From nobody Fri Oct 3 18:00:47 2025 Received: from mail-wr1-f74.google.com (mail-wr1-f74.google.com [209.85.221.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0C5A33568EF for ; Wed, 27 Aug 2025 13:38:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756301933; cv=none; b=ilzlNDi8Yt3jkHnUUlGm7jfgZ+ms5vVZ0yu7gIzBGdAhkuzT4WYNzlTNbeBhs9d63ZLdccj0lWLdit1sB3OP2tZ/evOST8+4QT2v6A7WNWgGzIDzcMaMd6ZOYrnXLMia87Mgz3xF1vo0+rSkVsyNDp3zFc/39v0jelpxkqp+IOo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756301933; c=relaxed/simple; bh=fxqCLepdjJoG2i/XMA26WTvgMhHanXo5UFmP/6SmsUc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=C+aIledu2sqncLQSDALwSSgvz8IF4l61MMdYs5iCtOfuVQ39TKrKp8ZfdLl5sHmu5T+uImiytxE3+A+JVE/VGiu+ojad84uioAdHhTzFaSshM3Ruc5ClhlbfGhG+A5UIrjl+S36hgsMcvjrkiNOg/6DlJOPqnUYf7KgV+39rJvA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--aliceryhl.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=PndUlE39; arc=none smtp.client-ip=209.85.221.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--aliceryhl.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="PndUlE39" Received: by mail-wr1-f74.google.com with SMTP id ffacd0b85a97d-3c79f0a6084so1617292f8f.0 for ; Wed, 27 Aug 2025 06:38:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1756301929; x=1756906729; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=H0LUjaJNCERfnIpEXLt7qPeqC8Z8QMcmQ0x5DWubTsE=; b=PndUlE39BLn0MR5UT41jXfhA6+YitDW++i5WOOxAM6KgHELU1ZuRJCd9pqIe0sxhaj 630gRgde0uylLNirJ17TvB0oNWkNX7PvwEVGRIkQVzduKG8GOlyf3d4UB6ljf0gP2+/4 Av3l3HciBt28EomslByC0u8j0qIvN9sg9iEXrYzJ+XFTj36EZAOhYWRozyRqNWe7dwAX 7RdZMzZVkehmFxqDzP2tPh6h2c9pdnEj90VtkI1VVY4H/aPFDzwcb4SN0jS5ts/LGLSQ 2F5R4pIXf5KaiKEVdejkgYBLeRHgbBcK0UjJS5EZ8u19Nn0wXdLNBQ9Colni0Zfvxg1c Cmhw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756301929; x=1756906729; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=H0LUjaJNCERfnIpEXLt7qPeqC8Z8QMcmQ0x5DWubTsE=; b=UUEmw/fsv8DPDTFQcQ+JHEiFOhrPO4hKfuicEj5hDlRDMR7uGSjIm2ecIJdgy9dB7k uxcUjz7wIbtJS37omDhlfAWxo5+pm2cxAxJgpcHNuPTtbm4HBpYVBpjBM0KvXhvbFgik +VAXR2ZPk+OvXRkXd+QurURB1VbACwK6HF8dR6uSbSwrYwX0Xq9B1oGhM8nH/JNXbXbx WH5jd2sur2U42hWR8AZRLT/yvTNw4SxQPoV4SCq6JrotFpXGLO1A0+TtEOFivzROHYdB cwIEB/mkk0fakCRo3DmY2But0TTsACt4dbYCnnwYAt6bN2AAnkE8LMHktawNnOgw+8CK Wq9w== X-Forwarded-Encrypted: i=1; AJvYcCXYrvNFGXEhr5cknBJcg9Kz63VhPSAOb4aH6vtobmZNUsOUAQfQwL6alUcy++g/nDMNVVGw6YkOijwMTjc=@vger.kernel.org X-Gm-Message-State: AOJu0YyPz6ZTEjCfIk2AHpXFRLJWkW13EYdOB2pp0COWxK7CZ6q1ct1t YApGrRUdtQIISVyqlJ2EfYo3gL4JLp/suMFEdGYuRpNI6Hk7lg/NJ3pEq95CD4DBJMkhDvEFb7a J3p73kZoGHNMMBQJ0Rw== X-Google-Smtp-Source: AGHT+IGVa7PVy7PXjMz+41KLvLfZ57z1pdtrUqa1nAKHnMHdUPl5XgMWkTXVPv1ZKDQNau4tVBq+F8KPCgsVFPo= X-Received: from wrsa14.prod.google.com ([2002:adf:face:0:b0:3bb:8d5d:f554]) (user=aliceryhl job=prod-delivery.src-stubby-dispatcher) by 2002:adf:f249:0:b0:3cd:4936:7222 with SMTP id ffacd0b85a97d-3cd49367a57mr844329f8f.32.1756301929456; Wed, 27 Aug 2025 06:38:49 -0700 (PDT) Date: Wed, 27 Aug 2025 13:38:38 +0000 In-Reply-To: <20250827-gpuva-mutex-in-gem-v3-0-bd89f5a82c0d@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250827-gpuva-mutex-in-gem-v3-0-bd89f5a82c0d@google.com> X-Developer-Key: i=aliceryhl@google.com; a=openpgp; fpr=49F6C1FAA74960F43A5B86A1EE7A392FDE96209F X-Developer-Signature: v=1; a=openpgp-sha256; l=4667; i=aliceryhl@google.com; h=from:subject:message-id; bh=fxqCLepdjJoG2i/XMA26WTvgMhHanXo5UFmP/6SmsUc=; b=owEBbQKS/ZANAwAKAQRYvu5YxjlGAcsmYgBorwplBwqLgr6P1T9aVSwRfXFaYBCf/imiAkWRB GK0A7i8iw+JAjMEAAEKAB0WIQSDkqKUTWQHCvFIvbIEWL7uWMY5RgUCaK8KZQAKCRAEWL7uWMY5 Rj52D/wLX0TgtsFem9qRKwgampx8gBAoARjToXXgEsXq4iETGWCHsmsHkLXw15V6qgAz8heVyjb gQA417sWwug0le+2dg/dYL5wpWsEFZfC0xAQuWW0LBORi9EWfww3IFU5Ek3R6Z3FME/7cqcJr0P ecKJbLGlOeDS4+OrMkfgNsOOzQbXoJuojnlWn2aMDbOnSV2TZvIbZzEn2dbtpVHh2uI+u0+8WvL 4Nq+GwThibopA8/vsa1W64m03ys0skYBrhRk/z/F4RIDQaWigH8N8NaA9yEG0zQTaqi2sADSgYI ktfDbR8tikcbRyPG7IO+nQHtRpxSh5avxWYxfX8nmaPCMyGT/MW8ptpNZZ/YTS2PGPuCnwt/pco 02tgrWzHzZaf/6SDLjexaadzjgzyrPqRp1YIcaf73NOL+oAnx0PiQa932dn3aK9uJzrjGm221di AZjWf6KajMziBCDDb+OhyhLtHCvHdQoMxs2V10I3NdvM78EosQoQieMMs7UYsrjStlVF7PoM7zg 6A/QfckmicXhdRxmj1k9Z1porMrNMq7W/RHkV0Hrz1xgwCeexTww+OavJUZkHHFpn/nV074vFRK s3RWXt6MknVJc+YWFwK5/qJBQlQd129OOlAHBoiupO01wH+25GCYe83ihVJGn04NjJX6AQZSDeW TEUQbFa9rodBQiw== X-Mailer: b4 0.14.2 Message-ID: <20250827-gpuva-mutex-in-gem-v3-2-bd89f5a82c0d@google.com> Subject: [PATCH v3 2/3] panthor: use drm_gem_object.gpuva.lock instead of gpuva_list_lock From: Alice Ryhl To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Danilo Krummrich , Boris Brezillon , Daniel Almeida , Steven Price , Liviu Dudau , Rob Clark , Rob Herring Cc: Miguel Ojeda , Boqun Feng , Gary Guo , "=?utf-8?q?Bj=C3=B6rn_Roy_Baron?=" , Benno Lossin , Andreas Hindborg , Trevor Gross , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, Alice Ryhl Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Now that drm_gem_object has a dedicated mutex for the gpuva list that is intended to be used in cases that must be fence signalling safe, use it in Panthor. Reviewed-by: Boris Brezillon Signed-off-by: Alice Ryhl --- drivers/gpu/drm/panthor/panthor_gem.c | 4 +--- drivers/gpu/drm/panthor/panthor_gem.h | 12 ------------ drivers/gpu/drm/panthor/panthor_mmu.c | 16 ++++++++-------- 3 files changed, 9 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/panthor/panthor_gem.c b/drivers/gpu/drm/pantho= r/panthor_gem.c index a123bc740ba1460f96882206f598b148b64dc5f6..c654a3377903cf7e067becdb481= fb14895a4eaa5 100644 --- a/drivers/gpu/drm/panthor/panthor_gem.c +++ b/drivers/gpu/drm/panthor/panthor_gem.c @@ -74,7 +74,6 @@ static void panthor_gem_free_object(struct drm_gem_object= *obj) mutex_destroy(&bo->label.lock); =20 drm_gem_free_mmap_offset(&bo->base.base); - mutex_destroy(&bo->gpuva_list_lock); drm_gem_shmem_free(&bo->base); drm_gem_object_put(vm_root_gem); } @@ -246,8 +245,7 @@ struct drm_gem_object *panthor_gem_create_object(struct= drm_device *ddev, size_t =20 obj->base.base.funcs =3D &panthor_gem_funcs; obj->base.map_wc =3D !ptdev->coherent; - mutex_init(&obj->gpuva_list_lock); - drm_gem_gpuva_set_lock(&obj->base.base, &obj->gpuva_list_lock); + drm_gem_gpuva_set_lock(&obj->base.base, &obj->base.base.gpuva.lock); mutex_init(&obj->label.lock); =20 