/* b44.c: Broadcom 44xx/47xx Fast Ethernet device driver.
*
* Copyright (C) 2002 David S. Miller (davem@redhat.com)
* Copyright (C) 2004 Pekka Pietikainen (pp@ee.oulu.fi)
* Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
* Copyright (C) 2006 Felix Fietkau (nbd@openwrt.org)
* Copyright (C) 2006 Broadcom Corporation.
* Copyright (C) 2007 Michael Buesch <m@bues.ch>
* Copyright (C) 2013 Hauke Mehrtens <hauke@hauke-m.de>
*
* Distribute under GPL.
*/
#define pr_fmt(fmt) KBUILD_MODNAME
": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/etherdevice.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/ssb/ssb.h>
#include <linux/slab.h>
#include <linux/phy.h>
#include <linux/uaccess.h>
#include <
asm/io.h>
#include <
asm/irq.h>
#include "b44.h"
#define DRV_MODULE_NAME
"b44"
#define DRV_DESCRIPTION
"Broadcom 44xx/47xx 10/100 PCI ethernet driver"
#define B44_DEF_MSG_ENABLE \
(NETIF_MSG_DRV | \
NETIF_MSG_PROBE | \
NETIF_MSG_LINK | \
NETIF_MSG_TIMER | \
NETIF_MSG_IFDOWN | \
NETIF_MSG_IFUP | \
NETIF_MSG_RX_ERR | \
NETIF_MSG_TX_ERR)
/* length of time before we decide the hardware is borked,
* and dev->tx_timeout() should be called to fix the problem
*/
#define B44_TX_TIMEOUT (
5 * HZ)
/* hardware minimum and maximum for a single frame's data payload */
#define B44_MIN_MTU ETH_ZLEN
#define B44_MAX_MTU ETH_DATA_LEN
#define B44_RX_RING_SIZE
512
#define B44_DEF_RX_RING_PENDING
200
#define B44_RX_RING_BYTES (
sizeof(
struct dma_desc) * \
B44_RX_RING_SIZE)
#define B44_TX_RING_SIZE
512
#define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE -
1)
#define B44_TX_RING_BYTES (
sizeof(
struct dma_desc) * \
B44_TX_RING_SIZE)
#define TX_RING_GAP(BP) \
(B44_TX_RING_SIZE - (BP)->tx_pending)
#define TX_BUFFS_AVAIL(BP) \
(((BP)->tx_cons <= (BP)->tx_prod) ? \
(BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \
(BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
#define NEXT_TX(N) (((N) +
1) & (B44_TX_RING_SIZE -
1))
#define RX_PKT_OFFSET (RX_HEADER_LEN +
2)
#define RX_PKT_BUF_SZ (
1536 + RX_PKT_OFFSET)
/* minimum number of free TX descriptors required to wake up TX process */
#define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE /
4)
/* b44 internal pattern match filter info */
#define B44_PATTERN_BASE
0x400
#define B44_PATTERN_SIZE
0x80
#define B44_PMASK_BASE
0x600
#define B44_PMASK_SIZE
0x10
#define B44_MAX_PATTERNS
16
#define B44_ETHIPV6UDP_HLEN
62
#define B44_ETHIPV4UDP_HLEN
42
MODULE_AUTHOR(
"Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_LICENSE(
"GPL");
static int b44_debug = -
1;
/* -1 == use B44_DEF_MSG_ENABLE as value */
module_param(b44_debug,
int,
0);
MODULE_PARM_DESC(b44_debug,
"B44 bitmapped debugging message enable value");
#ifdef CONFIG_B44_PCI
static const struct pci_device_id b44_pci_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
{
0 }
/* terminate list with empty entry */
};
MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
static struct pci_driver b44_pci_driver = {
.name = DRV_MODULE_NAME,
.id_table = b44_pci_tbl,
};
#endif /* CONFIG_B44_PCI */
static const struct ssb_device_id b44_ssb_tbl[] = {
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
{},
};
MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
static void b44_halt(
struct b44 *);
static void b44_init_rings(
struct b44 *);
#define B44_FULL_RESET
1
#define B44_FULL_RESET_SKIP_PHY
2
#define B44_PARTIAL_RESET
3
#define B44_CHIP_RESET_FULL
4
#define B44_CHIP_RESET_PARTIAL
5
static void b44_init_hw(
struct b44 *,
int);
static int dma_desc_sync_size;
static int instance;
static const char b44_gstrings[][ETH_GSTRING_LEN] = {
#define _B44(x...)
# x,
B44_STAT_REG_DECLARE
#undef _B44
};
static inline void b44_sync_dma_desc_for_device(
struct ssb_device *sdev,
dma_addr_t dma_base,
unsigned long offset,
enum dma_data_direction dir)
{
dma_sync_single_for_device(sdev->dma_dev, dma_base + offset,
dma_desc_sync_size, dir);
}
static inline void b44_sync_dma_desc_for_cpu(
struct ssb_device *sdev,
dma_addr_t dma_base,
unsigned long offset,
enum dma_data_direction dir)
{
dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset,
dma_desc_sync_size, dir);
}
static inline unsigned long br32(
const struct b44 *bp,
unsigned long reg)
{
return ssb_read32(bp->sdev, reg);
}
static inline void bw32(
const struct b44 *bp,
unsigned long reg,
unsigned long val)
{
ssb_write32(bp->sdev, reg, val);
}
static int b44_wait_bit(
struct b44 *bp,
unsigned long reg,
u32 bit,
unsigned long timeout,
const int clear)
{
unsigned long i;
for (i =
0; i < timeout; i++) {
u32 val = br32(bp, reg);
if (clear && !(val & bit))
break;
if (!clear && (val & bit))
break;
udelay(
10);
}
if (i == timeout) {
if (net_ratelimit())
netdev_err(bp->dev,
"BUG! Timeout waiting for bit %08x of register %lx to %s\n",
bit, reg, clear ?
"clear" :
"set");
return -ENODEV;
}
return 0;
}
static inline void __b44_cam_write(
struct b44 *bp,
const unsigned char *data,
int index)
{
u32 val;
val = ((u32) data[
2]) <<
24;
val |= ((u32) data[
3]) <<
16;
val |= ((u32) data[
4]) <<
8;
val |= ((u32) data[
5]) <<
0;
bw32(bp, B44_CAM_DATA_LO, val);
val = (CAM_DATA_HI_VALID |
(((u32) data[
0]) <<
8) |
(((u32) data[
1]) <<
0));
bw32(bp, B44_CAM_DATA_HI, val);
bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
(index << CAM_CTRL_INDEX_SHIFT)));
b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY,
100,
1);
}
static inline void __b44_disable_ints(
struct b44 *bp)
{
bw32(bp, B44_IMASK,
0);
}
static void b44_disable_ints(
struct b44 *bp)
{
__b44_disable_ints(bp);
/* Flush posted writes. */
br32(bp, B44_IMASK);
}
static void b44_enable_ints(
struct b44 *bp)
{
bw32(bp, B44_IMASK, bp->imask);
}
static int __b44_readphy(
struct b44 *bp,
int phy_addr,
int reg, u32 *val)
{
int err;
bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
(MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
(phy_addr << MDIO_DATA_PMD_SHIFT) |
(reg << MDIO_DATA_RA_SHIFT) |
(MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII,
100,
0);
*val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
return err;
}
static int __b44_writephy(
struct b44 *bp,
int phy_addr,
int reg, u32 val)
{
bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
(MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
(phy_addr << MDIO_DATA_PMD_SHIFT) |
(reg << MDIO_DATA_RA_SHIFT) |
(MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
(val & MDIO_DATA_DATA)));
return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII,
100,
0);
}
static inline int b44_readphy(
struct b44 *bp,
int reg, u32 *val)
{
if (bp->flags & B44_FLAG_EXTERNAL_PHY)
return 0;
return __b44_readphy(bp, bp->phy_addr, reg, val);
}
static inline int b44_writephy(
struct b44 *bp,
int reg, u32 val)
{
if (bp->flags & B44_FLAG_EXTERNAL_PHY)
return 0;
return __b44_writephy(bp, bp->phy_addr, reg, val);
}
/* miilib interface */
static int b44_mdio_read_mii(
struct net_device *dev,
int phy_id,
int location)
{
u32 val;
struct b44 *bp = netdev_priv(dev);
int rc = __b44_readphy(bp, phy_id, location, &val);
if (rc)
return 0xffffffff;
return val;
}
static void b44_mdio_write_mii(
struct net_device *dev,
int phy_id,
int location,
int val)
{
struct b44 *bp = netdev_priv(dev);
__b44_writephy(bp, phy_id, location, val);
}
static int b44_mdio_read_phylib(
struct mii_bus *bus,
int phy_id,
int location)
{
u32 val;
struct b44 *bp = bus->priv;
int rc = __b44_readphy(bp, phy_id, location, &val);
if (rc)
return 0xffffffff;
return val;
}
static int b44_mdio_write_phylib(
struct mii_bus *bus,
int phy_id,
int location,
u16 val)
{
struct b44 *bp = bus->priv;
return __b44_writephy(bp, phy_id, location, val);
}
static int b44_phy_reset(
struct b44 *bp)
{
u32 val;
int err;
if (bp->flags & B44_FLAG_EXTERNAL_PHY)
return 0;
err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
if (err)
return err;
udelay(
100);
err = b44_readphy(bp, MII_BMCR, &val);
if (!err) {
if (val & BMCR_RESET) {
netdev_err(bp->dev,
"PHY Reset would not complete\n");
err = -ENODEV;
}
}
return err;
}
static void __b44_set_flow_ctrl(
struct b44 *bp, u32 pause_flags)
{
u32 val;
bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
bp->flags |= pause_flags;
val = br32(bp, B44_RXCONFIG);
if (pause_flags & B44_FLAG_RX_PAUSE)
val |= RXCONFIG_FLOW;
else
val &= ~RXCONFIG_FLOW;
bw32(bp, B44_RXCONFIG, val);
val = br32(bp, B44_MAC_FLOW);
if (pause_flags & B44_FLAG_TX_PAUSE)
val |= (MAC_FLOW_PAUSE_ENAB |
(
0xc0 & MAC_FLOW_RX_HI_WATER));
else
val &= ~MAC_FLOW_PAUSE_ENAB;
bw32(bp, B44_MAC_FLOW, val);
}
static void b44_set_flow_ctrl(
struct b44 *bp, u32 local, u32 remote)
{
u32 pause_enab =
0;
/* The driver supports only rx pause by default because
the b44 mac tx pause mechanism generates excessive
pause frames.
