From patchwork Fri May 19 14:42:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 13248432 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 D6DACC7EE2A for ; Fri, 19 May 2023 14:42:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232193AbjESOmt (ORCPT ); Fri, 19 May 2023 10:42:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232155AbjESOml (ORCPT ); Fri, 19 May 2023 10:42:41 -0400 Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F10BD1AC for ; Fri, 19 May 2023 07:42:36 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id d2e1a72fcca58-64384c6797eso2616007b3a.2 for ; Fri, 19 May 2023 07:42:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1684507356; x=1687099356; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=s7wJX7ZlC+ZSECooOl9HFjuRleTmjPyDTRWr5SltKsA=; b=nKzXVHe6vXhx7rUMNB1kNR7Ho7aHBVta+MBE76d7oASLkopJlB/QHtEjSdTkjOzd7g Pm+H2fED/Py77RrEnPZqELKDCkCAfxZoX0YhDPnIQea1C7nEPc/oMtEYj9V2vwdfNAxc NUFmEnKO4iNiA9eTKDiEZ1BPsB2dbeziEkQCQUf0vr1YSeGIY6HuetLk6/0ydBSCxWyd 5kVY2pJgUVn6O27dfQGRIYA+hjoZLZ53ZXxctU89EUbV6KiluJwanvcePe4nYTSz9xGX 9zo+/3nEAqy/VoXt9rJQb2fyQmz8lXzc0cczzgrIxEeDFrorHCXLfLk/KtRAuH/fr1Dy 0obw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684507356; x=1687099356; h=content-transfer-encoding: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=s7wJX7ZlC+ZSECooOl9HFjuRleTmjPyDTRWr5SltKsA=; b=Xo5mRVh5zzfRRKyhZISgfYu9QzkilEnmDHVNB8ky1OR3qDHQJoVKJUOIjzTgz1ktJj Smzc94yjO+9V7LZxrvlKaSEJvzHTLyx1puN7zuRyEvwn3ToC50NppDqv0GXg0e9Dqyw4 BUvT2AddGeLuR3T/kp0a+BUAUvT1eBm05epsYZ3vvdNwGSSpA2MNyoYX5F53L12YXUWO ioq9MwYeIAncWHZEH4dGG5Zvkzr+C+PQJelpuT+DBsL42S9ut3zFoyRV4Oy71k29XmEu R7OZB76uwUCkbAeQQAcrJUStJV38mxgh2u1kF2SR01N0KacxaxQCWCsQJYOPq11qOn9P N4uA== X-Gm-Message-State: AC+VfDx6W1asOvaV/1soytRpazIPcMYFaGhcsTgv9U9zmDw20f/UwDHo 38KEkxKaAKpi8U8lrqtCCar4 X-Google-Smtp-Source: ACHHUZ5TxT4TvFIDMfSlQpUHO0Brp9U3jl8ZkeffGS7KJ76dlQByjO1BiaQik0B6akQ6THS1ci34Lw== X-Received: by 2002:a05:6a00:2e98:b0:64d:3e99:83a5 with SMTP id fd24-20020a056a002e9800b0064d3e9983a5mr1311335pfb.26.1684507356403; Fri, 19 May 2023 07:42:36 -0700 (PDT) Received: from localhost.localdomain ([117.202.184.13]) by smtp.gmail.com with ESMTPSA id v11-20020aa7808b000000b005d22639b577sm3089611pff.165.2023.05.19.07.42.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 May 2023 07:42:35 -0700 (PDT) From: Manivannan Sadhasivam To: lpieralisi@kernel.org, kw@linux.com Cc: kishon@kernel.org, bhelgaas@google.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Manivannan Sadhasivam Subject: [PATCH v4 4/7] PCI: endpoint: Add BME notifier support Date: Fri, 19 May 2023 20:12:12 +0530 Message-Id: <20230519144215.25167-5-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230519144215.25167-1-manivannan.sadhasivam@linaro.org> References: <20230519144215.25167-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add support to notify the EPF device about the Bus Master Enable (BME) event received by the EPC device from the Root complex. Reviewed-by: Kishon Vijay Abraham I Signed-off-by: Manivannan Sadhasivam --- drivers/pci/endpoint/pci-epc-core.c | 26 ++++++++++++++++++++++++++ include/linux/pci-epc.h | 1 + include/linux/pci-epf.h | 2 ++ 3 files changed, 29 insertions(+) diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 1ecbe2b1d3bd..ca8f838fa51f 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -758,6 +758,32 @@ void pci_epc_init_notify(struct pci_epc *epc) } EXPORT_SYMBOL_GPL(pci_epc_init_notify); +/** + * pci_epc_bme_notify() - Notify the EPF device that the EPC device has received + * the BME event from the Root complex + * @epc: the EPC device that received the BME event + * + * Invoke to Notify the EPF device that the EPC device has received the Bus + * Master Enable (BME) event from the Root complex + */ +void pci_epc_bme_notify(struct pci_epc *epc) +{ + struct pci_epf *epf; + + if (!epc || IS_ERR(epc)) + return; + + mutex_lock(&epc->list_lock); + list_for_each_entry(epf, &epc->pci_epf, list) { + mutex_lock(&epf->lock); + if (epf->event_ops && epf->event_ops->bme) + epf->event_ops->bme(epf); + mutex_unlock(&epf->lock); + } + mutex_unlock(&epc->list_lock); +} +EXPORT_SYMBOL_GPL(pci_epc_bme_notify); + /** * pci_epc_destroy() - destroy the EPC device * @epc: the EPC device that has to be destroyed diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index 63a6cc5e5282..5cb694031072 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -205,6 +205,7 @@ int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf, void pci_epc_linkup(struct pci_epc *epc); void pci_epc_linkdown(struct pci_epc *epc); void pci_epc_init_notify(struct pci_epc *epc); +void pci_epc_bme_notify(struct pci_epc *epc); void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf, enum pci_epc_interface_type type); int pci_epc_write_header(struct pci_epc *epc, u8 func_no, u8 vfunc_no, diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index f8e5a63d0c83..f34b3b32a0e7 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -72,11 +72,13 @@ struct pci_epf_ops { * @core_init: Callback for the EPC initialization complete event * @link_up: Callback for the EPC link up event * @link_down: Callback for the EPC link down event + * @bme: Callback for the EPC BME (Bus Master Enable) event */ struct pci_epc_event_ops { int (*core_init)(struct pci_epf *epf); int (*link_up)(struct pci_epf *epf); int (*link_down)(struct pci_epf *epf); + int (*bme)(struct pci_epf *epf); }; /**