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DM USB: xHCI: enable Flat Mode Hub emulation support.

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Flat Mode for hub emulation means DM emulates USB devices under hub but
hide hub itself. Under this design the Guest OS cannot see any emulated
hub. So in the perspective of Guest OS, all the emulated devices are
under root hub.

This patch is used to enable feature as mentioned above. And please NOTE,
it is the initial version of hub flat Mode hub emulation, there are one
limitation: only one physical hub is supported. If second physical hub is
connected, the connect and disconnect behavior in second hub may affect
the function of first emulated hub.

The USB HUB device model should be the final long term solution, but it is
very complex. Use flat mode HUB emulation as the short term solution first
to support some USB touch devices which integrated internal HUB.

Signed-off-by: Liang Yang <liang3.yang@intel.com>
Reviewed-by: Xiaoguang Wu <xiaoguang.wu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
Tracked-On: #1243
This commit is contained in:
Liang Yang
2018-08-20 11:17:35 +08:00
committed by lijinxia
parent d886375ee4
commit 612037e138
3 changed files with 139 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
devicemodel/hw/pci/xhci.c
View File

@@ -95,7 +95,7 @@
#undef LOG_TAG
#define LOG_TAG "xHCI: "
#define XHCI_MAX_DEVS 8 /* 4 USB3 + 4 USB2 devs */
#define XHCI_MAX_DEVS 20 /* 10 root hub + 10 external hub */
#define XHCI_MAX_SLOTS 64 /* min allowed by Windows drivers */
/*
@@ -394,6 +394,7 @@ struct pci_xhci_vdev {
#define VPORT_ASSIGNED (1)
#define VPORT_CONNECTED (2)
#define VPORT_EMULATED (3)
#define VPORT_HUB_CONNECTED (4)
/* helpers for get port mapping information */
#define VPORT_NUM(state) (state & 0xFF)
@@ -479,6 +480,27 @@ static struct pci_xhci_option_elem xhci_option_table[] = {
{"cap", pci_xhci_parse_extcap}
};
static enum usb_native_dev_type
pci_xhci_get_dev_type(struct pci_xhci_vdev *xdev, void *dev_data)
{
uint16_t port, bus;
struct usb_native_devinfo *di;
assert(dev_data);
di = dev_data;
if (usb_get_parent_dev_type(di->priv_data, &bus, &port) == USB_HUB) {
if (VPORT_STATE(xdev->port_map_tbl[bus][port]) ==
VPORT_HUB_CONNECTED) {
di->port += PORT_HUB_BASE;
return USB_VALID_SUB_DEV;
} else
return USB_INVALID_SUB_DEV;
}
return USB_DEV;
}
static int
pci_xhci_native_usb_dev_conn_cb(void *hci_data, void *dev_data)
{
@@ -487,6 +509,9 @@ pci_xhci_native_usb_dev_conn_cb(void *hci_data, void *dev_data)
int vport_start, vport_end;
int port;
int need_intr = 1;
enum usb_native_dev_type type;
int state;
int rc;
xdev = hci_data;
@@ -501,12 +526,37 @@ pci_xhci_native_usb_dev_conn_cb(void *hci_data, void *dev_data)
UPRINTF(LDBG, "%04x:%04x %d-%d connecting.\r\n",
di->vid, di->pid, di->bus, di->port);
if (VPORT_STATE(xdev->port_map_tbl[di->bus][di->port]) ==
VPORT_FREE) {
UPRINTF(LDBG, "%04x:%04x %d-%d doesn't belong to this vm, bye."
"\r\n", di->vid, di->pid, di->bus, di->port);
type = pci_xhci_get_dev_type(xdev, di);
if (type == USB_DEV) {
if (VPORT_STATE(xdev->port_map_tbl[di->bus][di->port]) ==
VPORT_FREE) {
UPRINTF(LDBG, "%04x:%04x %d-%d doesn't belong to this"
" vm, bye.\r\n", di->vid, di->pid,
di->bus, di->port);
goto errout;
}
} else if (type == USB_INVALID_SUB_DEV)
return 0;
state = VPORT_STATE(xdev->port_map_tbl[di->bus][di->port]);
if (state == VPORT_CONNECTED || state == VPORT_EMULATED ||
state == VPORT_HUB_CONNECTED) {
UPRINTF(LFTL, "do not support multiple hubs currently, reject "
"device %d-%d\r\n", di->bus, di->port);
goto errout;
}
rc = usb_dev_is_hub(di->priv_data);
if (rc == USB_HUB) {
xdev->port_map_tbl[di->bus][di->port] =
VPORT_NUM_STATE(VPORT_HUB_CONNECTED, 0);
return 0;
} else if (rc == USB_TYPE_INVALID) {
UPRINTF(LWRN, "usb_dev_is_hub failed\r\n");
goto errout;
}
UPRINTF(LDBG, "%04x:%04x %d-%d belong to this vm.\r\n", di->vid,
di->pid, di->bus, di->port);
@@ -593,8 +643,6 @@ pci_xhci_native_usb_dev_disconn_cb(void *hci_data, void *dev_data)
if (xdev->slots[slot] == edev)
break;
assert(slot < XHCI_MAX_SLOTS);
status = VPORT_STATE(xdev->port_map_tbl[di.bus][di.port]);
assert(status == VPORT_EMULATED || status == VPORT_CONNECTED);
xdev->port_map_tbl[di.bus][di.port] = VPORT_NUM_STATE(VPORT_ASSIGNED,