From patchwork Wed Sep 11 09:04:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiju Jose X-Patchwork-Id: 13800067 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 563C617F4E5; Wed, 11 Sep 2024 09:07:56 +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=1726045678; cv=none; b=kvZLiMpMroTDhZF/xVYC6iaf3qt6VgDuzM8IDMQEVU73v0DC3Mu7JdEKKA5fAaKTdlO5ZnvXUv0JhZukzmJSdObrIT3C9O9QDTnZLPHbtzt+8U9IKfzcTuPkzcTWH5RberQehomctq1XlxfR3jEVnKemgPvIai7eIig98A1JeIE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726045678; c=relaxed/simple; bh=OvTqvn4mii9VkG2IHT4xBfuRyej04nBOivVtYKdugnw=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ksqubaRdrG1A/onBbVFdaj+/AKAYEDXL5nD/Ip0il0oC3ofzTdPHumsqOCr9smSwQFmROySPAs/+IMuAnCXHMofEDii0mLK7SwG0SJLHQpzW6dJ450nSFXmMMLjzrhzfinqtQam48W3wOf5uCMoZa1XakvaTMJQ+HSwkHe7xh1I= 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 [172.18.186.216]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4X3ZPP73vZz6K5wh; Wed, 11 Sep 2024 17:03:53 +0800 (CST) Received: from frapeml500007.china.huawei.com (unknown [7.182.85.172]) by mail.maildlp.com (Postfix) with ESMTPS id D7E6B140A77; Wed, 11 Sep 2024 17:07:51 +0800 (CST) Received: from P_UKIT01-A7bmah.china.huawei.com (10.195.245.151) 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; Wed, 11 Sep 2024 11:07:49 +0200 From: To: , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v12 16/17] cxl/mbox: Add support for PERFORM_MAINTENANCE mailbox command Date: Wed, 11 Sep 2024 10:04:45 +0100 Message-ID: <20240911090447.751-17-shiju.jose@huawei.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20240911090447.751-1-shiju.jose@huawei.com> References: <20240911090447.751-1-shiju.jose@huawei.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml500003.china.huawei.com (7.191.162.67) 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. Signed-off-by: Shiju Jose --- drivers/cxl/core/mbox.c | 40 ++++++++++++++++++++++++++++++++++++++++ drivers/cxl/cxlmem.h | 17 +++++++++++++++++ 2 files changed, 57 insertions(+) diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 806b1c8087b0..6c91f5f5be48 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -1079,6 +1079,46 @@ int cxl_set_feature(struct cxl_dev_state *cxlds, } EXPORT_SYMBOL_NS_GPL(cxl_set_feature, CXL); +int cxl_do_maintenance(struct cxl_dev_state *cxlds, + u8 class, u8 subclass, + void *data_in, size_t data_in_size) +{ + struct cxl_mailbox *cxl_mbox = &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; + int rc = 0; + + 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, + }; + + rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd); + if (rc < 0) + return rc; + + return 0; +} +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 2187c3378eaa..ba454a2315ee 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -489,6 +489,7 @@ 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, @@ -865,6 +866,19 @@ 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); @@ -942,4 +956,7 @@ int cxl_set_feature(struct cxl_dev_state *cxlds, 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_dev_state *cxlds, + u8 class, u8 subclass, + void *data_in, size_t data_in_size); #endif /* __CXL_MEM_H__ */