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openwrt/target/linux/generic/backport-5.15/775-v6.0-04-net-ethernet-stmicro-stmmac-generate-stmmac-dma-conf.patch
John Audia 59fe39f6fc kernel: bump 5.15 to 5.15.91 
Manually rebased:
  pending-5.15/103-kbuild-export-SUBARCH.patch

All other patches automatically rebased.

Build system: x86_64
Build-tested: bcm2711/RPi4B, filogic/xiaomi_redmi-router-ax6000-ubootmod
Run-tested: bcm2711/RPi4B, filogic/xiaomi_redmi-router-ax6000-ubootmod

Signed-off-by: John Audia <therealgraysky@proton.me>
2023-02-03 09:34:32 +01:00

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From ba39b344e9240a4a5fd4ab8178200b85cd1809da Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Sat, 23 Jul 2022 16:29:32 +0200
Subject: [PATCH 4/5] net: ethernet: stmicro: stmmac: generate stmmac dma conf
before open
Rework the driver to generate the stmmac dma_conf before stmmac_open.
This permits a function to first check if it's possible to allocate a
new dma_config and then pass it directly to __stmmac_open and "open" the
interface with the new configuration.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 462 +++++++++++-------
1 file changed, 289 insertions(+), 173 deletions(-)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1298,7 +1298,8 @@ static int stmmac_phy_setup(struct stmma
return 0;
}
-static void stmmac_display_rx_rings(struct stmmac_priv *priv)
+static void stmmac_display_rx_rings(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
u32 rx_cnt = priv->plat->rx_queues_to_use;
unsigned int desc_size;
@@ -1307,7 +1308,7 @@ static void stmmac_display_rx_rings(stru
/* Display RX rings */
for (queue = 0; queue < rx_cnt; queue++) {
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
pr_info("\tRX Queue %u rings\n", queue);
@@ -1320,12 +1321,13 @@ static void stmmac_display_rx_rings(stru
}
/* Display RX ring */
- stmmac_display_ring(priv, head_rx, priv->dma_conf.dma_rx_size, true,
+ stmmac_display_ring(priv, head_rx, dma_conf->dma_rx_size, true,
rx_q->dma_rx_phy, desc_size);
}
}
-static void stmmac_display_tx_rings(struct stmmac_priv *priv)
+static void stmmac_display_tx_rings(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
u32 tx_cnt = priv->plat->tx_queues_to_use;
unsigned int desc_size;
@@ -1334,7 +1336,7 @@ static void stmmac_display_tx_rings(stru
/* Display TX rings */
for (queue = 0; queue < tx_cnt; queue++) {
- struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue];
+ struct stmmac_tx_queue *tx_q = &dma_conf->tx_queue[queue];
pr_info("\tTX Queue %d rings\n", queue);
@@ -1349,18 +1351,19 @@ static void stmmac_display_tx_rings(stru
desc_size = sizeof(struct dma_desc);
}
- stmmac_display_ring(priv, head_tx, priv->dma_conf.dma_tx_size, false,
+ stmmac_display_ring(priv, head_tx, dma_conf->dma_tx_size, false,
tx_q->dma_tx_phy, desc_size);
}
}
-static void stmmac_display_rings(struct stmmac_priv *priv)
+static void stmmac_display_rings(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
/* Display RX ring */
- stmmac_display_rx_rings(priv);
+ stmmac_display_rx_rings(priv, dma_conf);
/* Display TX ring */
- stmmac_display_tx_rings(priv);
+ stmmac_display_tx_rings(priv, dma_conf);
}
static int stmmac_set_bfsize(int mtu, int bufsize)
@@ -1384,44 +1387,50 @@ static int stmmac_set_bfsize(int mtu, in
/**
* stmmac_clear_rx_descriptors - clear RX descriptors
* @priv: driver private structure
+ * @dma_conf: structure to take the dma data
* @queue: RX queue index
* Description: this function is called to clear the RX descriptors
* in case of both basic and extended descriptors are used.
*/
-static void stmmac_clear_rx_descriptors(struct stmmac_priv *priv, u32 queue)
+static void stmmac_clear_rx_descriptors(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
int i;
/* Clear the RX descriptors */
- for (i = 0; i < priv->dma_conf.dma_rx_size; i++)
+ for (i = 0; i < dma_conf->dma_rx_size; i++)
if (priv->extend_desc)
stmmac_init_rx_desc(priv, &rx_q->dma_erx[i].basic,
priv->use_riwt, priv->mode,
- (i == priv->dma_conf.dma_rx_size - 1),
- priv->dma_conf.dma_buf_sz);
+ (i == dma_conf->dma_rx_size - 1),
+ dma_conf->dma_buf_sz);
else
stmmac_init_rx_desc(priv, &rx_q->dma_rx[i],
priv->use_riwt, priv->mode,
- (i == priv->dma_conf.dma_rx_size - 1),
- priv->dma_conf.dma_buf_sz);
+ (i == dma_conf->dma_rx_size - 1),
+ dma_conf->dma_buf_sz);
}
/**
* stmmac_clear_tx_descriptors - clear tx descriptors
* @priv: driver private structure
+ * @dma_conf: structure to take the dma data
* @queue: TX queue index.
* Description: this function is called to clear the TX descriptors
* in case of both basic and extended descriptors are used.
