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path: root/drivers/net/wireless/bcm43xx/bcm43xx_dma.c
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Diffstat (limited to 'drivers/net/wireless/bcm43xx/bcm43xx_dma.c')
-rw-r--r--drivers/net/wireless/bcm43xx/bcm43xx_dma.c28
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 76e3aed4b47..978ed099e28 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;