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From: Dongdong Liu <liudongdong3@huawei.com>
To: <helgaas@kernel.org>, <linux-pci@vger.kernel.org>
Subject: [RFC PATCH 3/3] PCI/IOV: Enable 10-bit tags support for PCIe VF devices
Date: Sat, 9 Jan 2021 17:11:23 +0800	[thread overview]
Message-ID: <1610183483-2061-4-git-send-email-liudongdong3@huawei.com> (raw)
In-Reply-To: <1610183483-2061-1-git-send-email-liudongdong3@huawei.com>

Enable VF 10-Bit Tag Requester when it's upstream component support
10-bit Tag Completer.

Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
---
 drivers/pci/iov.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 4afd4ee..9bff76b 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -537,6 +537,10 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
 
 	pci_iov_set_numvfs(dev, nr_virtfn);
 	iov->ctrl |= PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE;
+	if ((iov->cap & PCI_SRIOV_CAP_VF_10BIT_TAG_REQ) &&
+	    dev->ext_10bit_tag_comp_path)
+		iov->ctrl |= PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN;
+
 	pci_cfg_access_lock(dev);
 	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
 	msleep(100);
@@ -553,6 +557,8 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
 
 err_pcibios:
 	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
+	if (iov->ctrl & PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN)
+		iov->ctrl &= ~PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN;
 	pci_cfg_access_lock(dev);
 	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
 	ssleep(1);
@@ -585,6 +591,8 @@ static void sriov_disable(struct pci_dev *dev)
 
 	sriov_del_vfs(dev);
 	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
+	if (iov->ctrl & PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN)
+		iov->ctrl &= ~PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN;
 	pci_cfg_access_lock(dev);
 	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
 	ssleep(1);
-- 
1.9.1


  parent reply	other threads:[~2021-01-09  9:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-09  9:11 [RFC PATCH 0/3] PCI: Enable 10-bit tags support for PCIe devices Dongdong Liu
2021-01-09  9:11 ` [RFC PATCH 1/3] PCI: Add 10-Bit Tag register definitions Dongdong Liu
2021-01-09  9:11 ` [RFC PATCH 2/3] PCI: Enable 10-bit tags support for PCIe devices Dongdong Liu
2021-01-09  9:11 ` Dongdong Liu [this message]
2021-02-09 13:18 ` [RFC PATCH 0/3] " Dongdong Liu

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