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kernel_optimize_test/drivers/net/ethernet/moxa/moxart_ether.c
Kees Cook 6da2ec5605 treewide: kmalloc() -> kmalloc_array() 
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This
patch replaces cases of:

        kmalloc(a * b, gfp)

with:
        kmalloc_array(a * b, gfp)

as well as handling cases of:

        kmalloc(a * b * c, gfp)

with:

        kmalloc(array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        kmalloc_array(array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        kmalloc(4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

The tools/ directory was manually excluded, since it has its own
implementation of kmalloc().

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@

(
  kmalloc(
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  kmalloc(
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  kmalloc(
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  kmalloc(
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  kmalloc(
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  kmalloc(
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  kmalloc(
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  kmalloc(
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  kmalloc(
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  kmalloc(
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- kmalloc
+ kmalloc_array
  (
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@

- kmalloc
+ kmalloc_array
  (
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  kmalloc(
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kmalloc(
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kmalloc(
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kmalloc(
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kmalloc(
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kmalloc(
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kmalloc(
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kmalloc(
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  kmalloc(
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kmalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kmalloc(
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kmalloc(
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kmalloc(
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  kmalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@

(
  kmalloc(
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kmalloc(
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kmalloc(
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kmalloc(
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kmalloc(
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kmalloc(
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kmalloc(
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kmalloc(
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  kmalloc(C1 * C2 * C3, ...)
|
  kmalloc(
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kmalloc(
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kmalloc(
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  kmalloc(
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  kmalloc(sizeof(THING) * C2, ...)
|
  kmalloc(sizeof(TYPE) * C2, ...)
|
  kmalloc(C1 * C2 * C3, ...)
|
  kmalloc(C1 * C2, ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	(E1) * E2
+	E1, E2
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- kmalloc
+ kmalloc_array
  (
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 16:19:22 -07:00

