From patchwork Tue Jun 14 04:54:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880416 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7536FCCA47E for ; Tue, 14 Jun 2022 04:54:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240057AbiFNEyr (ORCPT ); Tue, 14 Jun 2022 00:54:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234577AbiFNEyp (ORCPT ); Tue, 14 Jun 2022 00:54:45 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA0E437BD3; Mon, 13 Jun 2022 21:54:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=0nWwvpLwY71FCZMDrY73Hq3quadFqWPx9640HmGvd+Q=; b=hxEnpCyBGtfcSQxEoMhphGtcQo hj1yRWefeKlJtNas8IVPUPKpF7S3E4v/tiC3AovGaitVoA6L6yEOI/GdOBym9/X0G5n91H5kIJQzd v4oTu2xLZhpa3YZdlJW5rlgDlUR4ASm25Qqn+eAYoZkxUBNoZQklaS/30MAvsddth4PuuFgwSS1ia L+T5BuiBMsu3rQkdqK7JQMtXM8roqLUYqe9lRNIGg8Y/vncJnyjA5IKGfmMQdlt1KgG0sk30hJqS0 rlHZFWs7+7WIzmGoJ0nj11NtdY3nt6QMk8oL6H7vGdGmKDEqN0z2PJLiAO0VMnznqArCx010LQph0 s9QcYw1w==; Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZU-0072e1-UH; Tue, 14 Jun 2022 04:54:33 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org Subject: [PATCH 01/13] vfio/mdev: make mdev.h standalone includable Date: Tue, 14 Jun 2022 06:54:16 +0200 Message-Id: <20220614045428.278494-2-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Include and so that users of this headers don't need to do that and remove those includes that aren't needed any more. Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe --- drivers/gpu/drm/i915/gvt/kvmgt.c | 2 -- drivers/s390/cio/vfio_ccw_drv.c | 2 -- drivers/s390/crypto/vfio_ap_private.h | 1 - drivers/vfio/mdev/mdev_core.c | 2 -- drivers/vfio/mdev/mdev_driver.c | 1 - drivers/vfio/mdev/mdev_sysfs.c | 2 -- include/linux/mdev.h | 3 +++ samples/vfio-mdev/mbochs.c | 1 - samples/vfio-mdev/mdpy.c | 1 - samples/vfio-mdev/mtty.c | 2 -- 10 files changed, 3 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index e2f6c56ab3420..50c0081c4f0d5 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -34,7 +34,6 @@ */ #include -#include #include #include #include @@ -43,7 +42,6 @@ #include #include #include -#include #include #include diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c index ee182cfb467d1..750d0315f1f5b 100644 --- a/drivers/s390/cio/vfio_ccw_drv.c +++ b/drivers/s390/cio/vfio_ccw_drv.c @@ -12,9 +12,7 @@ #include #include -#include #include -#include #include #include diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index a26efd804d0df..6616aa83347ad 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -13,7 +13,6 @@ #define _VFIO_AP_PRIVATE_H_ #include -#include #include #include #include diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index b8b9e7911e559..2c32923fbad27 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -8,9 +8,7 @@ */ #include -#include #include -#include #include #include diff --git a/drivers/vfio/mdev/mdev_driver.c b/drivers/vfio/mdev/mdev_driver.c index 9c2af59809e2e..7bd4bb9850e81 100644 --- a/drivers/vfio/mdev/mdev_driver.c +++ b/drivers/vfio/mdev/mdev_driver.c @@ -7,7 +7,6 @@ * Kirti Wankhede */ -#include #include #include diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index 0ccfeb3dda245..4bfbf49aaa66a 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -9,9 +9,7 @@ #include #include -#include #include -#include #include #include "mdev_private.h" diff --git a/include/linux/mdev.h b/include/linux/mdev.h index bb539794f54a8..555c1d015b5f0 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -10,6 +10,9 @@ #ifndef MDEV_H #define MDEV_H +#include +#include + struct mdev_type; struct mdev_device { diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index 344c2901a82bf..d0d1bb7747240 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -21,7 +21,6 @@ */ #include #include -#include #include #include #include diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index e8c46eb2e2468..0c4ca1f4be7ed 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -17,7 +17,6 @@ */ #include #include -#include #include #include #include diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index f42a59ed2e3fe..4f5a6f2d3629d 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -12,7 +12,6 @@ #include #include -#include #include #include #include @@ -20,7 +19,6 @@ #include #include #include -#include #include #include #include From patchwork Tue Jun 14 04:54:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880417 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DDA95CCA480 for ; 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Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZX-0072eP-HO; Tue, 14 Jun 2022 04:54:36 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org Subject: [PATCH 02/13] vfio/mdev: embedd struct mdev_parent in the parent data structure Date: Tue, 14 Jun 2022 06:54:17 +0200 Message-Id: <20220614045428.278494-3-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Simplify mdev_{un}register_device by requiring the caller to pass in a structure allocate as part of the parent device structure. This removes the need for a list of parents and the separate mdev_parent refcount as we can simplify rely on the reference to the parent device. Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe --- .../driver-api/vfio-mediated-device.rst | 12 +- Documentation/s390/vfio-ap.rst | 2 +- Documentation/s390/vfio-ccw.rst | 2 +- drivers/gpu/drm/i915/gvt/gvt.h | 2 + drivers/gpu/drm/i915/gvt/kvmgt.c | 5 +- drivers/s390/cio/cio.h | 2 + drivers/s390/cio/vfio_ccw_ops.c | 6 +- drivers/s390/crypto/vfio_ap_ops.c | 5 +- drivers/s390/crypto/vfio_ap_private.h | 1 + drivers/vfio/mdev/mdev_core.c | 116 +++--------------- drivers/vfio/mdev/mdev_private.h | 23 ---- drivers/vfio/mdev/mdev_sysfs.c | 4 +- include/linux/mdev.h | 15 ++- samples/vfio-mdev/mbochs.c | 5 +- samples/vfio-mdev/mdpy.c | 5 +- samples/vfio-mdev/mtty.c | 6 +- 16 files changed, 65 insertions(+), 146 deletions(-) diff --git a/Documentation/driver-api/vfio-mediated-device.rst b/Documentation/driver-api/vfio-mediated-device.rst index eded8719180fb..3749f59c855fa 100644 --- a/Documentation/driver-api/vfio-mediated-device.rst +++ b/Documentation/driver-api/vfio-mediated-device.rst @@ -60,19 +60,19 @@ devices as examples, as these devices are the first devices to use this module:: | MDEV CORE | | MODULE | | mdev.ko | - | +-----------+ | mdev_register_device() +--------------+ + | +-----------+ | mdev_register_parent() +--------------+ | | | +<------------------------+ | | | | | | nvidia.ko |<-> physical | | | +------------------------>+ | device | | | | callbacks +--------------+ | | Physical | | - | | device | | mdev_register_device() +--------------+ + | | device | | mdev_register_parent() +--------------+ | | interface | |<------------------------+ | | | | | | i915.ko |<-> physical | | | +------------------------>+ | device | | | | callbacks +--------------+ | | | | - | | | | mdev_register_device() +--------------+ + | | | | mdev_register_parent() +--------------+ | | | +<------------------------+ | | | | | | ccw_device.ko|<-> physical | | | +------------------------>+ | device @@ -127,8 +127,8 @@ vfio_device_ops. When a driver wants to add the GUID creation sysfs to an existing device it has probe'd to then it should call:: - extern int mdev_register_device(struct device *dev, - struct mdev_driver *mdev_driver); + int mdev_register_parent(struct mdev_parent *parent, struct device *dev, + struct mdev_driver *mdev_driver); This will provide the 'mdev_supported_types/XX/create' files which can then be used to trigger the creation of a mdev_device. The created mdev_device will be @@ -136,7 +136,7 @@ attached to the specified driver. When the driver needs to remove itself it calls:: - extern void mdev_unregister_device(struct device *dev); + void mdev_unregister_parent(struct mdev_parent *parent); Which will unbind and destroy all the created mdevs and remove the sysfs files. diff --git a/Documentation/s390/vfio-ap.rst b/Documentation/s390/vfio-ap.rst index f57ae621f33e8..37e16158c7fbf 100644 --- a/Documentation/s390/vfio-ap.rst +++ b/Documentation/s390/vfio-ap.rst @@ -299,7 +299,7 @@ of the VFIO AP mediated matrix device driver:: | MDEV CORE | | MODULE | | mdev.ko | - | +---------+ | mdev_register_device() +--------------+ + | +---------+ | mdev_register_parent() +--------------+ | |Physical | +<-----------------------+ | | | device | | | vfio_ap.ko |<-> matrix | |interface| +----------------------->+ | device diff --git a/Documentation/s390/vfio-ccw.rst b/Documentation/s390/vfio-ccw.rst index 8aad08a8b8a50..ea928a3806f43 100644 --- a/Documentation/s390/vfio-ccw.rst +++ b/Documentation/s390/vfio-ccw.rst @@ -156,7 +156,7 @@ Below is a high Level block diagram:: | MDEV CORE | | MODULE | | mdev.ko | - | +---------+ | mdev_register_device() +--------------+ + | +---------+ | mdev_register_parent() +--------------+ | |Physical | +<-----------------------+ | | | device | | | vfio_ccw.ko |<-> subchannel | |interface| +----------------------->+ | device diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h index aee1a45da74bc..ddffd337f1c60 100644 --- a/drivers/gpu/drm/i915/gvt/gvt.h +++ b/drivers/gpu/drm/i915/gvt/gvt.h @@ -36,6 +36,7 @@ #include #include #include +#include #include "i915_drv.h" #include "intel_gvt.h" @@ -327,6 +328,7 @@ struct intel_gvt { struct intel_gvt_workload_scheduler scheduler; struct notifier_block shadow_ctx_notifier_block[I915_NUM_ENGINES]; DECLARE_HASHTABLE(cmd_table, GVT_CMD_HASH_BITS); + struct mdev_parent parent; struct intel_vgpu_type *types; unsigned int num_types; struct intel_vgpu *idle_vgpu; diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 50c0081c4f0d5..70401374c72bc 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -1958,7 +1958,7 @@ static void intel_gvt_clean_device(struct drm_i915_private *i915) if (drm_WARN_ON(&i915->drm, !gvt)) return; - mdev_unregister_device(i915->drm.dev); + mdev_unregister_parent(&gvt->parent); intel_gvt_cleanup_vgpu_type_groups(gvt); intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu); intel_gvt_clean_vgpu_types(gvt); @@ -2063,7 +2063,8 @@ static int intel_gvt_init_device(struct drm_i915_private *i915) if (ret) goto out_destroy_idle_vgpu; - ret = mdev_register_device(i915->drm.dev, &intel_vgpu_mdev_driver); + ret = mdev_register_parent(&gvt->parent, i915->drm.dev, + &intel_vgpu_mdev_driver); if (ret) goto out_cleanup_vgpu_type_groups; diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h index fa8df50bb49e3..22be5ac7d23c1 100644 --- a/drivers/s390/cio/cio.h +++ b/drivers/s390/cio/cio.h @@ -5,6 +5,7 @@ #include #include #include +#include #include #include #include @@ -108,6 +109,7 @@ struct subchannel { * frees it. Use driver_set_override() to set or clear it. */ const char *driver_override; + struct mdev_parent parent; } __attribute__ ((aligned(8))); DECLARE_PER_CPU_ALIGNED(struct irb, cio_irb); diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index b49e2e9db2dc6..9192a21085ce4 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -11,7 +11,6 @@ */ #include -#include #include #include @@ -660,10 +659,11 @@ struct mdev_driver vfio_ccw_mdev_driver = { int vfio_ccw_mdev_reg(struct subchannel *sch) { - return mdev_register_device(&sch->dev, &vfio_ccw_mdev_driver); + return mdev_register_parent(&sch->parent, &sch->dev, + &vfio_ccw_mdev_driver); } void vfio_ccw_mdev_unreg(struct subchannel *sch) { - mdev_unregister_device(&sch->dev); + mdev_unregister_parent(&sch->parent); } diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index a7d2a95796d36..834945150dc9f 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -1485,7 +1485,8 @@ int vfio_ap_mdev_register(void) if (ret) return ret; - ret = mdev_register_device(&matrix_dev->device, &vfio_ap_matrix_driver); + ret = mdev_register_parent(&matrix_dev->parent, &matrix_dev->device, + &vfio_ap_matrix_driver); if (ret) goto err_driver; return 0; @@ -1497,6 +1498,6 @@ int vfio_ap_mdev_register(void) void vfio_ap_mdev_unregister(void) { - mdev_unregister_device(&matrix_dev->device); + mdev_unregister_parent(&matrix_dev->parent); mdev_unregister_driver(&vfio_ap_matrix_driver); } diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index 6616aa83347ad..0191f6bc973a4 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -45,6 +45,7 @@ struct ap_matrix_dev { struct list_head mdev_list; struct mutex lock; struct ap_driver *vfio_ap_drv; + struct mdev_parent parent; }; extern struct ap_matrix_dev *matrix_dev; diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index 2c32923fbad27..d38faed14c689 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -18,8 +18,6 @@ #define DRIVER_AUTHOR "NVIDIA Corporation" #define DRIVER_DESC "Mediated device Core Driver" -static LIST_HEAD(parent_list); -static DEFINE_MUTEX(parent_list_lock); static struct class_compat *mdev_bus_compat_class; static LIST_HEAD(mdev_list); @@ -61,28 +59,6 @@ struct device *mtype_get_parent_dev(struct mdev_type *mtype) } EXPORT_SYMBOL(mtype_get_parent_dev); -/* Should be called holding parent_list_lock */ -static struct mdev_parent *__find_parent_device(struct device *dev) -{ - struct mdev_parent *parent; - - list_for_each_entry(parent, &parent_list, next) { - if (parent->dev == dev) - return parent; - } - return NULL; -} - -void mdev_release_parent(struct kref *kref) -{ - struct mdev_parent *parent = container_of(kref, struct mdev_parent, - ref); - struct device *dev = parent->dev; - - kfree(parent); - put_device(dev); -} - /* Caller must hold parent unreg_sem read or write lock */ static void mdev_device_remove_common(struct mdev_device *mdev) { @@ -105,125 +81,69 @@ static int mdev_device_remove_cb(struct device *dev, void *data) } /* - * mdev_register_device : Register a device + * mdev_register_parent: Register a device as parent for mdevs + * @parent: parent structure registered * @dev: device structure representing parent device. * @mdev_driver: Device driver to bind to the newly created mdev * - * Add device to list of registered parent devices. * Returns a negative value on error, otherwise 0. */ -int mdev_register_device(struct device *dev, struct mdev_driver *mdev_driver) +int mdev_register_parent(struct mdev_parent *parent, struct device *dev, + struct mdev_driver *mdev_driver) { - int ret; - struct mdev_parent *parent; char *env_string = "MDEV_STATE=registered"; char *envp[] = { env_string, NULL }; + int ret; /* check for mandatory ops */ if (!mdev_driver->supported_type_groups) return -EINVAL; - dev = get_device(dev); - if (!dev) - return -EINVAL; - - mutex_lock(&parent_list_lock); - - /* Check for duplicate */ - parent = __find_parent_device(dev); - if (parent) { - parent = NULL; - ret = -EEXIST; - goto add_dev_err; - } - - parent = kzalloc(sizeof(*parent), GFP_KERNEL); - if (!parent) { - ret = -ENOMEM; - goto add_dev_err; - } - - kref_init(&parent->ref); + memset(parent, 0, sizeof(*parent)); init_rwsem(&parent->unreg_sem); - parent->dev = dev; parent->mdev_driver = mdev_driver; if (!mdev_bus_compat_class) { mdev_bus_compat_class = class_compat_register("mdev_bus"); - if (!mdev_bus_compat_class) { - ret = -ENOMEM; - goto add_dev_err; - } + if (!mdev_bus_compat_class) + return -ENOMEM; } ret = parent_create_sysfs_files(parent); if (ret) - goto add_dev_err; + return ret; ret = class_compat_create_link(mdev_bus_compat_class, dev, NULL); if (ret) dev_warn(dev, "Failed to create compatibility class link\n"); - list_add(&parent->next, &parent_list); - mutex_unlock(&parent_list_lock); - dev_info(dev, "MDEV: Registered\n"); kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); - return 0; - -add_dev_err: - mutex_unlock(&parent_list_lock); - if (parent) - mdev_put_parent(parent); - else - put_device(dev); - return ret; } -EXPORT_SYMBOL(mdev_register_device); +EXPORT_SYMBOL(mdev_register_parent); /* - * mdev_unregister_device : Unregister a parent device - * @dev: device structure representing parent device. - * - * Remove device from list of registered parent devices. Give a chance to free - * existing mediated devices for given device. + * mdev_unregister_parent : Unregister a parent device + * @parent: parent structure to unregister */ - -void mdev_unregister_device(struct device *dev) +void mdev_unregister_parent(struct mdev_parent *parent) { - struct mdev_parent *parent; char *env_string = "MDEV_STATE=unregistered"; char *envp[] = { env_string, NULL }; - mutex_lock(&parent_list_lock); - parent = __find_parent_device(dev); - - if (!parent) { - mutex_unlock(&parent_list_lock); - return; - } - dev_info(dev, "MDEV: Unregistering\n"); - - list_del(&parent->next); - mutex_unlock(&parent_list_lock); + dev_info(parent->dev, "MDEV: Unregistering\n"); down_write(&parent->unreg_sem); - - class_compat_remove_link(mdev_bus_compat_class, dev, NULL); - - device_for_each_child(dev, NULL, mdev_device_remove_cb); - + class_compat_remove_link(mdev_bus_compat_class, parent->dev, NULL); + device_for_each_child(parent->dev, NULL, mdev_device_remove_cb); parent_remove_sysfs_files(parent); up_write(&parent->unreg_sem); - mdev_put_parent(parent); - - /* We