From patchwork Mon May 17 14:01:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 440778 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4F01C433ED for ; Mon, 17 May 2021 15:06:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A72036108D for ; Mon, 17 May 2021 15:06:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242688AbhEQPHc (ORCPT ); Mon, 17 May 2021 11:07:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:49854 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241393AbhEQPFb (ORCPT ); Mon, 17 May 2021 11:05:31 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3351F61628; Mon, 17 May 2021 14:28:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621261730; bh=i/Jqc1TDop8tdAZ1RtNPv6dz1tvWgmmBg3wQcFM+xv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G4464s+q/XMBYnk+DU2Z2S0o5QrcXGP9gN4EjBvT5w5JVcN8gIp2ydzSBU8567IZL Ubr+NmfCtBI/73C+xz7cAbF8D9eYP2j14zzMjLkYyWNcnwFl8LC46yAAUGwSp8Dm4C jmcfff/l9WN73WBqICIJMiLMYE2bFEu+nK/R7kF8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jason Gunthorpe , Dave Jiang , Dan Williams , Vinod Koul , Sasha Levin Subject: [PATCH 5.11 156/329] dmaengine: idxd: cleanup pci interrupt vector allocation management Date: Mon, 17 May 2021 16:01:07 +0200 Message-Id: <20210517140307.385361262@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210517140302.043055203@linuxfoundation.org> References: <20210517140302.043055203@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dave Jiang [ Upstream commit 5fc8e85ff12ce0530ac658686902a0ee64600f56 ] The devm managed lifetime is incompatible with 'struct device' objects that resides in idxd context. This is one of the series that clean up the idxd driver 'struct device' lifetime. Remove devm managed pci interrupt vectors and replace with unmanged allocators. Reported-by: Jason Gunthorpe Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators") Signed-off-by: Dave Jiang Reviewed-by: Dan Williams Link: https://lore.kernel.org/r/161852983563.2203940.8116028229124776669.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/idxd/device.c | 4 +-- drivers/dma/idxd/idxd.h | 2 +- drivers/dma/idxd/init.c | 64 +++++++++++++++++---------------------- 3 files changed, 30 insertions(+), 40 deletions(-) diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index d255bb016c4d..3f696abd74ac 100644 --- a/drivers/dma/idxd/device.c +++ b/drivers/dma/idxd/device.c @@ -19,7 +19,7 @@ static void idxd_cmd_exec(struct idxd_device *idxd, int cmd_code, u32 operand, /* Interrupt control bits */ void idxd_mask_msix_vector(struct idxd_device *idxd, int vec_id) { - struct irq_data *data = irq_get_irq_data(idxd->msix_entries[vec_id].vector); + struct irq_data *data = irq_get_irq_data(idxd->irq_entries[vec_id].vector); pci_msi_mask_irq(data); } @@ -36,7 +36,7 @@ void idxd_mask_msix_vectors(struct idxd_device *idxd) void idxd_unmask_msix_vector(struct idxd_device *idxd, int vec_id) { - struct irq_data *data = irq_get_irq_data(idxd->msix_entries[vec_id].vector); + struct irq_data *data = irq_get_irq_data(idxd->irq_entries[vec_id].vector); pci_msi_unmask_irq(data); } diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h index 80e534680c9a..401b035e42b1 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -36,6 +36,7 @@ struct idxd_device_driver { struct idxd_irq_entry { struct idxd_device *idxd; int id; + int vector; struct llist_head pending_llist; struct list_head work_list; /* @@ -219,7 +220,6 @@ struct idxd_device { union sw_err_reg sw_err; wait_queue_head_t cmd_waitq; - struct msix_entry *msix_entries; int num_wq_irqs; struct idxd_irq_entry *irq_entries; diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index 8f3df64aa1be..d54a5e5f82a2 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -57,7 +57,6 @@ static int idxd_setup_interrupts(struct idxd_device *idxd) { struct pci_dev *pdev = idxd->pdev; struct device *dev = &pdev->dev; - struct msix_entry *msix; struct idxd_irq_entry *irq_entry; int i, msixcnt; int rc = 0; @@ -65,23 +64,13 @@ static int idxd_setup_interrupts(struct idxd_device *idxd) msixcnt = pci_msix_vec_count(pdev); if (msixcnt < 0) { dev_err(dev, "Not MSI-X interrupt capable.