bnx2x: Statistics

Statistics
- Making sure that each drop is accounted for in the driver statistics
- Clearing the FW statistics when driver is loaded to prevent
  inconsistency with HW statistics
- Once error is detected (bnx2x_panic_dump), stop the statistics
  before other actions (currently it is stopped last and can corrupt
  the data) - Adding HW checksum error counter to the statistics
- Removing unused variable stats_ticks
- Using macros instead of magic numbers to indicate which statistics are
  shared per port and which are per function
Signed-off-by: Yitchak Gertner <gertner@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bnx2x.h

@@ -258,8 +258,7 @@ struct bnx2x_fastpath {
 
 	unsigned long		tx_pkt,
 				rx_pkt,
-				rx_calls,
-				rx_alloc_failed;
+				rx_calls;
 	/* TPA related */
 	struct sw_rx_bd		tpa_pool[ETH_MAX_AGGREGATION_QUEUES_E1H];
 	u8			tpa_state[ETH_MAX_AGGREGATION_QUEUES_E1H];
@@ -655,6 +654,8 @@ struct bnx2x_eth_stats {
 
 	u32 brb_drop_hi;
 	u32 brb_drop_lo;
+	u32 brb_truncate_hi;
+	u32 brb_truncate_lo;
 
 	u32 jabber_packets_received;
 
@@ -671,6 +672,9 @@ struct bnx2x_eth_stats {
 	u32 mac_discard;
 
 	u32 driver_xoff;
+	u32 rx_err_discard_pkt;
+	u32 rx_skb_alloc_failed;
+	u32 hw_csum_err;
 };
 
 #define STATS_OFFSET32(stat_name) \
@@ -844,7 +848,6 @@ struct bnx2x {
 	u16			rx_ticks_int;
 	u16			rx_ticks;
 
-	u32			stats_ticks;
 	u32			lin_cnt;
 
 	int			state;
@@ -984,7 +987,7 @@ static inline u32 reg_poll(struct bnx2x *bp, u32 reg, u32 expected, int ms,
 #define PCICFG_LINK_SPEED_SHIFT		16
 
 
-#define BNX2X_NUM_STATS			39
+#define BNX2X_NUM_STATS			42
 #define BNX2X_NUM_TESTS			8
 
 #define BNX2X_MAC_LOOPBACK		0

drivers/net/bnx2x_fw_defs.h

@@ -79,6 +79,9 @@
 #define TSTORM_MAC_FILTER_CONFIG_OFFSET(function) \
 	(IS_E1H_OFFSET? (0x3008 + (function * 0x38)) : (0x1508 + \
 	(function * 0x38)))
+#define TSTORM_PER_COUNTER_ID_STATS_OFFSET(port, stats_counter_id) \
+	(IS_E1H_OFFSET ? (0x2010 + (port * 0x5b0) + (stats_counter_id * \
+	0x50)) : (0x4000 + (port * 0x3f0) + (stats_counter_id * 0x38)))
 #define TSTORM_RX_PRODS_OFFSET(port, client_id) \
 	(IS_E1H_OFFSET? (0x3350 + (port * 0x3e8) + (client_id * 0x28)) : \
 	(0x9c0 + (port * 0x2f8) + (client_id * 0x28)))
@@ -157,6 +160,9 @@
 	(IS_E1H_OFFSET? 0x2ac8 : 0xffffffff)
 #define XSTORM_HC_BTR_OFFSET(port) \
 	(IS_E1H_OFFSET? (0xa144 + (port * 0x30)) : (0x1454 + (port * 0x18)))
+#define XSTORM_PER_COUNTER_ID_STATS_OFFSET(port, stats_counter_id) \
+	(IS_E1H_OFFSET ? (0xc000 + (port * 0x3f0) + (stats_counter_id * \
+	0x38)) : (0x3378 + (port * 0x3f0) + (stats_counter_id * 0x38)))
 #define XSTORM_RATE_SHAPING_PER_VN_VARS_OFFSET(function) \
 	(IS_E1H_OFFSET? (0x2528 + (function * 0x70)) : (0x3c20 + \
 	(function * 0x70)))

drivers/net/bnx2x_reg.h

@@ -1727,6 +1727,9 @@
 /* [R 32] Rx statistics : In user packets discarded due to BRB backpressure
    for port0 */
 #define NIG_REG_STAT0_BRB_DISCARD				 0x105f0
+/* [R 32] Rx statistics : In user packets truncated due to BRB backpressure
+   for port0 */
+#define NIG_REG_STAT0_BRB_TRUNCATE				 0x105f8
 /* [WB_R 36] Tx statistics : Number of packets from emac0 or bmac0 that
    between 1024 and 1522 bytes for port0 */
 #define NIG_REG_STAT0_EGRESS_MAC_PKT0				 0x10750