forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1575 lines
38 KiB
1575 lines
38 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Aeroflex Gaisler GRETH 10/100/1G Ethernet MAC. |
|
* |
|
* 2005-2010 (c) Aeroflex Gaisler AB |
|
* |
|
* This driver supports GRETH 10/100 and GRETH 10/100/1G Ethernet MACs |
|
* available in the GRLIB VHDL IP core library. |
|
* |
|
* Full documentation of both cores can be found here: |
|
* https://www.gaisler.com/products/grlib/grip.pdf |
|
* |
|
* The Gigabit version supports scatter/gather DMA, any alignment of |
|
* buffers and checksum offloading. |
|
* |
|
* Contributors: Kristoffer Glembo |
|
* Daniel Hellstrom |
|
* Marko Isomaki |
|
*/ |
|
|
|
#include <linux/dma-mapping.h> |
|
#include <linux/module.h> |
|
#include <linux/uaccess.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/netdevice.h> |
|
#include <linux/etherdevice.h> |
|
#include <linux/ethtool.h> |
|
#include <linux/skbuff.h> |
|
#include <linux/io.h> |
|
#include <linux/crc32.h> |
|
#include <linux/mii.h> |
|
#include <linux/of_device.h> |
|
#include <linux/of_net.h> |
|
#include <linux/of_platform.h> |
|
#include <linux/slab.h> |
|
#include <asm/cacheflush.h> |
|
#include <asm/byteorder.h> |
|
|
|
#ifdef CONFIG_SPARC |
|
#include <asm/idprom.h> |
|
#endif |
|
|
|
#include "greth.h" |
|
|
|
#define GRETH_DEF_MSG_ENABLE \ |
|
(NETIF_MSG_DRV | \ |
|
NETIF_MSG_PROBE | \ |
|
NETIF_MSG_LINK | \ |
|
NETIF_MSG_IFDOWN | \ |
|
NETIF_MSG_IFUP | \ |
|
NETIF_MSG_RX_ERR | \ |
|
NETIF_MSG_TX_ERR) |
|
|
|
static int greth_debug = -1; /* -1 == use GRETH_DEF_MSG_ENABLE as value */ |
|
module_param(greth_debug, int, 0); |
|
MODULE_PARM_DESC(greth_debug, "GRETH bitmapped debugging message enable value"); |
|
|
|
/* Accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */ |
|
static int macaddr[6]; |
|
module_param_array(macaddr, int, NULL, 0); |
|
MODULE_PARM_DESC(macaddr, "GRETH Ethernet MAC address"); |
|
|
|
static int greth_edcl = 1; |
|
module_param(greth_edcl, int, 0); |
|
MODULE_PARM_DESC(greth_edcl, "GRETH EDCL usage indicator. Set to 1 if EDCL is used."); |
|
|
|
static int greth_open(struct net_device *dev); |
|
static netdev_tx_t greth_start_xmit(struct sk_buff *skb, |
|
struct net_device *dev); |
|
static netdev_tx_t greth_start_xmit_gbit(struct sk_buff *skb, |
|
struct net_device *dev); |
|
static int greth_rx(struct net_device *dev, int limit); |
|
static int greth_rx_gbit(struct net_device *dev, int limit); |
|
static void greth_clean_tx(struct net_device *dev); |
|
static void greth_clean_tx_gbit(struct net_device *dev); |
|
static irqreturn_t greth_interrupt(int irq, void *dev_id); |
|
static int greth_close(struct net_device *dev); |
|
static int greth_set_mac_add(struct net_device *dev, void *p); |
|
static void greth_set_multicast_list(struct net_device *dev); |
|
|
|
#define GRETH_REGLOAD(a) (be32_to_cpu(__raw_readl(&(a)))) |
|
#define GRETH_REGSAVE(a, v) (__raw_writel(cpu_to_be32(v), &(a))) |
|
#define GRETH_REGORIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) | (v)))) |
|
#define GRETH_REGANDIN(a, v) (GRETH_REGSAVE(a, (GRETH_REGLOAD(a) & (v)))) |
|
|
|
#define NEXT_TX(N) (((N) + 1) & GRETH_TXBD_NUM_MASK) |
|
#define SKIP_TX(N, C) (((N) + C) & GRETH_TXBD_NUM_MASK) |
|
#define NEXT_RX(N) (((N) + 1) & GRETH_RXBD_NUM_MASK) |
|
|
|
static void greth_print_rx_packet(void *addr, int len) |
|
{ |
|
print_hex_dump(KERN_DEBUG, "RX: ", DUMP_PREFIX_OFFSET, 16, 1, |
|
addr, len, true); |
|
} |
|
|
|
static void greth_print_tx_packet(struct sk_buff *skb) |
|
{ |
|
int i; |
|
int length; |
|
|
|
if (skb_shinfo(skb)->nr_frags == 0) |
|
length = skb->len; |
|
else |
|
length = skb_headlen(skb); |
|
|
|
print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, |
|
skb->data, length, true); |
|
|
|
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
|
|
|
print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1, |
|
skb_frag_address(&skb_shinfo(skb)->frags[i]), |
|
skb_frag_size(&skb_shinfo(skb)->frags[i]), true); |
|
} |
|
} |
|
|
|
static inline void greth_enable_tx(struct greth_private *greth) |
|
{ |
|
wmb(); |
|
GRETH_REGORIN(greth->regs->control, GRETH_TXEN); |
|
} |
|
|
|
static inline void greth_enable_tx_and_irq(struct greth_private *greth) |
|
{ |
|
wmb(); /* BDs must been written to memory before enabling TX */ |
|
GRETH_REGORIN(greth->regs->control, GRETH_TXEN | GRETH_TXI); |
|
} |
|
|
|
static inline void greth_disable_tx(struct greth_private *greth) |
|
{ |
|
GRETH_REGANDIN(greth->regs->control, ~GRETH_TXEN); |
|
} |
|
|
|
static inline void greth_enable_rx(struct greth_private *greth) |
|
{ |
|
wmb(); |
|
GRETH_REGORIN(greth->regs->control, GRETH_RXEN); |
|
} |
|
|
|
static inline void greth_disable_rx(struct greth_private *greth) |
|
{ |
|
GRETH_REGANDIN(greth->regs->control, ~GRETH_RXEN); |
|
} |
|
|
|
static inline void greth_enable_irqs(struct greth_private *greth) |
|
{ |
|
GRETH_REGORIN(greth->regs->control, GRETH_RXI | GRETH_TXI); |
|
} |
|
|
|
static inline void greth_disable_irqs(struct greth_private *greth) |
|
{ |
|
GRETH_REGANDIN(greth->regs->control, ~(GRETH_RXI|GRETH_TXI)); |
|
} |
|
|
|
static inline void greth_write_bd(u32 *bd, u32 val) |
|
{ |
|
__raw_writel(cpu_to_be32(val), bd); |
|
} |
|
|
|
static inline u32 greth_read_bd(u32 *bd) |
|
{ |
|
return be32_to_cpu(__raw_readl(bd)); |
|
} |
|
|
|
static void greth_clean_rings(struct greth_private *greth) |