590 lines
15 KiB
C
Raw Blame History

/* MOXA ART Ethernet (RTL8201CP) driver.
*
* Copyright (C) 2013 Jonas Jensen
*
* Jonas Jensen <jonas.jensen@gmail.com>
*
* Based on code from
* Moxa Technology Co., Ltd. <www.moxa.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/dma-mapping.h>
#include <linux/ethtool.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/crc32.h>
#include <linux/crc32c.h>
#include <linux/circ_buf.h>
#include "moxart_ether.h"
static inline void moxart_desc_write(u32 data, u32 *desc)
{
*desc = cpu_to_le32(data);
}
static inline u32 moxart_desc_read(u32 *desc)
{
return le32_to_cpu(*desc);
}
static inline void moxart_emac_write(struct net_device *ndev,
unsigned int reg, unsigned long value)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
writel(value, priv->base + reg);
}
static void moxart_update_mac_address(struct net_device *ndev)
{
moxart_emac_write(ndev, REG_MAC_MS_ADDRESS,
((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1])));
moxart_emac_write(ndev, REG_MAC_MS_ADDRESS + 4,
((ndev->dev_addr[2] << 24) |
(ndev->dev_addr[3] << 16) |
(ndev->dev_addr[4] << 8) |
(ndev->dev_addr[5])));
}
static int moxart_set_mac_address(struct net_device *ndev, void *addr)
{
struct sockaddr *address = addr;
if (!is_valid_ether_addr(address->sa_data))
return -EADDRNOTAVAIL;
memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len);
moxart_update_mac_address(ndev);
return 0;
}
static void moxart_mac_free_memory(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
int i;
for (i = 0; i < RX_DESC_NUM; i++)
dma_unmap_single(&ndev->dev, priv->rx_mapping[i],
priv->rx_buf_size, DMA_FROM_DEVICE);
if (priv->tx_desc_base)
dma_free_coherent(NULL, TX_REG_DESC_SIZE * TX_DESC_NUM,
priv->tx_desc_base, priv->tx_base);
if (priv->rx_desc_base)
dma_free_coherent(NULL, RX_REG_DESC_SIZE * RX_DESC_NUM,
priv->rx_desc_base, priv->rx_base);
kfree(priv->tx_buf_base);
kfree(priv->rx_buf_base);
}
static void moxart_mac_reset(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
writel(SW_RST, priv->base + REG_MAC_CTRL);
while (readl(priv->base + REG_MAC_CTRL) & SW_RST)
mdelay(10);
writel(0, priv->base + REG_INTERRUPT_MASK);
priv->reg_maccr = RX_BROADPKT | FULLDUP | CRC_APD | RX_FTL;
}
static void moxart_mac_enable(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
writel(0x00001010, priv->base + REG_INT_TIMER_CTRL);
writel(0x00000001, priv->base + REG_APOLL_TIMER_CTRL);
writel(0x00000390, priv->base + REG_DMA_BLEN_CTRL);
priv->reg_imr |= (RPKT_FINISH_M | XPKT_FINISH_M);
writel(priv->reg_imr, priv->base + REG_INTERRUPT_MASK);
priv->reg_maccr |= (RCV_EN | XMT_EN | RDMA_EN | XDMA_EN);
writel(priv->reg_maccr, priv->base + REG_MAC_CTRL);
}
static void moxart_mac_setup_desc_ring(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
void *desc;
int i;
for (i = 0; i < TX_DESC_NUM; i++) {
desc = priv->tx_desc_base + i * TX_REG_DESC_SIZE;
memset(desc, 0, TX_REG_DESC_SIZE);
priv->tx_buf[i] = priv->tx_buf_base + priv->tx_buf_size * i;
}
moxart_desc_write(TX_DESC1_END, desc + TX_REG_OFFSET_DESC1);
priv->tx_head = 0;
priv->tx_tail = 0;
for (i = 0; i < RX_DESC_NUM; i++) {
desc = priv->rx_desc_base + i * RX_REG_DESC_SIZE;
memset(desc, 0, RX_REG_DESC_SIZE);
moxart_desc_write(RX_DESC0_DMA_OWN, desc + RX_REG_OFFSET_DESC0);
moxart_desc_write(RX_BUF_SIZE & RX_DESC1_BUF_SIZE_MASK,
desc + RX_REG_OFFSET_DESC1);
priv->rx_buf[i] = priv->rx_buf_base + priv->rx_buf_size * i;
priv->rx_mapping[i] = dma_map_single(&ndev->dev,
