From: Dongdong Liu <liudongdong3@huawei.com>
To: <helgaas@kernel.org>, <hch@infradead.org>, <kw@linux.com>,
<linux-pci@vger.kernel.org>, <rajur@chelsio.com>,
<hverkuil-cisco@xs4all.nl>
Cc: <linux-media@vger.kernel.org>, <netdev@vger.kernel.org>
Subject: [PATCH V4 5/6] PCI/IOV: Enable 10-Bit tag support for PCIe VF devices
Date: Wed, 16 Jun 2021 11:39:25 +0800 [thread overview]
Message-ID: <1623814766-91906-6-git-send-email-liudongdong3@huawei.com> (raw)
In-Reply-To: <1623814766-91906-1-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>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
drivers/pci/iov.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index afc06e6..3eb4348 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -627,6 +627,10 @@ 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)
+ 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);
@@ -643,6 +647,8 @@ 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);
@@ -675,6 +681,8 @@ 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);
--
2.7.4
next prev parent reply other threads:[~2021-06-16 3:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-16 3:39 [PATCH V4 0/6] PCI: Enable 10-Bit tag support for PCIe devices Dongdong Liu
2021-06-16 3:39 ` [PATCH V4 1/6] PCI: Use cached Device Capabilities Register Dongdong Liu
2021-06-16 3:39 ` [PATCH V4 2/6] PCI: Use cached Device Capabilities 2 Register Dongdong Liu
2021-06-16 3:39 ` [PATCH V4 3/6] PCI: Add 10-Bit Tag register definitions Dongdong Liu
2021-06-16 3:39 ` [PATCH V4 4/6] PCI: Enable 10-Bit tag support for PCIe Endpoint devices Dongdong Liu
2021-06-16 3:39 ` Dongdong Liu [this message]
2021-06-16 3:39 ` [PATCH V4 6/6] PCI: Enable 10-Bit tag support for PCIe RP devices Dongdong Liu
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