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Increase the maximum user-space buffer size from 256kBytes to 32MBytes for

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libusb. This is useful for speeding up large data transfers while reducing
the interrupt rate.

Found at:	EuroBSDcon 2019
MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2019-09-20 11:00:02 +00:00
parent 4e792e431a
commit 4631d7f717
1 changed files with 1 additions and 1 deletions
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2
sys/dev/usb/usb_ioctl.h
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@ -224,7 +224,7 @@ struct usb_fs_uninit {
} USB_IOCTL_STRUCT_ALIGN(1);
struct usb_fs_open {
#define USB_FS_MAX_BUFSIZE (1 << 18)
#define USB_FS_MAX_BUFSIZE (1 << 25) /* 32 MBytes */
uint32_t max_bufsize;
#define USB_FS_MAX_FRAMES (1U << 12)
#define USB_FS_MAX_FRAMES_PRE_SCALE (1U << 31) /* for ISOCHRONOUS transfers */