lpfc_debugfs.c

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#ifdef CONFIG_LPFC_DEBUG_FS
	struct lpfc_debugfs_trc *dtp;
	int index;

	if (!lpfc_debugfs_enable || !lpfc_debugfs_max_slow_ring_trc ||
		!phba || !phba->slow_ring_trc)
		return;

	index = atomic_inc_return(&phba->slow_ring_trc_cnt) &
		(lpfc_debugfs_max_slow_ring_trc - 1);
	dtp = phba->slow_ring_trc + index;
	dtp->fmt = fmt;
	dtp->data1 = data1;
	dtp->data2 = data2;
	dtp->data3 = data3;
	dtp->seq_cnt = atomic_inc_return(&lpfc_debugfs_seq_trc_cnt);
	dtp->jif = jiffies;
#endif
	return;
}

#ifdef CONFIG_LPFC_DEBUG_FS
static int
lpfc_debugfs_disc_trc_open(struct inode *inode, struct file *file)
{
	struct lpfc_vport *vport = inode->i_private;
	struct lpfc_debug *debug;
	int size;
	int rc = -ENOMEM;

	if (!lpfc_debugfs_max_disc_trc) {
		 rc = -ENOSPC;
		goto out;
	}

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundry */
	size =  (lpfc_debugfs_max_disc_trc * LPFC_DEBUG_TRC_ENTRY_SIZE);
	size = PAGE_ALIGN(size);

	debug->buffer = kmalloc(size, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_disc_trc_data(vport, debug->buffer, size);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

static int
lpfc_debugfs_slow_ring_trc_open(struct inode *inode, struct file *file)
{
	struct lpfc_hba *phba = inode->i_private;
	struct lpfc_debug *debug;
	int size;
	int rc = -ENOMEM;

	if (!lpfc_debugfs_max_slow_ring_trc) {
		 rc = -ENOSPC;
		goto out;
	}

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundry */
	size =  (lpfc_debugfs_max_slow_ring_trc * LPFC_DEBUG_TRC_ENTRY_SIZE);
	size = PAGE_ALIGN(size);

	debug->buffer = kmalloc(size, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_slow_ring_trc_data(phba, debug->buffer, size);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

static int
lpfc_debugfs_hbqinfo_open(struct inode *inode, struct file *file)
{
	struct lpfc_hba *phba = inode->i_private;
	struct lpfc_debug *debug;
	int rc = -ENOMEM;

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundry */
	debug->buffer = kmalloc(LPFC_HBQINFO_SIZE, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_hbqinfo_data(phba, debug->buffer,
		LPFC_HBQINFO_SIZE);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

static int
lpfc_debugfs_dumpslim_open(struct inode *inode, struct file *file)
{
	struct lpfc_hba *phba = inode->i_private;
	struct lpfc_debug *debug;
	int rc = -ENOMEM;

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundry */
	debug->buffer = kmalloc(LPFC_DUMPSLIM_SIZE, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_dumpslim_data(phba, debug->buffer,
		LPFC_DUMPSLIM_SIZE);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

static int
lpfc_debugfs_nodelist_open(struct inode *inode, struct file *file)
{
	struct lpfc_vport *vport = inode->i_private;
	struct lpfc_debug *debug;
	int rc = -ENOMEM;

	debug = kmalloc(sizeof(*debug), GFP_KERNEL);
	if (!debug)
		goto out;

	/* Round to page boundry */
	debug->buffer = kmalloc(LPFC_NODELIST_SIZE, GFP_KERNEL);
	if (!debug->buffer) {
		kfree(debug);
		goto out;
	}

	debug->len = lpfc_debugfs_nodelist_data(vport, debug->buffer,
		LPFC_NODELIST_SIZE);
	file->private_data = debug;

	rc = 0;
out:
	return rc;
}

static loff_t
lpfc_debugfs_lseek(struct file *file, loff_t off, int whence)
{
	struct lpfc_debug *debug;
	loff_t pos = -1;

	debug = file->private_data;

	switch (whence) {
	case 0:
		pos = off;
		break;
	case 1:
		pos = file->f_pos + off;
		break;
	case 2:
		pos = debug->len - off;
	}
	return (pos < 0 || pos > debug->len) ? -EINVAL : (file->f_pos = pos);
}

static ssize_t
lpfc_debugfs_read(struct file *file, char __user *buf,
		  size_t nbytes, loff_t *ppos)
{
	struct lpfc_debug *debug = file->private_data;
	return simple_read_from_buffer(buf, nbytes, ppos, debug->buffer,
				       debug->len);
}

static int
lpfc_debugfs_release(struct inode *inode, struct file *file)
{
	struct lpfc_debug *debug = file->private_data;

	kfree(debug->buffer);
	kfree(debug);

	return 0;
}

#undef lpfc_debugfs_op_disc_trc
static struct file_operations lpfc_debugfs_op_disc_trc = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_disc_trc_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

