bnx2x: Support statistics collection for VFs by the PF

Statistics are collected by the PF driver. The collection is
performed via a query sent to the device which is basically an array
of 3-tuples of the form (statistics client, function, DMAE address).
In this patch the PF driver adds to the query, on top of the
statistics clients it is maintaining for itself (rss queues, storage,
etc), the 3-tuples for the VFs it is maintaining. The addresses used
are the GPAs of the statistics buffers supplied by the VF in the
init message on the VF <-> PF channel. The function parameter
ensures that the iommu will translate the GPA to the correct physical
address.

Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 89 insertions, 21 deletions

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c
index 89ec0667140a..93a8e7430c59 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c
@@ -19,7 +19,7 @@
 
 #include "bnx2x_stats.h"
 #include "bnx2x_cmn.h"
-
+#include "bnx2x_sriov.h"
 
 /* Statistics */
 
@@ -79,6 +79,42 @@ static inline u16 bnx2x_get_port_stats_dma_len(struct bnx2x *bp)
  * Init service functions
  */
 
+static void bnx2x_dp_stats(struct bnx2x *bp)
+{
+	int i;
+
+	DP(BNX2X_MSG_STATS, "dumping stats:\n"
+	   "fw_stats_req\n"
+	   "    hdr\n"
+	   "        cmd_num %d\n"
+	   "        reserved0 %d\n"
+	   "        drv_stats_counter %d\n"
+	   "        reserved1 %d\n"
+	   "        stats_counters_addrs %x %x\n",
+	   bp->fw_stats_req->hdr.cmd_num,
+	   bp->fw_stats_req->hdr.reserved0,
+	   bp->fw_stats_req->hdr.drv_stats_counter,
+	   bp->fw_stats_req->hdr.reserved1,
+	   bp->fw_stats_req->hdr.stats_counters_addrs.hi,
+	   bp->fw_stats_req->hdr.stats_counters_addrs.lo);
+
+	for (i = 0; i < bp->fw_stats_req->hdr.cmd_num; i++) {
+		DP(BNX2X_MSG_STATS,
+		   "query[%d]\n"
+		   "              kind %d\n"
+		   "              index %d\n"
+		   "              funcID %d\n"
+		   "              reserved %d\n"
+		   "              address %x %x\n",
+		   i, bp->fw_stats_req->query[i].kind,
+		   bp->fw_stats_req->query[i].index,
+		   bp->fw_stats_req->query[i].funcID,
+		   bp->fw_stats_req->query[i].reserved,
+		   bp->fw_stats_req->query[i].address.hi,
+		   bp->fw_stats_req->query[i].address.lo);
+	}
+}
+
 /* Post the next statistics ramrod. Protect it with the spin in
  * order to ensure the strict order between statistics ramrods
  * (each ramrod has a sequence number passed in a
@@ -103,7 +139,9 @@ static void bnx2x_storm_stats_post(struct bnx2x *bp)
 		DP(BNX2X_MSG_STATS, "Sending statistics ramrod %d\n",
 			bp->fw_stats_req->hdr.drv_stats_counter);
 
-
+		/* adjust the ramrod to include VF queues statistics */
+		bnx2x_iov_adjust_stats_req(bp);
+		bnx2x_dp_stats(bp);
 
 		/* send FW stats ramrod */
 		rc = bnx2x_sp_post(bp, RAMROD_CMD_ID_COMMON_STAT_QUERY, 0,
@@ -482,6 +520,12 @@ static void bnx2x_func_stats_init(struct bnx2x *bp)
 
 static void bnx2x_stats_start(struct bnx2x *bp)
 {
+	/* vfs travel through here as part of the statistics FSM, but no action
+	 * is required
+	 */
+	if (IS_VF(bp))
+		return;
+
 	if (bp->port.pmf)
 		bnx2x_port_stats_init(bp);
 
