[PATCH 5.15 195/245] xhci: move port specific items such as state completions to port structure

Greg Kroah-Hartman
2024-02-27T14:09:52Z

From: Mathias Nyman <mathias.nyman@linux.intel.com>

[ Upstream commit 2996e9fc00c378987c18ecbafe5624581b18c0d6 ]

Now that we have a port structure for each port it makes sense to
move per port variables, timestamps and completions there.
Get rid of storing bitfileds and arrays of port specific items per bus.

Move
unsigned long resume_done;
insigned long rexit_ports
struct completion rexit_done;
struct completion u3exit_done;

Rename rexit_ports to rexit_active, and remove a redundant hcd
speed check while checking if rexit_active is set.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230202150505.618915-8-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: d7cdfc319b2b ("xhci: track port suspend state correctly in unsuccessful resume cases")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/usb/host/xhci-hub.c | 31 +++++++++++++++----------------
drivers/usb/host/xhci-mem.c | 10 +++-------
drivers/usb/host/xhci-ring.c | 13 ++++++-------
drivers/usb/host/xhci.h | 9 ++++-----
4 files changed, 28 insertions(+), 35 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 3526665575af2..7f0c9176b4951 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -924,7 +924,7 @@ static int xhci_handle_usb2_port_link_resume(struct xhci_port *port,
return -EINVAL;
}
/* did port event handler already start resume timing? */
- if (!bus_state->resume_done[wIndex]) {
+ if (!port->resume_done) {
/* If not, maybe we are in a host initated resume? */
if (test_bit(wIndex, &bus_state->resuming_ports)) {
/* Host initated resume doesn't time the resume
@@ -941,28 +941,27 @@ static int xhci_handle_usb2_port_link_resume(struct xhci_port *port,
msecs_to_jiffies(USB_RESUME_TIMEOUT);

set_bit(wIndex, &bus_state->resuming_ports);
- bus_state->resume_done[wIndex] = timeout;
+ port->resume_done = timeout;
mod_timer(&hcd->rh_timer, timeout);
usb_hcd_start_port_resume(&hcd->self, wIndex);
}
/* Has resume been signalled for USB_RESUME_TIME yet? */
- } else if (time_after_eq(jiffies, bus_state->resume_done[wIndex])) {
+ } else if (time_after_eq(jiffies, port->resume_done)) {
int time_left;

xhci_dbg(xhci, "resume USB2 port %d-%d\n",
hcd->self.busnum, wIndex + 1);

- bus_state->resume_done[wIndex] = 0;
+ port->resume_done = 0;
clear_bit(wIndex, &bus_state->resuming_ports);
-
- set_bit(wIndex, &bus_state->rexit_ports);
+ port->rexit_active = true;

xhci_test_and_clear_bit(xhci, port, PORT_PLC);
xhci_set_link_state(xhci, port, XDEV_U0);

spin_unlock_irqrestore(&xhci->lock, *flags);
time_left = wait_for_completion_timeout(
- &bus_state->rexit_done[wIndex],
+ &port->rexit_done,
msecs_to_jiffies(XHCI_MAX_REXIT_TIMEOUT_MS));
spin_lock_irqsave(&xhci->lock, *flags);

@@ -981,7 +980,7 @@ static int xhci_handle_usb2_port_link_resume(struct xhci_port *port,
xhci_warn(xhci, "Port resume timed out, port %d-%d: 0x%x\n",
hcd->self.busnum, wIndex + 1, port_status);
*status |= USB_PORT_STAT_SUSPEND;
- clear_bit(wIndex, &bus_state->rexit_ports);
+ port->rexit_active = false;
}

usb_hcd_end_port_resume(&hcd->self, wIndex);
@@ -1088,10 +1087,10 @@ static void xhci_get_usb2_port_status(struct xhci_port *port, u32 *status,
if (link_state == XDEV_U2)
*status |= USB_PORT_STAT_L1;
if (link_state == XDEV_U0) {
- if (bus_state->resume_done[portnum])
+ if (port->resume_done)
usb_hcd_end_port_resume(&port->rhub->hcd->self,
portnum);
- bus_state->resume_done[portnum] = 0;
+ port->resume_done = 0;
clear_bit(portnum, &bus_state->resuming_ports);
if (bus_state->suspended_ports & (1 << portnum)) {
bus_state->suspended_ports &= ~(1 << portnum);
@@ -1163,11 +1162,11 @@ static u32 xhci_get_port_status(struct usb_hcd *hcd,
* Clear stale usb2 resume signalling variables in case port changed
* state during resume signalling. For example on error
*/
- if ((bus_state->resume_done[wIndex] ||
+ if ((port->resume_done ||
test_bit(wIndex, &bus_state->resuming_ports)) &&
(raw_port_status & PORT_PLS_MASK) != XDEV_U3 &&
(raw_port_status & PORT_PLS_MASK) != XDEV_RESUME) {
- bus_state->resume_done[wIndex] = 0;
+ port->resume_done = 0;
clear_bit(wIndex, &bus_state->resuming_ports);
usb_hcd_end_port_resume(&hcd->self, wIndex);
}
@@ -1426,7 +1425,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
pls == XDEV_RESUME ||
pls == XDEV_RECOVERY) {
wait_u0 = true;
- reinit_completion(&bus_state->u3exit_done[wIndex]);
+ reinit_completion(&port->u3exit_done);
}
if (pls <= XDEV_U3) /* U1, U2, U3 */
xhci_set_link_state(xhci, port, USB_SS_PORT_LS_U0);
@@ -1436,7 +1435,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
break;
}
spin_unlock_irqrestore(&xhci->lock, flags);
- if (!wait_for_completion_timeout(&bus_state->u3exit_done[wIndex],
+ if (!wait_for_completion_timeout(&port->u3exit_done,
msecs_to_jiffies(500)))
xhci_dbg(xhci, "missing U0 port change event for port %d-%d\n",
hcd->self.busnum, portnum1);
@@ -1675,8 +1674,8 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)

