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Message-ID: <20230215090828.11697-4-alejandro.lucero-palau@amd.com>
Date: Wed, 15 Feb 2023 09:08:23 +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 v8 net-next 3/8] sfc: enumerate mports in ef100
From: Alejandro Lucero <alejandro.lucero-palau@....com>
MAE ports (mports) are the ports on the EF100 embedded switch such
as networking PCIe functions, the physical port, and potentially
others.
Signed-off-by: Alejandro Lucero <alejandro.lucero-palau@....com>
Acked-by: Martin Habets <habetsm.xilinx@...il.com>
---
drivers/net/ethernet/sfc/ef100_nic.c | 27 ++++
drivers/net/ethernet/sfc/ef100_nic.h | 4 +
drivers/net/ethernet/sfc/ef100_rep.c | 22 +++
drivers/net/ethernet/sfc/ef100_rep.h | 2 +
drivers/net/ethernet/sfc/mae.c | 191 ++++++++++++++++++++++++++
drivers/net/ethernet/sfc/mae.h | 36 +++++
drivers/net/ethernet/sfc/mcdi.h | 5 +
drivers/net/ethernet/sfc/net_driver.h | 4 +
8 files changed, 291 insertions(+)
diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c
index ad686c671ab8..07e7dca0e4f2 100644
--- a/drivers/net/ethernet/sfc/ef100_nic.c
+++ b/drivers/net/ethernet/sfc/ef100_nic.c
@@ -747,6 +747,19 @@ static int efx_ef100_get_base_mport(struct efx_nic *efx)
id);
nic_data->base_mport = id;
nic_data->have_mport = true;
+
+ /* Construct mport selector for "calling PF" */
+ efx_mae_mport_uplink(efx, &selector);
+ /* Look up actual mport ID */
+ rc = efx_mae_lookup_mport(efx, selector, &id);
+ if (rc)
+ return rc;
+ if (id >> 16)
+ netif_warn(efx, probe, efx->net_dev, "Bad own m-port id %#x\n",
+ id);
+ nic_data->own_mport = id;
+ nic_data->have_own_mport = true;
+
return 0;
}
#endif
@@ -1126,6 +1139,14 @@ int ef100_probe_netdev_pf(struct efx_nic *efx)
rc);
}
+ rc = efx_init_mae(efx);
+ if (rc)
+ netif_warn(efx, probe, net_dev,
+ "Failed to init MAE rc %d; representors will not function\n",
+ rc);
+ else
+ efx_ef100_init_reps(efx);
+
rc = efx_init_tc(efx);
if (rc) {
/* Either we don't have an MAE at all (i.e. legacy v-switching),
@@ -1157,6 +1178,12 @@ void ef100_remove(struct efx_nic *efx)
{
struct ef100_nic_data *nic_data = efx->nic_data;
+#ifdef CONFIG_SFC_SRIOV
+ if (efx->mae) {
+ efx_ef100_fini_reps(efx);
+ efx_fini_mae(efx);
+ }
+#endif
efx_mcdi_detach(efx);
efx_mcdi_fini(efx);
if (nic_data)
diff --git a/drivers/net/ethernet/sfc/ef100_nic.h b/drivers/net/ethernet/sfc/ef100_nic.h
index 0295933145fa..496aea43c60f 100644
--- a/drivers/net/ethernet/sfc/ef100_nic.h
+++ b/drivers/net/ethernet/sfc/ef100_nic.h
@@ -74,6 +74,10 @@ struct ef100_nic_data {
u64 stats[EF100_STAT_COUNT];
u32 base_mport;
bool have_mport; /* base_mport was populated successfully */
+ u32 own_mport;
+ u32 local_mae_intf; /* interface_idx that corresponds to us, in mport enumerate */
+ bool have_own_mport; /* own_mport was populated successfully */
+ bool have_local_intf; /* local_mae_intf was populated successfully */
bool grp_mae; /* MAE Privilege */
u16 tso_max_hdr_len;
u16 tso_max_payload_num_segs;
diff --git a/drivers/net/ethernet/sfc/ef100_rep.c b/drivers/net/ethernet/sfc/ef100_rep.c
index 81ab22c74635..ebe7b1275713 100644
--- a/drivers/net/ethernet/sfc/ef100_rep.c
+++ b/drivers/net/ethernet/sfc/ef100_rep.c
@@ -9,6 +9,7 @@
* by the Free Software Foundation, incorporated herein by reference.
