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Message-Id: <20180723122512.20967-7-leon@kernel.org>
Date: Mon, 23 Jul 2018 15:25:10 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Doug Ledford <dledford@...hat.com>,
Jason Gunthorpe <jgg@...lanox.com>
Cc: Leon Romanovsky <leonro@...lanox.com>,
RDMA mailing list <linux-rdma@...r.kernel.org>,
Yishai Hadas <yishaih@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>,
linux-netdev <netdev@...r.kernel.org>
Subject: [PATCH rdma-next v2 6/8] IB/mlx5: Support adding flow steering rule by raw data
From: Yishai Hadas <yishaih@...lanox.com>
Add support to set a public flow steering rule which its destination is
a TIR by using raw specification data.
The logic follows the verbs API but instead of using ib_spec(s) the raw
input data is used.
Signed-off-by: Yishai Hadas <yishaih@...lanox.com>
Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
---
drivers/infiniband/hw/mlx5/main.c | 216 ++++++++++++++++++++++++++++++++---
drivers/infiniband/hw/mlx5/mlx5_ib.h | 2 +
2 files changed, 201 insertions(+), 17 deletions(-)
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 53e30449477e..dba3d529f49f 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -2980,11 +2980,11 @@ static void counters_clear_description(struct ib_counters *counters)
static int mlx5_ib_destroy_flow(struct ib_flow *flow_id)
{
- struct mlx5_ib_dev *dev = to_mdev(flow_id->qp->device);
struct mlx5_ib_flow_handler *handler = container_of(flow_id,
struct mlx5_ib_flow_handler,
ibflow);
struct mlx5_ib_flow_handler *iter, *tmp;
+ struct mlx5_ib_dev *dev = handler->dev;
mutex_lock(&dev->flow_db->lock);
@@ -3002,6 +3002,8 @@ static int mlx5_ib_destroy_flow(struct ib_flow *flow_id)
counters_clear_description(handler->ibcounters);
mutex_unlock(&dev->flow_db->lock);
+ if (handler->flow_matcher)
+ atomic_dec(&handler->flow_matcher->usecnt);
kfree(handler);
return 0;
@@ -3022,6 +3024,26 @@ enum flow_table_type {
#define MLX5_FS_MAX_TYPES 6
#define MLX5_FS_MAX_ENTRIES BIT(16)
+
+static struct mlx5_ib_flow_prio *_get_prio(struct mlx5_flow_namespace *ns,
+ struct mlx5_ib_flow_prio *prio,
+ int priority,
+ int num_entries, int num_groups)
+{
+ struct mlx5_flow_table *ft;
+
+ ft = mlx5_create_auto_grouped_flow_table(ns, priority,
+ num_entries,
+ num_groups,
+ 0, 0);
+ if (IS_ERR(ft))
+ return ERR_CAST(ft);
+
+ prio->flow_table = ft;
+ prio->refcount = 0;
+ return prio;
+}
+
static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev,
struct ib_flow_attr *flow_attr,
enum flow_table_type ft_type)
@@ -3034,7 +3056,6 @@ static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev,
int num_entries;
int num_groups;
int priority;
- int err = 0;
max_table_size = BIT(MLX5_CAP_FLOWTABLE_NIC_RX(dev->mdev,
log_max_ft_size));
@@ -3084,21 +3105,10 @@ static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev,
return ERR_PTR(-ENOMEM);
ft = prio->flow_table;
- if (!ft) {
