From patchwork Thu Feb 27 22:38:11 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiju Jose X-Patchwork-Id: 868992 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7252E27183D; Thu, 27 Feb 2025 22:39:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740695973; cv=none; b=PV80cTpAwQOkj3GCPHYXmG5xFAi5KWEYWs+8khqwV5uopO0SUL5vb5VV0T0G0g4MIUIRmGkgaLXKv8hhMKCjIKgCN2BjKHCvxzBTpVfGEabUIl6vvu6blJj8mVKxWwQH2c+ijQ9K2GTKY+ZFRHzHIChIs3+hP0y1xxcKgQHIAXk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740695973; c=relaxed/simple; bh=ePkmvjyLKjKyUBBrvMo7E8uw1XIJh/jwd3inanVHDm0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=iyKUmGRI2m1dTJ33m2wVAWaCVu3sZJGL8DUriY9YOOMWdpsbvFFkIMAoDlPv05+T9qHCyowmivwYnuJ/aCETc9sDQtzIMYbcvVvgLge2sQkbv+vHQOhia7mlneRWjqep9G+49KmYEerrrrIkiho91P3fuM6CBp3qpFjOJD/xbUQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.31]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Z3mQ42Zcfz6L53c; Fri, 28 Feb 2025 06:35:40 +0800 (CST) Received: from frapeml500007.china.huawei.com (unknown [7.182.85.172]) by mail.maildlp.com (Postfix) with ESMTPS id 3ABB71404F5; Fri, 28 Feb 2025 06:39:29 +0800 (CST) Received: from P_UKIT01-A7bmah.china.huawei.com (10.48.149.240) by frapeml500007.china.huawei.com (7.182.85.172) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 27 Feb 2025 23:39:26 +0100 From: To: , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH 4/8] cxl/mbox: Add support for PERFORM_MAINTENANCE mailbox command Date: Thu, 27 Feb 2025 22:38:11 +0000 Message-ID: <20250227223816.2036-5-shiju.jose@huawei.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20250227223816.2036-1-shiju.jose@huawei.com> References: <20250227223816.2036-1-shiju.jose@huawei.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml500011.china.huawei.com (7.191.174.215) To frapeml500007.china.huawei.com (7.182.85.172) From: Shiju Jose Add support for PERFORM_MAINTENANCE mailbox command. CXL spec 3.2 section 8.2.10.7.1 describes the Perform Maintenance command. This command requests the device to execute the maintenance operation specified by the maintenance operation class and the maintenance operation subclass. Reviewed-by: Jonathan Cameron Reviewed-by: Dave Jiang Signed-off-by: Shiju Jose --- drivers/cxl/core/mbox.c | 34 ++++++++++++++++++++++++++++++++++ drivers/cxl/cxlmem.h | 17 +++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index d72764056ce6..19d46a284650 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -824,6 +824,40 @@ static const uuid_t log_uuid[] = { [VENDOR_DEBUG_UUID] = DEFINE_CXL_VENDOR_DEBUG_UUID, }; +int cxl_do_maintenance(struct cxl_mailbox *cxl_mbox, + u8 class, u8 subclass, + void *data_in, size_t data_in_size) +{ + struct cxl_memdev_maintenance_pi { + struct cxl_mbox_do_maintenance_hdr hdr; + u8 data[]; + } __packed; + struct cxl_mbox_cmd mbox_cmd; + size_t hdr_size; + + struct cxl_memdev_maintenance_pi *pi __free(kfree) = + kmalloc(cxl_mbox->payload_size, GFP_KERNEL); + pi->hdr.op_class = class; + pi->hdr.op_subclass = subclass; + hdr_size = sizeof(pi->hdr); + /* + * Check minimum mbox payload size is available for + * the maintenance data transfer. + */ + if (hdr_size + data_in_size > cxl_mbox->payload_size) + return -ENOMEM; + + memcpy(pi->data, data_in, data_in_size); + mbox_cmd = (struct cxl_mbox_cmd) { + .opcode = CXL_MBOX_OP_DO_MAINTENANCE, + .size_in = hdr_size + data_in_size, + .payload_in = pi, + }; + + return cxl_internal_send_cmd(cxl_mbox, &mbox_cmd); +} +EXPORT_SYMBOL_NS_GPL(cxl_do_maintenance, "CXL"); + /** * cxl_enumerate_cmds() - Enumerate commands for a device. * @mds: The driver data for the operation diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index a08405f94a30..642ce976dcee 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -527,6 +527,7 @@ enum cxl_opcode { CXL_MBOX_OP_GET_SUPPORTED_FEATURES = 0x0500, CXL_MBOX_OP_GET_FEATURE = 0x0501, CXL_MBOX_OP_SET_FEATURE = 0x0502, + CXL_MBOX_OP_DO_MAINTENANCE = 0x0600, CXL_MBOX_OP_IDENTIFY = 0x4000, CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100, CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101, @@ -827,6 +828,19 @@ enum { CXL_PMEM_SEC_PASS_USER, }; +/* + * Perform Maintenance CXL 3.2 Spec 8.2.10.7.1 + */ + +/* + * Perform Maintenance input payload + * CXL rev 3.2 section 8.2.10.7.1 Table 8-117 + */ +struct cxl_mbox_do_maintenance_hdr { + u8 op_class; + u8 op_subclass; +} __packed; + int cxl_internal_send_cmd(struct cxl_mailbox *cxl_mbox, struct cxl_mbox_cmd *cmd); int cxl_dev_state_identify(struct cxl_memdev_state *mds); @@ -898,4 +912,7 @@ struct cxl_hdm { struct seq_file; struct dentry *cxl_debugfs_create_dir(const char *dir); void cxl_dpa_debug(struct seq_file *file, struct cxl_dev_state *cxlds); +int cxl_do_maintenance(struct cxl_mailbox *cxl_mbox, + u8 class, u8 subclass, + void *data_in, size_t data_in_size); #endif /* __CXL_MEM_H__ */