The DMAC and EMAC blocks of Gigabit Ethernet IP found on RZ/G2L SoC are similar to the R-Car Ethernet AVB IP. The Gigabit Ethernet IP consists of Ethernet controller (E-MAC), Internal TCP/IP Offload Engine (TOE) and Dedicated Direct memory access controller (DMAC). With a few changes in the driver we can support both IPs. This patch series is aims to add functional support for Gigabit Ethernet driver by filling all the stubs except set_features. set_feature patch will send as separate RFC patch along with rx_checksum patch, as it needs further discussion related to HW checksum. With this series, we can do boot kernel with rootFS mounted on NFS on RZ/G2L platforms. Ref:- https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=557655 v2->v3: * Enabled TPE/RPE of TOE, as disabling causes loopback test to fail * Documented CSR0 register bits * Removed PRM setting from EMAC configuration mode * Updated EMAC configuration mode. * Added Sergey's Rb tag V1->V2: * Removed the unrelated comment "GbEthernet TOE Hardware checksum status" and macros TOE_IPV4_RX_CSUM_OK and TOE_IPV6_RX_CSUM_OK which is accidentally introduced as part of RFC discussion from patch #6. RFC->V1: * Removed patch#3 will send it as RFC * Removed rx_csum functionality from patch#7, will send it as RFC * Renamed "nc_queue" -> "nc_queues" * Separated the comment patch into 2 separate patches. * Documented PFRI register bit * Added Sergey's Rb tag RFC changes: * used ALIGN macro for calculating the value for max_rx_len. * used rx_max_buf_size instead of rx_2k_buffers feature bit. * moved struct ravb_rx_desc *gbeth_rx_ring near to ravb_private::rx_ring and allocating it for 1 RX queue. * Started using gbeth_rx_ring instead of gbeth_rx_ring[q]. * renamed ravb_alloc_rx_desc to ravb_alloc_rx_desc_rcar * renamed ravb_rx_ring_free to ravb_rx_ring_free_rcar * renamed ravb_rx_ring_format to ravb_rx_ring_format_rcar * renamed ravb_rcar_rx to ravb_rx_rcar * renamed "tsrq" variable * Updated the comments Biju Das (14): ravb: Use ALIGN macro for max_rx_len ravb: Add rx_max_buf_size to struct ravb_hw_info ravb: Fillup ravb_alloc_rx_desc_gbeth() stub ravb: Fillup ravb_rx_ring_free_gbeth() stub ravb: Fillup ravb_rx_ring_format_gbeth() stub ravb: Fillup ravb_rx_gbeth() stub ravb: Add carrier_counters to struct ravb_hw_info ravb: Add support to retrieve stats for GbEthernet ravb: Rename "tsrq" variable ravb: Optimize ravb_emac_init_gbeth function ravb: Rename "nc_queue" feature bit ravb: Document PFRI register bit ravb: Update ravb_emac_init_gbeth() ravb: Fix typo AVB->DMAC drivers/net/ethernet/renesas/ravb.h | 19 +- drivers/net/ethernet/renesas/ravb_main.c | 328 +++++++++++++++++++---- 2 files changed, 295 insertions(+), 52 deletions(-) -- 2.17.1
