1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2 /* Copyright (c) 2019 Mellanox Technologies. */
4 #ifndef __MLX5_EN_TXRX_H___
5 #define __MLX5_EN_TXRX_H___
8 #include <linux/indirect_call_wrapper.h>
10 #define MLX5E_TX_WQE_EMPTY_DS_COUNT (sizeof(struct mlx5e_tx_wqe) / MLX5_SEND_WQE_DS)
12 /* The mult of MLX5_SEND_WQE_MAX_WQEBBS * MLX5_SEND_WQEBB_NUM_DS
13 * (16 * 4 == 64) does not fit in the 6-bit DS field of Ctrl Segment.
14 * We use a bound lower that MLX5_SEND_WQE_MAX_WQEBBS to let a
15 * full-session WQE be cache-aligned.
17 #if L1_CACHE_BYTES < 128
18 #define MLX5E_TX_MPW_MAX_WQEBBS (MLX5_SEND_WQE_MAX_WQEBBS - 1)
20 #define MLX5E_TX_MPW_MAX_WQEBBS (MLX5_SEND_WQE_MAX_WQEBBS - 2)
23 #define MLX5E_TX_MPW_MAX_NUM_DS (MLX5E_TX_MPW_MAX_WQEBBS * MLX5_SEND_WQEBB_NUM_DS)
25 #define INL_HDR_START_SZ (sizeof(((struct mlx5_wqe_eth_seg *)NULL)->inline_hdr.start))
27 #define MLX5E_RX_ERR_CQE(cqe) (get_cqe_opcode(cqe) != MLX5_CQE_RESP_SEND)
30 ktime_t mlx5e_cqe_ts_to_ns(cqe_ts_to_ns func, struct mlx5_clock *clock, u64 cqe_ts)
32 return INDIRECT_CALL_2(func, mlx5_real_time_cyc2time, mlx5_timecounter_cyc2time,
36 enum mlx5e_icosq_wqe_type {
38 MLX5E_ICOSQ_WQE_UMR_RX,
39 MLX5E_ICOSQ_WQE_SHAMPO_HD_UMR,
40 #ifdef CONFIG_MLX5_EN_TLS
41 MLX5E_ICOSQ_WQE_UMR_TLS,
42 MLX5E_ICOSQ_WQE_SET_PSV_TLS,
43 MLX5E_ICOSQ_WQE_GET_PSV_TLS,
48 static inline bool mlx5e_skb_is_multicast(struct sk_buff *skb)
50 return skb->pkt_type == PACKET_MULTICAST || skb->pkt_type == PACKET_BROADCAST;
53 void mlx5e_trigger_irq(struct mlx5e_icosq *sq);
54 void mlx5e_completion_event(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe);
55 void mlx5e_cq_error_event(struct mlx5_core_cq *mcq, enum mlx5_event event);
56 int mlx5e_napi_poll(struct napi_struct *napi, int budget);
57 int mlx5e_poll_ico_cq(struct mlx5e_cq *cq);
60 void mlx5e_page_dma_unmap(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info);
61 void mlx5e_page_release_dynamic(struct mlx5e_rq *rq,
62 struct mlx5e_dma_info *dma_info,
64 INDIRECT_CALLABLE_DECLARE(bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq));
65 INDIRECT_CALLABLE_DECLARE(bool mlx5e_post_rx_mpwqes(struct mlx5e_rq *rq));
66 int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget);
67 void mlx5e_free_rx_descs(struct mlx5e_rq *rq);
68 void mlx5e_free_rx_in_progress_descs(struct mlx5e_rq *rq);
71 u16 mlx5e_select_queue(struct net_device *dev, struct sk_buff *skb,
72 struct net_device *sb_dev);
73 netdev_tx_t mlx5e_xmit(struct sk_buff *skb, struct net_device *dev);
74 bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget);
75 void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq);
78 mlx5e_wqc_has_room_for(struct mlx5_wq_cyc *wq, u16 cc, u16 pc, u16 n)
80 return (mlx5_wq_cyc_ctr2ix(wq, cc - pc) >= n) || (cc == pc);
83 static inline void *mlx5e_fetch_wqe(struct mlx5_wq_cyc *wq, u16 pi, size_t wqe_size)
