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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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17
drivers/net/wireless/ath/wil6210/pmc.c
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@@ -107,13 +107,28 @@ void wil_pmc_alloc(struct wil6210_priv *wil,
/* Allocate pring buffer and descriptors.
* 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));
pmc->pring_va = dma_alloc_coherent(dev,
sizeof(struct vring_tx_desc) * num_descriptors,
&pmc->pring_pa,
GFP_KERNEL);
if (wil->use_extended_dma_addr)
dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
wil_dbg_misc(wil,
"pmc_alloc: allocated pring %p => %pad. %zd x %d = total %zd bytes\n",
pmc->pring_va, &pmc->pring_pa,