1 files changed, 157 insertions, 18 deletions

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index c59d5b5b6c7..c9e419f29b7 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -26,6 +26,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/slab.h>
+#include <linux/dmi.h>
 
 #include "xhci.h"
 
@@ -51,7 +52,7 @@ MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB");
  * handshake done).  There are two failure modes:  "usec" have passed (major
  * hardware flakeout), or the register reads as all-ones (hardware removed).
  */
-static int handshake(struct xhci_hcd *xhci, void __iomem *ptr,
+int handshake(struct xhci_hcd *xhci, void __iomem *ptr,
 		      u32 mask, u32 done, int usec)
 {
 	u32	result;
@@ -104,9 +105,10 @@ int xhci_halt(struct xhci_hcd *xhci)
 
 	ret = handshake(xhci, &xhci->op_regs->status,
 			STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC);
-	if (!ret)
+	if (!ret) {
 		xhci->xhc_state |= XHCI_STATE_HALTED;
-	else
+		xhci->cmd_ring_state = CMD_RING_STATE_STOPPED;
+	} else
 		xhci_warn(xhci, "Host not halted after %u microseconds.\n",
 				XHCI_MAX_HALT_USEC);
 	return ret;
@@ -398,6 +400,98 @@ static void xhci_msix_sync_irqs(struct xhci_hcd *xhci)
 
 #endif
 
+static void compliance_mode_recovery(unsigned long arg)
+{
+	struct xhci_hcd *xhci;
+	struct usb_hcd *hcd;
+	u32 temp;
+	int i;
+
+	xhci = (struct xhci_hcd *)arg;
+
+	for (i = 0; i < xhci->num_usb3_ports; i++) {
+		temp = xhci_readl(xhci, xhci->usb3_ports[i]);
+		if ((temp & PORT_PLS_MASK) == USB_SS_PORT_LS_COMP_MOD) {
+			/*
+			 * Compliance Mode Detected. Letting USB Core
+			 * handle the Warm Reset
+			 */
+			xhci_dbg(xhci, "Compliance Mode Detected->Port %d!\n",
+					i + 1);
+			xhci_dbg(xhci, "Attempting Recovery routine!\n");
+			hcd = xhci->shared_hcd;
+
+			if (hcd->state == HC_STATE_SUSPENDED)
+				usb_hcd_resume_root_hub(hcd);
+
+			usb_hcd_poll_rh_status(hcd);
+		}
+	}
+
+	if (xhci->port_status_u0 != ((1 << xhci->num_usb3_ports)-1))
+		mod_timer(&xhci->comp_mode_recovery_timer,
+			jiffies + msecs_to_jiffies(COMP_MODE_RCVRY_MSECS));
+}
+
+/*
+ * Quirk to work around issue generated by the SN65LVPE502CP USB3.0 re-driver
+ * that causes ports behind that hardware to enter compliance mode sometimes.
+ * The quirk creates a timer that polls every 2 seconds the link state of
+ * each host controller's port and recovers it by issuing a Warm reset
+ * if Compliance mode is detected, otherwise the port will become "dead" (no
+ * device connections or disconnections will be detected anymore). Becasue no
+ * status event is generated when entering compliance mode (per xhci spec),
+ * this quirk is needed on systems that have the failing hardware installed.
+ */
+static void compliance_mode_recovery_timer_init(struct xhci_hcd *xhci)
+{
+	xhci->port_status_u0 = 0;
+	init_timer(&xhci->comp_mode_recovery_timer);
+
+	xhci->comp_mode_recovery_timer.data = (unsigned long) xhci;
+	xhci->comp_mode_recovery_timer.function = compliance_mode_recovery;
+	xhci->comp_mode_recovery_timer.expires = jiffies +
+			msecs_to_jiffies(COMP_MODE_RCVRY_MSECS);
+
+	set_timer_slack(&xhci->comp_mode_recovery_timer,
+			msecs_to_jiffies(COMP_MODE_RCVRY_MSECS));
+	add_timer(&xhci->comp_mode_recovery_timer);
+	xhci_dbg(xhci, "Compliance Mode Recovery Timer Initialized.\n");
+}
+
+/*
+ * This function identifies the systems that have installed the SN65LVPE502CP
+ * USB3.0 re-driver and that need the Compliance Mode Quirk.
+ * Systems:
+ * Vendor: Hewlett-Packard -> System Models: Z420, Z620 and Z820
+ */
+static bool compliance_mode_recovery_timer_quirk_check(void)
+{
+	const char *dmi_product_name, *dmi_sys_vendor;
+
+	dmi_product_name = dmi_get_system_info(DMI_PRODUCT_NAME);
+	dmi_sys_vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+	if (!dmi_product_name || !dmi_sys_vendor)
+		return false;
+
+	if (!(strstr(dmi_sys_vendor, "Hewlett-Packard")))
+		return false;
+
+	if (strstr(dmi_product_name, "Z420") ||
+			strstr(dmi_product_name, "Z620") ||
+			strstr(dmi_product_name, "Z820") ||
+			strstr(dmi_product_name, "Z1"))
+		return true;
+
+	return false;
+}
+
+static int xhci_all_ports_seen_u0(struct xhci_hcd *xhci)
+{
+	return (xhci->port_status_u0 == ((1 << xhci->num_usb3_ports)-1));
+}
+
+
 /*
  * Initialize memory for HCD and xHC (one-time init).
  *
@@ -421,6 +515,12 @@ int xhci_init(struct usb_hcd *hcd)
 	retval = xhci_mem_init(xhci, GFP_KERNEL);
 	xhci_dbg(xhci, "Finished xhci_init\n");
 