87 wqe = mlx5_wq_cyc_get_wqe(wq, pi);
88 memset(wqe, 0, wqe_size);
93 #define MLX5E_TX_FETCH_WQE(sq, pi) \
94 ((struct mlx5e_tx_wqe *)mlx5e_fetch_wqe(&(sq)->wq, pi, sizeof(struct mlx5e_tx_wqe)))
96 static inline struct mlx5e_tx_wqe *
97 mlx5e_post_nop(struct mlx5_wq_cyc *wq, u32 sqn, u16 *pc)
99 u16 pi = mlx5_wq_cyc_ctr2ix(wq, *pc);
100 struct mlx5e_tx_wqe *wqe = mlx5_wq_cyc_get_wqe(wq, pi);
101 struct mlx5_wqe_ctrl_seg *cseg = &wqe->ctrl;
103 memset(cseg, 0, sizeof(*cseg));
105 cseg->opmod_idx_opcode = cpu_to_be32((*pc << 8) | MLX5_OPCODE_NOP);
106 cseg->qpn_ds = cpu_to_be32((sqn << 8) | 0x01);
113 static inline struct mlx5e_tx_wqe *
114 mlx5e_post_nop_fence(struct mlx5_wq_cyc *wq, u32 sqn, u16 *pc)
116 u16 pi = mlx5_wq_cyc_ctr2ix(wq, *pc);
117 struct mlx5e_tx_wqe *wqe = mlx5_wq_cyc_get_wqe(wq, pi);
118 struct mlx5_wqe_ctrl_seg *cseg = &wqe->ctrl;
120 memset(cseg, 0, sizeof(*cseg));
122 cseg->opmod_idx_opcode = cpu_to_be32((*pc << 8) | MLX5_OPCODE_NOP);
123 cseg->qpn_ds = cpu_to_be32((sqn << 8) | 0x01);
124 cseg->fm_ce_se = MLX5_FENCE_MODE_INITIATOR_SMALL;
131 struct mlx5e_tx_wqe_info {
137 #ifdef CONFIG_MLX5_EN_TLS
138 struct page *resync_dump_frag_page;
142 static inline u16 mlx5e_txqsq_get_next_pi(struct mlx5e_txqsq *sq, u16 size)
144 struct mlx5_wq_cyc *wq = &sq->wq;
145 u16 pi, contig_wqebbs;
147 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
148 contig_wqebbs = mlx5_wq_cyc_get_contig_wqebbs(wq, pi);
149 if (unlikely(contig_wqebbs < size)) {
150 struct mlx5e_tx_wqe_info *wi, *edge_wi;
152 wi = &sq->db.wqe_info[pi];
153 edge_wi = wi + contig_wqebbs;
155 /* Fill SQ frag edge with NOPs to avoid WQE wrapping two pages. */
156 for (; wi < edge_wi; wi++) {
157 *wi = (struct mlx5e_tx_wqe_info) {
160 mlx5e_post_nop(wq, sq->sqn, &sq->pc);
162 sq->stats->nop += contig_wqebbs;
164 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
170 struct mlx5e_shampo_umr {
174 struct mlx5e_icosq_wqe_info {
178 /* Auxiliary data for different wqe types. */
183 struct mlx5e_shampo_umr shampo;
184 #ifdef CONFIG_MLX5_EN_TLS
186 struct mlx5e_ktls_offload_context_rx *priv_rx;
189 struct mlx5e_ktls_rx_resync_buf *buf;
195 void mlx5e_free_icosq_descs(struct mlx5e_icosq *sq);
197 static inline u16 mlx5e_icosq_get_next_pi(struct mlx5e_icosq *sq, u16 size)
199 struct mlx5_wq_cyc *wq = &sq->wq;
200 u16 pi, contig_wqebbs;
202 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
203 contig_wqebbs = mlx5_wq_cyc_get_contig_wqebbs(wq, pi);
204 if (unlikely(contig_wqebbs < size)) {
205 struct mlx5e_icosq_wqe_info *wi, *edge_wi;
207 wi = &sq->db.wqe_info[pi];
208 edge_wi = wi + contig_wqebbs;
210 /* Fill SQ frag edge with NOPs to avoid WQE wrapping two pages. */
211 for (; wi < edge_wi; wi++) {
212 *wi = (struct mlx5e_icosq_wqe_info) {
213 .wqe_type = MLX5E_ICOSQ_WQE_NOP,
216 mlx5e_post_nop(wq, sq->sqn, &sq->pc);
