500 lines
13 KiB
C
500 lines
13 KiB
C
/*
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Broadcom BCM43xx wireless driver
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debugfs driver debugging code
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Copyright (c) 2005 Michael Buesch <mbuesch@freenet.de>
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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; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <linux/fs.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <linux/netdevice.h>
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#include <linux/pci.h>
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#include <asm/io.h>
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#include "bcm43xx.h"
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#include "bcm43xx_main.h"
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#include "bcm43xx_debugfs.h"
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#include "bcm43xx_dma.h"
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#include "bcm43xx_pio.h"
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#include "bcm43xx_xmit.h"
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#define REALLY_BIG_BUFFER_SIZE (1024*256)
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static struct bcm43xx_debugfs fs;
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static char really_big_buffer[REALLY_BIG_BUFFER_SIZE];
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static DECLARE_MUTEX(big_buffer_sem);
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static ssize_t write_file_dummy(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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return count;
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}
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static int open_file_generic(struct inode *inode, struct file *file)
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{
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file->private_data = inode->u.generic_ip;
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return 0;
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}
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#define fappend(fmt, x...) pos += snprintf(buf + pos, len - pos, fmt , ##x)
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static ssize_t devinfo_read_file(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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const size_t len = REALLY_BIG_BUFFER_SIZE;
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struct bcm43xx_private *bcm = file->private_data;
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char *buf = really_big_buffer;
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size_t pos = 0;
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ssize_t res;
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struct net_device *net_dev;
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struct pci_dev *pci_dev;
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unsigned long flags;
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u16 tmp16;
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int i;
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down(&big_buffer_sem);
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bcm43xx_lock_mmio(bcm, flags);
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if (!bcm->initialized) {
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fappend("Board not initialized.\n");
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goto out;
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}
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net_dev = bcm->net_dev;
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pci_dev = bcm->pci_dev;
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/* This is where the information is written to the "devinfo" file */
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fappend("*** %s devinfo ***\n", net_dev->name);
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fappend("vendor: 0x%04x device: 0x%04x\n",
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pci_dev->vendor, pci_dev->device);
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fappend("subsystem_vendor: 0x%04x subsystem_device: 0x%04x\n",
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pci_dev->subsystem_vendor, pci_dev->subsystem_device);
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fappend("IRQ: %d\n", bcm->irq);
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fappend("mmio_addr: 0x%p\n", bcm->mmio_addr);
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fappend("chip_id: 0x%04x chip_rev: 0x%02x\n", bcm->chip_id, bcm->chip_rev);
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if ((bcm->core_80211[0].rev >= 3) && (bcm43xx_read32(bcm, 0x0158) & (1 << 16)))
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fappend("Radio disabled by hardware!\n");
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if ((bcm->core_80211[0].rev < 3) && !(bcm43xx_read16(bcm, 0x049A) & (1 << 4)))
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fappend("Radio disabled by hardware!\n");
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fappend("board_vendor: 0x%04x board_type: 0x%04x\n", bcm->board_vendor,
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bcm->board_type);
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fappend("\nCores:\n");
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#define fappend_core(name, info) fappend("core \"" name "\" %s, %s, id: 0x%04x, " \
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"rev: 0x%02x, index: 0x%02x\n", \
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(info).available \
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? "available" : "nonavailable", \
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(info).enabled \
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? "enabled" : "disabled", \
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(info).id, (info).rev, (info).index)
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fappend_core("CHIPCOMMON", bcm->core_chipcommon);
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fappend_core("PCI", bcm->core_pci);
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fappend_core("first 80211", bcm->core_80211[0]);
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fappend_core("second 80211", bcm->core_80211[1]);
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#undef fappend_core
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tmp16 = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
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fappend("LEDs: ");
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for (i = 0; i < BCM43xx_NR_LEDS; i++)
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fappend("%d ", !!(tmp16 & (1 << i)));
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fappend("\n");
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out:
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bcm43xx_unlock_mmio(bcm, flags);
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res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
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up(&big_buffer_sem);
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return res;
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}
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static ssize_t drvinfo_read_file(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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const size_t len = REALLY_BIG_BUFFER_SIZE;
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char *buf = really_big_buffer;
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size_t pos = 0;
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ssize_t res;
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down(&big_buffer_sem);
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/* This is where the information is written to the "driver" file */
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fappend(KBUILD_MODNAME " driver\n");
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fappend("Compiled at: %s %s\n", __DATE__, __TIME__);
