On Sun, Jan 17, 2021 at 07:44:09AM +0200, Leon Romanovsky wrote: > On Thu, Jan 14, 2021 at 09:51:28AM -0800, Jakub Kicinski wrote: > > On Thu, 14 Jan 2021 12:31:35 +0200 Leon Romanovsky wrote: > > > The number of MSI-X vectors is PCI property visible through lspci, that > > > field is read-only and configured by the device. > > > > > > The static assignment of an amount of MSI-X vectors doesn't allow utilize > > > the newly created VF because it is not known to the device the future load > > > and configuration where that VF will be used. > > > > > > The VFs are created on the hypervisor and forwarded to the VMs that have > > > different properties (for example number of CPUs). > > > > > > To overcome the inefficiency in the spread of such MSI-X vectors, we > > > allow the kernel to instruct the device with the needed number of such > > > vectors, before VF is initialized and bounded to the driver. > > > > > > Hi Leon! > > > > Looks like you got some missing kdoc here, check out the test in > > patchwork so we don't need to worry about this later: > > > > https://patchwork.kernel.org/project/netdevbpf/list/?series=414497 > > Thanks Jakub, > > I'll add kdocs to internal mlx5 functions. > IMHO, they are useless. At the end, it looks like CI false alarm. drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c:81: warning: Function parameter or member 'dev' not described in 'mlx5_set_msix_vec_count' drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c:81: warning: Function parameter or member 'function_id' not described in 'mlx5_set_msix_vec_count' drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c:81: warning: Function parameter or member 'msix_vec_count' not described in 'mlx5_set_msix_vec_count' New warnings added The function mlx5_set_msix_vec_count() is documented. +/** + * mlx5_set_msix_vec_count() - Set dynamically allocated MSI-X to the VF + * @dev - PF to work on + * @function_id - internal PCI VF function id + * @msix_vec_count - Number of MSI-X to set + **/ +int mlx5_set_msix_vec_count(struct mlx5_core_dev *dev, int function_id, + int msix_vec_count) https://patchwork.kernel.org/project/netdevbpf/patch/20210114103140.866141-5-leon@xxxxxxxxxx/ Thanks > > Thanks
