From patchwork Mon May 2 21:54:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 12834806 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10534C433F5 for ; Mon, 2 May 2022 21:54:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241907AbiEBV6G (ORCPT ); Mon, 2 May 2022 17:58:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1387808AbiEBV5z (ORCPT ); Mon, 2 May 2022 17:57:55 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86C06FD24 for ; Mon, 2 May 2022 14:54:24 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id B3A1F1F899; Mon, 2 May 2022 21:54:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1651528460; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fU2eeqadf72NQOyzHys2QmG3XVR0slnd0zlUuAkSDiI=; b=hMXkPKs5rgn+K7fEYBtSvaTYcKWn1+UwT6t8xA+M8KU/ZJo+C4kz20g5DOG/4IvbIvaR0A R/woE772zFGFIewRJGIjtpK0x17QsJIGQmDmlvu0IWbLyym5wOAeG8zJuLyLKsHTw2Gv05 jTAS7D3UzFRjUrDUMrLvJRh+qXk2618= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1651528460; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fU2eeqadf72NQOyzHys2QmG3XVR0slnd0zlUuAkSDiI=; b=SkS/FyuhcdVN3CT9DMfvVFmavm5WXRhS+H/hX1V3Zu7GLwnGONPTixpkx9tnn6PUpGSry9 qLSCsGYrtGLEdoDw== Received: from adalid.arch.suse.de (adalid.arch.suse.de [10.161.8.13]) by relay2.suse.de (Postfix) with ESMTP id AC0EF2C153; Mon, 2 May 2022 21:54:20 +0000 (UTC) Received: by adalid.arch.suse.de (Postfix, from userid 16045) id A78AE519413C; Mon, 2 May 2022 23:54:20 +0200 (CEST) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , linux-scsi@vger.kernel.org, Hannes Reinecke , Hannes Reinecke Subject: [PATCH 11/11] csiostor: use separate TMF command Date: Mon, 2 May 2022 23:54:16 +0200 Message-Id: <20220502215416.5351-12-hare@suse.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20220502215416.5351-1-hare@suse.de> References: <20220502215416.5351-1-hare@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Set one command aside as a TMF command, and use this command to send the TMF. This avoids having to rely on the passed-in scsi command when resetting the device. Signed-off-by: Hannes Reinecke Reviewed-by: Christoph Hellwig --- drivers/scsi/csiostor/csio_hw.h | 2 ++ drivers/scsi/csiostor/csio_init.c | 2 +- drivers/scsi/csiostor/csio_scsi.c | 48 +++++++++++++++++++------------ 3 files changed, 33 insertions(+), 19 deletions(-) diff --git a/drivers/scsi/csiostor/csio_hw.h b/drivers/scsi/csiostor/csio_hw.h index e351af6e7c81..8e22dccd6d88 100644 --- a/drivers/scsi/csiostor/csio_hw.h +++ b/drivers/scsi/csiostor/csio_hw.h @@ -68,6 +68,8 @@ #define CSIO_MAX_LUN 0xFFFF #define CSIO_MAX_QUEUE 2048 +#define CSIO_TMF_TAG (CSIO_MAX_QUEUE - 1) + #define CSIO_MAX_CMD_PER_LUN 32 #define CSIO_MAX_DDP_BUF_SIZE (1024 * 1024) #define CSIO_MAX_SECTOR_SIZE 128 diff --git a/drivers/scsi/csiostor/csio_init.c b/drivers/scsi/csiostor/csio_init.c index ccbded3353bd..6a5529d6440f 100644 --- a/drivers/scsi/csiostor/csio_init.c +++ b/drivers/scsi/csiostor/csio_init.c @@ -621,7 +621,7 @@ csio_shost_init(struct csio_hw *hw, struct device *dev, /* Link common lnode to this lnode */ ln->dev_num = (shost->host_no << 16); - shost->can_queue = CSIO_MAX_QUEUE; + shost->can_queue = CSIO_MAX_QUEUE - 1; shost->this_id = -1; shost->unique_id = shost->host_no; shost->max_cmd_len = 16; /* Max CDB length supported */ diff --git a/drivers/scsi/csiostor/csio_scsi.c b/drivers/scsi/csiostor/csio_scsi.c index c1c410a1cfe0..b21aa2c43051 100644 --- a/drivers/scsi/csiostor/csio_scsi.c +++ b/drivers/scsi/csiostor/csio_scsi.c @@ -2056,17 +2056,20 @@ csio_tm_cbfn(struct csio_hw *hw, struct csio_ioreq *req) /* Wake up the TM handler thread */ csio_scsi_cmnd(req) = NULL; + cmnd->host_scribble = NULL; } static int csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) { - struct csio_lnode *ln = shost_priv(cmnd->device->host); + struct scsi_device *sdev = cmnd->device; + struct csio_lnode *ln = shost_priv(sdev->host); struct csio_hw *hw = csio_lnode_to_hw(ln); struct