*/
-static void stmmac_clear_tx_descriptors(struct stmmac_priv *priv, u32 queue)
+static void stmmac_clear_tx_descriptors(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue];
+ struct stmmac_tx_queue *tx_q = &dma_conf->tx_queue[queue];
int i;
/* Clear the TX descriptors */
- for (i = 0; i < priv->dma_conf.dma_tx_size; i++) {
- int last = (i == (priv->dma_conf.dma_tx_size - 1));
+ for (i = 0; i < dma_conf->dma_tx_size; i++) {
+ int last = (i == (dma_conf->dma_tx_size - 1));
struct dma_desc *p;
if (priv->extend_desc)
@@ -1438,10 +1447,12 @@ static void stmmac_clear_tx_descriptors(
/**
* stmmac_clear_descriptors - clear descriptors
* @priv: driver private structure
+ * @dma_conf: structure to take the dma data
* Description: this function is called to clear the TX and RX descriptors
* in case of both basic and extended descriptors are used.
*/
-static void stmmac_clear_descriptors(struct stmmac_priv *priv)
+static void stmmac_clear_descriptors(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
u32 rx_queue_cnt = priv->plat->rx_queues_to_use;
u32 tx_queue_cnt = priv->plat->tx_queues_to_use;
@@ -1449,16 +1460,17 @@ static void stmmac_clear_descriptors(str
/* Clear the RX descriptors */
for (queue = 0; queue < rx_queue_cnt; queue++)
- stmmac_clear_rx_descriptors(priv, queue);
+ stmmac_clear_rx_descriptors(priv, dma_conf, queue);
/* Clear the TX descriptors */
for (queue = 0; queue < tx_queue_cnt; queue++)
- stmmac_clear_tx_descriptors(priv, queue);
+ stmmac_clear_tx_descriptors(priv, dma_conf, queue);
}
/**
* stmmac_init_rx_buffers - init the RX descriptor buffer.
* @priv: driver private structure
+ * @dma_conf: structure to take the dma data
* @p: descriptor pointer
* @i: descriptor index
* @flags: gfp flag
@@ -1466,10 +1478,12 @@ static void stmmac_clear_descriptors(str
* Description: this function is called to allocate a receive buffer, perform
* the DMA mapping and init the descriptor.
*/
-static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
+static int stmmac_init_rx_buffers(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ struct dma_desc *p,
int i, gfp_t flags, u32 queue)
{
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i];
if (!buf->page) {
@@ -1494,7 +1508,7 @@ static int stmmac_init_rx_buffers(struct
buf->addr = page_pool_get_dma_addr(buf->page) + buf->page_offset;
stmmac_set_desc_addr(priv, p, buf->addr);
- if (priv->dma_conf.dma_buf_sz == BUF_SIZE_16KiB)
+ if (dma_conf->dma_buf_sz == BUF_SIZE_16KiB)
stmmac_init_desc3(priv, p);
return 0;
@@ -1503,12 +1517,13 @@ static int stmmac_init_rx_buffers(struct
/**
* stmmac_free_rx_buffer - free RX dma buffers
* @priv: private structure
- * @queue: RX queue index
+ * @rx_q: RX queue
* @i: buffer index.
*/
-static void stmmac_free_rx_buffer(struct stmmac_priv *priv, u32 queue, int i)
+static void stmmac_free_rx_buffer(struct stmmac_priv *priv,
+ struct stmmac_rx_queue *rx_q,
+ int i)
{
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i];
if (buf->page)
@@ -1523,12 +1538,15 @@ static void stmmac_free_rx_buffer(struct
/**
* stmmac_free_tx_buffer - free RX dma buffers
* @priv: private structure
+ * @dma_conf: structure to take the dma data
* @queue: RX queue index
* @i: buffer index.
*/
-static void stmmac_free_tx_buffer(struct stmmac_priv *priv, u32 queue, int i)
+static void stmmac_free_tx_buffer(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue, int i)
{
- struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue];
+ struct stmmac_tx_queue *tx_q = &dma_conf->tx_queue[queue];
if (tx_q->tx_skbuff_dma[i].buf &&
tx_q->tx_skbuff_dma[i].buf_type != STMMAC_TXBUF_T_XDP_TX) {
@@ -1567,23 +1585,28 @@ static void stmmac_free_tx_buffer(struct
/**
* dma_free_rx_skbufs - free RX dma buffers
* @priv: private structure
+ * @dma_conf: structure to take the dma data
* @queue: RX queue index
*/
-static void dma_free_rx_skbufs(struct stmmac_priv *priv, u32 queue)
+static void dma_free_rx_skbufs(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
int i;
- for (i = 0; i < priv->dma_conf.dma_rx_size; i++)
- stmmac_free_rx_buffer(priv, queue, i);
+ for (i = 0; i < dma_conf->dma_rx_size; i++)
+ stmmac_free_rx_buffer(priv, rx_q, i);
}
-static int stmmac_alloc_rx_buffers(struct stmmac_priv *priv, u32 queue,
- gfp_t flags)
+static int stmmac_alloc_rx_buffers(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue, gfp_t flags)
{
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
int i;
- for (i = 0; i < priv->dma_conf.dma_rx_size; i++) {
+ for (i = 0; i < dma_conf->dma_rx_size; i++) {
struct dma_desc *p;
int ret;
@@ -1592,7 +1615,7 @@ static int stmmac_alloc_rx_buffers(struc
else
p = rx_q->dma_rx + i;
- ret = stmmac_init_rx_buffers(priv, p, i, flags,
+ ret = stmmac_init_rx_buffers(priv, dma_conf, p, i, flags,
queue);
if (ret)
return ret;
@@ -1606,14 +1629,17 @@ static int stmmac_alloc_rx_buffers(struc
/**
* dma_free_rx_xskbufs - free RX dma buffers from XSK pool
* @priv: private structure
+ * @dma_conf: structure to take the dma data
* @queue: RX queue index
*/
-static void dma_free_rx_xskbufs(struct stmmac_priv *priv, u32 queue)
+static void dma_free_rx_xskbufs(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
int i;
- for (i = 0; i < priv->dma_conf.dma_rx_size; i++) {
+ for (i = 0; i < dma_conf->dma_rx_size; i++) {
struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i];
if (!buf->xdp)
@@ -1624,12 +1650,14 @@ static void dma_free_rx_xskbufs(struct s
}
}
-static int stmmac_alloc_rx_buffers_zc(struct stmmac_priv *priv, u32 queue)
+static int stmmac_alloc_rx_buffers_zc(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
int i;
- for (i = 0; i < priv->dma_conf.dma_rx_size; i++) {
+ for (i = 0; i < dma_conf->dma_rx_size; i++) {
struct stmmac_rx_buffer *buf;
dma_addr_t dma_addr;
struct dma_desc *p;
@@ -1664,22 +1692,25 @@ static struct xsk_buff_pool *stmmac_get_
/**
* __init_dma_rx_desc_rings - init the RX descriptor ring (per queue)
* @priv: driver private structure
+ * @dma_conf: structure to take the dma data
* @queue: RX queue index
* @flags: gfp flag.
