diff options
author | Hadar Hen Zion <hadarh@mellanox.co.il> | 2012-07-05 04:03:41 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2012-07-07 16:23:05 -0700 |
commit | 4af1c0488da97293c09d37ca49543566406073e6 (patch) | |
tree | 5c99c9767706f049012a148df9d979ae243709c8 | |
parent | d3a5ea6e2188adeea028c410c83c90e6b6d9347c (diff) | |
download | linux-4af1c0488da97293c09d37ca49543566406073e6.tar.bz2 |
net/mlx4_core: Change resource tracking mechanism to use red-black tree
Change the data structure used for managing the SRIOV resource tracking
mechanism from radix tree to red-black tree. This is preparation step
for supporting resource IDs which are 64bit long, such as network flow
steering rules. Such IDs can't be used as radix-tree keys on 32bit
architectures and hence the reason for the change.
Signed-off-by: Hadar Hen Zion <hadarh@mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/mlx4.h | 3 | ||||
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/resource_tracker.c | 106 |
2 files changed, 77 insertions, 32 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h index e5d20220762c..1a2f37285ef5 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h @@ -39,6 +39,7 @@ #include <linux/mutex.h> #include <linux/radix-tree.h> +#include <linux/rbtree.h> #include <linux/timer.h> #include <linux/semaphore.h> #include <linux/workqueue.h> @@ -509,7 +510,7 @@ struct slave_list { struct mlx4_resource_tracker { spinlock_t lock; /* tree for each resources */ - struct radix_tree_root res_tree[MLX4_NUM_OF_RESOURCE_TYPE]; + struct rb_root res_tree[MLX4_NUM_OF_RESOURCE_TYPE]; /* num_of_slave's lists, one per slave */ struct slave_list *slave_list; }; diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c index 766b8c5a235e..80c03c802301 100644 --- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c +++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c @@ -57,6 +57,7 @@ struct mac_res { struct res_common { struct list_head list; + struct rb_node node; u32 res_id; int owner; int state; @@ -189,6 +190,49 @@ struct res_xrcdn { int port; }; +static void *res_tracker_lookup(struct rb_root *root, u64 res_id) +{ + struct rb_node *node = root->rb_node; + + while (node) { + struct res_common *res = container_of(node, struct res_common, + node); + + if (res_id < res->res_id) + node = node->rb_left; + else if (res_id > res->res_id) + node = node->rb_right; + else + return res; + } + return NULL; +} + +static int res_tracker_insert(struct rb_root *root, struct res_common *res) +{ + struct rb_node **new = &(root->rb_node), *parent = NULL; + + /* Figure out where to put new node */ + while (*new) { + struct res_common *this = container_of(*new, struct res_common, + node); + + parent = *new; + if (res->res_id < this->res_id) + new = &((*new)->rb_left); + else if (res->res_id > this->res_id) + new = &((*new)->rb_right); + else + return -EEXIST; + } + + /* Add new node and rebalance tree. */ + rb_link_node(&res->node, parent, new); + rb_insert_color(&res->node, root); + + return 0; +} + /* For Debug uses */ static const char *ResourceType(enum mlx4_resource rt) { @@ -228,8 +272,7 @@ int mlx4_init_resource_tracker(struct mlx4_dev *dev) mlx4_dbg(dev, "Started init_resource_tracker: %ld slaves\n", dev->num_slaves); for (i = 0 ; i < MLX4_NUM_OF_RESOURCE_TYPE; i++) - INIT_RADIX_TREE(&priv->mfunc.master.res_tracker.res_tree[i], - GFP_ATOMIC|__GFP_NOWARN); + priv->mfunc.master.res_tracker.res_tree[i] = RB_ROOT; spin_lock_init(&priv->mfunc.master.res_tracker.lock); return 0 ; @@ -277,8 +320,8 @@ static void *find_res(struct