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Wed, 14 Oct 2026 07:50:18 +0000 From: Jamin Lin To: "marcandre.lureau@redhat.com" , =?iso-8859-1?Q?C=E9dric_Le_Goater?= , Peter Maydell , Steven Lee , Troy Lee , Kane Chen , Andrew Jeffery , Joel Stanley , "open list:ASPEED BMCs" , "open list:All patches CC here" CC: Jamin Lin , Troy Lee Subject: [PATCH v4 5/8] hw/usb/redirect-server: Implement control transfers Thread-Topic: [PATCH v4 5/8] hw/usb/redirect-server: Implement control transfers Thread-Index: AQHdW7CnIViP0saOuk2+6qsFWRYCWQ== Date: Wed, 14 Oct 2026 07:50:18 +0000 Message-ID: <20261014075011.2708115-6-jamin_lin@aspeedtech.com> References: <20261014075011.2708115-1-jamin_lin@aspeedtech.com> In-Reply-To: <20261014075011.2708115-1-jamin_lin@aspeedtech.com> Accept-Language: zh-TW, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: mx.microsoft.com 1; dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=aspeedtech.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SEZPR06MB7362:EE_|SEYPR06MB6864:EE_ x-ms-office365-filtering-correlation-id: ba9bbde1-e9ab-4cdb-be5f-08df29c7ca8b x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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envelope-from=jamin_lin@aspeedtech.com; helo=OS8PR02CU002.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The host sends a control_packet. Turn it into the SETUP, DATA and=0A= STATUS tokens the QEMU USB core wants, run them on the device, and=0A= send the answer back.=0A= =0A= The device may answer later, so we have to remember the packets we=0A= sent. Each one stays on a list until it comes back. We drop the whole=0A= list on a bus reset or a chardev close. When the host asks us to=0A= cancel a packet, we answer it and drop it.=0A= =0A= usbredir has its own messages for set_configuration, get_configuration,=0A= set_alt_setting and get_alt_setting. Each one is a control transfer, so=0A= run it like one and send back the status message.=0A= =0A= usbredir wants an ep_info message. It says what kind each endpoint is,=0A= how big its packets are and which interface it belongs to. QEMU cannot=0A= tell us. It only knows after it has read the device's descriptors, and=0A= it never reads them for a device that just forwards transfers. So we=0A= read them ourselves: the configuration descriptor passes through us on=0A= its way to the host.=0A= =0A= A device can offer several configurations, and an interface several=0A= alternate settings, each with its own endpoints. Keep every=0A= configuration descriptor, build the table from the one the host=0A= selected, and send a fresh ep_info when that selection changes, so=0A= ep_info never describes an endpoint that is not there.=0A= =0A= Signed-off-by: Jamin Lin =0A= ---=0A= hw/usb/redirect-server.c | 752 ++++++++++++++++++++++++++++++++++++++-=0A= hw/usb/trace-events | 9 +=0A= 2 files changed, 760 insertions(+), 1 deletion(-)=0A= =0A= diff --git a/hw/usb/redirect-server.c b/hw/usb/redirect-server.c=0A= index 05ee0f3873..a8647b5efc 100644=0A= --- a/hw/usb/redirect-server.c=0A= +++ b/hw/usb/redirect-server.c=0A= @@ -63,9 +63,11 @@=0A= #include "qom/object.h"=0A= =0A= #include =0A= +#include =0A= =0A= #include "hw/core/qdev-properties.h"=0A= #include "hw/core/qdev-properties-system.h"=0A= +#include "desc.h"=0A= #include "trace.h"=0A= =0A= #define TYPE_USB_REDIR_SERVER "x-usb-redir-server"=0A= @@ -73,6 +75,41 @@ OBJECT_DECLARE_SIMPLE_TYPE(USBRedirServer, USB_REDIR_SER= VER)=0A= =0A= #define USBREDIR_SERVER_VERSION "qemu " TYPE_USB_REDIR_SERVER " " QEMU_VER= SION=0A= =0A= +/*=0A= + * The usbredir ep_info message has one slot per endpoint and direction.= =0A= + * Index 0-15 are the OUT endpoints, 16-31 the IN ones.=0A= + */=0A= +#define USBREDIR_SERVER_MAX_EP 32=0A= +#define USBREDIR_SERVER_EP_IN_BASE 16=0A= +=0A= +#define USBREDIR_SERVER_CTRL_SETUP 0=0A= +#define USBREDIR_SERVER_CTRL_STATUS 1=0A= +=0A= +/* Which message answers the host when a control transfer ends. */=0A= +typedef enum {=0A= + USBREDIR_SERVER_REPLY_CONTROL,=0A= + USBREDIR_SERVER_REPLY_CONFIG,=0A= + USBREDIR_SERVER_REPLY_ALT,=0A= +} USBRedirServerReply;=0A= +=0A= +typedef struct USBRedirServerPkt {=0A= + USBPacket pkt;=0A= +=0A= + /* Saved headers for the usbredir response */=0A= + struct usb_redir_control_packet_header ctrl_hdr;=0A= +=0A= + /*=0A= + * The IOV points here. IN data lands in it, OUT data is copied in.