│ │ --- USB Gadget Support │ │
│ │ [ ] Debugging messages (DEVELOPMENT) │ │
│ │ [ ] Debugging information files (DEVELOPMENT) │ │
│ │ [ ] Debugging information files in debugfs (DEVELOPMENT) │ │
│ │ (2) Maximum VBUS Power usage (2-500 mA) │ │
│ │ (2) Number of storage pipeline buffers │ │
│ │ USB Peripheral Controller ---> │ │
│ │ <*> USB Gadget Drivers (Ethernet Gadget (with CDC Ethernet support)) ---> │ │
│ │ Ethernet Gadget (with CDC Ethernet support) │ │
│ │ 【*】 RNDIS support │ │
│ │ [ ] Ethernet Emulation Model (EEM) support │ │
│ │ │ │
│ │ RNDIS support这个选项一选上就报错，请问一下大佬知道是什么问题吗
In file included from drivers/usb/gadget/ether.c:106:0:
drivers/usb/gadget/f_rndis.c:70:41: error: expected ')' before 'uint'
module_param(rndis_dl_max_pkt_per_xfer, uint, S_IRUGO | S_IWUSR);
^~~~
drivers/usb/gadget/f_rndis.c:72:2: error: expected ')' before string constant
"Maximum packets per transfer for DL aggregation");
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/gadget/f_rndis.c:75:41: error: expected ')' before 'uint'
module_param(rndis_ul_max_pkt_per_xfer, uint, S_IRUGO | S_IWUSR);
^~~~
drivers/usb/gadget/f_rndis.c:77:8: error: expected ')' before string constant
"Maximum packets per transfer for UL aggregation");
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
scripts/Makefile.build:308: recipe for target 'drivers/usb/gadget/ether.o' failed
make[8]: *** [drivers/usb/gadget/ether.o] Error 1
scripts/Makefile.build:455: recipe for target 'drivers/usb/gadget' failed
make[7]: *** [drivers/usb/gadget] Error 2
scripts/Makefile.build:455: recipe for target 'drivers/usb' failed
make[6]: *** [drivers/usb] Error 2
Makefile:797: recipe for target 'drivers' failed
make[5]: *** [drivers] Error 2离线
cat: checkout: No such file or directory /* * f_rndis.c -- RNDIS link function driver * * Copyright (C) 2003-2005,2008 David Brownell * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger * Copyright (C) 2008 Nokia Corporation * Copyright (C) 2009 Samsung Electronics * Author: Michal Nazarewicz (mina86@mina86.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ /* #define VERBOSE_DEBUG */ #include <linux/slab.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/etherdevice.h> #include <linux/atomic.h> #include "u_ether.h" #include "rndis.h" /* * This function is an RNDIS Ethernet port -- a Microsoft protocol that's * been promoted instead of the standard CDC Ethernet. The published RNDIS * spec is ambiguous, incomplete, and needlessly complex. Variants such as * ActiveSync have even worse status in terms of specification. * * In short: it's a protocol controlled by (and for) Microsoft, not for an * Open ecosystem or markets. Linux supports it *only* because Microsoft * doesn't support the CDC Ethernet standard. * * The RNDIS data transfer model is complex, with multiple Ethernet packets * per USB message, and out of band data. The control model is built around * what's essentially an "RNDIS RPC" protocol. It's all wrapped in a CDC ACM * (modem, not Ethernet) veneer, with those ACM descriptors being entirely * useless (they're ignored). RNDIS expects to be the only function in its * configuration, so it's no real help if you need composite devices; and * it expects to be the first configuration too. * * There is a single technical advantage of RNDIS over CDC Ethernet, if you * discount the fluff that its RPC can be made to deliver: it doesn't need * a NOP altsetting for the data interface. That lets it work on some of the * "so smart it's stupid" hardware which takes over configuration changes * from the software, and adds restrictions like "no altsettings". * * Unfortunately MSFT's RNDIS drivers are buggy. They hang or oops, and * have all sorts of contrary-to-specification oddities that can prevent * them from working sanely. Since bugfixes (or accurate specs, letting * Linux work around those bugs) are unlikely to ever come from MSFT, you * may want to avoid using RNDIS on purely operational grounds. * * Omissions from the RNDIS 1.0 specification include: * * - Power management ... references data that's scattered around lots * of other documentation, which is incorrect/incomplete there too. * * - There are various