mlx4_dev *dev, int res_id, { struct mlx4_priv *priv = mlx4_priv(dev); - return radix_tree_lookup(&priv->mfunc.master.res_tracker.res_tree[type], - res_id); + return res_tracker_lookup(&priv->mfunc.master.res_tracker.res_tree[type], + res_id); } static int get_res(struct mlx4_dev *dev, int slave, int res_id, @@ -523,7 +566,7 @@ static int add_res_range(struct mlx4_dev *dev, int slave, int base, int count, struct mlx4_priv *priv = mlx4_priv(dev); struct res_common **res_arr; struct mlx4_resource_tracker *tracker = &priv->mfunc.master.res_tracker; - struct radix_tree_root *root = &tracker->res_tree[type]; + struct rb_root *root = &tracker->res_tree[type]; res_arr = kzalloc(count * sizeof *res_arr, GFP_KERNEL); if (!res_arr) @@ -546,7 +589,7 @@ static int add_res_range(struct mlx4_dev *dev, int slave, int base, int count, err = -EEXIST; goto undo; } - err = radix_tree_insert(root, base + i, res_arr[i]); + err = res_tracker_insert(root, res_arr[i]); if (err) goto undo; list_add_tail(&res_arr[i]->list, @@ -559,7 +602,7 @@ static int add_res_range(struct mlx4_dev *dev, int slave, int base, int count, undo: for (--i; i >= base; --i) - radix_tree_delete(&tracker->res_tree[type], i); + rb_erase(&res_arr[i]->node, root); spin_unlock_irq(mlx4_tlock(dev)); @@ -695,7 +738,7 @@ static int rem_res_range(struct mlx4_dev *dev, int slave, int base, int count, spin_lock_irq(mlx4_tlock(dev)); for (i = base; i < base + count; ++i) { - r = radix_tree_lookup(&tracker->res_tree[type], i); + r = res_tracker_lookup(&tracker->res_tree[type], i); if (!r) { err = -ENOENT; goto out; @@ -710,8 +753,8 @@ static int rem_res_range(struct mlx4_dev *dev, int slave, int base, int count, } for (i = base; i < base + count; ++i) { - r = radix_tree_lookup(&tracker->res_tree[type], i); - radix_tree_delete(&tracker->res_tree[type], i); + r = res_tracker_lookup(&tracker->res_tree[type], i); + rb_erase(&r->node, &tracker->res_tree[type]); list_del(&r->list); kfree(r); } @@ -733,7 +776,7 @@ static int qp_res_start_move_to(struct mlx4_dev *dev, int slave, int qpn, int err = 0; spin_lock_irq(mlx4_tlock(dev)); - r = radix_tree_lookup(&tracker->res_tree[RES_QP], qpn); + r = res_tracker_lookup(&tracker->res_tree[RES_QP], qpn); if (!r) err = -ENOENT; else if (r->com.owner != slave) @@ -797,7 +840,7 @@ static int mr_res_start_move_to(struct mlx4_dev *dev, int slave, int index, int err = 0; spin_lock_irq(mlx4_tlock(dev)); - r = radix_tree_lookup(&tracker->res_tree[RES_MPT], index); + r = res_tracker_lookup(&tracker->res_tree[RES_MPT], index); if (!r) err = -ENOENT; else if (r->com.owner != slave) @@ -850,7 +893,7 @@ static int eq_res_start_move_to(struct mlx4_dev *dev, int slave, int index, int err = 0; spin_lock_irq(mlx4_tlock(dev)); - r = radix_tree_lookup(&tracker->res_tree[RES_EQ], index); + r = res_tracker_lookup(&tracker->res_tree[RES_EQ], index); if (!r) err = -ENOENT; else if (r->com.owner != slave) @@ -898,7 +941,7 @@ static int cq_res_start_move_to(struct mlx4_dev *dev, int slave, int cqn, int err; spin_lock_irq(mlx4_tlock(dev)); - r = radix_tree_lookup(&tracker->res_tree[RES_CQ], cqn); + r = res_tracker_lookup(&tracker->res_tree[RES_CQ], cqn); if (!r) err = -ENOENT; else if (r->com.owner != slave) @@ -952,7 +995,7 @@ static int srq_res_start_move_to(struct mlx4_dev *dev, int slave, int index, int err = 0; spin_lock_irq(mlx4_tlock(dev)); - r = radix_tree_lookup(&tracker->res_tree[RES_SRQ], index); + r = res_tracker_lookup(&tracker->res_tree[RES_SRQ], index); if (!r) err = -ENOENT; else if (r->com.owner != slave) @@ -1001,7 +1044,7 @@ static void res_abort_move(struct mlx4_dev *dev, int slave, struct res_common *r; spin_lock_irq(mlx4_tlock(dev)); - r = radix_tree_lookup(&tracker->res_tree[type], id); + r = res_tracker_lookup(&tracker->res_tree[type], id); if (r && (r->owner == slave)) r->state = r->from_state; spin_unlock_irq(mlx4_tlock(dev)); @@ -1015,7 +1058,7 @@ static void res_end_move(struct mlx4_dev *dev, int slave, struct res_common *r; spin_lock_irq(mlx4_tlock(dev)); - r = radix_tree_lookup(&tracker->res_tree[type], id); + r = res_tracker_lookup(&tracker->res_tree[type], id); if (r && (r->owner == slave)) r->state = r->to_state; spin_unlock_irq(mlx4_tlock(dev)); @@ -2817,8 +2860,8 @@ static void rem_slave_qps(struct mlx4_dev *dev, int slave) switch (state) { case RES_QP_RESERVED: spin_lock_irq(mlx4_tlock(dev)); - radix_tree_delete(&tracker->res_tree[RES_QP], - qp->com.res_id); + rb_erase(&qp->com.node, + &tracker->res_tree[RES_QP]); list_del(&qp->com.list); spin_unlock_irq(mlx4_tlock(dev)); kfree(qp); @@ -2888,8 +2931,8 @@ static void rem_slave_srqs(struct mlx4_dev *dev, int slave) case RES_SRQ_ALLOCATED: __mlx4_srq_free_icm(dev, srqn); spin_lock_irq(mlx4_tlock(dev)); - radix_tree_delete(&tracker->res_tree[RES_SRQ], - srqn); + rb_erase(&srq->com.node, + &tracker->res_tree[RES_SRQ]); list_del(&srq->com.list); spin_unlock_irq(mlx4_tlock(dev)); kfree(srq); @@ -2954,8 +2997,8 @@ static void rem_slave_cqs(struct mlx4_dev *dev, int slave) case RES_CQ_ALLOCATED: __mlx4_cq_free_icm(dev, cqn); spin_lock_irq(mlx4_tlock(dev)); - radix_tree_delete(&tracker->res_tree[RES_CQ], - cqn); + rb_erase(&cq->com.node, + &tracker->res_tree[RES_CQ]); list_del(&cq->com.list); spin_unlock_irq(mlx4_tlock(dev)); kfree(cq); @@ -3017,8 +3060,8 @@ static void rem_slave_mrs(struct mlx4_dev *dev, int slave) case RES_MPT_RESERVED: __mlx4_mr_release(dev, mpt->key); spin_lock_irq(mlx4_tlock(dev)); - radix_tree_delete(&tracker->res_tree[RES_MPT], - mptn); + rb_erase(&mpt->com.node, + &tracker->res_tree[RES_MPT]); list_del(&mpt->com.list); spin_unlock_irq(mlx4_tlock(dev)); kfree(mpt); @@ -3086,8 +3129,8 @@ static void rem_slave_mtts(struct mlx4_dev *dev, int slave) __mlx4_free_mtt_range(dev, base, mtt->order); spin_lock_irq(mlx4_tlock(dev)); - radix_tree_delete(&tracker->res_tree[RES_MTT], - base); + rb_erase(&mtt->com.node, + &tracker->res_tree[RES_MTT]); list_del(&mtt->com.list); spin_unlock_irq(mlx4_tlock(dev)); kfree(mtt); @@ -3133,8 +3176,8 @@ static void rem_slave_eqs(struct mlx4_dev *dev, int slave) switch (state) { case RES_EQ_RESERVED: spin_lock_irq(mlx4_tlock(dev)); - radix_tree_delete(&tracker->res_tree[RES_EQ], - eqn); + rb_erase(&eq->com.node, + &tracker->res_tree[RES_EQ]); list_del(&eq->com.list); spin_unlock_irq(mlx4_tlock(dev)); kfree(eq); @@ -3191,7 +3234,8 @@ static void rem_slave_counters(struct mlx4_dev *dev, int slave) list_for_each_entry_safe(counter, tmp, counter_list, com.list) { if (counter->com.owner == slave) { index = counter->com.res_id; - radix_tree_delete(&tracker->res_tree[RES_COUNTER], index); + rb_erase(&counter->com.node, + &tracker->res_tree[RES_COUNTER]); list_del(&counter->com.list); kfree(counter); __mlx4_counter_free(dev, index); @@ -3220,7 +3264,7 @@ static void rem_slave_xrcdns(struct mlx4_dev *dev, int slave) list_for_each_entry_safe(xrcd, tmp, xrcdn_list, com.list) { if (xrcd->com.owner == slave) { xrcdn = xrcd->com.res_id; - radix_tree_delete(&tracker->res_tree[RES_XRCD], xrcdn); + rb_erase(&xrcd->com.node, &tracker->res_tree[RES_XRCD]); list_del(&xrcd->com.list); kfree(xrcd); __mlx4_xrcd_free(dev, xrcdn); |