Use ethtool to turn on b44 tx pause if necessary.
*/
if ((local & ADVERTISE_PAUSE_CAP) &&
(local & ADVERTISE_PAUSE_ASYM)){
if ((remote & LPA_PAUSE_ASYM) &&
!(remote & LPA_PAUSE_CAP))
pause_enab |= B44_FLAG_RX_PAUSE;
}
__b44_set_flow_ctrl(bp, pause_enab);
}
#ifdef CONFIG_BCM47XX
#include <linux/bcm47xx_nvram.h>
static void b44_wap54g10_workaround(
struct b44 *bp)
{
char buf[
20];
u32 val;
int err;
/*
* workaround for bad hardware design in Linksys WAP54G v1.0
* see https://dev.openwrt.org/ticket/146
* check and reset bit "isolate"
*/
if (bcm47xx_nvram_getenv(
"boardnum", buf,
sizeof(buf)) <
0)
return;
if (simple_strtoul(buf, NULL,
0) ==
2) {
err = __b44_readphy(bp,
0, MII_BMCR, &val);
if (err)
goto error;
if (!(val & BMCR_ISOLATE))
return;
val &= ~BMCR_ISOLATE;
err = __b44_writephy(bp,
0, MII_BMCR, val);
if (err)
goto error;
}
return;
error:
pr_warn(
"PHY: cannot reset MII transceiver isolate bit\n");
}
#else
static inline void b44_wap54g10_workaround(
struct b44 *bp)
{
}
#endif
static int b44_setup_phy(
struct b44 *bp)
{
u32 val;
int err;
b44_wap54g10_workaround(bp);
if (bp->flags & B44_FLAG_EXTERNAL_PHY)
return 0;
if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) !=
0)
goto out;
if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
val & MII_ALEDCTRL_ALLMSK)) !=
0)
goto out;
if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) !=
0)
goto out;
if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
val | MII_TLEDCTRL_ENABLE)) !=
0)
goto out;
if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
u32 adv = ADVERTISE_CSMA;
if (bp->flags & B44_FLAG_ADV_10HALF)
adv |= ADVERTISE_10HALF;
if (bp->flags & B44_FLAG_ADV_10FULL)
adv |= ADVERTISE_10FULL;
if (bp->flags & B44_FLAG_ADV_100HALF)
adv |= ADVERTISE_100HALF;
if (bp->flags & B44_FLAG_ADV_100FULL)
adv |= ADVERTISE_100FULL;
if (bp->flags & B44_FLAG_PAUSE_AUTO)
adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) !=
0)
goto out;
if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
BMCR_ANRESTART))) !=
0)
goto out;
}
else {
u32 bmcr;
if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) !=
0)
goto out;
bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
if (bp->flags & B44_FLAG_100_BASE_T)
bmcr |= BMCR_SPEED100;
if (bp->flags & B44_FLAG_FULL_DUPLEX)
bmcr |= BMCR_FULLDPLX;
if ((err = b44_writephy(bp, MII_BMCR, bmcr)) !=
0)
goto out;
/* Since we will not be negotiating there is no safe way
* to determine if the link partner supports flow control
* or not. So just disable it completely in this case.
*/
b44_set_flow_ctrl(bp,
0,
0);
}
out:
return err;
}
static void b44_stats_update(
struct b44 *bp)
{
unsigned long reg;
u64 *val;
val = &bp->hw_stats.tx_good_octets;
u64_stats_update_begin(&bp->hw_stats.syncp);
for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg +=
4UL) {
*val++ += br32(bp, reg);
}
for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg +=
4UL) {
*val++ += br32(bp, reg);
}
u64_stats_update_end(&bp->hw_stats.syncp);
}
static void b44_link_report(
struct b44 *bp)
{
if (!netif_carrier_ok(bp->dev)) {
netdev_info(bp->dev,
"Link is down\n");
}
else {
netdev_info(bp->dev,
"Link is up at %d Mbps, %s duplex\n",
(bp->flags & B44_FLAG_100_BASE_T) ?
100 :
10,
(bp->flags & B44_FLAG_FULL_DUPLEX) ?
"full" :
"half");
netdev_info(bp->dev,
"Flow control is %s for TX and %s for RX\n",
(bp->flags & B44_FLAG_TX_PAUSE) ?
"on" :
"off",
(bp->flags & B44_FLAG_RX_PAUSE) ?
"on" :
"off");
}
}
static void b44_check_phy(
struct b44 *bp)
{
u32 bmsr, aux;
if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
bp->flags |= B44_FLAG_100_BASE_T;
if (!netif_carrier_ok(bp->dev)) {
u32 val = br32(bp, B44_TX_CTRL);
if (bp->flags & B44_FLAG_FULL_DUPLEX)
val |= TX_CTRL_DUPLEX;
else
val &= ~TX_CTRL_DUPLEX;
bw32(bp, B44_TX_CTRL, val);
netif_carrier_on(bp->dev);
b44_link_report(bp);
}
return;
}
if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
!b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
(bmsr !=
0xffff)) {
if (aux & MII_AUXCTRL_SPEED)
bp->flags |= B44_FLAG_100_BASE_T;
else
bp->flags &= ~B44_FLAG_100_BASE_T;
if (aux & MII_AUXCTRL_DUPLEX)
bp->flags |= B44_FLAG_FULL_DUPLEX;
else
bp->flags &= ~B44_FLAG_FULL_DUPLEX;
if (!netif_carrier_ok(bp->dev) &&
(bmsr & BMSR_LSTATUS)) {
u32 val = br32(bp, B44_TX_CTRL);
u32 local_adv, remote_adv;
if (bp->flags & B44_FLAG_FULL_DUPLEX)
val |= TX_CTRL_DUPLEX;
else
val &= ~TX_CTRL_DUPLEX;
bw32(bp, B44_TX_CTRL, val);
if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
!b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
!b44_readphy(bp, MII_LPA, &remote_adv))
b44_set_flow_ctrl(bp, local_adv, remote_adv);
/* Link now up */
netif_carrier_on(bp->dev);
b44_link_report(bp);
}
else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
/* Link now down */
netif_carrier_off(bp->dev);
b44_link_report(bp);
}
if (bmsr & BMSR_RFAULT)
netdev_warn(bp->dev,
"Remote fault detected in PHY\n");
if (bmsr & BMSR_JCD)
netdev_warn(bp->dev,
"Jabber detected in PHY\n");
}
}
static void b44_timer(
struct timer_list *t)
{
struct b44 *bp = timer_container_of(bp, t, timer);
spin_lock_irq(&bp->lock);
b44_check_phy(bp);
b44_stats_update(bp);
spin_unlock_irq(&bp->lock);
mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
}
static void b44_tx(
struct b44 *bp)
{
u32 cur, cons;
unsigned bytes_compl =
0, pkts_compl =
0;
cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
cur /=
sizeof(
struct dma_desc);
/* XXX needs updating when NETIF_F_SG is supported */
for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
struct ring_info *rp = &bp->tx_buffers[cons];
struct sk_buff *skb = rp->skb;
BUG_ON(skb == NULL);
dma_unmap_single(bp->sdev->dma_dev,
rp->mapping,
skb->len,
DMA_TO_DEVICE);
rp->skb = NULL;
bytes_compl += skb->len;
pkts_compl++;
dev_consume_skb_irq(skb);
}
netdev_completed_queue(bp->dev, pkts_compl, bytes_compl);
bp->tx_cons = cons;
if (netif_queue_stopped(bp->dev) &&
TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
netif_wake_queue(bp->dev);
bw32(bp, B44_GPTIMER,
0);
}
/* Works like this. This chip writes a 'struct rx_header" 30 bytes
* before the DMA address you give it. So we allocate 30 more bytes
* for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
* point the chip at 30 bytes past where the rx_header will go.
