^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /****************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Driver for Solarflare network controllers and boards
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright 2005-2006 Fen Systems Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2006-2013 Solarflare Communications Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "net_driver.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "efx.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define to_efx_mtd_partition(mtd) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) container_of(mtd, struct efx_mtd_partition, mtd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /* MTD interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct efx_nic *efx = mtd->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) return efx->type->mtd_erase(mtd, erase->addr, erase->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static void efx_mtd_sync(struct mtd_info *mtd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct efx_nic *efx = mtd->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) rc = efx->type->mtd_sync(mtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) pr_err("%s: %s sync failed (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) part->name, part->dev_type_name, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static void efx_mtd_remove_partition(struct efx_mtd_partition *part)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) rc = mtd_device_unregister(&part->mtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (rc != -EBUSY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ssleep(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) WARN_ON(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) list_del(&part->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) size_t n_parts, size_t sizeof_part)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct efx_mtd_partition *part;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) for (i = 0; i < n_parts; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) part = (struct efx_mtd_partition *)((char *)parts +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) i * sizeof_part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) part->mtd.writesize = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!(part->mtd.flags & MTD_NO_ERASE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) part->mtd.flags |= MTD_WRITEABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) part->mtd.owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) part->mtd.priv = efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) part->mtd.name = part->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) part->mtd._erase = efx_mtd_erase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) part->mtd._read = efx->type->mtd_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) part->mtd._write = efx->type->mtd_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) part->mtd._sync = efx_mtd_sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) efx->type->mtd_rename(part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (mtd_device_register(&part->mtd, NULL, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* Add to list in order - efx_mtd_remove() depends on this */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) list_add_tail(&part->node, &efx->mtd_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) while (i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) part = (struct efx_mtd_partition *)((char *)parts +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) i * sizeof_part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) efx_mtd_remove_partition(part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /* Failure is unlikely here, but probably means we're out of memory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) void efx_mtd_remove(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct efx_mtd_partition *parts, *part, *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) WARN_ON(efx_dev_registered(efx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (list_empty(&efx->mtd_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) parts = list_first_entry(&efx->mtd_list, struct efx_mtd_partition,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) list_for_each_entry_safe(part, next, &efx->mtd_list, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) efx_mtd_remove_partition(part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) kfree(parts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) void efx_mtd_rename(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct efx_mtd_partition *part;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) list_for_each_entry(part, &efx->mtd_list, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) efx->type->mtd_rename(part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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