if ((temp & mask) != 0 ||
(bus_state->port_c_suspend & 1 << i) ||
- (bus_state->resume_done[i] && time_after_eq(
- jiffies, bus_state->resume_done[i]))) {
+ (ports[i]->resume_done && time_after_eq(
+ jiffies, ports[i]->resume_done))) {
buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
status = 1;
}
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 6444aef33cf08..f9e3aed40984b 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2318,6 +2318,9 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags)
xhci->hw_ports[i].addr = &xhci->op_regs->port_status_base +
NUM_PORT_REGS * i;
xhci->hw_ports[i].hw_portnum = i;
+
+ init_completion(&xhci->hw_ports[i].rexit_done);
+ init_completion(&xhci->hw_ports[i].u3exit_done);
}

xhci->rh_bw = kcalloc_node(num_ports, sizeof(*xhci->rh_bw), flags,
@@ -2587,13 +2590,6 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
*/
for (i = 0; i < MAX_HC_SLOTS; i++)
xhci->devs[i] = NULL;
- for (i = 0; i < USB_MAXCHILDREN; i++) {
- xhci->usb2_rhub.bus_state.resume_done[i] = 0;
- xhci->usb3_rhub.bus_state.resume_done[i] = 0;
- /* Only the USB 2.0 completions will ever be used. */
- init_completion(&xhci->usb2_rhub.bus_state.rexit_done[i]);
- init_completion(&xhci->usb3_rhub.bus_state.u3exit_done[i]);
- }

if (scratchpad_alloc(xhci, flags))
goto fail;
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 945ed5f3e8588..8038dced215c7 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1987,7 +1987,7 @@ static void handle_port_status(struct xhci_hcd *xhci,
goto cleanup;
} else if (!test_bit(hcd_portnum, &bus_state->resuming_ports)) {
xhci_dbg(xhci, "resume HS port %d\n", port_id);
- bus_state->resume_done[hcd_portnum] = jiffies +
+ port->resume_done = jiffies +
msecs_to_jiffies(USB_RESUME_TIMEOUT);
set_bit(hcd_portnum, &bus_state->resuming_ports);
/* Do the rest in GetPortStatus after resume time delay.
@@ -1996,7 +1996,7 @@ static void handle_port_status(struct xhci_hcd *xhci,
*/
set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
mod_timer(&hcd->rh_timer,
- bus_state->resume_done[hcd_portnum]);
+ port->resume_done);
usb_hcd_start_port_resume(&hcd->self, hcd_portnum);
bogus_port_status = true;
}
@@ -2008,7 +2008,7 @@ static void handle_port_status(struct xhci_hcd *xhci,
(portsc & PORT_PLS_MASK) == XDEV_U1 ||
(portsc & PORT_PLS_MASK) == XDEV_U2)) {
xhci_dbg(xhci, "resume SS port %d finished\n", port_id);
- complete(&bus_state->u3exit_done[hcd_portnum]);
+ complete(&port->u3exit_done);
/* We've just brought the device into U0/1/2 through either the
* Resume state after a device remote wakeup, or through the
* U3Exit state after a host-initiated resume. If it's a device
@@ -2033,10 +2033,9 @@ static void handle_port_status(struct xhci_hcd *xhci,
* RExit to a disconnect state). If so, let the the driver know it's
* out of the RExit state.
*/
- if (!DEV_SUPERSPEED_ANY(portsc) && hcd->speed < HCD_USB3 &&
- test_and_clear_bit(hcd_portnum,
- &bus_state->rexit_ports)) {
- complete(&bus_state->rexit_done[hcd_portnum]);
+ if (hcd->speed < HCD_USB3 && port->rexit_active) {
+ complete(&port->rexit_done);
+ port->rexit_active = false;
bogus_port_status = true;
goto cleanup;
}
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 64278cd77f988..22ffbeaa51eb6 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1708,13 +1708,8 @@ struct xhci_bus_state {
u32 port_c_suspend;
u32 suspended_ports;
u32 port_remote_wakeup;
- unsigned long resume_done[USB_MAXCHILDREN];
/* which ports have started to resume */
unsigned long resuming_ports;
- /* Which ports are waiting on RExit to U0 transition. */
- unsigned long rexit_ports;
- struct completion rexit_done[USB_MAXCHILDREN];
- struct completion u3exit_done[USB_MAXCHILDREN];
};

@@ -1738,6 +1733,10 @@ struct xhci_port {
struct xhci_hub *rhub;
struct xhci_port_cap *port_cap;
unsigned int lpm_incapable:1;
+ unsigned long resume_done;
+ bool rexit_active;
+ struct completion rexit_done;
+ struct completion u3exit_done;
};

struct xhci_hub {
--
2.43.0