=0A= + * Allocated and freed with the packet; data_size is how big it is.=0A= + */=0A= + uint8_t *data;=0A= + int data_size;=0A= + QTAILQ_ENTRY(USBRedirServerPkt) next;=0A= + USBRedirServerReply reply;=0A= + uint64_t redir_id;=0A= + int type;=0A= +} USBRedirServerPkt;=0A= +=0A= struct USBRedirServer {=0A= SysBusDevice parent_obj;=0A= =0A= @@ -92,8 +129,27 @@ struct USBRedirServer {=0A= guint watch;=0A= bool host_connected;=0A= bool device_announced;=0A= +=0A= + /* In-flight packet tracking */=0A= + QTAILQ_HEAD(, USBRedirServerPkt) inflight;=0A= + uint64_t next_id;=0A= +=0A= + /* Endpoint tables for the usbredir ep_info message. */=0A= + uint8_t ep_type[USBREDIR_SERVER_MAX_EP];=0A= + uint16_t ep_max_packet[USBREDIR_SERVER_MAX_EP];=0A= + uint8_t ep_interval[USBREDIR_SERVER_MAX_EP];=0A= + uint8_t ep_iface[USBREDIR_SERVER_MAX_EP];=0A= +=0A= + uint8_t alt_setting[USB_MAX_INTERFACES];=0A= + GHashTable *config_descs;=0A= + uint8_t config_value;=0A= };=0A= =0A= +static void usbredir_server_pkt_free(USBRedirServerPkt *rp);=0A= +static void usbredir_server_stop_transfers(USBRedirServer *s);=0A= +static void usbredir_server_send_cancelled(USBRedirServer *s,=0A= + USBRedirServerPkt *rp);=0A= +=0A= /*=0A= * The device is whatever USBDevice the user plugged into our port with=0A= * "-device ,bus=3D.0". NULL until then.=0A= @@ -104,9 +160,171 @@ static USBDevice *usbredir_server_device(USBRedirServ= er *s)=0A= }=0A= =0A= /*=0A= - * Device announcement=0A= + * Descriptor snooping and device announcement=0A= */=0A= =0A= +static void usbredir_server_record_endpoint(USBRedirServer *s,=0A= + const USBDescriptor *desc,=0A= + uint8_t iface)=0A= +{=0A= + uint8_t addr;=0A= + int ep_nr;=0A= + int idx;=0A= +=0A= + addr =3D desc->u.endpoint.bEndpointAddress;=0A= + ep_nr =3D addr & 0x0f;=0A= + idx =3D (addr & USB_DIR_IN) ? ep_nr + USBREDIR_SERVER_EP_IN_BASE : ep_= nr;=0A= + if (ep_nr < 1 || idx >=3D USBREDIR_SERVER_MAX_EP) {=0A= + trace_usbredir_server_endpoint_dropped(addr);=0A= + return;=0A= + }=0A= +=0A= + s->ep_type[idx] =3D desc->u.endpoint.bmAttributes & 0x03;=0A= + s->ep_max_packet[idx] =3D (desc->u.endpoint.wMaxPacketSize_hi << 8) |= =0A= + desc->u.endpoint.wMaxPacketSize_lo;=0A= + s->ep_interval[idx] =3D desc->u.endpoint.bInterval;=0A= + s->ep_iface[idx] =3D iface;=0A= +=0A= + /*=0A= + * bInterval says how often to poll this endpoint. Pass on what the=0A= + * descriptor said, but never 0 for an interrupt or isochronous=0A= + * endpoint: redirect.c throws the whole device away when it sees 0,= =0A= + * so store 1 instead.=0A= + */=0A= + if (s->ep_interval[idx] =3D=3D 0 &&=0A= + (s->ep_type[idx] =3D=3D USB_ENDPOINT_XFER_INT ||=0A= + s->ep_type[idx] =3D=3D USB_ENDPOINT_XFER_ISOC)) {=0A= + s->ep_interval[idx] =3D 1;=0A= + }=0A= +}=0A= +=0A= +static void usbredir_server_save_config_desc(USBRedirServer *s,=0A= + const uint8_t *data, int len)= =0A= +{=0A= + const USBDescriptor *conf =3D (const USBDescriptor *)data;=0A= + uint16_t total;=0A= +=0A= + if (len < 4) {=0A= + return;=0A= + }=0A= + total =3D lduw_le_p(data + 2);=0A= +=0A= + /*=0A= + * The host reads this twice. The first read is a few bytes, just to= =0A= + * learn the length from wTotalLength. The second read has the whole= =0A= + * descriptor.=0A= + *=0A= + * A configuration descriptor is 9 bytes, so a shorter one is broken.= =0A= + */=0A= + if (total < 9 || len < total) {=0A= + return;=0A= + }=0A= +=0A= + g_hash_table_insert(s->config_descs,=0A= + GUINT_TO_POINTER(conf->u.config.bConfigurationValu= e),=0A= + g_memdup2(data, total));=0A= +}=0A= +=0A= +/*=0A= + * Some devices only forward transfers. They never read their own=0A= + * descriptors, so the USB core leaves their endpoint types at=0A= + * USB_ENDPOINT_XFER_INVALID. Sending that in ep_info does not work: the= =0A= + * host sees type 255 and will not move data. So read the configuration=0A= + * descriptor and fill the tables here.=0A= + *=0A= + * Only what the host selected counts. A device can offer several=0A= + * configurations, and an interface several alternate settings. The=0A= + * endpoints of the ones not chosen are not there.