772 lines
17 KiB
C
772 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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Broadcom B43 wireless driver
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debugfs driver debugging code
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Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
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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 <linux/mutex.h>
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#include "b43.h"
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#include "main.h"
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#include "debugfs.h"
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#include "dma.h"
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#include "xmit.h"
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/* The root directory. */
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static struct dentry *rootdir;
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struct b43_debugfs_fops {
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ssize_t (*read)(struct b43_wldev *dev, char *buf, size_t bufsize);
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int (*write)(struct b43_wldev *dev, const char *buf, size_t count);
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struct file_operations fops;
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/* Offset of struct b43_dfs_file in struct b43_dfsentry */
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size_t file_struct_offset;
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};
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static inline
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struct b43_dfs_file *fops_to_dfs_file(struct b43_wldev *dev,
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const struct b43_debugfs_fops *dfops)
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{
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void *p;
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p = dev->dfsentry;
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p += dfops->file_struct_offset;
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return p;
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}
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#define fappend(fmt, x...) \
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do { \
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if (bufsize - count) \
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count += scnprintf(buf + count, \
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bufsize - count, \
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fmt , ##x); \
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else \
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printk(KERN_ERR "b43: fappend overflow\n"); \
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} while (0)
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/* The biggest address values for SHM access from the debugfs files. */
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#define B43_MAX_SHM_ROUTING 4
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#define B43_MAX_SHM_ADDR 0xFFFF
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static ssize_t shm16read__read_file(struct b43_wldev *dev,
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char *buf, size_t bufsize)
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{
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ssize_t count = 0;
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unsigned int routing, addr;
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u16 val;
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routing = dev->dfsentry->shm16read_routing_next;
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addr = dev->dfsentry->shm16read_addr_next;
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if ((routing > B43_MAX_SHM_ROUTING) ||
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(addr > B43_MAX_SHM_ADDR))
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return -EDESTADDRREQ;
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val = b43_shm_read16(dev, routing, addr);
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fappend("0x%04X\n", val);
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return count;
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}
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static int shm16read__write_file(struct b43_wldev *dev,
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const char *buf, size_t count)
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{
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unsigned int routing, addr;
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int res;
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res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
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if (res != 2)
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return -EINVAL;
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if (routing > B43_MAX_SHM_ROUTING)
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return -EADDRNOTAVAIL;
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if (addr > B43_MAX_SHM_ADDR)
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return -EADDRNOTAVAIL;
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if (routing == B43_SHM_SHARED) {
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if ((addr % 2) != 0)
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return -EADDRNOTAVAIL;
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}
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dev->dfsentry->shm16read_routing_next = routing;
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dev->dfsentry->shm16read_addr_next = addr;
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return 0;
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}
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static int shm16write__write_file(struct b43_wldev *dev,
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const char *buf, size_t count)
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{
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unsigned int routing, addr, mask, set;
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u16 val;
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int res;
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res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
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&routing, &addr, &mask, &set);
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if (res != 4)
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return -EINVAL;
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if (routing > B43_MAX_SHM_ROUTING)
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return -EADDRNOTAVAIL;
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if (addr > B43_MAX_SHM_ADDR)
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return -EADDRNOTAVAIL;
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if (routing == B43_SHM_SHARED) {
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if ((addr % 2) != 0)
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return -EADDRNOTAVAIL;
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}
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if ((mask > 0xFFFF) || (set > 0xFFFF))
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return -E2BIG;
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if (mask == 0)
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val = 0;
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else
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val = b43_shm_read16(dev, routing, addr);
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val &= mask;
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val |= set;
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b43_shm_write16(dev, routing, addr, val);
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return 0;
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}
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static ssize_t shm32read__read_file(struct b43_wldev *dev,
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char *buf, size_t bufsize)
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{
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ssize_t count = 0;
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unsigned int routing, addr;
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u32 val;
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routing = dev->dfsentry->shm32read_routing_next;
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addr = dev->dfsentry->shm32read_addr_next;
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if ((routing > B43_MAX_SHM_ROUTING) ||
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(addr > B43_MAX_SHM_ADDR))
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return -EDESTADDRREQ;
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val = b43_shm_read32(dev, routing, addr);
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fappend("0x%08X\n", val);
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return count;
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}
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static int shm32read__write_file(struct b43_wldev *dev,
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const char *buf, size_t count)
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{
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unsigned int routing, addr;
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int res;
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res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
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if (res != 2)
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return -EINVAL;
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if (routing > B43_MAX_SHM_ROUTING)
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return -EADDRNOTAVAIL;
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if (addr > B43_MAX_SHM_ADDR)
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return -EADDRNOTAVAIL;
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if (routing == B43_SHM_SHARED) {
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if ((addr % 2) != 0)
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return -EADDRNOTAVAIL;
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}
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dev->dfsentry->shm32read_routing_next = routing;
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dev->dfsentry->shm32read_addr_next = addr;
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return 0;
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}
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static int shm32write__write_file(struct b43_wldev *dev,
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const char *buf, size_t count)
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{
