Revision 47330077650a25d417155848516b2cba97999602 authored by Divy Le Ray on 30 August 2007, 02:15:52 UTC, committed by Jeff Garzik on 31 August 2007, 11:29:08 UTC
Load the engine microcode when an interface
is brought up, instead of of doing it when the module
is loaded.
Loosen up tight binding between the driver and the
engine microcode version.
There is no need for microcode update with T3A boards.
Fix the file naming.
Do a better job at logging the loading activity.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
1 parent 5fbf816
Raw File
msgutil.c
/*
 * linux/ipc/msgutil.c
 * Copyright (C) 1999, 2004 Manfred Spraul
 *
 * This file is released under GNU General Public Licence version 2 or
 * (at your option) any later version.
 *
 * See the file COPYING for more details.
 */

#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/security.h>
#include <linux/slab.h>
#include <linux/ipc.h>
#include <asm/uaccess.h>

#include "util.h"

struct msg_msgseg {
	struct msg_msgseg* next;
	/* the next part of the message follows immediately */
};

#define DATALEN_MSG	(PAGE_SIZE-sizeof(struct msg_msg))
#define DATALEN_SEG	(PAGE_SIZE-sizeof(struct msg_msgseg))

struct msg_msg *load_msg(const void __user *src, int len)
{
	struct msg_msg *msg;
	struct msg_msgseg **pseg;
	int err;
	int alen;

	alen = len;
	if (alen > DATALEN_MSG)
		alen = DATALEN_MSG;

	msg = kmalloc(sizeof(*msg) + alen, GFP_KERNEL);
	if (msg == NULL)
		return ERR_PTR(-ENOMEM);

	msg->next = NULL;
	msg->security = NULL;

	if (copy_from_user(msg + 1, src, alen)) {
		err = -EFAULT;
		goto out_err;
	}

	len -= alen;
	src = ((char __user *)src) + alen;
	pseg = &msg->next;
	while (len > 0) {
		struct msg_msgseg *seg;
		alen = len;
		if (alen > DATALEN_SEG)
			alen = DATALEN_SEG;
		seg = kmalloc(sizeof(*seg) + alen,
						 GFP_KERNEL);
		if (seg == NULL) {
			err = -ENOMEM;
			goto out_err;
		}
		*pseg = seg;
		seg->next = NULL;
		if (copy_from_user(seg + 1, src, alen)) {
			err = -EFAULT;
			goto out_err;
		}
		pseg = &seg->next;
		len -= alen;
		src = ((char __user *)src) + alen;
	}

	err = security_msg_msg_alloc(msg);
	if (err)
		goto out_err;

	return msg;

out_err:
	free_msg(msg);
	return ERR_PTR(err);
}

int store_msg(void __user *dest, struct msg_msg *msg, int len)
{
	int alen;
	struct msg_msgseg *seg;

	alen = len;
	if (alen > DATALEN_MSG)
		alen = DATALEN_MSG;
	if (copy_to_user(dest, msg + 1, alen))
		return -1;

	len -= alen;
	dest = ((char __user *)dest) + alen;
	seg = msg->next;
	while (len > 0) {
		alen = len;
		if (alen > DATALEN_SEG)
			alen = DATALEN_SEG;
		if (copy_to_user(dest, seg + 1, alen))
			return -1;
		len -= alen;
		dest = ((char __user *)dest) + alen;
		seg = seg->next;
	}
	return 0;
}

void free_msg(struct msg_msg *msg)
{
	struct msg_msgseg *seg;

	security_msg_msg_free(msg);

	seg = msg->next;
	kfree(msg);
	while (seg != NULL) {
		struct msg_msgseg *tmp = seg->next;
		kfree(seg);
		seg = tmp;
	}
}
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