From 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Sun, 16 Aug 2026 15:32:33 +0200 Subject: kbuild: rust: keep Rust objects out of Clang LTO with inline helpers Under `CONFIG_LTO_CLANG` + `CONFIG_RUST_INLINE_HELPERS`, one may hit `objtool` errors such as: vmlinux.o: error: objtool: _R..._3Gsp4boot+0xd6a: can't find jump dest instruction at .text._R..._3Gsp4boot+0x1dfd The reason is that in such builds, the Clang invocation that compiles the combined Rust plus helpers bitcode emits LLVM bitcode (again) -- the final code generation happens in the linker's LTO step, which the `-mllvm` trap options passed to Clang do not reach. This, in turn, means that unreachable traps are missing, and the impossible paths do not merely fallthrough to the next symbol, but past the end of their own section, since LTO builds place each function in its own section. Thus filter `CC_FLAGS_LTO` out of the Clang invocation, so that it always emits machine code directly, with the traps in place. Assisted-by: LLM Cc: Gary Guo Cc: Boqun Feng Cc: Alice Ryhl Cc: Matthew Maurer Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: stable@vger.kernel.org Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust") Acked-by: Gary Guo Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- drivers/usb/dwc3/debugfs.c | 1039 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1039 insertions(+) create mode 100644 drivers/usb/dwc3/debugfs.c (limited to 'drivers/usb/dwc3/debugfs.c') diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c new file mode 100644 index 000000000..65d909e4b --- /dev/null +++ b/drivers/usb/dwc3/debugfs.c @@ -0,0 +1,1039 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * debugfs.c - DesignWare USB3 DRD Controller DebugFS file + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com + * + * Authors: Felipe Balbi , + * Sebastian Andrzej Siewior + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "core.h" +#include "gadget.h" +#include "io.h" +#include "debug.h" + +#define DWC3_LSP_MUX_UNSELECTED 0xfffff + +#define dump_register(nm) \ +{ \ + .name = __stringify(nm), \ + .offset = DWC3_ ##nm, \ +} + +#define dump_ep_register_set(n) \ + { \ + .name = "DEPCMDPAR2("__stringify(n)")", \ + .offset = DWC3_DEPCMDPAR2(n), \ + }, \ + { \ + .name = "DEPCMDPAR1("__stringify(n)")", \ + .offset = DWC3_DEPCMDPAR1(n), \ + }, \ + { \ + .name = "DEPCMDPAR0("__stringify(n)")", \ + .offset = DWC3_DEPCMDPAR0(n), \ + }, \ + { \ + .name = "DEPCMD("__stringify(n)")", \ + .offset = DWC3_DEPCMD(n), \ + } + + +static const struct debugfs_reg32 dwc3_regs[] = { + dump_register(GSBUSCFG0), + dump_register(GSBUSCFG1), + dump_register(GTXTHRCFG), + dump_register(GRXTHRCFG), + dump_register(GCTL), + dump_register(GEVTEN), + dump_register(GSTS), + dump_register(GUCTL1), + dump_register(GSNPSID), + dump_register(GGPIO), + dump_register(GUID), + dump_register(GUCTL), + dump_register(GBUSERRADDR0), + dump_register(GBUSERRADDR1), + dump_register(GPRTBIMAP0), + dump_register(GPRTBIMAP1), + dump_register(GHWPARAMS0), + dump_register(GHWPARAMS1), + dump_register(GHWPARAMS2), + dump_register(GHWPARAMS3), + dump_register(GHWPARAMS4), + dump_register(GHWPARAMS5), + dump_register(GHWPARAMS6), + dump_register(GHWPARAMS7), + dump_register(GDBGFIFOSPACE), + dump_register(GDBGLTSSM), + dump_register(GDBGBMU), + dump_register(GPRTBIMAP_HS0), + dump_register(GPRTBIMAP_HS1), + dump_register(GPRTBIMAP_FS0), + dump_register(GPRTBIMAP_FS1), + dump_register(GUCTL2), + dump_register(VER_NUMBER), + dump_register(VER_TYPE), + + dump_register(GUSB2PHYCFG(0)), + dump_register(GUSB2PHYCFG(1)), + dump_register(GUSB2PHYCFG(2)), + dump_register(GUSB2PHYCFG(3)), + dump_register(GUSB2PHYCFG(4)), + dump_register(GUSB2PHYCFG(5)), + dump_register(GUSB2PHYCFG(6)), + dump_register(GUSB2PHYCFG(7)), + dump_register(GUSB2PHYCFG(8)), + dump_register(GUSB2PHYCFG(9)), + dump_register(GUSB2PHYCFG(10)), + dump_register(GUSB2PHYCFG(11)), + dump_register(GUSB2PHYCFG(12)), + dump_register(GUSB2PHYCFG(13)), + dump_register(GUSB2PHYCFG(14)), + dump_register(GUSB2PHYCFG(15)), + + dump_register(GUSB2I2CCTL(0)), + dump_register(GUSB2I2CCTL(1)), + dump_register(GUSB2I2CCTL(2)), + dump_register(GUSB2I2CCTL(3)), + dump_register(GUSB2I2CCTL(4)), + dump_register(GUSB2I2CCTL(5)), + dump_register(GUSB2I2CCTL(6)), + dump_register(GUSB2I2CCTL(7)), + dump_register(GUSB2I2CCTL(8)), + dump_register(GUSB2I2CCTL(9)), + dump_register(GUSB2I2CCTL(10)), + dump_register(GUSB2I2CCTL(11)), + dump_register(GUSB2I2CCTL(12)), + dump_register(GUSB2I2CCTL(13)), + dump_register(GUSB2I2CCTL(14)), + dump_register(GUSB2I2CCTL(15)), + + dump_register(GUSB2PHYACC(0)), + dump_register(GUSB2PHYACC(1)), + dump_register(GUSB2PHYACC(2)), + dump_register(GUSB2PHYACC(3)), + dump_register(GUSB2PHYACC(4)), + dump_register(GUSB2PHYACC(5)), + dump_register(GUSB2PHYACC(6)), + dump_register(GUSB2PHYACC(7)), + dump_register(GUSB2PHYACC(8)), + dump_register(GUSB2PHYACC(9)), + dump_register(GUSB2PHYACC(10)), + dump_register(GUSB2PHYACC(11)), + dump_register(GUSB2PHYACC(12)), + dump_register(GUSB2PHYACC(13)), + dump_register(GUSB2PHYACC(14)), + dump_register(GUSB2PHYACC(15)), + + dump_register(GUSB3PIPECTL(0)), + dump_register(GUSB3PIPECTL(1)), + dump_register(GUSB3PIPECTL(2)), + dump_register(GUSB3PIPECTL(3)), + dump_register(GUSB3PIPECTL(4)), + dump_register(GUSB3PIPECTL(5)), + dump_register(GUSB3PIPECTL(6)), + dump_register(GUSB3PIPECTL(7)), + dump_register(GUSB3PIPECTL(8)), + dump_register(GUSB3PIPECTL(9)), + dump_register(GUSB3PIPECTL(10)), + dump_register(GUSB3PIPECTL(11)), + dump_register(GUSB3PIPECTL(12)), + dump_register(GUSB3PIPECTL(13)), + dump_register(GUSB3PIPECTL(14)), + dump_register(GUSB3PIPECTL(15)), + + dump_register(GTXFIFOSIZ(0)), + dump_register(GTXFIFOSIZ(1)), + dump_register(GTXFIFOSIZ(2)), + dump_register(GTXFIFOSIZ(3)), + dump_register(GTXFIFOSIZ(4)), + dump_register(GTXFIFOSIZ(5)), + dump_register(GTXFIFOSIZ(6)), + dump_register(GTXFIFOSIZ(7)), + dump_register(GTXFIFOSIZ(8)), + dump_register(GTXFIFOSIZ(9)), + dump_register(GTXFIFOSIZ(10)), + dump_register(GTXFIFOSIZ(11)), + dump_register(GTXFIFOSIZ(12)), + dump_register(GTXFIFOSIZ(13)), + dump_register(GTXFIFOSIZ(14)), + dump_register(GTXFIFOSIZ(15)), + dump_register(GTXFIFOSIZ(16)), + dump_register(GTXFIFOSIZ(17)), + dump_register(GTXFIFOSIZ(18)), + dump_register(GTXFIFOSIZ(19)), + dump_register(GTXFIFOSIZ(20)), + dump_register(GTXFIFOSIZ(21)), + dump_register(GTXFIFOSIZ(22)), + dump_register(GTXFIFOSIZ(23)), + dump_register(GTXFIFOSIZ(24)), + dump_register(GTXFIFOSIZ(25)), + dump_register(GTXFIFOSIZ(26)), + dump_register(GTXFIFOSIZ(27)), + dump_register(GTXFIFOSIZ(28)), + dump_register(GTXFIFOSIZ(29)), + dump