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path: root/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
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Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c')
-rw-r--r--drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
index 6c85a10f465c..23a2ebdfd503 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
@@ -1794,11 +1794,25 @@ int cudbg_collect_sge_indirect(struct cudbg_init *pdbg_init,
struct cudbg_buffer temp_buff = { 0 };
struct sge_qbase_reg_field *sge_qbase;
struct ireg_buf *ch_sge_dbg;
+ u8 padap_running = 0;
int i, rc;
+ u32 size;
- rc = cudbg_get_buff(pdbg_init, dbg_buff,
- sizeof(*ch_sge_dbg) * 2 + sizeof(*sge_qbase),
- &temp_buff);
+ /* Accessing SGE_QBASE_MAP[0-3] and SGE_QBASE_INDEX regs can
+ * lead to SGE missing doorbells under heavy traffic. So, only
+ * collect them when adapter is idle.
+ */
+ for_each_port(padap, i) {
+ padap_running = netif_running(padap->port[i]);
+ if (padap_running)
+ break;
+ }
+
+ size = sizeof(*ch_sge_dbg) * 2;
+ if (!padap_running)
+ size += sizeof(*sge_qbase);
+
+ rc = cudbg_get_buff(pdbg_init, dbg_buff, size, &temp_buff);
if (rc)
return rc;
@@ -1820,7 +1834,8 @@ int cudbg_collect_sge_indirect(struct cudbg_init *pdbg_init,
ch_sge_dbg++;
}
- if (CHELSIO_CHIP_VERSION(padap->params.chip) > CHELSIO_T5) {
+ if (CHELSIO_CHIP_VERSION(padap->params.chip) > CHELSIO_T5 &&
+ !padap_running) {
sge_qbase = (struct sge_qbase_reg_field *)ch_sge_dbg;
/* 1 addr reg SGE_QBASE_INDEX and 4 data reg
* SGE_QBASE_MAP[0-3]