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linux/drivers/net/b44.c
Andi Kleen 639b421b91 [PATCH] x86_64: Check for bad dma address in b44 1GB DMA workaround 
Needed for interaction with the nommu code in x86-64 which
will return bad_dma_address if the address exceeds dma_mask.

Cc: netdev@vger.kernel.org
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-16 07:59:31 -07:00

2168 lines
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/* b44.c: Broadcom 4400 device driver.
*
* Copyright (C) 2002 David S. Miller (davem@redhat.com)
* Fixed by Pekka Pietikainen (pp@ee.oulu.fi)
* Copyright (C) 2006 Broadcom Corporation.
*
* Distribute under GPL.
*/
#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/etherdevice.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/irq.h>
#include "b44.h"
#define DRV_MODULE_NAME "b44"
#define PFX DRV_MODULE_NAME ": "
#define DRV_MODULE_VERSION "1.00"
#define DRV_MODULE_RELDATE "Apr 7, 2006"
#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 60
#define B44_MAX_MTU 1500
#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 B44_DMA_MASK 0x3fffffff
#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_BUF_SZ (1536 + bp->rx_offset + 64)
#define TX_PKT_BUF_SZ (B44_MAX_MTU + ETH_HLEN + 8)
/* minimum number of free TX descriptors required to wake up TX process */
#define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4)
static char version[] __devinitdata =
DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
MODULE_AUTHOR("Florian Schirmer, Pekka Pietikainen, David S. Miller");
MODULE_DESCRIPTION("Broadcom 4400 10/100 PCI ethernet driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);
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");
static struct pci_device_id b44_pci_tbl[] = {
{ PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ } /* terminate list with empty entry */
};
MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
static void b44_halt(struct b44 *);
static void b44_init_rings(struct b44 *);
static void b44_init_hw(struct b44 *);
static int dma_desc_align_mask;
static int dma_desc_sync_size;
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 pci_dev *pdev,
dma_addr_t dma_base,
unsigned long offset,
enum dma_data_direction dir)
{
dma_sync_single_range_for_device(&pdev->dev, dma_base,
offset & dma_desc_align_mask,
dma_desc_sync_size, dir);
}
static inline void b44_sync_dma_desc_for_cpu(struct pci_dev *pdev,
dma_addr_t dma_base,
unsigned long offset,
enum dma_data_direction dir)
{
dma_sync_single_range_for_cpu(&pdev->dev, dma_base,
offset & dma_desc_align_mask,
dma_desc_sync_size, dir);
}
static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
{
return readl(bp->regs + reg);
}
static inline void bw32(const struct b44 *bp,
unsigned long reg, unsigned long val)
{
writel(val, bp->regs + reg);
}
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) {
printk(KERN_ERR PFX "%s: BUG! Timeout waiting for bit %08x of register "
"%lx to %s.\n",
bp->dev->name,
bit, reg,
(clear ? "clear" : "set"));
return -ENODEV;
}
return 0;
}
/* Sonics SiliconBackplane support routines. ROFL, you should see all the
* buzz words used on this company's website :-)
*
* All of these routines must be invoked with bp->lock held and
* interrupts disabled.
*/
#define SB_PCI_DMA 0x40000000 /* Client Mode PCI memory access space (1 GB) */
#define BCM4400_PCI_CORE_ADDR 0x18002000 /* Address of PCI core on BCM4400 cards */
static u32 ssb_get_core_rev(struct b44 *bp)
{
return (br32(bp, B44_SBIDHIGH) & SBIDHIGH_RC_MASK);
}
static u32 ssb_pci_setup(struct b44 *bp, u32 cores)
{
u32 bar_orig, pci_rev, val;
pci_read_config_dword(bp->pdev, SSB_BAR0_WIN, &bar_orig);
pci_write_config_dword(bp->pdev, SSB_BAR0_WIN, BCM4400_PCI_CORE_ADDR);
pci_rev = ssb_get_core_rev(bp);
val = br32(bp, B44_SBINTVEC);
