microsoft
/
WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность

net: mvpp2: simplify the Tx desc set DMA logic 

Two functions were always used to set the DMA addresses in Tx
descriptors, because this address is split into a base+offset in the
descriptors. A mask was used to come up with the base and offset
addresses and two functions were called, mvpp2_txdesc_dma_addr_set() and
mvpp2_txdesc_offset_set().

This patch moves the base+offset calculation logic to
mvpp2_txdesc_dma_addr_set(), and removes mvpp2_txdesc_offset_set() to
simplify things.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Antoine Tenart 2017-10-30 11:23:33 +01:00 коммит произвёл David S. Miller
Родитель 02856a3ba6
Коммит 6eb5d375ce
1 изменённых файлов: 13 добавлений и 26 удалений
Показать статистику Скачать Patch файл Скачать Diff файл Показать все файлы Свернуть все файлы

39
drivers/net/ethernet/marvell/mvpp2.c
Просмотреть файл

@ -1290,13 +1290,20 @@ static void mvpp2_txdesc_dma_addr_set(struct mvpp2_port *port,
struct mvpp2_tx_desc *tx_desc,
dma_addr_t dma_addr)
{
dma_addr_t addr, offset;
addr = dma_addr & ~MVPP2_TX_DESC_ALIGN;
offset = dma_addr & MVPP2_TX_DESC_ALIGN;
if (port->priv->hw_version == MVPP21) {
tx_desc->pp21.buf_dma_addr = dma_addr;
tx_desc->pp21.buf_dma_addr = addr;
tx_desc->pp21.packet_offset = offset;
} else {
u64 val = (u64)dma_addr;
u64 val = (u64)addr;
tx_desc->pp22.buf_dma_addr_ptp &= ~GENMASK_ULL(40, 0);
tx_desc->pp22.buf_dma_addr_ptp |= val;
tx_desc->pp22.packet_offset = offset;
}
}
@ -1339,16 +1346,6 @@ static void mvpp2_txdesc_cmd_set(struct mvpp2_port *port,
tx_desc->pp22.command = command;
}
static void mvpp2_txdesc_offset_set(struct mvpp2_port *port,
struct mvpp2_tx_desc *tx_desc,
unsigned int offset)
{
if (port->priv->hw_version == MVPP21)
tx_desc->pp21.packet_offset = offset;
else
tx_desc->pp22.packet_offset = offset;
}
static unsigned int mvpp2_txdesc_offset_get(struct mvpp2_port *port,
struct mvpp2_tx_desc *tx_desc)
{
@ -6292,10 +6289,7 @@ static int mvpp2_tx_frag_process(struct mvpp2_port *port, struct sk_buff *skb,
goto cleanup;
}
mvpp2_txdesc_offset_set(port, tx_desc,
buf_dma_addr & MVPP2_TX_DESC_ALIGN);
mvpp2_txdesc_dma_addr_set(port, tx_desc,
buf_dma_addr & ~MVPP2_TX_DESC_ALIGN);
mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr);
if (i == (skb_shinfo(skb)->nr_frags - 1)) {
/* Last descriptor */
@ -6338,8 +6332,7 @@ static inline void mvpp2_tso_put_hdr(struct sk_buff *skb,
addr = txq_pcpu->tso_headers_dma +
txq_pcpu->txq_put_index * TSO_HEADER_SIZE;
mvpp2_txdesc_offset_set(port, tx_desc, addr & MVPP2_TX_DESC_ALIGN);
mvpp2_txdesc_dma_addr_set(port, tx_desc, addr & ~MVPP2_TX_DESC_ALIGN);
mvpp2_txdesc_dma_addr_set(port, tx_desc, addr);
mvpp2_txdesc_cmd_set(port, tx_desc, mvpp2_skb_tx_csum(port, skb) |
MVPP2_TXD_F_DESC |
@ -6368,10 +6361,7 @@ static inline int mvpp2_tso_put_data(struct sk_buff *skb,
return -ENOMEM;
}
mvpp2_txdesc_offset_set(port, tx_desc,
buf_dma_addr & MVPP2_TX_DESC_ALIGN);
mvpp2_txdesc_dma_addr_set(port, tx_desc,
buf_dma_addr & ~MVPP2_TX_DESC_ALIGN);
mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr);
if (!left) {
mvpp2_txdesc_cmd_set(port, tx_desc, MVPP2_TXD_L_DESC);
@ -6483,10 +6473,7 @@ static int mvpp2_tx(struct sk_buff *skb, struct net_device *dev)
goto out;
}
mvpp2_txdesc_offset_set(port, tx_desc,
buf_dma_addr & MVPP2_TX_DESC_ALIGN);
mvpp2_txdesc_dma_addr_set(port, tx_desc,
buf_dma_addr & ~MVPP2_TX_DESC_ALIGN);
mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr);
tx_cmd = mvpp2_skb_tx_csum(port, skb);