From aeb709c767aeca996e6011133e4f7bdb2a4af652 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Wed, 30 Sep 2026 09:59:20 +0000 Subject: selftests/bpf: Add a test for objects stuck in free_by_rcu_ttrace Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first free_bulk() starts RCU tasks trace GP and the rest of the elements are freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and waiting_for_gp_ttrace lists are empty. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- drivers/usb/chipidea/ulpi.c | 108 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 108 insertions(+) create mode 100644 drivers/usb/chipidea/ulpi.c (limited to 'drivers/usb/chipidea/ulpi.c') diff --git a/drivers/usb/chipidea/ulpi.c b/drivers/usb/chipidea/ulpi.c new file mode 100644 index 000000000..dfec07e8a --- /dev/null +++ b/drivers/usb/chipidea/ulpi.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2016 Linaro Ltd. + */ + +#include +#include +#include + +#include "ci.h" + +#define ULPI_WAKEUP BIT(31) +#define ULPI_RUN BIT(30) +#define ULPI_WRITE BIT(29) +#define ULPI_SYNC_STATE BIT(27) +#define ULPI_ADDR(n) ((n) << 16) +#define ULPI_DATA(n) (n) + +static int ci_ulpi_wait(struct ci_hdrc *ci, u32 mask) +{ + unsigned long usec = 10000; + + while (usec--) { + if (!hw_read(ci, OP_ULPI_VIEWPORT, mask)) + return 0; + + udelay(1); + } + + return -ETIMEDOUT; +} + +static int ci_ulpi_read(struct device *dev, u8 addr) +{ + struct ci_hdrc *ci = dev_get_drvdata(dev); + int ret; + + hw_write(ci, OP_ULPI_VIEWPORT, 0xffffffff, ULPI_WRITE | ULPI_WAKEUP); + ret = ci_ulpi_wait(ci, ULPI_WAKEUP); + if (ret) + return ret; + + hw_write(ci, OP_ULPI_VIEWPORT, 0xffffffff, ULPI_RUN | ULPI_ADDR(addr)); + ret = ci_ulpi_wait(ci, ULPI_RUN); + if (ret) + return ret; + + return hw_read(ci, OP_ULPI_VIEWPORT, GENMASK(15, 8)) >> 8; +} + +static int ci_ulpi_write(struct device *dev, u8 addr, u8 val) +{ + struct ci_hdrc *ci = dev_get_drvdata(dev); + int ret; + + hw_write(ci, OP_ULPI_VIEWPORT, 0xffffffff, ULPI_WRITE | ULPI_WAKEUP); + ret = ci_ulpi_wait(ci, ULPI_WAKEUP); + if (ret) + return ret; + + hw_write(ci, OP_ULPI_VIEWPORT, 0xffffffff, + ULPI_RUN | ULPI_WRITE | ULPI_ADDR(addr) | val); + return ci_ulpi_wait(ci, ULPI_RUN); +} + +int ci_ulpi_init(struct ci_hdrc *ci) +{ + if (ci->platdata->phy_mode != USBPHY_INTERFACE_MODE_ULPI) + return 0; + + /* + * Set PORTSC correctly so we can read/write ULPI registers for + * identification purposes + */ + hw_phymode_configure(ci); + + ci->ulpi_ops.read = ci_ulpi_read; + ci->ulpi_ops.write = ci_ulpi_write; + ci->ulpi = ulpi_register_interface(ci->dev, &ci->ulpi_ops); + if (IS_ERR(ci->ulpi)) + dev_err(ci->dev, "failed to register ULPI interface"); + + return PTR_ERR_OR_ZERO(ci->ulpi); +} + +void ci_ulpi_exit(struct ci_hdrc *ci) +{ + if (ci->ulpi) { + ulpi_unregister_interface(ci->ulpi); + ci->ulpi = NULL; + } +} + +int ci_ulpi_resume(struct ci_hdrc *ci) +{ + int cnt = 100000; + + if (ci->platdata->phy_mode != USBPHY_INTERFACE_MODE_ULPI) + return 0; + + while (cnt-- > 0) { + if (hw_read(ci, OP_ULPI_VIEWPORT, ULPI_SYNC_STATE)) + return 0; + udelay(1); + } + + return -ETIMEDOUT; +} -- cgit v1.3.1