undocumented protocol requirements, like the need * to send garbage in some control-OUT messages. * * - MS-Windows drivers sometimes emit undocumented requests. */ struct f_rndis { struct gether port; u8 ctrl_id, data_id; u8 ethaddr[ETH_ALEN]; u32 vendorID; const char *manufacturer; int config; struct usb_ep *notify; struct usb_request *notify_req; atomic_t notify_count; }; static inline struct f_rndis *func_to_rndis(struct usb_function *f) { return container_of(f, struct f_rndis, port.func); } /* peak (theoretical) bulk transfer rate in bits-per-second */ static unsigned int bitrate(struct usb_gadget *g) { if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER) return 13 * 1024 * 8 * 1000 * 8; else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) return 13 * 512 * 8 * 1000 * 8; else return 19 * 64 * 1 * 1000 * 8; } /*-------------------------------------------------------------------------*/ /* */ #define RNDIS_STATUS_INTERVAL_MS 32 #define STATUS_BYTECOUNT 8 /* 8 bytes data */ /* interface descriptor: */ static struct usb_interface_descriptor rndis_control_intf = { .bLength = sizeof rndis_control_intf, .bDescriptorType = USB_DT_INTERFACE, /* .bInterfaceNumber = DYNAMIC */ /* status endpoint is optional; this could be patched later */ .bNumEndpoints = 1, .bInterfaceClass = USB_CLASS_COMM, .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR, /* .iInterface = DYNAMIC */ }; static struct usb_cdc_header_desc header_desc = { .bLength = sizeof header_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = USB_CDC_HEADER_TYPE, .bcdCDC = cpu_to_le16(0x0110), }; static struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = { .bLength = sizeof call_mgmt_descriptor, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE, .bmCapabilities = 0x00, .bDataInterface = 0x01, }; static struct usb_cdc_acm_descriptor rndis_acm_descriptor = { .bLength = sizeof rndis_acm_descriptor, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = USB_CDC_ACM_TYPE, .bmCapabilities = 0x00, }; static struct usb_cdc_union_desc rndis_union_desc = { .bLength = sizeof(rndis_union_desc), .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubType = USB_CDC_UNION_TYPE, /* .bMasterInterface0 = DYNAMIC */ /* .bSlaveInterface0 = DYNAMIC */ }; /* the data interface has two bulk endpoints */ static struct usb_interface_descriptor rndis_data_intf = { .bLength = sizeof rndis_data_intf, .bDescriptorType = USB_DT_INTERFACE, /* .bInterfaceNumber = DYNAMIC */ .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_CDC_DATA, .bInterfaceSubClass = 0, .bInterfaceProtocol = 0, /* .iInterface = DYNAMIC */ }; static struct usb_interface_assoc_descriptor rndis_iad_descriptor = { .bLength = sizeof rndis_iad_descriptor, .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, .bFirstInterface = 0, /* XXX, hardcoded */ .bInterfaceCount = 2, // control + data .bFunctionClass = USB_CLASS_COMM, .bFunctionSubClass = USB_CDC_SUBCLASS_ETHERNET, .bFunctionProtocol = USB_CDC_PROTO_NONE, /* .iFunction = DYNAMIC */ }; /* full speed support: */ static struct usb_endpoint_descriptor fs_notify_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), .bInterval = RNDIS_STATUS_INTERVAL_MS, }; static struct usb_endpoint_descriptor fs_in_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, }; static struct usb_endpoint_descriptor fs_out_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, }; static struct usb_descriptor_header *eth_fs_function[] = { (struct usb_descriptor_header *) &rndis_iad_descriptor, /* control interface matches ACM, not Ethernet */ (struct usb_descriptor_header *) &rndis_control_intf, (struct usb_descriptor_header *) &header_desc, (struct usb_descriptor_header *) &call_mgmt_descriptor, (struct usb_descriptor_header *) &rndis_acm_descriptor, (struct usb_descriptor_header *) &rndis_union_desc, (struct usb_descriptor_header *) &fs_notify_desc, /* data interface has no altsetting */ (struct usb_descriptor_header *) &rndis_data_intf, (struct usb_descriptor_header *) &fs_in_desc, (struct usb_descriptor_header *) &fs_out_desc, NULL, }; /* high speed support: */ static struct usb_endpoint_descriptor hs_notify_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS) }; static