still have the caller's reference to use for the uevent */ - kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); + kobject_uevent_env(&parent->dev->kobj, KOBJ_CHANGE, envp); } -EXPORT_SYMBOL(mdev_unregister_device); +EXPORT_SYMBOL(mdev_unregister_parent); static void mdev_device_release(struct device *dev) { diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h index 7c9fc79f3d838..297f911fdc890 100644 --- a/drivers/vfio/mdev/mdev_private.h +++ b/drivers/vfio/mdev/mdev_private.h @@ -13,17 +13,6 @@ int mdev_bus_register(void); void mdev_bus_unregister(void); -struct mdev_parent { - struct device *dev; - struct mdev_driver *mdev_driver; - struct kref ref; - struct list_head next; - struct kset *mdev_types_kset; - struct list_head type_list; - /* Synchronize device creation/removal with parent unregistration */ - struct rw_semaphore unreg_sem; -}; - struct mdev_type { struct kobject kobj; struct kobject *devices_kobj; @@ -48,16 +37,4 @@ void mdev_remove_sysfs_files(struct mdev_device *mdev); int mdev_device_create(struct mdev_type *kobj, const guid_t *uuid); int mdev_device_remove(struct mdev_device *dev); -void mdev_release_parent(struct kref *kref); - -static inline void mdev_get_parent(struct mdev_parent *parent) -{ - kref_get(&parent->ref); -} - -static inline void mdev_put_parent(struct mdev_parent *parent) -{ - kref_put(&parent->ref, mdev_release_parent); -} - #endif /* MDEV_PRIVATE_H */ diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index 4bfbf49aaa66a..b71ffc5594870 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -81,7 +81,7 @@ static void mdev_type_release(struct kobject *kobj) pr_debug("Releasing group %s\n", kobj->name); /* Pairs with the get in add_mdev_supported_type() */ - mdev_put_parent(type->parent); + put_device(type->parent->dev); kfree(type); } @@ -110,7 +110,7 @@ static struct mdev_type *add_mdev_supported_type(struct mdev_parent *parent, type->kobj.kset = parent->mdev_types_kset; type->parent = parent; /* Pairs with the put in mdev_type_release() */ - mdev_get_parent(parent); + get_device(parent->dev); type->type_group_id = type_group_id; ret = kobject_init_and_add(&type->kobj, &mdev_type_ktype, NULL, diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 555c1d015b5f0..327ce3e5c6b5f 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -23,6 +23,16 @@ struct mdev_device { bool active; }; +/* embedded into the struct device that the mdev devices hang off */ +struct mdev_parent { + struct device *dev; + struct mdev_driver *mdev_driver; + struct kset *mdev_types_kset; + struct list_head type_list; + /* Synchronize device creation/removal with parent unregistration */ + struct rw_semaphore unreg_sem; +}; + static inline struct mdev_device *to_mdev_device(struct device *dev) { return container_of(dev, struct mdev_device, dev); @@ -75,8 +85,9 @@ static inline const guid_t *mdev_uuid(struct mdev_device *mdev) extern struct bus_type mdev_bus_type; -int mdev_register_device(struct device *dev, struct mdev_driver *mdev_driver); -void mdev_unregister_device(struct device *dev); +int mdev_register_parent(struct mdev_parent *parent, struct device *dev, + struct mdev_driver *mdev_driver); +void mdev_unregister_parent(struct mdev_parent *parent); int mdev_register_driver(struct mdev_driver *drv); void mdev_unregister_driver(struct mdev_driver *drv); diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index d0d1bb7747240..30b3643b3b389 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -128,6 +128,7 @@ static dev_t mbochs_devt; static struct class *mbochs_class; static struct cdev mbochs_cdev; static struct device mbochs_dev; +static struct mdev_parent mbochs_parent; static atomic_t mbochs_avail_mbytes; static const struct vfio_device_ops mbochs_dev_ops; @@ -1456,7 +1457,7 @@ static int __init mbochs_dev_init(void) if (ret) goto err_class; - ret = mdev_register_device(&mbochs_dev, &mbochs_driver); + ret = mdev_register_parent(&mbochs_parent, &mbochs_dev, &mbochs_driver); if (ret) goto err_device; @@ -1477,7 +1478,7 @@ static int __init mbochs_dev_init(void) static void __exit mbochs_dev_exit(void) { mbochs_dev.bus = NULL; - mdev_unregister_device(&mbochs_dev); + mdev_unregister_parent(&mbochs_parent); device_unregister(&mbochs_dev); mdev_unregister_driver(&mbochs_driver); diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index 0c4ca1f4be7ed..132bb055628a6 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -83,6 +83,7 @@ static dev_t mdpy_devt; static struct class *mdpy_class; static struct cdev mdpy_cdev; static struct device mdpy_dev; +static struct mdev_parent mdpy_parent; static u32 mdpy_count; static const struct vfio_device_ops mdpy_dev_ops; @@ -765,7 +766,7 @@ static int __init mdpy_dev_init(void) if (ret) goto err_class; - ret = mdev_register_device(&mdpy_dev, &mdpy_driver); + ret = mdev_register_parent(&mdpy_parent, &mdpy_dev, &mdpy_driver); if (ret) goto err_device; @@ -786,7 +787,7 @@ static int __init mdpy_dev_init(void) static void __exit mdpy_dev_exit(void) { mdpy_dev.bus = NULL; - mdev_unregister_device(&mdpy_dev); + mdev_unregister_parent(&mdpy_parent); device_unregister(&mdpy_dev); mdev_unregister_driver(&mdpy_driver); diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index 4f5a6f2d3629d..8ba5f6084a093 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -72,6 +72,7 @@ static struct mtty_dev { struct cdev vd_cdev; struct idr vd_idr; struct device dev; + struct mdev_parent parent; } mtty_dev; struct mdev_region_info { @@ -1350,7 +1351,8 @@ static int __init mtty_dev_init(void) if (ret) goto err_class; - ret = mdev_register_device(&mtty_dev.dev, &mtty_driver); + ret = mdev_register_parent(&mtty_dev.parent, &mtty_dev.dev, + &mtty_driver); if (ret) goto err_device; return 0; @@ -1370,7 +1372,7 @@ static int __init mtty_dev_init(void) static void __exit mtty_dev_exit(void) { mtty_dev.dev.bus = NULL; - mdev_unregister_device(&mtty_dev.dev); + mdev_unregister_parent(&mtty_dev.parent); device_unregister(&mtty_dev.dev); idr_destroy(&mtty_dev.vd_idr); 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See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Instead of abusing struct attribute_group to control initialization of struct mdev_type, just define the actual attributes in the mdev_driver, allocate the mdev_type structures in the caller and pass them to mdev_register_parent. This allows the caller to use container_of to get at the containing struture and thus significantly simplify the code. Signed-off-by: Christoph Hellwig --- .../driver-api/vfio-mediated-device.rst | 2 +- drivers/gpu/drm/i915/gvt/gvt.h | 3 +- drivers/gpu/drm/i915/gvt/kvmgt.c | 98 ++-------------- drivers/gpu/drm/i915/gvt/vgpu.c | 18 ++- drivers/s390/cio/cio.h | 2 + drivers/s390/cio/vfio_ccw_ops.c | 19 +-- drivers/s390/crypto/vfio_ap_ops.c | 19 +-- drivers/s390/crypto/vfio_ap_private.h | 2 + drivers/vfio/mdev/mdev_core.c | 54 ++++----- drivers/vfio/mdev/mdev_driver.c | 5 +- drivers/vfio/mdev/mdev_private.h | 14 +-- drivers/vfio/mdev/mdev_sysfs.c | 111 ++---------------- include/linux/mdev.h | 26 ++-- samples/vfio-mdev/mbochs.c | 57 ++++----- samples/vfio-mdev/mdpy.c | 50 +++----- samples/vfio-mdev/mtty.c | 62 +++++----- 16 files changed, 181 insertions(+), 361 deletions(-) diff --git a/Documentation/driver-api/vfio-mediated-device.rst b/Documentation/driver-api/vfio-mediated-device.rst index 3749f59c855fa..599008bdc1dcb 100644 --- a/Documentation/driver-api/vfio-mediated-device.rst +++ b/Documentation/driver-api/vfio-mediated-device.rst @@ -105,7 +105,7 @@ structure to represent a mediated device's driver:: struct mdev_driver { int (*probe) (struct mdev_device *dev); void (*remove) (struct mdev_device *dev); - struct attribute_group **supported_type_groups; + const struct attribute * const *types_attrs; struct device_driver driver; }; diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h index ddffd337f1c60..0ccb9bb7180cd 100644 --- a/drivers/gpu/drm/i915/gvt/gvt.h +++ b/drivers/gpu/drm/i915/gvt/gvt.h @@ -298,7 +298,7 @@ struct intel_gvt_firmware { #define NR_MAX_INTEL_VGPU_TYPES 20 struct intel_vgpu_type { - char name[16]; + struct mdev_type type; unsigned int avail_instance; unsigned int low_gm_size; unsigned int high_gm_size; @@ -329,6 +329,7 @@ struct intel_gvt { struct notifier_block shadow_ctx_notifier_block[I915_NUM_ENGINES]; DECLARE_HASHTABLE(cmd_table, GVT_CMD_HASH_BITS); struct mdev_parent parent; + struct mdev_type **mdev_types; struct intel_vgpu_type *types; unsigned int num_types; struct intel_vgpu *idle_vgpu; diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 70401374c72bc..1c6b7e8bec4fb 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -117,17 +117,10 @@ static ssize_t available_instances_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - struct intel_vgpu_type *type; - unsigned int num = 0; - struct intel_gvt *gvt = kdev_to_i915(mtype_get_parent_dev(mtype))->gvt; + struct intel_vgpu_type *type = + container_of(mtype, struct intel_vgpu_type, type); - type = &gvt->types[mtype_get_type_group_id(mtype)]; - if (!type) - num = 0; - else - num = type->avail_instance; - - return sprintf(buf, "%u\n", num); + return sprintf(buf, "%u\n", type->avail_instance); } static ssize_t device_api_show(struct mdev_type *mtype, @@ -139,12 +132,8 @@ static ssize_t device_api_show(struct mdev_type *mtype, static ssize_t description_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - struct intel_vgpu_type *type; - struct intel_gvt *gvt = kdev_to_i915(mtype_get_parent_dev(mtype))->gvt; - - type = &gvt->types[mtype_get_type_group_id(mtype)]; - if (!type) - return 0; + struct intel_vgpu_type *type = + container_of(mtype, struct intel_vgpu_type, type); return sprintf(buf, "low_gm_size: %dMB\nhigh_gm_size: %dMB\n" "fence: %d\nresolution: %s\n" @@ -158,14 +147,7 @@ static ssize_t description_show(struct mdev_type *mtype, static ssize_t name_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - struct intel_vgpu_type *type; - struct intel_gvt *gvt = kdev_to_i915(mtype_get_parent_dev(mtype))->gvt; - - type = &gvt->types[mtype_get_type_group_id(mtype)]; - if (!type) - return 0; - - return sprintf(buf, "%s\n", type->name); + return sprintf(buf, "%s\n", mtype->sysfs_name); } static MDEV_TYPE_ATTR_RO(available_instances); @@ -173,7 +155,7 @@ static MDEV_TYPE_ATTR_RO(device_api); static MDEV_TYPE_ATTR_RO(description); static MDEV_TYPE_ATTR_RO(name); -static struct attribute *gvt_type_attrs[] = { +static const struct attribute *gvt_type_attrs[] = { &mdev_type_attr_available_instances.attr, &mdev_type_attr_device_api.attr, &mdev_type_attr_description.attr, @@ -181,51 +163,6 @@ static struct attribute *gvt_type_attrs[] = { NULL, }; -static struct attribute_group *gvt_vgpu_type_groups[] = { - [0 ... NR_MAX_INTEL_VGPU_TYPES - 1] = NULL, -}; - -static int intel_gvt_init_vgpu_type_groups(struct intel_gvt *gvt) -{ - int i, j; - struct intel_vgpu_type *type; - struct attribute_group *group; - - for (i = 0; i < gvt->num_types; i++) { - type = &gvt->types[i]; - - group = kzalloc(sizeof(struct attribute_group), GFP_KERNEL); - if (!group) - goto unwind; - - group->name = type->name; - group->attrs = gvt_type_attrs; - gvt_vgpu_type_groups[i] = group; - } - - return 0; - -unwind: - for (j = 0; j < i; j++) { - group = gvt_vgpu_type_groups[j]; - kfree(group); - } - - return -ENOMEM; -} - -static void intel_gvt_cleanup_vgpu_type_groups(struct intel_gvt *gvt) -{ - int i; - struct attribute_group *group; - - for (i = 0; i < gvt->num_types; i++) { - group = gvt_vgpu_type_groups[i]; - gvt_vgpu_type_groups[i] = NULL; - kfree(group); - } -} - static void gvt_unpin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn, unsigned long size) { @@ -1614,14 +1551,11 @@ static int intel_vgpu_probe(struct mdev_device *mdev) { struct device *pdev = mdev_parent_dev(mdev); struct intel_gvt *gvt = kdev_to_i915(pdev)->gvt; - struct intel_vgpu_type *type; + struct intel_vgpu_type *type = + container_of(mdev->type, struct intel_vgpu_type, type); struct intel_vgpu *vgpu; int ret; - type = &gvt->types[mdev_get_type_group_id(mdev)]; - if (!type) - return -EINVAL; - vgpu = intel_gvt_create_vgpu(gvt, type); if (IS_ERR(vgpu)) { gvt_err("failed to create intel vgpu: %ld\n", PTR_ERR(vgpu)); @@ -1660,7 +1594,7 @@ static struct mdev_driver intel_vgpu_mdev_driver = { }, .probe = intel_vgpu_probe, .remove = intel_vgpu_remove, - .supported_type_groups = gvt_vgpu_type_groups, + .types_attrs = gvt_type_attrs, }; int intel_gvt_page_track_add(struct intel_vgpu *info, u64 gfn) @@ -1959,7 +1893,6 @@ static void intel_gvt_clean_device(struct drm_i915_private *i915) return; mdev_unregister_parent(&gvt->parent); - intel_gvt_cleanup_vgpu_type_groups(gvt); intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu); intel_gvt_clean_vgpu_types(gvt); @@ -2059,20 +1992,15 @@ static int intel_gvt_init_device(struct drm_i915_private *i915) intel_gvt_debugfs_init(gvt); - ret = intel_gvt_init_vgpu_type_groups(gvt); - if (ret) - goto out_destroy_idle_vgpu; - ret = mdev_register_parent(&gvt->parent, i915->drm.dev, - &intel_vgpu_mdev_driver); + &intel_vgpu_mdev_driver, + gvt->mdev_types, gvt->num_types); if (ret) - goto out_cleanup_vgpu_type_groups; + goto out_destroy_idle_vgpu; gvt_dbg_core("gvt device initialization is done\n"); return 0; -out_cleanup_vgpu_type_groups: - intel_gvt_cleanup_vgpu_type_groups(gvt); out_destroy_idle_vgpu: intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu); intel_gvt_debugfs_clean(gvt); diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c index 46da19b3225d2..2f38b90ecb8ac 100644 --- a/drivers/gpu/drm/i915/gvt/vgpu.c +++ b/drivers/gpu/drm/i915/gvt/vgpu.c @@ -131,6 +131,13 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) if (!gvt->types) return -ENOMEM; + gvt->mdev_types = kcalloc(num_types, sizeof(*gvt->mdev_types), + GFP_KERNEL); + if (!gvt->mdev_types) { + kfree(gvt->types); + return -ENOMEM; + } + min_low = MB_TO_BYTES(32); for (i = 0; i < num_types; ++i) { if (low_avail / vgpu_types[i].low_mm == 0) @@ -150,19 +157,21 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) high_avail / vgpu_types[i].high_mm); if (GRAPHICS_VER(gvt->gt->i915) == 8) - sprintf(gvt->types[i].name, "GVTg_V4_%s", + sprintf(gvt->types[i].type.sysfs_name, "GVTg_V4_%s", vgpu_types[i].name); else if (GRAPHICS_VER(gvt->gt->i915) == 9) - sprintf(gvt->types[i].name, "GVTg_V5_%s", + sprintf(gvt->types[i].type.sysfs_name, "GVTg_V5_%s", vgpu_types[i].name); gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u weight %u res %s\n", - i, gvt->types[i].name, + i, gvt->types[i].type.sysfs_name, gvt->types[i].avail_instance, gvt->types[i].low_gm_size, gvt->types[i].high_gm_size, gvt->types[i].fence, gvt->types[i].weight, vgpu_edid_str(gvt->types[i].resolution)); + + gvt->mdev_types[i] = &gvt->types[i].type; } gvt->num_types = i; @@ -171,6 +180,7 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt) { + kfree(gvt->mdev_types); kfree(gvt->types); } @@ -198,7 +208,7 @@ static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt) fence_min); gvt_dbg_core("update type[%d]: %s avail %u low %u high %u fence %u\n", - i, gvt->types[i].name, + i, gvt->types[i].type.sysfs_name, gvt->types[i].avail_instance, gvt->types[i].low_gm_size, gvt->types[i].high_gm_size, gvt->types[i].fence); } diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h index 22be5ac7d23c1..1da45307a1862 100644 --- a/drivers/s390/cio/cio.h +++ b/drivers/s390/cio/cio.h @@ -110,6 +110,8 @@ struct subchannel { */ const char *driver_override; struct mdev_parent parent; + struct mdev_type mdev_type; + struct mdev_type *mdev_types[1]; } __attribute__ ((aligned(8))); DECLARE_PER_CPU_ALIGNED(struct irb, cio_irb); diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 9192a21085ce4..25b8d42a522ac 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -95,23 +95,13 @@ static ssize_t available_instances_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(available_instances); -static struct attribute *mdev_types_attrs[] = { +static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_name.attr, &mdev_type_attr_device_api.attr, &mdev_type_attr_available_instances.attr, NULL, }; -static struct attribute_group mdev_type_group = { - .name = "io", - .attrs = mdev_types_attrs, -}; - -static struct attribute_group *mdev_type_groups[] = { - &mdev_type_group, - NULL, -}; - static int vfio_ccw_mdev_probe(struct mdev_device *mdev) { struct vfio_ccw_private *private = dev_get_drvdata(mdev->dev.parent); @@ -654,13 +644,16 @@ struct mdev_driver vfio_ccw_mdev_driver = { }, .probe = vfio_ccw_mdev_probe, .remove = vfio_ccw_mdev_remove, - .supported_type_groups = mdev_type_groups, + .types_attrs = mdev_types_attrs, }; int vfio_ccw_mdev_reg(struct subchannel *sch) { + sprintf(sch->mdev_type.sysfs_name, "io"); + sch->mdev_types[0] = &sch->mdev_type; return