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Message-Id: <20190903222821.46161-12-snelson@pensando.io>
Date: Tue, 3 Sep 2019 15:28:13 -0700
From: Shannon Nelson <snelson@...sando.io>
To: snelson@...sando.io, netdev@...r.kernel.org, davem@...emloft.net
Subject: [PATCH v7 net-next 11/19] ionic: Add management of rx filters
Set up the infrastructure for managing Rx filters. We can't ask the
hardware for what filters it has, so we keep a local list of filters
that we've pushed into the HW.
Signed-off-by: Shannon Nelson <snelson@...sando.io>
---
drivers/net/ethernet/pensando/ionic/Makefile | 2 +-
.../net/ethernet/pensando/ionic/ionic_lif.c | 6 +
.../net/ethernet/pensando/ionic/ionic_lif.h | 2 +
.../ethernet/pensando/ionic/ionic_rx_filter.c | 150 ++++++++++++++++++
.../ethernet/pensando/ionic/ionic_rx_filter.h | 35 ++++
5 files changed, 194 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c
create mode 100644 drivers/net/ethernet/pensando/ionic/ionic_rx_filter.h
diff --git a/drivers/net/ethernet/pensando/ionic/Makefile b/drivers/net/ethernet/pensando/ionic/Makefile
index 215ed1ea44df..8c31a90830cf 100644
--- a/drivers/net/ethernet/pensando/ionic/Makefile
+++ b/drivers/net/ethernet/pensando/ionic/Makefile
@@ -4,4 +4,4 @@
obj-$(CONFIG_IONIC) := ionic.o
ionic-y := ionic_main.o ionic_bus_pci.o ionic_devlink.o ionic_dev.o \
- ionic_debugfs.o ionic_lif.o
+ ionic_debugfs.o ionic_lif.o ionic_rx_filter.o
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 9ccb72d45015..2a3f11962bd1 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -830,6 +830,8 @@ static void ionic_lif_deinit(struct ionic_lif *lif)
clear_bit(IONIC_LIF_INITED, lif->state);
+ ionic_rx_filters_deinit(lif);
+
napi_disable(&lif->adminqcq->napi);
ionic_lif_qcq_deinit(lif, lif->notifyqcq);
ionic_lif_qcq_deinit(lif, lif->adminqcq);
@@ -1009,6 +1011,10 @@ static int ionic_lif_init(struct ionic_lif *lif)
if (err)
goto err_out_notifyq_deinit;
+ err = ionic_rx_filters_init(lif);
+ if (err)
+ goto err_out_notifyq_deinit;
+
set_bit(IONIC_LIF_INITED, lif->state);
return 0;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index 1d9a35745bce..53fb4c71a101 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -5,6 +5,7 @@
#define _IONIC_LIF_H_
#include <linux/pci.h>
+#include "ionic_rx_filter.h"
#define IONIC_ADMINQ_LENGTH 16 /* must be a power of two */
#define IONIC_NOTIFYQ_LENGTH 64 /* must be a power of two */
@@ -90,6 +91,7 @@ struct ionic_lif {
dma_addr_t info_pa;
u32 info_sz;
+ struct ionic_rx_filters rx_filters;
unsigned long *dbid_inuse;
unsigned int dbid_count;
struct dentry *dentry;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c
new file mode 100644
index 000000000000..7a093f148ee5
--- /dev/null
+++ b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+
+#include "ionic.h"
+#include "ionic_lif.h"
+#include "ionic_rx_filter.h"
+
+void ionic_rx_filter_free(struct ionic_lif *lif, struct ionic_rx_filter *f)
+{
+ struct device *dev = lif->ionic->dev;
+
+ hlist_del(&f->by_id);
+ hlist_del(&f->by_hash);
+ devm_kfree(dev, f);
+}
+
+int ionic_rx_filter_del(struct ionic_lif *lif, struct ionic_rx_filter *f)
+{
+ struct ionic_admin_ctx ctx = {
+ .work = COMPLETION_INITIALIZER_ONSTACK(ctx.work),
+ .cmd.rx_filter_del = {
+ .opcode = IONIC_CMD_RX_FILTER_DEL,
+ .filter_id = cpu_to_le32(f->filter_id),
+ },
+ };
+
+ return ionic_adminq_post_wait(lif, &ctx);
+}
+
+int ionic_rx_filters_init(struct ionic_lif *lif)
+{
+ unsigned int i;
+
+ spin_lock_init(&lif->rx_filters.lock);
+
+ for (i = 0; i < IONIC_RX_FILTER_HLISTS; i++) {
+ INIT_HLIST_HEAD(&lif->rx_filters.by_hash[i]);
+ INIT_HLIST_HEAD(&lif->rx_filters.by_id[i]);
+ }
+
+ return 0;
+}
+
+void ionic_rx_filters_deinit(struct ionic_lif *lif)
+{
+ struct ionic_rx_filter *f;
+ struct hlist_head *head;
+ struct hlist_node *tmp;
+ unsigned int i;
+
+ for (i = 0; i < IONIC_RX_FILTER_HLISTS; i++) {
+ head = &lif->rx_filters.by_id[i];
