[linux-2.6-block.git] / drivers / net / ethernet / sfc / mtd.c

/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2005-2006 Fen Systems Ltd.
 * Copyright 2006-2013 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */

#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/slab.h>
#include <linux/rtnetlink.h>

#include "net_driver.h"
#include "efx.h"

#define to_efx_mtd_partition(mtd)				\
	container_of(mtd, struct efx_mtd_partition, mtd)

/* MTD interface */

static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
{
	struct efx_nic *efx = mtd->priv;
	int rc;

	rc = efx->type->mtd_erase(mtd, erase->addr, erase->len);
	if (rc == 0) {
		erase->state = MTD_ERASE_DONE;
	} else {
		erase->state = MTD_ERASE_FAILED;
		erase->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
	}
	mtd_erase_callback(erase);
	return rc;
}

static void efx_mtd_sync(struct mtd_info *mtd)
{
	struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
	struct efx_nic *efx = mtd->priv;
	int rc;

	rc = efx->type->mtd_sync(mtd);
	if (rc)
		pr_err("%s: %s sync failed (%d)\n",
		       part->name, part->dev_type_name, rc);
}

static void efx_mtd_remove_partition(struct efx_mtd_partition *part)
{
	int rc;

	for (;;) {
		rc = mtd_device_unregister(&part->mtd);
		if (rc != -EBUSY)
			break;
		ssleep(1);
	}
	WARN_ON(rc);
	list_del(&part->node);
}

int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
		size_t n_parts, size_t sizeof_part)
{
	struct efx_mtd_partition *part;
	size_t i;

	for (i = 0; i < n_parts; i++) {
		part = (struct efx_mtd_partition *)((char *)parts +
						    i * sizeof_part);

		part->mtd.writesize = 1;

		part->mtd.owner = THIS_MODULE;
		part->mtd.priv = efx;
		part->mtd.name = part->name;
		part->mtd._erase = efx_mtd_erase;
		part->mtd._read = efx->type->mtd_read;
		part->mtd._write = efx->type->mtd_write;
		part->mtd._sync = efx_mtd_sync;

		efx->type->mtd_rename(part);

		if (mtd_device_register(&part->mtd, NULL, 0))
			goto fail;

		/* Add to list in order - efx_mtd_remove() depends on this */
		list_add_tail(&part->node, &efx->mtd_list);
	}

	return 0;

fail:
	while (i--) {
		part = (struct efx_mtd_partition *)((char *)parts +
						    i * sizeof_part);
		efx_mtd_remove_partition(part);
	}
	/* Failure is unlikely here, but probably means we're out of memory */
	return -ENOMEM;
}

void efx_mtd_remove(struct efx_nic *efx)
{
	struct efx_mtd_partition *parts, *part, *next;

	WARN_ON(efx_dev_registered(efx));

	if (list_empty(&efx->mtd_list))
		return;

	parts = list_first_entry(&efx->mtd_list, struct efx_mtd_partition,
				 node);

	list_for_each_entry_safe(part, next, &efx->mtd_list, node)
		efx_mtd_remove_partition(part);

	kfree(parts);
}

void efx_mtd_rename(struct efx_nic *efx)
{
	struct efx_mtd_partition *part;

	ASSERT_RTNL();

