*/
int xhci_halt(struct xhci_hcd *xhci)
{
+ int ret;
xhci_dbg(xhci, "// Halt the HC\n");
xhci_quiesce(xhci);
- return handshake(xhci, &xhci->op_regs->status,
+ ret = handshake(xhci, &xhci->op_regs->status,
STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC);
+ if (!ret)
+ xhci->xhc_state |= XHCI_STATE_HALTED;
+ return ret;
}
/*
* Set the run bit and wait for the host to be running.
*/
-int xhci_start(struct xhci_hcd *xhci)
+static int xhci_start(struct xhci_hcd *xhci)
{
u32 temp;
int ret;
xhci_err(xhci, "Host took too long to start, "
"waited %u microseconds.\n",
XHCI_MAX_HALT_USEC);
+ if (!ret)
+ xhci->xhc_state &= ~XHCI_STATE_HALTED;
return ret;
}
return handshake(xhci, &xhci->op_regs->status, STS_CNR, 0, 250 * 1000);
}
-/*
- * Free IRQs
- * free all IRQs request
- */
-static void xhci_free_irq(struct xhci_hcd *xhci)
+#ifdef CONFIG_PCI
+static int xhci_free_msi(struct xhci_hcd *xhci)
{
int i;
- struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
-
- /* return if using legacy interrupt */
- if (xhci_to_hcd(xhci)->irq >= 0)
- return;
- if (xhci->msix_entries) {
- for (i = 0; i < xhci->msix_count; i++)
- if (xhci->msix_entries[i].vector)
- free_irq(xhci->msix_entries[i].vector,
- xhci_to_hcd(xhci));
- } else if (pdev->irq >= 0)
- free_irq(pdev->irq, xhci_to_hcd(xhci));
+ if (!xhci->msix_entries)
+ return -EINVAL;
- return;
+ for (i = 0; i < xhci->msix_count; i++)
+ if (xhci->msix_entries[i].vector)
+ free_irq(xhci->msix_entries[i].vector,
+ xhci_to_hcd(xhci));
+ return 0;
}
/*
ret = pci_enable_msi(pdev);
if (ret) {
- xhci_err(xhci, "failed to allocate MSI entry\n");
+ xhci_dbg(xhci, "failed to allocate MSI entry\n");
return ret;
}
ret = request_irq(pdev->irq, (irq_handler_t)xhci_msi_irq,
0, "xhci_hcd", xhci_to_hcd(xhci));
if (ret) {
- xhci_err(xhci, "disable MSI interrupt\n");
+ xhci_dbg(xhci, "disable MSI interrupt\n");
pci_disable_msi(pdev);
}
}
/*
+ * Free IRQs
+ * free all IRQs request
+ */
+static void xhci_free_irq(struct xhci_hcd *xhci)
+{
+ struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
+ int ret;
+
+ /* return if using legacy interrupt */
+ if (xhci_to_hcd(xhci)->irq >= 0)
+ return;
+
+ ret = xhci_free_msi(xhci);
+ if (!ret)
+ return;
+ if (pdev->irq >= 0)
+ free_irq(pdev->irq, xhci_to_hcd(xhci));
+
+ return;
+}
+
+/*
* Set up MSI-X
*/
static int xhci_setup_msix(struct xhci_hcd *xhci)
ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count);
if (ret) {
- xhci_err(xhci, "Failed to enable MSI-X\n");
+ xhci_dbg(xhci, "Failed to enable MSI-X\n");
goto free_entries;
}
return ret;
disable_msix:
- xhci_err(xhci, "disable MSI-X interrupt\n");
+ xhci_dbg(xhci, "disable MSI-X interrupt\n");
xhci_free_irq(xhci);
pci_disable_msix(pdev);
free_entries:
return;
}
+static void xhci_msix_sync_irqs(struct xhci_hcd *xhci)
+{
+ int i;
+
+ if (xhci->msix_entries) {
+ for (i = 0; i < xhci->msix_count; i++)
+ synchronize_irq(xhci->msix_entries[i].vector);
+ }
+}
+
+static int xhci_try_enable_msi(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
+ int ret;
+
+ /*
+ * Some Fresco Logic host controllers advertise MSI, but fail to
+ * generate interrupts. Don't even try to enable MSI.
+ */
+ if (xhci->quirks & XHCI_BROKEN_MSI)
+ return 0;
+
+ /* unregister the legacy interrupt */
+ if (hcd->irq)
+ free_irq(hcd->irq, hcd);
+ hcd->irq = -1;
+
+ ret = xhci_setup_msix(xhci);
+ if (ret)
+ /* fall back to msi*/
+ ret = xhci_setup_msi(xhci);
+
+ if (!ret)
+ /* hcd->irq is -1, we have MSI */
+ return 0;
+
+ if (!pdev->irq) {
+ xhci_err(xhci, "No msi-x/msi found and no IRQ in BIOS\n");
+ return -EINVAL;
+ }
+
+ /* fall back to legacy interrupt*/
+ ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED,
+ hcd->irq_descr, hcd);
+ if (ret) {
+ xhci_err(xhci, "request interrupt %d failed\n",
+ pdev->irq);
+ return ret;
+ }
+ hcd->irq = pdev->irq;
+ return 0;
+}
+
+#else
+
+static int xhci_try_enable_msi(struct usb_hcd *hcd)
+{
+ return 0;
+}
+
+static void xhci_cleanup_msix(struct xhci_hcd *xhci)
+{
+}
+
+static void xhci_msix_sync_irqs(struct xhci_hcd *xhci)
+{
+}
+
+#endif
+
/*
* Initialize memory for HCD and xHC (one-time init).
*
xhci_dbg(xhci, "xhci_init\n");
spin_lock_init(&xhci->lock);
- if (link_quirk) {
+ if (xhci->hci_version == 0x95 && link_quirk) {
xhci_dbg(xhci, "QUIRK: Not clearing Link TRB chain bits.\n");
xhci->quirks |= XHCI_LINK_TRB_QUIRK;
} else {
#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
-void xhci_event_ring_work(unsigned long arg)
+static void xhci_event_ring_work(unsigned long arg)
{
unsigned long flags;
int temp;
spin_lock_irqsave(&xhci->lock, flags);
temp = xhci_readl(xhci, &xhci->op_regs->status);
xhci_dbg(xhci, "op reg status = 0x%x\n", temp);
- if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) {
+ if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) ||
+ (xhci->xhc_state & XHCI_STATE_HALTED)) {
xhci_dbg(xhci, "HW died, polling stopped.\n");
spin_unlock_irqrestore(&xhci->lock, flags);
return;
{
u32 temp;
u64 temp_64;
- u32 ret;
+ int ret;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
/* Start the xHCI host controller running only after the USB 2.0 roothub
* is setup.
return xhci_run_finished(xhci);
xhci_dbg(xhci, "xhci_run\n");
- /* unregister the legacy interrupt */
- if (hcd->irq)
- free_irq(hcd->irq, hcd);
- hcd->irq = -1;
- ret = xhci_setup_msix(xhci);
+ ret = xhci_try_enable_msi(hcd);
if (ret)
- /* fall back to msi*/
- ret = xhci_setup_msi(xhci);
-
- if (ret) {
- /* fall back to legacy interrupt*/
- ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED,
- hcd->irq_descr, hcd);
- if (ret) {
- xhci_err(xhci, "request interrupt %d failed\n",
- pdev->irq);
- return ret;
- }
- hcd->irq = pdev->irq;
- }
+ return ret;
#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
init_timer(&xhci->event_ring_timer);
xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp));
xhci_writel(xhci, ER_IRQ_ENABLE(temp),
&xhci->ir_set->irq_pending);
- xhci_print_ir_set(xhci, xhci->ir_set, 0);
+ xhci_print_ir_set(xhci, 0);
if (xhci->quirks & XHCI_NEC_HOST)
xhci_queue_vendor_command(xhci, 0, 0, 0,
del_timer_sync(&xhci->event_ring_timer);
#endif
+ if (xhci->quirks & XHCI_AMD_PLL_FIX)
+ usb_amd_dev_put();
+
xhci_dbg(xhci, "// Disabling event ring interrupts\n");
temp = xhci_readl(xhci, &xhci->op_regs->status);
xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status);
temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
xhci_writel(xhci, ER_IRQ_DISABLE(temp),
&xhci->ir_set->irq_pending);
- xhci_print_ir_set(xhci, xhci->ir_set, 0);
+ xhci_print_ir_set(xhci, 0);
xhci_dbg(xhci, "cleaning up memory\n");
xhci_mem_cleanup(xhci);
xhci_writel(xhci, xhci->s3.irq_control, &xhci->ir_set->irq_control);
xhci_writel(xhci, xhci->s3.erst_size, &xhci->ir_set->erst_size);
xhci_write_64(xhci, xhci->s3.erst_base, &xhci->ir_set->erst_base);
+ xhci_write_64(xhci, xhci->s3.erst_dequeue, &xhci->ir_set->erst_dequeue);
}
static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci)
ring = xhci->cmd_ring;
seg = ring->deq_seg;
do {
- memset(seg->trbs, 0, SEGMENT_SIZE);
+ memset(seg->trbs, 0,
+ sizeof(union xhci_trb) * (TRBS_PER_SEGMENT - 1));
+ seg->trbs[TRBS_PER_SEGMENT - 1].link.control &=
+ cpu_to_le32(~TRB_CYCLE);
seg = seg->next;
} while (seg != ring->deq_seg);
int rc = 0;
struct usb_hcd *hcd = xhci_to_hcd(xhci);
u32 command;
- int i;
spin_lock_irq(&xhci->lock);
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
/* step 5: remove core well power */
/* synchronize irq when using MSI-X */
- if (xhci->msix_entries) {
- for (i = 0; i < xhci->msix_count; i++)
- synchronize_irq(xhci->msix_entries[i].vector);
- }
+ xhci_msix_sync_irqs(xhci);
return rc;
}
u32 command, temp = 0;
struct usb_hcd *hcd = xhci_to_hcd(xhci);
struct usb_hcd *secondary_hcd;
- int retval;
+ int retval = 0;
/* Wait a bit if either of the roothubs need to settle from the
- * transistion into bus suspend.
+ * transition into bus suspend.