struct usb_endpoint_descriptor hs_in_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(512), }; static struct usb_endpoint_descriptor hs_out_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(512), }; static struct usb_descriptor_header *eth_hs_function[] = { (struct usb_descriptor_header *) &rndis_iad_descriptor, /* control interface matches ACM, not Ethernet */ (struct usb_descriptor_header *) &rndis_control_intf, (struct usb_descriptor_header *) &header_desc, (struct usb_descriptor_header *) &call_mgmt_descriptor, (struct usb_descriptor_header *) &rndis_acm_descriptor, (struct usb_descriptor_header *) &rndis_union_desc, (struct usb_descriptor_header *) &hs_notify_desc, /* data interface has no altsetting */ (struct usb_descriptor_header *) &rndis_data_intf, (struct usb_descriptor_header *) &hs_in_desc, (struct usb_descriptor_header *) &hs_out_desc, NULL, }; /* super speed support: */ static struct usb_endpoint_descriptor ss_notify_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS) }; static struct usb_ss_ep_comp_descriptor ss_intr_comp_desc = { .bLength = sizeof ss_intr_comp_desc, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, /* the following 3 values can be tweaked if necessary */ /* .bMaxBurst = 0, */ /* .bmAttributes = 0, */ .wBytesPerInterval = cpu_to_le16(STATUS_BYTECOUNT), }; static struct usb_endpoint_descriptor ss_in_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(1024), }; static struct usb_endpoint_descriptor ss_out_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(1024), }; static struct usb_ss_ep_comp_descriptor ss_bulk_comp_desc = { .bLength = sizeof ss_bulk_comp_desc, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, /* the following 2 values can be tweaked if necessary */ /* .bMaxBurst = 0, */ /* .bmAttributes = 0, */ }; static struct usb_descriptor_header *eth_ss_function[] = { (struct usb_descriptor_header *) &rndis_iad_descriptor, /* control interface matches ACM, not Ethernet */ (struct usb_descriptor_header *) &rndis_control_intf, (struct usb_descriptor_header *) &header_desc, (struct usb_descriptor_header *) &call_mgmt_descriptor, (struct usb_descriptor_header *) &rndis_acm_descriptor, (struct usb_descriptor_header *) &rndis_union_desc, (struct usb_descriptor_header *) &ss_notify_desc, (struct usb_descriptor_header *) &ss_intr_comp_desc, /* data interface has no altsetting */ (struct usb_descriptor_header *) &rndis_data_intf, (struct usb_descriptor_header *) &ss_in_desc, (struct usb_descriptor_header *) &ss_bulk_comp_desc, (struct usb_descriptor_header *) &ss_out_desc, (struct usb_descriptor_header *) &ss_bulk_comp_desc, NULL, }; /* string descriptors: */ static struct usb_string rndis_string_defs[] = { [0].s = "RNDIS Communications Control", [1].s = "RNDIS Ethernet Data", [2].s = "RNDIS", { } /* end of list */ }; static struct usb_gadget_strings rndis_string_table = { .language = 0x0409, /* en-us */ .strings = rndis_string_defs, }; static struct usb_gadget_strings *rndis_strings[] = { &rndis_string_table, NULL, }; /*-------------------------------------------------------------------------*/ static struct sk_buff *rndis_add_header(struct gether *port, struct sk_buff *skb) { struct sk_buff *skb2; skb2 = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type)); if (skb2) rndis_add_hdr(skb2); dev_kfree_skb_any(skb); return skb2; } static void rndis_response_available(void *_rndis) { struct f_rndis *rndis = _rndis; struct usb_request *req = rndis->notify_req; struct usb_composite_dev *cdev = rndis->port.func.config->cdev; __le32 *data = req->buf; int status; if (atomic_inc_return(&rndis->notify_count) != 1) return; /* Send RNDIS RESPONSE_AVAILABLE notification; a * USB_CDC_NOTIFY_RESPONSE_AVAILABLE "should" work too * * This is the only notification defined by RNDIS. */ data[0] = cpu_to_le32(1); data[1] = cpu_to_le32(0); status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC); if (status) { atomic_dec(&rndis->notify_count); DBG(cdev, "notify/0 --> %d\n", status); } } static void rndis_response_complete(struct usb_ep *ep, struct usb_request *req) { struct f_rndis *rndis = req->context; struct usb_composite_dev *cdev = rndis->port.func.config->cdev; int