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[104.199.175.148]) by smtp.gmail.com with ESMTPSA id jh12-20020a170903328c00b001bf5c12e9fesm6676568plb.125.2023.08.28.01.16.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Aug 2023 01:16:34 -0700 (PDT) From: Brandon Pollack To: marius.vlad@collabora.com, jshargo@chromium.org Subject: [PATCH v5 5/7] drm/vkms: Support enabling ConfigFS devices Date: Mon, 28 Aug 2023 08:14:47 +0000 Message-ID: <20230828081609.3572937-6-brpol@chromium.org> X-Mailer: git-send-email 2.42.0.rc1.204.g551eb34607-goog In-Reply-To: <20230828081609.3572937-1-brpol@chromium.org> References: <20230828081609.3572937-1-brpol@chromium.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: hamohammed.sa@gmail.com, rodrigosiqueiramelo@gmail.com, linux-doc@vger.kernel.org, hirono@chromium.org, mduggan@chromium.org, corbet@lwn.net, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, melissa.srw@gmail.com, mairacanal@riseup.net, mripard@kernel.org, tzimmermann@suse.de, Brandon Pollack Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Jim Shargo VKMS now supports creating and using virtual devices! In addition to the enabling logic, this commit also prevents users from adding new objects once a card is registered. Signed-off-by: Jim Shargo Signed-off-by: Brandon Pollack --- drivers/gpu/drm/vkms/vkms_configfs.c | 37 ++-- drivers/gpu/drm/vkms/vkms_crtc.c | 4 +- drivers/gpu/drm/vkms/vkms_drv.c | 1 + drivers/gpu/drm/vkms/vkms_drv.h | 4 +- drivers/gpu/drm/vkms/vkms_output.c | 283 +++++++++++++++++++++++---- drivers/gpu/drm/vkms/vkms_plane.c | 10 +- 6 files changed, 283 insertions(+), 56 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_configfs.c b/drivers/gpu/drm/vkms/vkms_configfs.c index f2439629b37b..c28fa87c196e 100644 --- a/drivers/gpu/drm/vkms/vkms_configfs.c +++ b/drivers/gpu/drm/vkms/vkms_configfs.c @@ -506,29 +506,40 @@ static ssize_t device_enabled_store(struct config_item *item, const char *buf, { struct vkms_configfs *configfs = item_to_configfs(item); struct vkms_device *device; - int value, ret; + int enabled, ret; - ret = kstrtoint(buf, 0, &value); + ret = kstrtoint(buf, 0, &enabled); if (ret) return ret; - if (value != 1) - return -EINVAL; - - mutex_lock(&configfs->lock); - - if (configfs->vkms_device) { + if (enabled == 0) { + mutex_lock(&configfs->lock); + if (configfs->vkms_device) { + vkms_remove_device(configfs->vkms_device); + configfs->vkms_device = NULL; + } mutex_unlock(&configfs->lock); + return len; } - device = vkms_add_device(configfs); - mutex_unlock(&configfs->lock); + if (enabled == 1) { + mutex_lock(&configfs->lock); + if (!configfs->vkms_device) { + device = vkms_add_device(configfs); + if (IS_ERR(device)) { + mutex_unlock(&configfs->lock); + return -PTR_ERR(device); + } + + configfs->vkms_device = device; + } + mutex_unlock(&configfs->lock); - if (IS_ERR(device)) - return -PTR_ERR(device); + return len; + } - return len; + return -EINVAL; } CONFIGFS_ATTR(device_, enabled); diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c index 74bbd675464b..2aa1c5246b7e 100644 --- a/drivers/gpu/drm/vkms/vkms_crtc.c +++ b/drivers/gpu/drm/vkms/vkms_crtc.c @@ -279,7 +279,7 @@ static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = { struct vkms_crtc *vkms_crtc_init(struct vkms_device *vkmsdev, struct drm_plane *primary, - struct drm_plane *cursor) + struct drm_plane *cursor, const char *name) { struct drm_device *dev = &vkmsdev->drm; struct vkms_crtc *vkms_crtc; @@ -291,7 +291,7 @@ struct vkms_crtc *vkms_crtc_init(struct vkms_device *vkmsdev, vkms_crtc = &vkmsdev->output.crtcs[vkmsdev->output.num_crtcs++]; ret = drmm_crtc_init_with_planes(dev, &vkms_crtc->base, primary, cursor, - &vkms_crtc_funcs, NULL); + &vkms_crtc_funcs, name); if (ret) { DRM_ERROR("Failed to init CRTC\n"); goto out_error; diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c index 819e880a8cf7..6e7f20681890 100644 --- a/drivers/gpu/drm/vkms/vkms_drv.c +++ b/drivers/gpu/drm/vkms/vkms_drv.c @@ -275,6 +275,7 @@ struct vkms_device *vkms_add_device(struct vkms_configfs *configfs) dev, &vkms_platform_driver.driver))) { pdev = to_platform_device(dev); max_id = max(max_id, pdev->id); + put_device(dev); } pdev = platform_device_register_data(NULL, DRIVER_NAME, max_id + 1, diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h index 8cdd7949f661..2b9545ada9c2 100644 --- a/drivers/gpu/drm/vkms/vkms_drv.h +++ b/drivers/gpu/drm/vkms/vkms_drv.h @@ -250,13 +250,13 @@ void vkms_remove_device(struct vkms_device *vkms_device); /* CRTC */ struct vkms_crtc *vkms_crtc_init(struct vkms_device *vkmsdev, struct drm_plane *primary, - struct drm_plane *cursor); + struct drm_plane *cursor, const char *name); int vkms_output_init(struct vkms_device *vkmsdev); int vkms_output_init_default(struct vkms_device *vkmsdev); struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, - enum drm_plane_type type); + enum drm_plane_type type, char* name, ...); /* CRC Support */ const char *const *vkms_get_crc_sources(struct drm_crtc *crtc, diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c index dc69959c5e1d..883862e2c5f2 100644 --- a/drivers/gpu/drm/vkms/vkms_output.c +++ b/drivers/gpu/drm/vkms/vkms_output.c @@ -2,8 +2,10 @@ #include #include +#include #include #include +#include #include #include @@ -60,7 +62,8 @@ vkms_connector_init(struct vkms_device *vkms_device) return connector; } -static struct drm_encoder *vkms_encoder_init(struct vkms_device *vkms_device) +static struct drm_encoder *vkms_encoder_init(struct vkms_device *vkms_device, + char *name) { struct drm_encoder *encoder; int ret; @@ -71,7 +74,7 @@ static struct drm_encoder *vkms_encoder_init(struct vkms_device *vkms_device) encoder = &vkms_device->output .encoders[vkms_device->output.num_encoders++]; ret = drm_encoder_init(&vkms_device->drm, encoder, &vkms_encoder_funcs, - DRM_MODE_ENCODER_VIRTUAL, NULL); + DRM_MODE_ENCODER_VIRTUAL, name); if (ret) { memset(encoder, 0, sizeof(*encoder)); vkms_device->output.num_encoders -= 1; @@ -82,7 +85,6 @@ static struct drm_encoder *vkms_encoder_init(struct vkms_device *vkms_device) int vkms_output_init_default(struct vkms_device *vkmsdev) { - struct vkms_output *output = &vkmsdev->output; struct drm_device *dev = &vkmsdev->drm; struct drm_connector *connector; struct drm_encoder *encoder; @@ -92,35 +94,34 @@ int vkms_output_init_default(struct vkms_device *vkmsdev) int writeback; unsigned int n; - primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY); + primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, + "default-primary-plane"); if (IS_ERR(primary)) return PTR_ERR(primary); if (vkmsdev->config.overlay) { for (n = 0; n < NUM_OVERLAY_PLANES; n++) { - struct vkms_plane *overlay = vkms_plane_init( - vkmsdev, DRM_PLANE_TYPE_OVERLAY); - if (IS_ERR(overlay)) { - ret = PTR_ERR(overlay); - goto err_planes; - } + struct vkms_plane *overlay = + vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, + "default-overlay-plane-%d", n); + if (IS_ERR(overlay)) + return PTR_ERR(overlay); } } if (vkmsdev->config.cursor) { - cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR); - if (IS_ERR(cursor)) { - ret = PTR_ERR(cursor); - goto err_planes; - } + cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, + "default-cursor-plane"); + if (IS_ERR(cursor)) + return PTR_ERR(cursor); } vkms_crtc = vkms_crtc_init(vkmsdev, &primary->base, - cursor ? &cursor->base : NULL); + cursor ? &cursor->base : NULL, + "crtc-default"); if (IS_ERR(vkms_crtc)) { DRM_ERROR("Failed to init crtc\n"); - ret = PTR_ERR(vkms_crtc); - goto err_planes; + return PTR_ERR(vkms_crtc); } for (int i = 0; i < vkmsdev->output.num_planes; i++) { @@ -131,22 +132,20 @@ int vkms_output_init_default(struct vkms_device *vkmsdev) connector = vkms_connector_init(vkmsdev); if (IS_ERR(connector)) { DRM_ERROR("Failed to init connector\n"); - ret = PTR_ERR(connector); - goto err_connector; + return PTR_ERR(connector); } - encoder = vkms_encoder_init(vkmsdev); + encoder = vkms_encoder_init(vkmsdev, "encoder-default"); if (IS_ERR(encoder)) { DRM_ERROR("Failed to init