cxgb4: Add cxgb4_debugfs.c, move all debugfs code to new file

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 217 insertions, 92 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/Makefile b/drivers/net/ethernet/chelsio/cxgb4/Makefile
index 1df65c9..b852807 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/Makefile
+++ b/drivers/net/ethernet/chelsio/cxgb4/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_CHELSIO_T4) += cxgb4.o
 
 cxgb4-objs := cxgb4_main.o l2t.o t4_hw.o sge.o
 cxgb4-$(CONFIG_CHELSIO_T4_DCB) +=  cxgb4_dcb.o
+cxgb4-$(CONFIG_DEBUG_FS) += cxgb4_debugfs.o
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index 3c481b2..dad1ea9 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -1085,4 +1085,5 @@ void t4_db_dropped(struct adapter *adapter);
 int t4_fwaddrspace_write(struct adapter *adap, unsigned int mbox,
 			 u32 addr, u32 val);
 void t4_sge_decode_idma_state(struct adapter *adapter, int state);
+void t4_free_mem(void *addr);
 #endif /* __CXGB4_H__ */
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
new file mode 100644
index 0000000..e86b5fe
--- /dev/null
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
@@ -0,0 +1,158 @@
+/*
+ * This file is part of the Chelsio T4 Ethernet driver for Linux.
+ *
+ * Copyright (c) 2003-2014 Chelsio Communications, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+#include <linux/string_helpers.h>
+#include <linux/sort.h>
+
+#include "cxgb4.h"
+#include "t4_regs.h"
+#include "t4fw_api.h"
+#include "cxgb4_debugfs.h"
+#include "l2t.h"
+
+static ssize_t mem_read(struct file *file, char __user *buf, size_t count,
+			loff_t *ppos)
+{
+	loff_t pos = *ppos;
+	loff_t avail = file_inode(file)->i_size;
+	unsigned int mem = (uintptr_t)file->private_data & 3;
+	struct adapter *adap = file->private_data - mem;
+	__be32 *data;
+	int ret;
+
+	if (pos < 0)
+		return -EINVAL;
+	if (pos >= avail)
+		return 0;
+	if (count > avail - pos)
+		count = avail - pos;
+
+	data = t4_alloc_mem(count);
+	if (!data)
+		return -ENOMEM;
+
+	spin_lock(&adap->win0_lock);
+	ret = t4_memory_rw(adap, 0, mem, pos, count, data, T4_MEMORY_READ);
+	spin_unlock(&adap->win0_lock);
+	if (ret) {
+		t4_free_mem(data);
+		return ret;
+	}
+	ret = copy_to_user(buf, data, count);
+
+	t4_free_mem(data);
+	if (ret)
+		return -EFAULT;
+
+	*ppos = pos + count;
+	return count;
+}
+
+static const struct file_operations mem_debugfs_fops = {
+	.owner   = THIS_MODULE,
+	.open    = simple_open,
+	.read    = mem_read,
+	.llseek  = default_llseek,
+};
+
+static void add_debugfs_mem(struct adapter *adap, const char *name,
+			    unsigned int idx, unsigned int size_mb)
+{
+	struct dentry *de;
+
+	de = debugfs_create_file(name, S_IRUSR, adap->debugfs_root,
+				 (void *)adap + idx, &mem_debugfs_fops);
+	if (de && de->d_inode)
+		de->d_inode->i_size = size_mb << 20;
+}
+
+/* Add an array of Debug FS files.
+ */
+void add_debugfs_files(struct adapter *adap,
+		       struct t4_debugfs_entry *files,
+		       unsigned int nfiles)
+{
+	int i;
+
+	/* debugfs support is best effort */
+	for (i = 0; i < nfiles; i++)
+		debugfs_create_file(files[i].name, files[i].mode,
+				    adap->debugfs_root,
+				    (void *)adap + files[i].data,
+				    files[i].ops);
+}
+
+int t4_setup_debugfs(struct adapter *adap)
+{
+	int i;
+	u32 size;
+
+	static struct t4_debugfs_entry t4_debugfs_files[] = {
+		{ "l2t", &t4_l2t_fops, S_IRUSR, 0},
+	};
+
+	add_debugfs_files(adap,
+			  t4_debugfs_files,
+			  ARRAY_SIZE(t4_debugfs_files));
+
+	i = t4_read_reg(adap, MA_TARGET_MEM_ENABLE);
+	if (i & EDRAM0_ENABLE) {
+		size = t4_read_reg(adap, MA_EDRAM0_BAR);
+		add_debugfs_mem(adap, "edc0", MEM_EDC0, EDRAM_SIZE_GET(size));
+	}
+	if (i & EDRAM1_ENABLE) {
+		size = t4_read_reg(adap, MA_EDRAM1_BAR);
+		add_debugfs_mem(adap, "edc1", MEM_EDC1, EDRAM_SIZE_GET(size));
+	}
+	if (is_t4(adap->params.chip)) {
+		size = t4_read_reg(adap, MA_EXT_MEMORY_BAR);
+		if (i & EXT_MEM_ENABLE)
+			add_debugfs_mem(adap, "mc", MEM_MC,
+					EXT_MEM_SIZE_GET(size));
+	} else {
+		if (i & EXT_MEM_ENABLE) {
+			size = t4_read_reg(adap, MA_EXT_MEMORY_BAR);
+			add_debugfs_mem(adap, "mc0", MEM_MC0,
+					EXT_MEM_SIZE_GET(size));
+		}
+		if (i & EXT_MEM1_ENABLE) {
+			size = t4_read_reg(adap, MA_EXT_MEMORY1_BAR);
+			add_debugfs_mem(adap, "mc1", MEM_MC1,
+					EXT_MEM_SIZE_GET(size));
+		}
+	}
+	return 0;
+}
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h
new file mode 100644
index 0000000..a3d8867
--- /dev/null
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.h
@@ -0,0 +1,52 @@
+/*
+ * This file is part of the Chelsio T4 Ethernet driver for Linux.
+ *
+ * Copyright (c) 2003-2014 Chelsio Communications, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __CXGB4_DEBUGFS_H
+#define __CXGB4_DEBUGFS_H
+
+#include <linux/export.h>
+
+struct t4_debugfs_entry {
+	const char *name;
+	const struct file_operations *ops;
+	mode_t mode;
+	unsigned char data;
+};
+
+int t4_setup_debugfs(struct adapter *adap);
+void add_debugfs_files(struct adapter *adap,
+		       struct t4_debugfs_entry *files,
+		       unsigned int nfiles);
+
+#endif
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 8520d55..172f68b 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -68,6 +68,7 @@
 #include "t4_msg.h"
 #include "t4fw_api.h"
 #include "cxgb4_dcb.h"
+#include "cxgb4_debugfs.h"
 #include "l2t.h"
 