|
{ |
|
int i; |
|
struct greth_bd *rx_bdp = greth->rx_bd_base; |
|
struct greth_bd *tx_bdp = greth->tx_bd_base; |
|
|
|
if (greth->gbit_mac) { |
|
|
|
/* Free and unmap RX buffers */ |
|
for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { |
|
if (greth->rx_skbuff[i] != NULL) { |
|
dev_kfree_skb(greth->rx_skbuff[i]); |
|
dma_unmap_single(greth->dev, |
|
greth_read_bd(&rx_bdp->addr), |
|
MAX_FRAME_SIZE+NET_IP_ALIGN, |
|
DMA_FROM_DEVICE); |
|
} |
|
} |
|
|
|
/* TX buffers */ |
|
while (greth->tx_free < GRETH_TXBD_NUM) { |
|
|
|
struct sk_buff *skb = greth->tx_skbuff[greth->tx_last]; |
|
int nr_frags = skb_shinfo(skb)->nr_frags; |
|
tx_bdp = greth->tx_bd_base + greth->tx_last; |
|
greth->tx_last = NEXT_TX(greth->tx_last); |
|
|
|
dma_unmap_single(greth->dev, |
|
greth_read_bd(&tx_bdp->addr), |
|
skb_headlen(skb), |
|
DMA_TO_DEVICE); |
|
|
|
for (i = 0; i < nr_frags; i++) { |
|
skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
|
tx_bdp = greth->tx_bd_base + greth->tx_last; |
|
|
|
dma_unmap_page(greth->dev, |
|
greth_read_bd(&tx_bdp->addr), |
|
skb_frag_size(frag), |
|
DMA_TO_DEVICE); |
|
|
|
greth->tx_last = NEXT_TX(greth->tx_last); |
|
} |
|
greth->tx_free += nr_frags+1; |
|
dev_kfree_skb(skb); |
|
} |
|
|
|
|
|
} else { /* 10/100 Mbps MAC */ |
|
|
|
for (i = 0; i < GRETH_RXBD_NUM; i++, rx_bdp++) { |
|
kfree(greth->rx_bufs[i]); |
|
dma_unmap_single(greth->dev, |
|
greth_read_bd(&rx_bdp->addr), |
|
MAX_FRAME_SIZE, |
|
DMA_FROM_DEVICE); |
|
} |
|
for (i = 0; i < GRETH_TXBD_NUM; i++, tx_bdp++) { |
|
kfree(greth->tx_bufs[i]); |
|
dma_unmap_single(greth->dev, |
|
greth_read_bd(&tx_bdp->addr), |
|
MAX_FRAME_SIZE, |
|
DMA_TO_DEVICE); |
|
} |
|
} |
|
} |
|
|
|
static int greth_init_rings(struct greth_private *greth) |
|
{ |
|
struct sk_buff *skb; |
|
struct greth_bd *rx_bd, *tx_bd; |
|
u32 dma_addr; |
|
int i; |
|
|
|
rx_bd = greth->rx_bd_base; |
|
tx_bd = greth->tx_bd_base; |
|
|
|
/* Initialize descriptor rings and buffers */ |
|
if (greth->gbit_mac) { |
|
|
|
for (i = 0; i < GRETH_RXBD_NUM; i++) { |
|
skb = netdev_alloc_skb(greth->netdev, MAX_FRAME_SIZE+NET_IP_ALIGN); |
|
if (skb == NULL) { |
|
if (netif_msg_ifup(greth)) |
|
dev_err(greth->dev, "Error allocating DMA ring.\n"); |
|
goto cleanup; |
|
} |
|
skb_reserve(skb, NET_IP_ALIGN); |
|
dma_addr = dma_map_single(greth->dev, |
|
skb->data, |
|
MAX_FRAME_SIZE+NET_IP_ALIGN, |
|
DMA_FROM_DEVICE); |
|
|
|
if (dma_mapping_error(greth->dev, dma_addr)) { |
|
if (netif_msg_ifup(greth)) |
|
dev_err(greth->dev, "Could not create initial DMA mapping\n"); |
|
goto cleanup; |
|
} |
|
greth->rx_skbuff[i] = skb; |
|
greth_write_bd(&rx_bd[i].addr, dma_addr); |
|
greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); |
|
} |
|
|
|
} else { |
|
|
|
/* 10/100 MAC uses a fixed set of buffers and copy to/from SKBs */ |
|
for (i = 0; i < GRETH_RXBD_NUM; i++) { |
|
|
|
greth->rx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); |
|
|
|
if (greth->rx_bufs[i] == NULL) { |
|
if (netif_msg_ifup(greth)) |
|
dev_err(greth->dev, "Error allocating DMA ring.\n"); |
|
goto cleanup; |
|
} |
|
|
|
dma_addr = dma_map_single(greth->dev, |
|
greth->rx_bufs[i], |
|
MAX_FRAME_SIZE, |
|
DMA_FROM_DEVICE); |
|
|
|
if (dma_mapping_error(greth->dev, dma_addr)) { |
|
if (netif_msg_ifup(greth)) |
|
dev_err(greth->dev, "Could not create initial DMA mapping\n"); |
|
goto cleanup; |
|
} |
|
greth_write_bd(&rx_bd[i].addr, dma_addr); |
|
greth_write_bd(&rx_bd[i].stat, GRETH_BD_EN | GRETH_BD_IE); |
|
} |
|
for (i = 0; i < GRETH_TXBD_NUM; i++) { |
|
|
|
greth->tx_bufs[i] = kmalloc(MAX_FRAME_SIZE, GFP_KERNEL); |
|
|
|
if (greth->tx_bufs[i] == NULL) { |
|
if (netif_msg_ifup(greth)) |
|
dev_err(greth->dev, "Error allocating DMA ring.\n"); |
|
goto cleanup; |
|
} |
|
|
|
dma_addr = dma_map_single(greth->dev, |
|
greth->tx_bufs[i], |
|
MAX_FRAME_SIZE, |
|
DMA_TO_DEVICE); |
|
|
|
if (dma_mapping_error(greth->dev, dma_addr)) { |
|
if (netif_msg_ifup(greth)) |
|
dev_err(greth->dev, "Could not create initial DMA mapping\n"); |
|
goto cleanup; |
|
} |
|
greth_write_bd(&tx_bd[i].addr, dma_addr); |
|
greth_write_bd(&tx_bd[i].stat, 0); |
|
} |
|
} |
|
greth_write_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat, |
|
greth_read_bd(&rx_bd[GRETH_RXBD_NUM - 1].stat) | GRETH_BD_WR); |
|
|
|
/* Initialize pointers. */ |
|
greth->rx_cur = 0; |
|
greth->tx_next = 0; |
|
greth->tx_last = 0; |
|
greth->tx_free = GRETH_TXBD_NUM; |
|
|
|
/* Initialize descriptor base address */ |
|
GRETH_REGSAVE(greth->regs->tx_desc_p, greth->tx_bd_base_phys); |
|
GRETH_REGSAVE(greth->regs->rx_desc_p, greth->rx_bd_base_phys); |
|
|
|
return 0; |
|
|
|
cleanup: |
|
greth_clean_rings(greth); |
|
return -ENOMEM; |
|
} |
|
|
|
static int greth_open(struct net_device *dev) |
|
{ |
|
struct greth_private *greth = netdev_priv(dev); |
|
int err; |
|
|
|
err = greth_init_rings(greth); |
|
if (err) { |
|
if (netif_msg_ifup(greth)) |
|
dev_err(&dev->dev, "Could not allocate memory for DMA rings\n"); |
|
return err; |
|
} |
|
|
|
err = request_irq(greth->irq, greth_interrupt, 0, "eth", (void *) dev); |
|
if (err) { |
|
if (netif_msg_ifup(greth)) |
|
dev_err(&dev->dev, "Could not allocate interrupt %d\n", dev->irq); |
|
greth_clean_rings(greth); |
|
return err; |
|
} |
|
|
|
if (netif_msg_ifup(greth)) |
|
dev_dbg(&dev->dev, " starting queue\n"); |
|
netif_start_queue(dev); |
|
|
|
