From nobody Mon Feb 9 09:57:46 2026 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) (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 3C5481F4260 for ; Tue, 21 Jan 2025 14:38:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.198 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737470286; cv=none; b=fvbR7RoNOmoca9lHK0iWkfaXrrpeCUjvI450Hub9RUAfZ11abQblEWbj8vAy3S6R7ZKzjLHTAFmm+TOvDwriN8vf8QFQS91wWEUh3DaC72XvWh8/VgxMdH5Azq62ClWjC0rfoOoTX2Cw93WRphWZ6SYLJxUAyvF8WwBy7XcIXbU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737470286; c=relaxed/simple; bh=tLy0ppQooWYGVpXF/b6oB5sVScxG7o0jo9dhHKyatmo=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=MglR/0SqqBxOdUEN6Ti/feZpIO0KJU0lb5OdSjntG3KiQdQgVA/D3T3yTgMGEg0SP8rycMljHmbKtPte6kl4+fBL1dUgcD0jAjlujNXaa+4x49vPQbyaHMapgvIkytBedVw++6b5xznYC8WPriEPc58CK9P4fOurQV/uGdSj8dg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=WKt6LP3a; arc=none smtp.client-ip=217.70.183.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="WKt6LP3a" Received: by mail.gandi.net (Postfix) with ESMTPSA id 8D212C0005; Tue, 21 Jan 2025 14:38:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1737470282; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jrolFzl/cwNj6pBXuV7Ptnquue7F1aAIvgVZ76iIXfo=; b=WKt6LP3a2zyySQQ0IqIxjA5eMLBPpp0RKdq5xuYOYTpW2VKHcMDSQ/2jQmMqgJIjwkemEq YUeEq//sUooVxryzuBPYDgx7yq2vfApoDwlevVoSnSoFwqC/VbfJ8tiM0wwvSxXSy1vhbv iHIRQ9vkoE22UqpcvFfHkHobEXyRmpXHKZp/B7y4KCyzuusMSn8MhkO7WIqWCJHle//7GI N0fKqwUV8TMEcdK2ZdSgLrKkSsFkPV9OE2E8RzXYYK7OB7+FjWA84pc5laatWM1WxC2nfM qnp4hIQQDtWwAtK8v6FLPc1RXEllYAGqPW5bhnHS6t+Q8Bg/PvoWSb8UeNGhRQ== From: Louis Chauvet Date: Tue, 21 Jan 2025 15:34:48 +0100 Subject: [PATCH RFC v3 04/14] drm/vkms: Introduce configfs for plane Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250121-google-config-fs-v3-4-8154a6945142@bootlin.com> References: <20250121-google-config-fs-v3-0-8154a6945142@bootlin.com> In-Reply-To: <20250121-google-config-fs-v3-0-8154a6945142@bootlin.com> To: Rodrigo Siqueira , Melissa Wen , =?utf-8?q?Ma=C3=ADra_Canal?= , Haneen Mohammed , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Simona Vetter Cc: jose.exposito89@gmail.com, dri-devel@lists.freedesktop.org, arthurgrillo@riseup.net, linux-kernel@vger.kernel.org, jeremie.dautheribes@bootlin.com, miquel.raynal@bootlin.com, thomas.petazzoni@bootlin.com, seanpaul@google.com, nicolejadeyee@google.com, Louis Chauvet X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=8211; i=louis.chauvet@bootlin.com; h=from:subject:message-id; bh=tLy0ppQooWYGVpXF/b6oB5sVScxG7o0jo9dhHKyatmo=; b=owEBbQKS/ZANAwAIASCtLsZbECziAcsmYgBnj7FAvgEdt//HFRmy/Fx6KlYu+uMo6LLYN0sbb X8nijZ5Y/6JAjMEAAEIAB0WIQRPj7g/vng8MQxQWQQgrS7GWxAs4gUCZ4+xQAAKCRAgrS7GWxAs 4kFHD/0bCWFnIAwUQaABRhGKVLKGkDuiXppjSi8gsELhcR/YyySTGADV/4cwhVqEIBrqlvieJ9+ oXMccMM1N1662hfJZQW9cmz38T2HU9hPCup5uySp5AqKVr57LAgHXPttEFhwRQG+7bA0f1QHdzP