priv->rx_buf[i],
priv->rx_buf_size,
DMA_FROM_DEVICE);
if (dma_mapping_error(&ndev->dev, priv->rx_mapping[i]))
netdev_err(ndev, "DMA mapping error\n");
moxart_desc_write(priv->rx_mapping[i],
desc + RX_REG_OFFSET_DESC2 + RX_DESC2_ADDRESS_PHYS);
moxart_desc_write((uintptr_t)priv->rx_buf[i],
desc + RX_REG_OFFSET_DESC2 + RX_DESC2_ADDRESS_VIRT);
}
moxart_desc_write(RX_DESC1_END, desc + RX_REG_OFFSET_DESC1);
priv->rx_head = 0;
/* reset the MAC controller TX/RX descriptor base address */
writel(priv->tx_base, priv->base + REG_TXR_BASE_ADDRESS);
writel(priv->rx_base, priv->base + REG_RXR_BASE_ADDRESS);
}
static int moxart_mac_open(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
if (!is_valid_ether_addr(ndev->dev_addr))
return -EADDRNOTAVAIL;
napi_enable(&priv->napi);
moxart_mac_reset(ndev);
moxart_update_mac_address(ndev);
moxart_mac_setup_desc_ring(ndev);
moxart_mac_enable(ndev);
netif_start_queue(ndev);
netdev_dbg(ndev, "%s: IMR=0x%x, MACCR=0x%x\n",
__func__, readl(priv->base + REG_INTERRUPT_MASK),
readl(priv->base + REG_MAC_CTRL));
return 0;
}
static int moxart_mac_stop(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
napi_disable(&priv->napi);
netif_stop_queue(ndev);
/* disable all interrupts */
writel(0, priv->base + REG_INTERRUPT_MASK);
/* disable all functions */
writel(0, priv->base + REG_MAC_CTRL);
return 0;
}
static int moxart_rx_poll(struct napi_struct *napi, int budget)
{
struct moxart_mac_priv_t *priv = container_of(napi,
struct moxart_mac_priv_t,
napi);
struct net_device *ndev = priv->ndev;
struct sk_buff *skb;
void *desc;
unsigned int desc0, len;
int rx_head = priv->rx_head;
int rx = 0;
while (rx < budget) {
desc = priv->rx_desc_base + (RX_REG_DESC_SIZE * rx_head);
desc0 = moxart_desc_read(desc + RX_REG_OFFSET_DESC0);
rmb(); /* ensure desc0 is up to date */
if (desc0 & RX_DESC0_DMA_OWN)
break;
if (desc0 & (RX_DESC0_ERR | RX_DESC0_CRC_ERR | RX_DESC0_FTL |
RX_DESC0_RUNT | RX_DESC0_ODD_NB)) {
net_dbg_ratelimited("packet error\n");
ndev->stats.rx_dropped++;
ndev->stats.rx_errors++;
goto rx_next;
}
len = desc0 & RX_DESC0_FRAME_LEN_MASK;
if (len > RX_BUF_SIZE)
len = RX_BUF_SIZE;
dma_sync_single_for_cpu(&ndev->dev,
priv->rx_mapping[rx_head],
priv->rx_buf_size, DMA_FROM_DEVICE);
skb = netdev_alloc_skb_ip_align(ndev, len);
if (unlikely(!skb)) {
net_dbg_ratelimited("netdev_alloc_skb_ip_align failed\n");
ndev->stats.rx_dropped++;
ndev->stats.rx_errors++;
goto rx_next;
}
memcpy(skb->data, priv->rx_buf[rx_head], len);
skb_put(skb, len);
skb->protocol = eth_type_trans(skb, ndev);
napi_gro_receive(&priv->napi, skb);
rx++;
ndev->stats.rx_packets++;
ndev->stats.rx_bytes += len;
if (desc0 & RX_DESC0_MULTICAST)
ndev->stats.multicast++;
rx_next:
wmb(); /* prevent setting ownership back too early */
moxart_desc_write(RX_DESC0_DMA_OWN, desc + RX_REG_OFFSET_DESC0);
rx_head = RX_NEXT(rx_head);
priv->rx_head = rx_head;
}
if (rx < budget)
napi_complete_done(napi, rx);
priv->reg_imr |= RPKT_FINISH_M;
writel(priv->reg_imr, priv->base + REG_INTERRUPT_MASK);
return rx;
}
static int moxart_tx_queue_space(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
return CIRC_SPACE(priv->tx_head, priv->tx_tail, TX_DESC_NUM);
}
static void moxart_tx_finished(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
unsigned int tx_head = priv->tx_head;
unsigned int tx_tail = priv->tx_tail;
while (tx_tail != tx_head) {
dma_unmap_single(&ndev->dev, priv->tx_mapping[tx_tail],
priv->tx_len[tx_tail], DMA_TO_DEVICE);
