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Message-Id: <f4dbb2d090b2d97ac6ba3d88605069fa2e83fff8.1624362290.git.leonro@nvidia.com>
Date: Tue, 22 Jun 2021 15:08:22 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Doug Ledford <dledford@...hat.com>,
Jason Gunthorpe <jgg@...dia.com>
Cc: Aharon Landau <aharonl@...dia.com>,
Jakub Kicinski <kuba@...nel.org>,
Jason Wang <jasowang@...hat.com>, linux-kernel@...r.kernel.org,
linux-rdma@...r.kernel.org, "Michael S. Tsirkin" <mst@...hat.com>,
netdev@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>,
Shay Drory <shayd@...dia.com>,
virtualization@...ts.linux-foundation.org
Subject: [PATCH mlx5-next 4/5] RDMA/mlx5: Change the cache structure to an rbtree
From: Aharon Landau <aharonl@...dia.com>
Currently, the cache structure is a linear array held within
mlx5_ib_dev. Each entry in the array holds a list_head of mkeys whose
sizes are the order of the entry they are in (i.e. in entry number 2
there will be mkeys of size 4, at entry 3 mkeys of size 8, and so on).
The access flags of all cached mkeys are
IB_ACCESS_DISABLE_RELAXED_ORDERING.
This structure does not allow adding new entries to the cache.
Therefore, the cache can only hold mkeys that meet the above conditions
(size of some power of 2 and access_flag =
IB_ACCESS_DISABLE_RELAXED_ORDERING).
Later in the series, we would like to allow caching mkeys with different
sizes and different access_flag. Adapting the cache structure for this
purpose.
Change the cache structure to an RB-tree, where every node is an entry
that holds an mkeys list. The tree key is the access_flag as MSB and the
size of mkey as LSB. mlx5_ib_dev will hold the root of the tree.
When initializing a device, the default entries will be generated, that
is, entries for mkeys' size = 2^x and access_flag =
IB_ACCESS_DISABLE_RELAXED_ORDERING.
Signed-off-by: Aharon Landau <aharonl@...dia.com>
Reviewed-by: Shay Drory <shayd@...dia.com>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
drivers/infiniband/hw/mlx5/main.c | 4 +-
drivers/infiniband/hw/mlx5/mlx5_ib.h | 34 +++-
drivers/infiniband/hw/mlx5/mr.c | 271 ++++++++++++++++++++-------
drivers/infiniband/hw/mlx5/odp.c | 43 +++--
include/linux/mlx5/driver.h | 4 +-
5 files changed, 261 insertions(+), 95 deletions(-)
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 849bf016d8ae..c46581686258 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -4051,7 +4051,7 @@ static void mlx5_ib_stage_pre_ib_reg_umr_cleanup(struct mlx5_ib_dev *dev)
{
int err;
- err = mlx5_mkey_cache_cleanup(dev);
+ err = mlx5_mkey_cache_tree_cleanup(dev);
if (err)
mlx5_ib_warn(dev, "mr cache cleanup failed\n");
@@ -4154,7 +4154,7 @@ static int mlx5_ib_stage_post_ib_reg_umr_init(struct mlx5_ib_dev *dev)
dev->umrc.pd = pd;
sema_init(&dev->umrc.sem, MAX_UMR_WR);
- ret = mlx5_mkey_cache_init(dev);
+ ret = mlx5_mkey_cache_tree_init(dev);
