diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath11k/hal.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath11k/hal.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/ath11k/hal.c b/drivers/net/wireless/ath/ath11k/hal.c index c060c4b5c0..f3d04568c2 100644 --- a/drivers/net/wireless/ath/ath11k/hal.c +++ b/drivers/net/wireless/ath/ath11k/hal.c @@ -626,15 +626,30 @@ u32 *ath11k_hal_srng_dst_peek(struct ath11k_base *ab, struct hal_srng *srng) return NULL; } +static u32 *ath11k_hal_srng_dst_peek_with_dma(struct ath11k_base *ab, + struct hal_srng *srng, dma_addr_t *paddr) +{ + lockdep_assert_held(&srng->lock); + + if (srng->u.dst_ring.tp != srng->u.dst_ring.cached_hp) { + *paddr = srng->ring_base_paddr + + sizeof(*srng->ring_base_vaddr) * srng->u.dst_ring.tp; + return srng->ring_base_vaddr + srng->u.dst_ring.tp; + } + + return NULL; +} + static void ath11k_hal_srng_prefetch_desc(struct ath11k_base *ab, struct hal_srng *srng) { + dma_addr_t desc_paddr; u32 *desc; /* prefetch only if desc is available */ - desc = ath11k_hal_srng_dst_peek(ab, srng); + desc = ath11k_hal_srng_dst_peek_with_dma(ab, srng, &desc_paddr); if (likely(desc)) { - dma_sync_single_for_cpu(ab->dev, virt_to_phys(desc), + dma_sync_single_for_cpu(ab->dev, desc_paddr, (srng->entry_size * sizeof(u32)), DMA_FROM_DEVICE); prefetch(desc); |