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 8AF5DC4332F for ; Wed, 9 Nov 2022 18:43:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231368AbiKISm6 (ORCPT ); Wed, 9 Nov 2022 13:42:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32962 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231322AbiKISm5 (ORCPT ); Wed, 9 Nov 2022 13:42:57 -0500 Received: from mail-qt1-x832.google.com (mail-qt1-x832.google.com [IPv6:2607:f8b0:4864:20::832]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF9E215719 for ; Wed, 9 Nov 2022 10:42:55 -0800 (PST) Received: by mail-qt1-x832.google.com with SMTP id h24so697945qta.9 for ; Wed, 09 Nov 2022 10:42:55 -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=wTN7/n372jygDapE+vjZbbosOGFxdFxe/a9mwGCnDe0=; b=CXTvxHV8o1lMhc+xAuxlagFN7Blp+IJoWpl1+1LgqebXaTB6Ma0gJPtv16AbEg6bo8 AR/+FCrEFnNqq7jxHXt9jKz2XtFFnDR4dPCLMkq4/12Qxj6o8DjPZjkW076DpwmnXSzC jg9NKdv1p0vd1E31l430Mod/LGo/RijyWXLPc= 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=wTN7/n372jygDapE+vjZbbosOGFxdFxe/a9mwGCnDe0=; b=Yqqs+rHrxV6dOFScuN7+rb8bM7yHAnTRRfAqI8obYAFXzo8LBC8Qcj8KSJ64gbpyD/ 4k/xbHJzbn1qbS8w2PYPaqTBX9aJ2gV0dOxRO/WgQUo+ejXX314VYeXxCVb1k3i9633R qHY54rmhCrguuZ2oHHhw256a+400nJe+7V5o1sZywOM0iztNzI4N0N8mkdzMUb+B/0kr Ag8D+KrI9etFJv8+u1elOoJ6vHeS2n6jNiQm7YT85Ny3VXZIAo+FJ36uA4ISF8bD6+JK tw2mgXwqbghpuFwDRvTzHuaB+4FyWCfG0UNvq05IrfnCgCOfwu/jwT8sTBL42QeD4zx8 CWdg== X-Gm-Message-State: ACrzQf1HZvQqbeYDV2YGojeEo/BLkkXPkuqMiS/cr7AQOxjEep74sZDE hausgXd9w8Lg7exgFTXDrLTatw== X-Google-Smtp-Source: AMsMyM76yj3TUYzeqwWgnqPnMAxasTK1UpdObZ9Ec8uFzGzkan00Tjb84gLbTt/XfTpQRBqvqJPbiw== X-Received: by 2002:ac8:6c9:0:b0:3a5:4109:b6a6 with SMTP id j9-20020ac806c9000000b003a54109b6a6mr33746028qth.648.1668019374967; Wed, 09 Nov 2022 10:42:54 -0800 (PST) Received: from C02GC2QQMD6T.wifi.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id u17-20020a05622a011100b003a598fcddefsm4795108qtw.87.2022.11.09.10.42.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Nov 2022 10:42:54 -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 Subject: [PATCH v4 1/6] bnxt_en: Add auxiliary driver support Date: Wed, 9 Nov 2022 10:42:39 -0800 Message-Id: <20221109184244.7032-2-ajit.khaparde@broadcom.com> X-Mailer: git-send-email 2.37.1 (Apple Git-137.1) In-Reply-To: <20221109184244.7032-1-ajit.khaparde@broadcom.com> References: <20221109184244.7032-1-ajit.khaparde@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000005858c205ed0e0629" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org --0000000000005858c205ed0e0629 Content-Transfer-Encoding: 8bit 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 --- 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/ethernet/broadcom/bnxt/bnxt.c index d9ad325f7840..16265d177639 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -13145,6 +13145,9 @@ 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->aux_dev); + bnxt_aux_dev_free(bp); + if (BNXT_PF(bp)) bnxt_sriov_disable(bp); @@ -13738,11 +13741,13 @@ 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: @@ -13786,7 +13791,6 @@ 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 7611bed4a196..222e1024ffde 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 +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)) + struct bnxt_aux_dev *aux_dev; 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..