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sfc: determine representee m-port for EF100 representors

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An MAE port, or m-port, is a port (source/destination for traffic) on
 the Match-Action Engine (the internal switch on EF100).
Representors will use their representee's m-port for two purposes: as
 a destination override on TX from the representor, and as a source
 match in 'default rules' to steer representee traffic (when not
 matched by e.g. a TC flower rule) to representor RX via the parent
 PF's receive queue.

Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree 2022-07-20 19:29:34 +01:00 • committed by David S. Miller
parent e1479556f8
commit da56552d04
5 changed files with 96 additions and 1 deletions
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2
drivers/net/ethernet/sfc/Makefile
View file

@ -8,7 +8,7 @@ sfc-y += efx.o efx_common.o efx_channels.o nic.o \
ef100.o ef100_nic.o ef100_netdev.o \
ef100_ethtool.o ef100_rx.o ef100_tx.o
sfc-$(CONFIG_SFC_MTD) += mtd.o
sfc-$(CONFIG_SFC_SRIOV) += sriov.o ef10_sriov.o ef100_sriov.o ef100_rep.o
sfc-$(CONFIG_SFC_SRIOV) += sriov.o ef10_sriov.o ef100_sriov.o ef100_rep.o mae.o
obj-$(CONFIG_SFC) += sfc.o

27
drivers/net/ethernet/sfc/ef100_rep.c
View file

@ -11,6 +11,7 @@
#include "ef100_rep.h"
#include "ef100_nic.h"
#include "mae.h"
#define EFX_EF100_REP_DRIVER "efx_ef100_rep"
@ -124,6 +125,25 @@ fail1:
return ERR_PTR(rc);
}
static int efx_ef100_configure_rep(struct efx_rep *efv)
{
struct efx_nic *efx = efv->parent;
u32 selector;
int rc;
/* Construct mport selector for corresponding VF */
efx_mae_mport_vf(efx, efv->idx, &selector);
/* Look up actual mport ID */
rc = efx_mae_lookup_mport(efx, selector, &efv->mport);
if (rc)
return rc;
pci_dbg(efx->pci_dev, "VF %u has mport ID %#x\n", efv->idx, efv->mport);
/* mport label should fit in 16 bits */
WARN_ON(efv->mport >> 16);
return 0;
}
static void efx_ef100_rep_destroy_netdev(struct efx_rep *efv)
{
struct efx_nic *efx = efv->parent;
@ -147,6 +167,13 @@ int efx_ef100_vfrep_create(struct efx_nic *efx, unsigned int i)
rc);
return rc;
}
rc = efx_ef100_configure_rep(efv);
if (rc) {
pci_err(efx->pci_dev,
"Failed to configure representor for VF %d, rc %d\n",
i, rc);
goto fail;
}
rc = register_netdev(efv->net_dev);
if (rc) {
pci_err(efx->pci_dev,

2
drivers/net/ethernet/sfc/ef100_rep.h
View file

@ -21,6 +21,7 @@
* @parent: the efx PF which manages this representor
* @net_dev: representor netdevice
* @msg_enable: log message enable flags
* @mport: m-port ID of corresponding VF
* @idx: VF index
* @list: entry on efx->vf_reps
*/
@ -28,6 +29,7 @@ struct efx_rep {
struct efx_nic *parent;
struct net_device *net_dev;
u32 msg_enable;
u32 mport;
unsigned int idx;
struct list_head list;
};

44
drivers/net/ethernet/sfc/mae.c Normal file
View file

@ -0,0 +1,44 @@
// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2019 Solarflare Communications Inc.
* Copyright 2020-2022 Xilinx Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#include "mae.h"
#include "mcdi.h"
#include "mcdi_pcol.h"
void efx_mae_mport_vf(struct efx_nic *efx __always_unused, u32 vf_id, u32 *out)
{
efx_dword_t mport;
EFX_POPULATE_DWORD_3(mport,
MAE_MPORT_SELECTOR_TYPE, MAE_MPORT_SELECTOR_TYPE_FUNC,
MAE_MPORT_SELECTOR_FUNC_PF_ID, MAE_MPORT_SELECTOR_FUNC_PF_ID_CALLER,
MAE_MPORT_SELECTOR_FUNC_VF_ID, vf_id);
*out = EFX_DWORD_VAL(mport);
}
/* id is really only 24 bits wide */
int efx_mae_lookup_mport(struct efx_nic *efx, u32 selector, u32 *id)
{
MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_MPORT_LOOKUP_OUT_LEN);
MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_MPORT_LOOKUP_IN_LEN);
size_t outlen;
int rc;
MCDI_SET_DWORD(inbuf, MAE_MPORT_LOOKUP_IN_MPORT_SELECTOR, selector);
rc = efx_mcdi_rpc(efx, MC_CMD_MAE_MPORT_LOOKUP, inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf), &outlen);
if (rc)
return rc;
if (outlen < sizeof(outbuf))
return -EIO;
*id = MCDI_DWORD(outbuf, MAE_MPORT_LOOKUP_OUT_MPORT_ID);
return 0;
}

22
drivers/net/ethernet/sfc/mae.h Normal file
View file

@ -0,0 +1,22 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2019 Solarflare Communications Inc.
* Copyright 2020-2022 Xilinx Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#ifndef EF100_MAE_H
#define EF100_MAE_H
/* MCDI interface for the ef100 Match-Action Engine */
#include "net_driver.h"
void efx_mae_mport_vf(struct efx_nic *efx, u32 vf_id, u32 *out);
int efx_mae_lookup_mport(struct efx_nic *efx, u32 selector, u32 *id);
#endif /* EF100_MAE_H */