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-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c43
-rw-r--r--drivers/gpu/drm/i915/i915_gem_userptr.c13
-rw-r--r--drivers/gpu/drm/radeon/radeon_mn.c22
-rw-r--r--drivers/infiniband/core/umem_odp.c33
-rw-r--r--drivers/infiniband/hw/hfi1/mmu_rb.c11
-rw-r--r--drivers/infiniband/hw/mlx5/odp.c2
-rw-r--r--drivers/misc/mic/scif/scif_dma.c7
-rw-r--r--drivers/misc/sgi-gru/grutlbpurge.c7
-rw-r--r--drivers/xen/gntdev.c44
9 files changed, 143 insertions, 39 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
index a365ea2383d1..e55508b39496 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
@@ -178,12 +178,18 @@ void amdgpu_mn_unlock(struct amdgpu_mn *mn)
*
* @amn: our notifier
*/
-static void amdgpu_mn_read_lock(struct amdgpu_mn *amn)
+static int amdgpu_mn_read_lock(struct amdgpu_mn *amn, bool blockable)
{
- mutex_lock(&amn->read_lock);
+ if (blockable)
+ mutex_lock(&amn->read_lock);
+ else if (!mutex_trylock(&amn->read_lock))
+ return -EAGAIN;
+
if (atomic_inc_return(&amn->recursion) == 1)
down_read_non_owner(&amn->lock);
mutex_unlock(&amn->read_lock);
+
+ return 0;
}
/**
@@ -239,10 +245,11 @@ static void amdgpu_mn_invalidate_node(struct amdgpu_mn_node *node,
* Block for operations on BOs to finish and mark pages as accessed and
* potentially dirty.
*/
-static void amdgpu_mn_invalidate_range_start_gfx(struct mmu_notifier *mn,
+static int amdgpu_mn_invalidate_range_start_gfx(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
- unsigned long end)
+ unsigned long end,
+ bool blockable)
{
struct amdgpu_mn *amn = container_of(mn, struct amdgpu_mn, mn);
struct interval_tree_node *it;
@@ -250,17 +257,28 @@ static void amdgpu_mn_invalidate_range_start_gfx(struct mmu_notifier *mn,
/* notification is exclusive, but interval is inclusive */
end -= 1;
- amdgpu_mn_read_lock(amn);
+ /* TODO we should be able to split locking for interval tree and
+ * amdgpu_mn_invalidate_node
+ */
+ if (amdgpu_mn_read_lock(amn, blockable))
+ return -EAGAIN;
it = interval_tree_iter_first(&amn->objects, start, end);
while (it) {
struct amdgpu_mn_node *node;
+ if (!blockable) {
+ amdgpu_mn_read_unlock(amn);
+ return -EAGAIN;
+ }
+
node = container_of(it, struct amdgpu_mn_node, it);
it = interval_tree_iter_next(it, start, end);
amdgpu_mn_invalidate_node(node, start, end);
}
+
+ return 0;
}
/**
@@ -275,10 +293,11 @@ static void amdgpu_mn_invalidate_range_start_gfx(struct mmu_notifier *mn,
* necessitates evicting all user-mode queues of the process. The BOs
* are restorted in amdgpu_mn_invalidate_range_end_hsa.
*/
-static void amdgpu_mn_invalidate_range_start_hsa(struct mmu_notifier *mn,
+static int amdgpu_mn_invalidate_range_start_hsa(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
- unsigned long end)
+ unsigned long end,
+ bool blockable)
{
struct amdgpu_mn *amn = container_of(mn, struct amdgpu_mn, mn);
struct interval_tree_node *it;
@@ -286,13 +305,19 @@ static void amdgpu_mn_invalidate_range_start_hsa(struct mmu_notifier *mn,
/* notification is exclusive, but interval is inclusive */
end -= 1;
- amdgpu_mn_read_lock(amn);
+ if (amdgpu_mn_read_lock(amn, blockable))
+ return -EAGAIN;
it = interval_tree_iter_first(&amn->objects, start, end);
while (it) {
struct amdgpu_mn_node *node;
struct amdgpu_bo *bo;
+ if (!blockable) {
+ amdgpu_mn_read_unlock(amn);
+ return -EAGAIN;
+ }
+
node = container_of(it, struct amdgpu_mn_node, it);
it = interval_tree_iter_next(it, start, end);
@@ -304,6 +329,8 @@ static void amdgpu_mn_invalidate_range_start_hsa(struct mmu_notifier *mn,
amdgpu_amdkfd_evict_userptr(mem, mm);
}
}
+
+ return 0;
}
/**
diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c
index dcd6e230d16a..2c9b284036d1 100644
--- a/drivers/gpu/drm/i915/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/i915_gem_userptr.c
@@ -112,10 +112,11 @@ static void del_object(struct i915_mmu_object *mo)
mo->attached = false;
}
-static void i915_gem_userptr_mn_invalidate_range_start(struct mmu_notifier *_mn,
+static int i915_gem_userptr_mn_invalidate_range_start(struct mmu_notifier *_mn,
struct mm_struct *mm,
unsigned long start,
- unsigned long end)
+ unsigned long end,
+ bool blockable)
{
struct i915_mmu_notifier *mn =
container_of(_mn, struct i915_mmu_notifier, mn);