L/SCMZLT6ZxDfmBDEHvxYFbvdPZM6T1lED8uzP6EmpZ3MhXhT6WBZC8wHv+XPoakSo8axv07TbF 67aR16g73ULWCQPWURx/jxbrToHwQZuYq77zl71eIwxO9UjJojOJKlw4wzxjOTUi2yvrbW5WG+X 9A38rveoqnoSatZAYCuxFBHzU2qwF0/qwUnyl7rAQ+hsTyGNEV6opBJlG41CD9t7BZl9w1uIsXk YgtdVhmYPBQgvOuQGoF7UWA4ZzYOLKYNloNfD7N1+OGAWH/ohMXC9cZPrzs3u0Akol2p99Z7a4m REIWgy0Kc2EJji/SZQhiplk/0Gf3hlOY6rlDlrc3tx4cakIKYz+tBdpxFV7CHbIvU4bEC4WNr4v ECgHeGgQv33JRUhU2gXBQPs7JlafIi8304Cz530hzO0l3TCUkjNWlSOOQZleTuUFmRYOs9GMqsV L5HTUn1wHVhH6Eus7y+X4gDBEB9b+4c3UFFH6iqPs16sIKJsnyzImVCmcTy2t1d83V6WW2qZT/h K3h6eGhJxyeZKlw== X-Developer-Key: i=louis.chauvet@bootlin.com; a=openpgp; fpr=8B7104AE9A272D6693F527F2EC1883F55E0B40A5 X-GND-Sasl: louis.chauvet@bootlin.com To allows the userspace to test many hardware configuration, introduce a new interface to create and configure planes. The planes are created by creating a directory in the `planes` directory. The type of plane is configured by writing 0 (Overlay), 1 (primary) or 2 (cursor) in the file `type`. As the CRTCs and encoders can't be configured yet, the planes are all atteched to the same CRTC and encoder. The current interface is: /config/vkms DEVICE_1 =E2=94=A3=E2=94=81 enable =E2=94=A3=E2=94=81 planes =E2=94=83 =E2=94=A3=E2=94=81 PLANE_1 =E2=94=83 =E2=94=83 =E2=94=A3=E2=94=81 type =E2=94=83 =E2=94=A3=E2=94=81 PLANE_2 =E2=94=83 =E2=94=83 =E2=94=97=E2=94=81 type =E2=94=83 =E2=94=97=E2=94=81 PLANE_3 =E2=94=83 =E2=94=97=E2=94=81 type DEVICE_2 =E2=94=97=E2=94=81 ditto Signed-off-by: Louis Chauvet --- drivers/gpu/drm/vkms/vkms_configfs.c | 149 +++++++++++++++++++++++++++++++= +--- drivers/gpu/drm/vkms/vkms_configfs.h | 20 +++++ 2 files changed, 160 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_configfs.c b/drivers/gpu/drm/vkms/vk= ms_configfs.c index 6535672f008401cf1ae008ff2ef74452b2575eab..ee64243396b3e586f76ff067144= 1c172da022421 100644 --- a/drivers/gpu/drm/vkms/vkms_configfs.c +++ b/drivers/gpu/drm/vkms/vkms_configfs.c @@ -10,6 +10,138 @@ #include "vkms_drv.h" #include "vkms_config.h" =20 +static ssize_t plane_type_show(struct config_item *item, char *page) +{ + struct vkms_config_plane *plane; + enum drm_plane_type plane_type; + struct vkms_configfs_device *vkms_configfs =3D plane_item_to_vkms_configf= s_device(item); + + mutex_lock(&vkms_configfs->lock); + plane =3D plane_item_to_vkms_configfs_plane(item)->vkms_config_plane; + plane_type =3D plane->type; + mutex_unlock(&vkms_configfs->lock); + + return sprintf(page, "%u", plane_type); +} + +static ssize_t plane_type_store(struct config_item *item, + const char *page, size_t count) +{ + struct vkms_configfs_device *vkms_configfs =3D plane_item_to_vkms_configf= s_device(item); + enum drm_plane_type val =3D DRM_PLANE_TYPE_OVERLAY; + struct vkms_config_plane *plane; + int ret; + + ret =3D kstrtouint(page, 10, &val); + if (ret) + return ret; + + if (val !=3D DRM_PLANE_TYPE_PRIMARY && val !=3D DRM_PLANE_TYPE_CURSOR && + val !