*/
if (time_before(jiffies, xhci->bus_state[0].next_statechange) ||
time_before(jiffies,
xhci->bus_state[1].next_statechange))
msleep(100);
+ set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+ set_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags);
+
spin_lock_irq(&xhci->lock);
+ if (xhci->quirks & XHCI_RESET_ON_RESUME)
+ hibernated = true;
if (!hibernated) {
/* step 1: restore register */
/* If restore operation fails, re-initialize the HC during resume */
if ((temp & STS_SRE) || hibernated) {
- usb_root_hub_lost_power(hcd->self.root_hub);
+ /* Let the USB core know _both_ roothubs lost power. */
+ usb_root_hub_lost_power(xhci->main_hcd->self.root_hub);
+ usb_root_hub_lost_power(xhci->shared_hcd->self.root_hub);
xhci_dbg(xhci, "Stop HCD\n");
xhci_halt(xhci);
temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
xhci_writel(xhci, ER_IRQ_DISABLE(temp),
&xhci->ir_set->irq_pending);
- xhci_print_ir_set(xhci, xhci->ir_set, 0);
+ xhci_print_ir_set(xhci, 0);
xhci_dbg(xhci, "cleaning up memory\n");
xhci_mem_cleanup(xhci);
return retval;
xhci_dbg(xhci, "Start the primary HCD\n");
retval = xhci_run(hcd->primary_hcd);
- if (retval)
- goto failed_restart;
-
- xhci_dbg(xhci, "Start the secondary HCD\n");
- retval = xhci_run(secondary_hcd);
if (!retval) {
- set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
- set_bit(HCD_FLAG_HW_ACCESSIBLE,
- &xhci->shared_hcd->flags);
+ xhci_dbg(xhci, "Start the secondary HCD\n");
+ retval = xhci_run(secondary_hcd);
}
-failed_restart:
hcd->state = HC_STATE_SUSPENDED;
xhci->shared_hcd->state = HC_STATE_SUSPENDED;
- return retval;
+ goto done;
}
/* step 4: set Run/Stop bit */
* Running endpoints by ringing their doorbells
*/
- set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
- set_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags);
-
spin_unlock_irq(&xhci->lock);
- return 0;
+
+ done:
+ if (retval == 0) {
+ usb_hcd_resume_root_hub(hcd);
+ usb_hcd_resume_root_hub(xhci->shared_hcd);
+ }
+ return retval;
}
#endif /* CONFIG_PM */
/* Returns 1 if the arguments are OK;
* returns 0 this is a root hub; returns -EINVAL for NULL pointers.
*/
-int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev,
+static int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev,
struct usb_host_endpoint *ep, int check_ep, bool check_virt_dev,
const char *func) {
struct xhci_hcd *xhci;
return 0;
}
+ xhci = hcd_to_xhci(hcd);
+ if (xhci->xhc_state & XHCI_STATE_HALTED)
+ return -ENODEV;
+
if (check_virt_dev) {
- xhci = hcd_to_xhci(hcd);
- if (!udev->slot_id || !xhci->devs
- || !xhci->devs[udev->slot_id]) {
+ if (!udev->slot_id || !xhci->devs[udev->slot_id]) {
printk(KERN_DEBUG "xHCI %s called with unaddressed "
"device\n", func);
return -EINVAL;
out_ctx = xhci->devs[slot_id]->out_ctx;
ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index);
- hw_max_packet_size = MAX_PACKET_DECODED(ep_ctx->ep_info2);
- max_packet_size = urb->dev->ep0.desc.wMaxPacketSize;
+ hw_max_packet_size = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2));
+ max_packet_size = usb_endpoint_maxp(&urb->dev->ep0.desc);
if (hw_max_packet_size != max_packet_size) {
xhci_dbg(xhci, "Max Packet Size for ep 0 changed.\n");
xhci_dbg(xhci, "Max packet size in usb_device = %d\n",
xhci->devs[slot_id]->out_ctx, ep_index);
in_ctx = xhci->devs[slot_id]->in_ctx;
ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index);
- ep_ctx->ep_info2 &= ~MAX_PACKET_MASK;
- ep_ctx->ep_info2 |= MAX_PACKET(max_packet_size);
+ ep_ctx->ep_info2 &= cpu_to_le32(~MAX_PACKET_MASK);
+ ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet_size));
/* Set up the input context flags for the command */
/* FIXME: This won't work if a non-default control endpoint
* changes max packet sizes.
*/
ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
- ctrl_ctx->add_flags = EP0_FLAG;
+ ctrl_ctx->add_flags = cpu_to_le32(EP0_FLAG);
ctrl_ctx->drop_flags = 0;
xhci_dbg(xhci, "Slot %d input context\n", slot_id);
/* Clean up the input context for later use by bandwidth
* functions.
*/
- ctrl_ctx->add_flags = SLOT_FLAG;
+ ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG);
}
return ret;
}
int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct xhci_td *buffer;
unsigned long flags;
int ret = 0;
unsigned int slot_id, ep_index;
if (!urb_priv)
return -ENOMEM;
+ buffer = kzalloc(size * sizeof(struct xhci_td), mem_flags);
+ if (!buffer) {
+ kfree(urb_priv);
+ return -ENOMEM;
+ }
+
for (i = 0; i < size; i++) {
- urb_priv->td[i] = kzalloc(sizeof(struct xhci_td), mem_flags);
- if (!urb_priv->td[i]) {
- urb_priv->length = i;
- xhci_urb_free_priv(xhci, urb_priv);
- return -ENOMEM;
- }
+ urb_priv->td[i] = buffer;
+ buffer++;
}
urb_priv->length = size;
if (urb->dev->speed == USB_SPEED_FULL) {
ret = xhci_check_maxpacket(xhci, slot_id,
ep_index, urb);
- if (ret < 0)
+ if (ret < 0) {
+ xhci_urb_free_priv(xhci, urb_priv);
+ urb->hcpriv = NULL;
return ret;
+ }
}
/* We have a spinlock and interrupts disabled, so we must pass
goto dying;
ret = xhci_queue_ctrl_tx(xhci, GFP_ATOMIC, urb,
slot_id, ep_index);
+ if (ret)
+ goto free_priv;
spin_unlock_irqrestore(&xhci->lock, flags);
} else if (usb_endpoint_xfer_bulk(&urb->ep->desc)) {
spin_lock_irqsave(&xhci->lock, flags);
ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb,
slot_id, ep_index);
}
+ if (ret)
+ goto free_priv;
spin_unlock_irqrestore(&xhci->lock, flags);
} else if (usb_endpoint_xfer_int(&urb->ep->desc)) {
spin_lock_irqsave(&xhci->lock, flags);
goto dying;
ret = xhci_queue_intr_tx(xhci, GFP_ATOMIC, urb,
slot_id, ep_index);
+ if (ret)
+ goto free_priv;
spin_unlock_irqrestore(&xhci->lock, flags);
} else {
spin_lock_irqsave(&xhci->lock, flags);
goto dying;
ret = xhci_queue_isoc_tx_prepare(xhci, GFP_ATOMIC, urb,
slot_id, ep_index);
+ if (ret)
+ goto free_priv;
spin_unlock_irqrestore(&xhci->lock, flags);
}
exit:
return ret;
dying:
- xhci_urb_free_priv(xhci, urb_priv);
- urb->hcpriv = NULL;
xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for "
"non-responsive xHCI host.\n",
urb->ep->desc.bEndpointAddress, urb);
+ ret = -ESHUTDOWN;
+free_priv:
+ xhci_urb_free_priv(xhci, urb_priv);
+ urb->hcpriv = NULL;
spin_unlock_irqrestore(&xhci->lock, flags);
- return -ESHUTDOWN;
+ return ret;
}
/* Get the right ring for the given URB.
if (ret || !urb->hcpriv)
goto done;
temp = xhci_readl(xhci, &xhci->op_regs->status);
- if (temp == 0xffffffff) {
+ if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_HALTED)) {
xhci_dbg(xhci, "HW died, freeing TD.\n");
urb_priv = urb->hcpriv;
+ for (i = urb_priv->td_cnt; i < urb_priv->length; i++) {
+ td = urb_priv->td[i];
+ if (!list_empty(&td->td_list))
+ list_del_init(&td->td_list);
+ if (!list_empty(&td->cancelled_td_list))
+ list_del_init(&td->cancelled_td_list);
+ }
usb_hcd_unlink_urb_from_ep(hcd, urb);
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_urb_free_priv(xhci, urb_priv);
return ret;
}
- if (xhci->xhc_state & XHCI_STATE_DYING) {
+ if ((xhci->xhc_state & XHCI_STATE_DYING) ||
+ (xhci->xhc_state & XHCI_STATE_HALTED)) {
xhci_dbg(xhci, "Ep 0x%x: URB %p to be canceled on "
"non-responsive xHCI host.\n",
urb->ep->desc.bEndpointAddress, urb);
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
- xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
+ if (xhci->xhc_state & XHCI_STATE_DYING)
+ return -ENODEV;
+ xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
drop_flag = xhci_get_endpoint_flag(&ep->desc);
if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) {
xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n",
/* If the HC already knows the endpoint is disabled,
* or the HCD has noted it is disabled, ignore this request
*/
- if ((ep_ctx->ep_info & EP_STATE_MASK) == EP_STATE_DISABLED ||
- ctrl_ctx->drop_flags & xhci_get_endpoint_flag(&ep->desc)) {
+ if (((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) ==
+ cpu_to_le32(EP_STATE_DISABLED)) ||
+ le32_to_cpu(ctrl_ctx->drop_flags) &
+ xhci_get_endpoint_flag(&ep->desc)) {
xhci_warn(xhci, "xHCI %s called with disabled ep %p\n",
__func__, ep);
return 0;
}
- ctrl_ctx->drop_flags |= drop_flag;
- new_drop_flags = ctrl_ctx->drop_flags;
+ ctrl_ctx->drop_flags |= cpu_to_le32(drop_flag);
+ new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags);
- ctrl_ctx->add_flags &= ~drop_flag;
- new_add_flags = ctrl_ctx->add_flags;
+ ctrl_ctx->add_flags &= cpu_to_le32(~drop_flag);
+ new_add_flags = le32_to_cpu(ctrl_ctx->add_flags);
- last_ctx = xhci_last_valid_endpoint(ctrl_ctx->add_flags);
+ last_ctx = xhci_last_valid_endpoint(le32_to_cpu(ctrl_ctx->add_flags));
slot_ctx = xhci_get_slot_ctx(xhci, in_ctx);
/* Update the last valid endpoint context, if we deleted the last one */
- if ((slot_ctx->dev_info & LAST_CTX_MASK) > LAST_CTX(last_ctx)) {
- slot_ctx->dev_info &= ~LAST_CTX_MASK;
- slot_ctx->dev_info |= LAST_CTX(last_ctx);
+ if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) >
+ LAST_CTX(last_ctx)) {
+ slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK);
+ slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx));
}
- new_slot_info = slot_ctx->dev_info;
+ new_slot_info = le32_to_cpu(slot_ctx->dev_info);
xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep);
u32 added_ctxs;
unsigned int last_ctx;
u32 new_add_flags, new_drop_flags, new_slot_info;
+ struct xhci_virt_device *virt_dev;
int ret = 0;
ret = xhci_check_args(hcd, udev, ep, 1, true, __func__);
return ret;
}
xhci = hcd_to_xhci(hcd);
+ if (xhci->xhc_state & XHCI_STATE_DYING)
+ return -ENODEV;
added_ctxs = xhci_get_endpoint_flag(&ep->desc);
last_ctx = xhci_last_valid_endpoint(added_ctxs);
return 0;
}
- in_ctx = xhci->devs[udev->slot_id]->in_ctx;
- out_ctx = xhci->devs[udev->slot_id]->out_ctx;
+ virt_dev = xhci->devs[udev->slot_id];
+ in_ctx = virt_dev->in_ctx;
+ out_ctx = virt_dev->out_ctx;
ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
ep_index = xhci_get_endpoint_index(&ep->desc);
ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index);
+
+ /* If this endpoint is already in use, and the upper layers are trying
+ * to add it again without dropping it, reject the addition.
