• Alexander Duyck's avatar
    fm10k: Add support for debugfs · 7461fd91
    Alexander Duyck authored
    This patch adds limited debugfs support for the driver.  Most of the
    functionality needed for dumping registers is already provided via ethtool.
    The only thing we saw that we really neeed was the ability to dump the
    descriptor rings so as such this patch will add a fm10k directory containing a
    listing of directories each one with a unique PCI Bus, Device, and Function
    number.  Each of those BDF directories will have a list of q_vectors, and
    the q_vectors will contain a file for each of the Rx/Tx rings that are a part
    of the vector.  For example:
    
    # ls -RD /sys/kernel/debug/fm10k/
    /sys/kernel/debug/fm10k/:
    0000:01:00.0
    
    /sys/kernel/debug/fm10k/0000:01:00.0:
    q_vector.000  q_vector.001  q_vector.002  q_vector.003
    
    /sys/kernel/debug/fm10k/0000:01:00.0/q_vector.000:
    rx_ring.000  tx_ring.000
    
    /sys/kernel/debug/fm10k/0000:01:00.0/q_vector.001:
    rx_ring.001  tx_ring.001
    
    /sys/kernel/debug/fm10k/0000:01:00.0/q_vector.002:
    rx_ring.002  tx_ring.002
    
    /sys/kernel/debug/fm10k/0000:01:00.0/q_vector.003:
    rx_ring.003  tx_ring.003
    
    # cat /sys/kernel/debug/fm10k/0000:01:00.0/q_vector.000/rx_ring.000
    DES DATA       RSS        STATERR    LENGTH VLAN   DGLORT SGLORT TIMESTAMP
    ---------------------------------------------------------------------------
    000 0x00000000 0x00000000 0x00000003 0x002a 0x0000 0x0000 0x0000 0x13951807dc4fedf0
    001 0x00000000 0x00000000 0x00000003 0x002a 0x0000 0x0000 0x0000 0x1395180906c9f2c8
    002 0x3731c000 0x00000000 0x00000000 0x0000 0x0000 0x0000 0x0000 0x0000000000000000
    003 0x3731d000 0x00000000 0x00000000 0x0000 0x0000 0x0000 0x0000 0x0000000000000000
    004 0xaab3a000 0x00000000 0x00000000 0x0000 0x0000 0x0000 0x0000 0x0000000000000000
    ...
    
    # cat /sys/kernel/debug/fm10k/0000:01:00.0/q_vector.000/tx_ring.000
    DES BUFFER_ADDRESS     LENGTH VLAN   MSS    HDRLEN FLAGS
    ---------------------------------------------------------
    000 0x00000000aa8a1002 0x005a 0x0000 0x0000 0x0000 0xc0
    001 0x00000000aa8a2002 0x005a 0x0000 0x0000 0x0000 0xc0
    002 0x000000006bc13202 0x004e 0x0000 0x0000 0x0000 0xc0
    003 0x000000006bc13c02 0x002a 0x0000 0x0000 0x0000 0xe1
    004 0x000000006bc13602 0x0062 0x0000 0x0000 0x0000 0xc0
    Signed-off-by: default avatarAlexander Duyck <alexander.h.duyck@intel.com>
    Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
    7461fd91
fm10k_main.c 52 KB