cxgb3 - CQ context operations time out too soon.

Currently, the driver only tries up to 5 times (5us) to get the results
of a CQ context operation.  Testing has shown the chip can take as much
as 50us to return the response on SG_CONTEXT_CMD operations.  So we up
the retry count to 100 to cover high loads.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/net/cxgb3/t3_hw.c b/drivers/net/cxgb3/t3_hw.c
index bff1d02..0583293 100644 (file)
--- a/drivers/net/cxgb3/t3_hw.c
+++ b/drivers/net/cxgb3/t3_hw.c
@@ -1870,6 +1870,8 @@ void t3_port_intr_clear(struct adapter *adapter, int idx)
        phy->ops->intr_clear(phy);
 }
 
+#define SG_CONTEXT_CMD_ATTEMPTS 100
+
 /**
  *     t3_sge_write_context - write an SGE context
  *     @adapter: the adapter
@@ -1889,7 +1891,7 @@ static int t3_sge_write_context(struct adapter *adapter, unsigned int id,
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | type | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
-                              0, 5, 1);
+                              0, SG_CONTEXT_CMD_ATTEMPTS, 1);
 }
 
 /**
@@ -2075,7 +2077,7 @@ int t3_sge_enable_ecntxt(struct adapter *adapter, unsigned int id, int enable)
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | F_EGRESS | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
-                              0, 5, 1);
+                              0, SG_CONTEXT_CMD_ATTEMPTS, 1);
 }
 
 /**
@@ -2099,7 +2101,7 @@ int t3_sge_disable_fl(struct adapter *adapter, unsigned int id)
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | F_FREELIST | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
-                              0, 5, 1);
+                              0, SG_CONTEXT_CMD_ATTEMPTS, 1);
 }
 
 /**
@@ -2123,7 +2125,7 @@ int t3_sge_disable_rspcntxt(struct adapter *adapter, unsigned int id)
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | F_RESPONSEQ | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
-                              0, 5, 1);
+                              0, SG_CONTEXT_CMD_ATTEMPTS, 1);
 }
 
 /**
@@ -2147,7 +2149,7 @@ int t3_sge_disable_cqcntxt(struct adapter *adapter, unsigned int id)
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(1) | F_CQ | V_CONTEXT(id));
        return t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
-                              0, 5, 1);
+                              0, SG_CONTEXT_CMD_ATTEMPTS, 1);
 }
 
 /**
@@ -2172,7 +2174,7 @@ int t3_sge_cqcntxt_op(struct adapter *adapter, unsigned int id, unsigned int op,
        t3_write_reg(adapter, A_SG_CONTEXT_CMD, V_CONTEXT_CMD_OPCODE(op) |
                     V_CONTEXT(id) | F_CQ);
        if (t3_wait_op_done_val(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY,
-                               0, 5, 1, &val))
+                               0, SG_CONTEXT_CMD_ATTEMPTS, 1, &val))
                return -EIO;
 
        if (op >= 2 && op < 7) {
@@ -2182,7 +2184,8 @@ int t3_sge_cqcntxt_op(struct adapter *adapter, unsigned int id, unsigned int op,
                t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                             V_CONTEXT_CMD_OPCODE(0) | F_CQ | V_CONTEXT(id));
                if (t3_wait_op_done(adapter, A_SG_CONTEXT_CMD,
-                                   F_CONTEXT_CMD_BUSY, 0, 5, 1))
+                                   F_CONTEXT_CMD_BUSY, 0,
+                                   SG_CONTEXT_CMD_ATTEMPTS, 1))
                        return -EIO;
                return G_CQ_INDEX(t3_read_reg(adapter, A_SG_CONTEXT_DATA0));
        }
@@ -2208,7 +2211,7 @@ static int t3_sge_read_context(unsigned int type, struct adapter *adapter,
        t3_write_reg(adapter, A_SG_CONTEXT_CMD,
                     V_CONTEXT_CMD_OPCODE(0) | type | V_CONTEXT(id));
        if (t3_wait_op_done(adapter, A_SG_CONTEXT_CMD, F_CONTEXT_CMD_BUSY, 0,
-                           5, 1))
+                           SG_CONTEXT_CMD_ATTEMPTS, 1))
                return -EIO;
        data[0] = t3_read_reg(adapter, A_SG_CONTEXT_DATA0);
        data[1] = t3_read_reg(adapter, A_SG_CONTEXT_DATA1);