From: Alistair Popple <apopple@nvidia.com>
To: <linux-mm@kvack.org>, <nouveau@lists.freedesktop.org>,
<bskeggs@redhat.com>, <akpm@linux-foundation.org>
Cc: rcampbell@nvidia.com, daniel@ffwll.ch, linux-doc@vger.kernel.org,
Alistair Popple <apopple@nvidia.com>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
hch@infradead.org, jgg@nvidia.com
Subject: [Nouveau] [PATCH v3 7/8] nouveau/svm: Refactor nouveau_range_fault
Date: Fri, 26 Feb 2021 18:18:31 +1100 [thread overview]
Message-ID: <20210226071832.31547-8-apopple@nvidia.com> (raw)
In-Reply-To: <20210226071832.31547-1-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>
---
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 f18bd53da052..cd7b47c946cf 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:[~2021-02-26 7:19 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-26 7:18 [Nouveau] [PATCH v3 0/8] Add support for SVM atomics in Nouveau Alistair Popple
2021-02-26 7:18 ` [Nouveau] [PATCH v3 1/8] mm: Remove special swap entry functions Alistair Popple
2021-02-26 15:59 ` Christoph Hellwig
2021-03-02 8:52 ` Alistair Popple
2021-03-02 12:02 ` Alistair Popple
2021-03-01 17:46 ` Jason Gunthorpe
2021-03-02 0:21 ` Alistair Popple
2021-02-26 7:18 ` [Nouveau] [PATCH v3 2/8] mm/swapops: Rework swap entry manipulation code Alistair Popple
2021-02-26 16:00 ` Christoph Hellwig
2021-03-01 17:47 ` Jason Gunthorpe
2021-02-26 7:18 ` [Nouveau] [PATCH v3 3/8] mm/rmap: Split try_to_munlock from try_to_unmap Alistair Popple
2021-02-26 16:01 ` Christoph Hellwig
2021-03-01 16:10 ` Jason Gunthorpe
2021-03-04 4:27 ` Alistair Popple
2021-02-26 7:18 ` [Nouveau] [PATCH v3 4/8] mm/rmap: Split migration into its own function Alistair Popple
2021-02-26 16:03 ` Christoph Hellwig
2021-03-02 22:08 ` Zi Yan
2021-03-04 23:54 ` Alistair Popple
2021-02-26 7:18 ` [Nouveau] [PATCH v3 5/8] mm: Device exclusive memory access Alistair Popple
2021-03-01 17:54 ` Jason Gunthorpe
2021-03-01 22:55 ` Ralph Campbell
2021-03-02 0:05 ` Jason Gunthorpe
2021-03-02 8:57 ` Alistair Popple
2021-03-02 12:41 ` Jason Gunthorpe
2021-03-04 5:20 ` Alistair Popple
2021-02-26 7:18 ` [Nouveau] [PATCH v3 6/8] mm: Selftests for exclusive device memory Alistair Popple
2021-03-01 17:55 ` Jason Gunthorpe
2021-03-01 18:07 ` Ralph Campbell
2021-03-01 23:14 ` Ralph Campbell
2021-03-02 9:12 ` Alistair Popple
2021-02-26 7:18 ` Alistair Popple [this message]
2021-02-26 7:18 ` [Nouveau] [PATCH v3 8/8] nouveau/svm: Implement atomic SVM access Alistair Popple
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