* [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading
@ 2022-02-16 1:05 Yevhen Orlov
2022-02-16 1:05 ` [PATCH net-next 1/3] net: marvell: prestera: Add router LPM ABI Yevhen Orlov
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: Yevhen Orlov @ 2022-02-16 1:05 UTC (permalink / raw)
To: netdev
Cc: Volodymyr Mytnyk, Taras Chornyi, Mickey Rachamim, Serhiy Pshyk,
Yevhen Orlov, Taras Chornyi, Oleksandr Mazur, David S. Miller,
Jakub Kicinski, linux-kernel
Add support for blackhole and local routes for Marvell Prestera driver.
Subscribe on fib notifications and handle add/del.
Add features:
- Support route adding.
e.g.: "ip route add blackhole 7.7.1.1/24"
e.g.: "ip route add local 9.9.9.9 dev sw1p30"
- Support "rt_trap", "rt_offload", "rt_offload_failed" flags
- Handle case, when route in "local" table overlaps route in "main" table
example:
ip ro add blackhole 7.7.7.7
ip ro add local 7.7.7.7 dev sw1p30
# blackhole route will be deoffloaded. rt_offload flag disappeared
Limitations:
- Only "blackhole" and "local" routes supported. "nexthop" routes is TRAP
for now and will be implemented soon.
- Only "local" and "main" tables supported
Co-developed-by: Taras Chornyi <tchornyi@marvell.com>
Signed-off-by: Taras Chornyi <tchornyi@marvell.com>
Co-developed-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Yevhen Orlov <yevhen.orlov@plvision.eu>
Yevhen Orlov (3):
net: marvell: prestera: Add router LPM ABI
net: marvell: prestera: add hardware router objects accounting for lpm
net: marvell: prestera: handle fib notifications
.../net/ethernet/marvell/prestera/prestera.h | 5 +
.../ethernet/marvell/prestera/prestera_hw.c | 49 +++
.../ethernet/marvell/prestera/prestera_hw.h | 6 +
.../ethernet/marvell/prestera/prestera_main.c | 11 +
.../marvell/prestera/prestera_router.c | 412 ++++++++++++++++++
.../marvell/prestera/prestera_router_hw.c | 132 +++++-
.../marvell/prestera/prestera_router_hw.h | 44 ++
7 files changed, 652 insertions(+), 7 deletions(-)
--
2.17.1
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH net-next 1/3] net: marvell: prestera: Add router LPM ABI
2022-02-16 1:05 [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading Yevhen Orlov
@ 2022-02-16 1:05 ` Yevhen Orlov
2022-02-16 1:05 ` [PATCH net-next 2/3] net: marvell: prestera: add hardware router objects accounting for lpm Yevhen Orlov
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Yevhen Orlov @ 2022-02-16 1:05 UTC (permalink / raw)
To: netdev
Cc: Volodymyr Mytnyk, Taras Chornyi, Mickey Rachamim, Serhiy Pshyk,
Yevhen Orlov, Taras Chornyi, Oleksandr Mazur, David S. Miller,
Jakub Kicinski, linux-kernel
Add functions to create/delete lpm entry in hw.
prestera_hw_lpm_add() take index of allocated virtual router.
Also it takes grp_id, which is index of allocated nexthop group.
ABI to create nexthop group will be added soon.
Co-developed-by: Taras Chornyi <tchornyi@marvell.com>
Signed-off-by: Taras Chornyi <tchornyi@marvell.com>
Co-developed-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Yevhen Orlov <yevhen.orlov@plvision.eu>
---
.../ethernet/marvell/prestera/prestera_hw.c | 49 +++++++++++++++++++
.../ethernet/marvell/prestera/prestera_hw.h | 6 +++
2 files changed, 55 insertions(+)
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_hw.c b/drivers/net/ethernet/marvell/prestera/prestera_hw.c
index e6bfadc874c5..fca25b796cf7 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_hw.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_hw.c
@@ -55,6 +55,8 @@ enum prestera_cmd_type_t {
PRESTERA_CMD_TYPE_ROUTER_RIF_CREATE = 0x600,
PRESTERA_CMD_TYPE_ROUTER_RIF_DELETE = 0x601,
+ PRESTERA_CMD_TYPE_ROUTER_LPM_ADD = 0x610,
+ PRESTERA_CMD_TYPE_ROUTER_LPM_DELETE = 0x611,
PRESTERA_CMD_TYPE_ROUTER_VR_CREATE = 0x630,
PRESTERA_CMD_TYPE_ROUTER_VR_DELETE = 0x631,
