From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8F331EB64DC for ; Mon, 17 Jul 2023 06:08:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229920AbjGQGIF (ORCPT ); Mon, 17 Jul 2023 02:08:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48746 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231437AbjGQGHx (ORCPT ); Mon, 17 Jul 2023 02:07:53 -0400 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 309D3E67 for ; Sun, 16 Jul 2023 23:07:24 -0700 (PDT) Received: by mail-pl1-x62e.google.com with SMTP id d9443c01a7336-1bb2468257fso7039785ad.0 for ; Sun, 16 Jul 2023 23:07:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1689574030; x=1692166030; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=2xFVRjzChlfL32XF9Qls5pCyYcC+GZUnsuC7GMpORfU=; b=h6EhnjIH7rsXSP92pzeatEELmHT2GK7GQdv9/gAAAurWbrTjg8xxX1UgSG6FCGKlT3 2Y3AjPaHg8w3nVQadTvtKJKBbBZvws1y5inJNddTLoZUee2JPd55SZUDkbgFPZrDQ2Rb AeWIHjEoyoMvAwWbeD5v2wMdz/s9JaDYgLzec= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689574030; x=1692166030; h=references:in-reply-to:message-id:date:subject:cc:to:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=2xFVRjzChlfL32XF9Qls5pCyYcC+GZUnsuC7GMpORfU=; b=XPebeAC/nuJZ0ZJaeL3h8vxCd4v6Gg+rpHnhFveQkiPgKO4w1D8VMvLcJcwWS1pe3F +cUETHyKXtRO3rv+PXIAmXDOro/XQuaZP3KCEQmQ4iaEvr/lqiYLEaVEqryAQSEAWzHy ySC10vSdG+KyFGp8QKZwtZev86LofU3vzvl/PsWHD8Bu7dA5NXRT3OKsqPLkh4m67kEC G2CfTCrktDSr3Fy/00Zghs4tcNrTXzkv7XNR084eDavdfSrcrkNLyTnuEhvJBbi0UZjo tzD/nUJuZWgD0yWkX3AsfvPHTD6kZt77hO1ebh2DFKlC+5k0bm15mjYlcnA224QuG9xt e3LQ== X-Gm-Message-State: ABy/qLYecAiak4O+24PwdAXbXYMEZJ8QNnYo5tfyeGn+YTMH7WSLhwHi 9rWShlpCnn9/Lxg3p0g6D67n1w== X-Google-Smtp-Source: APBJJlGw1hYpDGRAY4eZNiaVgiQlL/w8gAjo0oStA2HThZCJXsvS0aItrplxSNWDzi7/i+ooSfvpPQ== X-Received: by 2002:a17:902:e549:b0:1b8:aef2:773e with SMTP id n9-20020a170902e54900b001b8aef2773emr12516062plf.46.1689574030558; Sun, 16 Jul 2023 23:07:10 -0700 (PDT) Received: from dhcp-10-192-206-197.iig.avagotech.net.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id q17-20020a170902789100b001b9da7b6bc3sm11849632pll.184.2023.07.16.23.07.07 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 16 Jul 2023 23:07:09 -0700 (PDT) From: Selvin Xavier To: jgg@ziepe.ca, leon@kernel.org Cc: linux-rdma@vger.kernel.org, andrew.gospodarek@broadcom.com, michael.chan@broadcom.com, Chandramohan Akula , Selvin Xavier Subject: [PATCH for-next v2 3/7] RDMA/bnxt_re: Initialize Doorbell pacing feature Date: Sun, 16 Jul 2023 22:53:10 -0700 Message-Id: <1689573194-27687-4-git-send-email-selvin.xavier@broadcom.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1689573194-27687-1-git-send-email-selvin.xavier@broadcom.com> References: <1689573194-27687-1-git-send-email-selvin.xavier@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000effefe0600a89bda" Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org --000000000000effefe0600a89bda From: Chandramohan Akula Checks for pacing feature capability and get the doorbell pacing configuration using FW commands. Allocate a page and initialize the pacing parameters for the applications. Cleanup the page and de-initialize the pacing during device removal. Signed-off-by: Chandramohan Akula Signed-off-by: Selvin Xavier --- drivers/infiniband/hw/bnxt_re/bnxt_re.h | 22 +++++++ drivers/infiniband/hw/bnxt_re/main.c | 96 +++++++++++++++++++++++++++++++ drivers/infiniband/hw/bnxt_re/qplib_res.h | 19 ++++++ 3 files changed, 137 insertions(+) diff --git a/drivers/infiniband/hw/bnxt_re/bnxt_re.h b/drivers/infiniband/hw/bnxt_re/bnxt_re.h index ea81b24..1543f80 100644 --- a/drivers/infiniband/hw/bnxt_re/bnxt_re.h +++ b/drivers/infiniband/hw/bnxt_re/bnxt_re.h @@ -112,6 +112,27 @@ struct bnxt_re_gsi_context { #define BNXT_RE_NQ_IDX 1 #define BNXT_RE_GEN_P5_MAX_VF 64 +struct bnxt_re_pacing { + u64 dbr_db_fifo_reg_off; + void *dbr_page; + u64 dbr_bar_addr; + u32 pacing_algo_th; + u32 do_pacing_save; + u32 dbq_pacing_time; /* ms */ + u32 dbr_def_do_pacing; + bool dbr_pacing; +}; + +#define BNXT_RE_DBR_PACING_TIME 5 /* ms */ +#define BNXT_RE_PACING_ALGO_THRESHOLD 250 /* Entries in DB FIFO */ +#define BNXT_RE_PACING_ALARM_TH_MULTIPLE 2 /* Multiple of pacing algo threshold */ +/* Default do_pacing value when there is no congestion */ +#define BNXT_RE_DBR_DO_PACING_NO_CONGESTION 0x7F /* 1 in 512 probability */ +#define BNXT_RE_DB_FIFO_ROOM_MASK 0x1FFF8000 +#define BNXT_RE_MAX_FIFO_DEPTH 0x2c00 +#define BNXT_RE_DB_FIFO_ROOM_SHIFT 15 +#define BNXT_RE_GRC_FIFO_REG_BASE 0x2000 + struct bnxt_re_dev { struct ib_device ibdev; struct list_head list; @@ -171,6 +192,7 @@ struct bnxt_re_dev { atomic_t nq_alloc_cnt; u32 is_virtfn; u32 num_vfs; + struct bnxt_re_pacing pacing; }; #define to_bnxt_re_dev(ptr, member) \ diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c index b42166f..13cd84d 100644 --- a/drivers/infiniband/hw/bnxt_re/main.c +++ b/drivers/infiniband/hw/bnxt_re/main.c @@ -432,9 +432,92 @@ int bnxt_re_hwrm_qcaps(struct bnxt_re_dev *rdev) return rc; cctx->modes.db_push = le32_to_cpu(resp.flags) & FUNC_QCAPS_RESP_FLAGS_WCB_PUSH_MODE; + cctx->modes.dbr_pacing = + le32_to_cpu(resp.flags_ext2) & FUNC_QCAPS_RESP_FLAGS_EXT2_DBR_PACING_EXT_SUPPORTED ? + true : false; return 0; } +static int bnxt_re_hwrm_dbr_pacing_qcfg(struct bnxt_re_dev *rdev) +{ + struct hwrm_func_dbr_pacing_qcfg_output resp = {}; + struct hwrm_func_dbr_pacing_qcfg_input req = {}; + struct bnxt_en_dev *en_dev = rdev->en_dev; + struct bnxt_qplib_chip_ctx *cctx; + struct bnxt_fw_msg fw_msg = {}; + int rc; + + cctx = rdev->chip_ctx; + bnxt_re_init_hwrm_hdr((void *)&req, HWRM_FUNC_DBR_PACING_QCFG); + bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp, + sizeof(resp), DFLT_HWRM_CMD_TIMEOUT); + rc = bnxt_send_msg(en_dev, &fw_msg); + if (rc) + return rc; + + if ((le32_to_cpu(resp.dbr_stat_db_fifo_reg) & + FUNC_DBR_PACING_QCFG_RESP_DBR_STAT_DB_FIFO_REG_ADDR_SPACE_MASK) == + FUNC_DBR_PACING_QCFG_RESP_DBR_STAT_DB_FIFO_REG_ADDR_SPACE_GRC) + cctx->dbr_stat_db_fifo = + le32_to_cpu(resp.dbr_stat_db_fifo_reg) & + ~FUNC_DBR_PACING_QCFG_RESP_DBR_STAT_DB_FIFO_REG_ADDR_SPACE_MASK; + return 0; +} + +/* Update the pacing tunable parameters to the default values */ +static void bnxt_re_set_default_pacing_data(struct bnxt_re_dev *rdev) +{ + struct bnxt_qplib_db_pacing_data *pacing_data = rdev->qplib_res.pacing_data; + + pacing_data->do_pacing = rdev->pacing.dbr_def_do_pacing; + pacing_data->pacing_th = rdev->pacing.pacing_algo_th; + pacing_data->alarm_th = + pacing_data->pacing_th * BNXT_RE_PACING_ALARM_TH_MULTIPLE; +} + +static int bnxt_re_initialize_dbr_pacing(struct bnxt_re_dev *rdev) +{ + if (bnxt_re_hwrm_dbr_pacing_qcfg(rdev)) + return -EIO; + + /* Allocate a page for app use */ + rdev->pacing.dbr_page = (void *)__get_free_page(GFP_KERNEL); + if (!rdev->pacing.dbr_page) + return -ENOMEM; + + memset((u8 *)rdev->pacing.dbr_page, 0, PAGE_SIZE); + rdev->qplib_res.pacing_data = (struct bnxt_qplib_db_pacing_data *)rdev->pacing.dbr_page; + + /* MAP HW window 2 for reading db fifo depth */ + writel(rdev->chip_ctx->dbr_stat_db_fifo & BNXT_GRC_BASE_MASK, + rdev->en_dev->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT + 4); + rdev->pacing.dbr_db_fifo_reg_off = + (rdev->chip_ctx->dbr_stat_db_fifo & BNXT_GRC_OFFSET_MASK) + + BNXT_RE_GRC_FIFO_REG_BASE; + rdev->pacing.dbr_bar_addr = + pci_resource_start(rdev->qplib_res.pdev, 0) + rdev->pacing.dbr_db_fifo_reg_off; + + rdev->pacing.pacing_algo_th = BNXT_RE_PACING_ALGO_THRESHOLD; + rdev->pacing.dbq_pacing_time = BNXT_RE_DBR_PACING_TIME; + rdev->pacing.dbr_def_do_pacing = BNXT_RE_DBR_DO_PACING_NO_CONGESTION; + rdev->pacing.do_pacing_save = rdev->pacing.dbr_def_do_pacing; + rdev->qplib_res.pacing_data->fifo_max_depth = BNXT_RE_MAX_FIFO_DEPTH; + rdev->qplib_res.pacing_data->fifo_room_mask = BNXT_RE_DB_FIFO_ROOM_MASK; + rdev->qplib_res.pacing_data->fifo_room_shift = BNXT_RE_DB_FIFO_ROOM_SHIFT; + rdev->qplib_res.pacing_data->grc_reg_offset = rdev->pacing.dbr_db_fifo_reg_off; + bnxt_re_set_default_pacing_data(rdev); + return 0; +} + +static void bnxt_re_deinitialize_dbr_pacing(struct bnxt_re_dev *rdev) +{ + if (rdev->pacing.dbr_page) + free_page((u64)rdev->pacing.dbr_page); + + rdev->pacing.dbr_page = NULL; + rdev->pacing.dbr_pacing = false; +} + static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, u16 fw_ring_id, int type) { @@ -1217,6 +1300,9 @@ static void bnxt_re_dev_uninit(struct bnxt_re_dev *rdev) if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) rdev->num_msix = 0; + if (rdev->pacing.dbr_pacing) + bnxt_re_deinitialize_dbr_pacing(rdev); + bnxt_re_destroy_chip_ctx(rdev); if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) bnxt_unregister_dev(rdev->en_dev); @@ -1309,6 +1395,16 @@ static int bnxt_re_dev_init(struct bnxt_re_dev *rdev, u8 wqe_mode) goto free_ring; } + if (bnxt_qplib_dbr_pacing_en(rdev->chip_ctx)) { + rc = bnxt_re_initialize_dbr_pacing(rdev); + if (!rc) { + rdev->pacing.dbr_pacing = true; + } else { + ibdev_err(&rdev->ibdev, + "DBR pacing disabled with error : %d\n", rc); + rdev->pacing.dbr_pacing = false; + } + } rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr, rdev->is_virtfn); if (rc) diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.h b/drivers/infiniband/hw/bnxt_re/qplib_res.h index d850a55..57161d3 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_res.h +++ b/drivers/infiniband/hw/bnxt_re/qplib_res.h @@ -48,6 +48,7 @@ extern const struct bnxt_qplib_gid bnxt_qplib_gid_zero; struct bnxt_qplib_drv_modes { u8 wqe_mode; bool db_push; + bool dbr_pacing; }; struct bnxt_qplib_chip_ctx { @@ -58,6 +59,17 @@ struct bnxt_qplib_chip_ctx { u16 hwrm_cmd_max_timeout; struct bnxt_qplib_drv_modes modes; u64 hwrm_intf_ver; + u32 dbr_stat_db_fifo; +}; + +struct bnxt_qplib_db_pacing_data { + u32 do_pacing; + u32 pacing_th; + u32 alarm_th; + u32 fifo_max_depth; + u32 fifo_room_mask; + u32 fifo_room_shift; + u32 grc_reg_offset; }; #define BNXT_QPLIB_DBR_PF_DB_OFFSET 0x10000 @@ -271,6 +283,7 @@ struct bnxt_qplib_res { struct mutex dpi_tbl_lock; bool prio; bool is_vf; + struct bnxt_qplib_db_pacing_data *pacing_data; }; static inline bool bnxt_qplib_is_chip_gen_p5(struct bnxt_qplib_chip_ctx *cctx) @@ -467,4 +480,10 @@ static inline bool _is_ext_stats_supported(u16 dev_cap_flags) return dev_cap_flags & CREQ_QUERY_FUNC_RESP_SB_EXT_STATS; } + +static inline u8 bnxt_qplib_dbr_pacing_en(struct bnxt_qplib_chip_ctx *cctx) +{ + return cctx->modes.dbr_pacing; +} + #endif /* __BNXT_QPLIB_RES_H__ */ -- 2.5.5 --000000000000effefe0600a89bda Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQfAYJKoZIhvcNAQcCoIIQbTCCEGkCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3TMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT 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