/* Copyright (C) 2004 - 2008 rt2x00 SourceForge Project <http://rt2x00.serialmonkey.com> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Module: rt2x00lib Abstract: rt2x00 debugfs specific routines. */ #include <linux/debugfs.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/poll.h> #include <linux/uaccess.h> #include "rt2x00.h" #include "rt2x00lib.h" #include "rt2x00dump.h" #define MAX_LINE_LENGTH 64 struct rt2x00debug_crypto { unsigned long success; unsigned long icv_error; unsigned long mic_error; unsigned long key_error; }; struct rt2x00debug_intf { /* * Pointer to driver structure where * this debugfs entry belongs to. */ struct rt2x00_dev *rt2x00dev; /* * Reference to the rt2x00debug structure * which can be used to communicate with * the registers. */ const struct rt2x00debug *debug; /* * Debugfs entries for: * - driver folder * - driver file * - chipset file * - device flags file * - register folder * - csr offset/value files * - eeprom offset/value files * - bbp offset/value files * - rf offset/value files * - queue folder * - frame dump file * - queue stats file * - crypto stats file */ struct dentry *driver_folder; struct dentry *driver_entry; struct dentry *chipset_entry; struct dentry *dev_flags; struct dentry *register_folder; struct dentry *csr_off_entry; struct dentry *csr_val_entry; struct dentry *eeprom_off_entry; struct dentry *eeprom_val_entry; struct dentry *bbp_off_entry; struct dentry *bbp_val_entry; struct dentry *rf_off_entry; struct dentry *rf_val_entry; struct dentry *queue_folder; struct dentry *queue_frame_dump_entry; struct dentry *queue_stats_entry; struct dentry *crypto_stats_entry; /* * The frame dump file only allows a single reader, * so we need to store the current state here. */ unsigned long frame_dump_flags; #define FRAME_DUMP_FILE_OPEN 1 /* * We queue each frame before dumping it to the user, * per read command we will pass a single skb structure * so we should be prepared to queue multiple sk buffers * before sending it to userspace. */ struct sk_buff_head frame_dump_skbqueue; wait_queue_head_t frame_dump_waitqueue; /* * HW crypto statistics. * All statistics are stored seperately per cipher type. */ struct rt2x00debug_crypto crypto_stats[CIPHER_MAX]; /* * Driver and chipset files will use a data buffer * that has been created in advance. This will simplify * the code since we can use the debugfs functions. */ struct debugfs_blob_wrapper driver_blob; struct debugfs_blob_wrapper chipset_blob; /* * Requested offset for each register type. */ unsigned int offset_csr; unsigned int offset_eeprom; unsigned int offset_bbp; unsigned int offset_rf; }; void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev, enum cipher cipher, enum rx_crypto status) { struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf; if (cipher == CIPHER_TKIP_NO_MIC) cipher = CIPHER_TKIP; if (cipher == CIPHER_NONE || cipher > CIPHER_MAX) return; /* Remove CIPHER_NONE index */ cipher--; intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS); intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV); intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC); intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY); } void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev, enum rt2x00_dump_type type, struct sk_buff *skb) { struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf; struct skb_frame_desc *desc = get_skb_frame_desc(skb); struct sk_buff *skbcopy; struct rt2x00dump_hdr *dump_hdr; struct timeval timestamp; do_gettimeofday(×tamp); if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) return; if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) { DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n"); return; } skbcopy = alloc_skb(sizeof(*dump_hdr) + desc->desc_len + skb->len, GFP_ATOMIC); if (!skbcopy) { DEBUG(rt2x00dev, "Failed to copy skb for dump.