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qcacmn: get HP of RXDMA ring without incrementing

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get the HP of the RXDMA ring without incrementing
This will ensure in case of nbuf failures the ring
HP remains unchanged

Change-Id: I69ec9207a44a4c50484933797326e962ad2d4a5c
CRs-Fixed: 3309394
This commit is contained in:
Tallapragada Kalyan
2022-10-10 23:21:01 +05:30
committed by Madan Koyyalamudi
parent efff4ec854
commit 4c45f8a2ed
2 changed files with 26 additions and 2 deletions
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5
dp/wifi3.0/dp_rx.c
View File

@@ -420,8 +420,8 @@ __dp_rx_buffers_no_map_replenish(struct dp_soc *soc, uint32_t mac_id,
next = (*desc_list)->next;
qdf_prefetch(next);
rxdma_ring_entry = (struct dp_buffer_addr_info *)
hal_srng_src_get_next(soc->hal_soc, rxdma_srng);
if (!rxdma_ring_entry)
hal_srng_src_peek(soc->hal_soc, rxdma_srng);
if (qdf_unlikely(!rxdma_ring_entry))
break;
nbuf = dp_rx_nbuf_alloc(soc, rx_desc_pool);
@@ -449,6 +449,7 @@ __dp_rx_buffers_no_map_replenish(struct dp_soc *soc, uint32_t mac_id,
rx_desc_pool->owner);
*desc_list = next;
hal_srng_src_get_next(soc->hal_soc, rxdma_srng);
}
qdf_dsb();
hal_srng_access_end(soc->hal_soc, rxdma_srng);

23
hal/wifi3.0/hal_api.h
View File

@@ -1975,6 +1975,29 @@ void *hal_srng_src_get_next_consumed(void *hal_soc,
}
#endif /* CLEAR_SW2TCL_CONSUMED_DESC */
/**
* hal_srng_src_peek - get the HP of the SRC ring
* @hal_soc: Opaque HAL SOC handle
* @hal_ring_hdl: Source ring pointer
*
* get the head pointer in the src ring but do not increment it
*/
static inline
void *hal_srng_src_peek(void *hal_soc, hal_ring_handle_t hal_ring_hdl)
{
struct hal_srng *srng = (struct hal_srng *)hal_ring_hdl;
uint32_t *desc;
uint32_t next_hp = (srng->u.src_ring.hp + srng->entry_size) %
srng->ring_size;
if (next_hp != srng->u.src_ring.cached_tp) {
desc = &(srng->ring_base_vaddr[srng->u.src_ring.hp]);
return (void *)desc;
}
return NULL;
}
/**
* hal_srng_src_get_next - Get next entry from a source ring and move cached tail pointer
*