From nobody Thu Apr 9 12:31:29 2026 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 3B2A8C43219 for ; Fri, 4 Nov 2022 16:28:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230487AbiKDQ2B (ORCPT ); Fri, 4 Nov 2022 12:28:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53836 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230508AbiKDQ1r (ORCPT ); Fri, 4 Nov 2022 12:27:47 -0400 Received: from mail-qv1-xf35.google.com (mail-qv1-xf35.google.com [IPv6:2607:f8b0:4864:20::f35]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0EA04731F for ; Fri, 4 Nov 2022 09:27:45 -0700 (PDT) Received: by mail-qv1-xf35.google.com with SMTP id j6so3509050qvn.12 for ; Fri, 04 Nov 2022 09:27:45 -0700 (PDT) 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=Y1Z1P1pDBb2+LZCzW/Bi2EtBA3AuPzBXMxd4YPHoUEk=; b=GcjwwZHAw5Vhknbove+EUnn3OEVgVZnn9BTlsC1lhoQQtD3RDCKRL3hH45q66sphHZ EI5GU0QffZ2CsOnQb+c3hvf2DADb+8F4+TQSFqVVfW3SdwzL4LMb8/l8aF7sjHBT2cwI jl49ctYBe1zt4PdFCF8RnSlRCZ3+rOAUxTT84= 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=Y1Z1P1pDBb2+LZCzW/Bi2EtBA3AuPzBXMxd4YPHoUEk=; b=QPMV4XNoSr/OKoknLtUT+w4ruk7gPhuyW9wxjTu+mnjP3PyBasqYT1lFweydClam8x ADXyGlAQlNfcUlo6jBWZKorYk4s+E2+eyL/nexgOcDzcZjsMQ2+MJniSHZfpNBUWHItS slKSGswv3wZN6EpZcwu8gQW+waxeeAK5Deoq3zoN8lFLC0fFH78P1RKVXDVBAJMxRdwh UWj44OBuE9biFr3YqLjqCtdkFsMQq+TvpFGgDw7Plmb1q+YjfblBxLtx7UTGq414OEZK kwe+KMfVfHe7WUI9MEjlxCp1UKJDZoONkpNF5amyLcTBu0RWWFur8/ap+rqy5awNmBvX fe2A== X-Gm-Message-State: ACrzQf1tTq2Am7gwbZ0he3+QEEDD3q/7/U7u5OFaXiR8BvFAErD4hTTv K0GGsiUxb4SjTQ6UAsPAdWF7Pg== X-Google-Smtp-Source: AMsMyM4E9Ca7UhIwLOUdPdABW+gs5St+eoXYEWmGIvO/3RmxKwDc7KyyjBHBV0ShG4xWmyX8cy/ShQ== X-Received: by 2002:a05:6214:dab:b0:4bb:b0d2:da37 with SMTP id h11-20020a0562140dab00b004bbb0d2da37mr32149770qvh.24.1667579264882; Fri, 04 Nov 2022 09:27:44 -0700 (PDT) Received: from C02GC2QQMD6T.wifi.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id x17-20020a05620a449100b006fa31bf2f3dsm3290395qkp.47.2022.11.04.09.27.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Nov 2022 09:27:43 -0700 (PDT) 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 Subject: [PATCH v3 1/6] bnxt_en: Add auxiliary driver support Date: Fri, 4 Nov 2022 09:27:28 -0700 Message-Id: <20221104162733.73345-2-ajit.khaparde@broadcom.com> X-Mailer: git-send-email 2.37.1 (Apple Git-137.1) In-Reply-To: <20221104162733.73345-1-ajit.khaparde@broadcom.com> References: <20221104162733.73345-1-ajit.khaparde@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000bde42405eca78dc6" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000bde42405eca78dc6 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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 --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 +- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 8 + drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c | 177 +++++++++++++++--- drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h | 7 +- 4 files changed, 169 insertions(+), 31 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethern= et/broadcom/bnxt/bnxt.c index 04cf7684f1b0..3cbedbecf3b3 