Differential D18545 Diff 53134 head/sys/dev/ixl/ixl_txrx.c

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head/sys/dev/ixl/ixl_txrx.c

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/* If clear is false just let caller know that there		/* If clear is false just let caller know that there
* are descriptors to reclaim */		* are descriptors to reclaim */
if (!clear)		if (!clear)
return (1);		return (1);

prev = txr->tx_cidx_processed;		prev = txr->tx_cidx_processed;
ntxd = scctx->isc_ntxd[0];		ntxd = scctx->isc_ntxd[0];
do {		do {
		MPASS(prev != cur);
delta = (int32_t)cur - (int32_t)prev;		delta = (int32_t)cur - (int32_t)prev;
/*
* XXX This appears to be a hack for first-packet.
* A correct fix would prevent prev == cur in the first place.
*/
MPASS(prev == 0 \|\| delta != 0);
if (prev == 0 && cur == 0)
delta += 1;
if (delta < 0)		if (delta < 0)
delta += ntxd;		delta += ntxd;
		MPASS(delta > 0);
#if 0		#if 0
device_printf(iflib_get_dev(vsi->ctx),		device_printf(iflib_get_dev(vsi->ctx),
"%s: (q%d) cidx_processed=%u cur=%u clear=%d delta=%d\n",		"%s: (q%d) cidx_processed=%u cur=%u clear=%d delta=%d\n",
__func__, txr->me, prev, cur, clear, delta);		__func__, txr->me, prev, cur, clear, delta);
#endif		#endif
processed += delta;		processed += delta;
prev = cur;		prev = cur;
rs_cidx = (rs_cidx + 1) & (ntxd-1);		rs_cidx = (rs_cidx + 1) & (ntxd-1);
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{		{
if_softc_ctx_t scctx = vsi->shared;		if_softc_ctx_t scctx = vsi->shared;
struct ixl_tx_queue *tx_que;		struct ixl_tx_queue *tx_que;
int i, j;		int i, j;

for (i = 0, tx_que = vsi->tx_queues; i < vsi->num_tx_queues; i++, tx_que++) {		for (i = 0, tx_que = vsi->tx_queues; i < vsi->num_tx_queues; i++, tx_que++) {
struct tx_ring *txr = &tx_que->txr;		struct tx_ring *txr = &tx_que->txr;

txr->tx_rs_cidx = txr->tx_rs_pidx = txr->tx_cidx_processed = 0;		txr->tx_rs_cidx = txr->tx_rs_pidx;

		/* Initialize the last processed descriptor to be the end of
		* the ring, rather than the start, so that we avoid an
		* off-by-one error when calculating how many descriptors are
		* done in the credits_update function.
		*/
		txr->tx_cidx_processed = scctx->isc_ntxd[0] - 1;

for (j = 0; j < scctx->isc_ntxd[0]; j++)		for (j = 0; j < scctx->isc_ntxd[0]; j++)
txr->tx_rsq[j] = QIDX_INVALID;		txr->tx_rsq[j] = QIDX_INVALID;
}		}
}		}

void		void
ixl_init_tx_cidx(struct ixl_vsi *vsi)		ixl_init_tx_cidx(struct ixl_vsi *vsi)
{		{
		if_softc_ctx_t scctx = vsi->shared;
struct ixl_tx_queue *tx_que;		struct ixl_tx_queue *tx_que;
int i;		int i;

for (i = 0, tx_que = vsi->tx_queues; i < vsi->num_tx_queues; i++, tx_que++) {		for (i = 0, tx_que = vsi->tx_queues; i < vsi->num_tx_queues; i++, tx_que++) {
struct tx_ring *txr = &tx_que->txr;		struct tx_ring *txr = &tx_que->txr;

txr->tx_cidx_processed = 0;		txr->tx_cidx_processed = scctx->isc_ntxd[0] - 1;
}		}
}		}

/*		/*
* Input: bitmap of enum virtchnl_link_speed		* Input: bitmap of enum virtchnl_link_speed
*/		*/
u64		u64
ixl_max_vc_speed_to_value(u8 link_speeds)		ixl_max_vc_speed_to_value(u8 link_speeds)
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