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(unknown []) by gzga-smtp-mtada-g0-1 (Coremail) with SMTP id _____wD3z+aU7T9oYMSDGA--.17172S2; Wed, 04 Jun 2025 14:54:13 +0800 (CST) From: Zongmin Zhou To: gregkh@linuxfoundation.org, shuah@kernel.org Cc: valentina.manea.m@gmail.com, i@zenithal.me, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, zhouzongmin@kylinos.cn Subject: [PATCH v2] usbip: convert to use faux_device Date: Wed, 4 Jun 2025 14:54:10 +0800 Message-Id: <20250604065410.76069-1-min_halo@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <2a327b520760271471717fff9b222cdc34967489.1746662386.git.zhouzongmin@kylinos.cn> References: <2a327b520760271471717fff9b222cdc34967489.1746662386.git.zhouzongmin@kylinos.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wD3z+aU7T9oYMSDGA--.17172S2 X-Coremail-Antispam: 1Uf129KBjvAXoW3tFWxtF17ur15Ar43KF1fXrb_yoW8Wr4xto Z3JFyfXr1rGr1xu3y8Jan7tFsxZa1Duws5KrZYyF4DCFZ3Zw1Ygry7GF1Yg3W5ur13KF1D tw1ft3s5XF1xJrZ7n29KB7ZKAUJUUUU8529EdanIXcx71UUUUU7v73VFW2AGmfu7bjvjm3 AaLaJ3UbIYCTnIWIevJa73UjIFyTuYvjxUc9a9UUUUU X-CM-SenderInfo: pplqsxxdorqiywtou0bp/1tbiUB5iq2g-6h9zNgAAsg Content-Type: text/plain; charset="utf-8" From: Zongmin Zhou The vhci driver does not need to create a platform device, it only did so because it was simple to do that in order to get a place in sysfs to hang some device-specific attributes. Now the faux device interface is more appropriate,change it over to use the faux bus instead. Signed-off-by: Zongmin Zhou Acked-by: Shuah Khan --- Changes in v2: - don't change faux create api,just call probe on vhci_hcd_init. drivers/usb/usbip/vhci.h | 4 +- drivers/usb/usbip/vhci_hcd.c | 86 +++++++++++----------------- drivers/usb/usbip/vhci_sysfs.c | 68 +++++++++++----------- tools/usb/usbip/libsrc/vhci_driver.h | 2 +- 4 files changed, 72 insertions(+), 88 deletions(-) diff --git a/drivers/usb/usbip/vhci.h b/drivers/usb/usbip/vhci.h index 5659dce1526e..a73070a3f450 100644 --- a/drivers/usb/usbip/vhci.h +++ b/drivers/usb/usbip/vhci.h @@ -93,7 +93,7 @@ enum hub_speed { struct vhci { spinlock_t lock; =20 - struct platform_device *pdev; + struct faux_device *fdev; =20 struct vhci_hcd *vhci_hcd_hs; struct vhci_hcd *vhci_hcd_ss; @@ -141,7 +141,7 @@ static inline __u32 port_to_rhport(__u32 port) return port % VHCI_HC_PORTS; } =20 -static inline int port_to_pdev_nr(__u32 port) +static inline int port_to_fdev_nr(__u32 port) { return port / VHCI_PORTS; } diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index e70fba9f55d6..4e6d7d23e915 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -9,7 +9,7 @@ #include #include #include -#include +#include #include #include =20 @@ -1143,7 +1143,7 @@ static int hcd_name_to_id(const char *name) =20 static int vhci_setup(struct usb_hcd *hcd) { - struct vhci *vhci =3D *((void **)dev_get_platdata(hcd->self.controller)); + struct vhci *vhci =3D dev_get_platdata(hcd->self.controller); =20 if (usb_hcd_is_primary_hcd(hcd)) { vhci->vhci_hcd_hs =3D hcd_to_vhci_hcd(hcd); @@ -1257,7 +1257,7 @@ static int vhci_get_frame_number(struct usb_hcd *hcd) /* FIXME: suspend/resume */ static int vhci_bus_suspend(struct usb_hcd *hcd) { - struct vhci *vhci =3D *((void **)dev_get_platdata(hcd->self.controller)); + struct vhci *vhci =3D