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unsigned int routing, addr, mask, set;
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u32 val;
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int res;
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res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
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&routing, &addr, &mask, &set);
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if (res != 4)
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return -EINVAL;
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if (routing > B43_MAX_SHM_ROUTING)
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return -EADDRNOTAVAIL;
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if (addr > B43_MAX_SHM_ADDR)
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return -EADDRNOTAVAIL;
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if (routing == B43_SHM_SHARED) {
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if ((addr % 2) != 0)
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return -EADDRNOTAVAIL;
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}
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if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
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return -E2BIG;
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if (mask == 0)
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val = 0;
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else
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val = b43_shm_read32(dev, routing, addr);
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val &= mask;
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val |= set;
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b43_shm_write32(dev, routing, addr, val);
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return 0;
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}
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/* The biggest MMIO address that we allow access to from the debugfs files. */
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#define B43_MAX_MMIO_ACCESS (0xF00 - 1)
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static ssize_t mmio16read__read_file(struct b43_wldev *dev,
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char *buf, size_t bufsize)
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{
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ssize_t count = 0;
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unsigned int addr;
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u16 val;
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addr = dev->dfsentry->mmio16read_next;
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if (addr > B43_MAX_MMIO_ACCESS)
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return -EDESTADDRREQ;
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val = b43_read16(dev, addr);
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fappend("0x%04X\n", val);
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return count;
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}
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static int mmio16read__write_file(struct b43_wldev *dev,
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const char *buf, size_t count)
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{
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unsigned int addr;
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int res;
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res = sscanf(buf, "0x%X", &addr);
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if (res != 1)
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return -EINVAL;
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if (addr > B43_MAX_MMIO_ACCESS)
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return -EADDRNOTAVAIL;
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if ((addr % 2) != 0)
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return -EINVAL;
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dev->dfsentry->mmio16read_next = addr;
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return 0;
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}
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static int mmio16write__write_file(struct b43_wldev *dev,
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const char *buf, size_t count)
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{
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unsigned int addr, mask, set;
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int res;
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u16 val;
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res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
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if (res != 3)
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return -EINVAL;
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if (addr > B43_MAX_MMIO_ACCESS)
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return -EADDRNOTAVAIL;
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if ((mask > 0xFFFF) || (set > 0xFFFF))
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return -E2BIG;
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if ((addr % 2) != 0)
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return -EINVAL;
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if (mask == 0)
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val = 0;
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else
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val = b43_read16(dev, addr);
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val &= mask;
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val |= set;
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b43_write16(dev, addr, val);
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return 0;
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}
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static ssize_t mmio32read__read_file(struct b43_wldev *dev,
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char *buf, size_t bufsize)
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{
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ssize_t count = 0;
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unsigned int addr;
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u32 val;
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addr = dev->dfsentry->mmio32read_next;
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if (addr > B43_MAX_MMIO_ACCESS)
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return -EDESTADDRREQ;
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val = b43_read32(dev, addr);
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fappend("0x%08X\n", val);
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return count;
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}
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static int mmio32read__write_file(struct b43_wldev *dev,
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const char *buf, size_t count)
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{
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unsigned int addr;
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int res;
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res = sscanf(buf, "0x%X", &addr);
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if (res != 1)
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return -EINVAL;
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if (addr > B43_MAX_MMIO_ACCESS)
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return -EADDRNOTAVAIL;
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if ((addr % 4) != 0)
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return -EINVAL;
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dev->dfsentry->mmio32read_next = addr;
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return 0;
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}
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static int mmio32write__write_file(struct b43_wldev *dev,
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const char *buf, size_t count)
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{
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unsigned int addr, mask, set;
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int res;
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u32 val;
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res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
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if (res != 3)
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return -EINVAL;
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if (addr > B43_MAX_MMIO_ACCESS)
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return -EADDRNOTAVAIL;
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if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
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return -E2BIG;
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if ((addr % 4) != 0)
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return -EINVAL;
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if (mask == 0)
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val = 0;
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else
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val = b43_read32(dev, addr);
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val &= mask;
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val |= set;
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b43_write32(dev, addr, val);
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return 0;
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}
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static ssize_t txstat_read_file(struct b43_wldev *dev,
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char *buf, size_t bufsize)
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{
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struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
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ssize_t count = 0;
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int i, idx;
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struct b43_txstatus *stat;
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if (log->end < 0) {
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fappend("Nothing transmitted, yet\n");
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goto out;
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}
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fappend("b43 TX status reports:\n\n"
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"index | cookie | seq | phy_stat | frame_count | "
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"rts_count | supp_reason | pm_indicated | "
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"intermediate | for_ampdu | acked\n" "---\n");
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i = log->end + 1;
