xhci: Refactor bus suspend state into a struct.
There are several variables in the xhci_hcd structure that are related to bus suspend and resume state. There are a couple different port status arrays that are accessed by port index. Move those variables into a separate structure, xhci_bus_state. Stash that structure in xhci_hcd. When we have two roothhubs that can be suspended and resumed separately, we can have two xhci_bus_states, and index into the port arrays in each structure with the fake roothub port index (not the real hardware port index). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
parent
5308a91b9f
commit
20b67cf51f
5 changed files with 59 additions and 34 deletions
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@ -291,6 +291,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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u32 __iomem *port_array[15 + USB_MAXCHILDREN];
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int i;
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int slot_id;
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struct xhci_bus_state *bus_state;
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ports = HCS_MAX_PORTS(xhci->hcs_params1);
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for (i = 0; i < ports; i++) {
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@ -300,6 +301,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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port_array[i] =
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xhci->usb2_ports[i - xhci->num_usb3_ports];
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}
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bus_state = &xhci->bus_state[hcd_index(hcd)];
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spin_lock_irqsave(&xhci->lock, flags);
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switch (typeReq) {
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@ -336,10 +338,10 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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if ((temp & PORT_RESET) || !(temp & PORT_PE))
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goto error;
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if (!DEV_SUPERSPEED(temp) && time_after_eq(jiffies,
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xhci->resume_done[wIndex])) {
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bus_state->resume_done[wIndex])) {
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xhci_dbg(xhci, "Resume USB2 port %d\n",
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wIndex + 1);
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xhci->resume_done[wIndex] = 0;
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bus_state->resume_done[wIndex] = 0;
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temp1 = xhci_port_state_to_neutral(temp);
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temp1 &= ~PORT_PLS_MASK;
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temp1 |= PORT_LINK_STROBE | XDEV_U0;
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@ -354,15 +356,15 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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goto error;
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}
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xhci_ring_device(xhci, slot_id);
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xhci->port_c_suspend |= 1 << wIndex;
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xhci->suspended_ports &= ~(1 << wIndex);
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bus_state->port_c_suspend |= 1 << wIndex;
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bus_state->suspended_ports &= ~(1 << wIndex);
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}
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}
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if ((temp & PORT_PLS_MASK) == XDEV_U0
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&& (temp & PORT_POWER)
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&& (xhci->suspended_ports & (1 << wIndex))) {
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xhci->suspended_ports &= ~(1 << wIndex);
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xhci->port_c_suspend |= 1 << wIndex;
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&& (bus_state->suspended_ports & (1 << wIndex))) {
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bus_state->suspended_ports &= ~(1 << wIndex);
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bus_state->port_c_suspend |= 1 << wIndex;
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}
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if (temp & PORT_CONNECT) {
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status |= USB_PORT_STAT_CONNECTION;
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@ -376,7 +378,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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status |= USB_PORT_STAT_RESET;
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if (temp & PORT_POWER)
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status |= USB_PORT_STAT_POWER;
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if (xhci->port_c_suspend & (1 << wIndex))
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if (bus_state->port_c_suspend & (1 << wIndex))
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status |= 1 << USB_PORT_FEAT_C_SUSPEND;
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xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
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put_unaligned(cpu_to_le32(status), (__le32 *) buf);
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@ -422,7 +424,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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spin_lock_irqsave(&xhci->lock, flags);
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temp = xhci_readl(xhci, port_array[wIndex]);
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xhci->suspended_ports |= 1 << wIndex;
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bus_state->suspended_ports |= 1 << wIndex;
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break;
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case USB_PORT_FEAT_POWER:
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/*
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@ -493,7 +495,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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xhci_writel(xhci, temp,
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port_array[wIndex]);
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}
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xhci->port_c_suspend |= 1 << wIndex;
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bus_state->port_c_suspend |= 1 << wIndex;
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}
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slot_id = xhci_find_slot_id_by_port(xhci, wIndex + 1);
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@ -504,7 +506,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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xhci_ring_device(xhci, slot_id);
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break;
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case USB_PORT_FEAT_C_SUSPEND:
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xhci->port_c_suspend &= ~(1 << wIndex);
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bus_state->port_c_suspend &= ~(1 << wIndex);
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case USB_PORT_FEAT_C_RESET:
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case USB_PORT_FEAT_C_CONNECTION:
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case USB_PORT_FEAT_C_OVER_CURRENT:
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@ -546,6 +548,7 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
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struct xhci_hcd *xhci = hcd_to_xhci(hcd);
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int ports;
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u32 __iomem *port_array[15 + USB_MAXCHILDREN];