_register(GTXFIFOSIZ(30)), + dump_register(GTXFIFOSIZ(31)), + + dump_register(GRXFIFOSIZ(0)), + dump_register(GRXFIFOSIZ(1)), + dump_register(GRXFIFOSIZ(2)), + dump_register(GRXFIFOSIZ(3)), + dump_register(GRXFIFOSIZ(4)), + dump_register(GRXFIFOSIZ(5)), + dump_register(GRXFIFOSIZ(6)), + dump_register(GRXFIFOSIZ(7)), + dump_register(GRXFIFOSIZ(8)), + dump_register(GRXFIFOSIZ(9)), + dump_register(GRXFIFOSIZ(10)), + dump_register(GRXFIFOSIZ(11)), + dump_register(GRXFIFOSIZ(12)), + dump_register(GRXFIFOSIZ(13)), + dump_register(GRXFIFOSIZ(14)), + dump_register(GRXFIFOSIZ(15)), + dump_register(GRXFIFOSIZ(16)), + dump_register(GRXFIFOSIZ(17)), + dump_register(GRXFIFOSIZ(18)), + dump_register(GRXFIFOSIZ(19)), + dump_register(GRXFIFOSIZ(20)), + dump_register(GRXFIFOSIZ(21)), + dump_register(GRXFIFOSIZ(22)), + dump_register(GRXFIFOSIZ(23)), + dump_register(GRXFIFOSIZ(24)), + dump_register(GRXFIFOSIZ(25)), + dump_register(GRXFIFOSIZ(26)), + dump_register(GRXFIFOSIZ(27)), + dump_register(GRXFIFOSIZ(28)), + dump_register(GRXFIFOSIZ(29)), + dump_register(GRXFIFOSIZ(30)), + dump_register(GRXFIFOSIZ(31)), + + dump_register(GEVNTADRLO(0)), + dump_register(GEVNTADRHI(0)), + dump_register(GEVNTSIZ(0)), + dump_register(GEVNTCOUNT(0)), + + dump_register(GHWPARAMS8), + dump_register(GUCTL3), + dump_register(GFLADJ), + dump_register(DCFG), + dump_register(DCTL), + dump_register(DEVTEN), + dump_register(DSTS), + dump_register(DGCMDPAR), + dump_register(DGCMD), + dump_register(DALEPENA), + + dump_ep_register_set(0), + dump_ep_register_set(1), + dump_ep_register_set(2), + dump_ep_register_set(3), + dump_ep_register_set(4), + dump_ep_register_set(5), + dump_ep_register_set(6), + dump_ep_register_set(7), + dump_ep_register_set(8), + dump_ep_register_set(9), + dump_ep_register_set(10), + dump_ep_register_set(11), + dump_ep_register_set(12), + dump_ep_register_set(13), + dump_ep_register_set(14), + dump_ep_register_set(15), + dump_ep_register_set(16), + dump_ep_register_set(17), + dump_ep_register_set(18), + dump_ep_register_set(19), + dump_ep_register_set(20), + dump_ep_register_set(21), + dump_ep_register_set(22), + dump_ep_register_set(23), + dump_ep_register_set(24), + dump_ep_register_set(25), + dump_ep_register_set(26), + dump_ep_register_set(27), + dump_ep_register_set(28), + dump_ep_register_set(29), + dump_ep_register_set(30), + dump_ep_register_set(31), + + dump_register(OCFG), + dump_register(OCTL), + dump_register(OEVT), + dump_register(OEVTEN), + dump_register(OSTS), +}; + +static void dwc3_host_lsp(struct seq_file *s) +{ + struct dwc3 *dwc = s->private; + bool dbc_enabled; + u32 sel; + u32 reg; + u32 val; + + dbc_enabled = !!(dwc->hwparams.hwparams1 & DWC3_GHWPARAMS1_ENDBC); + + sel = dwc->dbg_lsp_select; + if (sel == DWC3_LSP_MUX_UNSELECTED) { + seq_puts(s, "Write LSP selection to print for host\n"); + return; + } + + reg = DWC3_GDBGLSPMUX_HOSTSELECT(sel); + + dwc3_writel(dwc, DWC3_GDBGLSPMUX, reg); + val = dwc3_readl(dwc, DWC3_GDBGLSP); + seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", sel, val); + + if (dbc_enabled && sel < 256) { + reg |= DWC3_GDBGLSPMUX_ENDBC; + dwc3_writel(dwc, DWC3_GDBGLSPMUX, reg); + val = dwc3_readl(dwc, DWC3_GDBGLSP); + seq_printf(s, "GDBGLSP_DBC[%d] = 0x%08x\n", sel, val); + } +} + +static void dwc3_gadget_lsp(struct seq_file *s) +{ + struct dwc3 *dwc = s->private; + int i; + u32 reg; + + for (i = 0; i < 16; i++) { + reg = DWC3_GDBGLSPMUX_DEVSELECT(i); + dwc3_writel(dwc, DWC3_GDBGLSPMUX, reg); + reg = dwc3_readl(dwc, DWC3_GDBGLSP); + seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", i, reg); + } +} + +static int dwc3_lsp_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned int current_mode; + unsigned long flags; + u32 reg; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc, DWC3_GSTS); + current_mode = DWC3_GSTS_CURMOD(reg); + + switch (current_mode) { + case DWC3_GSTS_CURMOD_HOST: + dwc3_host_lsp(s); + break; + case DWC3_GSTS_CURMOD_DEVICE: + dwc3_gadget_lsp(s); + break; + default: + seq_puts(s, "Mode is unknown, no LSP register printed\n"); + break; + } + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_lsp_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_lsp_show, inode->i_private); +} + +static ssize_t dwc3_lsp_write(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + unsigned long flags; + char buf[32] = { 0 }; + u32 sel; + int ret; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + ret = kstrtouint(buf, 0, &sel); + if (ret) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + dwc->dbg_lsp_select = sel; + spin_unlock_irqrestore(&dwc->lock, flags); + + return count; +} + +static const struct file_operations dwc3_lsp_fops = { + .open = dwc3_lsp_open, + .write = dwc3_lsp_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dwc3_mode_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 reg; + u32 mode; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc, DWC3_GCTL); + spin_unlock_irqrestore(&dwc->lock, flags); + + mode = DWC3_GCTL_PRTCAP(reg); + switch (mode) { + case DWC3_GCTL_PRTCAP_HOST: + case DWC3_GCTL_PRTCAP_DEVICE: + case DWC3_GCTL_PRTCAP_OTG: + seq_printf(s, "%s\n", dwc3_mode_string(mode)); + break; + default: + seq_printf(s, "UNKNOWN %08x\n", mode); + } + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_mode_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_mode_show, inode->i_private); +} + +static ssize_t dwc3_mode_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + u32 mode = 0; + char buf[32]; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (dwc->dr_mode != USB_DR_MODE_OTG) + return count; + + if (!strncmp(buf, "host", 4)) + mode = DWC3_GCTL_PRTCAP_HOST; + + if (!strncmp(buf, "device", 6)) + mode = DWC3_GCTL_PRTCAP_DEVICE; + + if (!strncmp(buf, "otg", 3)) + mode = DWC3_GCTL_PRTCAP_OTG; + + dwc3_set_mode(dwc, mode); + + return count; +} + +static const struct file_operations dwc3_mode_fops = { + .open = dwc3_mode_open, + .write = dwc3_mode_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dwc3_testmode_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 reg; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc, DWC3_DCTL); + reg &= DWC3_DCTL_TSTCTRL_MASK; + reg >>= 1; + spin_unlock_irqrestore(&dwc->lock, flags); + + switch (reg) { + case 0: + seq_puts(s, "no test\n"); + break; + case USB_TEST_J: + seq_puts(s, "test_j\n"); + break; + case USB_TEST_K: + seq_puts(s, "test_k\n"); + break; + case USB_TEST_SE0_NAK: + seq_puts(s, "test_se0_nak\n"); + break; + case USB_TEST_PACKET: + seq_puts(s, "test_packet\n"); + break; + case USB_TEST_FORCE_ENABLE: + seq_puts(s, "test_force_enable\n"); + break; + default: + seq_printf(s, "UNKNOWN %d\n", reg); + } + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_testmode_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_testmode_show, inode->i_private); +} + +static ssize_t dwc3_testmode_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 testmode = 0; + char buf[32]; + int ret; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "test_j", 6)) + testmode = USB_TEST_J; + else if (!strncmp(buf, "test_k", 6)) + testmode = USB_TEST_K; + else if (!strncmp(buf, "test_se0_nak", 12)) + testmode = USB_TEST_SE0_NAK; + else if (!strncmp(buf, "test_packet", 11)) + testmode = USB_TEST_PACKET; + else if (!strncmp(buf, "test_force_enable", 17)) + testmode = USB_TEST_FORCE_ENABLE; + else + testmode = 0; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + dwc3_gadget_set_test_mode(dwc, testmode); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return count; +} + +static const struct file_operations dwc3_testmode_fops = { + .open = dwc3_testmode_open, + .write = dwc3_testmode_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dwc3_link_state_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned long flags; + enum dwc3_link_state state; + u32 reg; + u8 speed; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc, DWC3_GSTS); + if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) { + seq_puts(s, "Not available\n"); + spin_unlock_irqrestore(&dwc->lock, flags); + pm_runtime_put_sync(dwc->dev); + return 0; + } + + reg = dwc3_readl(dwc, DWC3_DSTS); + state = DWC3_DSTS_USBLNKST(reg); + speed = reg & DWC3_DSTS_CONNECTSPD; + + seq_printf(s, "%s\n", (speed >= DWC3_DSTS_SUPERSPEED) ? + dwc3_gadget_link_string(state) : + dwc3_gadget_hs_link_string(state)); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_link_state_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_link_state_show, inode->i_private); +} + +static ssize_t dwc3_link_state_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + unsigned long flags; + enum dwc3_link_state state = 0; + char buf[32]; + u32 reg; + u8 speed; + int ret; + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "SS.Disabled", 11)) + state = DWC3_LINK_STATE_SS_DIS; + else if (!strncmp(buf, "Rx.Detect", 9)) + state = DWC3_LINK_STATE_RX_DET; + else if (!strncmp(buf, "SS.Inactive", 11)) + state = DWC3_LINK_STATE_SS_INACT; + else if (!strncmp(buf, "Recovery", 8)) + state = DWC3_LINK_STATE_RECOV; + else if (!strncmp(buf, "Compliance", 10)) + state = DWC3_LINK_STATE_CMPLY; + else if (!strncmp(buf, "Loopback", 8)) + state = DWC3_LINK_STATE_LPBK; + else + return -EINVAL; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc, DWC3_GSTS); + if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) { + spin_unlock_irqrestore(&dwc->lock, flags); + pm_runtime_put_sync(dwc->dev); + return -EINVAL; + } + + reg = dwc3_readl(dwc, DWC3_DSTS); + speed = reg & DWC3_DSTS_CONNECTSPD; + + if (speed < DWC3_DSTS_SUPERSPEED && + state != DWC3_LINK_STATE_RECOV) { + spin_unlock_irqrestore(&dwc->lock, flags); + pm_runtime_put_sync(dwc->dev); + return -EINVAL; + } + + dwc3_gadget_set_link_state(dwc, state); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return count; +} + +static const struct file_operations dwc3_link_state_fops = { + .open = dwc3_link_state_open, + .write = dwc3_link_state_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +struct dwc3_ep_file_map { + const char