dev_get_platdata(hcd->self.controller); unsigned long flags; =20 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); @@ -1271,7 +1271,7 @@ static int vhci_bus_suspend(struct usb_hcd *hcd) =20 static int vhci_bus_resume(struct usb_hcd *hcd) { - struct vhci *vhci =3D *((void **)dev_get_platdata(hcd->self.controller)); + struct vhci *vhci =3D dev_get_platdata(hcd->self.controller); int rc =3D 0; unsigned long flags; =20 @@ -1336,20 +1336,19 @@ static const struct hc_driver vhci_hc_driver =3D { .free_streams =3D vhci_free_streams, }; =20 -static int vhci_hcd_probe(struct platform_device *pdev) +static int vhci_hcd_probe(struct faux_device *fdev) { - struct vhci *vhci =3D *((void **)dev_get_platdata(&pdev->dev)= ); + struct vhci *vhci =3D dev_get_platdata(&fdev->dev); struct usb_hcd *hcd_hs; struct usb_hcd *hcd_ss; int ret; =20 - usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id); =20 /* * Allocate and initialize hcd. * Our private data is also allocated automatically. */ - hcd_hs =3D usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->de= v)); + hcd_hs =3D usb_create_hcd(&vhci_hc_driver, &fdev->dev, dev_name(&fdev->de= v)); if (!hcd_hs) { pr_err("create primary hcd failed\n"); return -ENOMEM; @@ -1366,8 +1365,8 @@ static int vhci_hcd_probe(struct platform_device *pde= v) goto put_usb2_hcd; } =20 - hcd_ss =3D usb_create_shared_hcd(&vhci_hc_driver, &pdev->dev, - dev_name(&pdev->dev), hcd_hs); + hcd_ss =3D usb_create_shared_hcd(&vhci_hc_driver, &fdev->dev, + dev_name(&fdev->dev), hcd_hs); if (!hcd_ss) { ret =3D -ENOMEM; pr_err("create shared hcd failed\n"); @@ -1394,9 +1393,9 @@ static int vhci_hcd_probe(struct platform_device *pde= v) return ret; } =20 -static void vhci_hcd_remove(struct platform_device *pdev) +static void vhci_hcd_remove(struct faux_device *fdev) { - struct vhci *vhci =3D *((void **)dev_get_platdata(&pdev->dev)); + struct vhci *vhci =3D dev_get_platdata(&fdev->dev); =20 /* * Disconnects the root hub, @@ -1416,7 +1415,7 @@ static void vhci_hcd_remove(struct platform_device *p= dev) #ifdef CONFIG_PM =20 /* what should happen for USB/IP under suspend/resume? */ -static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t sta= te) +static int vhci_hcd_suspend(struct faux_device *fdev, pm_message_t state) { struct usb_hcd *hcd; struct vhci *vhci; @@ -1425,13 +1424,13 @@ static int vhci_hcd_suspend(struct platform_device = *pdev, pm_message_t state) int ret =3D 0; unsigned long flags; =20 - dev_dbg(&pdev->dev, "%s\n", __func__); + dev_dbg(&fdev->dev, "%s\n", __func__); =20 - hcd =3D platform_get_drvdata(pdev); + hcd =3D faux_device_get_drvdata(fdev); if (!hcd) return 0; =20 - vhci =3D *((void **)dev_get_platdata(hcd->self.controller)); + vhci =3D dev_get_platdata(hcd->self.controller); =20 spin_lock_irqsave(&vhci->lock, flags); =20 @@ -1448,25 +1447,25 @@ static int vhci_hcd_suspend(struct platform_device = *pdev, pm_message_t state) spin_unlock_irqrestore(&vhci->lock, flags); =20 if (connected > 0) { - dev_info(&pdev->dev, + dev_info(&fdev->dev, "We have %d active connection%s. Do not suspend.