status = req->status; /* after TX: * - USB_CDC_GET_ENCAPSULATED_RESPONSE (ep0/control) * - RNDIS_RESPONSE_AVAILABLE (status/irq) */ switch (status) { case -ECONNRESET: case -ESHUTDOWN: /* connection gone */ atomic_set(&rndis->notify_count, 0); break; default: DBG(cdev, "RNDIS %s response error %d, %d/%d\n", ep->name, status, req->actual, req->length); /* FALLTHROUGH */ case 0: if (ep != rndis->notify) break; /* handle multiple pending RNDIS_RESPONSE_AVAILABLE * notifications by resending until we're done */ if (atomic_dec_and_test(&rndis->notify_count)) break; status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC); if (status) { atomic_dec(&rndis->notify_count); DBG(cdev, "notify/1 --> %d\n", status); } break; } } static void rndis_command_complete(struct usb_ep *ep, struct usb_request *req) { struct f_rndis *rndis = req->context; int status; /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */ // spin_lock(&dev->lock); status = rndis_msg_parser(rndis->config, (u8 *) req->buf); if (status < 0) pr_err("RNDIS command error %d, %d/%d\n", status, req->actual, req->length); // spin_unlock(&dev->lock); } static int rndis_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) { struct f_rndis *rndis = func_to_rndis(f); struct usb_composite_dev *cdev = f->config->cdev; struct usb_request *req = cdev->req; int value = -EOPNOTSUPP; u16 w_index = le16_to_cpu(ctrl->wIndex); u16 w_value = le16_to_cpu(ctrl->wValue); u16 w_length = le16_to_cpu(ctrl->wLength); /* composite driver infrastructure handles everything except * CDC class messages; interface activation uses set_alt(). */ switch ((ctrl->bRequestType << 8) | ctrl->bRequest) { /* RNDIS uses the CDC command encapsulation mechanism to implement * an RPC scheme, with much getting/setting of attributes by OID. */ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | USB_CDC_SEND_ENCAPSULATED_COMMAND: if (w_value || w_index != rndis->ctrl_id) goto invalid; /* read the request; process it later */ value = w_length; req->complete = rndis_command_complete; req->context = rndis; /* later, rndis_response_available() sends a notification */ break; case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | USB_CDC_GET_ENCAPSULATED_RESPONSE: if (w_value || w_index != rndis->ctrl_id) goto invalid; else { u8 *buf; u32 n; /* return the result */ buf = rndis_get_next_response(rndis->config, &n); if (buf) { memcpy(req->buf, buf, n); req->complete = rndis_response_complete; req->context = rndis; rndis_free_response(rndis->config, buf); value = n; } /* else stalls ... spec says to avoid that */ } break; default: invalid: VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", ctrl->bRequestType, ctrl->bRequest, w_value, w_index, w_length); } /* respond with data transfer or status phase? */ if (value >= 0) { DBG(cdev, "rndis req%02x.%02x v%04x i%04x l%d\n", ctrl->bRequestType, ctrl->bRequest, w_value, w_index, w_length); req->zero = (value < w_length); req->length = value; value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); if (value < 0) ERROR(cdev, "rndis response on err %d\n", value); } /* device either stalls (value < 0) or reports success */ return value; } static int rndis_set_alt(struct usb_function *f, unsigned intf, unsigned alt) { struct f_rndis *rndis = func_to_rndis(f); struct usb_composite_dev *cdev = f->config->cdev; /* we know alt == 0 */ if (intf == rndis->ctrl_id) { if (rndis->notify->driver_data) { VDBG(cdev, "reset rndis control %d\n", intf); usb_ep_disable(rndis->notify); } if (!rndis->notify->desc) { VDBG(cdev, "init rndis ctrl %d\n", intf); if (config_ep_by_speed(cdev->gadget, f, rndis->notify)) goto fail; } usb_ep_enable(rndis->notify); rndis->notify->driver_data = rndis; } else if (intf == rndis->data_id) { struct net_device *net; if (rndis->port.in_ep->driver_data) { DBG(cdev, "reset rndis\n"); gether_disconnect(&rndis->port); } if (!rndis->port.in_ep->desc || !rndis->port.out_ep->desc) { DBG(cdev, "init rndis\n"); if (config_ep_by_speed(cdev->gadget, f, rndis->port.in_ep) || config_ep_by_speed(cdev->gadget, f, rndis->port.out_ep)) { rndis->port.in_ep->desc = NULL; rndis->port.out_ep->desc = NULL; goto fail; } } /* Avoid ZLPs; they can be