text: /*
   * Copyright (c) 2012-2015 Qualcomm Atheros, Inc.
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include <linux/module.h>
  #include <linux/debugfs.h>
  #include <linux/seq_file.h>
  #include <linux/pci.h>
  #include <linux/rtnetlink.h>
  #include <linux/power_supply.h>
  
  #include "wil6210.h"
  #include "wmi.h"
  #include "txrx.h"
  #include "pmc.h"
  
  /* Nasty hack. Better have per device instances */
  static u32 mem_addr;
  static u32 dbg_txdesc_index;
  static u32 dbg_vring_index; /* 24+ for Rx, 0..23 for Tx */
  u32 vring_idle_trsh = 16; /* HW fetches up to 16 descriptors at once */
  
  enum dbg_off_type {
  	doff_u32 = 0,
  	doff_x32 = 1,
  	doff_ulong = 2,
  	doff_io32 = 3,
  };
  
  /* offset to "wil" */
  struct dbg_off {
  	const char *name;
  	umode_t mode;
  	ulong off;
  	enum dbg_off_type type;
  };
  
  static void wil_print_vring(struct seq_file *s, struct wil6210_priv *wil,
  			    const char *name, struct vring *vring,
  			    char _s, char _h)
  {
  	void __iomem *x = wmi_addr(wil, vring->hwtail);
  	u32 v;
  
  	seq_printf(s, "VRING %s = {\n", name);
  	seq_printf(s, "  pa     = %pad\n", &vring->pa);
  	seq_printf(s, "  va     = 0x%p\n", vring->va);
  	seq_printf(s, "  size   = %d\n", vring->size);
  	seq_printf(s, "  swtail = %d\n", vring->swtail);
  	seq_printf(s, "  swhead = %d\n", vring->swhead);
  	seq_printf(s, "  hwtail = [0x%08x] -> ", vring->hwtail);
  	if (x) {
  		v = readl(x);
  		seq_printf(s, "0x%08x = %d\n", v, v);
  	} else {
  		seq_puts(s, "???\n");
  	}
  
  	if (vring->va && (vring->size < 1025)) {
  		uint i;
  
  		for (i = 0; i < vring->size; i++) {
  			volatile struct vring_tx_desc *d = &vring->va[i].tx;
  
  			if ((i % 64) == 0 && (i != 0))
  				seq_puts(s, "\n");
  			seq_printf(s, "%c", (d->dma.status & BIT(0)) ?
  					_s : (vring->ctx[i].skb ? _h : 'h'));
  		}
  		seq_puts(s, "\n");
  	}
  	seq_puts(s, "}\n");
  }
  
  static int wil_vring_debugfs_show(struct seq_file *s, void *data)
  {
  	uint i;
  	struct wil6210_priv *wil = s->private;
  
  	wil_print_vring(s, wil, "rx", &wil->vring_rx, 'S', '_');
  
  	for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
  		struct vring *vring = &wil->vring_tx[i];
  		struct vring_tx_data *txdata = &wil->vring_tx_data[i];
  
  		if (vring->va) {
  			int cid = wil->vring2cid_tid[i][0];
  			int tid = wil->vring2cid_tid[i][1];
  			u32 swhead = vring->swhead;
  			u32 swtail = vring->swtail;
  			int used = (vring->size + swhead - swtail)
  				   % vring->size;
  			int avail = vring->size - used - 1;
  			char name[10];
  			char sidle[10];
  			/* performance monitoring */
  			cycles_t now = get_cycles();
  			uint64_t idle = txdata->idle * 100;
  			uint64_t total = now - txdata->begin;
  
  			if (total != 0) {
  				do_div(idle, total);
  				snprintf(sidle, sizeof(sidle), "%3d%%",
  					 (int)idle);
  			} else {
  				snprintf(sidle, sizeof(sidle), "N/A");
  			}
  			txdata->begin = now;
  			txdata->idle = 0ULL;
  
  			snprintf(name, sizeof(name), "tx_%2d", i);
  
  			if (cid < WIL6210_MAX_CID)
  				seq_printf(s,
  					   "\n%pM CID %d TID %d 1x%s BACK([%u] %u TU A%s) [%3d|%3d] idle %s\n",
  					   wil->sta[cid].addr, cid, tid,
  					   txdata->dot1x_open ? "+" : "-",
  					   txdata->agg_wsize,
  					   txdata->agg_timeout,
  					   txdata->agg_amsdu ? "+" : "-",
  					   used, avail, sidle);
  			else
  				seq_printf(s,
  					   "\nBroadcast 1x%s [%3d|%3d] idle %s\n",
  					   txdata->dot1x_open ? "+" : "-",
  					   used, avail, sidle);
  
  			wil_print_vring(s, wil, name, vring, '_', 'H');
  		}
  	}
  
  	return 0;
  }
  
  static int wil_vring_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_vring_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_vring = {
  	.open		= wil_vring_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  static void wil_seq_hexdump(struct seq_file *s, void *p, int len,
  			    const char *prefix)
  {
  	seq_hex_dump(s, prefix, DUMP_PREFIX_NONE, 16, 1, p, len, false);
  }
  
  static void wil_print_ring(struct seq_file *s, const char *prefix,
  			   void __iomem *off)
  {
  	struct wil6210_priv *wil = s->private;
  	struct wil6210_mbox_ring r;
  	int rsize;
  	uint i;
  
  	wil_memcpy_fromio_32(&r, off, sizeof(r));
  	wil_mbox_ring_le2cpus(&r);
  	/*
  	 * we just read memory block from NIC. This memory may be
  	 * garbage. Check validity before using it.
  	 */
  	rsize = r.size / sizeof(struct wil6210_mbox_ring_desc);
  
  	seq_printf(s, "ring %s = {\n", prefix);
  	seq_printf(s, "  base = 0x%08x\n", r.base);
  	seq_printf(s, "  size = 0x%04x bytes -> %d entries\n", r.size, rsize);
  	seq_printf(s, "  tail = 0x%08x\n", r.tail);
  	seq_printf(s, "  head = 0x%08x\n", r.head);
  	seq_printf(s, "  entry size = %d\n", r.entry_size);
  
  	if (r.size % sizeof(struct wil6210_mbox_ring_desc)) {
  		seq_printf(s, "  ??? size is not multiple of %zd, garbage?\n",
  			   sizeof(struct wil6210_mbox_ring_desc));
  		goto out;
  	}
  
  	if (!wmi_addr(wil, r.base) ||
  	    !wmi_addr(wil, r.tail) ||
  	    !wmi_addr(wil, r.head)) {
  		seq_puts(s, "  ??? pointers are garbage?\n");
  		goto out;
  	}
  
