The hmm_mirror_ops callback function sync_cpu_device_pagetables() passes
a struct hmm_update which is a simplified version of struct
mmu_notifier_range. This is unnecessary so replace hmm_update with
mmu_notifier_range directly.
Signed-off-by: Ralph Campbell <rcampb...@nvidia.com>
Cc: "Jérôme Glisse" <jgli...@redhat.com>
Cc: Jason Gunthorpe <j...@mellanox.com>
Cc: Christoph Hellwig <h...@lst.de>
Cc: Ben Skeggs <bske...@redhat.com>
---
This is based on 5.3.0-rc1 plus Christoph Hellwig's 6 patches
("hmm_range_fault related fixes and legacy API removal v2").
Jason, I believe this is the patch you were requesting.
drivers/gpu/drm/nouveau/nouveau_svm.c | 4 ++--
include/linux/hmm.h | 31 ++++-----------------------
mm/hmm.c | 13 ++++-------
3 files changed, 10 insertions(+), 38 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c
b/drivers/gpu/drm/nouveau/nouveau_svm.c
index a9c5c58d425b..6298d2dadb55 100644
--- a/drivers/gpu/drm/nouveau/nouveau_svm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_svm.c
@@ -252,13 +252,13 @@ nouveau_svmm_invalidate(struct nouveau_svmm *svmm, u64
start, u64 limit)
static int
nouveau_svmm_sync_cpu_device_pagetables(struct hmm_mirror *mirror,
- const struct hmm_update *update)
+ const struct mmu_notifier_range *update)
{
struct nouveau_svmm *svmm = container_of(mirror, typeof(*svmm), mirror);
unsigned long start = update->start;
unsigned long limit = update->end;
- if (!update->blockable)
+ if (!mmu_notifier_range_blockable(update))
return -EAGAIN;
SVMM_DBG(svmm, "invalidate %016lx-%016lx", start, limit);
diff --git a/include/linux/hmm.h b/include/linux/hmm.h
index 9f32586684c9..659e25a15700 100644
--- a/include/linux/hmm.h
+++ b/include/linux/hmm.h
@@ -340,29 +340,6 @@ static inline uint64_t hmm_device_entry_from_pfn(const
struct hmm_range *range,
struct hmm_mirror;
-/*
- * enum hmm_update_event - type of update
- * @HMM_UPDATE_INVALIDATE: invalidate range (no indication as to why)
- */
-enum hmm_update_event {
- HMM_UPDATE_INVALIDATE,
-};
-
-/*
- * struct hmm_update - HMM update information for callback
- *
- * @start: virtual start address of the range to update
- * @end: virtual end address of the range to update
- * @event: event triggering the update (what is happening)
- * @blockable: can the callback block/sleep ?
- */
-struct hmm_update {
- unsigned long start;
- unsigned long end;
- enum hmm_update_event event;
- bool blockable;
-};
-
/*
* struct hmm_mirror_ops - HMM mirror device operations callback
*
@@ -383,9 +360,9 @@ struct hmm_mirror_ops {
/* sync_cpu_device_pagetables() - synchronize page tables
*
* @mirror: pointer to struct hmm_mirror
- * @update: update information (see struct hmm_update)
- * Return: -EAGAIN if update.blockable false and callback need to
- * block, 0 otherwise.
+ * @update: update information (see struct mmu_notifier_range)
+ * Return: -EAGAIN if mmu_notifier_range_blockable(update) is false
+ * and callback needs to block, 0 otherwise.
*
* This callback ultimately originates from mmu_notifiers when the CPU
* page table is updated. The device driver must update its page table
@@ -397,7 +374,7 @@ struct hmm_mirror_ops {
* synchronous call.
*/
int (*sync_cpu_device_pagetables)(struct hmm_mirror *mirror,
- const struct hmm_update *update);
+ const struct mmu_notifier_range *update);
};
/*
diff --git a/mm/hmm.c b/mm/hmm.c
index 16b6731a34db..b810a4fa3de9 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -165,7 +165,6 @@ static int hmm_invalidate_range_start(struct mmu_notifier
*mn,
{
struct hmm *hmm = container_of(mn, struct hmm, mmu_notifier);
struct hmm_mirror *mirror;
- struct hmm_update update;
struct hmm_range *range;
unsigned long flags;
int ret = 0;
@@ -173,15 +172,10 @@ static int hmm_invalidate_range_start(struct mmu_notifier
*mn,
if (!kref_get_unless_zero(&hmm->kref))
return 0;
- update.start = nrange->start;
- update.end = nrange->end;
- update.event = HMM_UPDATE_INVALIDATE;
- update.blockable = mmu_notifier_range_blockable(nrange);
-
spin_lock_irqsave(&hmm->ranges_lock, flags);
hmm->notifiers++;
list_for_each_entry(range, &hmm->ranges, list) {
- if (update.end < range->start || update.start >= range->end)
+ if (nrange->end < range->start || nrange->start >= range->end)
continue;
range->valid = false;
@@ -198,9 +192,10 @@ static int hmm_invalidate_range_start(struct mmu_notifier
*mn,
list_for_each_entry(mirror, &hmm->mirrors, list) {
int rc;
- rc = mirror->ops->sync_cpu_device_pagetables(mirror, &update);
+ rc = mirror->ops->sync_cpu_device_pagetables(mirror, nrange);
if (rc) {
- if (WARN_ON(update.blockable || rc != -EAGAIN))
+ if (WARN_ON(mmu_notifier_range_blockable(nrange) ||
+ rc != -EAGAIN))
continue;
ret = -EAGAIN;
break;
--
2.20.1
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