troublesome. */ rndis->port.is_zlp_ok = false; /* RNDIS should be in the "RNDIS uninitialized" state, * either never activated or after rndis_uninit(). * * We don't want data to flow here until a nonzero packet * filter is set, at which point it enters "RNDIS data * initialized" state ... but we do want the endpoints * to be activated. It's a strange little state. * * REVISIT the RNDIS gadget code has done this wrong for a * very long time. We need another call to the link layer * code -- gether_updown(...bool) maybe -- to do it right. */ rndis->port.cdc_filter = 0; DBG(cdev, "RNDIS RX/TX early activation ... \n"); net = gether_connect(&rndis->port); if (IS_ERR(net)) return PTR_ERR(net); rndis_set_param_dev(rndis->config, net, &rndis->port.cdc_filter); } else goto fail; return 0; fail: return -EINVAL; } static void rndis_disable(struct usb_function *f) { struct f_rndis *rndis = func_to_rndis(f); struct usb_composite_dev *cdev = f->config->cdev; if (!rndis->notify->driver_data) return; DBG(cdev, "rndis deactivated\n"); rndis_uninit(rndis->config); gether_disconnect(&rndis->port); usb_ep_disable(rndis->notify); rndis->notify->driver_data = NULL; } /*-------------------------------------------------------------------------*/ /* * This isn't quite the same mechanism as CDC Ethernet, since the * notification scheme passes less data, but the same set of link * states must be tested. A key difference is that altsettings are * not used to tell whether the link should send packets or not. */ static void rndis_open(struct gether *geth) { struct f_rndis *rndis = func_to_rndis(&geth->func); struct usb_composite_dev *cdev = geth->func.config->cdev; DBG(cdev, "%s\n", __func__); rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, bitrate(cdev->gadget) / 100); rndis_signal_connect(rndis->config); } static void rndis_close(struct gether *geth) { struct f_rndis *rndis = func_to_rndis(&geth->func); DBG(geth->func.config->cdev, "%s\n", __func__); rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0); rndis_signal_disconnect(rndis->config); } /*-------------------------------------------------------------------------*/ /* ethernet function driver setup/binding */ static int rndis_bind(struct usb_configuration *c, struct usb_function *f) { struct usb_composite_dev *cdev = c->cdev; struct f_rndis *rndis = func_to_rndis(f); int status; struct usb_ep *ep; /* allocate instance-specific interface IDs */ status = usb_interface_id(c, f); if (status < 0) goto fail; rndis->ctrl_id = status; rndis_iad_descriptor.bFirstInterface = status; rndis_control_intf.bInterfaceNumber = status; rndis_union_desc.bMasterInterface0 = status; status = usb_interface_id(c, f); if (status < 0) goto fail; rndis->data_id = status; rndis_data_intf.bInterfaceNumber = status; rndis_union_desc.bSlaveInterface0 = status; status = -ENODEV; /* allocate instance-specific endpoints */ ep = usb_ep_autoconfig(cdev->gadget, &fs_in_desc); if (!ep) goto fail; rndis->port.in_ep = ep; ep->driver_data = cdev; /* claim */ ep = usb_ep_autoconfig(cdev->gadget, &fs_out_desc); if (!ep) goto fail; rndis->port.out_ep = ep; ep->driver_data = cdev; /* claim */ /* NOTE: a status/notification endpoint is, strictly speaking, * optional. We don't treat it that way though! It's simpler, * and some newer profiles don't treat it as optional. */ ep = usb_ep_autoconfig(cdev->gadget, &fs_notify_desc); if (!ep) goto fail; rndis->notify = ep; ep->driver_data = cdev; /* claim */ status = -ENOMEM; /* allocate notification request and buffer */ rndis->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL); if (!rndis->notify_req) goto fail; rndis->notify_req->buf = kmalloc(STATUS_BYTECOUNT, GFP_KERNEL); if (!rndis->notify_req->buf) goto fail; rndis->notify_req->length = STATUS_BYTECOUNT; rndis->notify_req->context = rndis; rndis->notify_req->complete = rndis_response_complete; /* support all relevant hardware speeds... we expect that when * hardware is dual speed, all bulk-capable endpoints work at * both speeds */ hs_in_desc.bEndpointAddress = fs_in_desc.bEndpointAddress; hs_out_desc.bEndpointAddress = fs_out_desc.bEndpointAddress; hs_notify_desc.bEndpointAddress = fs_notify_desc.bEndpointAddress; ss_in_desc.bEndpointAddress = fs_in_desc.bEndpointAddress; ss_out_desc.bEndpointAddress = fs_out_desc.bEndpointAddress; ss_notify_desc.bEndpointAddress = fs_notify_desc.bEndpointAddress; status = usb_assign_descriptors(f, eth_fs_function, eth_hs_function, eth_ss_function); if (status) goto fail; rndis->port.open = rndis_open; rndis->port.close = rndis_close; status = rndis_register(rndis_response_available, rndis); if (status < 0) goto fail; rndis->config = status; rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0); rndis_set_host_mac(rndis->config, rndis->ethaddr); if (rndis->manufacturer && rndis->vendorID && rndis_set_param_vendor(rndis->config, rndis->vendorID, rndis->manufacturer)) goto fail; /* NOTE: all that is done without knowing or caring about * the network link ... which is unavailable to this code * until we're activated via set_alt(). */ DBG(cdev, "RNDIS: %s speed IN/%s OUT/%s NOTIFY/%s\n", gadget_is_superspeed(c->cdev->gadget) ? "super" : gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full", rndis->port.in_ep->name, rndis->port.out_ep->name, rndis->notify->name); return 0; fail: usb_free_all_descriptors(f); if (rndis->notify_req) { kfree(rndis->notify_req->buf); usb_ep_free_request(rndis->notify, rndis->notify_req); } /* we might as well release our claims on endpoints */ if (rndis->notify) rndis->notify->driver_data = NULL; if (rndis->port.out_ep) rndis->port.out_ep->driver_data = NULL; if (rndis->port.in_ep) rndis->port.in_ep->driver_data = NULL; ERROR(cdev, "%s: can't bind, err %d\n", f->name, status); return status; } static void rndis_unbind(struct usb_configuration *c, struct usb_function *f) { struct f_rndis *rndis = func_to_rndis(f); rndis_deregister(rndis->config); rndis_exit(); rndis_string_defs[0].id = 0; usb_free_all_descriptors(f); kfree(rndis->notify_req->buf); usb_ep_free_request(rndis->notify, rndis->notify_req); kfree(rndis); } /* Some controllers can't support RNDIS ... */ static inline bool can_support_rndis(struct usb_configuration *c) { /* everything else is *presumably* fine */ return true; } int rndis_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN], u32 vendorID, const char *manufacturer, struct eth_dev *dev) { struct f_rndis *rndis; int status; if (!can_support_rndis(c) || !ethaddr) return -EINVAL; if (rndis_string_defs[0].id == 0) { /* ... and setup RNDIS itself */ status = rndis_init(); if (status < 0) return status; status = usb_string_ids_tab(c->cdev, rndis_string_defs); if (status) return status; rndis_control_intf.iInterface = rndis_string_defs[0].id; rndis_data_intf.iInterface = rndis_string_defs[1].id; rndis_iad_descriptor.iFunction = rndis_string_defs[2].id; } /* allocate and initialize one new instance */ status = -ENOMEM; rndis = kzalloc(sizeof *rndis, GFP_KERNEL); if (!rndis) goto fail; memcpy(rndis->ethaddr, ethaddr, ETH_ALEN); rndis->vendorID = vendorID; rndis->manufacturer = manufacturer; rndis->port.ioport = dev; /* RNDIS activates when the host changes this filter */ rndis->port.cdc_filter = 0; /* RNDIS has special (and complex) framing */ rndis->port.header_len = sizeof(struct rndis_packet_msg_type); rndis->port.wrap = rndis_add_header; rndis->port.unwrap = rndis_rm_hdr; rndis->port.func.name = "rndis"; rndis->port.func.strings = rndis_strings; /* descriptors are per-instance copies */ rndis->port.func.bind = rndis_bind; rndis->port.func.unbind = rndis_unbind; rndis->port.func.set_alt = rndis_set_alt; rndis->port.func.setup = rndis_setup; rndis->port.func.disable = rndis_disable; status = usb_add_function(c, &rndis->port.func); if (status) { kfree(rndis); fail: rndis_exit(); } return status; }直接替换这个文件试一试: drivers/usb/gadget/f_rndis.c
大佬，你是将下面这部分的定义和有关rndis_dl_max_pkt_per_xfer 这个变量的部分去掉了吧，这样做的话有什么影响吗
static unsigned int rndis_dl_max_pkt_per_xfer = 3;
// module_param(rndis_dl_max_pkt_per_xfer, uint, S_IRUGO | S_IWUSR);
// MODULE_PARM_DESC(rndis_dl_max_pkt_per_xfer,
// "Maximum packets per transfer for DL aggregation");
static unsigned int rndis_ul_max_pkt_per_xfer = 3;
// module_param(rndis_ul_max_pkt_per_xfer, uint, S_IRUGO | S_IWUSR);
// MODULE_PARM_DESC(rndis_ul_max_pkt_per_xfer,
// "Maximum packets per transfer for UL aggregation");离线