if (ret) {
mlx5_ib_warn(dev, "mr cache init failed %d\n", ret);
goto error_4;
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index ffb6f1d41f3d..e22eeceae9eb 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -749,7 +749,7 @@ struct mlx5_cache_ent {
char name[4];
- u32 order;
+ u32 order;
u32 xlt;
u32 access_mode;
u32 page;
@@ -777,11 +777,22 @@ struct mlx5_cache_ent {
struct mlx5_ib_dev *dev;
struct work_struct work;
struct delayed_work dwork;
+
+ struct rb_node node;
+ unsigned int entry_flags;
+};
+
+enum {
+ MLX5_CACHE_ENTRY_FLAG_IMR_MTT = (1 << 0),
+ MLX5_CACHE_ENTRY_FLAG_IMR_KSM = (1 << 1),
+ MLX5_CACHE_ENTRY_FLAG_REMOTE_ATOMIC = (1 << 2),
+ MLX5_CACHE_ENTRY_FLAG_RELAXED_ORDERING = (1 << 3),
};
-struct mlx5_mkey_cache {
+struct mlx5_mkey_cache_tree {
+ struct rb_root cache_root;
+ struct mutex cache_lock;
struct workqueue_struct *wq;
- struct mlx5_cache_ent ent[MAX_MKEY_CACHE_ENTRIES];
struct dentry *root;
unsigned long last_add;
};
@@ -1065,7 +1076,7 @@ struct mlx5_ib_dev {
struct mlx5_ib_resources devr;
atomic_t mkey_var;
- struct mlx5_mkey_cache cache;
+ struct mlx5_mkey_cache_tree cache;
struct timer_list delay_timer;
/* Prevents soft lock on massive reg MRs */
struct mutex slow_path_mutex;
@@ -1313,8 +1324,8 @@ void mlx5_ib_populate_pas(struct ib_umem *umem, size_t page_size, __be64 *pas,
u64 access_flags);
void mlx5_ib_copy_pas(u64 *old, u64 *new, int step, int num);
int mlx5_ib_get_cqe_size(struct ib_cq *ibcq);
-int mlx5_mkey_cache_init(struct mlx5_ib_dev *dev);
-int mlx5_mkey_cache_cleanup(struct mlx5_ib_dev *dev);
+int mlx5_mkey_cache_tree_init(struct mlx5_ib_dev *dev);
+int mlx5_mkey_cache_tree_cleanup(struct mlx5_ib_dev *dev);
struct mlx5_ib_mr *mlx5_alloc_special_mkey(struct mlx5_ib_dev *dev,
unsigned int entry,
@@ -1335,6 +1346,9 @@ int mlx5_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *wq_ind_table);
struct ib_mr *mlx5_ib_reg_dm_mr(struct ib_pd *pd, struct ib_dm *dm,
struct ib_dm_mr_attr *attr,
struct uverbs_attr_bundle *attrs);
+struct mlx5_cache_ent *mlx5_ib_create_cache_ent(struct mlx5_ib_dev *dev,
+ int entry_flags, int size,
+ int order);
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
int mlx5_ib_odp_init_one(struct mlx5_ib_dev *ibdev);
@@ -1342,7 +1356,7 @@ int mlx5r_odp_create_eq(struct mlx5_ib_dev *dev, struct mlx5_ib_pf_eq *eq);
void mlx5_ib_odp_cleanup_one(struct mlx5_ib_dev *ibdev);
int __init mlx5_ib_odp_init(void);
void mlx5_ib_odp_cleanup(void);
-void mlx5_odp_init_mkey_cache_entry(struct mlx5_cache_ent *ent);
+int mlx5_odp_init_mkey_cache_entry(struct mlx5_ib_dev *dev, int ent_num);
void mlx5_odp_populate_xlt(void *xlt, size_t idx, size_t nentries,
struct mlx5_ib_mr *mr, int flags);
@@ -1361,7 +1375,11 @@ static inline int mlx5r_odp_create_eq(struct mlx5_ib_dev *dev,
static inline void mlx5_ib_odp_cleanup_one(struct mlx5_ib_dev *ibdev) {}
