From nobody Tue Feb 10 19:01:11 2026 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 80385481A3 for ; Sat, 22 Mar 2025 21:30:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742679005; cv=pass; b=o+RAYdBbyCGrIG8vjAdXxIkd1iMHVUVfKDwbwUtlEVy1YGUvHWoYiWe57lwiIybx4sL2r6zY/ovF2inuUopVMDKAN1AsD8QfnV4FvRa+h5iFlMpEO0uh5MfOu6K3/pM7iW56suUGQvkEPmAFbHIXjqXuAkOONPKBL1uIVmA6afM= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742679005; c=relaxed/simple; bh=IU+2xeAyIoWfDNw1+gmyJoWuDUbWBOrnfPEj/xjdAwA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SVAkSaWDLS6t1aV3FL/c6MHiIvCVqbhrMWC85I18HXKIFdkR986Hj+xfeTHgo3TUEhF/ejlDicv/4IF+k+QXQ+W1OcSyE80/Hw54JvVCdqzROw1aU6Zcc3Aw4N8CQI5nlSqKls84w1abJP+n26I4sg7MNCP1Zk35ax8cyUeTdPg= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=dmitry.osipenko@collabora.com header.b=XZytbpnY; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=dmitry.osipenko@collabora.com header.b="XZytbpnY" ARC-Seal: i=1; a=rsa-sha256; t=1742678984; cv=none; d=zohomail.com; s=zohoarc; b=SSq54ZSfhyVl0NZa6xQbAOU/zjdSvJkBbCCjNiNw888T3tBI1aIkDgu5gbb+PCGrYfwqh7b7w9/wFBjvCHNHWDBaG89Xv9BfVztEX4tR8WUNlm8Joy1iL30E0uq0T+DIz+Z0x5y0Fm0gVCTzVD4C0wCxRQGiUxxx/Yjgt3KGeCE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1742678984; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=LZhuSt1JyOcqupf4blKAAjBgaNXocdvNqctALCAsuBY=; b=EyomSBCuSAbzn0ze5ycGEcm8tqGYzCnxOV6A+a+ZuFkexIbwSmVKrPZkF58Ur4SfTB1IBRTrFtrTd+oMWtvRe8P3pOj8fsvQHKfi+qBFLPyohPv6dt1a6vzG22IhnwM5nqbMPO/cMawjQt47AWVkHSYosOKcIMlRhO5hOgt2l0Q= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=dmitry.osipenko@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1742678984; s=zohomail; d=collabora.com; i=dmitry.osipenko@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=LZhuSt1JyOcqupf4blKAAjBgaNXocdvNqctALCAsuBY=; b=XZytbpnYRD9qONDRZrySEHeLnDdAdOWzgiGkX5Aj1Wzst5Q46dGa7UNjwMWcJI84 i2IyAz1/eA39Q4tSZsP/7huUFIUaqx3zTrx5fgs+/wRLoZcRszkFcTECR0pOxxsNjk0 95u8XDeTiNObK5griP2mfYQSbBI0a6ojrDx0GXWc= Received: by mx.zohomail.com with SMTPS id 1742678980476164.7530987685443; Sat, 22 Mar 2025 14:29:40 -0700 (PDT) From: Dmitry Osipenko To: David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , =?UTF-8?q?Christian=20K=C3=B6nig?= , Gerd Hoffmann , Qiang Yu , Steven Price , Boris Brezillon , Frank Binns , Matt Coster Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel@collabora.com Subject: [PATCH v20 09/10] drm/shmem-helper: Switch drm_gem_shmem_vmap/vunmap to use pin/unpin Date: Sun, 23 Mar 2025 00:26:07 +0300 Message-ID: <20250322212608.40511-10-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250322212608.40511-1-dmitry.osipenko@collabora.com> References: <20250322212608.40511-1-dmitry.osipenko@collabora.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Content-Type: text/plain; charset="utf-8" The vmapped pages shall be pinned in memory and previously get/put_pages() were implicitly hard-pinning/unpinning the pages. This will no longer be the case with addition of memory shrinker because pages_use_count > 0 won't determine anymore whether pages are hard-pinned (they will be soft-pinned), while the new pages_pin_count will do the hard-pinning. Switch the vmap/vunmap() to use pin/unpin() functions in a preparation of addition of the memory shrinker support to drm-shmem. Acked-by: Maxime Ripard Reviewed-by: Boris Brezillon Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem_shmem_helper.c | 6 +++--- include/drm/drm_gem_shmem_helper.h | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_g= em_shmem_helper.c index 6fb96e790abd..84a196bbe44f 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -360,7 +360,7 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_obje= ct *shmem, return 0; } =20 - ret =3D drm_gem_shmem_get_pages_locked(shmem); + ret =3D drm_gem_shmem_pin_locked(shmem); if (ret) goto err_zero_use; =20 @@ -383,7 +383,7 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_obje= ct *shmem, =20 err_put_pages: if (!drm_gem_is_imported(obj)) - drm_gem_shmem_put_pages_locked(shmem); + drm_gem_shmem_unpin_locked(shmem); err_zero_use: shmem->vmap_use_count =3D 0; =20 @@ -420,7 +420,7 @@ void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_o= bject *shmem, return; =20 vunmap(shmem->vaddr); - drm_gem_shmem_put_pages_locked(shmem); + drm_gem_shmem_unpin_locked(shmem); } =20 shmem->vaddr =3D NULL; diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem= _helper.h index 3a4be433d5f0..8b9bba87ae63 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -130,7 +130,7 @@ int drm_gem_shmem_madvise_locked(struct drm_gem_shmem_o= bject *shmem, int madv); static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object = *shmem) { return (shmem->madv > 0) && - !shmem->vmap_use_count && shmem->sgt && + !refcount_read(&shmem->pages_pin_count) && shmem->sgt && !shmem->base.dma_buf && !drm_gem_is_imported(&shmem->base); } =20 --=20 2.49.0