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Date: Fri, 14 Jun 2019 06:05:33 +0900 From: Minwoo Im <minwoo.im.dev@...il.com> To: Minwoo Im <minwoo.im@...sung.com> Cc: "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "MPT-FusionLinux.pdl@...adcom.com" <MPT-FusionLinux.pdl@...adcom.com>, "sathya.prakash@...adcom.com" <sathya.prakash@...adcom.com>, "chaitra.basappa@...adcom.com" <chaitra.basappa@...adcom.com>, "suganath-prabu.subramani@...adcom.com" <suganath-prabu.subramani@...adcom.com>, "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>, "martin.petersen@...cle.com" <martin.petersen@...cle.com>, Sarah Cho <sohyeon.jo@...sung.com>, Sungjun Park <sj1228.park@...sung.com>, Gyeongmin Nam <gm.nam@...sung.com>, Sanggwan Lee <sanggwan.lee@...sung.com> Subject: Re: [RFC PATCH] mpt3sas: support target smid for [abort|query] task On 19-06-13 16:54:02, Minwoo Im wrote: > We can request task management IOCTL command(MPI2_FUNCTION_SCSI_TASK_MGMT) > to /dev/mpt3ctl. If the given task_type is either abort task or query > task, it may need a field named "Initiator Port Transfer Tag to Manage" > in the IU. > > Current code does not support to check target IPTT tag from the > tm_request. This patch introduces to check TaskMID given from the > userspace as a target tag. We have a rule of relationship between > (struct request *req->tag) and smid in mpt3sas_base.c: > > 3318 u16 > 3319 mpt3sas_base_get_smid_scsiio(struct MPT3SAS_ADAPTER *ioc, u8 cb_idx, > 3320 struct scsi_cmnd *scmd) > 3321 { > 3322 struct scsiio_tracker *request = scsi_cmd_priv(scmd); > 3323 unsigned int tag = scmd->request->tag; > 3324 u16 smid; > 3325 > 3326 smid = tag + 1; > > So if we want to abort a request tagged #X, then we can pass (X + 1) to > this IOCTL handler. > > Signed-off-by: Minwoo Im <minwoo.im@...sung.com> > --- Sorry for the duplicated patches on the same mailing list. Please ignore the first two of it. Thanks,
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