122 lines · c
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_ef4_mtd_partition(mtd) \17 container_of(mtd, struct ef4_mtd_partition, mtd)18 19/* MTD interface */20 21static int ef4_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)22{23 struct ef4_nic *efx = mtd->priv;24 25 return efx->type->mtd_erase(mtd, erase->addr, erase->len);26}27 28static void ef4_mtd_sync(struct mtd_info *mtd)29{30 struct ef4_mtd_partition *part = to_ef4_mtd_partition(mtd);31 struct ef4_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 ef4_mtd_remove_partition(struct ef4_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 ef4_mtd_add(struct ef4_nic *efx, struct ef4_mtd_partition *parts,55 size_t n_parts, size_t sizeof_part)56{57 struct ef4_mtd_partition *part;58 size_t i;59 60 for (i = 0; i < n_parts; i++) {61 part = (struct ef4_mtd_partition *)((char *)parts +62 i * sizeof_part);63 64 part->mtd.writesize = 1;65 66 part->mtd.owner = THIS_MODULE;67 part->mtd.priv = efx;68 part->mtd.name = part->name;69 part->mtd._erase = ef4_mtd_erase;70 part->mtd._read = efx->type->mtd_read;71 part->mtd._write = efx->type->mtd_write;72 part->mtd._sync = ef4_mtd_sync;73 74 efx->type->mtd_rename(part);75 76 if (mtd_device_register(&part->mtd, NULL, 0))77 goto fail;78 79 /* Add to list in order - ef4_mtd_remove() depends on this */80 list_add_tail(&part->node, &efx->mtd_list);81 }82 83 return 0;84 85fail:86 while (i--) {87 part = (struct ef4_mtd_partition *)((char *)parts +88 i * sizeof_part);89 ef4_mtd_remove_partition(part);90 }91 /* Failure is unlikely here, but probably means we're out of memory */92 return -ENOMEM;93}94 95void ef4_mtd_remove(struct ef4_nic *efx)96{97 struct ef4_mtd_partition *parts, *part, *next;98 99 WARN_ON(ef4_dev_registered(efx));100 101 if (list_empty(&efx->mtd_list))102 return;103 104 parts = list_first_entry(&efx->mtd_list, struct ef4_mtd_partition,105 node);106 107 list_for_each_entry_safe(part, next, &efx->mtd_list, node)108 ef4_mtd_remove_partition(part);109 110 kfree(parts);111}112 113void ef4_mtd_rename(struct ef4_nic *efx)114{115 struct ef4_mtd_partition *part;116 117 ASSERT_RTNL();118 119 list_for_each_entry(part, &efx->mtd_list, node)120 efx->type->mtd_rename(part);121}122