6.14-stable review patch. If anyone has any objections, please let me know.
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From: Haiyang Zhang haiyangz@microsoft.com
commit fa37a8849634db2dd3545116873da8cf4b1e67c6 upstream.
Frag allocators, such as netdev_alloc_frag(), were not designed to work for fragsz > PAGE_SIZE.
So, switch to page pool for jumbo frames instead of using page frag allocators. This driver is using page pool for smaller MTUs already.
Cc: stable@vger.kernel.org Fixes: 80f6215b450e ("net: mana: Add support for jumbo frame") Signed-off-by: Haiyang Zhang haiyangz@microsoft.com Reviewed-by: Long Li longli@microsoft.com Reviewed-by: Shradha Gupta shradhagupta@linux.microsoft.com Link: https://patch.msgid.link/1742920357-27263-1-git-send-email-haiyangz@microsof... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/microsoft/mana/mana_en.c | 46 +++++--------------------- 1 file changed, 9 insertions(+), 37 deletions(-)
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -652,30 +652,16 @@ int mana_pre_alloc_rxbufs(struct mana_po mpc->rxbpre_total = 0;
for (i = 0; i < num_rxb; i++) { - if (mpc->rxbpre_alloc_size > PAGE_SIZE) { - va = netdev_alloc_frag(mpc->rxbpre_alloc_size); - if (!va) - goto error; - - page = virt_to_head_page(va); - /* Check if the frag falls back to single page */ - if (compound_order(page) < - get_order(mpc->rxbpre_alloc_size)) { - put_page(page); - goto error; - } - } else { - page = dev_alloc_page(); - if (!page) - goto error; + page = dev_alloc_pages(get_order(mpc->rxbpre_alloc_size)); + if (!page) + goto error;
- va = page_to_virt(page); - } + va = page_to_virt(page);
da = dma_map_single(dev, va + mpc->rxbpre_headroom, mpc->rxbpre_datasize, DMA_FROM_DEVICE); if (dma_mapping_error(dev, da)) { - put_page(virt_to_head_page(va)); + put_page(page); goto error; }
@@ -1660,7 +1646,7 @@ drop: }
static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev, - dma_addr_t *da, bool *from_pool, bool is_napi) + dma_addr_t *da, bool *from_pool) { struct page *page; void *va; @@ -1671,21 +1657,6 @@ static void *mana_get_rxfrag(struct mana if (rxq->xdp_save_va) { va = rxq->xdp_save_va; rxq->xdp_save_va = NULL; - } else if (rxq->alloc_size > PAGE_SIZE) { - if (is_napi) - va = napi_alloc_frag(rxq->alloc_size); - else - va = netdev_alloc_frag(rxq->alloc_size); - - if (!va) - return NULL; - - page = virt_to_head_page(va); - /* Check if the frag falls back to single page */ - if (compound_order(page) < get_order(rxq->alloc_size)) { - put_page(page); - return NULL; - } } else { page = page_pool_dev_alloc_pages(rxq->page_pool); if (!page) @@ -1718,7 +1689,7 @@ static void mana_refill_rx_oob(struct de dma_addr_t da; void *va;
- va = mana_get_rxfrag(rxq, dev, &da, &from_pool, true); + va = mana_get_rxfrag(rxq, dev, &da, &from_pool); if (!va) return;
@@ -2158,7 +2129,7 @@ static int mana_fill_rx_oob(struct mana_ if (mpc->rxbufs_pre) va = mana_get_rxbuf_pre(rxq, &da); else - va = mana_get_rxfrag(rxq, dev, &da, &from_pool, false); + va = mana_get_rxfrag(rxq, dev, &da, &from_pool);
if (!va) return -ENOMEM; @@ -2244,6 +2215,7 @@ static int mana_create_page_pool(struct pprm.nid = gc->numa_node; pprm.napi = &rxq->rx_cq.napi; pprm.netdev = rxq->ndev; + pprm.order = get_order(rxq->alloc_size);
rxq->page_pool = page_pool_create(&pprm);