@@ -124,7 +125,7 @@ static void i915_gem_userptr_mn_invalidate_range_start(struct mmu_notifier *_mn,
LIST_HEAD(cancelled);
if (RB_EMPTY_ROOT(&mn->objects.rb_root))
- return;
+ return 0;
/* interval ranges are inclusive, but invalidate range is exclusive */
end--;
@@ -132,6 +133,10 @@ static void i915_gem_userptr_mn_invalidate_range_start(struct mmu_notifier *_mn,
spin_lock(&mn->lock);
it = interval_tree_iter_first(&mn->objects, start, end);
while (it) {
+ if (!blockable) {
+ spin_unlock(&mn->lock);
+ return -EAGAIN;
+ }
/* The mmu_object is released late when destroying the
* GEM object so it is entirely possible to gain a
* reference on an object in the process of being freed
@@ -154,6 +159,8 @@ static void i915_gem_userptr_mn_invalidate_range_start(struct mmu_notifier *_mn,
if (!list_empty(&cancelled))
flush_workqueue(mn->wq);
+
+ return 0;
}
static const struct mmu_notifier_ops i915_gem_userptr_notifier = {
diff --git a/drivers/gpu/drm/radeon/radeon_mn.c b/drivers/gpu/drm/radeon/radeon_mn.c
index abd24975c9b1..f8b35df44c60 100644
--- a/drivers/gpu/drm/radeon/radeon_mn.c
+++ b/drivers/gpu/drm/radeon/radeon_mn.c
@@ -118,19 +118,27 @@ static void radeon_mn_release(struct mmu_notifier *mn,
* We block for all BOs between start and end to be idle and
* unmap them by move them into system domain again.
*/
-static void radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
+static int radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
- unsigned long end)
+ unsigned long end,
+ bool blockable)
{
struct radeon_mn *rmn = container_of(mn, struct radeon_mn, mn);
struct ttm_operation_ctx ctx = { false, false };
struct interval_tree_node *it;
+ int ret = 0;
/* notification is exclusive, but interval is inclusive */
end -= 1;
- mutex_lock(&rmn->lock);
+ /* TODO we should be able to split locking for interval tree and
+ * the tear down.
+ */
+ if (blockable)
+ mutex_lock(&rmn->lock);
+ else if (!mutex_trylock(&rmn->lock))
+ return -EAGAIN;
it = interval_tree_iter_first(&rmn->objects, start, end);
while (it) {
@@ -138,6 +146,11 @@ static void radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
struct radeon_bo *bo;
long r;
+ if (!blockable) {
+ ret = -EAGAIN;
+ goto out_unlock;
+ }
+
node = container_of(it, struct radeon_mn_node, it);
it = interval_tree_iter_next(it, start, end);
@@ -166,7 +179,10 @@ static void radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
}
}
+out_unlock:
mutex_unlock(&rmn->lock);
+
+ return ret;
}
static const struct mmu_notifier_ops radeon_mn_ops = {
diff --git a/drivers/infiniband/core/umem_odp.c b/drivers/infiniband/core/umem_odp.c
index 182436b92ba9..6ec748eccff7 100644
--- a/drivers/infiniband/core/umem_odp.c
+++ b/drivers/infiniband/core/umem_odp.c
@@ -186,6 +186,7 @@ static void ib_umem_notifier_release(struct mmu_notifier *mn,
rbt_ib_umem_for_each_in_range(&context->umem_tree, 0,
ULLONG_MAX,
ib_umem_notifier_release_trampoline,
+ true,
NULL);
up_read(&context->umem_rwsem);
}
@@ -207,22 +208,31 @@ static int invalidate_range_start_trampoline(struct ib_umem *item, u64 start,
return 0;
}
-static void ib_umem_notifier_invalidate_range_start(struct mmu_notifier *mn,
+static int ib_umem_notifier_invalidate_range_start(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
- unsigned long end)
+ unsigned long end,
+ bool blockable)
{
struct ib_ucontext *context = container_of(mn, struct ib_ucontext, mn);
+ int ret;
if (!context->invalidate_range)
- return;
+ return 0;
+
+ if (blockable)
+ down_read(&context->umem_rwsem);
+ else if (!down_read_trylock(&context->umem_rwsem))
+ return -EAGAIN;
ib_ucontext_notifier_start_account(context);
- down_read(&context->umem_rwsem);
- rbt_ib_umem_for_each_in_range(&context->umem_tree, start,
+ ret = rbt_ib_umem_for_each_in_range(&context->umem_tree, start,
end,
- invalidate_range_start_trampoline, NULL);
+ invalidate_range_start_trampoline,
+ blockable, NULL);
up_read(&context->umem_rwsem);
+
+ return ret;
}
static int invalidate_range_end_trampoline(struct ib_umem *item, u64 start,
@@ -242,10 +252,15 @@ static void ib_umem_notifier_invalidate_range_end(struct mmu_notifier *mn,
if (!context->invalidate_range)
return;
+ /*
+ * TODO: we currently bail out if there is any sleepable work to be done
+ * in ib_umem_notifier_invalidate_range_start so we shouldn't really block
+ * here. But this is ugly and fragile.
