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Message-Id: <20190108061645.25226-4-leon@kernel.org>
Date: Tue, 8 Jan 2019 08:16:43 +0200
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>,
Haggai Eran <haggaie@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>,
linux-netdev <netdev@...r.kernel.org>
Subject: [PATCH rdma-next v2 3/5] RDMA/mlx5: Introduce and reuse helper to identify ODP MR
From: Leon Romanovsky <leonro@...lanox.com>
Consolidate various checks if MR is ODP backed to one simple
helper and update call sites to use it.
Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
---
drivers/infiniband/hw/mlx5/mlx5_ib.h | 10 ++++++++++
drivers/infiniband/hw/mlx5/mr.c | 19 +++----------------
drivers/infiniband/hw/mlx5/odp.c | 6 +++---
3 files changed, 16 insertions(+), 19 deletions(-)
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index 93c288a4de2b..81efa5def8ad 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -36,6 +36,7 @@
#include <linux/kernel.h>
#include <linux/sched.h>
#include <rdma/ib_verbs.h>
+#include <rdma/ib_umem.h>
#include <rdma/ib_smi.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/cq.h>
@@ -589,6 +590,12 @@ struct mlx5_ib_mr {
wait_queue_head_t q_leaf_free;
};
+static inline bool is_odp_mr(struct mlx5_ib_mr *mr)
+{
+ return IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING) && mr->umem &&
+ mr->umem->is_odp;
+}
+
struct mlx5_ib_mw {
struct ib_mw ibmw;
struct mlx5_core_mkey mmkey;
@@ -1213,6 +1220,9 @@ mlx5_ib_advise_mr_prefetch(struct ib_pd *pd,
{
return -EOPNOTSUPP;
}
+static inline void mlx5_ib_invalidate_range(struct ib_umem_odp *umem_odp,
+ unsigned long start,
+ unsigned long end){};
#endif /* CONFIG_INFINIBAND_ON_DEMAND_PAGING */
/* Needed for rep profile */
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index fd6ea1f75085..30dce3a22bbb 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -71,10 +71,8 @@ static int destroy_mkey(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
{
int err = mlx5_core_destroy_mkey(dev->mdev, &mr->mmkey);
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
/* Wait until all page fault handlers using the mr complete. */
synchronize_srcu(&dev->mr_srcu);
-#endif
return err;
}
@@ -95,10 +93,9 @@ static bool use_umr_mtt_update(struct mlx5_ib_mr *mr, u64 start, u64 length)
length + (start & (MLX5_ADAPTER_PAGE_SIZE - 1));
}
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
static void update_odp_mr(struct mlx5_ib_mr *mr)
{
- if (mr->umem->is_odp) {
+ if (is_odp_mr(mr)) {
/*
* This barrier prevents the compiler from moving the
* setting of umem->odp_data->private to point to our
@@ -121,7 +118,6 @@ static void update_odp_mr(struct mlx5_ib_mr *mr)
smp_wmb();
}
}
-#endif
static void reg_mr_callback(int status, void *context)
{
@@ -256,9 +252,7 @@ static void remove_keys(struct mlx5_ib_dev *dev, int c, int num)
mlx5_core_destroy_mkey(dev->mdev, &mr->mmkey);
}
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
synchronize_srcu(&dev->mr_srcu);
-#endif
list_for_each_entry_safe(mr, tmp_mr, &del_list, list) {
list_del(&mr->list);
@@ -591,9 +585,7 @@ static void clean_keys(struct mlx5_ib_dev *dev, int c)
mlx5_core_destroy_mkey(dev->mdev, &mr->mmkey);
}
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
synchronize_srcu(&dev->mr_srcu);
-#endif
list_for_each_entry_safe(mr, tmp_mr, &del_list, list) {
list_del(&mr->list);
@@ -1386,9 +1378,7 @@ struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
mr->umem = umem;
set_mr_fields(dev, mr, npages, length, access_flags);
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
update_odp_mr(mr);
-#endif
if (!populate_mtts) {
int update_xlt_flags = MLX5_IB_UPD_XLT_ENABLE;
@@ -1553,9 +1543,7 @@ int mlx5_ib_rereg_user_mr(struct ib_mr *ib_mr, int flags, u64 start,
set_mr_fields(dev, mr, npages, len, access_flags);
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
update_odp_mr(mr);
-#endif
return 0;
err:
@@ -1641,8 +1629,7 @@ static void dereg_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
int npages = mr->npages;
struct ib_umem *umem = mr->umem;
-#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
- if (umem && umem->is_odp) {
+ if (is_odp_mr(mr)) {
struct ib_umem_odp *umem_odp = to_ib_umem_odp(umem);
/* Prevent new page faults from succeeding */
@@ -1666,7 +1653,7 @@ static void dereg_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
/* Avoid double-freeing the umem. */
umem = NULL;
}
-#endif
+
clean_mr(dev, mr);
/*
diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
index 01e0f6200631..37d6653f9636 100644
--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c
@@ -103,7 +103,7 @@ static int check_parent(struct ib_umem_odp *odp,
struct ib_ucontext_per_mm *mr_to_per_mm(struct mlx5_ib_mr *mr)
{
- if (WARN_ON(!mr || !mr->umem || !mr->umem->is_odp))
+ if (WARN_ON(!mr || !is_odp_mr(mr)))
return NULL;
return to_ib_umem_odp(mr->umem)->per_mm;
@@ -739,12 +739,12 @@ static int pagefault_single_data_segment(struct mlx5_ib_dev *dev, u32 key,
goto srcu_unlock;
}
- if (prefetch && !mr->umem->is_odp) {
+ if (prefetch && !is_odp_mr(mr)) {
ret = -EINVAL;
goto srcu_unlock;
}
- if (!mr->umem->is_odp) {
+ if (!is_odp_mr(mr)) {
mlx5_ib_dbg(dev, "skipping non ODP MR (lkey=0x%06x) in page fault handler.\n",
key);
if (bytes_mapped)
--
2.19.1
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