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Message-ID: <20230131145822.36208-6-alejandro.lucero-palau@amd.com>
Date: Tue, 31 Jan 2023 14:58:19 +0000
From: <alejandro.lucero-palau@....com>
To: <netdev@...r.kernel.org>, <linux-net-drivers@....com>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
<edumazet@...gle.com>, <habetsm.xilinx@...il.com>,
<ecree.xilinx@...il.com>, <linux-doc@...r.kernel.org>,
<corbet@....net>, <jiri@...dia.com>,
"Alejandro Lucero" <alejandro.lucero-palau@....com>
Subject: [PATCH v4 net-next 5/8] sfc: add devlink port support for ef100
From: Alejandro Lucero <alejandro.lucero-palau@....com>
Using the data when enumerating mports, create devlink ports just before
netdevs are registered and remove those devlink ports after netdev has
been unregistered.
Signed-off-by: Alejandro Lucero <alejandro.lucero-palau@....com>
---
drivers/net/ethernet/sfc/ef100_netdev.c | 9 +++
drivers/net/ethernet/sfc/ef100_rep.c | 22 ++++++
drivers/net/ethernet/sfc/ef100_rep.h | 7 ++
drivers/net/ethernet/sfc/efx_devlink.c | 97 +++++++++++++++++++++++++
drivers/net/ethernet/sfc/efx_devlink.h | 6 ++
drivers/net/ethernet/sfc/mae.h | 2 +
drivers/net/ethernet/sfc/net_driver.h | 2 +
7 files changed, 145 insertions(+)
diff --git a/drivers/net/ethernet/sfc/ef100_netdev.c b/drivers/net/ethernet/sfc/ef100_netdev.c
index b10a226f4a07..36774b55d413 100644
--- a/drivers/net/ethernet/sfc/ef100_netdev.c
+++ b/drivers/net/ethernet/sfc/ef100_netdev.c
@@ -335,7 +335,9 @@ void ef100_remove_netdev(struct efx_probe_data *probe_data)
/* devlink lock */
efx_fini_devlink_start(efx);
+
ef100_unregister_netdev(efx);
+ ef100_pf_unset_devlink_port(efx);
#ifdef CONFIG_SFC_SRIOV
efx_fini_tc(efx);
@@ -423,6 +425,8 @@ int ef100_probe_netdev(struct efx_probe_data *probe_data)
rc = ef100_probe_netdev_pf(efx);
if (rc)
goto fail;
+
+ ef100_pf_set_devlink_port(efx);
}
efx->netdev_notifier.notifier_call = ef100_netdev_event;
@@ -433,7 +437,12 @@ int ef100_probe_netdev(struct efx_probe_data *probe_data)
goto fail;
}
+ /* devlink unlock */
+ efx_probe_devlink_done(efx);
+ return rc;
fail:
+ /* remove devlink port if does exist */
+ ef100_pf_unset_devlink_port(efx);
/* devlink unlock */
efx_probe_devlink_done(efx);
return rc;
diff --git a/drivers/net/ethernet/sfc/ef100_rep.c b/drivers/net/ethernet/sfc/ef100_rep.c
index 9cd1a3ac67e0..6b5bc5d6955d 100644
--- a/drivers/net/ethernet/sfc/ef100_rep.c
+++ b/drivers/net/ethernet/sfc/ef100_rep.c
@@ -16,6 +16,7 @@
#include "mae.h"
#include "rx_common.h"
#include "tc_bindings.h"
+#include "efx_devlink.h"
#define EFX_EF100_REP_DRIVER "efx_ef100_rep"
@@ -297,6 +298,7 @@ int efx_ef100_vfrep_create(struct efx_nic *efx, unsigned int i)
i, rc);
goto fail1;
}
+ ef100_rep_set_devlink_port(efv);
rc = register_netdev(efv->net_dev);
if (rc) {
pci_err(efx->pci_dev,
@@ -308,6 +310,7 @@ int efx_ef100_vfrep_create(struct efx_nic *efx, unsigned int i)
efv->net_dev->name);
return 0;
fail2:
+ ef100_rep_unset_devlink_port(efv);
efx_ef100_deconfigure_rep(efv);
fail1:
efx_ef100_rep_destroy_netdev(efv);
@@ -323,6 +326,7 @@ void efx_ef100_vfrep_destroy(struct efx_nic *efx, struct efx_rep *efv)
return;
netif_dbg(efx, drv, rep_dev, "Removing VF representor\n");
unregister_netdev(rep_dev);
+ ef100_rep_unset_devlink_port(efv);
efx_ef100_deconfigure_rep(efv);
efx_ef100_rep_destroy_netdev(efv);
}
@@ -339,6 +343,24 @@ void efx_ef100_fini_vfreps(struct efx_nic *efx)
efx_ef100_vfrep_destroy(efx, efv);