mdev_register_parent(&sch->parent, &sch->dev, - &vfio_ccw_mdev_driver); + &vfio_ccw_mdev_driver, sch->mdev_types, + 1); } void vfio_ccw_mdev_unreg(struct subchannel *sch) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 834945150dc9f..ff25858b2ebbe 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -537,23 +537,13 @@ static ssize_t device_api_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(device_api); -static struct attribute *vfio_ap_mdev_type_attrs[] = { +static const struct attribute *vfio_ap_mdev_type_attrs[] = { &mdev_type_attr_name.attr, &mdev_type_attr_device_api.attr, &mdev_type_attr_available_instances.attr, NULL, }; -static struct attribute_group vfio_ap_mdev_hwvirt_type_group = { - .name = VFIO_AP_MDEV_TYPE_HWVIRT, - .attrs = vfio_ap_mdev_type_attrs, -}; - -static struct attribute_group *vfio_ap_mdev_type_groups[] = { - &vfio_ap_mdev_hwvirt_type_group, - NULL, -}; - struct vfio_ap_queue_reserved { unsigned long *apid; unsigned long *apqi; @@ -1472,7 +1462,7 @@ static struct mdev_driver vfio_ap_matrix_driver = { }, .probe = vfio_ap_mdev_probe, .remove = vfio_ap_mdev_remove, - .supported_type_groups = vfio_ap_mdev_type_groups, + .types_attrs = vfio_ap_mdev_type_attrs, }; int vfio_ap_mdev_register(void) @@ -1485,8 +1475,11 @@ int vfio_ap_mdev_register(void) if (ret) return ret; + strcpy(matrix_dev->mdev_type.sysfs_name, VFIO_AP_MDEV_TYPE_HWVIRT); + matrix_dev->mdev_types[0] = &matrix_dev->mdev_type; ret = mdev_register_parent(&matrix_dev->parent, &matrix_dev->device, - &vfio_ap_matrix_driver); + &vfio_ap_matrix_driver, + matrix_dev->mdev_types, 1); if (ret) goto err_driver; return 0; diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index 0191f6bc973a4..5dc5050d03791 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -46,6 +46,8 @@ struct ap_matrix_dev { struct mutex lock; struct ap_driver *vfio_ap_drv; struct mdev_parent parent; + struct mdev_type mdev_type; + struct mdev_type *mdev_types[]; }; extern struct ap_matrix_dev *matrix_dev; diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index d38faed14c689..71c7f4e521a74 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -29,26 +29,6 @@ struct device *mdev_parent_dev(struct mdev_device *mdev) } EXPORT_SYMBOL(mdev_parent_dev); -/* - * Return the index in supported_type_groups that this mdev_device was created - * from. - */ -unsigned int mdev_get_type_group_id(struct mdev_device *mdev) -{ - return mdev->type->type_group_id; -} -EXPORT_SYMBOL(mdev_get_type_group_id); - -/* - * Used in mdev_type_attribute sysfs functions to return the index in the - * supported_type_groups that the sysfs is called from. - */ -unsigned int mtype_get_type_group_id(struct mdev_type *mtype) -{ - return mtype->type_group_id; -} -EXPORT_SYMBOL(mtype_get_type_group_id); - /* * Used in mdev_type_attribute sysfs functions to return the parent struct * device @@ -85,19 +65,19 @@ static int mdev_device_remove_cb(struct device *dev, void *data) * @parent: parent structure registered * @dev: device structure representing parent device. * @mdev_driver: Device driver to bind to the newly created mdev + * @types: Array of supported mdev types + * @nr_types: Number of entries in @types * * Returns a negative value on error, otherwise 0. */ int mdev_register_parent(struct mdev_parent *parent, struct device *dev, - struct mdev_driver *mdev_driver) + struct mdev_driver *mdev_driver, struct mdev_type **types, + unsigned int nr_types) { char *env_string = "MDEV_STATE=registered"; char *envp[] = { env_string, NULL }; int ret; - - /* check for mandatory ops */ - if (!mdev_driver->supported_type_groups) - return -EINVAL; + int i; memset(parent, 0, sizeof(*parent)); init_rwsem(&parent->unreg_sem); @@ -110,9 +90,23 @@ int mdev_register_parent(struct mdev_parent *parent, struct device *dev, return -ENOMEM; } - ret = parent_create_sysfs_files(parent); - if (ret) + parent->mdev_types_kset = kset_create_and_add("mdev_supported_types", + NULL, &parent->dev->kobj); + if (!parent->mdev_types_kset) + return -ENOMEM; + + for (i = 0; i < nr_types; i++) { + ret = mdev_type_add(parent, types[i]); + if (ret) + break; + } + parent->types = types; + parent->nr_types = i; + + if (ret) { + mdev_unregister_parent(parent); return ret; + } ret = class_compat_create_link(mdev_bus_compat_class, dev, NULL); if (ret) @@ -132,13 +126,17 @@ void mdev_unregister_parent(struct mdev_parent *parent) { char *env_string = "MDEV_STATE=unregistered"; char *envp[] = { env_string, NULL }; + int i; dev_info(parent->dev, "MDEV: Unregistering\n"); + for (i = 0; i < parent->nr_types; i++) + mdev_type_remove(parent->types[i]); + down_write(&parent->unreg_sem); class_compat_remove_link(mdev_bus_compat_class, parent->dev, NULL); device_for_each_child(parent->dev, NULL, mdev_device_remove_cb); - parent_remove_sysfs_files(parent); + kset_unregister(parent->mdev_types_kset); up_write(&parent->unreg_sem); kobject_uevent_env(&parent->dev->kobj, KOBJ_CHANGE, envp); diff --git a/drivers/vfio/mdev/mdev_driver.c b/drivers/vfio/mdev/mdev_driver.c index 7bd4bb9850e81..1da1ecf76a0d5 100644 --- a/drivers/vfio/mdev/mdev_driver.c +++ b/drivers/vfio/mdev/mdev_driver.c @@ -56,10 +56,9 @@ EXPORT_SYMBOL_GPL(mdev_bus_type); **/ int mdev_register_driver(struct mdev_driver *drv) { - /* initialize common driver fields */ + if (!drv->types_attrs) + return -EINVAL; drv->driver.bus = &mdev_bus_type; - - /* register with core */ return driver_register(&drv->driver); } EXPORT_SYMBOL(mdev_register_driver); diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h index 297f911fdc890..6980f504018f3 100644 --- a/drivers/vfio/mdev/mdev_private.h +++ b/drivers/vfio/mdev/mdev_private.h @@ -13,14 +13,6 @@ int mdev_bus_register(void); void mdev_bus_unregister(void); -struct mdev_type { - struct kobject kobj; - struct kobject *devices_kobj; - struct mdev_parent *parent; - struct list_head next; - unsigned int type_group_id; -}; - extern const struct attribute_group *mdev_device_groups[]; #define to_mdev_type_attr(_attr) \ @@ -28,12 +20,12 @@ extern const struct attribute_group *mdev_device_groups[]; #define to_mdev_type(_kobj) \ container_of(_kobj, struct mdev_type, kobj) -int parent_create_sysfs_files(struct mdev_parent *parent); -void parent_remove_sysfs_files(struct mdev_parent *parent); - int mdev_create_sysfs_files(struct mdev_device *mdev); void mdev_remove_sysfs_files(struct mdev_device *mdev); +int mdev_type_add(struct mdev_parent *parent, struct mdev_type *type); +void mdev_type_remove(struct mdev_type *type); + int mdev_device_create(struct mdev_type *kobj, const guid_t *uuid); int mdev_device_remove(struct mdev_device *dev); diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index b71ffc5594870..09745e8e120f9 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -80,8 +80,6 @@ static void mdev_type_release(struct kobject *kobj) struct mdev_type *type = to_mdev_type(kobj); pr_debug("Releasing group %s\n", kobj->name); - /* Pairs with the get in add_mdev_supported_type() */ - put_device(type->parent->dev); kfree(type); } @@ -90,36 +88,17 @@ static struct kobj_type mdev_type_ktype = { .release = mdev_type_release, }; -static struct mdev_type *add_mdev_supported_type(struct mdev_parent *parent, - unsigned int type_group_id) +int mdev_type_add(struct mdev_parent *parent, struct mdev_type *type) { - struct mdev_type *type; - struct attribute_group *group = - parent->mdev_driver->supported_type_groups[type_group_id]; int ret; - if (!group->name) { - pr_err("%s: Type name empty!\n", __func__); - return ERR_PTR(-EINVAL); - } - - type = kzalloc(sizeof(*type), GFP_KERNEL); - if (!type) - return ERR_PTR(-ENOMEM); - - type->kobj.kset = parent->mdev_types_kset; type->parent = parent; - /* Pairs with the put in mdev_type_release() */ - get_device(parent->dev); - type->type_group_id = type_group_id; - - ret = kobject_init_and_add(&type->kobj, &mdev_type_ktype, NULL, - "%s-%s", dev_driver_string(parent->dev), - group->name); - if (ret) { - kobject_put(&type->kobj); - return ERR_PTR(ret); - } + type->kobj.kset = parent->mdev_types_kset; + ret = kobject_init_and_add(&type->kobj, &mdev_type_ktype, NULL, "%s-%s", + dev_driver_string(parent->dev), + type->sysfs_name); + if (ret) + return ret; ret = sysfs_create_file(&type->kobj, &mdev_type_attr_create.attr); if (ret) @@ -131,13 +110,10 @@ static struct mdev_type *add_mdev_supported_type(struct mdev_parent *parent, goto attr_devices_failed; } - ret = sysfs_create_files(&type->kobj, - (const struct attribute **)group->attrs); - if (ret) { - ret = -ENOMEM; + ret = sysfs_create_files(&type->kobj, parent->mdev_driver->types_attrs); + if (ret) goto attrs_failed; - } - return type; + return 0; attrs_failed: kobject_put(type->devices_kobj); @@ -146,80 +122,19 @@ static struct mdev_type *add_mdev_supported_type(struct mdev_parent *parent, attr_create_failed: kobject_del(&type->kobj); kobject_put(&type->kobj); - return ERR_PTR(ret); + return ret; } -static void remove_mdev_supported_type(struct mdev_type *type) +void mdev_type_remove(struct mdev_type *type) { - struct attribute_group *group = - type->parent->mdev_driver->supported_type_groups[type->type_group_id]; + sysfs_remove_files(&type->kobj, type->parent->mdev_driver->types_attrs); - sysfs_remove_files(&type->kobj, - (const struct attribute **)group->attrs); kobject_put(type->devices_kobj); sysfs_remove_file(&type->kobj, &mdev_type_attr_create.attr); kobject_del(&type->kobj); kobject_put(&type->kobj); } -static int add_mdev_supported_type_groups(struct mdev_parent *parent) -{ - int i; - - for (i = 0; parent->mdev_driver->supported_type_groups[i]; i++) { - struct mdev_type *type; - - type = add_mdev_supported_type(parent, i); - if (IS_ERR(type)) { - struct mdev_type *ltype, *tmp; - - list_for_each_entry_safe(ltype, tmp, &parent->type_list, - next) { - list_del(<ype->next); - remove_mdev_supported_type(ltype); - } - return PTR_ERR(type); - } - list_add(&type->next, &parent->type_list); - } - return 0; -} - -/* mdev sysfs functions */ -void parent_remove_sysfs_files(struct mdev_parent *parent) -{ - struct mdev_type *type, *tmp; - - list_for_each_entry_safe(type, tmp, &parent->type_list, next) { - list_del(&type->next); - remove_mdev_supported_type(type); - } - - kset_unregister(parent->mdev_types_kset); -} - -int parent_create_sysfs_files(struct mdev_parent *parent) -{ - int ret; - - parent->mdev_types_kset = kset_create_and_add("mdev_supported_types", - NULL, &parent->dev->kobj); - - if (!parent->mdev_types_kset) - return -ENOMEM; - - INIT_LIST_HEAD(&parent->type_list); - - ret = add_mdev_supported_type_groups(parent); - if (ret) - goto create_err; - return 0; - -create_err: - kset_unregister(parent->mdev_types_kset); - return ret; -} - static ssize_t remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 327ce3e5c6b5f..d28ddf0f561a0 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -23,14 +23,27 @@ struct mdev_device { bool active; }; +struct mdev_type { + /* set by the driver before calling mdev_register parent: */ + char sysfs_name[32]; + + /* set by the core, can be used drivers */ + struct mdev_parent *parent; + + /* internal only */ + struct kobject kobj; + struct kobject *devices_kobj; +}; + /* embedded into the struct device that the mdev devices hang off */ struct mdev_parent { struct device *dev; struct mdev_driver *mdev_driver; struct kset *mdev_types_kset; - struct list_head type_list; /* Synchronize device creation/removal with parent unregistration */ struct rw_semaphore unreg_sem; + struct mdev_type **types; + unsigned int nr_types; }; static inline struct mdev_device *to_mdev_device(struct device *dev) @@ -38,8 +51,6 @@ static inline struct mdev_device *to_mdev_device(struct device *dev) return container_of(dev, struct mdev_device, dev); } -unsigned int mdev_get_type_group_id(struct mdev_device *mdev); -unsigned int mtype_get_type_group_id(struct mdev_type *mtype); struct device *mtype_get_parent_dev(struct mdev_type *mtype); /* interface for exporting mdev supported type attributes */ @@ -66,15 +77,13 @@ struct mdev_type_attribute mdev_type_attr_##_name = \ * struct mdev_driver - Mediated device driver * @probe: called when new device created * @remove: called when device removed - * @supported_type_groups: Attributes to define supported types. It is mandatory - * to provide supported types. + * @types_attrs: attributes to the type kobjects. * @driver: device driver structure - * **/ struct mdev_driver { int (*probe)(struct mdev_device *dev); void (*remove)(struct mdev_device *dev); - struct attribute_group **supported_type_groups; + const struct attribute * const *types_attrs; struct device_driver driver; }; @@ -86,7 +95,8 @@ static inline const guid_t *mdev_uuid(struct mdev_device *mdev) extern struct bus_type mdev_bus_type; int mdev_register_parent(struct mdev_parent *parent, struct device *dev, - struct mdev_driver *mdev_driver); + struct mdev_driver *mdev_driver, struct mdev_type **types, + unsigned int nr_types); void mdev_unregister_parent(struct mdev_parent *parent); int mdev_register_driver(struct mdev_driver *drv); diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index 30b3643b3b389..1069f561cb012 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -99,23 +99,27 @@ MODULE_PARM_DESC(mem, "megabytes available to " MBOCHS_NAME " devices"); #define MBOCHS_TYPE_2 "medium" #define MBOCHS_TYPE_3 "large" -static const struct mbochs_type { +static struct mbochs_type { + struct mdev_type type; const char *name; u32 mbytes; u32 max_x; u32 max_y; } mbochs_types[] = { { + .type.sysfs_name = MBOCHS_TYPE_1, .name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_1, .mbytes = 4, .max_x = 800, .max_y = 600, }, { + .type.sysfs_name = MBOCHS_TYPE_2, .name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_2, .mbytes = 16, .max_x = 1920, .max_y = 1440, }, { + .type.sysfs_name = MBOCHS_TYPE_3, .name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_3, .mbytes = 64, .max_x = 0, @@ -123,6 +127,11 @@ static const struct mbochs_type { }, }; +static struct mdev_type *mbochs_mdev_types[] = { + &mbochs_types[0].type, + &mbochs_types[1].type, + &mbochs_types[2].type, +}; static dev_t mbochs_devt; static struct class *mbochs_class; @@ -508,8 +517,8 @@ static int mbochs_reset(struct mdev_state *mdev_state) static int mbochs_probe(struct mdev_device *mdev) { int avail_mbytes = atomic_read(&mbochs_avail_mbytes); - const struct mbochs_type *type = - &mbochs_types[mdev_get_type_group_id(mdev)]; + struct mbochs_type *type = + container_of(mdev->type, struct mbochs_type, type); struct device *dev = mdev_dev(mdev); struct mdev_state *mdev_state; int ret = -ENOMEM; @@ -1328,8 +1337,8 @@ static const struct attribute_group *mdev_dev_groups[] = { static ssize_t name_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - const struct mbochs_type *type = - &mbochs_types[mtype_get_type_group_id(mtype)]; + struct mbochs_type *type = + container_of(mtype, struct mbochs_type, type); return sprintf(buf, "%s\n", type->name); } @@ -1338,8 +1347,8 @@ static MDEV_TYPE_ATTR_RO(name); static ssize_t description_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - const struct mbochs_type *type = - &mbochs_types[mtype_get_type_group_id(mtype)]; + struct mbochs_type *type = + container_of(mtype, struct mbochs_type, type); return sprintf(buf, "virtual display, %d MB video memory\n", type ? type->mbytes : 0); @@ -1350,8 +1359,8 @@ static ssize_t available_instances_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - const struct mbochs_type *type = - &mbochs_types[mtype_get_type_group_id(mtype)]; + struct mbochs_type *type = + container_of(mtype, struct mbochs_type, type); int count = atomic_read(&mbochs_avail_mbytes) / type->mbytes; return sprintf(buf, "%d\n", count); @@ -1365,7 +1374,7 @@ static ssize_t device_api_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(device_api); -static struct attribute *mdev_types_attrs[] = { +static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_name.attr, &mdev_type_attr_description.attr, &mdev_type_attr_device_api.attr, @@ -1373,28 +1382,6 @@ static struct attribute *mdev_types_attrs[] = { NULL, }; -static struct attribute_group mdev_type_group1 = { - .name = MBOCHS_TYPE_1, - .attrs = mdev_types_attrs, -}; - -static struct attribute_group mdev_type_group2 = { - .name = MBOCHS_TYPE_2, - .attrs = mdev_types_attrs, -}; - -static struct attribute_group mdev_type_group3 = { - .name = MBOCHS_TYPE_3, - .attrs = mdev_types_attrs, -}; - -static struct attribute_group *mdev_type_groups[] = { - &mdev_type_group1, - &mdev_type_group2, - &mdev_type_group3, - NULL, -}; - static const struct vfio_device_ops mbochs_dev_ops = { .close_device = mbochs_close_device, .read = mbochs_read, @@ -1412,7 +1399,7 @@ static struct mdev_driver mbochs_driver = { }, .probe = mbochs_probe, .remove = mbochs_remove, - .supported_type_groups = mdev_type_groups, + .types_attrs = mdev_types_attrs, }; static