@@ -499,6 +501,15 @@ struct prestera_msg_iface {
u8 __pad[3];
};
+struct prestera_msg_ip_addr {
+ union {
+ __be32 ipv4;
+ __be32 ipv6[4];
+ } u;
+ u8 v; /* e.g. PRESTERA_IPV4 */
+ u8 __pad[3];
+};
+
struct prestera_msg_rif_req {
struct prestera_msg_cmd cmd;
struct prestera_msg_iface iif;
@@ -515,6 +526,15 @@ struct prestera_msg_rif_resp {
u8 __pad[2];
};
+struct prestera_msg_lpm_req {
+ struct prestera_msg_cmd cmd;
+ struct prestera_msg_ip_addr dst;
+ __le32 grp_id;
+ __le32 dst_len;
+ __le16 vr_id;
+ u8 __pad[2];
+};
+
struct prestera_msg_vr_req {
struct prestera_msg_cmd cmd;
__le16 vr_id;
@@ -598,9 +618,11 @@ static void prestera_hw_build_tests(void)
BUILD_BUG_ON(sizeof(struct prestera_msg_counter_stats) != 16);
BUILD_BUG_ON(sizeof(struct prestera_msg_rif_req) != 36);
BUILD_BUG_ON(sizeof(struct prestera_msg_vr_req) != 8);
+ BUILD_BUG_ON(sizeof(struct prestera_msg_lpm_req) != 36);
/* structure that are part of req/resp fw messages */
BUILD_BUG_ON(sizeof(struct prestera_msg_iface) != 16);
+ BUILD_BUG_ON(sizeof(struct prestera_msg_ip_addr) != 20);
/* check responses */
BUILD_BUG_ON(sizeof(struct prestera_msg_common_resp) != 8);
@@ -1891,6 +1913,33 @@ int prestera_hw_vr_delete(struct prestera_switch *sw, u16 vr_id)
sizeof(req));
}
+int prestera_hw_lpm_add(struct prestera_switch *sw, u16 vr_id,
+ __be32 dst, u32 dst_len, u32 grp_id)
+{
+ struct prestera_msg_lpm_req req = {
+ .dst_len = __cpu_to_le32(dst_len),
+ .vr_id = __cpu_to_le16(vr_id),
+ .grp_id = __cpu_to_le32(grp_id),
+ .dst.u.ipv4 = dst
+ };
+
+ return prestera_cmd(sw, PRESTERA_CMD_TYPE_ROUTER_LPM_ADD, &req.cmd,
+ sizeof(req));
+}
+
+int prestera_hw_lpm_del(struct prestera_switch *sw, u16 vr_id,
+ __be32 dst, u32 dst_len)
+{
+ struct prestera_msg_lpm_req req = {
+ .dst_len = __cpu_to_le32(dst_len),
+ .vr_id = __cpu_to_le16(vr_id),
+ .dst.u.ipv4 = dst
+ };
+
+ return prestera_cmd(sw, PRESTERA_CMD_TYPE_ROUTER_LPM_DELETE, &req.cmd,
+ sizeof(req));
+}
+
int prestera_hw_rxtx_init(struct prestera_switch *sw,
struct prestera_rxtx_params *params)
{
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_hw.h b/drivers/net/ethernet/marvell/prestera/prestera_hw.h
index 3ff12bae5909..fd896a8838bb 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_hw.h
+++ b/drivers/net/ethernet/marvell/prestera/prestera_hw.h
@@ -249,6 +249,12 @@ int prestera_hw_rif_delete(struct prestera_switch *sw, u16 rif_id,
int prestera_hw_vr_create(struct prestera_switch *sw, u16 *vr_id);
int prestera_hw_vr_delete(struct prestera_switch *sw, u16 vr_id);
+/* LPM PI */
+int prestera_hw_lpm_add(struct prestera_switch *sw, u16 vr_id,
+ __be32 dst, u32 dst_len, u32 grp_id);
+int prestera_hw_lpm_del(struct prestera_switch *sw, u16 vr_id,
+ __be32 dst, u32 dst_len);
+
/* Event handlers */
int prestera_hw_event_handler_register(struct prestera_switch *sw,
enum prestera_event_type type,
--
2.17.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH net-next 2/3] net: marvell: prestera: add hardware router objects accounting for lpm
2022-02-16 1:05 [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading Yevhen Orlov
2022-02-16 1:05 ` [PATCH net-next 1/3] net: marvell: prestera: Add router LPM ABI Yevhen Orlov
@ 2022-02-16 1:05 ` Yevhen Orlov
2022-02-16 1:05 ` [PATCH net-next 3/3] net: marvell: prestera: handle fib notifications Yevhen Orlov
2022-02-17 20:50 ` [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading patchwork-bot+netdevbpf
3 siblings, 0 replies; 5+ messages in thread
From: Yevhen Orlov @ 2022-02-16 1:05 UTC (permalink / raw)
To: netdev
Cc: Volodymyr Mytnyk, Taras Chornyi, Mickey Rachamim, Serhiy Pshyk,
Yevhen Orlov, Taras Chornyi, Oleksandr Mazur, David S. Miller,
Jakub Kicinski, linux-kernel
Add new router_hw object "fib_node". For now it support only DROP and
TRAP mode.
