git.openwrt.org Git - openwrt/staging/thess.git/blob

   1 From c683e378c0907e66cee939145edf936c254ff1e3 Mon Sep 17 00:00:00 2001
   2 From: Lorenzo Bianconi <lorenzo@kernel.org>
   3 Date: Wed, 21 May 2025 09:16:39 +0200
   4 Subject: [PATCH 3/3] net: airoha: Add the capability to allocate hfwd
   5  descriptors in SRAM
   6
   7 In order to improve packet processing and packet forwarding
   8 performances, EN7581 SoC supports consuming SRAM instead of DRAM for
   9 hw forwarding descriptors queue.
  10 For downlink hw accelerated traffic request to consume SRAM memory
  11 for hw forwarding descriptors queue.
  12
  13 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  14 Reviewed-by: Simon Horman <horms@kernel.org>
  15 Link: https://patch.msgid.link/20250521-airopha-desc-sram-v3-4-a6e9b085b4f0@kernel.org
  16 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
  17 ---
  18  drivers/net/ethernet/airoha/airoha_eth.c | 11 +----------
  19  drivers/net/ethernet/airoha/airoha_eth.h |  9 +++++++++
  20  drivers/net/ethernet/airoha/airoha_ppe.c |  6 ++++++
  21  3 files changed, 16 insertions(+), 10 deletions(-)
  22
  23 --- a/drivers/net/ethernet/airoha/airoha_eth.c
  24 +++ b/drivers/net/ethernet/airoha/airoha_eth.c
  25 @@ -71,15 +71,6 @@ static void airoha_qdma_irq_disable(stru
  26         airoha_qdma_set_irqmask(irq_bank, index, mask, 0);
  27  }
  28
  29 -static bool airhoa_is_lan_gdm_port(struct airoha_gdm_port *port)
  30 -{
  31 -       /* GDM1 port on EN7581 SoC is connected to the lan dsa switch.
  32 -        * GDM{2,3,4} can be used as wan port connected to an external
  33 -        * phy module.
  34 -        */
  35 -       return port->id == 1;
  36 -}
  37 -
  38  static void airoha_set_macaddr(struct airoha_gdm_port *port, const u8 *addr)
  39  {
  40         struct airoha_eth *eth = port->qdma->eth;
  41 @@ -1125,7 +1116,7 @@ static int airoha_qdma_init_hfwd_queues(
  42                         LMGR_INIT_START | LMGR_SRAM_MODE_MASK |
  43                         HW_FWD_DESC_NUM_MASK,
  44                         FIELD_PREP(HW_FWD_DESC_NUM_MASK, HW_DSCP_NUM) |
  45 -                       LMGR_INIT_START);
  46 +                       LMGR_INIT_START | LMGR_SRAM_MODE_MASK);
  47
  48         return read_poll_timeout(airoha_qdma_rr, status,
  49                                  !(status & LMGR_INIT_START), USEC_PER_MSEC,
  50 --- a/drivers/net/ethernet/airoha/airoha_eth.h
  51 +++ b/drivers/net/ethernet/airoha/airoha_eth.h
  52 @@ -597,6 +597,15 @@ u32 airoha_rmw(void __iomem *base, u32 o
  53  #define airoha_qdma_clear(qdma, offset, val)                   \
  54         airoha_rmw((qdma)->regs, (offset), (val), 0)
  55
  56 +static inline bool airhoa_is_lan_gdm_port(struct airoha_gdm_port *port)
  57 +{
  58 +       /* GDM1 port on EN7581 SoC is connected to the lan dsa switch.
  59 +        * GDM{2,3,4} can be used as wan port connected to an external
  60 +        * phy module.
  61 +        */
  62 +       return port->id == 1;
  63 +}
  64 +
  65  bool airoha_is_valid_gdm_port(struct airoha_eth *eth,
  66                               struct airoha_gdm_port *port);
  67
  68 --- a/drivers/net/ethernet/airoha/airoha_ppe.c
  69 +++ b/drivers/net/ethernet/airoha/airoha_ppe.c
  70 @@ -251,6 +251,12 @@ static int airoha_ppe_foe_entry_prepare(
  71                 else
  72                         pse_port = 2; /* uplink relies on GDM2 loopback */
  73                 val |= FIELD_PREP(AIROHA_FOE_IB2_PSE_PORT, pse_port);
  74 +
  75 +               /* For downlink traffic consume SRAM memory for hw forwarding
  76 +                * descriptors queue.
  77 +                */
  78 +               if (airhoa_is_lan_gdm_port(port))
  79 +                       val |= AIROHA_FOE_IB2_FAST_PATH;
  80         }
  81
  82         if (is_multicast_ether_addr(data->eth.h_dest))