}
+static bool ef100_mport_is_pcie_vnic(struct mae_mport_desc *mport_desc)
+{
+ return mport_desc->mport_type == MAE_MPORT_DESC_MPORT_TYPE_VNIC &&
+ mport_desc->vnic_client_type == MAE_MPORT_DESC_VNIC_CLIENT_TYPE_FUNCTION;
+}
+
+bool ef100_mport_on_local_intf(struct efx_nic *efx,
+ struct mae_mport_desc *mport_desc)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+ bool pcie_func;
+
+ pcie_func = ef100_mport_is_pcie_vnic(mport_desc);
+
+ return nic_data->have_local_intf && pcie_func &&
+ mport_desc->interface_idx == nic_data->local_mae_intf;
+}
+
void efx_ef100_init_reps(struct efx_nic *efx)
{
struct ef100_nic_data *nic_data = efx->nic_data;
diff --git a/drivers/net/ethernet/sfc/ef100_rep.h b/drivers/net/ethernet/sfc/ef100_rep.h
index 328ac0cbb532..ae6add4b0855 100644
--- a/drivers/net/ethernet/sfc/ef100_rep.h
+++ b/drivers/net/ethernet/sfc/ef100_rep.h
@@ -22,6 +22,8 @@ struct efx_rep_sw_stats {
atomic64_t rx_dropped, tx_errors;
};
+struct devlink_port;
+
/**
* struct efx_rep - Private data for an Efx representor
*
@@ -39,6 +41,7 @@ struct efx_rep_sw_stats {
* @rx_lock: protects @rx_list
* @napi: NAPI control structure
* @stats: software traffic counters for netdev stats
+ * @dl_port: devlink port associated to this netdev representor
*/
struct efx_rep {
struct efx_nic *parent;
@@ -54,6 +57,7 @@ struct efx_rep {
spinlock_t rx_lock;
struct napi_struct napi;
struct efx_rep_sw_stats stats;
+ struct devlink_port *dl_port;
};
int efx_ef100_vfrep_create(struct efx_nic *efx, unsigned int i);
@@ -69,4 +73,7 @@ struct efx_rep *efx_ef100_find_rep_by_mport(struct efx_nic *efx, u16 mport);
extern const struct net_device_ops efx_ef100_rep_netdev_ops;
void efx_ef100_init_reps(struct efx_nic *efx);
void efx_ef100_fini_reps(struct efx_nic *efx);
+struct mae_mport_desc;
+bool ef100_mport_on_local_intf(struct efx_nic *efx,
+ struct mae_mport_desc *mport_desc);
#endif /* EF100_REP_H */
diff --git a/drivers/net/ethernet/sfc/efx_devlink.c b/drivers/net/ethernet/sfc/efx_devlink.c
index ff5adfe3905e..b1637eb372ad 100644
--- a/drivers/net/ethernet/sfc/efx_devlink.c
+++ b/drivers/net/ethernet/sfc/efx_devlink.c
@@ -16,11 +16,48 @@
#include "mcdi.h"
#include "mcdi_functions.h"
#include "mcdi_pcol.h"
+#include "mae.h"
+#include "ef100_rep.h"
struct efx_devlink {
struct efx_nic *efx;
};
+static void efx_devlink_del_port(struct devlink_port *dl_port)
+{
+ if (!dl_port)
+ return;
+ devl_port_unregister(dl_port);
+}
+
+static int efx_devlink_add_port(struct efx_nic *efx,
+ struct mae_mport_desc *mport)
+{
+ bool external = false;
+
+ if (!ef100_mport_on_local_intf(efx, mport))
+ external = true;
+
+ switch (mport->mport_type) {
+ case MAE_MPORT_DESC_MPORT_TYPE_VNIC:
+ if (mport->vf_idx != MAE_MPORT_DESC_VF_IDX_NULL)
+ devlink_port_attrs_pci_vf_set(&mport->dl_port, 0, mport->pf_idx,
+ mport->vf_idx,
+ external);
+ else
+ devlink_port_attrs_pci_pf_set(&mport->dl_port, 0, mport->pf_idx,
+ external);
+ break;
+ default:
+ /* MAE_MPORT_DESC_MPORT_ALIAS and UNDEFINED */
+ return 0;
+ }
+
+ mport->dl_port.index = mport->mport_id;
+
+ return devl_port_register(efx->devlink, &mport->dl_port, mport->mport_id);
+}
+
static int efx_devlink_info_nvram_partition(struct efx_nic *efx,
struct devlink_info_req *req,
unsigned int partition_type,
@@ -428,6 +465,66 @@ static const struct devlink_ops sfc_devlink_ops = {
.info_get = efx_devlink_info_get,
};
+static struct devlink_port *ef100_set_devlink_port(struct efx_nic *efx, u32 idx)