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struct xhci_bus_state *bus_state;
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ports = HCS_MAX_PORTS(xhci->hcs_params1);
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for (i = 0; i < ports; i++) {
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@ -555,6 +558,7 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
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port_array[i] =
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xhci->usb2_ports[i - xhci->num_usb3_ports];
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}
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bus_state = &xhci->bus_state[hcd_index(hcd)];
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/* Initial status is no changes */
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retval = (ports + 8) / 8;
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@ -568,9 +572,9 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
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for (i = 0; i < ports; i++) {
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temp = xhci_readl(xhci, port_array[i]);
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if ((temp & mask) != 0 ||
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(xhci->port_c_suspend & 1 << i) ||
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(xhci->resume_done[i] && time_after_eq(
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jiffies, xhci->resume_done[i]))) {
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(bus_state->port_c_suspend & 1 << i) ||
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(bus_state->resume_done[i] && time_after_eq(
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jiffies, bus_state->resume_done[i]))) {
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buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
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status = 1;
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}
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@ -587,6 +591,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
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int max_ports, port_index;
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u32 __iomem *port_array[15 + USB_MAXCHILDREN];
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int i;
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struct xhci_bus_state *bus_state;
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unsigned long flags;
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xhci_dbg(xhci, "suspend root hub\n");
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@ -598,13 +603,14 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
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port_array[i] =
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xhci->usb2_ports[i - xhci->num_usb3_ports];
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}
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bus_state = &xhci->bus_state[hcd_index(hcd)];
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spin_lock_irqsave(&xhci->lock, flags);
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if (hcd->self.root_hub->do_remote_wakeup) {
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port_index = max_ports;
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while (port_index--) {
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if (xhci->resume_done[port_index] != 0) {
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if (bus_state->resume_done[port_index] != 0) {
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spin_unlock_irqrestore(&xhci->lock, flags);
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xhci_dbg(xhci, "suspend failed because "
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"port %d is resuming\n",
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@ -615,7 +621,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
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}
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port_index = max_ports;
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xhci->bus_suspended = 0;
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bus_state->bus_suspended = 0;
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while (port_index--) {
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/* suspend the port if the port is not suspended */
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u32 t1, t2;
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@ -635,7 +641,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
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}
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t2 &= ~PORT_PLS_MASK;
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t2 |= PORT_LINK_STROBE | XDEV_U3;
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set_bit(port_index, &xhci->bus_suspended);
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set_bit(port_index, &bus_state->bus_suspended);
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}
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if (hcd->self.root_hub->do_remote_wakeup) {
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if (t1 & PORT_CONNECT) {
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@ -667,7 +673,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
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}
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}
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hcd->state = HC_STATE_SUSPENDED;
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xhci->next_statechange = jiffies + msecs_to_jiffies(10);
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bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
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spin_unlock_irqrestore(&xhci->lock, flags);
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return 0;
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}
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@ -678,6 +684,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
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int max_ports, port_index;
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u32 __iomem *port_array[15 + USB_MAXCHILDREN];
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int i;
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struct xhci_bus_state *bus_state;
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u32 temp;
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unsigned long flags;
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@ -690,8 +697,9 @@ int xhci_bus_resume(struct usb_hcd *hcd)
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port_array[i] =
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xhci->usb2_ports[i - xhci->num_usb3_ports];
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}
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bus_state = &xhci->bus_state[hcd_index(hcd)];
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if (time_before(jiffies, xhci->next_statechange))
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if (time_before(jiffies, bus_state->next_statechange))
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msleep(5);
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spin_lock_irqsave(&xhci->lock, flags);
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@ -717,7 +725,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
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temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
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else
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temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
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if (test_bit(port_index, &xhci->bus_suspended) &&
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if (test_bit(port_index, &bus_state->bus_suspended) &&
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(temp & PORT_PLS_MASK)) {
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if (DEV_SUPERSPEED(temp)) {
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temp = xhci_port_state_to_neutral(temp);
