09/06/2017 12:27, Jerin Jacob:
> Some ethdev devices like nicvf thunderx PMD need special treatment for
> Secondary queue set(SQS) PCIe VF devices, where, it expects to not unmap
> or free the memory without registering the ethdev subsystem.
>
> Introducing a new RTE_PCI_DRV_KEEP_MAPPED_RES
> PCI driver flag to request PCI subsystem to not unmap the mapped PCI
> resources(PCI BAR address) if unsupported device detected.
>
> Suggested-by: Ferruh Yigit <ferruh.yi...@intel.com>
> Signed-off-by: Jerin Jacob <jerin.ja...@caviumnetworks.com>
[...]
> --- a/lib/librte_eal/common/eal_common_pci.c
> +++ b/lib/librte_eal/common/eal_common_pci.c
> @@ -221,7 +221,12 @@ rte_pci_probe_one_driver(struct rte_pci_driver *dr,
> ret = dr->probe(dr, dev);
> if (ret) {
> dev->driver = NULL;
> - if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
> + if ((dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) &&
> + /* Don't unmap if device is unsupported and
> + * driver needs mapped resources.
> + */
> + !(ret > 0 &&
> + (dr->drv_flags & RTE_PCI_DRV_KEEP_MAPPED_RES)))
> rte_pci_unmap_device(dev);
> }
>
> --- a/lib/librte_eal/common/include/rte_pci.h
> +++ b/lib/librte_eal/common/include/rte_pci.h
> +/** Device driver needs to keep mapped resources if unsupported dev detected
> */
> +#define RTE_PCI_DRV_KEEP_MAPPED_RES 0x0020
If I understand well, you want to map resources but not probe it?
Shouldn't it be less hacky to probe it as a (new) null class?
