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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
Download Patch File Download Diff File Expand all files Collapse all files

38
devicemodel/hw/pci/xhci.c
View File

@@ -2650,12 +2650,11 @@ pci_xhci_xfer_complete(struct pci_xhci_vdev *xdev, struct usb_xfer *xfer,
trbflags = trb->dwTrb3;
UPRINTF(LDBG, "xfer[%d] done?%u:%d trb %x %016lx %x "
"(err %d) IOC?%d, chained %d\r\n",
"(err %d) IOC?%d, type %d\r\n",
i, xfer->data[i].stat, xfer->data[i].blen,
XHCI_TRB_3_TYPE_GET(trbflags), evtrb.qwTrb0,
trbflags, err,
trb->dwTrb3 & XHCI_TRB_3_IOC_BIT ? 1 : 0,
xfer->data[i].chained);
XHCI_TRB_3_TYPE_GET(trbflags), evtrb.qwTrb0, trbflags,
err, trb->dwTrb3 & XHCI_TRB_3_IOC_BIT ? 1 : 0,
xfer->data[i].type);
if (xfer->data[i].stat < USB_BLOCK_HANDLED) {
xfer->head = (int)i;
@@ -2668,14 +2667,14 @@ pci_xhci_xfer_complete(struct pci_xhci_vdev *xdev, struct usb_xfer *xfer,
edtla += xfer->data[i].bdone;
trb->dwTrb3 = (trb->dwTrb3 & ~0x1) | (xfer->data[i].ccs);
if (xfer->data[i].chained == 1) {
if (xfer->data[i].type == USB_DATA_PART) {
rem_len += xfer->data[i].blen;
i = (i + 1) % USB_MAX_XFER_BLOCKS;
/* When the chained == 1, this 'continue' will delay
* the IOC behavior which could decrease the number
* of virtual interrupts. This could GREATLY improve
* the performance especially under ISOCH scenario.
/* This 'continue' will delay the IOC behavior which
* could decrease the number of virtual interrupts.
* This could GREATLY improve the performance especially
* under ISOCH scenario.
*/
continue;
} else
@@ -2818,6 +2817,7 @@ pci_xhci_handle_transfer(struct pci_xhci_vdev *xdev,
struct xhci_trb *setup_trb;
struct usb_xfer *xfer;
struct usb_block *xfer_block;
struct usb_block *prev_block;
uint64_t val;
uint32_t trbflags;
int do_intr, err;
@@ -2837,6 +2837,7 @@ retry:
do_retry = 0;
do_intr = 0;
setup_trb = NULL;
prev_block = NULL;
while (1) {
pci_xhci_dump_trb(trb);
@@ -2920,8 +2921,17 @@ retry:
trb->dwTrb2 & 0x1FFFF, (void *)addr,
ccs);
if (xfer_block && (trb->dwTrb3 & XHCI_TRB_3_CHAIN_BIT))
xfer_block->chained = 1;
if (!xfer_block) {
err = XHCI_TRB_ERROR_STALL;
goto errout;
}
if (trb->dwTrb3 & XHCI_TRB_3_CHAIN_BIT)
xfer_block->type = USB_DATA_PART;
else
xfer_block->type = USB_DATA_FULL;
prev_block = xfer_block;
break;
case XHCI_TRB_TYPE_STATUS_STAGE:
@@ -2948,6 +2958,10 @@ retry:
}
if ((epid > 1) && (trbflags & XHCI_TRB_3_IOC_BIT))
xfer_block->stat = USB_BLOCK_HANDLED;
if (prev_block && prev_block->type == USB_DATA_PART)
prev_block->type = USB_DATA_FULL;
break;
default: