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qcacmn: Reorganize skb unmap, free and tx_desc free logic for TSO

Browse source 
In TX completion, we need to handle TSO frames release in below
sequence: Unmap skb -> free skb -> free this tx desc. Thus separate
skb unmapping and free tx descriptors for TSO logic.

CRs-Fixed: 2250960
Change-Id: I6979b4ec64e3f51bc6d8e485e843e2ab35eee86e
This commit is contained in:
chenguo 2018-03-15 18:05:46 +08:00 • committed by nshrivas
commit ee42a3202b
1 changed files with 62 additions and 32 deletions
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96
dp/wifi3.0/dp_tx.c
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@ -105,53 +105,88 @@ static inline void dp_tx_get_queue(struct dp_vdev *vdev,
#if defined(FEATURE_TSO)
/**
* dp_tx_tso_desc_release() - Release the tso segment
* after unmapping all the fragments
* dp_tx_tso_unmap_segment() - Unmap TSO segment
*
* @pdev - physical device handle
* @soc - core txrx main context
* @tx_desc - Tx software descriptor
*/
static void dp_tx_tso_unmap_segment(struct dp_soc *soc,
struct dp_tx_desc_s *tx_desc)
{
TSO_DEBUG("%s: Unmap the tso segment", __func__);
if (qdf_unlikely(!tx_desc->tso_desc)) {
QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
"%s %d TSO desc is NULL!",
__func__, __LINE__);
qdf_assert(0);
} else if (qdf_unlikely(!tx_desc->tso_num_desc)) {
QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
"%s %d TSO num desc is NULL!",
__func__, __LINE__);
qdf_assert(0);
} else {
bool is_last_seg;
struct qdf_tso_num_seg_elem_t *tso_num_desc =
(struct qdf_tso_num_seg_elem_t *)tx_desc->tso_num_desc;
if (tso_num_desc->num_seg.tso_cmn_num_seg > 1)
is_last_seg = false;
else
is_last_seg = true;
tso_num_desc->num_seg.tso_cmn_num_seg--;
qdf_nbuf_unmap_tso_segment(soc->osdev,
tx_desc->tso_desc, is_last_seg);
}
}
/**
* dp_tx_tso_desc_release() - Release the tso segment and tso_cmn_num_seg
* back to the freelist
*
* @soc - soc device handle
* @tx_desc - Tx software descriptor
*/
static void dp_tx_tso_desc_release(struct dp_soc *soc,
struct dp_tx_desc_s *tx_desc)
struct dp_tx_desc_s *tx_desc)
{
TSO_DEBUG("%s: Free the tso descriptor", __func__);
if (qdf_unlikely(tx_desc->tso_desc == NULL)) {
if (qdf_unlikely(!tx_desc->tso_desc)) {
QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
"%s %d TSO desc is NULL!",
__func__, __LINE__);
"%s %d TSO desc is NULL!",
__func__, __LINE__);
qdf_assert(0);
} else if (qdf_unlikely(tx_desc->tso_num_desc == NULL)) {
QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
"%s %d TSO common info is NULL!",
__func__, __LINE__);
} else if (qdf_unlikely(!tx_desc->tso_num_desc)) {
QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
"%s %d TSO num desc is NULL!",
__func__, __LINE__);
qdf_assert(0);
} else {
struct qdf_tso_num_seg_elem_t *tso_num_desc =
(struct qdf_tso_num_seg_elem_t *) tx_desc->tso_num_desc;
(struct qdf_tso_num_seg_elem_t *)tx_desc->tso_num_desc;
if (tso_num_desc->num_seg.tso_cmn_num_seg > 1) {
tso_num_desc->num_seg.tso_cmn_num_seg--;
qdf_nbuf_unmap_tso_segment(soc->osdev,
tx_desc->tso_desc, false);
} else {
tso_num_desc->num_seg.tso_cmn_num_seg--;
qdf_assert(tso_num_desc->num_seg.tso_cmn_num_seg == 0);
qdf_nbuf_unmap_tso_segment(soc->osdev,
tx_desc->tso_desc, true);
/* Add the tso num segment into the free list */
if (tso_num_desc->num_seg.tso_cmn_num_seg == 0) {
dp_tso_num_seg_free(soc, tx_desc->pool_id,
tx_desc->tso_num_desc);
tx_desc->tso_num_desc);
tx_desc->tso_num_desc = NULL;
}
/* Add the tso segment into the free list*/
dp_tx_tso_desc_free(soc,
tx_desc->pool_id, tx_desc->tso_desc);
tx_desc->pool_id, tx_desc->tso_desc);
tx_desc->tso_desc = NULL;
}
}
#else
static void dp_tx_tso_desc_release(struct dp_soc *soc,
struct dp_tx_desc_s *tx_desc)
static void dp_tx_tso_unmap_segment(struct dp_soc *soc,
struct dp_tx_desc_s *tx_desc)
{
}
static void dp_tx_tso_desc_release(struct dp_soc *soc,
struct dp_tx_desc_s *tx_desc)
{
return;
}
#endif
/**
@ -2351,13 +2386,8 @@ static inline void dp_tx_comp_free_buf(struct dp_soc *soc,
/* TSO free */
if (hal_tx_ext_desc_get_tso_enable(
desc->msdu_ext_desc->vaddr)) {
/* If remaining number of segment is 0
* actual TSO may unmap and free */
if (qdf_nbuf_get_users(nbuf) == 1)
__qdf_nbuf_unmap_single(soc->osdev,
nbuf,
QDF_DMA_TO_DEVICE);
/* unmap eash TSO seg before free the nbuf */
dp_tx_tso_unmap_segment(soc, desc);
qdf_nbuf_free(nbuf);
return;
}