1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /****************************************************************************
3*4882a593Smuzhiyun * Driver for Solarflare network controllers and boards
4*4882a593Smuzhiyun * Copyright 2005-2006 Fen Systems Ltd.
5*4882a593Smuzhiyun * Copyright 2006-2013 Solarflare Communications Inc.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/module.h>
9*4882a593Smuzhiyun #include <linux/mtd/mtd.h>
10*4882a593Smuzhiyun #include <linux/slab.h>
11*4882a593Smuzhiyun #include <linux/rtnetlink.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include "net_driver.h"
14*4882a593Smuzhiyun #include "efx.h"
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #define to_ef4_mtd_partition(mtd) \
17*4882a593Smuzhiyun container_of(mtd, struct ef4_mtd_partition, mtd)
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /* MTD interface */
20*4882a593Smuzhiyun
ef4_mtd_erase(struct mtd_info * mtd,struct erase_info * erase)21*4882a593Smuzhiyun static int ef4_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun struct ef4_nic *efx = mtd->priv;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun return efx->type->mtd_erase(mtd, erase->addr, erase->len);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
ef4_mtd_sync(struct mtd_info * mtd)28*4882a593Smuzhiyun static void ef4_mtd_sync(struct mtd_info *mtd)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun struct ef4_mtd_partition *part = to_ef4_mtd_partition(mtd);
31*4882a593Smuzhiyun struct ef4_nic *efx = mtd->priv;
32*4882a593Smuzhiyun int rc;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun rc = efx->type->mtd_sync(mtd);
35*4882a593Smuzhiyun if (rc)
36*4882a593Smuzhiyun pr_err("%s: %s sync failed (%d)\n",
37*4882a593Smuzhiyun part->name, part->dev_type_name, rc);
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
ef4_mtd_remove_partition(struct ef4_mtd_partition * part)40*4882a593Smuzhiyun static void ef4_mtd_remove_partition(struct ef4_mtd_partition *part)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun int rc;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun for (;;) {
45*4882a593Smuzhiyun rc = mtd_device_unregister(&part->mtd);
46*4882a593Smuzhiyun if (rc != -EBUSY)
47*4882a593Smuzhiyun break;
48*4882a593Smuzhiyun ssleep(1);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun WARN_ON(rc);
51*4882a593Smuzhiyun list_del(&part->node);
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
ef4_mtd_add(struct ef4_nic * efx,struct ef4_mtd_partition * parts,size_t n_parts,size_t sizeof_part)54*4882a593Smuzhiyun int ef4_mtd_add(struct ef4_nic *efx, struct ef4_mtd_partition *parts,
55*4882a593Smuzhiyun size_t n_parts, size_t sizeof_part)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun struct ef4_mtd_partition *part;
58*4882a593Smuzhiyun size_t i;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun for (i = 0; i < n_parts; i++) {
61*4882a593Smuzhiyun part = (struct ef4_mtd_partition *)((char *)parts +
62*4882a593Smuzhiyun i * sizeof_part);
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun part->mtd.writesize = 1;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun part->mtd.owner = THIS_MODULE;
67*4882a593Smuzhiyun part->mtd.priv = efx;
68*4882a593Smuzhiyun part->mtd.name = part->name;
69*4882a593Smuzhiyun part->mtd._erase = ef4_mtd_erase;
70*4882a593Smuzhiyun part->mtd._read = efx->type->mtd_read;
71*4882a593Smuzhiyun part->mtd._write = efx->type->mtd_write;
72*4882a593Smuzhiyun part->mtd._sync = ef4_mtd_sync;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun efx->type->mtd_rename(part);
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun if (mtd_device_register(&part->mtd, NULL, 0))
77*4882a593Smuzhiyun goto fail;
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun /* Add to list in order - ef4_mtd_remove() depends on this */
80*4882a593Smuzhiyun list_add_tail(&part->node, &efx->mtd_list);
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun return 0;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun fail:
86*4882a593Smuzhiyun while (i--) {
87*4882a593Smuzhiyun part = (struct ef4_mtd_partition *)((char *)parts +
88*4882a593Smuzhiyun i * sizeof_part);
89*4882a593Smuzhiyun ef4_mtd_remove_partition(part);
90*4882a593Smuzhiyun }
91*4882a593Smuzhiyun /* Failure is unlikely here, but probably means we're out of memory */
92*4882a593Smuzhiyun return -ENOMEM;
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun
ef4_mtd_remove(struct ef4_nic * efx)95*4882a593Smuzhiyun void ef4_mtd_remove(struct ef4_nic *efx)
96*4882a593Smuzhiyun {
97*4882a593Smuzhiyun struct ef4_mtd_partition *parts, *part, *next;
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun WARN_ON(ef4_dev_registered(efx));
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun if (list_empty(&efx->mtd_list))
102*4882a593Smuzhiyun return;
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun parts = list_first_entry(&efx->mtd_list, struct ef4_mtd_partition,
105*4882a593Smuzhiyun node);
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun list_for_each_entry_safe(part, next, &efx->mtd_list, node)
108*4882a593Smuzhiyun ef4_mtd_remove_partition(part);
109*4882a593Smuzhiyun
110*4882a593Smuzhiyun kfree(parts);
111*4882a593Smuzhiyun }
112*4882a593Smuzhiyun
ef4_mtd_rename(struct ef4_nic * efx)113*4882a593Smuzhiyun void ef4_mtd_rename(struct ef4_nic *efx)
114*4882a593Smuzhiyun {
115*4882a593Smuzhiyun struct ef4_mtd_partition *part;
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun ASSERT_RTNL();
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun list_for_each_entry(part, &efx->mtd_list, node)
120*4882a593Smuzhiyun efx->type->mtd_rename(part);
121*4882a593Smuzhiyun }
122