=0A= + */=0A= +static void usbredir_server_build_ep_tables(USBRedirServer *s)=0A= +{=0A= + const USBDescriptor *desc;=0A= + const uint8_t *config;=0A= + bool active =3D false;=0A= + uint8_t iface =3D 0;=0A= + uint8_t alt;=0A= + int i =3D 0;=0A= + int total;=0A= +=0A= + memset(s->ep_type, USB_ENDPOINT_XFER_INVALID, sizeof(s->ep_type));=0A= + memset(s->ep_max_packet, 0, sizeof(s->ep_max_packet));=0A= + memset(s->ep_interval, 0, sizeof(s->ep_interval));=0A= + memset(s->ep_iface, 0, sizeof(s->ep_iface));=0A= +=0A= + config =3D g_hash_table_lookup(s->config_descs,=0A= + GUINT_TO_POINTER(s->config_value));=0A= + if (!config) {=0A= + trace_usbredir_server_config_not_found(=0A= + s->config_value, g_hash_table_size(s->config_descs));=0A= + return;=0A= + }=0A= + total =3D lduw_le_p(config + 2);=0A= +=0A= + while (i + 2 <=3D total) {=0A= + desc =3D (const USBDescriptor *)(config + i);=0A= +=0A= + if (desc->bLength < 2) {=0A= + trace_usbredir_server_bad_descriptor(i, desc->bLength,=0A= + desc->bDescriptorType);= =0A= + break;=0A= + }=0A= + if (i + desc->bLength > total) {=0A= + trace_usbredir_server_descriptor_overrun(i, desc->bLength, tot= al);=0A= + break;=0A= + }=0A= +=0A= + switch (desc->bDescriptorType) {=0A= + case USB_DT_INTERFACE:=0A= + if (desc->bLength < 9) {=0A= + trace_usbredir_server_bad_descriptor(i, desc->bLength,=0A= + desc->bDescriptorType= );=0A= + break;=0A= + }=0A= + iface =3D desc->u.interface.bInterfaceNumber;=0A= + alt =3D desc->u.interface.bAlternateSetting;=0A= + active =3D iface < USB_MAX_INTERFACES &&=0A= + alt =3D=3D s->alt_setting[iface];=0A= + break;=0A= + case USB_DT_ENDPOINT:=0A= + if (desc->bLength < 7) {=0A= + trace_usbredir_server_bad_descriptor(i, desc->bLength,=0A= + desc->bDescriptorType= );=0A= + break;=0A= + }=0A= + if (active) {=0A= + usbredir_server_record_endpoint(s, desc, iface);=0A= + }=0A= + break;=0A= + }=0A= +=0A= + i +=3D desc->bLength;=0A= + }=0A= +}=0A= +=0A= +static void usbredir_server_send_ep_info(USBRedirServer *s)=0A= +{=0A= + struct usb_redir_ep_info_header ep_info =3D {};=0A= + int i;=0A= +=0A= + usbredir_server_build_ep_tables(s);=0A= +=0A= + for (i =3D 0; i < USBREDIR_SERVER_MAX_EP; i++) {=0A= + ep_info.type[i] =3D s->ep_type[i];=0A= + ep_info.max_packet_size[i] =3D s->ep_max_packet[i];=0A= + ep_info.interface[i] =3D s->ep_iface[i];=0A= + ep_info.interval[i] =3D s->ep_interval[i];=0A= + if (s->ep_type[i] !=3D USB_ENDPOINT_XFER_INVALID) {=0A= + trace_usbredir_server_ep_info(i, ep_info.type[i],=0A= + ep_info.max_packet_size[i],=0A= + ep_info.interval[i],=0A= + ep_info.interface[i]);=0A= + }=0A= + }=0A= +=0A= + usbredirparser_send_ep_info(s->parser, &ep_info);=0A= + usbredirparser_do_write(s->parser);=0A= +}=0A= +=0A= static uint8_t usbredir_server_speed(USBDevice *device)=0A= {=0A= switch (device->speed) {=0A= @@ -145,6 +363,165 @@ static void usbredir_server_announce_device(USBRedirS= erver *s)=0A= trace_usbredir_server_announce(conn.speed);=0A= usbredirparser_send_device_connect(s->parser, &conn);=0A= usbredirparser_do_write(s->parser);=0A= +=0A= + usbredir_server_send_ep_info(s);=0A= +}=0A= +=0A= +/*=0A= + * Packet completion=0A= + */=0A= +=0A= +static uint8_t usbredir_server_status(int status)=0A= +{=0A= + switch (status) {=0A= + case USB_RET_SUCCESS:=0A= + return usb_redir_success;=0A= + case USB_RET_STALL:=0A= + return usb_redir_stall;=0A= + case USB_RET_BABBLE:=0A= + return usb_redir_babble;=0A= + default:=0A= + return usb_redir_ioerror;=0A= + }=0A= +}=0A= +=0A= +/*=0A= + * The device answered the setup token of an IN control request. What it= =0A= + * wants to send is now in device->data_buf, so run the data and status=0A= + * stages and pass the answer to the host.=0A= + *=0A= + * Each stage reuses rp->pkt, and usb_packet_setup() asserts iov->iov is= =0A= + * not NULL, so call qemu_iovec_init() before every stage.=0A= + */=0A= +static void usbredir_server_ctrl_setup_complete(USBRedirServer *s,=0A= + USBRedirServerPkt *rp)=0A= +{=0A= + struct usb_redir_control_packet_header resp =3D rp->ctrl_hdr;=0A= + struct usb_redir_configuration_status_header cfg =3D {};=0A= + struct usb_redir_alt_setting_status_header alt =3D {=0A= + .interface =3D rp->ctrl_hdr.index,=0A= + };=0A= + USBDevice *device =3D usbredir_server_device(s);=0A= + USBEndpoint *ep_out =3D usb_ep_get(device, USB_TOKEN_OUT, 0);=0A= + USBEndpoint *ep_in =3D usb_ep_get(device, USB_TOKEN_IN, 0);=0A= + uint8_t status =3D usbredir_server_status(rp->pkt.status);=0A= + int actual =3D 0;=0A= +=0A= + if (rp->pkt.status =3D=3D USB_RET_SUCCESS) {=0A= + /* Data stage: the core copies device->data_buf into our buffer. *= /=0A= + qemu_iovec_init(&rp->pkt.iov, 