From patchwork Tue Nov 21 10:18:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiju Jose X-Patchwork-Id: 13462781 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 4099F171E; Tue, 21 Nov 2023 02:19:04 -0800 (PST) Received: from lhrpeml500006.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4SZKwY56B8z67nhP; Tue, 21 Nov 2023 18:14:05 +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 10:19:01 +0000 From: To: , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 03/10] cxl/mbox: Add SET_FEATURE mailbox command Date: Tue, 21 Nov 2023 18:18:36 +0800 Message-ID: <20231121101844.1161-4-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-cxl@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 SET_FEATURE mailbox command. CXL spec 3.0 section 8.2.9.6 describes optional device specific features. CXL devices supports features with changeable attributes. The settings of a feature can be optionally modified using Set Feature command. Signed-off-by: Shiju Jose --- drivers/cxl/core/mbox.c | 15 +++++++++++++++ drivers/cxl/cxlmem.h | 27 +++++++++++++++++++++++++++ include/uapi/linux/cxl_mem.h | 1 + 3 files changed, 43 insertions(+) diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 2675c616caec..d892b07446ca 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -65,6 +65,7 @@ static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = { 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), + CXL_CMD(SET_FEATURE, CXL_VARIABLE_PAYLOAD, 0, 0), }; /* @@ -1350,6 +1351,20 @@ int cxl_get_feature(struct cxl_memdev_state *mds, } EXPORT_SYMBOL_NS_GPL(cxl_get_feature, CXL); +int cxl_set_feature(struct cxl_memdev_state *mds, void *feat_in, size_t size) +{ + struct cxl_mbox_cmd mbox_cmd; + + mbox_cmd = (struct cxl_mbox_cmd) { + .opcode = CXL_MBOX_OP_SET_FEATURE, + .size_in = size, + .payload_in = feat_in, + }; + + return cxl_internal_send_cmd(mds, &mbox_cmd); +} +EXPORT_SYMBOL_NS_GPL(cxl_set_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 92c1f2a44713..46131dcd0900 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -508,6 +508,7 @@ enum cxl_opcode { CXL_MBOX_OP_GET_LOG = 0x0401, CXL_MBOX_OP_GET_SUPPORTED_FEATURES = 0x0500, CXL_MBOX_OP_GET_FEATURE = 0x0501, + CXL_MBOX_OP_SET_FEATURE = 0x0502, CXL_MBOX_OP_IDENTIFY = 0x4000, CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100, CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101, @@ -817,6 +818,31 @@ struct cxl_mbox_get_feat_in { u8 selection; } __packed; +/* Set Feature CXL 3.0 Spec 8.2.9.6.3 */ +/* + * Set Feature input payload + * CXL rev 3.0 section 8.2.9.6.3; Table 8-81 + */ +/* Set Feature : Payload in flags */ +#define CXL_SET_FEAT_FLAG_DATA_TRANSFER_MASK GENMASK(2, 0) +enum cxl_set_feat_flag_data_transfer { + CXL_SET_FEAT_FLAG_FULL_DATA_TRANSFER = 0x0, + CXL_SET_FEAT_FLAG_INITIATE_DATA_TRANSFER = 0x1, + CXL_SET_FEAT_FLAG_CONTINUE_DATA_TRANSFER = 0x2, + CXL_SET_FEAT_FLAG_FINISH_DATA_TRANSFER = 0x3, + CXL_SET_FEAT_FLAG_ABORT_DATA_TRANSFER = 0x4, + CXL_SET_FEAT_FLAG_DATA_TRANSFER_MAX +}; +#define CXL_SET_FEAT_FLAG_MOD_VALUE_SAVED_ACROSS_RESET BIT(3) + +struct cxl_mbox_set_feat_in { + uuid_t uuid; + __le32 flags; + __le16 offset; + u8 version; + u8 rsvd[9]; +} __packed; + /* Get Poison List CXL 3.0 Spec 8.2.9.8.4.1 */ struct cxl_mbox_poison_in { __le64 offset; @@ -949,6 +975,7 @@ int cxl_get_supported_features(struct cxl_memdev_state *mds, void *feats_out); int cxl_get_feature(struct cxl_memdev_state *mds, struct cxl_mbox_get_feat_in *pi, void *feat_out); +int cxl_set_feature(struct cxl_memdev_state *mds, void *feat_in, size_t size); 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 b20de60bfc71..8c89d323cc41 100644 --- a/include/uapi/linux/cxl_mem.h +++ b/include/uapi/linux/cxl_mem.h @@ -48,6 +48,7 @@ ___DEPRECATED(GET_SCAN_MEDIA, "Get Scan Media Results"), \ ___C(GET_SUPPORTED_FEATURES, "Get Supported Features"), \ ___C(GET_FEATURE, "Get Feature"), \ + ___C(SET_FEATURE, "Set Feature"), \ ___C(MAX, "invalid / last command") #define ___C(a, b) CXL_MEM_COMMAND_ID_##a