\n", connected, str_plural(connected)); ret =3D -EBUSY; } else { - dev_info(&pdev->dev, "suspend vhci_hcd"); + dev_info(&fdev->dev, "suspend vhci_hcd"); clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); } =20 return ret; } =20 -static int vhci_hcd_resume(struct platform_device *pdev) +static int vhci_hcd_resume(struct faux_device *fdev) { struct usb_hcd *hcd; =20 - dev_dbg(&pdev->dev, "%s\n", __func__); + dev_dbg(&fdev->dev, "%s\n", __func__); =20 - hcd =3D platform_get_drvdata(pdev); + hcd =3D faux_device_get_drvdata(fdev); if (!hcd) return 0; set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); @@ -1482,25 +1481,18 @@ static int vhci_hcd_resume(struct platform_device *= pdev) =20 #endif =20 -static struct platform_driver vhci_driver =3D { - .probe =3D vhci_hcd_probe, +static struct faux_device_ops vhci_driver =3D { .remove =3D vhci_hcd_remove, - .suspend =3D vhci_hcd_suspend, - .resume =3D vhci_hcd_resume, - .driver =3D { - .name =3D driver_name, - }, }; =20 -static void del_platform_devices(void) +static void del_faux_devices(void) { int i; =20 for (i =3D 0; i < vhci_num_controllers; i++) { - platform_device_unregister(vhcis[i].pdev); - vhcis[i].pdev =3D NULL; + faux_device_destroy(vhcis[i].fdev); + vhcis[i].fdev =3D NULL; } - sysfs_remove_link(&platform_bus.kobj, driver_name); } =20 static int __init vhci_hcd_init(void) @@ -1517,41 +1509,33 @@ static int __init vhci_hcd_init(void) if (vhcis =3D=3D NULL) return -ENOMEM; =20 - ret =3D platform_driver_register(&vhci_driver); - if (ret) - goto err_driver_register; - for (i =3D 0; i < vhci_num_controllers; i++) { void *vhci =3D &vhcis[i]; - struct platform_device_info pdevinfo =3D { - .name =3D driver_name, - .id =3D i, - .data =3D &vhci, - .size_data =3D sizeof(void *), - }; - - vhcis[i].pdev =3D platform_device_register_full(&pdevinfo); - ret =3D PTR_ERR_OR_ZERO(vhcis[i].pdev); - if (ret < 0) { + char vhci_name[16]; + + snprintf(vhci_name, 16, "%s.%d", driver_name, i); + + vhcis[i].fdev =3D faux_device_create_with_groups(vhci_name, NULL, &vhci_= driver, NULL); + if (!vhcis[i].fdev) { while (i--) - platform_device_unregister(vhcis[i].pdev); + faux_device_destroy(vhcis[i].fdev); + ret =3D -ENODEV; goto err_add_hcd; } + vhcis[i].fdev->dev.platform_data =3D vhci; + vhci_hcd_probe(vhcis[i].fdev); } =20 return 0; =20 err_add_hcd: - platform_driver_unregister(&vhci_driver); -err_driver_register: kfree(vhcis); return ret; } =20 static void __exit vhci_hcd_exit(void) { - del_platform_devices(); - platform_driver_unregister(&vhci_driver); + del_faux_devices(); kfree(vhcis); } =20 diff --git a/drivers/usb/usbip/vhci_sysfs.c b/drivers/usb/usbip/vhci_sysfs.c index d5865460e82d..d1e6b239399f 100644 --- a/drivers/usb/usbip/vhci_sysfs.c +++ b/drivers/usb/usbip/vhci_sysfs.c @@ -7,7 +7,7 @@ #include #include #include -#include +#include #include =20 /* Hardening for Spectre-v1 */ @@ -28,7 +28,7 @@ * * Output includes socket fd instead of socket pointer address to avoid * leaking kernel memory address in: - * /sys/devices/platform/vhci_hcd.0/status and in debug output. + * /sys/devices/faux/vhci_hcd.0/status and in debug output. * The socket pointer address is not used at the moment and it was made * visible as a convenient way to find IP address from socket pointer * address by looking up /proc/net/{tcp,tcp6}. As this opens a security @@ -60,9 +60,9 @@ static void port_show_vhci(char **out, int hub, int port,= struct vhci_device *vd } =20 /* Sysfs entry to show port status */ -static ssize_t