From: Alistair Popple <apopple@nvidia.com>
To: <linux-mm@kvack.org>, <akpm@linux-foundation.org>
Cc: rcampbell@nvidia.com, willy@infradead.org,
linux-doc@vger.kernel.org, nouveau@lists.freedesktop.org,
Alistair Popple <apopple@nvidia.com>,
hughd@google.com, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, hch@infradead.org,
peterx@redhat.com, shakeelb@google.com, bskeggs@redhat.com,
jgg@nvidia.com
Subject: [Nouveau] [PATCH v10 09/10] nouveau/svm: Refactor nouveau_range_fault
Date: Mon, 7 Jun 2021 17:58:54 +1000 [thread overview]
Message-ID: <20210607075855.5084-10-apopple@nvidia.com> (raw)
In-Reply-To: <20210607075855.5084-1-apopple@nvidia.com>
Call mmu_interval_notifier_insert() as part of nouveau_range_fault().
This doesn't introduce any functional change but makes it easier for a
subsequent patch to alter the behaviour of nouveau_range_fault() to
support GPU atomic operations.
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
---
v9:
* Added Ben's Reviewed-By (thanks!)
---
drivers/gpu/drm/nouveau/nouveau_svm.c | 34 ++++++++++++++++-----------
1 file changed, 20 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c
index 94f841026c3b..a195e48c9aee 100644
--- a/drivers/gpu/drm/nouveau/nouveau_svm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_svm.c
@@ -567,18 +567,27 @@ static int nouveau_range_fault(struct nouveau_svmm *svmm,
unsigned long hmm_pfns[1];
struct hmm_range range = {
.notifier = ¬ifier->notifier,
- .start = notifier->notifier.interval_tree.start,
- .end = notifier->notifier.interval_tree.last + 1,
.default_flags = hmm_flags,
.hmm_pfns = hmm_pfns,
.dev_private_owner = drm->dev,
};
- struct mm_struct *mm = notifier->notifier.mm;
+ struct mm_struct *mm = svmm->notifier.mm;
int ret;
+ ret = mmu_interval_notifier_insert(¬ifier->notifier, mm,
+ args->p.addr, args->p.size,
+ &nouveau_svm_mni_ops);
+ if (ret)
+ return ret;
+
+ range.start = notifier->notifier.interval_tree.start;
+ range.end = notifier->notifier.interval_tree.last + 1;
+
while (true) {
- if (time_after(jiffies, timeout))
- return -EBUSY;
+ if (time_after(jiffies, timeout)) {
+ ret = -EBUSY;
+ goto out;
+ }
range.notifier_seq = mmu_interval_read_begin(range.notifier);
mmap_read_lock(mm);
@@ -587,7 +596,7 @@ static int nouveau_range_fault(struct nouveau_svmm *svmm,
if (ret) {
if (ret == -EBUSY)
continue;
- return ret;
+ goto out;
}
mutex_lock(&svmm->mutex);
@@ -606,6 +615,9 @@ static int nouveau_range_fault(struct nouveau_svmm *svmm,
svmm->vmm->vmm.object.client->super = false;
mutex_unlock(&svmm->mutex);
+out:
+ mmu_interval_notifier_remove(¬ifier->notifier);
+
return ret;
}
@@ -727,14 +739,8 @@ nouveau_svm_fault(struct nvif_notify *notify)
}
notifier.svmm = svmm;
- ret = mmu_interval_notifier_insert(¬ifier.notifier, mm,
- args.i.p.addr, args.i.p.size,
- &nouveau_svm_mni_ops);
- if (!ret) {
- ret = nouveau_range_fault(svmm, svm->drm, &args.i,
- sizeof(args), hmm_flags, ¬ifier);
- mmu_interval_notifier_remove(¬ifier.notifier);
- }
+ ret = nouveau_range_fault(svmm, svm->drm, &args.i,
+ sizeof(args), hmm_flags, ¬ifier);
mmput(mm);
limit = args.i.p.addr + args.i.p.size;
--
2.20.1
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next prev parent reply other threads:[~2021-06-07 7:59 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-07 7:58 [Nouveau] [PATCH v10 00/10] Add support for SVM atomics in Nouveau Alistair Popple
2021-06-07 7:58 ` [Nouveau] [PATCH v10 01/10] mm: Remove special swap entry functions Alistair Popple
2021-06-07 7:58 ` [Nouveau] [PATCH v10 02/10] mm/swapops: Rework swap entry manipulation code Alistair Popple
2021-06-07 7:58 ` [Nouveau] [PATCH v10 03/10] mm/rmap: Split try_to_munlock from try_to_unmap Alistair Popple
2021-06-07 7:58 ` [Nouveau] [PATCH v10 04/10] mm/rmap: Split migration into its own function Alistair Popple
2021-06-07 7:58 ` [Nouveau] [PATCH v10 05/10] mm: Rename migrate_pgmap_owner Alistair Popple
2021-06-08 15:16 ` Peter Xu
2021-06-07 7:58 ` [Nouveau] [PATCH v10 06/10] mm/memory.c: Allow different return codes for copy_nonpresent_pte() Alistair Popple
2021-06-08 15:19 ` Peter Xu
2021-06-07 7:58 ` [Nouveau] [PATCH v10 07/10] mm: Device exclusive memory access Alistair Popple
2021-06-08 18:33 ` Peter Xu
2021-06-09 9:38 ` Alistair Popple
2021-06-09 16:05 ` Peter Xu
2021-06-10 0:18 ` Alistair Popple
2021-06-10 18:04 ` Peter Xu
2021-06-10 14:21 ` Alistair Popple
2021-06-10 23:04 ` Peter Xu
2021-06-10 23:17 ` Alistair Popple
2021-06-11 1:00 ` Peter Xu
2021-06-11 3:43 ` Alistair Popple
2021-06-11 15:01 ` Peter Xu
2021-06-15 3:08 ` Alistair Popple
2021-06-15 16:25 ` Peter Xu
2021-06-16 2:47 ` Alistair Popple
2021-06-07 7:58 ` [Nouveau] [PATCH v10 08/10] mm: Selftests for exclusive device memory Alistair Popple
2021-06-07 7:58 ` Alistair Popple [this message]
2021-06-07 7:58 ` [Nouveau] [PATCH v10 10/10] nouveau/svm: Implement atomic SVM access Alistair Popple
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