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res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
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up(&big_buffer_sem);
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return res;
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}
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static ssize_t spromdump_read_file(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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const size_t len = REALLY_BIG_BUFFER_SIZE;
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struct bcm43xx_private *bcm = file->private_data;
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char *buf = really_big_buffer;
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size_t pos = 0;
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ssize_t res;
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unsigned long flags;
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down(&big_buffer_sem);
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bcm43xx_lock_mmio(bcm, flags);
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if (!bcm->initialized) {
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fappend("Board not initialized.\n");
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goto out;
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}
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/* This is where the information is written to the "sprom_dump" file */
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fappend("boardflags: 0x%04x\n", bcm->sprom.boardflags);
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out:
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bcm43xx_unlock_mmio(bcm, flags);
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res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
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up(&big_buffer_sem);
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return res;
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}
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static ssize_t tsf_read_file(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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const size_t len = REALLY_BIG_BUFFER_SIZE;
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struct bcm43xx_private *bcm = file->private_data;
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char *buf = really_big_buffer;
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size_t pos = 0;
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ssize_t res;
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unsigned long flags;
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u64 tsf;
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down(&big_buffer_sem);
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bcm43xx_lock_mmio(bcm, flags);
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if (!bcm->initialized) {
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fappend("Board not initialized.\n");
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goto out;
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}
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bcm43xx_tsf_read(bcm, &tsf);
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fappend("0x%08x%08x\n",
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(unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
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(unsigned int)(tsf & 0xFFFFFFFFULL));
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out:
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bcm43xx_unlock_mmio(bcm, flags);
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res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
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up(&big_buffer_sem);
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return res;
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}
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static ssize_t tsf_write_file(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct bcm43xx_private *bcm = file->private_data;
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char *buf = really_big_buffer;
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ssize_t buf_size;
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ssize_t res;
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unsigned long flags;
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u64 tsf;
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buf_size = min(count, sizeof (really_big_buffer) - 1);
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down(&big_buffer_sem);
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if (copy_from_user(buf, user_buf, buf_size)) {
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res = -EFAULT;
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goto out_up;
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}
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bcm43xx_lock_mmio(bcm, flags);
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if (!bcm->initialized) {
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printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
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res = -EFAULT;
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goto out_unlock;
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}
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if (sscanf(buf, "%lli", &tsf) != 1) {
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printk(KERN_INFO PFX "debugfs: invalid values for \"tsf\"\n");
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res = -EINVAL;
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goto out_unlock;
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}
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bcm43xx_tsf_write(bcm, tsf);
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res = buf_size;
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out_unlock:
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bcm43xx_unlock_mmio(bcm, flags);
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out_up:
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up(&big_buffer_sem);
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return res;
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}
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static ssize_t txstat_read_file(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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const size_t len = REALLY_BIG_BUFFER_SIZE;
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struct bcm43xx_private *bcm = file->private_data;
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char *buf = really_big_buffer;
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size_t pos = 0;
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ssize_t res;
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unsigned long flags;
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struct bcm43xx_dfsentry *e;
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struct bcm43xx_xmitstatus *status;
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int i, cnt, j = 0;
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down(&big_buffer_sem);
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bcm43xx_lock(bcm, flags);
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fappend("Last %d logged xmitstatus blobs (Latest first):\n\n",
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BCM43xx_NR_LOGGED_XMITSTATUS);
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e = bcm->dfsentry;
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if (e->xmitstatus_printing == 0) {
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/* At the beginning, make a copy of all data to avoid
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* concurrency, as this function is called multiple
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* times for big logs. Without copying, the data might
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* change between reads. This would result in total trash.
