From patchwork Sun Sep 11 13:31:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 9325329 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id F04666077F for ; Sun, 11 Sep 2016 13:33:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E405E28478 for ; Sun, 11 Sep 2016 13:33:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D8AF728BF0; Sun, 11 Sep 2016 13:33:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 49DD628478 for ; Sun, 11 Sep 2016 13:33:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932575AbcIKNbq (ORCPT ); Sun, 11 Sep 2016 09:31:46 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:60107 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932155AbcIKNbm (ORCPT ); Sun, 11 Sep 2016 09:31:42 -0400 Received: from [83.175.99.196] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.85_2 #1 (Red Hat Linux)) id 1bj4rD-00062c-Bl; Sun, 11 Sep 2016 13:31:39 +0000 From: Christoph Hellwig To: hans.verkuil@cisco.com, brking@us.ibm.com, haver@linux.vnet.ibm.com, ching2048@areca.com.tw, axboe@fb.com, alex.williamson@redhat.com Cc: kvm@vger.kernel.org, linux-scsi@vger.kernel.org, linux-block@vger.kernel.org, linux-media@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/6] skd: use pci_alloc_irq_vectors Date: Sun, 11 Sep 2016 15:31:25 +0200 Message-Id: <1473600688-24043-4-git-send-email-hch@lst.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1473600688-24043-1-git-send-email-hch@lst.de> References: <1473600688-24043-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Switch the skd driver to use pci_alloc_irq_vectors. We need to two calls to pci_alloc_irq_vectors as skd only supports multiple MSI-X vectors, but not multiple MSI vectors. Otherwise this cleans up a lot of cruft and allows to a lot more common code. Signed-off-by: Christoph Hellwig --- drivers/block/skd_main.c | 212 +++++++++++++++-------------------------------- 1 file changed, 66 insertions(+), 146 deletions(-) diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c index 3822eae..702f543 100644 --- a/drivers/block/skd_main.c +++ b/drivers/block/skd_main.c @@ -270,8 +270,6 @@ struct skd_device { resource_size_t mem_phys[SKD_MAX_BARS]; u32 mem_size[SKD_MAX_BARS]; - skd_irq_type_t irq_type; - u32 msix_count; struct skd_msix_entry *msix_entries; struct pci_dev *pdev; @@ -3821,10 +3819,6 @@ static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data) */ struct skd_msix_entry { - int have_irq; - u32 vector; - u32 entry; - struct skd_device *rsp; char isr_name[30]; }; @@ -3853,56 +3847,21 @@ static struct skd_init_msix_entry msix_entries[SKD_MAX_MSIX_COUNT] = { { "(Queue Full 3)", skd_qfull_isr }, }; -static void skd_release_msix(struct skd_device *skdev) -{ - struct skd_msix_entry *qentry; - int i; - - if (skdev->msix_entries) { - for (i = 0; i < skdev->msix_count; i++) { - qentry = &skdev->msix_entries[i]; - skdev = qentry->rsp; - - if (qentry->have_irq) - devm_free_irq(&skdev->pdev->dev, - qentry->vector, qentry->rsp); - } - - kfree(skdev->msix_entries); - } - - if (skdev->msix_count) - pci_disable_msix(skdev->pdev); - - skdev->msix_count = 0; - skdev->msix_entries = NULL; -} - static int skd_acquire_msix(struct skd_device *skdev) { int i, rc; struct pci_dev *pdev = skdev->pdev; - struct msix_entry *entries; - struct skd_msix_entry *qentry; - - entries = kzalloc(sizeof(struct msix_entry) * SKD_MAX_MSIX_COUNT, - GFP_KERNEL); - if (!entries) - return -ENOMEM; - for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) - entries[i].entry = i; - - rc = pci_enable_msix_exact(pdev, entries, SKD_MAX_MSIX_COUNT); - if (rc) { + rc = pci_alloc_irq_vectors(pdev, SKD_MAX_MSIX_COUNT, SKD_MAX_MSIX_COUNT, + PCI_IRQ_MSIX); + if (rc < 0) { pr_err("(%s): failed to enable MSI-X %d\n", skd_name(skdev), rc); goto msix_out; } - skdev->msix_count = SKD_MAX_MSIX_COUNT; - skdev->msix_entries = kzalloc(sizeof(struct skd_msix_entry) * - skdev->msix_count, GFP_KERNEL); + skdev->msix_entries = kcalloc(SKD_MAX_MSIX_COUNT, + sizeof(struct skd_msix_entry), GFP_KERNEL); if (!skdev->msix_entries) { rc = -ENOMEM; pr_err("(%s): msix table allocation error\n", @@ -3910,136 +3869,98 @@ static int skd_acquire_msix(struct skd_device *skdev) goto msix_out; } - for (i = 0; i < skdev->msix_count; i++) { - qentry = &skdev->msix_entries[i]; - qentry->vector = entries[i].vector; - qentry->entry = entries[i].entry; - qentry->rsp = NULL; - qentry->have_irq = 0; - pr_debug("%s:%s:%d %s: <%s> msix (%d) vec %d, entry %x\n", - skdev->name, __func__, __LINE__, - pci_name(pdev), skdev->name, - i, qentry->vector, qentry->entry); - } - /* Enable MSI-X vectors for the base queue */ - for (i = 0; i < skdev->msix_count; i++) { - qentry = &skdev->msix_entries[i]; + for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) { + struct