Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 518 insertions, 0 deletions

diff --git a/drivers/phy/tegra/xusb.h b/drivers/phy/tegra/xusb.h
new file mode 100644
index 000000000..77609e54d
--- /dev/null
+++ b/drivers/phy/tegra/xusb.h
@@ -0,0 +1,518 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2014-2022, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2015, Google Inc.
+ */
+
+#ifndef __PHY_TEGRA_XUSB_H
+#define __PHY_TEGRA_XUSB_H
+
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/role.h>
+
+/* legacy entry points for backwards-compatibility */
+int tegra_xusb_padctl_legacy_probe(struct platform_device *pdev);
+int tegra_xusb_padctl_legacy_remove(struct platform_device *pdev);
+
+struct phy;
+struct phy_provider;
+struct platform_device;
+struct regulator;
+
+/*
+ * lanes
+ */
+struct tegra_xusb_lane_soc {
+	const char *name;
+
+	unsigned int offset;
+	unsigned int shift;
+	unsigned int mask;
+
+	const char * const *funcs;
+	unsigned int num_funcs;
+
+	struct {
+		unsigned int misc_ctl2;
+	} regs;
+};
+
+struct tegra_xusb_lane {
+	const struct tegra_xusb_lane_soc *soc;
+	struct tegra_xusb_pad *pad;
+	struct device_node *np;
+	struct list_head list;
+	unsigned int function;
+	unsigned int index;
+};
+
+int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
+			     struct device_node *np);
+
+struct tegra_xusb_usb3_lane {
+	struct tegra_xusb_lane base;
+};
+
+static inline struct tegra_xusb_usb3_lane *
+to_usb3_lane(struct tegra_xusb_lane *lane)
+{
+	return container_of(lane, struct tegra_xusb_usb3_lane, base);
+}
+
+struct tegra_xusb_usb2_lane {
+	struct tegra_xusb_lane base;
+
+	u32 hs_curr_level_offset;
+};
+
+static inline struct tegra_xusb_usb2_lane *
+to_usb2_lane(struct tegra_xusb_lane *lane)
+{
+	return container_of(lane, struct tegra_xusb_usb2_lane, base);
+}
+
+struct tegra_xusb_ulpi_lane {
+	struct tegra_xusb_lane base;
+};
+
+static inline struct tegra_xusb_ulpi_lane *
+to_ulpi_lane(struct tegra_xusb_lane *lane)
+{
+	return container_of(lane, struct tegra_xusb_ulpi_lane, base);
+}
+
+struct tegra_xusb_hsic_lane {
+	struct tegra_xusb_lane base;
+
+	u32 strobe_trim;
+	u32 rx_strobe_trim;
+	u32 rx_data_trim;
+	u32 tx_rtune_n;
+	u32 tx_rtune_p;
+	u32 tx_rslew_n;
+	u32 tx_rslew_p;
+	bool auto_term;
+};
+
+static inline struct tegra_xusb_hsic_lane *
+to_hsic_lane(struct tegra_xusb_lane *lane)
+{
+	return container_of(lane, struct tegra_xusb_hsic_lane, base);
+}
+
+struct tegra_xusb_pcie_lane {
+	struct tegra_xusb_lane base;
+};
+
+static inline struct tegra_xusb_pcie_lane *
+to_pcie_lane(struct tegra_xusb_lane *lane)
+{
+	return container_of(lane, struct tegra_xusb_pcie_lane, base);
+}
+
+struct tegra_xusb_sata_lane {
+	struct tegra_xusb_lane base;
+};
+
+static inline struct tegra_xusb_sata_lane *
+to_sata_lane(struct tegra_xusb_lane *lane)
+{
+	return container_of(lane, struct tegra_xusb_sata_lane, base);
+}
+
+struct tegra_xusb_lane_ops {
+	struct tegra_xusb_lane *(*probe)(struct tegra_xusb_pad *pad,
+					 struct device_node *np,
+					 unsigned int index);
+	void (*remove)(struct tegra_xusb_lane *lane);
+	void (*iddq_enable)(struct tegra_xusb_lane *lane);
+	void (*iddq_disable)(struct tegra_xusb_lane *lane);
