In vfio-pci driver when PASID is enabled by default DLB hardware puts
DLB in SIOV mode. This breaks DLB PF-PMD mode. For DLB PF-PMD mode to
function properly PASID needs to be disabled.
In this commit this issue is addressed and PASID is disabled by writing
a zero to PASID control register.
Fixes: 5433956d5185 ("event/dlb2: add eventdev probe")
Cc: sta...@dpdk.org
Signed-off-by: Abdullah Sevincer <abdullah.sevin...@intel.com>
---
drivers/event/dlb2/pf/dlb2_main.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/event/dlb2/pf/dlb2_main.c
b/drivers/event/dlb2/pf/dlb2_main.c
index aa03e4c311..843fe215aa 100644
--- a/drivers/event/dlb2/pf/dlb2_main.c
+++ b/drivers/event/dlb2/pf/dlb2_main.c
@@ -514,6 +514,16 @@ dlb2_pf_reset(struct dlb2_dev *dlb2_dev)
}
}
+ /* Disable PASID if it is enabled by default, which
+ * breaks the DLB if enabled.
+ */
+ off = RTE_PCI_PASID_CAP_OFFSET + RTE_PCI_PASID_CTRL;
+ if (rte_pci_set_pasid(pdev, off, false)) {
+ DLB2_LOG_ERR("[%s()] failed to write the pcie config space at
offset %d\n",
+ __func__, (int)off);
+ return -1;
+ }
+
return 0;
}
--
2.25.1
