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octeontx2-pf: Fix NIX_AF_TL3_TL2X_LINKX_CFG register configuration

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For packets scheduled to RPM and LBK, NIX_AF_PSE_CHANNEL_LEVEL[BP_LEVEL]
selects the TL3 or TL2 scheduling level as the one used for link/channel
selection and backpressure. For each scheduling queue at the selected
level: Setting NIX_AF_TL3_TL2(0..255)_LINK(0..12)_CFG[ENA] = 1 allows
the TL3/TL2 queue to schedule packets to a specified RPM or LBK link
and channel.

There is an issue in the code where NIX_AF_PSE_CHANNEL_LEVEL[BP_LEVEL]
is set to TL3 where as the NIX_AF_TL3_TL2(0..255)_LINK(0..12)_CFG is
configured for TL2 queue in some cases. As a result packets will not
transmit on that link/channel. This patch fixes the issue by configuring
the NIX_AF_TL3_TL2(0..255)_LINK(0..12)_CFG register depending on the
NIX_AF_PSE_CHANNEL_LEVEL[BP_LEVEL] value.

Fixes: caa2da34fd ("octeontx2-pf: Initialize and config queues")
Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Link: https://lore.kernel.org/r/20220802142813.25031-1-naveenm@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Naveen Mamindlapalli 2022-08-02 19:58:13 +05:30 • committed by Jakub Kicinski
parent 63e36289c4
commit 13c9f4dc10
2 changed files with 15 additions and 5 deletions
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19
drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
View file

@ -632,6 +632,12 @@ int otx2_txschq_config(struct otx2_nic *pfvf, int lvl)
req->num_regs++;
req->reg[1] = NIX_AF_TL3X_SCHEDULE(schq);
req->regval[1] = dwrr_val;
if (lvl == hw->txschq_link_cfg_lvl) {
req->num_regs++;
req->reg[2] = NIX_AF_TL3_TL2X_LINKX_CFG(schq, hw->tx_link);
/* Enable this queue and backpressure */
req->regval[2] = BIT_ULL(13) | BIT_ULL(12);
}
} else if (lvl == NIX_TXSCH_LVL_TL2) {
parent = hw->txschq_list[NIX_TXSCH_LVL_TL1][0];
req->reg[0] = NIX_AF_TL2X_PARENT(schq);
@ -641,11 +647,12 @@ int otx2_txschq_config(struct otx2_nic *pfvf, int lvl)
req->reg[1] = NIX_AF_TL2X_SCHEDULE(schq);
req->regval[1] = TXSCH_TL1_DFLT_RR_PRIO << 24 | dwrr_val;
req->num_regs++;
req->reg[2] = NIX_AF_TL3_TL2X_LINKX_CFG(schq, hw->tx_link);
/* Enable this queue and backpressure */
req->regval[2] = BIT_ULL(13) | BIT_ULL(12);
if (lvl == hw->txschq_link_cfg_lvl) {
req->num_regs++;
req->reg[2] = NIX_AF_TL3_TL2X_LINKX_CFG(schq, hw->tx_link);
/* Enable this queue and backpressure */
req->regval[2] = BIT_ULL(13) | BIT_ULL(12);
}
} else if (lvl == NIX_TXSCH_LVL_TL1) {
/* Default config for TL1.
* For VF this is always ignored.
@ -1591,6 +1598,8 @@ void mbox_handler_nix_txsch_alloc(struct otx2_nic *pf,
for (schq = 0; schq < rsp->schq[lvl]; schq++)
pf->hw.txschq_list[lvl][schq] =
rsp->schq_list[lvl][schq];
pf->hw.txschq_link_cfg_lvl = rsp->link_cfg_lvl;
}
EXPORT_SYMBOL(mbox_handler_nix_txsch_alloc);

1
drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
View file

@ -195,6 +195,7 @@ struct otx2_hw {
u16 sqb_size;
/* NIX */
u8 txschq_link_cfg_lvl;
u16 txschq_list[NIX_TXSCH_LVL_CNT][MAX_TXSCHQ_PER_FUNC];
u16 matchall_ipolicer;
u32 dwrr_mtu;