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A device of USB video class usually uses larger desc structure, so use larger buffer to avoid failure. (dev-video.c is ready) This is an unlikely code path: 1, during guest startup, guest tries to probe device. 2, run 'lsusb' command in guest(or other similar commands). Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com> Message-Id: <20220112015835.900619-1-pizhenwei@bytedance.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
246 lines
8.4 KiB
C
246 lines
8.4 KiB
C
#ifndef QEMU_HW_USB_DESC_H
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#define QEMU_HW_USB_DESC_H
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#include <wchar.h>
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/* binary representation */
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typedef struct USBDescriptor {
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uint8_t bLength;
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uint8_t bDescriptorType;
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union {
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struct {
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uint8_t bcdUSB_lo;
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uint8_t bcdUSB_hi;
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uint8_t bDeviceClass;
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uint8_t bDeviceSubClass;
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uint8_t bDeviceProtocol;
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uint8_t bMaxPacketSize0;
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uint8_t idVendor_lo;
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uint8_t idVendor_hi;
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uint8_t idProduct_lo;
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uint8_t idProduct_hi;
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uint8_t bcdDevice_lo;
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uint8_t bcdDevice_hi;
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uint8_t iManufacturer;
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uint8_t iProduct;
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uint8_t iSerialNumber;
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uint8_t bNumConfigurations;
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} device;
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struct {
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uint8_t bcdUSB_lo;
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uint8_t bcdUSB_hi;
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uint8_t bDeviceClass;
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uint8_t bDeviceSubClass;
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uint8_t bDeviceProtocol;
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uint8_t bMaxPacketSize0;
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uint8_t bNumConfigurations;
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uint8_t bReserved;
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} device_qualifier;
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struct {
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uint8_t wTotalLength_lo;
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uint8_t wTotalLength_hi;
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uint8_t bNumInterfaces;
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uint8_t bConfigurationValue;
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uint8_t iConfiguration;
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uint8_t bmAttributes;
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uint8_t bMaxPower;
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} config;
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struct {
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uint8_t bInterfaceNumber;
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uint8_t bAlternateSetting;
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uint8_t bNumEndpoints;
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uint8_t bInterfaceClass;
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uint8_t bInterfaceSubClass;
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uint8_t bInterfaceProtocol;
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uint8_t iInterface;
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} interface;
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struct {
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uint8_t bEndpointAddress;
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uint8_t bmAttributes;
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uint8_t wMaxPacketSize_lo;
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uint8_t wMaxPacketSize_hi;
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uint8_t bInterval;
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uint8_t bRefresh; /* only audio ep */
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uint8_t bSynchAddress; /* only audio ep */
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} endpoint;
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struct {
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uint8_t bMaxBurst;
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uint8_t bmAttributes;
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uint8_t wBytesPerInterval_lo;
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uint8_t wBytesPerInterval_hi;
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} super_endpoint;
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struct {
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uint8_t wTotalLength_lo;
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uint8_t wTotalLength_hi;
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uint8_t bNumDeviceCaps;
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} bos;
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struct {
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uint8_t bDevCapabilityType;
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union {
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struct {
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uint8_t bmAttributes_1;
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uint8_t bmAttributes_2;
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uint8_t bmAttributes_3;
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uint8_t bmAttributes_4;
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} usb2_ext;
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struct {
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uint8_t bmAttributes;
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uint8_t wSpeedsSupported_lo;
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uint8_t wSpeedsSupported_hi;
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uint8_t bFunctionalitySupport;
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uint8_t bU1DevExitLat;
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uint8_t wU2DevExitLat_lo;
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uint8_t wU2DevExitLat_hi;
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} super;
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} u;
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} cap;
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} u;
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} QEMU_PACKED USBDescriptor;
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struct USBDescID {
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uint16_t idVendor;
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uint16_t idProduct;
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uint16_t bcdDevice;
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uint8_t iManufacturer;
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uint8_t iProduct;
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uint8_t iSerialNumber;
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};
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struct USBDescDevice {
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uint16_t bcdUSB;
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uint8_t bDeviceClass;
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uint8_t bDeviceSubClass;
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uint8_t bDeviceProtocol;
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uint8_t bMaxPacketSize0;
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uint8_t bNumConfigurations;
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const USBDescConfig *confs;
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};
