From patchwork Thu Jun 1 14:57:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 689424 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 7D9E2C7EE23 for ; Thu, 1 Jun 2023 14:58:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234646AbjFAO6Z (ORCPT ); Thu, 1 Jun 2023 10:58:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39878 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234648AbjFAO6J (ORCPT ); Thu, 1 Jun 2023 10:58:09 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 16771E6D for ; Thu, 1 Jun 2023 07:57:56 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id 41be03b00d2f7-53fb4ee9ba1so443147a12.3 for ; Thu, 01 Jun 2023 07:57:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1685631476; x=1688223476; 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=hYZvtGezswvgwNKpdFwjsrVB2tlNlkIcg9dibR8Jyd4=; b=j5mIwVNrkXB9e7PwH734RzlKBbt7G/OPSrTpfn+YG5/gW3gE8LQlxcexz/pWQkJDGW dd5UZgfyiqYh+j6mJ2q1oIfBlxZkbfA6S+rL1yrAyyye1r50ztVeDGyKcj5b7fg7yRUT ZBLlj2dF/dl8jtxHXJGUTfQyn5R/VrYw4UkdbHf+LEcgYNAfpIZkghccJJ4S4r7xPoTA 5nCft0CkjHflVSQjhaob+lnN/89X9SLro9rKDuDVJE82voOwD51IFzzNN2U2b0HvxYlY ecGsLyrNSONOkDcyPLJC39qPptYwA4nEuAcBIUAAC1XiOeOhV5K373fGmrp23FEkxYnO f3Nw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685631476; x=1688223476; 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=hYZvtGezswvgwNKpdFwjsrVB2tlNlkIcg9dibR8Jyd4=; b=BmRcLG7sAW0r10Epsmvtfbe+4RkgNgJKvkbozliORoRJyBdd6d2o7ggeDQ/zJoBIQk AfBA8bqSLKlgTIsuhF+nTk70oelbfVOjvtkxbB3yxt1ApTaE8D5XZ4VkWsxPKq4MeWvy MhdWUhxsRu/LsFzR9DK1rnE7GLoS5dP9JvGdRvoUT2RgHmH+SmuLVkl/F00MfGnGHQnW phs+FYflZqFA0kfGiRnnWq3dBTwipllK7EKiEEhqufB44k0VQZUxD2o2++KHJLP6nwfU ZaBeSC+0rc3aLHGHbnrmRUhNM54EmZoc48Saa+j8vZ4PZCtyAFx7uFnDW6bayboj7OOT 78uA== X-Gm-Message-State: AC+VfDzpsBAWD5R/SG3eQmQuGa9QmKty4tCakmh+YowgSrpdzu1u3pQR xcRXATdERTgjodLuCNebcmf4 X-Google-Smtp-Source: ACHHUZ58FyMJDryIcb5nwFxt0s7kS/5t3dBe6IT12VBCROlTmdztAu4R2HwmIgck1NU57nX9v2IETA== X-Received: by 2002:a17:902:7049:b0:1b0:34c6:3be2 with SMTP id h9-20020a170902704900b001b034c63be2mr6474782plt.1.1685631476098; Thu, 01 Jun 2023 07:57:56 -0700 (PDT) Received: from localhost.localdomain ([117.217.186.123]) by smtp.gmail.com with ESMTPSA id o17-20020a170902d4d100b001b0603829a0sm3577826plg.199.2023.06.01.07.57.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Jun 2023 07:57:55 -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 v5 6/9] PCI: endpoint: Add BME notifier support Date: Thu, 1 Jun 2023 20:27:15 +0530 Message-Id: <20230601145718.12204-7-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230601145718.12204-1-manivannan.sadhasivam@linaro.org> References: <20230601145718.12204-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@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 e0570b52698d..6c54fa5684d2 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); }; /**