  	for (i = 0; i < rsize; i++) {
  		struct wil6210_mbox_ring_desc d;
  		struct wil6210_mbox_hdr hdr;
  		size_t delta = i * sizeof(d);
  		void __iomem *x = wil->csr + HOSTADDR(r.base) + delta;
  
  		wil_memcpy_fromio_32(&d, x, sizeof(d));
  
  		seq_printf(s, "  [%2x] %s %s%s 0x%08x", i,
  			   d.sync ? "F" : "E",
  			   (r.tail - r.base == delta) ? "t" : " ",
  			   (r.head - r.base == delta) ? "h" : " ",
  			   le32_to_cpu(d.addr));
  		if (0 == wmi_read_hdr(wil, d.addr, &hdr)) {
  			u16 len = le16_to_cpu(hdr.len);
  
  			seq_printf(s, " -> %04x %04x %04x %02x\n",
  				   le16_to_cpu(hdr.seq), len,
  				   le16_to_cpu(hdr.type), hdr.flags);
  			if (len <= MAX_MBOXITEM_SIZE) {
  				unsigned char databuf[MAX_MBOXITEM_SIZE];
  				void __iomem *src = wmi_buffer(wil, d.addr) +
  					sizeof(struct wil6210_mbox_hdr);
  				/*
  				 * No need to check @src for validity -
  				 * we already validated @d.addr while
  				 * reading header
  				 */
  				wil_memcpy_fromio_32(databuf, src, len);
  				wil_seq_hexdump(s, databuf, len, "      : ");
  			}
  		} else {
  			seq_puts(s, "\n");
  		}
  	}
   out:
  	seq_puts(s, "}\n");
  }
  
  static int wil_mbox_debugfs_show(struct seq_file *s, void *data)
  {
  	struct wil6210_priv *wil = s->private;
  
  	wil_print_ring(s, "tx", wil->csr + HOST_MBOX +
  		       offsetof(struct wil6210_mbox_ctl, tx));
  	wil_print_ring(s, "rx", wil->csr + HOST_MBOX +
  		       offsetof(struct wil6210_mbox_ctl, rx));
  
  	return 0;
  }
  
  static int wil_mbox_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_mbox_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_mbox = {
  	.open		= wil_mbox_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  static int wil_debugfs_iomem_x32_set(void *data, u64 val)
  {
  	writel(val, (void __iomem *)data);
  	wmb(); /* make sure write propagated to HW */
  
  	return 0;
  }
  
  static int wil_debugfs_iomem_x32_get(void *data, u64 *val)
  {
  	*val = readl((void __iomem *)data);
  
  	return 0;
  }
  
  DEFINE_SIMPLE_ATTRIBUTE(fops_iomem_x32, wil_debugfs_iomem_x32_get,
  			wil_debugfs_iomem_x32_set, "0x%08llx\n");
  
  static struct dentry *wil_debugfs_create_iomem_x32(const char *name,
  						   umode_t mode,
  						   struct dentry *parent,
  						   void *value)
  {
  	return debugfs_create_file(name, mode, parent, value,
  				   &fops_iomem_x32);
  }
  
  static int wil_debugfs_ulong_set(void *data, u64 val)
  {
  	*(ulong *)data = val;
  	return 0;
  }
  
  static int wil_debugfs_ulong_get(void *data, u64 *val)
  {
  	*val = *(ulong *)data;
  	return 0;
  }
  
  DEFINE_SIMPLE_ATTRIBUTE(wil_fops_ulong, wil_debugfs_ulong_get,
  			wil_debugfs_ulong_set, "0x%llx\n");
  
  static struct dentry *wil_debugfs_create_ulong(const char *name, umode_t mode,
  					       struct dentry *parent,
  					       ulong *value)
  {
  	return debugfs_create_file(name, mode, parent, value, &wil_fops_ulong);
  }
  
  /**
   * wil6210_debugfs_init_offset - create set of debugfs files
   * @wil - driver's context, used for printing
   * @dbg - directory on the debugfs, where files will be created
   * @base - base address used in address calculation
   * @tbl - table with file descriptions. Should be terminated with empty element.
   *
   * Creates files accordingly to the @tbl.
   */
  static void wil6210_debugfs_init_offset(struct wil6210_priv *wil,
  					struct dentry *dbg, void *base,
  					const struct dbg_off * const tbl)
  {
  	int i;
  
  	for (i = 0; tbl[i].name; i++) {
  		struct dentry *f;
  
  		switch (tbl[i].type) {
  		case doff_u32:
  			f = debugfs_create_u32(tbl[i].name, tbl[i].mode, dbg,
  					       base + tbl[i].off);
  			break;
  		case doff_x32:
  			f = debugfs_create_x32(tbl[i].name, tbl[i].mode, dbg,
  					       base + tbl[i].off);
  			break;
  		case doff_ulong:
  			f = wil_debugfs_create_ulong(tbl[i].name, tbl[i].mode,
  						     dbg, base + tbl[i].off);
  			break;
  		case doff_io32:
  			f = wil_debugfs_create_iomem_x32(tbl[i].name,
  							 tbl[i].mode, dbg,
  							 base + tbl[i].off);
  			break;
  		default:
  			f = ERR_PTR(-EINVAL);
  		}
  		if (IS_ERR_OR_NULL(f))
  			wil_err(wil, "Create file \"%s\": err %ld\n",
  				tbl[i].name, PTR_ERR(f));
  	}
  }
  
  static const struct dbg_off isr_off[] = {
  	{"ICC", S_IRUGO | S_IWUSR, offsetof(struct RGF_ICR, ICC), doff_io32},
  	{"ICR", S_IRUGO | S_IWUSR, offsetof(struct RGF_ICR, ICR), doff_io32},
  	{"ICM", S_IRUGO | S_IWUSR, offsetof(struct RGF_ICR, ICM), doff_io32},
  	{"ICS",		  S_IWUSR, offsetof(struct RGF_ICR, ICS), doff_io32},
  	{"IMV", S_IRUGO | S_IWUSR, offsetof(struct RGF_ICR, IMV), doff_io32},
  	{"IMS",		  S_IWUSR, offsetof(struct RGF_ICR, IMS), doff_io32},
  	{"IMC",		  S_IWUSR, offsetof(struct RGF_ICR, IMC), doff_io32},
  	{},
  };
  
  static int wil6210_debugfs_create_ISR(struct wil6210_priv *wil,
  				      const char *name,
  				      struct dentry *parent, u32 off)
  {
  	struct dentry *d = debugfs_create_dir(name, parent);
  
  	if (IS_ERR_OR_NULL(d))
  		return -ENODEV;
  
