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 | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/event/dlb2/pf/dlb2_main.c
b/drivers/event/dlb2/pf/dlb2_main.c
index aa03e4c311..05c2354515 100644
--- a/drivers/event/dlb2/pf/dlb2_main.c
+++ b/drivers/event/dlb2/pf/dlb2_main.c
@@ -26,6 +26,7 @@
#define PF_ID_ZERO 0 /* PF ONLY! */
#define NO_OWNER_VF 0 /* PF ONLY! */
#define NOT_VF_REQ false /* PF ONLY! */
+#define DLB2_PCI_PASID_CAP_OFFSET 0x148 /* PASID capability offset */
static int
dlb2_pf_init_driver_state(struct dlb2_dev *dlb2_dev)
@@ -514,6 +515,16 @@ dlb2_pf_reset(struct dlb2_dev *dlb2_dev)
}
}
+ /* Disable PASID if it is enabled by default, which
+ * breaks the DLB if enabled.
+ */
+ off = DLB2_PCI_PASID_CAP_OFFSET + RTE_PCI_PASID_CTRL;
+ if (rte_pci_pasid_ena_dis(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