val |= cores;
bw32(bp, B44_SBINTVEC, val);
val = br32(bp, SSB_PCI_TRANS_2);
val |= SSB_PCI_PREF | SSB_PCI_BURST;
bw32(bp, SSB_PCI_TRANS_2, val);
pci_write_config_dword(bp->pdev, SSB_BAR0_WIN, bar_orig);
return pci_rev;
}
static void ssb_core_disable(struct b44 *bp)
{
if (br32(bp, B44_SBTMSLOW) & SBTMSLOW_RESET)
return;
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_CLOCK));
b44_wait_bit(bp, B44_SBTMSLOW, SBTMSLOW_REJECT, 100000, 0);
b44_wait_bit(bp, B44_SBTMSHIGH, SBTMSHIGH_BUSY, 100000, 1);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_FGC | SBTMSLOW_CLOCK |
SBTMSLOW_REJECT | SBTMSLOW_RESET));
br32(bp, B44_SBTMSLOW);
udelay(1);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_RESET));
br32(bp, B44_SBTMSLOW);
udelay(1);
}
static void ssb_core_reset(struct b44 *bp)
{
u32 val;
ssb_core_disable(bp);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_RESET | SBTMSLOW_CLOCK | SBTMSLOW_FGC));
br32(bp, B44_SBTMSLOW);
udelay(1);
/* Clear SERR if set, this is a hw bug workaround. */
if (br32(bp, B44_SBTMSHIGH) & SBTMSHIGH_SERR)
bw32(bp, B44_SBTMSHIGH, 0);
val = br32(bp, B44_SBIMSTATE);
if (val & (SBIMSTATE_IBE | SBIMSTATE_TO))
bw32(bp, B44_SBIMSTATE, val & ~(SBIMSTATE_IBE | SBIMSTATE_TO));
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK | SBTMSLOW_FGC));
br32(bp, B44_SBTMSLOW);
udelay(1);
bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK));
br32(bp, B44_SBTMSLOW);
udelay(1);
}
static int ssb_core_unit(struct b44 *bp)
{
#if 0
u32 val = br32(bp, B44_SBADMATCH0);
u32 base;
type = val & SBADMATCH0_TYPE_MASK;
switch (type) {
case 0:
base = val & SBADMATCH0_BS0_MASK;
break;
case 1:
base = val & SBADMATCH0_BS1_MASK;
break;
case 2:
default:
base = val & SBADMATCH0_BS2_MASK;
break;
};
#endif
return 0;
}
static int ssb_is_core_up(struct b44 *bp)
{
return ((br32(bp, B44_SBTMSLOW) & (SBTMSLOW_RESET | SBTMSLOW_REJECT | SBTMSLOW_CLOCK))
== SBTMSLOW_CLOCK);
}
static void __b44_cam_write(struct b44 *bp, 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 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) |
(bp->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 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) |
(bp->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);
}
/* miilib interface */
/* FIXME FIXME: phy_id is ignored, bp->phy_addr use is unconditional
* due to code existing before miilib use was added to this driver.
* Someone should remove this artificial driver limitation in
* b44_{read,write}phy. bp->phy_addr itself is fine (and needed).
*/
static int b44_mii_read(struct net_device *dev, int phy_id, int location)
{
u32 val;
struct b44 *bp = netdev_priv(dev);
int rc = b44_readphy(bp, location, &val);
if (rc)
return 0xffffffff;
return val;
}
static void b44_mii_write(struct net_device *dev, int phy_id, int location,
int val)
{
struct b44 *bp = netdev_priv(dev);
b44_writephy(bp, location, val);
}
static int b44_phy_reset(struct b44 *bp)
{
u32 val;
int err;
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) {
printk(KERN_ERR PFX "%s: PHY Reset would not complete.\n",
bp->dev->name);
err = -ENODEV;
}
}
return 0;
}
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);
}
static int b44_setup_phy(struct b44 *bp)
{
u32 val;
int err;
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;
u32 *val;
val = &bp->hw_stats.tx_good_octets;
for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
*val++ += br32(bp, reg);
}
/* Pad */
reg += 8*4UL;
for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
*val++ += br32(bp, reg);
}
}
static void b44_link_report(struct b44 *bp)
{
if (!netif_carrier_ok(bp->dev)) {
printk(KERN_INFO PFX "%s: Link is down.\n", bp->dev->name);
} else {
printk(KERN_INFO PFX "%s: Link is up at %d Mbps, %s duplex.\n",
bp->dev->name,
(bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
(bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
printk(KERN_INFO PFX "%s: Flow control is %s for TX and "
"%s for RX.\n",
bp->dev->name,
(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 (!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)
printk(KERN_WARNING PFX "%s: Remote fault detected in PHY\n",
bp->dev->name);
if (bmsr & BMSR_JCD)
printk(KERN_WARNING PFX "%s: Jabber detected in PHY\n",
bp->dev->name);
}
}
static void b44_timer(unsigned long __opaque)
{
struct b44 *bp = (struct b44 *) __opaque;
spin_lock_irq(&bp->lock);
b44_check_phy(bp);
b44_stats_update(bp);
spin_unlock_irq(&bp->lock);
bp->timer.expires = jiffies + HZ;
add_timer(&bp->timer);
}
static void b44_tx(struct b44 *bp)
{
u32 cur, cons;
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);
pci_unmap_single(bp->pdev,
pci_unmap_addr(rp, mapping),
skb->len,
PCI_DMA_TODEVICE);
rp->skb = NULL;
dev_kfree_skb_irq(skb);
}
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 = dev_alloc_skb(RX_PKT_BUF_SZ);
if (skb == NULL)
return -ENOMEM;
mapping = pci_map_single(bp->pdev, skb->data,
RX_PKT_BUF_SZ,
PCI_DMA_FROMDEVICE);
/* Hardware bug work-around, the chip is unable to do PCI DMA
to/from anything above 1GB :-( */
if (dma_mapping_error(mapping) ||
mapping + RX_PKT_BUF_SZ > B44_DMA_MASK) {
/* Sigh... */
if (!dma_mapping_error(mapping))
pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE);
dev_kfree_skb_any(skb);
skb = __dev_alloc_skb(RX_PKT_BUF_SZ,GFP_DMA);
if (skb == NULL)
return -ENOMEM;
mapping = pci_map_single(bp->pdev, skb->data,
RX_PKT_BUF_SZ,
PCI_DMA_FROMDEVICE);
if (dma_mapping_error(mapping) ||
mapping + RX_PKT_BUF_SZ > B44_DMA_MASK) {
if (!dma_mapping_error(mapping))
pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE);
dev_kfree_skb_any(skb);
return -ENOMEM;
}
}
skb->dev = bp->dev;
skb_reserve(skb, bp->rx_offset);
rh = (struct rx_header *)
(skb->data - bp->rx_offset);
rh->len = 0;
rh->flags = 0;
map->skb = skb;
pci_unmap_addr_set(map, mapping, mapping);
if (src_map != NULL)
src_map->skb = NULL;
ctrl = (DESC_CTRL_LEN & (RX_PKT_BUF_SZ - bp->rx_offset));
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->rx_offset + bp->dma_offset);
if (bp->flags & B44_FLAG_RX_RING_HACK)
b44_sync_dma_desc_for_device(bp->pdev, 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;
u32 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;
pci_unmap_addr_set(dest_map, mapping,
pci_unmap_addr(src_map, mapping));
if (bp->flags & B44_FLAG_RX_RING_HACK)
b44_sync_dma_desc_for_cpu(bp->pdev, 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->pdev, bp->rx_ring_dma,
dest_idx * sizeof(dest_desc),
DMA_BIDIRECTIONAL);
pci_dma_sync_single_for_device(bp->pdev, src_desc->addr,
RX_PKT_BUF_SZ,
PCI_DMA_FROMDEVICE);
}
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 = pci_unmap_addr(rp, mapping);
struct rx_header *rh;
u16 len;
pci_dma_sync_single_for_cpu(bp->pdev, map,
RX_PKT_BUF_SZ,
PCI_DMA_FROMDEVICE);
rh = (struct rx_header *) skb->data;
len = cpu_to_le16(rh->len);
if ((len > (RX_PKT_BUF_SZ - bp->rx_offset)) ||
(rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
drop_it:
b44_recycle_rx(bp, cons, bp->rx_prod);
drop_it_no_recycle:
bp->stats.rx_dropped++;
goto next_pkt;
}
if (len == 0) {
int i = 0;
do {
udelay(2);
barrier();
len = cpu_to_le16(rh->len);
} while (len == 0 && i++ < 5);
if (len == 0)
goto drop_it;
}
/* Omit CRC. */
len -= 4;
if (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;
pci_unmap_single(bp->pdev, map,
skb_size, PCI_DMA_FROMDEVICE);
/* Leave out rx_header */
skb_put(skb, len+bp->rx_offset);
skb_pull(skb,bp->rx_offset);
} else {
struct sk_buff *copy_skb;
b44_recycle_rx(bp, cons, bp->rx_prod);
copy_skb = dev_alloc_skb(len + 2);
if (copy_skb == NULL)
goto drop_it_no_recycle;
copy_skb->dev = bp->dev;
skb_reserve(copy_skb, 2);
skb_put(copy_skb, len);
/* DMA sync done above, copy just the actual packet */
memcpy(copy_skb->data, skb->data+bp->rx_offset, len);
skb = copy_skb;
}
skb->ip_summed = CHECKSUM_NONE;
skb->protocol = eth_type_trans(skb, bp->dev);
netif_receive_skb(skb);
bp->dev->last_rx = jiffies;
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 net_device *netdev, int *budget)
{
struct b44 *bp = netdev_priv(netdev);
int done;
spin_lock_irq(&bp->lock);
if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
/* spin_lock(&bp->tx_lock); */
b44_tx(bp);
/* spin_unlock(&bp->tx_lock); */
}
spin_unlock_irq(&bp->lock);
done = 1;
if (bp->istat & ISTAT_RX) {
int orig_budget = *budget;
int work_done;
if (orig_budget > netdev->quota)
orig_budget = netdev->quota;
work_done = b44_rx(bp, orig_budget);
*budget -= work_done;
netdev->quota -= work_done;
if (work_done >= orig_budget)
done = 0;
}
if (bp->istat & ISTAT_ERRORS) {
spin_lock_irq(&bp->lock);
b44_halt(bp);
b44_init_rings(bp);
b44_init_hw(bp);
netif_wake_queue(bp->dev);
spin_unlock_irq(&bp->lock);
done = 1;
}
if (done) {
netif_rx_complete(netdev);
b44_enable_ints(bp);
}
return (done ? 0 : 1);
}
static irqreturn_t b44_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
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);
/* ??? What the fuck is the purpose of the interrupt mask
* ??? register if we have to mask it out by hand anyways?
*/
istat &= imask;
if (istat) {
handled = 1;
if (unlikely(!netif_running(dev))) {
printk(KERN_INFO "%s: late interrupt.\n", dev->name);
goto irq_ack;
}
if (netif_rx_schedule_prep(dev)) {
/* NOTE: These writes are posted by the readback of
* the ISTAT register below.
*/
bp->istat = istat;
__b44_disable_ints(bp);
__netif_rx_schedule(dev);
} else {
printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
dev->name);
}
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)
{
struct b44 *bp = netdev_priv(dev);
printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
dev->name);
spin_lock_irq(&bp->lock);
b44_halt(bp);
b44_init_rings(bp);
b44_init_hw(bp);
spin_unlock_irq(&bp->lock);
b44_enable_ints(bp);
netif_wake_queue(dev);
}
static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
struct sk_buff *bounce_skb;
int rc = NETDEV_TX_OK;
dma_addr_t mapping;
u32 len, entry, ctrl;
len = skb->len;
spin_lock_irq(&bp->lock);
/* This is a hard error, log it. */
if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
netif_stop_queue(dev);
printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
dev->name);
goto err_out;
}
mapping = pci_map_single(bp->pdev, skb->data, len, PCI_DMA_TODEVICE);
if (dma_mapping_error(mapping) || mapping + len > B44_DMA_MASK) {
/* Chip can't handle DMA to/from >1GB, use bounce buffer */
if (!dma_mapping_error(mapping))
pci_unmap_single(bp->pdev, mapping, len, PCI_DMA_TODEVICE);
bounce_skb = __dev_alloc_skb(TX_PKT_BUF_SZ,
GFP_ATOMIC|GFP_DMA);
if (!bounce_skb)
goto err_out;
mapping = pci_map_single(bp->pdev, bounce_skb->data,
len, PCI_DMA_TODEVICE);
if (dma_mapping_error(mapping) || mapping + len > B44_DMA_MASK) {
if (!dma_mapping_error(mapping))
pci_unmap_single(bp->pdev, mapping,
len, PCI_DMA_TODEVICE);
dev_kfree_skb_any(bounce_skb);
goto err_out;
}
memcpy(skb_put(bounce_skb, len), skb->data, skb->len);
dev_kfree_skb_any(skb);
skb = bounce_skb;
}
entry = bp->tx_prod;
bp->tx_buffers[entry].skb = skb;
pci_unmap_addr_set(&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->pdev, 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);
if (TX_BUFFS_AVAIL(bp) < 1)
netif_stop_queue(dev);
dev->trans_start = jiffies;
out_unlock:
spin_unlock_irq(&bp->lock);
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 (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
return -EINVAL;
if (!netif_running(dev)) {
/* We'll just catch it later when the
* device is up'd.