* Description: this function initializes the DMA RX descriptors
* and allocates the socket buffers. It supports the chained and ring
* modes.
*/
-static int __init_dma_rx_desc_rings(struct stmmac_priv *priv, u32 queue, gfp_t flags)
+static int __init_dma_rx_desc_rings(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue, gfp_t flags)
{
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
int ret;
netif_dbg(priv, probe, priv->dev,
"(%s) dma_rx_phy=0x%08x\n", __func__,
(u32)rx_q->dma_rx_phy);
- stmmac_clear_rx_descriptors(priv, queue);
+ stmmac_clear_rx_descriptors(priv, dma_conf, queue);
xdp_rxq_info_unreg_mem_model(&rx_q->xdp_rxq);
@@ -1706,9 +1737,9 @@ static int __init_dma_rx_desc_rings(stru
/* RX XDP ZC buffer pool may not be populated, e.g.
* xdpsock TX-only.
*/
- stmmac_alloc_rx_buffers_zc(priv, queue);
+ stmmac_alloc_rx_buffers_zc(priv, dma_conf, queue);
} else {
- ret = stmmac_alloc_rx_buffers(priv, queue, flags);
+ ret = stmmac_alloc_rx_buffers(priv, dma_conf, queue, flags);
if (ret < 0)
return -ENOMEM;
}
@@ -1718,17 +1749,19 @@ static int __init_dma_rx_desc_rings(stru
if (priv->extend_desc)
stmmac_mode_init(priv, rx_q->dma_erx,
rx_q->dma_rx_phy,
- priv->dma_conf.dma_rx_size, 1);
+ dma_conf->dma_rx_size, 1);
else
stmmac_mode_init(priv, rx_q->dma_rx,
rx_q->dma_rx_phy,
- priv->dma_conf.dma_rx_size, 0);
+ dma_conf->dma_rx_size, 0);
}
return 0;
}
-static int init_dma_rx_desc_rings(struct net_device *dev, gfp_t flags)
+static int init_dma_rx_desc_rings(struct net_device *dev,
+ struct stmmac_dma_conf *dma_conf,
+ gfp_t flags)
{
struct stmmac_priv *priv = netdev_priv(dev);
u32 rx_count = priv->plat->rx_queues_to_use;
@@ -1740,7 +1773,7 @@ static int init_dma_rx_desc_rings(struct
"SKB addresses:\nskb\t\tskb data\tdma data\n");
for (queue = 0; queue < rx_count; queue++) {
- ret = __init_dma_rx_desc_rings(priv, queue, flags);
+ ret = __init_dma_rx_desc_rings(priv, dma_conf, queue, flags);
if (ret)
goto err_init_rx_buffers;
}
@@ -1749,12 +1782,12 @@ static int init_dma_rx_desc_rings(struct
err_init_rx_buffers:
while (queue >= 0) {
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
if (rx_q->xsk_pool)
- dma_free_rx_xskbufs(priv, queue);
+ dma_free_rx_xskbufs(priv, dma_conf, queue);
else
- dma_free_rx_skbufs(priv, queue);
+ dma_free_rx_skbufs(priv, dma_conf, queue);
rx_q->buf_alloc_num = 0;
rx_q->xsk_pool = NULL;
@@ -1771,14 +1804,17 @@ err_init_rx_buffers:
/**
* __init_dma_tx_desc_rings - init the TX descriptor ring (per queue)
* @priv: driver private structure
- * @queue : TX queue index
+ * @dma_conf: structure to take the dma data
+ * @queue: TX queue index
* Description: this function initializes the DMA TX descriptors
* and allocates the socket buffers. It supports the chained and ring
* modes.
