diff options
| author | Hariprasad Kelam <hkelam@marvell.com> | 2021-02-11 18:58:31 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-02-12 01:55:03 +0300 |
| commit | ab58a416c93f134b72ec7e10d8d74509c3985243 (patch) | |
| tree | 9fe4a31880a81861a68f34bde583252b41bdf246 /drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c | |
| parent | 6e54e1c5399a22e30f69771dfd70d5a847c809b4 (diff) | |
| download | linux-ab58a416c93f134b72ec7e10d8d74509c3985243.tar.xz | |
octeontx2-pf: cn10k: Get max mtu supported from admin function
CN10K supports max MTU of 16K on LMAC links and 64k on LBK
links and Octeontx2 silicon supports 9K mtu on both links.
Get the same from nix_get_hw_info mbox message in netdev probe.
This patch also calculates receive buffer size required based
on the MTU set.
Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c | 45 |
1 files changed, 42 insertions, 3 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c index 2779802eed84..cf7875d51d87 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c @@ -230,7 +230,6 @@ int otx2_hw_set_mtu(struct otx2_nic *pfvf, int mtu) return -ENOMEM; } - pfvf->max_frs = mtu + OTX2_ETH_HLEN; req->maxlen = pfvf->max_frs; err = otx2_sync_mbox_msg(&pfvf->mbox); @@ -606,8 +605,8 @@ int otx2_txschq_config(struct otx2_nic *pfvf, int lvl) /* Set topology e.t.c configuration */ if (lvl == NIX_TXSCH_LVL_SMQ) { req->reg[0] = NIX_AF_SMQX_CFG(schq); - req->regval[0] = ((OTX2_MAX_MTU + OTX2_ETH_HLEN) << 8) | - OTX2_MIN_MTU; + req->regval[0] = ((pfvf->netdev->max_mtu + OTX2_ETH_HLEN) << 8) + | OTX2_MIN_MTU; req->regval[0] |= (0x20ULL << 51) | (0x80ULL << 39) | (0x2ULL << 36); @@ -1637,6 +1636,46 @@ void otx2_set_cints_affinity(struct otx2_nic *pfvf) } } +u16 otx2_get_max_mtu(struct otx2_nic *pfvf) +{ + struct nix_hw_info *rsp; + struct msg_req *req; + u16 max_mtu; + int rc; + + mutex_lock(&pfvf->mbox.lock); + + req = otx2_mbox_alloc_msg_nix_get_hw_info(&pfvf->mbox); + if (!req) { + rc = -ENOMEM; + goto out; + } + + rc = otx2_sync_mbox_msg(&pfvf->mbox); + if (!rc) { + rsp = (struct nix_hw_info *) + otx2_mbox_get_rsp(&pfvf->mbox.mbox, 0, &req->hdr); + + /* HW counts VLAN insertion bytes (8 for double tag) + * irrespective of whether SQE is requesting to insert VLAN + * in the packet or not. Hence these 8 bytes have to be + * discounted from max packet size otherwise HW will throw + * SMQ errors + */ + max_mtu = rsp->max_mtu - 8 - OTX2_ETH_HLEN; + } + +out: + mutex_unlock(&pfvf->mbox.lock); + if (rc) { + dev_warn(pfvf->dev, + "Failed to get MTU from hardware setting default value(1500)\n"); + max_mtu = 1500; + } + return max_mtu; +} +EXPORT_SYMBOL(otx2_get_max_mtu); + #define M(_name, _id, _fn_name, _req_type, _rsp_type) \ int __weak \ otx2_mbox_up_handler_ ## _fn_name(struct otx2_nic *pfvf, \ |