status_show_vhci(int pdev_nr, char *out) +static ssize_t status_show_vhci(int fdev_nr, char *out) { - struct platform_device *pdev =3D vhcis[pdev_nr].pdev; + struct faux_device *fdev =3D vhcis[fdev_nr].fdev; struct vhci *vhci; struct usb_hcd *hcd; struct vhci_hcd *vhci_hcd; @@ -70,12 +70,12 @@ static ssize_t status_show_vhci(int pdev_nr, char *out) int i; unsigned long flags; =20 - if (!pdev || !out) { + if (!fdev || !out) { usbip_dbg_vhci_sysfs("show status error\n"); return 0; } =20 - hcd =3D platform_get_drvdata(pdev); + hcd =3D faux_device_get_drvdata(fdev); vhci_hcd =3D hcd_to_vhci_hcd(hcd); vhci =3D vhci_hcd->vhci; =20 @@ -86,7 +86,7 @@ static ssize_t status_show_vhci(int pdev_nr, char *out) =20 spin_lock(&vdev->ud.lock); port_show_vhci(&out, HUB_SPEED_HIGH, - pdev_nr * VHCI_PORTS + i, vdev); + fdev_nr * VHCI_PORTS + i, vdev); spin_unlock(&vdev->ud.lock); } =20 @@ -95,7 +95,7 @@ static ssize_t status_show_vhci(int pdev_nr, char *out) =20 spin_lock(&vdev->ud.lock); port_show_vhci(&out, HUB_SPEED_SUPER, - pdev_nr * VHCI_PORTS + VHCI_HC_PORTS + i, vdev); + fdev_nr * VHCI_PORTS + VHCI_HC_PORTS + i, vdev); spin_unlock(&vdev->ud.lock); } =20 @@ -104,14 +104,14 @@ static ssize_t status_show_vhci(int pdev_nr, char *ou= t) return out - s; } =20 -static ssize_t status_show_not_ready(int pdev_nr, char *out) +static ssize_t status_show_not_ready(int fdev_nr, char *out) { char *s =3D out; int i =3D 0; =20 for (i =3D 0; i < VHCI_HC_PORTS; i++) { out +=3D sprintf(out, "hs %04u %03u ", - (pdev_nr * VHCI_PORTS) + i, + (fdev_nr * VHCI_PORTS) + i, VDEV_ST_NOTASSIGNED); out +=3D sprintf(out, "000 00000000 0000000000000000 0-0"); out +=3D sprintf(out, "\n"); @@ -119,7 +119,7 @@ static ssize_t status_show_not_ready(int pdev_nr, char = *out) =20 for (i =3D 0; i < VHCI_HC_PORTS; i++) { out +=3D sprintf(out, "ss %04u %03u ", - (pdev_nr * VHCI_PORTS) + VHCI_HC_PORTS + i, + (fdev_nr * VHCI_PORTS) + VHCI_HC_PORTS + i, VDEV_ST_NOTASSIGNED); out +=3D sprintf(out, "000 00000000 0000000000000000 0-0"); out +=3D sprintf(out, "\n"); @@ -148,16 +148,16 @@ static ssize_t status_show(struct device *dev, struct device_attribute *attr, char *out) { char *s =3D out; - int pdev_nr; + int fdev_nr; =20 out +=3D sprintf(out, "hub port sta spd dev sockfd local_busid\n"); =20 - pdev_nr =3D status_name_to_id(attr->attr.name); - if (pdev_nr < 0) - out +=3D status_show_not_ready(pdev_nr, out); + fdev_nr =3D status_name_to_id(attr->attr.name); + if (fdev_nr < 0) + out +=3D status_show_not_ready(fdev_nr, out); else - out +=3D status_show_vhci(pdev_nr, out); + out +=3D status_show_vhci(fdev_nr, out); =20 return out - s; } @@ -213,13 +213,13 @@ static int vhci_port_disconnect(struct vhci_hcd *vhci= _hcd, __u32 rhport) return 0; } =20 -static int valid_port(__u32 *pdev_nr, __u32 *rhport) +static int valid_port(__u32 *fdev_nr, __u32 *rhport) { - if (*pdev_nr >=3D vhci_num_controllers) { - pr_err("pdev %u\n", *pdev_nr); + if (*fdev_nr >=3D vhci_num_controllers) { + pr_err("fdev %u\n", *fdev_nr); return 0; } - *pdev_nr =3D array_index_nospec(*pdev_nr, vhci_num_controllers); + *fdev_nr =3D array_index_nospec(*fdev_nr, vhci_num_controllers); =20 if (*rhport >=3D VHCI_HC_PORTS) { pr_err("rhport %u\n", *rhport); @@ -233,7 +233,7 @@ static int valid_port(__u32 *pdev_nr, __u32 *rhport) static ssize_t detach_store(struct device *dev, struct device_attribute *a= ttr, const char *buf, size_t count) { - __u32 port =3D 0, pdev_nr =3D 0, rhport =3D 0; + __u32 port =3D 0, fdev_nr =3D 0, rhport =3D 0; struct usb_hcd *hcd; struct vhci_hcd *vhci_hcd; int ret; @@ -241,13 +241,13 @@ static ssize_t detach_store(struct device *dev, struc= t device_attribute *attr, if (kstrtoint(buf, 10, &port) < 0) return -EINVAL; =20 - pdev_nr =3D port_to_pdev_nr(port); + fdev_nr =3D port_to_fdev_nr(port); rhport =3D port_to_rhport(port); =20 - if (!valid_port(&pdev_nr, &rhport)) + if (!valid_port(&fdev_nr, &rhport)) return -EINVAL; =20 - hcd =3D platform_get_drvdata(vhcis[pdev_nr].pdev); + hcd =3D faux_device_get_drvdata(vhcis[fdev_nr].fdev); if (hcd =3D=3D NULL) { dev_err(dev, "port is not ready %u\n", port); return -EAGAIN; @@ -270,10 +270,10 @@ static ssize_t detach_store(struct device *dev, struc= t device_attribute *attr, } static DEVICE_ATTR_WO(detach); =20 -static int valid_args(__u32 *pdev_nr, __u32 *rhport, +static int valid_args(__u32 *fdev_nr, __u32 *rhport, enum usb_device_speed speed) { - if (!valid_port(pdev_nr, rhport)) { + if (!valid_port(fdev_nr, rhport)) { return 0; } =20 @@ -311,7 +311,7 @@ static ssize_t attach_store(struct device *dev, struct = device_attribute *attr, { struct socket *socket; int sockfd =3D 0; - __u32 port =3D 0, pdev_nr =3D 0, rhport =3D 0, devid =3D 0, speed =3D 0; + __u32 port =3D 0, fdev_nr =3D 0, rhport =3D 0, devid =3D 0, speed =3D 0; struct usb_hcd *hcd; struct vhci_hcd *vhci_hcd; struct vhci_device *vdev; @@ -329,19 +329,19 @@ static ssize_t attach_store(struct device *dev, struc= t device_attribute *attr, */ if (sscanf(buf, "%u %u %u %u", &port, &sockfd, &devid, &speed) !=3D 4) return -EINVAL; - pdev_nr =3D port_to_pdev_nr(port); + fdev_nr =3D port_to_fdev_nr(port); rhport =3D port_to_rhport(port); =20 - usbip_dbg_vhci_sysfs("port(%u) pdev(%d) rhport(%u)\n", - port, pdev_nr, rhport); + usbip_dbg_vhci_sysfs("port(%u) fdev(%d) rhport(%u)\n", + port, fdev_nr, rhport); usbip_dbg_vhci_sysfs("sockfd(%u) devid(%u) speed(%u)\n", sockfd, devid, speed); =20 /* check received parameters */ - if (!valid_args(&pdev_nr, &rhport, speed)) + if (!valid_args(&fdev_nr, &rhport, speed)) return -EINVAL; =20 - hcd =3D platform_get_drvdata(vhcis[pdev_nr].pdev); + hcd =3D faux_device_get_drvdata(vhcis[fdev_nr].fdev); if (hcd =3D=3D NULL) { dev_err(dev, "port %d is not ready\n", port); return -EAGAIN; @@ -413,8 +413,8 @@ static ssize_t attach_store(struct device *dev, struct = device_attribute *attr, goto unlock_mutex; } =20 - dev_info(dev, "pdev(%u) rhport(%u) sockfd(%d)\n", - pdev_nr, rhport, sockfd); + dev_info(dev, "fdev(%u) rhport(%u) sockfd(%d)\n", + fdev_nr, rhport, sockfd); dev_info(dev, "devid(%u) speed(%u) speed_str(%s)\n", devid, speed, usb_speed_string(speed)); =20 diff --git a/tools/usb/usbip/libsrc/vhci_driver.h b/tools/usb/usbip/libsrc/= vhci_driver.h index 6c9aca216705..20918e74de59 100644 --- a/tools/usb/usbip/libsrc/vhci_driver.h +++ b/tools/usb/usbip/libsrc/vhci_driver.h @@ -11,7 +11,7 @@ =20 #include "usbip_common.h" =20 -#define USBIP_VHCI_BUS_TYPE "platform" +#define USBIP_VHCI_BUS_TYPE "faux" #define USBIP_VHCI_DEVICE_NAME "vhci_hcd.0" =20 enum hub_speed { --=20 2.25.1