diff options
Diffstat (limited to 'drivers/net/wireless/broadcom/b43/debugfs.c')
| -rw-r--r-- | drivers/net/wireless/broadcom/b43/debugfs.c | 795 |
1 files changed, 795 insertions, 0 deletions
diff --git a/drivers/net/wireless/broadcom/b43/debugfs.c b/drivers/net/wireless/broadcom/b43/debugfs.c new file mode 100644 index 000000000..89a25aefb --- /dev/null +++ b/drivers/net/wireless/broadcom/b43/debugfs.c @@ -0,0 +1,795 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + + Broadcom B43 wireless driver + + debugfs driver debugging code + + Copyright (c) 2005-2007 Michael Buesch <m@bues.ch> + + +*/ + +#include <linux/fs.h> +#include <linux/debugfs.h> +#include <linux/slab.h> +#include <linux/netdevice.h> +#include <linux/pci.h> +#include <linux/mutex.h> + +#include "b43.h" +#include "main.h" +#include "debugfs.h" +#include "dma.h" +#include "xmit.h" + + +/* The root directory. */ +static struct dentry *rootdir; + +struct b43_debugfs_fops { + ssize_t (*read)(struct b43_wldev *dev, char *buf, size_t bufsize); + int (*write)(struct b43_wldev *dev, const char *buf, size_t count); + struct file_operations fops; + /* Offset of struct b43_dfs_file in struct b43_dfsentry */ + size_t file_struct_offset; +}; + +static inline +struct b43_dfs_file *fops_to_dfs_file(struct b43_wldev *dev, + const struct b43_debugfs_fops *dfops) +{ + void *p; + + p = dev->dfsentry; + p += dfops->file_struct_offset; + + return p; +} + + +#define fappend(fmt, x...) \ + do { \ + if (bufsize - count) \ + count += scnprintf(buf + count, \ + bufsize - count, \ + fmt , ##x); \ + else \ + printk(KERN_ERR "b43: fappend overflow\n"); \ + } while (0) + + +/* The biggest address values for SHM access from the debugfs files. */ +#define B43_MAX_SHM_ROUTING 4 +#define B43_MAX_SHM_ADDR 0xFFFF + +static ssize_t shm16read__read_file(struct b43_wldev *dev, + char *buf, size_t bufsize) +{ + ssize_t count = 0; + unsigned int routing, addr; + u16 val; + + routing = dev->dfsentry->shm16read_routing_next; + addr = dev->dfsentry->shm16read_addr_next; + if ((routing > B43_MAX_SHM_ROUTING) || + (addr > B43_MAX_SHM_ADDR)) + return -EDESTADDRREQ; + + val = b43_shm_read16(dev, routing, addr); + fappend("0x%04X\n", val); + + return count; +} + +static int shm16read__write_file(struct b43_wldev *dev, + const char *buf, size_t count) +{ + unsigned int routing, addr; + int res; + + res = sscanf(buf, "0x%X 0x%X", &routing, &addr); + if (res != 2) + return -EINVAL; + if (routing > B43_MAX_SHM_ROUTING) + return -EADDRNOTAVAIL; + if (addr > B43_MAX_SHM_ADDR) + return -EADDRNOTAVAIL; + if (routing == B43_SHM_SHARED) { + if ((addr % 2) != 0) + return -EADDRNOTAVAIL; + } + + dev->dfsentry->shm16read_routing_next = routing; + dev->dfsentry->shm16read_addr_next = addr; + + return 0; +} + +static int shm16write__write_file(struct b43_wldev *dev, + const char *buf, size_t count) +{ + unsigned int routing, addr, mask, set; + u16 val; + int res; + + res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X", + &routing, &addr, &mask, &set); + if (res != 4) + return -EINVAL; + if (routing > B43_MAX_SHM_ROUTING) + return -EADDRNOTAVAIL; + if (addr > B43_MAX_SHM_ADDR) + return -EADDRNOTAVAIL; + if (routing == B43_SHM_SHARED) { + if ((addr % 2) != 0) + return -EADDRNOTAVAIL; + } + if ((mask > 0xFFFF) || (set > 0xFFFF)) + return -E2BIG; + + if (mask == 0) + val = 0; + else + val = b43_shm_read16(dev, routing, addr); + val &= mask; + val |= set; + b43_shm_write16(dev, routing, addr, val); + + return 0; +} + +static ssize_t shm32read__read_file(struct b43_wldev *dev, + char *buf, size_t bufsize) +{ + ssize_t count = 0; + unsigned int routing, addr; + u32 val; + + routing = dev->dfsentry->shm32read_routing_next; + addr = dev->dfsentry->shm32read_addr_next; + if ((routing > B43_MAX_SHM_ROUTING) || + (addr > B43_MAX_SHM_ADDR)) + return -EDESTADDRREQ; + + val = b43_shm_read32(dev, routing, addr); + fappend("0x%08X\n", val); + + return count; +} + +static int shm32read__write_file(struct b43_wldev *dev, + const char *buf, size_t count) +{ + unsigned int routing, addr; + int res; + + res = sscanf(buf, "0x%X 0x%X", &routing, &addr); + if (res != 2) + return -EINVAL; + if (routing > B43_MAX_SHM_ROUTING) + return -EADDRNOTAVAIL; + if (addr > B43_MAX_SHM_ADDR) + return -EADDRNOTAVAIL; + if (routing == B43_SHM_SHARED) { + if ((addr % 2) != 0) + return -EADDRNOTAVAIL; + } + + dev->dfsentry->shm32read_routing_next = routing; + dev->dfsentry->shm32read_addr_next = addr; + + return 0; +} + +static int shm32write__write_file(struct b43_wldev *dev, + const char *buf, size_t count) +{ + unsigned int routing, addr, mask, set; + u32 val; + int res; + + res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X", + &routing, &addr, &mask, &set); + if (res != 4) + return -EINVAL; + if (routing > B43_MAX_SHM_ROUTING) + return -EADDRNOTAVAIL; + if (addr > B43_MAX_SHM_ADDR) + return -EADDRNOTAVAIL; + if (routing == B43_SHM_SHARED) { + if ((addr % 2) != 0) + return -EADDRNOTAVAIL; + } + if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF)) + return -E2BIG; + + if (mask == 0) + val = 0; + else + val = b43_shm_read32(dev, routing, addr); + val &= mask; + val |= set; + b43_shm_write32(dev, routing, addr, val); + + return 0; +} + +/* The biggest MMIO address that we allow access to from the debugfs files. */ +#define B43_MAX_MMIO_ACCESS (0xF00 - 1) + +static ssize_t mmio16read__read_file(struct b43_wldev *dev, + char *buf, size_t bufsize) +{ + ssize_t count = 0; + unsigned int addr; + u16 val; + + addr = dev->dfsentry->mmio16read_next; + if (addr > B43_MAX_MMIO_ACCESS) + return -EDESTADDRREQ; + + val = b43_read16(dev, addr); + fappend("0x%04X\n", val); + + return count; +} + +static int mmio16read__write_file(struct b43_wldev *dev, + const char *buf, size_t count) +{ + unsigned int addr; + int res; + + res = sscanf(buf, "0x%X", &addr); + if (res != 1) + return -EINVAL; + if (addr > B43_MAX_MMIO_ACCESS) + return -EADDRNOTAVAIL; + if ((addr % 2) != 0) + return -EINVAL; + + dev->dfsentry->mmio16read_next = addr; + + return 0; +} + +static int mmio16write__write_file(struct b43_wldev *dev, + const char *buf, size_t count) +{ + unsigned int addr, mask, set; + int res; + u16 val; + + res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set); + if (res != 3) + return -EINVAL; + if (addr > B43_MAX_MMIO_ACCESS) + return -EADDRNOTAVAIL; + if ((mask > 0xFFFF) || (set > 0xFFFF)) + return -E2BIG; + if ((addr % 2) != 0) + return -EINVAL; + + if (mask == 0) + val = 0; + else + val = b43_read16(dev, addr); + val &= mask; + val |= set; + b43_write16(dev, addr, val); + + return 0; +} + +static ssize_t mmio32read__read_file(struct b43_wldev *dev, + char *buf, size_t bufsize) +{ + ssize_t count = 0; + unsigned int addr; + u32 val; + + addr = dev->dfsentry->mmio32read_next; + if (addr > B43_MAX_MMIO_ACCESS) + return -EDESTADDRREQ; + + val = b43_read32(dev, addr); + fappend("0x%08X\n", val); + + return count; +} + +static int mmio32read__write_file(struct b43_wldev *dev, + const char *buf, size_t count) +{ + unsigned int addr; + int res; + + res = sscanf(buf, "0x%X", &addr); + if (res != 1) + return -EINVAL; + if (addr > B43_MAX_MMIO_ACCESS) + return -EADDRNOTAVAIL; + if ((addr % 4) != 0) + return -EINVAL; + + dev->dfsentry->mmio32read_next = addr; + + return 0; +} + +static int mmio32write__write_file(struct b43_wldev *dev, + const char *buf, size_t count) +{ + unsigned int addr, mask, set; + int res; + u32 val; + + res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set); + if (res != 3) + return -EINVAL; + if (addr > B43_MAX_MMIO_ACCESS) + return -EADDRNOTAVAIL; + if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF)) + return -E2BIG; + if ((addr % 4) != 0) + return -EINVAL; + + if (mask == 0) + val = 0; + else + val = b43_read32(dev, addr); + val &= mask; + val |= set; + b43_write32(dev, addr, val); + + return 0; +} + +static ssize_t txstat_read_file(struct b43_wldev *dev, + char *buf, size_t bufsize) +{ + struct b43_txstatus_log *log = &dev->dfsentry->txstatlog; + ssize_t count = 0; + int i, idx; + struct b43_txstatus *stat; + + if (log->end < 0) { + fappend("Nothing transmitted, yet\n"); + goto out; + } + fappend("b43 TX status reports:\n\n" + "index | cookie | seq | phy_stat | frame_count | " + "rts_count | supp_reason | pm_indicated | " + "intermediate | for_ampdu | acked\n" "---\n"); + i = log->end + 1; + idx = 0; + while (1) { + if (i == B43_NR_LOGGED_TXSTATUS) + i = 0; + stat = &(log->log[i]); + if (stat->cookie) { + fappend("%03d | " + "0x%04X | 0x%04X | 0x%02X | " + "0x%X | 0x%X | " + "%u | %u | " + "%u | %u | %u\n", + idx, + stat->cookie, stat->seq, stat->phy_stat, + stat->frame_count, stat->rts_count, + stat->supp_reason, stat->pm_indicated, + stat->intermediate, stat->for_ampdu, + stat->acked); + idx++; + } + if (i == log->end) + break; + i++; + } +out: + + return count; +} + +static int restart_write_file(struct b43_wldev *dev, + const char *buf, size_t count) +{ + int err = 0; + + if (count > 0 && buf[0] == '1') { + b43_controller_restart(dev, "manually restarted"); + } else + err = -EINVAL; + + return err; +} + +static unsigned long calc_expire_secs(unsigned long now, + unsigned long time, + unsigned long expire) +{ + expire = time + expire; + + if (time_after(now, expire)) + return 0; /* expired */ + if (expire < now) { + /* jiffies wrapped */ + expire -= MAX_JIFFY_OFFSET; + now -= MAX_JIFFY_OFFSET; + } + B43_WARN_ON(expire < now); + + return (expire - now) / HZ; +} + +static ssize_t loctls_read_file(struct b43_wldev *dev, + char *buf, size_t bufsize) +{ + ssize_t count = 0; + struct b43_txpower_lo_control *lo; + int i, err = 0; + struct b43_lo_calib *cal; + unsigned long now = jiffies; + struct b43_phy *phy = &dev->phy; + + if (phy->type != B43_PHYTYPE_G) { + fappend("Device is not a G-PHY\n"); + err = -ENODEV; + goto out; + } + lo = phy->g->lo_control; + fappend("-- Local Oscillator calibration data --\n\n"); + fappend("HW-power-control enabled: %d\n", + dev->phy.hardware_power_control); + fappend("TX Bias: 0x%02X, TX Magn: 0x%02X (expire in %lu sec)\n", + lo->tx_bias, lo->tx_magn, + calc_expire_secs(now, lo->txctl_measured_time, + B43_LO_TXCTL_EXPIRE)); + fappend("Power Vector: 0x%08X%08X (expires in %lu sec)\n", + (unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32), + (unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL), + calc_expire_secs(now, lo->pwr_vec_read_time, + B43_LO_PWRVEC_EXPIRE)); + + fappend("\nCalibrated settings:\n"); + list_for_each_entry(cal, &lo->calib_list, list) { + bool active; + + active = (b43_compare_bbatt(&cal->bbatt, &phy->g->bbatt) && + b43_compare_rfatt(&cal->rfatt, &phy->g->rfatt)); + fappend("BB(%d), RF(%d,%d) -> I=%d, Q=%d " + "(expires in %lu sec)%s\n", + cal->bbatt.att, + cal->rfatt.att, cal->rfatt.with_padmix, + cal->ctl.i, cal->ctl.q, + calc_expire_secs(now, cal->calib_time, + B43_LO_CALIB_EXPIRE), + active ? " ACTIVE" : ""); + } + + fappend("\nUsed RF attenuation values: Value(WithPadmix flag)\n"); + for (i = 0; i < lo->rfatt_list.len; i++) { + fappend("%u(%d), ", + lo->rfatt_list.list[i].att, + lo->rfatt_list.list[i].with_padmix); + } + fappend("\n"); + fappend("\nUsed Baseband attenuation values:\n"); + for (i = 0; i < lo->bbatt_list.len; i++) { + fappend("%u, ", + lo->bbatt_list.list[i].att); + } + fappend("\n"); + +out: + return err ? err : count; +} + +#undef fappend + +static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct b43_wldev *dev; + struct b43_debugfs_fops *dfops; + struct b43_dfs_file *dfile; + ssize_t ret; + char *buf; + const size_t bufsize = 1024 * 16; /* 16 kiB buffer */ + const size_t buforder = get_order(bufsize); + int err = 0; + + if (!count) + return 0; + dev = file->private_data; + if (!dev) + return -ENODEV; + + mutex_lock(&dev->wl->mutex); + if (b43_status(dev) < B43_STAT_INITIALIZED) { + err = -ENODEV; + goto out_unlock; + } + + dfops = container_of(debugfs_real_fops(file), + struct b43_debugfs_fops, fops); + if (!dfops->read) { + err = -ENOSYS; + goto out_unlock; + } + dfile = fops_to_dfs_file(dev, dfops); + + if (!dfile->buffer) { + buf = (char *)__get_free_pages(GFP_KERNEL, buforder); + if (!buf) { + err = -ENOMEM; + goto out_unlock; + } + memset(buf, 0, bufsize); + ret = dfops->read(dev, buf, bufsize); + if (ret <= 0) { + free_pages((unsigned long)buf, buforder); + err = ret; + goto out_unlock; + } + dfile->data_len = ret; + dfile->buffer = buf; + } + + ret = simple_read_from_buffer(userbuf, count, ppos, + dfile->buffer, + dfile->data_len); + if (*ppos >= dfile->data_len) { + free_pages((unsigned long)dfile->buffer, buforder); + dfile->buffer = NULL; + dfile->data_len = 0; + } +out_unlock: + mutex_unlock(&dev->wl->mutex); + + return err ? err : ret; +} + +static ssize_t b43_debugfs_write(struct file *file, + const char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct b43_wldev *dev; + struct b43_debugfs_fops *dfops; + char *buf; + int err = 0; + + if (!count) + return 0; + if (count > PAGE_SIZE) + return -E2BIG; + dev = file->private_data; + if (!dev) + return -ENODEV; + + mutex_lock(&dev->wl->mutex); + if (b43_status(dev) < B43_STAT_INITIALIZED) { + err = -ENODEV; + goto out_unlock; + } + + dfops = container_of(debugfs_real_fops(file), + struct b43_debugfs_fops, fops); + if (!dfops->write) { + err = -ENOSYS; + goto out_unlock; + } + + buf = (char *)get_zeroed_page(GFP_KERNEL); + if (!buf) { + err = -ENOMEM; + goto out_unlock; + } + if (copy_from_user(buf, userbuf, count)) { + err = -EFAULT; + goto out_freepage; + } + err = dfops->write(dev, buf, count); + if (err) + goto out_freepage; + +out_freepage: + free_page((unsigned long)buf); +out_unlock: + mutex_unlock(&dev->wl->mutex); + + return err ? err : count; +} + + +#define B43_DEBUGFS_FOPS(name, _read, _write) \ + static struct b43_debugfs_fops fops_##name = { \ + .read = _read, \ + .write = _write, \ + .fops = { \ + .open = simple_open, \ + .read = b43_debugfs_read, \ + .write = b43_debugfs_write, \ + .llseek = generic_file_llseek, \ + }, \ + .file_struct_offset = offsetof(struct b43_dfsentry, \ + file_##name), \ + } + +B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file); +B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file); +B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file); +B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file); +B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file); +B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file); +B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file); +B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file); +B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL); +B43_DEBUGFS_FOPS(restart, NULL, restart_write_file); +B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL); + + +bool b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature) +{ + bool enabled; + + enabled = (dev->dfsentry && dev->dfsentry->dyn_debug[feature]); + if (unlikely(enabled)) { + /* Force full debugging messages, if the user enabled + * some dynamic debugging feature. */ + b43_modparam_verbose = B43_VERBOSITY_MAX; + } + + return enabled; +} + +static void b43_remove_dynamic_debug(struct b43_wldev *dev) +{ + struct b43_dfsentry *e = dev->dfsentry; + int i; + + for (i = 0; i < __B43_NR_DYNDBG; i++) + debugfs_remove(e->dyn_debug_dentries[i]); +} + +static void b43_add_dynamic_debug(struct b43_wldev *dev) +{ + struct b43_dfsentry *e = dev->dfsentry; + +#define add_dyn_dbg(name, id, initstate) do { \ + e->dyn_debug[id] = (initstate); \ + e->dyn_debug_dentries[id] = \ + debugfs_create_bool(name, 0600, e->subdir, \ + &(e->dyn_debug[id])); \ + } while (0) + + add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, false); + add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, false); + add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, false); + add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, false); + add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, false); + add_dyn_dbg("debug_lo", B43_DBG_LO, false); + add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, false); + add_dyn_dbg("debug_keys", B43_DBG_KEYS, false); + add_dyn_dbg("debug_verbose_stats", B43_DBG_VERBOSESTATS, false); + +#undef add_dyn_dbg +} + +void b43_debugfs_add_device(struct b43_wldev *dev) +{ + struct b43_dfsentry *e; + struct b43_txstatus_log *log; + char devdir[16]; + + B43_WARN_ON(!dev); + e = kzalloc(sizeof(*e), GFP_KERNEL); + if (!e) { + b43err(dev->wl, "debugfs: add device OOM\n"); + return; + } + e->dev = dev; + log = &e->txstatlog; + log->log = kcalloc(B43_NR_LOGGED_TXSTATUS, + sizeof(struct b43_txstatus), GFP_KERNEL); + if (!log->log) { + b43err(dev->wl, "debugfs: add device txstatus OOM\n"); + kfree(e); + return; + } + log->end = -1; + + dev->dfsentry = e; + + snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy)); + e->subdir = debugfs_create_dir(devdir, rootdir); + + e->mmio16read_next = 0xFFFF; /* invalid address */ + e->mmio32read_next = 0xFFFF; /* invalid address */ + e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */ + e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */ + e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */ + e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */ + +#define ADD_FILE(name, mode) \ + do { \ + e->file_##name.dentry = \ + debugfs_create_file(__stringify(name), \ + mode, e->subdir, dev, \ + &fops_##name.fops); \ + } while (0) + + + ADD_FILE(shm16read, 0600); + ADD_FILE(shm16write, 0200); + ADD_FILE(shm32read, 0600); + ADD_FILE(shm32write, 0200); + ADD_FILE(mmio16read, 0600); + ADD_FILE(mmio16write, 0200); + ADD_FILE(mmio32read, 0600); + ADD_FILE(mmio32write, 0200); + ADD_FILE(txstat, 0400); + ADD_FILE(restart, 0200); + ADD_FILE(loctls, 0400); + +#undef ADD_FILE + + b43_add_dynamic_debug(dev); +} + +void b43_debugfs_remove_device(struct b43_wldev *dev) +{ + struct b43_dfsentry *e; + + if (!dev) + return; + e = dev->dfsentry; + if (!e) + return; + b43_remove_dynamic_debug(dev); + + debugfs_remove(e->file_shm16read.dentry); + debugfs_remove(e->file_shm16write.dentry); + debugfs_remove(e->file_shm32read.dentry); + debugfs_remove(e->file_shm32write.dentry); + debugfs_remove(e->file_mmio16read.dentry); + debugfs_remove(e->file_mmio16write.dentry); + debugfs_remove(e->file_mmio32read.dentry); + debugfs_remove(e->file_mmio32write.dentry); + debugfs_remove(e->file_txstat.dentry); + debugfs_remove(e->file_restart.dentry); + debugfs_remove(e->file_loctls.dentry); + + debugfs_remove(e->subdir); + kfree(e->txstatlog.log); + kfree(e); +} + +void b43_debugfs_log_txstat(struct b43_wldev *dev, + const struct b43_txstatus *status) +{ + struct b43_dfsentry *e = dev->dfsentry; + struct b43_txstatus_log *log; + struct b43_txstatus *cur; + int i; + + if (!e) + return; + log = &e->txstatlog; + i = log->end + 1; + if (i == B43_NR_LOGGED_TXSTATUS) + i = 0; + log->end = i; + cur = &(log->log[i]); + memcpy(cur, status, sizeof(*cur)); +} + +void b43_debugfs_init(void) +{ + rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL); +} + +void b43_debugfs_exit(void) +{ + debugfs_remove(rootdir); +} |