This adds a file to dump the SHM.
Note that SHM dumping is racy, as the microcode continues to run
while we dump the SHM.
Cc: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Cc: Larry Finger <larry.finger@xxxxxxxxxxxx>
Signed-off-by: Michael Buesch <mb@xxxxxxxxx>
Index: wireless-dev/drivers/net/wireless/b43/debugfs.c
===================================================================
--- wireless-dev.orig/drivers/net/wireless/b43/debugfs.c 2007-08-31 17:32:28.000000000 +0200
+++ wireless-dev/drivers/net/wireless/b43/debugfs.c 2007-08-31 17:36:52.000000000 +0200
@@ -181,6 +181,42 @@ out:
return res;
}
+static ssize_t shm_read_file(struct file *file, char __user * userbuf,
+ size_t count, loff_t * ppos)
+{
+ struct b43_wldev *dev = file->private_data;
+ const size_t len = ARRAY_SIZE(big_buffer);
+ u8 *buf = big_buffer;
+ __le16 *le16buf = (__le16*)big_buffer;
+ size_t pos = 0;
+ ssize_t res;
+ unsigned long flags;
+ int i;
+ u16 tmp;
+
+ mutex_lock(&big_buffer_mutex);
+ mutex_lock(&dev->wl->mutex);
+ spin_lock_irqsave(&dev->wl->irq_lock, flags);
+ if (b43_status(dev) < B43_STAT_INITIALIZED) {
+ fappend("Board not initialized.\n");
+ goto out;
+ }
+
+ for (i = 0; i < 0x1000; i++) {
+ tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
+ le16buf[i] = cpu_to_le16(tmp);
+ pos += sizeof(tmp);
+ }
+
+out:
+ spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
+ mutex_unlock(&dev->wl->mutex);
+ res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
+ mutex_unlock(&big_buffer_mutex);
+
+ return res;
+}
+
static ssize_t txstat_read_file(struct file *file, char __user * userbuf,
size_t count, loff_t * ppos)
{
@@ -508,6 +544,11 @@ static struct file_operations ucode_regs
.open = open_file_generic,
};
+static struct file_operations shm_fops = {
+ .read = shm_read_file,
+ .open = open_file_generic,
+};
+
static struct file_operations txstat_fops = {
.read = txstat_read_file,
.write = write_file_dummy,
@@ -617,6 +658,10 @@ void b43_debugfs_add_device(struct b43_w
dev, &ucode_regs_fops);
if (IS_ERR(e->dentry_ucode_regs))
e->dentry_ucode_regs = NULL;
+ e->dentry_shm = debugfs_create_file("shm", 0400, e->subdir,
+ dev, &shm_fops);
+ if (IS_ERR(e->dentry_shm))
+ e->dentry_shm = NULL;
e->dentry_txstat = debugfs_create_file("tx_status", 0400, e->subdir,
dev, &txstat_fops);
if (IS_ERR(e->dentry_txstat))
@@ -650,6 +695,7 @@ void b43_debugfs_remove_device(struct b4
debugfs_remove(e->dentry_loctls);
debugfs_remove(e->dentry_tsf);
debugfs_remove(e->dentry_ucode_regs);
+ debugfs_remove(e->dentry_shm);
debugfs_remove(e->dentry_txstat);
debugfs_remove(e->dentry_restart);
debugfs_remove(e->dentry_txpower_g);
Index: wireless-dev/drivers/net/wireless/b43/debugfs.h
===================================================================
--- wireless-dev.orig/drivers/net/wireless/b43/debugfs.h 2007-08-31 17:32:09.000000000 +0200
+++ wireless-dev/drivers/net/wireless/b43/debugfs.h 2007-08-31 17:32:44.000000000 +0200
@@ -32,6 +32,7 @@ struct b43_dfsentry {
struct dentry *subdir;
struct dentry *dentry_tsf;
struct dentry *dentry_ucode_regs;
+ struct dentry *dentry_shm;
struct dentry *dentry_txstat;
struct dentry *dentry_txpower_g;
struct dentry *dentry_restart;
-
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