From patchwork Tue Mar 18 21:22:51 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 3849531 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0646EBF540 for ; Tue, 18 Mar 2014 21:23:57 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DC7732038F for ; Tue, 18 Mar 2014 21:23:55 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id B97152038E for ; Tue, 18 Mar 2014 21:23:54 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D297B6F93C; Tue, 18 Mar 2014 14:23:53 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-qa0-f48.google.com (mail-qa0-f48.google.com [209.85.216.48]) by gabe.freedesktop.org (Postfix) with ESMTP id C64F36F93C for ; Tue, 18 Mar 2014 14:23:52 -0700 (PDT) Received: by mail-qa0-f48.google.com with SMTP id m5so7565282qaj.21 for ; Tue, 18 Mar 2014 14:23:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=XruKwmv7hiuwrfO178iHfOs2nyLiLF5DoEppnkQyUV8=; b=F5L+fYicIUwVL61zmNGetR4hWMx+HMftl9NeQp+j/vATbVsQYUPFoDbb9vIXadlyX6 pgruidBCZ1s0GW2sBthnjtML2JCjg9UNU64l72u1vNZT96fK9NScD242eo8n50l/cYti kLj15rVw6KZRA0Yjkg709It0yFU1CfWCVVm08IwaVwYI+1y02lYoMIpVcm2jSt1QSShY N7puqQZkfwVSEsc9FltGSbFZwJ56s7iWLL3+5AwATrM/6NbKEtalfmZRm8XKBcUARBuC GqGva9wNJlXnpxO27qtpq0cePEKx8ggWYD+H54WGwyiJwm6E3e7s5wltUHvJeFWTF5h8 4/hQ== X-Received: by 10.224.137.66 with SMTP id v2mr4733841qat.104.1395177832228; Tue, 18 Mar 2014 14:23:52 -0700 (PDT) Received: from localhost (pool-108-20-254-15.bstnma.east.verizon.net. [108.20.254.15]) by mx.google.com with ESMTPSA id z96sm7150668qge.10.2014.03.18.14.23.50 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Mar 2014 14:23:51 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org Subject: [PATCH 14/16] drm: Atomic modeset ioctl Date: Tue, 18 Mar 2014 17:22:51 -0400 Message-Id: <1395177773-800-15-git-send-email-robdclark@gmail.com> X-Mailer: git-send-email 1.8.5.3 In-Reply-To: <1395177773-800-1-git-send-email-robdclark@gmail.com> References: <1395177773-800-1-git-send-email-robdclark@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ville Syrjälä The atomic modeset ioctl cna be used to push any number of new values for object properties. The driver can then check the full device configuration as single unit, and try to apply the changes atomically. The ioctl simply takes a list of object IDs and property IDs and their values. For setting values to blob properties, the property value indicates the length of the data, and the actual data is passed via another blob pointer. The caller can demand non-blocking operation from the ioctl, and if the driver can't satisfy that requirement an error will be returned. The caller can also request to receive asynchronous completion events after the operation has reached the hardware. An event is sent for each object specified by the caller, whether or not the actual state of that object changed. Each event also carries a framebuffer ID, which indicates to user space that the specified object is no longer accessing that framebuffer. Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/drm_crtc.c | 156 ++++++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/drm_drv.c | 1 + include/drm/drmP.h | 6 ++ include/drm/drm_crtc.h | 2 + include/uapi/drm/drm.h | 12 ++++ include/uapi/drm/drm_mode.h | 20 ++++++ 6 files changed, 197 insertions(+) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index e5bcee7..9f2db6c 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -4877,3 +4877,159 @@ void drm_mode_config_cleanup(struct drm_device *dev) idr_destroy(&dev->mode_config.crtc_idr); } EXPORT_SYMBOL(drm_mode_config_cleanup); + +int drm_mode_atomic_ioctl(struct drm_device *dev, + void *data, struct drm_file *file_priv) +{ + struct drm_mode_atomic *arg = data; + uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr); + uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr); + uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); + uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr); + uint64_t __user *blob_values_ptr = (uint64_t __user *)(unsigned long)(arg->blob_values_ptr); + unsigned int copied_objs, copied_props, copied_blobs; + void *state; + int ret = 0; + unsigned int i, j; + + if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS) + return -EINVAL; + + /* can't test and expect an event at the same time. */ + if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) && + (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) + return -EINVAL; + +retry: + copied_objs = 0; + copied_props = 0; + copied_blobs = 0; + + state = dev->driver->atomic_begin(dev, arg->flags); + if (IS_ERR(state)) { + ret = PTR_ERR(state); + goto out; + } + + for (i = 0; i < arg->count_objs; i++) { + uint32_t obj_id, count_props; + struct drm_mode_object *obj; + + if (get_user(obj_id, objs_ptr + copied_objs)) { + ret = -EFAULT; + goto out; + } + + obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY); + if (!obj || !obj->properties) { + ret = -ENOENT; + goto out; + } + + if ((obj->type == DRM_MODE_OBJECT_CRTC) && + (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) { + struct drm_pending_vblank_event *e = + create_vblank_event(dev, file_priv, arg->user_data); + if (!e) { + ret = -ENOMEM; + goto out; + } + ret = dev->driver->atomic_set_event(dev, state, obj, e); + if (ret) { + destroy_vblank_event(dev, file_priv, e); + goto out; + } + } + + if (get_user(count_props, count_props_ptr + copied_objs)) { + ret = -EFAULT; + goto out; + } + + copied_objs++; + + for (j = 0; j < count_props; j++) { + uint32_t prop_id; + uint64_t prop_value; + struct drm_property *prop; + void *blob_data = NULL; + + if (get_user(prop_id, props_ptr + copied_props)) { + ret = -EFAULT; + goto out; + } + + if (!object_has_prop(obj, prop_id)) { + ret = -EINVAL; + goto out; + } + + prop = drm_property_find(dev, prop_id); + if (!prop) { + ret = -ENOENT; + goto out; + } + + if (get_user(prop_value, prop_values_ptr + copied_props)) { + ret = -EFAULT; + goto out; + } + + if (!drm_property_change_is_valid(prop, prop_value)) { + ret = -EINVAL; + goto out; + } + + if ((prop->flags & DRM_MODE_PROP_BLOB) && prop_value) { + uint64_t blob_ptr; + + if (get_user(blob_ptr, blob_values_ptr + copied_blobs)) { + ret = -EFAULT; + goto out; + } + + blob_data = kmalloc(prop_value, GFP_KERNEL); + if (!blob_data) { + ret = -ENOMEM; + goto out; + } + + if (copy_from_user(blob_data, (void __user *)(unsigned long)blob_ptr, prop_value)) { + kfree(blob_data); + ret = -EFAULT; + goto out; + } + } + + /* User space sends the blob pointer even if we + * don't use it (length==0). + */ + if (prop->flags & DRM_MODE_PROP_BLOB) + copied_blobs++; + + /* The driver will be in charge of blob_data from now on. */ + ret = drm_mode_set_obj_prop(obj, state, prop, + prop_value, blob_data); + if (ret) + goto out; + + copied_props++; + } + } + + ret = dev->driver->atomic_check(dev, state); + if (ret) + goto out; + + if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) + goto out; + + ret = dev->driver->atomic_commit(dev, state); + + out: + dev->driver->atomic_end(dev, state); + if (ret == -EDEADLK) + goto retry; + + return ret; +} diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 345be03..8703651 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -167,6 +167,7 @@ static const struct drm_ioctl_desc drm_ioctls[] = { DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), + DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), }; #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 2f72875..0bf4e67 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -1171,6 +1171,12 @@ struct drm_vblank_crtc { once per disable */ }; +struct drm_pending_atomic_event { + struct drm_pending_event base; + int pipe; + struct drm_event_atomic event; +}; + /** * DRM device structure. This structure represent a complete card that * may contain multiple heads. diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 88d8117..ba34c70 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1517,6 +1517,8 @@ extern int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); extern int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +extern int drm_mode_atomic_ioctl(struct drm_device *dev, + void *data, struct drm_file *file_priv); extern void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, int *bpp); diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 6e4952b..eabc071 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -768,6 +768,7 @@ struct drm_prime_handle { #define DRM_IOCTL_MODE_OBJ_GETPROPERTIES DRM_IOWR(0xB9, struct drm_mode_obj_get_properties) #define DRM_IOCTL_MODE_OBJ_SETPROPERTY DRM_IOWR(0xBA, struct drm_mode_obj_set_property) #define DRM_IOCTL_MODE_CURSOR2 DRM_IOWR(0xBB, struct drm_mode_cursor2) +#define DRM_IOCTL_MODE_ATOMIC DRM_IOWR(0xBC, struct drm_mode_atomic) /** * Device specific ioctls should only be in their respective headers @@ -809,6 +810,17 @@ struct drm_event_vblank { __u32 reserved; }; +struct drm_event_atomic { + struct drm_event base; + __u64 user_data; + __u32 tv_sec; + __u32 tv_usec; + __u32 sequence; + __u32 obj_id; + __u32 old_fb_id; + __u32 reserved; +}; + /* typedef area */ #ifndef __KERNEL__ typedef struct drm_clip_rect drm_clip_rect_t; diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index 6421edc..a4b2e58 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -511,7 +511,27 @@ struct drm_mode_destroy_dumb { uint32_t handle; }; +/* page-flip flags are valid, plus: */ +#define DRM_MODE_ATOMIC_TEST_ONLY 0x0100 #define DRM_MODE_ATOMIC_NONBLOCK 0x0200 #define DRM_MODE_ATOMIC_NOLOCK 0x8000 /* only used internally */ +#define DRM_MODE_ATOMIC_FLAGS (\ + DRM_MODE_PAGE_FLIP_EVENT |\ + DRM_MODE_PAGE_FLIP_ASYNC |\ + DRM_MODE_ATOMIC_TEST_ONLY |\ + DRM_MODE_ATOMIC_NONBLOCK) + +/* FIXME come up with some sane error reporting mechanism? */ +struct drm_mode_atomic { + __u32 flags; + __u32 count_objs; + __u64 objs_ptr; + __u64 count_props_ptr; + __u64 props_ptr; + __u64 prop_values_ptr; + __u64 blob_values_ptr; + __u64 user_data; +}; + #endif