GRETH_REGSAVE(greth->regs->status, 0xFF); |
|
|
|
napi_enable(&greth->napi); |
|
|
|
greth_enable_irqs(greth); |
|
greth_enable_tx(greth); |
|
greth_enable_rx(greth); |
|
return 0; |
|
|
|
} |
|
|
|
static int greth_close(struct net_device *dev) |
|
{ |
|
struct greth_private *greth = netdev_priv(dev); |
|
|
|
napi_disable(&greth->napi); |
|
|
|
greth_disable_irqs(greth); |
|
greth_disable_tx(greth); |
|
greth_disable_rx(greth); |
|
|
|
netif_stop_queue(dev); |
|
|
|
free_irq(greth->irq, (void *) dev); |
|
|
|
greth_clean_rings(greth); |
|
|
|
return 0; |
|
} |
|
|
|
static netdev_tx_t |
|
greth_start_xmit(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
struct greth_private *greth = netdev_priv(dev); |
|
struct greth_bd *bdp; |
|
int err = NETDEV_TX_OK; |
|
u32 status, dma_addr, ctrl; |
|
unsigned long flags; |
|
|
|
/* Clean TX Ring */ |
|
greth_clean_tx(greth->netdev); |
|
|
|
if (unlikely(greth->tx_free <= 0)) { |
|
spin_lock_irqsave(&greth->devlock, flags);/*save from poll/irq*/ |
|
ctrl = GRETH_REGLOAD(greth->regs->control); |
|
/* Enable TX IRQ only if not already in poll() routine */ |
|
if (ctrl & GRETH_RXI) |
|
GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI); |
|
netif_stop_queue(dev); |
|
spin_unlock_irqrestore(&greth->devlock, flags); |
|
return NETDEV_TX_BUSY; |
|
} |
|
|
|
if (netif_msg_pktdata(greth)) |
|
greth_print_tx_packet(skb); |
|
|
|
|
|
if (unlikely(skb->len > MAX_FRAME_SIZE)) { |
|
dev->stats.tx_errors++; |
|
goto out; |
|
} |
|
|
|
bdp = greth->tx_bd_base + greth->tx_next; |
|
dma_addr = greth_read_bd(&bdp->addr); |
|
|
|
memcpy((unsigned char *) phys_to_virt(dma_addr), skb->data, skb->len); |
|
|
|
dma_sync_single_for_device(greth->dev, dma_addr, skb->len, DMA_TO_DEVICE); |
|
|
|
status = GRETH_BD_EN | GRETH_BD_IE | (skb->len & GRETH_BD_LEN); |
|
greth->tx_bufs_length[greth->tx_next] = skb->len & GRETH_BD_LEN; |
|
|
|
/* Wrap around descriptor ring */ |
|
if (greth->tx_next == GRETH_TXBD_NUM_MASK) { |
|
status |= GRETH_BD_WR; |
|
} |
|
|
|
greth->tx_next = NEXT_TX(greth->tx_next); |
|
greth->tx_free--; |
|
|
|
/* Write descriptor control word and enable transmission */ |
|
greth_write_bd(&bdp->stat, status); |
|
spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/ |
|
greth_enable_tx(greth); |
|
spin_unlock_irqrestore(&greth->devlock, flags); |
|
|
|
out: |
|
dev_kfree_skb(skb); |
|
return err; |
|
} |
|
|
|
static inline u16 greth_num_free_bds(u16 tx_last, u16 tx_next) |
|
{ |
|
if (tx_next < tx_last) |
|
return (tx_last - tx_next) - 1; |
|
else |
|
return GRETH_TXBD_NUM - (tx_next - tx_last) - 1; |
|
} |
|
|
|
static netdev_tx_t |
|
greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
struct greth_private *greth = netdev_priv(dev); |
|
struct greth_bd *bdp; |
|
u32 status, dma_addr; |
|
int curr_tx, nr_frags, i, err = NETDEV_TX_OK; |
|
unsigned long flags; |
|
u16 tx_last; |
|
|
|
nr_frags = skb_shinfo(skb)->nr_frags; |
|
tx_last = greth->tx_last; |
|
rmb(); /* tx_last is updated by the poll task */ |
|
|
|
if (greth_num_free_bds(tx_last, greth->tx_next) < nr_frags + 1) { |
|
netif_stop_queue(dev); |
|
err = NETDEV_TX_BUSY; |
|
goto out; |
|
} |
|
|
|
if (netif_msg_pktdata(greth)) |
|
greth_print_tx_packet(skb); |
|
|
|
if (unlikely(skb->len > MAX_FRAME_SIZE)) { |
|
dev->stats.tx_errors++; |
|
goto out; |
|
} |
|
|
|
/* Save skb pointer. */ |
|
greth->tx_skbuff[greth->tx_next] = skb; |
|
|
|
/* Linear buf */ |
|
if (nr_frags != 0) |
|
status = GRETH_TXBD_MORE; |
|
else |
|
status = GRETH_BD_IE; |
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) |
|
status |= GRETH_TXBD_CSALL; |
|
status |= skb_headlen(skb) & GRETH_BD_LEN; |
|
if (greth->tx_next == GRETH_TXBD_NUM_MASK) |
|
status |= GRETH_BD_WR; |
|
|
|
|
|
bdp = greth->tx_bd_base + greth->tx_next; |
|
greth_write_bd(&bdp->stat, status); |
|
dma_addr = dma_map_single(greth->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); |
|
|
|
if (unlikely(dma_mapping_error(greth->dev, dma_addr))) |
|
goto map_error; |
|
|
|
greth_write_bd(&bdp->addr, dma_addr); |
|
|
|
curr_tx = NEXT_TX(greth->tx_next); |
|
|
|
/* Frags */ |
|
for (i = 0; i < nr_frags; i++) { |
|
skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
|
greth->tx_skbuff[curr_tx] = NULL; |
|
bdp = greth->tx_bd_base + curr_tx; |
|
|
|
status = GRETH_BD_EN; |
|
if (skb->ip_summed == CHECKSUM_PARTIAL) |
|
status |= GRETH_TXBD_CSALL; |
|
status |= skb_frag_size(frag) & GRETH_BD_LEN; |
|
|
|
/* Wrap around descriptor ring */ |
|
if (curr_tx == GRETH_TXBD_NUM_MASK) |
|
status |= GRETH_BD_WR; |
|
|
|
/* More fragments left */ |
|
if (i < nr_frags - 1) |
|
status |= GRETH_TXBD_MORE; |
|
else |
|
status |= GRETH_BD_IE; /* enable IRQ on last fragment */ |
|
|
|
greth_write_bd(&bdp->stat, status); |
|
|
|
dma_addr = skb_frag_dma_map(greth->dev, frag, 0, skb_frag_size(frag), |
|
DMA_TO_DEVICE); |
|
|
|
if (unlikely(dma_mapping_error(greth->dev, dma_addr))) |
|
goto frag_map_error; |
|
|
|
greth_write_bd(&bdp->addr, dma_addr); |
|
|
|
curr_tx = NEXT_TX(curr_tx); |
|
} |
|
|
|
wmb(); |
|
|
|
/* Enable the descriptor chain by enabling the first descriptor */ |
|
bdp = greth->tx_bd_base + greth->tx_next; |
|
greth_write_bd(&bdp->stat, |
|
greth_read_bd(&bdp->stat) | GRETH_BD_EN); |
|
|
|
spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/ |
|
greth->tx_next = curr_tx; |
|
greth_enable_tx_and_irq(greth); |
|
spin_unlock_irqrestore(&greth->devlock, flags); |