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@ -763,7 +771,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
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(void) xhci_readl(xhci, &xhci->op_regs->command);
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xhci->next_statechange = jiffies + msecs_to_jiffies(5);
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bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
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/* re-enable irqs */
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temp = xhci_readl(xhci, &xhci->op_regs->command);
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temp |= CMD_EIE;
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@ -1451,7 +1451,7 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
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xhci->page_size = 0;
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xhci->page_shift = 0;
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xhci->bus_suspended = 0;
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xhci->bus_state[0].bus_suspended = 0;
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}
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static int xhci_test_trb_in_td(struct xhci_hcd *xhci,
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@ -1971,7 +1971,7 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
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for (i = 0; i < MAX_HC_SLOTS; ++i)
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xhci->devs[i] = NULL;
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for (i = 0; i < USB_MAXCHILDREN; ++i)
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xhci->resume_done[i] = 0;
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xhci->bus_state[0].resume_done[i] = 0;
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if (scratchpad_alloc(xhci, flags))
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goto fail;
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@ -1166,7 +1166,9 @@ static void handle_port_status(struct xhci_hcd *xhci,
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unsigned int faked_port_index;
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u32 __iomem *port_array[15 + USB_MAXCHILDREN];
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int i;
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struct xhci_bus_state *bus_state;
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bus_state = &xhci->bus_state[0];
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/* Port status change events always have a successful completion code */
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if (GET_COMP_CODE(event->generic.field[2]) != COMP_SUCCESS) {
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xhci_warn(xhci, "WARN: xHC returned failed port status event\n");
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xhci_writel(xhci, temp, port_array[faked_port_index]);
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} else {
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xhci_dbg(xhci, "resume HS port %d\n", port_id);
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xhci->resume_done[port_id - 1] = jiffies +
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bus_state->resume_done[port_id - 1] = jiffies +
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msecs_to_jiffies(20);
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mod_timer(&hcd->rh_timer,
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xhci->resume_done[port_id - 1]);
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bus_state->resume_done[port_id - 1]);
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/* Do the rest in GetPortStatus */
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}
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}
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@ -694,7 +694,10 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
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struct usb_hcd *hcd = xhci_to_hcd(xhci);
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int retval;
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if (time_before(jiffies, xhci->next_statechange))
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/* Wait a bit if the bus needs to settle from the transistion to
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* suspend.
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*/
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if (time_before(jiffies, xhci->bus_state[0].next_statechange))
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msleep(100);
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spin_lock_irq(&xhci->lock);
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@ -1161,6 +1161,22 @@ struct s3_save {
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u64 erst_dequeue;
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};
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struct xhci_bus_state {
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unsigned long bus_suspended;
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unsigned long next_statechange;
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/* Port suspend arrays are indexed by the portnum of the fake roothub */
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/* ports suspend status arrays - max 31 ports for USB2, 15 for USB3 */
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u32 port_c_suspend;
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u32 suspended_ports;
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unsigned long resume_done[USB_MAXCHILDREN];
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};
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static inline unsigned int hcd_index(struct usb_hcd *hcd)
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{
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return 0;
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}
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/* There is one ehci_hci structure per controller */
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struct xhci_hcd {
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struct usb_hcd *main_hcd;
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/* Host controller watchdog timer structures */
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unsigned int xhc_state;
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unsigned long bus_suspended;
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unsigned long next_statechange;
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u32 command;
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struct s3_save s3;
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/* Host controller is dying - not responding to commands. "I'm not dead yet!"
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#define XHCI_LINK_TRB_QUIRK (1 << 0)
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#define XHCI_RESET_EP_QUIRK (1 << 1)
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#define XHCI_NEC_HOST (1 << 2)
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/* port suspend change*/
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u32 port_c_suspend;
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/* which ports are suspended */
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u32 suspended_ports;
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unsigned long resume_done[USB_MAXCHILDREN];
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/* There's only one roothub to keep track of bus suspend info for
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* (right now).
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*/
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struct xhci_bus_state bus_state[1];
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/* Is each xHCI roothub port a USB 3.0, USB 2.0, or USB 1.1 port? */
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u8 *port_array;
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/* Array of pointers to USB 3.0 PORTSC registers */
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