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add context for each directory 

git-svn-id: svn+ssh://en.codiert.org/home/staff/ben/dev/misc.svn/projects/fpgafs@361 766a2236-cff9-0310-b0c0-a81a5f92509a
This commit is contained in:
ben 2007-07-10 15:07:35 +00:00
parent 5477409477
commit f5d0dc0306
6 changed files with 64 additions and 37 deletions
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7
files.c
View File

@ -26,11 +26,10 @@ static int do_cmd(u32 cmd, u32 data)
/* generic open function for all pipe-like files */
static int fpgafs_open(struct inode *inode, struct file *file)
{
//struct fpgafs_inode_info *i = FPGAFS_I(inode);
//file->private_data = i->i_ctx;
struct fpgafs_inode_info *i = FPGAFS_I(inode);
file->private_data = i->i_ctx;
//return nonseekable_open(inode, file);
return 0;
return nonseekable_open(inode, file);
}
static ssize_t fpgafs_stat_read(struct file *file, char __user *buf,

14
fpgafs.h
View File

@ -15,8 +15,8 @@ enum {
};
struct fpga_context {
int bla1;
int bla2;
char *load_buf;
int bla;
};
struct fpgafs_inode_info {
@ -40,11 +40,11 @@ struct fpgafs_lldrv {
int (*init) (void);
int (*exit) (void);
int (*send) (const char __user *buf, int len);
int (*recv) (unsigned char *buf, int len);
int (*send) (struct fpga_context *ctx, const char __user *buf, int len);
int (*recv) (struct fpga_context *ctx, unsigned char *buf, int len);
int (*read_load) (unsigned char *buf, int len);
int (*write_load) (const char __user *buf, int len);
int (*read_load) (struct fpga_context *ctx, unsigned char *buf, int len);
int (*write_load) (struct fpga_context *ctx, const char __user *buf, int len);
};
int fpgafs_register_lldrv(struct fpgafs_lldrv *drv);
@ -60,4 +60,6 @@ ssize_t fpgafs_write_load(struct file *file, const char __user *buf,
ssize_t fpgafs_read_load(struct file *file, char __user *buf,
size_t len, loff_t *pos);
struct fpga_context* alloc_fpga_context(void);
void free_fpga_context(struct fpga_context *ctx);
#endif /* FPGAFS_H */

4
fpgafs_lldrv_cham.c
View File

@ -6,13 +6,13 @@
#include <linux/init.h>
#include "fpgafs.h"
static int fpgafs_send_data_cham(const char __user *buf, int len)
static int fpgafs_send_data_cham(struct fpga_context *ctx, const char __user *buf, int len)
{
printk("fpgafs: send data CHAM\n");
return 0;
}
static int fpgafs_recv_data_cham(unsigned char *buf, int len)
static int fpgafs_recv_data_cham(struct fpga_context *ctx, unsigned char *buf, int len)
{
printk("fpgafs: receive data CHAM\n");
return 4;

26
fpgafs_lldrv_dbg.c
View File

@ -8,40 +8,37 @@
#include <linux/mm.h>
#include "fpgafs.h"
static int load = 0;
static unsigned char *load_buf;
static int fpgafs_send_data_dbg(const char __user *buf, int len)
static int fpgafs_send_data_dbg(struct fpga_context *ctx, const char __user *buf, int len)
{
printk("fpgafs: send data DEBUG\n");
return 0;
}
static int fpgafs_recv_data_dbg(unsigned char *buf, int len)
static int fpgafs_recv_data_dbg(struct fpga_context *ctx, unsigned char *buf, int len)
{
printk("fpgafs: receive data DEBUG\n");
return 4;
}
static int fpgafs_read_load_dbg(unsigned char *buf, int len)
static int fpgafs_read_load_dbg(struct fpga_context *ctx, unsigned char *buf, int len)
{
if (load == 0)
if (ctx->load_buf == NULL)
return -EBUSY;
len = len > sizeof(load_buf)?sizeof(load_buf):len;
len = len > sizeof(ctx->load_buf)?sizeof(ctx->load_buf):len;
if (copy_to_user(buf, load_buf, len))
if (copy_to_user(buf, ctx->load_buf, len))
return -EFAULT;
return len;
}
static int fpgafs_write_load_dbg(const char __user *buf, int len)
static int fpgafs_write_load_dbg(struct fpga_context *ctx, const char __user *buf, int len)
{
u32 cp = 0;
u8 __user *usr;
if (load == 1)
if (ctx->load_buf != NULL)
return -EBUSY;
if (len < 2)
@ -50,16 +47,15 @@ static int fpgafs_write_load_dbg(const char __user *buf, int len)
if (!access_ok(VERIFY_READ, buf, len))
return -EFAULT;
load_buf = kmalloc(len,GFP_USER);
ctx->load_buf = kmalloc(len,GFP_USER);
while (cp < len) {
usr = (u8*)&buf[cp];
if (__get_user(load_buf[cp], usr))
if (__get_user(ctx->load_buf[cp], usr))
return -EFAULT;
cp++;
}
load = 1;
return len;
}
@ -81,8 +77,6 @@ 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);
}

