diff options
Diffstat (limited to 'target/linux/mvebu/patches-5.4/004-net-mvneta-introduce-page-pool-API-for-sw-buffer-man.patch')
| -rw-r--r-- | target/linux/mvebu/patches-5.4/004-net-mvneta-introduce-page-pool-API-for-sw-buffer-man.patch | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/target/linux/mvebu/patches-5.4/004-net-mvneta-introduce-page-pool-API-for-sw-buffer-man.patch b/target/linux/mvebu/patches-5.4/004-net-mvneta-introduce-page-pool-API-for-sw-buffer-man.patch deleted file mode 100644 index fbcae20f74..0000000000 --- a/target/linux/mvebu/patches-5.4/004-net-mvneta-introduce-page-pool-API-for-sw-buffer-man.patch +++ /dev/null @@ -1,181 +0,0 @@ -From 568a3fa24a95476d40afe3f8616bafb543bc4182 Mon Sep 17 00:00:00 2001 -From: Lorenzo Bianconi <lorenzo@kernel.org> -Date: Sat, 19 Oct 2019 10:13:22 +0200 -Subject: [PATCH 2/7] net: mvneta: introduce page pool API for sw buffer - manager - -Use the page_pool api for allocations and DMA handling instead of -__dev_alloc_page()/dma_map_page() and free_page()/dma_unmap_page(). -Pages are unmapped using page_pool_release_page before packets -go into the network stack. - -The page_pool API offers buffer recycling capabilities for XDP but -allocates one page per packet, unless the driver splits and manages -the allocated page. -This is a preliminary patch to add XDP support to mvneta driver - -Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> -Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> -Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> -Signed-off-by: David S. Miller <davem@davemloft.net> ---- - drivers/net/ethernet/marvell/Kconfig | 1 + - drivers/net/ethernet/marvell/mvneta.c | 83 +++++++++++++++++++++------ - 2 files changed, 65 insertions(+), 19 deletions(-) - ---- a/drivers/net/ethernet/marvell/Kconfig -+++ b/drivers/net/ethernet/marvell/Kconfig -@@ -61,6 +61,7 @@ config MVNETA - depends on ARCH_MVEBU || COMPILE_TEST - select MVMDIO - select PHYLINK -+ select PAGE_POOL - ---help--- - This driver supports the network interface units in the - Marvell ARMADA XP, ARMADA 370, ARMADA 38x and ---- a/drivers/net/ethernet/marvell/mvneta.c -+++ b/drivers/net/ethernet/marvell/mvneta.c -@@ -37,6 +37,7 @@ - #include <net/ip.h> - #include <net/ipv6.h> - #include <net/tso.h> -+#include <net/page_pool.h> - - /* Registers */ - #define MVNETA_RXQ_CONFIG_REG(q) (0x1400 + ((q) << 2)) -@@ -607,6 +608,10 @@ struct mvneta_rx_queue { - u32 pkts_coal; - u32 time_coal; - -+ /* page_pool */ -+ struct page_pool *page_pool; -+ struct xdp_rxq_info xdp_rxq; -+ - /* Virtual address of the RX buffer */ - void **buf_virt_addr; - -@@ -1825,23 +1830,21 @@ static int mvneta_rx_refill(struct mvnet - struct mvneta_rx_queue *rxq, - gfp_t gfp_mask) - { -+ enum dma_data_direction dma_dir; - dma_addr_t phys_addr; - struct page *page; - -- page = __dev_alloc_page(gfp_mask); -+ page = page_pool_alloc_pages(rxq->page_pool, -+ gfp_mask | __GFP_NOWARN); - if (!page) - return -ENOMEM; - -- /* map page