*/
dev->mtu = new_mtu;
return 0;
}
spin_lock_irq(&bp->lock);
b44_halt(bp);
dev->mtu = new_mtu;
b44_init_rings(bp);
b44_init_hw(bp);
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;
pci_unmap_single(bp->pdev,
pci_unmap_addr(rp, mapping),
RX_PKT_BUF_SZ,
PCI_DMA_FROMDEVICE);
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;
pci_unmap_single(bp->pdev,
pci_unmap_addr(rp, mapping),
rp->skb->len,
PCI_DMA_TODEVICE);
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->pdev->dev, bp->rx_ring_dma,
DMA_TABLE_BYTES,
PCI_DMA_BIDIRECTIONAL);
if (bp->flags & B44_FLAG_TX_RING_HACK)
dma_sync_single_for_device(&bp->pdev->dev, bp->tx_ring_dma,
DMA_TABLE_BYTES,
PCI_DMA_TODEVICE);
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->pdev->dev, bp->rx_ring_dma,
DMA_TABLE_BYTES,
DMA_BIDIRECTIONAL);
kfree(bp->rx_ring);
} else
pci_free_consistent(bp->pdev, 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->pdev->dev, bp->tx_ring_dma,
DMA_TABLE_BYTES,
DMA_TO_DEVICE);
kfree(bp->tx_ring);
} else
pci_free_consistent(bp->pdev, 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)
{
int size;
size = B44_RX_RING_SIZE * sizeof(struct ring_info);
bp->rx_buffers = kzalloc(size, GFP_KERNEL);
if (!bp->rx_buffers)
goto out_err;
size = B44_TX_RING_SIZE * sizeof(struct ring_info);
bp->tx_buffers = kzalloc(size, GFP_KERNEL);
if (!bp->tx_buffers)
goto out_err;
size = DMA_TABLE_BYTES;
bp->rx_ring = pci_alloc_consistent(bp->pdev, size, &bp->rx_ring_dma);
if (!bp->rx_ring) {
/* Allocation may have failed due to pci_alloc_consistent
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_KERNEL);
if (!rx_ring)
goto out_err;
rx_ring_dma = dma_map_single(&bp->pdev->dev, rx_ring,
DMA_TABLE_BYTES,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(rx_ring_dma) ||
rx_ring_dma + size > B44_DMA_MASK) {
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 = pci_alloc_consistent(bp->pdev, size, &bp->tx_ring_dma);
if (!bp->tx_ring) {
/* Allocation may have failed due to pci_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_KERNEL);
if (!tx_ring)
goto out_err;
tx_ring_dma = dma_map_single(&bp->pdev->dev, tx_ring,
DMA_TABLE_BYTES,
DMA_TO_DEVICE);
if (dma_mapping_error(tx_ring_dma) ||
tx_ring_dma + size > B44_DMA_MASK) {
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)
{
if (ssb_is_core_up(bp)) {
bw32(bp, B44_RCV_LAZY, 0);
bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 100, 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;
} else {
ssb_pci_setup(bp, (bp->core_unit == 0 ?
SBINTVEC_ENET0 :
SBINTVEC_ENET1));
}
ssb_core_reset(bp);
b44_clear_stats(bp);
/* Make PHY accessible. */
bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
(0x0d & MDIO_CTRL_MAXF_MASK)));
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_INTERNAL_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_INTERNAL_PHY;
}
}
/* bp->lock is held. */
static void b44_halt(struct b44 *bp)
{
b44_disable_ints(bp);
b44_chip_reset(bp);
}
/* 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;
if (netif_running(dev))
return -EBUSY;
if (!is_valid_ether_addr(addr->sa_data))
return -EINVAL;
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
spin_lock_irq(&bp->lock);
__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)
{
u32 val;
b44_chip_reset(bp);
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 */
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 |
(bp->rx_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));
}
static int b44_open(struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
int err;
err = b44_alloc_consistent(bp);
if (err)
goto out;
b44_init_rings(bp);
b44_init_hw(bp);
b44_check_phy(bp);
err = request_irq(dev->irq, b44_interrupt, SA_SHIRQ, dev->name, dev);
if (unlikely(err < 0)) {
b44_chip_reset(bp);
b44_free_rings(bp);
b44_free_consistent(bp);
goto out;
}
init_timer(&bp->timer);
bp->timer.expires = jiffies + HZ;
bp->timer.data = (unsigned long) bp;
bp->timer.function = b44_timer;
add_timer(&bp->timer);
