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Date: Wed, 20 Jul 2022 19:29:34 +0100
From: <ecree@...inx.com>
To: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
<linux-net-drivers@....com>
CC: <netdev@...r.kernel.org>, Edward Cree <ecree.xilinx@...il.com>
Subject: [PATCH v3 net-next 6/9] sfc: determine representee m-port for EF100 representors
From: Edward Cree <ecree.xilinx@...il.com>
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@...il.com>
---
drivers/net/ethernet/sfc/Makefile | 2 +-
drivers/net/ethernet/sfc/ef100_rep.c | 27 +++++++++++++++++
drivers/net/ethernet/sfc/ef100_rep.h | 2 ++
drivers/net/ethernet/sfc/mae.c | 44 ++++++++++++++++++++++++++++
drivers/net/ethernet/sfc/mae.h | 22 ++++++++++++++
5 files changed, 96 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/ethernet/sfc/mae.c
create mode 100644 drivers/net/ethernet/sfc/mae.h
diff --git a/drivers/net/ethernet/sfc/Makefile b/drivers/net/ethernet/sfc/Makefile
index 7a6772bfde06..4c759488fc77 100644
--- a/drivers/net/ethernet/sfc/Makefile
+++ b/drivers/net/ethernet/sfc/Makefile
@@ -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
diff --git a/drivers/net/ethernet/sfc/ef100_rep.c b/drivers/net/ethernet/sfc/ef100_rep.c
index 0b4f7d536ae6..cf0eac920592 100644
--- a/drivers/net/ethernet/sfc/ef100_rep.c
+++ b/drivers/net/ethernet/sfc/ef100_rep.c
@@ -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 @@ static struct efx_rep *efx_ef100_rep_create_netdev(struct efx_nic *efx,
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,
diff --git a/drivers/net/ethernet/sfc/ef100_rep.h b/drivers/net/ethernet/sfc/ef100_rep.h
index 235565869619..1d17aaf6cd5c 100644
--- a/drivers/net/ethernet/sfc/ef100_rep.h
+++ b/drivers/net/ethernet/sfc/ef100_rep.h
@@ -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;
};
diff --git a/drivers/net/ethernet/sfc/mae.c b/drivers/net/ethernet/sfc/mae.c
new file mode 100644
index 000000000000..011ebd46ada5
--- /dev/null
+++ b/drivers/net/ethernet/sfc/mae.c
@@ -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;
+}
diff --git a/drivers/net/ethernet/sfc/mae.h b/drivers/net/ethernet/sfc/mae.h
new file mode 100644
index 000000000000..27e69e8a54b6
--- /dev/null
+++ b/drivers/net/ethernet/sfc/mae.h
@@ -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 */
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