*/
+#include <linux/rhashtable.h>
#include "ef100_rep.h"
#include "ef100_netdev.h"
#include "ef100_nic.h"
@@ -341,6 +342,27 @@ void efx_ef100_fini_vfreps(struct efx_nic *efx)
efx_ef100_vfrep_destroy(efx, efv);
}
+void efx_ef100_init_reps(struct efx_nic *efx)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+ int rc;
+
+ nic_data->have_local_intf = false;
+ rc = efx_mae_enumerate_mports(efx);
+ if (rc)
+ pci_warn(efx->pci_dev,
+ "Could not enumerate mports (rc=%d), are we admin?",
+ rc);
+}
+
+void efx_ef100_fini_reps(struct efx_nic *efx)
+{
+ struct efx_mae *mae = efx->mae;
+
+ rhashtable_free_and_destroy(&mae->mports_ht, efx_mae_remove_mport,
+ NULL);
+}
+
static int efx_ef100_rep_poll(struct napi_struct *napi, int weight)
{
struct efx_rep *efv = container_of(napi, struct efx_rep, napi);
diff --git a/drivers/net/ethernet/sfc/ef100_rep.h b/drivers/net/ethernet/sfc/ef100_rep.h
index c21bc716f847..328ac0cbb532 100644
--- a/drivers/net/ethernet/sfc/ef100_rep.h
+++ b/drivers/net/ethernet/sfc/ef100_rep.h
@@ -67,4 +67,6 @@ void efx_ef100_rep_rx_packet(struct efx_rep *efv, struct efx_rx_buffer *rx_buf);
*/
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);
#endif /* EF100_REP_H */
diff --git a/drivers/net/ethernet/sfc/mae.c b/drivers/net/ethernet/sfc/mae.c
index 583baf69981c..725a3ab31087 100644
--- a/drivers/net/ethernet/sfc/mae.c
+++ b/drivers/net/ethernet/sfc/mae.c
@@ -9,8 +9,11 @@
* by the Free Software Foundation, incorporated herein by reference.
*/
+#include <linux/rhashtable.h>
+#include "ef100_nic.h"
#include "mae.h"
#include "mcdi.h"
+#include "mcdi_pcol.h"
#include "mcdi_pcol_mae.h"
int efx_mae_allocate_mport(struct efx_nic *efx, u32 *id, u32 *label)
@@ -490,6 +493,163 @@ static bool efx_mae_asl_id(u32 id)
return !!(id & BIT(31));
}
+/* mport handling */
+static const struct rhashtable_params efx_mae_mports_ht_params = {
+ .key_len = sizeof(u32),
+ .key_offset = offsetof(struct mae_mport_desc, mport_id),
+ .head_offset = offsetof(struct mae_mport_desc, linkage),
+};
+
+struct mae_mport_desc *efx_mae_get_mport(struct efx_nic *efx, u32 mport_id)
+{
+ return rhashtable_lookup_fast(&efx->mae->mports_ht, &mport_id,
+ efx_mae_mports_ht_params);
+}
+
+static int efx_mae_add_mport(struct efx_nic *efx, struct mae_mport_desc *desc)
+{
+ struct efx_mae *mae = efx->mae;
+ int rc;
+
+ rc = rhashtable_insert_fast(&mae->mports_ht, &desc->linkage,
+ efx_mae_mports_ht_params);
+
+ if (rc) {
+ pci_err(efx->pci_dev, "Failed to insert MPORT %08x, rc %d\n",
+ desc->mport_id, rc);
+ kfree(desc);
+ return rc;
+ }
+
+ return rc;
+}
+
+void efx_mae_remove_mport(void *desc, void *arg)
+{
+ struct mae_mport_desc *mport = desc;
+
+ synchronize_rcu();
+ kfree(mport);
+}
+
+static int efx_mae_process_mport(struct efx_nic *efx,
+ struct mae_mport_desc *desc)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+ struct mae_mport_desc *mport;
+
+ mport = efx_mae_get_mport(efx, desc->mport_id);
+ if (!IS_ERR_OR_NULL(mport)) {
+ netif_err(efx, drv, efx->net_dev,