b44_enable_ints(bp);
netif_start_queue(dev);
out:
return err;
}
#if 0
/*static*/ void b44_dump_state(struct b44 *bp)
{
u32 val32, val32_2, val32_3, val32_4, val32_5;
u16 val16;
pci_read_config_word(bp->pdev, PCI_STATUS, &val16);
printk("DEBUG: PCI status [%04x] \n", val16);
}
#endif
#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, NULL);
enable_irq(dev->irq);
}
#endif
static int b44_close(struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
netif_stop_queue(dev);
netif_poll_disable(dev);
del_timer_sync(&bp->timer);
spin_lock_irq(&bp->lock);
#if 0
b44_dump_state(bp);
#endif
b44_halt(bp);
b44_free_rings(bp);
netif_carrier_off(dev);
spin_unlock_irq(&bp->lock);
free_irq(dev->irq, dev);
netif_poll_enable(dev);
b44_free_consistent(bp);
return 0;
}
static struct net_device_stats *b44_get_stats(struct net_device *dev)
{
struct b44 *bp = netdev_priv(dev);
struct net_device_stats *nstat = &bp->stats;
struct b44_hw_stats *hwstat = &bp->hw_stats;
/* Convert HW stats into netdevice 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->tx_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
return nstat;
}
static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
{
struct dev_mc_list *mclist;
int i, num_ents;
num_ents = min_t(int, dev->mc_count, B44_MCAST_TABLE_SIZE);
mclist = dev->mc_list;
for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
__b44_cam_write(bp, mclist->dmi_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_PROMISC;
bw32(bp, B44_RXCONFIG, val);
} else {
unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
int i = 0;
__b44_set_mac_addr(bp);
if (dev->flags & IFF_ALLMULTI)
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 pci_dev *pci_dev = bp->pdev;
strcpy (info->driver, DRV_MODULE_NAME);
strcpy (info->version, DRV_MODULE_VERSION);
strcpy (info->bus_info, pci_name(pci_dev));
}
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) {
b44_writephy(bp, MII_BMCR,
bmcr | BMCR_ANRESTART);
r = 0;
}
spin_unlock_irq(&bp->lock);
return r;
}
static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct b44 *bp = netdev_priv(dev);
if (!netif_running(dev))
return -EAGAIN;
cmd->supported = (SUPPORTED_Autoneg);
cmd->supported |= (SUPPORTED_100baseT_Half |
SUPPORTED_100baseT_Full |
SUPPORTED_10baseT_Half |
SUPPORTED_10baseT_Full |
SUPPORTED_MII);
cmd->advertising = 0;
if (bp->flags & B44_FLAG_ADV_10HALF)
cmd->advertising |= ADVERTISED_10baseT_Half;
if (bp->flags & B44_FLAG_ADV_10FULL)
cmd->advertising |= ADVERTISED_10baseT_Full;
if (bp->flags & B44_FLAG_ADV_100HALF)
cmd->advertising |= ADVERTISED_100baseT_Half;
if (bp->flags & B44_FLAG_ADV_100FULL)
cmd->advertising |= ADVERTISED_100baseT_Full;
cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
SPEED_100 : SPEED_10;
cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
DUPLEX_FULL : DUPLEX_HALF;
cmd->port = 0;
cmd->phy_address = bp->phy_addr;
cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
XCVR_INTERNAL : XCVR_EXTERNAL;
cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
AUTONEG_DISABLE : AUTONEG_ENABLE;
cmd->maxtxpkt = 0;
cmd->maxrxpkt = 0;
return 0;
}
static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct b44 *bp = netdev_priv(dev);
if (!netif_running(dev))
return -EAGAIN;
/* We do not support gigabit. */
if (cmd->autoneg == AUTONEG_ENABLE) {
if (cmd->advertising &
(ADVERTISED_1000baseT_Half |
ADVERTISED_1000baseT_Full))
return -EINVAL;
} else if ((cmd->speed != SPEED_100 &&
cmd->speed != SPEED_10) ||
(cmd->duplex != DUPLEX_HALF &&
cmd->duplex != DUPLEX_FULL)) {
return -EINVAL;
}
spin_lock_irq(&bp->lock);
if (cmd->autoneg == AUTONEG_ENABLE) {
bp->flags &= ~B44_FLAG_FORCE_LINK;
bp->flags &= ~(B44_FLAG_ADV_10HALF |
B44_FLAG_ADV_10FULL |
B44_FLAG_ADV_100HALF |
B44_FLAG_ADV_100FULL);
if (cmd->advertising & ADVERTISE_10HALF)
bp->flags |= B44_FLAG_ADV_10HALF;
if (cmd->advertising & ADVERTISE_10FULL)
bp->flags |= B44_FLAG_ADV_10FULL;
if (cmd->advertising & ADVERTISE_100HALF)
bp->flags |= B44_FLAG_ADV_100HALF;