#undef lpfc_debugfs_op_nodelist
static struct file_operations lpfc_debugfs_op_nodelist = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_nodelist_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

#undef lpfc_debugfs_op_hbqinfo
static struct file_operations lpfc_debugfs_op_hbqinfo = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_hbqinfo_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

#undef lpfc_debugfs_op_dumpslim
static struct file_operations lpfc_debugfs_op_dumpslim = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_dumpslim_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

#undef lpfc_debugfs_op_slow_ring_trc
static struct file_operations lpfc_debugfs_op_slow_ring_trc = {
	.owner =        THIS_MODULE,
	.open =         lpfc_debugfs_slow_ring_trc_open,
	.llseek =       lpfc_debugfs_lseek,
	.read =         lpfc_debugfs_read,
	.release =      lpfc_debugfs_release,
};

static struct dentry *lpfc_debugfs_root = NULL;
static atomic_t lpfc_debugfs_hba_count;
#endif

inline void
lpfc_debugfs_initialize(struct lpfc_vport *vport)
{
#ifdef CONFIG_LPFC_DEBUG_FS
	struct lpfc_hba   *phba = vport->phba;
	char name[64];
	uint32_t num, i;

	if (!lpfc_debugfs_enable)
		return;

	/* Setup lpfc root directory */
	if (!lpfc_debugfs_root) {
		lpfc_debugfs_root = debugfs_create_dir("lpfc", NULL);
		atomic_set(&lpfc_debugfs_hba_count, 0);
		if (!lpfc_debugfs_root) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
					 "0409 Cannot create debugfs root\n");
			goto debug_failed;
		}
	}
	if (!lpfc_debugfs_start_time)
		lpfc_debugfs_start_time = jiffies;

	/* Setup lpfcX directory for specific HBA */
	snprintf(name, sizeof(name), "lpfc%d", phba->brd_no);
	if (!phba->hba_debugfs_root) {
		phba->hba_debugfs_root =
			debugfs_create_dir(name, lpfc_debugfs_root);
		if (!phba->hba_debugfs_root) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
					 "0409 Cannot create debugfs hba\n");
			goto debug_failed;
		}
		atomic_inc(&lpfc_debugfs_hba_count);
		atomic_set(&phba->debugfs_vport_count, 0);

		/* Setup hbqinfo */
		snprintf(name, sizeof(name), "hbqinfo");
		phba->debug_hbqinfo =
			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 phba->hba_debugfs_root,
				 phba, &lpfc_debugfs_op_hbqinfo);
		if (!phba->debug_hbqinfo) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				"0409 Cannot create debugfs hbqinfo\n");
			goto debug_failed;
		}

		/* Setup dumpslim */
		snprintf(name, sizeof(name), "dumpslim");
		phba->debug_dumpslim =
			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 phba->hba_debugfs_root,
				 phba, &lpfc_debugfs_op_dumpslim);
		if (!phba->debug_dumpslim) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				"0409 Cannot create debugfs dumpslim\n");
			goto debug_failed;
		}

		/* Setup slow ring trace */
		if (lpfc_debugfs_max_slow_ring_trc) {
			num = lpfc_debugfs_max_slow_ring_trc - 1;
			if (num & lpfc_debugfs_max_slow_ring_trc) {
				/* Change to be a power of 2 */
				num = lpfc_debugfs_max_slow_ring_trc;
				i = 0;
				while (num > 1) {
					num = num >> 1;
					i++;
				}
				lpfc_debugfs_max_slow_ring_trc = (1 << i);
				printk(KERN_ERR
				       "lpfc_debugfs_max_disc_trc changed to "
				       "%d\n", lpfc_debugfs_max_disc_trc);
			}
		}


		snprintf(name, sizeof(name), "slow_ring_trace");
		phba->debug_slow_ring_trc =
			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 phba->hba_debugfs_root,
				 phba, &lpfc_debugfs_op_slow_ring_trc);
		if (!phba->debug_slow_ring_trc) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
					 "0409 Cannot create debugfs "
					 "slow_ring_trace\n");
			goto debug_failed;
		}
		if (!phba->slow_ring_trc) {
			phba->slow_ring_trc = kmalloc(
				(sizeof(struct lpfc_debugfs_trc) *
				lpfc_debugfs_max_slow_ring_trc),
				GFP_KERNEL);
			if (!phba->slow_ring_trc) {
				lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
						 "0409 Cannot create debugfs "
						 "slow_ring buffer\n");
				goto debug_failed;
			}
			atomic_set(&phba->slow_ring_trc_cnt, 0);
			memset(phba->slow_ring_trc, 0,
				(sizeof(struct lpfc_debugfs_trc) *
				lpfc_debugfs_max_slow_ring_trc));
		}
	}

