// SPDX-License-Identifier: GPL-2.0-only
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/****************************************************************************
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* Driver for Solarflare network controllers and boards
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* Copyright 2005-2006 Fen Systems Ltd.
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* Copyright 2006-2013 Solarflare Communications Inc.
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*/
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#include <linux/module.h>
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#include <linux/mtd/mtd.h>
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#include <linux/slab.h>
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#include <linux/rtnetlink.h>
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#include "net_driver.h"
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#include "efx.h"
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#define to_efx_mtd_partition(mtd) \
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container_of(mtd, struct efx_mtd_partition, mtd)
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/* MTD interface */
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static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
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{
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struct efx_nic *efx = mtd->priv;
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return efx->type->mtd_erase(mtd, erase->addr, erase->len);
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}
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static void efx_mtd_sync(struct mtd_info *mtd)
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{
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struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
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struct efx_nic *efx = mtd->priv;
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int rc;
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rc = efx->type->mtd_sync(mtd);
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if (rc)
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pr_err("%s: %s sync failed (%d)\n",
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part->name, part->dev_type_name, rc);
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}
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static void efx_mtd_remove_partition(struct efx_mtd_partition *part)
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{
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int rc;
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for (;;) {
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rc = mtd_device_unregister(&part->mtd);
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if (rc != -EBUSY)
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break;
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ssleep(1);
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}
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WARN_ON(rc);
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list_del(&part->node);
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}
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int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
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size_t n_parts, size_t sizeof_part)
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{
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struct efx_mtd_partition *part;
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size_t i;
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for (i = 0; i < n_parts; i++) {
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part = (struct efx_mtd_partition *)((char *)parts +
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i * sizeof_part);
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part->mtd.writesize = 1;
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if (!(part->mtd.flags & MTD_NO_ERASE))
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part->mtd.flags |= MTD_WRITEABLE;
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part->mtd.owner = THIS_MODULE;
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part->mtd.priv = efx;
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part->mtd.name = part->name;
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part->mtd._erase = efx_mtd_erase;
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part->mtd._read = efx->type->mtd_read;
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part->mtd._write = efx->type->mtd_write;
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part->mtd._sync = efx_mtd_sync;
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efx->type->mtd_rename(part);
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if (mtd_device_register(&part->mtd, NULL, 0))
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goto fail;
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/* Add to list in order - efx_mtd_remove() depends on this */
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list_add_tail(&part->node, &efx->mtd_list);
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}
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return 0;
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fail:
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while (i--) {
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part = (struct efx_mtd_partition *)((char *)parts +
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i * sizeof_part);
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efx_mtd_remove_partition(part);
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}
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/* Failure is unlikely here, but probably means we're out of memory */
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return -ENOMEM;
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}
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void efx_mtd_remove(struct efx_nic *efx)
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{
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struct efx_mtd_partition *parts, *part, *next;
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WARN_ON(efx_dev_registered(efx));
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if (list_empty(&efx->mtd_list))
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return;
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parts = list_first_entry(&efx->mtd_list, struct efx_mtd_partition,
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node);
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list_for_each_entry_safe(part, next, &efx->mtd_list, node)
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efx_mtd_remove_partition(part);
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kfree(parts);
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}
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void efx_mtd_rename(struct efx_nic *efx)
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{
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struct efx_mtd_partition *part;
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ASSERT_RTNL();
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list_for_each_entry(part, &efx->mtd_list, node)
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efx->type->mtd_rename(part);
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}
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