if (cmd->advertising & ADVERTISE_100FULL)
bp->flags |= B44_FLAG_ADV_100FULL;
} else {
bp->flags |= B44_FLAG_FORCE_LINK;
if (cmd->speed == SPEED_100)
bp->flags |= B44_FLAG_100_BASE_T;
if (cmd->duplex == DUPLEX_FULL)
bp->flags |= B44_FLAG_FULL_DUPLEX;
}
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 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 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);
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 (bp->flags & B44_FLAG_PAUSE_AUTO) {
b44_halt(bp);
b44_init_rings(bp);
b44_init_hw(bp);
} 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_stats_count(struct net_device *dev)
{
return ARRAY_SIZE(b44_gstrings);
}
static void b44_get_ethtool_stats(struct net_device *dev,
struct ethtool_stats *stats, u64 *data)
{
struct b44 *bp = netdev_priv(dev);
u32 *val = &bp->hw_stats.tx_good_octets;
u32 i;
spin_lock_irq(&bp->lock);
b44_stats_update(bp);
for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
*data++ = *val++;
spin_unlock_irq(&bp->lock);
}
static struct ethtool_ops b44_ethtool_ops = {
.get_drvinfo = b44_get_drvinfo,
.get_settings = b44_get_settings,
.set_settings = b44_set_settings,
.nway_reset = b44_nway_reset,
.get_link = ethtool_op_get_link,
.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_stats_count = b44_get_stats_count,
.get_ethtool_stats = b44_get_ethtool_stats,
.get_perm_addr = ethtool_op_get_perm_addr,
};
static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct mii_ioctl_data *data = if_mii(ifr);
struct b44 *bp = netdev_priv(dev);
int err = -EINVAL;
if (!netif_running(dev))
goto out;
spin_lock_irq(&bp->lock);
err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
spin_unlock_irq(&bp->lock);
out:
return err;
}
/* Read 128-bytes of EEPROM. */
static int b44_read_eeprom(struct b44 *bp, u8 *data)
{
long i;
u16 *ptr = (u16 *) data;
for (i = 0; i < 128; i += 2)
ptr[i / 2] = readw(bp->regs + 4096 + i);
return 0;
}
static int __devinit b44_get_invariants(struct b44 *bp)
{
u8 eeprom[128];
int err;
err = b44_read_eeprom(bp, &eeprom[0]);
if (err)
goto out;
bp->dev->dev_addr[0] = eeprom[79];
bp->dev->dev_addr[1] = eeprom[78];
bp->dev->dev_addr[2] = eeprom[81];
bp->dev->dev_addr[3] = eeprom[80];
bp->dev->dev_addr[4] = eeprom[83];
bp->dev->dev_addr[5] = eeprom[82];
if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
printk(KERN_ERR PFX "Invalid MAC address found in EEPROM\n");
return -EINVAL;
}
memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
bp->phy_addr = eeprom[90] & 0x1f;
/* With this, plus the rx_header prepended to the data by the
* hardware, we'll land the ethernet header on a 2-byte boundary.
*/
bp->rx_offset = 30;
bp->imask = IMASK_DEF;
bp->core_unit = ssb_core_unit(bp);
bp->dma_offset = SB_PCI_DMA;
/* XXX - really required?
bp->flags |= B44_FLAG_BUGGY_TXPTR;
*/
out:
return err;
}
static int __devinit b44_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
static int b44_version_printed = 0;
unsigned long b44reg_base, b44reg_len;
struct net_device *dev;
struct b44 *bp;
int err, i;
if (b44_version_printed++ == 0)
printk(KERN_INFO "%s", version);
err = pci_enable_device(pdev);
if (err) {
printk(KERN_ERR PFX "Cannot enable PCI device, "
"aborting.\n");
return err;
}
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
printk(KERN_ERR PFX "Cannot find proper PCI device "
"base address, aborting.\n");
err = -ENODEV;
goto err_out_disable_pdev;
}
err = pci_request_regions(pdev, DRV_MODULE_NAME);
if (err) {
printk(KERN_ERR PFX "Cannot obtain PCI resources, "
"aborting.\n");
goto err_out_disable_pdev;
}
pci_set_master(pdev);
err = pci_set_dma_mask(pdev, (u64) B44_DMA_MASK);
if (err) {
printk(KERN_ERR PFX "No usable DMA configuration, "
"aborting.\n");
goto err_out_free_res;
}
err = pci_set_consistent_dma_mask(pdev, (u64) B44_DMA_MASK);
if (err) {
printk(KERN_ERR PFX "No usable DMA configuration, "
"aborting.\n");
goto err_out_free_res;
}
b44reg_base = pci_resource_start(pdev, 0);