- ft = mlx5_create_auto_grouped_flow_table(ns, priority,
- num_entries,
- num_groups,
- 0, 0);
-
- if (!IS_ERR(ft)) {
- prio->refcount = 0;
- prio->flow_table = ft;
- } else {
- err = PTR_ERR(ft);
- }
- }
+ if (!ft)
+ return _get_prio(ns, prio, priority, num_entries, num_groups);
- return err ? ERR_PTR(err) : prio;
+ return prio;
}
static void set_underlay_qp(struct mlx5_ib_dev *dev,
@@ -3357,6 +3367,7 @@ static struct mlx5_ib_flow_handler *_create_flow_rule(struct mlx5_ib_dev *dev,
ft_prio->refcount++;
handler->prio = ft_prio;
+ handler->dev = dev;
ft_prio->flow_table = ft;
free:
@@ -3643,13 +3654,184 @@ static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
return ERR_PTR(err);
}
+static struct mlx5_ib_flow_prio *_get_flow_table(struct mlx5_ib_dev *dev,
+ int priority, bool mcast)
+{
+ int max_table_size;
+ struct mlx5_flow_namespace *ns = NULL;
+ struct mlx5_ib_flow_prio *prio;
+
+ max_table_size = BIT(MLX5_CAP_FLOWTABLE_NIC_RX(dev->mdev,
+ log_max_ft_size));
+ if (max_table_size < MLX5_FS_MAX_ENTRIES)
+ return ERR_PTR(-ENOMEM);
+
+ if (mcast)
+ priority = MLX5_IB_FLOW_MCAST_PRIO;
+ else
+ priority = ib_prio_to_core_prio(priority, false);
+
+ ns = mlx5_get_flow_namespace(dev->mdev, MLX5_FLOW_NAMESPACE_BYPASS);
+ if (!ns)
+ return ERR_PTR(-ENOTSUPP);
+
+ prio = &dev->flow_db->prios[priority];
+
+ if (prio->flow_table)
+ return prio;
+
+ return _get_prio(ns, prio, priority, MLX5_FS_MAX_ENTRIES,
+ MLX5_FS_MAX_TYPES);
+}
+
+static struct mlx5_ib_flow_handler *
+_create_raw_flow_rule(struct mlx5_ib_dev *dev,
+ struct mlx5_ib_flow_prio *ft_prio,
+ struct mlx5_flow_destination *dst,
+ struct mlx5_ib_flow_matcher *fs_matcher,
+ void *cmd_in, int inlen)
+{
+ struct mlx5_ib_flow_handler *handler;
+ struct mlx5_flow_act flow_act = {.flow_tag = MLX5_FS_DEFAULT_FLOW_TAG};
+ struct mlx5_flow_spec *spec;
+ struct mlx5_flow_table *ft = ft_prio->flow_table;
+ int err = 0;
+
+ spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
+ handler = kzalloc(sizeof(*handler), GFP_KERNEL);
+ if (!handler || !spec) {
+ err = -ENOMEM;
+ goto free;
+ }
+
+ INIT_LIST_HEAD(&handler->list);
+
+ memcpy(spec->match_value, cmd_in, inlen);
+ memcpy(spec->match_criteria, fs_matcher->matcher_mask.match_params,
+ fs_matcher->mask_len);
+ spec->match_criteria_enable = fs_matcher->match_criteria_enable;
+
+ flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
+ handler->rule = mlx5_add_flow_rules(ft, spec,
+ &flow_act, dst, 1);
+
+ if (IS_ERR(handler->rule)) {
+ err = PTR_ERR(handler->rule);
+ goto free;
+ }
+
+ ft_prio->refcount++;
+ handler->prio = ft_prio;
+ handler->dev = dev;
+ ft_prio->flow_table = ft;
+
+free:
+ if (err)
+ kfree(handler);
+ kvfree(spec);
+ return err ? ERR_PTR(err) : handler;
+}
+
+static bool raw_fs_is_multicast(struct mlx5_ib_flow_matcher *fs_matcher,
+ void *match_v)
+{
+ void *match_c;
+ void *match_v_set_lyr_2_4, *match_c_set_lyr_2_4;
+ void *dmac, *dmac_mask;
