change function headers, add basic load handle

git-svn-id: svn+ssh://en.codiert.org/home/staff/ben/dev/misc.svn/projects/fpgafs@357 766a2236-cff9-0310-b0c0-a81a5f92509a

files.c

@@ -42,7 +42,6 @@ static ssize_t fpgafs_stat_read(struct file *file, char __user *buf,
 	if (copy_to_user(buf, &data, sizeof(data)))
 		return -EFAULT;
 
-	fpgafs_recv_data(NULL, 1);
 	return 4;
 }
 
@@ -67,7 +66,6 @@ static ssize_t fpgafs_cmd_write(struct file *file, const char __user *buf,
 		return -EFAULT;
 
 	do_cmd(BLA,data);
-	fpgafs_send_data(NULL, 1);
 	return 4;
 }
 

fpgafs.h

@@ -50,8 +50,10 @@ struct fpgafs_lldrv {
 int fpgafs_register_lldrv(struct fpgafs_lldrv *drv);
 int fpgafs_unregister_lldrv(struct fpgafs_lldrv *drv);
 
-int fpgafs_send_data(char *buf, int len);
-int fpgafs_recv_data(char *buf, int len);
+static ssize_t fpgafs_send_data(struct file *file, char __user *buf,
+                                size_t len, loff_t *pos);
+static ssize_t fpgafs_recv_data(struct file *file, char __user *buf,
+                                size_t len, loff_t *pos);
 
 int fpgafs_read_load(char *buf, int len);
 int fpgafs_write_load(char *buf, int len);

fpgafs_lldrv_dbg.c

@@ -4,8 +4,13 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/pagemap.h>
+#include <linux/mm.h>
 #include "fpgafs.h"
 
+static int load = 0;
+static unsigned char *load_buf;
+
 static int fpgafs_send_data_dbg(unsigned char *buf, int len)
 {
 	printk("fpgafs: send data DEBUG\n");
@@ -20,12 +25,42 @@ static int fpgafs_recv_data_dbg(unsigned char *buf, int len)
 
 static int fpgafs_read_load_dbg(unsigned char *buf, int len)
 {
-	return 0;
+	if (load == 0)
+		return -EBUSY;
+
+	len = len > sizeof(load_buf)?sizeof(load_buf):len;
+
+	if (copy_to_user(buf, load_buf, len))
+		return -EFAULT;
+
+	return len;
 }
 
 static int fpgafs_write_load_dbg(unsigned char *buf, int len)
 {
-	return 0;
+	u32 cp = 0;
+	u8 __user *usr;
+
+	if (load == 1)
+		return -EBUSY;
+
+	if (len < 2)
+		return -EINVAL;
+
+	if (!access_ok(VERIFY_READ, buf, len))
+		return -EFAULT;
+
+	load_buf = kmalloc(len,GFP_USER);
+
+	while (cp < len) {
+		usr = (u8*)&buf[cp];
+		if (__get_user(load_buf[cp], usr))
+			return -EFAULT;
+		cp++;
+	}
+
+	load = 1;
+	return len;
 }
 
 static struct fpgafs_lldrv fpgafs_lldrv_dbg = {
@@ -46,6 +81,8 @@ int __init fpgafs_lldrv_dbg_init(void)
 
 void __exit fpgafs_lldrv_dbg_exit(void)
 {
+	load = 0;
+	kfree(load_buf);
 	fpgafs_unregister_lldrv(&fpgafs_lldrv_dbg);
 }
 

llmgmt.c

@@ -13,13 +13,15 @@ static struct fpgafs_lldrv *lldrv_cur;
 static int lldrv_count = 0x0;
 static DEFINE_SPINLOCK(fpgafs_lldrv_lock);
 
-int fpgafs_send_data(char *buf, int len)
+ssize_t fpgafs_send_data(struct file *file, char __user *buf,
+                                size_t len, loff_t *pos)
 {
 	return (lldrv_cur) ? lldrv_cur->send(buf, len) : -EBUSY;
 }
 EXPORT_SYMBOL_GPL(fpgafs_send_data);
 
-int fpgafs_recv_data(char *buf, int len)
+ssize_t fpgafs_recv_data(struct file *file, char __user *buf,
+                                size_t len, loff_t *pos)
 {
 	return (lldrv_cur) ? lldrv_cur->recv(buf, len) : -EBUSY;
 }