sq->wq, sq->last_idx); + wqe_ctrl->flags |= cpu_to_be32(MLX5_WQE_CTRL_CQ_UPDATE); + + hws_send_engine_post_ring(sq, wqe_ctrl); +} + +static void +hws_send_engine_update_rule_resize(struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ring_priv *priv, + enum mlx5hws_flow_op_status *status) +{ + switch (priv->rule->resize_info->state) { + case MLX5HWS_RULE_RESIZE_STATE_WRITING: + if (priv->rule->status == MLX5HWS_RULE_STATUS_FAILING) { + /* Backup original RTCs */ + u32 orig_rtc_0 = priv->rule->resize_info->rtc_0; + u32 orig_rtc_1 = priv->rule->resize_info->rtc_1; + + /* Delete partially failed move rule using resize_info */ + priv->rule->resize_info->rtc_0 = priv->rule->rtc_0; + priv->rule->resize_info->rtc_1 = priv->rule->rtc_1; + + /* Move rule to original RTC for future delete */ + priv->rule->rtc_0 = orig_rtc_0; + priv->rule->rtc_1 = orig_rtc_1; + } + /* Clean leftovers */ + mlx5hws_rule_move_hws_remove(priv->rule, queue, priv->user_data); + break; + + case MLX5HWS_RULE_RESIZE_STATE_DELETING: + if (priv->rule->status == MLX5HWS_RULE_STATUS_FAILING) { + *status = MLX5HWS_FLOW_OP_ERROR; + } else { + *status = MLX5HWS_FLOW_OP_SUCCESS; + priv->rule->matcher = priv->rule->matcher->resize_dst; + } + priv->rule->resize_info->state = MLX5HWS_RULE_RESIZE_STATE_IDLE; + priv->rule->status = MLX5HWS_RULE_STATUS_CREATED; + break; + + default: + break; + } +} + +static void hws_send_engine_update_rule(struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ring_priv *priv, + u16 wqe_cnt, + enum mlx5hws_flow_op_status *status) +{ + priv->rule->pending_wqes--; + + if (*status == MLX5HWS_FLOW_OP_ERROR) { + if (priv->retry_id) { + hws_send_engine_retry_post_send(queue, priv, wqe_cnt); + return; + } + /* Some part of the rule failed */ + priv->rule->status = MLX5HWS_RULE_STATUS_FAILING; + *priv->used_id = 0; + } else { + *priv->used_id = priv->id; + } + + /* Update rule status for the last completion */ + if (!priv->rule->pending_wqes) { + if (unlikely(mlx5hws_rule_move_in_progress(priv->rule))) { + hws_send_engine_update_rule_resize(queue, priv, status); + return; + } + + if (unlikely(priv->rule->status == MLX5HWS_RULE_STATUS_FAILING)) { + /* Rule completely failed and doesn't require cleanup */ + if (!priv->rule->rtc_0 && !priv->rule->rtc_1) + priv->rule->status = MLX5HWS_RULE_STATUS_FAILED; + + *status = MLX5HWS_FLOW_OP_ERROR; + } else { + /* Increase the status, this only works on good flow as the enum + * is arrange it away creating -> created -> deleting -> deleted + */ + priv->rule->status++; + *status = MLX5HWS_FLOW_OP_SUCCESS; + /* Rule was deleted now we can safely release action STEs + * and clear resize info + */ + if (priv->rule->status == MLX5HWS_RULE_STATUS_DELETED) { + mlx5hws_rule_free_action_ste(priv->rule); + mlx5hws_rule_clear_resize_info(priv->rule); + } + } + } +} + +static void hws_send_engine_update(struct mlx5hws_send_engine *queue, + struct mlx5_cqe64 *cqe, + struct mlx5hws_send_ring_priv *priv, + struct mlx5hws_flow_op_result res[], + s64 *i, + u32 res_nb, + u16 wqe_cnt) +{ + enum mlx5hws_flow_op_status status; + + if (!cqe || (likely(be32_to_cpu(cqe->byte_cnt) >> 31 == 0) && + likely(get_cqe_opcode(cqe) == MLX5_CQE_REQ))) { + status = MLX5HWS_FLOW_OP_SUCCESS; + } else { + status = MLX5HWS_FLOW_OP_ERROR; + } + + if (priv->user_data) { + if (priv->rule) { + hws_send_engine_update_rule(queue, priv, wqe_cnt, &status); + /* Completion is provided on the last rule WQE */ + if (priv->rule->pending_wqes) + return; + } + + if (*i < res_nb) { + res[*i].user_data = priv->user_data; + res[*i].status = status; + (*i)++; + mlx5hws_send_engine_dec_rule(queue); + } else { + mlx5hws_send_engine_gen_comp(queue, priv->user_data, status); + } + } +} + +static int mlx5hws_parse_cqe(struct