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[2620:137:e000::1:20]) by mx.google.com with ESMTP id fy5-20020a1709069f0500b00870d2ca67absi9673852ejc.218.2023.01.19.22.22.08; Thu, 19 Jan 2023 22:22:31 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@broadcom.com header.s=google header.b=QQSf31yF; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=broadcom.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229875AbjATGUx (ORCPT + 99 others); Fri, 20 Jan 2023 01:20:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229854AbjATGUr (ORCPT ); Fri, 20 Jan 2023 01:20:47 -0500 Received: from mail-qt1-x835.google.com (mail-qt1-x835.google.com [IPv6:2607:f8b0:4864:20::835]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E84E282991 for ; Thu, 19 Jan 2023 22:20:42 -0800 (PST) Received: by mail-qt1-x835.google.com with SMTP id d16so3456220qtw.8 for ; Thu, 19 Jan 2023 22:20:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=bQ9x7w/p239C8v7Z4ev1VfbsujY9SkXylWPQCqBkcQ8=; b=QQSf31yFrcI/u0UGaGS/PSkXRi/vaLYn/Fwfa91eyo4+RMlXiZ85falEtt9SUSd9En KHLbggR7cXMegOfsMv6hUeh/QpuLb51ENnHgo/I5GDGey6WjExLd3HOpK7IiaBjet6tl RktDYFzeTm3LtKTuy5EsJxHsrMP+PM79ICREE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=mime-version: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=bQ9x7w/p239C8v7Z4ev1VfbsujY9SkXylWPQCqBkcQ8=; b=aTt8omnp3S4Y9ji8bRyarzT81vcgtZXRrFAyM/PduKfOrH0qvElG9+ZwEuyUnNQiZs FgZueeqbL1smUaCAC80pN+oHgKjLvc5A0H/3xR2D94jMExpnOL0aaqxqZvzcT1NTa8o0 HUbCM8+xMvMKQI+K65ckZKIr7+Pf0Gw3zb2LQQUVgNFjK3p5J/91zxNBz1CxkKxqNaXf Z6G6vXQvPhxusR6Xyh2qdwFndY22hHQEk1/F44Ko/D0QPNOtO/bZ2+NKij1QJmiFLEYz kwZfRSe/XeKwdv+qKf2KKLy+VJ/HL6JEZXwbuT/YpojE42cKYH5PyCtXULeuWbcdTwp8 e2Ww== X-Gm-Message-State: AFqh2kqKkfg12Q8b0pbK3deqi/NWB5l0Qk9/xH4h4NX/P+meCsIk5n7+ jzed8kpv9kJvl2zwlvTJL6XWtQ== X-Received: by 2002:ac8:4e0d:0:b0:3b6:3b9e:f0fd with SMTP id c13-20020ac84e0d000000b003b63b9ef0fdmr18235230qtw.26.1674195641864; Thu, 19 Jan 2023 22:20:41 -0800 (PST) Received: from localhost.localdomain ([2605:a601:a780:1400:641c:466b:fa8e:b05a]) by smtp.gmail.com with ESMTPSA id e26-20020ac845da000000b003a527d29a41sm6903273qto.75.2023.01.19.22.20.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Jan 2023 22:20:41 -0800 (PST) From: Ajit Khaparde To: ajit.khaparde@broadcom.com Cc: andrew.gospodarek@broadcom.com, davem@davemloft.net, edumazet@google.com, jgg@ziepe.ca, kuba@kernel.org, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, michael.chan@broadcom.com, netdev@vger.kernel.org, pabeni@redhat.com, selvin.xavier@broadcom.com, Leon Romanovsky Subject: [PATCH net-next v8 1/8] bnxt_en: Add auxiliary driver support Date: Thu, 19 Jan 2023 22:05:28 -0800 Message-Id: <20230120060535.83087-2-ajit.khaparde@broadcom.com> X-Mailer: git-send-email 2.37.1 (Apple Git-137.1) In-Reply-To: <20230120060535.83087-1-ajit.khaparde@broadcom.com> References: <20230120060535.83087-1-ajit.khaparde@broadcom.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755521484791333287?= X-GMAIL-MSGID: =?utf-8?q?1755521484791333287?