for use */ -- phys_addr = dma_map_page(pp->dev->dev.parent, page, 0, PAGE_SIZE, -- DMA_FROM_DEVICE); -- if (unlikely(dma_mapping_error(pp->dev->dev.parent, phys_addr))) { -- __free_page(page); -- return -ENOMEM; -- } -- -- phys_addr += pp->rx_offset_correction; -+ phys_addr = page_pool_get_dma_addr(page) + pp->rx_offset_correction; -+ dma_dir = page_pool_get_dma_dir(rxq->page_pool); -+ dma_sync_single_for_device(pp->dev->dev.parent, phys_addr, -+ PAGE_SIZE, dma_dir); - mvneta_rx_desc_fill(rx_desc, phys_addr, page, rxq); -+ - return 0; - } - -@@ -1907,10 +1910,12 @@ static void mvneta_rxq_drop_pkts(struct - if (!data || !(rx_desc->buf_phys_addr)) - continue; - -- dma_unmap_page(pp->dev->dev.parent, rx_desc->buf_phys_addr, -- PAGE_SIZE, DMA_FROM_DEVICE); -- __free_page(data); -+ page_pool_put_page(rxq->page_pool, data, false); - } -+ if (xdp_rxq_info_is_reg(&rxq->xdp_rxq)) -+ xdp_rxq_info_unreg(&rxq->xdp_rxq); -+ page_pool_destroy(rxq->page_pool); -+ rxq->page_pool = NULL; - } - - static void -@@ -2047,8 +2052,7 @@ static int mvneta_rx_swbm(struct napi_st - skb_add_rx_frag(rxq->skb, frag_num, page, - frag_offset, frag_size, - PAGE_SIZE); -- dma_unmap_page(dev->dev.parent, phys_addr, -- PAGE_SIZE, DMA_FROM_DEVICE); -+ page_pool_release_page(rxq->page_pool, page); - rxq->left_size -= frag_size; - } - } else { -@@ -2078,9 +2082,7 @@ static int mvneta_rx_swbm(struct napi_st - frag_offset, frag_size, - PAGE_SIZE); - -- dma_unmap_page(dev->dev.parent, phys_addr, -- PAGE_SIZE, DMA_FROM_DEVICE); -- -+ page_pool_release_page(rxq->page_pool, page); - rxq->left_size -= frag_size; - } - } /* Middle or Last descriptor */ -@@ -2847,11 +2849,54 @@ static int mvneta_poll(struct napi_struc - return rx_done; - } - -+static int mvneta_create_page_pool(struct mvneta_port *pp, -+ struct mvneta_rx_queue *rxq, int size) -+{ -+ struct page_pool_params pp_params = { -+ .order = 0, -+ .flags = PP_FLAG_DMA_MAP, -+ .pool_size = size, -+ .nid = cpu_to_node(0), -+ .dev = pp->dev->dev.parent, -+ .dma_dir = DMA_FROM_DEVICE, -+ }; -+ int err; -+ -+ rxq->page_pool = page_pool_create(&pp_params); -+ if (IS_ERR(rxq->page_pool)) { -+ err = PTR_ERR(rxq->page_pool); -+ rxq->page_pool = NULL; -+ return err; -+ } -+ -+ err = xdp_rxq_info_reg(&rxq->xdp_rxq, pp->dev, rxq->id); -+ if (err < 0) -+ goto err_free_pp; -+ -+ err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, -+ rxq->page_pool); -+ if (err) -+ goto err_unregister_rxq; -+ -+ return 0; -+ -+err_unregister_rxq: -+ xdp_rxq_info_unreg(&rxq->xdp_rxq); -+err_free_pp: -+ page_pool_destroy(rxq->page_pool); -+ rxq->page_pool = NULL; -+ return err; -+} -+ - /* Handle rxq fill: allocates rxq skbs; called when initializing a port */ - static int mvneta_rxq_fill(struct mvneta_port *pp, struct mvneta_rx_queue *rxq, - int num) - { -- int i; -+ int i, err; -+ -+ err = mvneta_create_page_pool(pp, rxq, num); -+ if (err < 0) -+ return err; - - for (i = 0; i < num; i++) { - memset(rxq->descs + i, 0, sizeof(struct mvneta_rx_desc)); |