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Commit 6f34a284 authored by Michal Kalderon's avatar Michal Kalderon Committed by David S. Miller
Browse files

qed: Add LL2 slowpath handling 



For iWARP unaligned MPA flow, a slowpath event of flushing an
MPA connection that entered an unaligned state is required.
The flush ramrod is received on the ll2 queue, and a pre-registered
callback function is called to handle the flush event.

Signed-off-by: default avatarMichal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: default avatarAriel Elior <Ariel.Elior@cavium.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 89d65113

drivers/net/ethernet/qlogic/qed/qed_ll2.c

+38 −2
Original line number Diff line number Diff line
@@ -422,6 +422,41 @@ static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn, 
	data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;

}



static int

qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,

			struct qed_ll2_info *p_ll2_conn,

			union core_rx_cqe_union *p_cqe,

			unsigned long *p_lock_flags)

{

	struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;

	struct core_rx_slow_path_cqe *sp_cqe;



	sp_cqe = &p_cqe->rx_cqe_sp;

	if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {

		DP_NOTICE(p_hwfn,

			  "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",

			  sp_cqe->ramrod_cmd_id);

		return -EINVAL;

	}



	if (!p_ll2_conn->cbs.slowpath_cb) {

		DP_NOTICE(p_hwfn,

			  "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");

		return -EINVAL;

	}



	spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);



	p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,

				    p_ll2_conn->my_id,

				    le32_to_cpu(sp_cqe->opaque_data.data[0]),

				    le32_to_cpu(sp_cqe->opaque_data.data[1]));



	spin_lock_irqsave(&p_rx->lock, *p_lock_flags);



	return 0;

}



static int

qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,

			      struct qed_ll2_info *p_ll2_conn,
@@ -495,8 +530,8 @@ static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie) 


		switch (cqe->rx_cqe_sp.type) {

		case CORE_RX_CQE_TYPE_SLOW_PATH:

			DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath\n");

			rc = -EINVAL;

			rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,

						     cqe, &flags);

			break;

		case CORE_RX_CQE_TYPE_GSI_OFFLOAD:

		case CORE_RX_CQE_TYPE_REGULAR:
@@ -1214,6 +1249,7 @@ qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs) 
	p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;

	p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;

	p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;

	p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;

	p_ll2_info->cbs.cookie = cbs->cookie;



	return 0;

include/linux/qed/qed_ll2_if.h

+5 −0
Original line number Diff line number Diff line
@@ -151,11 +151,16 @@ void (*qed_ll2_release_tx_packet_cb)(void *cxt, 
				     dma_addr_t first_frag_addr,

				     bool b_last_fragment, bool b_last_packet);



typedef

void (*qed_ll2_slowpath_cb)(void *cxt, u8 connection_handle,

			    u32 opaque_data_0, u32 opaque_data_1);



struct qed_ll2_cbs {

	qed_ll2_complete_rx_packet_cb rx_comp_cb;

	qed_ll2_release_rx_packet_cb rx_release_cb;

	qed_ll2_complete_tx_packet_cb tx_comp_cb;

	qed_ll2_release_tx_packet_cb tx_release_cb;

	qed_ll2_slowpath_cb slowpath_cb;

	void *cookie;

};