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struct USBDescConfig {
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uint8_t bNumInterfaces;
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uint8_t bConfigurationValue;
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uint8_t iConfiguration;
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uint8_t bmAttributes;
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uint8_t bMaxPower;
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/* grouped interfaces */
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uint8_t nif_groups;
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const USBDescIfaceAssoc *if_groups;
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/* "normal" interfaces */
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uint8_t nif;
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const USBDescIface *ifs;
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};
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/* conceptually an Interface Association Descriptor, and related interfaces */
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struct USBDescIfaceAssoc {
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uint8_t bFirstInterface;
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uint8_t bInterfaceCount;
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uint8_t bFunctionClass;
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uint8_t bFunctionSubClass;
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uint8_t bFunctionProtocol;
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uint8_t iFunction;
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uint8_t nif;
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const USBDescIface *ifs;
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};
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struct USBDescIface {
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uint8_t bInterfaceNumber;
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uint8_t bAlternateSetting;
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uint8_t bNumEndpoints;
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uint8_t bInterfaceClass;
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uint8_t bInterfaceSubClass;
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uint8_t bInterfaceProtocol;
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uint8_t iInterface;
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uint8_t ndesc;
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USBDescOther *descs;
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USBDescEndpoint *eps;
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};
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struct USBDescEndpoint {
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uint8_t bEndpointAddress;
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uint8_t bmAttributes;
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uint16_t wMaxPacketSize;
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uint8_t bInterval;
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uint8_t bRefresh;
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uint8_t bSynchAddress;
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uint8_t is_audio; /* has bRefresh + bSynchAddress */
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uint8_t *extra;
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/* superspeed endpoint companion */
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uint8_t bMaxBurst;
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uint8_t bmAttributes_super;
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uint16_t wBytesPerInterval;
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};
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struct USBDescOther {
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uint8_t length;
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const uint8_t *data;
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};
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struct USBDescMSOS {
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const char *CompatibleID;
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const wchar_t *Label;
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bool SelectiveSuspendEnabled;
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};
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typedef const char *USBDescStrings[256];
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struct USBDesc {
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USBDescID id;
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const USBDescDevice *full;
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const USBDescDevice *high;
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const USBDescDevice *super;
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const char* const *str;
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const USBDescMSOS *msos;
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};
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#define USB_DESC_MAX_LEN 8192
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#define USB_DESC_FLAG_SUPER (1 << 1)
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/* little helpers */
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static inline uint8_t usb_lo(uint16_t val)
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{
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return val & 0xff;
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}
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static inline uint8_t usb_hi(uint16_t val)
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{
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return (val >> 8) & 0xff;
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}
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/* generate usb packages from structs */
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int usb_desc_device(const USBDescID *id, const USBDescDevice *dev,
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bool msos, uint8_t *dest, size_t len);
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int usb_desc_device_qualifier(const USBDescDevice *dev,
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uint8_t *dest, size_t len);
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int usb_desc_config(const USBDescConfig *conf, int flags,
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uint8_t *dest, size_t len);
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int usb_desc_iface_group(const USBDescIfaceAssoc *iad, int flags,
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uint8_t *dest, size_t len);
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int usb_desc_iface(const USBDescIface *iface, int flags,
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uint8_t *dest, size_t len);
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int usb_desc_endpoint(const USBDescEndpoint *ep, int flags,
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uint8_t *dest, size_t len);
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int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len);
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int usb_desc_msos(const USBDesc *desc, USBPacket *p,
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int index, uint8_t *dest, size_t len);
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/* control message emulation helpers */
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void usb_desc_init(USBDevice *dev);
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void usb_desc_attach(USBDevice *dev);
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void usb_desc_set_string(USBDevice *dev, uint8_t index, const char *str);
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void usb_desc_create_serial(USBDevice *dev);
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const char *usb_desc_get_string(USBDevice *dev, uint8_t index);
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int usb_desc_string(USBDevice *dev, int index, uint8_t *dest, size_t len);
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int usb_desc_get_descriptor(USBDevice *dev, USBPacket *p,
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int value, uint8_t *dest, size_t len);
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int usb_desc_handle_control(USBDevice *dev, USBPacket *p,
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int request, int value, int index, int length, uint8_t *data);
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#endif /* QEMU_HW_USB_DESC_H */
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