+	int (*enable_phy_sleepwalk)(struct tegra_xusb_lane *lane, enum usb_device_speed speed);
+	int (*disable_phy_sleepwalk)(struct tegra_xusb_lane *lane);
+	int (*enable_phy_wake)(struct tegra_xusb_lane *lane);
+	int (*disable_phy_wake)(struct tegra_xusb_lane *lane);
+	bool (*remote_wake_detected)(struct tegra_xusb_lane *lane);
+};
+
+bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane, const char *function);
+
+/*
+ * pads
+ */
+struct tegra_xusb_pad_soc;
+struct tegra_xusb_padctl;
+
+struct tegra_xusb_pad_ops {
+	struct tegra_xusb_pad *(*probe)(struct tegra_xusb_padctl *padctl,
+					const struct tegra_xusb_pad_soc *soc,
+					struct device_node *np);
+	void (*remove)(struct tegra_xusb_pad *pad);
+};
+
+struct tegra_xusb_pad_soc {
+	const char *name;
+
+	const struct tegra_xusb_lane_soc *lanes;
+	unsigned int num_lanes;
+
+	const struct tegra_xusb_pad_ops *ops;
+};
+
+struct tegra_xusb_pad {
+	const struct tegra_xusb_pad_soc *soc;
+	struct tegra_xusb_padctl *padctl;
+	struct phy_provider *provider;
+	struct phy **lanes;
+	struct device dev;
+
+	const struct tegra_xusb_lane_ops *ops;
+
+	struct list_head list;
+};
+
+static inline struct tegra_xusb_pad *to_tegra_xusb_pad(struct device *dev)
+{
+	return container_of(dev, struct tegra_xusb_pad, dev);
+}
+
+int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
+			struct tegra_xusb_padctl *padctl,
+			struct device_node *np);
+int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
+			    const struct phy_ops *ops);
+void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad);
+
+struct tegra_xusb_usb3_pad {
+	struct tegra_xusb_pad base;
+
+	unsigned int enable;
+	struct mutex lock;
+};
+
+static inline struct tegra_xusb_usb3_pad *
+to_usb3_pad(struct tegra_xusb_pad *pad)
+{
+	return container_of(pad, struct tegra_xusb_usb3_pad, base);
+}
+
+struct tegra_xusb_usb2_pad {
+	struct tegra_xusb_pad base;
+
+	struct clk *clk;
+	unsigned int enable;
+	struct mutex lock;
+};
+
+static inline struct tegra_xusb_usb2_pad *
+to_usb2_pad(struct tegra_xusb_pad *pad)
+{
+	return container_of(pad, struct tegra_xusb_usb2_pad, base);
+}
+
+struct tegra_xusb_ulpi_pad {
+	struct tegra_xusb_pad base;
+};
+
+static inline struct tegra_xusb_ulpi_pad *
+to_ulpi_pad(struct tegra_xusb_pad *pad)
+{
+	return container_of(pad, struct tegra_xusb_ulpi_pad, base);
+}
+
+struct tegra_xusb_hsic_pad {
+	struct tegra_xusb_pad base;
+
+	struct regulator *supply;
+	struct clk *clk;
+};
+
+static inline struct tegra_xusb_hsic_pad *
+to_hsic_pad(struct tegra_xusb_pad *pad)
+{
+	return container_of(pad, struct tegra_xusb_hsic_pad, base);
+}
+
+struct tegra_xusb_pcie_pad {
+	struct tegra_xusb_pad base;
+
+	struct reset_control *rst;
+	struct clk *pll;
+
+	bool enable;
+};
+
+static inline struct tegra_xusb_pcie_pad *
+to_pcie_pad(struct tegra_xusb_pad *pad)
+{
+	return container_of(pad, struct tegra_xusb_pcie_pad, base);
+}
+
+struct tegra_xusb_sata_pad {
+	struct tegra_xusb_pad base;
+
+	struct reset_control *rst;
+	struct clk *pll;
+
+	bool enable;
+};
+
+static inline struct tegra_xusb_sata_pad *
+to_sata_pad(struct tegra_xusb_pad *pad)
+{
+	return container_of(pad, struct tegra_xusb_sata_pad, base);
+}
+
+/*
+ * ports
+ */
