netdev - [PATCH net-next 8/8] ice: introduce ice_get_vf_by

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Message-ID: <20250710214518.1824208-9-anthony.l.nguyen@intel.com>
Date: Thu, 10 Jul 2025 14:45:17 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	andrew+netdev@...n.ch,
	netdev@...r.kernel.org
Cc: Jacob Keller <jacob.e.keller@...el.com>,
	anthony.l.nguyen@...el.com,
	madhu.chittim@...el.com,
	yahui.cao@...el.com,
	przemyslaw.kitszel@...el.com,
	Rafal Romanowski <rafal.romanowski@...el.com>
Subject: [PATCH net-next 8/8] ice: introduce ice_get_vf_by_dev() wrapper

From: Jacob Keller <jacob.e.keller@...el.com>

The ice_get_vf_by_id() function is used to obtain a reference to a VF
structure based on its ID. The ice_sriov_set_msix_vec_count() function
needs to get a VF reference starting from the VF PCI device, and uses
pci_iov_vf_id() to get the VF ID. This pattern is currently uncommon in the
ice driver. However, the live migration module will introduce many more
such locations.

Add a helper wrapper ice_get_vf_by_dev() which takes the VF PCI device and
calls ice_get_vf_by_id() using pci_iov_vf_id() to get the VF ID.

Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
Tested-by: Rafal Romanowski <rafal.romanowski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_sriov.c  |  7 +------
 drivers/net/ethernet/intel/ice/ice_vf_lib.h | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_sriov.c b/drivers/net/ethernet/intel/ice/ice_sriov.c
index f78d5d8d516c..c434326a4694 100644
--- a/drivers/net/ethernet/intel/ice/ice_sriov.c
+++ b/drivers/net/ethernet/intel/ice/ice_sriov.c
@@ -933,7 +933,6 @@ int ice_sriov_set_msix_vec_count(struct pci_dev *vf_dev, int msix_vec_count)
 	bool needs_rebuild = false;
 	struct ice_vsi *vsi;
 	struct ice_vf *vf;
-	int id;
 
 	if (!ice_get_num_vfs(pf))
 		return -ENOENT;
@@ -952,11 +951,7 @@ int ice_sriov_set_msix_vec_count(struct pci_dev *vf_dev, int msix_vec_count)
 	if (msix_vec_count < ICE_MIN_INTR_PER_VF)
 		return -EINVAL;
 
-	id = pci_iov_vf_id(vf_dev);
-	if (id < 0)
-		return id;
-
-	vf = ice_get_vf_by_id(pf, id);
+	vf = ice_get_vf_by_dev(pf, vf_dev);
 	if (!vf)
 		return -ENOENT;
 
diff --git a/drivers/net/ethernet/intel/ice/ice_vf_lib.h b/drivers/net/ethernet/intel/ice/ice_vf_lib.h
index a5ee380f8c9e..ffe1f9f830ea 100644
--- a/drivers/net/ethernet/intel/ice/ice_vf_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_vf_lib.h
@@ -239,6 +239,18 @@ static inline bool ice_vf_is_lldp_ena(struct ice_vf *vf)
 
 #ifdef CONFIG_PCI_IOV
 struct ice_vf *ice_get_vf_by_id(struct ice_pf *pf, u16 vf_id);
+
+static inline struct ice_vf *ice_get_vf_by_dev(struct ice_pf *pf,
+					       struct pci_dev *vf_dev)
+{
+	int vf_id = pci_iov_vf_id(vf_dev);
+
+	if (vf_id < 0)
+		return NULL;
+
+	return ice_get_vf_by_id(pf, pci_iov_vf_id(vf_dev));
+}
+
 void ice_put_vf(struct ice_vf *vf);
 bool ice_has_vfs(struct ice_pf *pf);
 u16 ice_get_num_vfs(struct ice_pf *pf);
@@ -265,6 +277,12 @@ static inline struct ice_vf *ice_get_vf_by_id(struct ice_pf *pf, u16 vf_id)
 	return NULL;
 }
 
+static inline struct ice_vf *ice_get_vf_by_dev(struct ice_pf *pf,
+					       struct pci_dev *vf_dev)
+{
+	return NULL;
+}
+
 static inline void ice_put_vf(struct ice_vf *vf)
 {
 }
-- 
2.47.1