Co-developed-by: Taras Chornyi <tchornyi@marvell.com>
Signed-off-by: Taras Chornyi <tchornyi@marvell.com>
Co-developed-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Yevhen Orlov <yevhen.orlov@plvision.eu>
---
.../net/ethernet/marvell/prestera/prestera.h | 1 +
.../marvell/prestera/prestera_router_hw.c | 132 +++++++++++++++++-
.../marvell/prestera/prestera_router_hw.h | 44 ++++++
3 files changed, 170 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/marvell/prestera/prestera.h b/drivers/net/ethernet/marvell/prestera/prestera.h
index 2fd9ef2fe5d6..dcaddf685d21 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera.h
+++ b/drivers/net/ethernet/marvell/prestera/prestera.h
@@ -281,6 +281,7 @@ struct prestera_router {
struct prestera_switch *sw;
struct list_head vr_list;
struct list_head rif_entry_list;
+ struct rhashtable fib_ht;
struct notifier_block inetaddr_nb;
struct notifier_block inetaddr_valid_nb;
};
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c b/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c
index e5592b69ad37..d62adb970dd5 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c
@@ -9,23 +9,41 @@
#include "prestera_acl.h"
/* +--+
- * +------->|vr|
- * | +--+
- * |
- * +-+-------+
- * |rif_entry|
- * +---------+
- * Rif is
+ * +------->|vr|<-+
+ * | +--+ |
+ * | |
+ * +-+-------+ +--+---+-+
+ * |rif_entry| |fib_node|
+ * +---------+ +--------+
+ * Rif is Fib - is exit point
* used as
* entry point
* for vr in hw
*/
+#define PRESTERA_NHGR_UNUSED (0)
+#define PRESTERA_NHGR_DROP (0xFFFFFFFF)
+
+static const struct rhashtable_params __prestera_fib_ht_params = {
+ .key_offset = offsetof(struct prestera_fib_node, key),
+ .head_offset = offsetof(struct prestera_fib_node, ht_node),
+ .key_len = sizeof(struct prestera_fib_key),
+ .automatic_shrinking = true,
+};
+
int prestera_router_hw_init(struct prestera_switch *sw)
{
+ int err;
+
+ err = rhashtable_init(&sw->router->fib_ht,
+ &__prestera_fib_ht_params);
+ if (err)
+ goto err_fib_ht_init;
+
INIT_LIST_HEAD(&sw->router->vr_list);
INIT_LIST_HEAD(&sw->router->rif_entry_list);
+err_fib_ht_init:
return 0;
}
@@ -33,6 +51,7 @@ void prestera_router_hw_fini(struct prestera_switch *sw)
{
WARN_ON(!list_empty(&sw->router->vr_list));
WARN_ON(!list_empty(&sw->router->rif_entry_list));
+ rhashtable_destroy(&sw->router->fib_ht);
}
static struct prestera_vr *__prestera_vr_find(struct prestera_switch *sw,
@@ -212,3 +231,102 @@ prestera_rif_entry_create(struct prestera_switch *sw,
err_kzalloc:
return NULL;
}
+
+struct prestera_fib_node *
+prestera_fib_node_find(struct prestera_switch *sw, struct prestera_fib_key *key)
+{
+ struct prestera_fib_node *fib_node;
+
+ fib_node = rhashtable_lookup_fast(&sw->router->fib_ht, key,
+ __prestera_fib_ht_params);
+ return IS_ERR(fib_node) ? NULL : fib_node;
+}
+
+static void __prestera_fib_node_destruct(struct prestera_switch *sw,
+ struct prestera_fib_node *fib_node)
+{
+ struct prestera_vr *vr;
+
+ vr = fib_node->info.vr;
+ prestera_hw_lpm_del(sw, vr->hw_vr_id, fib_node->key.addr.u.ipv4,
+ fib_node->key.prefix_len);
+ switch (fib_node->info.type) {
+ case PRESTERA_FIB_TYPE_TRAP:
+ break;
+ case PRESTERA_FIB_TYPE_DROP:
+ break;
+ default:
+ pr_err("Unknown fib_node->info.type = %d",
+ fib_node->info.type);
+ }
+
+ prestera_vr_put(sw, vr);
+}
+
+void prestera_fib_node_destroy(struct prestera_switch *sw,
+ struct prestera_fib_node *fib_node)
+{
+ __prestera_fib_node_destruct(sw, fib_node);
+ rhashtable_remove_fast(&sw->router->fib_ht, &fib_node->ht_node,
+ __prestera_fib_ht_params);
+ kfree(fib_node);
+}
+
+struct prestera_fib_node *
+prestera_fib_node_create(struct prestera_switch *sw,
+ struct prestera_fib_key *key,
+ enum prestera_fib_type fib_type)
+{
+ struct prestera_fib_node *fib_node;
+ u32 grp_id;
+ struct prestera_vr *vr;
+ int err;
+
+ fib_node = kzalloc(sizeof(*fib_node), GFP_KERNEL);