mlx5hws_send_ring_cq *cq, + struct mlx5_cqe64 *cqe64) +{ + if (unlikely(get_cqe_opcode(cqe64) != MLX5_CQE_REQ)) { + struct mlx5_err_cqe *err_cqe = (struct mlx5_err_cqe *)cqe64; + + mlx5_core_err(cq->mdev, "Bad OP in HWS SQ CQE: 0x%x\n", get_cqe_opcode(cqe64)); + mlx5_core_err(cq->mdev, "vendor_err_synd=%x\n", err_cqe->vendor_err_synd); + mlx5_core_err(cq->mdev, "syndrome=%x\n", err_cqe->syndrome); + print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET, + 16, 1, err_cqe, + sizeof(*err_cqe), false); + return CQ_POLL_ERR; + } + + return CQ_OK; +} + +static int mlx5hws_cq_poll_one(struct mlx5hws_send_ring_cq *cq) +{ + struct mlx5_cqe64 *cqe64; + int err; + + cqe64 = mlx5_cqwq_get_cqe(&cq->wq); + if (!cqe64) { + if (unlikely(cq->mdev->state == + MLX5_DEVICE_STATE_INTERNAL_ERROR)) { + mlx5_core_dbg_once(cq->mdev, + "Polling CQ while device is shutting down\n"); + return CQ_POLL_ERR; + } + return CQ_EMPTY; + } + + mlx5_cqwq_pop(&cq->wq); + err = mlx5hws_parse_cqe(cq, cqe64); + mlx5_cqwq_update_db_record(&cq->wq); + + return err; +} + +static void hws_send_engine_poll_cq(struct mlx5hws_send_engine *queue, + struct mlx5hws_flow_op_result res[], + s64 *polled, + u32 res_nb) +{ + struct mlx5hws_send_ring *send_ring = &queue->send_ring; + struct mlx5hws_send_ring_cq *cq = &send_ring->send_cq; + struct mlx5hws_send_ring_sq *sq = &send_ring->send_sq; + struct mlx5hws_send_ring_priv *priv; + struct mlx5_cqe64 *cqe; + u8 cqe_opcode; + u16 wqe_cnt; + + cqe = mlx5_cqwq_get_cqe(&cq->wq); + if (!cqe) + return; + + cqe_opcode = get_cqe_opcode(cqe); + if (cqe_opcode == MLX5_CQE_INVALID) + return; + + if (unlikely(cqe_opcode != MLX5_CQE_REQ)) + queue->err = true; + + wqe_cnt = be16_to_cpu(cqe->wqe_counter) & sq->buf_mask; + + while (cq->poll_wqe != wqe_cnt) { + priv = &sq->wr_priv[cq->poll_wqe]; + hws_send_engine_update(queue, NULL, priv, res, polled, res_nb, 0); + cq->poll_wqe = (cq->poll_wqe + priv->num_wqebbs) & sq->buf_mask; + } + + priv = &sq->wr_priv[wqe_cnt]; + cq->poll_wqe = (wqe_cnt + priv->num_wqebbs) & sq->buf_mask; + hws_send_engine_update(queue, cqe, priv, res, polled, res_nb, wqe_cnt); + mlx5hws_cq_poll_one(cq); +} + +static void hws_send_engine_poll_list(struct mlx5hws_send_engine *queue, + struct mlx5hws_flow_op_result res[], + s64 *polled, + u32 res_nb) +{ + struct mlx5hws_completed_poll *comp = &queue->completed; + + while (comp->ci != comp->pi) { + if (*polled < res_nb) { + res[*polled].status = + comp->entries[comp->ci].status; + res[*polled].user_data = + comp->entries[comp->ci].user_data; + (*polled)++; + comp->ci = (comp->ci + 1) & comp->mask; + mlx5hws_send_engine_dec_rule(queue); + } else { + return; + } + } +} + +static int hws_send_engine_poll(struct mlx5hws_send_engine *queue, + struct mlx5hws_flow_op_result res[], + u32 res_nb) +{ + s64 polled = 0; + + hws_send_engine_poll_list(queue, res, &polled, res_nb); + + if (polled >= res_nb) + return polled; + + hws_send_engine_poll_cq(queue, res, &polled, res_nb); + + return polled; +} + +int mlx5hws_send_queue_poll(struct mlx5hws_context *ctx, + u16 queue_id, + struct mlx5hws_flow_op_result res[], + u32 res_nb) +{ + return hws_send_engine_poll(&ctx->send_queue[queue_id], res, res_nb); +} + +static int hws_send_ring_alloc_sq(struct mlx5_core_dev *mdev, + int numa_node, + struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ring_sq *sq, + void *sqc_data) +{ + void *sqc_wq = MLX5_ADDR_OF(sqc, sqc_data, wq); + struct mlx5_wq_cyc *wq = &sq->wq; + struct mlx5_wq_param param; + size_t buf_sz; + int err; + + sq->uar_map = mdev->mlx5e_res.hw_objs.bfreg.map; + sq->mdev = mdev; + + param.db_numa_node = numa_node; + param.buf_numa_node = numa_node; + err = mlx5_wq_cyc_create(mdev, ¶m, sqc_wq, wq, &sq->wq_ctrl); + if (err) + return