  	wil6210_debugfs_init_offset(wil, d, (void * __force)wil->csr + off,
  				    isr_off);
  
  	return 0;
  }
  
  static const struct dbg_off pseudo_isr_off[] = {
  	{"CAUSE",   S_IRUGO, HOSTADDR(RGF_DMA_PSEUDO_CAUSE), doff_io32},
  	{"MASK_SW", S_IRUGO, HOSTADDR(RGF_DMA_PSEUDO_CAUSE_MASK_SW), doff_io32},
  	{"MASK_FW", S_IRUGO, HOSTADDR(RGF_DMA_PSEUDO_CAUSE_MASK_FW), doff_io32},
  	{},
  };
  
  static int wil6210_debugfs_create_pseudo_ISR(struct wil6210_priv *wil,
  					     struct dentry *parent)
  {
  	struct dentry *d = debugfs_create_dir("PSEUDO_ISR", parent);
  
  	if (IS_ERR_OR_NULL(d))
  		return -ENODEV;
  
  	wil6210_debugfs_init_offset(wil, d, (void * __force)wil->csr,
  				    pseudo_isr_off);
  
  	return 0;
  }
  
  static const struct dbg_off lgc_itr_cnt_off[] = {
  	{"TRSH", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_CNT_TRSH), doff_io32},
  	{"DATA", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_CNT_DATA), doff_io32},
  	{"CTL",  S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_CNT_CRL), doff_io32},
  	{},
  };
  
  static const struct dbg_off tx_itr_cnt_off[] = {
  	{"TRSH", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_TX_CNT_TRSH),
  	 doff_io32},
  	{"DATA", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_TX_CNT_DATA),
  	 doff_io32},
  	{"CTL",  S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_TX_CNT_CTL),
  	 doff_io32},
  	{"IDL_TRSH", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_TX_IDL_CNT_TRSH),
  	 doff_io32},
  	{"IDL_DATA", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_TX_IDL_CNT_DATA),
  	 doff_io32},
  	{"IDL_CTL",  S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_TX_IDL_CNT_CTL),
  	 doff_io32},
  	{},
  };
  
  static const struct dbg_off rx_itr_cnt_off[] = {
  	{"TRSH", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_RX_CNT_TRSH),
  	 doff_io32},
  	{"DATA", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_RX_CNT_DATA),
  	 doff_io32},
  	{"CTL",  S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_RX_CNT_CTL),
  	 doff_io32},
  	{"IDL_TRSH", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_RX_IDL_CNT_TRSH),
  	 doff_io32},
  	{"IDL_DATA", S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_RX_IDL_CNT_DATA),
  	 doff_io32},
  	{"IDL_CTL",  S_IRUGO | S_IWUSR, HOSTADDR(RGF_DMA_ITR_RX_IDL_CNT_CTL),
  	 doff_io32},
  	{},
  };
  
  static int wil6210_debugfs_create_ITR_CNT(struct wil6210_priv *wil,
  					  struct dentry *parent)
  {
  	struct dentry *d, *dtx, *drx;
  
  	d = debugfs_create_dir("ITR_CNT", parent);
  	if (IS_ERR_OR_NULL(d))
  		return -ENODEV;
  
  	dtx = debugfs_create_dir("TX", d);
  	drx = debugfs_create_dir("RX", d);
  	if (IS_ERR_OR_NULL(dtx) || IS_ERR_OR_NULL(drx))
  		return -ENODEV;
  
  	wil6210_debugfs_init_offset(wil, d, (void * __force)wil->csr,
  				    lgc_itr_cnt_off);
  
  	wil6210_debugfs_init_offset(wil, dtx, (void * __force)wil->csr,
  				    tx_itr_cnt_off);
  
  	wil6210_debugfs_init_offset(wil, drx, (void * __force)wil->csr,
  				    rx_itr_cnt_off);
  	return 0;
  }
  
  static int wil_memread_debugfs_show(struct seq_file *s, void *data)
  {
  	struct wil6210_priv *wil = s->private;
  	void __iomem *a = wmi_buffer(wil, cpu_to_le32(mem_addr));
  
  	if (a)
  		seq_printf(s, "[0x%08x] = 0x%08x\n", mem_addr, readl(a));
  	else
  		seq_printf(s, "[0x%08x] = INVALID\n", mem_addr);
  
  	return 0;
  }
  
  static int wil_memread_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_memread_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_memread = {
  	.open		= wil_memread_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  static ssize_t wil_read_file_ioblob(struct file *file, char __user *user_buf,
  				    size_t count, loff_t *ppos)
  {
  	enum { max_count = 4096 };
  	struct debugfs_blob_wrapper *blob = file->private_data;
  	loff_t pos = *ppos;
  	size_t available = blob->size;
  	void *buf;
  	size_t ret;
  
  	if (pos < 0)
  		return -EINVAL;
  
  	if (pos >= available || !count)
  		return 0;
  
  	if (count > available - pos)
  		count = available - pos;
  	if (count > max_count)
  		count = max_count;
  
  	buf = kmalloc(count, GFP_KERNEL);
  	if (!buf)
  		return -ENOMEM;
  
  	wil_memcpy_fromio_32(buf, (const volatile void __iomem *)blob->data +
  			     pos, count);
  
  	ret = copy_to_user(user_buf, buf, count);
  	kfree(buf);
  	if (ret == count)
  		return -EFAULT;
  
  	count -= ret;
  	*ppos = pos + count;
  
  	return count;
  }
  
  static const struct file_operations fops_ioblob = {
  	.read =		wil_read_file_ioblob,
  	.open =		simple_open,
  	.llseek =	default_llseek,
  };
  
  static
  struct dentry *wil_debugfs_create_ioblob(const char *name,
  					 umode_t mode,
  					 struct dentry *parent,
  					 struct debugfs_blob_wrapper *blob)
  {
  	return debugfs_create_file(name, mode, parent, blob, &fops_ioblob);
  }
  
  /*---reset---*/
  static ssize_t wil_write_file_reset(struct file *file, const char __user *buf,
  				    size_t len, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	struct net_device *ndev = wil_to_ndev(wil);
  
  	/**
  	 * BUG:
  	 * this code does NOT sync device state with the rest of system
  	 * use with care, debug only!!!
  	 */
  	rtnl_lock();
  	dev_close(ndev);
  	ndev->flags &= ~IFF_UP;
  	rtnl_unlock();
  	wil_reset(wil, true);
  
  	return len;
  }
  
  static const struct file_operations fops_reset = {
  	.write = wil_write_file_reset,
  	.open  = simple_open,
  };
  
