nfp/nfdk/rings.c

11 nfp_nfdk_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
16 	while (!tx_ring->is_xdp && tx_ring->rd_p != tx_ring->wr_p) {
23 		rd_idx = D_IDX(tx_ring, tx_ring->rd_p);
24 		txbuf = &tx_ring->ktxbufs[rd_idx];
28 			n_descs = D_BLOCK_CPL(tx_ring->rd_p);
57 		tx_ring->rd_p += n_descs;
60 	memset(tx_ring->txds, 0, tx_ring->size);
61 	tx_ring->data_pending = 0;
62 	tx_ring->wr_p = 0;
63 	tx_ring->rd_p = 0;
64 	tx_ring->qcp_rd_p = 0;
65 	tx_ring->wr_ptr_add = 0;
67 	if (tx_ring->is_xdp || !dp->netdev)
70 	nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx);
74 static void nfp_nfdk_tx_ring_free(struct nfp_net_tx_ring *tx_ring)
76 	struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
79 	kvfree(tx_ring->ktxbufs);
81 	if (tx_ring->ktxds)
82 		dma_free_coherent(dp->dev, tx_ring->size,
83 				  tx_ring->ktxds, tx_ring->dma);
85 	tx_ring->cnt = 0;
86 	tx_ring->txbufs = NULL;
87 	tx_ring->txds = NULL;
88 	tx_ring->dma = 0;
89 	tx_ring->size = 0;
93 nfp_nfdk_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
95 	struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
97 	tx_ring->cnt = dp->txd_cnt * NFDK_TX_DESC_PER_SIMPLE_PKT;
98 	tx_ring->size = array_size(tx_ring->cnt, sizeof(*tx_ring->ktxds));
99 	tx_ring->ktxds = dma_alloc_coherent(dp->dev, tx_ring->size,
100 					    &tx_ring->dma,
102 	if (!tx_ring->ktxds) {
104 			    tx_ring->cnt);
108 	tx_ring->ktxbufs = kvcalloc(tx_ring->cnt, sizeof(*tx_ring->ktxbufs),
110 	if (!tx_ring->ktxbufs)
113 	if (!tx_ring->is_xdp && dp->netdev)
115 				    tx_ring->idx);
120 	nfp_nfdk_tx_ring_free(tx_ring);
126 			   struct nfp_net_tx_ring *tx_ring)
132 			    struct nfp_net_tx_ring *tx_ring)
140 			struct nfp_net_tx_ring *tx_ring,
144 	u32 txd_cnt = tx_ring->cnt;
148 		txd = &tx_ring->ktxds[i];
151 			   txd->vals[0], txd->vals[1], tx_ring->ktxbufs[i].raw);
153 		if (i == tx_ring->rd_p % txd_cnt)
155 		if (i == tx_ring->wr_p % txd_cnt)