1);=0A= + usb_packet_setup(&rp->pkt, USB_TOKEN_IN, ep_in,=0A= + 0, s->next_id++, false, false);=0A= + usb_packet_addbuf(&rp->pkt, rp->data, rp->data_size);=0A= + usb_handle_packet(device, &rp->pkt);=0A= + actual =3D rp->pkt.actual_length;=0A= + usb_packet_cleanup(&rp->pkt);=0A= +=0A= + /* Status stage: tell the device we got it. Its EP0 goes idle. */= =0A= + qemu_iovec_init(&rp->pkt.iov, 1);=0A= + usb_packet_setup(&rp->pkt, USB_TOKEN_OUT, ep_out,=0A= + 0, s->next_id++, false, false);=0A= + usb_handle_packet(device, &rp->pkt);=0A= + usb_packet_cleanup(&rp->pkt);=0A= +=0A= + if (rp->ctrl_hdr.request =3D=3D USB_REQ_GET_DESCRIPTOR &&=0A= + (rp->ctrl_hdr.value >> 8) =3D=3D USB_DT_CONFIG && actual > 0) = {=0A= + usbredir_server_save_config_desc(s, rp->data, actual);=0A= + }=0A= + }=0A= +=0A= + trace_usbredir_server_ctrl_setup_complete(rp->redir_id, status,=0A= + actual);=0A= +=0A= + switch (rp->reply) {=0A= + case USBREDIR_SERVER_REPLY_CONTROL:=0A= + resp.status =3D status;=0A= + resp.length =3D actual;=0A= + usbredirparser_send_control_packet(s->parser, rp->redir_id, &resp,= =0A= + actual > 0 ? rp->data : NULL,= =0A= + actual);=0A= + break;=0A= + case USBREDIR_SERVER_REPLY_CONFIG:=0A= + cfg.status =3D status;=0A= + cfg.configuration =3D actual > 0 ? rp->data[0] : 0;=0A= + usbredirparser_send_configuration_status(s->parser, rp->redir_id,= =0A= + &cfg);=0A= + break;=0A= + case USBREDIR_SERVER_REPLY_ALT:=0A= + alt.status =3D status;=0A= + alt.alt =3D actual > 0 ? rp->data[0] : 0;=0A= + usbredirparser_send_alt_setting_status(s->parser, rp->redir_id,=0A= + &alt);=0A= + break;=0A= + }=0A= + usbredirparser_do_write(s->parser);=0A= +}=0A= +=0A= +/*=0A= + * The status stage of an OUT control request finished, so the device is= =0A= + * done. Tell the host how it went, with whichever message it is waiting= =0A= + * for.=0A= + */=0A= +static void usbredir_server_ctrl_status_complete(USBRedirServer *s,=0A= + USBRedirServerPkt *rp)=0A= +{=0A= + struct usb_redir_control_packet_header resp =3D rp->ctrl_hdr;=0A= + uint8_t status =3D usbredir_server_status(rp->pkt.status);=0A= + struct usb_redir_configuration_status_header cfg =3D {=0A= + .configuration =3D rp->ctrl_hdr.value,=0A= + };=0A= + struct usb_redir_alt_setting_status_header alt =3D {=0A= + .interface =3D rp->ctrl_hdr.index,=0A= + .alt =3D rp->ctrl_hdr.value,=0A= + };=0A= +=0A= + trace_usbredir_server_ctrl_status_complete(rp->redir_id, status);=0A= +=0A= + switch (rp->reply) {=0A= + case USBREDIR_SERVER_REPLY_CONTROL:=0A= + resp.status =3D status;=0A= + resp.length =3D 0;=0A= + usbredirparser_send_control_packet(s->parser, rp->redir_id,=0A= + &resp, NULL, 0);=0A= + break;=0A= + case USBREDIR_SERVER_REPLY_CONFIG:=0A= + cfg.status =3D status;=0A= + usbredirparser_send_configuration_status(s->parser, rp->redir_id,= =0A= + &cfg);=0A= + break;=0A= + case USBREDIR_SERVER_REPLY_ALT:=0A= + alt.status =3D status;=0A= + usbredirparser_send_alt_setting_status(s->parser, rp->redir_id,=0A= + &alt);=0A= + break;=0A= + }=0A= + usbredirparser_do_write(s->parser);=0A= +=0A= + if (status !=3D usb_redir_success) {=0A= + return;=0A= + }=0A= +=0A= + /*=0A= + * Two requests change which endpoints exist. SET_CONFIGURATION picks= =0A= + * a configuration, SET_INTERFACE picks an alternate setting. Record= =0A= + * what the host chose, then send a fresh ep_info.=0A= + */=0A= + switch ((rp->ctrl_hdr.requesttype << 8) | rp->ctrl_hdr.request) {=0A= + case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:=0A= + /* A new configuration puts every interface back on alternate 0. *= /=0A= + s->config_value =3D rp->ctrl_hdr.value;=0A= + memset(s->alt_setting, 0, sizeof(s->alt_setting));=0A= + break;=0A= + case InterfaceOutRequest | USB_REQ_SET_INTERFACE:=0A= + if (rp->ctrl_hdr.index < USB_MAX_INTERFACES) {=0A= + s->alt_setting[rp->ctrl_hdr.index] =3D rp->ctrl_hdr.value;=0A= + }=0A= + break;=0A= + default:=0A= + return;=0A= + }=0A= +=0A= + usbredir_server_send_ep_info(s);=0A= }=0A= =0A= /*=0A= @@ -165,12 +542,23 @@ static void usbredir_server_port_detach(USBPort *port= )=0A= =0A= trace_usbredir_server_detach(s->device_announced);=0A= =0A= + usbredir_server_stop_transfers(s);=0A= +=0A= if (s->host_connected && s->parser && s->device_announced) {=0A= trace_usbredir_server_disconnect();=0A= usbredirparser_send_device_disconnect(s->parser);=0A= usbredirparser_do_write(s->parser);=0A= }=0A= s->device_announced =3D false;=0A= +=0A= + /* Clear the endpoint tables: they belong to the device that is leavin= g. */=0A= + memset(s->ep_type, USB_ENDPOINT_XFER_INVALID, sizeof(s->ep_type));=0A= + memset(s->ep_max_packet, 0, sizeof(s->ep_max_packet));=0A= + memset(s->ep_interval, 0, sizeof(s->ep_interval));=0A= + memset(s->ep_iface, 0, sizeof(s->ep_iface));=0A= + memset(s->alt_setting, 0, sizeof(s->alt_setting));=0A= + g_hash_table_remove_all(s->config_descs);=0A= + s->config_value =3D 0;=0A= }=0A= =0A= static void usbredir_server_port_child_detach(USBPort *port, USBDevice *ch= ild)=0A= @@ -183,11 +571,42 @@ static void usbredir_server_port_wakeup(USBPort *port= )=0A= /* We do not pass remote wakeup to the host. Nothing to do. */=0A= }=0A= =0A= +/*=0A= + * The core calls this for a packet the device answered with=0A= + * USB_RET_ASYNC. usbredir_server_submit_to_device() calls it for the rest= .=0A= + */=0A= +static void usbredir_server_packet_complete(USBPort *port, USBPacket *p)= =0A= +{=0A= + USBRedirServer *s =3D port->opaque;=0A= + USBRedirServerPkt *rp =3D container_of(p, USBRedirServerPkt, pkt);=0A= + USBDevice *device =3D usbredir_server_device(s);=0A= +=0A= + QTAILQ_REMOVE(&s->inflight, rp, next);=0A= + usb_packet_cleanup(&rp->pkt);=0A= +=0A= + if (!s->parser || !device) {=0A= + usbredir_server_pkt_free(rp);=0A= + return;=0A= + }=0A= +=0A= + switch (rp->type) {=0A= + case USBREDIR_SERVER_CTRL_SETUP:=0A= + usbredir_server_ctrl_setup_complete(s, rp);=0A= + break;=0A= + case USBREDIR_SERVER_CTRL_STATUS:=0A= + usbredir_server_ctrl_status_complete(s, rp);=0A= + break;=0A= + }=0A= +=0A= + usbredir_server_pkt_free(rp);=0A= +}=0A= +=0A= static USBPortOps usbredir_server_port_ops =3D {=0A= .attach =3D usbredir_server_port_attach,=0A= .detach =3D usbredir_server_port_detach,=0A= .child_detach =3D usbredir_server_port_child_detach,=0A= .wakeup =3D usbredir_server_port_wakeup,=0A= + .complete =3D usbredir_server_packet_complete,=0A= };=0A= =0A= /*=0A= @@ -197,6 +616,54 @@ static USBPortOps usbredir_server_port_ops =3D {=0A= static USBBusOps usbredir_server_bus_ops =3D {=0A= };=0A= =0A= +/*=0A= + * Submit a packet to the device. The core only calls our completion=0A= + * callback when the device answers USB_RET_ASYNC, so call it here for=0A= + * the rest.=0A= + */=0A= +static void usbredir_server_submit_to_device(USBRedirServer *s,=0A= + USBRedirServerPkt *rp)=0A= +{=0A= + QTAILQ_INSERT_TAIL(&s->inflight, rp, next);=0A= + usb_handle_packet(usbredir_server_device(s), &rp->pkt);=0A= + if (rp->pkt.status !=3D USB_RET_ASYNC) {=0A= + usbredir_server_packet_complete(&s->port, &rp->pkt);=0A= + }=0A= +}=0A= +=0A= +static USBRedirServerPkt *usbredir_server_pkt_alloc(int size)=0A= +{=0A= + USBRedirServerPkt *rp =3D g_new0(USBRedirServerPkt, 1);=0A= +=0A= + qemu_iovec_init(&rp->pkt.iov, 1);=0A= + rp->data =3D g_malloc0(size);=0A= + rp->data_size =3D size;=0A= + return rp;=0A= +}=0A= +=0A= +static void usbredir_server_pkt_free(USBRedirServerPkt *rp)=0A= +{=0A= + g_free(rp->data);=0A= + g_free(rp);=0A= +}=0A= +=0A= +/*=0A= + * Take @rp off the list and free it. Do not use usb_packet_complete():=0A= + * it calls back into usbredir_server_packet_complete(), which would=0A= + * remove the entry a second time and free it. usb_cancel_packet() only=0A= + * tells the device to let go.=0A= + */=0A= +static void usbredir_server_drop_pkt(USBRedirServer *s,=0A= + USBRedirServerPkt *rp)=0A= +{=0A= + QTAILQ_REMOVE(&s->inflight, rp, next);=0A= + if (usb_packet_is_inflight(&rp->pkt)) {=0A= + usb_cancel_packet(&rp->pkt);=0A= + }=0A= + usb_packet_cleanup(&rp->pkt);=0A= + usbredir_server_pkt_free(rp);=0A= +}=0A= +=0A= /*=0A= * usbredirparser I/O and logging callbacks=0A= */=0A= @@ -312,9 +779,199 @@ static void usbredir_server_reset(void *priv)=0A= USBDevice *device =3D usbredir_server_device(s);=0A= =0A= trace_usbredir_server_bus_reset(device && device->attached);=0A= + if (!device || !device->attached) {=0A= + return;=0A= + }=0A= +=0A= + usbredir_server_stop_transfers(s);=0A= usb_device_reset(device);=0A= }=0A= =0A= +/*=0A= + * Run one control transfer on the device. @reply says which message=0A= + * answers the host when the transfer finishes.