From patchwork Fri Nov 1 09:17:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiju Jose X-Patchwork-Id: 840291 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 7606819E819; Fri, 1 Nov 2024 09:18:28 +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=1730452710; cv=none; b=q8kyaLtxzXa1aHtBgFtm+dGyEhPQ+jbtyxkmHipL2acsTjV4XPA5zpD6adRAunqUGr9d8neWzWnHKsuZYOm00wW+6h1gfYQTP7n7n9yQhJhSYSPnhF1c5bicOevRLWsjjoa0IcVpCvAvwjgT+OCB5DnFqFSBGK9PntvVGzYUfng= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730452710; c=relaxed/simple; bh=FupnhxuSjahKCHkNg3MJ8k+3g63VZ9cU9new3PiUbkM=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=HSLcagDWKJ6Axfk7CvAPXG1d7eAlV57VY5g7iUc8XyrWrySMNYOG+W7GDdlqpc1s8okkahC1acX6m/oWtYQlzk59aW6hSd7Rp7myoTbWIEBwHXlisym6aX/353cg/l8noh+Ry9fDcMPWEI/bXo/M2rKSMH7kru170MYdoDfXDLs= 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 4XfwC04zF2z6L6fL; Fri, 1 Nov 2024 17:13:32 +0800 (CST) Received: from frapeml500007.china.huawei.com (unknown [7.182.85.172]) by mail.maildlp.com (Postfix) with ESMTPS id 7FEF6140445; Fri, 1 Nov 2024 17:18:26 +0800 (CST) Received: from P_UKIT01-A7bmah.china.huawei.com (10.126.171.129) 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; Fri, 1 Nov 2024 10:18:24 +0100 From: To: , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v15 12/15] cxl/mbox: Add support for PERFORM_MAINTENANCE mailbox command Date: Fri, 1 Nov 2024 09:17:30 +0000 Message-ID: <20241101091735.1465-13-shiju.jose@huawei.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20241101091735.1465-1-shiju.jose@huawei.com> References: <20241101091735.1465-1-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: lhrpeml500004.china.huawei.com (7.191.163.9) To frapeml500007.china.huawei.com (7.182.85.172) From: Shiju Jose Add support for PERFORM_MAINTENANCE mailbox command. CXL spec 3.1 section 8.2.9.7.1 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 Signed-off-by: Shiju Jose Reviewed-by: Dave Jiang --- drivers/cxl/core/mbox.c | 35 +++++++++++++++++++++++++++++++++++ drivers/cxl/cxlmem.h | 17 +++++++++++++++++ 2 files changed, 52 insertions(+) diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 4b9e62de164b..381cf9d61c85 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -1084,6 +1084,41 @@ int cxl_set_feature(struct cxl_memdev_state *mds, } EXPORT_SYMBOL_NS_GPL(cxl_set_feature, CXL); +int cxl_do_maintenance(struct cxl_memdev_state *mds, + u8 class, u8 subclass, + void *data_in, size_t data_in_size) +{ + struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox; + 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 9259c5d70a65..28290f7c89f7 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -533,6 +533,7 @@ 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, @@ -909,6 +910,19 @@ struct cxl_mbox_set_feat_hdr { u8 rsvd[9]; } __packed; +/* + * Perform Maintenance CXL 3.1 Spec 8.2.9.7.1 + */ + +/* + * Perform Maintenance input payload + * CXL rev 3.1 section 8.2.9.7.1 Table 8-102 + */ +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); @@ -986,4 +1000,7 @@ int cxl_set_feature(struct cxl_memdev_state *mds, const uuid_t feat_uuid, u8 feat_version, void *feat_data, size_t feat_data_size, u8 feat_flag); +int cxl_do_maintenance(struct cxl_memdev_state *mds, + u8 class, u8 subclass, + void *data_in, size_t data_in_size); #endif /* __CXL_MEM_H__ */