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[2620:137:e000::1:20]) by mx.google.com with ESMTP id 2-20020a631542000000b004561c1f132csi16625515pgv.346.2022.11.08.14.47.38; Tue, 08 Nov 2022 14:47:52 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=oTRcmTIK; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230024AbiKHWqk (ORCPT + 99 others); Tue, 8 Nov 2022 17:46:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40420 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230001AbiKHWq2 (ORCPT ); Tue, 8 Nov 2022 17:46:28 -0500 Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00585657D8; Tue, 8 Nov 2022 14:46:23 -0800 (PST) Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 2A8MkEfu003133; Tue, 8 Nov 2022 16:46:14 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1667947574; bh=EjlCilpLrZxCyfSqrAGtwQd9sYm96Rde+R7Vbg7ry7s=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=oTRcmTIKvVHNHqe4SGjs7M7j7eSxLMN8kJakvRsgGar0SUtbVKXYYeo0cc0aPK3so hQw685dPk1Xe8TcXSU54FNsD91M57vjF3T2+KhC1Zfd7ZFVluulHWwCB0ZzohYBGR2 b8sVdkDRiQvbWJHPjxHqJS7w/nlUN5D/eImwAbAs= Received: from DLEE100.ent.ti.com (dlee100.ent.ti.com [157.170.170.30]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 2A8MkEY0114263 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 8 Nov 2022 16:46:14 -0600 Received: from DLEE104.ent.ti.com (157.170.170.34) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6; Tue, 8 Nov 2022 16:46:14 -0600 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6 via Frontend Transport; Tue, 8 Nov 2022 16:46:14 -0600 Received: from jti.ent.ti.com (ileaxei01-snat.itg.ti.com [10.180.69.5]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 2A8MjSp0071038; Tue, 8 Nov 2022 16:46:06 -0600 From: Georgi Vlaev To: Nishanth Menon , Tero Kristo , Santosh Shilimkar , Rob Herring , Krzysztof Kozlowski CC: , , , Vibhore Vardhan , Vignesh Raghavendra , Georgi Vlaev Subject: [PATCH v2 4/5] firmware: ti_sci: Use dt provided fw name and address to load at suspend time Date: Wed, 9 Nov 2022 00:45:26 +0200 Message-ID: <20221108224527.137179-5-g-vlaev@ti.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221108224527.137179-1-g-vlaev@ti.com> References: <20221108224527.137179-1-g-vlaev@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748969898006363823?= X-GMAIL-MSGID: =?utf-8?q?1748969898006363823?= From: Dave Gerlach Use request_firmware_direct to load the fs stub LPM firmware to a provided memory region. The filename for the firmware is provided in the device tree as "firmware-name". Use a pm_notifier for loading of the low power firmware during PM_SUSPEND_PREPARE phase so that it can be loaded from the rootfs before it is suspended. It is possible in the future for this firmware to require reload, so add a check to indicate that the firmware is currently loaded so it is only loaded once. Signed-off-by: Dave Gerlach Signed-off-by: Vibhore Vardhan Signed-off-by: Georgi Vlaev --- drivers/firmware/ti_sci.c | 97 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c index 6a07c7276c24..4986df1b8570 100644 --- a/drivers/firmware/ti_sci.c +++ b/drivers/firmware/ti_sci.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -22,6 +23,7 @@ #include #include #include +#include #include #include "ti_sci.h" @@ -89,10 +91,13 @@ struct ti_sci_desc { * @dev: Device pointer * @desc: SoC description for this instance * @nb: Reboot Notifier block + * @pm_nb: PM notifier block * @d: Debugfs file entry * @debug_region: Memory region where the debug message are available * @debug_region_size: Debug region size * @debug_buffer: Buffer allocated to copy debug messages. + * @lpm_region: Memory region where the FS Stub LPM Firmware will be stored + * @lpm_region_size: LPM region size * @handle: Instance of TI SCI handle to send to clients. * @cl: Mailbox Client * @chan_tx: Transmit mailbox channel @@ -104,15 +109,20 @@ struct ti_sci_desc { * @ctx_mem_buf: Low power context memory buffer * @users: Number of users of this instance * @is_suspending: Flag set to indicate in