static inline int mlx5_ib_odp_init(void) { return 0; }
static inline void mlx5_ib_odp_cleanup(void) {}
-static inline void mlx5_odp_init_mkey_cache_entry(struct mlx5_cache_ent *ent) {}
+static inline int mlx5_odp_init_mkey_cache_entry(struct mlx5_ib_dev *dev,
+ int ent_num)
+{
+ return 0;
+}
static inline void mlx5_odp_populate_xlt(void *xlt, size_t idx, size_t nentries,
struct mlx5_ib_mr *mr, int flags) {}
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 8d7de4eddc11..7c67aa4f1f1e 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -432,20 +432,30 @@ static const struct file_operations limit_fops = {
.read = limit_read,
};
-static bool someone_adding(struct mlx5_mkey_cache *cache)
+static bool is_special_ent(int ent_flags)
{
- unsigned int i;
+ return ent_flags &
+ (MLX5_CACHE_ENTRY_FLAG_IMR_MTT | MLX5_CACHE_ENTRY_FLAG_IMR_KSM);
+}
- for (i = 0; i < MAX_MKEY_CACHE_ENTRIES; i++) {
- struct mlx5_cache_ent *ent = &cache->ent[i];
- bool ret;
+static bool someone_adding(struct mlx5_mkey_cache_tree *cache)
+{
+ struct mlx5_cache_ent *ent;
+ struct rb_node *node;
+ bool ret;
+ mutex_lock(&cache->cache_lock);
+ for (node = rb_first(&cache->cache_root); node; node = rb_next(node)) {
+ ent = container_of(node, struct mlx5_cache_ent, node);
spin_lock_irq(&ent->lock);
ret = ent->available_mkeys < ent->limit;
spin_unlock_irq(&ent->lock);
- if (ret)
+ if (ret) {
+ mutex_unlock(&cache->cache_lock);
return true;
+ }
}
+ mutex_unlock(&cache->cache_lock);
return false;
}
@@ -486,7 +496,7 @@ static void queue_adjust_cache_locked(struct mlx5_cache_ent *ent)
static void __cache_work_func(struct mlx5_cache_ent *ent)
{
struct mlx5_ib_dev *dev = ent->dev;
- struct mlx5_mkey_cache *cache = &dev->cache;
+ struct mlx5_mkey_cache_tree *cache = &dev->cache;
int err;
spin_lock_irq(&ent->lock);
@@ -563,29 +573,142 @@ static void cache_work_func(struct work_struct *work)
__cache_work_func(ent);
}
+static int mlx5_ent_access_flags(struct mlx5_ib_dev *dev, int access_flags)
+{
+ int ret = 0;
+
+ if ((access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
+ MLX5_CAP_GEN(dev->mdev, atomic) &&
+ MLX5_CAP_GEN(dev->mdev, umr_modify_atomic_disabled))
+ ret |= MLX5_CACHE_ENTRY_FLAG_REMOTE_ATOMIC;
+
+ if ((access_flags & IB_ACCESS_RELAXED_ORDERING) &&
+ MLX5_CAP_GEN(dev->mdev, relaxed_ordering_write) &&
+ !MLX5_CAP_GEN(dev->mdev, relaxed_ordering_write_umr))
+ ret |= MLX5_CACHE_ENTRY_FLAG_RELAXED_ORDERING;
+
+ if ((access_flags & IB_ACCESS_RELAXED_ORDERING) &&
+ MLX5_CAP_GEN(dev->mdev, relaxed_ordering_read) &&
+ !MLX5_CAP_GEN(dev->mdev, relaxed_ordering_read_umr))
+ ret |= MLX5_CACHE_ENTRY_FLAG_RELAXED_ORDERING;
+
+ return ret;
+
+}
+
+static int ent_insert(struct mlx5_mkey_cache_tree *cache,
+ struct mlx5_cache_ent *ent)
+{
+ struct rb_node **new = &cache->cache_root.rb_node, *parent = NULL;
+ struct mlx5_cache_ent *this;
+
+ /* Figure out where to put new node */