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*/
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e->xmitstatus_printing = 1;
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e->saved_xmitstatus_ptr = e->xmitstatus_ptr;
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e->saved_xmitstatus_cnt = e->xmitstatus_cnt;
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memcpy(e->xmitstatus_print_buffer, e->xmitstatus_buffer,
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BCM43xx_NR_LOGGED_XMITSTATUS * sizeof(*(e->xmitstatus_buffer)));
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}
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i = e->saved_xmitstatus_ptr - 1;
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if (i < 0)
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i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
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cnt = e->saved_xmitstatus_cnt;
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while (cnt) {
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status = e->xmitstatus_print_buffer + i;
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fappend("0x%02x: cookie: 0x%04x, flags: 0x%02x, "
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"cnt1: 0x%02x, cnt2: 0x%02x, seq: 0x%04x, "
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"unk: 0x%04x\n", j,
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status->cookie, status->flags,
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status->cnt1, status->cnt2, status->seq,
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status->unknown);
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j++;
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cnt--;
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i--;
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if (i < 0)
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i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
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}
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bcm43xx_unlock(bcm, flags);
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res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
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bcm43xx_lock(bcm, flags);
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if (*ppos == pos) {
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/* Done. Drop the copied data. */
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e->xmitstatus_printing = 0;
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}
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bcm43xx_unlock(bcm, flags);
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up(&big_buffer_sem);
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return res;
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}
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#undef fappend
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static struct file_operations devinfo_fops = {
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.read = devinfo_read_file,
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.write = write_file_dummy,
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.open = open_file_generic,
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};
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static struct file_operations spromdump_fops = {
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.read = spromdump_read_file,
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.write = write_file_dummy,
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.open = open_file_generic,
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};
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static struct file_operations drvinfo_fops = {
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.read = drvinfo_read_file,
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.write = write_file_dummy,
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.open = open_file_generic,
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};
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static struct file_operations tsf_fops = {
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.read = tsf_read_file,
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.write = tsf_write_file,
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.open = open_file_generic,
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};
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static struct file_operations txstat_fops = {
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.read = txstat_read_file,
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.write = write_file_dummy,
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.open = open_file_generic,
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};
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void bcm43xx_debugfs_add_device(struct bcm43xx_private *bcm)
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{
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struct bcm43xx_dfsentry *e;
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char devdir[IFNAMSIZ];
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assert(bcm);
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e = kzalloc(sizeof(*e), GFP_KERNEL);
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if (!e) {
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printk(KERN_ERR PFX "out of memory\n");
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return;
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}
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e->bcm = bcm;
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e->xmitstatus_buffer = kzalloc(BCM43xx_NR_LOGGED_XMITSTATUS
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* sizeof(*(e->xmitstatus_buffer)),
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GFP_KERNEL);
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if (!e->xmitstatus_buffer) {
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printk(KERN_ERR PFX "out of memory\n");
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kfree(e);
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return;
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}
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e->xmitstatus_print_buffer = kzalloc(BCM43xx_NR_LOGGED_XMITSTATUS
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* sizeof(*(e->xmitstatus_buffer)),
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GFP_KERNEL);
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if (!e->xmitstatus_print_buffer) {
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printk(KERN_ERR PFX "out of memory\n");
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kfree(e);
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return;
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}
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bcm->dfsentry = e;
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strncpy(devdir, bcm->net_dev->name, ARRAY_SIZE(devdir));
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e->subdir = debugfs_create_dir(devdir, fs.root);
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e->dentry_devinfo = debugfs_create_file("devinfo", 0444, e->subdir,
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bcm, &devinfo_fops);
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if (!e->dentry_devinfo)
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printk(KERN_ERR PFX "debugfs: creating \"devinfo\" for \"%s\" failed!\n", devdir);
