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Release 4.11 drivers/net/ethernet/sfc/falcon/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_ef4_mtd_partition(mtd)				\
	container_of(mtd, struct ef4_mtd_partition, mtd)

/* MTD interface */


static int ef4_mtd_erase(struct mtd_info *mtd, struct erase_info *erase) { struct ef4_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 ef4_mtd_sync(struct mtd_info *mtd) { struct ef4_mtd_partition *part = to_ef4_mtd_partition(mtd); struct ef4_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 ef4_mtd_remove_partition(struct ef4_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 ef4_mtd_add(struct ef4_nic *efx, struct ef4_mtd_partition *parts, size_t n_parts, size_t sizeof_part) { struct ef4_mtd_partition *part; size_t i; for (i = 0; i < n_parts; i++) { part = (struct ef4_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 = ef4_mtd_erase; part->mtd._read = efx->type->mtd_read; part->mtd._write = efx->type->mtd_write; part->mtd._sync = ef4_mtd_sync; efx->type->mtd_rename(part); if (mtd_device_register(&part->mtd, NULL, 0)) goto fail; /* Add to list in order - ef4_mtd_remove() depends on this */ list_add_tail(&part->node, &efx->mtd_list); } return 0; fail: while (i--) { part = (struct ef4_mtd_partition *)((char *)parts + i * sizeof_part); ef4_mtd_remove_partition(part); } /* Failure is unlikely here, but probably means we're out of memory */ return -ENOMEM; }

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void ef4_mtd_remove(struct ef4_nic *efx) { struct ef4_mtd_partition *parts, *part, *next; WARN_ON(ef4_dev_registered(efx)); if (list_empty(&efx->mtd_list)) return; parts = list_first_entry(&efx->mtd_list, struct ef4_mtd_partition, node); list_for_each_entry_safe(part, next, &efx->mtd_list, node) ef4_mtd_remove_partition(part); kfree(parts); }

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void ef4_mtd_rename(struct ef4_nic *efx) { struct ef4_mtd_partition *part; ASSERT_RTNL(); list_for_each_entry(part, &efx->mtd_list, node) efx->type->mtd_rename(part); }

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