+struct tegra_xusb_port_ops;
+
+struct tegra_xusb_port {
+	struct tegra_xusb_padctl *padctl;
+	struct tegra_xusb_lane *lane;
+	unsigned int index;
+
+	struct list_head list;
+	struct device dev;
+
+	struct usb_role_switch *usb_role_sw;
+	struct work_struct usb_phy_work;
+	struct usb_phy usb_phy;
+
+	const struct tegra_xusb_port_ops *ops;
+};
+
+static inline struct tegra_xusb_port *to_tegra_xusb_port(struct device *dev)
+{
+	return container_of(dev, struct tegra_xusb_port, dev);
+}
+
+struct tegra_xusb_lane_map {
+	unsigned int port;
+	const char *type;
+	unsigned int index;
+	const char *func;
+};
+
+struct tegra_xusb_lane *
+tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
+			  const struct tegra_xusb_lane_map *map,
+			  const char *function);
+
+struct tegra_xusb_port *
+tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
+		     unsigned int index);
+
+struct tegra_xusb_usb2_port {
+	struct tegra_xusb_port base;
+
+	struct regulator *supply;
+	enum usb_dr_mode mode;
+	bool internal;
+	int usb3_port_fake;
+};
+
+static inline struct tegra_xusb_usb2_port *
+to_usb2_port(struct tegra_xusb_port *port)
+{
+	return container_of(port, struct tegra_xusb_usb2_port, base);
+}
+
+struct tegra_xusb_usb2_port *
+tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl,
+			  unsigned int index);
+void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port);
+void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port);
+
+struct tegra_xusb_ulpi_port {
+	struct tegra_xusb_port base;
+
+	struct regulator *supply;
+	bool internal;
+};
+
+static inline struct tegra_xusb_ulpi_port *
+to_ulpi_port(struct tegra_xusb_port *port)
+{
+	return container_of(port, struct tegra_xusb_ulpi_port, base);
+}
+
+void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port);
+
+struct tegra_xusb_hsic_port {
+	struct tegra_xusb_port base;
+};
+
+static inline struct tegra_xusb_hsic_port *
+to_hsic_port(struct tegra_xusb_port *port)
+{
+	return container_of(port, struct tegra_xusb_hsic_port, base);
+}
+
+void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port);
+
+struct tegra_xusb_usb3_port {
+	struct tegra_xusb_port base;
+	bool context_saved;
+	unsigned int port;
+	bool internal;
+	bool disable_gen2;
+
+	u32 tap1;
+	u32 amp;
+	u32 ctle_z;
+	u32 ctle_g;
+};
+
+static inline struct tegra_xusb_usb3_port *
+to_usb3_port(struct tegra_xusb_port *port)
+{
+	return container_of(port, struct tegra_xusb_usb3_port, base);
+}
+
+struct tegra_xusb_usb3_port *
+tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl,
+			  unsigned int index);
+void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port);
+
+struct tegra_xusb_port_ops {
+	void (*release)(struct tegra_xusb_port *port);
+	void (*remove)(struct tegra_xusb_port *port);
+	int (*enable)(struct tegra_xusb_port *port);
+	void (*disable)(struct tegra_xusb_port *port);
+	struct tegra_xusb_lane *(*map)(struct tegra_xusb_port *port);
+};
+
+/*
+ * pad controller
+ */
+struct tegra_xusb_padctl_soc;
+
+struct tegra_xusb_padctl_ops {
+	struct tegra_xusb_padctl *
+		(*probe)(struct device *dev,
+			 const struct tegra_xusb_padctl_soc *soc);
+	void (*remove)(struct tegra_xusb_padctl *padctl);
+