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -13119,6 +13119,9 @@ static void bnxt_remove_one(struct pci_dev *pdev) struct net_device *dev =3D pci_get_drvdata(pdev); struct bnxt *bp =3D netdev_priv(dev); =20 + bnxt_rdma_aux_device_uninit(bp->aux_dev); + bnxt_aux_dev_free(bp); + if (BNXT_PF(bp)) bnxt_sriov_disable(bp); =20 @@ -13716,11 +13719,13 @@ static int bnxt_init_one(struct pci_dev *pdev, co= nst struct pci_device_id *ent) devlink_port_type_eth_set(&bp->dl_port, bp->dev); bnxt_dl_fw_reporters_create(bp); =20 + bnxt_rdma_aux_device_init(bp); + bnxt_print_device_info(bp); =20 pci_save_state(pdev); - return 0; =20 + return 0; init_err_cleanup: bnxt_dl_unregister(bp); init_err_dl: @@ -13764,7 +13769,6 @@ static void bnxt_shutdown(struct pci_dev *pdev) if (netif_running(dev)) dev_close(dev); =20 - bnxt_ulp_shutdown(bp); bnxt_clear_int_mode(bp); pci_disable_device(pdev); =20 diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethern= et/broadcom/bnxt/bnxt.h index 91a1ba0a914d..284e39d5ae49 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 @@ -1622,6 +1623,12 @@ struct bnxt_fw_health { #define BNXT_FW_RETRY 5 #define BNXT_FW_IF_RETRY 10 =20 +struct bnxt_aux_dev { + struct auxiliary_device aux_dev; + struct bnxt_en_dev *edev; + int id; +}; + enum board_idx { BCM57301, BCM57302, @@ -1843,6 +1850,7 @@ struct bnxt { #define BNXT_CHIP_P4_PLUS(bp) \ (BNXT_CHIP_P4(bp) || BNXT_CHIP_P5(bp)) =20 + struct bnxt_aux_dev *aux_dev; struct bnxt_en_dev *edev; =20 struct bnxt_napi **bnapi; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/et= hernet/broadcom/bnxt/bnxt_ulp.c index 2e54bf4fc7a7..7ffd61ec2683 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c @@ -25,32 +25,37 @@ #include "bnxt_hwrm.h" #include "bnxt_ulp.h" =20 +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) { struct net_device *dev =3D edev->net; struct bnxt *bp =3D netdev_priv(dev); struct bnxt_ulp *ulp; + int rc =3D 0; =20 - ASSERT_RTNL(); if (ulp_id >=3D BNXT_MAX_ULP) return -EINVAL; =20 ulp =3D &edev->ulp_tbl[ulp_id]; if (rcu_access_pointer(ulp->ulp_ops)) { netdev_err(bp->dev, "ulp id %d already registered\n", ulp_id); - return -EBUSY; + rc =3D -EBUSY; + goto exit; } if (ulp_id =3D=3D BNXT_ROCE_ULP) { unsigned int max_stat_ctxs; =20 max_stat_ctxs =3D bnxt_get_max_func_stat_ctxs(bp); if (max_stat_ctxs <=3D BNXT_MIN_ROCE_STAT_CTXS || - bp->cp_nr_rings =3D=3D max_stat_ctxs) - return -ENOMEM; + bp->cp_nr_rings =3D=3D max_stat_ctxs) { + rc =3D -ENOMEM; + goto exit; + } } =20 - atomic_set(&ulp->ref_count, 0); + atomic_set(&ulp->ref_count, 1); ulp->handle =3D handle; rcu_assign_pointer(ulp->ulp_ops, ulp_ops); =20 @@ -59,7 +64,8 @@ static int bnxt_register_dev(struct bnxt_en_dev *edev, un= signed int ulp_id, bnxt_hwrm_vnic_cfg(bp, 0); } =20 - return 0; +exit: + return rc; } =20 static int bnxt_unregister_dev(struct bnxt_en_dev *edev, unsigned int ulp_= id) @@ -69,10 +75,11 @@ static int bnxt_unregister_dev(struct bnxt_en_dev *edev= , unsigned int ulp_id) struct bnxt_ulp *ulp; int i =3D 0; =20 - ASSERT_RTNL(); if (ulp_id >=3D BNXT_MAX_ULP) return -EINVAL; =20 + edev->flags |=3D BNXT_EN_FLAG_ULP_STOPPED; + ulp =3D &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 +133,6 @@ static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev,= unsigned int ulp_id, int total_vecs; int rc =3D 0; =20 - ASSERT_RTNL(); if (ulp_id !