+ while (*new) {
+ this = container_of(*new, struct mlx5_cache_ent, node);
+ parent = *new;
+ if (ent->entry_flags < this->entry_flags)
+ new = &((*new)->rb_left);
+ else if (ent->entry_flags > this->entry_flags)
+ new = &((*new)->rb_right);
+ else {
+ if (ent->xlt < this->xlt)
+ new = &((*new)->rb_left);
+ else if (ent->xlt > this->xlt)
+ new = &((*new)->rb_right);
+ else
+ return -EEXIST;
+ }
+ }
+
+ /* Add new node and rebalance tree. */
+ rb_link_node(&ent->node, parent, new);
+ rb_insert_color(&ent->node, &cache->cache_root);
+
+ return 0;
+}
+
+struct mlx5_cache_ent *mlx5_ib_create_cache_ent(struct mlx5_ib_dev *dev,
+ int entry_flags, int xlt_size,
+ int order)
+{
+ struct mlx5_cache_ent *ent;
+ int ret;
+
+ ent = kzalloc(sizeof(*ent), GFP_KERNEL);
+ if (!ent)
+ return ERR_PTR(-ENOMEM);
+ INIT_LIST_HEAD(&ent->head);
+ spin_lock_init(&ent->lock);
+ ent->entry_flags = entry_flags;
+ ent->xlt = xlt_size;
+ ent->order = order;
+ ent->dev = dev;
+
+ INIT_WORK(&ent->work, cache_work_func);
+ INIT_DELAYED_WORK(&ent->dwork, delayed_cache_work_func);
+
+ mutex_lock(&dev->cache.cache_lock);
+ ret = ent_insert(&dev->cache, ent);
+ mutex_unlock(&dev->cache.cache_lock);
+ if (ret) {
+ kfree(ent);
+ return ERR_PTR(ret);
+ }
+ return ent;
+}
+
+static struct mlx5_cache_ent *mkey_cache_ent_from_size(struct mlx5_ib_dev *dev,
+ int ent_flags, int size)
+{
+ struct rb_node *node = dev->cache.cache_root.rb_node;
+ struct mlx5_cache_ent *cur, *prev = NULL;
+
+ WARN_ON(!mutex_is_locked(&dev->cache.cache_lock));
+ while (node) {
+ cur = container_of(node, struct mlx5_cache_ent, node);
+
+ if (cur->entry_flags > ent_flags)
+ node = node->rb_left;
+ else if (cur->entry_flags < ent_flags)
+ node = node->rb_right;
+ else {
+ if (cur->xlt > size) {
+ prev = cur;
+ node = node->rb_left;
+ } else if (cur->xlt < size)
+ node = node->rb_right;
+ else
+ return cur;
+ }
+ }
+ return prev;
+}
+
/* Get an Mkey from a special cache entry */
struct mlx5_ib_mr *mlx5_alloc_special_mkey(struct mlx5_ib_dev *dev,
unsigned int entry, int access_flags)
{
- struct mlx5_mkey_cache *cache = &dev->cache;
struct mlx5r_cache_mkey *cmkey;
struct mlx5_cache_ent *ent;
struct mlx5_ib_mr *mr;
+ int ent_flags;
int err;
- if (WARN_ON(entry <= MKEY_CACHE_LAST_STD_ENTRY ||
- entry >= ARRAY_SIZE(cache->ent)))
+ if (WARN_ON(!is_special_ent(entry)))
return ERR_PTR(-EINVAL);
- /* Matches access in alloc_cache_mr() */
- if (!mlx5_ib_can_reconfig_with_umr(dev, 0, access_flags))
+ ent_flags = entry | mlx5_ent_access_flags(dev, access_flags);
+
+ mutex_lock(&dev->cache.cache_lock);
+ ent = mkey_cache_ent_from_size(dev, ent_flags, 0);
+ mutex_unlock(&dev->cache.cache_lock);
+ if (!ent)
return ERR_PTR(-EOPNOTSUPP);
mr = kzalloc(sizeof(*mr), GFP_KERNEL);
if (!mr)
return ERR_PTR(-ENOMEM);
- ent = &cache->ent[entry];
spin_lock_irq(&ent->lock);
if (list_empty(&ent->head)) {
