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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Apr 2021 08:43:18.2912 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6f88b71c-c17c-4938-fdde-08d8f9a13144 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.34];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT038.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR12MB5348 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 4A3533C1 X-Stat-Signature: mdtzrqxiuaw4ydkacex6651nh4jnyz83 Received-SPF: none (nvidia.com>: No applicable sender policy available) receiver=imf04; identity=mailfrom; envelope-from=""; helo=NAM12-MW2-obe.outbound.protection.outlook.com; client-ip=40.107.244.50 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1617784999-592866 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 --- 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/nouv= eau/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 =3D { .notifier =3D ¬ifier->notifier, - .start =3D notifier->notifier.interval_tree.start, - .end =3D notifier->notifier.interval_tree.last + 1, .default_flags =3D hmm_flags, .hmm_pfns =3D hmm_pfns, .dev_private_owner =3D drm->dev, }; - struct mm_struct *mm =3D notifier->notifier.mm; + struct mm_struct *mm =3D svmm->notifier.mm; int ret; =20 + ret =3D mmu_interval_notifier_insert(¬ifier->notifier, mm, + args->p.addr, args->p.size, + &nouveau_svm_mni_ops); + if (ret) + return ret; + + range.start =3D notifier->notifier.interval_tree.start; + range.end =3D notifier->notifier.interval_tree.last + 1; + while (true) { - if (time_after(jiffies, timeout)) - return -EBUSY; + if (time_after(jiffies, timeout)) { + ret =3D -EBUSY; + goto out; + } =20 range.notifier_seq =3D mmu_interval_read_begin(range.notifier); mmap_read_lock(mm); @@ -587,7 +596,7 @@ static int nouveau_range_fault(struct nouveau_svmm *s= vmm, if (ret) { if (ret =3D=3D -EBUSY) continue; - return ret; + goto out; } =20 mutex_lock(&svmm->mutex); @@ -606,6 +615,9 @@ static int nouveau_range_fault(struct nouveau_svmm *s= vmm, svmm->vmm->vmm.object.client->super =3D false; mutex_unlock(&svmm->mutex); =20 +out: + mmu_interval_notifier_remove(¬ifier->notifier); + return ret; } =20 @@ -727,14 +739,8 @@ nouveau_svm_fault(struct nvif_notify *notify) } =20 notifier.svmm =3D svmm; - ret =3D mmu_interval_notifier_insert(¬ifier.notifier, mm, - args.i.p.addr, args.i.p.size, - &nouveau_svm_mni_ops); - if (!ret) { - ret =3D nouveau_range_fault(svmm, svm->drm, &args.i, - sizeof(args), hmm_flags, ¬ifier); - mmu_interval_notifier_remove(¬ifier.notifier); - } + ret =3D nouveau_range_fault(svmm, svm->drm, &args.i, + sizeof(args), hmm_flags, ¬ifier); mmput(mm); =20 limit =3D args.i.p.addr + args.i.p.size; --=20 2.20.1