From: Mitko Haralanov Date: Mon, 28 Feb 2011 13:39:49 +0000 (+0000) Subject: IB/qib: Set default LE2 value for active cables to 0 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4634b7945cf0d6a66036ad10c3d658ae4eb39fa0;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git IB/qib: Set default LE2 value for active cables to 0 For active and far-EQ cables use an LE2 value of 0 for improved SI. Signed-off-by: Mitko Haralanov Signed-off-by: Mike Marciniszyn Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c index b01809a82cb0..4a2d21e15a70 100644 --- a/drivers/infiniband/hw/qib/qib_iba7322.c +++ b/drivers/infiniband/hw/qib/qib_iba7322.c @@ -5582,9 +5582,16 @@ static void qsfp_7322_event(struct work_struct *work) * even on failure to read cable information. We don't * get here for QME, so IS_QME check not needed here. */ - le2 = (!ret && qd->cache.atten[1] >= qib_long_atten && - !ppd->dd->cspec->r1 && QSFP_IS_CU(qd->cache.tech)) ? - LE2_5m : LE2_DEFAULT; + if (!ret && !ppd->dd->cspec->r1) { + if (QSFP_IS_ACTIVE_FAR(qd->cache.tech)) + le2 = LE2_QME; + else if (qd->cache.atten[1] >= qib_long_atten && + QSFP_IS_CU(qd->cache.tech)) + le2 = LE2_5m; + else + le2 = LE2_DEFAULT; + } else + le2 = LE2_DEFAULT; ibsd_wr_allchans(ppd, 13, (le2 << 7), BMASK(9, 7)); init_txdds_table(ppd, 0); } diff --git a/drivers/infiniband/hw/qib/qib_qsfp.h b/drivers/infiniband/hw/qib/qib_qsfp.h index 19b527bafd57..c109bbdc90ac 100644 --- a/drivers/infiniband/hw/qib/qib_qsfp.h +++ b/drivers/infiniband/hw/qib/qib_qsfp.h @@ -79,6 +79,8 @@ extern const char *const qib_qsfp_devtech[16]; /* Active Equalization includes fiber, copper full EQ, and copper near Eq */ #define QSFP_IS_ACTIVE(tech) ((0xA2FF >> ((tech) >> 4)) & 1) +/* Active Equalization includes fiber, copper full EQ, and copper far Eq */ +#define QSFP_IS_ACTIVE_FAR(tech) ((0x32FF >> ((tech) >> 4)) & 1) /* Attenuation should be valid for copper other than full/near Eq */ #define QSFP_HAS_ATTEN(tech) ((0x4D00 >> ((tech) >> 4)) & 1) /* Length is only valid if technology is "copper" */