  /*---write channel 1..4 to rxon for it, 0 to rxoff---*/
  static ssize_t wil_write_file_rxon(struct file *file, const char __user *buf,
  				   size_t len, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	int rc;
  	long channel;
  	bool on;
  
  	char *kbuf = kmalloc(len + 1, GFP_KERNEL);
  
  	if (!kbuf)
  		return -ENOMEM;
  	if (copy_from_user(kbuf, buf, len)) {
  		kfree(kbuf);
  		return -EIO;
  	}
  
  	kbuf[len] = '\0';
  	rc = kstrtol(kbuf, 0, &channel);
  	kfree(kbuf);
  	if (rc)
  		return rc;
  
  	if ((channel < 0) || (channel > 4)) {
  		wil_err(wil, "Invalid channel %ld\n", channel);
  		return -EINVAL;
  	}
  	on = !!channel;
  
  	if (on) {
  		rc = wmi_set_channel(wil, (int)channel);
  		if (rc)
  			return rc;
  	}
  
  	rc = wmi_rxon(wil, on);
  	if (rc)
  		return rc;
  
  	return len;
  }
  
  static const struct file_operations fops_rxon = {
  	.write = wil_write_file_rxon,
  	.open  = simple_open,
  };
  
  /* block ack control, write:
   * - "add <ringid> <agg_size> <timeout>" to trigger ADDBA
   * - "del_tx <ringid> <reason>" to trigger DELBA for Tx side
   * - "del_rx <CID> <TID> <reason>" to trigger DELBA for Rx side
   */
  static ssize_t wil_write_back(struct file *file, const char __user *buf,
  			      size_t len, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	int rc;
  	char *kbuf = kmalloc(len + 1, GFP_KERNEL);
  	char cmd[9];
  	int p1, p2, p3;
  
  	if (!kbuf)
  		return -ENOMEM;
  
  	rc = simple_write_to_buffer(kbuf, len, ppos, buf, len);
  	if (rc != len) {
  		kfree(kbuf);
  		return rc >= 0 ? -EIO : rc;
  	}
  
  	kbuf[len] = '\0';
  	rc = sscanf(kbuf, "%8s %d %d %d", cmd, &p1, &p2, &p3);
  	kfree(kbuf);
  
  	if (rc < 0)
  		return rc;
  	if (rc < 2)
  		return -EINVAL;
  
  	if (0 == strcmp(cmd, "add")) {
  		if (rc < 3) {
  			wil_err(wil, "BACK: add require at least 2 params\n");
  			return -EINVAL;
  		}
  		if (rc < 4)
  			p3 = 0;
  		wmi_addba(wil, p1, p2, p3);
  	} else if (0 == strcmp(cmd, "del_tx")) {
  		if (rc < 3)
  			p2 = WLAN_REASON_QSTA_LEAVE_QBSS;
  		wmi_delba_tx(wil, p1, p2);
  	} else if (0 == strcmp(cmd, "del_rx")) {
  		if (rc < 3) {
  			wil_err(wil,
  				"BACK: del_rx require at least 2 params\n");
  			return -EINVAL;
  		}
  		if (rc < 4)
  			p3 = WLAN_REASON_QSTA_LEAVE_QBSS;
  		wmi_delba_rx(wil, mk_cidxtid(p1, p2), p3);
  	} else {
  		wil_err(wil, "BACK: Unrecognized command \"%s\"\n", cmd);
  		return -EINVAL;
  	}
  
  	return len;
  }
  
  static ssize_t wil_read_back(struct file *file, char __user *user_buf,
  			     size_t count, loff_t *ppos)
  {
  	static const char text[] = "block ack control, write:\n"
  	" - \"add <ringid> <agg_size> <timeout>\" to trigger ADDBA\n"
  	"If missing, <timeout> defaults to 0\n"
  	" - \"del_tx <ringid> <reason>\" to trigger DELBA for Tx side\n"
  	" - \"del_rx <CID> <TID> <reason>\" to trigger DELBA for Rx side\n"
  	"If missing, <reason> set to \"STA_LEAVING\" (36)\n";
  
  	return simple_read_from_buffer(user_buf, count, ppos, text,
  				       sizeof(text));
  }
  
  static const struct file_operations fops_back = {
  	.read = wil_read_back,
  	.write = wil_write_back,
  	.open  = simple_open,
  };
  
  /* pmc control, write:
   * - "alloc <num descriptors> <descriptor_size>" to allocate PMC
   * - "free" to release memory allocated for PMC
   */
  static ssize_t wil_write_pmccfg(struct file *file, const char __user *buf,
  				size_t len, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	int rc;
  	char *kbuf = kmalloc(len + 1, GFP_KERNEL);
  	char cmd[9];
  	int num_descs, desc_size;
  
  	if (!kbuf)
  		return -ENOMEM;
  
  	rc = simple_write_to_buffer(kbuf, len, ppos, buf, len);
  	if (rc != len) {
  		kfree(kbuf);
  		return rc >= 0 ? -EIO : rc;
  	}
  
  	kbuf[len] = '\0';
  	rc = sscanf(kbuf, "%8s %d %d", cmd, &num_descs, &desc_size);
  	kfree(kbuf);
  
  	if (rc < 0)
  		return rc;
  
  	if (rc < 1) {
  		wil_err(wil, "pmccfg: no params given\n");
  		return -EINVAL;
  	}
  
  	if (0 == strcmp(cmd, "alloc")) {
  		if (rc != 3) {
  			wil_err(wil, "pmccfg: alloc requires 2 params\n");
  			return -EINVAL;
  		}
  		wil_pmc_alloc(wil, num_descs, desc_size);
  	} else if (0 == strcmp(cmd, "free")) {
  		if (rc != 1) {
  			wil_err(wil, "pmccfg: free does not have any params\n");
  			return -EINVAL;
  		}
  		wil_pmc_free(wil, true);
  	} else {
  		wil_err(wil, "pmccfg: Unrecognized command \"%s\"\n", cmd);
  		return -EINVAL;
  	}
  
  	return len;
  }
  
  static ssize_t wil_read_pmccfg(struct file *file, char __user *user_buf,
  			       size_t count, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	char text[256];
  	char help[] = "pmc control, write:\n"
  	" - \"alloc <num descriptors> <descriptor_size>\" to allocate pmc\n"
  	" - \"free\" to free memory allocated for pmc\n";
  
  	sprintf(text, "Last command status: %d\n\n%s",
  		wil_pmc_last_cmd_status(wil),
  		help);
  
  	return simple_read_from_buffer(user_buf, count, ppos, text,
  				       strlen(text) + 1);
  }
  
  static const struct file_operations fops_pmccfg = {
  	.read = wil_read_pmccfg,
  	.write = wil_write_pmccfg,
  	.open  = simple_open,
  };
  
  static const struct file_operations fops_pmcdata = {
  	.open		= simple_open,
  	.read		= wil_pmc_read,
  	.llseek		= wil_pmc_llseek,
  };
  