+ if (!fib_node)
+ goto err_kzalloc;
+
+ memcpy(&fib_node->key, key, sizeof(*key));
+ fib_node->info.type = fib_type;
+
+ vr = prestera_vr_get(sw, key->tb_id, NULL);
+ if (IS_ERR(vr))
+ goto err_vr_get;
+
+ fib_node->info.vr = vr;
+
+ switch (fib_type) {
+ case PRESTERA_FIB_TYPE_TRAP:
+ grp_id = PRESTERA_NHGR_UNUSED;
+ break;
+ case PRESTERA_FIB_TYPE_DROP:
+ grp_id = PRESTERA_NHGR_DROP;
+ break;
+ default:
+ pr_err("Unsupported fib_type %d", fib_type);
+ goto err_nh_grp_get;
+ }
+
+ err = prestera_hw_lpm_add(sw, vr->hw_vr_id, key->addr.u.ipv4,
+ key->prefix_len, grp_id);
+ if (err)
+ goto err_lpm_add;
+
+ err = rhashtable_insert_fast(&sw->router->fib_ht, &fib_node->ht_node,
+ __prestera_fib_ht_params);
+ if (err)
+ goto err_ht_insert;
+
+ return fib_node;
+
+err_ht_insert:
+ prestera_hw_lpm_del(sw, vr->hw_vr_id, key->addr.u.ipv4,
+ key->prefix_len);
+err_lpm_add:
+err_nh_grp_get:
+ prestera_vr_put(sw, vr);
+err_vr_get:
+ kfree(fib_node);
+err_kzalloc:
+ return NULL;
+}
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_router_hw.h b/drivers/net/ethernet/marvell/prestera/prestera_router_hw.h
index b6b028551868..67dbb49c8bd4 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_router_hw.h
+++ b/drivers/net/ethernet/marvell/prestera/prestera_router_hw.h
@@ -22,6 +22,42 @@ struct prestera_rif_entry {
struct list_head router_node; /* ht */
};
+struct prestera_ip_addr {
+ union {
+ __be32 ipv4;
+ struct in6_addr ipv6;
+ } u;
+ enum {
+ PRESTERA_IPV4 = 0,
+ PRESTERA_IPV6
+ } v;
+};
+
+struct prestera_fib_key {
+ struct prestera_ip_addr addr;
+ u32 prefix_len;
+ u32 tb_id;
+};
+
+struct prestera_fib_info {
+ struct prestera_vr *vr;
+ struct list_head vr_node;
+ enum prestera_fib_type {
+ PRESTERA_FIB_TYPE_INVALID = 0,
+ /* It can be connected route
+ * and will be overlapped with neighbours
+ */
+ PRESTERA_FIB_TYPE_TRAP,
+ PRESTERA_FIB_TYPE_DROP
+ } type;
+};
+
+struct prestera_fib_node {
+ struct rhash_head ht_node; /* node of prestera_vr */
+ struct prestera_fib_key key;
+ struct prestera_fib_info info; /* action related info */
+};
+
struct prestera_rif_entry *
prestera_rif_entry_find(const struct prestera_switch *sw,
const struct prestera_rif_entry_key *k);
@@ -31,6 +67,14 @@ struct prestera_rif_entry *
prestera_rif_entry_create(struct prestera_switch *sw,
struct prestera_rif_entry_key *k,
u32 tb_id, const unsigned char *addr);
+struct prestera_fib_node *prestera_fib_node_find(struct prestera_switch *sw,
+ struct prestera_fib_key *key);
+void prestera_fib_node_destroy(struct prestera_switch *sw,
+ struct prestera_fib_node *fib_node);
+struct prestera_fib_node *
+prestera_fib_node_create(struct prestera_switch *sw,
+ struct prestera_fib_key *key,
+ enum prestera_fib_type fib_type);
int prestera_router_hw_init(struct prestera_switch *sw);
void prestera_router_hw_fini(struct prestera_switch *sw);
--
2.17.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH net-next 3/3] net: marvell: prestera: handle fib notifications
2022-02-16 1:05 [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading Yevhen Orlov
2022-02-16 1:05 ` [PATCH net-next 1/3] net: marvell: prestera: Add router LPM ABI Yevhen Orlov
2022-02-16 1:05 ` [PATCH net-next 2/3] net: marvell: prestera: add hardware router objects accounting for lpm Yevhen Orlov
@ 2022-02-16 1:05 ` Yevhen Orlov
2022-02-17 20:50 ` [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading patchwork-bot+netdevbpf
3 siblings, 0 replies; 5+ messages in thread
From: Yevhen Orlov @ 2022-02-16 1:05 UTC (permalink / raw)
To: netdev
Cc: Volodymyr Mytnyk, Taras Chornyi, Mickey Rachamim, Serhiy Pshyk,
Yevhen Orlov, Taras Chornyi, Oleksandr Mazur, David S. Miller,
Jakub Kicinski, linux-kernel
For now we support only TRAP or DROP, so we can offload only "local" or
"blackhole" routes.
Nexthop routes is TRAP for now. Will be implemented soon.