name[25]; + const struct file_operations *const fops; +}; + +static int dwc3_tx_fifo_size_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + u32 mdwidth; + u32 val; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + val = dwc3_core_fifo_space(dep, DWC3_TXFIFO); + + /* Convert to bytes */ + mdwidth = dwc3_mdwidth(dwc); + + val *= mdwidth; + val >>= 3; + seq_printf(s, "%u\n", val); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_rx_fifo_size_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + u32 mdwidth; + u32 val; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + val = dwc3_core_fifo_space(dep, DWC3_RXFIFO); + + /* Convert to bytes */ + mdwidth = dwc3_mdwidth(dwc); + + val *= mdwidth; + val >>= 3; + seq_printf(s, "%u\n", val); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + u32 val; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + val = dwc3_core_fifo_space(dep, DWC3_TXREQQ); + seq_printf(s, "%u\n", val); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + u32 val; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + val = dwc3_core_fifo_space(dep, DWC3_RXREQQ); + seq_printf(s, "%u\n", val); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + u32 val; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ); + seq_printf(s, "%u\n", val); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + u32 val; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ); + seq_printf(s, "%u\n", val); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_event_queue_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + u32 val; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + val = dwc3_core_fifo_space(dep, DWC3_EVENTQ); + seq_printf(s, "%u\n", val); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_transfer_type_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + + spin_lock_irqsave(&dwc->lock, flags); + if (!(dep->flags & DWC3_EP_ENABLED) || !dep->endpoint.desc) { + seq_puts(s, "--\n"); + goto out; + } + + switch (usb_endpoint_type(dep->endpoint.desc)) { + case USB_ENDPOINT_XFER_CONTROL: + seq_puts(s, "control\n"); + break; + case USB_ENDPOINT_XFER_ISOC: + seq_puts(s, "isochronous\n"); + break; + case USB_ENDPOINT_XFER_BULK: + seq_puts(s, "bulk\n"); + break; + case USB_ENDPOINT_XFER_INT: + seq_puts(s, "interrupt\n"); + break; + default: + seq_puts(s, "--\n"); + } + +out: + spin_unlock_irqrestore(&dwc->lock, flags); + + return 0; +} + +static int dwc3_trb_ring_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + int i; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + if (dep->number <= 1) { + seq_puts(s, "--\n"); + goto out; + } + + seq_puts(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n"); + + for (i = 0; i < DWC3_TRB_NUM; i++) { + struct dwc3_trb *trb = &dep->trb_pool[i]; + unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl); + + seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d %c%c\n", + trb->bph, trb->bpl, trb->size, + dwc3_trb_type_string(type), + !!(trb->ctrl & DWC3_TRB_CTRL_IOC), + !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI), + !!(trb->ctrl & DWC3_TRB_CTRL_CSP), + !!(trb->ctrl & DWC3_TRB_CTRL_CHN), + !!(trb->ctrl & DWC3_TRB_CTRL_LST), + !!(trb->ctrl & DWC3_TRB_CTRL_HWO), + dep->trb_enqueue == i ? 'E' : ' ', + dep->trb_dequeue == i ? 