+ */
+ if (virt_dev->eps[ep_index].ring &&
+ !(le32_to_cpu(ctrl_ctx->drop_flags) &
+ xhci_get_endpoint_flag(&ep->desc))) {
+ xhci_warn(xhci, "Trying to add endpoint 0x%x "
+ "without dropping it.\n",
+ (unsigned int) ep->desc.bEndpointAddress);
+ return -EINVAL;
+ }
+
/* If the HCD has already noted the endpoint is enabled,
* ignore this request.
*/
- if (ctrl_ctx->add_flags & xhci_get_endpoint_flag(&ep->desc)) {
+ if (le32_to_cpu(ctrl_ctx->add_flags) &
+ xhci_get_endpoint_flag(&ep->desc)) {
xhci_warn(xhci, "xHCI %s called with enabled ep %p\n",
__func__, ep);
return 0;
* process context, not interrupt context (or so documenation
* for usb_set_interface() and usb_set_configuration() claim).
*/
- if (xhci_endpoint_init(xhci, xhci->devs[udev->slot_id],
- udev, ep, GFP_NOIO) < 0) {
+ if (xhci_endpoint_init(xhci, virt_dev, udev, ep, GFP_NOIO) < 0) {
dev_dbg(&udev->dev, "%s - could not initialize ep %#x\n",
__func__, ep->desc.bEndpointAddress);
return -ENOMEM;
}
- ctrl_ctx->add_flags |= added_ctxs;
- new_add_flags = ctrl_ctx->add_flags;
+ ctrl_ctx->add_flags |= cpu_to_le32(added_ctxs);
+ new_add_flags = le32_to_cpu(ctrl_ctx->add_flags);
/* If xhci_endpoint_disable() was called for this endpoint, but the
* xHC hasn't been notified yet through the check_bandwidth() call,
* descriptors. We must drop and re-add this endpoint, so we leave the
* drop flags alone.
*/
- new_drop_flags = ctrl_ctx->drop_flags;
+ new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags);
slot_ctx = xhci_get_slot_ctx(xhci, in_ctx);
/* Update the last valid endpoint context, if we just added one past */
- if ((slot_ctx->dev_info & LAST_CTX_MASK) < LAST_CTX(last_ctx)) {
- slot_ctx->dev_info &= ~LAST_CTX_MASK;
- slot_ctx->dev_info |= LAST_CTX(last_ctx);
+ if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) <
+ LAST_CTX(last_ctx)) {
+ slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK);
+ slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx));
}
- new_slot_info = slot_ctx->dev_info;
+ new_slot_info = le32_to_cpu(slot_ctx->dev_info);
/* Store the usb_device pointer for later use */
ep->hcpriv = udev;
ctrl_ctx->drop_flags = 0;
ctrl_ctx->add_flags = 0;
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
- slot_ctx->dev_info &= ~LAST_CTX_MASK;
+ slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK);
/* Endpoint 0 is always valid */
- slot_ctx->dev_info |= LAST_CTX(1);
+ slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1));
for (i = 1; i < 31; ++i) {
ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, i);
ep_ctx->ep_info = 0;
}
static int xhci_configure_endpoint_result(struct xhci_hcd *xhci,
- struct usb_device *udev, int *cmd_status)
+ struct usb_device *udev, u32 *cmd_status)
{
int ret;
/* FIXME: can we allocate more resources for the HC? */
break;
case COMP_BW_ERR:
+ case COMP_2ND_BW_ERR:
dev_warn(&udev->dev, "Not enough bandwidth "
"for new device state.\n");
ret = -ENOSPC;
"and endpoint is not disabled.\n");
ret = -EINVAL;
break;
+ case COMP_DEV_ERR:
+ dev_warn(&udev->dev, "ERROR: Incompatible device for endpoint "
+ "configure command.\n");
+ ret = -ENODEV;
+ break;
case COMP_SUCCESS:
dev_dbg(&udev->dev, "Successful Endpoint Configure command\n");
ret = 0;
}
static int xhci_evaluate_context_result(struct xhci_hcd *xhci,
- struct usb_device *udev, int *cmd_status)
+ struct usb_device *udev, u32 *cmd_status)
{
int ret;
struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id];
xhci_dbg_ctx(xhci, virt_dev->out_ctx, 1);
ret = -EINVAL;
break;
+ case COMP_DEV_ERR:
+ dev_warn(&udev->dev, "ERROR: Incompatible device for evaluate "
+ "context command.\n");
+ ret = -ENODEV;
+ break;
+ case COMP_MEL_ERR:
+ /* Max Exit Latency too large error */
+ dev_warn(&udev->dev, "WARN: Max Exit Latency too large\n");
+ ret = -EINVAL;
+ break;
case COMP_SUCCESS:
dev_dbg(&udev->dev, "Successful evaluate context command\n");
ret = 0;
return ret;
}
-/* Issue a configure endpoint command or evaluate context command
- * and wait for it to finish.
- */
-static int xhci_configure_endpoint(struct xhci_hcd *xhci,
- struct usb_device *udev,
- struct xhci_command *command,
- bool ctx_change, bool must_succeed)
+static u32 xhci_count_num_new_endpoints(struct xhci_hcd *xhci,
+ struct xhci_container_ctx *in_ctx)
{
- int ret;
- int timeleft;
- unsigned long flags;
- struct xhci_container_ctx *in_ctx;
- struct completion *cmd_completion;
- int *cmd_status;
- struct xhci_virt_device *virt_dev;
+ struct xhci_input_control_ctx *ctrl_ctx;
+ u32 valid_add_flags;
+ u32 valid_drop_flags;
- spin_lock_irqsave(&xhci->lock, flags);
- virt_dev = xhci->devs[udev->slot_id];
- if (command) {
- in_ctx = command->in_ctx;
- cmd_completion = command->completion;
- cmd_status = &command->status;
- command->command_trb = xhci->cmd_ring->enqueue;
+ ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
+ /* Ignore the slot flag (bit 0), and the default control endpoint flag
+ * (bit 1). The default control endpoint is added during the Address
+ * Device command and is never removed until the slot is disabled.
+ */
+ valid_add_flags = ctrl_ctx->add_flags >> 2;
+ valid_drop_flags = ctrl_ctx->drop_flags >> 2;
- /* Enqueue pointer can be left pointing to the link TRB,
- * we must handle that
- */
- if ((command->command_trb->link.control & TRB_TYPE_BITMASK)
- == TRB_TYPE(TRB_LINK))
- command->command_trb =
- xhci->cmd_ring->enq_seg->next->trbs;
+ /* Use hweight32 to count the number of ones in the add flags, or
+ * number of endpoints added. Don't count endpoints that are changed
+ * (both added and dropped).
+ */
+ return hweight32(valid_add_flags) -
+ hweight32(valid_add_flags & valid_drop_flags);
+}
- list_add_tail(&command->cmd_list, &virt_dev->cmd_list);
- } else {
- in_ctx = virt_dev->in_ctx;
- cmd_completion = &virt_dev->cmd_completion;
- cmd_status = &virt_dev->cmd_status;
- }
- init_completion(cmd_completion);
+static unsigned int xhci_count_num_dropped_endpoints(struct xhci_hcd *xhci,
+ struct xhci_container_ctx *in_ctx)
+{
+ struct xhci_input_control_ctx *ctrl_ctx;
+ u32 valid_add_flags;
+ u32 valid_drop_flags;
- if (!ctx_change)
- ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma,
- udev->slot_id, must_succeed);
- else
- ret = xhci_queue_evaluate_context(xhci, in_ctx->dma,
- udev->slot_id);
- if (ret < 0) {
- if (command)
- list_del(&command->cmd_list);
- spin_unlock_irqrestore(&xhci->lock, flags);
- xhci_dbg(xhci, "FIXME allocate a new ring segment\n");
+ ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
+ valid_add_flags = ctrl_ctx->add_flags >> 2;
+ valid_drop_flags = ctrl_ctx->drop_flags >> 2;
+
+ return hweight32(valid_drop_flags) -
+ hweight32(valid_add_flags & valid_drop_flags);
+}
+
+/*
+ * We need to reserve the new number of endpoints before the configure endpoint
+ * command completes. We can't subtract the dropped endpoints from the number
+ * of active endpoints until the command completes because we can oversubscribe
+ * the host in this case:
+ *
+ * - the first configure endpoint command drops more endpoints than it adds
+ * - a second configure endpoint command that adds more endpoints is queued
+ * - the first configure endpoint command fails, so the config is unchanged
+ * - the second command may succeed, even though there isn't enough resources
+ *
+ * Must be called with xhci->lock held.
+ */
+static int xhci_reserve_host_resources(struct xhci_hcd *xhci,
+ struct xhci_container_ctx *in_ctx)
+{
+ u32 added_eps;
+
+ added_eps = xhci_count_num_new_endpoints(xhci, in_ctx);
+ if (xhci->num_active_eps + added_eps > xhci->limit_active_eps) {
+ xhci_dbg(xhci, "Not enough ep ctxs: "
+ "%u active, need to add %u, limit is %u.\n",
+ xhci->num_active_eps, added_eps,
+ xhci->limit_active_eps);
return -ENOMEM;
}
- xhci_ring_cmd_db(xhci);
- spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci->num_active_eps += added_eps;
+ xhci_dbg(xhci, "Adding %u ep ctxs, %u now active.\n", added_eps,
+ xhci->num_active_eps);
+ return 0;
+}
- /* Wait for the configure endpoint command to complete */
- timeleft = wait_for_completion_interruptible_timeout(
- cmd_completion,
- USB_CTRL_SET_TIMEOUT);
- if (timeleft <= 0) {
- xhci_warn(xhci, "%s while waiting for %s command\n",
- timeleft == 0 ? "Timeout" : "Signal",
- ctx_change == 0 ?
- "configure endpoint" :
- "evaluate context");
- /* FIXME cancel the configure endpoint command */
- return -ETIME;
- }
+/*
+ * The configure endpoint was failed by the xHC for some other reason, so we
+ * need to revert the resources that failed configuration would have used.
+ *
+ * Must be called with xhci->lock held.
+ */
+static void xhci_free_host_resources(struct xhci_hcd *xhci,
+ struct xhci_container_ctx *in_ctx)
+{
+ u32 num_failed_eps;
- if (!ctx_change)
- return xhci_configure_endpoint_result(xhci, udev, cmd_status);
- return xhci_evaluate_context_result(xhci, udev, cmd_status);
+ num_failed_eps = xhci_count_num_new_endpoints(xhci, in_ctx);
+ xhci->num_active_eps -= num_failed_eps;
+ xhci_dbg(xhci, "Removing %u failed ep ctxs, %u now active.\n",
+ num_failed_eps,
+ xhci->num_active_eps);
}
-/* Called after one or more calls to xhci_add_endpoint() or
- * xhci_drop_endpoint(). If this call fails, the USB core is expected
- * to call xhci_reset_bandwidth().
