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Date: Sun, 1 Jul 2012 12:43:40 +0300
From: Or Gerlitz <ogerlitz@...lanox.com>
To: davem@...emloft.net
Cc: roland@...nel.org, yevgenyp@...lanox.com, oren@...lanox.com,
netdev@...r.kernel.org, Hadar Hen Zion <hadarh@...lanox.co.il>,
Or Gerlitz <ogerlitz@...lanox.com>
Subject: [PATCH net-next 07/10] net/mlx4_core: Add resource tracking for device managed flow steering rules
From: Hadar Hen Zion <hadarh@...lanox.co.il>
As with other device resources, the resource tracker is needed for supporting
device managed flow steering rules under SRIOV: make sure virtual functions
delete only rules created by them, and clean all rules attached by a crashed VF.
Signed-off-by: Hadar Hen Zion <hadarh@...lanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
---
drivers/net/ethernet/mellanox/mlx4/mlx4.h | 1 +
.../net/ethernet/mellanox/mlx4/resource_tracker.c | 132 ++++++++++++++++++--
2 files changed, 125 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index 0084967..d2c436b 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -149,6 +149,7 @@ enum mlx4_resource {
RES_VLAN,
RES_EQ,
RES_COUNTER,
+ RES_FS_RULE,
MLX4_NUM_OF_RESOURCE_TYPE
};
diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
index ce73772..b4480de 100644
--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
+++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
@@ -190,6 +190,15 @@ struct res_xrcdn {
int port;
};
+enum res_fs_rule_states {
+ RES_FS_RULE_BUSY = RES_ANY_BUSY,
+ RES_FS_RULE_ALLOCATED,
+};
+
+struct res_fs_rule {
+ struct res_common com;
+};
+
static struct res_common *res_tracker_lookup(struct rb_root *root, u64 res_id)
{
struct rb_node *node = root->rb_node;
@@ -245,6 +254,7 @@ static const char *ResourceType(enum mlx4_resource rt)
case RES_MAC: return "RES_MAC";
case RES_EQ: return "RES_EQ";
case RES_COUNTER: return "RES_COUNTER";
+ case RES_FS_RULE: return "RES_FS_RULE";
case RES_XRCD: return "RES_XRCD";
default: return "Unknown resource type !!!";
};
@@ -516,6 +526,20 @@ static struct res_common *alloc_xrcdn_tr(int id)
return &ret->com;
}
+static struct res_common *alloc_fs_rule_tr(u64 id)
+{
+ struct res_fs_rule *ret;
+
+ ret = kzalloc(sizeof *ret, GFP_KERNEL);
+ if (!ret)
+ return NULL;
+
+ ret->com.res_id = id;
+ ret->com.state = RES_FS_RULE_ALLOCATED;
+
+ return &ret->com;
+}
+
static struct res_common *alloc_tr(u64 id, enum mlx4_resource type, int slave,
int extra)
{
@@ -549,6 +573,9 @@ static struct res_common *alloc_tr(u64 id, enum mlx4_resource type, int slave,
case RES_XRCD:
ret = alloc_xrcdn_tr(id);
break;
+ case RES_FS_RULE:
+ ret = alloc_fs_rule_tr(id);
+ break;
default:
return NULL;
}
@@ -681,6 +708,16 @@ static int remove_xrcdn_ok(struct res_xrcdn *res)
return 0;
}
+static int remove_fs_rule_ok(struct res_fs_rule *res)
+{
+ if (res->com.state == RES_FS_RULE_BUSY)
+ return -EBUSY;
+ else if (res->com.state != RES_FS_RULE_ALLOCATED)
+ return -EPERM;
+
+ return 0;
+}
+
static int remove_cq_ok(struct res_cq *res)
{
if (res->com.state == RES_CQ_BUSY)
@@ -722,6 +759,8 @@ static int remove_ok(struct res_common *res, enum mlx4_resource type, int extra)
return remove_counter_ok((struct res_counter *)res);
case RES_XRCD:
return remove_xrcdn_ok((struct res_xrcdn *)res);
+ case RES_FS_RULE:
+ return remove_fs_rule_ok((struct res_fs_rule *)res);
default:
return -EINVAL;
}
@@ -2746,14 +2785,28 @@ int mlx4_QP_FLOW_STEERING_ATTACH_wrapper(struct mlx4_dev *dev, int slave,