219 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
226 mlx5e_notify_hw(struct mlx5_wq_cyc *wq, u16 pc, void __iomem *uar_map,
227 struct mlx5_wqe_ctrl_seg *ctrl)
229 ctrl->fm_ce_se |= MLX5_WQE_CTRL_CQ_UPDATE;
230 /* ensure wqe is visible to device before updating doorbell record */
233 *wq->db = cpu_to_be32(pc);
235 /* ensure doorbell record is visible to device before ringing the
240 mlx5_write64((__be32 *)ctrl, uar_map);
243 static inline void mlx5e_cq_arm(struct mlx5e_cq *cq)
245 struct mlx5_core_cq *mcq;
248 mlx5_cq_arm(mcq, MLX5_CQ_DB_REQ_NOT, mcq->uar->map, cq->wq.cc);
251 static inline struct mlx5e_sq_dma *
252 mlx5e_dma_get(struct mlx5e_txqsq *sq, u32 i)
254 return &sq->db.dma_fifo[i & sq->dma_fifo_mask];
258 mlx5e_dma_push(struct mlx5e_txqsq *sq, dma_addr_t addr, u32 size,
259 enum mlx5e_dma_map_type map_type)
261 struct mlx5e_sq_dma *dma = mlx5e_dma_get(sq, sq->dma_fifo_pc++);
265 dma->type = map_type;
269 struct sk_buff **mlx5e_skb_fifo_get(struct mlx5e_skb_fifo *fifo, u16 i)
271 return &fifo->fifo[i & fifo->mask];
275 void mlx5e_skb_fifo_push(struct mlx5e_skb_fifo *fifo, struct sk_buff *skb)
277 struct sk_buff **skb_item = mlx5e_skb_fifo_get(fifo, (*fifo->pc)++);
283 struct sk_buff *mlx5e_skb_fifo_pop(struct mlx5e_skb_fifo *fifo)
285 return *mlx5e_skb_fifo_get(fifo, (*fifo->cc)++);
289 mlx5e_tx_dma_unmap(struct device *pdev, struct mlx5e_sq_dma *dma)
292 case MLX5E_DMA_MAP_SINGLE:
293 dma_unmap_single(pdev, dma->addr, dma->size, DMA_TO_DEVICE);
295 case MLX5E_DMA_MAP_PAGE:
296 dma_unmap_page(pdev, dma->addr, dma->size, DMA_TO_DEVICE);
299 WARN_ONCE(true, "mlx5e_tx_dma_unmap unknown DMA type!\n");
303 void mlx5e_sq_xmit_simple(struct mlx5e_txqsq *sq, struct sk_buff *skb, bool xmit_more);
304 void mlx5e_tx_mpwqe_ensure_complete(struct mlx5e_txqsq *sq);
306 static inline bool mlx5e_tx_mpwqe_is_full(struct mlx5e_tx_mpwqe *session)
308 return session->ds_count == MLX5E_TX_MPW_MAX_NUM_DS;
311 static inline void mlx5e_rqwq_reset(struct mlx5e_rq *rq)
313 if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ) {
314 mlx5_wq_ll_reset(&rq->mpwqe.wq);
315 rq->mpwqe.actual_wq_head = 0;
317 mlx5_wq_cyc_reset(&rq->wqe.wq);
321 static inline void mlx5e_dump_error_cqe(struct mlx5e_cq *cq, u32 qn,
322 struct mlx5_err_cqe *err_cqe)
324 struct mlx5_cqwq *wq = &cq->wq;
327 ci = mlx5_cqwq_ctr2ix(wq, wq->cc - 1);
329 netdev_err(cq->netdev,
330 "Error cqe on cqn 0x%x, ci 0x%x, qn 0x%x, opcode 0x%x, syndrome 0x%x, vendor syndrome 0x%x\n",
332 get_cqe_opcode((struct mlx5_cqe64 *)err_cqe),
333 err_cqe->syndrome, err_cqe->vendor_err_synd);
334 mlx5_dump_err_cqe(cq->mdev, err_cqe);
337 static inline u32 mlx5e_rqwq_get_size(struct mlx5e_rq *rq)
339 switch (rq->wq_type) {
340 case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
341 return mlx5_wq_ll_get_size(&rq->mpwqe.wq);
343 return mlx5_wq_cyc_get_size(&rq->wqe.wq);