spin_unlock_irq(&ent->lock);
@@ -616,13 +739,18 @@ struct mlx5_ib_mr *mlx5_alloc_special_mkey(struct mlx5_ib_dev *dev,
static struct mlx5r_cache_mkey *get_cache_mkey(struct mlx5_cache_ent *req_ent)
{
struct mlx5_ib_dev *dev = req_ent->dev;
- struct mlx5_cache_ent *ent = req_ent;
struct mlx5r_cache_mkey *cmkey;
+ struct mlx5_cache_ent *ent;
+ struct rb_node *node;
/* Try larger Mkey pools from the cache to satisfy the allocation */
- for (; ent != &dev->cache.ent[MKEY_CACHE_LAST_STD_ENTRY + 1]; ent++) {
- mlx5_ib_dbg(dev, "order %u, cache index %zu\n", ent->order,
- ent - dev->cache.ent);
+ mutex_lock(&dev->cache.cache_lock);
+ for (node = &req_ent->node; node; node = rb_next(node)) {
+ ent = container_of(node, struct mlx5_cache_ent, node);
+
+ if (ent->entry_flags != req_ent->entry_flags)
+ break;
+ mlx5_ib_dbg(dev, "size %d\n", ent->xlt);
spin_lock_irq(&ent->lock);
if (!list_empty(&ent->head)) {
@@ -632,11 +760,13 @@ static struct mlx5r_cache_mkey *get_cache_mkey(struct mlx5_cache_ent *req_ent)
ent->available_mkeys--;
queue_adjust_cache_locked(ent);
spin_unlock_irq(&ent->lock);
+ mutex_unlock(&dev->cache.cache_lock);
return cmkey;
}
queue_adjust_cache_locked(ent);
spin_unlock_irq(&ent->lock);
}
+ mutex_unlock(&dev->cache.cache_lock);
req_ent->miss++;
return NULL;
}
@@ -662,10 +792,8 @@ static int mlx5_free_mkey(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
return 0;
}
-static void clean_keys(struct mlx5_ib_dev *dev, int c)
+static void clean_keys(struct mlx5_ib_dev *dev, struct mlx5_cache_ent *ent)
{
- struct mlx5_mkey_cache *cache = &dev->cache;
- struct mlx5_cache_ent *ent = &cache->ent[c];
struct mlx5r_cache_mkey *tmp_mkey, *mkey;
LIST_HEAD(del_list);
@@ -691,7 +819,7 @@ static void clean_keys(struct mlx5_ib_dev *dev, int c)
}
}
-static void mlx5_mkey_cache_debugfs_cleanup(struct mlx5_ib_dev *dev)
+static void mlx5_mkey_cache_tree_debugfs_cleanup(struct mlx5_ib_dev *dev)
{
if (!mlx5_debugfs_root || dev->is_rep)
return;
@@ -700,20 +828,25 @@ static void mlx5_mkey_cache_debugfs_cleanup(struct mlx5_ib_dev *dev)
dev->cache.root = NULL;
}
-static void mlx5_mkey_cache_debugfs_init(struct mlx5_ib_dev *dev)
+static void mlx5_mkey_cache_tree_debugfs_init(struct mlx5_ib_dev *dev)
{
- struct mlx5_mkey_cache *cache = &dev->cache;
+ struct mlx5_mkey_cache_tree *cache = &dev->cache;
struct mlx5_cache_ent *ent;
+ struct rb_node *node;
struct dentry *dir;
- int i;
if (!mlx5_debugfs_root || dev->is_rep)
return;
cache->root = debugfs_create_dir("mr_cache", dev->mdev->priv.dbg_root);
- for (i = 0; i < MAX_MKEY_CACHE_ENTRIES; i++) {
- ent = &cache->ent[i];
+ mutex_lock(&dev->cache.cache_lock);
+ for (node = rb_first(&cache->cache_root); node; node = rb_next(node)) {
+ ent = container_of(node, struct mlx5_cache_ent, node);
+
+ if (!ent->order)
+ continue;
+
sprintf(ent->name, "%d", ent->order);