+/*
+ * Now that the command has completed, clean up the active endpoint count by
+ * subtracting out the endpoints that were dropped (but not changed).
*
- * Since we are in the middle of changing either configuration or
- * installing a new alt setting, the USB core won't allow URBs to be
- * enqueued for any endpoint on the old config or interface. Nothing
- * else should be touching the xhci->devs[slot_id] structure, so we
- * don't need to take the xhci->lock for manipulating that.
+ * Must be called with xhci->lock held.
*/
-int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
+static void xhci_finish_resource_reservation(struct xhci_hcd *xhci,
+ struct xhci_container_ctx *in_ctx)
+{
+ u32 num_dropped_eps;
+
+ num_dropped_eps = xhci_count_num_dropped_endpoints(xhci, in_ctx);
+ xhci->num_active_eps -= num_dropped_eps;
+ if (num_dropped_eps)
+ xhci_dbg(xhci, "Removing %u dropped ep ctxs, %u now active.\n",
+ num_dropped_eps,
+ xhci->num_active_eps);
+}
+
+unsigned int xhci_get_block_size(struct usb_device *udev)
+{
+ switch (udev->speed) {
+ case USB_SPEED_LOW:
+ case USB_SPEED_FULL:
+ return FS_BLOCK;
+ case USB_SPEED_HIGH:
+ return HS_BLOCK;
+ case USB_SPEED_SUPER:
+ return SS_BLOCK;
+ case USB_SPEED_UNKNOWN:
+ case USB_SPEED_WIRELESS:
+ default:
+ /* Should never happen */
+ return 1;
+ }
+}
+
+unsigned int xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw)
+{
+ if (interval_bw->overhead[LS_OVERHEAD_TYPE])
+ return LS_OVERHEAD;
+ if (interval_bw->overhead[FS_OVERHEAD_TYPE])
+ return FS_OVERHEAD;
+ return HS_OVERHEAD;
+}
+
+/* If we are changing a LS/FS device under a HS hub,
+ * make sure (if we are activating a new TT) that the HS bus has enough
+ * bandwidth for this new TT.
+ */
+static int xhci_check_tt_bw_table(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev,
+ int old_active_eps)
+{
+ struct xhci_interval_bw_table *bw_table;
+ struct xhci_tt_bw_info *tt_info;
+
+ /* Find the bandwidth table for the root port this TT is attached to. */
+ bw_table = &xhci->rh_bw[virt_dev->real_port - 1].bw_table;
+ tt_info = virt_dev->tt_info;
+ /* If this TT already had active endpoints, the bandwidth for this TT
+ * has already been added. Removing all periodic endpoints (and thus
+ * making the TT enactive) will only decrease the bandwidth used.
+ */
+ if (old_active_eps)
+ return 0;
+ if (old_active_eps == 0 && tt_info->active_eps != 0) {
+ if (bw_table->bw_used + TT_HS_OVERHEAD > HS_BW_LIMIT)
+ return -ENOMEM;
+ return 0;
+ }
+ /* Not sure why we would have no new active endpoints...
+ *
+ * Maybe because of an Evaluate Context change for a hub update or a
+ * control endpoint 0 max packet size change?
+ * FIXME: skip the bandwidth calculation in that case.
+ */
+ return 0;
+}
+
+static int xhci_check_ss_bw(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev)
+{
+ unsigned int bw_reserved;
+
+ bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_IN, 100);
+ if (virt_dev->bw_table->ss_bw_in > (SS_BW_LIMIT_IN - bw_reserved))
+ return -ENOMEM;
+
+ bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_OUT, 100);
+ if (virt_dev->bw_table->ss_bw_out > (SS_BW_LIMIT_OUT - bw_reserved))
+ return -ENOMEM;
+
+ return 0;
+}
+
+/*
+ * This algorithm is a very conservative estimate of the worst-case scheduling
+ * scenario for any one interval. The hardware dynamically schedules the
+ * packets, so we can't tell which microframe could be the limiting factor in
+ * the bandwidth scheduling. This only takes into account periodic endpoints.
+ *
+ * Obviously, we can't solve an NP complete problem to find the minimum worst
+ * case scenario. Instead, we come up with an estimate that is no less than
+ * the worst case bandwidth used for any one microframe, but may be an
+ * over-estimate.
+ *
+ * We walk the requirements for each endpoint by interval, starting with the
+ * smallest interval, and place packets in the schedule where there is only one
+ * possible way to schedule packets for that interval. In order to simplify
+ * this algorithm, we record the largest max packet size for each interval, and
+ * assume all packets will be that size.
+ *
+ * For interval 0, we obviously must schedule all packets for each interval.
+ * The bandwidth for interval 0 is just the amount of data to be transmitted
+ * (the sum of all max ESIT payload sizes, plus any overhead per packet times
+ * the number of packets).
+ *
+ * For interval 1, we have two possible microframes to schedule those packets
+ * in. For this algorithm, if we can schedule the same number of packets for
+ * each possible scheduling opportunity (each microframe), we will do so. The
+ * remaining number of packets will be saved to be transmitted in the gaps in
+ * the next interval's scheduling sequence.
+ *
+ * As we move those remaining packets to be scheduled with interval 2 packets,
+ * we have to double the number of remaining packets to transmit. This is
+ * because the intervals are actually powers of 2, and we would be transmitting
+ * the previous interval's packets twice in this interval. We also have to be
+ * sure that when we look at the largest max packet size for this interval, we
+ * also look at the largest max packet size for the remaining packets and take
+ * the greater of the two.
+ *
+ * The algorithm continues to evenly distribute packets in each scheduling
+ * opportunity, and push the remaining packets out, until we get to the last
+ * interval. Then those packets and their associated overhead are just added
+ * to the bandwidth used.
+ */
+static int xhci_check_bw_table(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev,
+ int old_active_eps)
+{
+ unsigned int bw_reserved;
+ unsigned int max_bandwidth;
+ unsigned int bw_used;
+ unsigned int block_size;
+ struct xhci_interval_bw_table *bw_table;
+ unsigned int packet_size = 0;
+ unsigned int overhead = 0;
+ unsigned int packets_transmitted = 0;
+ unsigned int packets_remaining = 0;
+ unsigned int i;
+
+ if (virt_dev->udev->speed == USB_SPEED_SUPER)
+ return xhci_check_ss_bw(xhci, virt_dev);
+
+ if (virt_dev->udev->speed == USB_SPEED_HIGH) {
+ max_bandwidth = HS_BW_LIMIT;
+ /* Convert percent of bus BW reserved to blocks reserved */
+ bw_reserved = DIV_ROUND_UP(HS_BW_RESERVED * max_bandwidth, 100);
+ } else {
+ max_bandwidth = FS_BW_LIMIT;
+ bw_reserved = DIV_ROUND_UP(FS_BW_RESERVED * max_bandwidth, 100);
+ }
+
+ bw_table = virt_dev->bw_table;
+ /* We need to translate the max packet size and max ESIT payloads into
+ * the units the hardware uses.
+ */
+ block_size = xhci_get_block_size(virt_dev->udev);
+
+ /* If we are manipulating a LS/FS device under a HS hub, double check
+ * that the HS bus has enough bandwidth if we are activing a new TT.
+ */
+ if (virt_dev->tt_info) {
+ xhci_dbg(xhci, "Recalculating BW for rootport %u\n",
+ virt_dev->real_port);
+ if (xhci_check_tt_bw_table(xhci, virt_dev, old_active_eps)) {
+ xhci_warn(xhci, "Not enough bandwidth on HS bus for "
+ "newly activated TT.\n");
+ return -ENOMEM;
+ }
+ xhci_dbg(xhci, "Recalculating BW for TT slot %u port %u\n",
+ virt_dev->tt_info->slot_id,
+ virt_dev->tt_info->ttport);
+ } else {
+ xhci_dbg(xhci, "Recalculating BW for rootport %u\n",
+ virt_dev->real_port);
+ }
+
+ /* Add in how much bandwidth will be used for interval zero, or the
+ * rounded max ESIT payload + number of packets * largest overhead.
+ */
+ bw_used = DIV_ROUND_UP(bw_table->interval0_esit_payload, block_size) +
+ bw_table->interval_bw[0].num_packets *
+ xhci_get_largest_overhead(&bw_table->interval_bw[0]);
+
+ for (i = 1; i < XHCI_MAX_INTERVAL; i++) {
+ unsigned int bw_added;
+ unsigned int largest_mps;
+ unsigned int interval_overhead;
+
+ /*
+ * How many packets could we transmit in this interval?
+ * If packets didn't fit in the previous interval, we will need
+ * to transmit that many packets twice within this interval.
+ */
+ packets_remaining = 2 * packets_remaining +
+ bw_table->interval_bw[i].num_packets;
+
+ /* Find the largest max packet size of this or the previous
+ * interval.
+ */
+ if (list_empty(&bw_table->interval_bw[i].endpoints))
+ largest_mps = 0;
+ else {
+ struct xhci_virt_ep *virt_ep;
+ struct list_head *ep_entry;
+
+ ep_entry = bw_table->interval_bw[i].endpoints.next;
+ virt_ep = list_entry(ep_entry,
+ struct xhci_virt_ep, bw_endpoint_list);
+ /* Convert to blocks, rounding up */
+ largest_mps = DIV_ROUND_UP(
+ virt_ep->bw_info.max_packet_size,
+ block_size);
+ }
+ if (largest_mps > packet_size)
+ packet_size = largest_mps;
+
+ /* Use the larger overhead of this or the previous interval. */
+ interval_overhead = xhci_get_largest_overhead(
+ &bw_table->interval_bw[i]);
+ if (interval_overhead > overhead)
+ overhead = interval_overhead;
+
+ /* How many packets can we evenly distribute across
+ * (1 << (i + 1)) possible scheduling opportunities?
+ */
+ packets_transmitted = packets_remaining >> (i + 1);
+
+ /* Add in the bandwidth used for those scheduled packets */
+ bw_added = packets_transmitted * (overhead + packet_size);
+
+ /* How many packets do we have remaining to transmit? */
+ packets_remaining = packets_remaining % (1 << (i + 1));
+
+ /* What largest max packet size should those packets have? */
+ /* If we've transmitted all packets, don't carry over the
+ * largest packet size.
+ */
+ if (packets_remaining == 0) {
+ packet_size = 0;
+ overhead = 0;
+ } else if (packets_transmitted > 0) {
+ /* Otherwise if we do have remaining packets, and we've
+ * scheduled some packets in this interval, take the
+ * largest max packet size from endpoints with this
+ * interval.
+ */
+ packet_size = largest_mps;
+ overhead = interval_overhead;
+ }
+ /* Otherwise carry over packet_size and overhead from the last
+ * time we had a remainder.