+ "mport with id %u does exist!!!\n", desc->mport_id);
+ return -EEXIST;
+ }
+
+ if (nic_data->have_own_mport &&
+ desc->mport_id == nic_data->own_mport) {
+ WARN_ON(desc->mport_type != MAE_MPORT_DESC_MPORT_TYPE_VNIC);
+ WARN_ON(desc->vnic_client_type !=
+ MAE_MPORT_DESC_VNIC_CLIENT_TYPE_FUNCTION);
+ nic_data->local_mae_intf = desc->interface_idx;
+ nic_data->have_local_intf = true;
+ pci_dbg(efx->pci_dev, "MAE interface_idx is %u\n",
+ nic_data->local_mae_intf);
+ }
+
+ return efx_mae_add_mport(efx, desc);
+}
+
+#define MCDI_MPORT_JOURNAL_LEN \
+ ALIGN(MC_CMD_MAE_MPORT_READ_JOURNAL_OUT_LENMAX_MCDI2, 4)
+
+int efx_mae_enumerate_mports(struct efx_nic *efx)
+{
+ efx_dword_t *outbuf = kzalloc(MCDI_MPORT_JOURNAL_LEN, GFP_KERNEL);
+ MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_MPORT_READ_JOURNAL_IN_LEN);
+ MCDI_DECLARE_STRUCT_PTR(desc);
+ size_t outlen, stride, count;
+ int rc = 0, i;
+
+ if (!outbuf)
+ return -ENOMEM;
+ do {
+ rc = efx_mcdi_rpc(efx, MC_CMD_MAE_MPORT_READ_JOURNAL, inbuf,
+ sizeof(inbuf), outbuf,
+ MCDI_MPORT_JOURNAL_LEN, &outlen);
+ if (rc)
+ goto fail;
+ if (outlen < MC_CMD_MAE_MPORT_READ_JOURNAL_OUT_MPORT_DESC_DATA_OFST) {
+ rc = -EIO;
+ goto fail;
+ }
+ count = MCDI_DWORD(outbuf, MAE_MPORT_READ_JOURNAL_OUT_MPORT_DESC_COUNT);
+ if (!count)
+ continue; /* not break; we want to look at MORE flag */
+ stride = MCDI_DWORD(outbuf, MAE_MPORT_READ_JOURNAL_OUT_SIZEOF_MPORT_DESC);
+ if (stride < MAE_MPORT_DESC_LEN) {
+ rc = -EIO;
+ goto fail;
+ }
+ if (outlen < MC_CMD_MAE_MPORT_READ_JOURNAL_OUT_LEN(count * stride)) {
+ rc = -EIO;
+ goto fail;
+ }
+
+ for (i = 0; i < count; i++) {
+ struct mae_mport_desc *d;
+
+ d = kzalloc(sizeof(*d), GFP_KERNEL);
+ if (!d) {
+ rc = -ENOMEM;
+ goto fail;
+ }
+
+ desc = (efx_dword_t *)
+ _MCDI_PTR(outbuf, MC_CMD_MAE_MPORT_READ_JOURNAL_OUT_MPORT_DESC_DATA_OFST +
+ i * stride);
+ d->mport_id = MCDI_STRUCT_DWORD(desc, MAE_MPORT_DESC_MPORT_ID);
+ d->flags = MCDI_STRUCT_DWORD(desc, MAE_MPORT_DESC_FLAGS);
+ d->caller_flags = MCDI_STRUCT_DWORD(desc,
+ MAE_MPORT_DESC_CALLER_FLAGS);
+ d->mport_type = MCDI_STRUCT_DWORD(desc,
+ MAE_MPORT_DESC_MPORT_TYPE);
+ switch (d->mport_type) {
+ case MAE_MPORT_DESC_MPORT_TYPE_NET_PORT:
+ d->port_idx = MCDI_STRUCT_DWORD(desc,
+ MAE_MPORT_DESC_NET_PORT_IDX);
+ break;
+ case MAE_MPORT_DESC_MPORT_TYPE_ALIAS:
+ d->alias_mport_id = MCDI_STRUCT_DWORD(desc,
+ MAE_MPORT_DESC_ALIAS_DELIVER_MPORT_ID);
+ break;
+ case MAE_MPORT_DESC_MPORT_TYPE_VNIC:
+ d->vnic_client_type = MCDI_STRUCT_DWORD(desc,
+ MAE_MPORT_DESC_VNIC_CLIENT_TYPE);
+ d->interface_idx = MCDI_STRUCT_DWORD(desc,
+ MAE_MPORT_DESC_VNIC_FUNCTION_INTERFACE);
+ d->pf_idx = MCDI_STRUCT_WORD(desc,
+ MAE_MPORT_DESC_VNIC_FUNCTION_PF_IDX);
+ d->vf_idx = MCDI_STRUCT_WORD(desc,
+ MAE_MPORT_DESC_VNIC_FUNCTION_VF_IDX);
+ break;
+ default:
+ /* Unknown mport_type, just accept it */
+ break;
+ }
+ rc = efx_mae_process_mport(efx, d);
+ /* Any failure will be due to memory allocation faiure,
+ * so there is no point to try subsequent entries.
