These patches introduce the ability to report PCI link width and speed for all PCI devices in kernel log. This would reduce code duplication between drivers and unify the approach for reporting PCI link status. Implemented and tested for Mellanox devices. v3: Add Reviewed-by: Tariq Toukan to all commits. v2: Remove chain BW calculation. This might be a nice feature, but without the ability to know the exact limiting part, it is more confusing than useful. Remove warnings for failed PCI query actions, leaving only the status and gaps from max capabilities report. Use pci_warn()/pci_info() instead of dev_warn()/dev_info(). (suggested by Bjorn Helgaas). v1: Split to multiple patches, calculate BW limitation and remove MACRO definition for LNKCAP shift (suggested by Bjorn Helgaas). Multiple fixes - conventions, typos, function naming and functional (suggested by Tariq Toukan). Tal Gilboa (5): PCI: Add a query function for PCI device's speed cap PCI: Add a query function for PCI device's width cap PCI: Print PCI device link status in kernel log net/mlx4_core: Report PCI properties using dedicated function net/mlx5: Report device PCI link status and issues drivers/net/ethernet/mellanox/mlx4/main.c | 81 +---------------------- drivers/net/ethernet/mellanox/mlx5/core/main.c | 2 + drivers/pci/pci-sysfs.c | 28 +++----- drivers/pci/pci.c | 90 ++++++++++++++++++++++++++ include/linux/pci.h | 9 +++ 5 files changed, 110 insertions(+), 100 deletions(-) -- 1.8.3.1