dir = debugfs_create_dir(ent->name, cache->root);
debugfs_create_file("size", 0600, dir, ent, &size_fops);
@@ -721,6 +854,7 @@ static void mlx5_mkey_cache_debugfs_init(struct mlx5_ib_dev *dev)
debugfs_create_u32("cur", 0400, dir, &ent->available_mkeys);
debugfs_create_u32("miss", 0600, dir, &ent->miss);
}
+ mutex_unlock(&dev->cache.cache_lock);
}
static void delay_time_func(struct timer_list *t)
@@ -730,13 +864,16 @@ static void delay_time_func(struct timer_list *t)
WRITE_ONCE(dev->fill_delay, 0);
}
-int mlx5_mkey_cache_init(struct mlx5_ib_dev *dev)
+int mlx5_mkey_cache_tree_init(struct mlx5_ib_dev *dev)
{
- struct mlx5_mkey_cache *cache = &dev->cache;
+ struct mlx5_mkey_cache_tree *cache = &dev->cache;
struct mlx5_cache_ent *ent;
+ int err;
int i;
mutex_init(&dev->slow_path_mutex);
+ mutex_init(&cache->cache_lock);
+ cache->cache_root = RB_ROOT;
cache->wq = alloc_ordered_workqueue("mkey_cache", WQ_MEM_RECLAIM);
if (!cache->wq) {
mlx5_ib_warn(dev, "failed to create work queue\n");
@@ -745,28 +882,25 @@ int mlx5_mkey_cache_init(struct mlx5_ib_dev *dev)
mlx5_cmd_init_async_ctx(dev->mdev, &dev->async_ctx);
timer_setup(&dev->delay_timer, delay_time_func, 0);
- for (i = 0; i < MAX_MKEY_CACHE_ENTRIES; i++) {
- ent = &cache->ent[i];
- INIT_LIST_HEAD(&ent->head);
- spin_lock_init(&ent->lock);
- ent->order = i + 2;
- ent->dev = dev;
- ent->limit = 0;
-
- INIT_WORK(&ent->work, cache_work_func);
- INIT_DELAYED_WORK(&ent->dwork, delayed_cache_work_func);
+ for (i = 0; i < MAX_MKEY_CACHE_DEFAULT_ENTRIES; i++) {
+ u8 order = i + 2;
+ u32 xlt_size = (1 << order) * sizeof(struct mlx5_mtt) /
+ MLX5_IB_UMR_OCTOWORD;
if (i > MKEY_CACHE_LAST_STD_ENTRY) {
- mlx5_odp_init_mkey_cache_entry(ent);
+ err = mlx5_odp_init_mkey_cache_entry(dev, i);
+ if (err)
+ return err;
continue;
}
- if (ent->order > mkey_cache_max_order(dev))
+ ent = mlx5_ib_create_cache_ent(dev, 0, xlt_size, order);
+ if (IS_ERR(ent))
+ return PTR_ERR(ent);
+ if (order > mkey_cache_max_order(dev))
continue;
ent->page = PAGE_SHIFT;
- ent->xlt = (1 << ent->order) * sizeof(struct mlx5_mtt) /
- MLX5_IB_UMR_OCTOWORD;
ent->access_mode = MLX5_MKC_ACCESS_MODE_MTT;
if ((dev->mdev->profile->mask & MLX5_PROF_MASK_MR_CACHE) &&
!dev->is_rep && mlx5_core_is_pf(dev->mdev) &&
@@ -778,22 +912,22 @@ int mlx5_mkey_cache_init(struct mlx5_ib_dev *dev)
queue_adjust_cache_locked(ent);
spin_unlock_irq(&ent->lock);
}
-
- mlx5_mkey_cache_debugfs_init(dev);
-
+ mlx5_mkey_cache_tree_debugfs_init(dev);
return 0;
}
-int mlx5_mkey_cache_cleanup(struct mlx5_ib_dev *dev)
+int mlx5_mkey_cache_tree_cleanup(struct mlx5_ib_dev *dev)
{
- unsigned int i;
+ struct rb_root *root = &dev->cache.cache_root;
+ struct mlx5_cache_ent *ent, *tmp;
+ struct rb_node *node;
if (!dev->cache.wq)
return 0;
- for (i = 0; i < MAX_MKEY_CACHE_ENTRIES; i++) {
- struct mlx5_cache_ent *ent = &dev->cache.ent[i];
-
+ mutex_lock(&dev->cache.cache_lock);