+ */
down_read(&context->umem_rwsem);
rbt_ib_umem_for_each_in_range(&context->umem_tree, start,
end,
- invalidate_range_end_trampoline, NULL);
+ invalidate_range_end_trampoline, true, NULL);
up_read(&context->umem_rwsem);
ib_ucontext_notifier_end_account(context);
}
@@ -798,6 +813,7 @@ EXPORT_SYMBOL(ib_umem_odp_unmap_dma_pages);
int rbt_ib_umem_for_each_in_range(struct rb_root_cached *root,
u64 start, u64 last,
umem_call_back cb,
+ bool blockable,
void *cookie)
{
int ret_val = 0;
@@ -809,6 +825,9 @@ int rbt_ib_umem_for_each_in_range(struct rb_root_cached *root,
for (node = rbt_ib_umem_iter_first(root, start, last - 1);
node; node = next) {
+ /* TODO move the blockable decision up to the callback */
+ if (!blockable)
+ return -EAGAIN;
next = rbt_ib_umem_iter_next(node, start, last - 1);
umem = container_of(node, struct ib_umem_odp, interval_tree);
ret_val = cb(umem->umem, start, last, cookie) || ret_val;
diff --git a/drivers/infiniband/hw/hfi1/mmu_rb.c b/drivers/infiniband/hw/hfi1/mmu_rb.c
index 70aceefe14d5..e1c7996c018e 100644
--- a/drivers/infiniband/hw/hfi1/mmu_rb.c
+++ b/drivers/infiniband/hw/hfi1/mmu_rb.c
@@ -67,9 +67,9 @@ struct mmu_rb_handler {
static unsigned long mmu_node_start(struct mmu_rb_node *);
static unsigned long mmu_node_last(struct mmu_rb_node *);
-static void mmu_notifier_range_start(struct mmu_notifier *,
+static int mmu_notifier_range_start(struct mmu_notifier *,
struct mm_struct *,
- unsigned long, unsigned long);
+ unsigned long, unsigned long, bool);
static struct mmu_rb_node *__mmu_rb_search(struct mmu_rb_handler *,
unsigned long, unsigned long);
static void do_remove(struct mmu_rb_handler *handler,
@@ -284,10 +284,11 @@ void hfi1_mmu_rb_remove(struct mmu_rb_handler *handler,
handler->ops->remove(handler->ops_arg, node);
}
-static void mmu_notifier_range_start(struct mmu_notifier *mn,
+static int mmu_notifier_range_start(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
- unsigned long end)
+ unsigned long end,
+ bool blockable)
{
struct mmu_rb_handler *handler =
container_of(mn, struct mmu_rb_handler, mn);
@@ -313,6 +314,8 @@ static void mmu_notifier_range_start(struct mmu_notifier *mn,
if (added)
queue_work(handler->wq, &handler->del_work);
+
+ return 0;
}
/*
diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
index f1a87a690a4c..d216e0d2921d 100644
--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c
@@ -488,7 +488,7 @@ void mlx5_ib_free_implicit_mr(struct mlx5_ib_mr *imr)
down_read(&ctx->umem_rwsem);
rbt_ib_umem_for_each_in_range(&ctx->umem_tree, 0, ULLONG_MAX,
- mr_leaf_free, imr);
+ mr_leaf_free, true, imr);
up_read(&ctx->umem_rwsem);
wait_event(imr->q_leaf_free, !atomic_read(&imr->num_leaf_free));
diff --git a/drivers/misc/mic/scif/scif_dma.c b/drivers/misc/mic/scif/scif_dma.c
index 63d6246d6dff..6369aeaa7056 100644
--- a/drivers/misc/mic/scif/scif_dma.c
+++ b/drivers/misc/mic/scif/scif_dma.c
@@ -200,15 +200,18 @@ static void scif_mmu_notifier_release(struct mmu_notifier *mn,
schedule_work(&scif_info.misc_work);
}
-static void scif_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
+static int scif_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
- unsigned long end)
+ unsigned long end,
+ bool blockable)
{
struct scif_mmu_notif *mmn;