skd_msix_entry *qentry = &skdev->msix_entries[i]; + snprintf(qentry->isr_name, sizeof(qentry->isr_name), "%s%d-msix %s", DRV_NAME, skdev->devno, msix_entries[i].name); - rc = devm_request_irq(&skdev->pdev->dev, qentry->vector, - msix_entries[i].handler, 0, - qentry->isr_name, skdev); + + rc = devm_request_irq(&skdev->pdev->dev, + pci_irq_vector(skdev->pdev, i), + msix_entries[i].handler, 0, + qentry->isr_name, skdev); if (rc) { pr_err("(%s): Unable to register(%d) MSI-X " "handler %d: %s\n", skd_name(skdev), rc, i, qentry->isr_name); goto msix_out; - } else { - qentry->have_irq = 1; - qentry->rsp = skdev; } } + pr_debug("%s:%s:%d %s: <%s> msix %d irq(s) enabled\n", skdev->name, __func__, __LINE__, - pci_name(pdev), skdev->name, skdev->msix_count); + pci_name(pdev), skdev->name, SKD_MAX_MSIX_COUNT); return 0; msix_out: - if (entries) - kfree(entries); - skd_release_msix(skdev); + while (--i >= 0) + devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), skdev); + kfree(skdev->msix_entries); + skdev->msix_entries = NULL; return rc; } static int skd_acquire_irq(struct skd_device *skdev) { + struct pci_dev *pdev = skdev->pdev; + unsigned int irq_flag = PCI_IRQ_LEGACY; int rc; - struct pci_dev *pdev; - pdev = skdev->pdev; - skdev->msix_count = 0; - -RETRY_IRQ_TYPE: - switch (skdev->irq_type) { - case SKD_IRQ_MSIX: + if (skd_isr_type == SKD_IRQ_MSIX) { rc = skd_acquire_msix(skdev); if (!rc) - pr_info("(%s): MSI-X %d irqs enabled\n", - skd_name(skdev), skdev->msix_count); - else { - pr_err( - "(%s): failed to enable MSI-X, re-trying with MSI %d\n", - skd_name(skdev), rc); - skdev->irq_type = SKD_IRQ_MSI; - goto RETRY_IRQ_TYPE; - } - break; - case SKD_IRQ_MSI: - snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d-msi", - DRV_NAME, skdev->devno); - rc = pci_enable_msi_range(pdev, 1, 1); - if (rc > 0) { - rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, 0, - skdev->isr_name, skdev); - if (rc) { - pci_disable_msi(pdev); - pr_err( - "(%s): failed to allocate the MSI interrupt %d\n", - skd_name(skdev), rc); - goto RETRY_IRQ_LEGACY; - } - pr_info("(%s): MSI irq %d enabled\n", - skd_name(skdev), pdev->irq); - } else { -RETRY_IRQ_LEGACY: - pr_err( - "(%s): failed to enable MSI, re-trying with LEGACY %d\n", - skd_name(skdev), rc); - skdev->irq_type = SKD_IRQ_LEGACY; - goto RETRY_IRQ_TYPE; - } - break; - case SKD_IRQ_LEGACY: - snprintf(skdev->isr_name, sizeof(skdev->isr_name), - "%s%d-legacy", DRV_NAME, skdev->devno); - rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, - IRQF_SHARED, skdev->isr_name, skdev); - if (!rc) - pr_info("(%s): LEGACY irq %d enabled\n", - skd_name(skdev), pdev->irq); - else - pr_err("(%s): request LEGACY irq error %d\n", - skd_name(skdev), rc); - break; - default: - pr_info("(%s): irq_type %d invalid, re-set to %d\n", - skd_name(skdev), skdev->irq_type, SKD_IRQ_DEFAULT); - skdev->irq_type = SKD_IRQ_LEGACY; - goto RETRY_IRQ_TYPE; + return 0; + + pr_err("(%s): failed to enable MSI-X, re-trying with MSI %d\n", + skd_name(skdev), rc); } - return rc; + + snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d", DRV_NAME, + skdev->devno); + + if (skd_isr_type != SKD_IRQ_LEGACY) + irq_flag |= PCI_IRQ_MSI; + rc = pci_alloc_irq_vectors(pdev, 1, 1, irq_flag); + if (rc < 0) { + pr_err("(%s): failed to allocate the MSI interrupt %d\n", + skd_name(skdev), rc); + return rc; + } + + rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, + pdev->msi_enabled ? 0 : IRQF_SHARED, + skdev->isr_name, skdev); + if (rc) { + pci_free_irq_vectors(pdev); + pr_err("(%s): failed to allocate interrupt %d\n", + skd_name(skdev), rc); + return rc; + } + + return 0; } static void skd_release_irq(struct skd_device *skdev) { - switch (skdev->irq_type) { - case SKD_IRQ_MSIX: - skd_release_msix(skdev); - break; - case SKD_IRQ_MSI: - devm_free_irq(&skdev->pdev->dev, skdev->pdev->irq, skdev); - pci_disable_msi(skdev->pdev); - break; - case SKD_IRQ_LEGACY: - devm_free_irq(&skdev->pdev->dev, skdev->pdev->irq, skdev); - break; - default: - pr_err("(%s): wrong irq type %d!", - skd_name(skdev), skdev->irq_type); - break; + struct pci_dev *pdev = skdev->pdev; + + if (skdev->msix_entries) { + int i; + + for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) { + devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), + skdev); + } + + kfree(skdev->msix_entries); + skdev->msix_entries = NULL; + } else { + devm_free_irq(&pdev->dev, pdev->irq, skdev); } + + pci_free_irq_vectors(pdev); } /* @@ -4402,7 +4323,6 @@ static struct skd_device *skd_construct(struct pci_dev *pdev) skdev->pdev = pdev; skdev->devno = skd_next_devno++; skdev->major = blk_major; - skdev->irq_type = skd_isr_type; sprintf(skdev->name, DRV_NAME "%d", skdev->devno); skdev->dev_max_queue_depth = 0;