• Grant Erickson's avatar
    ibm_newemac: Parameterize EMAC Multicast Match Handling · 05781ccd
    Grant Erickson authored
    Various instances of the EMAC core have varying: 1) number of address
    match slots, 2) width of the registers for handling address match slots,
    3) number of registers for handling address match slots and 4) base
    offset for those registers.
    
    As the driver stands today, it assumes that all EMACs have 4 IAHT and
    GAHT 32-bit registers, starting at offset 0x30 from the register base,
    with only 16-bits of each used for a total of 64 match slots.
    
    The 405EX(r) and 460EX now use the EMAC4SYNC core rather than the EMAC4
    core. This core has 8 IAHT and GAHT registers, starting at offset 0x80
    from the register base, with ALL 32-bits of each used for a total of
    256 match slots.
    
    This adds a new compatible device tree entry "emac4sync" and a new,
    related feature flag "EMAC_FTR_EMAC4SYNC" along with a series of macros
    and inlines which supply the appropriate parameterized value based on
    the presence or absence of the EMAC4SYNC feature.
    
    The code has further been reworked where appropriate to use those macros
    and inlines.
    
    In addition, the register size passed to ioremap is now taken from the
    device tree:
    
    	c4 for EMAC4SYNC cores
    	74 for EMAC4 cores
    	70 for EMAC cores
    
    rather than sizeof (emac_regs).
    
    Finally, the device trees have been updated with the appropriate compatible
    entries and resource sizes.
    
    This has been tested on an AMCC Haleakala board such that: 1) inbound
    ICMP requests to 'haleakala.local' via MDNS from both Mac OS X 10.4.11
    and Ubuntu 8.04 systems as well as 2) outbound ICMP requests from
    'haleakala.local' to those same systems in the '.local' domain via MDNS
    now work.
    Signed-off-by: default avatarGrant Erickson <gerickson@nuovations.com>
    Acked-by: default avatarJeff Garzik <jgarzik@pobox.com>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    05781ccd
debug.c 7.31 KB