|
|
|
return NETDEV_TX_OK; |
|
|
|
frag_map_error: |
|
/* Unmap SKB mappings that succeeded and disable descriptor */ |
|
for (i = 0; greth->tx_next + i != curr_tx; i++) { |
|
bdp = greth->tx_bd_base + greth->tx_next + i; |
|
dma_unmap_single(greth->dev, |
|
greth_read_bd(&bdp->addr), |
|
greth_read_bd(&bdp->stat) & GRETH_BD_LEN, |
|
DMA_TO_DEVICE); |
|
greth_write_bd(&bdp->stat, 0); |
|
} |
|
map_error: |
|
if (net_ratelimit()) |
|
dev_warn(greth->dev, "Could not create TX DMA mapping\n"); |
|
dev_kfree_skb(skb); |
|
out: |
|
return err; |
|
} |
|
|
|
static irqreturn_t greth_interrupt(int irq, void *dev_id) |
|
{ |
|
struct net_device *dev = dev_id; |
|
struct greth_private *greth; |
|
u32 status, ctrl; |
|
irqreturn_t retval = IRQ_NONE; |
|
|
|
greth = netdev_priv(dev); |
|
|
|
spin_lock(&greth->devlock); |
|
|
|
/* Get the interrupt events that caused us to be here. */ |
|
status = GRETH_REGLOAD(greth->regs->status); |
|
|
|
/* Must see if interrupts are enabled also, INT_TX|INT_RX flags may be |
|
* set regardless of whether IRQ is enabled or not. Especially |
|
* important when shared IRQ. |
|
*/ |
|
ctrl = GRETH_REGLOAD(greth->regs->control); |
|
|
|
/* Handle rx and tx interrupts through poll */ |
|
if (((status & (GRETH_INT_RE | GRETH_INT_RX)) && (ctrl & GRETH_RXI)) || |
|
((status & (GRETH_INT_TE | GRETH_INT_TX)) && (ctrl & GRETH_TXI))) { |
|
retval = IRQ_HANDLED; |
|
|
|
/* Disable interrupts and schedule poll() */ |
|
greth_disable_irqs(greth); |
|
napi_schedule(&greth->napi); |
|
} |
|
|
|
spin_unlock(&greth->devlock); |
|
|
|
return retval; |
|
} |
|
|
|
static void greth_clean_tx(struct net_device *dev) |
|
{ |
|
struct greth_private *greth; |
|
struct greth_bd *bdp; |
|
u32 stat; |
|
|
|
greth = netdev_priv(dev); |
|
|
|
while (1) { |
|
bdp = greth->tx_bd_base + greth->tx_last; |
|
GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX); |
|
mb(); |
|
stat = greth_read_bd(&bdp->stat); |
|
|
|
if (unlikely(stat & GRETH_BD_EN)) |
|
break; |
|
|
|
if (greth->tx_free == GRETH_TXBD_NUM) |
|
break; |
|
|
|
/* Check status for errors */ |
|
if (unlikely(stat & GRETH_TXBD_STATUS)) { |
|
dev->stats.tx_errors++; |
|
if (stat & GRETH_TXBD_ERR_AL) |
|
dev->stats.tx_aborted_errors++; |
|
if (stat & GRETH_TXBD_ERR_UE) |
|
dev->stats.tx_fifo_errors++; |
|
} |
|
dev->stats.tx_packets++; |
|
dev->stats.tx_bytes += greth->tx_bufs_length[greth->tx_last]; |
|
greth->tx_last = NEXT_TX(greth->tx_last); |
|
greth->tx_free++; |
|
} |
|
|
|
if (greth->tx_free > 0) { |
|
netif_wake_queue(dev); |
|
} |
|
} |
|
|
|
static inline void greth_update_tx_stats(struct net_device *dev, u32 stat) |
|
{ |
|
/* Check status for errors */ |
|
if (unlikely(stat & GRETH_TXBD_STATUS)) { |
|
dev->stats.tx_errors++; |
|
if (stat & GRETH_TXBD_ERR_AL) |
|
dev->stats.tx_aborted_errors++; |
|
if (stat & GRETH_TXBD_ERR_UE) |
|
dev->stats.tx_fifo_errors++; |
|
if (stat & GRETH_TXBD_ERR_LC) |
|
dev->stats.tx_aborted_errors++; |
|
} |
|
dev->stats.tx_packets++; |
|
} |
|
|
|
static void greth_clean_tx_gbit(struct net_device *dev) |
|
{ |
|
struct greth_private *greth; |
|
struct greth_bd *bdp, *bdp_last_frag; |
|
struct sk_buff *skb = NULL; |
|
u32 stat; |
|
int nr_frags, i; |
|
u16 tx_last; |
|
|
|
greth = netdev_priv(dev); |
|
tx_last = greth->tx_last; |
|
|
|
while (tx_last != greth->tx_next) { |
|
|
|
skb = greth->tx_skbuff[tx_last]; |
|
|
|
nr_frags = skb_shinfo(skb)->nr_frags; |
|
|
|
/* We only clean fully completed SKBs */ |
|
bdp_last_frag = greth->tx_bd_base + SKIP_TX(tx_last, nr_frags); |
|
|
|
GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX); |
|
mb(); |
|
stat = greth_read_bd(&bdp_last_frag->stat); |
|
|
|
if (stat & GRETH_BD_EN) |
|
break; |
|
|
|
greth->tx_skbuff[tx_last] = NULL; |
|
|
|
greth_update_tx_stats(dev, stat); |
|
dev->stats.tx_bytes += skb->len; |
|
|
|
bdp = greth->tx_bd_base + tx_last; |
|
|
|
tx_last = NEXT_TX(tx_last); |
|
|
|
dma_unmap_single(greth->dev, |
|
greth_read_bd(&bdp->addr), |
|
skb_headlen(skb), |
|
DMA_TO_DEVICE); |
|
|
|
for (i = 0; i < nr_frags; i++) { |
|
skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
|
bdp = greth->tx_bd_base + tx_last; |
|
|
|
dma_unmap_page(greth->dev, |
|
greth_read_bd(&bdp->addr), |
|
skb_frag_size(frag), |
|
DMA_TO_DEVICE); |
|
|
|
tx_last = NEXT_TX(tx_last); |
|
} |
|
dev_kfree_skb(skb); |
|
} |
|
if (skb) { /* skb is set only if the above while loop was entered */ |
|
wmb(); |
|
greth->tx_last = tx_last; |
|
|
|
if (netif_queue_stopped(dev) && |
|
(greth_num_free_bds(tx_last, greth->tx_next) > |
|
(MAX_SKB_FRAGS+1))) |
|
netif_wake_queue(dev); |
|
} |
|
} |
|
|
|
static int greth_rx(struct net_device *dev, int limit) |
|
{ |
|
struct greth_private *greth; |
|
struct greth_bd *bdp; |
|
struct sk_buff *skb; |
|
int pkt_len; |
|
int bad, count; |
|
u32 status, dma_addr; |
|
unsigned long flags; |
|
|
|
greth = netdev_priv(dev); |
|
|
|
for (count = 0; count < limit; ++count) { |
|
|
|
bdp = greth->rx_bd_base + greth->rx_cur; |
|
GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX); |
|
mb(); |
|
status = greth_read_bd(&bdp->stat); |
|
|
|
if (unlikely(status & GRETH_BD_EN)) { |
|
break; |
|
} |
|
|
|
dma_addr = greth_read_bd(&bdp->addr); |
|
bad = 0; |
|
|
|
/* Check status for errors. */ |
|
if (unlikely(status & GRETH_RXBD_STATUS)) { |
|
if (status & GRETH_RXBD_ERR_FT) { |
|
dev->stats.rx_length_errors++; |
|