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e->dentry_spromdump = debugfs_create_file("sprom_dump", 0444, e->subdir,
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bcm, &spromdump_fops);
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if (!e->dentry_spromdump)
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printk(KERN_ERR PFX "debugfs: creating \"sprom_dump\" for \"%s\" failed!\n", devdir);
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e->dentry_tsf = debugfs_create_file("tsf", 0666, e->subdir,
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bcm, &tsf_fops);
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if (!e->dentry_tsf)
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printk(KERN_ERR PFX "debugfs: creating \"tsf\" for \"%s\" failed!\n", devdir);
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e->dentry_txstat = debugfs_create_file("tx_status", 0444, e->subdir,
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bcm, &txstat_fops);
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if (!e->dentry_txstat)
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printk(KERN_ERR PFX "debugfs: creating \"tx_status\" for \"%s\" failed!\n", devdir);
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}
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void bcm43xx_debugfs_remove_device(struct bcm43xx_private *bcm)
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{
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struct bcm43xx_dfsentry *e;
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if (!bcm)
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return;
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e = bcm->dfsentry;
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assert(e);
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debugfs_remove(e->dentry_spromdump);
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debugfs_remove(e->dentry_devinfo);
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debugfs_remove(e->dentry_tsf);
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debugfs_remove(e->dentry_txstat);
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debugfs_remove(e->subdir);
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kfree(e->xmitstatus_buffer);
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kfree(e->xmitstatus_print_buffer);
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kfree(e);
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}
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void bcm43xx_debugfs_log_txstat(struct bcm43xx_private *bcm,
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struct bcm43xx_xmitstatus *status)
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{
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struct bcm43xx_dfsentry *e;
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struct bcm43xx_xmitstatus *savedstatus;
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/* This is protected by bcm->_lock */
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e = bcm->dfsentry;
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assert(e);
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savedstatus = e->xmitstatus_buffer + e->xmitstatus_ptr;
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memcpy(savedstatus, status, sizeof(*status));
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e->xmitstatus_ptr++;
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if (e->xmitstatus_ptr >= BCM43xx_NR_LOGGED_XMITSTATUS)
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e->xmitstatus_ptr = 0;
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if (e->xmitstatus_cnt < BCM43xx_NR_LOGGED_XMITSTATUS)
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e->xmitstatus_cnt++;
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}
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void bcm43xx_debugfs_init(void)
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{
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memset(&fs, 0, sizeof(fs));
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fs.root = debugfs_create_dir(KBUILD_MODNAME, NULL);
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if (!fs.root)
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printk(KERN_ERR PFX "debugfs: creating \"" KBUILD_MODNAME "\" subdir failed!\n");
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fs.dentry_driverinfo = debugfs_create_file("driver", 0444, fs.root, NULL, &drvinfo_fops);
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if (!fs.dentry_driverinfo)
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printk(KERN_ERR PFX "debugfs: creating \"" KBUILD_MODNAME "/driver\" failed!\n");
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}
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void bcm43xx_debugfs_exit(void)
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{
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debugfs_remove(fs.dentry_driverinfo);
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debugfs_remove(fs.root);
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}
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void bcm43xx_printk_dump(const char *data,
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size_t size,
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const char *description)
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{
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size_t i;
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char c;
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printk(KERN_INFO PFX "Data dump (%s, %zd bytes):",
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description, size);
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for (i = 0; i < size; i++) {
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c = data[i];
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if (i % 8 == 0)
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printk("\n" KERN_INFO PFX "0x%08zx: 0x%02x, ", i, c & 0xff);
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else
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printk("0x%02x, ", c & 0xff);
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}
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printk("\n");
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}
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void bcm43xx_printk_bitdump(const unsigned char *data,
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size_t bytes, int msb_to_lsb,
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const char *description)
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{
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size_t i;
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int j;
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const unsigned char *d;
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printk(KERN_INFO PFX "*** Bitdump (%s, %zd bytes, %s) ***",
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description, bytes, msb_to_lsb ? "MSB to LSB" : "LSB to MSB");
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|
for (i = 0; i < bytes; i++) {
|
|
d = data + i;
|
|
if (i % 8 == 0)
|
|
printk("\n" KERN_INFO PFX "0x%08zx: ", i);
|
|
if (msb_to_lsb) {
|
|
for (j = 7; j >= 0; j--) {
|
|
if (*d & (1 << j))
|
|
printk("1");
|
|
else
|
|
printk("0");
|
|
}
|
|
} else {
|
|
for (j = 0; j < 8; j++) {
|
|
if (*d & (1 << j))
|
|
printk("1");
|
|
else
|
|
printk("0");
|
|
}
|
|
}
|
|
printk(" ");
|
|
}
|
|
printk("\n");
|
|
}
|