encoder\n"); - ret = PTR_ERR(encoder); - goto err_encoder; + return PTR_ERR(encoder); } encoder->possible_crtcs |= drm_crtc_mask(&vkms_crtc->base); ret = drm_connector_attach_encoder(connector, encoder); if (ret) { DRM_ERROR("Failed to attach connector to encoder\n"); - goto err_attach; + return ret; } if (vkmsdev->config.writeback) { @@ -158,26 +157,236 @@ int vkms_output_init_default(struct vkms_device *vkmsdev) drm_mode_config_reset(dev); return 0; +} -err_attach: - drm_encoder_cleanup(encoder); - -err_encoder: - drm_connector_cleanup(connector); +static bool is_object_linked(struct vkms_config_links *links, unsigned long idx) +{ + return links->linked_object_bitmap & (1 << idx); +} -err_connector: - drm_crtc_cleanup(&vkms_crtc->base); +/** +* validate_vkms_configfs_no_dangling_objects - warn on unused objects in vkms +* configfs. +* @vkmsdev vkms device +* +* This gives slightly more visible warning messaging to the user before the drm +* system finds the configuration invalid and prints it's debug information. In +* this case the user may have accidentally not included some links, or the user +* could be testing this faulty configuration. +* +*/ +static void +validate_vkms_configfs_no_dangling_objects(struct vkms_device *vkmsdev) +{ + struct vkms_configfs *configfs = vkmsdev->configfs; + struct config_item *item; + + // 1. Planes + list_for_each_entry(item, &configfs->planes_group.cg_children, + ci_entry) { + struct vkms_config_plane *config_plane = + item_to_config_plane(item); + if (config_plane->possible_crtcs.linked_object_bitmap == 0) + DRM_WARN( + "Vkms configfs created plane %s has no linked crtcs", + item->ci_name); + } -err_planes: - for (int i = 0; i < output->num_planes; i++) - drm_plane_cleanup(&output->planes[i].base); + // 2. connectors + list_for_each_entry(item, &configfs->connectors_group.cg_children, + ci_entry) { + struct vkms_config_connector *config_connector = + item_to_config_connector(item); + if (config_connector->possible_encoders.linked_object_bitmap == + 0) { + DRM_WARN( + "Vkms configfs created connector %s has no linked encoders", + item->ci_name); + } + } - memset(output, 0, sizeof(*output)); + // 3. encoders + list_for_each_entry(item, &configfs->encoders_group.cg_children, + ci_entry) { + struct vkms_config_encoder *config_encoder = + item_to_config_encoder(item); + if (config_encoder->possible_crtcs.linked_object_bitmap == 0) { + DRM_WARN( + "Vkms configfs created encoder %s has no linked crtcs", + item->ci_name); + } + } - return ret; + // 4. crtcs only require a primary plane to function, this is checked during + // output initialization and returns an error. } int vkms_output_init(struct vkms_device *vkmsdev) { - return -EOPNOTSUPP; + struct drm_device *dev = &vkmsdev->drm; + struct vkms_configfs *configfs = vkmsdev->configfs; + struct vkms_output *output = &vkmsdev->output; + struct plane_map { + struct vkms_config_plane *config_plane; + struct vkms_plane *plane; + } plane_map[VKMS_MAX_PLANES] = { 0 }; + struct encoder_map { + struct vkms_config_encoder *config_encoder; + struct drm_encoder *encoder; + } encoder_map[VKMS_MAX_OUTPUT_OBJECTS] = { 0 }; + struct config_item *item; + int map_idx = 0; + + // Ensure configfs has no unused objects, and warn if so. + validate_vkms_configfs_no_dangling_objects(vkmsdev); + + list_for_each_entry(item, &configfs->planes_group.cg_children, + ci_entry) { + struct vkms_config_plane *config_plane = + item_to_config_plane(item); + struct vkms_plane *plane = vkms_plane_init( + vkmsdev, config_plane->type, item->ci_name); + + if (IS_ERR(plane)) { + DRM_ERROR("Unable to init plane from config: %s", + item->ci_name); + return PTR_ERR(plane); + } + + plane_map[map_idx].config_plane = config_plane; + plane_map[map_idx].plane = plane; + map_idx += 1; + } + + map_idx = 0; + list_for_each_entry(item, &configfs->encoders_group.cg_children, + ci_entry) { + struct vkms_config_encoder *config_encoder = + item_to_config_encoder(item); + struct drm_encoder *encoder = + vkms_encoder_init(vkmsdev, item->ci_name); + + if (IS_ERR(encoder)) { + DRM_ERROR("Failed to init config encoder: %s", + item->ci_name); + return PTR_ERR(encoder); + } + encoder_map[map_idx].config_encoder = config_encoder; + encoder_map[map_idx].encoder = encoder; + map_idx += 1; + } + + list_for_each_entry(item, &configfs->connectors_group.cg_children, + ci_entry) { + struct vkms_config_connector *config_connector = + item_to_config_connector(item); + struct drm_connector *connector = vkms_connector_init(vkmsdev); + + if (IS_ERR(connector)) { + DRM_ERROR("Failed to init connector from config: %s", + item->ci_name); + return PTR_ERR(connector); + } + + for (int j = 0; j < output->num_encoders; j++) { + struct encoder_map *encoder = &encoder_map[j]; + + if (is_object_linked( + &config_connector->possible_encoders, + encoder->config_encoder + ->encoder_config_idx)) { + drm_connector_attach_encoder(connector, + encoder->encoder); + } + } + } + + list_for_each_entry(item, &configfs->crtcs_group.cg_children, + ci_entry) { + struct vkms_config_crtc *config_crtc = + item_to_config_crtc(item); + struct vkms_crtc *vkms_crtc; + struct drm_plane *primary = NULL, *cursor = NULL; + + for (int j = 0; j < output->num_planes; j++) { + struct plane_map *plane_entry = &plane_map[j]; + struct drm_plane *plane = &plane_entry->plane->base; + + if (!is_object_linked( + &plane_entry->config_plane->possible_crtcs, + config_crtc->crtc_config_idx)) { + continue; + } + + if (plane->type == DRM_PLANE_TYPE_PRIMARY) { + if (primary) { + DRM_WARN( + "Too many primary planes found for crtc %s.", + item->ci_name); + return -EINVAL; + } + primary = plane; + } else if (plane->type == DRM_PLANE_TYPE_CURSOR) { + if (cursor) { + DRM_WARN( + "Too many cursor planes found for crtc %s.", + item->ci_name); + return -EINVAL; + } + cursor = plane; + } + } + + if (!primary) { + DRM_WARN("No primary plane configured for crtc %s", + item->ci_name); + return -EINVAL; + } + + vkms_crtc = + vkms_crtc_init(vkmsdev, primary, cursor, item->ci_name); + if (IS_ERR(vkms_crtc)) { + DRM_WARN("Unable to init crtc from config: %s", + item->ci_name); + return PTR_ERR(vkms_crtc); + } + + for (int j = 0; j < output->num_planes; j++) { + struct plane_map *plane_entry = &plane_map[j]; + + if (!plane_entry->plane) + break; + + if (is_object_linked( + &plane_entry->config_plane->possible_crtcs, + config_crtc->crtc_config_idx)) { + plane_entry->plane->base.possible_crtcs |= + drm_crtc_mask(&vkms_crtc->base); + } + } + + for (int j = 0; j < output->num_encoders; j++) { + struct encoder_map *encoder_entry = &encoder_map[j]; + + if (is_object_linked(&encoder_entry->config_encoder + ->possible_crtcs, + config_crtc->crtc_config_idx)) { + encoder_entry->encoder->possible_crtcs |= + drm_crtc_mask(&vkms_crtc->base); + } + } + + if (vkmsdev->config.writeback) { + int ret = vkms_enable_writeback_connector(vkmsdev, + vkms_crtc); + if (ret) + DRM_WARN( + "Failed to init writeback connector for config crtc: %s. Error code %d", + item->ci_name, ret); + } + } + + drm_mode_config_reset(dev); + + return 0; } diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c index 950e6c930273..3198bf0dca73 100644 --- a/drivers/gpu/drm/vkms/vkms_plane.c +++ b/drivers/gpu/drm/vkms/vkms_plane.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0+ #include +#include #include #include @@ -215,20 +216,25 @@ static const struct drm_plane_helper_funcs vkms_plane_helper_funcs = { }; struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, - enum drm_plane_type type) + enum drm_plane_type type, char *name, ...) { struct drm_device *dev = &vkmsdev->drm; struct vkms_output *output = &vkmsdev->output; struct vkms_plane *plane; + va_list va; int ret; if (output->num_planes >= VKMS_MAX_PLANES) return ERR_PTR(-ENOMEM); plane = &output->planes[output->num_planes++]; + + va_start(va, name); ret = drm_universal_plane_init(dev, &plane->base, 0, &vkms_plane_funcs, vkms_formats, ARRAY_SIZE(vkms_formats), - NULL, type, NULL); + NULL, type, name, va); + va_end(va); + if (ret) return ERR_PTR(ret);