Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / net / ethernet / sfc / mtd.c

diff --git a/kernel/drivers/net/ethernet/sfc/mtd.c b/kernel/drivers/net/ethernet/sfc/mtd.c
new file mode 100644 (file)
index 0000000..a77a8bd
--- /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);
+}