ndev->stats.tx_packets++;
ndev->stats.tx_bytes += priv->tx_skb[tx_tail]->len;
dev_kfree_skb_irq(priv->tx_skb[tx_tail]);
priv->tx_skb[tx_tail] = NULL;
tx_tail = TX_NEXT(tx_tail);
}
priv->tx_tail = tx_tail;
if (netif_queue_stopped(ndev) &&
moxart_tx_queue_space(ndev) >= TX_WAKE_THRESHOLD)
netif_wake_queue(ndev);
}
static irqreturn_t moxart_mac_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = (struct net_device *)dev_id;
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
unsigned int ists = readl(priv->base + REG_INTERRUPT_STATUS);
if (ists & XPKT_OK_INT_STS)
moxart_tx_finished(ndev);
if (ists & RPKT_FINISH) {
if (napi_schedule_prep(&priv->napi)) {
priv->reg_imr &= ~RPKT_FINISH_M;
writel(priv->reg_imr, priv->base + REG_INTERRUPT_MASK);
__napi_schedule(&priv->napi);
}
}
return IRQ_HANDLED;
}
static int moxart_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
void *desc;
unsigned int len;
unsigned int tx_head;
u32 txdes1;
int ret = NETDEV_TX_BUSY;
spin_lock_irq(&priv->txlock);
tx_head = priv->tx_head;
desc = priv->tx_desc_base + (TX_REG_DESC_SIZE * tx_head);
if (moxart_tx_queue_space(ndev) == 1)
netif_stop_queue(ndev);
if (moxart_desc_read(desc + TX_REG_OFFSET_DESC0) & TX_DESC0_DMA_OWN) {
net_dbg_ratelimited("no TX space for packet\n");
ndev->stats.tx_dropped++;
goto out_unlock;
}
rmb(); /* ensure data is only read that had TX_DESC0_DMA_OWN cleared */
len = skb->len > TX_BUF_SIZE ? TX_BUF_SIZE : skb->len;
priv->tx_mapping[tx_head] = dma_map_single(&ndev->dev, skb->data,
len, DMA_TO_DEVICE);
if (dma_mapping_error(&ndev->dev, priv->tx_mapping[tx_head])) {
netdev_err(ndev, "DMA mapping error\n");
goto out_unlock;
}
priv->tx_len[tx_head] = len;
priv->tx_skb[tx_head] = skb;
moxart_desc_write(priv->tx_mapping[tx_head],
desc + TX_REG_OFFSET_DESC2 + TX_DESC2_ADDRESS_PHYS);
moxart_desc_write((uintptr_t)skb->data,
desc + TX_REG_OFFSET_DESC2 + TX_DESC2_ADDRESS_VIRT);
if (skb->len < ETH_ZLEN) {
memset(&skb->data[skb->len],
0, ETH_ZLEN - skb->len);
len = ETH_ZLEN;
}
dma_sync_single_for_device(&ndev->dev, priv->tx_mapping[tx_head],
priv->tx_buf_size, DMA_TO_DEVICE);
txdes1 = TX_DESC1_LTS | TX_DESC1_FTS | (len & TX_DESC1_BUF_SIZE_MASK);
if (tx_head == TX_DESC_NUM_MASK)
txdes1 |= TX_DESC1_END;
moxart_desc_write(txdes1, desc + TX_REG_OFFSET_DESC1);
wmb(); /* flush descriptor before transferring ownership */
moxart_desc_write(TX_DESC0_DMA_OWN, desc + TX_REG_OFFSET_DESC0);
/* start to send packet */
writel(0xffffffff, priv->base + REG_TX_POLL_DEMAND);
priv->tx_head = TX_NEXT(tx_head);
netif_trans_update(ndev);
ret = NETDEV_TX_OK;
out_unlock:
spin_unlock_irq(&priv->txlock);
return ret;
}
static void moxart_mac_setmulticast(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
struct netdev_hw_addr *ha;
int crc_val;
netdev_for_each_mc_addr(ha, ndev) {
crc_val = crc32_le(~0, ha->addr, ETH_ALEN);
crc_val = (crc_val >> 26) & 0x3f;
if (crc_val >= 32) {
writel(readl(priv->base + REG_MCAST_HASH_TABLE1) |
(1UL << (crc_val - 32)),
priv->base + REG_MCAST_HASH_TABLE1);
} else {
writel(readl(priv->base + REG_MCAST_HASH_TABLE0) |
(1UL << crc_val),
priv->base + REG_MCAST_HASH_TABLE0);
}
}
}
static void moxart_mac_set_rx_mode(struct net_device *ndev)
{
struct moxart_mac_priv_t *priv = netdev_priv(ndev);
spin_lock_irq(&priv->txlock);
(ndev->flags & IFF_PROMISC) ? (priv->reg_maccr |= RCV_ALL) :
(priv->reg_maccr &= ~RCV_ALL);
(ndev->flags & IFF_ALLMULTI) ? (priv->reg_maccr |= RX_MULTIPKT) :
(priv->reg_maccr &= ~RX_MULTIPKT);