*/
static int b44_alloc_rx_skb(
struct b44 *bp,
int src_idx, u32 dest_idx_unmasked)
{
struct dma_desc *dp;
struct ring_info *src_map, *map;
struct rx_header *rh;
struct sk_buff *skb;
dma_addr_t mapping;
int dest_idx;
u32 ctrl;
src_map = NULL;
if (src_idx >=
0)
src_map = &bp->rx_buffers[src_idx];
dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE -
1);
map = &bp->rx_buffers[dest_idx];
skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
if (skb == NULL)
return -ENOMEM;
mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
/* Hardware bug work-around, the chip is unable to do PCI DMA
to/from anything above 1GB :-( */
if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(
30)) {
/* Sigh... */
if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
dma_unmap_single(bp->sdev->dma_dev, mapping,
RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
skb = alloc_skb(RX_PKT_BUF_SZ, GFP_ATOMIC | GFP_DMA);
if (skb == NULL)
return -ENOMEM;
mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(
30)) {
if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
return -ENOMEM;
}
bp->force_copybreak =
1;
}
rh = (
struct rx_header *) skb->data;
rh->len =
0;
rh->flags =
0;
map->skb = skb;
map->mapping = mapping;
if (src_map != NULL)
src_map->skb = NULL;
ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ);
if (dest_idx == (B44_RX_RING_SIZE -
1))
ctrl |= DESC_CTRL_EOT;
dp = &bp->rx_ring[dest_idx];
dp->ctrl = cpu_to_le32(ctrl);
dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset);
if (bp->flags & B44_FLAG_RX_RING_HACK)
b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
dest_idx *
sizeof(*dp),
DMA_BIDIRECTIONAL);
return RX_PKT_BUF_SZ;
}
static void b44_recycle_rx(
struct b44 *bp,
int src_idx, u32 dest_idx_unmasked)
{
struct dma_desc *src_desc, *dest_desc;
struct ring_info *src_map, *dest_map;
struct rx_header *rh;
int dest_idx;
__le32 ctrl;
dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE -
1);
dest_desc = &bp->rx_ring[dest_idx];
dest_map = &bp->rx_buffers[dest_idx];
src_desc = &bp->rx_ring[src_idx];
src_map = &bp->rx_buffers[src_idx];
dest_map->skb = src_map->skb;
rh = (
struct rx_header *) src_map->skb->data;
rh->len =
0;
rh->flags =
0;
dest_map->mapping = src_map->mapping;
if (bp->flags & B44_FLAG_RX_RING_HACK)
b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
src_idx *
sizeof(*src_desc),
DMA_BIDIRECTIONAL);
ctrl = src_desc->ctrl;
if (dest_idx == (B44_RX_RING_SIZE -
1))
ctrl |= cpu_to_le32(DESC_CTRL_EOT);
else
ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
dest_desc->ctrl = ctrl;
dest_desc->addr = src_desc->addr;
src_map->skb = NULL;
if (bp->flags & B44_FLAG_RX_RING_HACK)
b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
dest_idx *
sizeof(*dest_desc),
DMA_BIDIRECTIONAL);
dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping,
RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
}
static int b44_rx(
struct b44 *bp,
int budget)
{
int received;
u32 cons, prod;
received =
0;
prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
prod /=
sizeof(
struct dma_desc);
cons = bp->rx_cons;
while (cons != prod && budget >
0) {
struct ring_info *rp = &bp->rx_buffers[cons];
struct sk_buff *skb = rp->skb;
dma_addr_t map = rp->mapping;
struct rx_header *rh;
u16 len;
dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
rh = (
struct rx_header *) skb->data;
len = le16_to_cpu(rh->len);
if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
(rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
drop_it:
b44_recycle_rx(bp, cons, bp->rx_prod);
drop_it_no_recycle:
bp->dev->stats.rx_dropped++;
goto next_pkt;
}
if (len ==
0) {
int i =
0;
do {
udelay(
2);
barrier();
len = le16_to_cpu(rh->len);
}
while (len ==
0 && i++ <
5);
if (len ==
0)
goto drop_it;
}
/* Omit CRC. */
len -=
4;
if (!bp->force_copybreak && len > RX_COPY_THRESHOLD) {
int skb_size;
skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
if (skb_size <
0)
goto drop_it;
dma_unmap_single(bp->sdev->dma_dev, map,
skb_size, DMA_FROM_DEVICE);
/* Leave out rx_header */
skb_put(skb, len + RX_PKT_OFFSET);
skb_pull(skb, RX_PKT_OFFSET);
}
else {
struct sk_buff *copy_skb;
b44_recycle_rx(bp, cons, bp->rx_prod);
copy_skb = napi_alloc_skb(&bp->napi, len);
if (copy_skb == NULL)
goto drop_it_no_recycle;
skb_put(copy_skb, len);
/* DMA sync done above, copy just the actual packet */
skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
copy_skb->data, len);
skb = copy_skb;
}
skb_checksum_none_assert(skb);
skb->protocol = eth_type_trans(skb, bp->dev);
netif_receive_skb(skb);
received++;
budget--;
next_pkt:
bp->rx_prod = (bp->rx_prod +
1) &
(B44_RX_RING_SIZE -
1);
cons = (cons +
1) & (B44_RX_RING_SIZE -
1);
}
bp->rx_cons = cons;
bw32(bp, B44_DMARX_PTR, cons *
sizeof(
struct dma_desc));
return received;
}
static int b44_poll(
struct napi_struct *napi,
int budget)
{
struct b44 *bp = container_of(napi,
struct b44, napi);
int work_done;
unsigned long flags;
spin_lock_irqsave(&bp->lock, flags);
if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
/* spin_lock(&bp->tx_lock); */
b44_tx(bp);
/* spin_unlock(&bp->tx_lock); */
}
if (bp->istat & ISTAT_RFO) {
/* fast recovery, in ~20msec */
bp->istat &= ~ISTAT_RFO;
b44_disable_ints(bp);
ssb_device_enable(bp->sdev,
0);
/* resets ISTAT_RFO */
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
netif_wake_queue(bp->dev);
}
spin_unlock_irqrestore(&bp->lock, flags);
work_done =
0;
if (bp->istat & ISTAT_RX)
work_done += b44_rx(bp, budget);
if (bp->istat & ISTAT_ERRORS) {
spin_lock_irqsave(&bp->lock, flags);
b44_halt(bp);
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
netif_wake_queue(bp->dev);
spin_unlock_irqrestore(&bp->lock, flags);
work_done =
0;
}
if (work_done < budget) {
napi_complete_done(napi, work_done);
b44_enable_ints(bp);
}
return work_done;
}
static irqreturn_t b44_interrupt(
int irq,
void *dev_id)
{
struct net_device *dev = dev_id;
struct b44 *bp = netdev_priv(dev);
u32 istat, imask;
int handled =
0;
spin_lock(&bp->lock);
istat = br32(bp, B44_ISTAT);
imask = br32(bp, B44_IMASK);
/* The interrupt mask register controls which interrupt bits
* will actually raise an interrupt to the CPU when set by hw/firmware,
* but doesn't mask off the bits.
*/
istat &= imask;
if (istat) {
handled =
1;
if (unlikely(!netif_running(dev))) {
netdev_info(dev,
"late interrupt\n");
goto irq_ack;
}
if (napi_schedule_prep(&bp->napi)) {
/* NOTE: These writes are posted by the readback of
* the ISTAT register below.
*/
bp->istat = istat;
__b44_disable_ints(bp);
__napi_schedule(&bp->napi);
}
irq_ack:
bw32(bp, B44_ISTAT, istat);
br32(bp, B44_ISTAT);
}
spin_unlock(&bp->lock);
return IRQ_RETVAL(handled);
}
static void b44_tx_timeout(
struct net_device *dev,
unsigned int txqueue)
{
struct b44 *bp = netdev_priv(dev);
netdev_err(dev,
"transmit timed out, resetting\n");
spin_lock_irq(&bp->lock);
b44_halt(bp);
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET);
spin_unlock_irq(&bp->lock);
b44_enable_ints(bp);
netif_wake_queue(dev);
}
static netdev_tx_t b44_start_xmit(
struct sk_buff *skb,
struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
int rc = NETDEV_TX_OK;
dma_addr_t mapping;
u32 len, entry, ctrl;
unsigned long flags;
len = skb->len;
spin_lock_irqsave(&bp->lock, flags);
/* This is a hard error, log it. */
if (unlikely(TX_BUFFS_AVAIL(bp) <
1)) {
netif_stop_queue(dev);
netdev_err(dev,
"BUG! Tx Ring full when queue awake!\n");
goto err_out;
}
mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(
30)) {
struct sk_buff *bounce_skb;
/* Chip can't handle DMA to/from >1GB, use bounce buffer */
if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
dma_unmap_single(bp->sdev->dma_dev, mapping, len,
DMA_TO_DEVICE);
bounce_skb = alloc_skb(len, GFP_ATOMIC | GFP_DMA);
if (!bounce_skb)
goto err_out;
mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
len, DMA_TO_DEVICE);
if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(
30)) {
if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
dma_unmap_single(bp->sdev->dma_dev, mapping,
len, DMA_TO_DEVICE);
dev_kfree_skb_any(bounce_skb);
goto err_out;
}
skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
dev_consume_skb_any(skb);
skb = bounce_skb;
}
entry = bp->tx_prod;
bp->tx_buffers[entry].skb = skb;
bp->tx_buffers[entry].mapping = mapping;
ctrl = (len & DESC_CTRL_LEN);
ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
if (entry == (B44_TX_RING_SIZE -
1))
ctrl |= DESC_CTRL_EOT;
bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
if (bp->flags & B44_FLAG_TX_RING_HACK)
b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
entry *
sizeof(bp->tx_ring[
0]),
DMA_TO_DEVICE);
entry = NEXT_TX(entry);
bp->tx_prod = entry;
wmb();
bw32(bp, B44_DMATX_PTR, entry *
sizeof(
struct dma_desc));
if (bp->flags & B44_FLAG_BUGGY_TXPTR)
bw32(bp, B44_DMATX_PTR, entry *
sizeof(
struct dma_desc));
if (bp->flags & B44_FLAG_REORDER_BUG)
br32(bp, B44_DMATX_PTR);
netdev_sent_queue(dev, skb->len);
if (TX_BUFFS_AVAIL(bp) <
1)
netif_stop_queue(dev);
out_unlock:
spin_unlock_irqrestore(&bp->lock, flags);
return rc;
err_out:
rc = NETDEV_TX_BUSY;
goto out_unlock;
}
static int b44_change_mtu(
struct net_device *dev,
int new_mtu)
{
struct b44 *bp = netdev_priv(dev);
if (!netif_running(dev)) {
/* We'll just catch it later when the
* device is up'd.
