diff options
| author | Larry Finger <Larry.Finger@lwfinger.net> | 2006-10-02 23:48:54 -0500 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2006-10-16 20:09:48 -0400 |
| commit | 8da81e52b743edac0bfbb7d0c1286f919b2f209b (patch) | |
| tree | 7b55c4c8e26be4ecedcbe404139d16ae05b53e9f /drivers/net/wireless/bcm43xx/bcm43xx_dma.c | |
| parent | 16bfa676a7cc64695f7e9694c380ebd26c461ae5 (diff) | |
| download | lwn-8da81e52b743edac0bfbb7d0c1286f919b2f209b.tar.gz lwn-8da81e52b743edac0bfbb7d0c1286f919b2f209b.zip | |
[PATCH] bcm43xx-softmac: Fix system hang for x86-64 with >1GB RAM
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>
Diffstat (limited to 'drivers/net/wireless/bcm43xx/bcm43xx_dma.c')
| -rw-r--r-- | drivers/net/wireless/bcm43xx/bcm43xx_dma.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_dma.c b/drivers/net/wireless/bcm43xx/bcm43xx_dma.c index 76e3aed4b471..978ed099e285 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_dma.c +++ b/drivers/net/wireless/bcm43xx/bcm43xx_dma.c @@ -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; |