From patchwork Mon Sep 3 10:33:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avri Altman X-Patchwork-Id: 10585753 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B9C21139B for ; Mon, 3 Sep 2018 10:35:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A6AF028417 for ; Mon, 3 Sep 2018 10:35:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 99AE429580; Mon, 3 Sep 2018 10:35:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3538C28417 for ; Mon, 3 Sep 2018 10:35:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726173AbeICOyo (ORCPT ); Mon, 3 Sep 2018 10:54:44 -0400 Received: from esa6.hgst.iphmx.com ([216.71.154.45]:40688 "EHLO esa6.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726153AbeICOyo (ORCPT ); Mon, 3 Sep 2018 10:54:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1535970912; x=1567506912; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=DRxyUcQJX914dINw5sPaHTKjpvLxipso5+MSGNRlwo4=; b=SFWGnxS3yYgUTqnVo8+KumNiSYKCGpwCUww43rwUrKtUr7nUNz7CkNw9 c6bqsprmhJu6VNMBw9D22puXN/q0E7tM7lj7/GaNnMe66To80GkU6JSlo c1rBxxxlxVYMKxuItzlF0sO0cHusyWeeMASoAv9VtrDLfdF0RVgD/sggn dHy6kUZATB0pY6+9wvaNkef7SSh82qIkGZUrDk6p+BsEvvtSkPrdxP+je XeehL9kIL6lkJ88PmF6OTzBF4XkhZYwaQVKtmgVTVoGiaK4fho+nM+bdp 4F7yvFr8r7O9jTc9DLWlVCoC08bUO0BJTft+fx2LuVkQ4qQKx9babWX7f Q==; X-IronPort-AV: E=Sophos;i="5.53,324,1531756800"; d="scan'208";a="90486177" Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 03 Sep 2018 18:35:12 +0800 Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP; 03 Sep 2018 03:21:55 -0700 Received: from kfae422988.sdcorp.global.sandisk.com ([10.0.231.37]) by uls-op-cesaip02.wdc.com with ESMTP; 03 Sep 2018 03:35:07 -0700 From: Avri Altman To: Christoph Hellwig , Johannes Thumshirn , Hannes Reinecke , Bart Van Assche , "James E.J. Bottomley" , "Martin K. Petersen" , linux-scsi@vger.kernel.org Cc: Stanislav Nijnikov , Avi Shchislowski , Alex Lemberg , Subhash Jadavani , Vinayak Holikatti , Avri Altman Subject: [PATCH v3 7/7] scsi: ufs-bsg: Add support for uic commands in ufs_bsg_request() Date: Mon, 3 Sep 2018 13:33:16 +0300 Message-Id: <1535970796-25582-8-git-send-email-avri.altman@wdc.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1535970796-25582-1-git-send-email-avri.altman@wdc.com> References: <1535970796-25582-1-git-send-email-avri.altman@wdc.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add support to those uic commands, that are currently supported by ufshcd api: the variants of dme_{peer}_{set_get}. At this point better not to add any new api, as careless uic command may turn the device into a brick. Signed-off-by: Avri Altman --- drivers/scsi/ufs/ufs_bsg.c | 56 +++++++++++++++++++++++++++++++++++++++++++++- drivers/scsi/ufs/ufs_bsg.h | 2 ++ 2 files changed, 57 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/ufs/ufs_bsg.c b/drivers/scsi/ufs/ufs_bsg.c index 8c9167d..d1255be 100644 --- a/drivers/scsi/ufs/ufs_bsg.c +++ b/drivers/scsi/ufs/ufs_bsg.c @@ -61,6 +61,55 @@ static int ufs_bsg_verify_query_size(unsigned int request_len, return 0; } +static int ufs_bsg_exec_uic_cmd(struct uic_command *uc) +{ + u32 attr_sel = uc->argument1; + u8 attr_set = (uc->argument2 >> 16) & 0xff; + u32 mib_val = uc->argument3; + int cmd = uc->command; + int ret = 0; + + switch (cmd) { + case UIC_CMD_DME_GET: + ret = ufshcd_dme_get_attr(bsg_host->hba, attr_sel, + &mib_val, DME_LOCAL); + break; + case UIC_CMD_DME_SET: + ret = ufshcd_dme_set_attr(bsg_host->hba, attr_sel, attr_set, + mib_val, DME_LOCAL); + break; + case UIC_CMD_DME_PEER_GET: + ret = ufshcd_dme_get_attr(bsg_host->hba, attr_sel, + &mib_val, DME_PEER); + break; + case UIC_CMD_DME_PEER_SET: + ret = ufshcd_dme_set_attr(bsg_host->hba, attr_sel, attr_set, + mib_val, DME_PEER); + break; + case UIC_CMD_DME_POWERON: + case UIC_CMD_DME_POWEROFF: + case UIC_CMD_DME_ENABLE: + case UIC_CMD_DME_RESET: + case UIC_CMD_DME_END_PT_RST: + case UIC_CMD_DME_LINK_STARTUP: + case UIC_CMD_DME_HIBER_ENTER: + case UIC_CMD_DME_HIBER_EXIT: + case UIC_CMD_DME_TEST_MODE: + ret = -ENOTSUPP; + pr_err("%s unsupported command 0x%x\n", __func__, cmd); + break; + default: + ret = -EINVAL; + } + + if (ret) + pr_err("%s error in command 0x%x\n", __func__, cmd); + + uc->argument3 = mib_val; + + return ret; +} + static int ufs_bsg_request(struct bsg_job *job) { struct ufs_bsg_request *bsg_request = job->request; @@ -68,6 +117,7 @@ static int ufs_bsg_request(struct bsg_job *job) unsigned int request_len = job->request_len; unsigned int reply_len = job->reply_len; struct utp_upiu_query *qr; + struct uic_command uc = {}; struct utp_upiu_req *req_upiu = NULL; struct utp_upiu_req *rsp_upiu = NULL; int msgcode; @@ -122,7 +172,11 @@ static int ufs_bsg_request(struct bsg_job *job) break; case UPIU_TRANSACTION_UIC_CMD: - /* later */ + memcpy(&uc, &bsg_request->tsf.uc, UIC_CMD_SIZE); + ret = ufs_bsg_exec_uic_cmd(&uc); + memcpy(&bsg_reply->tsf.uc, &uc, UIC_CMD_SIZE); + + break; case UPIU_TRANSACTION_COMMAND: case UPIU_TRANSACTION_DATA_OUT: not_supported: diff --git a/drivers/scsi/ufs/ufs_bsg.h b/drivers/scsi/ufs/ufs_bsg.h index 9cc71bc..219597d 100644 --- a/drivers/scsi/ufs/ufs_bsg.h +++ b/drivers/scsi/ufs/ufs_bsg.h @@ -15,6 +15,8 @@ #define UFS_BSG_NOP (-1) #define UPIU_TRANSACTION_UIC_CMD 0x1F +/* uic commands are 4DW long, per UFSHCI V2.1 paragraph 5.6.1 */ +#define UIC_CMD_SIZE (sizeof(u32) * 4) enum { REQ_UPIU_SIZE_DWORDS = 8,