From: Emily Deng <Emily.Deng@amd.com>
To: <amd-gfx@lists.freedesktop.org>, <bhelgaas@google.com>,
<alex.williamson@redhat.com>, <linux-pci@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <kvm@vger.kernel.org>
Cc: Emily Deng <Emily.Deng@amd.com>
Subject: [PATCH] PCI: Add vf reset notification for pf
Date: Sun, 4 Feb 2024 14:12:57 +0800 [thread overview]
Message-ID: <20240204061257.1408243-1-Emily.Deng@amd.com> (raw)
When a vf has been reset, the pf wants to get notification to remove the vf
out of schedule.
Solution:
Add the callback function in pci_driver sriov_vf_reset_notification. When
vf reset happens, then call this callback function.
Signed-off-by: Emily Deng <Emily.Deng@amd.com>
---
drivers/pci/pci.c | 8 ++++++++
include/linux/pci.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 60230da957e0..aca937b05531 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4780,6 +4780,14 @@ EXPORT_SYMBOL_GPL(pcie_flr);
*/
int pcie_reset_flr(struct pci_dev *dev, bool probe)
{
+ struct pci_dev *pf_dev;
+
+ if (dev->is_virtfn) {
+ pf_dev = dev->physfn;
+ if (pf_dev->driver->sriov_vf_reset_notification)
+ pf_dev->driver->sriov_vf_reset_notification(pf_dev, dev);
+ }
+
if (dev->dev_flags & PCI_DEV_FLAGS_NO_FLR_RESET)
return -ENOTTY;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index c69a2cc1f412..4fa31d9b0aa7 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -926,6 +926,7 @@ struct pci_driver {
int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
int (*sriov_set_msix_vec_count)(struct pci_dev *vf, int msix_vec_count); /* On PF */
u32 (*sriov_get_vf_total_msix)(struct pci_dev *pf);
+ void (*sriov_vf_reset_notification)(struct pci_dev *pf, struct pci_dev *vf);
const struct pci_error_handlers *err_handler;
const struct attribute_group **groups;
const struct attribute_group **dev_groups;
--
2.36.1
next reply other threads:[~2024-02-04 6:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-04 6:12 Emily Deng [this message]
2024-02-04 7:08 ` [PATCH] PCI: Add vf reset notification for pf Keith Busch
2024-02-04 11:20 ` Leon Romanovsky
2024-02-05 3:47 ` Deng, Emily
2024-02-05 11:28 ` Christian König
2024-02-05 12:22 ` Zhi Wang
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