Co-developed-by: Taras Chornyi <tchornyi@marvell.com>
Signed-off-by: Taras Chornyi <tchornyi@marvell.com>
Co-developed-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Yevhen Orlov <yevhen.orlov@plvision.eu>
---
.../net/ethernet/marvell/prestera/prestera.h | 4 +
.../ethernet/marvell/prestera/prestera_main.c | 11 +
.../marvell/prestera/prestera_router.c | 412 ++++++++++++++++++
3 files changed, 427 insertions(+)
diff --git a/drivers/net/ethernet/marvell/prestera/prestera.h b/drivers/net/ethernet/marvell/prestera/prestera.h
index dcaddf685d21..6f754ae2a584 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera.h
+++ b/drivers/net/ethernet/marvell/prestera/prestera.h
@@ -282,8 +282,10 @@ struct prestera_router {
struct list_head vr_list;
struct list_head rif_entry_list;
struct rhashtable fib_ht;
+ struct rhashtable kern_fib_cache_ht;
struct notifier_block inetaddr_nb;
struct notifier_block inetaddr_valid_nb;
+ struct notifier_block fib_nb;
};
struct prestera_rxtx_params {
@@ -326,6 +328,8 @@ int prestera_port_cfg_mac_write(struct prestera_port *port,
struct prestera_port *prestera_port_dev_lower_find(struct net_device *dev);
+void prestera_queue_work(struct work_struct *work);
+
int prestera_port_pvid_set(struct prestera_port *port, u16 vid);
bool prestera_netdev_check(const struct net_device *dev);
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_main.c b/drivers/net/ethernet/marvell/prestera/prestera_main.c
index cad93f747d0c..a180b6812e54 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_main.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_main.c
@@ -28,6 +28,12 @@
#define PRESTERA_MAC_ADDR_NUM_MAX 255
static struct workqueue_struct *prestera_wq;
+static struct workqueue_struct *prestera_owq;
+
+void prestera_queue_work(struct work_struct *work)
+{
+ queue_work(prestera_owq, work);
+}
int prestera_port_pvid_set(struct prestera_port *port, u16 vid)
{
@@ -1024,12 +1030,17 @@ static int __init prestera_module_init(void)
if (!prestera_wq)
return -ENOMEM;
+ prestera_owq = alloc_ordered_workqueue("prestera_ordered", 0);
+ if (!prestera_owq)
+ return -ENOMEM;
+
return 0;
}
static void __exit prestera_module_exit(void)
{
destroy_workqueue(prestera_wq);
+ destroy_workqueue(prestera_owq);
}
module_init(prestera_module_init);
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_router.c b/drivers/net/ethernet/marvell/prestera/prestera_router.c
index 6ef4d32b8fdd..54ebda61bfea 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_router.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_router.c
@@ -5,10 +5,39 @@
#include <linux/types.h>
#include <linux/inetdevice.h>
#include <net/switchdev.h>
+#include <linux/rhashtable.h>
#include "prestera.h"
#include "prestera_router_hw.h"
+struct prestera_kern_fib_cache_key {
+ struct prestera_ip_addr addr;
+ u32 prefix_len;
+ u32 kern_tb_id; /* tb_id from kernel (not fixed) */
+};
+
+/* Subscribing on neighbours in kernel */
+struct prestera_kern_fib_cache {
+ struct prestera_kern_fib_cache_key key;
+ struct {
+ struct prestera_fib_key fib_key;
+ enum prestera_fib_type fib_type;
+ } lpm_info; /* hold prepared lpm info */
+ /* Indicate if route is not overlapped by another table */
+ struct rhash_head ht_node; /* node of prestera_router */
+ struct fib_info *fi;
+ u8 kern_tos;
+ u8 kern_type;
+ bool reachable;
+};
+
+static const struct rhashtable_params __prestera_kern_fib_cache_ht_params = {
+ .key_offset = offsetof(struct prestera_kern_fib_cache, key),
+ .head_offset = offsetof(struct prestera_kern_fib_cache, ht_node),
+ .key_len = sizeof(struct prestera_kern_fib_cache_key),
+ .automatic_shrinking = true,
+};
+
/* This util to be used, to convert kernel rules for default vr in hw_vr */
static u32 prestera_fix_tb_id(u32 tb_id)
{
@@ -20,6 +49,290 @@ static u32 prestera_fix_tb_id(u32 tb_id)
return tb_id;
}
+static void
+prestera_util_fen_info2fib_cache_key(struct fib_entry_notifier_info *fen_info,
+ struct prestera_kern_fib_cache_key *key)
+{
+ memset(key, 0, sizeof(*key));
+ key->addr.u.ipv4 = cpu_to_be32(fen_info->dst);
+ key->prefix_len = fen_info->dst_len;
+ key->kern_tb_id = fen_info->tb_id;
+}
+
+static struct prestera_kern_fib_cache *
+prestera_kern_fib_cache_find(struct prestera_switch *sw,
+ struct prestera_kern_fib_cache_key *key)
+{
+ struct prestera_kern_fib_cache *fib_cache;
+
+ fib_cache =
+ rhashtable_lookup_fast(&sw->router->kern_fib_cache_ht, key,
+ __prestera_kern_fib_cache_ht_params);
+ return IS_ERR(fib_cache) ? NULL : fib_cache;
+}
+
+static void
+prestera_kern_fib_cache_destroy(struct prestera_switch *sw,
+ struct prestera_kern_fib_cache *fib_cache)
+{
+ fib_info_put(fib_cache->fi);
+ rhashtable_remove_fast(&sw->router->kern_fib_cache_ht,
+ &fib_cache->ht_node,
+ __prestera_kern_fib_cache_ht_params);
+ kfree(fib_cache);
+}
+
+/* Operations on fi (offload, etc) must be wrapped in utils.
+ * This function just create storage.