struct mlx4_cmd_mailbox *outbox,
struct mlx4_cmd_info *cmd)
{
+ int err;
+
if (dev->caps.steering_mode !=
MLX4_STEERING_MODE_DEVICE_MANAGED)
return -EOPNOTSUPP;
- return mlx4_cmd_imm(dev, inbox->dma, &vhcr->out_param,
- vhcr->in_modifier, 0,
- MLX4_QP_FLOW_STEERING_ATTACH,
- MLX4_CMD_TIME_CLASS_A,
- MLX4_CMD_NATIVE);
+
+ err = mlx4_cmd_imm(dev, inbox->dma, &vhcr->out_param,
+ vhcr->in_modifier, 0,
+ MLX4_QP_FLOW_STEERING_ATTACH, MLX4_CMD_TIME_CLASS_A,
+ MLX4_CMD_NATIVE);
+ if (err)
+ return err;
+
+ err = add_res_range(dev, slave, vhcr->out_param, 1, RES_FS_RULE, 0);
+ if (err) {
+ mlx4_err(dev, "Fail to add flow steering resources.\n ");
+ /* detach rule*/
+ mlx4_cmd(dev, vhcr->out_param, 0, 0,
+ MLX4_QP_FLOW_STEERING_ATTACH, MLX4_CMD_TIME_CLASS_A,
+ MLX4_CMD_NATIVE);
+ }
+ return err;
}
int mlx4_QP_FLOW_STEERING_DETACH_wrapper(struct mlx4_dev *dev, int slave,
@@ -2762,12 +2815,22 @@ int mlx4_QP_FLOW_STEERING_DETACH_wrapper(struct mlx4_dev *dev, int slave,
struct mlx4_cmd_mailbox *outbox,
struct mlx4_cmd_info *cmd)
{
+ int err;
+
if (dev->caps.steering_mode !=
MLX4_STEERING_MODE_DEVICE_MANAGED)
return -EOPNOTSUPP;
- return mlx4_cmd(dev, vhcr->in_param, 0, 0,
- MLX4_QP_FLOW_STEERING_DETACH, MLX4_CMD_TIME_CLASS_A,
- MLX4_CMD_NATIVE);
+
+ err = rem_res_range(dev, slave, vhcr->in_param, 1, RES_FS_RULE, 0);
+ if (err) {
+ mlx4_err(dev, "Fail to remove flow steering resources.\n ");
+ return err;
+ }
+
+ err = mlx4_cmd(dev, vhcr->in_param, 0, 0,
+ MLX4_QP_FLOW_STEERING_DETACH, MLX4_CMD_TIME_CLASS_A,
+ MLX4_CMD_NATIVE);
+ return err;
}
enum {
@@ -3179,6 +3242,58 @@ static void rem_slave_mtts(struct mlx4_dev *dev, int slave)
spin_unlock_irq(mlx4_tlock(dev));
}
+static void rem_slave_fs_rule(struct mlx4_dev *dev, int slave)
+{
+ struct mlx4_priv *priv = mlx4_priv(dev);
+ struct mlx4_resource_tracker *tracker =
+ &priv->mfunc.master.res_tracker;
+ struct list_head *fs_rule_list =
+ &tracker->slave_list[slave].res_list[RES_FS_RULE];
+ struct res_fs_rule *fs_rule;
+ struct res_fs_rule *tmp;
+ int state;
+ u64 base;
+ int err;
+
+ err = move_all_busy(dev, slave, RES_FS_RULE);
+ if (err)
+ mlx4_warn(dev, "rem_slave_fs_rule: Could not move all mtts to busy for slave %d\n",
+ slave);
+
+ spin_lock_irq(mlx4_tlock(dev));
+ list_for_each_entry_safe(fs_rule, tmp, fs_rule_list, com.list) {
+ spin_unlock_irq(mlx4_tlock(dev));
+ if (fs_rule->com.owner == slave) {
+ base = fs_rule->com.res_id;
+ state = fs_rule->com.from_state;
+ while (state != 0) {
+ switch (state) {
+ case RES_FS_RULE_ALLOCATED:
+ /* detach rule */
+ err = mlx4_cmd(dev, base, 0, 0,
+ MLX4_QP_FLOW_STEERING_DETACH,
+ MLX4_CMD_TIME_CLASS_A,
+ MLX4_CMD_NATIVE);
+
+ spin_lock_irq(mlx4_tlock(dev));
+ rb_erase(&fs_rule->com.node,
+ &tracker->res_tree[RES_FS_RULE]);
+ list_del(&fs_rule->com.list);
+ spin_unlock_irq(mlx4_tlock(dev));
+ kfree(fs_rule);
+ state = 0;
+ break;
+
+ default:
+ state = 0;
+ }
+ }
+ }
+ spin_lock_irq(mlx4_tlock(dev));
+ }
+ spin_unlock_irq(mlx4_tlock(dev));
+}
+
static void rem_slave_eqs(struct mlx4_dev *dev, int slave)
{
struct mlx4_priv *priv = mlx4_priv(dev);
@@ -3320,5 +3435,6 @@ void mlx4_delete_all_resources_for_slave(struct mlx4_dev *dev, int slave)
rem_slave_mtts(dev, slave);
rem_slave_counters(dev, slave);
rem_slave_xrcdns(dev, slave);
+ rem_slave_fs_rule(dev, slave);
mutex_unlock(&priv->mfunc.master.res_tracker.slave_list[slave].mutex);
}
--
1.7.1
--
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