042671040d
Store the queue idx inside structure data_ring Store the entry idx inside structure data_entry This saves us a few calls to ARRAY_INDEX() which is now unused. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
552 lines
15 KiB
C
552 lines
15 KiB
C
/*
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Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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Module: rt2x00lib
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Abstract: rt2x00 debugfs specific routines.
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*/
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#include <linux/debugfs.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/poll.h>
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#include <linux/uaccess.h>
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#include "rt2x00.h"
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#include "rt2x00lib.h"
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#include "rt2x00dump.h"
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#define PRINT_LINE_LEN_MAX 32
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struct rt2x00debug_intf {
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/*
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* Pointer to driver structure where
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* this debugfs entry belongs to.
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*/
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struct rt2x00_dev *rt2x00dev;
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/*
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* Reference to the rt2x00debug structure
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* which can be used to communicate with
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* the registers.
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*/
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const struct rt2x00debug *debug;
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/*
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* Debugfs entries for:
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* - driver folder
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* - driver file
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* - chipset file
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* - device flags file
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* - register folder
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* - csr offset/value files
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* - eeprom offset/value files
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* - bbp offset/value files
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* - rf offset/value files
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* - frame dump folder
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* - frame dump file
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*/
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struct dentry *driver_folder;
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struct dentry *driver_entry;
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struct dentry *chipset_entry;
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struct dentry *dev_flags;
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struct dentry *register_folder;
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struct dentry *csr_off_entry;
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struct dentry *csr_val_entry;
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struct dentry *eeprom_off_entry;
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struct dentry *eeprom_val_entry;
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struct dentry *bbp_off_entry;
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struct dentry *bbp_val_entry;
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struct dentry *rf_off_entry;
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struct dentry *rf_val_entry;
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struct dentry *frame_folder;
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struct dentry *frame_dump_entry;
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/*
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* The frame dump file only allows a single reader,
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* so we need to store the current state here.
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*/
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unsigned long frame_dump_flags;
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#define FRAME_DUMP_FILE_OPEN 1
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/*
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* We queue each frame before dumping it to the user,
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* per read command we will pass a single skb structure
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* so we should be prepared to queue multiple sk buffers
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* before sending it to userspace.
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*/
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struct sk_buff_head frame_dump_skbqueue;
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wait_queue_head_t frame_dump_waitqueue;
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/*
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* Driver and chipset files will use a data buffer
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* that has been created in advance. This will simplify
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* the code since we can use the debugfs functions.
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*/
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struct debugfs_blob_wrapper driver_blob;
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struct debugfs_blob_wrapper chipset_blob;
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/*
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* Requested offset for each register type.
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*/
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unsigned int offset_csr;
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unsigned int offset_eeprom;
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unsigned int offset_bbp;
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unsigned int offset_rf;
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};
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void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
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struct sk_buff *skb)
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{
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struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
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struct skb_desc *desc = get_skb_desc(skb);
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struct sk_buff *skbcopy;
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struct rt2x00dump_hdr *dump_hdr;
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struct timeval timestamp;
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do_gettimeofday(×tamp);
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if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
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return;
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if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
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DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
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return;
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}
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skbcopy = alloc_skb(sizeof(*dump_hdr) + desc->desc_len + desc->data_len,
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GFP_ATOMIC);
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if (!skbcopy) {
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DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
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return;
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}
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dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
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dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
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dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
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dump_hdr->desc_length = cpu_to_le32(desc->desc_len);
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dump_hdr->data_length = cpu_to_le32(desc->data_len);
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dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
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dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
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dump_hdr->chip_rev = cpu_to_le32(rt2x00dev->chip.rev);
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dump_hdr->type = cpu_to_le16(desc->frame_type);
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dump_hdr->ring_index = desc->ring->queue_idx;
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dump_hdr->entry_index = desc->entry->entry_idx;
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dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
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dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
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memcpy(skb_put(skbcopy, desc->desc_len), desc->desc, desc->desc_len);
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memcpy(skb_put(skbcopy, desc->data_len), desc->data, desc->data_len);
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skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
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wake_up_interruptible(&intf->frame_dump_waitqueue);
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/*
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* Verify that the file has not been closed while we were working.
