From 3ca4fbc84a17b5c4f6c675e60ec5d3470019a83a Mon Sep 17 00:00:00 2001 From: Sebastian Sanchez Date: Sun, 9 Apr 2017 10:16:09 -0700 Subject: [PATCH] IB/hfi1: Return SC2VL mappings to FM with VL15 instead of ILLEGAL_VL VL15 in the SC2VL table is used to indicate an invalid SC for the FM, however, internally the driver remaps SCs from VL15 to ILLEGAL_VL to prevent error counts. This mapping confuses the FM when performing a sweep, making it return a table mismatch error. Have SMA convert ILLEGAL_VL to VL15 entries for the SC2VL table queries. Reviewed-by: Michael J. Ruhl Signed-off-by: Sebastian Sanchez Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford --- drivers/infiniband/hw/hfi1/mad.c | 41 +++++++++++++++++++------------- 1 file changed, 25 insertions(+), 16 deletions(-) diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c index 5e199988d5f7..08ed5a4a0c62 100644 --- a/drivers/infiniband/hw/hfi1/mad.c +++ b/drivers/infiniband/hw/hfi1/mad.c @@ -1,5 +1,5 @@ /* - * Copyright(c) 2015, 2016 Intel Corporation. + * Copyright(c) 2015-2017 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. @@ -1474,25 +1474,15 @@ static int __subn_set_opa_pkeytable(struct opa_smp *smp, u32 am, u8 *data, return __subn_get_opa_pkeytable(smp, am, data, ibdev, port, resp_len); } -static int get_sc2vlt_tables(struct hfi1_devdata *dd, void *data) -{ - u64 *val = data; - - *val++ = read_csr(dd, SEND_SC2VLT0); - *val++ = read_csr(dd, SEND_SC2VLT1); - *val++ = read_csr(dd, SEND_SC2VLT2); - *val++ = read_csr(dd, SEND_SC2VLT3); - return 0; -} - #define ILLEGAL_VL 12 /* * filter_sc2vlt changes mappings to VL15 to ILLEGAL_VL (except * for SC15, which must map to VL15). If we don't remap things this * way it is possible for VL15 counters to increment when we try to * send on a SC which is mapped to an invalid VL. + * When getting the table convert ILLEGAL_VL back to VL15. */ -static void filter_sc2vlt(void *data) +static void filter_sc2vlt(void *data, bool set) { int i; u8 *pd = data; @@ -1500,8 +1490,14 @@ static void filter_sc2vlt(void *data) for (i = 0; i < OPA_MAX_SCS; i++) { if (i == 15) continue; - if ((pd[i] & 0x1f) == 0xf) - pd[i] = ILLEGAL_VL; + + if (set) { + if ((pd[i] & 0x1f) == 0xf) + pd[i] = ILLEGAL_VL; + } else { + if ((pd[i] & 0x1f) == ILLEGAL_VL) + pd[i] = 0xf; + } } } @@ -1509,7 +1505,7 @@ static int set_sc2vlt_tables(struct hfi1_devdata *dd, void *data) { u64 *val = data; - filter_sc2vlt(data); + filter_sc2vlt(data, true); write_csr(dd, SEND_SC2VLT0, *val++); write_csr(dd, SEND_SC2VLT1, *val++); @@ -1521,6 +1517,19 @@ static int set_sc2vlt_tables(struct hfi1_devdata *dd, void *data) return 0; } +static int get_sc2vlt_tables(struct hfi1_devdata *dd, void *data) +{ + u64 *val = (u64 *)data; + + *val++ = read_csr(dd, SEND_SC2VLT0); + *val++ = read_csr(dd, SEND_SC2VLT1); + *val++ = read_csr(dd, SEND_SC2VLT2); + *val++ = read_csr(dd, SEND_SC2VLT3); + + filter_sc2vlt((u64 *)data, false); + return 0; +} + static int __subn_get_opa_sl_to_sc(struct opa_smp *smp, u32 am, u8 *data, struct ib_device *ibdev, u8 port, u32 *resp_len)