*/
-static int __init_dma_tx_desc_rings(struct stmmac_priv *priv, u32 queue)
+static int __init_dma_tx_desc_rings(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue];
+ struct stmmac_tx_queue *tx_q = &dma_conf->tx_queue[queue];
int i;
netif_dbg(priv, probe, priv->dev,
@@ -1790,16 +1826,16 @@ static int __init_dma_tx_desc_rings(stru
if (priv->extend_desc)
stmmac_mode_init(priv, tx_q->dma_etx,
tx_q->dma_tx_phy,
- priv->dma_conf.dma_tx_size, 1);
+ dma_conf->dma_tx_size, 1);
else if (!(tx_q->tbs & STMMAC_TBS_AVAIL))
stmmac_mode_init(priv, tx_q->dma_tx,
tx_q->dma_tx_phy,
- priv->dma_conf.dma_tx_size, 0);
+ dma_conf->dma_tx_size, 0);
}
tx_q->xsk_pool = stmmac_get_xsk_pool(priv, queue);
- for (i = 0; i < priv->dma_conf.dma_tx_size; i++) {
+ for (i = 0; i < dma_conf->dma_tx_size; i++) {
struct dma_desc *p;
if (priv->extend_desc)
@@ -1821,7 +1857,8 @@ static int __init_dma_tx_desc_rings(stru
return 0;
}
-static int init_dma_tx_desc_rings(struct net_device *dev)
+static int init_dma_tx_desc_rings(struct net_device *dev,
+ struct stmmac_dma_conf *dma_conf)
{
struct stmmac_priv *priv = netdev_priv(dev);
u32 tx_queue_cnt;
@@ -1830,7 +1867,7 @@ static int init_dma_tx_desc_rings(struct
tx_queue_cnt = priv->plat->tx_queues_to_use;
for (queue = 0; queue < tx_queue_cnt; queue++)
- __init_dma_tx_desc_rings(priv, queue);
+ __init_dma_tx_desc_rings(priv, dma_conf, queue);
return 0;
}
@@ -1838,26 +1875,29 @@ static int init_dma_tx_desc_rings(struct
/**
* init_dma_desc_rings - init the RX/TX descriptor rings
* @dev: net device structure
+ * @dma_conf: structure to take the dma data
* @flags: gfp flag.
* Description: this function initializes the DMA RX/TX descriptors
* and allocates the socket buffers. It supports the chained and ring
* modes.
*/
-static int init_dma_desc_rings(struct net_device *dev, gfp_t flags)
+static int init_dma_desc_rings(struct net_device *dev,
+ struct stmmac_dma_conf *dma_conf,
+ gfp_t flags)
{
struct stmmac_priv *priv = netdev_priv(dev);
int ret;
- ret = init_dma_rx_desc_rings(dev, flags);
+ ret = init_dma_rx_desc_rings(dev, dma_conf, flags);
if (ret)
return ret;
- ret = init_dma_tx_desc_rings(dev);
+ ret = init_dma_tx_desc_rings(dev, dma_conf);
- stmmac_clear_descriptors(priv);
+ stmmac_clear_descriptors(priv, dma_conf);
if (netif_msg_hw(priv))
- stmmac_display_rings(priv);
+ stmmac_display_rings(priv, dma_conf);
return ret;
}
@@ -1865,17 +1905,20 @@ static int init_dma_desc_rings(struct ne
/**
* dma_free_tx_skbufs - free TX dma buffers
* @priv: private structure
+ * @dma_conf: structure to take the dma data
* @queue: TX queue index
*/
-static void dma_free_tx_skbufs(struct stmmac_priv *priv, u32 queue)
+static void dma_free_tx_skbufs(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue];
+ struct stmmac_tx_queue *tx_q = &dma_conf->tx_queue[queue];
int i;
tx_q->xsk_frames_done = 0;
- for (i = 0; i < priv->dma_conf.dma_tx_size; i++)
- stmmac_free_tx_buffer(priv, queue, i);
+ for (i = 0; i < dma_conf->dma_tx_size; i++)
+ stmmac_free_tx_buffer(priv, dma_conf, queue, i);
if (tx_q->xsk_pool && tx_q->xsk_frames_done) {
xsk_tx_completed(tx_q->xsk_pool, tx_q->xsk_frames_done);
@@ -1894,34 +1937,37 @@ static void stmmac_free_tx_skbufs(struct
u32 queue;
for (queue = 0; queue < tx_queue_cnt; queue++)
- dma_free_tx_skbufs(priv, queue);
+ dma_free_tx_skbufs(priv, &priv->dma_conf, queue);
}
/**
* __free_dma_rx_desc_resources - free RX dma desc resources (per queue)
* @priv: private structure
+ * @dma_conf: structure to take the dma data
* @queue: RX queue index
*/
-static void __free_dma_rx_desc_resources(struct stmmac_priv *priv, u32 queue)
+static void __free_dma_rx_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
/* Release the DMA RX socket buffers */
if (rx_q->xsk_pool)
- dma_free_rx_xskbufs(priv, queue);
+ dma_free_rx_xskbufs(priv, dma_conf, queue);
else
- dma_free_rx_skbufs(priv, queue);
+ dma_free_rx_skbufs(priv, dma_conf, queue);
rx_q->buf_alloc_num = 0;
rx_q->xsk_pool = NULL;
/* Free DMA regions of consistent memory previously allocated */
if (!priv->extend_desc)
- dma_free_coherent(priv->device, priv->dma_conf.dma_rx_size *
+ dma_free_coherent(priv->device, dma_conf->dma_rx_size *
sizeof(struct dma_desc),
rx_q->dma_rx, rx_q->dma_rx_phy);
else
- dma_free_coherent(priv->device, priv->dma_conf.dma_rx_size *
+ dma_free_coherent(priv->device, dma_conf->dma_rx_size *
sizeof(struct dma_extended_desc),
rx_q->dma_erx, rx_q->dma_rx_phy);
@@ -1933,29 +1979,33 @@ static void __free_dma_rx_desc_resources
page_pool_destroy(rx_q->page_pool);
}
-static void free_dma_rx_desc_resources(struct stmmac_priv *priv)
+static void free_dma_rx_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