csio_scsim *scsim = csio_hw_to_scsim(hw); - struct csio_rnode *rn = (struct csio_rnode *)(cmnd->device->hostdata); + struct csio_rnode *rn = (struct csio_rnode *)(sdev->hostdata); struct csio_ioreq *ioreq = NULL; struct csio_scsi_qset *sqset; + struct scsi_cmnd *tmf_cmnd; unsigned long flags; int retval; int count, ret; @@ -2077,13 +2080,13 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) goto fail; csio_dbg(hw, "Request to reset LUN:%llu (ssni:0x%x tgtid:%d)\n", - cmnd->device->lun, rn->flowid, rn->scsi_id); + sdev->lun, rn->flowid, rn->scsi_id); if (!csio_is_lnode_ready(ln)) { csio_err(hw, "LUN reset cannot be issued on non-ready" " local node vnpi:0x%x (LUN:%llu)\n", - ln->vnp_flowid, cmnd->device->lun); + ln->vnp_flowid, sdev->lun); goto fail; } @@ -2103,7 +2106,15 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) csio_err(hw, "LUN reset cannot be issued on non-ready" " remote node ssni:0x%x (LUN:%llu)\n", - rn->flowid, cmnd->device->lun); + rn->flowid, sdev->lun); + goto fail; + } + + tmf_cmnd = scsi_host_find_tag(sdev->host, CSIO_TMF_TAG); + if (!tmf_cmnd || tmf_cmnd->host_scribble) { + csio_err(hw, + "LUN reset TMF already busy (LUN:%llu)\n", + sdev->lun); goto fail; } @@ -2123,11 +2134,11 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) ioreq->iq_idx = sqset->iq_idx; ioreq->eq_idx = sqset->eq_idx; - csio_scsi_cmnd(ioreq) = cmnd; - cmnd->host_scribble = (unsigned char *)ioreq; - csio_priv(cmnd)->wr_status = 0; + csio_scsi_cmnd(ioreq) = tmf_cmnd; + tmf_cmnd->host_scribble = (unsigned char *)ioreq; + csio_priv(tmf_cmnd)->wr_status = 0; - csio_priv(cmnd)->fc_tm_flags = FCP_TMF_LUN_RESET; + csio_priv(tmf_cmnd)->fc_tm_flags = FCP_TMF_LUN_RESET; ioreq->tmo = CSIO_SCSI_LUNRST_TMO_MS / 1000; /* @@ -2144,7 +2155,7 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) sld.level = CSIO_LEV_LUN; sld.lnode = ioreq->lnode; sld.rnode = ioreq->rnode; - sld.oslun = cmnd->device->lun; + sld.oslun = sdev->lun; spin_lock_irqsave(&hw->lock, flags); /* Kick off TM SM on the ioreq */ @@ -2154,20 +2165,21 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) if (retval != 0) { csio_err(hw, "Failed to issue LUN reset, req:%p, status:%d\n", ioreq, retval); + tmf_cmnd->host_scribble = NULL; goto fail_ret_ioreq; } csio_dbg(hw, "Waiting max %d secs for LUN reset completion\n", count * (CSIO_SCSI_TM_POLL_MS / 1000)); /* Wait for completion */ - while ((((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == cmnd) + while ((((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == tmf_cmnd) && count--) msleep(CSIO_SCSI_TM_POLL_MS); /* LUN reset timed-out */ - if (((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == cmnd) { + if (((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == tmf_cmnd) { csio_err(hw, "LUN reset (%d:%llu) timed out\n", - cmnd->device->id, cmnd->device->lun); + sdev->id, sdev->lun); spin_lock_irq(&hw->lock); csio_scsi_drvcleanup(ioreq); @@ -2178,10 +2190,10 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) } /* LUN reset returned, check cached status */ - if (csio_priv(cmnd)->wr_status != FW_SUCCESS) { + if (csio_priv(tmf_cmnd)->wr_status != FW_SUCCESS) { csio_err(hw, "LUN reset failed (%d:%llu), status: %d\n", - cmnd->device->id, cmnd->device->lun, - csio_priv(cmnd)->wr_status); + sdev->id, sdev->lun, + csio_priv(tmf_cmnd)->wr_status); goto fail; } @@ -2201,7 +2213,7 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) if (retval != 0) { csio_err(hw, "Attempt to abort I/Os during LUN reset of %llu" - " returned %d\n", cmnd->device->lun, retval); + " returned %d\n", sdev->lun, retval); /* Return I/Os back to active_q */ spin_lock_irq(&hw->lock); list_splice_tail_init(&local_q, &scsim->active_q); @@ -2212,7 +2224,7 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) CSIO_INC_STATS(rn, n_lun_rst); csio_info(hw, "LUN reset occurred (%d:%llu)\n", - cmnd->device->id, cmnd->device->lun); + sdev->id, sdev->lun); return SUCCESS;