+ */
+ if (rc)
+ goto fail;
+ }
+ } while (MCDI_FIELD(outbuf, MAE_MPORT_READ_JOURNAL_OUT, MORE) &&
+ !WARN_ON(!count));
+fail:
+ kfree(outbuf);
+ return rc;
+}
+
int efx_mae_alloc_action_set(struct efx_nic *efx, struct efx_tc_action_set *act)
{
MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_ACTION_SET_ALLOC_OUT_LEN);
@@ -805,3 +965,34 @@ int efx_mae_delete_rule(struct efx_nic *efx, u32 id)
return -EIO;
return 0;
}
+
+int efx_init_mae(struct efx_nic *efx)
+{
+ struct ef100_nic_data *nic_data = efx->nic_data;
+ struct efx_mae *mae;
+ int rc;
+
+ if (!nic_data->have_mport)
+ return -EINVAL;
+
+ mae = kmalloc(sizeof(*mae), GFP_KERNEL);
+ if (!mae)
+ return -ENOMEM;
+
+ rc = rhashtable_init(&mae->mports_ht, &efx_mae_mports_ht_params);
+ if (rc < 0) {
+ kfree(mae);
+ return rc;
+ }
+ efx->mae = mae;
+ mae->efx = efx;
+ return 0;
+}
+
+void efx_fini_mae(struct efx_nic *efx)
+{
+ struct efx_mae *mae = efx->mae;
+
+ kfree(mae);
+ efx->mae = NULL;
+}
diff --git a/drivers/net/ethernet/sfc/mae.h b/drivers/net/ethernet/sfc/mae.h
index 72343e90e222..daa29d2cde96 100644
--- a/drivers/net/ethernet/sfc/mae.h
+++ b/drivers/net/ethernet/sfc/mae.h
@@ -27,6 +27,39 @@ void efx_mae_mport_mport(struct efx_nic *efx, u32 mport_id, u32 *out);
int efx_mae_lookup_mport(struct efx_nic *efx, u32 selector, u32 *id);
+struct mae_mport_desc {
+ u32 mport_id;
+ u32 flags;
+ u32 caller_flags; /* enum mae_mport_desc_caller_flags */
+ u32 mport_type; /* MAE_MPORT_DESC_MPORT_TYPE_* */
+ union {
+ u32 port_idx; /* for mport_type == NET_PORT */
+ u32 alias_mport_id; /* for mport_type == ALIAS */
+ struct { /* for mport_type == VNIC */
+ u32 vnic_client_type; /* MAE_MPORT_DESC_VNIC_CLIENT_TYPE_* */
+ u32 interface_idx;
+ u16 pf_idx;
+ u16 vf_idx;
+ };
+ };
+ struct rhash_head linkage;
+};
+
+int efx_mae_enumerate_mports(struct efx_nic *efx);
+struct mae_mport_desc *efx_mae_get_mport(struct efx_nic *efx, u32 mport_id);
+void efx_mae_put_mport(struct efx_nic *efx, struct mae_mport_desc *desc);
+
+/**
+ * struct efx_mae - MAE information
+ *
+ * @efx: The associated NIC
+ * @mports_ht: m-port descriptions from MC_CMD_MAE_MPORT_READ_JOURNAL
+ */
+struct efx_mae {
+ struct efx_nic *efx;
+ struct rhashtable mports_ht;
+};
+
int efx_mae_start_counters(struct efx_nic *efx, struct efx_rx_queue *rx_queue);
int efx_mae_stop_counters(struct efx_nic *efx, struct efx_rx_queue *rx_queue);
void efx_mae_counters_grant_credits(struct work_struct *work);
@@ -60,4 +93,7 @@ int efx_mae_insert_rule(struct efx_nic *efx, const struct efx_tc_match *match,
u32 prio, u32 acts_id, u32 *id);
int efx_mae_delete_rule(struct efx_nic *efx, u32 id);