*/
WRITE_ONCE(dev->mtu, new_mtu);
return 0;
}
spin_lock_irq(&bp->lock);
b44_halt(bp);
WRITE_ONCE(dev->mtu, new_mtu);
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET);
spin_unlock_irq(&bp->lock);
b44_enable_ints(bp);
return 0;
}
/* Free up pending packets in all rx/tx rings.
*
* The chip has been shut down and the driver detached from
* the networking, so no interrupts or new tx packets will
* end up in the driver. bp->lock is not held and we are not
* in an interrupt context and thus may sleep.
*/
static void b44_free_rings(
struct b44 *bp)
{
struct ring_info *rp;
int i;
for (i =
0; i < B44_RX_RING_SIZE; i++) {
rp = &bp->rx_buffers[i];
if (rp->skb == NULL)
continue;
dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
DMA_FROM_DEVICE);
dev_kfree_skb_any(rp->skb);
rp->skb = NULL;
}
/* XXX needs changes once NETIF_F_SG is set... */
for (i =
0; i < B44_TX_RING_SIZE; i++) {
rp = &bp->tx_buffers[i];
if (rp->skb == NULL)
continue;
dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
DMA_TO_DEVICE);
dev_kfree_skb_any(rp->skb);
rp->skb = NULL;
}
}
/* Initialize tx/rx rings for packet processing.
*
* The chip has been shut down and the driver detached from
* the networking, so no interrupts or new tx packets will
* end up in the driver.
*/
static void b44_init_rings(
struct b44 *bp)
{
int i;
b44_free_rings(bp);
memset(bp->rx_ring,
0, B44_RX_RING_BYTES);
memset(bp->tx_ring,
0, B44_TX_RING_BYTES);
if (bp->flags & B44_FLAG_RX_RING_HACK)
dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
if (bp->flags & B44_FLAG_TX_RING_HACK)
dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
DMA_TABLE_BYTES, DMA_TO_DEVICE);
for (i =
0; i < bp->rx_pending; i++) {
if (b44_alloc_rx_skb(bp, -
1, i) <
0)
break;
}
}
/*
* Must not be invoked with interrupt sources disabled and
* the hardware shutdown down.
*/
static void b44_free_consistent(
struct b44 *bp)
{
kfree(bp->rx_buffers);
bp->rx_buffers = NULL;
kfree(bp->tx_buffers);
bp->tx_buffers = NULL;
if (bp->rx_ring) {
if (bp->flags & B44_FLAG_RX_RING_HACK) {
dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
kfree(bp->rx_ring);
}
else
dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
bp->rx_ring, bp->rx_ring_dma);
bp->rx_ring = NULL;
bp->flags &= ~B44_FLAG_RX_RING_HACK;
}
if (bp->tx_ring) {
if (bp->flags & B44_FLAG_TX_RING_HACK) {
dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
DMA_TABLE_BYTES, DMA_TO_DEVICE);
kfree(bp->tx_ring);
}
else
dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
bp->tx_ring, bp->tx_ring_dma);
bp->tx_ring = NULL;
bp->flags &= ~B44_FLAG_TX_RING_HACK;
}
}
/*
* Must not be invoked with interrupt sources disabled and
* the hardware shutdown down. Can sleep.
*/
static int b44_alloc_consistent(
struct b44 *bp, gfp_t gfp)
{
int size;
size = B44_RX_RING_SIZE *
sizeof(
struct ring_info);
bp->rx_buffers = kzalloc(size, gfp);
if (!bp->rx_buffers)
goto out_err;
size = B44_TX_RING_SIZE *
sizeof(
struct ring_info);
bp->tx_buffers = kzalloc(size, gfp);
if (!bp->tx_buffers)
goto out_err;
size = DMA_TABLE_BYTES;
bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
&bp->rx_ring_dma, gfp);
if (!bp->rx_ring) {
/* Allocation may have failed due to dma_alloc_coherent
insisting on use of GFP_DMA, which is more restrictive
than necessary... */
struct dma_desc *rx_ring;
dma_addr_t rx_ring_dma;
rx_ring = kzalloc(size, gfp);
if (!rx_ring)
goto out_err;
rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
DMA_TABLE_BYTES,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(bp->sdev->dma_dev, rx_ring_dma) ||
rx_ring_dma + size > DMA_BIT_MASK(
30)) {
kfree(rx_ring);
goto out_err;
}
bp->rx_ring = rx_ring;
bp->rx_ring_dma = rx_ring_dma;
bp->flags |= B44_FLAG_RX_RING_HACK;
}
bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
&bp->tx_ring_dma, gfp);
if (!bp->tx_ring) {
/* Allocation may have failed due to ssb_dma_alloc_consistent
insisting on use of GFP_DMA, which is more restrictive
than necessary... */
struct dma_desc *tx_ring;
dma_addr_t tx_ring_dma;
tx_ring = kzalloc(size, gfp);
if (!tx_ring)
goto out_err;
tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
DMA_TABLE_BYTES,
DMA_TO_DEVICE);
if (dma_mapping_error(bp->sdev->dma_dev, tx_ring_dma) ||
tx_ring_dma + size > DMA_BIT_MASK(
30)) {
kfree(tx_ring);
goto out_err;
}
bp->tx_ring = tx_ring;
bp->tx_ring_dma = tx_ring_dma;
bp->flags |= B44_FLAG_TX_RING_HACK;
}
return 0;
out_err:
b44_free_consistent(bp);
return -ENOMEM;
}
/* bp->lock is held. */
static void b44_clear_stats(
struct b44 *bp)
{
unsigned long reg;
bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg +=
4UL)
br32(bp, reg);
for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg +=
4UL)
br32(bp, reg);
}
/* bp->lock is held. */
static void b44_chip_reset(
struct b44 *bp,
int reset_kind)
{
struct ssb_device *sdev = bp->sdev;
bool was_enabled;
was_enabled = ssb_device_is_enabled(bp->sdev);
ssb_device_enable(bp->sdev,
0);
ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
if (was_enabled) {
bw32(bp, B44_RCV_LAZY,
0);
bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE,
200,
1);
bw32(bp, B44_DMATX_CTRL,
0);
bp->tx_prod = bp->tx_cons =
0;
if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
100,
0);
}
bw32(bp, B44_DMARX_CTRL,
0);
bp->rx_prod = bp->rx_cons =
0;
}
b44_clear_stats(bp);
/*
* Don't enable PHY if we are doing a partial reset
* we are probably going to power down
*/
if (reset_kind == B44_CHIP_RESET_PARTIAL)
return;
switch (sdev->bus->bustype) {
case SSB_BUSTYPE_SSB:
bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
(DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus),
B44_MDC_RATIO)
& MDIO_CTRL_MAXF_MASK)));
break;
case SSB_BUSTYPE_PCI:
bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
(
0x0d & MDIO_CTRL_MAXF_MASK)));
break;
case SSB_BUSTYPE_PCMCIA:
case SSB_BUSTYPE_SDIO:
WARN_ON(
1);
/* A device with this bus does not exist. */
break;
}
br32(bp, B44_MDIO_CTRL);
if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
br32(bp, B44_ENET_CTRL);
bp->flags |= B44_FLAG_EXTERNAL_PHY;
}
else {
u32 val = br32(bp, B44_DEVCTRL);
if (val & DEVCTRL_EPR) {
bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
br32(bp, B44_DEVCTRL);
udelay(
100);
}
bp->flags &= ~B44_FLAG_EXTERNAL_PHY;
}
}
/* bp->lock is held. */
static void b44_halt(
struct b44 *bp)
{
b44_disable_ints(bp);
/* reset PHY */
b44_phy_reset(bp);
/* power down PHY */
netdev_info(bp->dev,
"powering down PHY\n");
bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
/* now reset the chip, but without enabling the MAC&PHY
* part of it. This has to be done _after_ we shut down the PHY */
if (bp->flags & B44_FLAG_EXTERNAL_PHY)
b44_chip_reset(bp, B44_CHIP_RESET_FULL);
else
b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
}
/* bp->lock is held. */
static void __b44_set_mac_addr(
struct b44 *bp)
{
bw32(bp, B44_CAM_CTRL,
0);
if (!(bp->dev->flags & IFF_PROMISC)) {
u32 val;
__b44_cam_write(bp, bp->dev->dev_addr,
0);
val = br32(bp, B44_CAM_CTRL);
bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
}
}
static int b44_set_mac_addr(
struct net_device *dev,
void *p)
{
struct b44 *bp = netdev_priv(dev);
struct sockaddr *addr = p;
u32 val;
if (netif_running(dev))
return -EBUSY;
if (!is_valid_ether_addr(addr->sa_data))
return -EINVAL;
eth_hw_addr_set(dev, addr->sa_data);
spin_lock_irq(&bp->lock);
val = br32(bp, B44_RXCONFIG);
if (!(val & RXCONFIG_CAM_ABSENT))
__b44_set_mac_addr(bp);
spin_unlock_irq(&bp->lock);
return 0;
}
/* Called at device open time to get the chip ready for
* packet processing. Invoked with bp->lock held.