  /*---tx_mgmt---*/
  /* Write mgmt frame to this file to send it */
  static ssize_t wil_write_file_txmgmt(struct file *file, const char __user *buf,
  				     size_t len, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	struct wiphy *wiphy = wil_to_wiphy(wil);
  	struct wireless_dev *wdev = wil_to_wdev(wil);
  	struct cfg80211_mgmt_tx_params params;
  	int rc;
  	void *frame = kmalloc(len, GFP_KERNEL);
  
  	if (!frame)
  		return -ENOMEM;
  
  	if (copy_from_user(frame, buf, len)) {
  		kfree(frame);
  		return -EIO;
  	}
  
  	params.buf = frame;
  	params.len = len;
  	params.chan = wdev->preset_chandef.chan;
  
  	rc = wil_cfg80211_mgmt_tx(wiphy, wdev, &params, NULL);
  
  	kfree(frame);
  	wil_info(wil, "%s() -> %d\n", __func__, rc);
  
  	return len;
  }
  
  static const struct file_operations fops_txmgmt = {
  	.write = wil_write_file_txmgmt,
  	.open  = simple_open,
  };
  
  /* Write WMI command (w/o mbox header) to this file to send it
   * WMI starts from wil6210_mbox_hdr_wmi header
   */
  static ssize_t wil_write_file_wmi(struct file *file, const char __user *buf,
  				  size_t len, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	struct wil6210_mbox_hdr_wmi *wmi;
  	void *cmd;
  	int cmdlen = len - sizeof(struct wil6210_mbox_hdr_wmi);
  	u16 cmdid;
  	int rc, rc1;
  
  	if (cmdlen <= 0)
  		return -EINVAL;
  
  	wmi = kmalloc(len, GFP_KERNEL);
  	if (!wmi)
  		return -ENOMEM;
  
  	rc = simple_write_to_buffer(wmi, len, ppos, buf, len);
  	if (rc < 0) {
  		kfree(wmi);
  		return rc;
  	}
  
  	cmd = &wmi[1];
  	cmdid = le16_to_cpu(wmi->id);
  
  	rc1 = wmi_send(wil, cmdid, cmd, cmdlen);
  	kfree(wmi);
  
  	wil_info(wil, "%s(0x%04x[%d]) -> %d\n", __func__, cmdid, cmdlen, rc1);
  
  	return rc;
  }
  
  static const struct file_operations fops_wmi = {
  	.write = wil_write_file_wmi,
  	.open  = simple_open,
  };
  
  static void wil_seq_print_skb(struct seq_file *s, struct sk_buff *skb)
  {
  	int i = 0;
  	int len = skb_headlen(skb);
  	void *p = skb->data;
  	int nr_frags = skb_shinfo(skb)->nr_frags;
  
  	seq_printf(s, "    len = %d\n", len);
  	wil_seq_hexdump(s, p, len, "      : ");
  
  	if (nr_frags) {
  		seq_printf(s, "    nr_frags = %d\n", nr_frags);
  		for (i = 0; i < nr_frags; i++) {
  			const struct skb_frag_struct *frag =
  					&skb_shinfo(skb)->frags[i];
  
  			len = skb_frag_size(frag);
  			p = skb_frag_address_safe(frag);
  			seq_printf(s, "    [%2d] : len = %d\n", i, len);
  			wil_seq_hexdump(s, p, len, "      : ");
  		}
  	}
  }
  
  /*---------Tx/Rx descriptor------------*/
  static int wil_txdesc_debugfs_show(struct seq_file *s, void *data)
  {
  	struct wil6210_priv *wil = s->private;
  	struct vring *vring;
  	bool tx = (dbg_vring_index < WIL6210_MAX_TX_RINGS);
  
  	vring = tx ? &wil->vring_tx[dbg_vring_index] : &wil->vring_rx;
  
  	if (!vring->va) {
  		if (tx)
  			seq_printf(s, "No Tx[%2d] VRING\n", dbg_vring_index);
  		else
  			seq_puts(s, "No Rx VRING\n");
  		return 0;
  	}
  
  	if (dbg_txdesc_index < vring->size) {
  		/* use struct vring_tx_desc for Rx as well,
  		 * only field used, .dma.length, is the same
  		 */
  		volatile struct vring_tx_desc *d =
  				&vring->va[dbg_txdesc_index].tx;
  		volatile u32 *u = (volatile u32 *)d;
  		struct sk_buff *skb = vring->ctx[dbg_txdesc_index].skb;
  
  		if (tx)
  			seq_printf(s, "Tx[%2d][%3d] = {\n", dbg_vring_index,
  				   dbg_txdesc_index);
  		else
  			seq_printf(s, "Rx[%3d] = {\n", dbg_txdesc_index);
  		seq_printf(s, "  MAC = 0x%08x 0x%08x 0x%08x 0x%08x\n",
  			   u[0], u[1], u[2], u[3]);
  		seq_printf(s, "  DMA = 0x%08x 0x%08x 0x%08x 0x%08x\n",
  			   u[4], u[5], u[6], u[7]);
  		seq_printf(s, "  SKB = 0x%p\n", skb);
  
  		if (skb) {
  			skb_get(skb);
  			wil_seq_print_skb(s, skb);
  			kfree_skb(skb);
  		}
  		seq_puts(s, "}\n");
  	} else {
  		if (tx)
  			seq_printf(s, "[%2d] TxDesc index (%d) >= size (%d)\n",
  				   dbg_vring_index, dbg_txdesc_index,
  				   vring->size);
  		else
  			seq_printf(s, "RxDesc index (%d) >= size (%d)\n",
  				   dbg_txdesc_index, vring->size);
  	}
  
  	return 0;
  }
  
  static int wil_txdesc_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_txdesc_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_txdesc = {
  	.open		= wil_txdesc_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  /*---------beamforming------------*/
  static char *wil_bfstatus_str(u32 status)
  {
  	switch (status) {
  	case 0:
  		return "Failed";
  	case 1:
  		return "OK";
  	case 2:
  		return "Retrying";
  	default:
  		return "??";
  	}
  }
  
  static bool is_all_zeros(void * const x_, size_t sz)
  {
  	/* if reply is all-0, ignore this CID */
  	u32 *x = x_;
  	int n;
  
  	for (n = 0; n < sz / sizeof(*x); n++)
  		if (x[n])
  			return false;
  
  	return true;
  }
  
  static int wil_bf_debugfs_show(struct seq_file *s, void *data)
  {
  	int rc;
  	int i;
  	struct wil6210_priv *wil = s->private;
  	struct wmi_notify_req_cmd cmd = {
  		.interval_usec = 0,
  	};
  	struct {
  		struct wil6210_mbox_hdr_wmi wmi;
  		struct wmi_notify_req_done_event evt;
  	} __packed reply;
  
