"waited %u microseconds.\n",
XHCI_MAX_HALT_USEC);
if (!ret)
- xhci->xhc_state &= ~XHCI_STATE_HALTED;
+ xhci->xhc_state &= ~(XHCI_STATE_HALTED | XHCI_STATE_DYING);
+
return ret;
}
command |= CMD_RESET;
writel(command, &xhci->op_regs->command);
+ /* Existing Intel xHCI controllers require a delay of 1 mS,
+ * after setting the CMD_RESET bit, and before accessing any
+ * HC registers. This allows the HC to complete the
+ * reset operation and be ready for HC register access.
+ * Without this delay, the subsequent HC register access,
+ * may result in a system hang very rarely.
+ */
+ if (xhci->quirks & XHCI_INTEL_HOST)
+ udelay(1000);
+
ret = xhci_handshake(&xhci->op_regs->command,
CMD_RESET, 0, 10 * 1000 * 1000);
if (ret)
}
EXPORT_SYMBOL_GPL(xhci_run);
-static void xhci_only_stop_hcd(struct usb_hcd *hcd)
-{
- struct xhci_hcd *xhci = hcd_to_xhci(hcd);
-
- spin_lock_irq(&xhci->lock);
- xhci_halt(xhci);
-
- /* The shared_hcd is going to be deallocated shortly (the USB core only
- * calls this function when allocation fails in usb_add_hcd(), or
- * usb_remove_hcd() is called). So we need to unset xHCI's pointer.
- */
- xhci->shared_hcd = NULL;
- spin_unlock_irq(&xhci->lock);
-}
-
/*
* Stop xHCI driver.
*
u32 temp;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- if (!usb_hcd_is_primary_hcd(hcd)) {
- xhci_only_stop_hcd(xhci->shared_hcd);
+ if (xhci->xhc_state & XHCI_STATE_HALTED)
return;
- }
+ mutex_lock(&xhci->mutex);
spin_lock_irq(&xhci->lock);
+ xhci->xhc_state |= XHCI_STATE_HALTED;
+ xhci->cmd_ring_state = CMD_RING_STATE_STOPPED;
+
/* Make sure the xHC is halted for a USB3 roothub
* (xhci_stop() could be called as part of failed init).
*/
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"xhci_stop completed - status = %x",
readl(&xhci->op_regs->status));
+ mutex_unlock(&xhci->mutex);
}
/*
struct usb_hcd *hcd = xhci_to_hcd(xhci);
u32 command;
+ if (!hcd->state)
+ return 0;
+
if (hcd->state != HC_STATE_SUSPENDED ||
xhci->shared_hcd->state != HC_STATE_SUSPENDED)
return -EINVAL;
int retval = 0;
bool comp_timer_running = false;
+ if (!hcd->state)
+ return 0;
+
/* Wait a bit if either of the roothubs need to settle from the
* transition into bus suspend.
*/
if (usb_endpoint_xfer_isoc(&urb->ep->desc))
size = urb->number_of_packets;
+ else if (usb_endpoint_is_bulk_out(&urb->ep->desc) &&
+ urb->transfer_buffer_length > 0 &&
+ urb->transfer_flags & URB_ZERO_PACKET &&
+ !(urb->transfer_buffer_length % usb_endpoint_maxp(&urb->ep->desc)))
+ size = 2;
else
size = 1;
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"HW died, freeing TD.");
urb_priv = urb->hcpriv;
- for (i = urb_priv->td_cnt; i < urb_priv->length; i++) {
+ for (i = urb_priv->td_cnt;
+ i < urb_priv->length && xhci->devs[urb->dev->slot_id];
+ i++) {
td = urb_priv->td[i];
if (!list_empty(&td->td_list))
list_del_init(&td->td_list);
}
/*
- * The USB device drivers use this function (though the HCD interface in USB
+ * The USB device drivers use this function (through the HCD interface in USB
* core) to prepare a set of bulk endpoints to use streams. Streams are used to
* coordinate mass storage command queueing across multiple endpoints (basically
* a stream ID == a task ID).
/*
* Issue an Address Device command and optionally send a corresponding
* SetAddress request to the device.
- * We should be protected by the usb_address0_mutex in hub_wq's hub_port_init,
- * so we should only issue and wait on one address command at the same time.
*/
static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev,
enum xhci_setup_dev setup)
mutex_lock(&xhci->mutex);
+ if (xhci->xhc_state) /* dying or halted */
+ goto out;
+
if (!udev->slot_id) {
xhci_dbg_trace(xhci, trace_xhci_dbg_address,
"Bad Slot ID %d", udev->slot_id);
__le32 __iomem *addr;
int raw_port;
- if (hcd->speed != HCD_USB3)
+ if (hcd->speed < HCD_USB3)
addr = xhci->usb2_ports[port1 - 1];
else
addr = xhci->usb3_ports[port1 - 1];
int hird, exit_latency;
int ret;
- if (hcd->speed == HCD_USB3 || !xhci->hw_lpm_support ||
+ if (hcd->speed >= HCD_USB3 || !xhci->hw_lpm_support ||
!udev->lpm_capable)
return -EPERM;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int portnum = udev->portnum - 1;
- if (hcd->speed == HCD_USB3 || !xhci->sw_lpm_support ||
+ if (hcd->speed >= HCD_USB3 || !xhci->sw_lpm_support ||
!udev->lpm_capable)
return 0;
{
struct xhci_hcd *xhci;
u16 mel;
- int ret;
xhci = hcd_to_xhci(hcd);
if (!xhci || !(xhci->quirks & XHCI_LPM_SUPPORT) ||
return 0;
mel = calculate_max_exit_latency(udev, state, USB3_LPM_DISABLED);
- ret = xhci_change_max_exit_latency(xhci, udev, mel);
- if (ret)
- return ret;
- return 0;
+ return xhci_change_max_exit_latency(xhci, udev, mel);
}
#else /* CONFIG_PM */
ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG);
slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx);
slot_ctx->dev_info |= cpu_to_le32(DEV_HUB);
+ /*
+ * refer to section 6.2.2: MTT should be 0 for full speed hub,
+ * but it may be already set to 1 when setup an xHCI virtual
+ * device, so clear it anyway.
+ */
if (tt->multi)
slot_ctx->dev_info |= cpu_to_le32(DEV_MTT);
+ else if (hdev->speed == USB_SPEED_FULL)
+ slot_ctx->dev_info &= cpu_to_le32(~DEV_MTT);
+
if (xhci->hci_version > 0x95) {
xhci_dbg(xhci, "xHCI version %x needs hub "
"TT think time and number of ports\n",
/* XHCI controllers don't stop the ep queue on short packets :| */
hcd->self.no_stop_on_short = 1;
+ xhci = hcd_to_xhci(hcd);
+
if (usb_hcd_is_primary_hcd(hcd)) {
- xhci = kzalloc(sizeof(struct xhci_hcd), GFP_KERNEL);
- if (!xhci)
- return -ENOMEM;
- *((struct xhci_hcd **) hcd->hcd_priv) = xhci;
xhci->main_hcd = hcd;
/* Mark the first roothub as being USB 2.0.
* The xHCI driver will register the USB 3.0 roothub.
*/
hcd->has_tt = 1;
} else {
+ if (xhci->sbrn == 0x31) {
+ xhci_info(xhci, "Host supports USB 3.1 Enhanced SuperSpeed\n");
+ hcd->speed = HCD_USB31;
+ }
/* xHCI private pointer was set in xhci_pci_probe for the second
* registered roothub.
*/
xhci->hcc_params = readl(&xhci->cap_regs->hc_capbase);
xhci->hci_version = HC_VERSION(xhci->hcc_params);
xhci->hcc_params = readl(&xhci->cap_regs->hcc_params);
+ if (xhci->hci_version > 0x100)
+ xhci->hcc_params2 = readl(&xhci->cap_regs->hcc_params2);
xhci_print_registers(xhci);
xhci->quirks = quirks;
/* Make sure the HC is halted. */
retval = xhci_halt(xhci);
if (retval)
- goto error;
+ return retval;
xhci_dbg(xhci, "Resetting HCD\n");
/* Reset the internal HC memory state and registers. */
retval = xhci_reset(xhci);
if (retval)
- goto error;
+ return retval;
xhci_dbg(xhci, "Reset complete\n");
/* Set dma_mask and coherent_dma_mask to 64-bits,
!dma_set_mask(dev, DMA_BIT_MASK(64))) {
xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n");
dma_set_coherent_mask(dev, DMA_BIT_MASK(64));
+ } else {
+ /*
+ * This is to avoid error in cases where a 32-bit USB
+ * controller is used on a 64-bit capable system.
+ */
+ retval = dma_set_mask(dev, DMA_BIT_MASK(32));
+ if (retval)
+ return retval;
+ xhci_dbg(xhci, "Enabling 32-bit DMA addresses.\n");
+ dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
}
xhci_dbg(xhci, "Calling HCD init\n");
/* Initialize HCD and host controller data structures. */
retval = xhci_init(hcd);
if (retval)
- goto error;
+ return retval;
xhci_dbg(xhci, "Called HCD init\n");
xhci_info(xhci, "hcc params 0x%08x hci version 0x%x quirks 0x%08x\n",
xhci->hcc_params, xhci->hci_version, xhci->quirks);
return 0;
-error:
- kfree(xhci);
- return retval;
}
EXPORT_SYMBOL_GPL(xhci_gen_setup);
.find_raw_port_number = xhci_find_raw_port_number,
};
-void xhci_init_driver(struct hc_driver *drv, int (*setup_fn)(struct usb_hcd *))
+void xhci_init_driver(struct hc_driver *drv,
+ const struct xhci_driver_overrides *over)
{
- BUG_ON(!setup_fn);
+ BUG_ON(!over);
+
+ /* Copy the generic table to drv then apply the overrides */
*drv = xhci_hc_driver;
- drv->reset = setup_fn;
+
+ if (over) {
+ drv->hcd_priv_size += over->extra_priv_size;
+ if (over->reset)
+ drv->reset = over->reset;
+ if (over->start)
+ drv->start = over->start;
+ }
}
EXPORT_SYMBOL_GPL(xhci_init_driver);
BUILD_BUG_ON(sizeof(struct xhci_stream_ctx) != 4*32/8);
BUILD_BUG_ON(sizeof(union xhci_trb) != 4*32/8);
BUILD_BUG_ON(sizeof(struct xhci_erst_entry) != 4*32/8);
- BUILD_BUG_ON(sizeof(struct xhci_cap_regs) != 7*32/8);
+ BUILD_BUG_ON(sizeof(struct xhci_cap_regs) != 8*32/8);
BUILD_BUG_ON(sizeof(struct xhci_intr_reg) != 8*32/8);
/* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */
BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8);
+
+ if (usb_disabled())
+ return -ENODEV;
+
return 0;
}
Code Review / kvmfornfv.git / blobdiff