diff options
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_init_chip.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_init_chip.c | 30 |
1 files changed, 8 insertions, 22 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_init_chip.c b/drivers/infiniband/hw/ipath/ipath_init_chip.c index 5428aff..f0d7848 100644 --- a/drivers/infiniband/hw/ipath/ipath_init_chip.c +++ b/drivers/infiniband/hw/ipath/ipath_init_chip.c @@ -155,24 +155,13 @@ static int bringup_link(struct ipath_devdata *dd) dd->ipath_control); /* - * Note that prior to try 14 or 15 of IB, the credit scaling - * wasn't working, because it was swapped for writes with the - * 1 bit default linkstate field + * set initial max size pkt IBC will send, including ICRC; it's the + * PIO buffer size in dwords, less 1; also see ipath_set_mtu() */ + val = (dd->ipath_ibmaxlen >> 2) + 1; + ibc = val << dd->ibcc_mpl_shift; - /* ignore pbc and align word */ - val = dd->ipath_piosize2k - 2 * sizeof(u32); - /* - * for ICRC, which we only send in diag test pkt mode, and we - * don't need to worry about that for mtu - */ - val += 1; - /* - * Set the IBC maxpktlength to the size of our pio buffers the - * maxpktlength is in words. This is *not* the IB data MTU. - */ - ibc = (val / sizeof(u32)) << INFINIPATH_IBCC_MAXPKTLEN_SHIFT; - /* in KB */ + /* flowcontrolwatermark is in units of KBytes */ ibc |= 0x5ULL << INFINIPATH_IBCC_FLOWCTRLWATERMARK_SHIFT; /* * How often flowctrl sent. More or less in usecs; balance against @@ -295,12 +284,9 @@ static int init_chip_first(struct ipath_devdata *dd, val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiosize); dd->ipath_piosize2k = val & ~0U; dd->ipath_piosize4k = val >> 32; - /* - * Note: the chips support a maximum MTU of 4096, but the driver - * hasn't implemented this feature yet, so set the initial value - * to 2048. - */ - dd->ipath_ibmtu = 2048; + if (dd->ipath_piosize4k == 0 && ipath_mtu4096) + ipath_mtu4096 = 0; /* 4KB not supported by this chip */ + dd->ipath_ibmtu = ipath_mtu4096 ? 4096 : 2048; val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiobufcnt); dd->ipath_piobcnt2k = val & ~0U; dd->ipath_piobcnt4k = val >> 32; |