  	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
  		u32 status;
  
  		cmd.cid = i;
  		rc = wmi_call(wil, WMI_NOTIFY_REQ_CMDID, &cmd, sizeof(cmd),
  			      WMI_NOTIFY_REQ_DONE_EVENTID, &reply,
  			      sizeof(reply), 20);
  		/* if reply is all-0, ignore this CID */
  		if (rc || is_all_zeros(&reply.evt, sizeof(reply.evt)))
  			continue;
  
  		status = le32_to_cpu(reply.evt.status);
  		seq_printf(s, "CID %d {\n"
  			   "  TSF = 0x%016llx\n"
  			   "  TxMCS = %2d TxTpt = %4d\n"
  			   "  SQI = %4d\n"
  			   "  Status = 0x%08x %s\n"
  			   "  Sectors(rx:tx) my %2d:%2d peer %2d:%2d\n"
  			   "  Goodput(rx:tx) %4d:%4d\n"
  			   "}\n",
  			   i,
  			   le64_to_cpu(reply.evt.tsf),
  			   le16_to_cpu(reply.evt.bf_mcs),
  			   le32_to_cpu(reply.evt.tx_tpt),
  			   reply.evt.sqi,
  			   status, wil_bfstatus_str(status),
  			   le16_to_cpu(reply.evt.my_rx_sector),
  			   le16_to_cpu(reply.evt.my_tx_sector),
  			   le16_to_cpu(reply.evt.other_rx_sector),
  			   le16_to_cpu(reply.evt.other_tx_sector),
  			   le32_to_cpu(reply.evt.rx_goodput),
  			   le32_to_cpu(reply.evt.tx_goodput));
  	}
  	return 0;
  }
  
  static int wil_bf_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_bf_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_bf = {
  	.open		= wil_bf_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  /*---------SSID------------*/
  static ssize_t wil_read_file_ssid(struct file *file, char __user *user_buf,
  				  size_t count, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	struct wireless_dev *wdev = wil_to_wdev(wil);
  
  	return simple_read_from_buffer(user_buf, count, ppos,
  				       wdev->ssid, wdev->ssid_len);
  }
  
  static ssize_t wil_write_file_ssid(struct file *file, const char __user *buf,
  				   size_t count, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	struct wireless_dev *wdev = wil_to_wdev(wil);
  	struct net_device *ndev = wil_to_ndev(wil);
  
  	if (*ppos != 0) {
  		wil_err(wil, "Unable to set SSID substring from [%d]\n",
  			(int)*ppos);
  		return -EINVAL;
  	}
  
  	if (count > sizeof(wdev->ssid)) {
  		wil_err(wil, "SSID too long, len = %d\n", (int)count);
  		return -EINVAL;
  	}
  	if (netif_running(ndev)) {
  		wil_err(wil, "Unable to change SSID on running interface\n");
  		return -EINVAL;
  	}
  
  	wdev->ssid_len = count;
  	return simple_write_to_buffer(wdev->ssid, wdev->ssid_len, ppos,
  				      buf, count);
  }
  
  static const struct file_operations fops_ssid = {
  	.read = wil_read_file_ssid,
  	.write = wil_write_file_ssid,
  	.open  = simple_open,
  };
  
  /*---------temp------------*/
  static void print_temp(struct seq_file *s, const char *prefix, u32 t)
  {
  	switch (t) {
  	case 0:
  	case ~(u32)0:
  		seq_printf(s, "%s N/A\n", prefix);
  	break;
  	default:
  		seq_printf(s, "%s %d.%03d\n", prefix, t / 1000, t % 1000);
  		break;
  	}
  }
  
  static int wil_temp_debugfs_show(struct seq_file *s, void *data)
  {
  	struct wil6210_priv *wil = s->private;
  	u32 t_m, t_r;
  	int rc = wmi_get_temperature(wil, &t_m, &t_r);
  
  	if (rc) {
  		seq_puts(s, "Failed\n");
  		return 0;
  	}
  
  	print_temp(s, "T_mac   =", t_m);
  	print_temp(s, "T_radio =", t_r);
  
  	return 0;
  }
  
  static int wil_temp_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_temp_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_temp = {
  	.open		= wil_temp_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  /*---------freq------------*/
  static int wil_freq_debugfs_show(struct seq_file *s, void *data)
  {
  	struct wil6210_priv *wil = s->private;
  	struct wireless_dev *wdev = wil_to_wdev(wil);
  	u16 freq = wdev->chandef.chan ? wdev->chandef.chan->center_freq : 0;
  
  	seq_printf(s, "Freq = %d\n", freq);
  
  	return 0;
  }
  
  static int wil_freq_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_freq_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_freq = {
  	.open		= wil_freq_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  /*---------link------------*/
  static int wil_link_debugfs_show(struct seq_file *s, void *data)
  {
  	struct wil6210_priv *wil = s->private;
  	struct station_info sinfo;
  	int i, rc;
  
  	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
  		struct wil_sta_info *p = &wil->sta[i];
  		char *status = "unknown";
  
  		switch (p->status) {
  		case wil_sta_unused:
  			status = "unused   ";
  			break;
  		case wil_sta_conn_pending:
  			status = "pending  ";
  			break;
  		case wil_sta_connected:
  			status = "connected";
  			break;
  		}
  		seq_printf(s, "[%d] %pM %s\n", i, p->addr, status);
  
  		if (p->status == wil_sta_connected) {
  			rc = wil_cid_fill_sinfo(wil, i, &sinfo);
  			if (rc)
  				return rc;
  
  			seq_printf(s, "  Tx_mcs = %d\n", sinfo.txrate.mcs);
  			seq_printf(s, "  Rx_mcs = %d\n", sinfo.rxrate.mcs);
  			seq_printf(s, "  SQ     = %d\n", sinfo.signal);
  		}
  	}
  
  	return 0;
  }
  
  static int wil_link_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_link_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_link = {
  	.open		= wil_link_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  /*---------info------------*/
  static int wil_info_debugfs_show(struct seq_file *s, void *data)
  {
  	struct wil6210_priv *wil = s->private;
  	struct net_device *ndev = wil_to_ndev(wil);
  	int is_ac = power_supply_is_system_supplied();
  	int rx = atomic_xchg(&wil->isr_count_rx, 0);
  	int tx = atomic_xchg(&wil->isr_count_tx, 0);
  	static ulong rxf_old, txf_old;
  	ulong rxf = ndev->stats.rx_packets;
  	ulong txf = ndev->stats.tx_packets;
  	unsigned int i;
  