+int efx_init_mae(struct efx_nic *efx);
+void efx_fini_mae(struct efx_nic *efx);
+void efx_mae_remove_mport(void *desc, void *arg);
#endif /* EF100_MAE_H */
diff --git a/drivers/net/ethernet/sfc/mcdi.h b/drivers/net/ethernet/sfc/mcdi.h
index 5cb202684858..b139b76febff 100644
--- a/drivers/net/ethernet/sfc/mcdi.h
+++ b/drivers/net/ethernet/sfc/mcdi.h
@@ -229,6 +229,9 @@ void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev);
#define MCDI_WORD(_buf, _field) \
((u16)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 2) + \
le16_to_cpu(*(__force const __le16 *)MCDI_PTR(_buf, _field)))
+#define MCDI_STRUCT_WORD(_buf, _field) \
+ ((void)BUILD_BUG_ON_ZERO(_field ## _LEN != 2), \
+ le16_to_cpu(*(__force const __le16 *)MCDI_STRUCT_PTR(_buf, _field)))
/* Write a 16-bit field defined in the protocol as being big-endian. */
#define MCDI_STRUCT_SET_WORD_BE(_buf, _field, _value) do { \
BUILD_BUG_ON(_field ## _LEN != 2); \
@@ -241,6 +244,8 @@ void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev);
EFX_POPULATE_DWORD_1(*_MCDI_STRUCT_DWORD(_buf, _field), EFX_DWORD_0, _value)
#define MCDI_DWORD(_buf, _field) \
EFX_DWORD_FIELD(*_MCDI_DWORD(_buf, _field), EFX_DWORD_0)
+#define MCDI_STRUCT_DWORD(_buf, _field) \
+ EFX_DWORD_FIELD(*_MCDI_STRUCT_DWORD(_buf, _field), EFX_DWORD_0)
/* Write a 32-bit field defined in the protocol as being big-endian. */
#define MCDI_STRUCT_SET_DWORD_BE(_buf, _field, _value) do { \
BUILD_BUG_ON(_field ## _LEN != 4); \
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index d036641dc043..bc9efbfb3d6b 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -845,6 +845,8 @@ enum efx_xdp_tx_queues_mode {
EFX_XDP_TX_QUEUES_BORROWED /* queues borrowed from net stack */
};
+struct efx_mae;
+
/**
* struct efx_nic - an Efx NIC
* @name: Device name (net device name or bus id before net device registered)
@@ -881,6 +883,7 @@ enum efx_xdp_tx_queues_mode {
* @msi_context: Context for each MSI
* @extra_channel_types: Types of extra (non-traffic) channels that
* should be allocated for this NIC
+ * @mae: Details of the Match Action Engine
* @xdp_tx_queue_count: Number of entries in %xdp_tx_queues.
* @xdp_tx_queues: Array of pointers to tx queues used for XDP transmit.
* @xdp_txq_queues_mode: XDP TX queues sharing strategy.
@@ -1044,6 +1047,7 @@ struct efx_nic {
struct efx_msi_context msi_context[EFX_MAX_CHANNELS];
const struct efx_channel_type *
extra_channel_type[EFX_MAX_EXTRA_CHANNELS];
+ struct efx_mae *mae;
unsigned int xdp_tx_queue_count;
struct efx_tx_queue **xdp_tx_queues;
--
2.17.1
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