Commit 22ad1e7f authored by Sarah Sharp's avatar Sarah Sharp Committed by Greg Kroah-Hartman

USB: Add parsing of SuperSpeed endpoint companion descriptor.

Allow the xHCI drivers (and any new USB 3.0 drivers) to parse the
SuperSpeed endpoint companion descriptor to find the maximum number of
bulk endpoint streams the endpoint supports.  This is used to calculate
the maximum total number of streams the driver can allocate.
Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent e07896e6
...@@ -556,6 +556,8 @@ struct usb_ss_ep_comp_descriptor { ...@@ -556,6 +556,8 @@ struct usb_ss_ep_comp_descriptor {
} __attribute__ ((packed)); } __attribute__ ((packed));
#define USB_DT_SS_EP_COMP_SIZE 6 #define USB_DT_SS_EP_COMP_SIZE 6
/* Bits 4:0 of bmAttributes if this is a bulk endpoint */
#define USB_SS_MAX_STREAMS(p) (1 << (p & 0x1f))
/*-------------------------------------------------------------------------*/ /*-------------------------------------------------------------------------*/
......
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