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" +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 = edev->net; struct bnxt *bp = netdev_priv(dev); struct bnxt_ulp *ulp; + int rc = 0; - ASSERT_RTNL(); if (ulp_id >= BNXT_MAX_ULP) return -EINVAL; ulp = &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 = -EBUSY; + goto exit; } if (ulp_id == BNXT_ROCE_ULP) { unsigned int max_stat_ctxs; max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp); if (max_stat_ctxs <= BNXT_MIN_ROCE_STAT_CTXS || - bp->cp_nr_rings == max_stat_ctxs) - return -ENOMEM; + bp->cp_nr_rings == max_stat_ctxs) { + rc = -ENOMEM; + goto exit; + } } - atomic_set(&ulp->ref_count, 0); + atomic_set(&ulp->ref_count, 1); ulp->handle = handle; rcu_assign_pointer(ulp->ulp_ops, ulp_ops); @@ -59,7 +64,8 @@ static int bnxt_register_dev(struct bnxt_en_dev *edev, unsigned int ulp_id, bnxt_hwrm_vnic_cfg(bp, 0); } - return 0; +exit: + return rc; } 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 = 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 +133,6 @@ 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; @@ -149,6 +155,7 @@ 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; @@ -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 = bnxt_open_nic(bp, true, false); + rtnl_unlock(); } else { rc = 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 = edev->net; struct bnxt *bp = netdev_priv(dev); - ASSERT_RTNL(); if (ulp_id != BNXT_ROCE_ULP) return -EINVAL; @@ -194,9 +202,12 @@ 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; 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; } @@ -347,25 +358,6 @@ 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 +467,135 @@ static const struct bnxt_en_ops bnxt_en_ops_tbl = { .bnxt_register_fw_async_events = bnxt_register_async_events, }; +void bnxt_aux_dev_free(struct bnxt *bp) +{ + kfree(bp->aux_dev); + bp->aux_dev = NULL; +} + +static struct bnxt_aux_dev *bnxt_aux_dev_alloc(struct bnxt *bp) +{ + struct bnxt_aux_dev *bnxt_adev; + + bnxt_adev = 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 = &bnxt_adev->aux_dev; + auxiliary_device_delete(adev); + auxiliary_device_uninit(adev); + if (bnxt_adev->id >= 0) + ida_free(&bnxt_aux_dev_ids, bnxt_adev->id); +} + +void bnxt_rdma_aux_device_init(struct bnxt *bp) +{ + struct net_device *dev = bp->dev; + int rc; + + if (bp->flags & BNXT_FLAG_ROCE_CAP) { + bp->aux_dev = 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 = 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 = 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 = + container_of(dev, struct bnxt_aux_dev, aux_dev.dev); + struct bnxt *bp = netdev_priv(bnxt_adev->edev->net); + + bnxt_adev->edev->en_ops = NULL; + kfree(bnxt_adev->edev); + bnxt_adev->edev = NULL; + bp->edev = NULL; +} + +static inline 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; +} + +int bnxt_rdma_aux_device_add(struct bnxt *bp) +{ + struct bnxt_aux_dev *bnxt_adev = bp->aux_dev; + struct bnxt_en_dev *edev = bnxt_adev->edev; + struct auxiliary_device *aux_dev; + int ret; + + aux_dev = &bnxt_adev->aux_dev; + aux_dev->id = bnxt_adev->id; + aux_dev->name = "rdma"; + aux_dev->dev.parent = &bp->pdev->dev; + aux_dev->dev.release = bnxt_aux_dev_release; + + if (!edev) { + edev = kzalloc(sizeof(*edev), GFP_KERNEL); + if (!edev) + return -ENOMEM; + } + + bnxt_set_edev_info(edev, bp); + bnxt_adev->edev = edev; + bp->edev = edev; + + ret = auxiliary_device_init(aux_dev); + if (ret) { + kfree(edev); + kfree(bnxt_adev); + return ret; + } + + ret = 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 = 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..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 struct hwrm_async_event_cmpl; +struct bnxt_aux_dev; struct bnxt; 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); #endif -- 2.37.1 (Apple Git-137.1) --0000000000005858c205ed0e0629 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQdgYJKoZIhvcNAQcCoIIQZzCCEGMCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3NMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS 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