const struct file_operations vd_fops = { @@ -1457,7 +1444,9 @@ static int __init mbochs_dev_init(void) if (ret) goto err_class; - ret = mdev_register_parent(&mbochs_parent, &mbochs_dev, &mbochs_driver); + ret = mdev_register_parent(&mbochs_parent, &mbochs_dev, &mbochs_driver, + mbochs_mdev_types, + ARRAY_SIZE(mbochs_mdev_types)); if (ret) goto err_device; diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index 132bb055628a6..40b1c8a58157c 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -51,7 +51,8 @@ MODULE_PARM_DESC(count, "number of " MDPY_NAME " devices"); #define MDPY_TYPE_2 "xga" #define MDPY_TYPE_3 "hd" -static const struct mdpy_type { +static struct mdpy_type { + struct mdev_type type; const char *name; u32 format; u32 bytepp; @@ -59,18 +60,21 @@ static const struct mdpy_type { u32 height; } mdpy_types[] = { { + .type.sysfs_name = MDPY_TYPE_1, .name = MDPY_CLASS_NAME "-" MDPY_TYPE_1, .format = DRM_FORMAT_XRGB8888, .bytepp = 4, .width = 640, .height = 480, }, { + .type.sysfs_name = MDPY_TYPE_2, .name = MDPY_CLASS_NAME "-" MDPY_TYPE_2, .format = DRM_FORMAT_XRGB8888, .bytepp = 4, .width = 1024, .height = 768, }, { + .type.sysfs_name = MDPY_TYPE_3, .name = MDPY_CLASS_NAME "-" MDPY_TYPE_3, .format = DRM_FORMAT_XRGB8888, .bytepp = 4, @@ -78,6 +82,12 @@ static const struct mdpy_type { .height = 1080, }, }; + +static struct mdev_type *mdpy_mdev_types[] = { + &mdpy_types[0].type, + &mdpy_types[1].type, + &mdpy_types[2].type, +}; static dev_t mdpy_devt; static struct class *mdpy_class; @@ -219,7 +229,7 @@ static int mdpy_reset(struct mdev_state *mdev_state) static int mdpy_probe(struct mdev_device *mdev) { const struct mdpy_type *type = - &mdpy_types[mdev_get_type_group_id(mdev)]; + container_of(mdev->type, struct mdpy_type, type); struct device *dev = mdev_dev(mdev); struct mdev_state *mdev_state; u32 fbsize; @@ -644,8 +654,7 @@ static const struct attribute_group *mdev_dev_groups[] = { static ssize_t name_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - const struct mdpy_type *type = - &mdpy_types[mtype_get_type_group_id(mtype)]; + struct mdpy_type *type = container_of(mtype, struct mdpy_type, type); return sprintf(buf, "%s\n", type->name); } @@ -654,8 +663,7 @@ static MDEV_TYPE_ATTR_RO(name); static ssize_t description_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - const struct mdpy_type *type = - &mdpy_types[mtype_get_type_group_id(mtype)]; + struct mdpy_type *type = container_of(mtype, struct mdpy_type, type); return sprintf(buf, "virtual display, %dx%d framebuffer\n", type->width, type->height); @@ -677,7 +685,7 @@ static ssize_t device_api_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(device_api); -static struct attribute *mdev_types_attrs[] = { +static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_name.attr, &mdev_type_attr_description.attr, &mdev_type_attr_device_api.attr, @@ -685,28 +693,6 @@ static struct attribute *mdev_types_attrs[] = { NULL, }; -static struct attribute_group mdev_type_group1 = { - .name = MDPY_TYPE_1, - .attrs = mdev_types_attrs, -}; - -static struct attribute_group mdev_type_group2 = { - .name = MDPY_TYPE_2, - .attrs = mdev_types_attrs, -}; - -static struct attribute_group mdev_type_group3 = { - .name = MDPY_TYPE_3, - .attrs = mdev_types_attrs, -}; - -static struct attribute_group *mdev_type_groups[] = { - &mdev_type_group1, - &mdev_type_group2, - &mdev_type_group3, - NULL, -}; - static const struct vfio_device_ops mdpy_dev_ops = { .read = mdpy_read, .write = mdpy_write, @@ -723,7 +709,7 @@ static struct mdev_driver mdpy_driver = { }, .probe = mdpy_probe, .remove = mdpy_remove, - .supported_type_groups = mdev_type_groups, + .types_attrs = mdev_types_attrs, }; static const struct file_operations vd_fops = { @@ -766,7 +752,9 @@ static int __init mdpy_dev_init(void) if (ret) goto err_class; - ret = mdev_register_parent(&mdpy_parent, &mdpy_dev, &mdpy_driver); + ret = mdev_register_parent(&mdpy_parent, &mdpy_dev, &mdpy_driver, + mdpy_mdev_types, + ARRAY_SIZE(mdpy_mdev_types)); if (ret) goto err_device; diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index 8ba5f6084a093..029a19ef8ce7b 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -143,6 +143,20 @@ struct mdev_state { int nr_ports; }; +static struct mtty_type { + struct mdev_type type; + int nr_ports; + const char *name; +} mtty_types[2] = { + { .nr_ports = 1, .type.sysfs_name = "1", .name = "Single port serial" }, + { .nr_ports = 2, .type.sysfs_name = "2", .name = "Dual port serial" }, +}; + +static struct mdev_type *mtty_mdev_types[] = { + &mtty_types[0].type, + &mtty_types[1].type, +}; + static atomic_t mdev_avail_ports = ATOMIC_INIT(MAX_MTTYS); static const struct file_operations vd_fops = { @@ -704,16 +718,18 @@ static ssize_t mdev_access(struct mdev_state *mdev_state, u8 *buf, size_t count, static int mtty_probe(struct mdev_device *mdev) { + struct mtty_type *type = + container_of(mdev->type, struct mtty_type, type); struct mdev_state *mdev_state; - int nr_ports = mdev_get_type_group_id(mdev) + 1; int avail_ports = atomic_read(&mdev_avail_ports); int ret; do { - if (avail_ports < nr_ports) + if (avail_ports < type->nr_ports) return -ENOSPC; } while (!atomic_try_cmpxchg(&mdev_avail_ports, - &avail_ports, avail_ports - nr_ports)); + &avail_ports, + avail_ports - type->nr_ports)); mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL); if (mdev_state == NULL) { @@ -723,13 +739,13 @@ static int mtty_probe(struct mdev_device *mdev) vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mtty_dev_ops); - mdev_state->nr_ports = nr_ports; + mdev_state->nr_ports = type->nr_ports; mdev_state->irq_index = -1; mdev_state->s[0].max_fifo_size = MAX_FIFO_SIZE; mdev_state->s[1].max_fifo_size = MAX_FIFO_SIZE; mutex_init(&mdev_state->rxtx_lock); - mdev_state->vconfig = kzalloc(MTTY_CONFIG_SPACE_SIZE, GFP_KERNEL); + mdev_state->vconfig = kzalloc(MTTY_CONFIG_SPACE_SIZE, GFP_KERNEL); if (mdev_state->vconfig == NULL) { ret = -ENOMEM; goto err_state; @@ -752,7 +768,7 @@ static int mtty_probe(struct mdev_device *mdev) vfio_uninit_group_dev(&mdev_state->vdev); kfree(mdev_state); err_nr_ports: - atomic_add(nr_ports, &mdev_avail_ports); + atomic_add(type->nr_ports, &mdev_avail_ports); return ret; } @@ -1233,11 +1249,9 @@ static const struct attribute_group *mdev_dev_groups[] = { static ssize_t name_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - static const char *name_str[2] = { "Single port serial", - "Dual port serial" }; + struct mtty_type *type = container_of(mtype, struct mtty_type, type); - return sysfs_emit(buf, "%s\n", - name_str[mtype_get_type_group_id(mtype)]); + return sysfs_emit(buf, "%s\n", type->name); } static MDEV_TYPE_ATTR_RO(name); @@ -1246,9 +1260,10 @@ static ssize_t available_instances_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - unsigned int ports = mtype_get_type_group_id(mtype) + 1; + struct mtty_type *type = container_of(mtype, struct mtty_type, type); - return sprintf(buf, "%d\n", atomic_read(&mdev_avail_ports) / ports); + return sprintf(buf, "%d\n", atomic_read(&mdev_avail_ports) / + type->nr_ports); } static MDEV_TYPE_ATTR_RO(available_instances); @@ -1261,29 +1276,13 @@ static ssize_t device_api_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(device_api); -static struct attribute *mdev_types_attrs[] = { +static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_name.attr, &mdev_type_attr_device_api.attr, &mdev_type_attr_available_instances.attr, NULL, }; -static struct attribute_group mdev_type_group1 = { - .name = "1", - .attrs = mdev_types_attrs, -}; - -static struct attribute_group mdev_type_group2 = { - .name = "2", - .attrs = mdev_types_attrs, -}; - -static struct attribute_group *mdev_type_groups[] = { - &mdev_type_group1, - &mdev_type_group2, - NULL, -}; - static const struct vfio_device_ops mtty_dev_ops = { .name = "vfio-mtty", .read = mtty_read, @@ -1300,7 +1299,7 @@ static struct mdev_driver mtty_driver = { }, .probe = mtty_probe, .remove = mtty_remove, - .supported_type_groups = mdev_type_groups, + .types_attrs = mdev_types_attrs, }; static void mtty_device_release(struct device *dev) @@ -1352,7 +1351,8 @@ static int __init mtty_dev_init(void) goto err_class; ret = mdev_register_parent(&mtty_dev.parent, &mtty_dev.dev, - &mtty_driver); + &mtty_driver, mtty_mdev_types, + ARRAY_SIZE(mtty_mdev_types)); if (ret) goto err_device; return 0; From patchwork Tue Jun 14 04:54:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880420 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06CBCC433EF for ; Tue, 14 Jun 2022 04:54:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237441AbiFNEy4 (ORCPT ); Tue, 14 Jun 2022 00:54:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240897AbiFNEyt (ORCPT ); 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Tue, 14 Jun 2022 04:54:41 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org, Jason Gunthorpe , Kevin Tian Subject: [PATCH 04/13] vfio/mdev: remove mdev_{create,remove}_sysfs_files Date: Tue, 14 Jun 2022 06:54:19 +0200 Message-Id: <20220614045428.278494-5-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Just fold these two trivial helpers into their only callers. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian --- drivers/vfio/mdev/mdev_core.c | 12 ++++++++++-- drivers/vfio/mdev/mdev_private.h | 3 --- drivers/vfio/mdev/mdev_sysfs.c | 28 ---------------------------- 3 files changed, 10 insertions(+), 33 deletions(-) diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index 71c7f4e521a74..fe4230b21993d 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -44,7 +44,8 @@ static void mdev_device_remove_common(struct mdev_device *mdev) { struct mdev_parent *parent = mdev->type->parent; - mdev_remove_sysfs_files(mdev); + sysfs_remove_link(&mdev->dev.kobj, "mdev_type"); + sysfs_remove_link(mdev->type->devices_kobj, dev_name(&mdev->dev)); device_del(&mdev->dev); lockdep_assert_held(&parent->unreg_sem); /* Balances with device_initialize() */ @@ -212,16 +213,23 @@ int mdev_device_create(struct mdev_type *type, const guid_t *uuid) if (ret) goto out_del; - ret = mdev_create_sysfs_files(mdev); + ret = sysfs_create_link(type->devices_kobj, &mdev->dev.kobj, + dev_name(&mdev->dev)); if (ret) goto out_del; + ret = sysfs_create_link(&mdev->dev.kobj, &type->kobj, "mdev_type"); + if (ret) + goto out_remove_type_link; + mdev->active = true; dev_dbg(&mdev->dev, "MDEV: created\n"); up_read(&parent->unreg_sem); return 0; +out_remove_type_link: + sysfs_remove_link(mdev->type->devices_kobj, dev_name(&mdev->dev)); out_del: device_del(&mdev->dev); out_unlock: diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h index 6980f504018f3..346b9ec320466 100644 --- a/drivers/vfio/mdev/mdev_private.h +++ b/drivers/vfio/mdev/mdev_private.h @@ -20,9 +20,6 @@ extern const struct attribute_group *mdev_device_groups[]; #define to_mdev_type(_kobj) \ container_of(_kobj, struct mdev_type, kobj) -int mdev_create_sysfs_files(struct mdev_device *mdev); -void mdev_remove_sysfs_files(struct mdev_device *mdev); - int mdev_type_add(struct mdev_parent *parent, struct mdev_type *type); void mdev_type_remove(struct mdev_type *type); diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index 09745e8e120f9..dd81b91afcf7d 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -170,31 +170,3 @@ const struct attribute_group *mdev_device_groups[] = { &mdev_device_group, NULL }; - -int mdev_create_sysfs_files(struct mdev_device *mdev) -{ - struct mdev_type *type = mdev->type; - struct kobject *kobj = &mdev->dev.kobj; - int ret; - - ret = sysfs_create_link(type->devices_kobj, kobj, dev_name(&mdev->dev)); - if (ret) - return ret; - - ret = sysfs_create_link(kobj, &type->kobj, "mdev_type"); - if (ret) - goto type_link_failed; - return ret; - -type_link_failed: - sysfs_remove_link(mdev->type->devices_kobj, dev_name(&mdev->dev)); - return ret; -} - -void mdev_remove_sysfs_files(struct mdev_device *mdev) -{ - struct kobject *kobj = &mdev->dev.kobj; - - sysfs_remove_link(kobj, "mdev_type"); - sysfs_remove_link(mdev->type->devices_kobj, dev_name(&mdev->dev)); -} From patchwork Tue Jun 14 04:54:20 2022 Content-Type: text/plain; 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c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=xVrT4eVcIYRujIwa3JDjYXEZV1LmJHxRXGA2Ss7neX8=; b=sZWhNkQZSA2tufMa8NpcSAzUvE mzv0SxsvkYadS+eSGnAUEf5edN2DYo869XrOWb7FsQ94dkJYX22aoZtIkwAUKkBj8IPH9hw+3TYVv p0owWShjnJYx8ku+CpJE631QyQyhizQbpjwnjaiYucT9XaAkWfopAIe7S8dRpOnYnxdN/warHCSQj KMIYa3Z/MBbbh2+sesgBROc7P+UguObmxQx5D79jeW+lQT/FIxX4n2X+ENusi5ZJFUZKHLKi28uSr Hado4s+Ep7Evv1022J8Hc3x0iJmN2iTM0EBxH7U1RJUCBqzur5yQrCdE2GvUkTa+GjLCCsnDquKpl Oe4JEBlA==; Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZf-0072fF-JX; Tue, 14 Jun 2022 04:54:44 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org, Jason Gunthorpe , Kevin Tian Subject: [PATCH 05/13] vfio/mdev: remove mdev_from_dev Date: Tue, 14 Jun 2022 06:54:20 +0200 Message-Id: <20220614045428.278494-6-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Just open code it in the only caller. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian --- drivers/vfio/mdev/mdev_core.c | 6 ++---- include/linux/mdev.h | 4 ---- 2 files changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index fe4230b21993d..49a4a26787ce6 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -54,10 +54,8 @@ static void mdev_device_remove_common(struct mdev_device *mdev) static int mdev_device_remove_cb(struct device *dev, void *data) { - struct mdev_device *mdev = mdev_from_dev(dev); - - if (mdev) - mdev_device_remove_common(mdev); + if (dev->bus == &mdev_bus_type) + mdev_device_remove_common(to_mdev_device(dev)); return 0; } diff --git a/include/linux/mdev.h b/include/linux/mdev.h index d28ddf0f561a0..409e86d343a05 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -107,9 +107,5 @@ static inline struct device *mdev_dev(struct mdev_device *mdev) { return &mdev->dev; } -static inline struct mdev_device *mdev_from_dev(struct device *dev) -{ - return dev->bus == &mdev_bus_type ? to_mdev_device(dev) : NULL; -} #endif /* MDEV_H */ From patchwork Tue Jun 14 04:54:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880421 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35528CCA47A for ; Tue, 14 Jun 2022 04:54:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230137AbiFNEy6 (ORCPT ); Tue, 14 Jun 2022 00:54:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236980AbiFNEyt (ORCPT ); Tue, 14 Jun 2022 00:54:49 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3906937BD9; Mon, 13 Jun 2022 21:54:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=AZzutnG50lKr2/Ph8sA9sjy9B+4ZEBV2t6fpN+CzXzo=; b=tFnS+0fakga6Q0vQBV8FcxmZ1S L20a7yhIpJRNhm72PBPsx7BUjfNhcudP7srTCbK6lFiWUmshB1rheI+8Vdv3fniwoyz8pKTrR6lIB kufsPG3/6lcShXAS0gUMUsII4DHGgZl3tgxtU7OtBKzrDBRISpOPbFKOKXXZC5/BFjzrqBpmSMP2x vkPcBuLVmgy2nfF8DBPJJul7aQomUipseh6H+W89mkHacMFIehdWPIPMY3l8ondywnc8ZbS3RWTA9 NofO43fGaOZx0CVGBqEo124JT9QEulwvTkH+vaDSO8xhqUtfPdJh6cUxTGUVSEEAA/9sgz+UmJiWA W20kpcjg==; Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZi-0072fj-82; Tue, 14 Jun 2022 04:54:46 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org, Jason Gunthorpe , Kevin Tian Subject: [PATCH 06/13] vfio/mdev: unexport mdev_bus_type Date: Tue, 14 Jun 2022 06:54:21 +0200 Message-Id: <20220614045428.278494-7-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org mdev_bus_type is only used in mdev.ko now, so unexport it. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede --- drivers/vfio/mdev/mdev_driver.c | 1 - drivers/vfio/mdev/mdev_private.h | 1 + include/linux/mdev.h | 2 -- 3 files changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/vfio/mdev/mdev_driver.c b/drivers/vfio/mdev/mdev_driver.c index 1da1ecf76a0d5..5b3c94f4fb13d 100644 --- a/drivers/vfio/mdev/mdev_driver.c +++ b/drivers/vfio/mdev/mdev_driver.c @@ -46,7 +46,6 @@ struct bus_type mdev_bus_type = { .remove = mdev_remove, .match = mdev_match, }; -EXPORT_SYMBOL_GPL(mdev_bus_type); /** * mdev_register_driver - register a new MDEV driver diff --git a/drivers/vfio/mdev/mdev_private.h b/drivers/vfio/mdev/mdev_private.h index 346b9ec320466..62a98b78d929d 100644 --- a/drivers/vfio/mdev/mdev_private.h +++ b/drivers/vfio/mdev/mdev_private.h @@ -13,6 +13,7 @@ int mdev_bus_register(void); void mdev_bus_unregister(void); +extern struct bus_type mdev_bus_type; extern const struct attribute_group *mdev_device_groups[]; #define to_mdev_type_attr(_attr) \ diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 409e86d343a05..dd11c142bf887 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -92,8 +92,6 @@ static inline const guid_t *mdev_uuid(struct mdev_device *mdev) return &mdev->uuid; } -extern struct bus_type mdev_bus_type; - int mdev_register_parent(struct mdev_parent *parent, struct device *dev, struct mdev_driver *mdev_driver, struct mdev_type **types, unsigned int nr_types); From patchwork Tue Jun 14 04:54:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880422 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3AE25C433EF for ; Tue, 14 Jun 2022 04:55:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344069AbiFNEy7 (ORCPT ); Tue, 14 Jun 2022 00:54:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244658AbiFNEyx (ORCPT ); Tue, 14 Jun 2022 00:54:53 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1DAF237BD3; Mon, 13 Jun 2022 21:54:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=J0kYVL6nlYL/lfMrUVbKAG7gBaKcZ6pJXaUTArnsTyM=; b=GyJTGHxnFClQSBabQbbMj1s3pd duzVdcsANwhvm2Qc/vVILaqIOtaEXrMo1a1n00umFYZzPvj1QerLcnFiDy0mz5TJvmvzqaBz7oaRu Xf9eBTUqGcUuapgMWqNpME8QyJ2hdBi9yZkx3dFD8fFnXxDYY2OrPI3iMM9NAzBvsWKjFWitiin4D Ds2iYTY0gZm6H5nBAmrhebet+afIpXehCuUTakwm7Vp2mXnVtgOLbjE/jda1taQPcRf3sWVPN4CP7 F+u8/3xPiDlUkKrUXriWnsxlYOLzgi9M2Yl1tJXg4LK0mJBcqc71PFaSlAw+ibia0NGUcSVx3xUKc jWLrzriA==; Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZk-0072gT-T8; Tue, 14 Jun 2022 04:54:49 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org, Jason Gunthorpe , Kevin Tian Subject: [PATCH 07/13] vfio/mdev: remove mdev_parent_dev Date: Tue, 14 Jun 2022 06:54:22 +0200 Message-Id: <20220614045428.278494-8-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Just open code the dereferences in the only user. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede --- Documentation/driver-api/vfio-mediated-device.rst | 3 --- drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +- drivers/vfio/mdev/mdev_core.c | 6 ------ include/linux/mdev.h | 1 - 4 files changed, 1 insertion(+), 11 deletions(-) diff --git a/Documentation/driver-api/vfio-mediated-device.rst b/Documentation/driver-api/vfio-mediated-device.rst index 599008bdc1dcb..27247b3bdcb57 100644 --- a/Documentation/driver-api/vfio-mediated-device.rst +++ b/Documentation/driver-api/vfio-mediated-device.rst @@ -202,9 +202,6 @@ Directories and files under the sysfs for Each Physical Device sprintf(buf, "%s-%s", dev_driver_string(parent->dev), group->name); - (or using mdev_parent_dev(mdev) to arrive at the parent device outside - of the core mdev code) - * device_api This attribute should show which device API is being created, for example, diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 1c6b7e8bec4fb..136f9c0df48b9 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -1549,7 +1549,7 @@ static const struct vfio_device_ops intel_vgpu_dev_ops = { static int intel_vgpu_probe(struct mdev_device *mdev) { - struct device *pdev = mdev_parent_dev(mdev); + struct device *pdev = mdev->type->parent->dev; struct intel_gvt *gvt = kdev_to_i915(pdev)->gvt; struct intel_vgpu_type *type = container_of(mdev->type, struct intel_vgpu_type, type); diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index 49a4a26787ce6..479ae5ed6c392 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -23,12 +23,6 @@ static struct class_compat *mdev_bus_compat_class; static LIST_HEAD(mdev_list); static DEFINE_MUTEX(mdev_list_lock); -struct device *mdev_parent_dev(struct mdev_device *mdev) -{ - return mdev->type->parent->dev; -} -EXPORT_SYMBOL(mdev_parent_dev); - /* * Used in mdev_type_attribute sysfs functions to return the parent struct * device diff --git a/include/linux/mdev.h b/include/linux/mdev.h index dd11c142bf887..83c85a0247f25 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -100,7 +100,6 @@ void mdev_unregister_parent(struct mdev_parent *parent); int mdev_register_driver(struct mdev_driver *drv); void mdev_unregister_driver(struct mdev_driver *drv); -struct device *mdev_parent_dev(struct mdev_device *mdev); static inline struct device *mdev_dev(struct mdev_device *mdev) { return &mdev->dev; From patchwork Tue Jun 14 04:54:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880423 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AAC31C433EF for ; Tue, 14 Jun 2022 04:55:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347314AbiFNEzA (ORCPT ); Tue, 14 Jun 2022 00:55:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344415AbiFNEyz (ORCPT ); Tue, 14 Jun 2022 00:54:55 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF56E37BDC; Mon, 13 Jun 2022 21:54:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=yWgwBd01q1i40kokmt0dpMTuHq9q3ZmdNDZ448P4wTM=; b=TvyqgNSyF/EXJ689dgOYVovPO7 ASMD/bSmT4Rr2TzxnRa2Rq3U9jIabnOphDZGcY7COYygRTM+1QrHCURcfqXk2eW2Zu/rvOt08xW7z 4ouNBYulMEYoxAHHq798m6SGtxoM4++Elt0owbRerLMgQEUoTkoQN32zZbv7+SedY8tDQPazFJI/o JWGnURIVDy1fzWY7libLzTLXcFwLUJb9syvHtZCuYkOzI7mji1Xg77HmiXeotALsAlEQwdxB5Inq3 5MTZYX3NsP3LtnKPjRTRz94DazDX2H93Yy1SIcYnml1mggTav1zSryaeLwwi3//Jq93XqH/9RDFiF XkN5iFAA==; Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZn-0072hb-JD; Tue, 14 Jun 2022 04:54:52 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org, Jason Gunthorpe , Kevin Tian Subject: [PATCH 08/13] vfio/mdev: remove mtype_get_parent_dev Date: Tue, 14 Jun 2022 06:54:23 +0200 Message-Id: <20220614045428.278494-9-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Just open code the dereferences in the only user. Signed-off-by: Christoph Hellwig Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede --- drivers/s390/cio/vfio_ccw_ops.c | 3 +-- drivers/vfio/mdev/mdev_core.c | 10 ---------- include/linux/mdev.h | 2 -- 3 files changed, 1 insertion(+), 14 deletions(-) diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 25b8d42a522ac..43d53736dfe3c 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -88,8 +88,7 @@ static ssize_t available_instances_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { - struct vfio_ccw_private *private = - dev_get_drvdata(mtype_get_parent_dev(mtype)); + struct vfio_ccw_private *private = dev_get_drvdata(mtype->parent->dev); return sprintf(buf, "%d\n", atomic_read(&private->avail)); } diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index 479ae5ed6c392..20513b7f6b5eb 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -23,16 +23,6 @@ static struct class_compat *mdev_bus_compat_class; static LIST_HEAD(mdev_list); static DEFINE_MUTEX(mdev_list_lock); -/* - * Used in mdev_type_attribute sysfs functions to return the parent struct - * device - */ -struct device *mtype_get_parent_dev(struct mdev_type *mtype) -{ - return mtype->parent->dev; -} -EXPORT_SYMBOL(mtype_get_parent_dev); - /* Caller must hold parent unreg_sem read or write lock */ static void mdev_device_remove_common(struct mdev_device *mdev) { diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 83c85a0247f25..ecf964d34f2ca 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -51,8 +51,6 @@ static inline struct mdev_device *to_mdev_device(struct device *dev) return container_of(dev, struct mdev_device, dev); } -struct device *mtype_get_parent_dev(struct mdev_type *mtype); - /* interface for exporting mdev supported type attributes */ struct mdev_type_attribute { struct attribute attr; From patchwork Tue Jun 14 04:54:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880424 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7CE55C433EF for ; Tue, 14 Jun 2022 04:55:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347000AbiFNEzG (ORCPT ); Tue, 14 Jun 2022 00:55:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39290 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346516AbiFNEzD (ORCPT ); Tue, 14 Jun 2022 00:55:03 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E8383818D; Mon, 13 Jun 2022 21:54:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=Gosfzp1rPq1AOk+1TDJ6YHbsUNyGrQkghUe8iW180UQ=; b=S/X/eOaYKqP+B5lBRy5BKi1rEx +sE5uOVTRtsdTLXTVBImxxh/aJNZqrFWcBrD4Xw6s4F6wtRZw40Snq7ClJf3JWv2RcrcIzeR7DPj5 SfMH5WNiJj0pyDOqfcfX8LZPCJ/gnrVjQ59dKJZ8YvwV3ev5qHUwUy2a2QSrf7zipk41z2SIVMS46 INoAlZn6QokWmX7KbRD6w01ccEH8ZWn77LOonp4oWhV64x1Ohqs9tHWUpyDa9WSmyHQdvfGm5uV3L FuXd+7wxmsW3udP70BLSQfnr1UFZ9hFnfkDFCfTRNdchTPF1EbEQQrIF38OwbZGHrZfHKiwaVflI4 XHSlOqlA==; Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZq-0072ic-Bb; Tue, 14 Jun 2022 04:54:55 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org, Jason Gunthorpe Subject: [PATCH 09/13] vfio/mdev: consolidate all the device_api sysfs into the core code Date: Tue, 14 Jun 2022 06:54:24 +0200 Message-Id: <20220614045428.278494-10-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Jason Gunthorpe Every driver just emits a static string, simply feed it through the ops and provide a standard sysfs show function. Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian , with one nit: Reviewed-by: Kirti Wankhede --- .../driver-api/vfio-mediated-device.rst | 2 +- drivers/gpu/drm/i915/gvt/kvmgt.c | 9 +---- drivers/s390/cio/vfio_ccw_ops.c | 11 ++---- drivers/s390/crypto/vfio_ap_ops.c | 10 +----- drivers/vfio/mdev/mdev_driver.c | 4 ++- drivers/vfio/mdev/mdev_sysfs.c | 35 +++++++++++++------ include/linux/mdev.h | 7 ++-- samples/vfio-mdev/mbochs.c | 9 +---- samples/vfio-mdev/mdpy.c | 9 +---- samples/vfio-mdev/mtty.c | 10 +----- 10 files changed, 38 insertions(+), 68 deletions(-) diff --git a/Documentation/driver-api/vfio-mediated-device.rst b/Documentation/driver-api/vfio-mediated-device.rst index 27247b3bdcb57..e9913bfb4393b 100644 --- a/Documentation/driver-api/vfio-mediated-device.rst +++ b/Documentation/driver-api/vfio-mediated-device.rst @@ -204,7 +204,7 @@ Directories and files under the sysfs for Each Physical Device * device_api - This attribute should show which device API is being created, for example, + This attribute shows which device API is being created, for example, "vfio-pci" for a PCI device. * available_instances diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 136f9c0df48b9..44a418d897377 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -123,12 +123,6 @@ static ssize_t available_instances_show(struct mdev_type *mtype, return sprintf(buf, "%u\n", type->avail_instance); } -static ssize_t device_api_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING); -} - static ssize_t description_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { @@ -151,13 +145,11 @@ static ssize_t name_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(available_instances); -static MDEV_TYPE_ATTR_RO(device_api); static MDEV_TYPE_ATTR_RO(description); static MDEV_TYPE_ATTR_RO(name); static const struct attribute *gvt_type_attrs[] = { &mdev_type_attr_available_instances.attr, - &mdev_type_attr_device_api.attr, &mdev_type_attr_description.attr, &mdev_type_attr_name.attr, NULL, @@ -1587,6 +1579,7 @@ static void intel_vgpu_remove(struct mdev_device *mdev) } static struct mdev_driver intel_vgpu_mdev_driver = { + .device_api = VFIO_DEVICE_API_PCI_STRING, .driver = { .name = "intel_vgpu_mdev", .owner = THIS_MODULE, diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 43d53736dfe3c..730d87a96a305 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -77,13 +77,6 @@ static ssize_t name_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(name); -static ssize_t device_api_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_DEVICE_API_CCW_STRING); -} -static MDEV_TYPE_ATTR_RO(device_api); - static ssize_t available_instances_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) @@ -96,7 +89,6 @@ static MDEV_TYPE_ATTR_RO(available_instances); static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_name.attr, - &mdev_type_attr_device_api.attr, &mdev_type_attr_available_instances.attr, NULL, }; @@ -636,6 +628,7 @@ static const struct vfio_device_ops vfio_ccw_dev_ops = { }; struct mdev_driver vfio_ccw_mdev_driver = { + .device_api = VFIO_DEVICE_API_CCW_STRING, .driver = { .name = "vfio_ccw_mdev", .owner = THIS_MODULE, @@ -648,7 +641,7 @@ struct mdev_driver vfio_ccw_mdev_driver = { int vfio_ccw_mdev_reg(struct subchannel *sch) { - sprintf(sch->mdev_type.sysfs_name, "io"); + strcat(sch->mdev_type.sysfs_name, "io"); sch->mdev_types[0] = &sch->mdev_type; return mdev_register_parent(&sch->parent, &sch->dev, &vfio_ccw_mdev_driver, sch->mdev_types, diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index ff25858b2ebbe..da21fd60877fb 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -529,17 +529,8 @@ static ssize_t available_instances_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(available_instances); -static ssize_t device_api_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_DEVICE_API_AP_STRING); -} - -static MDEV_TYPE_ATTR_RO(device_api); - static const struct attribute *vfio_ap_mdev_type_attrs[] = { &mdev_type_attr_name.attr, - &mdev_type_attr_device_api.attr, &mdev_type_attr_available_instances.attr, NULL, }; @@ -1454,6 +1445,7 @@ static const struct vfio_device_ops vfio_ap_matrix_dev_ops = { }; static struct mdev_driver vfio_ap_matrix_driver = { + .device_api = VFIO_DEVICE_API_AP_STRING, .driver = { .name = "vfio_ap_mdev", .owner = THIS_MODULE, diff --git a/drivers/vfio/mdev/mdev_driver.c b/drivers/vfio/mdev/mdev_driver.c index 5b3c94f4fb13d..60e8b9f6474e8 100644 --- a/drivers/vfio/mdev/mdev_driver.c +++ b/drivers/vfio/mdev/mdev_driver.c @@ -55,8 +55,10 @@ struct bus_type mdev_bus_type = { **/ int mdev_register_driver(struct mdev_driver *drv) { - if (!drv->types_attrs) + if (!drv->types_attrs || !drv->device_api) return -EINVAL; + + /* initialize common driver fields */ drv->driver.bus = &mdev_bus_type; return driver_register(&drv->driver); } diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index dd81b91afcf7d..20763f1aa9f5a 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -72,9 +72,30 @@ static ssize_t create_store(struct mdev_type *mtype, return count; } - static MDEV_TYPE_ATTR_WO(create); +static ssize_t device_api_show(struct mdev_type *mtype, + struct mdev_type_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%s\n", mtype->parent->mdev_driver->device_api); +} +static MDEV_TYPE_ATTR_RO(device_api); + +static struct attribute *mdev_types_core_attrs[] = { + &mdev_type_attr_create.attr, + &mdev_type_attr_device_api.attr, + NULL, +}; + +static struct attribute_group mdev_type_core_group = { + .attrs = mdev_types_core_attrs, +}; + +static const struct attribute_group *mdev_type_groups[] = { + &mdev_type_core_group, + NULL, +}; + static void mdev_type_release(struct kobject *kobj) { struct mdev_type *type = to_mdev_type(kobj); @@ -84,8 +105,9 @@ static void mdev_type_release(struct kobject *kobj) } static struct kobj_type mdev_type_ktype = { - .sysfs_ops = &mdev_type_sysfs_ops, - .release = mdev_type_release, + .sysfs_ops = &mdev_type_sysfs_ops, + .release = mdev_type_release, + .default_groups = mdev_type_groups, }; int mdev_type_add(struct mdev_parent *parent, struct mdev_type *type) @@ -100,10 +122,6 @@ int mdev_type_add(struct mdev_parent *parent, struct mdev_type *type) if (ret) return ret; - ret = sysfs_create_file(&type->kobj, &mdev_type_attr_create.attr); - if (ret) - goto attr_create_failed; - type->devices_kobj = kobject_create_and_add("devices", &type->kobj); if (!type->devices_kobj) { ret = -ENOMEM; @@ -118,8 +136,6 @@ int mdev_type_add(struct mdev_parent *parent, struct mdev_type *type) attrs_failed: kobject_put(type->devices_kobj); attr_devices_failed: - sysfs_remove_file(&type->kobj, &mdev_type_attr_create.attr); -attr_create_failed: kobject_del(&type->kobj); kobject_put(&type->kobj); return ret; @@ -130,7 +146,6 @@ void mdev_type_remove(struct mdev_type *type) sysfs_remove_files(&type->kobj, type->parent->mdev_driver->types_attrs); kobject_put(type->devices_kobj); - sysfs_remove_file(&type->kobj, &mdev_type_attr_create.attr); kobject_del(&type->kobj); kobject_put(&type->kobj); } diff --git a/include/linux/mdev.h b/include/linux/mdev.h index ecf964d34f2ca..81e11e18b3e41 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -61,11 +61,6 @@ struct mdev_type_attribute { size_t count); }; -#define MDEV_TYPE_ATTR(_name, _mode, _show, _store) \ -struct mdev_type_attribute mdev_type_attr_##_name = \ - __ATTR(_name, _mode, _show, _store) -#define MDEV_TYPE_ATTR_RW(_name) \ - struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RW(_name) #define MDEV_TYPE_ATTR_RO(_name) \ struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RO(_name) #define MDEV_TYPE_ATTR_WO(_name) \ @@ -73,12 +68,14 @@ struct mdev_type_attribute mdev_type_attr_##_name = \ /** * struct mdev_driver - Mediated device driver + * @device_api: String to return for the device_api sysfs * @probe: called when new device created * @remove: called when device removed * @types_attrs: attributes to the type kobjects. * @driver: device driver structure **/ struct mdev_driver { + const char *device_api; int (*probe)(struct mdev_device *dev); void (*remove)(struct mdev_device *dev); const struct attribute * const *types_attrs; diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index 1069f561cb012..199846f01de92 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -1367,17 +1367,9 @@ static ssize_t available_instances_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(available_instances); -static ssize_t device_api_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING); -} -static