From 2f720f195792bb29289827ef9512e0366a81933b Mon Sep 17 00:00:00 2001
From: Stefan Roese <sr@denx.de>
Date: Thu, 23 Mar 2017 17:01:59 +0100
Subject: [PATCH] net: mvpp2: Add remove function that is called before the OS
is started
This patch adds a remove function to the mvpp2 ethernet driver which is
called before the OS is started, doing:
- Allocate the used buffers back from the buffer manager
- Stop the BM activity
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Stefan Chulski <stefanc@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Nadav Haklai <nadavh@marvell.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
---
drivers/net/mvpp2.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/net/mvpp2.c b/drivers/net/mvpp2.c
index 8ffe6c84d4..08adb68aa5 100644
--- a/drivers/net/mvpp2.c
+++ b/drivers/net/mvpp2.c
@@ -2618,6 +2618,13 @@ static void mvpp2_bm_pool_bufsize_set(struct mvpp2 *priv,
static void mvpp2_bm_bufs_free(struct udevice *dev, struct mvpp2 *priv,
struct mvpp2_bm_pool *bm_pool)
{
+ int i;
+
+ for (i = 0; i < bm_pool->buf_num; i++) {
+ /* Allocate buffer back from the buffer manager */
+ mvpp2_read(priv, MVPP2_BM_PHY_ALLOC_REG(bm_pool->id));
+ }
+
bm_pool->buf_num = 0;
}
@@ -5501,6 +5508,21 @@ static int mvpp2_probe(struct udevice *dev)
return 0;
}
+/*
+ * Empty BM pool and stop its activity before the OS is started
+ */
+static int mvpp2_remove(struct udevice *dev)
+{
+ struct mvpp2_port *port = dev_get_priv(dev);
+ struct mvpp2 *priv = port->priv;
+ int i;
+
+ for (i = 0; i < MVPP2_BM_POOLS_NUM; i++)
+ mvpp2_bm_pool_destroy(dev, priv, &priv->bm_pools[i]);
+
+ return 0;
+}
+
static const struct eth_ops mvpp2_ops = {
.start = mvpp2_start,
.send = mvpp2_send,
@@ -5512,9 +5534,11 @@ static struct driver mvpp2_driver = {
.name = "mvpp2",
.id = UCLASS_ETH,
.probe = mvpp2_probe,
+ .remove = mvpp2_remove,
.ops = &mvpp2_ops,
.priv_auto_alloc_size = sizeof(struct mvpp2_port),
.platdata_auto_alloc_size = sizeof(struct eth_pdata),
+ .flags = DM_FLAG_ACTIVE_DMA,
};
/*
--
2.39.5