=3D BNXT_ROCE_ULP) return -EINVAL; =20 @@ -149,6 +155,7 @@ static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev,= unsigned int ulp_id, max_idx =3D min_t(int, bp->total_irqs, max_cp_rings); idx =3D max_idx - avail_msix; } + edev->ulp_tbl[ulp_id].msix_base =3D idx; edev->ulp_tbl[ulp_id].msix_requested =3D avail_msix; hw_resc =3D &bp->hw_resc; @@ -156,8 +163,10 @@ static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev= , unsigned int ulp_id, if (bp->total_irqs < total_vecs || (BNXT_NEW_RM(bp) && hw_resc->resv_irqs < total_vecs)) { if (netif_running(dev)) { + rtnl_lock(); bnxt_close_nic(bp, true, false); rc =3D bnxt_open_nic(bp, true, false); + rtnl_unlock(); } else { rc =3D bnxt_reserve_rings(bp, true); } @@ -184,7 +193,6 @@ static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev= , unsigned int ulp_id) struct net_device *dev =3D edev->net; struct bnxt *bp =3D netdev_priv(dev); =20 - ASSERT_RTNL(); if (ulp_id !=3D BNXT_ROCE_ULP) return -EINVAL; =20 @@ -194,9 +202,12 @@ static int bnxt_free_msix_vecs(struct bnxt_en_dev *ede= v, unsigned int ulp_id) edev->ulp_tbl[ulp_id].msix_requested =3D 0; edev->flags &=3D ~BNXT_EN_FLAG_MSIX_REQUESTED; if (netif_running(dev) && !(edev->flags & BNXT_EN_FLAG_ULP_STOPPED)) { + rtnl_lock(); bnxt_close_nic(bp, true, false); bnxt_open_nic(bp, true, false); + rtnl_unlock(); } + return 0; } =20 @@ -347,25 +358,6 @@ void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs) } } =20 -void bnxt_ulp_shutdown(struct bnxt *bp) -{ - struct bnxt_en_dev *edev =3D bp->edev; - struct bnxt_ulp_ops *ops; - int i; - - if (!edev) - return; - - for (i =3D 0; i < BNXT_MAX_ULP; i++) { - struct bnxt_ulp *ulp =3D &edev->ulp_tbl[i]; - - ops =3D 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 =3D bp->edev; @@ -475,6 +467,135 @@ static const struct bnxt_en_ops bnxt_en_ops_tbl =3D { .bnxt_register_fw_async_events =3D bnxt_register_async_events, }; =20 +void bnxt_aux_dev_free(struct bnxt *bp) +{ + kfree(bp->aux_dev); + bp->aux_dev =3D NULL; +} + +static struct bnxt_aux_dev *bnxt_aux_dev_alloc(struct bnxt *bp) +{ + struct bnxt_aux_dev *bnxt_adev; + + bnxt_adev =3D kzalloc(sizeof(*bnxt_adev), GFP_KERNEL); + if (!bnxt_adev) + return ERR_PTR(-ENOMEM); + + return bnxt_adev; +} + +void bnxt_rdma_aux_device_uninit(struct bnxt_aux_dev *bnxt_adev) +{ + struct auxiliary_device *adev; + + if (IS_ERR_OR_NULL(bnxt_adev)) + return; + + adev =3D &bnxt_adev->aux_dev; + auxiliary_device_delete(adev); + auxiliary_device_uninit(adev); + if (bnxt_adev->id >=3D 0) + ida_free(&bnxt_aux_dev_ids, bnxt_adev->id); +} + +void bnxt_rdma_aux_device_init(struct bnxt *bp) +{ + struct net_device *dev =3D bp->dev; + int rc; + + if (bp->flags & BNXT_FLAG_ROCE_CAP) { + bp->aux_dev =3D bnxt_aux_dev_alloc(bp); + if (IS_ERR_OR_NULL(bp->aux_dev)) { + netdev_warn(dev, "Failed to init auxiliary device for ROCE\n"); + goto