bad = 1; |
|
} |
|
if (status & (GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE)) { |
|
dev->stats.rx_frame_errors++; |
|
bad = 1; |
|
} |
|
if (status & GRETH_RXBD_ERR_CRC) { |
|
dev->stats.rx_crc_errors++; |
|
bad = 1; |
|
} |
|
} |
|
if (unlikely(bad)) { |
|
dev->stats.rx_errors++; |
|
|
|
} else { |
|
|
|
pkt_len = status & GRETH_BD_LEN; |
|
|
|
skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN); |
|
|
|
if (unlikely(skb == NULL)) { |
|
|
|
if (net_ratelimit()) |
|
dev_warn(&dev->dev, "low on memory - " "packet dropped\n"); |
|
|
|
dev->stats.rx_dropped++; |
|
|
|
} else { |
|
skb_reserve(skb, NET_IP_ALIGN); |
|
|
|
dma_sync_single_for_cpu(greth->dev, |
|
dma_addr, |
|
pkt_len, |
|
DMA_FROM_DEVICE); |
|
|
|
if (netif_msg_pktdata(greth)) |
|
greth_print_rx_packet(phys_to_virt(dma_addr), pkt_len); |
|
|
|
skb_put_data(skb, phys_to_virt(dma_addr), |
|
pkt_len); |
|
|
|
skb->protocol = eth_type_trans(skb, dev); |
|
dev->stats.rx_bytes += pkt_len; |
|
dev->stats.rx_packets++; |
|
netif_receive_skb(skb); |
|
} |
|
} |
|
|
|
status = GRETH_BD_EN | GRETH_BD_IE; |
|
if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { |
|
status |= GRETH_BD_WR; |
|
} |
|
|
|
wmb(); |
|
greth_write_bd(&bdp->stat, status); |
|
|
|
dma_sync_single_for_device(greth->dev, dma_addr, MAX_FRAME_SIZE, DMA_FROM_DEVICE); |
|
|
|
spin_lock_irqsave(&greth->devlock, flags); /* save from XMIT */ |
|
greth_enable_rx(greth); |
|
spin_unlock_irqrestore(&greth->devlock, flags); |
|
|
|
greth->rx_cur = NEXT_RX(greth->rx_cur); |
|
} |
|
|
|
return count; |
|
} |
|
|
|
static inline int hw_checksummed(u32 status) |
|
{ |
|
|
|
if (status & GRETH_RXBD_IP_FRAG) |
|
return 0; |
|
|
|
if (status & GRETH_RXBD_IP && status & GRETH_RXBD_IP_CSERR) |
|
return 0; |
|
|
|
if (status & GRETH_RXBD_UDP && status & GRETH_RXBD_UDP_CSERR) |
|
return 0; |
|
|
|
if (status & GRETH_RXBD_TCP && status & GRETH_RXBD_TCP_CSERR) |
|
return 0; |
|
|
|
return 1; |
|
} |
|
|
|
static int greth_rx_gbit(struct net_device *dev, int limit) |
|
{ |
|
struct greth_private *greth; |
|
struct greth_bd *bdp; |
|
struct sk_buff *skb, *newskb; |
|
int pkt_len; |
|
int bad, count = 0; |
|
u32 status, dma_addr; |
|
unsigned long flags; |
|
|
|
greth = netdev_priv(dev); |
|
|
|
for (count = 0; count < limit; ++count) { |
|
|
|
bdp = greth->rx_bd_base + greth->rx_cur; |
|
skb = greth->rx_skbuff[greth->rx_cur]; |
|
GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX); |
|
mb(); |
|
status = greth_read_bd(&bdp->stat); |
|
bad = 0; |
|
|
|
if (status & GRETH_BD_EN) |
|
break; |
|
|
|
/* Check status for errors. */ |
|
if (unlikely(status & GRETH_RXBD_STATUS)) { |
|
|
|
if (status & GRETH_RXBD_ERR_FT) { |
|
dev->stats.rx_length_errors++; |
|
bad = 1; |
|
} else if (status & |
|
(GRETH_RXBD_ERR_AE | GRETH_RXBD_ERR_OE | GRETH_RXBD_ERR_LE)) { |
|
dev->stats.rx_frame_errors++; |
|
bad = 1; |
|
} else if (status & GRETH_RXBD_ERR_CRC) { |
|
dev->stats.rx_crc_errors++; |
|
bad = 1; |
|
} |
|
} |
|
|
|
/* Allocate new skb to replace current, not needed if the |
|
* current skb can be reused */ |
|
if (!bad && (newskb=netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN))) { |
|
skb_reserve(newskb, NET_IP_ALIGN); |
|
|
|
dma_addr = dma_map_single(greth->dev, |
|
newskb->data, |
|
MAX_FRAME_SIZE + NET_IP_ALIGN, |
|
DMA_FROM_DEVICE); |
|
|
|
if (!dma_mapping_error(greth->dev, dma_addr)) { |
|
/* Process the incoming frame. */ |
|
pkt_len = status & GRETH_BD_LEN; |
|
|
|
dma_unmap_single(greth->dev, |
|
greth_read_bd(&bdp->addr), |
|
MAX_FRAME_SIZE + NET_IP_ALIGN, |
|
DMA_FROM_DEVICE); |
|
|
|
if (netif_msg_pktdata(greth)) |
|
greth_print_rx_packet(phys_to_virt(greth_read_bd(&bdp->addr)), pkt_len); |
|
|
|
skb_put(skb, pkt_len); |
|
|
|
if (dev->features & NETIF_F_RXCSUM && hw_checksummed(status)) |
|
skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
else |
|
skb_checksum_none_assert(skb); |
|
|
|
skb->protocol = eth_type_trans(skb, dev); |
|
dev->stats.rx_packets++; |
|
dev->stats.rx_bytes += pkt_len; |
|
netif_receive_skb(skb); |
|
|
|
greth->rx_skbuff[greth->rx_cur] = newskb; |
|
greth_write_bd(&bdp->addr, dma_addr); |
|
} else { |
|
if (net_ratelimit()) |
|
dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n"); |
|
dev_kfree_skb(newskb); |
|
/* reusing current skb, so it is a drop */ |
|
dev->stats.rx_dropped++; |
|
} |
|
} else if (bad) { |
|
/* Bad Frame transfer, the skb is reused */ |
|
dev->stats.rx_dropped++; |
|
} else { |
|
/* Failed Allocating a new skb. This is rather stupid |
|
* but the current "filled" skb is reused, as if |
|
* transfer failure. One could argue that RX descriptor |
|
* table handling should be divided into cleaning and |
|
* filling as the TX part of the driver |
|
*/ |
|
if (net_ratelimit()) |
|
dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n"); |
|
/* reusing current skb, so it is a drop */ |
|
dev->stats.rx_dropped++; |
|
} |
|
|
|
status = GRETH_BD_EN | GRETH_BD_IE; |
|
if (greth->rx_cur == GRETH_RXBD_NUM_MASK) { |
|
status |= GRETH_BD_WR; |
|
} |
|
|
|
wmb(); |
|
greth_write_bd(&bdp->stat, status); |
|
spin_lock_irqsave(&greth->devlock, flags); |
|
greth_enable_rx(greth); |
|
spin_unlock_irqrestore(&greth->devlock, flags); |
|
greth->rx_cur = NEXT_RX(greth->rx_cur); |
|
} |
|
|
|
return count; |
|
|
|
} |
|
|
|
static int greth_poll(struct napi_struct *napi, int budget) |
|
{ |
|
struct greth_private *greth; |
