samsung-sm8650/android_kernel_samsung_sm8650-modules
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qcacmn: Restrict DMA Map/UnMap upto buffer size

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Restrict DMA Map/UnMap upto buffer size for packets in rx process.
This gives 2-3% cpu gain in peak throughput.

Change-Id: Iaf5e9f6f734d80b6d2c234bd8e679cf2a81c7e2c
CRs-Fixed: 2660698
Cette révision appartient à :
Varsha Mishra
2020-04-20 11:59:09 +05:30
révisé par nshrivas
Parent ac0322cce9
révision c71df5eef4
3 fichiers modifiés avec 35 ajouts et 24 suppressions
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38
dp/wifi3.0/dp_rx.c
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@@ -247,8 +247,9 @@ QDF_STATUS dp_rx_buffers_replenish(struct dp_soc *dp_soc, uint32_t mac_id,
break;
}
ret = qdf_nbuf_map_single(dp_soc->osdev, rx_netbuf,
QDF_DMA_FROM_DEVICE);
ret = qdf_nbuf_map_nbytes_single(dp_soc->osdev, rx_netbuf,
QDF_DMA_FROM_DEVICE, buf_size);
if (qdf_unlikely(QDF_IS_STATUS_ERROR(ret))) {
qdf_nbuf_free(rx_netbuf);
DP_STATS_INC(dp_pdev, replenish.map_err, 1);
@@ -1992,14 +1993,6 @@ more_data:
}
/*
* move unmap after scattered msdu waiting break logic
* in case double skb unmap happened.
*/
qdf_nbuf_unmap_single(soc->osdev, rx_desc->nbuf,
QDF_DMA_FROM_DEVICE);
rx_desc->unmapped = 1;
core_id = smp_processor_id();
DP_STATS_INC(soc, rx.ring_packets[core_id][ring_id], 1);
@@ -2057,6 +2050,15 @@ more_data:
QDF_NBUF_CB_RX_CTX_ID(rx_desc->nbuf) = reo_ring_num;
/*
* move unmap after scattered msdu waiting break logic
* in case double skb unmap happened.
*/
rx_desc_pool = &soc->rx_desc_buf[rx_desc->pool_id];
qdf_nbuf_unmap_nbytes_single(soc->osdev, rx_desc->nbuf,
QDF_DMA_FROM_DEVICE,
rx_desc_pool->buf_size);
rx_desc->unmapped = 1;
DP_RX_LIST_APPEND(nbuf_head, nbuf_tail, rx_desc->nbuf);
/*
@@ -2500,8 +2502,10 @@ dp_pdev_nbuf_alloc_and_map(struct dp_soc *dp_soc, qdf_nbuf_t *nbuf,
return ret;
}
ret = qdf_nbuf_map_single(dp_soc->osdev, *nbuf,
QDF_DMA_FROM_DEVICE);
ret = qdf_nbuf_map_nbytes_single(dp_soc->osdev, *nbuf,
QDF_DMA_FROM_DEVICE,
rx_desc_pool->buf_size);
if (qdf_unlikely(QDF_IS_STATUS_ERROR(ret))) {
qdf_nbuf_free(*nbuf);
dp_err("nbuf map failed");
@@ -2513,8 +2517,9 @@ dp_pdev_nbuf_alloc_and_map(struct dp_soc *dp_soc, qdf_nbuf_t *nbuf,
ret = check_x86_paddr(dp_soc, nbuf, &paddr, rx_desc_pool);
if (ret == QDF_STATUS_E_FAILURE) {
qdf_nbuf_unmap_single(dp_soc->osdev, *nbuf,
QDF_DMA_FROM_DEVICE);
qdf_nbuf_unmap_nbytes_single(dp_soc->osdev, *nbuf,
QDF_DMA_FROM_DEVICE,
rx_desc_pool->buf_size);
qdf_nbuf_free(*nbuf);
dp_err("nbuf check x86 failed");
DP_STATS_INC(dp_pdev, replenish.x86_fail, 1);
@@ -2751,8 +2756,9 @@ dp_rx_nbuf_prepare(struct dp_soc *soc, struct dp_pdev *pdev)
memset(buf, 0, RX_DATA_BUFFER_SIZE);
ret = qdf_nbuf_map_single(soc->osdev, nbuf,
QDF_DMA_FROM_DEVICE);
ret = qdf_nbuf_map_nbytes_single(soc->osdev, nbuf,
QDF_DMA_FROM_DEVICE,
RX_DATA_BUFFER_SIZE);
/* nbuf map failed */
if (qdf_unlikely(QDF_IS_STATUS_ERROR(ret))) {