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432ef71ed7
What a controller is told about a device before it will accept it. A DWC3 core validates these where QEMU's controller does not. - HCCPARAMS1 says whether context structures are 32 or 64 bytes, and the wider form was refused outright with -EIO; the EIC7700X reports 0x0220fe45 on both of its controllers, so this driver could not have driven either. A wide context is the same fields with reserved space after them, so only the stride changes. Read it at start up and use it wherever a context array is walked. - Contexts must be 64 byte aligned, since every device context base address array entry points at one, and the output context came from kmm_zalloc(). - The slot context never carried the device speed, which has no valid zero, so a validating controller answers Address Device with a parameter error. The speed was already implied by the endpoint context's maximum packet size. The numbering is xHCI's own, hence the mapping. - The output device context was cleared and never flushed. That context is the controller's to write, so what stays behind is a dirty line of zeros written back over the slot state, and the next command against the slot is refused with a context state error. Enumeration reached SET_ADDRESS and stopped. - A buffer copied through an aligned stand-in was copied back using buflen, which control transfers deliberately leave zero, so a descriptor read copied nothing back and the caller was handed whatever its buffer held before. Keep the requested length separately, and maintain the cache over the whole stand-in rather than the part in use. - A buffer the controller cannot reach is now copied through a stand-in rather than refused. -EFAULT works for a caller with somewhere better to put the data, and fails outright for one without: reading a block device directly from a user program returned an error where the transfer could have gone through a stand-in. Assisted-by: Claude:claude-opus-5 Signed-off-by: Justin Hammond <justin@dynam.ac> |
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| .. | ||
| CMakeLists.txt | ||
| hid_parser.c | ||
| Kconfig | ||
| Make.defs | ||
| usbhost_bthci.c | ||
| usbhost_cdcacm.c | ||
| usbhost_cdcecm.c | ||
| usbhost_cdcmbim.c | ||
| usbhost_composite.c | ||
| usbhost_composite.h | ||
| usbhost_devaddr.c | ||
| usbhost_drivers.c | ||
| usbhost_enumerate.c | ||
| usbhost_findclass.c | ||
| usbhost_ft232r.c | ||
| usbhost_hidkbd.c | ||
| usbhost_hidmouse.c | ||
| usbhost_hub.c | ||
| usbhost_max3421e.c | ||
| usbhost_registerclass.c | ||
| usbhost_registry.c | ||
| usbhost_registry.h | ||
| usbhost_skeleton.c | ||
| usbhost_storage.c | ||
| usbhost_trace.c | ||
| usbhost_waiter.c | ||
| usbhost_xboxcontroller.c | ||
| usbhost_xhci.c | ||
| usbhost_xhci.h | ||
| usbhost_xhci_pci.c | ||
| usbhost_xhci_trace.c | ||
| usbhost_xhci_trace.h | ||