u32 rx_count = priv->plat->rx_queues_to_use;
u32 queue;
/* Free RX queue resources */
for (queue = 0; queue < rx_count; queue++)
- __free_dma_rx_desc_resources(priv, queue);
+ __free_dma_rx_desc_resources(priv, dma_conf, queue);
}
/**
* __free_dma_tx_desc_resources - free TX dma desc resources (per queue)
* @priv: private structure
+ * @dma_conf: structure to take the dma data
* @queue: TX queue index
*/
-static void __free_dma_tx_desc_resources(struct stmmac_priv *priv, u32 queue)
+static void __free_dma_tx_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue];
+ struct stmmac_tx_queue *tx_q = &dma_conf->tx_queue[queue];
size_t size;
void *addr;
/* Release the DMA TX socket buffers */
- dma_free_tx_skbufs(priv, queue);
+ dma_free_tx_skbufs(priv, dma_conf, queue);
if (priv->extend_desc) {
size = sizeof(struct dma_extended_desc);
@@ -1968,7 +2018,7 @@ static void __free_dma_tx_desc_resources
addr = tx_q->dma_tx;
}
- size *= priv->dma_conf.dma_tx_size;
+ size *= dma_conf->dma_tx_size;
dma_free_coherent(priv->device, size, addr, tx_q->dma_tx_phy);
@@ -1976,28 +2026,32 @@ static void __free_dma_tx_desc_resources
kfree(tx_q->tx_skbuff);
}
-static void free_dma_tx_desc_resources(struct stmmac_priv *priv)
+static void free_dma_tx_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
u32 tx_count = priv->plat->tx_queues_to_use;
u32 queue;
/* Free TX queue resources */
for (queue = 0; queue < tx_count; queue++)
- __free_dma_tx_desc_resources(priv, queue);
+ __free_dma_tx_desc_resources(priv, dma_conf, queue);
}
/**
* __alloc_dma_rx_desc_resources - alloc RX resources (per queue).
* @priv: private structure
+ * @dma_conf: structure to take the dma data
* @queue: RX queue index
* Description: according to which descriptor can be used (extend or basic)
* this function allocates the resources for TX and RX paths. In case of
* reception, for example, it pre-allocated the RX socket buffer in order to
* allow zero-copy mechanism.
*/
-static int __alloc_dma_rx_desc_resources(struct stmmac_priv *priv, u32 queue)
+static int __alloc_dma_rx_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue];
+ struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue];
struct stmmac_channel *ch = &priv->channel[queue];
bool xdp_prog = stmmac_xdp_is_enabled(priv);
struct page_pool_params pp_params = { 0 };
@@ -2009,8 +2063,8 @@ static int __alloc_dma_rx_desc_resources
rx_q->priv_data = priv;
pp_params.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV;
- pp_params.pool_size = priv->dma_conf.dma_rx_size;
- num_pages = DIV_ROUND_UP(priv->dma_conf.dma_buf_sz, PAGE_SIZE);
+ pp_params.pool_size = dma_conf->dma_rx_size;
+ num_pages = DIV_ROUND_UP(dma_conf->dma_buf_sz, PAGE_SIZE);
pp_params.order = ilog2(num_pages);
pp_params.nid = dev_to_node(priv->device);
pp_params.dev = priv->device;
@@ -2025,7 +2079,7 @@ static int __alloc_dma_rx_desc_resources
return ret;
}
- rx_q->buf_pool = kcalloc(priv->dma_conf.dma_rx_size,
+ rx_q->buf_pool = kcalloc(dma_conf->dma_rx_size,
sizeof(*rx_q->buf_pool),
GFP_KERNEL);
if (!rx_q->buf_pool)
@@ -2033,7 +2087,7 @@ static int __alloc_dma_rx_desc_resources
if (priv->extend_desc) {
rx_q->dma_erx = dma_alloc_coherent(priv->device,
- priv->dma_conf.dma_rx_size *
+ dma_conf->dma_rx_size *
sizeof(struct dma_extended_desc),
&rx_q->dma_rx_phy,
GFP_KERNEL);
@@ -2042,7 +2096,7 @@ static int __alloc_dma_rx_desc_resources
} else {
rx_q->dma_rx = dma_alloc_coherent(priv->device,
- priv->dma_conf.dma_rx_size *
+ dma_conf->dma_rx_size *
sizeof(struct dma_desc),
&rx_q->dma_rx_phy,
GFP_KERNEL);
@@ -2067,7 +2121,8 @@ static int __alloc_dma_rx_desc_resources
return 0;
}
-static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv)
+static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
u32 rx_count = priv->plat->rx_queues_to_use;
u32 queue;
@@ -2075,7 +2130,7 @@ static int alloc_dma_rx_desc_resources(s
/* RX queues buffers and DMA */
for (queue = 0; queue < rx_count; queue++) {
- ret = __alloc_dma_rx_desc_resources(priv, queue);
+ ret = __alloc_dma_rx_desc_resources(priv, dma_conf, queue);
if (ret)
goto err_dma;
}
@@ -2083,7 +2138,7 @@ static int alloc_dma_rx_desc_resources(s
return 0;
err_dma:
- free_dma_rx_desc_resources(priv);
+ free_dma_rx_desc_resources(priv, dma_conf);
return ret;
}
@@ -2091,28 +2146,31 @@ err_dma:
/**
* __alloc_dma_tx_desc_resources - alloc TX resources (per queue).
* @priv: private structure
+ * @dma_conf: structure to take the dma data
* @queue: TX queue index
* Description: according to which descriptor can be used (extend or basic)
* this function allocates the resources for TX and RX paths. In case of
* reception, for example, it pre-allocated the RX socket buffer in order to
* allow zero-copy mechanism.