  	/* >0 : AC; 0 : battery; <0 : error */
  	seq_printf(s, "AC powered : %d\n", is_ac);
  	seq_printf(s, "Rx irqs:packets : %8d : %8ld\n", rx, rxf - rxf_old);
  	seq_printf(s, "Tx irqs:packets : %8d : %8ld\n", tx, txf - txf_old);
  	rxf_old = rxf;
  	txf_old = txf;
  
  #define CHECK_QSTATE(x) (state & BIT(__QUEUE_STATE_ ## x)) ? \
  	" " __stringify(x) : ""
  
  	for (i = 0; i < ndev->num_tx_queues; i++) {
  		struct netdev_queue *txq = netdev_get_tx_queue(ndev, i);
  		unsigned long state = txq->state;
  
  		seq_printf(s, "Tx queue[%i] state : 0x%lx%s%s%s\n", i, state,
  			   CHECK_QSTATE(DRV_XOFF),
  			   CHECK_QSTATE(STACK_XOFF),
  			   CHECK_QSTATE(FROZEN)
  			  );
  	}
  #undef CHECK_QSTATE
  	return 0;
  }
  
  static int wil_info_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_info_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_info = {
  	.open		= wil_info_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  /*---------recovery------------*/
  /* mode = [manual|auto]
   * state = [idle|pending|running]
   */
  static ssize_t wil_read_file_recovery(struct file *file, char __user *user_buf,
  				      size_t count, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	char buf[80];
  	int n;
  	static const char * const sstate[] = {"idle", "pending", "running"};
  
  	n = snprintf(buf, sizeof(buf), "mode = %s\nstate = %s\n",
  		     no_fw_recovery ? "manual" : "auto",
  		     sstate[wil->recovery_state]);
  
  	n = min_t(int, n, sizeof(buf));
  
  	return simple_read_from_buffer(user_buf, count, ppos,
  				       buf, n);
  }
  
  static ssize_t wil_write_file_recovery(struct file *file,
  				       const char __user *buf_,
  				       size_t count, loff_t *ppos)
  {
  	struct wil6210_priv *wil = file->private_data;
  	static const char run_command[] = "run";
  	char buf[sizeof(run_command) + 1]; /* to detect "runx" */
  	ssize_t rc;
  
  	if (wil->recovery_state != fw_recovery_pending) {
  		wil_err(wil, "No recovery pending\n");
  		return -EINVAL;
  	}
  
  	if (*ppos != 0) {
  		wil_err(wil, "Offset [%d]\n", (int)*ppos);
  		return -EINVAL;
  	}
  
  	if (count > sizeof(buf)) {
  		wil_err(wil, "Input too long, len = %d\n", (int)count);
  		return -EINVAL;
  	}
  
  	rc = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, buf_, count);
  	if (rc < 0)
  		return rc;
  
  	buf[rc] = '\0';
  	if (0 == strcmp(buf, run_command))
  		wil_set_recovery_state(wil, fw_recovery_running);
  	else
  		wil_err(wil, "Bad recovery command \"%s\"\n", buf);
  
  	return rc;
  }
  
  static const struct file_operations fops_recovery = {
  	.read = wil_read_file_recovery,
  	.write = wil_write_file_recovery,
  	.open  = simple_open,
  };
  
  /*---------Station matrix------------*/
  static void wil_print_rxtid(struct seq_file *s, struct wil_tid_ampdu_rx *r)
  {
  	int i;
  	u16 index = ((r->head_seq_num - r->ssn) & 0xfff) % r->buf_size;
  	unsigned long long drop_dup = r->drop_dup, drop_old = r->drop_old;
  
  	seq_printf(s, "([%2d] %3d TU) 0x%03x [", r->buf_size, r->timeout,
  		   r->head_seq_num);
  	for (i = 0; i < r->buf_size; i++) {
  		if (i == index)
  			seq_printf(s, "%c", r->reorder_buf[i] ? 'O' : '|');
  		else
  			seq_printf(s, "%c", r->reorder_buf[i] ? '*' : '_');
  	}
  	seq_printf(s,
  		   "] total %llu drop %llu (dup %llu + old %llu) last 0x%03x\n",
  		   r->total, drop_dup + drop_old, drop_dup, drop_old,
  		   r->ssn_last_drop);
  }
  
  static int wil_sta_debugfs_show(struct seq_file *s, void *data)
  __acquires(&p->tid_rx_lock) __releases(&p->tid_rx_lock)
  {
  	struct wil6210_priv *wil = s->private;
  	int i, tid, mcs;
  
  	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
  		struct wil_sta_info *p = &wil->sta[i];
  		char *status = "unknown";
  
  		switch (p->status) {
  		case wil_sta_unused:
  			status = "unused   ";
  			break;
  		case wil_sta_conn_pending:
  			status = "pending  ";
  			break;
  		case wil_sta_connected:
  			status = "connected";
  			break;
  		}
  		seq_printf(s, "[%d] %pM %s\n", i, p->addr, status);
  
  		if (p->status == wil_sta_connected) {
  			spin_lock_bh(&p->tid_rx_lock);
  			for (tid = 0; tid < WIL_STA_TID_NUM; tid++) {
  				struct wil_tid_ampdu_rx *r = p->tid_rx[tid];
  
  				if (r) {
  					seq_printf(s, "[%2d] ", tid);
  					wil_print_rxtid(s, r);
  				}
  			}
  			spin_unlock_bh(&p->tid_rx_lock);
  			seq_puts(s, "Rx/MCS:");
  			for (mcs = 0; mcs < ARRAY_SIZE(p->stats.rx_per_mcs);
  			     mcs++)
  				seq_printf(s, " %lld",
  					   p->stats.rx_per_mcs[mcs]);
  			seq_puts(s, "\n");
  		}
  	}
  
  	return 0;
  }
  
  static int wil_sta_seq_open(struct inode *inode, struct file *file)
  {
  	return single_open(file, wil_sta_debugfs_show, inode->i_private);
  }
  
  static const struct file_operations fops_sta = {
  	.open		= wil_sta_seq_open,
  	.release	= single_release,
  	.read		= seq_read,
  	.llseek		= seq_lseek,
  };
  