 #include <../drivers/net/bonding/bonding.h>
@@ -1287,7 +1288,7 @@ void *t4_alloc_mem(size_t size)
 /*
  * Free memory allocated through alloc_mem().
  */
-static void t4_free_mem(void *addr)
+void t4_free_mem(void *addr)
 {
 	if (is_vmalloc_addr(addr))
 		vfree(addr);
@@ -3127,102 +3128,14 @@ static const struct ethtool_ops cxgb_ethtool_ops = {
 	.flash_device      = set_flash,
 };
 
-/*
- * debugfs support
- */
-static ssize_t mem_read(struct file *file, char __user *buf, size_t count,
-			loff_t *ppos)
-{
-	loff_t pos = *ppos;
-	loff_t avail = file_inode(file)->i_size;
-	unsigned int mem = (uintptr_t)file->private_data & 3;
-	struct adapter *adap = file->private_data - mem;
-	__be32 *data;
-	int ret;
-
-	if (pos < 0)
-		return -EINVAL;
-	if (pos >= avail)
-		return 0;
-	if (count > avail - pos)
-		count = avail - pos;
-
-	data = t4_alloc_mem(count);
-	if (!data)
-		return -ENOMEM;
-
-	spin_lock(&adap->win0_lock);
-	ret = t4_memory_rw(adap, 0, mem, pos, count, data, T4_MEMORY_READ);
-	spin_unlock(&adap->win0_lock);
-	if (ret) {
-		t4_free_mem(data);
-		return ret;
-	}
-	ret = copy_to_user(buf, data, count);
-
-	t4_free_mem(data);
-	if (ret)
-		return -EFAULT;
-
-	*ppos = pos + count;
-	return count;
-}
-
-static const struct file_operations mem_debugfs_fops = {
-	.owner   = THIS_MODULE,
-	.open    = simple_open,
-	.read    = mem_read,
-	.llseek  = default_llseek,
-};
-
-static void add_debugfs_mem(struct adapter *adap, const char *name,
-			    unsigned int idx, unsigned int size_mb)
-{
-	struct dentry *de;
-
-	de = debugfs_create_file(name, S_IRUSR, adap->debugfs_root,
-				 (void *)adap + idx, &mem_debugfs_fops);
-	if (de && de->d_inode)
-		de->d_inode->i_size = size_mb << 20;
-}
-
 static int setup_debugfs(struct adapter *adap)
 {
-	int i;
-	u32 size;
-
 	if (IS_ERR_OR_NULL(adap->debugfs_root))
 		return -1;
 
-	i = t4_read_reg(adap, MA_TARGET_MEM_ENABLE);
-	if (i & EDRAM0_ENABLE) {
-		size = t4_read_reg(adap, MA_EDRAM0_BAR);
-		add_debugfs_mem(adap, "edc0", MEM_EDC0,	EDRAM_SIZE_GET(size));
-	}
-	if (i & EDRAM1_ENABLE) {
-		size = t4_read_reg(adap, MA_EDRAM1_BAR);
-		add_debugfs_mem(adap, "edc1", MEM_EDC1, EDRAM_SIZE_GET(size));
-	}
-	if (is_t4(adap->params.chip)) {
-		size = t4_read_reg(adap, MA_EXT_MEMORY_BAR);
-		if (i & EXT_MEM_ENABLE)
-			add_debugfs_mem(adap, "mc", MEM_MC,
-					EXT_MEM_SIZE_GET(size));
-	} else {
-		if (i & EXT_MEM_ENABLE) {
-			size = t4_read_reg(adap, MA_EXT_MEMORY_BAR);
-			add_debugfs_mem(adap, "mc0", MEM_MC0,
-					EXT_MEM_SIZE_GET(size));
-		}
-		if (i & EXT_MEM1_ENABLE) {
-			size = t4_read_reg(adap, MA_EXT_MEMORY1_BAR);
-			add_debugfs_mem(adap, "mc1", MEM_MC1,
-					EXT_MEM_SIZE_GET(size));
-		}
-	}
-	if (adap->l2t)
-		debugfs_create_file("l2t", S_IRUSR, adap->debugfs_root, adap,
-				    &t4_l2t_fops);
+#ifdef CONFIG_DEBUG_FS
+	t4_setup_debugfs(adap);
+#endif
 	return 0;
 }