+ void *ipv4, *ipv4_mask;
+
+ if (!(fs_matcher->match_criteria_enable &
+ (1 << MATCH_CRITERIA_ENABLE_OUTER_BIT)))
+ return false;
+
+ match_c = fs_matcher->matcher_mask.match_params;
+ match_v_set_lyr_2_4 = MLX5_ADDR_OF(fte_match_param, match_v,
+ outer_headers);
+ match_c_set_lyr_2_4 = MLX5_ADDR_OF(fte_match_param, match_c,
+ outer_headers);
+
+ dmac = MLX5_ADDR_OF(fte_match_set_lyr_2_4, match_v_set_lyr_2_4,
+ dmac_47_16);
+ dmac_mask = MLX5_ADDR_OF(fte_match_set_lyr_2_4, match_c_set_lyr_2_4,
+ dmac_47_16);
+
+ if (is_multicast_ether_addr(dmac) &&
+ is_multicast_ether_addr(dmac_mask))
+ return true;
+
+ ipv4 = MLX5_ADDR_OF(fte_match_set_lyr_2_4, match_v_set_lyr_2_4,
+ dst_ipv4_dst_ipv6.ipv4_layout.ipv4);
+
+ ipv4_mask = MLX5_ADDR_OF(fte_match_set_lyr_2_4, match_c_set_lyr_2_4,
+ dst_ipv4_dst_ipv6.ipv4_layout.ipv4);
+
+ if (ipv4_is_multicast(*(__be32 *)(ipv4)) &&
+ ipv4_is_multicast(*(__be32 *)(ipv4_mask)))
+ return true;
+
+ return false;
+}
+
struct mlx5_ib_flow_handler *
mlx5_ib_raw_fs_rule_add(struct mlx5_ib_dev *dev,
struct mlx5_ib_flow_matcher *fs_matcher,
void *cmd_in, int inlen, int dest_id,
int dest_type)
{
- return ERR_PTR(-EOPNOTSUPP);
+ struct mlx5_flow_destination *dst;
+ struct mlx5_ib_flow_prio *ft_prio;
+ int priority = fs_matcher->priority;
+ struct mlx5_ib_flow_handler *handler;
+ bool mcast;
+ int err;
+
+ if (fs_matcher->flow_type != MLX5_IB_FLOW_TYPE_NORMAL)
+ return ERR_PTR(-EOPNOTSUPP);
+
+ if (fs_matcher->priority > MLX5_IB_FLOW_LAST_PRIO)
+ return ERR_PTR(-ENOMEM);
+
+ if (dest_type != MLX5_FLOW_DESTINATION_TYPE_TIR)
+ return ERR_PTR(-ENOTSUPP);
+
+ dst = kzalloc(sizeof(*dst), GFP_KERNEL);
+ if (!dst)
+ return ERR_PTR(-ENOMEM);
+
+ mcast = raw_fs_is_multicast(fs_matcher, cmd_in);
+ mutex_lock(&dev->flow_db->lock);
+
+ ft_prio = _get_flow_table(dev, priority, mcast);
+ if (IS_ERR(ft_prio)) {
+ err = PTR_ERR(ft_prio);
+ goto unlock;
+ }
+
+ dst->type = dest_type;
+ dst->tir_num = dest_id;
+ handler = _create_raw_flow_rule(dev, ft_prio, dst, fs_matcher, cmd_in,
+ inlen);
+
+ if (IS_ERR(handler)) {
+ err = PTR_ERR(handler);
+ goto destroy_ft;
+ }
+
+ mutex_unlock(&dev->flow_db->lock);
+ atomic_inc(&fs_matcher->usecnt);
+ handler->flow_matcher = fs_matcher;
+
+ kfree(dst);
+
+ return handler;
+
+destroy_ft:
+ put_flow_table(dev, ft_prio, false);
+unlock:
+ mutex_unlock(&dev->flow_db->lock);
+ kfree(dst);
+
+ return ERR_PTR(err);
}
static u32 mlx5_ib_flow_action_flags_to_accel_xfrm_flags(u32 mlx5_flags)
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index bb5fe8de6c39..600cd3f78232 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -172,6 +172,8 @@ struct mlx5_ib_flow_handler {
struct mlx5_ib_flow_prio *prio;
struct mlx5_flow_handle *rule;
struct ib_counters *ibcounters;
+ struct mlx5_ib_dev *dev;
+ struct mlx5_ib_flow_matcher *flow_matcher;
};
struct mlx5_ib_flow_matcher {
--
2.14.4
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