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Mon, 7 Jun 2021 07:59:40 +0000 From: Alistair Popple To: , CC: , , , , , , , , , , , , , Alistair Popple Subject: [PATCH v10 09/10] nouveau/svm: Refactor nouveau_range_fault Date: Mon, 7 Jun 2021 17:58:54 +1000 Message-ID: <20210607075855.5084-10-apopple@nvidia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210607075855.5084-1-apopple@nvidia.com> References: <20210607075855.5084-1-apopple@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [172.20.187.5] X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To HQMAIL107.nvidia.com (172.20.187.13) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 07883009-46eb-4ae2-c807-08d9298a3499 X-MS-TrafficTypeDiagnostic: BN9PR12MB5226: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6108; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.112.34;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:schybrid03.nvidia.com;CAT:NONE;SFS:(4636009)(136003)(396003)(39860400002)(376002)(346002)(46966006)(36840700001)(110136005)(5660300002)(70586007)(83380400001)(70206006)(356005)(36906005)(7636003)(54906003)(2616005)(426003)(336012)(8676002)(4326008)(6666004)(186003)(86362001)(82310400003)(82740400003)(316002)(8936002)(478600001)(107886003)(1076003)(36756003)(7416002)(2906002)(16526019)(36860700001)(26005)(47076005);DIR:OUT;SFP:1101; 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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 Reviewed-by: Ben Skeggs --- 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/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