Re: [dpdk-dev] [PATCH v3] drivers: advertise kmod dependencies in pmdinfo

[Neil Horman <nhorman@tuxdriver.com>]

On Thu, Dec 15, 2016 at 02:46:39PM +0100, Olivier Matz wrote:
> Add a new macro RTE_PMD_REGISTER_KMOD_DEP() that allows a driver to
> declare the list of kernel modules required to run properly.
> 
> Today, most PCI drivers require uio/vfio.
> 
> Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
> Acked-by: Fiona Trahe <fiona.trahe@intel.com>
> ---
> 
> v2 -> v3:
> - fix kmods deps advertised by mellanox drivers as pointed out
>   by Adrien
> 
> v1 -> v2:                                                                                                
> - do not advertise uio_pci_generic for vf drivers
> - rebase on top of head: use new driver names and prefix
>   macro with RTE_                                                                                       
> 
> rfc -> v1:
> - the kmod information can be per-device using a modalias-like
>   pattern
> - change syntax to use '&' and '|' instead of ',' and ':'
> - remove useless prerequisites in kmod lis: no need to
>   specify both uio and uio_pci_generic, only the latter is
>   required
> - update kmod list in szedata2 driver
> - remove kmod list in qat driver: it requires more than just loading
>   a kmod, which is described in documentation
> 
>  buildtools/pmdinfogen/pmdinfogen.c      |  1 +
>  buildtools/pmdinfogen/pmdinfogen.h      |  1 +
>  drivers/net/bnx2x/bnx2x_ethdev.c        |  2 ++
>  drivers/net/bnxt/bnxt_ethdev.c          |  1 +
>  drivers/net/cxgbe/cxgbe_ethdev.c        |  1 +
>  drivers/net/e1000/em_ethdev.c           |  1 +
>  drivers/net/e1000/igb_ethdev.c          |  2 ++
>  drivers/net/ena/ena_ethdev.c            |  1 +
>  drivers/net/enic/enic_ethdev.c          |  1 +
>  drivers/net/fm10k/fm10k_ethdev.c        |  1 +
>  drivers/net/i40e/i40e_ethdev.c          |  1 +
>  drivers/net/i40e/i40e_ethdev_vf.c       |  1 +
>  drivers/net/ixgbe/ixgbe_ethdev.c        |  2 ++
>  drivers/net/mlx4/mlx4.c                 |  2 ++
>  drivers/net/mlx5/mlx5.c                 |  1 +
>  drivers/net/nfp/nfp_net.c               |  1 +
>  drivers/net/qede/qede_ethdev.c          |  2 ++
>  drivers/net/szedata2/rte_eth_szedata2.c |  2 ++
>  drivers/net/thunderx/nicvf_ethdev.c     |  1 +
>  drivers/net/virtio/virtio_ethdev.c      |  1 +
>  drivers/net/vmxnet3/vmxnet3_ethdev.c    |  1 +
>  lib/librte_eal/common/include/rte_dev.h | 25 +++++++++++++++++++++++++
>  tools/dpdk-pmdinfo.py                   |  5 ++++-
>  23 files changed, 56 insertions(+), 1 deletion(-)
> 
Its odd that all devices, regardless of vendor should depend on the igb_uio
module.  It seems to me that depending on uio_pci_generic or vfio is sufficient.

Neil