+{
+ struct mae_mport_desc *mport;
+ u32 id;
+
+ if (efx_mae_lookup_mport(efx, idx, &id)) {
+ /* This should not happen. */
+ if (idx == MAE_MPORT_DESC_VF_IDX_NULL)
+ pci_warn(efx->pci_dev, "No mport ID found for PF.\n");
+ else
+ pci_warn(efx->pci_dev, "No mport ID found for VF %u.\n",
+ idx);
+ return NULL;
+ }
+
+ mport = efx_mae_get_mport(efx, id);
+ if (!mport) {
+ /* This should not happen. */
+ if (idx == MAE_MPORT_DESC_VF_IDX_NULL)
+ pci_warn(efx->pci_dev, "No mport found for PF.\n");
+ else
+ pci_warn(efx->pci_dev, "No mport found for VF %u.\n",
+ idx);
+ return NULL;
+ }
+
+ if (efx_devlink_add_port(efx, mport)) {
+ if (idx == MAE_MPORT_DESC_VF_IDX_NULL)
+ pci_warn(efx->pci_dev,
+ "devlink port creation for PF failed.\n");
+ else
+ pci_warn(efx->pci_dev,
+ "devlink_port creationg for VF %u failed.\n",
+ idx);
+ return NULL;
+ }
+
+ return &mport->dl_port;
+}
+
+void ef100_rep_set_devlink_port(struct efx_rep *efv)
+{
+ efv->dl_port = ef100_set_devlink_port(efv->parent, efv->idx);
+}
+
+void ef100_pf_set_devlink_port(struct efx_nic *efx)
+{
+ efx->dl_port = ef100_set_devlink_port(efx, MAE_MPORT_DESC_VF_IDX_NULL);
+}
+
+void ef100_rep_unset_devlink_port(struct efx_rep *efv)
+{
+ efx_devlink_del_port(efv->dl_port);
+}
+
+void ef100_pf_unset_devlink_port(struct efx_nic *efx)
+{
+ efx_devlink_del_port(efx->dl_port);
+}
+
void efx_fini_devlink_start(struct efx_nic *efx)
{
if (efx->devlink)
diff --git a/drivers/net/ethernet/sfc/efx_devlink.h b/drivers/net/ethernet/sfc/efx_devlink.h
index 8bcd077d8d8d..d453a180c44c 100644
--- a/drivers/net/ethernet/sfc/efx_devlink.h
+++ b/drivers/net/ethernet/sfc/efx_devlink.h
@@ -36,4 +36,10 @@ void efx_probe_devlink_done(struct efx_nic *efx);
void efx_fini_devlink_start(struct efx_nic *efx);
void efx_fini_devlink(struct efx_nic *efx);
+struct efx_rep;
+
+void ef100_pf_set_devlink_port(struct efx_nic *efx);
+void ef100_rep_set_devlink_port(struct efx_rep *efv);
+void ef100_pf_unset_devlink_port(struct efx_nic *efx);
+void ef100_rep_unset_devlink_port(struct efx_rep *efv);
#endif /* _EFX_DEVLINK_H */
diff --git a/drivers/net/ethernet/sfc/mae.h b/drivers/net/ethernet/sfc/mae.h
index d9adeafc0654..e1b7967132ad 100644
--- a/drivers/net/ethernet/sfc/mae.h
+++ b/drivers/net/ethernet/sfc/mae.h
@@ -13,6 +13,7 @@
#define EF100_MAE_H
/* MCDI interface for the ef100 Match-Action Engine */
+#include <net/devlink.h>
#include "net_driver.h"
#include "tc.h"
#include "mcdi_pcol.h" /* needed for various MC_CMD_MAE_*_NULL defines */
@@ -44,6 +45,7 @@ struct mae_mport_desc {
};
struct rhash_head linkage;
struct efx_rep *efv;
+ struct devlink_port dl_port;
};
int efx_mae_enumerate_mports(struct efx_nic *efx);
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index bc9efbfb3d6b..fcd51d3992fa 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -998,6 +998,7 @@ struct efx_mae;
* @netdev_notifier: Netdevice notifier.
* @tc: state for TC offload (EF100).
* @devlink: reference to devlink structure owned by this device
+ * @dl_port: devlink port associated with the PF
* @mem_bar: The BAR that is mapped into membase.
* @reg_base: Offset from the start of the bar to the function control window.
* @monitor_work: Hardware monitor workitem
@@ -1185,6 +1186,7 @@ struct efx_nic {
struct efx_tc_state *tc;
struct devlink *devlink;
+ struct devlink_port *dl_port;
unsigned int mem_bar;
u32 reg_base;
--
2.17.1
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