  /*----------------*/
  static void wil6210_debugfs_init_blobs(struct wil6210_priv *wil,
  				       struct dentry *dbg)
  {
  	int i;
  	char name[32];
  
  	for (i = 0; i < ARRAY_SIZE(fw_mapping); i++) {
  		struct debugfs_blob_wrapper *blob = &wil->blobs[i];
  		const struct fw_map *map = &fw_mapping[i];
  
  		if (!map->name)
  			continue;
  
  		blob->data = (void * __force)wil->csr + HOSTADDR(map->host);
  		blob->size = map->to - map->from;
  		snprintf(name, sizeof(name), "blob_%s", map->name);
  		wil_debugfs_create_ioblob(name, S_IRUGO, dbg, blob);
  	}
  }
  
  /* misc files */
  static const struct {
  	const char *name;
  	umode_t mode;
  	const struct file_operations *fops;
  } dbg_files[] = {
  	{"mbox",	S_IRUGO,		&fops_mbox},
  	{"vrings",	S_IRUGO,		&fops_vring},
  	{"stations",	S_IRUGO,		&fops_sta},
  	{"desc",	S_IRUGO,		&fops_txdesc},
  	{"bf",		S_IRUGO,		&fops_bf},
  	{"ssid",	S_IRUGO | S_IWUSR,	&fops_ssid},
  	{"mem_val",	S_IRUGO,		&fops_memread},
  	{"reset",		  S_IWUSR,	&fops_reset},
  	{"rxon",		  S_IWUSR,	&fops_rxon},
  	{"tx_mgmt",		  S_IWUSR,	&fops_txmgmt},
  	{"wmi_send",		  S_IWUSR,	&fops_wmi},
  	{"back",	S_IRUGO | S_IWUSR,	&fops_back},
  	{"pmccfg",	S_IRUGO | S_IWUSR,	&fops_pmccfg},
  	{"pmcdata",	S_IRUGO,		&fops_pmcdata},
  	{"temp",	S_IRUGO,		&fops_temp},
  	{"freq",	S_IRUGO,		&fops_freq},
  	{"link",	S_IRUGO,		&fops_link},
  	{"info",	S_IRUGO,		&fops_info},
  	{"recovery",	S_IRUGO | S_IWUSR,	&fops_recovery},
  };
  
  static void wil6210_debugfs_init_files(struct wil6210_priv *wil,
  				       struct dentry *dbg)
  {
  	int i;
  
  	for (i = 0; i < ARRAY_SIZE(dbg_files); i++)
  		debugfs_create_file(dbg_files[i].name, dbg_files[i].mode, dbg,
  				    wil, dbg_files[i].fops);
  }
  
  /* interrupt control blocks */
  static const struct {
  	const char *name;
  	u32 icr_off;
  } dbg_icr[] = {
  	{"USER_ICR",		HOSTADDR(RGF_USER_USER_ICR)},
  	{"DMA_EP_TX_ICR",	HOSTADDR(RGF_DMA_EP_TX_ICR)},
  	{"DMA_EP_RX_ICR",	HOSTADDR(RGF_DMA_EP_RX_ICR)},
  	{"DMA_EP_MISC_ICR",	HOSTADDR(RGF_DMA_EP_MISC_ICR)},
  };
  
  static void wil6210_debugfs_init_isr(struct wil6210_priv *wil,
  				     struct dentry *dbg)
  {
  	int i;
  
  	for (i = 0; i < ARRAY_SIZE(dbg_icr); i++)
  		wil6210_debugfs_create_ISR(wil, dbg_icr[i].name, dbg,
  					   dbg_icr[i].icr_off);
  }
  
  #define WIL_FIELD(name, mode, type) { __stringify(name), mode, \
  	offsetof(struct wil6210_priv, name), type}
  
  /* fields in struct wil6210_priv */
  static const struct dbg_off dbg_wil_off[] = {
  	WIL_FIELD(privacy,	S_IRUGO,		doff_u32),
  	WIL_FIELD(status[0],	S_IRUGO | S_IWUSR,	doff_ulong),
  	WIL_FIELD(fw_version,	S_IRUGO,		doff_u32),
  	WIL_FIELD(hw_version,	S_IRUGO,		doff_x32),
  	WIL_FIELD(recovery_count, S_IRUGO,		doff_u32),
  	WIL_FIELD(ap_isolate,	S_IRUGO,		doff_u32),
  	{},
  };
  
  static const struct dbg_off dbg_wil_regs[] = {
  	{"RGF_MAC_MTRL_COUNTER_0", S_IRUGO, HOSTADDR(RGF_MAC_MTRL_COUNTER_0),
  		doff_io32},
  	{"RGF_USER_USAGE_1", S_IRUGO, HOSTADDR(RGF_USER_USAGE_1), doff_io32},
  	{},
  };
  
  /* static parameters */
  static const struct dbg_off dbg_statics[] = {
  	{"desc_index",	S_IRUGO | S_IWUSR, (ulong)&dbg_txdesc_index, doff_u32},
  	{"vring_index",	S_IRUGO | S_IWUSR, (ulong)&dbg_vring_index, doff_u32},
  	{"mem_addr",	S_IRUGO | S_IWUSR, (ulong)&mem_addr, doff_u32},
  	{"vring_idle_trsh", S_IRUGO | S_IWUSR, (ulong)&vring_idle_trsh,
  	 doff_u32},
  	{},
  };
  
  int wil6210_debugfs_init(struct wil6210_priv *wil)
  {
  	struct dentry *dbg = wil->debug = debugfs_create_dir(WIL_NAME,
  			wil_to_wiphy(wil)->debugfsdir);
  
  	if (IS_ERR_OR_NULL(dbg))
  		return -ENODEV;
  
  	wil_pmc_init(wil);
  
  	wil6210_debugfs_init_files(wil, dbg);
  	wil6210_debugfs_init_isr(wil, dbg);
  	wil6210_debugfs_init_blobs(wil, dbg);
  	wil6210_debugfs_init_offset(wil, dbg, wil, dbg_wil_off);
  	wil6210_debugfs_init_offset(wil, dbg, (void * __force)wil->csr,
  				    dbg_wil_regs);
  	wil6210_debugfs_init_offset(wil, dbg, NULL, dbg_statics);
  
  	wil6210_debugfs_create_pseudo_ISR(wil, dbg);
  
  	wil6210_debugfs_create_ITR_CNT(wil, dbg);
  
  	return 0;
  }
  
  void wil6210_debugfs_remove(struct wil6210_priv *wil)
  {
  	debugfs_remove_recursive(wil->debug);
  	wil->debug = NULL;
  
  	/* free pmc memory without sending command to fw, as it will
  	 * be reset on the way down anyway
  	 */
  	wil_pmc_free(wil, false);
  }
  