From: Michael Chan michael.chan@broadcom.com
[ Upstream commit accd7e23693aaaa9aa0d3e9eca0ae77d1be80ab3 ]
The driver needs to keep track of all the possible concurrent TPA (GRO/LRO) completions on the aggregation ring. On P5 chips, the maximum number of concurrent TPA is 256 and the amount of memory we allocate is order-5 on systems using 4K pages. Memory allocation failure has been reported:
NetworkManager: page allocation failure: order:5, mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null),cpuset=/,mems_allowed=0-1 CPU: 15 PID: 2995 Comm: NetworkManager Kdump: loaded Not tainted 5.10.156 #1 Hardware name: Dell Inc. PowerEdge R660/0M1CC5, BIOS 0.2.25 08/12/2022 Call Trace: dump_stack+0x57/0x6e warn_alloc.cold.120+0x7b/0xdd ? _cond_resched+0x15/0x30 ? __alloc_pages_direct_compact+0x15f/0x170 __alloc_pages_slowpath.constprop.108+0xc58/0xc70 __alloc_pages_nodemask+0x2d0/0x300 kmalloc_order+0x24/0xe0 kmalloc_order_trace+0x19/0x80 bnxt_alloc_mem+0x1150/0x15c0 [bnxt_en] ? bnxt_get_func_stat_ctxs+0x13/0x60 [bnxt_en] __bnxt_open_nic+0x12e/0x780 [bnxt_en] bnxt_open+0x10b/0x240 [bnxt_en] __dev_open+0xe9/0x180 __dev_change_flags+0x1af/0x220 dev_change_flags+0x21/0x60 do_setlink+0x35c/0x1100
Instead of allocating this big chunk of memory and dividing it up for the concurrent TPA instances, allocate each small chunk separately for each TPA instance. This will reduce it to order-0 allocations.
Fixes: 79632e9ba386 ("bnxt_en: Expand bnxt_tpa_info struct to support 57500 chips.") Reviewed-by: Somnath Kotur somnath.kotur@broadcom.com Reviewed-by: Damodharam Ammepalli damodharam.ammepalli@broadcom.com Reviewed-by: Pavan Chebbi pavan.chebbi@broadcom.com Signed-off-by: Michael Chan michael.chan@broadcom.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 6c32f5c427b52..25d1642c10c3b 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -3146,7 +3146,7 @@ static int bnxt_alloc_ring(struct bnxt *bp, struct bnxt_ring_mem_info *rmem)
static void bnxt_free_tpa_info(struct bnxt *bp) { - int i; + int i, j;
for (i = 0; i < bp->rx_nr_rings; i++) { struct bnxt_rx_ring_info *rxr = &bp->rx_ring[i]; @@ -3154,8 +3154,10 @@ static void bnxt_free_tpa_info(struct bnxt *bp) kfree(rxr->rx_tpa_idx_map); rxr->rx_tpa_idx_map = NULL; if (rxr->rx_tpa) { - kfree(rxr->rx_tpa[0].agg_arr); - rxr->rx_tpa[0].agg_arr = NULL; + for (j = 0; j < bp->max_tpa; j++) { + kfree(rxr->rx_tpa[j].agg_arr); + rxr->rx_tpa[j].agg_arr = NULL; + } } kfree(rxr->rx_tpa); rxr->rx_tpa = NULL; @@ -3164,14 +3166,13 @@ static void bnxt_free_tpa_info(struct bnxt *bp)
static int bnxt_alloc_tpa_info(struct bnxt *bp) { - int i, j, total_aggs = 0; + int i, j;
bp->max_tpa = MAX_TPA; if (bp->flags & BNXT_FLAG_CHIP_P5) { if (!bp->max_tpa_v2) return 0; bp->max_tpa = max_t(u16, bp->max_tpa_v2, MAX_TPA_P5); - total_aggs = bp->max_tpa * MAX_SKB_FRAGS; }
for (i = 0; i < bp->rx_nr_rings; i++) { @@ -3185,12 +3186,12 @@ static int bnxt_alloc_tpa_info(struct bnxt *bp)
if (!(bp->flags & BNXT_FLAG_CHIP_P5)) continue; - agg = kcalloc(total_aggs, sizeof(*agg), GFP_KERNEL); - rxr->rx_tpa[0].agg_arr = agg; - if (!agg) - return -ENOMEM; - for (j = 1; j < bp->max_tpa; j++) - rxr->rx_tpa[j].agg_arr = agg + j * MAX_SKB_FRAGS; + for (j = 0; j < bp->max_tpa; j++) { + agg = kcalloc(MAX_SKB_FRAGS, sizeof(*agg), GFP_KERNEL); + if (!agg) + return -ENOMEM; + rxr->rx_tpa[j].agg_arr = agg; + } rxr->rx_tpa_idx_map = kzalloc(sizeof(*rxr->rx_tpa_idx_map), GFP_KERNEL); if (!rxr->rx_tpa_idx_map)