From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f46.google.com ([209.85.220.46]:43831 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752326AbbBXIdy (ORCPT ); Tue, 24 Feb 2015 03:33:54 -0500 Received: by paceu11 with SMTP id eu11so34339225pac.10 for ; Tue, 24 Feb 2015 00:33:54 -0800 (PST) Subject: [PATCH v12 08/21] PCI: Add pcibios_sriov_enable() and pcibios_sriov_disable() To: Wei Yang , benh@au1.ibm.com, gwshan@linux.vnet.ibm.com From: Bjorn Helgaas Cc: linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Tue, 24 Feb 2015 02:33:52 -0600 Message-ID: <20150224083352.32124.63952.stgit@bhelgaas-glaptop2.roam.corp.google.com> In-Reply-To: <20150224082939.32124.45744.stgit@bhelgaas-glaptop2.roam.corp.google.com> References: <20150224082939.32124.45744.stgit@bhelgaas-glaptop2.roam.corp.google.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-pci-owner@vger.kernel.org List-ID: From: Wei Yang VFs are dynamically created when a driver enables them. On some platforms, like PowerNV, special resources are necessary to enable VFs. Add platform hooks for enabling and disabling VFs. Signed-off-by: Wei Yang Signed-off-by: Bjorn Helgaas --- drivers/pci/iov.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 5643a1011e23..cc6fedf4a1b9 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -220,6 +220,11 @@ static void virtfn_remove(struct pci_dev *dev, int id, int reset) pci_dev_put(dev); } +int __weak pcibios_sriov_enable(struct pci_dev *pdev, u16 vf_num) +{ + return 0; +} + static int sriov_enable(struct pci_dev *dev, int nr_virtfn) { int rc; @@ -231,6 +236,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) struct pci_sriov *iov = dev->sriov; int bars = 0; int bus; + int retval; if (!nr_virtfn) return 0; @@ -307,6 +313,12 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) if (nr_virtfn < initial) initial = nr_virtfn; + if ((retval = pcibios_sriov_enable(dev, initial))) { + dev_err(&dev->dev, "failure %d from pcibios_sriov_enable()\n", + retval); + return retval; + } + for (i = 0; i < initial; i++) { rc = virtfn_add(dev, i, 0); if (rc) @@ -335,6 +347,11 @@ failed: return rc; } +int __weak pcibios_sriov_disable(struct pci_dev *pdev) +{ + return 0; +} + static void sriov_disable(struct pci_dev *dev) { int i; @@ -346,6 +363,8 @@ static void sriov_disable(struct pci_dev *dev) for (i = 0; i < iov->num_VFs; i++) virtfn_remove(dev, i, 0); + pcibios_sriov_disable(dev); + iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE); pci_cfg_access_lock(dev); pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);