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From: Dongdong Liu <liudongdong3@huawei.com>
To: <helgaas@kernel.org>, <hch@infradead.org>, <kw@linux.com>,
	<logang@deltatee.com>, <leon@kernel.org>,
	<linux-pci@vger.kernel.org>, <rajur@chelsio.com>,
	<hverkuil-cisco@xs4all.nl>
Cc: <linux-media@vger.kernel.org>, <netdev@vger.kernel.org>
Subject: [PATCH V9 8/8] PCI/IOV: Enable 10-Bit Tag support for PCIe VF devices
Date: Wed, 22 Sep 2021 21:36:55 +0800	[thread overview]
Message-ID: <20210922133655.51811-9-liudongdong3@huawei.com> (raw)
In-Reply-To: <20210922133655.51811-1-liudongdong3@huawei.com>

Enable 10-Bit Tag Requester for the VF devices below the
Root Port that support 10-Bit Tag Completer.

Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
---
 drivers/pci/iov.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 4fd1fca69457..28dd6875e2cb 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -690,6 +690,15 @@ 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 ((pcie_tag_config == PCIE_TAG_DEFAULT) &&
+	    (iov->cap & PCI_SRIOV_CAP_VF_10BIT_TAG_REQ) &&
+	    pcie_rp_10bit_tag_cmp_supported(dev))
+		iov->ctrl |= PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN;
+
+	if (pcie_tag_config == PCIE_TAG_PEER2PEER)
+		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);
@@ -706,6 +715,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
 
 err_pcibios:
 	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
+	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);
@@ -738,6 +748,7 @@ static void sriov_disable(struct pci_dev *dev)
 
 	sriov_del_vfs(dev);
 	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
+	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);
-- 
2.22.0


      parent reply	other threads:[~2021-09-22 13:40 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-22 13:36 [PATCH V9 0/8] PCI: Enable 10-Bit tag support for PCIe devices Dongdong Liu
2021-09-22 13:36 ` [PATCH V9 1/8] PCI: Use cached devcap in more places Dongdong Liu
2021-09-22 13:36 ` [PATCH V9 2/8] PCI: Cache Device Capabilities 2 Register Dongdong Liu
2021-09-22 13:36 ` [PATCH V9 3/8] PCI: Add 10-Bit Tag register definitions Dongdong Liu
2021-09-22 13:36 ` [PATCH V9 4/8] PCI/sysfs: Add a 10-Bit Tag sysfs file PCIe Endpoint devices Dongdong Liu
2021-09-23  4:21   ` Krzysztof Wilczyński
2021-09-23 11:06     ` Dongdong Liu
2021-09-22 13:36 ` [PATCH V9 5/8] PCI/IOV: Add 10-Bit Tag sysfs files for VF devices Dongdong Liu
2021-09-22 13:36 ` [PATCH V9 6/8] PCI/P2PDMA: Add a 10-Bit Tag check in P2PDMA Dongdong Liu
2021-09-22 13:36 ` [PATCH V9 7/8] PCI: Enable 10-Bit Tag support for PCIe Endpoint device Dongdong Liu
2021-09-22 13:36 ` Dongdong Liu [this message]

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