err; + wq->db = &wq->db[MLX5_SND_DBR]; + + buf_sz = queue->num_entries * MAX_WQES_PER_RULE; + sq->dep_wqe = kcalloc(queue->num_entries, sizeof(*sq->dep_wqe), GFP_KERNEL); + if (!sq->dep_wqe) { + err = -ENOMEM; + goto destroy_wq_cyc; + } + + sq->wr_priv = kzalloc(sizeof(*sq->wr_priv) * buf_sz, GFP_KERNEL); + if (!sq->dep_wqe) { + err = -ENOMEM; + goto free_dep_wqe; + } + + sq->buf_mask = (queue->num_entries * MAX_WQES_PER_RULE) - 1; + + return 0; + +free_dep_wqe: + kfree(sq->dep_wqe); +destroy_wq_cyc: + mlx5_wq_destroy(&sq->wq_ctrl); + return err; +} + +static int hws_send_ring_create_sq(struct mlx5_core_dev *mdev, u32 pdn, + void *sqc_data, + struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ring_sq *sq, + struct mlx5hws_send_ring_cq *cq) +{ + void *in, *sqc, *wq; + int inlen, err; + u8 ts_format; + + inlen = MLX5_ST_SZ_BYTES(create_sq_in) + + sizeof(u64) * sq->wq_ctrl.buf.npages; + in = kvzalloc(inlen, GFP_KERNEL); + if (!in) + return -ENOMEM; + + sqc = MLX5_ADDR_OF(create_sq_in, in, ctx); + wq = MLX5_ADDR_OF(sqc, sqc, wq); + + memcpy(sqc, sqc_data, MLX5_ST_SZ_BYTES(sqc)); + MLX5_SET(sqc, sqc, cqn, cq->mcq.cqn); + + MLX5_SET(sqc, sqc, state, MLX5_SQC_STATE_RST); + MLX5_SET(sqc, sqc, flush_in_error_en, 1); + + ts_format = mlx5_is_real_time_sq(mdev) ? MLX5_TIMESTAMP_FORMAT_REAL_TIME : + MLX5_TIMESTAMP_FORMAT_FREE_RUNNING; + MLX5_SET(sqc, sqc, ts_format, ts_format); + + MLX5_SET(wq, wq, wq_type, MLX5_WQ_TYPE_CYCLIC); + MLX5_SET(wq, wq, uar_page, mdev->mlx5e_res.hw_objs.bfreg.index); + MLX5_SET(wq, wq, log_wq_pg_sz, sq->wq_ctrl.buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT); + MLX5_SET64(wq, wq, dbr_addr, sq->wq_ctrl.db.dma); + + mlx5_fill_page_frag_array(&sq->wq_ctrl.buf, + (__be64 *)MLX5_ADDR_OF(wq, wq, pas)); + + err = mlx5_core_create_sq(mdev, in, inlen, &sq->sqn); + + kvfree(in); + + return err; +} + +static int hws_send_ring_set_sq_rdy(struct mlx5_core_dev *mdev, u32 sqn) +{ + void *in, *sqc; + int inlen, err; + + inlen = MLX5_ST_SZ_BYTES(modify_sq_in); + in = kvzalloc(inlen, GFP_KERNEL); + if (!in) + return -ENOMEM; + + MLX5_SET(modify_sq_in, in, sq_state, MLX5_SQC_STATE_RST); + sqc = MLX5_ADDR_OF(modify_sq_in, in, ctx); + MLX5_SET(sqc, sqc, state, MLX5_SQC_STATE_RDY); + + err = mlx5_core_modify_sq(mdev, sqn, in); + + kvfree(in); + + return err; +} + +static void hws_send_ring_close_sq(struct mlx5hws_send_ring_sq *sq) +{ + mlx5_core_destroy_sq(sq->mdev, sq->sqn); + mlx5_wq_destroy(&sq->wq_ctrl); + kfree(sq->wr_priv); + kfree(sq->dep_wqe); +} + +static int hws_send_ring_create_sq_rdy(struct mlx5_core_dev *mdev, u32 pdn, + void *sqc_data, + struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ring_sq *sq, + struct mlx5hws_send_ring_cq *cq) +{ + int err; + + err = hws_send_ring_create_sq(mdev, pdn, sqc_data, queue, sq, cq); + if (err) + return err; + + err = hws_send_ring_set_sq_rdy(mdev, sq->sqn); + if (err) + hws_send_ring_close_sq(sq); + + return err; +} + +static int hws_send_ring_open_sq(struct mlx5hws_context *ctx, + int numa_node, + struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ring_sq *sq, + struct mlx5hws_send_ring_cq *cq) +{ + size_t buf_sz, sq_log_buf_sz; + void *sqc_data, *wq; + int err; + + sqc_data = kvzalloc(MLX5_ST_SZ_BYTES(sqc), GFP_KERNEL); + if (!sqc_data) + return -ENOMEM; + + buf_sz = queue->num_entries * MAX_WQES_PER_RULE; + sq_log_buf_sz = ilog2(roundup_pow_of_two(buf_sz)); + + wq = MLX5_ADDR_OF(sqc, sqc_data, wq); + MLX5_SET(wq, wq, log_wq_stride, ilog2(MLX5_SEND_WQE_BB)); + MLX5_SET(wq, wq, pd, ctx->pd_num); + MLX5_SET(wq, wq, log_wq_sz, sq_log_buf_sz); + + err = hws_send_ring_alloc_sq(ctx->mdev, numa_node, queue, sq, sqc_data); + if (err) + goto err_out; + + err = hws_send_ring_create_sq_rdy(ctx->mdev, ctx->pd_num, sqc_data, + queue, sq, cq); + if (err) { + kfree(sq->dep_wqe); + return err; + } + + kvfree(sqc_data); + + return 0; +err_out: + kvfree(sqc_data); + return err; +} + +static void hws_cq_complete(struct mlx5_core_cq *mcq, + struct mlx5_eqe *eqe) +{ + pr_err("CQ completion CQ: #%u\n", mcq->cqn); +} + +static int hws_send_ring_alloc_cq(struct mlx5_core_dev *mdev, + int numa_node, + struct mlx5hws_send_engine *queue, + void *cqc_data, + struct mlx5hws_send_ring_cq *cq) +{ + struct mlx5_core_cq *mcq = &cq->mcq; + struct mlx5_wq_param param; + struct mlx5_cqe64 *cqe; + int err; + u32 i; + + param.buf_numa_node = numa_node; + param.db_numa_node = numa_node; + + err = mlx5_cqwq_create(mdev, ¶m, cqc_data, &cq->wq, &cq->wq_ctrl); + if (err) + return err; + + mcq->cqe_sz = 64; + mcq->set_ci_db = cq->wq_ctrl.db.db; + mcq->arm_db = cq->wq_ctrl.db.db + 1; + mcq->comp = hws_cq_complete; + + for (i = 0; i < mlx5_cqwq_get_size(&cq->wq); i++) { + cqe = mlx5_cqwq_get_wqe(&cq->wq, i); + cqe->op_own = 0xf1; + } + + cq->mdev = mdev; + + return 0; +} + +static int hws_send_ring_create_cq(struct mlx5_core_dev *mdev, + struct mlx5hws_send_engine *queue, + void *cqc_data, + struct mlx5hws_send_ring_cq *cq) +{ + u32 out[MLX5_ST_SZ_DW(create_cq_out)]; + struct mlx5_core_cq *mcq = &cq->mcq; + void *in, *cqc; + int inlen, eqn; + int err; + + err = mlx5_comp_eqn_get(mdev, 0, &eqn); + if (err) + return err; + + inlen = MLX5_ST_SZ_BYTES(create_cq_in) + + sizeof(u64) * cq->wq_ctrl.buf.npages; + in = kvzalloc(inlen, GFP_KERNEL); + if (!in) + return -ENOMEM; + + cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context); + memcpy(cqc, cqc_data, MLX5_ST_SZ_BYTES(cqc)); + mlx5_fill_page_frag_array(&cq->wq_ctrl.buf, + (__be64 *)MLX5_ADDR_OF(create_cq_in, in, pas)); + + MLX5_SET(cqc, cqc, c_eqn_or_apu_element, eqn); + MLX5_SET(cqc, cqc, uar_page, mdev->priv.uar->index); + MLX5_SET(cqc, cqc, log_page_size, cq->wq_ctrl.buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT); + MLX5_SET64(cqc, cqc, dbr_addr, cq->wq_ctrl.db.dma); + + err = mlx5_core_create_cq(mdev, mcq, in, inlen, out, sizeof(out)); + + kvfree(in); + + return err; +} + +static int hws_send_ring_open_cq(struct mlx5_core_dev *mdev, + struct mlx5hws_send_engine *queue, + int numa_node, + struct mlx5hws_send_ring_cq *cq) +{ + void *cqc_data; + int err; + + cqc_data = kvzalloc(MLX5_ST_SZ_BYTES(cqc), GFP_KERNEL); + if (!cqc_data) + return -ENOMEM; + + MLX5_SET(cqc, cqc_data, uar_page, mdev->priv.uar->index); + MLX5_SET(cqc, cqc_data, cqe_sz, queue->num_entries); + MLX5_SET(cqc, cqc_data, log_cq_size, ilog2(queue->num_entries)); + + err = hws_send_ring_alloc_cq(mdev, numa_node, queue, cqc_data, cq); + if (err) { + goto err_out; + return err; + } + + err = hws_send_ring_create_cq(mdev, queue, cqc_data, cq); + if (err) + goto err_free_cq; + + kvfree(cqc_data); + + return 0; + +err_free_cq: + mlx5_wq_destroy(&cq->wq_ctrl); +err_out: + kvfree(cqc_data); + return err; +} + +static void hws_send_ring_close_cq(struct mlx5hws_send_ring_cq *cq) +{ + mlx5_core_destroy_cq(cq->mdev, &cq->mcq); + mlx5_wq_destroy(&cq->wq_ctrl); +} + +static void hws_send_ring_close(struct mlx5hws_send_engine *queue) +{ + hws_send_ring_close_sq(&queue->send_ring.send_sq); + hws_send_ring_close_cq(&queue->send_ring.send_cq); +} + +static int mlx5hws_send_ring_open(struct mlx5hws_context *ctx, + struct mlx5hws_send_engine *queue) +{ + int numa_node = dev_to_node(mlx5_core_dma_dev(ctx->mdev)); + struct mlx5hws_send_ring *ring = &queue->send_ring; + int err; + + err = hws_send_ring_open_cq(ctx->mdev, queue, numa_node, &ring->send_cq); + if (err) + return err; + + err = hws_send_ring_open_sq(ctx, numa_node, queue, &ring->send_sq, + &ring->send_cq); + if (err) + goto close_cq; + + return err; + +close_cq: + hws_send_ring_close_cq(&ring->send_cq); + return err; +} + +void mlx5hws_send_queue_close(struct mlx5hws_send_engine *queue) +{ + hws_send_ring_close(queue); + kfree(queue->completed.entries); +} + +int mlx5hws_send_queue_open(struct mlx5hws_context *ctx, + struct mlx5hws_send_engine *queue, + u16 queue_size) +{ + int err; + + mutex_init(&queue->lock); + + queue->num_entries = roundup_pow_of_two(queue_size); + queue->used_entries = 0; + + queue->completed.entries = kcalloc(queue->num_entries, + sizeof(queue->completed.entries[0]), + GFP_KERNEL); + if (!queue->completed.entries) + return -ENOMEM; + + queue->completed.pi = 0; + queue->completed.ci = 0; + queue->completed.mask = queue->num_entries - 1; + err = mlx5hws_send_ring_open(ctx, queue); + if (err) + goto free_completed_entries; + + return 0; + +free_completed_entries: + kfree(queue->completed.entries); + return err; +} + +static void __hws_send_queues_close(struct mlx5hws_context *ctx, u16 queues) +{ + while (queues--) + mlx5hws_send_queue_close(&ctx->send_queue[queues]); +} + +static void hws_send_queues_bwc_locks_destroy(struct mlx5hws_context *ctx) +{ + int bwc_queues = ctx->queues - 1; + int i; + + if (!mlx5hws_context_bwc_supported(ctx)) + return; + + for (i = 0; i < bwc_queues; i++) + mutex_destroy(&ctx->bwc_send_queue_locks[i]); + kfree(ctx->bwc_send_queue_locks); +} + +void mlx5hws_send_queues_close(struct mlx5hws_context *ctx) +{ + hws_send_queues_bwc_locks_destroy(ctx); + __hws_send_queues_close(ctx, ctx->queues); + kfree(ctx->send_queue); +} + +static int hws_bwc_send_queues_init(struct mlx5hws_context *ctx) +{ + /* Number of BWC queues is equal to number of the usual HWS queues */ + int bwc_queues = ctx->queues - 1; + int i; + + if (!mlx5hws_context_bwc_supported(ctx)) + return 0; + + ctx->queues += bwc_queues; + + ctx->bwc_send_queue_locks = kcalloc(bwc_queues, + sizeof(*ctx->bwc_send_queue_locks), + GFP_KERNEL); + + if (!ctx->bwc_send_queue_locks) + return -ENOMEM; + + for (i = 0; i < bwc_queues; i++) + mutex_init(&ctx->bwc_send_queue_locks[i]); + + return 0; +} + +int mlx5hws_send_queues_open(struct mlx5hws_context *ctx, + u16 queues, + u16 queue_size) +{ + int err = 0; + u32 i; + + /* Open one extra queue for control path */ + ctx->queues = queues + 1; + + /* open a separate set of queues and locks for bwc API */ + err = hws_bwc_send_queues_init(ctx); + if (err) + return err; + + ctx->send_queue = kcalloc(ctx->queues, sizeof(*ctx->send_queue), GFP_KERNEL); + if (!ctx->send_queue) { + err = -ENOMEM; + goto free_bwc_locks; + } + + for (i = 0; i < ctx->queues; i++) { + err = mlx5hws_send_queue_open(ctx, &ctx->send_queue[i], queue_size); + if (err) + goto close_send_queues; + } + + return 0; + +close_send_queues: + __hws_send_queues_close(ctx, i); + + kfree(ctx->send_queue); + +free_bwc_locks: + hws_send_queues_bwc_locks_destroy(ctx); + + return err; +} + +int mlx5hws_send_queue_action(struct mlx5hws_context *ctx, + u16 queue_id, + u32 actions) +{ + struct mlx5hws_send_ring_sq *send_sq; + struct mlx5hws_send_engine *queue; + bool wait_comp = false; + s64 polled = 0; + + queue = &ctx->send_queue[queue_id]; + send_sq = &queue->send_ring.send_sq; + + switch (actions) { + case MLX5HWS_SEND_QUEUE_ACTION_DRAIN_SYNC: + wait_comp = true; + fallthrough; + case MLX5HWS_SEND_QUEUE_ACTION_DRAIN_ASYNC: + if (send_sq->head_dep_idx != send_sq->tail_dep_idx) + /* Send dependent WQEs to drain the queue */ + mlx5hws_send_all_dep_wqe(queue); + else + /* Signal on the last posted WQE */ + mlx5hws_send_engine_flush_queue(queue); + + /* Poll queue until empty */ + while (wait_comp && !mlx5hws_send_engine_empty(queue)) + hws_send_engine_poll_cq(queue, NULL, &polled, 0); + + break; + default: + return -EINVAL; + } + + return 