[PATCH] net/cpfl: fix VF ID calculation for vCPF

[PATCH] net/cpfl: fix VF ID calculation for vCPF

[Atul Patel]

The VF ID was incorrectly set to only the PCI function number,
which fails when VFs span multiple PCI devices (device IDs > 0).
Calculate the VF ID as (device_id * 8) + function to correctly
map VFs across devices.

Fixes: f1ab44fb0ebf ("net/cpfl: add vCPF port info")

Signed-off-by: Praveen Shetty <praveen.shetty@intel.com>
Signed-off-by: Atul Patel <atul.patel@intel.com>
Signed-off-by: Dhananjay Shukla <dhananjay.shukla@intel.com>
---
 drivers/net/intel/cpfl/cpfl_ethdev.c |  3 ++-
 drivers/net/intel/cpfl/cpfl_ethdev.h | 10 ++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/intel/cpfl/cpfl_ethdev.c b/drivers/net/intel/cpfl/cpfl_ethdev.c
index 4315adb68c..01e1b57cc8 100644
--- a/drivers/net/intel/cpfl/cpfl_ethdev.c
+++ b/drivers/net/intel/cpfl/cpfl_ethdev.c
@@ -2839,7 +2839,8 @@ cpfl_dev_vport_init(struct rte_eth_dev *dev, void *init_params)
 		pci_dev = RTE_CLASS_TO_BUS_DEVICE(dev, *pci_dev);
 		vi.func_type = VCPF_CPCHNL2_FTYPE_LAN_VF;
 		vi.pf_id = CPFL_HOST0_CPF_ID;
-		vi.vf_id = pci_dev->addr.function;
+		vi.vf_id = VCPF_VF_ID_FROM_PCI(pci_dev->addr.devid,
+						pci_dev->addr.function);
 
 		v_id.vport_id = cpfl_vport->base.vport_info.info.vport_id;
 		v_id.vport_type = cpfl_vport->base.vport_info.info.vport_type;
diff --git a/drivers/net/intel/cpfl/cpfl_ethdev.h b/drivers/net/intel/cpfl/cpfl_ethdev.h
index d41aa93191..97ec128128 100644
--- a/drivers/net/intel/cpfl/cpfl_ethdev.h
+++ b/drivers/net/intel/cpfl/cpfl_ethdev.h
@@ -103,6 +103,16 @@
 	((((type) & 0x3) << 14) + (((host_id) & 0x1) << 13) +	\
 	 (((pf_id) & 0x1) << 12) + ((vf_id) & 0xfff))
 
+/* Max VFs per PCI device (functions 0-7) */
+#define VCPF_VFS_PER_PCI_DEV	8
+
+/* Calculate VF ID from PCI device and function IDs.
+ * VFs span multiple PCI devices, e.g.:
+ *   device 0: VF 0-7, device 1: VF 8-15, etc.
+ */
+#define VCPF_VF_ID_FROM_PCI(device_id, function) \
+	(((device_id) * VCPF_VFS_PER_PCI_DEV) + (function))
+
 struct cpfl_vport_param {
 	struct cpfl_adapter_ext *adapter;
 	uint16_t devarg_id; /* arg id from user */
-- 
2.34.1