= Add auxiliary driver support. An auxiliary device will be created if the hardware indicates support for RDMA. The bnxt_ulp_probe() function has been removed and a new bnxt_rdma_aux_device_add() function has been added. The bnxt_free_msix_vecs() and bnxt_req_msix_vecs() will now hold the RTNL lock when they call the bnxt_close_nic()and bnxt_open_nic() since the device close and open need to be protected under RTNL lock. The operations between the bnxt_en and bnxt_re will be protected using the en_ops_lock. This will be used by the bnxt_re driver in a follow-on patch to create ROCE interfaces. Signed-off-by: Ajit Khaparde Reviewed-by: Andy Gospodarek Reviewed-by: Selvin Xavier Reviewed-by: Leon Romanovsky --- drivers/net/ethernet/broadcom/Kconfig | 1 + drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 +- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 8 + drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c | 161 +++++++++++++++--- drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h | 4 +- 5 files changed, 155 insertions(+), 27 deletions(-) diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig index f4ca0c6c0f51..948586bf1b5b 100644 --- a/drivers/net/ethernet/broadcom/Kconfig +++ b/drivers/net/ethernet/broadcom/Kconfig @@ -213,6 +213,7 @@ config BNXT select NET_DEVLINK select PAGE_POOL select DIMLIB + select AUXILIARY_BUS help This driver supports Broadcom NetXtreme-C/E 10/25/40/50 gigabit Ethernet cards. To compile this driver as a module, choose M here: diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 240a7e8a7652..bf3eaa2c0d06 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -13178,6 +13178,8 @@ static void bnxt_remove_one(struct pci_dev *pdev) struct net_device *dev = pci_get_drvdata(pdev); struct bnxt *bp = netdev_priv(dev); + bnxt_rdma_aux_device_uninit(bp); + if (BNXT_PF(bp)) bnxt_sriov_disable(bp); @@ -13212,6 +13214,7 @@ static void bnxt_remove_one(struct pci_dev *pdev) kfree(bp->rss_indir_tbl); bp->rss_indir_tbl = NULL; bnxt_free_port_stats(bp); + bnxt_aux_priv_free(bp); free_netdev(dev); } @@ -13776,11 +13779,13 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) bnxt_dl_fw_reporters_create(bp); + bnxt_rdma_aux_device_init(bp); + bnxt_print_device_info(bp); pci_save_state(pdev); - return 0; + return 0; init_err_cleanup: bnxt_dl_unregister(bp); init_err_dl: @@ -13824,7 +13829,6 @@ static void bnxt_shutdown(struct pci_dev *pdev) if (netif_running(dev)) dev_close(dev); - bnxt_ulp_shutdown(bp); bnxt_clear_int_mode(bp); pci_disable_device(pdev); diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 5163ef4a49ea..dcb09fbe4007 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -1631,6 +1632,12 @@ struct bnxt_fw_health { #define BNXT_FW_IF_RETRY 10 #define BNXT_FW_SLOT_RESET_RETRY 4 +struct bnxt_aux_priv { + struct auxiliary_device aux_dev; + struct bnxt_en_dev *edev; + int id; +}; + enum board_idx { BCM57301, BCM57302, @@ -1852,6 +1859,7 @@ struct bnxt { #define BNXT_CHIP_P4_PLUS(bp) \ (BNXT_CHIP_P4(bp) || BNXT_CHIP_P5(bp)) + struct bnxt_aux_priv *aux_priv; struct bnxt_en_dev *edev; struct bnxt_napi **bnapi; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c index 2e54bf4fc7a7..189a729f4634 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c @@ -25,6 +25,8 @@ #include "bnxt_hwrm.h" #include "bnxt_ulp.h" +static DEFINE_IDA(bnxt_aux_dev_ids); + static int bnxt_register_dev(struct bnxt_en_dev *edev, unsigned int ulp_id, struct bnxt_ulp_ops *ulp_ops, void *handle) { @@ -32,7 +34,6 @@ static int bnxt_register_dev(struct bnxt_en_dev *edev, unsigned int ulp_id, struct bnxt *bp = netdev_priv(dev); struct bnxt_ulp *ulp; - ASSERT_RTNL(); if (ulp_id >= BNXT_MAX_ULP) return -EINVAL; @@ -50,7 +51,7 @@ static int bnxt_register_dev(struct bnxt_en_dev *edev, unsigned int ulp_id, return -ENOMEM; } - atomic_set(&ulp->ref_count, 0); + atomic_set(&ulp->ref_count, 1); ulp->handle = handle; rcu_assign_pointer(ulp->ulp_ops, ulp_ops); @@ -69,10 +70,11 @@ static int bnxt_unregister_dev(struct bnxt_en_dev *edev, unsigned int ulp_id) struct bnxt_ulp *ulp; int i = 0; - ASSERT_RTNL(); if (ulp_id >= BNXT_MAX_ULP) return -EINVAL; + edev->flags |= BNXT_EN_FLAG_ULP_STOPPED; + ulp = &edev->ulp_tbl[ulp_id]; if (!rcu_access_pointer(ulp->ulp_ops)) { netdev_err(bp->dev, "ulp id %d not registered\n", ulp_id); @@ -126,7 +128,6 @@ static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, unsigned int ulp_id, int total_vecs; int rc = 0; - ASSERT_RTNL(); if (ulp_id != BNXT_ROCE_ULP) return -EINVAL; @@ -149,10 +150,12 @@ static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, unsigned int ulp_id, max_idx = min_t(int, bp->total_irqs, max_cp_rings); idx = max_idx - avail_msix; } + edev->ulp_tbl[ulp_id].msix_base = idx; edev->ulp_tbl[ulp_id].msix_requested = avail_msix; hw_resc = &bp->hw_resc; total_vecs = idx + avail_msix; + rtnl_lock(); if (bp->total_irqs < total_vecs || (BNXT_NEW_RM(bp) && hw_resc->resv_irqs < total_vecs)) { if (netif_running(dev)) { @@ -162,6 +165,7 @@ static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, unsigned int ulp_id, rc = bnxt_reserve_rings(bp, true); } } + rtnl_unlock(); if (rc) { edev->ulp_tbl[ulp_id].msix_requested = 0; return -EAGAIN; @@ -184,7 +188,6 @@ static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, unsigned int ulp_id) struct net_device *dev = edev->net; struct bnxt *bp = netdev_priv(dev); - ASSERT_RTNL(); if (ulp_id != BNXT_ROCE_ULP) return -EINVAL; @@ -193,10 +196,13 @@ static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, unsigned int ulp_id) edev->ulp_tbl[ulp_id].msix_requested = 0; edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED; + rtnl_lock(); if (netif_running(dev) && !(edev->flags & BNXT_EN_FLAG_ULP_STOPPED)) { bnxt_close_nic(bp, true, false); bnxt_open_nic(bp, true, false); } + rtnl_unlock(); + return 0; } @@ -347,25 +353,6 @@ void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs) } } -void bnxt_ulp_shutdown(struct bnxt *bp) -{ - struct bnxt_en_dev *edev = bp->edev; - struct bnxt_ulp_ops *ops; - int i; - - if (!edev) - return; - - for (i = 0; i < BNXT_MAX_ULP; i++) { - struct bnxt_ulp *ulp = &edev->ulp_tbl[i]; - - ops = rtnl_dereference(ulp->ulp_ops); - if (!ops || !ops->ulp_shutdown) - continue; - ops->ulp_shutdown(ulp->handle); - } -} - void bnxt_ulp_irq_stop(struct bnxt *bp) { struct bnxt_en_dev *edev = bp->edev; @@ -475,6 +462,132 @@ static const struct bnxt_en_ops bnxt_en_ops_tbl = { .bnxt_register_fw_async_events = bnxt_register_async_events, }; +void bnxt_aux_priv_free(struct bnxt *bp) +{ + kfree(bp->aux_priv); +} + +static struct bnxt_aux_priv *bnxt_aux_priv_alloc(struct bnxt *bp) +{ + return kzalloc(sizeof(struct bnxt_aux_priv), GFP_KERNEL); +} + +void bnxt_rdma_aux_device_uninit(struct bnxt *bp) +{ + struct bnxt_aux_priv *aux_priv; + struct auxiliary_device *adev; + + /* Skip if no auxiliary device init was done. */ + if (!