skip_aux_init; + } + + bp->aux_dev->id =3D ida_alloc(&bnxt_aux_dev_ids, GFP_KERNEL); + if (bp->aux_dev->id < 0) { + netdev_warn(dev, "ida alloc failed for ROCE auxiliary device\n"); + bnxt_aux_dev_free(bp); + goto skip_aux_init; + } + + /* If aux bus init fails, continue with netdev init. */ + rc =3D bnxt_rdma_aux_device_add(bp); + if (rc) { + netdev_warn(dev, "Failed to add auxiliary device for ROCE\n"); + ida_free(&bnxt_aux_dev_ids, bp->aux_dev->id); + bnxt_aux_dev_free(bp); + } + } +skip_aux_init: + return; +} + +void bnxt_aux_dev_release(struct device *dev) +{ + struct bnxt_aux_dev *bnxt_adev =3D + container_of(dev, struct bnxt_aux_dev, aux_dev.dev); + struct bnxt *bp =3D netdev_priv(bnxt_adev->edev->net); + + bnxt_adev->edev->en_ops =3D NULL; + kfree(bnxt_adev->edev); + bnxt_adev->edev =3D NULL; + bp->edev =3D NULL; +} + +static inline void bnxt_set_edev_info(struct bnxt_en_dev *edev, struct bnx= t *bp) +{ + edev->en_ops =3D &bnxt_en_ops_tbl; + edev->net =3D bp->dev; + edev->pdev =3D bp->pdev; + edev->l2_db_size =3D bp->db_size; + edev->l2_db_size_nc =3D bp->db_size; + + if (bp->flags & BNXT_FLAG_ROCEV1_CAP) + edev->flags |=3D BNXT_EN_FLAG_ROCEV1_CAP; + if (bp->flags & BNXT_FLAG_ROCEV2_CAP) + edev->flags |=3D BNXT_EN_FLAG_ROCEV2_CAP; +} + +int bnxt_rdma_aux_device_add(struct bnxt *bp) +{ + struct bnxt_aux_dev *bnxt_adev =3D bp->aux_dev; + struct bnxt_en_dev *edev =3D bnxt_adev->edev; + struct auxiliary_device *aux_dev; + int ret; + + aux_dev =3D &bnxt_adev->aux_dev; + aux_dev->id =3D bnxt_adev->id; + aux_dev->name =3D "rdma"; + aux_dev->dev.parent =3D &bp->pdev->dev; + aux_dev->dev.release =3D bnxt_aux_dev_release; + + if (!edev) { + edev =3D kzalloc(sizeof(*edev), GFP_KERNEL); + if (!edev) + return -ENOMEM; + } + + bnxt_set_edev_info(edev, bp); + bnxt_adev->edev =3D edev; + bp->edev =3D edev; + + ret =3D auxiliary_device_init(aux_dev); + if (ret) { + kfree(edev); + kfree(bnxt_adev); + return ret; + } + + ret =3D auxiliary_device_add(aux_dev); + if (ret) { + kfree(edev); + kfree(bnxt_adev); + auxiliary_device_uninit(aux_dev); + return ret; + } + + return 0; +} + struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev) { struct bnxt *bp =3D netdev_priv(dev); diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h b/drivers/net/et= hernet/broadcom/bnxt/bnxt_ulp.h index 42b50abc3e91..8b85c663d881 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h @@ -17,6 +17,7 @@ #define BNXT_MIN_ROCE_STAT_CTXS 1 =20 struct hwrm_async_event_cmpl; +struct bnxt_aux_dev; struct bnxt; =20 struct bnxt_msix_entry { @@ -102,10 +103,14 @@ 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_aux_dev_release(struct device *dev); +int bnxt_rdma_aux_device_add(struct bnxt *bp); +void bnxt_rdma_aux_device_uninit(struct bnxt_aux_dev *bnxt_adev); +void bnxt_rdma_aux_device_init(struct bnxt *bp); +void bnxt_aux_dev_free(struct bnxt *bp); struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev); =20 #endif --=20 2.37.1 (Apple Git-137.1) --000000000000bde42405eca78dc6 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature 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