=3D DRM_PLANE_TYPE_OVERLAY) + return -EINVAL; + + mutex_lock(&vkms_configfs->lock); + if (vkms_configfs->enabled) { + mutex_unlock(&vkms_configfs->lock); + return -EINVAL; + } + + plane =3D plane_item_to_vkms_configfs_plane(item)->vkms_config_plane; + plane->type =3D val; + + mutex_unlock(&vkms_configfs->lock); + + return count; +} + +CONFIGFS_ATTR(plane_, type); + +static struct configfs_attribute *plane_attrs[] =3D { + &plane_attr_type, + NULL, +}; + +static void plane_release(struct config_item *item) +{ + struct vkms_configfs_plane *vkms_configfs_plane =3D plane_item_to_vkms_co= nfigfs_plane(item); + + mutex_lock(&vkms_configfs_plane->vkms_configfs_device->lock); + vkms_config_delete_plane(vkms_configfs_plane->vkms_config_plane, + vkms_configfs_plane->vkms_configfs_device->vkms_config); + mutex_unlock(&vkms_configfs_plane->vkms_configfs_device->lock); + + kfree(vkms_configfs_plane); +} + +static struct configfs_item_operations plane_item_operations =3D { + .release =3D plane_release, +}; + +static const struct config_item_type subgroup_plane =3D { + .ct_attrs =3D plane_attrs, + .ct_item_ops =3D &plane_item_operations, + .ct_owner =3D THIS_MODULE, +}; + +static struct config_group *planes_make_group(struct config_group *config_= group, + const char *name) +{ + struct vkms_configfs_device *vkms_configfs; + struct vkms_configfs_plane *vkms_configfs_plane; + + vkms_configfs =3D planes_item_to_vkms_configfs_device(&config_group->cg_i= tem); + vkms_configfs_plane =3D kzalloc(sizeof(*vkms_configfs_plane), GFP_KERNEL); + + if (!vkms_configfs_plane) + return ERR_PTR(-ENOMEM); + + mutex_lock(&vkms_configfs->lock); + + if (vkms_configfs->enabled) { + kfree(vkms_configfs_plane); + mutex_unlock(&vkms_configfs->lock); + return ERR_PTR(-EINVAL); + } + + vkms_configfs_plane->vkms_config_plane =3D vkms_config_create_plane(vkms_= configfs->vkms_config); + + if (list_count_nodes(&vkms_configfs->vkms_config->planes) =3D=3D 1) + vkms_configfs_plane->vkms_config_plane->type =3D DRM_PLANE_TYPE_PRIMARY; + + if (!vkms_configfs_plane->vkms_config_plane || + vkms_config_plane_attach_crtc(vkms_configfs_plane->vkms_config_plane, + vkms_configfs->vkms_config_crtc)) { + kfree(vkms_configfs_plane); + mutex_unlock(&vkms_configfs->lock); + return ERR_PTR(-ENOMEM); + } + + vkms_configfs_plane->vkms_config_plane->name =3D kzalloc(strlen(name) + 1= , GFP_KERNEL); + if (!vkms_configfs_plane->vkms_config_plane->name) { + kfree(vkms_configfs_plane->vkms_config_plane); + kfree(vkms_configfs_plane); + mutex_unlock(&vkms_configfs->lock); + return ERR_PTR(-ENOMEM); + } + strscpy(vkms_configfs_plane->vkms_config_plane->name, name, strlen(name) = + 1); + + config_group_init_type_name(&vkms_configfs_plane->group, name, &subgroup_= plane); + + vkms_configfs_plane->vkms_configfs_device =3D vkms_configfs; + mutex_unlock(&vkms_configfs->lock); + + return &vkms_configfs_plane->group; +} + +static struct configfs_group_operations planes_group_operations =3D { + .make_group =3D &planes_make_group, +}; + +static const struct config_item_type planes_item_type =3D { + .ct_group_ops =3D &planes_group_operations, + .ct_owner =3D THIS_MODULE, +}; + static ssize_t device_enable_show(struct config_item *item, char *page) { return sprintf(page, "%d\n", @@ -92,23 +224,22 @@ static struct config_group *root_make_group(struct con= fig_group *group, return ERR_PTR(-ENOMEM); } =20 - plane =3D vkms_config_create_plane(configfs->vkms_config); - crtc =3D vkms_config_create_crtc(configfs->vkms_config); - encoder =3D vkms_config_create_encoder(configfs->vkms_config); - - if (!plane || !crtc || !encoder || - vkms_config_plane_attach_crtc(plane, crtc) || - vkms_config_encoder_attach_crtc(encoder, crtc)) { + configfs->vkms_config_crtc =3D vkms_config_create_crtc(configfs->vkms_con= fig); + configfs->vkms_config_encoder =3D vkms_config_create_encoder(configfs->vk= ms_config); + if (!configfs->vkms_config_crtc || !configfs->vkms_config_encoder || + vkms_config_encoder_attach_crtc(configfs->vkms_config_encoder, + configfs->vkms_config_crtc)) { vkms_config_destroy(configfs->vkms_config); kfree(configfs); return ERR_PTR(-ENOMEM); } =20 - plane->type =3D DRM_PLANE_TYPE_PRIMARY; - config_group_init_type_name(&configfs->group, name, &device_item_type); =20 + config_group_init_type_name(&configfs->plane_group, "planes", &planes_ite= m_type); + configfs_add_default_group(&configfs->plane_group, &configfs->group); + return &configfs->group; } =20 diff --git a/drivers/gpu/drm/vkms/vkms_configfs.h b/drivers/gpu/drm/vkms/vk= ms_configfs.h index ffacba6607018de44323fb6aa05cc6da8400a9f2..0f3701442691c23e33775fdd072= 701076d3d9387 100644 --- a/drivers/gpu/drm/vkms/vkms_configfs.h +++ b/drivers/gpu/drm/vkms/vkms_configfs.h @@ -19,15 +19,35 @@ struct vkms_configfs_device { struct config_group group; =20 + struct config_group plane_group; + struct mutex lock; bool enabled; =20 struct vkms_config *vkms_config; + struct vkms_config_crtc *vkms_config_crtc; + struct vkms_config_encoder *vkms_config_encoder; +}; + +struct vkms_configfs_plane { + struct config_group group; + + struct vkms_configfs_device *vkms_configfs_device; + struct vkms_config_plane *vkms_config_plane; }; =20 #define config_item_to_vkms_configfs_device(item) \ container_of(to_config_group((item)), struct vkms_configfs_device, group) =20 +#define planes_item_to_vkms_configfs_device(item) \ + config_item_to_vkms_configfs_device((item)->ci_parent) + +#define plane_item_to_vkms_configfs_device(item) \ + planes_item_to_vkms_configfs_device((item)->ci_parent) + +#define plane_item_to_vkms_configfs_plane(item) \ + container_of(to_config_group((item)), struct vkms_configfs_plane, group) + /* ConfigFS Support */ int vkms_init_configfs(void); void vkms_unregister_configfs(void); --=20 2.47.1