+ */
+ bw_used += bw_added;
+ if (bw_used > max_bandwidth) {
+ xhci_warn(xhci, "Not enough bandwidth. "
+ "Proposed: %u, Max: %u\n",
+ bw_used, max_bandwidth);
+ return -ENOMEM;
+ }
+ }
+ /*
+ * Ok, we know we have some packets left over after even-handedly
+ * scheduling interval 15. We don't know which microframes they will
+ * fit into, so we over-schedule and say they will be scheduled every
+ * microframe.
+ */
+ if (packets_remaining > 0)
+ bw_used += overhead + packet_size;
+
+ if (!virt_dev->tt_info && virt_dev->udev->speed == USB_SPEED_HIGH) {
+ unsigned int port_index = virt_dev->real_port - 1;
+
+ /* OK, we're manipulating a HS device attached to a
+ * root port bandwidth domain. Include the number of active TTs
+ * in the bandwidth used.
+ */
+ bw_used += TT_HS_OVERHEAD *
+ xhci->rh_bw[port_index].num_active_tts;
+ }
+
+ xhci_dbg(xhci, "Final bandwidth: %u, Limit: %u, Reserved: %u, "
+ "Available: %u " "percent\n",
+ bw_used, max_bandwidth, bw_reserved,
+ (max_bandwidth - bw_used - bw_reserved) * 100 /
+ max_bandwidth);
+
+ bw_used += bw_reserved;
+ if (bw_used > max_bandwidth) {
+ xhci_warn(xhci, "Not enough bandwidth. Proposed: %u, Max: %u\n",
+ bw_used, max_bandwidth);
+ return -ENOMEM;
+ }
+
+ bw_table->bw_used = bw_used;
+ return 0;
+}
+
+static bool xhci_is_async_ep(unsigned int ep_type)
+{
+ return (ep_type != ISOC_OUT_EP && ep_type != INT_OUT_EP &&
+ ep_type != ISOC_IN_EP &&
+ ep_type != INT_IN_EP);
+}
+
+static bool xhci_is_sync_in_ep(unsigned int ep_type)
+{
+ return (ep_type == ISOC_IN_EP || ep_type != INT_IN_EP);
+}
+
+static unsigned int xhci_get_ss_bw_consumed(struct xhci_bw_info *ep_bw)
+{
+ unsigned int mps = DIV_ROUND_UP(ep_bw->max_packet_size, SS_BLOCK);
+
+ if (ep_bw->ep_interval == 0)
+ return SS_OVERHEAD_BURST +
+ (ep_bw->mult * ep_bw->num_packets *
+ (SS_OVERHEAD + mps));
+ return DIV_ROUND_UP(ep_bw->mult * ep_bw->num_packets *
+ (SS_OVERHEAD + mps + SS_OVERHEAD_BURST),
+ 1 << ep_bw->ep_interval);
+
+}
+
+void xhci_drop_ep_from_interval_table(struct xhci_hcd *xhci,
+ struct xhci_bw_info *ep_bw,
+ struct xhci_interval_bw_table *bw_table,
+ struct usb_device *udev,
+ struct xhci_virt_ep *virt_ep,
+ struct xhci_tt_bw_info *tt_info)
+{
+ struct xhci_interval_bw *interval_bw;
+ int normalized_interval;
+
+ if (xhci_is_async_ep(ep_bw->type))
+ return;
+
+ if (udev->speed == USB_SPEED_SUPER) {
+ if (xhci_is_sync_in_ep(ep_bw->type))
+ xhci->devs[udev->slot_id]->bw_table->ss_bw_in -=
+ xhci_get_ss_bw_consumed(ep_bw);
+ else
+ xhci->devs[udev->slot_id]->bw_table->ss_bw_out -=
+ xhci_get_ss_bw_consumed(ep_bw);
+ return;
+ }
+
+ /* SuperSpeed endpoints never get added to intervals in the table, so
+ * this check is only valid for HS/FS/LS devices.
+ */
+ if (list_empty(&virt_ep->bw_endpoint_list))
+ return;
+ /* For LS/FS devices, we need to translate the interval expressed in
+ * microframes to frames.
+ */
+ if (udev->speed == USB_SPEED_HIGH)
+ normalized_interval = ep_bw->ep_interval;
+ else
+ normalized_interval = ep_bw->ep_interval - 3;
+
+ if (normalized_interval == 0)
+ bw_table->interval0_esit_payload -= ep_bw->max_esit_payload;
+ interval_bw = &bw_table->interval_bw[normalized_interval];
+ interval_bw->num_packets -= ep_bw->num_packets;
+ switch (udev->speed) {
+ case USB_SPEED_LOW:
+ interval_bw->overhead[LS_OVERHEAD_TYPE] -= 1;
+ break;
+ case USB_SPEED_FULL:
+ interval_bw->overhead[FS_OVERHEAD_TYPE] -= 1;
+ break;
+ case USB_SPEED_HIGH:
+ interval_bw->overhead[HS_OVERHEAD_TYPE] -= 1;
+ break;
+ case USB_SPEED_SUPER:
+ case USB_SPEED_UNKNOWN:
+ case USB_SPEED_WIRELESS:
+ /* Should never happen because only LS/FS/HS endpoints will get
+ * added to the endpoint list.
+ */
+ return;
+ }
+ if (tt_info)
+ tt_info->active_eps -= 1;
+ list_del_init(&virt_ep->bw_endpoint_list);
+}
+
+static void xhci_add_ep_to_interval_table(struct xhci_hcd *xhci,
+ struct xhci_bw_info *ep_bw,
+ struct xhci_interval_bw_table *bw_table,
+ struct usb_device *udev,
+ struct xhci_virt_ep *virt_ep,
+ struct xhci_tt_bw_info *tt_info)
+{
+ struct xhci_interval_bw *interval_bw;
+ struct xhci_virt_ep *smaller_ep;
+ int normalized_interval;
+
+ if (xhci_is_async_ep(ep_bw->type))
+ return;
+
+ if (udev->speed == USB_SPEED_SUPER) {
+ if (xhci_is_sync_in_ep(ep_bw->type))
+ xhci->devs[udev->slot_id]->bw_table->ss_bw_in +=
+ xhci_get_ss_bw_consumed(ep_bw);
+ else
+ xhci->devs[udev->slot_id]->bw_table->ss_bw_out +=
+ xhci_get_ss_bw_consumed(ep_bw);
+ return;
+ }
+
+ /* For LS/FS devices, we need to translate the interval expressed in
+ * microframes to frames.
+ */
+ if (udev->speed == USB_SPEED_HIGH)
+ normalized_interval = ep_bw->ep_interval;
+ else
+ normalized_interval = ep_bw->ep_interval - 3;
+
+ if (normalized_interval == 0)
+ bw_table->interval0_esit_payload += ep_bw->max_esit_payload;
+ interval_bw = &bw_table->interval_bw[normalized_interval];
+ interval_bw->num_packets += ep_bw->num_packets;
+ switch (udev->speed) {
+ case USB_SPEED_LOW:
+ interval_bw->overhead[LS_OVERHEAD_TYPE] += 1;
+ break;
+ case USB_SPEED_FULL:
+ interval_bw->overhead[FS_OVERHEAD_TYPE] += 1;
+ break;
+ case USB_SPEED_HIGH:
+ interval_bw->overhead[HS_OVERHEAD_TYPE] += 1;
+ break;
+ case USB_SPEED_SUPER:
+ case USB_SPEED_UNKNOWN:
+ case USB_SPEED_WIRELESS:
+ /* Should never happen because only LS/FS/HS endpoints will get
+ * added to the endpoint list.
+ */
+ return;
+ }
+
+ if (tt_info)
+ tt_info->active_eps += 1;
+ /* Insert the endpoint into the list, largest max packet size first. */
+ list_for_each_entry(smaller_ep, &interval_bw->endpoints,
+ bw_endpoint_list) {
+ if (ep_bw->max_packet_size >=
+ smaller_ep->bw_info.max_packet_size) {
+ /* Add the new ep before the smaller endpoint */
+ list_add_tail(&virt_ep->bw_endpoint_list,
+ &smaller_ep->bw_endpoint_list);
+ return;
+ }
+ }
+ /* Add the new endpoint at the end of the list. */
+ list_add_tail(&virt_ep->bw_endpoint_list,
+ &interval_bw->endpoints);
+}
+
+void xhci_update_tt_active_eps(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev,
+ int old_active_eps)
+{
+ struct xhci_root_port_bw_info *rh_bw_info;
+ if (!virt_dev->tt_info)
+ return;
+
+ rh_bw_info = &xhci->rh_bw[virt_dev->real_port - 1];
+ if (old_active_eps == 0 &&
+ virt_dev->tt_info->active_eps != 0) {
+ rh_bw_info->num_active_tts += 1;
+ rh_bw_info->bw_table.bw_used += TT_HS_OVERHEAD;
+ } else if (old_active_eps != 0 &&
+ virt_dev->tt_info->active_eps == 0) {
+ rh_bw_info->num_active_tts -= 1;
+ rh_bw_info->bw_table.bw_used -= TT_HS_OVERHEAD;
+ }
+}
+
+static int xhci_reserve_bandwidth(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev,
+ struct xhci_container_ctx *in_ctx)
+{
+ struct xhci_bw_info ep_bw_info[31];
+ int i;
+ struct xhci_input_control_ctx *ctrl_ctx;
+ int old_active_eps = 0;
+
+ if (virt_dev->tt_info)
+ old_active_eps = virt_dev->tt_info->active_eps;
+
+ ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
+
+ for (i = 0; i < 31; i++) {
+ if (!EP_IS_ADDED(ctrl_ctx, i) && !EP_IS_DROPPED(ctrl_ctx, i))
+ continue;
+
+ /* Make a copy of the BW info in case we need to revert this */
+ memcpy(&ep_bw_info[i], &virt_dev->eps[i].bw_info,
+ sizeof(ep_bw_info[i]));
+ /* Drop the endpoint from the interval table if the endpoint is
+ * being dropped or changed.
+ */
+ if (EP_IS_DROPPED(ctrl_ctx, i))
+ xhci_drop_ep_from_interval_table(xhci,
+ &virt_dev->eps[i].bw_info,
+ virt_dev->bw_table,
+ virt_dev->udev,
+ &virt_dev->eps[i],
+ virt_dev->tt_info);
+ }
+ /* Overwrite the information stored in the endpoints' bw_info */
+ xhci_update_bw_info(xhci, virt_dev->in_ctx, ctrl_ctx, virt_dev);
+ for (i = 0; i < 31; i++) {
+ /* Add any changed or added endpoints to the interval table */
+ if (EP_IS_ADDED(ctrl_ctx, i))
+ xhci_add_ep_to_interval_table(xhci,
+ &virt_dev->eps[i].bw_info,
+ virt_dev->bw_table,
+ virt_dev->udev,
+ &virt_dev->eps[i],
+ virt_dev->tt_info);
+ }
+
+ if (!xhci_check_bw_table(xhci, virt_dev, old_active_eps)) {
+ /* Ok, this fits in the bandwidth we have.