|
int work_done = 0; |
|
unsigned long flags; |
|
u32 mask, ctrl; |
|
greth = container_of(napi, struct greth_private, napi); |
|
|
|
restart_txrx_poll: |
|
if (greth->gbit_mac) { |
|
greth_clean_tx_gbit(greth->netdev); |
|
work_done += greth_rx_gbit(greth->netdev, budget - work_done); |
|
} else { |
|
if (netif_queue_stopped(greth->netdev)) |
|
greth_clean_tx(greth->netdev); |
|
work_done += greth_rx(greth->netdev, budget - work_done); |
|
} |
|
|
|
if (work_done < budget) { |
|
|
|
spin_lock_irqsave(&greth->devlock, flags); |
|
|
|
ctrl = GRETH_REGLOAD(greth->regs->control); |
|
if ((greth->gbit_mac && (greth->tx_last != greth->tx_next)) || |
|
(!greth->gbit_mac && netif_queue_stopped(greth->netdev))) { |
|
GRETH_REGSAVE(greth->regs->control, |
|
ctrl | GRETH_TXI | GRETH_RXI); |
|
mask = GRETH_INT_RX | GRETH_INT_RE | |
|
GRETH_INT_TX | GRETH_INT_TE; |
|
} else { |
|
GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_RXI); |
|
mask = GRETH_INT_RX | GRETH_INT_RE; |
|
} |
|
|
|
if (GRETH_REGLOAD(greth->regs->status) & mask) { |
|
GRETH_REGSAVE(greth->regs->control, ctrl); |
|
spin_unlock_irqrestore(&greth->devlock, flags); |
|
goto restart_txrx_poll; |
|
} else { |
|
napi_complete_done(napi, work_done); |
|
spin_unlock_irqrestore(&greth->devlock, flags); |
|
} |
|
} |
|
|
|
return work_done; |
|
} |
|
|
|
static int greth_set_mac_add(struct net_device *dev, void *p) |
|
{ |
|
struct sockaddr *addr = p; |
|
struct greth_private *greth; |
|
struct greth_regs *regs; |
|
|
|
greth = netdev_priv(dev); |
|
regs = greth->regs; |
|
|
|
if (!is_valid_ether_addr(addr->sa_data)) |
|
return -EADDRNOTAVAIL; |
|
|
|
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
|
GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); |
|
GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | |
|
dev->dev_addr[4] << 8 | dev->dev_addr[5]); |
|
|
|
return 0; |
|
} |
|
|
|
static u32 greth_hash_get_index(__u8 *addr) |
|
{ |
|
return (ether_crc(6, addr)) & 0x3F; |
|
} |
|
|
|
static void greth_set_hash_filter(struct net_device *dev) |
|
{ |
|
struct netdev_hw_addr *ha; |
|
struct greth_private *greth = netdev_priv(dev); |
|
struct greth_regs *regs = greth->regs; |
|
u32 mc_filter[2]; |
|
unsigned int bitnr; |
|
|
|
mc_filter[0] = mc_filter[1] = 0; |
|
|
|
netdev_for_each_mc_addr(ha, dev) { |
|
bitnr = greth_hash_get_index(ha->addr); |
|
mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); |
|
} |
|
|
|
GRETH_REGSAVE(regs->hash_msb, mc_filter[1]); |
|
GRETH_REGSAVE(regs->hash_lsb, mc_filter[0]); |
|
} |
|
|
|
static void greth_set_multicast_list(struct net_device *dev) |
|
{ |
|
int cfg; |
|
struct greth_private *greth = netdev_priv(dev); |
|
struct greth_regs *regs = greth->regs; |
|
|
|
cfg = GRETH_REGLOAD(regs->control); |
|
if (dev->flags & IFF_PROMISC) |
|
cfg |= GRETH_CTRL_PR; |
|
else |
|
cfg &= ~GRETH_CTRL_PR; |
|
|
|
if (greth->multicast) { |
|
if (dev->flags & IFF_ALLMULTI) { |
|
GRETH_REGSAVE(regs->hash_msb, -1); |
|
GRETH_REGSAVE(regs->hash_lsb, -1); |
|
cfg |= GRETH_CTRL_MCEN; |
|
GRETH_REGSAVE(regs->control, cfg); |
|
return; |
|
} |
|
|
|
if (netdev_mc_empty(dev)) { |
|
cfg &= ~GRETH_CTRL_MCEN; |
|
GRETH_REGSAVE(regs->control, cfg); |
|
return; |
|
} |
|
|
|
/* Setup multicast filter */ |
|
greth_set_hash_filter(dev); |
|
cfg |= GRETH_CTRL_MCEN; |
|
} |
|
GRETH_REGSAVE(regs->control, cfg); |
|
} |
|
|
|
static u32 greth_get_msglevel(struct net_device *dev) |
|
{ |
|
struct greth_private *greth = netdev_priv(dev); |
|
return greth->msg_enable; |
|
} |
|
|
|
static void greth_set_msglevel(struct net_device *dev, u32 value) |
|
{ |
|
struct greth_private *greth = netdev_priv(dev); |
|
greth->msg_enable = value; |
|
} |
|
|
|
static int greth_get_regs_len(struct net_device *dev) |
|
{ |
|
return sizeof(struct greth_regs); |
|
} |
|
|
|
static void greth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
|
{ |
|
struct greth_private *greth = netdev_priv(dev); |
|
|
|
strlcpy(info->driver, dev_driver_string(greth->dev), |
|
sizeof(info->driver)); |
|
strlcpy(info->bus_info, greth->dev->bus->name, sizeof(info->bus_info)); |
|
} |
|
|
|
static void greth_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) |
|
{ |
|
int i; |
|
struct greth_private *greth = netdev_priv(dev); |
|
u32 __iomem *greth_regs = (u32 __iomem *) greth->regs; |
|
u32 *buff = p; |
|
|
|
for (i = 0; i < sizeof(struct greth_regs) / sizeof(u32); i++) |
|
buff[i] = greth_read_bd(&greth_regs[i]); |
|
} |
|
|
|
static const struct ethtool_ops greth_ethtool_ops = { |
|
.get_msglevel = greth_get_msglevel, |
|
.set_msglevel = greth_set_msglevel, |
|
.get_drvinfo = greth_get_drvinfo, |
|
.get_regs_len = greth_get_regs_len, |
|
.get_regs = greth_get_regs, |
|
.get_link = ethtool_op_get_link, |
|
.get_link_ksettings = phy_ethtool_get_link_ksettings, |
|
.set_link_ksettings = phy_ethtool_set_link_ksettings, |
|
}; |
|
|
|
static struct net_device_ops greth_netdev_ops = { |
|
.ndo_open = greth_open, |
|
.ndo_stop = greth_close, |
|
.ndo_start_xmit = greth_start_xmit, |
|
.ndo_set_mac_address = greth_set_mac_add, |
|
.ndo_validate_addr = eth_validate_addr, |
|
}; |
|
|
|
static inline int wait_for_mdio(struct greth_private *greth) |
|
{ |
|
unsigned long timeout = jiffies + 4*HZ/100; |
|
while (GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_BUSY) { |
|
if (time_after(jiffies, timeout)) |
|
return 0; |
|
} |
|
