From: Divy Le Ray <[email protected]>
The cxgb3 driver is incorrectly configuring the HW CQ context for CQ's
that use overflow-avoidance. Namely the RDMA control CQ. This results
in a bad DMA from the device to bus address 0. The solution is to set
the CQ_ERR bit in the context for these types of CQs.
Signed-off-by: Divy Le Ray <[email protected]>
---
drivers/net/cxgb3/sge_defs.h | 4 ++++
drivers/net/cxgb3/t3_hw.c | 3 ++-
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/net/cxgb3/sge_defs.h b/drivers/net/cxgb3/sge_defs.h
index 514869e..29b6c80 100644
--- a/drivers/net/cxgb3/sge_defs.h
+++ b/drivers/net/cxgb3/sge_defs.h
@@ -106,6 +106,10 @@
#define V_CQ_GEN(x) ((x) << S_CQ_GEN)
#define F_CQ_GEN V_CQ_GEN(1U)
+#define S_CQ_ERR 30
+#define V_CQ_ERR(x) ((x) << S_CQ_ERR)
+#define F_CQ_ERR V_CQ_ERR(1U)
+
#define S_CQ_OVERFLOW_MODE 31
#define V_CQ_OVERFLOW_MODE(x) ((x) << S_CQ_OVERFLOW_MODE)
#define F_CQ_OVERFLOW_MODE V_CQ_OVERFLOW_MODE(1U)
diff --git a/drivers/net/cxgb3/t3_hw.c b/drivers/net/cxgb3/t3_hw.c
index 538b254..9358959 100644
--- a/drivers/net/cxgb3/t3_hw.c
+++ b/drivers/net/cxgb3/t3_hw.c
@@ -2043,7 +2043,8 @@ int t3_sge_init_cqcntxt(struct adapter *adapter, unsigned int id, u64 base_addr,
base_addr >>= 32;
t3_write_reg(adapter, A_SG_CONTEXT_DATA2,
V_CQ_BASE_HI((u32) base_addr) | V_CQ_RSPQ(rspq) |
- V_CQ_GEN(1) | V_CQ_OVERFLOW_MODE(ovfl_mode));
+ V_CQ_GEN(1) | V_CQ_OVERFLOW_MODE(ovfl_mode) |
+ V_CQ_ERR(ovfl_mode));
t3_write_reg(adapter, A_SG_CONTEXT_DATA3, V_CQ_CREDITS(credits) |
V_CQ_CREDIT_THRES(credit_thres));
return t3_sge_write_context(adapter, id, F_CQ);
-
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