6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: David Wei <dw@xxxxxxxxxxx>
[ Upstream commit bd649c5cc958169b8a8a3e77ea926d92d472b02a ]
Commit 7ed816be35ab ("eth: bnxt: use page pool for head frags") added a
page pool for header frags, which may be distinct from the existing pool
for the aggregation ring. Prior to this change, frags used in the TPA
ring rx_tpa were allocated from system memory e.g. napi_alloc_frag()
meaning their lifetimes were not associated with a page pool. They can
be returned at any time and so the queue API did not alloc or free
rx_tpa.
But now frags come from a separate head_pool which may be different to
page_pool. Without allocating and freeing rx_tpa, frags allocated from
the old head_pool may be returned to a different new head_pool which
causes a mismatch between the pp hold/release count.
Fix this problem by properly freeing and allocating rx_tpa in the queue
API implementation.
Signed-off-by: David Wei <dw@xxxxxxxxxxx>
Reviewed-by: Michael Chan <michael.chan@xxxxxxxxxxxx>
Link: https://patch.msgid.link/20241204041022.56512-4-dw@xxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Stable-dep-of: 87dd2850835d ("eth: bnxt: fix memory leak in queue reset")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 27 +++++++++++++++++++----
1 file changed, 23 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 800a63daba2b4..ee52ac821ef9a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -3623,7 +3623,7 @@ static void bnxt_free_rx_rings(struct bnxt *bp)
xdp_rxq_info_unreg(&rxr->xdp_rxq);
page_pool_destroy(rxr->page_pool);
- if (rxr->page_pool != rxr->head_pool)
+ if (bnxt_separate_head_pool())
page_pool_destroy(rxr->head_pool);
rxr->page_pool = rxr->head_pool = NULL;
@@ -15199,15 +15199,25 @@ static int bnxt_queue_mem_alloc(struct net_device *dev, void *qmem, int idx)
goto err_free_rx_agg_ring;
}
+ if (bp->flags & BNXT_FLAG_TPA) {
+ rc = bnxt_alloc_one_tpa_info(bp, clone);
+ if (rc)
+ goto err_free_tpa_info;
+ }
+
bnxt_init_one_rx_ring_rxbd(bp, clone);
bnxt_init_one_rx_agg_ring_rxbd(bp, clone);
bnxt_alloc_one_rx_ring_skb(bp, clone, idx);
if (bp->flags & BNXT_FLAG_AGG_RINGS)
bnxt_alloc_one_rx_ring_page(bp, clone, idx);
+ if (bp->flags & BNXT_FLAG_TPA)
+ bnxt_alloc_one_tpa_info_data(bp, clone);
return 0;
+err_free_tpa_info:
+ bnxt_free_one_tpa_info(bp, clone);
err_free_rx_agg_ring:
bnxt_free_ring(bp, &clone->rx_agg_ring_struct.ring_mem);
err_free_rx_ring:
@@ -15215,9 +15225,11 @@ static int bnxt_queue_mem_alloc(struct net_device *dev, void *qmem, int idx)
err_rxq_info_unreg:
xdp_rxq_info_unreg(&clone->xdp_rxq);
err_page_pool_destroy:
- clone->page_pool->p.napi = NULL;
page_pool_destroy(clone->page_pool);
+ if (bnxt_separate_head_pool())
+ page_pool_destroy(clone->head_pool);
clone->page_pool = NULL;
+ clone->head_pool = NULL;
return rc;
}
@@ -15227,13 +15239,15 @@ static void bnxt_queue_mem_free(struct net_device *dev, void *qmem)
struct bnxt *bp = netdev_priv(dev);
struct bnxt_ring_struct *ring;
- bnxt_free_one_rx_ring(bp, rxr);
- bnxt_free_one_rx_agg_ring(bp, rxr);
+ bnxt_free_one_rx_ring_skbs(bp, rxr);
xdp_rxq_info_unreg(&rxr->xdp_rxq);
page_pool_destroy(rxr->page_pool);
+ if (bnxt_separate_head_pool())
+ page_pool_destroy(rxr->head_pool);
rxr->page_pool = NULL;
+ rxr->head_pool = NULL;
ring = &rxr->rx_ring_struct;
bnxt_free_ring(bp, &ring->ring_mem);
@@ -15315,7 +15329,10 @@ static int bnxt_queue_start(struct net_device *dev, void *qmem, int idx)
rxr->rx_agg_prod = clone->rx_agg_prod;
rxr->rx_sw_agg_prod = clone->rx_sw_agg_prod;
rxr->rx_next_cons = clone->rx_next_cons;
+ rxr->rx_tpa = clone->rx_tpa;
+ rxr->rx_tpa_idx_map = clone->rx_tpa_idx_map;
rxr->page_pool = clone->page_pool;
+ rxr->head_pool = clone->head_pool;
rxr->xdp_rxq = clone->xdp_rxq;
bnxt_copy_rx_ring(bp, rxr, clone);
@@ -15376,6 +15393,8 @@ static int bnxt_queue_stop(struct net_device *dev, void *qmem, int idx)
bnxt_hwrm_rx_agg_ring_free(bp, rxr, false);
rxr->rx_next_cons = 0;
page_pool_disable_direct_recycling(rxr->page_pool);
+ if (bnxt_separate_head_pool())
+ page_pool_disable_direct_recycling(rxr->head_pool);
memcpy(qmem, rxr, sizeof(*rxr));
bnxt_init_rx_ring_struct(bp, qmem);
--
2.39.5