'D' : ' '); + } + +out: + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +static int dwc3_ep_info_register_show(struct seq_file *s, void *unused) +{ + struct dwc3_ep *dep = s->private; + struct dwc3 *dwc = dep->dwc; + unsigned long flags; + u64 ep_info; + u32 lower_32_bits; + u32 upper_32_bits; + u32 reg; + int ret; + + ret = pm_runtime_resume_and_get(dwc->dev); + if (ret < 0) + return ret; + + spin_lock_irqsave(&dwc->lock, flags); + reg = DWC3_GDBGLSPMUX_EPSELECT(dep->number); + dwc3_writel(dwc, DWC3_GDBGLSPMUX, reg); + + lower_32_bits = dwc3_readl(dwc, DWC3_GDBGEPINFO0); + upper_32_bits = dwc3_readl(dwc, DWC3_GDBGEPINFO1); + + ep_info = ((u64)upper_32_bits << 32) | lower_32_bits; + seq_printf(s, "0x%016llx\n", ep_info); + spin_unlock_irqrestore(&dwc->lock, flags); + + pm_runtime_put_sync(dwc->dev); + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_size); +DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_size); +DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue); +DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type); +DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring); +DEFINE_SHOW_ATTRIBUTE(dwc3_ep_info_register); + +static const struct dwc3_ep_file_map dwc3_ep_file_map[] = { + { "tx_fifo_size", &dwc3_tx_fifo_size_fops, }, + { "rx_fifo_size", &dwc3_rx_fifo_size_fops, }, + { "tx_request_queue", &dwc3_tx_request_queue_fops, }, + { "rx_request_queue", &dwc3_rx_request_queue_fops, }, + { "rx_info_queue", &dwc3_rx_info_queue_fops, }, + { "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, }, + { "event_queue", &dwc3_event_queue_fops, }, + { "transfer_type", &dwc3_transfer_type_fops, }, + { "trb_ring", &dwc3_trb_ring_fops, }, + { "GDBGEPINFO", &dwc3_ep_info_register_fops, }, +}; + +void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep) +{ + struct dentry *dir; + int i; + + dir = debugfs_create_dir(dep->name, dep->dwc->debug_root); + for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) { + const struct file_operations *fops = dwc3_ep_file_map[i].fops; + const char *name = dwc3_ep_file_map[i].name; + + debugfs_create_file(name, 0444, dir, dep, fops); + } +} + +void dwc3_debugfs_remove_endpoint_dir(struct dwc3_ep *dep) +{ + debugfs_lookup_and_remove(dep->name, dep->dwc->debug_root); +} + +void dwc3_debugfs_init(struct dwc3 *dwc) +{ + struct dentry *root; + + dwc->regset = kzalloc_obj(*dwc->regset); + if (!dwc->regset) + return; + + dwc->dbg_lsp_select = DWC3_LSP_MUX_UNSELECTED; + + dwc->regset->regs = dwc3_regs; + dwc->regset->nregs = ARRAY_SIZE(dwc3_regs); + dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START; + dwc->regset->dev = dwc->dev; + + root = debugfs_create_dir(dev_name(dwc->dev), usb_debug_root); + dwc->debug_root = root; + debugfs_create_regset32("regdump", 0444, root, dwc->regset); + debugfs_create_file("lsp_dump", 0644, root, dwc, &dwc3_lsp_fops); + + if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) + debugfs_create_file("mode", 0644, root, dwc, + &dwc3_mode_fops); + + if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) || + IS_ENABLED(CONFIG_USB_DWC3_GADGET)) { + debugfs_create_file("testmode", 0644, root, dwc, + &dwc3_testmode_fops); + debugfs_create_file("link_state", 0644, root, dwc, + &dwc3_link_state_fops); + } +} + +void dwc3_debugfs_exit(struct dwc3 *dwc) +{ + debugfs_lookup_and_remove(dev_name(dwc->dev), usb_debug_root); + kfree(dwc->regset); +} -- cgit v1.3.1