(bp->flags & BNXT_FLAG_ROCE_CAP)) + return; + + aux_priv = bp->aux_priv; + adev = &aux_priv->aux_dev; + auxiliary_device_delete(adev); + auxiliary_device_uninit(adev); + ida_free(&bnxt_aux_dev_ids, aux_priv->id); +} + +static void bnxt_aux_dev_release(struct device *dev) +{ + struct bnxt_aux_priv *aux_priv = + container_of(dev, struct bnxt_aux_priv, aux_dev.dev); + struct bnxt *bp = netdev_priv(aux_priv->edev->net); + + aux_priv->edev->en_ops = NULL; + kfree(aux_priv->edev); + aux_priv->edev = NULL; + bp->edev = NULL; +} + +static void bnxt_set_edev_info(struct bnxt_en_dev *edev, struct bnxt *bp) +{ + edev->en_ops = &bnxt_en_ops_tbl; + edev->net = bp->dev; + edev->pdev = bp->pdev; + edev->l2_db_size = bp->db_size; + edev->l2_db_size_nc = bp->db_size; + + if (bp->flags & BNXT_FLAG_ROCEV1_CAP) + edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP; + if (bp->flags & BNXT_FLAG_ROCEV2_CAP) + edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP; +} + +static int bnxt_rdma_aux_device_add(struct bnxt *bp) +{ + struct bnxt_aux_priv *aux_priv = bp->aux_priv; + struct bnxt_en_dev *edev = aux_priv->edev; + struct auxiliary_device *aux_dev; + int ret; + + edev = kzalloc(sizeof(*edev), GFP_KERNEL); + if (!edev) + return -ENOMEM; + + aux_dev = &aux_priv->aux_dev; + aux_dev->id = aux_priv->id; + aux_dev->name = "rdma"; + aux_dev->dev.parent = &bp->pdev->dev; + aux_dev->dev.release = bnxt_aux_dev_release; + + aux_priv->edev = edev; + bp->edev = edev; + bnxt_set_edev_info(edev, bp); + + ret = auxiliary_device_init(aux_dev); + if (ret) + goto free_edev; + + ret = auxiliary_device_add(aux_dev); + if (ret) + goto aux_dev_uninit; + + return 0; +aux_dev_uninit: + auxiliary_device_uninit(aux_dev); +free_edev: + kfree(edev); + bp->edev = NULL; + + return ret; +} + +void bnxt_rdma_aux_device_init(struct bnxt *bp) +{ + int rc; + + if (!(bp->flags & BNXT_FLAG_ROCE_CAP)) + return; + + bp->aux_priv = bnxt_aux_priv_alloc(bp); + if (!bp->aux_priv) + goto skip_ida_init; + + bp->aux_priv->id = ida_alloc(&bnxt_aux_dev_ids, GFP_KERNEL); + if (bp->aux_priv->id < 0) { + netdev_warn(bp->dev, + "ida alloc failed for ROCE auxiliary device\n"); + goto skip_aux_init; + } + + /* If aux bus init fails, continue with netdev init. */ + rc = bnxt_rdma_aux_device_add(bp); + if (rc) { + netdev_warn(bp->dev, + "Failed to add auxiliary device for ROCE\n"); + goto aux_add_failed; + } + return; + +aux_add_failed: + ida_free(&bnxt_aux_dev_ids, bp->aux_priv->id); +skip_aux_init: + bnxt_aux_priv_free(bp); +skip_ida_init: + bp->flags &= ~BNXT_FLAG_ROCE_CAP; +} + struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev) { struct bnxt *bp = netdev_priv(dev); diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h index 42b50abc3e91..bdd684f2d639 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h @@ -102,10 +102,12 @@ int bnxt_get_ulp_stat_ctxs(struct bnxt *bp); void bnxt_ulp_stop(struct bnxt *bp); void bnxt_ulp_start(struct bnxt *bp, int err); void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs); -void bnxt_ulp_shutdown(struct bnxt *bp); void bnxt_ulp_irq_stop(struct bnxt *bp); void bnxt_ulp_irq_restart(struct bnxt *bp, int err); void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl); +void bnxt_rdma_aux_device_uninit(struct bnxt *bp); +void bnxt_rdma_aux_device_init(struct bnxt *bp); +void bnxt_aux_priv_free(struct bnxt *bp); struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev); #endif