return 1; |
|
} |
|
|
|
static int greth_mdio_read(struct mii_bus *bus, int phy, int reg) |
|
{ |
|
struct greth_private *greth = bus->priv; |
|
int data; |
|
|
|
if (!wait_for_mdio(greth)) |
|
return -EBUSY; |
|
|
|
GRETH_REGSAVE(greth->regs->mdio, ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 2); |
|
|
|
if (!wait_for_mdio(greth)) |
|
return -EBUSY; |
|
|
|
if (!(GRETH_REGLOAD(greth->regs->mdio) & GRETH_MII_NVALID)) { |
|
data = (GRETH_REGLOAD(greth->regs->mdio) >> 16) & 0xFFFF; |
|
return data; |
|
|
|
} else { |
|
return -1; |
|
} |
|
} |
|
|
|
static int greth_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val) |
|
{ |
|
struct greth_private *greth = bus->priv; |
|
|
|
if (!wait_for_mdio(greth)) |
|
return -EBUSY; |
|
|
|
GRETH_REGSAVE(greth->regs->mdio, |
|
((val & 0xFFFF) << 16) | ((phy & 0x1F) << 11) | ((reg & 0x1F) << 6) | 1); |
|
|
|
if (!wait_for_mdio(greth)) |
|
return -EBUSY; |
|
|
|
return 0; |
|
} |
|
|
|
static void greth_link_change(struct net_device *dev) |
|
{ |
|
struct greth_private *greth = netdev_priv(dev); |
|
struct phy_device *phydev = dev->phydev; |
|
unsigned long flags; |
|
int status_change = 0; |
|
u32 ctrl; |
|
|
|
spin_lock_irqsave(&greth->devlock, flags); |
|
|
|
if (phydev->link) { |
|
|
|
if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) { |
|
ctrl = GRETH_REGLOAD(greth->regs->control) & |
|
~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB); |
|
|
|
if (phydev->duplex) |
|
ctrl |= GRETH_CTRL_FD; |
|
|
|
if (phydev->speed == SPEED_100) |
|
ctrl |= GRETH_CTRL_SP; |
|
else if (phydev->speed == SPEED_1000) |
|
ctrl |= GRETH_CTRL_GB; |
|
|
|
GRETH_REGSAVE(greth->regs->control, ctrl); |
|
greth->speed = phydev->speed; |
|
greth->duplex = phydev->duplex; |
|
status_change = 1; |
|
} |
|
} |
|
|
|
if (phydev->link != greth->link) { |
|
if (!phydev->link) { |
|
greth->speed = 0; |
|
greth->duplex = -1; |
|
} |
|
greth->link = phydev->link; |
|
|
|
status_change = 1; |
|
} |
|
|
|
spin_unlock_irqrestore(&greth->devlock, flags); |
|
|
|
if (status_change) { |
|
if (phydev->link) |
|
pr_debug("%s: link up (%d/%s)\n", |
|
dev->name, phydev->speed, |
|
DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); |
|
else |
|
pr_debug("%s: link down\n", dev->name); |
|
} |
|
} |
|
|
|
static int greth_mdio_probe(struct net_device *dev) |
|
{ |
|
struct greth_private *greth = netdev_priv(dev); |
|
struct phy_device *phy = NULL; |
|
int ret; |
|
|
|
/* Find the first PHY */ |
|
phy = phy_find_first(greth->mdio); |
|
|
|
if (!phy) { |
|
if (netif_msg_probe(greth)) |
|
dev_err(&dev->dev, "no PHY found\n"); |
|
return -ENXIO; |
|
} |
|
|
|
ret = phy_connect_direct(dev, phy, &greth_link_change, |
|
greth->gbit_mac ? PHY_INTERFACE_MODE_GMII : PHY_INTERFACE_MODE_MII); |
|
if (ret) { |
|
if (netif_msg_ifup(greth)) |
|
dev_err(&dev->dev, "could not attach to PHY\n"); |
|
return ret; |
|
} |
|
|
|
if (greth->gbit_mac) |
|
phy_set_max_speed(phy, SPEED_1000); |
|
else |
|
phy_set_max_speed(phy, SPEED_100); |
|
|
|
linkmode_copy(phy->advertising, phy->supported); |
|
|
|
greth->link = 0; |
|
greth->speed = 0; |
|
greth->duplex = -1; |
|
|
|
return 0; |
|
} |
|
|
|
static int greth_mdio_init(struct greth_private *greth) |
|
{ |
|
int ret; |
|
unsigned long timeout; |
|
struct net_device *ndev = greth->netdev; |
|
|
|
greth->mdio = mdiobus_alloc(); |
|
if (!greth->mdio) { |
|
return -ENOMEM; |
|
} |
|
|
|
greth->mdio->name = "greth-mdio"; |
|
snprintf(greth->mdio->id, MII_BUS_ID_SIZE, "%s-%d", greth->mdio->name, greth->irq); |
|
greth->mdio->read = greth_mdio_read; |
|
greth->mdio->write = greth_mdio_write; |
|
greth->mdio->priv = greth; |
|
|
|
ret = mdiobus_register(greth->mdio); |
|
if (ret) { |
|
goto error; |
|
} |
|
|
|
ret = greth_mdio_probe(greth->netdev); |
|
if (ret) { |
|
if (netif_msg_probe(greth)) |
|
dev_err(&greth->netdev->dev, "failed to probe MDIO bus\n"); |
|
goto unreg_mdio; |
|
} |
|
|
|
phy_start(ndev->phydev); |
|
|
|
/* If Ethernet debug link is used make autoneg happen right away */ |
|
if (greth->edcl && greth_edcl == 1) { |
|
phy_start_aneg(ndev->phydev); |
|
timeout = jiffies + 6*HZ; |
|
while (!phy_aneg_done(ndev->phydev) && |
|
time_before(jiffies, timeout)) { |
|
} |
|
phy_read_status(ndev->phydev); |
|
greth_link_change(greth->netdev); |
|
} |
|
|
|
return 0; |
|
|
|
unreg_mdio: |
|
mdiobus_unregister(greth->mdio); |
|
error: |
|
mdiobus_free(greth->mdio); |
|
return ret; |
|
} |
|
|
|
/* Initialize the GRETH MAC */ |
|
static int greth_of_probe(struct platform_device *ofdev) |
|
{ |
|
struct net_device *dev; |
|
struct greth_private *greth; |
|
struct greth_regs *regs; |
|
|
|
int i; |
|
int err; |
|
int tmp; |
|
unsigned long timeout; |
|
|
|
dev = alloc_etherdev(sizeof(struct greth_private)); |
|
|
|
if (dev == NULL) |
|
return -ENOMEM; |
|
|
|
greth = netdev_priv(dev); |
|
greth->netdev = dev; |
|
greth->dev = &ofdev->dev; |
|
|
|
if (greth_debug > 0) |
|
greth->msg_enable = greth_debug; |
|
else |
|
greth->msg_enable = GRETH_DEF_MSG_ENABLE; |
|
|
|
spin_lock_init(&greth->devlock); |
|
|
|
greth->regs = of_ioremap(&ofdev->resource[0], 0, |
|
resource_size(&ofdev->resource[0]), |
|
"grlib-greth regs"); |
|
|
|
if (greth->regs == NULL) { |
|
if (netif_msg_probe(greth)) |
|
dev_err(greth->dev, "ioremap failure.\n"); |
|
err = -EIO; |
|
goto error1; |
|
} |
|
|
|
regs = greth->regs; |
|
greth->irq = ofdev->archdata.irqs[0]; |
|