+ * Update the number of active TTs.
+ */
+ xhci_update_tt_active_eps(xhci, virt_dev, old_active_eps);
+ return 0;
+ }
+
+ /* We don't have enough bandwidth for this, revert the stored info. */
+ for (i = 0; i < 31; i++) {
+ if (!EP_IS_ADDED(ctrl_ctx, i) && !EP_IS_DROPPED(ctrl_ctx, i))
+ continue;
+
+ /* Drop the new copies of any added or changed endpoints from
+ * the interval table.
+ */
+ if (EP_IS_ADDED(ctrl_ctx, i)) {
+ xhci_drop_ep_from_interval_table(xhci,
+ &virt_dev->eps[i].bw_info,
+ virt_dev->bw_table,
+ virt_dev->udev,
+ &virt_dev->eps[i],
+ virt_dev->tt_info);
+ }
+ /* Revert the endpoint back to its old information */
+ memcpy(&virt_dev->eps[i].bw_info, &ep_bw_info[i],
+ sizeof(ep_bw_info[i]));
+ /* Add any changed or dropped endpoints back into the table */
+ if (EP_IS_DROPPED(ctrl_ctx, i))
+ xhci_add_ep_to_interval_table(xhci,
+ &virt_dev->eps[i].bw_info,
+ virt_dev->bw_table,
+ virt_dev->udev,
+ &virt_dev->eps[i],
+ virt_dev->tt_info);
+ }
+ return -ENOMEM;
+}
+
+
+/* Issue a configure endpoint command or evaluate context command
+ * and wait for it to finish.
+ */
+static int xhci_configure_endpoint(struct xhci_hcd *xhci,
+ struct usb_device *udev,
+ struct xhci_command *command,
+ bool ctx_change, bool must_succeed)
+{
+ int ret;
+ int timeleft;
+ unsigned long flags;
+ struct xhci_container_ctx *in_ctx;
+ struct completion *cmd_completion;
+ u32 *cmd_status;
+ struct xhci_virt_device *virt_dev;
+
+ spin_lock_irqsave(&xhci->lock, flags);
+ virt_dev = xhci->devs[udev->slot_id];
+
+ if (command)
+ in_ctx = command->in_ctx;
+ else
+ in_ctx = virt_dev->in_ctx;
+
+ if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK) &&
+ xhci_reserve_host_resources(xhci, in_ctx)) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_warn(xhci, "Not enough host resources, "
+ "active endpoint contexts = %u\n",
+ xhci->num_active_eps);
+ return -ENOMEM;
+ }
+ if ((xhci->quirks & XHCI_SW_BW_CHECKING) &&
+ xhci_reserve_bandwidth(xhci, virt_dev, in_ctx)) {
+ if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK))
+ xhci_free_host_resources(xhci, in_ctx);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_warn(xhci, "Not enough bandwidth\n");
+ return -ENOMEM;
+ }
+
+ if (command) {
+ cmd_completion = command->completion;
+ cmd_status = &command->status;
+ command->command_trb = xhci->cmd_ring->enqueue;
+
+ /* Enqueue pointer can be left pointing to the link TRB,
+ * we must handle that
+ */
+ if (TRB_TYPE_LINK_LE32(command->command_trb->link.control))
+ command->command_trb =
+ xhci->cmd_ring->enq_seg->next->trbs;
+
+ list_add_tail(&command->cmd_list, &virt_dev->cmd_list);
+ } else {
+ cmd_completion = &virt_dev->cmd_completion;
+ cmd_status = &virt_dev->cmd_status;
+ }
+ init_completion(cmd_completion);
+
+ if (!ctx_change)
+ ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma,
+ udev->slot_id, must_succeed);
+ else
+ ret = xhci_queue_evaluate_context(xhci, in_ctx->dma,
+ udev->slot_id);
+ if (ret < 0) {
+ if (command)
+ list_del(&command->cmd_list);
+ if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK))
+ xhci_free_host_resources(xhci, in_ctx);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_dbg(xhci, "FIXME allocate a new ring segment\n");
+ return -ENOMEM;
+ }
+ xhci_ring_cmd_db(xhci);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+
+ /* Wait for the configure endpoint command to complete */
+ timeleft = wait_for_completion_interruptible_timeout(
+ cmd_completion,
+ USB_CTRL_SET_TIMEOUT);
+ if (timeleft <= 0) {
+ xhci_warn(xhci, "%s while waiting for %s command\n",
+ timeleft == 0 ? "Timeout" : "Signal",
+ ctx_change == 0 ?
+ "configure endpoint" :
+ "evaluate context");
+ /* FIXME cancel the configure endpoint command */
+ return -ETIME;
+ }
+
+ if (!ctx_change)
+ ret = xhci_configure_endpoint_result(xhci, udev, cmd_status);
+ else
+ ret = xhci_evaluate_context_result(xhci, udev, cmd_status);
+
+ if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) {
+ spin_lock_irqsave(&xhci->lock, flags);
+ /* If the command failed, remove the reserved resources.
+ * Otherwise, clean up the estimate to include dropped eps.
+ */
+ if (ret)
+ xhci_free_host_resources(xhci, in_ctx);
+ else
+ xhci_finish_resource_reservation(xhci, in_ctx);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ }
+ return ret;
+}
+
+/* Called after one or more calls to xhci_add_endpoint() or
+ * xhci_drop_endpoint(). If this call fails, the USB core is expected
+ * to call xhci_reset_bandwidth().
+ *
+ * Since we are in the middle of changing either configuration or
+ * installing a new alt setting, the USB core won't allow URBs to be
+ * enqueued for any endpoint on the old config or interface. Nothing
+ * else should be touching the xhci->devs[slot_id] structure, so we
+ * don't need to take the xhci->lock for manipulating that.
+ */
+int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
{
int i;
int ret = 0;
if (ret <= 0)
return ret;
xhci = hcd_to_xhci(hcd);
+ if (xhci->xhc_state & XHCI_STATE_DYING)
+ return -ENODEV;
xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
virt_dev = xhci->devs[udev->slot_id];
/* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */
ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx);
- ctrl_ctx->add_flags |= SLOT_FLAG;
- ctrl_ctx->add_flags &= ~EP0_FLAG;
- ctrl_ctx->drop_flags &= ~SLOT_FLAG;
- ctrl_ctx->drop_flags &= ~EP0_FLAG;
+ ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG);
+ ctrl_ctx->add_flags &= cpu_to_le32(~EP0_FLAG);
+ ctrl_ctx->drop_flags &= cpu_to_le32(~(SLOT_FLAG | EP0_FLAG));
+
+ /* Don't issue the command if there's no endpoints to update. */
+ if (ctrl_ctx->add_flags == cpu_to_le32(SLOT_FLAG) &&
+ ctrl_ctx->drop_flags == 0)
+ return 0;
+
xhci_dbg(xhci, "New Input Control Context:\n");
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
xhci_dbg_ctx(xhci, virt_dev->in_ctx,
- LAST_CTX_TO_EP_NUM(slot_ctx->dev_info));
+ LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info)));
ret = xhci_configure_endpoint(xhci, udev, NULL,
false, false);
xhci_dbg(xhci, "Output context after successful config ep cmd:\n");
xhci_dbg_ctx(xhci, virt_dev->out_ctx,
- LAST_CTX_TO_EP_NUM(slot_ctx->dev_info));
+ LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info)));
+ /* Free any rings that were dropped, but not changed. */
+ for (i = 1; i < 31; ++i) {
+ if ((le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1))) &&
+ !(le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1))))
+ xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i);
+ }
xhci_zero_in_ctx(xhci, virt_dev);
- /* Install new rings and free or cache any old rings */
+ /*
+ * Install any rings for completely new endpoints or changed endpoints,
+ * and free or cache any old rings from changed endpoints.
+ */
for (i = 1; i < 31; ++i) {
if (!virt_dev->eps[i].new_ring)
continue;
{
struct xhci_input_control_ctx *ctrl_ctx;
ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx);
- ctrl_ctx->add_flags = add_flags;
- ctrl_ctx->drop_flags = drop_flags;
+ ctrl_ctx->add_flags = cpu_to_le32(add_flags);
+ ctrl_ctx->drop_flags = cpu_to_le32(drop_flags);
xhci_slot_copy(xhci, in_ctx, out_ctx);
- ctrl_ctx->add_flags |= SLOT_FLAG;
+ ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG);
xhci_dbg(xhci, "Input Context:\n");
xhci_dbg_ctx(xhci, in_ctx, xhci_last_valid_endpoint(add_flags));
}
-void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci,
+static void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci,
unsigned int slot_id, unsigned int ep_index,
struct xhci_dequeue_state *deq_state)
{
deq_state->new_deq_ptr);
return;
}
- ep_ctx->deq = addr | deq_state->new_cycle_state;
+ ep_ctx->deq = cpu_to_le64(addr | deq_state->new_cycle_state);
added_ctxs = xhci_get_endpoint_flag_from_index(ep_index);
xhci_setup_input_ctx_for_config_ep(xhci, xhci->devs[slot_id]->in_ctx,
if (ret < 0)
return ret;
- max_streams = USB_SS_MAX_STREAMS(
- eps[i]->ss_ep_comp.bmAttributes);
+ max_streams = usb_ss_max_streams(&eps[i]->ss_ep_comp);
if (max_streams < (*num_streams - 1)) {
xhci_dbg(xhci, "Ep 0x%x only supports %u stream IDs.\n",
eps[i]->desc.bEndpointAddress,
return -EINVAL;
}
vdev = xhci->devs[udev->slot_id];
- /* Mark each endpoint as being in transistion, so
+ /* Mark each endpoint as being in transition, so
* xhci_urb_enqueue() will reject all URBs.
*/
for (i = 0; i < num_eps; i++) {
}
/*
+ * Deletes endpoint resources for endpoints that were active before a Reset
+ * Device command, or a Disable Slot command. The Reset Device command leaves
+ * the control endpoint intact, whereas the Disable Slot command deletes it.
+ *
+ * Must be called with xhci->lock held.
+ */
+void xhci_free_device_endpoint_resources(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev, bool drop_control_ep)
+{
+ int i;
+ unsigned int num_dropped_eps = 0;
+ unsigned int drop_flags = 0;
+
+ for (i = (drop_control_ep ? 0 : 1); i < 31; i++) {
+ if (virt_dev->eps[i].ring) {
+ drop_flags |= 1 << i;
+ num_dropped_eps++;
+ }
+ }
+ xhci->num_active_eps -= num_dropped_eps;
+ if (num_dropped_eps)
+ xhci_dbg(xhci, "Dropped %u ep ctxs, flags = 0x%x, "
+ "%u now active.\n",
+ num_dropped_eps, drop_flags,
+ xhci->num_active_eps);
+}
+
+/*
* This submits a Reset Device Command, which will set the device state to 0,
* set the device address to 0, and disable all the endpoints except the default
* control endpoint. The USB core should come back and call
struct xhci_command *reset_device_cmd;
int timeleft;
int last_freed_endpoint;
+ struct xhci_slot_ctx *slot_ctx;
+ int old_active_eps = 0;
ret = xhci_check_args(hcd, udev, NULL, 0, false, __func__);
if (ret <= 0)
return -EINVAL;
}
+ /* If device is not setup, there is no point in resetting it */
+ slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx);
+ if (GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state)) ==
+ SLOT_STATE_DISABLED)
+ return 0;
+
xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id);
/* Allocate the command structure that holds the struct completion.
