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author | Brooks Davis <brooks@FreeBSD.org> | 2021-12-17 21:28:14 +0000 |
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committer | Brooks Davis <brooks@FreeBSD.org> | 2021-12-17 21:28:14 +0000 |
commit | 0ec590d24e415dd36e38648630a0b963412ad87e (patch) | |
tree | a7dde475b61604cd39a5766f1f764565a02f3f5d /COPYRIGHT | |
parent | 45b48cbc2b5819cd6e3dee3632d66e55d5d7c101 (diff) | |
download | src-0ec590d24e415dd36e38648630a0b963412ad87e.tar.gz src-0ec590d24e415dd36e38648630a0b963412ad87e.zip |
usb: add 32-bit compat for FIFOs
Unlike most 32-bit compatability code, this isn't just a simple thunk
in the ioctl code. An ioctl (USB_FS_INIT) is used to install a
pointer to an array of usb_fs_endpoint structs which are then used
by the ugen fifo code. These struct contains an array of pointers
which requires translation. We change the interfaces around
struct usb_fs_endpoint as follows:
- We store the size of struct usb_fs_endpoint in struct usb_fifo
in the USB_FS_INIT handler so we know the ABI of the userspace
array.
- APIs to manipulate userspace struct usb_fs_endpoint objects now
take a struct usb_fifo and an index rather than a pointer to
the object. This allows most code to remain oblivious to the
different struct usb_fs_endpoint sizes.
- Add ugen_fs_copyin() which copies the struct usb_fs_endpoint
from userspace, thunking it to the native size if required.
- Uses of struct usb_fs_endpoint's ppBuffer member are now
via ugen_fs_getbuffer() which produces a native pointer.
- Updates to userspace are now handled by ugen_fs_update().
For clarity, single, fixed-sized members now are accessed with
fueword/suword rather than copyin/copyout.
Reviewed by: hselasky, jrtc27 (prior version)
Diffstat (limited to 'COPYRIGHT')
0 files changed, 0 insertions, 0 deletions