*/
static void __b44_set_rx_mode(
struct net_device *);
static void b44_init_hw(
struct b44 *bp,
int reset_kind)
{
u32 val;
b44_chip_reset(bp, B44_CHIP_RESET_FULL);
if (reset_kind == B44_FULL_RESET) {
b44_phy_reset(bp);
b44_setup_phy(bp);
}
/* Enable CRC32, set proper LED modes and power on PHY */
bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
bw32(bp, B44_RCV_LAZY, (
1 << RCV_LAZY_FC_SHIFT));
/* This sets the MAC address too. */
__b44_set_rx_mode(bp->dev);
/* MTU + eth header + possible VLAN tag + struct rx_header */
bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN +
8 + RX_HEADER_LEN);
bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN +
8 + RX_HEADER_LEN);
bw32(bp, B44_TX_WMARK,
56);
/* XXX magic */
if (reset_kind == B44_PARTIAL_RESET) {
bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
(RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
}
else {
bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
(RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
bw32(bp, B44_DMARX_PTR, bp->rx_pending);
bp->rx_prod = bp->rx_pending;
bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
}
val = br32(bp, B44_ENET_CTRL);
bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
netdev_reset_queue(bp->dev);
}
static int b44_open(
struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
int err;
err = b44_alloc_consistent(bp, GFP_KERNEL);
if (err)
goto out;
napi_enable(&bp->napi);
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET);
b44_check_phy(bp);
err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
if (unlikely(err <
0)) {
napi_disable(&bp->napi);
b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
b44_free_rings(bp);
b44_free_consistent(bp);
goto out;
}
timer_setup(&bp->timer, b44_timer,
0);
bp->timer.expires = jiffies + HZ;
add_timer(&bp->timer);
b44_enable_ints(bp);
if (bp->flags & B44_FLAG_EXTERNAL_PHY)
phy_start(dev->phydev);
netif_start_queue(dev);
out:
return err;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
/*
* Polling receive - used by netconsole and other diagnostic tools
* to allow network i/o with interrupts disabled.
*/
static void b44_poll_controller(
struct net_device *dev)
{
disable_irq(dev->irq);
b44_interrupt(dev->irq, dev);
enable_irq(dev->irq);
}
#endif
static void bwfilter_table(
struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
{
u32 i;
u32 *pattern = (u32 *) pp;
for (i =
0; i < bytes; i +=
sizeof(u32)) {
bw32(bp, B44_FILT_ADDR, table_offset + i);
bw32(bp, B44_FILT_DATA, pattern[i /
sizeof(u32)]);
}
}
static int b44_magic_pattern(
const u8 *macaddr, u8 *ppattern, u8 *pmask,
int offset)
{
int magicsync =
6;
int k, j, len = offset;
int ethaddr_bytes = ETH_ALEN;
memset(ppattern + offset,
0xff, magicsync);
for (j =
0; j < magicsync; j++) {
pmask[len >>
3] |= BIT(len &
7);
len++;
}
for (j =
0; j < B44_MAX_PATTERNS; j++) {
if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
ethaddr_bytes = ETH_ALEN;
else
ethaddr_bytes = B44_PATTERN_SIZE - len;
if (ethaddr_bytes <=
0)
break;
for (k =
0; k< ethaddr_bytes; k++) {
ppattern[offset + magicsync +
(j * ETH_ALEN) + k] = macaddr[k];
pmask[len >>
3] |= BIT(len &
7);
len++;
}
}
return len -
1;
}
/* Setup magic packet patterns in the b44 WOL
* pattern matching filter.
*/
static void b44_setup_pseudo_magicp(
struct b44 *bp)
{
u32 val;
int plen0, plen1, plen2;
u8 *pwol_pattern;
u8 pwol_mask[B44_PMASK_SIZE];
pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
if (!pwol_pattern)
return;
/* Ipv4 magic packet pattern - pattern 0.*/
memset(pwol_mask,
0, B44_PMASK_SIZE);
plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
B44_ETHIPV4UDP_HLEN);
bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
/* Raw ethernet II magic packet pattern - pattern 1 */
memset(pwol_pattern,
0, B44_PATTERN_SIZE);
memset(pwol_mask,
0, B44_PMASK_SIZE);
plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
ETH_HLEN);
bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
B44_PATTERN_BASE + B44_PATTERN_SIZE);
bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
B44_PMASK_BASE + B44_PMASK_SIZE);
/* Ipv6 magic packet pattern - pattern 2 */
memset(pwol_pattern,
0, B44_PATTERN_SIZE);
memset(pwol_mask,
0, B44_PMASK_SIZE);
plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
B44_ETHIPV6UDP_HLEN);
bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
kfree(pwol_pattern);
/* set these pattern's lengths: one less than each real length */
val = plen0 | (plen1 <<
8) | (plen2 <<
16) | WKUP_LEN_ENABLE_THREE;
bw32(bp, B44_WKUP_LEN, val);
/* enable wakeup pattern matching */
val = br32(bp, B44_DEVCTRL);
bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
}
#ifdef CONFIG_B44_PCI
static void b44_setup_wol_pci(
struct b44 *bp)
{
u16 val;
if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
}
}
#else
static inline void b44_setup_wol_pci(
struct b44 *bp) { }
#endif /* CONFIG_B44_PCI */
static void b44_setup_wol(
struct b44 *bp)
{
u32 val;
bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
if (bp->flags & B44_FLAG_B0_ANDLATER) {
bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
val = bp->dev->dev_addr[
2] <<
24 |
bp->dev->dev_addr[
3] <<
16 |
bp->dev->dev_addr[
4] <<
8 |
bp->dev->dev_addr[
5];
bw32(bp, B44_ADDR_LO, val);
val = bp->dev->dev_addr[
0] <<
8 |
bp->dev->dev_addr[
1];
bw32(bp, B44_ADDR_HI, val);
val = br32(bp, B44_DEVCTRL);
bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
}
else {
b44_setup_pseudo_magicp(bp);
}
b44_setup_wol_pci(bp);
}
static int b44_close(
struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
netif_stop_queue(dev);
if (bp->flags & B44_FLAG_EXTERNAL_PHY)
phy_stop(dev->phydev);
napi_disable(&bp->napi);
timer_delete_sync(&bp->timer);
spin_lock_irq(&bp->lock);
b44_halt(bp);
b44_free_rings(bp);
netif_carrier_off(dev);
spin_unlock_irq(&bp->lock);
free_irq(dev->irq, dev);
if (bp->flags & B44_FLAG_WOL_ENABLE) {
b44_init_hw(bp, B44_PARTIAL_RESET);
b44_setup_wol(bp);
}
b44_free_consistent(bp);
return 0;
}
static void b44_get_stats64(
struct net_device *dev,
struct rtnl_link_stats64 *nstat)
{
struct b44 *bp = netdev_priv(dev);
struct b44_hw_stats *hwstat = &bp->hw_stats;
unsigned int start;
do {
start = u64_stats_fetch_begin(&hwstat->syncp);
/* Convert HW stats into rtnl_link_stats64 stats. */
nstat->rx_packets = hwstat->rx_pkts;
nstat->tx_packets = hwstat->tx_pkts;
nstat->rx_bytes = hwstat->rx_octets;
nstat->tx_bytes = hwstat->tx_octets;
nstat->tx_errors = (hwstat->tx_jabber_pkts +
hwstat->tx_oversize_pkts +
hwstat->tx_underruns +
hwstat->tx_excessive_cols +
hwstat->tx_late_cols);
nstat->multicast = hwstat->rx_multicast_pkts;
nstat->collisions = hwstat->tx_total_cols;
nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
hwstat->rx_undersize);
nstat->rx_over_errors = hwstat->rx_missed_pkts;
nstat->rx_frame_errors = hwstat->rx_align_errs;
nstat->rx_crc_errors = hwstat->rx_crc_errs;
