[net-next,v2,00/14] Add functional support for Gigabit Ethernet driver

Message

Biju Das Oct. 10, 2021, 7:29 a.m. UTC

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

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 EMAC configuration mode comment
  ravb: Fix typo AVB->DMAC

 drivers/net/ethernet/renesas/ravb.h      |  13 +-
 drivers/net/ethernet/renesas/ravb_main.c | 325 +++++++++++++++++++----
 2 files changed, 287 insertions(+), 51 deletions(-)