* Assume we're in process context, since the normal device reset
/* Enqueue pointer can be left pointing to the link TRB,
* we must handle that
*/
- if ((reset_device_cmd->command_trb->link.control & TRB_TYPE_BITMASK)
- == TRB_TYPE(TRB_LINK))
+ if (TRB_TYPE_LINK_LE32(reset_device_cmd->command_trb->link.control))
reset_device_cmd->command_trb =
xhci->cmd_ring->enq_seg->next->trbs;
goto command_cleanup;
}
+ /* Free up host controller endpoint resources */
+ if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) {
+ spin_lock_irqsave(&xhci->lock, flags);
+ /* Don't delete the default control endpoint resources */
+ xhci_free_device_endpoint_resources(xhci, virt_dev, false);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ }
+
/* Everything but endpoint 0 is disabled, so free or cache the rings. */
last_freed_endpoint = 1;
for (i = 1; i < 31; ++i) {
- if (!virt_dev->eps[i].ring)
- continue;
- xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i);
- last_freed_endpoint = i;
- }
+ struct xhci_virt_ep *ep = &virt_dev->eps[i];
+
+ if (ep->ep_state & EP_HAS_STREAMS) {
+ xhci_free_stream_info(xhci, ep->stream_info);
+ ep->stream_info = NULL;
+ ep->ep_state &= ~EP_HAS_STREAMS;
+ }
+
+ if (ep->ring) {
+ xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i);
+ last_freed_endpoint = i;
+ }
+ if (!list_empty(&virt_dev->eps[i].bw_endpoint_list))
+ xhci_drop_ep_from_interval_table(xhci,
+ &virt_dev->eps[i].bw_info,
+ virt_dev->bw_table,
+ udev,
+ &virt_dev->eps[i],
+ virt_dev->tt_info);
+ xhci_clear_endpoint_bw_info(&virt_dev->eps[i].bw_info);
+ }
+ /* If necessary, update the number of active TTs on this root port */
+ xhci_update_tt_active_eps(xhci, virt_dev, old_active_eps);
+
xhci_dbg(xhci, "Output context after successful reset device cmd:\n");
xhci_dbg_ctx(xhci, virt_dev->out_ctx, last_freed_endpoint);
ret = 0;
int i, ret;
ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
- if (ret <= 0)
+ /* If the host is halted due to driver unload, we still need to free the
+ * device.
+ */
+ if (ret <= 0 && ret != -ENODEV)
return;
virt_dev = xhci->devs[udev->slot_id];
del_timer_sync(&virt_dev->eps[i].stop_cmd_timer);
}
+ if (udev->usb2_hw_lpm_enabled) {
+ xhci_set_usb2_hardware_lpm(hcd, udev, 0);
+ udev->usb2_hw_lpm_enabled = 0;
+ }
+
spin_lock_irqsave(&xhci->lock, flags);
/* Don't disable the slot if the host controller is dead. */
state = xhci_readl(xhci, &xhci->op_regs->status);
- if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) {
+ if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) ||
+ (xhci->xhc_state & XHCI_STATE_HALTED)) {
xhci_free_virt_device(xhci, udev->slot_id);
spin_unlock_irqrestore(&xhci->lock, flags);
return;
}
/*
+ * Checks if we have enough host controller resources for the default control
+ * endpoint.
+ *
+ * Must be called with xhci->lock held.
+ */
+static int xhci_reserve_host_control_ep_resources(struct xhci_hcd *xhci)
+{
+ if (xhci->num_active_eps + 1 > xhci->limit_active_eps) {
+ xhci_dbg(xhci, "Not enough ep ctxs: "
+ "%u active, need to add 1, limit is %u.\n",
+ xhci->num_active_eps, xhci->limit_active_eps);
+ return -ENOMEM;
+ }
+ xhci->num_active_eps += 1;
+ xhci_dbg(xhci, "Adding 1 ep ctx, %u now active.\n",
+ xhci->num_active_eps);
+ return 0;
+}
+
+
+/*
* Returns 0 if the xHC ran out of device slots, the Enable Slot command
* timed out, or allocating memory failed. Returns 1 on success.
*/
xhci_err(xhci, "Error while assigning device slot ID\n");
return 0;
}
- /* xhci_alloc_virt_device() does not touch rings; no need to lock.
- * Use GFP_NOIO, since this function can be called from
+
+ if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) {
+ spin_lock_irqsave(&xhci->lock, flags);
+ ret = xhci_reserve_host_control_ep_resources(xhci);
+ if (ret) {
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ xhci_warn(xhci, "Not enough host resources, "
+ "active endpoint contexts = %u\n",
+ xhci->num_active_eps);
+ goto disable_slot;
+ }
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ }
+ /* Use GFP_NOIO, since this function can be called from
* xhci_discover_or_reset_device(), which may be called as part of
* mass storage driver error handling.
*/
if (!xhci_alloc_virt_device(xhci, xhci->slot_id, udev, GFP_NOIO)) {
- /* Disable slot, if we can do it without mem alloc */
xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n");
- spin_lock_irqsave(&xhci->lock, flags);
- if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id))
- xhci_ring_cmd_db(xhci);
- spin_unlock_irqrestore(&xhci->lock, flags);
- return 0;
+ goto disable_slot;
}
udev->slot_id = xhci->slot_id;
/* Is this a LS or FS device under a HS hub? */
/* Hub or peripherial? */
return 1;
+
+disable_slot:
+ /* Disable slot, if we can do it without mem alloc */
+ spin_lock_irqsave(&xhci->lock, flags);
+ if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id))
+ xhci_ring_cmd_db(xhci);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return 0;
}
/*
virt_dev = xhci->devs[udev->slot_id];
+ if (WARN_ON(!virt_dev)) {
+ /*
+ * In plug/unplug torture test with an NEC controller,
+ * a zero-dereference was observed once due to virt_dev = 0.
+ * Print useful debug rather than crash if it is observed again!
+ */
+ xhci_warn(xhci, "Virt dev invalid for slot_id 0x%x!\n",
+ udev->slot_id);
+ return -EINVAL;
+ }
+
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
/*
* If this is the first Set Address since device plug-in or
/* Otherwise, update the control endpoint ring enqueue pointer. */
else
xhci_copy_ep0_dequeue_into_input_ctx(xhci, udev);
+ ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx);
+ ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG | EP0_FLAG);
+ ctrl_ctx->drop_flags = 0;
+
xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id);
xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2);
* command on a timeout.
*/
if (timeleft <= 0) {
- xhci_warn(xhci, "%s while waiting for a slot\n",
+ xhci_warn(xhci, "%s while waiting for address device command\n",
timeleft == 0 ? "Timeout" : "Signal");
/* FIXME cancel the address device command */
return -ETIME;
dev_warn(&udev->dev, "Device not responding to set address.\n");
ret = -EPROTO;
break;
+ case COMP_DEV_ERR:
+ dev_warn(&udev->dev, "ERROR: Incompatible device for address "
+ "device command.\n");
+ ret = -ENODEV;
+ break;
case COMP_SUCCESS:
xhci_dbg(xhci, "Successful Address Device command\n");
break;
temp_64 = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr);
xhci_dbg(xhci, "Op regs DCBAA ptr = %#016llx\n", temp_64);
xhci_dbg(xhci, "Slot ID %d dcbaa entry @%p = %#016llx\n",
- udev->slot_id,
- &xhci->dcbaa->dev_context_ptrs[udev->slot_id],
- (unsigned long long)
- xhci->dcbaa->dev_context_ptrs[udev->slot_id]);
+ udev->slot_id,
+ &xhci->dcbaa->dev_context_ptrs[udev->slot_id],
+ (unsigned long long)
+ le64_to_cpu(xhci->dcbaa->dev_context_ptrs[udev->slot_id]));
xhci_dbg(xhci, "Output Context DMA address = %#08llx\n",
(unsigned long long)virt_dev->out_ctx->dma);
xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id);
slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx);
/* Use kernel assigned address for devices; store xHC assigned
* address locally. */
- virt_dev->address = (slot_ctx->dev_state & DEV_ADDR_MASK) + 1;
+ virt_dev->address = (le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK)
+ + 1;
/* Zero the input context control for later use */
- ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx);
ctrl_ctx->add_flags = 0;
ctrl_ctx->drop_flags = 0;
return 0;
}
+#ifdef CONFIG_USB_SUSPEND
+
+/* BESL to HIRD Encoding array for USB2 LPM */
+static int xhci_besl_encoding[16] = {125, 150, 200, 300, 400, 500, 1000, 2000,
+ 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000};
+
+/* Calculate HIRD/BESL for USB2 PORTPMSC*/
+static int xhci_calculate_hird_besl(int u2del, bool use_besl)
+{
+ int hird;
+
+ if (use_besl) {
+ for (hird = 0; hird < 16; hird++) {
+ if (xhci_besl_encoding[hird] >= u2del)
+ break;
+ }
+ } else {
+ if (u2del <= 50)
+ hird = 0;
+ else
+ hird = (u2del - 51) / 75 + 1;
+
+ if (hird > 15)
+ hird = 15;
+ }
+
+ return hird;
+}
+
+static int xhci_usb2_software_lpm_test(struct usb_hcd *hcd,
+ struct usb_device *udev)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct dev_info *dev_info;
+ __le32 __iomem **port_array;
+ __le32 __iomem *addr, *pm_addr;
+ u32 temp, dev_id;
+ unsigned int port_num;
+ unsigned long flags;
+ int u2del, hird;
+ int ret;
+
+ if (hcd->speed == HCD_USB3 || !xhci->sw_lpm_support ||
+ !udev->lpm_capable)
+ return -EINVAL;
+
+ /* we only support lpm for non-hub device connected to root hub yet */
+ if (!udev->parent || udev->parent->parent ||
+ udev->descriptor.bDeviceClass == USB_CLASS_HUB)
+ return -EINVAL;
+
+ spin_lock_irqsave(&xhci->lock, flags);
+
+ /* Look for devices in lpm_failed_devs list */
+ dev_id = le16_to_cpu(udev->descriptor.idVendor) << 16 |
+ le16_to_cpu(udev->descriptor.idProduct);
+ list_for_each_entry(dev_info, &xhci->lpm_failed_devs, list) {
+ if (dev_info->dev_id == dev_id) {
+ ret = -EINVAL;
+ goto finish;
+ }
+ }
+
+ port_array = xhci->usb2_ports;
+ port_num = udev->portnum - 1;
+
+ if (port_num > HCS_MAX_PORTS(xhci->hcs_params1)) {
+ xhci_dbg(xhci, "invalid port number %d\n", udev->portnum);
+ ret = -EINVAL;
+ goto finish;
+ }
+
+ /*
+ * Test USB 2.0 software LPM.