nstat->rx_errors = (hwstat->rx_jabber_pkts +
hwstat->rx_oversize_pkts +
hwstat->rx_missed_pkts +
hwstat->rx_crc_align_errs +
hwstat->rx_undersize +
hwstat->rx_crc_errs +
hwstat->rx_align_errs +
hwstat->rx_symbol_errs);
nstat->tx_aborted_errors = hwstat->tx_underruns;
#if 0
/* Carrier lost counter seems to be broken for some devices */
nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
#endif
}
while (u64_stats_fetch_retry(&hwstat->syncp, start));
}
static int __b44_load_mcast(
struct b44 *bp,
struct net_device *dev)
{
struct netdev_hw_addr *ha;
int i, num_ents;
num_ents = min_t(
int, netdev_mc_count(dev), B44_MCAST_TABLE_SIZE);
i =
0;
netdev_for_each_mc_addr(ha, dev) {
if (i == num_ents)
break;
__b44_cam_write(bp, ha->addr, i++ +
1);
}
return i+
1;
}
static void __b44_set_rx_mode(
struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
u32 val;
val = br32(bp, B44_RXCONFIG);
val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
val |= RXCONFIG_PROMISC;
bw32(bp, B44_RXCONFIG, val);
}
else {
unsigned char zero[
6] = {
0,
0,
0,
0,
0,
0};
int i =
1;
__b44_set_mac_addr(bp);
if ((dev->flags & IFF_ALLMULTI) ||
(netdev_mc_count(dev) > B44_MCAST_TABLE_SIZE))
val |= RXCONFIG_ALLMULTI;
else
i = __b44_load_mcast(bp, dev);
for (; i <
64; i++)
__b44_cam_write(bp, zero, i);
bw32(bp, B44_RXCONFIG, val);
val = br32(bp, B44_CAM_CTRL);
bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
}
}
static void b44_set_rx_mode(
struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
spin_lock_irq(&bp->lock);
__b44_set_rx_mode(dev);
spin_unlock_irq(&bp->lock);
}
static u32 b44_get_msglevel(
struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
return bp->msg_enable;
}
static void b44_set_msglevel(
struct net_device *dev, u32 value)
{
struct b44 *bp = netdev_priv(dev);
bp->msg_enable = value;
}
static void b44_get_drvinfo (
struct net_device *dev,
struct ethtool_drvinfo *info)
{
struct b44 *bp = netdev_priv(dev);
struct ssb_bus *bus = bp->sdev->bus;
strscpy(info->driver, DRV_MODULE_NAME,
sizeof(info->driver));
switch (bus->bustype) {
case SSB_BUSTYPE_PCI:
strscpy(info->bus_info, pci_name(bus->host_pci),
sizeof(info->bus_info));
break;
case SSB_BUSTYPE_SSB:
strscpy(info->bus_info,
"SSB",
sizeof(info->bus_info));
break;
case SSB_BUSTYPE_PCMCIA:
case SSB_BUSTYPE_SDIO:
WARN_ON(
1);
/* A device with this bus does not exist. */
break;
}
}
static int b44_nway_reset(
struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
u32 bmcr;
int r;
spin_lock_irq(&bp->lock);
b44_readphy(bp, MII_BMCR, &bmcr);
b44_readphy(bp, MII_BMCR, &bmcr);
r = -EINVAL;
if (bmcr & BMCR_ANENABLE)
r = b44_writephy(bp, MII_BMCR,
bmcr | BMCR_ANRESTART);
spin_unlock_irq(&bp->lock);
return r;
}
static int b44_get_link_ksettings(
struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct b44 *bp = netdev_priv(dev);
u32 supported, advertising;
if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
BUG_ON(!dev->phydev);
phy_ethtool_ksettings_get(dev->phydev, cmd);
return 0;
}
supported = (SUPPORTED_Autoneg);
supported |= (SUPPORTED_100baseT_Half |
SUPPORTED_100baseT_Full |
SUPPORTED_10baseT_Half |
SUPPORTED_10baseT_Full |
SUPPORTED_MII);
advertising =
0;
if (bp->flags & B44_FLAG_ADV_10HALF)
advertising |= ADVERTISED_10baseT_Half;
if (bp->flags & B44_FLAG_ADV_10FULL)
advertising |= ADVERTISED_10baseT_Full;
if (bp->flags & B44_FLAG_ADV_100HALF)
advertising |= ADVERTISED_100baseT_Half;
if (bp->flags & B44_FLAG_ADV_100FULL)
advertising |= ADVERTISED_100baseT_Full;
advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
cmd->base.speed = (bp->flags & B44_FLAG_100_BASE_T) ?
SPEED_100 : SPEED_10;
cmd->base.duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
DUPLEX_FULL : DUPLEX_HALF;
cmd->base.port =
0;
cmd->base.phy_address = bp->phy_addr;
cmd->base.autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
AUTONEG_DISABLE : AUTONEG_ENABLE;
if (cmd->base.autoneg == AUTONEG_ENABLE)
advertising |= ADVERTISED_Autoneg;
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
supported);
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
advertising);
if (!netif_running(dev)){
cmd->base.speed =
0;
cmd->base.duplex =
0xff;
}
return 0;
}
static int b44_set_link_ksettings(
struct net_device *dev,
const struct ethtool_link_ksettings *cmd)
{
struct b44 *bp = netdev_priv(dev);
u32 speed;
int ret;
u32 advertising;
if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
BUG_ON(!dev->phydev);
spin_lock_irq(&bp->lock);
if (netif_running(dev))
b44_setup_phy(bp);
ret = phy_ethtool_ksettings_set(dev->phydev, cmd);
spin_unlock_irq(&bp->lock);
return ret;
}
speed = cmd->base.speed;
ethtool_convert_link_mode_to_legacy_u32(&advertising,
cmd->link_modes.advertising);
/* We do not support gigabit. */
if (cmd->base.autoneg == AUTONEG_ENABLE) {
if (advertising &
(ADVERTISED_1000baseT_Half |
ADVERTISED_1000baseT_Full))
return -EINVAL;
}
else if ((speed != SPEED_100 &&
speed != SPEED_10) ||
(cmd->base.duplex != DUPLEX_HALF &&
cmd->base.duplex != DUPLEX_FULL)) {
return -EINVAL;
}
spin_lock_irq(&bp->lock);
if (cmd->base.autoneg == AUTONEG_ENABLE) {
bp->flags &= ~(B44_FLAG_FORCE_LINK |
B44_FLAG_100_BASE_T |
B44_FLAG_FULL_DUPLEX |
B44_FLAG_ADV_10HALF |
B44_FLAG_ADV_10FULL |
B44_FLAG_ADV_100HALF |
B44_FLAG_ADV_100FULL);
if (advertising ==
0) {
bp->flags |= (B44_FLAG_ADV_10HALF |
B44_FLAG_ADV_10FULL |
B44_FLAG_ADV_100HALF |
B44_FLAG_ADV_100FULL);
}
else {
if (advertising & ADVERTISED_10baseT_Half)
bp->flags |= B44_FLAG_ADV_10HALF;
if (advertising & ADVERTISED_10baseT_Full)
bp->flags |= B44_FLAG_ADV_10FULL;
if (advertising & ADVERTISED_100baseT_Half)
bp->flags |= B44_FLAG_ADV_100HALF;
if (advertising & ADVERTISED_100baseT_Full)
bp->flags |= B44_FLAG_ADV_100FULL;
}
}
else {
bp->flags |= B44_FLAG_FORCE_LINK;
bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
if (speed == SPEED_100)
bp->flags |= B44_FLAG_100_BASE_T;
if (cmd->base.duplex == DUPLEX_FULL)
bp->flags |= B44_FLAG_FULL_DUPLEX;
}
if (netif_running(dev))
b44_setup_phy(bp);
spin_unlock_irq(&bp->lock);
return 0;
}
static void b44_get_ringparam(
struct net_device *dev,
struct ethtool_ringparam *ering,
struct kernel_ethtool_ringparam *kernel_ering,
struct netlink_ext_ack *extack)
{
struct b44 *bp = netdev_priv(dev);
ering->rx_max_pending = B44_RX_RING_SIZE -
1;
ering->rx_pending = bp->rx_pending;
/* XXX ethtool lacks a tx_max_pending, oops... */
}
static int b44_set_ringparam(
struct net_device *dev,
struct ethtool_ringparam *ering,
struct kernel_ethtool_ringparam *kernel_ering,
struct netlink_ext_ack *extack)
{
struct b44 *bp = netdev_priv(dev);
if ((ering->rx_pending > B44_RX_RING_SIZE -
1) ||
(ering->rx_mini_pending !=
0) ||
(ering->rx_jumbo_pending !=
0) ||
(ering->tx_pending > B44_TX_RING_SIZE -
1))
return -EINVAL;
spin_lock_irq(&bp->lock);
bp->rx_pending = ering->rx_pending;
bp->tx_pending = ering->tx_pending;
b44_halt(bp);
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET);
