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 X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D531AC4338F for ; Fri, 13 Aug 2021 09:54:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BCECD6109D for ; Fri, 13 Aug 2021 09:54:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239979AbhHMJy3 (ORCPT ); Fri, 13 Aug 2021 05:54:29 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:13312 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239875AbhHMJyV (ORCPT ); Fri, 13 Aug 2021 05:54:21 -0400 Received: from dggeme768-chm.china.huawei.com (unknown [172.30.72.56]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4GmJmH01Ckz83n9; Fri, 13 Aug 2021 17:53:50 +0800 (CST) Received: from localhost.localdomain (10.67.165.24) by dggeme768-chm.china.huawei.com (10.3.19.114) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Fri, 13 Aug 2021 17:53:52 +0800 From: Weili Qian To: , CC: , , , Subject: [PATCH v2 2/5] crypto: hisilicon - add runtime PM ops Date: Fri, 13 Aug 2021 17:50:06 +0800 Message-ID: <1628848209-26398-3-git-send-email-qianweili@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1628848209-26398-1-git-send-email-qianweili@huawei.com> References: <1628848209-26398-1-git-send-email-qianweili@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.165.24] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggeme768-chm.china.huawei.com (10.3.19.114) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Accelerator devices support runtime PM to reduce power consumption. This patch adds the runtime PM suspend/resume callbacks to the accelerator devices. Signed-off-by: Weili Qian --- drivers/crypto/hisilicon/qm.c | 118 ++++++++++++++++++++++++++++++++++++++++++ drivers/crypto/hisilicon/qm.h | 2 + 2 files changed, 120 insertions(+) diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c index e417cd0..dbe162a 100644 --- a/drivers/crypto/hisilicon/qm.c +++ b/drivers/crypto/hisilicon/qm.c @@ -5692,6 +5692,124 @@ int hisi_qm_init(struct hisi_qm *qm) } EXPORT_SYMBOL_GPL(hisi_qm_init); + +static int qm_prepare_for_suspend(struct hisi_qm *qm) +{ + struct pci_dev *pdev = qm->pdev; + int ret; + u32 val; + + ret = qm->ops->set_msi(qm, false); + if (ret) { + pci_err(pdev, "failed to disable MSI before suspending!\n"); + return ret; + } + + /* shutdown OOO register */ + writel(ACC_MASTER_GLOBAL_CTRL_SHUTDOWN, + qm->io_base + ACC_MASTER_GLOBAL_CTRL); + + ret = readl_relaxed_poll_timeout(qm->io_base + ACC_MASTER_TRANS_RETURN, + val, + (val == ACC_MASTER_TRANS_RETURN_RW), + POLL_PERIOD, POLL_TIMEOUT); + if (ret) { + pci_emerg(pdev, "Bus lock! Please reset system.\n"); + return ret; + } + + ret = qm_set_pf_mse(qm, false); + if (ret) + pci_err(pdev, "failed to disable MSE before suspending!\n"); + + return ret; +} + +static int qm_rebuild_for_resume(struct hisi_qm *qm) +{ + struct pci_dev *pdev = qm->pdev; + int ret; + + ret = qm_set_pf_mse(qm, true); + if (ret) { + pci_err(pdev, "failed to enable MSE after resuming!\n"); + return ret; + } + + ret = qm->ops->set_msi(qm, true); + if (ret) { + pci_err(pdev, "failed to enable MSI after resuming!\n"); + return ret; + } + + ret = qm_dev_hw_init(qm); + if (ret) { + pci_err(pdev, "failed to init device after resuming\n"); + return ret; + } + + qm_cmd_init(qm); + hisi_qm_dev_err_init(qm); + + return 0; +} + +/** + * hisi_qm_suspend() - Runtime suspend of given device. + * @dev: device to suspend. + * + * Function that suspend the device. + */ +int hisi_qm_suspend(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct hisi_qm *qm = pci_get_drvdata(pdev); + int ret; + + pci_info(pdev, "entering suspended state\n"); + + ret = hisi_qm_stop(qm, QM_NORMAL); + if (ret) { + pci_err(pdev, "failed to stop qm(%d)\n", ret); + return ret; + } + + ret = qm_prepare_for_suspend(qm); + if (ret) + pci_err(pdev, "failed to prepare suspended(%d)\n", ret); + + return ret; +} +EXPORT_SYMBOL_GPL(hisi_qm_suspend); + +/** + * hisi_qm_resume() - Runtime resume of given device. + * @dev: device to resume. + * + * Function that resume the device. + */ +int hisi_qm_resume(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct hisi_qm *qm = pci_get_drvdata(pdev); + int ret; + + pci_info(pdev, "resuming from suspend state\n"); + + ret = qm_rebuild_for_resume(qm); + if (ret) { + pci_err(pdev, "failed to rebuild resume(%d)\n", ret); + return ret; + } + + ret = hisi_qm_start(qm); + if (ret) + pci_err(pdev, "failed to start qm(%d)\n", ret); + + return 0; +} +EXPORT_SYMBOL_GPL(hisi_qm_resume); + MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Zhou Wang "); MODULE_DESCRIPTION("HiSilicon Accelerator queue manager driver"); diff --git a/drivers/crypto/hisilicon/qm.h b/drivers/crypto/hisilicon/qm.h index 0e5df1c..59e1646 100644 --- a/drivers/crypto/hisilicon/qm.h +++ b/drivers/crypto/hisilicon/qm.h @@ -431,5 +431,7 @@ void hisi_qm_dev_shutdown(struct pci_dev *pdev); void hisi_qm_wait_task_finish(struct hisi_qm *qm, struct hisi_qm_list *qm_list); int hisi_qm_alg_register(struct hisi_qm *qm, struct hisi_qm_list *qm_list); void hisi_qm_alg_unregister(struct hisi_qm *qm, struct hisi_qm_list *qm_list); +int hisi_qm_resume(struct device *dev); +int hisi_qm_suspend(struct device *dev); void hisi_qm_regs_dump(struct seq_file *s, struct debugfs_regset32 *regset); #endif -- 2.8.1