+	/* Initializing Compliance Mode Recovery Data If Needed */
+	if (compliance_mode_recovery_timer_quirk_check()) {
+		xhci->quirks |= XHCI_COMP_MODE_QUIRK;
+		compliance_mode_recovery_timer_init(xhci);
+	}
+
 	return retval;
 }
 
@@ -485,6 +585,7 @@ static int xhci_run_finished(struct xhci_hcd *xhci)
 		return -ENODEV;
 	}
 	xhci->shared_hcd->state = HC_STATE_RUNNING;
+	xhci->cmd_ring_state = CMD_RING_STATE_RUNNING;
 
 	if (xhci->quirks & XHCI_NEC_HOST)
 		xhci_ring_cmd_db(xhci);
@@ -629,6 +730,11 @@ void xhci_stop(struct usb_hcd *hcd)
 	del_timer_sync(&xhci->event_ring_timer);
 #endif
 
+	/* Deleting Compliance Mode Recovery Timer */
+	if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) &&
+			(!(xhci_all_ports_seen_u0(xhci))))
+		del_timer_sync(&xhci->comp_mode_recovery_timer);
+
 	if (xhci->quirks & XHCI_AMD_PLL_FIX)
 		usb_amd_dev_put();
 
@@ -659,7 +765,7 @@ void xhci_shutdown(struct usb_hcd *hcd)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 
-	if (xhci->quirks && XHCI_SPURIOUS_REBOOT)
+	if (xhci->quirks & XHCI_SPURIOUS_REBOOT)
 		usb_disable_xhci_ports(to_pci_dev(hcd->self.controller));
 
 	spin_lock_irq(&xhci->lock);
@@ -785,7 +891,7 @@ int xhci_suspend(struct xhci_hcd *xhci)
 	command &= ~CMD_RUN;
 	xhci_writel(xhci, command, &xhci->op_regs->command);
 	if (handshake(xhci, &xhci->op_regs->status,
-		      STS_HALT, STS_HALT, 100*100)) {
+		      STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC)) {
 		xhci_warn(xhci, "WARN: xHC CMD_RUN timeout\n");
 		spin_unlock_irq(&xhci->lock);
 		return -ETIMEDOUT;
@@ -806,6 +912,16 @@ int xhci_suspend(struct xhci_hcd *xhci)
 	}
 	spin_unlock_irq(&xhci->lock);
 
+	/*
+	 * Deleting Compliance Mode Recovery Timer because the xHCI Host
+	 * is about to be suspended.
+	 */
+	if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) &&
+			(!(xhci_all_ports_seen_u0(xhci)))) {
+		del_timer_sync(&xhci->comp_mode_recovery_timer);
+		xhci_dbg(xhci, "Compliance Mode Recovery Timer Deleted!\n");
+	}
+
 	/* step 5: remove core well power */
 	/* synchronize irq when using MSI-X */
 	xhci_msix_sync_irqs(xhci);
@@ -938,6 +1054,16 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 		usb_hcd_resume_root_hub(hcd);
 		usb_hcd_resume_root_hub(xhci->shared_hcd);
 	}
+
+	/*
+	 * If system is subject to the Quirk, Compliance Mode Timer needs to
+	 * be re-initialized Always after a system resume. Ports are subject
+	 * to suffer the Compliance Mode issue again. It doesn't matter if
+	 * ports have entered previously to U0 before system's suspension.
+	 */
+	if (xhci->quirks & XHCI_COMP_MODE_QUIRK)
+		compliance_mode_recovery_timer_init(xhci);
+
 	return retval;
 }
 #endif	/* CONFIG_PM */
@@ -1501,7 +1627,6 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
 	struct xhci_hcd *xhci;
 	struct xhci_container_ctx *in_ctx, *out_ctx;
 	unsigned int ep_index;
-	struct xhci_ep_ctx *ep_ctx;
 	struct xhci_slot_ctx *slot_ctx;
 	struct xhci_input_control_ctx *ctrl_ctx;
 	u32 added_ctxs;
@@ -1537,7 +1662,6 @@ int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
 	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.
@@ -1691,6 +1815,8 @@ static int xhci_evaluate_context_result(struct xhci_hcd *xhci,
 	case COMP_EBADSLT:
 		dev_warn(&udev->dev, "WARN: slot not enabled for"
 				"evaluate context command.\n");
+		ret = -EINVAL;
+		break;
 	case COMP_CTX_STATE:
 		dev_warn(&udev->dev, "WARN: invalid context state for "
 				"evaluate context command.\n");
@@ -1827,7 +1953,7 @@ static void xhci_finish_resource_reservation(struct xhci_hcd *xhci,
 				xhci->num_active_eps);
 }
 
