Release 4.7 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;
}
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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);
}
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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);
}
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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;
}
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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);
}
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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);
}
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