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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | /**************************************************************************** * 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_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; 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; } 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; 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); } |