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1// SPDX-License-Identifier: GPL-2.0-only2/****************************************************************************3 * Driver for Solarflare network controllers and boards4 * Copyright 2005-2006 Fen Systems Ltd.5 * Copyright 2006-2013 Solarflare Communications Inc.6 */7 8#include <linux/module.h>9#include <linux/mtd/mtd.h>10#include <linux/slab.h>11#include <linux/rtnetlink.h>12 13#include "net_driver.h"14#include "efx.h"15 16#define to_efx_mtd_partition(mtd) \17 container_of(mtd, struct efx_mtd_partition, mtd)18 19/* MTD interface */20 21static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)22{23 struct efx_nic *efx = mtd->priv;24 25 return efx->type->mtd_erase(mtd, erase->addr, erase->len);26}27 28static void efx_mtd_sync(struct mtd_info *mtd)29{30 struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);31 struct efx_nic *efx = mtd->priv;32 int rc;33 34 rc = efx->type->mtd_sync(mtd);35 if (rc)36 pr_err("%s: %s sync failed (%d)\n",37 part->name, part->dev_type_name, rc);38}39 40static void efx_mtd_remove_partition(struct efx_mtd_partition *part)41{42 int rc;43 44 for (;;) {45 rc = mtd_device_unregister(&part->mtd);46 if (rc != -EBUSY)47 break;48 ssleep(1);49 }50 WARN_ON(rc);51 list_del(&part->node);52}53 54int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,55 size_t n_parts, size_t sizeof_part)56{57 struct efx_mtd_partition *part;58 size_t i;59 60 for (i = 0; i < n_parts; i++) {61 part = (struct efx_mtd_partition *)((char *)parts +62 i * sizeof_part);63 64 part->mtd.writesize = 1;65 66 if (!(part->mtd.flags & MTD_NO_ERASE))67 part->mtd.flags |= MTD_WRITEABLE;68 69 part->mtd.owner = THIS_MODULE;70 part->mtd.priv = efx;71 part->mtd.name = part->name;72 part->mtd._erase = efx_mtd_erase;73 part->mtd._read = efx->type->mtd_read;74 part->mtd._write = efx->type->mtd_write;75 part->mtd._sync = efx_mtd_sync;76 77 efx->type->mtd_rename(part);78 79 if (mtd_device_register(&part->mtd, NULL, 0))80 goto fail;81 82 /* Add to list in order - efx_mtd_remove() depends on this */83 list_add_tail(&part->node, &efx->mtd_list);84 }85 86 return 0;87 88fail:89 while (i--) {90 part = (struct efx_mtd_partition *)((char *)parts +91 i * sizeof_part);92 efx_mtd_remove_partition(part);93 }94 /* Failure is unlikely here, but probably means we're out of memory */95 return -ENOMEM;96}97 98void efx_mtd_remove(struct efx_nic *efx)99{100 struct efx_mtd_partition *parts, *part, *next;101 102 WARN_ON(efx_dev_registered(efx));103 104 if (list_empty(&efx->mtd_list))105 return;106 107 parts = list_first_entry(&efx->mtd_list, struct efx_mtd_partition,108 node);109 110 list_for_each_entry_safe(part, next, &efx->mtd_list, node)111 efx_mtd_remove_partition(part);112 113 kfree(parts);114}115 116void efx_mtd_rename(struct efx_nic *efx)117{118 struct efx_mtd_partition *part;119 120 ASSERT_RTNL();121 122 list_for_each_entry(part, &efx->mtd_list, node)123 efx->type->mtd_rename(part);124}125