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[PATCH] bcm43xx-softmac: Fix system hang for x86-64 with >1GB RAM

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The bcm43xx-softmac software currently fails when running on x86_64 systems
with more than 1GB RAM and one of the card variants with 30-bit DMA addressing.
This patch uses the address extension bits in the hardware to set the correct
DMA mask for the specific card in use.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger 2006-10-02 23:48:54 -05:00 committed by John W. Linville
parent 16bfa676a7
commit 8da81e52b7
3 changed files with 46 additions and 24 deletions
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28
drivers/net/wireless/bcm43xx/bcm43xx_dma.c
View file

@ -705,11 +705,30 @@ int bcm43xx_dma_init(struct bcm43xx_private *bcm)
struct bcm43xx_dmaring *ring;
int err = -ENOMEM;
int dma64 = 0;
u32 sbtmstatehi;
u64 mask = bcm43xx_get_supported_dma_mask(bcm);
int nobits;
sbtmstatehi = bcm43xx_read32(bcm, BCM43xx_CIR_SBTMSTATEHIGH);
if (sbtmstatehi & BCM43xx_SBTMSTATEHIGH_DMA64BIT)
if (mask == DMA_64BIT_MASK) {
dma64 = 1;
nobits = 64;
} else if (mask == DMA_32BIT_MASK)
nobits = 32;
else
nobits = 30;
err = pci_set_dma_mask(bcm->pci_dev, mask);
err |= pci_set_consistent_dma_mask(bcm->pci_dev, mask);
if (err) {
#ifdef CONFIG_BCM43XX_PIO
printk(KERN_WARNING PFX "DMA not supported on this device."
" Falling back to PIO.\n");
bcm->__using_pio = 1;
return -ENOSYS;
#else
printk(KERN_ERR PFX "FATAL: DMA not supported and PIO not configured. "
"Please recompile the driver with PIO support.\n");
return -ENODEV;
#endif /* CONFIG_BCM43XX_PIO */
}
/* setup TX DMA channels. */
ring = bcm43xx_setup_dmaring(bcm, 0, 1, dma64);
@ -755,8 +774,7 @@ int bcm43xx_dma_init(struct bcm43xx_private *bcm)
dma->rx_ring3 = ring;
}
dprintk(KERN_INFO PFX "%s DMA initialized\n",
dma64 ? "64-bit" : "32-bit");
dprintk(KERN_INFO PFX "%d-bit DMA initialized\n", nobits);
err = 0;
out:
return err;

17
drivers/net/wireless/bcm43xx/bcm43xx_dma.h
View file

@ -314,6 +314,23 @@ int bcm43xx_dma_tx(struct bcm43xx_private *bcm,
struct ieee80211_txb *txb);
void bcm43xx_dma_rx(struct bcm43xx_dmaring *ring);
/* Helper function that returns the dma mask for this device. */
static inline
u64 bcm43xx_get_supported_dma_mask(struct bcm43xx_private *bcm)
{
int dma64 = bcm43xx_read32(bcm, BCM43xx_CIR_SBTMSTATEHIGH) &
BCM43xx_SBTMSTATEHIGH_DMA64BIT;
u16 mmio_base = bcm43xx_dmacontroller_base(dma64, 0);
u32 mask = BCM43xx_DMA32_TXADDREXT_MASK;
if (dma64)
return DMA_64BIT_MASK;
bcm43xx_write32(bcm, mmio_base + BCM43xx_DMA32_TXCTL, mask);
if (bcm43xx_read32(bcm, mmio_base + BCM43xx_DMA32_TXCTL) & mask)
return DMA_32BIT_MASK;
return DMA_30BIT_MASK;
}
#else /* CONFIG_BCM43XX_DMA */

25
drivers/net/wireless/bcm43xx/bcm43xx_main.c
View file

@ -2925,10 +2925,13 @@ static int bcm43xx_wireless_core_init(struct bcm43xx_private *bcm,
bcm43xx_write16(bcm, 0x043C, 0x000C);
if (active_wlcore) {
if (bcm43xx_using_pio(bcm))
if (bcm43xx_using_pio(bcm)) {
err = bcm43xx_pio_init(bcm);
else
} else {
err = bcm43xx_dma_init(bcm);
if (err == -ENOSYS)
err = bcm43xx_pio_init(bcm);
}
if (err)
goto err_chip_cleanup;
}
@ -3992,8 +3995,6 @@ static int bcm43xx_init_private(struct bcm43xx_private *bcm,
struct net_device *net_dev,
struct pci_dev *pci_dev)
{
int err;
bcm43xx_set_status(bcm, BCM43xx_STAT_UNINIT);
bcm->ieee = netdev_priv(net_dev);
bcm->softmac = ieee80211_priv(net_dev);
@ -4011,22 +4012,8 @@ static int bcm43xx_init_private(struct bcm43xx_private *bcm,
(void (*)(unsigned long))bcm43xx_interrupt_tasklet,
(unsigned long)bcm);
tasklet_disable_nosync(&bcm->isr_tasklet);
if (modparam_pio) {
if (modparam_pio)
bcm->__using_pio = 1;
} else {
err = pci_set_dma_mask(pci_dev, DMA_30BIT_MASK);
err |= pci_set_consistent_dma_mask(pci_dev, DMA_30BIT_MASK);
if (err) {
#ifdef CONFIG_BCM43XX_PIO
printk(KERN_WARNING PFX "DMA not supported. Falling back to PIO.\n");
bcm->__using_pio = 1;
#else
printk(KERN_ERR PFX "FATAL: DMA not supported and PIO not configured. "
"Recompile the driver with PIO support, please.\n");
return -ENODEV;
#endif /* CONFIG_BCM43XX_PIO */
}
}
bcm->rts_threshold = BCM43xx_DEFAULT_RTS_THRESHOLD;
/* default to sw encryption for now */