mmn = container_of(mn, struct scif_mmu_notif, ep_mmu_notifier);
scif_rma_destroy_tcw(mmn, start, end - start);
+
+ return 0;
}
static void scif_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn,
diff --git a/drivers/misc/sgi-gru/grutlbpurge.c b/drivers/misc/sgi-gru/grutlbpurge.c
index a3454eb56fbf..be28f05bfafa 100644
--- a/drivers/misc/sgi-gru/grutlbpurge.c
+++ b/drivers/misc/sgi-gru/grutlbpurge.c
@@ -219,9 +219,10 @@ void gru_flush_all_tlb(struct gru_state *gru)
/*
* MMUOPS notifier callout functions
*/
-static void gru_invalidate_range_start(struct mmu_notifier *mn,
+static int gru_invalidate_range_start(struct mmu_notifier *mn,
struct mm_struct *mm,
- unsigned long start, unsigned long end)
+ unsigned long start, unsigned long end,
+ bool blockable)
{
struct gru_mm_struct *gms = container_of(mn, struct gru_mm_struct,
ms_notifier);
@@ -231,6 +232,8 @@ static void gru_invalidate_range_start(struct mmu_notifier *mn,
gru_dbg(grudev, "gms %p, start 0x%lx, end 0x%lx, act %d\n", gms,
start, end, atomic_read(&gms->ms_range_active));
gru_flush_tlb_range(gms, start, end - start);
+
+ return 0;
}
static void gru_invalidate_range_end(struct mmu_notifier *mn,
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index c866a62f766d..57390c7666e5 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -479,18 +479,25 @@ static const struct vm_operations_struct gntdev_vmops = {
/* ------------------------------------------------------------------ */
+static bool in_range(struct gntdev_grant_map *map,
+ unsigned long start, unsigned long end)
+{
+ if (!map->vma)
+ return false;
+ if (map->vma->vm_start >= end)
+ return false;
+ if (map->vma->vm_end <= start)
+ return false;
+
+ return true;
+}
+
static void unmap_if_in_range(struct gntdev_grant_map *map,
unsigned long start, unsigned long end)
{
unsigned long mstart, mend;
int err;
- if (!map->vma)
- return;
- if (map->vma->vm_start >= end)
- return;
- if (map->vma->vm_end <= start)
- return;
mstart = max(start, map->vma->vm_start);
mend = min(end, map->vma->vm_end);
pr_debug("map %d+%d (%lx %lx), range %lx %lx, mrange %lx %lx\n",
@@ -503,21 +510,40 @@ static void unmap_if_in_range(struct gntdev_grant_map *map,
WARN_ON(err);
}
-static void mn_invl_range_start(struct mmu_notifier *mn,
+static int mn_invl_range_start(struct mmu_notifier *mn,
struct mm_struct *mm,
- unsigned long start, unsigned long end)
+ unsigned long start, unsigned long end,
+ bool blockable)
{
struct gntdev_priv *priv = container_of(mn, struct gntdev_priv, mn);
struct gntdev_grant_map *map;
+ int ret = 0;
+
+ /* TODO do we really need a mutex here? */
+ if (blockable)
+ mutex_lock(&priv->lock);
+ else if (!mutex_trylock(&priv->lock))
+ return -EAGAIN;
- mutex_lock(&priv->lock);
list_for_each_entry(map, &priv->maps, next) {
+ if (in_range(map, start, end)) {
+ ret = -EAGAIN;
+ goto out_unlock;
+ }
unmap_if_in_range(map, start, end);
}
list_for_each_entry(map, &priv->freeable_maps, next) {
+ if (in_range(map, start, end)) {
+ ret = -EAGAIN;
+ goto out_unlock;
+ }
unmap_if_in_range(map, start, end);
}
+
+out_unlock:
mutex_unlock(&priv->lock);
+
+ return ret;
}
static void mn_release(struct mmu_notifier *mn,
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-04 19:34:22 +0000