+	int (*suspend_noirq)(struct tegra_xusb_padctl *padctl);
+	int (*resume_noirq)(struct tegra_xusb_padctl *padctl);
+	int (*usb3_save_context)(struct tegra_xusb_padctl *padctl,
+				 unsigned int index);
+	int (*hsic_set_idle)(struct tegra_xusb_padctl *padctl,
+			     unsigned int index, bool idle);
+	int (*usb3_set_lfps_detect)(struct tegra_xusb_padctl *padctl,
+				    unsigned int index, bool enable);
+	int (*vbus_override)(struct tegra_xusb_padctl *padctl, bool set);
+	int (*utmi_port_reset)(struct phy *phy);
+	void (*utmi_pad_power_on)(struct phy *phy);
+	void (*utmi_pad_power_down)(struct phy *phy);
+};
+
+struct tegra_xusb_padctl_soc {
+	const struct tegra_xusb_pad_soc * const *pads;
+	unsigned int num_pads;
+
+	struct {
+		struct {
+			const struct tegra_xusb_port_ops *ops;
+			unsigned int count;
+		} usb2, ulpi, hsic, usb3;
+	} ports;
+
+	const struct tegra_xusb_padctl_ops *ops;
+
+	const char * const *supply_names;
+	unsigned int num_supplies;
+	bool supports_gen2;
+	bool need_fake_usb3_port;
+	bool poll_trk_completed;
+	bool trk_hw_mode;
+	bool trk_update_on_idle;
+	bool supports_lp_cfg_en;
+	bool has_per_pad_term;
+};
+
+struct tegra_xusb_padctl {
+	struct device *dev;
+	void __iomem *regs;
+	struct mutex lock;
+	struct reset_control *rst;
+
+	const struct tegra_xusb_padctl_soc *soc;
+
+	struct tegra_xusb_pad *pcie;
+	struct tegra_xusb_pad *sata;
+	struct tegra_xusb_pad *ulpi;
+	struct tegra_xusb_pad *usb2;
+	struct tegra_xusb_pad *hsic;
+
+	struct list_head ports;
+	struct list_head lanes;
+	struct list_head pads;
+
+	unsigned int enable;
+
+	struct clk *clk;
+
+	struct regulator_bulk_data *supplies;
+};
+
+static inline void padctl_writel(struct tegra_xusb_padctl *padctl, u32 value,
+				 unsigned long offset)
+{
+	dev_dbg(padctl->dev, "%08lx < %08x\n", offset, value);
+	writel(value, padctl->regs + offset);
+}
+
+static inline u32 padctl_readl(struct tegra_xusb_padctl *padctl,
+			       unsigned long offset)
+{
+	u32 value = readl(padctl->regs + offset);
+	dev_dbg(padctl->dev, "%08lx > %08x\n", offset, value);
+	return value;
+}
+
+static inline u32 padctl_readl_poll(struct tegra_xusb_padctl *padctl,
+				    unsigned long offset, u32 val, u32 mask,
+				    int us)
+{
+	u32 regval;
+	int err;
+
+	err = readl_poll_timeout(padctl->regs + offset, regval,
+				 (regval & mask) == val, 1, us);
+	if (err) {
+		dev_err(padctl->dev, "%08lx poll timeout > %08x\n", offset,
+			regval);
+	}
+
+	return err;
+}
+
+struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
+					     const char *name,
+					     unsigned int index);
+
+#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
+extern const struct tegra_xusb_padctl_soc tegra124_xusb_padctl_soc;
+#endif
+#if defined(CONFIG_ARCH_TEGRA_210_SOC)
+extern const struct tegra_xusb_padctl_soc tegra210_xusb_padctl_soc;
+#endif
+#if defined(CONFIG_ARCH_TEGRA_186_SOC)
+extern const struct tegra_xusb_padctl_soc tegra186_xusb_padctl_soc;
+#endif
+#if defined(CONFIG_ARCH_TEGRA_194_SOC)
+extern const struct tegra_xusb_padctl_soc tegra194_xusb_padctl_soc;
+#endif
+#if defined(CONFIG_ARCH_TEGRA_234_SOC)
+extern const struct tegra_xusb_padctl_soc tegra234_xusb_padctl_soc;
+#endif
+
+#endif /* __PHY_TEGRA_XUSB_H */