+ */
+static struct prestera_kern_fib_cache *
+prestera_kern_fib_cache_create(struct prestera_switch *sw,
+ struct prestera_kern_fib_cache_key *key,
+ struct fib_info *fi, u8 tos, u8 type)
+{
+ struct prestera_kern_fib_cache *fib_cache;
+ int err;
+
+ fib_cache = kzalloc(sizeof(*fib_cache), GFP_KERNEL);
+ if (!fib_cache)
+ goto err_kzalloc;
+
+ memcpy(&fib_cache->key, key, sizeof(*key));
+ fib_info_hold(fi);
+ fib_cache->fi = fi;
+ fib_cache->kern_tos = tos;
+ fib_cache->kern_type = type;
+
+ err = rhashtable_insert_fast(&sw->router->kern_fib_cache_ht,
+ &fib_cache->ht_node,
+ __prestera_kern_fib_cache_ht_params);
+ if (err)
+ goto err_ht_insert;
+
+ return fib_cache;
+
+err_ht_insert:
+ fib_info_put(fi);
+ kfree(fib_cache);
+err_kzalloc:
+ return NULL;
+}
+
+static void
+__prestera_k_arb_fib_lpm_offload_set(struct prestera_switch *sw,
+ struct prestera_kern_fib_cache *fc,
+ bool fail, bool offload, bool trap)
+{
+ struct fib_rt_info fri;
+
+ if (fc->key.addr.v != PRESTERA_IPV4)
+ return;
+
+ fri.fi = fc->fi;
+ fri.tb_id = fc->key.kern_tb_id;
+ fri.dst = fc->key.addr.u.ipv4;
+ fri.dst_len = fc->key.prefix_len;
+ fri.tos = fc->kern_tos;
+ fri.type = fc->kern_type;
+ /* flags begin */
+ fri.offload = offload;
+ fri.trap = trap;
+ fri.offload_failed = fail;
+ /* flags end */
+ fib_alias_hw_flags_set(&init_net, &fri);
+}
+
+static int
+__prestera_pr_k_arb_fc_lpm_info_calc(struct prestera_switch *sw,
+ struct prestera_kern_fib_cache *fc)
+{
+ memset(&fc->lpm_info, 0, sizeof(fc->lpm_info));
+
+ switch (fc->fi->fib_type) {
+ case RTN_UNICAST:
+ fc->lpm_info.fib_type = PRESTERA_FIB_TYPE_TRAP;
+ break;
+ /* Unsupported. Leave it for kernel: */
+ case RTN_BROADCAST:
+ case RTN_MULTICAST:
+ /* Routes we must trap by design: */
+ case RTN_LOCAL:
+ case RTN_UNREACHABLE:
+ case RTN_PROHIBIT:
+ fc->lpm_info.fib_type = PRESTERA_FIB_TYPE_TRAP;
+ break;
+ case RTN_BLACKHOLE:
+ fc->lpm_info.fib_type = PRESTERA_FIB_TYPE_DROP;
+ break;
+ default:
+ dev_err(sw->dev->dev, "Unsupported fib_type");
+ return -EOPNOTSUPP;
+ }
+
+ fc->lpm_info.fib_key.addr = fc->key.addr;
+ fc->lpm_info.fib_key.prefix_len = fc->key.prefix_len;
+ fc->lpm_info.fib_key.tb_id = prestera_fix_tb_id(fc->key.kern_tb_id);
+
+ return 0;
+}
+
+static int __prestera_k_arb_f_lpm_set(struct prestera_switch *sw,
+ struct prestera_kern_fib_cache *fc,
+ bool enabled)
+{
+ struct prestera_fib_node *fib_node;
+
+ fib_node = prestera_fib_node_find(sw, &fc->lpm_info.fib_key);
+ if (fib_node)
+ prestera_fib_node_destroy(sw, fib_node);
+
+ if (!enabled)
+ return 0;
+
+ fib_node = prestera_fib_node_create(sw, &fc->lpm_info.fib_key,
+ fc->lpm_info.fib_type);
+
+ if (!fib_node) {
+ dev_err(sw->dev->dev, "fib_node=NULL %pI4n/%d kern_tb_id = %d",
+ &fc->key.addr.u.ipv4, fc->key.prefix_len,
+ fc->key.kern_tb_id);
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
+static int __prestera_k_arb_fc_apply(struct prestera_switch *sw,
+ struct prestera_kern_fib_cache *fc)
+{
+ int err;
+
+ err = __prestera_pr_k_arb_fc_lpm_info_calc(sw, fc);
+ if (err)
+ return err;
+
+ err = __prestera_k_arb_f_lpm_set(sw, fc, fc->reachable);
+ if (err) {
+ __prestera_k_arb_fib_lpm_offload_set(sw, fc,
+ true, false, false);
+ return err;
+ }
+
+ switch (fc->lpm_info.fib_type) {
+ case PRESTERA_FIB_TYPE_TRAP:
+ __prestera_k_arb_fib_lpm_offload_set(sw, fc, false,
+ false, fc->reachable);
+ break;
+ case PRESTERA_FIB_TYPE_DROP:
+ __prestera_k_arb_fib_lpm_offload_set(sw, fc, false, true,
+ fc->reachable);
+ break;
+ case PRESTERA_FIB_TYPE_INVALID:
+ break;
+ }
+
+ return 0;
+}
+
+static struct prestera_kern_fib_cache *
+__prestera_k_arb_util_fib_overlaps(struct prestera_switch *sw,
+ struct prestera_kern_fib_cache *fc)
+{
+ struct prestera_kern_fib_cache_key fc_key;
+ struct prestera_kern_fib_cache *rfc;
+
+ /* TODO: parse kernel rules */
+ rfc = NULL;
+ if (fc->key.kern_tb_id == RT_TABLE_LOCAL) {
+ memcpy(&fc_key, &fc->key, sizeof(fc_key));
+ fc_key.kern_tb_id = RT_TABLE_MAIN;
+ rfc = prestera_kern_fib_cache_find(sw, &fc_key);
+ }
+
+ return rfc;
+}
+
+static struct prestera_kern_fib_cache *
+__prestera_k_arb_util_fib_overlapped(struct prestera_switch *sw,