-unsigned int xhci_get_block_size(struct usb_device *udev)
+static unsigned int xhci_get_block_size(struct usb_device *udev)
 {
 	switch (udev->speed) {
 	case USB_SPEED_LOW:
@@ -1845,7 +1971,8 @@ unsigned int xhci_get_block_size(struct usb_device *udev)
 	}
 }
 
-unsigned int xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw)
+static unsigned int
+xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw)
 {
 	if (interval_bw->overhead[LS_OVERHEAD_TYPE])
 		return LS_OVERHEAD;
@@ -2400,6 +2527,7 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
 	struct completion *cmd_completion;
 	u32 *cmd_status;
 	struct xhci_virt_device *virt_dev;
+	union xhci_trb *cmd_trb;
 
 	spin_lock_irqsave(&xhci->lock, flags);
 	virt_dev = xhci->devs[udev->slot_id];
@@ -2445,6 +2573,7 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
 	}
 	init_completion(cmd_completion);
 
+	cmd_trb = xhci->cmd_ring->dequeue;
 	if (!ctx_change)
 		ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma,
 				udev->slot_id, must_succeed);
@@ -2466,14 +2595,17 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
 	/* Wait for the configure endpoint command to complete */
 	timeleft = wait_for_completion_interruptible_timeout(
 			cmd_completion,
-			USB_CTRL_SET_TIMEOUT);
+			XHCI_CMD_DEFAULT_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 */
+		/* cancel the configure endpoint command */
+		ret = xhci_cancel_cmd(xhci, command, cmd_trb);
+		if (ret < 0)
+			return ret;
 		return -ETIME;
 	}
 
@@ -3422,8 +3554,10 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
 	unsigned long flags;
 	int timeleft;
 	int ret;
+	union xhci_trb *cmd_trb;
 
 	spin_lock_irqsave(&xhci->lock, flags);
+	cmd_trb = xhci->cmd_ring->dequeue;
 	ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0);
 	if (ret) {
 		spin_unlock_irqrestore(&xhci->lock, flags);
@@ -3435,12 +3569,12 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
 
 	/* XXX: how much time for xHC slot assignment? */
 	timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev,
-			USB_CTRL_SET_TIMEOUT);
+			XHCI_CMD_DEFAULT_TIMEOUT);
 	if (timeleft <= 0) {
 		xhci_warn(xhci, "%s while waiting for a slot\n",
 				timeleft == 0 ? "Timeout" : "Signal");
-		/* FIXME cancel the enable slot request */
-		return 0;
+		/* cancel the enable slot request */
+		return xhci_cancel_cmd(xhci, NULL, cmd_trb);
 	}
 
 	if (!xhci->slot_id) {
@@ -3501,6 +3635,7 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
 	struct xhci_slot_ctx *slot_ctx;
 	struct xhci_input_control_ctx *ctrl_ctx;
 	u64 temp_64;
+	union xhci_trb *cmd_trb;
 
 	if (!udev->slot_id) {
 		xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id);
@@ -3539,6 +3674,7 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
 	xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2);
 
 	spin_lock_irqsave(&xhci->lock, flags);
+	cmd_trb = xhci->cmd_ring->dequeue;
 	ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma,
 					udev->slot_id);
 	if (ret) {
@@ -3551,7 +3687,7 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
 
 	/* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */
 	timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev,
-			USB_CTRL_SET_TIMEOUT);
+			XHCI_CMD_DEFAULT_TIMEOUT);
 	/* FIXME: From section 4.3.4: "Software shall be responsible for timing
 	 * the SetAddress() "recovery interval" required by USB and aborting the
 	 * command on a timeout.
@@ -3559,7 +3695,10 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
 	if (timeleft <= 0) {
 		xhci_warn(xhci, "%s while waiting for address device command\n",
 				timeleft == 0 ? "Timeout" : "Signal");
-		/* FIXME cancel the address device command */
+		/* cancel the address device command */
+		ret = xhci_cancel_cmd(xhci, NULL, cmd_trb);
+		if (ret < 0)
+			return ret;
 		return -ETIME;
 	}
 
@@ -3882,7 +4021,7 @@ int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
 static unsigned long long xhci_service_interval_to_ns(
 		struct usb_endpoint_descriptor *desc)
 {
-	return (1 << (desc->bInterval - 1)) * 125 * 1000;
+	return (1ULL << (desc->bInterval - 1)) * 125 * 1000;
 }
 
 static u16 xhci_get_timeout_no_hub_lpm(struct usb_device *udev,
@@ -4003,7 +4142,7 @@ static u16 xhci_calculate_intel_u2_timeout(struct usb_device *udev,
 			(xhci_service_interval_to_ns(desc) > timeout_ns))
 		timeout_ns = xhci_service_interval_to_ns(desc);
 
-	u2_del_ns = udev->bos->ss_cap->bU2DevExitLat * 1000;
+	u2_del_ns = le16_to_cpu(udev->bos->ss_cap->bU2DevExitLat) * 1000ULL;
 	if (u2_del_ns > timeout_ns)
 		timeout_ns = u2_del_ns;