[RFC v2 08/24] eth: bnxt: set page pool page order based on rx_page_size

[Pavel Begunkov]

From: Jakub Kicinski <kuba@xxxxxxxxxx>

If user decides to increase the buffer size for agg ring
we need to ask the page pool for higher order pages.
There is no need to use larger pages for header frags,
if user increase the size of agg ring buffers switch
to separate header page automatically.

Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
[pavel: calculate adjust max_len]
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 7d35e9a8869b..869c15d4dc34 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -3818,12 +3818,14 @@ static int bnxt_alloc_rx_page_pool(struct bnxt *bp,
 	pp.pool_size = bp->rx_agg_ring_size / agg_size_fac;
 	if (BNXT_RX_PAGE_MODE(bp))
 		pp.pool_size += bp->rx_ring_size / rx_size_fac;
+
+	pp.order = get_order(bp->rx_page_size);
 	pp.nid = numa_node;
 	pp.napi = &rxr->bnapi->napi;
 	pp.netdev = bp->dev;
 	pp.dev = &bp->pdev->dev;
 	pp.dma_dir = bp->rx_dir;
-	pp.max_len = PAGE_SIZE;
+	pp.max_len = PAGE_SIZE << pp.order;
 	pp.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV |
 		   PP_FLAG_ALLOW_UNREADABLE_NETMEM;
 	pp.queue_idx = rxr->bnapi->index;
@@ -3834,7 +3836,10 @@ static int bnxt_alloc_rx_page_pool(struct bnxt *bp,
 	rxr->page_pool = pool;
 
 	rxr->need_head_pool = page_pool_is_unreadable(pool);
+	rxr->need_head_pool |= !!pp.order;
 	if (bnxt_separate_head_pool(rxr)) {
+		pp.order = 0;
+		pp.max_len = PAGE_SIZE;
 		pp.pool_size = min(bp->rx_ring_size / rx_size_fac, 1024);
 		pp.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV;
 		pool = page_pool_create(&pp);
-- 
2.49.0