	snprintf(name, sizeof(name), "vport%d", vport->vpi);
	if (!vport->vport_debugfs_root) {
		vport->vport_debugfs_root =
			debugfs_create_dir(name, phba->hba_debugfs_root);
		if (!vport->vport_debugfs_root) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
					 "0409 Cant create debugfs");
			goto debug_failed;
		}
		atomic_inc(&phba->debugfs_vport_count);
	}

	if (lpfc_debugfs_max_disc_trc) {
		num = lpfc_debugfs_max_disc_trc - 1;
		if (num & lpfc_debugfs_max_disc_trc) {
			/* Change to be a power of 2 */
			num = lpfc_debugfs_max_disc_trc;
			i = 0;
			while (num > 1) {
				num = num >> 1;
				i++;
			}
			lpfc_debugfs_max_disc_trc = (1 << i);
			printk(KERN_ERR
			       "lpfc_debugfs_max_disc_trc changed to %d\n",
			       lpfc_debugfs_max_disc_trc);
		}
	}

	vport->disc_trc = kzalloc(
		(sizeof(struct lpfc_debugfs_trc) * lpfc_debugfs_max_disc_trc),
		GFP_KERNEL);

	if (!vport->disc_trc) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				 "0409 Cannot create debugfs disc trace "
				 "buffer\n");
		goto debug_failed;
	}
	atomic_set(&vport->disc_trc_cnt, 0);

	snprintf(name, sizeof(name), "discovery_trace");
	vport->debug_disc_trc =
		debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 vport->vport_debugfs_root,
				 vport, &lpfc_debugfs_op_disc_trc);
	if (!vport->debug_disc_trc) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				 "0409 Cannot create debugfs "
				 "discovery_trace\n");
		goto debug_failed;
	}
	snprintf(name, sizeof(name), "nodelist");
	vport->debug_nodelist =
		debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
				 vport->vport_debugfs_root,
				 vport, &lpfc_debugfs_op_nodelist);
	if (!vport->debug_nodelist) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
				 "0409 Cant create debugfs nodelist");
		goto debug_failed;
	}
debug_failed:
	return;
#endif
}


inline void
lpfc_debugfs_terminate(struct lpfc_vport *vport)
{
#ifdef CONFIG_LPFC_DEBUG_FS
	struct lpfc_hba   *phba = vport->phba;

	if (vport->disc_trc) {
		kfree(vport->disc_trc);
		vport->disc_trc = NULL;
	}
	if (vport->debug_disc_trc) {
		debugfs_remove(vport->debug_disc_trc); /* discovery_trace */
		vport->debug_disc_trc = NULL;
	}
	if (vport->debug_nodelist) {
		debugfs_remove(vport->debug_nodelist); /* nodelist */
		vport->debug_nodelist = NULL;
	}

	if (vport->vport_debugfs_root) {
		debugfs_remove(vport->vport_debugfs_root); /* vportX */
		vport->vport_debugfs_root = NULL;
		atomic_dec(&phba->debugfs_vport_count);
	}
	if (atomic_read(&phba->debugfs_vport_count) == 0) {

		if (phba->debug_hbqinfo) {
			debugfs_remove(phba->debug_hbqinfo); /* hbqinfo */
			phba->debug_hbqinfo = NULL;
		}
		if (phba->debug_dumpslim) {
			debugfs_remove(phba->debug_dumpslim); /* dumpslim */
			phba->debug_dumpslim = NULL;
		}
		if (phba->slow_ring_trc) {
			kfree(phba->slow_ring_trc);
			phba->slow_ring_trc = NULL;
		}
		if (phba->debug_slow_ring_trc) {
			/* slow_ring_trace */
			debugfs_remove(phba->debug_slow_ring_trc);
			phba->debug_slow_ring_trc = NULL;
		}

		if (phba->hba_debugfs_root) {
			debugfs_remove(phba->hba_debugfs_root); /* lpfcX */
			phba->hba_debugfs_root = NULL;
			atomic_dec(&lpfc_debugfs_hba_count);
		}

		if (atomic_read(&lpfc_debugfs_hba_count) == 0) {
			debugfs_remove(lpfc_debugfs_root); /* lpfc */
			lpfc_debugfs_root = NULL;
		}
	}
#endif
	return;
}