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mlx4: avoid init errors when kernel modules are not loaded

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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@6wind.com>
This commit is contained in:
Adrien Mazarguil 2015-02-27 19:27:00 +01:00 committed by Thomas Monjalon
parent 1257d1734b
commit 66e1591687
1 changed files with 12 additions and 2 deletions
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14
lib/librte_pmd_mlx4/mlx4.c
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@ -4423,6 +4423,10 @@ 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);
@ -4451,9 +4455,15 @@ 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;
}