From 4352b8aee98005853aa63f57d6377282de17a33f Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 23 Aug 2026 13:28:57 -0700 Subject: Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull I3C updates from Alexandre Belloni: "A new driver this cycle, for the AMD AXI I3C controller. There are also new features such as IBI wakeup support, SETAASA device discovery and ACPI support for the the DAA methods, meaning we can now communicate with the SPD devices on DDR5 modules. New driver: - AMD AXI I3C master controller Subsystem: - I3C Common Command Code (CCC) handling improvements, especially around GET CCCs - SETAASA device discovery support - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus - IBI-based wakeup support Drivers: - dw: SETAASA support - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C controller support, PIO queue management support for HCI v1.2 - renesas: improve suspend to RAM support, add runtime PM support" * tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits) i3c: dw: reduce do_daa time if there's no client i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2 i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode i3c: dw: rename "pclk" to "apb" to match dt-binding i3c: dw: make struct dw_i3c_cmd smaller i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding i3c: renesas: Don't register devices when ENTDAA times out i3c: master: dw-i3c-master: fix OD timing for first broadcast i3c: mipi-i3c-hci: Advertise IBI wakeup capability i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI i3c: master: Reject IBI requests from non-IBI-capable devices i3c: master: Add helper to query bus wakeup requirements i3c: master: Report wakeup events for IBIs i3c: master: Support IBI-based wakeup capability i3c: master: Fix potential UAF in i3c_device_match() i3c: master: Fix potential UAF in i3c_device_uevent() i3c: Make dev->desc locking assumptions explicit i3c: master: Fix use-after-free of master->this ... --- net/6lowpan/debugfs.c | 278 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 278 insertions(+) create mode 100644 net/6lowpan/debugfs.c (limited to 'net/6lowpan/debugfs.c') diff --git a/net/6lowpan/debugfs.c b/net/6lowpan/debugfs.c new file mode 100644 index 000000000..600b9563b --- /dev/null +++ b/net/6lowpan/debugfs.c @@ -0,0 +1,278 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * + * Authors: + * (C) 2015 Pengutronix, Alexander Aring + * Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved. + */ + +#include + +#include "6lowpan_i.h" + +#define LOWPAN_DEBUGFS_CTX_PFX_NUM_ARGS 8 + +static struct dentry *lowpan_debugfs; + +static int lowpan_ctx_flag_active_set(void *data, u64 val) +{ + struct lowpan_iphc_ctx *ctx = data; + + if (val != 0 && val != 1) + return -EINVAL; + + if (val) + set_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE, &ctx->flags); + else + clear_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE, &ctx->flags); + + return 0; +} + +static int lowpan_ctx_flag_active_get(void *data, u64 *val) +{ + *val = lowpan_iphc_ctx_is_active(data); + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_active_fops, + lowpan_ctx_flag_active_get, + lowpan_ctx_flag_active_set, "%llu\n"); + +static int lowpan_ctx_flag_c_set(void *data, u64 val) +{ + struct lowpan_iphc_ctx *ctx = data; + + if (val != 0 && val != 1) + return -EINVAL; + + if (val) + set_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags); + else + clear_bit(LOWPAN_IPHC_CTX_FLAG_COMPRESSION, &ctx->flags); + + return 0; +} + +static int lowpan_ctx_flag_c_get(void *data, u64 *val) +{ + *val = lowpan_iphc_ctx_is_compression(data); + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_c_fops, lowpan_ctx_flag_c_get, + lowpan_ctx_flag_c_set, "%llu\n"); + +static int lowpan_ctx_plen_set(void *data, u64 val) +{ + struct lowpan_iphc_ctx *ctx = data; + struct lowpan_iphc_ctx_table *t = + container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]); + + if (val > 128) + return -EINVAL; + + spin_lock_bh(&t->lock); + ctx->plen = val; + spin_unlock_bh(&t->lock); + + return 0; +} + +static int lowpan_ctx_plen_get(void *data, u64 *val) +{ + struct lowpan_iphc_ctx *ctx = data; + struct lowpan_iphc_ctx_table *t = + container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]); + + spin_lock_bh(&t->lock); + *val = ctx->plen; + spin_unlock_bh(&t->lock); + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_plen_fops, lowpan_ctx_plen_get, + lowpan_ctx_plen_set, "%llu\n"); + +static int lowpan_ctx_pfx_show(struct seq_file *file, void *offset) +{ + struct lowpan_iphc_ctx *ctx = file->private; + struct lowpan_iphc_ctx_table *t = + container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]); + + spin_lock_bh(&t->lock); + seq_printf(file, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", + be16_to_cpu(ctx->pfx.s6_addr16[0]), + be16_to_cpu(ctx->pfx.s6_addr16[1]), + be16_to_cpu(ctx->pfx.s6_addr16[2]), + be16_to_cpu(ctx->pfx.s6_addr16[3]), + be16_to_cpu(ctx->pfx.s6_addr16[4]), + be16_to_cpu(ctx->pfx.s6_addr16[5]), + be16_to_cpu(ctx->pfx.s6_addr16[6]), + be16_to_cpu(ctx->pfx.s6_addr16[7])); + spin_unlock_bh(&t->lock); + + return 0; +} + +static int lowpan_ctx_pfx_open(struct inode *inode, struct file *file) +{ + return single_open(file, lowpan_ctx_pfx_show, inode->i_private); +} + +static ssize_t lowpan_ctx_pfx_write(struct file *fp, + const char __user *user_buf, size_t count, + loff_t *ppos) +{ + char buf[128] = {}; + struct seq_file *file = fp->private_data; + struct lowpan_iphc_ctx *ctx = file->private; + struct lowpan_iphc_ctx_table *t = + container_of(ctx, struct lowpan_iphc_ctx_table, table[ctx->id]); + int status = count, n, i; + unsigned int addr[8]; + + if (copy_from_user(&buf, user_buf, min_t(size_t, sizeof(buf) - 1, + count))) { + status = -EFAULT; + goto out; + } + + n = sscanf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x", + &addr[0], &addr[1], &addr[2], &addr[3], &addr[4], + &addr[5], &addr[6], &addr[7]); + if (n != LOWPAN_DEBUGFS_CTX_PFX_NUM_ARGS) { + status = -EINVAL; + goto out; + } + + spin_lock_bh(&t->lock); + for (i = 0; i < 8; i++) + ctx->pfx.s6_addr16[i] = cpu_to_be16(addr[i] & 0xffff); + spin_unlock_bh(&t->lock); + +out: + return status; +} + +static const struct file_operations lowpan_ctx_pfx_fops = { + .open = lowpan_ctx_pfx_open, + .read = seq_read, + .write = lowpan_ctx_pfx_write, + .llseek = seq_lseek, + .release = single_release, +}; + +static void lowpan_dev_debugfs_ctx_init(struct net_device *dev, + struct dentry *ctx, u8 id) +{ + struct lowpan_dev *ldev = lowpan_dev(dev); + struct dentry *root; + char buf[32]; + + if (WARN_ON_ONCE(id >= LOWPAN_IPHC_CTX_TABLE_SIZE)) + return; + + sprintf(buf, "%d", id); + + root = debugfs_create_dir(buf, ctx); + + debugfs_create_file("active", 0644, root, &ldev->ctx.table[id], + &lowpan_ctx_flag_active_fops); + + debugfs_create_file("compression", 0644, root, &ldev->ctx.table[id], + &lowpan_ctx_flag_c_fops); + + debugfs_create_file("prefix", 0644, root, &ldev->ctx.table[id], + &lowpan_ctx_pfx_fops); + + debugfs_create_file("prefix_len", 0644, root, &ldev->ctx.table[id], + &lowpan_ctx_plen_fops); +} + +static int lowpan_context_show(struct seq_file *file, void *offset) +{ + struct lowpan_iphc_ctx_table *t = file->private; + int i; + + seq_printf(file, "%3s|%-43s|%c\n", "cid", "prefix", 'C'); + seq_puts(file, "-------------------------------------------------\n"); + + spin_lock_bh(&t->lock); + for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++) { + if (!lowpan_iphc_ctx_is_active(&t->table[i])) + continue; + + seq_printf(file, "%3d|%39pI6c/%-3d|%d\n", t->table[i].id, + &t->table[i].pfx, t->table[i].plen, + lowpan_iphc_ctx_is_compression(&t->table[i])); + } + spin_unlock_bh(&t->lock); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(lowpan_context); + +static int lowpan_short_addr_get(void *data, u64 *val) +{ + struct wpan_dev *wdev = data; + + rtnl_lock(); + *val = le16_to_cpu(wdev->short_addr); + rtnl_unlock(); + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get, NULL, + "0x%04llx\n"); + +static void lowpan_dev_debugfs_802154_init(const struct net_device *dev, + struct lowpan_dev *ldev) +{ + struct dentry *root; + + if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154)) + return; + + root = debugfs_create_dir("ieee802154", ldev->iface_debugfs); + + debugfs_create_file("short_addr", 0444, root, + lowpan_802154_dev(dev)->wdev->ieee802154_ptr, + &lowpan_short_addr_fops); +} + +void lowpan_dev_debugfs_init(struct net_device *dev) +{ + struct lowpan_dev *ldev = lowpan_dev(dev); + struct dentry *contexts; + int i; + + /* creating the root */ + ldev->iface_debugfs = debugfs_create_dir(dev->name, lowpan_debugfs); + + contexts = debugfs_create_dir("contexts", ldev->iface_debugfs); + + debugfs_create_file("show", 0644, contexts, &lowpan_dev(dev)->ctx, + &lowpan_context_fops); + + for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++) + lowpan_dev_debugfs_ctx_init(dev, contexts, i); + + lowpan_dev_debugfs_802154_init(dev, ldev); +} + +void lowpan_dev_debugfs_exit(struct net_device *dev) +{ + debugfs_remove_recursive(lowpan_dev(dev)->iface_debugfs); +} + +void __init lowpan_debugfs_init(void) +{ + lowpan_debugfs = debugfs_create_dir("6lowpan", NULL); +} + +void lowpan_debugfs_exit(void) +{ + debugfs_remove_recursive(lowpan_debugfs); +} -- cgit v1.3.1