[dpdk-stable] patch 'net/bnxt: fix group info usage' has been queued to LTS release 17.11.1

[Yuanhan Liu <yliu@fridaylinux.org>]

Hi,

FYI, your patch has been queued to LTS release 17.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 01/26/18. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 36dd8aa0949e820fa93061907e826497383e71e5 Mon Sep 17 00:00:00 2001
From: Ajit Khaparde <ajit.khaparde@broadcom.com>
Date: Mon, 8 Jan 2018 12:24:28 -0800
Subject: [PATCH] net/bnxt: fix group info usage

[ upstream commit ee5d7bddab2751fe54bdee50ac3c9840bcc3be64 ]

Ring groups is a Rx only attribute. Make sure there are sufficient
ring groups available. Return an error if they are not available.

Fixes: 37d6161a68ba ("net/bnxt: add ring group alloc/free")

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt_cpr.c    |  1 -
 drivers/net/bnxt/bnxt_ethdev.c | 15 +++++++++++++--
 drivers/net/bnxt/bnxt_hwrm.c   | 14 ++++----------
 drivers/net/bnxt/bnxt_ring.c   |  4 +++-
 drivers/net/bnxt/bnxt_ring.h   |  2 +-
 5 files changed, 21 insertions(+), 15 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_cpr.c b/drivers/net/bnxt/bnxt_cpr.c
index 19c684c..cde8adc 100644
--- a/drivers/net/bnxt/bnxt_cpr.c
+++ b/drivers/net/bnxt/bnxt_cpr.c
@@ -165,7 +165,6 @@ int bnxt_alloc_def_cp_ring(struct bnxt *bp)
 		goto err_out;
 	cpr->cp_doorbell = bp->pdev->mem_resource[2].addr;
 	B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
-	bp->grp_info[0].cp_fw_ring_id = cp_ring->fw_ring_id;
 	if (BNXT_PF(bp))
 		rc = bnxt_hwrm_func_cfg_def_cp(bp);
 	else
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 3b6813c..7832e20 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -393,7 +393,10 @@ static int bnxt_init_nic(struct bnxt *bp)
 {
 	int rc;
 
-	bnxt_init_ring_grps(bp);
+	rc = bnxt_init_ring_grps(bp);
+	if (rc)
+		return rc;
+
 	bnxt_init_vnics(bp);
 	bnxt_init_filters(bp);
 
@@ -2939,11 +2942,19 @@ skip_init:
 	/* Copy the permanent MAC from the qcap response address now. */
 	memcpy(bp->mac_addr, bp->dflt_mac_addr, sizeof(bp->mac_addr));
 	memcpy(&eth_dev->data->mac_addrs[0], bp->mac_addr, ETHER_ADDR_LEN);
+
+	if (bp->max_ring_grps < bp->rx_cp_nr_rings) {
+		/* 1 ring is for default completion ring */
+		RTE_LOG(ERR, PMD, "Insufficient resource: Ring Group\n");
+		rc = -ENOSPC;
+		goto error_free;
+	}
+
 	bp->grp_info = rte_zmalloc("bnxt_grp_info",
 				sizeof(*bp->grp_info) * bp->max_ring_grps, 0);
 	if (!bp->grp_info) {
 		RTE_LOG(ERR, PMD,
-			"Failed to alloc %zu bytes needed to store group info table\n",
+			"Failed to alloc %zu bytes to store group info table\n",
 			sizeof(*bp->grp_info) * bp->max_ring_grps);
 		rc = -ENOMEM;
 		goto error_free;
diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index d2c800d..564e3f7 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -1046,7 +1046,6 @@ int bnxt_hwrm_stat_ctx_alloc(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 	cpr->hw_stats_ctx_id = rte_le_to_cpu_16(resp->stat_ctx_id);
 
 	HWRM_UNLOCK();
-	bp->grp_info[idx].fw_stats_ctx = cpr->hw_stats_ctx_id;
 
 	return rc;
 }
@@ -1569,19 +1568,15 @@ int bnxt_free_all_hwrm_stat_ctxs(struct bnxt *bp)
 
 	for (i = 0; i < bp->rx_cp_nr_rings + bp->tx_cp_nr_rings; i++) {
 
-		if (i >= bp->rx_cp_nr_rings)
+		if (i >= bp->rx_cp_nr_rings) {
 			cpr = bp->tx_queues[i - bp->rx_cp_nr_rings]->cp_ring;
-		else
+		} else {
 			cpr = bp->rx_queues[i]->cp_ring;
+			bp->grp_info[i].fw_stats_ctx = -1;
+		}
 		if (cpr->hw_stats_ctx_id != HWRM_NA_SIGNATURE) {
 			rc = bnxt_hwrm_stat_ctx_free(bp, cpr, i);
 			cpr->hw_stats_ctx_id = HWRM_NA_SIGNATURE;
-			/*
-			 * TODO. Need a better way to reset grp_info.stats_ctx
-			 * for Rx rings only. stats_ctx is not saved for Tx
-			 * in grp_info.
-			 */
-			bp->grp_info[i].fw_stats_ctx = cpr->hw_stats_ctx_id;
 			if (rc)
 				return rc;
 		}
@@ -1641,7 +1636,6 @@ static void bnxt_free_cp_ring(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 	bnxt_hwrm_ring_free(bp, cp_ring,
 			HWRM_RING_FREE_INPUT_RING_TYPE_L2_CMPL);
 	cp_ring->fw_ring_id = INVALID_HW_RING_ID;
-	bp->grp_info[idx].cp_fw_ring_id = INVALID_HW_RING_ID;
 	memset(cpr->cp_desc_ring, 0, cpr->cp_ring_struct->ring_size *
 			sizeof(*cpr->cp_desc_ring));
 	cpr->cp_raw_cons = 0;
diff --git a/drivers/net/bnxt/bnxt_ring.c b/drivers/net/bnxt/bnxt_ring.c
index e0ca0e7..59d1035 100644
--- a/drivers/net/bnxt/bnxt_ring.c
+++ b/drivers/net/bnxt/bnxt_ring.c
@@ -63,13 +63,15 @@ void bnxt_free_ring(struct bnxt_ring *ring)
  * Ring groups
  */
 
-void bnxt_init_ring_grps(struct bnxt *bp)
+int bnxt_init_ring_grps(struct bnxt *bp)
 {
 	unsigned int i;
 
 	for (i = 0; i < bp->max_ring_grps; i++)
 		memset(&bp->grp_info[i], (uint8_t)HWRM_NA_SIGNATURE,
 		       sizeof(struct bnxt_ring_grp_info));
+
+	return 0;
 }
 
 /*
diff --git a/drivers/net/bnxt/bnxt_ring.h b/drivers/net/bnxt/bnxt_ring.h
index 164f482..a88ab55 100644
--- a/drivers/net/bnxt/bnxt_ring.h
+++ b/drivers/net/bnxt/bnxt_ring.h
@@ -94,7 +94,7 @@ struct bnxt_tx_ring_info;
 struct bnxt_rx_ring_info;
 struct bnxt_cp_ring_info;
 void bnxt_free_ring(struct bnxt_ring *ring);
-void bnxt_init_ring_grps(struct bnxt *bp);
+int bnxt_init_ring_grps(struct bnxt *bp);
 int bnxt_alloc_rings(struct bnxt *bp, uint16_t qidx,
 			    struct bnxt_tx_ring_info *tx_ring_info,
 			    struct bnxt_rx_ring_info *rx_ring_info,
-- 
2.7.4