=0A= + */=0A= +static void usbredir_server_do_control(USBRedirServer *s, uint64_t id,=0A= + struct usb_redir_control_packet_header *hdr,=0A= + uint8_t *data, int data_len, USBRedirServerReply reply)=0A= +{=0A= + USBDevice *device =3D usbredir_server_device(s);=0A= + USBRedirServerPkt *rp;=0A= + USBEndpoint *ep_out;=0A= + USBEndpoint *ep_in;=0A= + USBEndpoint *ep0;=0A= + bool is_in;=0A= + int size;=0A= +=0A= + if (!s->host_connected || !device || !device->attached) {=0A= + return;=0A= + }=0A= +=0A= + trace_usbredir_server_control(id, hdr->requesttype, hdr->request,=0A= + hdr->value, hdr->index, hdr->length);=0A= +=0A= + is_in =3D !!(hdr->requesttype & USB_DIR_IN);=0A= +=0A= + ep0 =3D usb_ep_get(device, USB_TOKEN_SETUP, 0);=0A= +=0A= + /* Room for the setup bytes and for the data of either direction. */= =0A= + size =3D MAX(hdr->length, data_len);=0A= + size =3D MAX(size, (int)sizeof(device->setup_buf));=0A= +=0A= + rp =3D usbredir_server_pkt_alloc(size);=0A= + rp->redir_id =3D id;=0A= + rp->reply =3D reply;=0A= + rp->ctrl_hdr =3D *hdr;=0A= +=0A= + /*=0A= + * Build the raw 8-byte SETUP packet in rp->data. The IN path=0A= + * overwrites it later with the answer from the device.=0A= + */=0A= + rp->data[0] =3D hdr->requesttype;=0A= + rp->data[1] =3D hdr->request;=0A= + rp->data[2] =3D hdr->value & 0xff;=0A= + rp->data[3] =3D (hdr->value >> 8) & 0xff;=0A= + rp->data[4] =3D hdr->index & 0xff;=0A= + rp->data[5] =3D (hdr->index >> 8) & 0xff;=0A= + rp->data[6] =3D hdr->length & 0xff;=0A= + rp->data[7] =3D (hdr->length >> 8) & 0xff;=0A= +=0A= + if (is_in) {=0A= + /*=0A= + * An IN request. The device starts the work on the setup token=0A= + * and may take its time, so send the token and pick the rest up= =0A= + * in usbredir_server_ctrl_setup_complete().=0A= + */=0A= + rp->type =3D USBREDIR_SERVER_CTRL_SETUP;=0A= + usb_packet_setup(&rp->pkt, USB_TOKEN_SETUP, ep0,=0A= + 0, s->next_id++, false, false);=0A= + usb_packet_addbuf(&rp->pkt, rp->data, sizeof(device->setup_buf));= =0A= + usbredir_server_submit_to_device(s, rp);=0A= + } else {=0A= + /*=0A= + * An OUT request. The device only stores the setup bytes now and= =0A= + * does the work on the status stage, so run the first two stages= =0A= + * here and wait on the last one.=0A= + */=0A= + ep_in =3D usb_ep_get(device, USB_TOKEN_IN, 0);=0A= + ep_out =3D usb_ep_get(device, USB_TOKEN_OUT, 0);=0A= +=0A= + /* Setup stage: hand the device the 8 setup bytes. */=0A= + usb_packet_setup(&rp->pkt, USB_TOKEN_SETUP, ep0,=0A= + 0, s->next_id++, false, false);=0A= + usb_packet_addbuf(&rp->pkt, rp->data, sizeof(device->setup_buf));= =0A= + usb_handle_packet(device, &rp->pkt);=0A= + usb_packet_cleanup(&rp->pkt);=0A= +=0A= + /* Data stage: send the bytes that came with the request. */=0A= + if (data_len > 0) {=0A= + memcpy(rp->data, data, data_len);=0A= + qemu_iovec_init(&rp->pkt.iov, 1);=0A= + usb_packet_setup(&rp->pkt, USB_TOKEN_OUT, ep_out,=0A= + 0, s->next_id++, false, false);=0A= + usb_packet_addbuf(&rp->pkt, rp->data, data_len);=0A= + /* The core copies our bytes into device->data_buf. */=0A= + usb_handle_packet(device, &rp->pkt);=0A= + usb_packet_cleanup(&rp->pkt);=0A= + }=0A= +=0A= + /* Status stage: the device does the work here, so wait for it. */= =0A= + rp->type =3D USBREDIR_SERVER_CTRL_STATUS;=0A= + qemu_iovec_init(&rp->pkt.iov, 1);=0A= + usb_packet_setup(&rp->pkt, USB_TOKEN_IN, ep_in,=0A= + 0, s->next_id++, false, false);=0A= + /* async; the answer comes in usbredir_server_ctrl_status_complete= () */=0A= + usbredir_server_submit_to_device(s, rp);=0A= + }=0A= +}=0A= +=0A= +static void usbredir_server_control_packet(void *priv, uint64_t id,=0A= + struct usb_redir_control_packet_header *hdr,=0A= + uint8_t *data, int data_len)=0A= +{=0A= + usbredir_server_do_control(priv, id, hdr, data, data_len,=0A= + USBREDIR_SERVER_REPLY_CONTROL);=0A= +}=0A= +=0A= +static void usbredir_server_set_configuration(void *priv, uint64_t id,=0A= + struct usb_redir_set_configuration_header *hdr)=0A= +{=0A= + struct usb_redir_control_packet_header ctrl =3D {=0A= + .endpoint =3D 0,=0A= + .request =3D USB_REQ_SET_CONFIGURATION,=0A= + /* Host->Device, Standard, Device */=0A= + .requesttype =3D 0x00,=0A= + .status =3D 0,=0A= + .value =3D hdr->configuration,=0A= + .index =3D 0,=0A= + .length =3D 0,=0A= + };=0A= + USBRedirServer *s =3D priv;=0A= +=0A= + /* The host gets a configuration_status when the device answers. */=0A= + usbredir_server_do_control(s, id, &ctrl, NULL, 0,=0A= + USBREDIR_SERVER_REPLY_CONFIG);=0A= +}=0A= +=0A= +static void usbredir_server_get_configuration(void *priv, uint64_t id)=0A= +{=0A= + struct usb_redir_control_packet_header ctrl =3D {=0A= + .endpoint =3D 0,=0A= + .request =3D USB_REQ_GET_CONFIGURATION,=0A= + /* Device->Host, Standard, Device */=0A= + .requesttype =3D 0x80,=0A= + .status =3D 0,=0A= + .value =3D 0,=0A= + .index =3D 0,=0A= + .length =3D 1,=0A= + };=0A= + USBRedirServer *s =3D priv;=0A= +=0A= + /* The host gets a configuration_status when the device answers. */=0A= + usbredir_server_do_control(s, id, &ctrl, NULL, 0,=0A= + USBREDIR_SERVER_REPLY_CONFIG);=0A= +}=0A= +=0A= +static void usbredir_server_set_alt_setting(void *priv, uint64_t id,=0A= + struct usb_redir_set_alt_setting_header *hdr)=0A= +{=0A= + struct usb_redir_control_packet_header ctrl =3D {=0A= + .endpoint =3D 0,=0A= + .request =3D USB_REQ_SET_INTERFACE,=0A= + /* Host->Device, Standard, Interface */=0A= + .requesttype =3D 0x01,=0A= + .status =3D 0,=0A= + .value =3D hdr->alt,=0A= + .index =3D hdr->interface,=0A= + .length =3D 0,=0A= + };=0A= + USBRedirServer *s =3D priv;=0A= +=0A= + /* The host gets an alt_setting_status when the device answers. */=0A= + usbredir_server_do_control(s, id, &ctrl, NULL, 0,=0A= + USBREDIR_SERVER_REPLY_ALT);=0A= +}=0A= +=0A= +static void usbredir_server_get_alt_setting(void *priv, uint64_t id,=0A= + struct usb_redir_get_alt_setting_header *hdr)=0A= +{=0A= + struct usb_redir_control_packet_header ctrl =3D {=0A= + .endpoint =3D 0,=0A= + .request =3D USB_REQ_GET_INTERFACE,=0A= + /* Device->Host, Standard, Interface */=0A= + .requesttype =3D 0x81,=0A= + .status =3D 0,=0A= + .value =3D 0,=0A= + .index =3D hdr->interface,=0A= + .length =3D 1,=0A= + };=0A= + USBRedirServer *s =3D priv;=0A= +=0A= + /* The host gets an alt_setting_status when the device answers. */=0A= + usbredir_server_do_control(s, id, &ctrl, NULL, 0,=0A= + USBREDIR_SERVER_REPLY_ALT);=0A= +}=0A= +=0A= static void usbredir_server_filter_reject(void *priv)=0A= {=0A= trace_usbredir_server_filter_reject();=0A= @@ -338,6 +995,84 @@ static void usbredir_server_interface_info(void *priv,= =0A= /* The host should not send this to a device. Nothing to do. */=0A= }=0A= =0A= +static void usbredir_server_cancel_data_packet(void *priv, uint64_t id)=0A= +{=0A= + struct usb_redir_control_packet_header resp =3D {=0A= + .endpoint =3D 0,=0A= + .status =3D usb_redir_cancelled,=0A= + .length =3D 0,=0A= + };=0A= + USBRedirServer *s =3D priv;=0A= + USBRedirServerPkt *rp;=0A= +=0A= + /*=0A= + * The host has put this id in its cancelled queue and waits for one= =0A= + * answer carrying it. The device may have answered already, so the=0A= + * request may no longer be on our list. Answer in both cases: the=0A= + * host reuses ids, and a leftover entry would eat a later answer.=0A= + */=0A= + QTAILQ_FOREACH(rp, &s->inflight, next) {=0A= + if (rp->redir_id =3D=3D id) {=0A= + trace_usbredir_server_cancel(id, true);=0A= + usbredir_server_send_cancelled(s, rp);=0A= + usbredir_server_drop_pkt(s, rp);=0A= + return;=0A= + }=0A= + }=0A= +=0A= + /*=0A= + * Already finished, so we no longer know what kind of transfer it=0A= + * was. The host retires the entry on the id alone, and its control=0A= + * handler ignores the endpoint field, so a control packet always=0A= + * works.=0A= + */=0A= + trace_usbredir_server_cancel(id, false);=0A= + usbredirparser_send_control_packet(s->parser, id, &resp, NULL, 0);=0A= + usbredirparser_do_write(s->parser);=0A= +}=0A= +=0A= +/*=0A= + * Cancelled and in-flight packets=0A= + */=0A= +=0A= +/*=0A= + * Every request must get one answer carrying its id, even an aborted one.= =0A= + * A dropped id stays in the host's cancelled queue. The host reuses ids,= =0A= + * so a later answer would be thrown away as a stale one.=0A= + */=0A= +static void usbredir_server_send_cancelled(USBRedirServer *s,=0A= + USBRedirServerPkt *rp)=0A= +{=0A= + struct usb_redir_control_packet_header ctrl;=0A= +=0A= + switch (rp->type) {=0A= + case USBREDIR_SERVER_CTRL_SETUP:=0A= + case USBREDIR_SERVER_CTRL_STATUS:=0A= + ctrl =3D rp->ctrl_hdr;=0A= + ctrl.status =3D usb_redir_cancelled;=0A= + ctrl.length =3D 0;=0A= + usbredirparser_send_control_packet(s->parser, rp->redir_id,=0A= + &ctrl, NULL, 0);=0A= + break;=0A= + default:=0A= + return;=0A= + }=0A= + usbredirparser_do_write(s->parser);=0A= +}=0A= +=0A= +static void usbredir_server_stop_transfers(USBRedirServer *s)=0A= +{=0A= + USBRedirServerPkt *rp;=0A= +=0A= + /*=0A= + * No "cancelled" response here. This runs on a bus reset, a detach or= =0A= + * a closed chardev, and the host has dropped its own queues already.