if ((ndev->flags & IFF_MULTICAST) && netdev_mc_count(ndev)) {
priv->reg_maccr |= HT_MULTI_EN;
moxart_mac_setmulticast(ndev);
} else {
priv->reg_maccr &= ~HT_MULTI_EN;
}
writel(priv->reg_maccr, priv->base + REG_MAC_CTRL);
spin_unlock_irq(&priv->txlock);
}
static const struct net_device_ops moxart_netdev_ops = {
.ndo_open = moxart_mac_open,
.ndo_stop = moxart_mac_stop,
.ndo_start_xmit = moxart_mac_start_xmit,
.ndo_set_rx_mode = moxart_mac_set_rx_mode,
.ndo_set_mac_address = moxart_set_mac_address,
.ndo_validate_addr = eth_validate_addr,
};
static int moxart_mac_probe(struct platform_device *pdev)
{
struct device *p_dev = &pdev->dev;
struct device_node *node = p_dev->of_node;
struct net_device *ndev;
struct moxart_mac_priv_t *priv;
struct resource *res;
unsigned int irq;
int ret;
ndev = alloc_etherdev(sizeof(struct moxart_mac_priv_t));
if (!ndev)
return -ENOMEM;
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0) {
netdev_err(ndev, "irq_of_parse_and_map failed\n");
ret = -EINVAL;
goto irq_map_fail;
}
priv = netdev_priv(ndev);
priv->ndev = ndev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ndev->base_addr = res->start;
priv->base = devm_ioremap_resource(p_dev, res);
if (IS_ERR(priv->base)) {
dev_err(p_dev, "devm_ioremap_resource failed\n");
ret = PTR_ERR(priv->base);
goto init_fail;
}
spin_lock_init(&priv->txlock);
priv->tx_buf_size = TX_BUF_SIZE;
priv->rx_buf_size = RX_BUF_SIZE;
priv->tx_desc_base = dma_alloc_coherent(NULL, TX_REG_DESC_SIZE *
TX_DESC_NUM, &priv->tx_base,
GFP_DMA | GFP_KERNEL);
if (!priv->tx_desc_base) {
ret = -ENOMEM;
goto init_fail;
}
priv->rx_desc_base = dma_alloc_coherent(NULL, RX_REG_DESC_SIZE *
RX_DESC_NUM, &priv->rx_base,
GFP_DMA | GFP_KERNEL);
if (!priv->rx_desc_base) {
ret = -ENOMEM;
goto init_fail;
}
priv->tx_buf_base = kmalloc_array(priv->tx_buf_size, TX_DESC_NUM,
GFP_ATOMIC);
if (!priv->tx_buf_base) {
ret = -ENOMEM;
goto init_fail;
}
priv->rx_buf_base = kmalloc_array(priv->rx_buf_size, RX_DESC_NUM,
GFP_ATOMIC);
if (!priv->rx_buf_base) {
ret = -ENOMEM;
goto init_fail;
}
platform_set_drvdata(pdev, ndev);
ret = devm_request_irq(p_dev, irq, moxart_mac_interrupt, 0,
pdev->name, ndev);
if (ret) {
netdev_err(ndev, "devm_request_irq failed\n");
goto init_fail;
}
ndev->netdev_ops = &moxart_netdev_ops;
netif_napi_add(ndev, &priv->napi, moxart_rx_poll, RX_DESC_NUM);
ndev->priv_flags |= IFF_UNICAST_FLT;
ndev->irq = irq;
SET_NETDEV_DEV(ndev, &pdev->dev);
ret = register_netdev(ndev);
if (ret) {
free_netdev(ndev);
goto init_fail;
}
netdev_dbg(ndev, "%s: IRQ=%d address=%pM\n",
__func__, ndev->irq, ndev->dev_addr);
return 0;
init_fail:
netdev_err(ndev, "init failed\n");
moxart_mac_free_memory(ndev);
irq_map_fail:
free_netdev(ndev);
return ret;
}
static int moxart_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
unregister_netdev(ndev);
free_irq(ndev->irq, ndev);
moxart_mac_free_memory(ndev);
free_netdev(ndev);
return 0;
}
static const struct of_device_id moxart_mac_match[] = {
{ .compatible = "moxa,moxart-mac" },
{ }
};
MODULE_DEVICE_TABLE(of, moxart_mac_match);
static struct platform_driver moxart_mac_driver = {
.probe = moxart_mac_probe,
.remove = moxart_remove,
.driver = {
.name = "moxart-ethernet",
.of_match_table = moxart_mac_match,
},
};
module_platform_driver(moxart_mac_driver);
MODULE_DESCRIPTION("MOXART RTL8201CP Ethernet driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Jonas Jensen <jonas.jensen@gmail.com>");
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