[dpdk-dev] [PATCH 3/3] net/bnxt: fix VF info allocation

[Kalesh A P <kalesh-anakkur.purayil@broadcom.com>]

From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>

1. Renamed bnxt_hwrm_alloc_vf_info()/bnxt_hwrm_free_vf_info to
   bnxt_alloc_vf_info()/bnxt_free_vf_info as it does not
   issue any HWRM command to fw.
2. Fix missing unlock when memory allocation fails.

Fixes: b7778e8a1c00 ("net/bnxt: refactor to properly allocate resources for PF/VF")
Cc: stable@dpdk.org

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Kumar Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c |  2 +-
 drivers/net/bnxt/bnxt_hwrm.c   | 94 ++++++++++++++++++++++++------------------
 drivers/net/bnxt/bnxt_hwrm.h   |  2 +-
 3 files changed, 57 insertions(+), 41 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index c55a2d8..3898849 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -1557,7 +1557,7 @@ static void bnxt_drv_uninit(struct bnxt *bp)
 	rte_memzone_free((const struct rte_memzone *)bp->rx_mem_zone);
 	bp->rx_mem_zone = NULL;
 
-	bnxt_hwrm_free_vf_info(bp);
+	bnxt_free_vf_info(bp);
 
 	rte_free(bp->grp_info);
 	bp->grp_info = NULL;
diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 5ef0845..c16edc8 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -788,10 +788,13 @@ static int bnxt_hwrm_ptp_qcfg(struct bnxt *bp)
 	return 0;
 }
 
-void bnxt_hwrm_free_vf_info(struct bnxt *bp)
+void bnxt_free_vf_info(struct bnxt *bp)
 {
 	int i;
 
+	if (bp->pf->vf_info == NULL)
+		return;
+
 	for (i = 0; i < bp->pf->max_vfs; i++) {
 		rte_free(bp->pf->vf_info[i].vlan_table);
 		bp->pf->vf_info[i].vlan_table = NULL;
@@ -802,6 +805,50 @@ void bnxt_hwrm_free_vf_info(struct bnxt *bp)
 	bp->pf->vf_info = NULL;
 }
 
+static int bnxt_alloc_vf_info(struct bnxt *bp, uint16_t max_vfs)
+{
+	struct bnxt_child_vf_info *vf_info = bp->pf->vf_info;
+	int i;
+
+	if (vf_info)
+		bnxt_free_vf_info(bp);
+
+	vf_info = rte_zmalloc("bnxt_vf_info", sizeof(*vf_info) * max_vfs, 0);
+	if (vf_info == NULL) {
+		PMD_DRV_LOG(ERR, "Failed to alloc vf info\n");
+		return -ENOMEM;
+	}
+
+	bp->pf->max_vfs = max_vfs;
+	for (i = 0; i < max_vfs; i++) {
+		vf_info[i].fid = bp->pf->first_vf_id + i;
+		vf_info[i].vlan_table = rte_zmalloc("VF VLAN table",
+						    getpagesize(), getpagesize());
+		if (vf_info[i].vlan_table == NULL) {
+			PMD_DRV_LOG(ERR, "Failed to alloc VLAN table for VF %d\n", i);
+			goto err;
+		}
+		rte_mem_lock_page(vf_info[i].vlan_table);
+
+		vf_info[i].vlan_as_table = rte_zmalloc("VF VLAN AS table",
+						       getpagesize(), getpagesize());
+		if (vf_info[i].vlan_as_table == NULL) {
+			PMD_DRV_LOG(ERR, "Failed to alloc VLAN AS table for VF %d\n", i);
+			goto err;
+		}
+		rte_mem_lock_page(vf_info[i].vlan_as_table);
+
+		STAILQ_INIT(&vf_info[i].filter);
+	}
+
+	bp->pf->vf_info = vf_info;
+
+	return 0;
+err:
+	bnxt_free_vf_info(bp);
+	return -ENOMEM;
+}
+
 static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 {
 	int rc = 0;
@@ -809,7 +856,6 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 	struct hwrm_func_qcaps_output *resp = bp->hwrm_cmd_resp_addr;
 	uint16_t new_max_vfs;
 	uint32_t flags;
-	int i;
 
