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wil6210: set dma mask to reflect device capability

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device supports 48bit addresses, reflect that by
setting the dma mask accordingly.

Signed-off-by: Hamad Kadmany <qca_hkadmany@qca.qualcomm.com>
Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Hamad Kadmany
2017-03-08 13:52:10 +02:00
committed by Kalle Valo
parent 4aa2d31f5d
commit f2de576dcf
4 changed files with 51 additions and 2 deletions
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19
drivers/net/wireless/ath/wil6210/txrx.c
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@@ -123,15 +123,32 @@ static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring)
vring->va = NULL;
return -ENOMEM;
}
/* vring->va should be aligned on its size rounded up to power of 2
* This is granted by the dma_alloc_coherent
* This is granted by the dma_alloc_coherent.
*
* HW has limitation that all vrings addresses must share the same
* upper 16 msb bits part of 48 bits address. To workaround that,
* if we are using 48 bit addresses switch to 32 bit allocation
* before allocating vring memory.
*
* There's no check for the return value of dma_set_mask_and_coherent,
* since we assume if we were able to set the mask during
* initialization in this system it will not fail if we set it again
*/
if (wil->use_extended_dma_addr)
dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL);
if (!vring->va) {
kfree(vring->ctx);
vring->ctx = NULL;
return -ENOMEM;
}
if (wil->use_extended_dma_addr)
dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
/* initially, all descriptors are SW owned
* For Tx and Rx, ownership bit is at the same location, thus
* we can use any