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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | // SPDX-License-Identifier: GPL-2.0-only /**************************************************************************** * Driver for Solarflare network controllers and boards * Copyright 2005-2006 Fen Systems Ltd. * Copyright 2006-2013 Solarflare Communications Inc. */ #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; return efx->type->mtd_erase(mtd, erase->addr, erase->len); } 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); } 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); } 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; if (!(part->mtd.flags & MTD_NO_ERASE)) part->mtd.flags |= MTD_WRITEABLE; 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; } 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); } 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); } |