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*/
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if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
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skb_queue_purge(&intf->frame_dump_skbqueue);
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}
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static int rt2x00debug_file_open(struct inode *inode, struct file *file)
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{
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struct rt2x00debug_intf *intf = inode->i_private;
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file->private_data = inode->i_private;
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if (!try_module_get(intf->debug->owner))
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return -EBUSY;
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return 0;
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}
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static int rt2x00debug_file_release(struct inode *inode, struct file *file)
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{
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struct rt2x00debug_intf *intf = file->private_data;
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module_put(intf->debug->owner);
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return 0;
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}
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static int rt2x00debug_open_ring_dump(struct inode *inode, struct file *file)
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{
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struct rt2x00debug_intf *intf = inode->i_private;
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int retval;
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retval = rt2x00debug_file_open(inode, file);
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if (retval)
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return retval;
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if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
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rt2x00debug_file_release(inode, file);
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return -EBUSY;
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}
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return 0;
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}
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static int rt2x00debug_release_ring_dump(struct inode *inode, struct file *file)
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{
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struct rt2x00debug_intf *intf = inode->i_private;
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skb_queue_purge(&intf->frame_dump_skbqueue);
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clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
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return rt2x00debug_file_release(inode, file);
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}
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static ssize_t rt2x00debug_read_ring_dump(struct file *file,
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char __user *buf,
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size_t length,
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loff_t *offset)
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{
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struct rt2x00debug_intf *intf = file->private_data;
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struct sk_buff *skb;
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size_t status;
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int retval;
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if (file->f_flags & O_NONBLOCK)
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return -EAGAIN;
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retval =
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wait_event_interruptible(intf->frame_dump_waitqueue,
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(skb =
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skb_dequeue(&intf->frame_dump_skbqueue)));
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if (retval)
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return retval;
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status = min((size_t)skb->len, length);
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if (copy_to_user(buf, skb->data, status)) {
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status = -EFAULT;
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goto exit;
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}
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*offset += status;
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exit:
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kfree_skb(skb);
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return status;
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}
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static unsigned int rt2x00debug_poll_ring_dump(struct file *file,
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poll_table *wait)
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{
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struct rt2x00debug_intf *intf = file->private_data;
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poll_wait(file, &intf->frame_dump_waitqueue, wait);
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if (!skb_queue_empty(&intf->frame_dump_skbqueue))
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return POLLOUT | POLLWRNORM;
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return 0;
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}
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static const struct file_operations rt2x00debug_fop_ring_dump = {
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.owner = THIS_MODULE,
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.read = rt2x00debug_read_ring_dump,
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.poll = rt2x00debug_poll_ring_dump,
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.open = rt2x00debug_open_ring_dump,
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.release = rt2x00debug_release_ring_dump,
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};
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#define RT2X00DEBUGFS_OPS_READ(__name, __format, __type) \
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static ssize_t rt2x00debug_read_##__name(struct file *file, \
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char __user *buf, \
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size_t length, \
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loff_t *offset) \
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{ \
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struct rt2x00debug_intf *intf = file->private_data; \
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const struct rt2x00debug *debug = intf->debug; \
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char line[16]; \
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size_t size; \
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__type value; \
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\
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if (*offset) \
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return 0; \
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\
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if (intf->offset_##__name >= debug->__name.word_count) \
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return -EINVAL; \
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\
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debug->__name.read(intf->rt2x00dev, \
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intf->offset_##__name, &value); \
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\
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size = sprintf(line, __format, value); \
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\
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if (copy_to_user(buf, line, size)) \
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return -EFAULT; \
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\
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*offset += size; \
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return size; \
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}
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#define RT2X00DEBUGFS_OPS_WRITE(__name, __type) \
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static ssize_t rt2x00debug_write_##__name(struct file *file, \
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const char __user *buf,\
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size_t length, \
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loff_t *offset) \
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{ \
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struct rt2x00debug_intf *intf = file->private_data; \
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const struct rt2x00debug *debug = intf->debug; \
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char line[16]; \
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size_t size; \
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__type value; \
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\
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if (*offset) \
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return 0; \
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\
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if (!capable(CAP_NET_ADMIN)) \
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return -EPERM; \
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\
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if (intf->offset_##__name >= debug->__name.word_count) \
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return -EINVAL; \
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\
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if (copy_from_user(line, buf, length)) \
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return -EFAULT; \
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\
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size = strlen(line); \
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value = simple_strtoul(line, NULL, 0); \
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\
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debug->__name.write(intf->rt2x00dev, \
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intf->offset_##__name, value); \
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\
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*offset += size; \
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return size; \
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}
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#define RT2X00DEBUGFS_OPS(__name, __format, __type) \
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RT2X00DEBUGFS_OPS_READ(__name, __format, __type); \
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RT2X00DEBUGFS_OPS_WRITE(__name, __type); \
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\
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static const struct file_operations rt2x00debug_fop_##__name = {\