b44reg_len = pci_resource_len(pdev, 0);
dev = alloc_etherdev(sizeof(*bp));
if (!dev) {
printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
err = -ENOMEM;
goto err_out_free_res;
}
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev,&pdev->dev);
/* No interesting netdevice features in this card... */
dev->features |= 0;
bp = netdev_priv(dev);
bp->pdev = pdev;
bp->dev = dev;
bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
spin_lock_init(&bp->lock);
bp->regs = ioremap(b44reg_base, b44reg_len);
if (bp->regs == 0UL) {
printk(KERN_ERR PFX "Cannot map device registers, "
"aborting.\n");
err = -ENOMEM;
goto err_out_free_dev;
}
bp->rx_pending = B44_DEF_RX_RING_PENDING;
bp->tx_pending = B44_DEF_TX_RING_PENDING;
dev->open = b44_open;
dev->stop = b44_close;
dev->hard_start_xmit = b44_start_xmit;
dev->get_stats = b44_get_stats;
dev->set_multicast_list = b44_set_rx_mode;
dev->set_mac_address = b44_set_mac_addr;
dev->do_ioctl = b44_ioctl;
dev->tx_timeout = b44_tx_timeout;
dev->poll = b44_poll;
dev->weight = 64;
dev->watchdog_timeo = B44_TX_TIMEOUT;
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = b44_poll_controller;
#endif
dev->change_mtu = b44_change_mtu;
dev->irq = pdev->irq;
SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
netif_carrier_off(dev);
err = b44_get_invariants(bp);
if (err) {
printk(KERN_ERR PFX "Problem fetching invariants of chip, "
"aborting.\n");
goto err_out_iounmap;
}
bp->mii_if.dev = dev;
bp->mii_if.mdio_read = b44_mii_read;
bp->mii_if.mdio_write = b44_mii_write;
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) {
printk(KERN_ERR PFX "Cannot register net device, "
"aborting.\n");
goto err_out_iounmap;
}
pci_set_drvdata(pdev, dev);
pci_save_state(bp->pdev);
/* Chip reset provides power to the b44 MAC & PCI cores, which
* is necessary for MAC register access.
*/
b44_chip_reset(bp);
printk(KERN_INFO "%s: Broadcom 4400 10/100BaseT Ethernet ", dev->name);
for (i = 0; i < 6; i++)
printk("%2.2x%c", dev->dev_addr[i],
i == 5 ? '\n' : ':');
return 0;
err_out_iounmap:
iounmap(bp->regs);
err_out_free_dev:
free_netdev(dev);
err_out_free_res:
pci_release_regions(pdev);
err_out_disable_pdev:
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
return err;
}
static void __devexit b44_remove_one(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct b44 *bp = netdev_priv(dev);
unregister_netdev(dev);
iounmap(bp->regs);
free_netdev(dev);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
}
static int b44_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct b44 *bp = netdev_priv(dev);
if (!netif_running(dev))
return 0;
del_timer_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);
pci_disable_device(pdev);
return 0;
}
static int b44_resume(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct b44 *bp = netdev_priv(dev);
pci_restore_state(pdev);
pci_enable_device(pdev);
pci_set_master(pdev);
if (!netif_running(dev))
return 0;
if (request_irq(dev->irq, b44_interrupt, SA_SHIRQ, dev->name, dev))
printk(KERN_ERR PFX "%s: request_irq failed\n", dev->name);
spin_lock_irq(&bp->lock);
b44_init_rings(bp);
b44_init_hw(bp);
netif_device_attach(bp->dev);
spin_unlock_irq(&bp->lock);
bp->timer.expires = jiffies + HZ;
add_timer(&bp->timer);
b44_enable_ints(bp);
netif_wake_queue(dev);
return 0;
}
static struct pci_driver b44_driver = {
.name = DRV_MODULE_NAME,
.id_table = b44_pci_tbl,
.probe = b44_init_one,
.remove = __devexit_p(b44_remove_one),
.suspend = b44_suspend,
.resume = b44_resume,
};
static int __init b44_init(void)
{
unsigned int dma_desc_align_size = dma_get_cache_alignment();
/* Setup paramaters for syncing RX/TX DMA descriptors */
dma_desc_align_mask = ~(dma_desc_align_size - 1);
dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
return pci_module_init(&b44_driver);
}
static void __exit b44_cleanup(void)
{
pci_unregister_driver(&b44_driver);
}
module_init(b44_init);
module_exit(b44_cleanup);
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