diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/net/ethernet/sfc/mtd.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/net/ethernet/sfc/mtd.c')
-rw-r--r-- | kernel/drivers/net/ethernet/sfc/mtd.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/kernel/drivers/net/ethernet/sfc/mtd.c b/kernel/drivers/net/ethernet/sfc/mtd.c new file mode 100644 index 000000000..a77a8bd2d --- /dev/null +++ b/kernel/drivers/net/ethernet/sfc/mtd.c @@ -0,0 +1,133 @@ +/**************************************************************************** + * 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); +} |