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.owner = THIS_MODULE, \
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.read = rt2x00debug_read_##__name, \
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.write = rt2x00debug_write_##__name, \
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.open = rt2x00debug_file_open, \
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.release = rt2x00debug_file_release, \
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};
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RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
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RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
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RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
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RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
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static ssize_t rt2x00debug_read_dev_flags(struct file *file,
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char __user *buf,
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size_t length,
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loff_t *offset)
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{
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struct rt2x00debug_intf *intf = file->private_data;
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char line[16];
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size_t size;
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if (*offset)
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return 0;
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size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
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if (copy_to_user(buf, line, size))
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return -EFAULT;
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*offset += size;
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return size;
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}
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static const struct file_operations rt2x00debug_fop_dev_flags = {
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.owner = THIS_MODULE,
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.read = rt2x00debug_read_dev_flags,
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.open = rt2x00debug_file_open,
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.release = rt2x00debug_file_release,
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};
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static struct dentry *rt2x00debug_create_file_driver(const char *name,
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struct rt2x00debug_intf
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*intf,
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struct debugfs_blob_wrapper
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*blob)
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{
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char *data;
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data = kzalloc(3 * PRINT_LINE_LEN_MAX, GFP_KERNEL);
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if (!data)
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return NULL;
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blob->data = data;
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data += sprintf(data, "driver: %s\n", intf->rt2x00dev->ops->name);
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data += sprintf(data, "version: %s\n", DRV_VERSION);
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data += sprintf(data, "compiled: %s %s\n", __DATE__, __TIME__);
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blob->size = strlen(blob->data);
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return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
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}
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static struct dentry *rt2x00debug_create_file_chipset(const char *name,
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struct rt2x00debug_intf
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*intf,
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struct
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debugfs_blob_wrapper
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*blob)
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{
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const struct rt2x00debug *debug = intf->debug;
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char *data;
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data = kzalloc(8 * PRINT_LINE_LEN_MAX, GFP_KERNEL);
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if (!data)
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return NULL;
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blob->data = data;
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data += sprintf(data, "rt chip: %04x\n", intf->rt2x00dev->chip.rt);
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data += sprintf(data, "rf chip: %04x\n", intf->rt2x00dev->chip.rf);
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data += sprintf(data, "revision:%08x\n", intf->rt2x00dev->chip.rev);
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data += sprintf(data, "\n");
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data += sprintf(data, "csr length: %d\n", debug->csr.word_count);
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data += sprintf(data, "eeprom length: %d\n", debug->eeprom.word_count);
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data += sprintf(data, "bbp length: %d\n", debug->bbp.word_count);
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data += sprintf(data, "rf length: %d\n", debug->rf.word_count);
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blob->size = strlen(blob->data);
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return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
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}
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void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
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{
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const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
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struct rt2x00debug_intf *intf;
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intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
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if (!intf) {
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ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
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return;
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}
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intf->debug = debug;
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intf->rt2x00dev = rt2x00dev;
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rt2x00dev->debugfs_intf = intf;
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intf->driver_folder =
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debugfs_create_dir(intf->rt2x00dev->ops->name,
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rt2x00dev->hw->wiphy->debugfsdir);
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if (IS_ERR(intf->driver_folder))
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goto exit;
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intf->driver_entry =
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rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
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if (IS_ERR(intf->driver_entry))
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goto exit;
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intf->chipset_entry =
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rt2x00debug_create_file_chipset("chipset",
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intf, &intf->chipset_blob);
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if (IS_ERR(intf->chipset_entry))
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goto exit;
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intf->dev_flags = debugfs_create_file("dev_flags", S_IRUGO,
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intf->driver_folder, intf,
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&rt2x00debug_fop_dev_flags);
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if (IS_ERR(intf->dev_flags))
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goto exit;
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intf->register_folder =
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debugfs_create_dir("register", intf->driver_folder);
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if (IS_ERR(intf->register_folder))
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goto exit;
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#define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \
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({ \
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(__intf)->__name##_off_entry = \
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debugfs_create_u32(__stringify(__name) "_offset", \
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S_IRUGO | S_IWUSR, \
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(__intf)->register_folder, \
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&(__intf)->offset_##__name); \
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if (IS_ERR((__intf)->__name##_off_entry)) \
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goto exit; \
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\
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(__intf)->__name##_val_entry = \
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debugfs_create_file(__stringify(__name) "_value", \
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S_IRUGO | S_IWUSR, \
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(__intf)->register_folder, \
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(__intf), &rt2x00debug_fop_##__name);\
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if (IS_ERR((__intf)->__name##_val_entry)) \
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goto exit; \
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})
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RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
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RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
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RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
|
|
RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
|
|
|
|
#undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
|
|
|
|
intf->frame_folder =
|
|
debugfs_create_dir("frame", intf->driver_folder);
|
|
if (IS_ERR(intf->frame_folder))
|
|
goto exit;
|
|
|
|
intf->frame_dump_entry =
|
|
debugfs_create_file("dump", S_IRUGO, intf->frame_folder,
|
|
intf, &rt2x00debug_fop_ring_dump);
|
|
if (IS_ERR(intf->frame_dump_entry))
|
|
goto exit;
|
|
|
|
skb_queue_head_init(&intf->frame_dump_skbqueue);
|
|
init_waitqueue_head(&intf->frame_dump_waitqueue);
|
|
|
|
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);
|
|
|
|
debugfs_remove(intf->frame_dump_entry);
|
|
debugfs_remove(intf->frame_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;
|
|
}
|