+ struct prestera_kern_fib_cache *fc)
+{
+ struct prestera_kern_fib_cache_key fc_key;
+ struct prestera_kern_fib_cache *rfc;
+
+ /* TODO: parse kernel rules */
+ rfc = NULL;
+ if (fc->key.kern_tb_id == RT_TABLE_MAIN) {
+ memcpy(&fc_key, &fc->key, sizeof(fc_key));
+ fc_key.kern_tb_id = RT_TABLE_LOCAL;
+ rfc = prestera_kern_fib_cache_find(sw, &fc_key);
+ }
+
+ return rfc;
+}
+
+static int
+prestera_k_arb_fib_evt(struct prestera_switch *sw,
+ bool replace, /* replace or del */
+ struct fib_entry_notifier_info *fen_info)
+{
+ struct prestera_kern_fib_cache *tfib_cache, *bfib_cache; /* top/btm */
+ struct prestera_kern_fib_cache_key fc_key;
+ struct prestera_kern_fib_cache *fib_cache;
+ int err;
+
+ prestera_util_fen_info2fib_cache_key(fen_info, &fc_key);
+ fib_cache = prestera_kern_fib_cache_find(sw, &fc_key);
+ if (fib_cache) {
+ fib_cache->reachable = false;
+ err = __prestera_k_arb_fc_apply(sw, fib_cache);
+ if (err)
+ dev_err(sw->dev->dev,
+ "Applying destroyed fib_cache failed");
+
+ bfib_cache = __prestera_k_arb_util_fib_overlaps(sw, fib_cache);
+ tfib_cache = __prestera_k_arb_util_fib_overlapped(sw, fib_cache);
+ if (!tfib_cache && bfib_cache) {
+ bfib_cache->reachable = true;
+ err = __prestera_k_arb_fc_apply(sw, bfib_cache);
+ if (err)
+ dev_err(sw->dev->dev,
+ "Applying fib_cache btm failed");
+ }
+
+ prestera_kern_fib_cache_destroy(sw, fib_cache);
+ }
+
+ if (replace) {
+ fib_cache = prestera_kern_fib_cache_create(sw, &fc_key,
+ fen_info->fi,
+ fen_info->tos,
+ fen_info->type);
+ if (!fib_cache) {
+ dev_err(sw->dev->dev, "fib_cache == NULL");
+ return -ENOENT;
+ }
+
+ bfib_cache = __prestera_k_arb_util_fib_overlaps(sw, fib_cache);
+ tfib_cache = __prestera_k_arb_util_fib_overlapped(sw, fib_cache);
+ if (!tfib_cache)
+ fib_cache->reachable = true;
+
+ if (bfib_cache) {
+ bfib_cache->reachable = false;
+ err = __prestera_k_arb_fc_apply(sw, bfib_cache);
+ if (err)
+ dev_err(sw->dev->dev,
+ "Applying fib_cache btm failed");
+ }
+
+ err = __prestera_k_arb_fc_apply(sw, fib_cache);
+ if (err)
+ dev_err(sw->dev->dev, "Applying fib_cache failed");
+ }
+
+ return 0;
+}
+
static int __prestera_inetaddr_port_event(struct net_device *port_dev,
unsigned long event,
struct netlink_ext_ack *extack)
@@ -137,6 +450,89 @@ static int __prestera_inetaddr_valid_cb(struct notifier_block *nb,
return notifier_from_errno(err);
}
+struct prestera_fib_event_work {
+ struct work_struct work;
+ struct prestera_switch *sw;
+ struct fib_entry_notifier_info fen_info;
+ unsigned long event;
+};
+
+static void __prestera_router_fib_event_work(struct work_struct *work)
+{
+ struct prestera_fib_event_work *fib_work =
+ container_of(work, struct prestera_fib_event_work, work);
+ struct prestera_switch *sw = fib_work->sw;
+ int err;
+
+ rtnl_lock();
+
+ switch (fib_work->event) {
+ case FIB_EVENT_ENTRY_REPLACE:
+ err = prestera_k_arb_fib_evt(sw, true, &fib_work->fen_info);
+ if (err)
+ goto err_out;
+
+ break;
+ case FIB_EVENT_ENTRY_DEL:
+ err = prestera_k_arb_fib_evt(sw, false, &fib_work->fen_info);
+ if (err)
+ goto err_out;
+
+ break;
+ }
+
+ goto out;
+
+err_out:
+ dev_err(sw->dev->dev, "Error when processing %pI4h/%d",
+ &fib_work->fen_info.dst,
+ fib_work->fen_info.dst_len);
+out:
+ fib_info_put(fib_work->fen_info.fi);
+ rtnl_unlock();
+ kfree(fib_work);
+}
+
+/* Called with rcu_read_lock() */
+static int __prestera_router_fib_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct prestera_fib_event_work *fib_work;
+ struct fib_entry_notifier_info *fen_info;
+ struct fib_notifier_info *info = ptr;
+ struct prestera_router *router;
+
+ if (info->family != AF_INET)
+ return NOTIFY_DONE;
+
+ router = container_of(nb, struct prestera_router, fib_nb);
+
+ switch (event) {
+ case FIB_EVENT_ENTRY_REPLACE:
+ case FIB_EVENT_ENTRY_DEL:
+ fen_info = container_of(info, struct fib_entry_notifier_info,
+ info);
+ if (!fen_info->fi)
+ return NOTIFY_DONE;
+
+ fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
+ if (WARN_ON(!fib_work))
+ return NOTIFY_BAD;
+
+ fib_info_hold(fen_info->fi);
+ fib_work->fen_info = *fen_info;
+ fib_work->event = event;
