ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
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
new file mode 100644
index 0000000..fbcae20
--- /dev/null
+++ b/target/linux/mvebu/patches-5.4/004-net-mvneta-introduce-page-pool-API-for-sw-buffer-man.patch
@@ -0,0 +1,181 @@
+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));