suspend path. + * @lpm_firmware_loaded: Flag to indicate if LPM firmware has been loaded + * @lpm_firmware_name: Name of firmware binary to load from fw search path */ struct ti_sci_info { struct device *dev; struct notifier_block nb; + struct notifier_block pm_nb; const struct ti_sci_desc *desc; struct dentry *d; void __iomem *debug_region; char *debug_buffer; size_t debug_region_size; + void __iomem *lpm_region; + size_t lpm_region_size; struct ti_sci_handle handle; struct mbox_client cl; struct mbox_chan *chan_tx; @@ -125,11 +135,14 @@ struct ti_sci_info { /* protected by ti_sci_list_mutex */ int users; bool is_suspending; + bool lpm_firmware_loaded; + const char *lpm_firmware_name; }; #define cl_to_ti_sci_info(c) container_of(c, struct ti_sci_info, cl) #define handle_to_ti_sci_info(h) container_of(h, struct ti_sci_info, handle) #define reboot_to_ti_sci_info(n) container_of(n, struct ti_sci_info, nb) +#define pm_nb_to_ti_sci_info(n) container_of(n, struct ti_sci_info, pm_nb) #ifdef CONFIG_DEBUG_FS @@ -3465,6 +3478,32 @@ static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode, return NOTIFY_BAD; } +static int ti_sci_load_lpm_firmware(struct device *dev, struct ti_sci_info *info) +{ + const struct firmware *firmware; + int ret = 0; + + /* If no firmware name is set, do not attempt to load. */ + if (!info->lpm_firmware_name) + return -EINVAL; + + ret = request_firmware_direct(&firmware, info->lpm_firmware_name, dev); + if (ret) { + dev_warn(dev, "Cannot load %s\n", info->lpm_firmware_name); + return ret; + } + + if (firmware->size > info->lpm_region_size) { + release_firmware(firmware); + return -ENOMEM; + } + + memcpy_toio(info->lpm_region, firmware->data, firmware->size); + + release_firmware(firmware); + + return ret; +} static void ti_sci_set_is_suspending(struct ti_sci_info *info, bool is_suspending) { info->is_suspending = is_suspending; @@ -3494,10 +3533,33 @@ static int ti_sci_resume(struct device *dev) static DEFINE_SIMPLE_DEV_PM_OPS(ti_sci_pm_ops, ti_sci_suspend, ti_sci_resume); +static int tisci_pm_handler(struct notifier_block *nb, unsigned long pm_event, + void *unused) +{ + struct ti_sci_info *info = pm_nb_to_ti_sci_info(nb); + int ret; + + /* Load the LPM firmware on PM_SUSPEND_PREPARE if not loaded yet */ + if (pm_event != PM_SUSPEND_PREPARE || info->lpm_firmware_loaded) + return NOTIFY_DONE; + + ret = ti_sci_load_lpm_firmware(info->dev, info); + if (ret) { + dev_err(info->dev, "Failed to LPM firmware, suspend is disabled (%d)\n", + ret); + return NOTIFY_BAD; + } + + info->lpm_firmware_loaded = true; + + return NOTIFY_OK; +} + static int ti_sci_init_suspend(struct platform_device *pdev, struct ti_sci_info *info) { struct device *dev = &pdev->dev; + struct resource *res; int ret; dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); @@ -3521,6 +3583,38 @@ static int ti_sci_init_suspend(struct platform_device *pdev, if (ret) goto err; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpm"); + if (!res) { + dev_warn(dev, + "lpm region is required for suspend but not provided.\n"); + ret = -EINVAL; + goto err; + } + + info->lpm_region = devm_ioremap_resource(dev, res); + if (IS_ERR(info->lpm_region)) { + ret = PTR_ERR(info->lpm_region); + goto err; + } + info->lpm_region_size = resource_size(res); + + if (of_property_read_string(dev->of_node, "firmware-name", + &info->lpm_firmware_name)) { + dev_warn(dev, + "firmware-name is required for suspend but not provided.\n"); + ret = -EINVAL; + goto err; + } + + info->pm_nb.notifier_call = tisci_pm_handler; + info->pm_nb.priority = 128; + + ret = register_pm_notifier(&info->pm_nb); + if (ret) { + dev_err(dev, "pm_notifier registration fail(%d)\n", ret); + goto err; + } + return 0; err: dma_free_coherent(info->dev, LPM_CTX_MEM_SIZE, @@ -3718,6 +3812,9 @@ static int ti_sci_remove(struct platform_device *pdev) info = platform_get_drvdata(pdev); + if (info->pm_nb.notifier_call) + unregister_pm_notifier(&info->pm_nb); + if (info->nb.notifier_call) unregister_restart_handler(&info->nb);