+ fib_work->sw = router->sw;
+ INIT_WORK(&fib_work->work, __prestera_router_fib_event_work);
+ prestera_queue_work(&fib_work->work);
+ break;
+ default:
+ return NOTIFY_DONE;
+ }
+
+ return NOTIFY_DONE;
+}
+
int prestera_router_init(struct prestera_switch *sw)
{
struct prestera_router *router;
@@ -153,6 +549,11 @@ int prestera_router_init(struct prestera_switch *sw)
if (err)
goto err_router_lib_init;
+ err = rhashtable_init(&router->kern_fib_cache_ht,
+ &__prestera_kern_fib_cache_ht_params);
+ if (err)
+ goto err_kern_fib_cache_ht_init;
+
router->inetaddr_valid_nb.notifier_call = __prestera_inetaddr_valid_cb;
err = register_inetaddr_validator_notifier(&router->inetaddr_valid_nb);
if (err)
@@ -163,11 +564,21 @@ int prestera_router_init(struct prestera_switch *sw)
if (err)
goto err_register_inetaddr_notifier;
+ router->fib_nb.notifier_call = __prestera_router_fib_event;
+ err = register_fib_notifier(&init_net, &router->fib_nb,
+ /* TODO: flush fib entries */ NULL, NULL);
+ if (err)
+ goto err_register_fib_notifier;
+
return 0;
+err_register_fib_notifier:
+ unregister_inetaddr_notifier(&router->inetaddr_nb);
err_register_inetaddr_notifier:
unregister_inetaddr_validator_notifier(&router->inetaddr_valid_nb);
err_register_inetaddr_validator_notifier:
+ rhashtable_destroy(&router->kern_fib_cache_ht);
+err_kern_fib_cache_ht_init:
prestera_router_hw_fini(sw);
err_router_lib_init:
kfree(sw->router);
@@ -178,6 +589,7 @@ void prestera_router_fini(struct prestera_switch *sw)
{
unregister_inetaddr_notifier(&sw->router->inetaddr_nb);
unregister_inetaddr_validator_notifier(&sw->router->inetaddr_valid_nb);
+ rhashtable_destroy(&sw->router->kern_fib_cache_ht);
prestera_router_hw_fini(sw);
kfree(sw->router);
sw->router = NULL;
--
2.17.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading
2022-02-16 1:05 [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading Yevhen Orlov
` (2 preceding siblings ...)
2022-02-16 1:05 ` [PATCH net-next 3/3] net: marvell: prestera: handle fib notifications Yevhen Orlov
@ 2022-02-17 20:50 ` patchwork-bot+netdevbpf
3 siblings, 0 replies; 5+ messages in thread
From: patchwork-bot+netdevbpf @ 2022-02-17 20:50 UTC (permalink / raw)
To: Yevhen Orlov
Cc: netdev, volodymyr.mytnyk, taras.chornyi, mickeyr, serhiy.pshyk,
tchornyi, oleksandr.mazur, davem, kuba, linux-kernel
Hello:
This series was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:
On Wed, 16 Feb 2022 03:05:54 +0200 you wrote:
> Add support for blackhole and local routes for Marvell Prestera driver.
> Subscribe on fib notifications and handle add/del.
>
> Add features:
> - Support route adding.
> e.g.: "ip route add blackhole 7.7.1.1/24"
> e.g.: "ip route add local 9.9.9.9 dev sw1p30"
> - Support "rt_trap", "rt_offload", "rt_offload_failed" flags
> - Handle case, when route in "local" table overlaps route in "main" table
> example:
> ip ro add blackhole 7.7.7.7
> ip ro add local 7.7.7.7 dev sw1p30
> # blackhole route will be deoffloaded. rt_offload flag disappeared
>
> [...]
Here is the summary with links:
- [net-next,1/3] net: marvell: prestera: Add router LPM ABI
https://git.kernel.org/netdev/net-next/c/19787b93f814
- [net-next,2/3] net: marvell: prestera: add hardware router objects accounting for lpm
https://git.kernel.org/netdev/net-next/c/16de3db1208a
- [net-next,3/3] net: marvell: prestera: handle fib notifications
https://git.kernel.org/netdev/net-next/c/4394fbcb78cf
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-02-17 20:50 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-02-16 1:05 [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading Yevhen Orlov
2022-02-16 1:05 ` [PATCH net-next 1/3] net: marvell: prestera: Add router LPM ABI Yevhen Orlov
2022-02-16 1:05 ` [PATCH net-next 2/3] net: marvell: prestera: add hardware router objects accounting for lpm Yevhen Orlov
2022-02-16 1:05 ` [PATCH net-next 3/3] net: marvell: prestera: handle fib notifications Yevhen Orlov
2022-02-17 20:50 ` [PATCH net-next 0/3] net: marvell: prestera: add basic routes offloading patchwork-bot+netdevbpf
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