From mboxrd@z Thu Jan 1 00:00:00 1970 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 A4758C7618A for ; Mon, 20 Mar 2023 00:56:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230157AbjCTA4T (ORCPT ); Sun, 19 Mar 2023 20:56:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230031AbjCTAzu (ORCPT ); Sun, 19 Mar 2023 20:55:50 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13A193A9E; Sun, 19 Mar 2023 17:54:36 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 95DE9CE1011; Mon, 20 Mar 2023 00:53:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88FE0C433EF; Mon, 20 Mar 2023 00:53:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679273619; bh=WzWlooNL+youDZAqH1zIuGXudHT3njW4GJcNY/hn40k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ODVNXu3+42eEsMyt3qKVeMAH4ih/ElO2b+dGjX3oEQowopSLKsj8GzQkCXplVI2+d WKJNpiK11OqI8Csc4KmtCMD7fMWTuULaCcbaZTWCULVKGpINlLvnEDGP2OZxOYVTp1 TRyrBs9UxcGhA2ewPNhZNevpY+7CZddbtJiNSgvoqJ62oXwdocfT/tTPKNOk7hMD2D UNfoTyUiRKH03GK2YLgfxNgC6gm7CjDasvu1cubc8SiD+48VRjl0Qxqo4G6Ew4CTyo 1w9U3OKE0TnuKN0RopiD0KLOWk7UyZ7TjJ3vHN4CclKKILRoelcJt9cSktDSWidL4o VT05v0S0MQE+A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ranjan Kumar , Sreekanth Reddy , "Martin K . Petersen" , Sasha Levin , sathya.prakash@broadcom.com, kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, jejb@linux.ibm.com, mpi3mr-linuxdrv.pdl@broadcom.com, linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 6.2 16/30] scsi: mpi3mr: ioctl timeout when disabling/enabling interrupt Date: Sun, 19 Mar 2023 20:52:41 -0400 Message-Id: <20230320005258.1428043-16-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230320005258.1428043-1-sashal@kernel.org> References: <20230320005258.1428043-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ranjan Kumar [ Upstream commit 02ca7da2919ada525fb424640205110e24646b50 ] As part of Task Management handling, the driver will disable and enable the MSIx index zero which belongs to the Admin reply queue. During this transition the driver loses some interrupts and this leads to Admin request and ioctl timeouts. After enabling the interrupts, poll the Admin reply queue to avoid timeouts. Signed-off-by: Ranjan Kumar Signed-off-by: Sreekanth Reddy Link: https://lore.kernel.org/r/20230228140835.4075-2-ranjan.kumar@broadcom.com Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/mpi3mr/mpi3mr.h | 3 +++ drivers/scsi/mpi3mr/mpi3mr_fw.c | 12 ++++++++++-- drivers/scsi/mpi3mr/mpi3mr_os.c | 1 + 3 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h index 8a438f248a820..68f29ffb05b82 100644 --- a/drivers/scsi/mpi3mr/mpi3mr.h +++ b/drivers/scsi/mpi3mr/mpi3mr.h @@ -903,6 +903,7 @@ struct scmd_priv { * @admin_reply_ephase:Admin reply queue expected phase * @admin_reply_base: Admin reply queue base virtual address * @admin_reply_dma: Admin reply queue base dma address + * @admin_reply_q_in_use: Queue is handled by poll/ISR * @ready_timeout: Controller ready timeout * @intr_info: Interrupt cookie pointer * @intr_info_count: Number of interrupt cookies @@ -1056,6 +1057,7 @@ struct mpi3mr_ioc { u8 