12
inode.c
View File

@ -166,10 +166,11 @@ int fpgafs_mkdir( struct inode *dir, struct dentry *dentry, int mode)
inode->i_gid = dir->i_gid;
inode->i_mode &= S_ISGID;
}
// ctx = alloc fpga context ....
// FPGAFS_I(inode)->i_ctx = ctx;
//if (!ctx)
// goto unmutex;
ctx = alloc_fpga_context();
FPGAFS_I(inode)->i_ctx = ctx;
if (!ctx)
goto unmutex;
inode->i_op = &fpgafs_simple_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
@ -186,7 +187,7 @@ int fpgafs_mkdir( struct inode *dir, struct dentry *dentry, int mode)
dir->i_nlink++;
dentry->d_inode->i_nlink++;
//unmutex:
unmutex:
mutex_unlock(&inode->i_mutex);
return ret;
}
@ -217,6 +218,7 @@ static void fpgafs_prune_dir(struct dentry *dir)
static int fpgafs_rmdir(struct inode *dir, struct dentry *dentry)
{
/* remove all entries */
free_fpga_context(FPGAFS_I(dentry->d_inode)->i_ctx);
fpgafs_prune_dir(dentry);
//fpgafs_remove_inode

38
llmgmt.c
View File

@ -13,31 +13,61 @@ static struct fpgafs_lldrv *lldrv_cur;
static int lldrv_count = 0x0;
static DEFINE_SPINLOCK(fpgafs_lldrv_lock);
struct fpga_context* alloc_fpga_context(void)
{
struct fpga_context *ctx;
ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
if (!ctx)
goto out;
/* do some stuff */
out:
return ctx;
}
void free_fpga_context(struct fpga_context *ctx)
{
if (ctx->load_buf)
kfree(ctx->load_buf);
kfree(ctx);
return;
}
ssize_t fpgafs_send_data(struct file *file, const char __user *buf,
size_t len, loff_t *pos)
{
return (lldrv_cur) ? lldrv_cur->send(buf, len) : -EBUSY;
return (lldrv_cur) ?
lldrv_cur->send((struct fpga_context*)file->private_data, buf, len)
: -EBUSY;
}
EXPORT_SYMBOL_GPL(fpgafs_send_data);
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;
return (lldrv_cur) ?
lldrv_cur->recv((struct fpga_context*)file->private_data, buf, len)
: -EBUSY;
}
EXPORT_SYMBOL_GPL(fpgafs_recv_data);
ssize_t fpgafs_write_load(struct file *file, const char __user *buf,
size_t len, loff_t *pos)
{
return (lldrv_cur) ? lldrv_cur->write_load(buf, len) : -EBUSY;
return (lldrv_cur) ?
lldrv_cur->write_load((struct fpga_context*)file->private_data, buf, len)
: -EBUSY;
}
EXPORT_SYMBOL_GPL(fpgafs_write_load);
ssize_t fpgafs_read_load(struct file *file, char __user *buf,
size_t len, loff_t *pos)
{
return (lldrv_cur) ? lldrv_cur->read_load(buf, len) : -EBUSY;
return (lldrv_cur) ?
lldrv_cur->read_load((struct fpga_context*)file->private_data, buf, len)
: -EBUSY;
}
EXPORT_SYMBOL_GPL(fpgafs_read_load);