\n"); - goto err_no_irq; + return -ENOSPC; } - idxd->msix_entries = devm_kzalloc(dev, sizeof(struct msix_entry) * - msixcnt, GFP_KERNEL); - if (!idxd->msix_entries) { - rc = -ENOMEM; - goto err_no_irq; - } - - for (i = 0; i < msixcnt; i++) - idxd->msix_entries[i].entry = i; - - rc = pci_enable_msix_exact(pdev, idxd->msix_entries, msixcnt); - if (rc) { - dev_err(dev, "Failed enabling %d MSIX entries.\n", msixcnt); - goto err_no_irq; + rc = pci_alloc_irq_vectors(pdev, msixcnt, msixcnt, PCI_IRQ_MSIX); + if (rc != msixcnt) { + dev_err(dev, "Failed enabling %d MSIX entries: %d\n", msixcnt, rc); + return -ENOSPC; } dev_dbg(dev, "Enabled %d msix vectors\n", msixcnt); @@ -94,58 +83,57 @@ static int idxd_setup_interrupts(struct idxd_device *idxd) GFP_KERNEL); if (!idxd->irq_entries) { rc = -ENOMEM; - goto err_no_irq; + goto err_irq_entries; } for (i = 0; i < msixcnt; i++) { idxd->irq_entries[i].id = i; idxd->irq_entries[i].idxd = idxd; + idxd->irq_entries[i].vector = pci_irq_vector(pdev, i); spin_lock_init(&idxd->irq_entries[i].list_lock); } - msix = &idxd->msix_entries[0]; irq_entry = &idxd->irq_entries[0]; - rc = devm_request_threaded_irq(dev, msix->vector, idxd_irq_handler, - idxd_misc_thread, 0, "idxd-misc", - irq_entry); + rc = request_threaded_irq(irq_entry->vector, idxd_irq_handler, idxd_misc_thread, + 0, "idxd-misc", irq_entry); if (rc < 0) { dev_err(dev, "Failed to allocate misc interrupt.\n"); - goto err_no_irq; + goto err_misc_irq; } - dev_dbg(dev, "Allocated idxd-misc handler on msix vector %d\n", - msix->vector); + dev_dbg(dev, "Allocated idxd-misc handler on msix vector %d\n", irq_entry->vector); /* first MSI-X entry is not for wq interrupts */ idxd->num_wq_irqs = msixcnt - 1; for (i = 1; i < msixcnt; i++) { - msix = &idxd->msix_entries[i]; irq_entry = &idxd->irq_entries[i]; init_llist_head(&idxd->irq_entries[i].pending_llist); INIT_LIST_HEAD(&idxd->irq_entries[i].work_list); - rc = devm_request_threaded_irq(dev, msix->vector, - idxd_irq_handler, - idxd_wq_thread, 0, - "idxd-portal", irq_entry); + rc = request_threaded_irq(irq_entry->vector, idxd_irq_handler, + idxd_wq_thread, 0, "idxd-portal", irq_entry); if (rc < 0) { - dev_err(dev, "Failed to allocate irq %d.\n", - msix->vector); - goto err_no_irq; + dev_err(dev, "Failed to allocate irq %d.\n", irq_entry->vector); + goto err_wq_irqs; } - dev_dbg(dev, "Allocated idxd-msix %d for vector %d\n", - i, msix->vector); + dev_dbg(dev, "Allocated idxd-msix %d for vector %d\n", i, irq_entry->vector); } idxd_unmask_error_interrupts(idxd); idxd_msix_perm_setup(idxd); return 0; - err_no_irq: + err_wq_irqs: + while (--i >= 0) { + irq_entry = &idxd->irq_entries[i]; + free_irq(irq_entry->vector, irq_entry); + } + err_misc_irq: /* Disable error interrupt generation */ idxd_mask_error_interrupts(idxd); - pci_disable_msix(pdev); + err_irq_entries: + pci_free_irq_vectors(pdev); dev_err(dev, "No usable interrupts\n"); return rc; } @@ -489,7 +477,8 @@ static void idxd_shutdown(struct pci_dev *pdev) for (i = 0; i < msixcnt; i++) { irq_entry = &idxd->irq_entries[i]; - synchronize_irq(idxd->msix_entries[i].vector); + synchronize_irq(irq_entry->vector); + free_irq(irq_entry->vector, irq_entry); if (i == 0) continue; idxd_flush_pending_llist(irq_entry); @@ -497,6 +486,7 @@ static void idxd_shutdown(struct pci_dev *pdev) } idxd_msix_perm_clear(idxd); + pci_free_irq_vectors(pdev); destroy_workqueue(idxd->wq); }