+ for (node = rb_first(root); node; node = rb_next(node)) {
+ ent = container_of(node, struct mlx5_cache_ent, node);
spin_lock_irq(&ent->lock);
ent->disabled = true;
spin_unlock_irq(&ent->lock);
@@ -801,11 +935,15 @@ int mlx5_mkey_cache_cleanup(struct mlx5_ib_dev *dev)
cancel_delayed_work_sync(&ent->dwork);
}
- mlx5_mkey_cache_debugfs_cleanup(dev);
+ mlx5_mkey_cache_tree_debugfs_cleanup(dev);
mlx5_cmd_cleanup_async_ctx(&dev->async_ctx);
- for (i = 0; i < MAX_MKEY_CACHE_ENTRIES; i++)
- clean_keys(dev, i);
+ rbtree_postorder_for_each_entry_safe(ent, tmp, root, node) {
+ clean_keys(dev, ent);
+ rb_erase(&ent->node, root);
+ kfree(ent);
+ }
+ mutex_unlock(&dev->cache.cache_lock);
destroy_workqueue(dev->cache.wq);
del_timer_sync(&dev->delay_timer);
@@ -921,19 +1059,6 @@ static int mlx5_ib_post_send_wait(struct mlx5_ib_dev *dev,
return err;
}
-static struct mlx5_cache_ent *mkey_cache_ent_from_order(struct mlx5_ib_dev *dev,
- unsigned int order)
-{
- struct mlx5_mkey_cache *cache = &dev->cache;
-
- if (order < cache->ent[0].order)
- return &cache->ent[0];
- order = order - cache->ent[0].order;
- if (order > MKEY_CACHE_LAST_STD_ENTRY)
- return NULL;
- return &cache->ent[order];
-}
-
static void set_mr_fields(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr,
u64 length, int access_flags)
{
@@ -964,6 +1089,8 @@ static struct mlx5_ib_mr *alloc_cacheable_mr(struct ib_pd *pd,
struct mlx5_cache_ent *ent;
struct mlx5_ib_mr *mr;
unsigned int page_size;
+ int ent_flags;
+ int xlt_size;
int ret;
if (umem->is_dmabuf)
@@ -973,14 +1100,16 @@ static struct mlx5_ib_mr *alloc_cacheable_mr(struct ib_pd *pd,
0, iova);
if (WARN_ON(!page_size))
return ERR_PTR(-EINVAL);
- ent = mkey_cache_ent_from_order(
- dev, order_base_2(ib_umem_num_dma_blocks(umem, page_size)));
+ ent_flags = mlx5_ent_access_flags(dev, access_flags);
+ xlt_size = get_octo_len(iova, umem->length, order_base_2(page_size));
+ mutex_lock(&dev->cache.cache_lock);
+ ent = mkey_cache_ent_from_size(dev, ent_flags, xlt_size);
+ mutex_unlock(&dev->cache.cache_lock);
/*
* Matches access in alloc_cache_mr(). If the MR can't come from the
* cache then synchronously create an uncached one.
*/
- if (!ent || ent->limit == 0 ||
- !mlx5_ib_can_reconfig_with_umr(dev, 0, access_flags)) {
+ if (!ent || ent->limit == 0) {
mutex_lock(&dev->slow_path_mutex);
mr = reg_create(pd, umem, iova, access_flags, page_size, false);
mutex_unlock(&dev->slow_path_mutex);
@@ -1774,7 +1903,7 @@ static bool can_use_umr_rereg_pas(struct mlx5_ib_mr *mr,
if (WARN_ON(!*page_size))
return false;
return (1ULL << mr->mmkey.cache_ent->order) >=
- ib_umem_num_dma_blocks(new_umem, *page_size);
+ ib_umem_num_dma_blocks(new_umem, *page_size);
}
static int umr_rereg_pas(struct mlx5_ib_mr *mr, struct ib_pd *pd,
diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
index 9c7942118d2c..e4a78b4c6034 100644