*/
-static int __alloc_dma_tx_desc_resources(struct stmmac_priv *priv, u32 queue)
+static int __alloc_dma_tx_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf,
+ u32 queue)
{
- struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue];
+ struct stmmac_tx_queue *tx_q = &dma_conf->tx_queue[queue];
size_t size;
void *addr;
tx_q->queue_index = queue;
tx_q->priv_data = priv;
- tx_q->tx_skbuff_dma = kcalloc(priv->dma_conf.dma_tx_size,
+ tx_q->tx_skbuff_dma = kcalloc(dma_conf->dma_tx_size,
sizeof(*tx_q->tx_skbuff_dma),
GFP_KERNEL);
if (!tx_q->tx_skbuff_dma)
return -ENOMEM;
- tx_q->tx_skbuff = kcalloc(priv->dma_conf.dma_tx_size,
+ tx_q->tx_skbuff = kcalloc(dma_conf->dma_tx_size,
sizeof(struct sk_buff *),
GFP_KERNEL);
if (!tx_q->tx_skbuff)
@@ -2125,7 +2183,7 @@ static int __alloc_dma_tx_desc_resources
else
size = sizeof(struct dma_desc);
- size *= priv->dma_conf.dma_tx_size;
+ size *= dma_conf->dma_tx_size;
addr = dma_alloc_coherent(priv->device, size,
&tx_q->dma_tx_phy, GFP_KERNEL);
@@ -2142,7 +2200,8 @@ static int __alloc_dma_tx_desc_resources
return 0;
}
-static int alloc_dma_tx_desc_resources(struct stmmac_priv *priv)
+static int alloc_dma_tx_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
u32 tx_count = priv->plat->tx_queues_to_use;
u32 queue;
@@ -2150,7 +2209,7 @@ static int alloc_dma_tx_desc_resources(s
/* TX queues buffers and DMA */
for (queue = 0; queue < tx_count; queue++) {
- ret = __alloc_dma_tx_desc_resources(priv, queue);
+ ret = __alloc_dma_tx_desc_resources(priv, dma_conf, queue);
if (ret)
goto err_dma;
}
@@ -2158,27 +2217,29 @@ static int alloc_dma_tx_desc_resources(s
return 0;
err_dma:
- free_dma_tx_desc_resources(priv);
+ free_dma_tx_desc_resources(priv, dma_conf);
return ret;
}
/**
* alloc_dma_desc_resources - alloc TX/RX resources.
* @priv: private structure
+ * @dma_conf: structure to take the dma data
* Description: according to which descriptor can be used (extend or basic)
* this function allocates the resources for TX and RX paths. In case of
* reception, for example, it pre-allocated the RX socket buffer in order to
* allow zero-copy mechanism.
*/
-static int alloc_dma_desc_resources(struct stmmac_priv *priv)
+static int alloc_dma_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
/* RX Allocation */
- int ret = alloc_dma_rx_desc_resources(priv);
+ int ret = alloc_dma_rx_desc_resources(priv, dma_conf);
if (ret)
return ret;
- ret = alloc_dma_tx_desc_resources(priv);
+ ret = alloc_dma_tx_desc_resources(priv, dma_conf);
return ret;
}
@@ -2186,16 +2247,18 @@ static int alloc_dma_desc_resources(stru
/**
* free_dma_desc_resources - free dma desc resources
* @priv: private structure
+ * @dma_conf: structure to take the dma data
*/
-static void free_dma_desc_resources(struct stmmac_priv *priv)
+static void free_dma_desc_resources(struct stmmac_priv *priv,
+ struct stmmac_dma_conf *dma_conf)
{
/* Release the DMA TX socket buffers */
- free_dma_tx_desc_resources(priv);
+ free_dma_tx_desc_resources(priv, dma_conf);
/* Release the DMA RX socket buffers later
* to ensure all pending XDP_TX buffers are returned.
*/
- free_dma_rx_desc_resources(priv);
+ free_dma_rx_desc_resources(priv, dma_conf);
}
/**
@@ -2684,8 +2747,8 @@ static void stmmac_tx_err(struct stmmac_
netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, chan));
stmmac_stop_tx_dma(priv, chan);
- dma_free_tx_skbufs(priv, chan);
- stmmac_clear_tx_descriptors(priv, chan);
+ dma_free_tx_skbufs(priv, &priv->dma_conf, chan);
+ stmmac_clear_tx_descriptors(priv, &priv->dma_conf, chan);
stmmac_reset_tx_queue(priv, chan);
stmmac_init_tx_chan(priv, priv->ioaddr, priv->plat->dma_cfg,
tx_q->dma_tx_phy, chan);
@@ -3682,19 +3745,93 @@ static int stmmac_request_irq(struct net
}
/**
- * stmmac_open - open entry point of the driver
+ * stmmac_setup_dma_desc - Generate a dma_conf and allocate DMA queue
+ * @priv: driver private structure
+ * @mtu: MTU to setup the dma queue and buf with
+ * Description: Allocate and generate a dma_conf based on the provided MTU.
+ * Allocate the Tx/Rx DMA queue and init them.
+ * Return value:
+ * the dma_conf allocated struct on success and an appropriate ERR_PTR on failure.