= =0A= + */=0A= + while ((rp =3D QTAILQ_FIRST(&s->inflight)) !=3D NULL) {=0A= + usbredir_server_drop_pkt(s, rp);=0A= + }=0A= +}=0A= +=0A= /*=0A= * Parser setup and teardown=0A= */=0A= @@ -360,13 +1095,19 @@ static void usbredir_server_create_parser(USBRedirSe= rver *s)=0A= /* Callbacks for messages the remote host sends to us */=0A= s->parser->hello_func =3D usbredir_server_hello;=0A= s->parser->reset_func =3D usbredir_server_reset;=0A= + s->parser->control_packet_func =3D usbredir_server_control_packet;=0A= + s->parser->set_configuration_func =3D usbredir_server_set_configuratio= n;=0A= =0A= /* The parser calls these directly, so they must not be NULL. */=0A= + s->parser->get_configuration_func =3D usbredir_server_get_configuratio= n;=0A= + s->parser->set_alt_setting_func =3D usbredir_server_set_alt_setting;= =0A= + s->parser->get_alt_setting_func =3D usbredir_server_get_alt_setting;= =0A= s->parser->filter_reject_func =3D usbredir_server_filter_reject;=0A= s->parser->filter_filter_func =3D usbredir_server_filter_filter;=0A= s->parser->device_disconnect_ack_func =3D=0A= usbredir_server_device_disconnect_ack;=0A= s->parser->interface_info_func =3D usbredir_server_interface_info;=0A= + s->parser->cancel_data_packet_func =3D usbredir_server_cancel_data_pac= ket;=0A= =0A= /* Capabilities: 64-bit IDs, connect_device_version, ep_info sizes */= =0A= usbredirparser_caps_set_cap(caps, usb_redir_cap_connect_device_version= );=0A= @@ -398,6 +1139,8 @@ static void usbredir_server_destroy_parser(USBRedirSer= ver *s)=0A= =0A= g_clear_handle_id(&s->watch, g_source_remove);=0A= =0A= + usbredir_server_stop_transfers(s);=0A= +=0A= if (s->parser) {=0A= usbredirparser_destroy(s->parser);=0A= s->parser =3D NULL;=0A= @@ -486,6 +1229,11 @@ static void usbredir_server_realize(DeviceState *dev,= Error **errp)=0A= return;=0A= }=0A= =0A= + QTAILQ_INIT(&s->inflight);=0A= + s->config_descs =3D g_hash_table_new_full(g_direct_hash, g_direct_equa= l,=0A= + NULL, g_free);=0A= + memset(s->ep_type, USB_ENDPOINT_XFER_INVALID, sizeof(s->ep_type));=0A= +=0A= /* One port: usbredir carries a single device. */=0A= usb_bus_new(&s->bus, sizeof(s->bus), &usbredir_server_bus_ops, dev);= =0A= s->bus.no_auto_hub =3D true;=0A= @@ -510,6 +1258,8 @@ static void usbredir_server_unrealize(DeviceState *dev= )=0A= qemu_chr_fe_deinit(&s->cs, true);=0A= usbredir_server_destroy_parser(s);=0A= =0A= + g_clear_pointer(&s->config_descs, g_hash_table_destroy);=0A= +=0A= if (s->chardev_close_bh) {=0A= qemu_bh_delete(s->chardev_close_bh);=0A= s->chardev_close_bh =3D NULL;=0A= diff --git a/hw/usb/trace-events b/hw/usb/trace-events=0A= index 2cc6a244b9..0ed20838b2 100644=0A= --- a/hw/usb/trace-events=0A= +++ b/hw/usb/trace-events=0A= @@ -406,3 +406,12 @@ usbredir_server_announce(uint8_t speed) "device_connec= t speed %u"=0A= usbredir_server_disconnect(void) "device_disconnect sent"=0A= usbredir_server_bus_reset(bool attached) "bus reset, attached %d"=0A= usbredir_server_filter_reject(void) "host rejected our device"=0A= +usbredir_server_cancel(uint64_t id, bool found) "id %" PRIu64 " still in f= light %d"=0A= +usbredir_server_ep_info(unsigned idx, uint8_t type, uint16_t mps, uint8_t = interval, uint8_t iface) "ep_info[%u] type %u mps %u interval %u iface %u"= =0A= +usbredir_server_config_not_found(uint8_t value, unsigned have) "no descrip= tor for configuration %u, we have %u"=0A= +usbredir_server_bad_descriptor(int offset, uint8_t length, uint8_t type) "= descriptor at byte %d is too short: bLength %u, type %u"=0A= +usbredir_server_descriptor_overrun(int offset, uint8_t length, int total) = "descriptor at byte %d runs past the end: bLength %u, total %d"=0A= +usbredir_server_endpoint_dropped(uint8_t address) "endpoint 0x%02x does no= t fit our tables"=0A= +usbredir_server_control(uint64_t id, uint8_t requesttype, uint8_t request,= uint16_t value, uint16_t index, uint16_t length) "id %" PRIu64 " type 0x%0= 2x request 0x%02x value 0x%04x index 0x%04x length %u"=0A= +usbredir_server_ctrl_setup_complete(uint64_t id, int status, int actual) "= id %" PRIu64 " status %d actual %d"=0A= +usbredir_server_ctrl_status_complete(uint64_t id, int status) "id %" PRIu6= 4 " status %d"=0A= -- =0A= 2.43.0=0A=