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net: airoha: ppe: Configure SRAM PPE entries via the cpu 

Introduce airoha_ppe_foe_commit_sram_entry routine in order to configure
the SRAM PPE entries directly via the CPU instead of using the NPU APIs.
This is a preliminary patch to enable netfilter flowtable hw offload for
AN7583 SoC.

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20251017-an7583-eth-support-v3-8-f28319666667@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
pull/1354/merge
Lorenzo Bianconi 2025-10-17 11:06:17 +02:00 committed by Paolo Abeni
parent 41139125f5
commit 306b78f503
1 changed files with 23 additions and 7 deletions
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30
drivers/net/ethernet/airoha/airoha_ppe.c
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@ -656,6 +656,27 @@ static bool airoha_ppe_foe_compare_entry(struct airoha_flow_table_entry *e,
return !memcmp(&e->data.d, &hwe->d, len - sizeof(hwe->ib1));
}
static int airoha_ppe_foe_commit_sram_entry(struct airoha_ppe *ppe, u32 hash)
{
struct airoha_foe_entry *hwe = ppe->foe + hash * sizeof(*hwe);
bool ppe2 = hash >= PPE_SRAM_NUM_ENTRIES;
u32 *ptr = (u32 *)hwe, val;
int i;
for (i = 0; i < sizeof(*hwe) / sizeof(*ptr); i++)
airoha_fe_wr(ppe->eth, REG_PPE_RAM_ENTRY(ppe2, i), ptr[i]);
wmb();
airoha_fe_wr(ppe->eth, REG_PPE_RAM_CTRL(ppe2),
FIELD_PREP(PPE_SRAM_CTRL_ENTRY_MASK, hash) |
PPE_SRAM_CTRL_WR_MASK | PPE_SRAM_CTRL_REQ_MASK);
return read_poll_timeout_atomic(airoha_fe_rr, val,
val & PPE_SRAM_CTRL_ACK_MASK,
10, 100, false, ppe->eth,
REG_PPE_RAM_CTRL(ppe2));
}
static int airoha_ppe_foe_commit_entry(struct airoha_ppe *ppe,
struct airoha_foe_entry *e,
u32 hash, bool rx_wlan)
@ -685,13 +706,8 @@ static int airoha_ppe_foe_commit_entry(struct airoha_ppe *ppe,
if (!rx_wlan)
airoha_ppe_foe_flow_stats_update(ppe, npu, hwe, hash);
if (hash < sram_num_entries) {
dma_addr_t addr = ppe->foe_dma + hash * sizeof(*hwe);
bool ppe2 = hash >= PPE_SRAM_NUM_ENTRIES;
err = npu->ops.ppe_foe_commit_entry(npu, addr, sizeof(*hwe),
hash, ppe2);
}
if (hash < sram_num_entries)
err = airoha_ppe_foe_commit_sram_entry(ppe, hash);
unlock:
rcu_read_unlock();