+ */
+static struct stmmac_dma_conf *
+stmmac_setup_dma_desc(struct stmmac_priv *priv, unsigned int mtu)
+{
+ struct stmmac_dma_conf *dma_conf;
+ int chan, bfsize, ret;
+
+ dma_conf = kzalloc(sizeof(*dma_conf), GFP_KERNEL);
+ if (!dma_conf) {
+ netdev_err(priv->dev, "%s: DMA conf allocation failed\n",
+ __func__);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ bfsize = stmmac_set_16kib_bfsize(priv, mtu);
+ if (bfsize < 0)
+ bfsize = 0;
+
+ if (bfsize < BUF_SIZE_16KiB)
+ bfsize = stmmac_set_bfsize(mtu, 0);
+
+ dma_conf->dma_buf_sz = bfsize;
+ /* Chose the tx/rx size from the already defined one in the
+ * priv struct. (if defined)
+ */
+ dma_conf->dma_tx_size = priv->dma_conf.dma_tx_size;
+ dma_conf->dma_rx_size = priv->dma_conf.dma_rx_size;
+
+ if (!dma_conf->dma_tx_size)
+ dma_conf->dma_tx_size = DMA_DEFAULT_TX_SIZE;
+ if (!dma_conf->dma_rx_size)
+ dma_conf->dma_rx_size = DMA_DEFAULT_RX_SIZE;
+
+ /* Earlier check for TBS */
+ for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) {
+ struct stmmac_tx_queue *tx_q = &dma_conf->tx_queue[chan];
+ int tbs_en = priv->plat->tx_queues_cfg[chan].tbs_en;
+
+ /* Setup per-TXQ tbs flag before TX descriptor alloc */
+ tx_q->tbs |= tbs_en ? STMMAC_TBS_AVAIL : 0;
+ }
+
+ ret = alloc_dma_desc_resources(priv, dma_conf);
+ if (ret < 0) {
+ netdev_err(priv->dev, "%s: DMA descriptors allocation failed\n",
+ __func__);
+ goto alloc_error;
+ }
+
+ ret = init_dma_desc_rings(priv->dev, dma_conf, GFP_KERNEL);
+ if (ret < 0) {
+ netdev_err(priv->dev, "%s: DMA descriptors initialization failed\n",
+ __func__);
+ goto init_error;
+ }
+
+ return dma_conf;
+
+init_error:
+ free_dma_desc_resources(priv, dma_conf);
+alloc_error:
+ kfree(dma_conf);
+ return ERR_PTR(ret);
+}
+
+/**
+ * __stmmac_open - open entry point of the driver
* @dev : pointer to the device structure.
+ * @dma_conf : structure to take the dma data
* Description:
* This function is the open entry point of the driver.
* Return value:
* 0 on success and an appropriate (-)ve integer as defined in errno.h
* file on failure.
*/
-static int stmmac_open(struct net_device *dev)
+static int __stmmac_open(struct net_device *dev,
+ struct stmmac_dma_conf *dma_conf)
{
struct stmmac_priv *priv = netdev_priv(dev);
int mode = priv->plat->phy_interface;
- int bfsize = 0;
u32 chan;
int ret;
@@ -3721,45 +3858,10 @@ static int stmmac_open(struct net_device
memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
priv->xstats.threshold = tc;
- bfsize = stmmac_set_16kib_bfsize(priv, dev->mtu);
- if (bfsize < 0)
- bfsize = 0;
-
- if (bfsize < BUF_SIZE_16KiB)
- bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_conf.dma_buf_sz);
-
- priv->dma_conf.dma_buf_sz = bfsize;
- buf_sz = bfsize;
-
priv->rx_copybreak = STMMAC_RX_COPYBREAK;
- if (!priv->dma_conf.dma_tx_size)
- priv->dma_conf.dma_tx_size = DMA_DEFAULT_TX_SIZE;
- if (!priv->dma_conf.dma_rx_size)
- priv->dma_conf.dma_rx_size = DMA_DEFAULT_RX_SIZE;
-
- /* Earlier check for TBS */
- for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) {
- struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[chan];
- int tbs_en = priv->plat->tx_queues_cfg[chan].tbs_en;
-
- /* Setup per-TXQ tbs flag before TX descriptor alloc */
- tx_q->tbs |= tbs_en ? STMMAC_TBS_AVAIL : 0;
- }
-
- ret = alloc_dma_desc_resources(priv);
- if (ret < 0) {
- netdev_err(priv->dev, "%s: DMA descriptors allocation failed\n",
- __func__);
- goto dma_desc_error;
- }
-
- ret = init_dma_desc_rings(dev, GFP_KERNEL);
- if (ret < 0) {
- netdev_err(priv->dev, "%s: DMA descriptors initialization failed\n",
- __func__);
- goto init_error;
- }
+ buf_sz = dma_conf->dma_buf_sz;
+ memcpy(&priv->dma_conf, dma_conf, sizeof(*dma_conf));
if (priv->plat->serdes_powerup) {
ret = priv->plat->serdes_powerup(dev, priv->plat->bsp_priv);
@@ -3802,14 +3904,28 @@ irq_error:
stmmac_hw_teardown(dev);
init_error:
- free_dma_desc_resources(priv);
-dma_desc_error:
+ free_dma_desc_resources(priv, &priv->dma_conf);
phylink_disconnect_phy(priv->phylink);
init_phy_error:
pm_runtime_put(priv->device);
return ret;
}
+static int stmmac_open(struct net_device *dev)
+{
+ struct stmmac_priv *priv = netdev_priv(dev);
