Mimic UIO/VFIO drivers behavior by not causing errors when a device cannot
be initialized due to missing or mismatching kernel modules. Display helpful
messages instead, such as:
[...]
EAL: PCI device 0000:83:00.0 on NUMA socket 1
EAL: probe driver: 15b3:1007 librte_pmd_mlx4
PMD: librte_pmd_mlx4: PCI information matches, using device "mlx4_0" (VF:
false)
PMD: librte_pmd_mlx4: cannot use device, are drivers up to date?
EAL: PCI device 0000:84:00.0 on NUMA socket 1
EAL: probe driver: 15b3:1007 librte_pmd_mlx4
PMD: librte_pmd_mlx4: PCI information matches, using device "mlx4_1" (VF:
false)
PMD: librte_pmd_mlx4: cannot use device, are drivers up to date?
EAL: No probed ethernet devices
[...]
Signed-off-by: Adrien Mazarguil <adrien.mazarguil at 6wind.com>
---
lib/librte_pmd_mlx4/mlx4.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/lib/librte_pmd_mlx4/mlx4.c b/lib/librte_pmd_mlx4/mlx4.c
index 492cbbf..12d9379 100644
--- a/lib/librte_pmd_mlx4/mlx4.c
+++ b/lib/librte_pmd_mlx4/mlx4.c
@@ -4425,6 +4425,10 @@ mlx4_pci_devinit(struct rte_pci_driver *pci_drv, struct
rte_pci_device *pci_dev)
list = ibv_get_device_list(&i);
if (list == NULL) {
assert(errno);
+ if (errno == ENOSYS) {
+ WARN("cannot list devices, is ib_uverbs loaded?");
+ return 0;
+ }
return -errno;
}
assert(i >= 0);
@@ -4453,9 +4457,15 @@ mlx4_pci_devinit(struct rte_pci_driver *pci_drv, struct
rte_pci_device *pci_dev)
break;
}
if (attr_ctx == NULL) {
- if (err == 0)
- err = ENODEV;
ibv_free_device_list(list);
+ switch (err) {
+ case 0:
+ WARN("cannot access device, is mlx4_ib loaded?");
+ return 0;
+ case EINVAL:
+ WARN("cannot use device, are drivers up to date?");
+ return 0;
+ }
assert(err > 0);
return -err;
}
--
2.1.0
