From patchwork Tue Nov 21 10:18:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiju Jose X-Patchwork-Id: 745758 Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CF40171B; Tue, 21 Nov 2023 02:19:03 -0800 (PST) Received: from lhrpeml500006.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4SZKwX3Mwgz6J9pf; Tue, 21 Nov 2023 18:14:04 +0800 (CST) Received: from SecurePC30232.china.huawei.com (10.122.247.234) by lhrpeml500006.china.huawei.com (7.191.161.198) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Tue, 21 Nov 2023 10:19:00 +0000 From: To: , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 02/10] cxl/mbox: Add GET_FEATURE mailbox command Date: Tue, 21 Nov 2023 18:18:35 +0800 Message-ID: <20231121101844.1161-3-shiju.jose@huawei.com> X-Mailer: git-send-email 2.35.1.windows.2 In-Reply-To: <20231121101844.1161-1-shiju.jose@huawei.com> References: <20231121101844.1161-1-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-Originating-IP: [10.122.247.234] X-ClientProxiedBy: lhrpeml100005.china.huawei.com (7.191.160.25) To lhrpeml500006.china.huawei.com (7.191.161.198) X-CFilter-Loop: Reflected From: Shiju Jose Add support for GET_FEATURE mailbox command. CXL spec 3.0 section 8.2.9.6 describes optional device specific features. The settings of a feature can be retrieved using Get Feature command. Signed-off-by: Shiju Jose --- drivers/cxl/core/mbox.c | 23 +++++++++++++++++++++++ drivers/cxl/cxlmem.h | 23 +++++++++++++++++++++++ include/uapi/linux/cxl_mem.h | 1 + 3 files changed, 47 insertions(+) diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 06ec9ef50e7f..2675c616caec 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -64,6 +64,7 @@ static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = { CXL_CMD(SET_SHUTDOWN_STATE, 0x1, 0, 0), CXL_CMD(GET_SCAN_MEDIA_CAPS, 0x10, 0x4, 0), CXL_CMD(GET_SUPPORTED_FEATURES, 0x8, CXL_VARIABLE_PAYLOAD, 0), + CXL_CMD(GET_FEATURE, 0x15, CXL_VARIABLE_PAYLOAD, 0), }; /* @@ -1327,6 +1328,28 @@ int cxl_get_supported_features(struct cxl_memdev_state *mds, } EXPORT_SYMBOL_NS_GPL(cxl_get_supported_features, CXL); +int cxl_get_feature(struct cxl_memdev_state *mds, + struct cxl_mbox_get_feat_in *pi, void *feat_out) +{ + struct cxl_mbox_cmd mbox_cmd; + int rc; + + mbox_cmd = (struct cxl_mbox_cmd) { + .opcode = CXL_MBOX_OP_GET_FEATURE, + .size_in = sizeof(*pi), + .payload_in = pi, + .size_out = pi->count, + .payload_out = feat_out, + .min_out = pi->count, + }; + rc = cxl_internal_send_cmd(mds, &mbox_cmd); + if (rc < 0) + return rc; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(cxl_get_feature, CXL); + int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len, struct cxl_region *cxlr) { diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index d831dad748f5..92c1f2a44713 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -507,6 +507,7 @@ enum cxl_opcode { CXL_MBOX_OP_GET_SUPPORTED_LOGS = 0x0400, CXL_MBOX_OP_GET_LOG = 0x0401, CXL_MBOX_OP_GET_SUPPORTED_FEATURES = 0x0500, + CXL_MBOX_OP_GET_FEATURE = 0x0501, CXL_MBOX_OP_IDENTIFY = 0x4000, CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100, CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101, @@ -796,6 +797,26 @@ struct cxl_mbox_get_supp_feats_out { struct cxl_mbox_supp_feat_entry feat_entries[]; } __packed; +/* Get Feature CXL 3.0 Spec 8.2.9.6.2 */ +/* + * Get Feature input payload + * CXL rev 3.0 section 8.2.9.6.2; Table 8-79 + */ +/* Get Feature : Payload in selection */ +enum cxl_get_feat_selection { + CXL_GET_FEAT_SEL_CURRENT_VALUE = 0x0, + CXL_GET_FEAT_SEL_DEFAULT_VALUE = 0x1, + CXL_GET_FEAT_SEL_SAVED_VALUE = 0x2, + CXL_GET_FEAT_SEL_MAX +}; + +struct cxl_mbox_get_feat_in { + uuid_t uuid; + __le16 offset; + __le16 count; + u8 selection; +} __packed; + /* Get Poison List CXL 3.0 Spec 8.2.9.8.4.1 */ struct cxl_mbox_poison_in { __le64 offset; @@ -926,6 +947,8 @@ int cxl_set_timestamp(struct cxl_memdev_state *mds); int cxl_get_supported_features(struct cxl_memdev_state *mds, struct cxl_mbox_get_supp_feats_in *pi, void *feats_out); +int cxl_get_feature(struct cxl_memdev_state *mds, + struct cxl_mbox_get_feat_in *pi, void *feat_out); int cxl_poison_state_init(struct cxl_memdev_state *mds); int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len, struct cxl_region *cxlr); diff --git a/include/uapi/linux/cxl_mem.h b/include/uapi/linux/cxl_mem.h index 656450274001..b20de60bfc71 100644 --- a/include/uapi/linux/cxl_mem.h +++ b/include/uapi/linux/cxl_mem.h @@ -47,6 +47,7 @@ ___DEPRECATED(SCAN_MEDIA, "Scan Media"), \ ___DEPRECATED(GET_SCAN_MEDIA, "Get Scan Media Results"), \ ___C(GET_SUPPORTED_FEATURES, "Get Supported Features"), \ + ___C(GET_FEATURE, "Get Feature"), \ ___C(MAX, "invalid / last command") #define ___C(a, b) CXL_MEM_COMMAND_ID_##a