panthor_gem_debugfs_bo_init(obj); diff --git a/drivers/gpu/drm/panthor/panthor_gem.h b/drivers/gpu/drm/pantho= r/panthor_gem.h index 8fc7215e9b900ed162e03aebeae999fda00eeb7a..80c6e24112d0bd0f1561ae4d222= 4842afb735a59 100644 --- a/drivers/gpu/drm/panthor/panthor_gem.h +++ b/drivers/gpu/drm/panthor/panthor_gem.h @@ -79,18 +79,6 @@ struct panthor_gem_object { */ struct drm_gem_object *exclusive_vm_root_gem; =20 - /** - * @gpuva_list_lock: Custom GPUVA lock. - * - * Used to protect insertion of drm_gpuva elements to the - * drm_gem_object.gpuva.list list. - * - * We can't use the GEM resv for that, because drm_gpuva_link() is - * called in a dma-signaling path, where we're not allowed to take - * resv locks. - */ - struct mutex gpuva_list_lock; - /** @flags: Combination of drm_panthor_bo_flags flags. */ u32 flags; =20 diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/pantho= r/panthor_mmu.c index 2003b91a84097d419484c284c2d6241a82b5cde2..2881942ab5115686803fb9d9036= bc059d56b7fa3 100644 --- a/drivers/gpu/drm/panthor/panthor_mmu.c +++ b/drivers/gpu/drm/panthor/panthor_mmu.c @@ -1107,9 +1107,9 @@ static void panthor_vm_bo_put(struct drm_gpuvm_bo *vm= _bo) * GEM vm_bo list. */ dma_resv_lock(drm_gpuvm_resv(vm), NULL); - mutex_lock(&bo->gpuva_list_lock); + mutex_lock(&bo->base.base.gpuva.lock); unpin =3D drm_gpuvm_bo_put(vm_bo); - mutex_unlock(&bo->gpuva_list_lock); + mutex_unlock(&bo->base.base.gpuva.lock); dma_resv_unlock(drm_gpuvm_resv(vm)); =20 /* If the vm_bo object was destroyed, release the pin reference that @@ -1282,9 +1282,9 @@ static int panthor_vm_prepare_map_op_ctx(struct panth= or_vm_op_ctx *op_ctx, * calling this function. */ dma_resv_lock(panthor_vm_resv(vm), NULL); - mutex_lock(&bo->gpuva_list_lock); + mutex_lock(&bo->base.base.gpuva.lock); op_ctx->map.vm_bo =3D drm_gpuvm_bo_obtain_prealloc(preallocated_vm_bo); - mutex_unlock(&bo->gpuva_list_lock); + mutex_unlock(&bo->base.base.gpuva.lock); dma_resv_unlock(panthor_vm_resv(vm)); =20 /* If the a vm_bo for this combination exists, it already @@ -2036,10 +2036,10 @@ static void panthor_vma_link(struct panthor_vm *vm, { struct panthor_gem_object *bo =3D to_panthor_bo(vma->base.gem.obj); =20 - mutex_lock(&bo->gpuva_list_lock); + mutex_lock(&bo->base.base.gpuva.lock); drm_gpuva_link(&vma->base, vm_bo); drm_WARN_ON(&vm->ptdev->base, drm_gpuvm_bo_put(vm_bo)); - mutex_unlock(&bo->gpuva_list_lock); + mutex_unlock(&bo->base.base.gpuva.lock); } =20 static void panthor_vma_unlink(struct panthor_vm *vm, @@ -2048,9 +2048,9 @@ static void panthor_vma_unlink(struct panthor_vm *vm, struct panthor_gem_object *bo =3D to_panthor_bo(vma->base.gem.obj); struct drm_gpuvm_bo *vm_bo =3D drm_gpuvm_bo_get(vma->base.vm_bo); =20 - mutex_lock(&bo->gpuva_list_lock); + mutex_lock(&bo->base.base.gpuva.lock); drm_gpuva_unlink(&vma->base); - mutex_unlock(&bo->gpuva_list_lock); + mutex_unlock(&bo->base.base.gpuva.lock); =20 /* drm_gpuva_unlink() release the vm_bo, but we manually retained it * when entering this function, so we can implement deferred VMA --=20 2.51.0.261.g7ce5a0a67e-goog