From patchwork Fri Jan 13 08:05:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 9514797 X-Patchwork-Delegate: bhelgaas@google.com 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 6B5056077E for ; Fri, 13 Jan 2017 08:05:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 608012836F for ; Fri, 13 Jan 2017 08:05:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5224B28658; Fri, 13 Jan 2017 08:05:58 +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=ham 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 70C942836F for ; Fri, 13 Jan 2017 08:05:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751197AbdAMIF4 (ORCPT ); Fri, 13 Jan 2017 03:05:56 -0500 Received: from verein.lst.de ([213.95.11.211]:53761 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751167AbdAMIFz (ORCPT ); Fri, 13 Jan 2017 03:05:55 -0500 Received: by newverein.lst.de (Postfix, from userid 2407) id 70E2268DD7; Fri, 13 Jan 2017 09:05:53 +0100 (CET) Date: Fri, 13 Jan 2017 09:05:53 +0100 From: Christoph Hellwig To: Bjorn Helgaas Cc: Christoph Hellwig , linux-pci@vger.kernel.org, Mauro Carvalho Chehab , netdev@vger.kernel.org, linux-media@vger.kernel.org, Tom Lendacky Subject: Re: kill off pci_enable_msi_{exact,range} Message-ID: <20170113080553.GA26280@lst.de> References: <1483994260-19797-1-git-send-email-hch@lst.de> <20170112212900.GE8312@bhelgaas-glaptop.roam.corp.google.com> <20170113075503.GA26014@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20170113075503.GA26014@lst.de> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On Fri, Jan 13, 2017 at 08:55:03AM +0100, Christoph Hellwig wrote: > On Thu, Jan 12, 2017 at 03:29:00PM -0600, Bjorn Helgaas wrote: > > Applied all three (with Tom's ack on the amd-xgbe patch) to pci/msi for > > v4.11, thanks! > > Tom had just send me an event better version of the xgbe patch. Tom, > maybe you can resend that relative to the PCI tree [1], so that we don't > lose it for next merge window? Actually - Bjorn, your msi branch contains an empty commit from this thread: https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?h=pci/msi&id=7a8191de43faa9869b421a1b06075d8126ce7c0b Maybe we should rebase it after all to avoid that? In that case please pick up the xgbe patch from Tom below: --- From: Tom Lendacky Subject: [PATCH] amd-xgbe: Update PCI support to use new IRQ functions Some of the PCI MSI/MSI-X functions have been deprecated and it is recommended to use the new pci_alloc_irq_vectors() function. Convert the code over to use the new function. Also, modify the way in which the IRQs are requested - try for multiple MSI-X/MSI first, then a single MSI/legacy interrupt. Signed-off-by: Tom Lendacky Signed-off-by: Christoph Hellwig --- drivers/net/ethernet/amd/xgbe/xgbe-pci.c | 128 +++++++++--------------------- drivers/net/ethernet/amd/xgbe/xgbe.h | 8 +- 2 files changed, 41 insertions(+), 95 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-pci.c b/drivers/net/ethernet/amd/xgbe/xgbe-pci.c index e76b7f6..e436902 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-pci.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-pci.c @@ -122,104 +122,40 @@ #include "xgbe.h" #include "xgbe-common.h" -static int xgbe_config_msi(struct xgbe_prv_data *pdata) +static int xgbe_config_multi_msi(struct xgbe_prv_data *pdata) { - unsigned int msi_count; + unsigned int vector_count; unsigned int i, j; int ret; - msi_count = XGBE_MSIX_BASE_COUNT; - msi_count += max(pdata->rx_ring_count, - pdata->tx_ring_count); - msi_count = roundup_pow_of_two(msi_count); + vector_count = XGBE_MSI_BASE_COUNT; + vector_count += max(pdata->rx_ring_count, + pdata->tx_ring_count); - ret = pci_enable_msi_exact(pdata->pcidev, msi_count); + ret = pci_alloc_irq_vectors(pdata->pcidev, XGBE_MSI_MIN_COUNT, + vector_count, PCI_IRQ_MSI | PCI_IRQ_MSIX); if (ret < 0) { - dev_info(pdata->dev, "MSI request for %u interrupts failed\n", - msi_count); - - ret = pci_enable_msi(pdata->pcidev); - if (ret < 0) { - dev_info(pdata->dev, "MSI enablement failed\n"); - return ret; - } - - msi_count = 1; - } - - pdata->irq_count = msi_count; - - pdata->dev_irq = pdata->pcidev->irq; - - if (msi_count > 1) { - pdata->ecc_irq = pdata->pcidev->irq + 1; - pdata->i2c_irq = pdata->pcidev->irq + 2; - pdata->an_irq = pdata->pcidev->irq + 3; - - for (i = XGBE_MSIX_BASE_COUNT, j = 0; - (i < msi_count) && (j < XGBE_MAX_DMA_CHANNELS); - i++, j++) - pdata->channel_irq[j] = pdata->pcidev->irq + i; - pdata->channel_irq_count = j; - - pdata->per_channel_irq = 1; - pdata->channel_irq_mode = XGBE_IRQ_MODE_LEVEL; - } else { - pdata->ecc_irq = pdata->pcidev->irq; - pdata->i2c_irq = pdata->pcidev->irq; - pdata->an_irq = pdata->pcidev->irq; - } - - if (netif_msg_probe(pdata)) - dev_dbg(pdata->dev, "MSI interrupts enabled\n"); - - return 0; -} - -static int xgbe_config_msix(struct xgbe_prv_data *pdata) -{ - unsigned int msix_count; - unsigned int i, j; - int ret; - - msix_count = XGBE_MSIX_BASE_COUNT; - msix_count += max(pdata->rx_ring_count, - pdata->tx_ring_count); - - pdata->msix_entries = devm_kcalloc(pdata->dev, msix_count, - sizeof(struct msix_entry), - GFP_KERNEL); - if (!pdata->msix_entries) - return -ENOMEM; - - for (i = 0; i < msix_count; i++) - pdata->msix_entries[i].entry = i; - - ret = pci_enable_msix_range(pdata->pcidev, pdata->msix_entries, - XGBE_MSIX_MIN_COUNT, msix_count); - if (ret < 0) { - dev_info(pdata->dev, "MSI-X enablement failed\n"); - devm_kfree(pdata->dev, pdata->msix_entries); - pdata->msix_entries = NULL; + dev_info(pdata->dev, "multi MSI/MSI-X enablement failed\n"); return ret; } pdata->irq_count = ret; - pdata->dev_irq = pdata->msix_entries[0].vector; - pdata->ecc_irq = pdata->msix_entries[1].vector; - pdata->i2c_irq = pdata->msix_entries[2].vector; - pdata->an_irq = pdata->msix_entries[3].vector; + pdata->dev_irq = pci_irq_vector(pdata->pcidev, 0); + pdata->ecc_irq = pci_irq_vector(pdata->pcidev, 1); + pdata->i2c_irq = pci_irq_vector(pdata->pcidev, 2); + pdata->an_irq = pci_irq_vector(pdata->pcidev, 3); - for (i = XGBE_MSIX_BASE_COUNT, j = 0; i < ret; i++, j++) - pdata->channel_irq[j] = pdata->msix_entries[i].vector; + for (i = XGBE_MSI_BASE_COUNT, j = 0; i < ret; i++, j++) + pdata->channel_irq[j] = pci_irq_vector(pdata->pcidev, i); pdata->channel_irq_count = j; pdata->per_channel_irq = 1; pdata->channel_irq_mode = XGBE_IRQ_MODE_LEVEL; if (netif_msg_probe(pdata)) - dev_dbg(pdata->dev, "MSI-X interrupts enabled\n"); + dev_dbg(pdata->dev, "multi %s interrupts enabled\n", + pdata->pcidev->msix_enabled ? "MSI-X" : "MSI"); return 0; } @@ -228,21 +164,28 @@ static int xgbe_config_irqs(struct xgbe_prv_data *pdata) { int ret; - ret = xgbe_config_msix(pdata); + ret = xgbe_config_multi_msi(pdata); if (!ret) goto out; - ret = xgbe_config_msi(pdata); - if (!ret) - goto out; + ret = pci_alloc_irq_vectors(pdata->pcidev, 1, 1, + PCI_IRQ_LEGACY | PCI_IRQ_MSI); + if (ret < 0) { + dev_info(pdata->dev, "single IRQ enablement failed\n"); + return ret; + } pdata->irq_count = 1; - pdata->irq_shared = 1; + pdata->channel_irq_count = 1; + + pdata->dev_irq = pci_irq_vector(pdata->pcidev, 0); + pdata->ecc_irq = pci_irq_vector(pdata->pcidev, 0); + pdata->i2c_irq = pci_irq_vector(pdata->pcidev, 0); + pdata->an_irq = pci_irq_vector(pdata->pcidev, 0); - pdata->dev_irq = pdata->pcidev->irq; - pdata->ecc_irq = pdata->pcidev->irq; - pdata->i2c_irq = pdata->pcidev->irq; - pdata->an_irq = pdata->pcidev->irq; + if (netif_msg_probe(pdata)) + dev_dbg(pdata->dev, "single %s interrupt enabled\n", + pdata->pcidev->msi_enabled ? "MSI" : "legacy"); out: if (netif_msg_probe(pdata)) { @@ -412,12 +355,15 @@ static int xgbe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) /* Configure the netdev resource */ ret = xgbe_config_netdev(pdata); if (ret) - goto err_pci_enable; + goto err_irq_vectors; netdev_notice(pdata->netdev, "net device enabled\n"); return 0; +err_irq_vectors: + pci_free_irq_vectors(pdata->pcidev); + err_pci_enable: xgbe_free_pdata(pdata); @@ -433,6 +379,8 @@ static void xgbe_pci_remove(struct pci_dev *pdev) xgbe_deconfig_netdev(pdata); + pci_free_irq_vectors(pdata->pcidev); + xgbe_free_pdata(pdata); } diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h index f52a9bd..99f1c87 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe.h +++ b/drivers/net/ethernet/amd/xgbe/xgbe.h @@ -211,9 +211,9 @@ #define XGBE_MAC_PROP_OFFSET 0x1d000 #define XGBE_I2C_CTRL_OFFSET 0x1e000 -/* PCI MSIx support */ -#define XGBE_MSIX_BASE_COUNT 4 -#define XGBE_MSIX_MIN_COUNT (XGBE_MSIX_BASE_COUNT + 1) +/* PCI MSI/MSIx support */ +#define XGBE_MSI_BASE_COUNT 4 +#define XGBE_MSI_MIN_COUNT (XGBE_MSI_BASE_COUNT + 1) /* PCI clock frequencies */ #define XGBE_V2_DMA_CLOCK_FREQ 500000000 /* 500 MHz */ @@ -980,14 +980,12 @@ struct xgbe_prv_data { unsigned int desc_ded_count; unsigned int desc_sec_count; - struct msix_entry *msix_entries; int dev_irq; int ecc_irq; int i2c_irq; int channel_irq[XGBE_MAX_DMA_CHANNELS]; unsigned int per_channel_irq; - unsigned int irq_shared; unsigned int irq_count; unsigned int channel_irq_count; unsigned int channel_irq_mode;