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DM USB: introduce enum type usb_block_type

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In the process of USB data transfer, there three kinds of data blocks:
a. Non data block, which contains some control information;
b. Partial data block, which contains part of a large data chunk;
c. Full data block, which contains a complete data chunk.

In previous implementation, the differences mentioned above are described
by the usb_block::chained. But the 'chained' is concept in the xHCI area
and should not appear in the USB layer. This patch introduces enum type
usb_block_type to replace the 'chained' field in struct usb_block.

Tracked-On: #3628
Signed-off-by: Xiaoguang Wu <xiaoguang.wu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Xiaoguang Wu
2019-09-09 11:23:03 +08:00
committed by wenlingz
parent 7445e404a8
commit 236c23e418
4 changed files with 45 additions and 22 deletions
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8
devicemodel/include/usb_core.h
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@@ -142,6 +142,12 @@ struct usb_hci {
int hci_port;
};
enum usb_block_type {
USB_DATA_NONE,
USB_DATA_PART,
USB_DATA_FULL
};
/*
* Each xfer block is mapped to the hci transfer block.
* On input into the device handler, blen is set to the lenght of buf.
@@ -155,9 +161,9 @@ struct usb_block {
enum usb_block_stat stat; /* processed status */
void *hci_data; /* HCI private reference */
int ccs;
int chained;
uint32_t streamid;
uint64_t trbnext; /* next TRB guest address */
enum usb_block_type type;
};
struct usb_xfer {