admin_reply_ephase; void *admin_reply_base; dma_addr_t admin_reply_dma; + atomic_t admin_reply_q_in_use; u32 ready_timeout; @@ -1391,4 +1393,5 @@ void mpi3mr_add_event_wait_for_device_refresh(struct mpi3mr_ioc *mrioc); void mpi3mr_flush_drv_cmds(struct mpi3mr_ioc *mrioc); void mpi3mr_flush_cmds_for_unrecovered_controller(struct mpi3mr_ioc *mrioc); void mpi3mr_free_enclosure_list(struct mpi3mr_ioc *mrioc); +int mpi3mr_process_admin_reply_q(struct mpi3mr_ioc *mrioc); #endif /*MPI3MR_H_INCLUDED*/ diff --git a/drivers/scsi/mpi3mr/mpi3mr_fw.c b/drivers/scsi/mpi3mr/mpi3mr_fw.c index 758f7ca9e0ee8..4254e46a20f1a 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_fw.c +++ b/drivers/scsi/mpi3mr/mpi3mr_fw.c @@ -415,7 +415,7 @@ static void mpi3mr_process_admin_reply_desc(struct mpi3mr_ioc *mrioc, le64_to_cpu(scsi_reply->sense_data_buffer_address)); } -static int mpi3mr_process_admin_reply_q(struct mpi3mr_ioc *mrioc) +int mpi3mr_process_admin_reply_q(struct mpi3mr_ioc *mrioc) { u32 exp_phase = mrioc->admin_reply_ephase; u32 admin_reply_ci = mrioc->admin_reply_ci; @@ -423,12 +423,17 @@ static int mpi3mr_process_admin_reply_q(struct mpi3mr_ioc *mrioc) u64 reply_dma = 0; struct mpi3_default_reply_descriptor *reply_desc; + if (!atomic_add_unless(&mrioc->admin_reply_q_in_use, 1, 1)) + return 0; + reply_desc = (struct mpi3_default_reply_descriptor *)mrioc->admin_reply_base + admin_reply_ci; if ((le16_to_cpu(reply_desc->reply_flags) & - MPI3_REPLY_DESCRIPT_FLAGS_PHASE_MASK) != exp_phase) + MPI3_REPLY_DESCRIPT_FLAGS_PHASE_MASK) != exp_phase) { + atomic_dec(&mrioc->admin_reply_q_in_use); return 0; + } do { if (mrioc->unrecoverable) @@ -454,6 +459,7 @@ static int mpi3mr_process_admin_reply_q(struct mpi3mr_ioc *mrioc) writel(admin_reply_ci, &mrioc->sysif_regs->admin_reply_queue_ci); mrioc->admin_reply_ci = admin_reply_ci; mrioc->admin_reply_ephase = exp_phase; + atomic_dec(&mrioc->admin_reply_q_in_use); return num_admin_replies; } @@ -2605,6 +2611,7 @@ static int mpi3mr_setup_admin_qpair(struct mpi3mr_ioc *mrioc) mrioc->admin_reply_ci = 0; mrioc->admin_reply_ephase = 1; mrioc->admin_reply_base = NULL; + atomic_set(&mrioc->admin_reply_q_in_use, 0); if (!mrioc->admin_req_base) { mrioc->admin_req_base = dma_alloc_coherent(&mrioc->pdev->dev, @@ -4155,6 +4162,7 @@ void mpi3mr_memset_buffers(struct mpi3mr_ioc *mrioc) memset(mrioc->admin_req_base, 0, mrioc->admin_req_q_sz); if (mrioc->admin_reply_base) memset(mrioc->admin_reply_base, 0, mrioc->admin_reply_q_sz); + atomic_set(&mrioc->admin_reply_q_in_use, 0); if (mrioc->init_cmds.reply) { memset(mrioc->init_cmds.reply, 0, sizeof(*mrioc->init_cmds.reply)); diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c index 6eaeba41072cb..a794cc8a1c0b1 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -3720,6 +3720,7 @@ int mpi3mr_issue_tm(struct mpi3mr_ioc *mrioc, u8 tm_type, mpi3mr_poll_pend_io_completions(mrioc); mpi3mr_ioc_enable_intr(mrioc); mpi3mr_poll_pend_io_completions(mrioc); + mpi3mr_process_admin_reply_q(mrioc); } switch (tm_type) { case MPI3_SCSITASKMGMT_TASKTYPE_TARGET_RESET: -- 2.39.2