From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3tSPt8292gzDvwT for ; Tue, 29 Nov 2016 11:43:27 +1100 (AEDT) Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id uAT0hQJJ123274 for ; Mon, 28 Nov 2016 19:43:26 -0500 Received: from e17.ny.us.ibm.com (e17.ny.us.ibm.com [129.33.205.207]) by mx0a-001b2d01.pphosted.com with ESMTP id 270vsg7pae-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 28 Nov 2016 19:43:25 -0500 Received: from localhost by e17.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 28 Nov 2016 19:43:24 -0500 From: Uma Krishnan To: linux-scsi@vger.kernel.org, James Bottomley , "Martin K. Petersen" , "Matthew R. Ochs" , "Manoj N. Kumar" Cc: Brian King , linuxppc-dev@lists.ozlabs.org, Ian Munsie , Andrew Donnellan , Frederic Barrat , Christophe Lombard Subject: [PATCH v2 14/14] cxlflash: Migrate scsi command pointer to AFU command Date: Mon, 28 Nov 2016 18:43:18 -0600 In-Reply-To: <1480379984-60114-1-git-send-email-ukrishn@linux.vnet.ibm.com> References: <1480379984-60114-1-git-send-email-ukrishn@linux.vnet.ibm.com> Message-Id: <1480380198-60687-1-git-send-email-ukrishn@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: "Matthew R. Ochs" Currently, when sending a SCSI command, the pointer is stored in a reserved field of the AFU command descriptor for retrieval once the SCSI command has completed. In order to support new descriptor formats that make use of the reserved field, the pointer is migrated to outside the descriptor where it can still be found during completion processing. Signed-off-by: Matthew R. Ochs --- drivers/scsi/cxlflash/common.h | 1 + drivers/scsi/cxlflash/main.c | 10 +++++----- drivers/scsi/cxlflash/sislite.h | 2 +- 3 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h index 6b8d1d3..0e9de5d 100644 --- a/drivers/scsi/cxlflash/common.h +++ b/drivers/scsi/cxlflash/common.h @@ -129,6 +129,7 @@ struct afu_cmd { struct sisl_ioarcb rcb; /* IOARCB (cache line aligned) */ struct sisl_ioasa sa; /* IOASA must follow IOARCB */ struct afu *parent; + struct scsi_cmnd *scp; struct completion cevent; u8 cmd_tmf:1; diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c index d2d2d83..b17ebf6 100644 --- a/drivers/scsi/cxlflash/main.c +++ b/drivers/scsi/cxlflash/main.c @@ -151,7 +151,7 @@ static void process_cmd_err(struct afu_cmd *cmd, struct scsi_cmnd *scp) * * Prepares and submits command that has either completed or timed out to * the SCSI stack. Checks AFU command back into command pool for non-internal - * (rcb.scp populated) commands. + * (cmd->scp populated) commands. */ static void cmd_complete(struct afu_cmd *cmd) { @@ -161,8 +161,8 @@ static void cmd_complete(struct afu_cmd *cmd) struct cxlflash_cfg *cfg = afu->parent; bool cmd_is_tmf; - if (cmd->rcb.scp) { - scp = cmd->rcb.scp; + if (cmd->scp) { + scp = cmd->scp; if (unlikely(cmd->sa.ioasc)) process_cmd_err(cmd, scp); else @@ -315,7 +315,7 @@ static int send_tmf(struct afu *afu, struct scsi_cmnd *scp, u64 tmfcmd) cfg->tmf_active = true; spin_unlock_irqrestore(&cfg->tmf_slock, lock_flags); - cmd->rcb.scp = scp; + cmd->scp = scp; cmd->parent = afu; cmd->cmd_tmf = true; @@ -445,7 +445,7 @@ static int cxlflash_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scp) cmd->rcb.data_ea = sg_dma_address(sg); } - cmd->rcb.scp = scp; + cmd->scp = scp; cmd->parent = afu; cmd->rcb.ctx_id = afu->ctx_hndl; diff --git a/drivers/scsi/cxlflash/sislite.h b/drivers/scsi/cxlflash/sislite.h index 347fc16..1a2d09c 100644 --- a/drivers/scsi/cxlflash/sislite.h +++ b/drivers/scsi/cxlflash/sislite.h @@ -72,7 +72,7 @@ struct sisl_ioarcb { u16 timeout; /* in units specified by req_flags */ u32 rsvd1; u8 cdb[16]; /* must be in big endian */ - struct scsi_cmnd *scp; + u64 reserved; /* Reserved area */ } __packed; struct sisl_rc { -- 2.1.0