+ struct stmmac_dma_conf *dma_conf;
+ int ret;
+
+ dma_conf = stmmac_setup_dma_desc(priv, dev->mtu);
+ if (IS_ERR(dma_conf))
+ return PTR_ERR(dma_conf);
+
+ ret = __stmmac_open(dev, dma_conf);
+ kfree(dma_conf);
+ return ret;
+}
+
static void stmmac_fpe_stop_wq(struct stmmac_priv *priv)
{
set_bit(__FPE_REMOVING, &priv->fpe_task_state);
@@ -3856,7 +3972,7 @@ static int stmmac_release(struct net_dev
stmmac_stop_all_dma(priv);
/* Release and free the Rx/Tx resources */
- free_dma_desc_resources(priv);
+ free_dma_desc_resources(priv, &priv->dma_conf);
/* Disable the MAC Rx/Tx */
stmmac_mac_set(priv, priv->ioaddr, false);
@@ -6395,7 +6511,7 @@ void stmmac_disable_rx_queue(struct stmm
spin_unlock_irqrestore(&ch->lock, flags);
stmmac_stop_rx_dma(priv, queue);
- __free_dma_rx_desc_resources(priv, queue);
+ __free_dma_rx_desc_resources(priv, &priv->dma_conf, queue);
}
void stmmac_enable_rx_queue(struct stmmac_priv *priv, u32 queue)
@@ -6406,21 +6522,21 @@ void stmmac_enable_rx_queue(struct stmma
u32 buf_size;
int ret;
- ret = __alloc_dma_rx_desc_resources(priv, queue);
+ ret = __alloc_dma_rx_desc_resources(priv, &priv->dma_conf, queue);
if (ret) {
netdev_err(priv->dev, "Failed to alloc RX desc.\n");
return;
}
- ret = __init_dma_rx_desc_rings(priv, queue, GFP_KERNEL);
+ ret = __init_dma_rx_desc_rings(priv, &priv->dma_conf, queue, GFP_KERNEL);
if (ret) {
- __free_dma_rx_desc_resources(priv, queue);
+ __free_dma_rx_desc_resources(priv, &priv->dma_conf, queue);
netdev_err(priv->dev, "Failed to init RX desc.\n");
return;
}
stmmac_reset_rx_queue(priv, queue);
- stmmac_clear_rx_descriptors(priv, queue);
+ stmmac_clear_rx_descriptors(priv, &priv->dma_conf, queue);
stmmac_init_rx_chan(priv, priv->ioaddr, priv->plat->dma_cfg,
rx_q->dma_rx_phy, rx_q->queue_index);
@@ -6458,7 +6574,7 @@ void stmmac_disable_tx_queue(struct stmm
spin_unlock_irqrestore(&ch->lock, flags);
stmmac_stop_tx_dma(priv, queue);
- __free_dma_tx_desc_resources(priv, queue);
+ __free_dma_tx_desc_resources(priv, &priv->dma_conf, queue);
}
void stmmac_enable_tx_queue(struct stmmac_priv *priv, u32 queue)
@@ -6468,21 +6584,21 @@ void stmmac_enable_tx_queue(struct stmma
unsigned long flags;
int ret;
- ret = __alloc_dma_tx_desc_resources(priv, queue);
+ ret = __alloc_dma_tx_desc_resources(priv, &priv->dma_conf, queue);
if (ret) {
netdev_err(priv->dev, "Failed to alloc TX desc.\n");
return;
}
- ret = __init_dma_tx_desc_rings(priv, queue);
+ ret = __init_dma_tx_desc_rings(priv, &priv->dma_conf, queue);
if (ret) {
- __free_dma_tx_desc_resources(priv, queue);
+ __free_dma_tx_desc_resources(priv, &priv->dma_conf, queue);
netdev_err(priv->dev, "Failed to init TX desc.\n");
return;
}
stmmac_reset_tx_queue(priv, queue);
- stmmac_clear_tx_descriptors(priv, queue);
+ stmmac_clear_tx_descriptors(priv, &priv->dma_conf, queue);
stmmac_init_tx_chan(priv, priv->ioaddr, priv->plat->dma_cfg,
tx_q->dma_tx_phy, tx_q->queue_index);
@@ -6522,7 +6638,7 @@ void stmmac_xdp_release(struct net_devic
stmmac_stop_all_dma(priv);
/* Release and free the Rx/Tx resources */
- free_dma_desc_resources(priv);
+ free_dma_desc_resources(priv, &priv->dma_conf);
/* Disable the MAC Rx/Tx */
stmmac_mac_set(priv, priv->ioaddr, false);
@@ -6547,14 +6663,14 @@ int stmmac_xdp_open(struct net_device *d
u32 chan;
int ret;
- ret = alloc_dma_desc_resources(priv);
+ ret = alloc_dma_desc_resources(priv, &priv->dma_conf);
if (ret < 0) {
netdev_err(dev, "%s: DMA descriptors allocation failed\n",
__func__);
goto dma_desc_error;
}
- ret = init_dma_desc_rings(dev, GFP_KERNEL);
+ ret = init_dma_desc_rings(dev, &priv->dma_conf, GFP_KERNEL);
if (ret < 0) {
netdev_err(dev, "%s: DMA descriptors initialization failed\n",
__func__);
@@ -6636,7 +6752,7 @@ irq_error:
stmmac_hw_teardown(dev);
init_error:
- free_dma_desc_resources(priv);
+ free_dma_desc_resources(priv, &priv->dma_conf);
dma_desc_error:
return ret;
}
@@ -7497,7 +7613,7 @@ int stmmac_resume(struct device *dev)
stmmac_reset_queues_param(priv);
stmmac_free_tx_skbufs(priv);
- stmmac_clear_descriptors(priv);
+ stmmac_clear_descriptors(priv, &priv->dma_conf);
stmmac_hw_setup(ndev, false);
stmmac_init_coalesce(priv);
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