0; +} + +static int +hws_send_wqe_fw(struct mlx5_core_dev *mdev, + u32 pd_num, + struct mlx5hws_send_engine_post_attr *send_attr, + struct mlx5hws_wqe_gta_ctrl_seg *send_wqe_ctrl, + void *send_wqe_match_data, + void *send_wqe_match_tag, + void *send_wqe_range_data, + void *send_wqe_range_tag, + bool is_jumbo, + u8 gta_opcode) +{ + bool has_range = send_wqe_range_data || send_wqe_range_tag; + bool has_match = send_wqe_match_data || send_wqe_match_tag; + struct mlx5hws_wqe_gta_data_seg_ste gta_wqe_data0 = {0}; + struct mlx5hws_wqe_gta_data_seg_ste gta_wqe_data1 = {0}; + struct mlx5hws_wqe_gta_ctrl_seg gta_wqe_ctrl = {0}; + struct mlx5hws_cmd_generate_wqe_attr attr = {0}; + struct mlx5hws_wqe_ctrl_seg wqe_ctrl = {0}; + struct mlx5_cqe64 cqe; + u32 flags = 0; + int ret; + + /* Set WQE control */ + wqe_ctrl.opmod_idx_opcode = cpu_to_be32((send_attr->opmod << 24) | send_attr->opcode); + wqe_ctrl.qpn_ds = cpu_to_be32((send_attr->len + sizeof(struct mlx5hws_wqe_ctrl_seg)) / 16); + flags |= send_attr->notify_hw ? MLX5_WQE_CTRL_CQ_UPDATE : 0; + wqe_ctrl.flags = cpu_to_be32(flags); + wqe_ctrl.imm = cpu_to_be32(send_attr->id); + + /* Set GTA WQE CTRL */ + memcpy(gta_wqe_ctrl.stc_ix, send_wqe_ctrl->stc_ix, sizeof(send_wqe_ctrl->stc_ix)); + gta_wqe_ctrl.op_dirix = cpu_to_be32(gta_opcode << 28); + + /* Set GTA match WQE DATA */ + if (has_match) { + if (send_wqe_match_data) + memcpy(>a_wqe_data0, send_wqe_match_data, sizeof(gta_wqe_data0)); + else + hws_send_wqe_set_tag(>a_wqe_data0, send_wqe_match_tag, is_jumbo); + + gta_wqe_data0.rsvd1_definer = cpu_to_be32(send_attr->match_definer_id << 8); + attr.gta_data_0 = (u8 *)>a_wqe_data0; + } + + /* Set GTA range WQE DATA */ + if (has_range) { + if (send_wqe_range_data) + memcpy(>a_wqe_data1, send_wqe_range_data, sizeof(gta_wqe_data1)); + else + hws_send_wqe_set_tag(>a_wqe_data1, send_wqe_range_tag, false); + + gta_wqe_data1.rsvd1_definer = cpu_to_be32(send_attr->range_definer_id << 8); + attr.gta_data_1 = (u8 *)>a_wqe_data1; + } + + attr.pdn = pd_num; + attr.wqe_ctrl = (u8 *)&wqe_ctrl; + attr.gta_ctrl = (u8 *)>a_wqe_ctrl; + +send_wqe: + ret = mlx5hws_cmd_generate_wqe(mdev, &attr, &cqe); + if (ret) { + mlx5_core_err(mdev, "Failed to write WQE using command"); + return ret; + } + + if ((get_cqe_opcode(&cqe) == MLX5_CQE_REQ) && + (cpu_to_be32(cqe.byte_cnt) >> 31 == 0)) { + *send_attr->used_id = send_attr->id; + return 0; + } + + /* Retry if rule failed */ + if (send_attr->retry_id) { + wqe_ctrl.imm = cpu_to_be32(send_attr->retry_id); + send_attr->id = send_attr->retry_id; + send_attr->retry_id = 0; + goto send_wqe; + } + + return -1; +} + +void mlx5hws_send_stes_fw(struct mlx5hws_context *ctx, + struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ste_attr *ste_attr) +{ + struct mlx5hws_send_engine_post_attr *send_attr = &ste_attr->send_attr; + struct mlx5hws_rule *rule = send_attr->rule; + struct mlx5_core_dev *mdev; + u16 queue_id; + u32 pdn; + int ret; + + queue_id = queue - ctx->send_queue; + mdev = ctx->mdev; + pdn = ctx->pd_num; + + /* Writing through FW can't HW fence, therefore we drain the queue */ + if (send_attr->fence) + mlx5hws_send_queue_action(ctx, + queue_id, + MLX5HWS_SEND_QUEUE_ACTION_DRAIN_SYNC); + + if (ste_attr->rtc_1) { + send_attr->id = ste_attr->rtc_1; + send_attr->used_id = ste_attr->used_id_rtc_1; + send_attr->retry_id = ste_attr->retry_rtc_1; + ret = hws_send_wqe_fw(mdev, pdn, send_attr, + ste_attr->wqe_ctrl, + ste_attr->wqe_data, + ste_attr->wqe_tag, + ste_attr->range_wqe_data, + ste_attr->range_wqe_tag, + ste_attr->wqe_tag_is_jumbo, + ste_attr->gta_opcode); + if (ret) + goto fail_rule; + } + + if (ste_attr->rtc_0) { + send_attr->id = ste_attr->rtc_0; + send_attr->used_id = ste_attr->used_id_rtc_0; + send_attr->retry_id = ste_attr->retry_rtc_0; + ret = hws_send_wqe_fw(mdev, pdn, send_attr, + ste_attr->wqe_ctrl, + ste_attr->wqe_data, + ste_attr->wqe_tag, + ste_attr->range_wqe_data, + ste_attr->range_wqe_tag, + ste_attr->wqe_tag_is_jumbo, + ste_attr->gta_opcode); + if (ret) + goto fail_rule; + } + + /* Increase the status, this only works on good flow as the enum + * is arrange it away creating -> created -> deleting -> deleted + */ + if (likely(rule)) + rule->status++; + + mlx5hws_send_engine_gen_comp(queue, send_attr->user_data, MLX5HWS_FLOW_OP_SUCCESS); + + return; + +fail_rule: + if (likely(rule)) + rule->status = !rule->rtc_0 && !rule->rtc_1 ? + MLX5HWS_RULE_STATUS_FAILED : MLX5HWS_RULE_STATUS_FAILING; + + mlx5hws_send_engine_gen_comp(queue, send_attr->user_data, MLX5HWS_FLOW_OP_ERROR); +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.h new file mode 100644 index 000000000000..b50825d6dc53 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_send.h @@ -0,0 +1,270 @@ +/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ +/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */ + +#ifndef MLX5HWS_SEND_H_ +#define MLX5HWS_SEND_H_ + +/* As a single operation requires at least two WQEBBS. + * This means a maximum of 16 such operations per rule. + */ +#define MAX_WQES_PER_RULE 32 + +enum mlx5hws_wqe_opcode { + MLX5HWS_WQE_OPCODE_TBL_ACCESS = 0x2c, +}; + +enum mlx5hws_wqe_opmod { + MLX5HWS_WQE_OPMOD_GTA_STE = 0, + MLX5HWS_WQE_OPMOD_GTA_MOD_ARG = 1, +}; + +enum mlx5hws_wqe_gta_opcode { + MLX5HWS_WQE_GTA_OP_ACTIVATE = 0, + MLX5HWS_WQE_GTA_OP_DEACTIVATE = 1, +}; + +enum mlx5hws_wqe_gta_opmod { + MLX5HWS_WQE_GTA_OPMOD_STE = 0, + MLX5HWS_WQE_GTA_OPMOD_MOD_ARG = 1, +}; + +enum mlx5hws_wqe_gta_sz { + MLX5HWS_WQE_SZ_GTA_CTRL = 48, + MLX5HWS_WQE_SZ_GTA_DATA = 64, +}; + +/* WQE Control segment. */ +struct mlx5hws_wqe_ctrl_seg { + __be32 opmod_idx_opcode; + __be32 qpn_ds; + __be32 flags; + __be32 imm; +}; + +struct mlx5hws_wqe_gta_ctrl_seg { + __be32 op_dirix; + __be32 stc_ix[5]; + __be32 rsvd0[6]; +}; + +struct mlx5hws_wqe_gta_data_seg_ste { + __be32 rsvd0_ctr_id; + __be32 rsvd1_definer; + __be32 rsvd2[3]; + union { + struct { + __be32 action[3]; + __be32 tag[8]; + }; + __be32 jumbo[11]; + }; +}; + +struct mlx5hws_wqe_gta_data_seg_arg { + __be32 action_args[8]; +}; + +struct mlx5hws_wqe_gta { + struct mlx5hws_wqe_gta_ctrl_seg gta_ctrl; + union { + struct mlx5hws_wqe_gta_data_seg_ste seg_ste; + struct mlx5hws_wqe_gta_data_seg_arg seg_arg; + }; +}; + +struct mlx5hws_send_ring_cq { + struct mlx5_core_dev *mdev; + struct mlx5_cqwq wq; + struct mlx5_wq_ctrl wq_ctrl; + struct mlx5_core_cq mcq; + u16 poll_wqe; +}; + +struct mlx5hws_send_ring_priv { + struct mlx5hws_rule *rule; + void *user_data; + u32 num_wqebbs; + u32 id; + u32 retry_id; + u32 *used_id; +}; + +struct mlx5hws_send_ring_dep_wqe { + struct mlx5hws_wqe_gta_ctrl_seg wqe_ctrl; + struct mlx5hws_wqe_gta_data_seg_ste wqe_data; + struct mlx5hws_rule *rule; + u32 rtc_0; + u32 rtc_1; + u32 retry_rtc_0; + u32 retry_rtc_1; + u32 direct_index; + void *user_data; +}; + +struct mlx5hws_send_ring_sq { + struct mlx5_core_dev *mdev; + u16 cur_post; + u16 buf_mask; + struct mlx5hws_send_ring_priv *wr_priv; + unsigned int last_idx; + struct mlx5hws_send_ring_dep_wqe *dep_wqe; + unsigned int head_dep_idx; + unsigned int tail_dep_idx; + u32 sqn; + struct mlx5_wq_cyc wq; + struct mlx5_wq_ctrl wq_ctrl; + void __iomem *uar_map; +}; + +struct mlx5hws_send_ring { + struct mlx5hws_send_ring_cq send_cq; + struct mlx5hws_send_ring_sq send_sq; +}; + +struct mlx5hws_completed_poll_entry { + void *user_data; + enum mlx5hws_flow_op_status status; +}; + +struct mlx5hws_completed_poll { + struct mlx5hws_completed_poll_entry *entries; + u16 ci; + u16 pi; + u16 mask; +}; + +struct