+ hlist_for_each_entry_safe(f, tmp, head, by_id)
+ ionic_rx_filter_free(lif, f);
+ }
+}
+
+int ionic_rx_filter_save(struct ionic_lif *lif, u32 flow_id, u16 rxq_index,
+ u32 hash, struct ionic_admin_ctx *ctx)
+{
+ struct device *dev = lif->ionic->dev;
+ struct ionic_rx_filter_add_cmd *ac;
+ struct ionic_rx_filter *f;
+ struct hlist_head *head;
+ unsigned int key;
+
+ ac = &ctx->cmd.rx_filter_add;
+
+ switch (le16_to_cpu(ac->match)) {
+ case IONIC_RX_FILTER_MATCH_VLAN:
+ key = le16_to_cpu(ac->vlan.vlan);
+ break;
+ case IONIC_RX_FILTER_MATCH_MAC:
+ key = *(u32 *)ac->mac.addr;
+ break;
+ case IONIC_RX_FILTER_MATCH_MAC_VLAN:
+ key = le16_to_cpu(ac->mac_vlan.vlan);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ f = devm_kzalloc(dev, sizeof(*f), GFP_KERNEL);
+ if (!f)
+ return -ENOMEM;
+
+ f->flow_id = flow_id;
+ f->filter_id = le32_to_cpu(ctx->comp.rx_filter_add.filter_id);
+ f->rxq_index = rxq_index;
+ memcpy(&f->cmd, ac, sizeof(f->cmd));
+
+ INIT_HLIST_NODE(&f->by_hash);
+ INIT_HLIST_NODE(&f->by_id);
+
+ spin_lock_bh(&lif->rx_filters.lock);
+
+ key = hash_32(key, IONIC_RX_FILTER_HASH_BITS);
+ head = &lif->rx_filters.by_hash[key];
+ hlist_add_head(&f->by_hash, head);
+
+ key = f->filter_id & IONIC_RX_FILTER_HLISTS_MASK;
+ head = &lif->rx_filters.by_id[key];
+ hlist_add_head(&f->by_id, head);
+
+ spin_unlock_bh(&lif->rx_filters.lock);
+
+ return 0;
+}
+
+struct ionic_rx_filter *ionic_rx_filter_by_vlan(struct ionic_lif *lif, u16 vid)
+{
+ struct ionic_rx_filter *f;
+ struct hlist_head *head;
+ unsigned int key;
+
+ key = hash_32(vid, IONIC_RX_FILTER_HASH_BITS);
+ head = &lif->rx_filters.by_hash[key];
+
+ hlist_for_each_entry(f, head, by_hash) {
+ if (le16_to_cpu(f->cmd.match) != IONIC_RX_FILTER_MATCH_VLAN)
+ continue;
+ if (le16_to_cpu(f->cmd.vlan.vlan) == vid)
+ return f;
+ }
+
+ return NULL;
+}
+
+struct ionic_rx_filter *ionic_rx_filter_by_addr(struct ionic_lif *lif,
+ const u8 *addr)
+{
+ struct ionic_rx_filter *f;
+ struct hlist_head *head;
+ unsigned int key;
+
+ key = hash_32(*(u32 *)addr, IONIC_RX_FILTER_HASH_BITS);
+ head = &lif->rx_filters.by_hash[key];
+
+ hlist_for_each_entry(f, head, by_hash) {
+ if (le16_to_cpu(f->cmd.match) != IONIC_RX_FILTER_MATCH_MAC)
+ continue;
+ if (memcmp(addr, f->cmd.mac.addr, ETH_ALEN) == 0)
+ return f;
+ }
+
+ return NULL;
+}
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.h b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.h
new file mode 100644
index 000000000000..b6aec9c19918
--- /dev/null
+++ b/drivers/net/ethernet/pensando/ionic/ionic_rx_filter.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
+
+#ifndef _IONIC_RX_FILTER_H_
+#define _IONIC_RX_FILTER_H_
+
+#define IONIC_RXQ_INDEX_ANY (0xFFFF)
+struct ionic_rx_filter {
+ u32 flow_id;
+ u32 filter_id;
+ u16 rxq_index;
+ struct ionic_rx_filter_add_cmd cmd;
+ struct hlist_node by_hash;
+ struct hlist_node by_id;
+};
+
+#define IONIC_RX_FILTER_HASH_BITS 10
+#define IONIC_RX_FILTER_HLISTS BIT(IONIC_RX_FILTER_HASH_BITS)
+#define IONIC_RX_FILTER_HLISTS_MASK (IONIC_RX_FILTER_HLISTS - 1)
+struct ionic_rx_filters {
+ spinlock_t lock; /* filter list lock */
+ struct hlist_head by_hash[IONIC_RX_FILTER_HLISTS]; /* by skb hash */
+ struct hlist_head by_id[IONIC_RX_FILTER_HLISTS]; /* by filter_id */
+};
+
+void ionic_rx_filter_free(struct ionic_lif *lif, struct ionic_rx_filter *f);
+int ionic_rx_filter_del(struct ionic_lif *lif, struct ionic_rx_filter *f);
+int ionic_rx_filters_init(struct ionic_lif *lif);
+void ionic_rx_filters_deinit(struct ionic_lif *lif);
+int ionic_rx_filter_save(struct ionic_lif *lif, u32 flow_id, u16 rxq_index,
+ u32 hash, struct ionic_admin_ctx *ctx);
+struct ionic_rx_filter *ionic_rx_filter_by_vlan(struct ionic_lif *lif, u16 vid);
+struct ionic_rx_filter *ionic_rx_filter_by_addr(struct ionic_lif *lif, const u8 *addr);
+
+#endif /* _IONIC_RX_FILTER_H_ */
--
2.17.1
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