netif_wake_queue(bp->dev);
spin_unlock_irq(&bp->lock);
b44_enable_ints(bp);
return 0;
}
static void b44_get_pauseparam(
struct net_device *dev,
struct ethtool_pauseparam *epause)
{
struct b44 *bp = netdev_priv(dev);
epause->autoneg =
(bp->flags & B44_FLAG_PAUSE_AUTO) !=
0;
epause->rx_pause =
(bp->flags & B44_FLAG_RX_PAUSE) !=
0;
epause->tx_pause =
(bp->flags & B44_FLAG_TX_PAUSE) !=
0;
}
static int b44_set_pauseparam(
struct net_device *dev,
struct ethtool_pauseparam *epause)
{
struct b44 *bp = netdev_priv(dev);
spin_lock_irq(&bp->lock);
if (epause->autoneg)
bp->flags |= B44_FLAG_PAUSE_AUTO;
else
bp->flags &= ~B44_FLAG_PAUSE_AUTO;
if (epause->rx_pause)
bp->flags |= B44_FLAG_RX_PAUSE;
else
bp->flags &= ~B44_FLAG_RX_PAUSE;
if (epause->tx_pause)
bp->flags |= B44_FLAG_TX_PAUSE;
else
bp->flags &= ~B44_FLAG_TX_PAUSE;
if (netif_running(dev)) {
if (bp->flags & B44_FLAG_PAUSE_AUTO) {
b44_halt(bp);
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET);
}
else {
__b44_set_flow_ctrl(bp, bp->flags);
}
}
spin_unlock_irq(&bp->lock);
b44_enable_ints(bp);
return 0;
}
static void b44_get_strings(
struct net_device *dev, u32 stringset, u8 *data)
{
switch(stringset) {
case ETH_SS_STATS:
memcpy(data, *b44_gstrings,
sizeof(b44_gstrings));
break;
}
}
static int b44_get_sset_count(
struct net_device *dev,
int sset)
{
switch (sset) {
case ETH_SS_STATS:
return ARRAY_SIZE(b44_gstrings);
default:
return -EOPNOTSUPP;
}
}
static void b44_get_ethtool_stats(
struct net_device *dev,
struct ethtool_stats *stats, u64 *data)
{
struct b44 *bp = netdev_priv(dev);
struct b44_hw_stats *hwstat = &bp->hw_stats;
u64 *data_src, *data_dst;
unsigned int start;
u32 i;
spin_lock_irq(&bp->lock);
b44_stats_update(bp);
spin_unlock_irq(&bp->lock);
do {
data_src = &hwstat->tx_good_octets;
data_dst = data;
start = u64_stats_fetch_begin(&hwstat->syncp);
for (i =
0; i < ARRAY_SIZE(b44_gstrings); i++)
*data_dst++ = *data_src++;
}
while (u64_stats_fetch_retry(&hwstat->syncp, start));
}
static void b44_get_wol(
struct net_device *dev,
struct ethtool_wolinfo *wol)
{
struct b44 *bp = netdev_priv(dev);
wol->supported = WAKE_MAGIC;
if (bp->flags & B44_FLAG_WOL_ENABLE)
wol->wolopts = WAKE_MAGIC;
else
wol->wolopts =
0;
memset(&wol->sopass,
0,
sizeof(wol->sopass));
}
static int b44_set_wol(
struct net_device *dev,
struct ethtool_wolinfo *wol)
{
struct b44 *bp = netdev_priv(dev);
spin_lock_irq(&bp->lock);
if (wol->wolopts & WAKE_MAGIC)
bp->flags |= B44_FLAG_WOL_ENABLE;
else
bp->flags &= ~B44_FLAG_WOL_ENABLE;
spin_unlock_irq(&bp->lock);
device_set_wakeup_enable(bp->sdev->dev, wol->wolopts & WAKE_MAGIC);
return 0;
}
static const struct ethtool_ops b44_ethtool_ops = {
.get_drvinfo = b44_get_drvinfo,
.nway_reset = b44_nway_reset,
.get_link = ethtool_op_get_link,
.get_wol = b44_get_wol,
.set_wol = b44_set_wol,
.get_ringparam = b44_get_ringparam,
.set_ringparam = b44_set_ringparam,
.get_pauseparam = b44_get_pauseparam,
.set_pauseparam = b44_set_pauseparam,
.get_msglevel = b44_get_msglevel,
.set_msglevel = b44_set_msglevel,
.get_strings = b44_get_strings,
.get_sset_count = b44_get_sset_count,
.get_ethtool_stats = b44_get_ethtool_stats,
.get_link_ksettings = b44_get_link_ksettings,
.set_link_ksettings = b44_set_link_ksettings,
};
static int b44_ioctl(
struct net_device *dev,
struct ifreq *ifr,
int cmd)
{
struct b44 *bp = netdev_priv(dev);
int err = -EINVAL;
if (!netif_running(dev))
goto out;
spin_lock_irq(&bp->lock);
if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
BUG_ON(!dev->phydev);
err = phy_mii_ioctl(dev->phydev, ifr, cmd);
}
else {
err = generic_mii_ioctl(&bp->mii_if, if_mii(ifr), cmd, NULL);
}
spin_unlock_irq(&bp->lock);
out:
return err;
}
static int b44_get_invariants(
struct b44 *bp)
{
struct ssb_device *sdev = bp->sdev;
int err =
0;
u8 *addr;
bp->dma_offset = ssb_dma_translation(sdev);
if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
instance >
1) {
addr = sdev->bus->sprom.et1mac;
bp->phy_addr = sdev->bus->sprom.et1phyaddr;
}
else {
addr = sdev->bus->sprom.et0mac;
bp->phy_addr = sdev->bus->sprom.et0phyaddr;
}
/* Some ROMs have buggy PHY addresses with the high
* bits set (sign extension?). Truncate them to a
* valid PHY address. */
bp->phy_addr &=
0x1F;
eth_hw_addr_set(bp->dev, addr);
if (!is_valid_ether_addr(&bp->dev->dev_addr[
0])){
pr_err(
"Invalid MAC address found in EEPROM\n");
return -EINVAL;
}
bp->imask = IMASK_DEF;
/* XXX - really required?
bp->flags |= B44_FLAG_BUGGY_TXPTR;
*/
if (bp->sdev->id.revision >=
7)
bp->flags |= B44_FLAG_B0_ANDLATER;
return err;
}
static const struct net_device_ops b44_netdev_ops = {
.ndo_open = b44_open,
.ndo_stop = b44_close,
.ndo_start_xmit = b44_start_xmit,
.ndo_get_stats64 = b44_get_stats64,
.ndo_set_rx_mode = b44_set_rx_mode,
.ndo_set_mac_address = b44_set_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_eth_ioctl = b44_ioctl,
.ndo_tx_timeout = b44_tx_timeout,
.ndo_change_mtu = b44_change_mtu,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = b44_poll_controller,
#endif
};
static void b44_adjust_link(
struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
struct phy_device *phydev = dev->phydev;
bool status_changed =
false;
BUG_ON(!phydev);
if (bp->old_link != phydev->link) {
status_changed =
true;
bp->old_link = phydev->link;
}
/* reflect duplex change */
if (phydev->link) {
if ((phydev->duplex == DUPLEX_HALF) &&
(bp->flags & B44_FLAG_FULL_DUPLEX)) {
status_changed =
true;
bp->flags &= ~B44_FLAG_FULL_DUPLEX;
}
else if ((phydev->duplex == DUPLEX_FULL) &&
!(bp->flags & B44_FLAG_FULL_DUPLEX)) {
status_changed =
true;
bp->flags |= B44_FLAG_FULL_DUPLEX;
}
}
if (status_changed) {
u32 val = br32(bp, B44_TX_CTRL);
if (bp->flags & B44_FLAG_FULL_DUPLEX)
val |= TX_CTRL_DUPLEX;
else
val &= ~TX_CTRL_DUPLEX;
bw32(bp, B44_TX_CTRL, val);
phy_print_status(phydev);
}
}
static int b44_register_phy_one(
struct b44 *bp)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = {
0, };
struct mii_bus *mii_bus;
struct ssb_device *sdev = bp->sdev;
struct phy_device *phydev;
char bus_id[MII_BUS_ID_SIZE +
3];
struct ssb_sprom *sprom = &sdev->bus->sprom;
int err;
mii_bus = mdiobus_alloc();
if (!mii_bus) {
dev_err(sdev->dev,
"mdiobus_alloc() failed\n");
err = -ENOMEM;
goto err_out;
}
mii_bus->priv = bp;
mii_bus->read = b44_mdio_read_phylib;
mii_bus->write = b44_mdio_write_phylib;
mii_bus->name =
"b44_eth_mii";
mii_bus->parent = sdev->dev;
mii_bus->phy_mask = ~(
1 << bp->phy_addr);
snprintf(mii_bus->id, MII_BUS_ID_SIZE,
"%x", instance);
bp->mii_bus = mii_bus;
err = mdiobus_register(mii_bus);
if (err) {
dev_err(sdev->dev,
"failed to register MII bus\n");
goto err_out_mdiobus;
}
if (!mdiobus_is_registered_device(bp->mii_bus, bp->phy_addr) &&
(sprom->boardflags_lo & (B44_BOARDFLAG_ROBO | B44_BOARDFLAG_ADM))) {
dev_info(sdev->dev,
"could not find PHY at %i, use fixed one\n",
bp->phy_addr);
bp->phy_addr =
0;
snprintf(bus_id,