	list_for_each_entry(part, &efx->mtd_list, node)
		efx->type->mtd_rename(part);
}
Commit	Line	Data
f4150724	1	/****************************************************************************
f7a6d2c4	2	* Driver for Solarflare network controllers and boards
f4150724	3	* Copyright 2005-2006 Fen Systems Ltd.
f7a6d2c4	4	* Copyright 2006-2013 Solarflare Communications Inc.
f4150724 BH	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License version 2 as published
	8	* by the Free Software Foundation, incorporated herein by reference.
	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/mtd/mtd.h>
5a0e3ad6	13	#include <linux/slab.h>
76884835	14	#include <linux/rtnetlink.h>
f4150724	15
f4150724	16	#include "net_driver.h"
ff2ef902	17	#include "efx.h"
76884835	18
76884835 BH	19	#define to_efx_mtd_partition(mtd) \
	20	container_of(mtd, struct efx_mtd_partition, mtd)
	21
f4150724 BH	22	/* MTD interface */
f4150724 BH	23
76884835 BH	24	static int efx_mtd_erase(struct mtd_info mtd, struct erase_info erase)
76884835 BH	25	{
b766630b	26	struct efx_nic *efx = mtd->priv;
76884835 BH	27	int rc;
76884835 BH	28
45a3fd55	29	rc = efx->type->mtd_erase(mtd, erase->addr, erase->len);
76884835 BH	30	if (rc == 0) {
	31	erase->state = MTD_ERASE_DONE;
	32	} else {
	33	erase->state = MTD_ERASE_FAILED;
88dfda5f	34	erase->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
76884835 BH	35	}
	36	mtd_erase_callback(erase);
	37	return rc;
	38	}
	39
	40	static void efx_mtd_sync(struct mtd_info *mtd)
	41	{
0c605a20	42	struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
b766630b	43	struct efx_nic *efx = mtd->priv;
76884835 BH	44	int rc;
76884835 BH	45
45a3fd55	46	rc = efx->type->mtd_sync(mtd);
76884835	47	if (rc)
0c605a20	48	pr_err("%s: %s sync failed (%d)\n",
b766630b	49	part->name, part->dev_type_name, rc);
76884835 BH	50	}
	51
	52	static void efx_mtd_remove_partition(struct efx_mtd_partition *part)
	53	{
	54	int rc;
	55
	56	for (;;) {
ee0e87b1	57	rc = mtd_device_unregister(&part->mtd);
76884835 BH	58	if (rc != -EBUSY)
	59	break;
	60	ssleep(1);
	61	}
	62	WARN_ON(rc);
b766630b	63	list_del(&part->node);
76884835 BH	64	}
76884835 BH	65
45a3fd55 BH	66	int efx_mtd_add(struct efx_nic efx, struct efx_mtd_partition parts,
45a3fd55 BH	67	size_t n_parts, size_t sizeof_part)
76884835 BH	68	{
76884835 BH	69	struct efx_mtd_partition *part;
b766630b	70	size_t i;
76884835	71
b766630b	72	for (i = 0; i < n_parts; i++) {
141d748e BH	73	part = (struct efx_mtd_partition )((char )parts +
141d748e BH	74	i * sizeof_part);
76884835	75
76884835 BH	76	part->mtd.writesize = 1;
	77
	78	part->mtd.owner = THIS_MODULE;
b766630b	79	part->mtd.priv = efx;
76884835	80	part->mtd.name = part->name;
3c3c10bb	81	part->mtd._erase = efx_mtd_erase;
45a3fd55 BH	82	part->mtd._read = efx->type->mtd_read;
45a3fd55 BH	83	part->mtd._write = efx->type->mtd_write;
3c3c10bb	84	part->mtd._sync = efx_mtd_sync;
76884835	85
45a3fd55	86	efx->type->mtd_rename(part);
b766630b	87
ee0e87b1	88	if (mtd_device_register(&part->mtd, NULL, 0))
76884835	89	goto fail;
b766630b BH	90
	91	/* Add to list in order - efx_mtd_remove() depends on this */
	92	list_add_tail(&part->node, &efx->mtd_list);
76884835 BH	93	}
76884835 BH	94
76884835 BH	95	return 0;
	96
	97	fail:
141d748e BH	98	while (i--) {
	99	part = (struct efx_mtd_partition )((char )parts +
	100	i * sizeof_part);
	101	efx_mtd_remove_partition(part);
	102	}
7c43161c	103	/* Failure is unlikely here, but probably means we're out of memory */
76884835 BH	104	return -ENOMEM;
	105	}
	106
	107	void efx_mtd_remove(struct efx_nic *efx)
f4150724	108	{
b766630b	109	struct efx_mtd_partition parts, part, *next;
76884835 BH	110
	111	WARN_ON(efx_dev_registered(efx));
	112
b766630b BH	113	if (list_empty(&efx->mtd_list))
	114	return;
	115
	116	parts = list_first_entry(&efx->mtd_list, struct efx_mtd_partition,
	117	node);
	118
	119	list_for_each_entry_safe(part, next, &efx->mtd_list, node)
	120	efx_mtd_remove_partition(part);
	121
	122	kfree(parts);
76884835 BH	123	}
	124
	125	void efx_mtd_rename(struct efx_nic *efx)
	126	{
b766630b	127	struct efx_mtd_partition *part;
76884835 BH	128
	129	ASSERT_RTNL();
	130
b766630b	131	list_for_each_entry(part, &efx->mtd_list, node)
45a3fd55	132	efx->type->mtd_rename(part);
8880f4ec	133	}