@@ -501,6 +545,11 @@ static void bnx2x_stats_pmf_start(struct bnx2x *bp)
 
 static void bnx2x_stats_restart(struct bnx2x *bp)
 {
+	/* vfs travel through here as part of the statistics FSM, but no action
+	 * is required
+	 */
+	if (IS_VF(bp))
+		return;
 	bnx2x_stats_comp(bp);
 	bnx2x_stats_start(bp);
 }
@@ -832,19 +881,10 @@ static int bnx2x_hw_stats_update(struct bnx2x *bp)
 	return 0;
 }
 
-static int bnx2x_storm_stats_update(struct bnx2x *bp)
+static int bnx2x_storm_stats_validate_counters(struct bnx2x *bp)
 {
-	struct tstorm_per_port_stats *tport =
-				&bp->fw_stats_data->port.tstorm_port_statistics;
-	struct tstorm_per_pf_stats *tfunc =
-				&bp->fw_stats_data->pf.tstorm_pf_statistics;
-	struct host_func_stats *fstats = &bp->func_stats;
-	struct bnx2x_eth_stats *estats = &bp->eth_stats;
-	struct bnx2x_eth_stats_old *estats_old = &bp->eth_stats_old;
 	struct stats_counter *counters = &bp->fw_stats_data->storm_counters;
-	int i;
 	u16 cur_stats_counter;
-
 	/* Make sure we use the value of the counter
 	 * used for sending the last stats ramrod.
 	 */
@@ -880,6 +920,23 @@ static int bnx2x_storm_stats_update(struct bnx2x *bp)
 		   le16_to_cpu(counters->tstats_counter), bp->stats_counter);
 		return -EAGAIN;
 	}
+	return 0;
+}
+
+static int bnx2x_storm_stats_update(struct bnx2x *bp)
+{
+	struct tstorm_per_port_stats *tport =
+				&bp->fw_stats_data->port.tstorm_port_statistics;
+	struct tstorm_per_pf_stats *tfunc =
+				&bp->fw_stats_data->pf.tstorm_pf_statistics;
+	struct host_func_stats *fstats = &bp->func_stats;
+	struct bnx2x_eth_stats *estats = &bp->eth_stats;
+	struct bnx2x_eth_stats_old *estats_old = &bp->eth_stats_old;
+	int i;
+
+	/* vfs stat counter is managed by pf */
+	if (IS_PF(bp) && bnx2x_storm_stats_validate_counters(bp))
+		return -EAGAIN;
 
 	estats->error_bytes_received_hi = 0;
 	estats->error_bytes_received_lo = 0;
@@ -1174,23 +1231,34 @@ static void bnx2x_stats_update(struct bnx2x *bp)
 	if (bnx2x_edebug_stats_stopped(bp))
 		return;
 
-	if (*stats_comp != DMAE_COMP_VAL)
-		return;
+	if (IS_PF(bp)) {
+		if (*stats_comp != DMAE_COMP_VAL)
+			return;
 
-	if (bp->port.pmf)
-		bnx2x_hw_stats_update(bp);
+		if (bp->port.pmf)
+			bnx2x_hw_stats_update(bp);
 
-	if (bnx2x_storm_stats_update(bp)) {
-		if (bp->stats_pending++ == 3) {
-			BNX2X_ERR("storm stats were not updated for 3 times\n");
-			bnx2x_panic();
+		if (bnx2x_storm_stats_update(bp)) {
+			if (bp->stats_pending++ == 3) {
+				BNX2X_ERR("storm stats were not updated for 3 times\n");
+				bnx2x_panic();
+			}
+			return;
 		}
-		return;
+	} else {
+		/* vf doesn't collect HW statistics, and doesn't get completions
+		 * perform only update
+		 */
+		bnx2x_storm_stats_update(bp);
 	}
 
 	bnx2x_net_stats_update(bp);
 	bnx2x_drv_stats_update(bp);
 
+	/* vf is done */
+	if (IS_VF(bp))
+		return;
+
 	if (netif_msg_timer(bp)) {
 		struct bnx2x_eth_stats *estats = &bp->eth_stats;