|
|
dev_set_drvdata(greth->dev, dev); |
|
SET_NETDEV_DEV(dev, greth->dev); |
|
|
|
if (netif_msg_probe(greth)) |
|
dev_dbg(greth->dev, "resetting controller.\n"); |
|
|
|
/* Reset the controller. */ |
|
GRETH_REGSAVE(regs->control, GRETH_RESET); |
|
|
|
/* Wait for MAC to reset itself */ |
|
timeout = jiffies + HZ/100; |
|
while (GRETH_REGLOAD(regs->control) & GRETH_RESET) { |
|
if (time_after(jiffies, timeout)) { |
|
err = -EIO; |
|
if (netif_msg_probe(greth)) |
|
dev_err(greth->dev, "timeout when waiting for reset.\n"); |
|
goto error2; |
|
} |
|
} |
|
|
|
/* Get default PHY address */ |
|
greth->phyaddr = (GRETH_REGLOAD(regs->mdio) >> 11) & 0x1F; |
|
|
|
/* Check if we have GBIT capable MAC */ |
|
tmp = GRETH_REGLOAD(regs->control); |
|
greth->gbit_mac = (tmp >> 27) & 1; |
|
|
|
/* Check for multicast capability */ |
|
greth->multicast = (tmp >> 25) & 1; |
|
|
|
greth->edcl = (tmp >> 31) & 1; |
|
|
|
/* If we have EDCL we disable the EDCL speed-duplex FSM so |
|
* it doesn't interfere with the software */ |
|
if (greth->edcl != 0) |
|
GRETH_REGORIN(regs->control, GRETH_CTRL_DISDUPLEX); |
|
|
|
/* Check if MAC can handle MDIO interrupts */ |
|
greth->mdio_int_en = (tmp >> 26) & 1; |
|
|
|
err = greth_mdio_init(greth); |
|
if (err) { |
|
if (netif_msg_probe(greth)) |
|
dev_err(greth->dev, "failed to register MDIO bus\n"); |
|
goto error2; |
|
} |
|
|
|
/* Allocate TX descriptor ring in coherent memory */ |
|
greth->tx_bd_base = dma_alloc_coherent(greth->dev, 1024, |
|
&greth->tx_bd_base_phys, |
|
GFP_KERNEL); |
|
if (!greth->tx_bd_base) { |
|
err = -ENOMEM; |
|
goto error3; |
|
} |
|
|
|
/* Allocate RX descriptor ring in coherent memory */ |
|
greth->rx_bd_base = dma_alloc_coherent(greth->dev, 1024, |
|
&greth->rx_bd_base_phys, |
|
GFP_KERNEL); |
|
if (!greth->rx_bd_base) { |
|
err = -ENOMEM; |
|
goto error4; |
|
} |
|
|
|
/* Get MAC address from: module param, OF property or ID prom */ |
|
for (i = 0; i < 6; i++) { |
|
if (macaddr[i] != 0) |
|
break; |
|
} |
|
if (i == 6) { |
|
u8 addr[ETH_ALEN]; |
|
|
|
err = of_get_mac_address(ofdev->dev.of_node, addr); |
|
if (!err) { |
|
for (i = 0; i < 6; i++) |
|
macaddr[i] = (unsigned int) addr[i]; |
|
} else { |
|
#ifdef CONFIG_SPARC |
|
for (i = 0; i < 6; i++) |
|
macaddr[i] = (unsigned int) idprom->id_ethaddr[i]; |
|
#endif |
|
} |
|
} |
|
|
|
for (i = 0; i < 6; i++) |
|
dev->dev_addr[i] = macaddr[i]; |
|
|
|
macaddr[5]++; |
|
|
|
if (!is_valid_ether_addr(&dev->dev_addr[0])) { |
|
if (netif_msg_probe(greth)) |
|
dev_err(greth->dev, "no valid ethernet address, aborting.\n"); |
|
err = -EINVAL; |
|
goto error5; |
|
} |
|
|
|
GRETH_REGSAVE(regs->esa_msb, dev->dev_addr[0] << 8 | dev->dev_addr[1]); |
|
GRETH_REGSAVE(regs->esa_lsb, dev->dev_addr[2] << 24 | dev->dev_addr[3] << 16 | |
|
dev->dev_addr[4] << 8 | dev->dev_addr[5]); |
|
|
|
/* Clear all pending interrupts except PHY irq */ |
|
GRETH_REGSAVE(regs->status, 0xFF); |
|
|
|
if (greth->gbit_mac) { |
|
dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | |
|
NETIF_F_RXCSUM; |
|
dev->features = dev->hw_features | NETIF_F_HIGHDMA; |
|
greth_netdev_ops.ndo_start_xmit = greth_start_xmit_gbit; |
|
} |
|
|
|
if (greth->multicast) { |
|
greth_netdev_ops.ndo_set_rx_mode = greth_set_multicast_list; |
|
dev->flags |= IFF_MULTICAST; |
|
} else { |
|
dev->flags &= ~IFF_MULTICAST; |
|
} |
|
|
|
dev->netdev_ops = &greth_netdev_ops; |
|
dev->ethtool_ops = &greth_ethtool_ops; |
|
|
|
err = register_netdev(dev); |
|
if (err) { |
|
if (netif_msg_probe(greth)) |
|
dev_err(greth->dev, "netdevice registration failed.\n"); |
|
goto error5; |
|
} |
|
|
|
/* setup NAPI */ |
|
netif_napi_add(dev, &greth->napi, greth_poll, 64); |
|
|
|
return 0; |
|
|
|
error5: |
|
dma_free_coherent(greth->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); |
|
error4: |
|
dma_free_coherent(greth->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); |
|
error3: |
|
mdiobus_unregister(greth->mdio); |
|
error2: |
|
of_iounmap(&ofdev->resource[0], greth->regs, resource_size(&ofdev->resource[0])); |
|
error1: |
|
free_netdev(dev); |
|
return err; |
|
} |
|
|
|
static int greth_of_remove(struct platform_device *of_dev) |
|
{ |
|
struct net_device *ndev = platform_get_drvdata(of_dev); |
|
struct greth_private *greth = netdev_priv(ndev); |
|
|
|
/* Free descriptor areas */ |
|
dma_free_coherent(&of_dev->dev, 1024, greth->rx_bd_base, greth->rx_bd_base_phys); |
|
|
|
dma_free_coherent(&of_dev->dev, 1024, greth->tx_bd_base, greth->tx_bd_base_phys); |
|
|
|
if (ndev->phydev) |
|
phy_stop(ndev->phydev); |
|
mdiobus_unregister(greth->mdio); |
|
|
|
unregister_netdev(ndev); |
|
|
|
of_iounmap(&of_dev->resource[0], greth->regs, resource_size(&of_dev->resource[0])); |
|
|
|
free_netdev(ndev); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct of_device_id greth_of_match[] = { |
|
{ |
|
.name = "GAISLER_ETHMAC", |
|
}, |
|
{ |
|
.name = "01_01d", |
|
}, |
|
{}, |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(of, greth_of_match); |
|
|
|
static struct platform_driver greth_of_driver = { |
|
.driver = { |
|
.name = "grlib-greth", |
|
.of_match_table = greth_of_match, |
|
}, |
|
.probe = greth_of_probe, |
|
.remove = greth_of_remove, |
|
}; |
|
|
|
module_platform_driver(greth_of_driver); |
|
|
|
MODULE_AUTHOR("Aeroflex Gaisler AB."); |
|
MODULE_DESCRIPTION("Aeroflex Gaisler Ethernet MAC driver"); |
|
MODULE_LICENSE("GPL");
|
|
|