mlx5hws_send_engine { + struct mlx5hws_send_ring send_ring; + struct mlx5_uars_page *uar; /* Uar is shared between rings of a queue */ + struct mlx5hws_completed_poll completed; + u16 used_entries; + u16 num_entries; + bool err; + struct mutex lock; /* Protects the send engine */ +}; + +struct mlx5hws_send_engine_post_ctrl { + struct mlx5hws_send_engine *queue; + struct mlx5hws_send_ring *send_ring; + size_t num_wqebbs; +}; + +struct mlx5hws_send_engine_post_attr { + u8 opcode; + u8 opmod; + u8 notify_hw; + u8 fence; + u8 match_definer_id; + u8 range_definer_id; + size_t len; + struct mlx5hws_rule *rule; + u32 id; + u32 retry_id; + u32 *used_id; + void *user_data; +}; + +struct mlx5hws_send_ste_attr { + u32 rtc_0; + u32 rtc_1; + u32 retry_rtc_0; + u32 retry_rtc_1; + u32 *used_id_rtc_0; + u32 *used_id_rtc_1; + bool wqe_tag_is_jumbo; + u8 gta_opcode; + u32 direct_index; + struct mlx5hws_send_engine_post_attr send_attr; + struct mlx5hws_rule_match_tag *wqe_tag; + struct mlx5hws_rule_match_tag *range_wqe_tag; + struct mlx5hws_wqe_gta_ctrl_seg *wqe_ctrl; + struct mlx5hws_wqe_gta_data_seg_ste *wqe_data; + struct mlx5hws_wqe_gta_data_seg_ste *range_wqe_data; +}; + +struct mlx5hws_send_ring_dep_wqe * +mlx5hws_send_add_new_dep_wqe(struct mlx5hws_send_engine *queue); + +void mlx5hws_send_abort_new_dep_wqe(struct mlx5hws_send_engine *queue); + +void mlx5hws_send_all_dep_wqe(struct mlx5hws_send_engine *queue); + +void mlx5hws_send_queue_close(struct mlx5hws_send_engine *queue); + +int mlx5hws_send_queue_open(struct mlx5hws_context *ctx, + struct mlx5hws_send_engine *queue, + u16 queue_size); + +void mlx5hws_send_queues_close(struct mlx5hws_context *ctx); + +int mlx5hws_send_queues_open(struct mlx5hws_context *ctx, + u16 queues, + u16 queue_size); + +int mlx5hws_send_queue_action(struct mlx5hws_context *ctx, + u16 queue_id, + u32 actions); + +int mlx5hws_send_test(struct mlx5hws_context *ctx, + u16 queues, + u16 queue_size); + +struct mlx5hws_send_engine_post_ctrl +mlx5hws_send_engine_post_start(struct mlx5hws_send_engine *queue); + +void mlx5hws_send_engine_post_req_wqe(struct mlx5hws_send_engine_post_ctrl *ctrl, + char **buf, size_t *len); + +void mlx5hws_send_engine_post_end(struct mlx5hws_send_engine_post_ctrl *ctrl, + struct mlx5hws_send_engine_post_attr *attr); + +void mlx5hws_send_ste(struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ste_attr *ste_attr); + +void mlx5hws_send_stes_fw(struct mlx5hws_context *ctx, + struct mlx5hws_send_engine *queue, + struct mlx5hws_send_ste_attr *ste_attr); + +void mlx5hws_send_engine_flush_queue(struct mlx5hws_send_engine *queue); + +static inline bool mlx5hws_send_engine_empty(struct mlx5hws_send_engine *queue) +{ + struct mlx5hws_send_ring_sq *send_sq = &queue->send_ring.send_sq; + struct mlx5hws_send_ring_cq *send_cq = &queue->send_ring.send_cq; + + return ((send_sq->cur_post & send_sq->buf_mask) == send_cq->poll_wqe); +} + +static inline bool mlx5hws_send_engine_full(struct mlx5hws_send_engine *queue) +{ + return queue->used_entries >= queue->num_entries; +} + +static inline void mlx5hws_send_engine_inc_rule(struct mlx5hws_send_engine *queue) +{ + queue->used_entries++; +} + +static inline void mlx5hws_send_engine_dec_rule(struct mlx5hws_send_engine *queue) +{ + queue->used_entries--; +} + +static inline void mlx5hws_send_engine_gen_comp(struct mlx5hws_send_engine *queue, + void *user_data, + int comp_status) +{ + struct mlx5hws_completed_poll *comp = &queue->completed; + + comp->entries[comp->pi].status = comp_status; + comp->entries[comp->pi].user_data = user_data; + + comp->pi = (comp->pi + 1) & comp->mask; +} + +static inline bool mlx5hws_send_engine_err(struct mlx5hws_send_engine *queue) +{ + return queue->err; +} + +#endif /* MLX5HWS_SEND_H_ */