--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c
@@ -418,7 +418,8 @@ static struct mlx5_ib_mr *implicit_get_child_mr(struct mlx5_ib_mr *imr,
if (IS_ERR(odp))
return ERR_CAST(odp);
- mr = mlx5_alloc_special_mkey(mr_to_mdev(imr), MLX5_IMR_MTT_CACHE_ENTRY,
+ mr = mlx5_alloc_special_mkey(mr_to_mdev(imr),
+ MLX5_CACHE_ENTRY_FLAG_IMR_MTT,
imr->access_flags);
if (IS_ERR(mr)) {
ib_umem_odp_release(odp);
@@ -493,7 +494,7 @@ struct mlx5_ib_mr *mlx5_ib_alloc_implicit_mr(struct mlx5_ib_pd *pd,
if (IS_ERR(umem_odp))
return ERR_CAST(umem_odp);
- imr = mlx5_alloc_special_mkey(dev, MLX5_IMR_KSM_CACHE_ENTRY,
+ imr = mlx5_alloc_special_mkey(dev, MLX5_CACHE_ENTRY_FLAG_IMR_KSM,
access_flags);
if (IS_ERR(imr)) {
ib_umem_odp_release(umem_odp);
@@ -1605,30 +1606,48 @@ mlx5_ib_odp_destroy_eq(struct mlx5_ib_dev *dev, struct mlx5_ib_pf_eq *eq)
return err;
}
-void mlx5_odp_init_mkey_cache_entry(struct mlx5_cache_ent *ent)
+int mlx5_odp_init_mkey_cache_entry(struct mlx5_ib_dev *dev, int ent_num)
{
- if (!(ent->dev->odp_caps.general_caps & IB_ODP_SUPPORT_IMPLICIT))
- return;
+ struct mlx5_cache_ent *ent;
+ int ent_flags;
+ u32 xlt_size;
+
+ if (!(dev->odp_caps.general_caps & IB_ODP_SUPPORT_IMPLICIT))
+ return 0;
- switch (ent->order - 2) {
+ switch (ent_num) {
case MLX5_IMR_MTT_CACHE_ENTRY:
- ent->page = PAGE_SHIFT;
- ent->xlt = MLX5_IMR_MTT_ENTRIES *
- sizeof(struct mlx5_mtt) /
+ xlt_size = MLX5_IMR_MTT_ENTRIES * sizeof(struct mlx5_mtt) /
MLX5_IB_UMR_OCTOWORD;
+ ent_flags = MLX5_CACHE_ENTRY_FLAG_IMR_MTT;
+
+ ent = mlx5_ib_create_cache_ent(dev, ent_flags, xlt_size,
+ ent_num + 2);
+ if (IS_ERR(ent))
+ return PTR_ERR(ent);
+
+ ent->page = PAGE_SHIFT;
ent->access_mode = MLX5_MKC_ACCESS_MODE_MTT;
ent->limit = 0;
break;
case MLX5_IMR_KSM_CACHE_ENTRY:
- ent->page = MLX5_KSM_PAGE_SHIFT;
- ent->xlt = mlx5_imr_ksm_entries *
- sizeof(struct mlx5_klm) /
+ xlt_size = mlx5_imr_ksm_entries * sizeof(struct mlx5_klm) /
MLX5_IB_UMR_OCTOWORD;
+ ent_flags = MLX5_CACHE_ENTRY_FLAG_IMR_KSM;
+
+ ent = mlx5_ib_create_cache_ent(dev, ent_flags, xlt_size,
+ ent_num + 2);
+ if (IS_ERR(ent))
+ return PTR_ERR(ent);
+
+ ent->page = MLX5_KSM_PAGE_SHIFT;
ent->access_mode = MLX5_MKC_ACCESS_MODE_KSM;
ent->limit = 0;
break;
}
+
+ return 0;
}
static const struct ib_device_ops mlx5_ib_dev_odp_ops = {
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 8191140454e1..bb459a2ca18c 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -1080,7 +1080,7 @@ enum {
MKEY_CACHE_LAST_STD_ENTRY = 20,
MLX5_IMR_MTT_CACHE_ENTRY,
MLX5_IMR_KSM_CACHE_ENTRY,
- MAX_MKEY_CACHE_ENTRIES
+ MAX_MKEY_CACHE_DEFAULT_ENTRIES
};
/* Async-atomic event notifier used by mlx5 core to forward FW
@@ -1142,7 +1142,7 @@ struct mlx5_profile {
struct {
int size;
int limit;
- } mr_cache[MAX_MKEY_CACHE_ENTRIES];
+ } mr_cache[MAX_MKEY_CACHE_DEFAULT_ENTRIES];
};
enum {
--
2.31.1
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