sizeof(bus_id), PHY_ID_FMT,
"fixed-0",
bp->phy_addr);
}
else {
snprintf(bus_id,
sizeof(bus_id), PHY_ID_FMT, mii_bus->id,
bp->phy_addr);
}
phydev = phy_connect(bp->dev, bus_id, &b44_adjust_link,
PHY_INTERFACE_MODE_MII);
if (IS_ERR(phydev)) {
dev_err(sdev->dev,
"could not attach PHY at %i\n",
bp->phy_addr);
err = PTR_ERR(phydev);
goto err_out_mdiobus_unregister;
}
/* mask with MAC supported features */
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, mask);
linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, mask);
linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, mask);
linkmode_set_bit(ETHTOOL_LINK_MODE_MII_BIT, mask);
linkmode_and(phydev->supported, phydev->supported, mask);
linkmode_copy(phydev->advertising, phydev->supported);
bp->old_link =
0;
bp->phy_addr = phydev->mdio.addr;
phy_attached_info(phydev);
return 0;
err_out_mdiobus_unregister:
mdiobus_unregister(mii_bus);
err_out_mdiobus:
mdiobus_free(mii_bus);
err_out:
return err;
}
static void b44_unregister_phy_one(
struct b44 *bp)
{
struct net_device *dev = bp->dev;
struct mii_bus *mii_bus = bp->mii_bus;
phy_disconnect(dev->phydev);
mdiobus_unregister(mii_bus);
mdiobus_free(mii_bus);
}
static int b44_init_one(
struct ssb_device *sdev,
const struct ssb_device_id *ent)
{
struct net_device *dev;
struct b44 *bp;
int err;
instance++;
dev = alloc_etherdev(
sizeof(*bp));
if (!dev) {
err = -ENOMEM;
goto out;
}
SET_NETDEV_DEV(dev, sdev->dev);
/* No interesting netdevice features in this card... */
dev->features |=
0;
bp = netdev_priv(dev);
bp->sdev = sdev;
bp->dev = dev;
bp->force_copybreak =
0;
bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
spin_lock_init(&bp->lock);
u64_stats_init(&bp->hw_stats.syncp);
bp->rx_pending = B44_DEF_RX_RING_PENDING;
bp->tx_pending = B44_DEF_TX_RING_PENDING;
dev->netdev_ops = &b44_netdev_ops;
netif_napi_add(dev, &bp->napi, b44_poll);
dev->watchdog_timeo = B44_TX_TIMEOUT;
dev->min_mtu = B44_MIN_MTU;
dev->max_mtu = B44_MAX_MTU;
dev->irq = sdev->irq;
dev->ethtool_ops = &b44_ethtool_ops;
err = ssb_bus_powerup(sdev->bus,
0);
if (err) {
dev_err(sdev->dev,
"Failed to powerup the bus\n");
goto err_out_free_dev;
}
err = dma_set_mask_and_coherent(sdev->dma_dev, DMA_BIT_MASK(
30));
if (err) {
dev_err(sdev->dev,
"Required 30BIT DMA mask unsupported by the system\n");
goto err_out_powerdown;
}
err = b44_get_invariants(bp);
if (err) {
dev_err(sdev->dev,
"Problem fetching invariants of chip, aborting\n");
goto err_out_powerdown;
}
if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
dev_err(sdev->dev,
"No PHY present on this MAC, aborting\n");
err = -ENODEV;
goto err_out_powerdown;
}
bp->mii_if.dev = dev;
bp->mii_if.mdio_read = b44_mdio_read_mii;
bp->mii_if.mdio_write = b44_mdio_write_mii;
bp->mii_if.phy_id = bp->phy_addr;
bp->mii_if.phy_id_mask =
0x1f;
bp->mii_if.reg_num_mask =
0x1f;
/* By default, advertise all speed/duplex settings. */
bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
/* By default, auto-negotiate PAUSE. */
bp->flags |= B44_FLAG_PAUSE_AUTO;
err = register_netdev(dev);
if (err) {
dev_err(sdev->dev,
"Cannot register net device, aborting\n");
goto err_out_powerdown;
}
netif_carrier_off(dev);
ssb_set_drvdata(sdev, dev);
/* Chip reset provides power to the b44 MAC & PCI cores, which
* is necessary for MAC register access.
*/
b44_chip_reset(bp, B44_CHIP_RESET_FULL);
/* do a phy reset to test if there is an active phy */
err = b44_phy_reset(bp);
if (err <
0) {
dev_err(sdev->dev,
"phy reset failed\n");
goto err_out_unregister_netdev;
}
if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
err = b44_register_phy_one(bp);
if (err) {
dev_err(sdev->dev,
"Cannot register PHY, aborting\n");
goto err_out_unregister_netdev;
}
}
device_set_wakeup_capable(sdev->dev,
true);
netdev_info(dev,
"%s %pM\n", DRV_DESCRIPTION, dev->dev_addr);
return 0;
err_out_unregister_netdev:
unregister_netdev(dev);
err_out_powerdown:
ssb_bus_may_powerdown(sdev->bus);
err_out_free_dev:
netif_napi_del(&bp->napi);
free_netdev(dev);
out:
return err;
}
static void b44_remove_one(
struct ssb_device *sdev)
{
struct net_device *dev = ssb_get_drvdata(sdev);
struct b44 *bp = netdev_priv(dev);
unregister_netdev(dev);
if (bp->flags & B44_FLAG_EXTERNAL_PHY)
b44_unregister_phy_one(bp);
ssb_device_disable(sdev,
0);
ssb_bus_may_powerdown(sdev->bus);
netif_napi_del(&bp->napi);
free_netdev(dev);
ssb_pcihost_set_power_state(sdev, PCI_D3hot);
ssb_set_drvdata(sdev, NULL);
}
static int b44_suspend(
struct ssb_device *sdev, pm_message_t state)
{
struct net_device *dev = ssb_get_drvdata(sdev);
struct b44 *bp = netdev_priv(dev);
if (!netif_running(dev))
return 0;
timer_delete_sync(&bp->timer);
spin_lock_irq(&bp->lock);
b44_halt(bp);
netif_carrier_off(bp->dev);
netif_device_detach(bp->dev);
b44_free_rings(bp);
spin_unlock_irq(&bp->lock);
free_irq(dev->irq, dev);
if (bp->flags & B44_FLAG_WOL_ENABLE) {
b44_init_hw(bp, B44_PARTIAL_RESET);
b44_setup_wol(bp);
}
ssb_pcihost_set_power_state(sdev, PCI_D3hot);
return 0;
}
static int b44_resume(
struct ssb_device *sdev)
{
struct net_device *dev = ssb_get_drvdata(sdev);
struct b44 *bp = netdev_priv(dev);
int rc =
0;
rc = ssb_bus_powerup(sdev->bus,
0);
if (rc) {
dev_err(sdev->dev,
"Failed to powerup the bus\n");
return rc;
}
if (!netif_running(dev))
return 0;
spin_lock_irq(&bp->lock);
b44_init_rings(bp);
b44_init_hw(bp, B44_FULL_RESET);
spin_unlock_irq(&bp->lock);
/*
* As a shared interrupt, the handler can be called immediately. To be
* able to check the interrupt status the hardware must already be
* powered back on (b44_init_hw).
*/
rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
if (rc) {
netdev_err(dev,
"request_irq failed\n");
spin_lock_irq(&bp->lock);
b44_halt(bp);
b44_free_rings(bp);
spin_unlock_irq(&bp->lock);
return rc;
}
netif_device_attach(bp->dev);
b44_enable_ints(bp);
netif_wake_queue(dev);
mod_timer(&bp->timer, jiffies +
1);
return 0;
}
static struct ssb_driver b44_ssb_driver = {
.name = DRV_MODULE_NAME,
.id_table = b44_ssb_tbl,
.probe = b44_init_one,
.remove = b44_remove_one,
.suspend = b44_suspend,
.resume = b44_resume,
};
static inline int __init b44_pci_init(
void)
{
int err =
0;
#ifdef CONFIG_B44_PCI
err = ssb_pcihost_register(&b44_pci_driver);
#endif
return err;
}
static inline void b44_pci_exit(
void)
{
#ifdef CONFIG_B44_PCI
ssb_pcihost_unregister(&b44_pci_driver);
#endif
}
static int __init b44_init(
void)
{
unsigned int dma_desc_align_size = dma_get_cache_alignment();
int err;
/* Setup parameters for syncing RX/TX DMA descriptors */
dma_desc_sync_size = max_t(
unsigned int, dma_desc_align_size,
sizeof(
struct dma_desc))
;
err = b44_pci_init();
if (err)
return err;
err = ssb_driver_register(&b44_ssb_driver);
if (err)
b44_pci_exit();
return err;
}
static void __exit b44_cleanup(void)
{
ssb_driver_unregister(&b44_ssb_driver);
b44_pci_exit();
}
module_init(b44_init);
module_exit(b44_cleanup);