\n"); return; } dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr)); dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION); dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr)); dump_hdr->desc_length = cpu_to_le32(desc->desc_len); dump_hdr->data_length = cpu_to_le32(skb->len); dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt); dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf); dump_hdr->chip_rev = cpu_to_le32(rt2x00dev->chip.rev); dump_hdr->type = cpu_to_le16(type); dump_hdr->queue_index = desc->entry->queue->qid; dump_hdr->entry_index = desc->entry->entry_idx; dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec); dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec); memcpy(skb_put(skbcopy, desc->desc_len), desc->desc, desc->desc_len); memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len); skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy); wake_up_interruptible(&intf->frame_dump_waitqueue); /* * Verify that the file has not been closed while we were working. */ if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) skb_queue_purge(&intf->frame_dump_skbqueue); } static int rt2x00debug_file_open(struct inode *inode, struct file *file) { struct rt2x00debug_intf *intf = inode->i_private; file->private_data = inode->i_private; if (!try_module_get(intf->debug->owner)) return -EBUSY; return 0; } static int rt2x00debug_file_release(struct inode *inode, struct file *file) { struct rt2x00debug_intf *intf = file->private_data; module_put(intf->debug->owner); return 0; } static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file) { struct rt2x00debug_intf *intf = inode->i_private; int retval; retval = rt2x00debug_file_open(inode, file); if (retval) return retval; if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) { rt2x00debug_file_release(inode, file); return -EBUSY; } return 0; } static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file) { struct rt2x00debug_intf *intf = inode->i_private; skb_queue_purge(&intf->frame_dump_skbqueue); clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags); return rt2x00debug_file_release(inode, file); } static ssize_t rt2x00debug_read_queue_dump(struct file *file, char __user *buf, size_t length, loff_t *offset) { struct rt2x00debug_intf *intf = file->private_data; struct sk_buff *skb; size_t status; int retval; if (file->f_flags & O_NONBLOCK) return -EAGAIN; retval = wait_event_interruptible(intf->frame_dump_waitqueue, (skb = skb_dequeue(&intf->frame_dump_skbqueue))); if (retval) return retval; status = min((size_t)skb->len, length); if (copy_to_user(buf, skb->data, status)) { status = -EFAULT; goto exit; } *offset += status; exit: kfree_skb(skb); return status; } static unsigned int rt2x00debug_poll_queue_dump(struct file *file, poll_table *wait) { struct rt2x00debug_intf *intf = file->private_data; poll_wait(file, &intf->frame_dump_waitqueue, wait); if (!skb_queue_empty(&intf->frame_dump_skbqueue)) return POLLOUT | POLLWRNORM; return 0; } static const struct file_operations rt2x00debug_fop_queue_dump = { .owner = THIS_MODULE, .read = rt2x00debug_read_queue_dump, .poll = rt2x00debug_poll_queue_dump, .open = rt2x00debug_open_queue_dump, .release = rt2x00debug_release_queue_dump, }; static ssize_t rt2x00debug_read_queue_stats(struct file *file, char __user *buf, size_t length, loff_t *offset) { struct rt2x00debug_intf *intf = file->private_data; struct data_queue *queue; unsigned long irqflags; unsigned int lines = 1 + intf->rt2x00dev->data_queues; size_t size; char *data; char *temp; if (*offset) return 0; data = kzalloc(lines * MAX_LINE_LENGTH, GFP_KERNEL); if (!data) return -ENOMEM; temp = data + sprintf(data, "qid\tcount\tlimit\tlength\tindex\tdone\tcrypto\n"); queue_for_each(intf->rt2x00dev, queue) { spin_lock_irqsave(&queue->lock, irqflags); temp += sprintf(temp, "%d\t%d\t%d\t%d\t%d\t%d\t%d\n", queue->qid, queue->count, queue->limit, queue->length, queue->index[Q_INDEX], queue->index[Q_INDEX_DONE], queue->index[Q_INDEX_CRYPTO]); spin_unlock_irqrestore(&queue->lock, irqflags); } size = strlen(data); size = min(size, length); if (copy_to_user(buf, data, size)) { kfree(data); return -EFAULT; } kfree(data); *offset += size; return size; } static const struct file_operations rt2x00debug_fop_queue_stats = { .owner = THIS_MODULE, .read = rt2x00debug_read_queue_stats, .open = rt2x00debug_file_open, .release = rt2x00debug_file_release, }; #ifdef CONFIG_RT2X00_LIB_CRYPTO static ssize_t rt2x00debug_read_crypto_stats(struct file *file, char __user *buf, size_t length, loff_t *offset) { struct rt2x00debug_intf *intf = file->private_data; char *name[] = { "WEP64", "WEP128", "TKIP", "AES" }; char *data; char *temp; size_t size; unsigned int i; if (*offset) return 0; data = kzalloc((1 + CIPHER_MAX)* MAX_LINE_LENGTH, GFP_KERNEL); if (!data) return -ENOMEM; temp = data; temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n"); for (i = 0; i < CIPHER_MAX; i++) { temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i], intf->crypto_stats[i].success, intf->crypto_stats[i].icv_error, intf->crypto_stats[i].mic_error, intf->crypto_stats[i].key_error); } size = strlen(data); size = min(size, length); if (copy_to_user(buf, data, size)) { kfree(data); return -EFAULT; } kfree(data); *offset += size; return size; } static const struct file_operations rt2x00debug_fop_crypto_stats = { .owner = THIS_MODULE, .read = rt2x00debug_read_crypto_stats, .open = rt2x00debug_file_open, .release = rt2x00debug_file_release, }; #endif #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type) \ static ssize_t rt2x00debug_read_##__name(struct file *file, \ char __user *buf, \ size_t length, \ loff_t *offset) \ { \ struct rt2x00debug_intf *intf = file->private_data; \ const struct rt2x00debug *debug = intf->debug; \ char line[16]; \ size_t size; \ __type value; \ \ if (*offset) \ return 0; \ \ if (intf->offset_##__name >= debug->__name.word_count) \ return -EINVAL; \ \ debug->__name.read(intf->rt2x00dev, \ intf->offset_##__name, &value); \ \ size = sprintf(line, __format, value); \ \ if (copy_to_user(buf, line, size)) \ return -EFAULT; \ \ *offset += size; \ return size; \ } #define RT2X00DEBUGFS_OPS_WRITE(__name, __type) \ static ssize_t rt2x00debug_write_##__name(struct file *file, \ const char __user *buf,\ size_t length, \ loff_t *offset) \ { \ struct rt2x00debug_intf *intf = file->private_data; \ const struct rt2x00debug *debug = intf->debug; \ char line[16]; \ size_t size; \ __type value; \ \ if (*offset) \ return 0; \ \ if (intf->offset_##__name >= debug->__name.word_count) \ return -EINVAL; \ \ if (copy_from_user(line, buf, length)) \ return -EFAULT; \ \ size = strlen(line); \ value = simple_strtoul(line, NULL, 0); \ \ debug->__name.write(intf->rt2x00dev, \ intf->offset_##__name, value); \ \ *offset += size; \ return size; \ } #define RT2X00DEBUGFS_OPS(__name, __format, __type) \ RT2X00DEBUGFS_OPS_READ(__name, __format, __type); \ RT2X00DEBUGFS_OPS_WRITE(__name, __type); \ \ static const struct file_operations rt2x00debug_fop_##__name = {\ .owner = THIS_MODULE, \ .read = rt2x00debug_read_##__name, \ .write = rt2x00debug_write_##__name, \ .open = rt2x00debug_file_open, \ .release = rt2x00debug_file_release, \ }; RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32); RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16); RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8); RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32); static ssize_t rt2x00debug_read_dev_flags(struct file *file, char __user *buf, size_t length, loff_t *offset) { struct rt2x00debug_intf *intf = file->private_data; char line[16]; size_t size; if (*offset) return 0; size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags); if (copy_to_user(buf, line, size)) return -EFAULT; *offset += size; return size; } static const struct file_operations rt2x00debug_fop_dev_flags = { .owner = THIS_MODULE, .read = rt2x00debug_read_dev_flags, .open = rt2x00debug_file_open, .release = rt2x00debug_file_release, }; static struct dentry *rt2x00debug_create_file_driver(const char *name, struct rt2x00debug_intf *intf, struct debugfs_blob_wrapper *blob) { char *data; data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL); if (!data) return NULL; blob->data = data; data += sprintf(data, "driver: %s\n", intf->rt2x00dev->ops->name); data += sprintf(data, "version: %s\n", DRV_VERSION); data += sprintf(data, "compiled: %s %s\n", __DATE__, __TIME__); blob->size = strlen(blob->data); return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob); } static struct dentry *rt2x00debug_create_file_chipset(const char *name, struct rt2x00debug_intf *intf, struct debugfs_blob_wrapper *blob) { const struct rt2x00debug *debug = intf->debug; char *data; data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL); if (!data) return NULL; blob->data = data; data += sprintf(data, "rt chip: %04x\n", intf->rt2x00dev->chip.rt); data += sprintf(data, "rf chip: %04x\n", intf->rt2x00dev->chip.rf); data += sprintf(data, "revision:%08x\n", intf->rt2x00dev->chip.rev); data += sprintf(data, "\n"); data += sprintf(data, "csr length: %d\n", debug->csr.word_count); data += sprintf(data, "eeprom length: %d\n", debug->eeprom.word_count); data += sprintf(data, "bbp length: %d\n", debug->bbp.word_count); data += sprintf(data, "rf length: %d\n", debug->rf.word_count); blob->size = strlen(blob->data); return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob); } void rt2x00debug_register(struct rt2x00_dev *rt2x00dev) { const struct rt2x00debug *debug = rt2x00dev->ops->debugfs; struct rt2x00debug_intf *intf; intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL); if (!intf) { ERROR(rt2x00dev, "Failed to allocate debug handler.\n"); return; } intf->debug = debug; intf->rt2x00dev = rt2x00dev; rt2x00dev->debugfs_intf = intf; intf->driver_folder = debugfs_create_dir(intf->rt2x00dev->ops->name, rt2x00dev->hw->wiphy->debugfsdir); if (IS_ERR(intf->driver_folder)) goto exit; intf->driver_entry = rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob); if (IS_ERR(intf->driver_entry)) goto exit; intf->chipset_entry = rt2x00debug_create_file_chipset("chipset", intf, &intf->chipset_blob); if (IS_ERR(intf->chipset_entry)) goto exit; intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR, intf->driver_folder, intf, &rt2x00debug_fop_dev_flags); if (IS_ERR(intf->dev_flags)) goto exit; intf->register_folder = debugfs_create_dir("register", intf->driver_folder); if (IS_ERR(intf->register_folder)) goto exit; #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \ ({ \ (__intf)->__name##_off_entry = \ debugfs_create_u32(__stringify(__name) "_offset", \ S_IRUSR | S_IWUSR, \ (__intf)->register_folder, \ &(__intf)->offset_##__name); \ if (IS_ERR((__intf)->__name##_off_entry)) \ goto exit; \ \ (__intf)->__name##_val_entry = \ debugfs_create_file(__stringify(__name) "_value", \ S_IRUSR | S_IWUSR, \ (__intf)->register_folder, \ (__intf), &rt2x00debug_fop_##__name);\ if (IS_ERR((__intf)->__name##_val_entry)) \ goto exit; \ }) RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr); RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom); RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp); RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf); #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY intf->queue_folder = debugfs_create_dir("queue", intf->driver_folder); if (IS_ERR(intf->queue_folder)) goto exit; intf->queue_frame_dump_entry = debugfs_create_file("dump", S_IRUSR, intf->queue_folder, intf, &rt2x00debug_fop_queue_dump); if (IS_ERR(intf->queue_frame_dump_entry)) goto exit; skb_queue_head_init(&intf->frame_dump_skbqueue); init_waitqueue_head(&intf->frame_dump_waitqueue); intf->queue_stats_entry = debugfs_create_file("queue", S_IRUSR, intf->queue_folder, intf, &rt2x00debug_fop_queue_stats); #ifdef CONFIG_RT2X00_LIB_CRYPTO if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags)) intf->crypto_stats_entry = debugfs_create_file("crypto", S_IRUGO, intf->queue_folder, intf, &rt2x00debug_fop_crypto_stats); #endif return; exit: rt2x00debug_deregister(rt2x00dev); ERROR(rt2x00dev, "Failed to register debug handler.\n"); return; } void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev) { struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf; if (unlikely(!intf)) return; skb_queue_purge(&intf->frame_dump_skbqueue); #ifdef CONFIG_RT2X00_LIB_CRYPTO debugfs_remove(intf->crypto_stats_entry); #endif debugfs_remove(intf->queue_stats_entry); debugfs_remove(intf->queue_frame_dump_entry); debugfs_remove(intf->queue_folder); debugfs_remove(intf->rf_val_entry); debugfs_remove(intf->rf_off_entry); debugfs_remove(intf->bbp_val_entry); debugfs_remove(intf->bbp_off_entry); debugfs_remove(intf->eeprom_val_entry); debugfs_remove(intf->eeprom_off_entry); debugfs_remove(intf->csr_val_entry); debugfs_remove(intf->csr_off_entry); debugfs_remove(intf->register_folder); debugfs_remove(intf->dev_flags); debugfs_remove(intf->chipset_entry); debugfs_remove(intf->driver_entry); debugfs_remove(intf->driver_folder); kfree(intf->chipset_blob.data); kfree(intf->driver_blob.data); kfree(intf); rt2x00dev->debugfs_intf = NULL; }