MDEV_TYPE_ATTR_RO(device_api); - static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_name.attr, &mdev_type_attr_description.attr, - &mdev_type_attr_device_api.attr, &mdev_type_attr_available_instances.attr, NULL, }; @@ -1391,6 +1383,7 @@ static const struct vfio_device_ops mbochs_dev_ops = { }; static struct mdev_driver mbochs_driver = { + .device_api = VFIO_DEVICE_API_PCI_STRING, .driver = { .name = "mbochs", .owner = THIS_MODULE, diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index 40b1c8a58157c..401a9a622673c 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -678,17 +678,9 @@ static ssize_t available_instances_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(available_instances); -static ssize_t device_api_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING); -} -static MDEV_TYPE_ATTR_RO(device_api); - static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_name.attr, &mdev_type_attr_description.attr, - &mdev_type_attr_device_api.attr, &mdev_type_attr_available_instances.attr, NULL, }; @@ -701,6 +693,7 @@ static const struct vfio_device_ops mdpy_dev_ops = { }; static struct mdev_driver mdpy_driver = { + .device_api = VFIO_DEVICE_API_PCI_STRING, .driver = { .name = "mdpy", .owner = THIS_MODULE, diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index 029a19ef8ce7b..2a470424628af 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -1268,17 +1268,8 @@ static ssize_t available_instances_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(available_instances); -static ssize_t device_api_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING); -} - -static MDEV_TYPE_ATTR_RO(device_api); - static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_name.attr, - &mdev_type_attr_device_api.attr, &mdev_type_attr_available_instances.attr, NULL, }; @@ -1291,6 +1282,7 @@ static const struct vfio_device_ops mtty_dev_ops = { }; static struct mdev_driver mtty_driver = { + .device_api = VFIO_DEVICE_API_PCI_STRING, .driver = { .name = "mtty", .owner = THIS_MODULE, From patchwork Tue Jun 14 04:54:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880425 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C25FEC433EF for ; Tue, 14 Jun 2022 04:55:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234540AbiFNEzI (ORCPT ); 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Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZt-0072j6-6B; Tue, 14 Jun 2022 04:54:57 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org Subject: [PATCH 10/13] vfio/mdev: consolidate all the name sysfs into the core code Date: Tue, 14 Jun 2022 06:54:25 +0200 Message-Id: <20220614045428.278494-11-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Every driver just emits a static string, simply add a field to the mdev_type for the driver to fill out or fall back to the sysfs name and provide a standard sysfs show function. Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede Reviewed-by: Jason Gunthorpe --- .../driver-api/vfio-mediated-device.rst | 2 +- drivers/gpu/drm/i915/gvt/kvmgt.c | 8 ------- drivers/s390/cio/vfio_ccw_ops.c | 9 +------- drivers/s390/crypto/vfio_ap_ops.c | 9 -------- drivers/vfio/mdev/mdev_sysfs.c | 11 ++++++++++ include/linux/mdev.h | 1 + samples/vfio-mdev/mbochs.c | 20 ++++-------------- samples/vfio-mdev/mdpy.c | 21 +++++-------------- samples/vfio-mdev/mtty.c | 18 ++++------------ 9 files changed, 27 insertions(+), 72 deletions(-) diff --git a/Documentation/driver-api/vfio-mediated-device.rst b/Documentation/driver-api/vfio-mediated-device.rst index e9913bfb4393b..87d207744db79 100644 --- a/Documentation/driver-api/vfio-mediated-device.rst +++ b/Documentation/driver-api/vfio-mediated-device.rst @@ -219,7 +219,7 @@ Directories and files under the sysfs for Each Physical Device * name - This attribute should show human readable name. This is optional attribute. + This attribute shows a human readable name. * description diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 44a418d897377..191e64ef70acf 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -138,20 +138,12 @@ static ssize_t description_show(struct mdev_type *mtype, type->weight); } -static ssize_t name_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", mtype->sysfs_name); -} - static MDEV_TYPE_ATTR_RO(available_instances); static MDEV_TYPE_ATTR_RO(description); -static MDEV_TYPE_ATTR_RO(name); static const struct attribute *gvt_type_attrs[] = { &mdev_type_attr_available_instances.attr, &mdev_type_attr_description.attr, - &mdev_type_attr_name.attr, NULL, }; diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 730d87a96a305..35389f4b67dc5 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -70,13 +70,6 @@ static int vfio_ccw_mdev_notifier(struct notifier_block *nb, return NOTIFY_DONE; } -static ssize_t name_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "I/O subchannel (Non-QDIO)\n"); -} -static MDEV_TYPE_ATTR_RO(name); - static ssize_t available_instances_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) @@ -88,7 +81,6 @@ static ssize_t available_instances_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(available_instances); static const struct attribute *mdev_types_attrs[] = { - &mdev_type_attr_name.attr, &mdev_type_attr_available_instances.attr, NULL, }; @@ -642,6 +634,7 @@ struct mdev_driver vfio_ccw_mdev_driver = { int vfio_ccw_mdev_reg(struct subchannel *sch) { strcat(sch->mdev_type.sysfs_name, "io"); + strcat(sch->mdev_type.pretty_name, "I/O subchannel (Non-QDIO)"); sch->mdev_types[0] = &sch->mdev_type; return mdev_register_parent(&sch->parent, &sch->dev, &vfio_ccw_mdev_driver, sch->mdev_types, diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index da21fd60877fb..d6b2e819a615e 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -511,14 +511,6 @@ static void vfio_ap_mdev_remove(struct mdev_device *mdev) atomic_inc(&matrix_dev->available_instances); } -static ssize_t name_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - return sprintf(buf, "%s\n", VFIO_AP_MDEV_NAME_HWVIRT); -} - -static MDEV_TYPE_ATTR_RO(name); - static ssize_t available_instances_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) @@ -530,7 +522,6 @@ static ssize_t available_instances_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(available_instances); static const struct attribute *vfio_ap_mdev_type_attrs[] = { - &mdev_type_attr_name.attr, &mdev_type_attr_available_instances.attr, NULL, }; diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index 20763f1aa9f5a..8384e2992c706 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -81,9 +81,20 @@ static ssize_t device_api_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(device_api); +static ssize_t name_show(struct mdev_type *mtype, + struct mdev_type_attribute *attr, char *buf) +{ + if (!mtype->pretty_name[0]) + return sprintf(buf, "%s\n", mtype->sysfs_name); + return sprintf(buf, "%s\n", mtype->pretty_name); +} + +static MDEV_TYPE_ATTR_RO(name); + static struct attribute *mdev_types_core_attrs[] = { &mdev_type_attr_create.attr, &mdev_type_attr_device_api.attr, + &mdev_type_attr_name.attr, NULL, }; diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 81e11e18b3e41..64ca2ba806ed3 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -26,6 +26,7 @@ struct mdev_device { struct mdev_type { /* set by the driver before calling mdev_register parent: */ char sysfs_name[32]; + char pretty_name[32]; /* optional */ /* set by the core, can be used drivers */ struct mdev_parent *parent; diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index 199846f01de92..c8271168a96ad 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -101,26 +101,25 @@ MODULE_PARM_DESC(mem, "megabytes available to " MBOCHS_NAME " devices"); static struct mbochs_type { struct mdev_type type; - const char *name; u32 mbytes; u32 max_x; u32 max_y; } mbochs_types[] = { { .type.sysfs_name = MBOCHS_TYPE_1, - .name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_1, + .type.pretty_name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_1, .mbytes = 4, .max_x = 800, .max_y = 600, }, { .type.sysfs_name = MBOCHS_TYPE_2, - .name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_2, + .type.pretty_name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_2, .mbytes = 16, .max_x = 1920, .max_y = 1440, }, { .type.sysfs_name = MBOCHS_TYPE_3, - .name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_3, + .type.pretty_name = MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_3, .mbytes = 64, .max_x = 0, .max_y = 0, @@ -547,7 +546,7 @@ static int mbochs_probe(struct mdev_device *mdev) goto err_mem; dev_info(dev, "%s: %s, %d MB, %ld pages\n", __func__, - type->name, type->mbytes, mdev_state->pagecount); + type->type.pretty_name, type->mbytes, mdev_state->pagecount); mutex_init(&mdev_state->ops_lock); mdev_state->mdev = mdev; @@ -1334,16 +1333,6 @@ static const struct attribute_group *mdev_dev_groups[] = { NULL, }; -static ssize_t name_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - struct mbochs_type *type = - container_of(mtype, struct mbochs_type, type); - - return sprintf(buf, "%s\n", type->name); -} -static MDEV_TYPE_ATTR_RO(name); - static ssize_t description_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { @@ -1368,7 +1357,6 @@ static ssize_t available_instances_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(available_instances); static const struct attribute *mdev_types_attrs[] = { - &mdev_type_attr_name.attr, &mdev_type_attr_description.attr, &mdev_type_attr_available_instances.attr, NULL, diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index 401a9a622673c..1b2117772192f 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -53,7 +53,6 @@ MODULE_PARM_DESC(count, "number of " MDPY_NAME " devices"); static struct mdpy_type { struct mdev_type type; - const char *name; u32 format; u32 bytepp; u32 width; @@ -61,21 +60,21 @@ static struct mdpy_type { } mdpy_types[] = { { .type.sysfs_name = MDPY_TYPE_1, - .name = MDPY_CLASS_NAME "-" MDPY_TYPE_1, + .type.pretty_name = MDPY_CLASS_NAME "-" MDPY_TYPE_1, .format = DRM_FORMAT_XRGB8888, .bytepp = 4, .width = 640, .height = 480, }, { .type.sysfs_name = MDPY_TYPE_2, - .name = MDPY_CLASS_NAME "-" MDPY_TYPE_2, + .type.pretty_name = MDPY_CLASS_NAME "-" MDPY_TYPE_2, .format = DRM_FORMAT_XRGB8888, .bytepp = 4, .width = 1024, .height = 768, }, { .type.sysfs_name = MDPY_TYPE_3, - .name = MDPY_CLASS_NAME "-" MDPY_TYPE_3, + .type.pretty_name = MDPY_CLASS_NAME "-" MDPY_TYPE_3, .format = DRM_FORMAT_XRGB8888, .bytepp = 4, .width = 1920, @@ -256,8 +255,8 @@ static int mdpy_probe(struct mdev_device *mdev) ret = -ENOMEM; goto err_vconfig; } - dev_info(dev, "%s: %s (%dx%d)\n", __func__, type->name, type->width, - type->height); + dev_info(dev, "%s: %s (%dx%d)\n", __func__, type->type.pretty_name, + type->width, type->height); mutex_init(&mdev_state->ops_lock); mdev_state->mdev = mdev; @@ -651,15 +650,6 @@ static const struct attribute_group *mdev_dev_groups[] = { NULL, }; -static ssize_t name_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - struct mdpy_type *type = container_of(mtype, struct mdpy_type, type); - - return sprintf(buf, "%s\n", type->name); -} -static MDEV_TYPE_ATTR_RO(name); - static ssize_t description_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { @@ -679,7 +669,6 @@ static ssize_t available_instances_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(available_instances); static const struct attribute *mdev_types_attrs[] = { - &mdev_type_attr_name.attr, &mdev_type_attr_description.attr, &mdev_type_attr_available_instances.attr, NULL, diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index 2a470424628af..b95a4491265c5 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -146,10 +146,11 @@ struct mdev_state { static struct mtty_type { struct mdev_type type; int nr_ports; - const char *name; } mtty_types[2] = { - { .nr_ports = 1, .type.sysfs_name = "1", .name = "Single port serial" }, - { .nr_ports = 2, .type.sysfs_name = "2", .name = "Dual port serial" }, + { .nr_ports = 1, .type.sysfs_name = "1", + .type.pretty_name = "Single port serial" }, + { .nr_ports = 2, .type.sysfs_name = "2", + .type.pretty_name = "Dual port serial" }, }; static struct mdev_type *mtty_mdev_types[] = { @@ -1246,16 +1247,6 @@ static const struct attribute_group *mdev_dev_groups[] = { NULL, }; -static ssize_t name_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) -{ - struct mtty_type *type = container_of(mtype, struct mtty_type, type); - - return sysfs_emit(buf, "%s\n", type->name); -} - -static MDEV_TYPE_ATTR_RO(name); - static ssize_t available_instances_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) @@ -1269,7 +1260,6 @@ static ssize_t available_instances_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(available_instances); static const struct attribute *mdev_types_attrs[] = { - &mdev_type_attr_name.attr, &mdev_type_attr_available_instances.attr, NULL, }; From patchwork Tue Jun 14 04:54:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880426 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA042C433EF for ; Tue, 14 Jun 2022 04:55:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348887AbiFNEzQ (ORCPT ); Tue, 14 Jun 2022 00:55:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348197AbiFNEzK (ORCPT ); Tue, 14 Jun 2022 00:55:10 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D52CE3878D; Mon, 13 Jun 2022 21:55:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=FPOK6Mf7VGixL+x/yGX567IRfH/WSQ6JcH0Hv7RkqA4=; b=sFSfglsTTUsIUT3VEe2BY0mj7n WKZfw9Xf2hBHgddD7BKGY05Hj1Vk80/TspzPCBiYm6ebH8XgKxd6KXDymvZyzUVVHp+mM2M1OA+br /s8M/I68nSLbQZmfwmyEk3/sMimdG4DyLWlItbpsx676Y++r477iSXe+AhfLU1xb3fHDUg29xlVpY ZF3LrxMdenz+yzvn1hLDE1T8H4xorjgbtCJK8vRa3t4ZgH7t1zSE08UTh6lKhnTxJOEwPrgimUKTD KUb0HCV3tyW3hiioYpALuq/Ht/N289nGOTgsEX+yPmrnLmDpcovceF14gM8c4V6cE0nJK8I21spnq e4XeCPZA==; Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZv-0072jt-S3; Tue, 14 Jun 2022 04:55:00 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org Subject: [PATCH 11/13] vfio/mdev: consolidate all the available_instance sysfs into the core code Date: Tue, 14 Jun 2022 06:54:26 +0200 Message-Id: <20220614045428.278494-12-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Every driver just print a number, simply add a method to the mdev_driver to return it and provide a standard sysfs show function. Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian Reviewed-by: Kirti Wankhede Reviewed-by: Jason Gunthorpe --- .../driver-api/vfio-mediated-device.rst | 3 +- drivers/gpu/drm/i915/gvt/gvt.h | 1 - drivers/gpu/drm/i915/gvt/kvmgt.c | 34 +++++++++----- drivers/gpu/drm/i915/gvt/vgpu.c | 44 ++----------------- drivers/s390/cio/vfio_ccw_ops.c | 14 ++---- drivers/s390/crypto/vfio_ap_ops.c | 16 ++----- drivers/vfio/mdev/mdev_sysfs.c | 11 +++++ include/linux/mdev.h | 2 + samples/vfio-mdev/mbochs.c | 10 ++--- samples/vfio-mdev/mdpy.c | 9 ++-- samples/vfio-mdev/mtty.c | 16 ++----- 11 files changed, 55 insertions(+), 105 deletions(-) diff --git a/Documentation/driver-api/vfio-mediated-device.rst b/Documentation/driver-api/vfio-mediated-device.rst index 87d207744db79..96b789f569c5a 100644 --- a/Documentation/driver-api/vfio-mediated-device.rst +++ b/Documentation/driver-api/vfio-mediated-device.rst @@ -105,6 +105,7 @@ structure to represent a mediated device's driver:: struct mdev_driver { int (*probe) (struct mdev_device *dev); void (*remove) (struct mdev_device *dev); + unsigned int (*get_available)(struct mdev_type *mtype); const struct attribute * const *types_attrs; struct device_driver driver; }; @@ -209,7 +210,7 @@ Directories and files under the sysfs for Each Physical Device * available_instances - This attribute should show the number of devices of type that can be + This attribute shows the number of devices of type that can be created. * [device] diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h index 0ccb9bb7180cd..91d1da18bdf40 100644 --- a/drivers/gpu/drm/i915/gvt/gvt.h +++ b/drivers/gpu/drm/i915/gvt/gvt.h @@ -299,7 +299,6 @@ struct intel_gvt_firmware { #define NR_MAX_INTEL_VGPU_TYPES 20 struct intel_vgpu_type { struct mdev_type type; - unsigned int avail_instance; unsigned int low_gm_size; unsigned int high_gm_size; unsigned int fence; diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 191e64ef70acf..0e14bf94534c4 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -113,16 +113,6 @@ static void kvmgt_page_track_flush_slot(struct kvm *kvm, struct kvm_memory_slot *slot, struct kvm_page_track_notifier_node *node); -static ssize_t available_instances_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, - char *buf) -{ - struct intel_vgpu_type *type = - container_of(mtype, struct intel_vgpu_type, type); - - return sprintf(buf, "%u\n", type->avail_instance); -} - static ssize_t description_show(struct mdev_type *mtype, struct mdev_type_attribute *attr, char *buf) { @@ -138,11 +128,9 @@ static ssize_t description_show(struct mdev_type *mtype, type->weight); } -static MDEV_TYPE_ATTR_RO(available_instances); static MDEV_TYPE_ATTR_RO(description); static const struct attribute *gvt_type_attrs[] = { - &mdev_type_attr_available_instances.attr, &mdev_type_attr_description.attr, NULL, }; @@ -1570,6 +1558,27 @@ static void intel_vgpu_remove(struct mdev_device *mdev) intel_gvt_destroy_vgpu(vgpu); } +static unsigned int intel_vgpu_get_available(struct mdev_type *mtype) +{ + struct intel_vgpu_type *type = + container_of(mtype, struct intel_vgpu_type, type); + struct intel_gvt *gvt = kdev_to_i915(mtype->parent->dev)->gvt; + unsigned int low_gm_avail, high_gm_avail, fence_avail; + + mutex_lock(&gvt->lock); + low_gm_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE - + gvt->gm.vgpu_allocated_low_gm_size; + high_gm_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE - + gvt->gm.vgpu_allocated_high_gm_size; + fence_avail = gvt_fence_sz(gvt) - HOST_FENCE - + gvt->fence.vgpu_allocated_fence_num; + mutex_unlock(&gvt->lock); + + return min3(low_gm_avail / type->low_gm_size, + high_gm_avail / type->high_gm_size, + fence_avail / type->fence); +} + static struct mdev_driver intel_vgpu_mdev_driver = { .device_api = VFIO_DEVICE_API_PCI_STRING, .driver = { @@ -1579,6 +1588,7 @@ static struct mdev_driver intel_vgpu_mdev_driver = { }, .probe = intel_vgpu_probe, .remove = intel_vgpu_remove, + .get_available = intel_vgpu_get_available, .types_attrs = gvt_type_attrs, }; diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c index 2f38b90ecb8ac..dc9f6b4d11e5d 100644 --- a/drivers/gpu/drm/i915/gvt/vgpu.c +++ b/drivers/gpu/drm/i915/gvt/vgpu.c @@ -153,8 +153,6 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) gvt->types[i].weight = vgpu_types[i].weight; gvt->types[i].resolution = vgpu_types[i].edid; - gvt->types[i].avail_instance = min(low_avail / vgpu_types[i].low_mm, - high_avail / vgpu_types[i].high_mm); if (GRAPHICS_VER(gvt->gt->i915) == 8) sprintf(gvt->types[i].type.sysfs_name, "GVTg_V4_%s", @@ -165,7 +163,8 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u weight %u res %s\n", i, gvt->types[i].type.sysfs_name, - gvt->types[i].avail_instance, + min(low_avail / vgpu_types[i].low_mm, + high_avail / vgpu_types[i].high_mm), gvt->types[i].low_gm_size, gvt->types[i].high_gm_size, gvt->types[i].fence, gvt->types[i].weight, @@ -184,36 +183,6 @@ void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt) kfree(gvt->types); } -static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt) -{ - int i; - unsigned int low_gm_avail, high_gm_avail, fence_avail; - unsigned int low_gm_min, high_gm_min, fence_min; - - /* Need to depend on maxium hw resource size but keep on - * static config for now. - */ - low_gm_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE - - gvt->gm.vgpu_allocated_low_gm_size; - high_gm_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE - - gvt->gm.vgpu_allocated_high_gm_size; - fence_avail = gvt_fence_sz(gvt) - HOST_FENCE - - gvt->fence.vgpu_allocated_fence_num; - - for (i = 0; i < gvt->num_types; i++) { - low_gm_min = low_gm_avail / gvt->types[i].low_gm_size; - high_gm_min = high_gm_avail / gvt->types[i].high_gm_size; - fence_min = fence_avail / gvt->types[i].fence; - gvt->types[i].avail_instance = min(min(low_gm_min, high_gm_min), - fence_min); - - gvt_dbg_core("update type[%d]: %s avail %u low %u high %u fence %u\n", - i, gvt->types[i].type.sysfs_name, - gvt->types[i].avail_instance, gvt->types[i].low_gm_size, - gvt->types[i].high_gm_size, gvt->types[i].fence); - } -} - /** * intel_gvt_active_vgpu - activate a virtual GPU * @vgpu: virtual GPU @@ -309,10 +278,6 @@ void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu) intel_vgpu_dmabuf_cleanup(vgpu); mutex_unlock(&vgpu->vgpu_lock); - mutex_lock(&gvt->lock); - intel_gvt_update_vgpu_types(gvt); - mutex_unlock(&gvt->lock); - vfree(vgpu); } @@ -499,11 +464,8 @@ struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt, mutex_lock(&gvt->lock); vgpu = __intel_gvt_create_vgpu(gvt, ¶m); - if (!IS_ERR(vgpu)) { - /* calculate left instance change for types */ - intel_gvt_update_vgpu_types(gvt); + if (!IS_ERR(vgpu)) intel_gvt_update_reg_whitelist(vgpu); - } mutex_unlock(&gvt->lock); return vgpu; diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 35389f4b67dc5..94cc62b808088 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -70,20 +70,12 @@ static int vfio_ccw_mdev_notifier(struct notifier_block *nb, return NOTIFY_DONE; } -static ssize_t available_instances_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, - char *buf) +static unsigned int vfio_ccw_get_available(struct mdev_type *mtype) { struct vfio_ccw_private *private = dev_get_drvdata(mtype->parent->dev); - return sprintf(buf, "%d\n", atomic_read(&private->avail)); + return atomic_read(&private->avail); } -static MDEV_TYPE_ATTR_RO(available_instances); - -static const struct attribute *mdev_types_attrs[] = { - &mdev_type_attr_available_instances.attr, - NULL, -}; static int vfio_ccw_mdev_probe(struct mdev_device *mdev) { @@ -628,7 +620,7 @@ struct mdev_driver vfio_ccw_mdev_driver = { }, .probe = vfio_ccw_mdev_probe, .remove = vfio_ccw_mdev_remove, - .types_attrs = mdev_types_attrs, + .get_available = vfio_ccw_get_available, }; int vfio_ccw_mdev_reg(struct subchannel *sch) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index d6b2e819a615e..5e6cc43413117 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -511,21 +511,11 @@ static void vfio_ap_mdev_remove(struct mdev_device *mdev) atomic_inc(&matrix_dev->available_instances); } -static ssize_t available_instances_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, - char *buf) +static unsigned int vfio_ap_mdev_get_available(struct mdev_type *mtype) { - return sprintf(buf, "%d\n", - atomic_read(&matrix_dev->available_instances)); + return atomic_read(&matrix_dev->available_instances); } -static MDEV_TYPE_ATTR_RO(available_instances); - -static const struct attribute *vfio_ap_mdev_type_attrs[] = { - &mdev_type_attr_available_instances.attr, - NULL, -}; - struct vfio_ap_queue_reserved { unsigned long *apid; unsigned long *apqi; @@ -1445,7 +1435,7 @@ static struct mdev_driver vfio_ap_matrix_driver = { }, .probe = vfio_ap_mdev_probe, .remove = vfio_ap_mdev_remove, - .types_attrs = vfio_ap_mdev_type_attrs, + .get_available = vfio_ap_mdev_get_available, }; int vfio_ap_mdev_register(void) diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index 8384e2992c706..6e500d7f15441 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -91,10 +91,21 @@ static ssize_t name_show(struct mdev_type *mtype, static MDEV_TYPE_ATTR_RO(name); +static ssize_t available_instances_show(struct mdev_type *mtype, + struct mdev_type_attribute *attr, + char *buf) +{ + struct mdev_driver *drv = mtype->parent->mdev_driver; + + return sysfs_emit(buf, "%u\n", drv->get_available(mtype)); +} +static MDEV_TYPE_ATTR_RO(available_instances); + static struct attribute *mdev_types_core_attrs[] = { &mdev_type_attr_create.attr, &mdev_type_attr_device_api.attr, &mdev_type_attr_name.attr, + &mdev_type_attr_available_instances.attr, NULL, }; diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 64ca2ba806ed3..1188a5172a289 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -72,6 +72,7 @@ struct mdev_type_attribute { * @device_api: String to return for the device_api sysfs * @probe: called when new device created * @remove: called when device removed + * @get_available: Return the max number of instances that can be created * @types_attrs: attributes to the type kobjects. * @driver: device driver structure **/ @@ -79,6 +80,7 @@ struct mdev_driver { const char *device_api; int (*probe)(struct mdev_device *dev); void (*remove)(struct mdev_device *dev); + unsigned int (*get_available)(struct mdev_type *mtype); const struct attribute * const *types_attrs; struct device_driver driver; }; diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index c8271168a96ad..e61be7f8a9863 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -1344,21 +1344,16 @@ static ssize_t description_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(description); -static ssize_t available_instances_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, - char *buf) +static unsigned int mbochs_get_available(struct mdev_type *mtype) { struct mbochs_type *type = container_of(mtype, struct mbochs_type, type); - int count = atomic_read(&mbochs_avail_mbytes) / type->mbytes; - return sprintf(buf, "%d\n", count); + return atomic_read(&mbochs_avail_mbytes) / type->mbytes; } -static MDEV_TYPE_ATTR_RO(available_instances); static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_description.attr, - &mdev_type_attr_available_instances.attr, NULL, }; @@ -1380,6 +1375,7 @@ static struct mdev_driver mbochs_driver = { }, .probe = mbochs_probe, .remove = mbochs_remove, + .get_available = mbochs_get_available, .types_attrs = mdev_types_attrs, }; diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index 1b2117772192f..f1fddcdfedf6d 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -660,17 +660,13 @@ static ssize_t description_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(description); -static ssize_t available_instances_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, - char *buf) +static unsigned int mdpy_get_available(struct mdev_type *mtype) { - return sprintf(buf, "%d\n", max_devices - mdpy_count); + return max_devices - mdpy_count; } -static MDEV_TYPE_ATTR_RO(available_instances); static const struct attribute *mdev_types_attrs[] = { &mdev_type_attr_description.attr, - &mdev_type_attr_available_instances.attr, NULL, }; @@ -691,6 +687,7 @@ static struct mdev_driver mdpy_driver = { }, .probe = mdpy_probe, .remove = mdpy_remove, + .get_available = mdpy_get_available, .types_attrs = mdev_types_attrs, }; diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index b95a4491265c5..f6e8ec8240066 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -1247,23 +1247,13 @@ static const struct attribute_group *mdev_dev_groups[] = { NULL, }; -static ssize_t available_instances_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, - char *buf) +static unsigned int mtty_get_available(struct mdev_type *mtype) { struct mtty_type *type = container_of(mtype, struct mtty_type, type); - return sprintf(buf, "%d\n", atomic_read(&mdev_avail_ports) / - type->nr_ports); + return atomic_read(&mdev_avail_ports) / type->nr_ports; } -static MDEV_TYPE_ATTR_RO(available_instances); - -static const struct attribute *mdev_types_attrs[] = { - &mdev_type_attr_available_instances.attr, - NULL, -}; - static const struct vfio_device_ops mtty_dev_ops = { .name = "vfio-mtty", .read = mtty_read, @@ -1281,7 +1271,7 @@ static struct mdev_driver mtty_driver = { }, .probe = mtty_probe, .remove = mtty_remove, - .types_attrs = mdev_types_attrs, + .get_available = mtty_get_available, }; static void mtty_device_release(struct device *dev) From patchwork Tue Jun 14 04:54:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880427 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 963A5C43334 for ; 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Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0yZy-0072kk-La; Tue, 14 Jun 2022 04:55:03 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org Subject: [PATCH 12/13] vfio/mdev: consolidate all the description sysfs into the core code Date: Tue, 14 Jun 2022 06:54:27 +0200 Message-Id: <20220614045428.278494-13-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Every driver just emits a string, simply add a method to the mdev_driver to return it and provide a standard sysfs show function. Remove the now unused types_attrs field in struct mdev_driver and the support code for it. Signed-off-by: Christoph Hellwig Reviewed-by: Kirti Wankhede Reviewed-by: Jason Gunthorpe --- .../driver-api/vfio-mediated-device.rst | 4 +- drivers/gpu/drm/i915/gvt/kvmgt.c | 18 +++------ drivers/vfio/mdev/mdev_driver.c | 2 +- drivers/vfio/mdev/mdev_sysfs.c | 40 +++++++++++++++---- include/linux/mdev.h | 19 +-------- samples/vfio-mdev/mbochs.c | 11 +---- samples/vfio-mdev/mdpy.c | 11 +---- 7 files changed, 46 insertions(+), 59 deletions(-) diff --git a/Documentation/driver-api/vfio-mediated-device.rst b/Documentation/driver-api/vfio-mediated-device.rst index 96b789f569c5a..7b00214167cab 100644 --- a/Documentation/driver-api/vfio-mediated-device.rst +++ b/Documentation/driver-api/vfio-mediated-device.rst @@ -106,7 +106,7 @@ structure to represent a mediated device's driver:: int (*probe) (struct mdev_device *dev); void (*remove) (struct mdev_device *dev); unsigned int (*get_available)(struct mdev_type *mtype); - const struct attribute * const *types_attrs; + ssize_t (*show_description)(struct mdev_type *mtype, char *buf); struct device_driver driver; }; @@ -224,7 +224,7 @@ Directories and files under the sysfs for Each Physical Device * description - This attribute should show brief features/description of the type. This is + This attribute can show brief features/description of the type. This is an optional attribute. Directories and Files Under the sysfs for Each mdev Device diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 0e14bf94534c4..91c58924e6b23 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -113,8 +113,7 @@ static void kvmgt_page_track_flush_slot(struct kvm *kvm, struct kvm_memory_slot *slot, struct kvm_page_track_notifier_node *node); -static ssize_t description_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) +static ssize_t intel_vgpu_show_description(struct mdev_type *mtype, char *buf) { struct intel_vgpu_type *type = container_of(mtype, struct intel_vgpu_type, type); @@ -128,13 +127,6 @@ static ssize_t description_show(struct mdev_type *mtype, type->weight); } -static MDEV_TYPE_ATTR_RO(description); - -static const struct attribute *gvt_type_attrs[] = { - &mdev_type_attr_description.attr, - NULL, -}; - static void gvt_unpin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn, unsigned long size) { @@ -1586,10 +1578,10 @@ static struct mdev_driver intel_vgpu_mdev_driver = { .owner = THIS_MODULE, .dev_groups = intel_vgpu_groups, }, - .probe = intel_vgpu_probe, - .remove = intel_vgpu_remove, - .get_available = intel_vgpu_get_available, - .types_attrs = gvt_type_attrs, + .probe = intel_vgpu_probe, + .remove = intel_vgpu_remove, + .get_available = intel_vgpu_get_available, + .show_description = intel_vgpu_show_description, }; int intel_gvt_page_track_add(struct intel_vgpu *info, u64 gfn) diff --git a/drivers/vfio/mdev/mdev_driver.c b/drivers/vfio/mdev/mdev_driver.c index 60e8b9f6474e8..7825d83a55f8c 100644 --- a/drivers/vfio/mdev/mdev_driver.c +++ b/drivers/vfio/mdev/mdev_driver.c @@ -55,7 +55,7 @@ struct bus_type mdev_bus_type = { **/ int mdev_register_driver(struct mdev_driver *drv) { - if (!drv->types_attrs || !drv->device_api) + if (!drv->device_api) return -EINVAL; /* initialize common driver fields */ diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index 6e500d7f15441..03d3732723571 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -14,7 +14,19 @@ #include "mdev_private.h" -/* Static functions */ +struct mdev_type_attribute { + struct attribute attr; + ssize_t (*show)(struct mdev_type *mtype, + struct mdev_type_attribute *attr, char *buf); + ssize_t (*store)(struct mdev_type *mtype, + struct mdev_type_attribute *attr, const char *buf, + size_t count); +}; + +#define MDEV_TYPE_ATTR_RO(_name) \ + struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RO(_name) +#define MDEV_TYPE_ATTR_WO(_name) \ + struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_WO(_name) static ssize_t mdev_type_attr_show(struct kobject *kobj, struct attribute *__attr, char *buf) @@ -101,16 +113,35 @@ static ssize_t available_instances_show(struct mdev_type *mtype, } static MDEV_TYPE_ATTR_RO(available_instances); +static ssize_t description_show(struct mdev_type *mtype, + struct mdev_type_attribute *attr, + char *buf) +{ + return mtype->parent->mdev_driver->show_description(mtype, buf); +} +static MDEV_TYPE_ATTR_RO(description); + static struct attribute *mdev_types_core_attrs[] = { &mdev_type_attr_create.attr, &mdev_type_attr_device_api.attr, &mdev_type_attr_name.attr, &mdev_type_attr_available_instances.attr, + &mdev_type_attr_description.attr, NULL, }; +static umode_t mdev_types_core_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + if (attr == &mdev_type_attr_description.attr && + !to_mdev_type(kobj)->parent->mdev_driver->show_description) + return 0; + return attr->mode; +} + static struct attribute_group mdev_type_core_group = { .attrs = mdev_types_core_attrs, + .is_visible = mdev_types_core_is_visible, }; static const struct attribute_group *mdev_type_groups[] = { @@ -150,13 +181,8 @@ int mdev_type_add(struct mdev_parent *parent, struct mdev_type *type) goto attr_devices_failed; } - ret = sysfs_create_files(&type->kobj, parent->mdev_driver->types_attrs); - if (ret) - goto attrs_failed; return 0; -attrs_failed: - kobject_put(type->devices_kobj); attr_devices_failed: kobject_del(&type->kobj); kobject_put(&type->kobj); @@ -165,8 +191,6 @@ int mdev_type_add(struct mdev_parent *parent, struct mdev_type *type) void mdev_type_remove(struct mdev_type *type) { - sysfs_remove_files(&type->kobj, type->parent->mdev_driver->types_attrs); - kobject_put(type->devices_kobj); kobject_del(&type->kobj); kobject_put(&type->kobj); diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 1188a5172a289..2ed91b20aaae8 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -52,28 +52,13 @@ static inline struct mdev_device *to_mdev_device(struct device *dev) return container_of(dev, struct mdev_device, dev); } -/* interface for exporting mdev supported type attributes */ -struct mdev_type_attribute { - struct attribute attr; - ssize_t (*show)(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf); - ssize_t (*store)(struct mdev_type *mtype, - struct mdev_type_attribute *attr, const char *buf, - size_t count); -}; - -#define MDEV_TYPE_ATTR_RO(_name) \ - struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_RO(_name) -#define MDEV_TYPE_ATTR_WO(_name) \ - struct mdev_type_attribute mdev_type_attr_##_name = __ATTR_WO(_name) - /** * struct mdev_driver - Mediated device driver * @device_api: String to return for the device_api sysfs * @probe: called when new device created * @remove: called when device removed * @get_available: Return the max number of instances that can be created - * @types_attrs: attributes to the type kobjects. + * @show_description: Print a description of the mtype * @driver: device driver structure **/ struct mdev_driver { @@ -81,7 +66,7 @@ struct mdev_driver { int (*probe)(struct mdev_device *dev); void (*remove)(struct mdev_device *dev); unsigned int (*get_available)(struct mdev_type *mtype); - const struct attribute * const *types_attrs; + ssize_t (*show_description)(struct mdev_type *mtype, char *buf); struct device_driver driver; }; diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index e61be7f8a9863..0f9b9cf46f05b 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -1333,8 +1333,7 @@ static const struct attribute_group *mdev_dev_groups[] = { NULL, }; -static ssize_t description_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) +static ssize_t mbochs_show_description(struct mdev_type *mtype, char *buf) { struct mbochs_type *type = container_of(mtype, struct mbochs_type, type); @@ -1342,7 +1341,6 @@ static ssize_t description_show(struct mdev_type *mtype, return sprintf(buf, "virtual display, %d MB video memory\n", type ? type->mbytes : 0); } -static MDEV_TYPE_ATTR_RO(description); static unsigned int mbochs_get_available(struct mdev_type *mtype) { @@ -1352,11 +1350,6 @@ static unsigned int mbochs_get_available(struct mdev_type *mtype) return atomic_read(&mbochs_avail_mbytes) / type->mbytes; } -static const struct attribute *mdev_types_attrs[] = { - &mdev_type_attr_description.attr, - NULL, -}; - static const struct vfio_device_ops mbochs_dev_ops = { .close_device = mbochs_close_device, .read = mbochs_read, @@ -1376,7 +1369,7 @@ static struct mdev_driver mbochs_driver = { .probe = mbochs_probe, .remove = mbochs_remove, .get_available = mbochs_get_available, - .types_attrs = mdev_types_attrs, + .show_description = mbochs_show_description, }; static const struct file_operations vd_fops = { diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index f1fddcdfedf6d..c015ebd60d530 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -650,26 +650,19 @@ static const struct attribute_group *mdev_dev_groups[] = { NULL, }; -static ssize_t description_show(struct mdev_type *mtype, - struct mdev_type_attribute *attr, char *buf) +static ssize_t mdpy_show_description(struct mdev_type *mtype, char *buf) { struct mdpy_type *type = container_of(mtype, struct mdpy_type, type); return sprintf(buf, "virtual display, %dx%d framebuffer\n", type->width, type->height); } -static MDEV_TYPE_ATTR_RO(description); static unsigned int mdpy_get_available(struct mdev_type *mtype) { return max_devices - mdpy_count; } -static const struct attribute *mdev_types_attrs[] = { - &mdev_type_attr_description.attr, - NULL, -}; - static const struct vfio_device_ops mdpy_dev_ops = { .read = mdpy_read, .write = mdpy_write, @@ -688,7 +681,7 @@ static struct mdev_driver mdpy_driver = { .probe = mdpy_probe, .remove = mdpy_remove, .get_available = mdpy_get_available, - .types_attrs = mdev_types_attrs, + .show_description = mdpy_show_description, }; static const struct file_operations vd_fops = { From patchwork Tue Jun 14 04:54:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12880428 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51205C43334 for ; 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Received: from [2001:4bb8:180:36f6:1fed:6d48:cf16:d13c] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0ya1-0072ln-FP; Tue, 14 Jun 2022 04:55:06 +0000 From: Christoph Hellwig To: Kirti Wankhede , Tony Krowiak , Halil Pasic , Jason Herne , Eric Farman , Matthew Rosato , Zhenyu Wang , Zhi Wang , Alex Williamson Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org, Jason Gunthorpe Subject: [PATCH 13/13] vfio/mdev: add mdev available instance checking to the core Date: Tue, 14 Jun 2022 06:54:28 +0200 Message-Id: <20220614045428.278494-14-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220614045428.278494-1-hch@lst.de> References: <20220614045428.278494-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Jason Gunthorpe Many of the mdev drivers use a simple counter for keeping track of the available instances. Move this code to the core code and store the counter in the mdev_type. Implement it using correct locking, fixing mdpy. Drivers provide a the value in the mdev_driver at registration time and the core code provides a standard sysfs attribute to return the available_instances. Signed-off-by: Jason Gunthorpe [count instances per-parent instead of per-type] Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian --- drivers/s390/cio/vfio_ccw_drv.c | 1 - drivers/s390/cio/vfio_ccw_ops.c | 14 +------------- drivers/s390/cio/vfio_ccw_private.h | 2 -- drivers/s390/crypto/vfio_ap_ops.c | 21 +++------------------ drivers/s390/crypto/vfio_ap_private.h | 2 -- drivers/vfio/mdev/mdev_core.c | 10 ++++++++++ include/linux/mdev.h | 3 +++ samples/vfio-mdev/mdpy.c | 23 ++++------------------- 8 files changed, 21 insertions(+), 55 deletions(-) diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c index 750d0315f1f5b..449c76b29a3b5 100644 --- a/drivers/s390/cio/vfio_ccw_drv.c +++ b/drivers/s390/cio/vfio_ccw_drv.c @@ -149,7 +149,6 @@ static struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch) INIT_LIST_HEAD(&private->crw); INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo); INIT_WORK(&private->crw_work, vfio_ccw_crw_todo); - atomic_set(&private->avail, 1); private->cp.guest_cp = kcalloc(CCWCHAIN_LEN_MAX, sizeof(struct ccw1), GFP_KERNEL); diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 94cc62b808088..b89ac599a9087 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -70,13 +70,6 @@ static int vfio_ccw_mdev_notifier(struct notifier_block *nb, return NOTIFY_DONE; } -static unsigned int vfio_ccw_get_available(struct mdev_type *mtype) -{ - struct vfio_ccw_private *private = dev_get_drvdata(mtype->parent->dev); - - return atomic_read(&private->avail); -} - static int vfio_ccw_mdev_probe(struct mdev_device *mdev) { struct vfio_ccw_private *private = dev_get_drvdata(mdev->dev.parent); @@ -85,9 +78,6 @@ static int vfio_ccw_mdev_probe(struct mdev_device *mdev) if (private->state == VFIO_CCW_STATE_NOT_OPER) return -ENODEV; - if (atomic_dec_if_positive(&private->avail) < 0) - return -EPERM; - memset(&private->vdev, 0, sizeof(private->vdev)); vfio_init_group_dev(&private->vdev, &mdev->dev, &vfio_ccw_dev_ops); @@ -108,7 +98,6 @@ static int vfio_ccw_mdev_probe(struct mdev_device *mdev) err_atomic: vfio_uninit_group_dev(&private->vdev); - atomic_inc(&private->avail); private->mdev = NULL; private->state = VFIO_CCW_STATE_IDLE; return ret; @@ -135,7 +124,6 @@ static void vfio_ccw_mdev_remove(struct mdev_device *mdev) vfio_uninit_group_dev(&private->vdev); cp_free(&private->cp); private->mdev = NULL; - atomic_inc(&private->avail); } static int vfio_ccw_mdev_open_device(struct vfio_device *vdev) @@ -613,6 +601,7 @@ static const struct vfio_device_ops vfio_ccw_dev_ops = { struct mdev_driver vfio_ccw_mdev_driver = { .device_api = VFIO_DEVICE_API_CCW_STRING, + .max_instances = 1, .driver = { .name = "vfio_ccw_mdev", .owner = THIS_MODULE, @@ -620,7 +609,6 @@ struct mdev_driver vfio_ccw_mdev_driver = { }, .probe = vfio_ccw_mdev_probe, .remove = vfio_ccw_mdev_remove, - .get_available = vfio_ccw_get_available, }; int vfio_ccw_mdev_reg(struct subchannel *sch) diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h index 7272eb7886124..d64d12e789048 100644 --- a/drivers/s390/cio/vfio_ccw_private.h +++ b/drivers/s390/cio/vfio_ccw_private.h @@ -72,7 +72,6 @@ struct vfio_ccw_crw { * @sch: pointer to the subchannel * @state: internal state of the device * @completion: synchronization helper of the I/O completion - * @avail: available for creating a mediated device * @mdev: pointer to the mediated device * @nb: notifier for vfio events * @io_region: MMIO region to input/output I/O arguments/results @@ -96,7 +95,6 @@ struct vfio_ccw_private { struct subchannel *sch; int state; struct completion *completion; - atomic_t avail; struct mdev_device *mdev; struct notifier_block nb; struct ccw_io_region *io_region; diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 5e6cc43413117..3d1108f1b7556 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -461,14 +461,9 @@ static int vfio_ap_mdev_probe(struct mdev_device *mdev) struct ap_matrix_mdev *matrix_mdev; int ret; - if ((atomic_dec_if_positive(&matrix_dev->available_instances) < 0)) - return -EPERM; - matrix_mdev = kzalloc(sizeof(*matrix_mdev), GFP_KERNEL); - if (!matrix_mdev) { - ret = -ENOMEM; - goto err_dec_available; - } + if (!matrix_mdev) + return -ENOMEM; vfio_init_group_dev(&matrix_mdev->vdev, &mdev->dev, &vfio_ap_matrix_dev_ops); @@ -491,8 +486,6 @@ static int vfio_ap_mdev_probe(struct mdev_device *mdev) mutex_unlock(&matrix_dev->lock); vfio_uninit_group_dev(&matrix_mdev->vdev); kfree(matrix_mdev); -err_dec_available: - atomic_inc(&matrix_dev->available_instances); return ret; } @@ -508,12 +501,6 @@ static void vfio_ap_mdev_remove(struct mdev_device *mdev) mutex_unlock(&matrix_dev->lock); vfio_uninit_group_dev(&matrix_mdev->vdev); kfree(matrix_mdev); - atomic_inc(&matrix_dev->available_instances); -} - -static unsigned int vfio_ap_mdev_get_available(struct mdev_type *mtype) -{ - return atomic_read(&matrix_dev->available_instances); } struct vfio_ap_queue_reserved { @@ -1427,6 +1414,7 @@ static const struct vfio_device_ops vfio_ap_matrix_dev_ops = { static struct mdev_driver vfio_ap_matrix_driver = { .device_api = VFIO_DEVICE_API_AP_STRING, + .max_instances = MAX_ZDEV_ENTRIES_EXT, .driver = { .name = "vfio_ap_mdev", .owner = THIS_MODULE, @@ -1435,15 +1423,12 @@ static struct mdev_driver vfio_ap_matrix_driver = { }, .probe = vfio_ap_mdev_probe, .remove = vfio_ap_mdev_remove, - .get_available = vfio_ap_mdev_get_available, }; int vfio_ap_mdev_register(void) { int ret; - atomic_set(&matrix_dev->available_instances, MAX_ZDEV_ENTRIES_EXT); - ret = mdev_register_driver(&vfio_ap_matrix_driver); if (ret) return ret; diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index 5dc5050d03791..b808b343b771f 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -28,7 +28,6 @@ * struct ap_matrix_dev - Contains the data for the matrix device. * * @device: generic device structure associated with the AP matrix device - * @available_instances: number of mediated matrix devices that can be created * @info: the struct containing the output from the PQAP(QCI) instruction * @mdev_list: the list of mediated matrix devices created * @lock: mutex for locking the AP matrix device. This lock will be @@ -40,7 +39,6 @@ */ struct ap_matrix_dev { struct device device; - atomic_t available_instances; struct ap_config_info info; struct list_head mdev_list; struct mutex lock; diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index 20513b7f6b5eb..3a4d4fc9b4222 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -66,6 +66,7 @@ int mdev_register_parent(struct mdev_parent *parent, struct device *dev, init_rwsem(&parent->unreg_sem); parent->dev = dev; parent->mdev_driver = mdev_driver; + parent->available_instances = mdev_driver->max_instances; if (!mdev_bus_compat_class) { mdev_bus_compat_class = class_compat_register("mdev_bus"); @@ -135,6 +136,7 @@ static void mdev_device_release(struct device *dev) mutex_lock(&mdev_list_lock); list_del(&mdev->next); + mdev->type->parent->available_instances++; mutex_unlock(&mdev_list_lock); dev_dbg(&mdev->dev, "MDEV: destroying\n"); @@ -158,6 +160,14 @@ int mdev_device_create(struct mdev_type *type, const guid_t *uuid) } } + if (!drv->get_available) { + if (!parent->available_instances) { + mutex_unlock(&mdev_list_lock); + return -EUSERS; + } + parent->available_instances--; + } + mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); if (!mdev) { mutex_unlock(&mdev_list_lock); diff --git a/include/linux/mdev.h b/include/linux/mdev.h index 2ed91b20aaae8..7945a66477820 100644 --- a/include/linux/mdev.h +++ b/include/linux/mdev.h @@ -45,6 +45,7 @@ struct mdev_parent { struct rw_semaphore unreg_sem; struct mdev_type **types; unsigned int nr_types; + unsigned int available_instances; }; static inline struct mdev_device *to_mdev_device(struct device *dev) @@ -55,6 +56,7 @@ static inline struct mdev_device *to_mdev_device(struct device *dev) /** * struct mdev_driver - Mediated device driver * @device_api: String to return for the device_api sysfs + * @max_instances: Maximum number of instances supported (optional) * @probe: called when new device created * @remove: called when device removed * @get_available: Return the max number of instances that can be created @@ -63,6 +65,7 @@ static inline struct mdev_device *to_mdev_device(struct device *dev) **/ struct mdev_driver { const char *device_api; + unsigned int max_instances; int (*probe)(struct mdev_device *dev); void (*remove)(struct mdev_device *dev); unsigned int (*get_available)(struct mdev_type *mtype); diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c index c015ebd60d530..39b6c285b075c 100644 --- a/samples/vfio-mdev/mdpy.c +++ b/samples/vfio-mdev/mdpy.c @@ -42,11 +42,6 @@ MODULE_LICENSE("GPL v2"); -static int max_devices = 4; -module_param_named(count, max_devices, int, 0444); -MODULE_PARM_DESC(count, "number of " MDPY_NAME " devices"); - - #define MDPY_TYPE_1 "vga" #define MDPY_TYPE_2 "xga" #define MDPY_TYPE_3 "hd" @@ -93,7 +88,6 @@ static struct class *mdpy_class; static struct cdev mdpy_cdev; static struct device mdpy_dev; static struct mdev_parent mdpy_parent; -static u32 mdpy_count; static const struct vfio_device_ops mdpy_dev_ops; /* State of each mdev device */ @@ -234,9 +228,6 @@ static int mdpy_probe(struct mdev_device *mdev) u32 fbsize; int ret; - if (mdpy_count >= max_devices) - return -ENOMEM; - mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL); if (mdev_state == NULL) return -ENOMEM; @@ -265,8 +256,6 @@ static int mdpy_probe(struct mdev_device *mdev) mdpy_create_config_space(mdev_state); mdpy_reset(mdev_state); - mdpy_count++; - ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev); if (ret) goto err_mem; @@ -293,8 +282,6 @@ static void mdpy_remove(struct mdev_device *mdev) kfree(mdev_state->vconfig); vfio_uninit_group_dev(&mdev_state->vdev); kfree(mdev_state); - - mdpy_count--; } static ssize_t mdpy_read(struct vfio_device *vdev, char __user *buf, @@ -658,11 +645,6 @@ static ssize_t mdpy_show_description(struct mdev_type *mtype, char *buf) type->width, type->height); } -static unsigned int mdpy_get_available(struct mdev_type *mtype) -{ - return max_devices - mdpy_count; -} - static const struct vfio_device_ops mdpy_dev_ops = { .read = mdpy_read, .write = mdpy_write, @@ -672,6 +654,7 @@ static const struct vfio_device_ops mdpy_dev_ops = { static struct mdev_driver mdpy_driver = { .device_api = VFIO_DEVICE_API_PCI_STRING, + .max_instances = 4, .driver = { .name = "mdpy", .owner = THIS_MODULE, @@ -680,7 +663,6 @@ static struct mdev_driver mdpy_driver = { }, .probe = mdpy_probe, .remove = mdpy_remove, - .get_available = mdpy_get_available, .show_description = mdpy_show_description, }; @@ -757,5 +739,8 @@ static void __exit mdpy_dev_exit(void) mdpy_class = NULL; } +module_param_named(count, mdpy_driver.max_instances, int, 0444); +MODULE_PARM_DESC(count, "number of " MDPY_NAME " devices"); + module_init(mdpy_dev_init) module_exit(mdpy_dev_exit)