+ * FIXME: some xHCI 1.0 hosts may implement a new register to set up
+ * hardware-controlled USB 2.0 LPM. See section 5.4.11 and 4.23.5.1.1.1
+ * in the June 2011 errata release.
+ */
+ xhci_dbg(xhci, "test port %d software LPM\n", port_num);
+ /*
+ * Set L1 Device Slot and HIRD/BESL.
+ * Check device's USB 2.0 extension descriptor to determine whether
+ * HIRD or BESL shoule be used. See USB2.0 LPM errata.
+ */
+ pm_addr = port_array[port_num] + 1;
+ u2del = HCS_U2_LATENCY(xhci->hcs_params3);
+ if (le32_to_cpu(udev->bos->ext_cap->bmAttributes) & (1 << 2))
+ hird = xhci_calculate_hird_besl(u2del, 1);
+ else
+ hird = xhci_calculate_hird_besl(u2del, 0);
+
+ temp = PORT_L1DS(udev->slot_id) | PORT_HIRD(hird);
+ xhci_writel(xhci, temp, pm_addr);
+
+ /* Set port link state to U2(L1) */
+ addr = port_array[port_num];
+ xhci_set_link_state(xhci, port_array, port_num, XDEV_U2);
+
+ /* wait for ACK */
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ msleep(10);
+ spin_lock_irqsave(&xhci->lock, flags);
+
+ /* Check L1 Status */
+ ret = handshake(xhci, pm_addr, PORT_L1S_MASK, PORT_L1S_SUCCESS, 125);
+ if (ret != -ETIMEDOUT) {
+ /* enter L1 successfully */
+ temp = xhci_readl(xhci, addr);
+ xhci_dbg(xhci, "port %d entered L1 state, port status 0x%x\n",
+ port_num, temp);
+ ret = 0;
+ } else {
+ temp = xhci_readl(xhci, pm_addr);
+ xhci_dbg(xhci, "port %d software lpm failed, L1 status %d\n",
+ port_num, temp & PORT_L1S_MASK);
+ ret = -EINVAL;
+ }
+
+ /* Resume the port */
+ xhci_set_link_state(xhci, port_array, port_num, XDEV_U0);
+
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ msleep(10);
+ spin_lock_irqsave(&xhci->lock, flags);
+
+ /* Clear PLC */
+ xhci_test_and_clear_bit(xhci, port_array, port_num, PORT_PLC);
+
+ /* Check PORTSC to make sure the device is in the right state */
+ if (!ret) {
+ temp = xhci_readl(xhci, addr);
+ xhci_dbg(xhci, "resumed port %d status 0x%x\n", port_num, temp);
+ if (!(temp & PORT_CONNECT) || !(temp & PORT_PE) ||
+ (temp & PORT_PLS_MASK) != XDEV_U0) {
+ xhci_dbg(xhci, "port L1 resume fail\n");
+ ret = -EINVAL;
+ }
+ }
+
+ if (ret) {
+ /* Insert dev to lpm_failed_devs list */
+ xhci_warn(xhci, "device LPM test failed, may disconnect and "
+ "re-enumerate\n");
+ dev_info = kzalloc(sizeof(struct dev_info), GFP_ATOMIC);
+ if (!dev_info) {
+ ret = -ENOMEM;
+ goto finish;
+ }
+ dev_info->dev_id = dev_id;
+ INIT_LIST_HEAD(&dev_info->list);
+ list_add(&dev_info->list, &xhci->lpm_failed_devs);
+ } else {
+ xhci_ring_device(xhci, udev->slot_id);
+ }
+
+finish:
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return ret;
+}
+
+int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
+ struct usb_device *udev, int enable)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ __le32 __iomem **port_array;
+ __le32 __iomem *pm_addr;
+ u32 temp;
+ unsigned int port_num;
+ unsigned long flags;
+ int u2del, hird;
+
+ if (hcd->speed == HCD_USB3 || !xhci->hw_lpm_support ||
+ !udev->lpm_capable)
+ return -EPERM;
+
+ if (!udev->parent || udev->parent->parent ||
+ udev->descriptor.bDeviceClass == USB_CLASS_HUB)
+ return -EPERM;
+
+ if (udev->usb2_hw_lpm_capable != 1)
+ return -EPERM;
+
+ spin_lock_irqsave(&xhci->lock, flags);
+
+ port_array = xhci->usb2_ports;
+ port_num = udev->portnum - 1;
+ pm_addr = port_array[port_num] + 1;
+ temp = xhci_readl(xhci, pm_addr);
+
+ xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n",
+ enable ? "enable" : "disable", port_num);
+
+ u2del = HCS_U2_LATENCY(xhci->hcs_params3);
+ if (le32_to_cpu(udev->bos->ext_cap->bmAttributes) & (1 << 2))
+ hird = xhci_calculate_hird_besl(u2del, 1);
+ else
+ hird = xhci_calculate_hird_besl(u2del, 0);
+
+ if (enable) {
+ temp &= ~PORT_HIRD_MASK;
+ temp |= PORT_HIRD(hird) | PORT_RWE;
+ xhci_writel(xhci, temp, pm_addr);
+ temp = xhci_readl(xhci, pm_addr);
+ temp |= PORT_HLE;
+ xhci_writel(xhci, temp, pm_addr);
+ } else {
+ temp &= ~(PORT_HLE | PORT_RWE | PORT_HIRD_MASK);
+ xhci_writel(xhci, temp, pm_addr);
+ }
+
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return 0;
+}
+
+int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ int ret;
+
+ ret = xhci_usb2_software_lpm_test(hcd, udev);
+ if (!ret) {
+ xhci_dbg(xhci, "software LPM test succeed\n");
+ if (xhci->hw_lpm_support == 1) {
+ udev->usb2_hw_lpm_capable = 1;
+ ret = xhci_set_usb2_hardware_lpm(hcd, udev, 1);
+ if (!ret)
+ udev->usb2_hw_lpm_enabled = 1;
+ }
+ }
+
+ return 0;
+}
+
+#else
+
+int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
+ struct usb_device *udev, int enable)
+{
+ return 0;
+}
+
+int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+ return 0;
+}
+
+#endif /* CONFIG_USB_SUSPEND */
+
/* Once a hub descriptor is fetched for a device, we need to update the xHC's
* internal data structures for the device.
*/
}
spin_lock_irqsave(&xhci->lock, flags);
+ if (hdev->speed == USB_SPEED_HIGH &&
+ xhci_alloc_tt_info(xhci, vdev, hdev, tt, GFP_ATOMIC)) {
+ xhci_dbg(xhci, "Could not allocate xHCI TT structure.\n");
+ xhci_free_command(xhci, config_cmd);
+ spin_unlock_irqrestore(&xhci->lock, flags);
+ return -ENOMEM;
+ }
+
xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx);
ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx);
- ctrl_ctx->add_flags |= SLOT_FLAG;
+ ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG);
slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx);
- slot_ctx->dev_info |= DEV_HUB;
+ slot_ctx->dev_info |= cpu_to_le32(DEV_HUB);
if (tt->multi)
- slot_ctx->dev_info |= DEV_MTT;
+ 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",
(unsigned int) xhci->hci_version);
- slot_ctx->dev_info2 |= XHCI_MAX_PORTS(hdev->maxchild);
+ slot_ctx->dev_info2 |= cpu_to_le32(XHCI_MAX_PORTS(hdev->maxchild));
/* Set TT think time - convert from ns to FS bit times.
* 0 = 8 FS bit times, 1 = 16 FS bit times,
* 2 = 24 FS bit times, 3 = 32 FS bit times.
+ *
+ * xHCI 1.0: this field shall be 0 if the device is not a
+ * High-spped hub.
*/
think_time = tt->think_time;
if (think_time != 0)
think_time = (think_time / 666) - 1;
- slot_ctx->tt_info |= TT_THINK_TIME(think_time);
+ if (xhci->hci_version < 0x100 || hdev->speed == USB_SPEED_HIGH)
+ slot_ctx->tt_info |=
+ cpu_to_le32(TT_THINK_TIME(think_time));
} else {
xhci_dbg(xhci, "xHCI version %x doesn't need hub "
"TT think time or number of ports\n",
return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3;
}
+int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
+{
+ struct xhci_hcd *xhci;
+ struct device *dev = hcd->self.controller;
+ int retval;
+ u32 temp;
+
+ hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 2;
+
+ 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->speed = HCD_USB2;
+ hcd->self.root_hub->speed = USB_SPEED_HIGH;
+ /*
+ * USB 2.0 roothub under xHCI has an integrated TT,
+ * (rate matching hub) as opposed to having an OHCI/UHCI
+ * companion controller.
+ */
+ hcd->has_tt = 1;
+ } else {
+ /* xHCI private pointer was set in xhci_pci_probe for the second
+ * registered roothub.
+ */
+ xhci = hcd_to_xhci(hcd);
+ temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+ if (HCC_64BIT_ADDR(temp)) {
+ xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n");
+ dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64));
+ } else {
+ dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32));
+ }
+ return 0;
+ }
+
+ xhci->cap_regs = hcd->regs;
+ xhci->op_regs = hcd->regs +
+ HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
+ xhci->run_regs = hcd->regs +
+ (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK);
+ /* Cache read-only capability registers */
+ xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
+ xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
+ xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
+ xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
+ xhci->hci_version = HC_VERSION(xhci->hcc_params);
+ xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+ xhci_print_registers(xhci);
+
+ get_quirks(dev, xhci);
+
+ /* Make sure the HC is halted. */
+ retval = xhci_halt(xhci);
+ if (retval)
+ goto error;
+
+ xhci_dbg(xhci, "Resetting HCD\n");
+ /* Reset the internal HC memory state and registers. */
+ retval = xhci_reset(xhci);
+ if (retval)
+ goto error;
+ xhci_dbg(xhci, "Reset complete\n");
+
+ temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+ if (HCC_64BIT_ADDR(temp)) {
+ xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n");
+ dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64));
+ } else {
+ dma_set_mask(hcd->self.controller, 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;
+ xhci_dbg(xhci, "Called HCD init\n");
+ return 0;
+error:
+ kfree(xhci);
+ return retval;
+}
+
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_LICENSE("GPL");
static int __init xhci_hcd_init(void)
{
-#ifdef CONFIG_PCI
- int retval = 0;
+ int retval;
retval = xhci_register_pci();
-
if (retval < 0) {
printk(KERN_DEBUG "Problem registering PCI driver.");
return retval;
}
-#endif
/*
* Check the compiler generated sizes of structures that must be laid
* out in specific ways for hardware access.
static void __exit xhci_hcd_cleanup(void)
{
-#ifdef CONFIG_PCI
xhci_unregister_pci();
-#endif
}
module_exit(xhci_hcd_cleanup);
projects / linux-flexiantxendom0.git / blobdiff