 	HWRM_PREP(&req, HWRM_FUNC_QCAPS, BNXT_USE_CHIMP_MB);
 
@@ -827,43 +873,9 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 		bp->pf->total_vfs = rte_le_to_cpu_16(resp->max_vfs);
 		new_max_vfs = bp->pdev->max_vfs;
 		if (new_max_vfs != bp->pf->max_vfs) {
-			if (bp->pf->vf_info)
-				bnxt_hwrm_free_vf_info(bp);
-			bp->pf->vf_info = rte_zmalloc("bnxt_vf_info",
-			    sizeof(bp->pf->vf_info[0]) * new_max_vfs, 0);
-			if (bp->pf->vf_info == NULL) {
-				PMD_DRV_LOG(ERR, "Alloc vf info fail\n");
-				HWRM_UNLOCK();
-				return -ENOMEM;
-			}
-			bp->pf->max_vfs = new_max_vfs;
-			for (i = 0; i < new_max_vfs; i++) {
-				bp->pf->vf_info[i].fid =
-					bp->pf->first_vf_id + i;
-				bp->pf->vf_info[i].vlan_table =
-					rte_zmalloc("VF VLAN table",
-						    getpagesize(),
-						    getpagesize());
-				if (bp->pf->vf_info[i].vlan_table == NULL)
-					PMD_DRV_LOG(ERR,
-					"Fail to alloc VLAN table for VF %d\n",
-					i);
-				else
-					rte_mem_lock_page(
-						bp->pf->vf_info[i].vlan_table);
-				bp->pf->vf_info[i].vlan_as_table =
-					rte_zmalloc("VF VLAN AS table",
-						    getpagesize(),
-						    getpagesize());
-				if (bp->pf->vf_info[i].vlan_as_table == NULL)
-					PMD_DRV_LOG(ERR,
-					"Alloc VLAN AS table for VF %d fail\n",
-					i);
-				else
-					rte_mem_lock_page(
-					      bp->pf->vf_info[i].vlan_as_table);
-				STAILQ_INIT(&bp->pf->vf_info[i].filter);
-			}
+			rc = bnxt_alloc_vf_info(bp, new_max_vfs);
+			if (rc)
+				goto unlock;
 		}
 	}
 
@@ -922,6 +934,7 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 	if (flags & HWRM_FUNC_QCAPS_OUTPUT_FLAGS_LINK_ADMIN_STATUS_SUPPORTED)
 		bp->fw_cap |= BNXT_FW_CAP_LINK_ADMIN;
 
+unlock:
 	HWRM_UNLOCK();
 
 	return rc;
@@ -932,6 +945,9 @@ int bnxt_hwrm_func_qcaps(struct bnxt *bp)
 	int rc;
 
 	rc = __bnxt_hwrm_func_qcaps(bp);
+	if (rc == -ENOMEM)
+		return rc;
+
 	if (!rc && bp->hwrm_spec_code >= HWRM_SPEC_CODE_1_8_3) {
 		rc = bnxt_alloc_ctx_mem(bp);
 		if (rc)
diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index 3d05acf..0c2e32c 100644
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -297,7 +297,7 @@ int bnxt_hwrm_port_phy_qcaps(struct bnxt *bp);
 int bnxt_hwrm_oem_cmd(struct bnxt *bp, uint32_t entry_num);
 int bnxt_clear_one_vnic_filter(struct bnxt *bp,
 			       struct bnxt_filter_info *filter);
-void bnxt_hwrm_free_vf_info(struct bnxt *bp);
+void bnxt_free_vf_info(struct bnxt *bp);
 int bnxt_hwrm_first_vf_id_query(struct bnxt *bp, uint16_t fid,
 				uint16_t *first_vf_id);
 int bnxt_hwrm_cfa_pair_alloc(struct bnxt *bp, struct bnxt_representor *rep);
-- 
2.10.1