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idx = 0;
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while (1) {
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if (i == B43_NR_LOGGED_TXSTATUS)
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i = 0;
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stat = &(log->log[i]);
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if (stat->cookie) {
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fappend("%03d | "
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"0x%04X | 0x%04X | 0x%02X | "
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"0x%X | 0x%X | "
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"%u | %u | "
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"%u | %u | %u\n",
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idx,
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stat->cookie, stat->seq, stat->phy_stat,
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stat->frame_count, stat->rts_count,
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stat->supp_reason, stat->pm_indicated,
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stat->intermediate, stat->for_ampdu,
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stat->acked);
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idx++;
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}
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if (i == log->end)
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break;
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i++;
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}
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out:
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return count;
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}
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static int restart_write_file(struct b43_wldev *dev,
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const char *buf, size_t count)
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{
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int err = 0;
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if (count > 0 && buf[0] == '1') {
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b43_controller_restart(dev, "manually restarted");
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} else
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err = -EINVAL;
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return err;
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}
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static unsigned long calc_expire_secs(unsigned long now,
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unsigned long time,
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unsigned long expire)
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{
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expire = time + expire;
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if (time_after(now, expire))
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return 0; /* expired */
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if (expire < now) {
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/* jiffies wrapped */
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expire -= MAX_JIFFY_OFFSET;
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now -= MAX_JIFFY_OFFSET;
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}
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B43_WARN_ON(expire < now);
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return (expire - now) / HZ;
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}
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static ssize_t loctls_read_file(struct b43_wldev *dev,
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char *buf, size_t bufsize)
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{
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ssize_t count = 0;
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struct b43_txpower_lo_control *lo;
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int i, err = 0;
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struct b43_lo_calib *cal;
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unsigned long now = jiffies;
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struct b43_phy *phy = &dev->phy;
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if (phy->type != B43_PHYTYPE_G) {
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fappend("Device is not a G-PHY\n");
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err = -ENODEV;
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goto out;
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}
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lo = phy->g->lo_control;
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fappend("-- Local Oscillator calibration data --\n\n");
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fappend("HW-power-control enabled: %d\n",
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dev->phy.hardware_power_control);
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fappend("TX Bias: 0x%02X, TX Magn: 0x%02X (expire in %lu sec)\n",
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lo->tx_bias, lo->tx_magn,
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calc_expire_secs(now, lo->txctl_measured_time,
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B43_LO_TXCTL_EXPIRE));
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fappend("Power Vector: 0x%08X%08X (expires in %lu sec)\n",
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(unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
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(unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
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calc_expire_secs(now, lo->pwr_vec_read_time,
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B43_LO_PWRVEC_EXPIRE));
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fappend("\nCalibrated settings:\n");
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list_for_each_entry(cal, &lo->calib_list, list) {
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bool active;
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active = (b43_compare_bbatt(&cal->bbatt, &phy->g->bbatt) &&
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b43_compare_rfatt(&cal->rfatt, &phy->g->rfatt));
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fappend("BB(%d), RF(%d,%d) -> I=%d, Q=%d "
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"(expires in %lu sec)%s\n",
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cal->bbatt.att,
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cal->rfatt.att, cal->rfatt.with_padmix,
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cal->ctl.i, cal->ctl.q,
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calc_expire_secs(now, cal->calib_time,
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B43_LO_CALIB_EXPIRE),
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active ? " ACTIVE" : "");
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}
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fappend("\nUsed RF attenuation values: Value(WithPadmix flag)\n");
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for (i = 0; i < lo->rfatt_list.len; i++) {
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fappend("%u(%d), ",
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lo->rfatt_list.list[i].att,
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lo->rfatt_list.list[i].with_padmix);
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}
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fappend("\n");
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fappend("\nUsed Baseband attenuation values:\n");
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for (i = 0; i < lo->bbatt_list.len; i++) {
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fappend("%u, ",
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lo->bbatt_list.list[i].att);
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}
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fappend("\n");
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out:
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return err ? err : count;
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}
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#undef fappend
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static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct b43_wldev *dev;
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struct b43_debugfs_fops *dfops;
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struct b43_dfs_file *dfile;
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ssize_t ret;
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char *buf;
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const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
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const size_t buforder = get_order(bufsize);
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int err = 0;
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if (!count)
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return 0;
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dev = file->private_data;
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if (!dev)
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return -ENODEV;
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mutex_lock(&dev->wl->mutex);
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if (b43_status(dev) < B43_STAT_INITIALIZED) {
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err = -ENODEV;
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goto out_unlock;
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}
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dfops = container_of(debugfs_real_fops(file),
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struct b43_debugfs_fops, fops);
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if (!dfops->read) {
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err = -ENOSYS;
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goto out_unlock;
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}
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dfile = fops_to_dfs_file(dev, dfops);
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if (!dfile->buffer) {
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buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
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if (!buf) {
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err = -ENOMEM;
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goto out_unlock;
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}
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|
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_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); \
|
|
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 { \
|
|
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;
|
|
|
|
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);
|
|
}
|