347 static inline u32 mlx5e_rqwq_get_cur_sz(struct mlx5e_rq *rq)
349 switch (rq->wq_type) {
350 case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
351 return rq->mpwqe.wq.cur_sz;
353 return rq->wqe.wq.cur_sz;
357 static inline u16 mlx5e_rqwq_get_head(struct mlx5e_rq *rq)
359 switch (rq->wq_type) {
360 case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
361 return mlx5_wq_ll_get_head(&rq->mpwqe.wq);
363 return mlx5_wq_cyc_get_head(&rq->wqe.wq);
367 static inline u16 mlx5e_rqwq_get_wqe_counter(struct mlx5e_rq *rq)
369 switch (rq->wq_type) {
370 case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
371 return mlx5_wq_ll_get_counter(&rq->mpwqe.wq);
373 return mlx5_wq_cyc_get_counter(&rq->wqe.wq);
377 /* SW parser related functions */
379 struct mlx5e_swp_spec {
387 static inline void mlx5e_eseg_swp_offsets_add_vlan(struct mlx5_wqe_eth_seg *eseg)
389 /* SWP offsets are in 2-bytes words */
390 eseg->swp_outer_l3_offset += VLAN_HLEN / 2;
391 eseg->swp_outer_l4_offset += VLAN_HLEN / 2;
392 eseg->swp_inner_l3_offset += VLAN_HLEN / 2;
393 eseg->swp_inner_l4_offset += VLAN_HLEN / 2;
397 mlx5e_set_eseg_swp(struct sk_buff *skb, struct mlx5_wqe_eth_seg *eseg,
398 struct mlx5e_swp_spec *swp_spec)
400 /* SWP offsets are in 2-bytes words */
401 eseg->swp_outer_l3_offset = skb_network_offset(skb) / 2;
402 if (swp_spec->l3_proto == htons(ETH_P_IPV6))
403 eseg->swp_flags |= MLX5_ETH_WQE_SWP_OUTER_L3_IPV6;
404 if (swp_spec->l4_proto) {
405 eseg->swp_outer_l4_offset = skb_transport_offset(skb) / 2;
406 if (swp_spec->l4_proto == IPPROTO_UDP)
407 eseg->swp_flags |= MLX5_ETH_WQE_SWP_OUTER_L4_UDP;
410 if (swp_spec->is_tun) {
411 eseg->swp_inner_l3_offset = skb_inner_network_offset(skb) / 2;
412 if (swp_spec->tun_l3_proto == htons(ETH_P_IPV6))
413 eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L3_IPV6;
414 } else { /* typically for ipsec when xfrm mode != XFRM_MODE_TUNNEL */
415 eseg->swp_inner_l3_offset = skb_network_offset(skb) / 2;
416 if (swp_spec->l3_proto == htons(ETH_P_IPV6))
417 eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L3_IPV6;
419 switch (swp_spec->tun_l4_proto) {
421 eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L4_UDP;
424 eseg->swp_inner_l4_offset = skb_inner_transport_offset(skb) / 2;
429 static inline u16 mlx5e_stop_room_for_wqe(u16 wqe_size)
431 BUILD_BUG_ON(PAGE_SIZE / MLX5_SEND_WQE_BB < MLX5_SEND_WQE_MAX_WQEBBS);
433 /* A WQE must not cross the page boundary, hence two conditions:
434 * 1. Its size must not exceed the page size.
435 * 2. If the WQE size is X, and the space remaining in a page is less
436 * than X, this space needs to be padded with NOPs. So, one WQE of
437 * size X may require up to X-1 WQEBBs of padding, which makes the
438 * stop room of X-1 + X.
439 * WQE size is also limited by the hardware limit.
442 if (__builtin_constant_p(wqe_size))
443 BUILD_BUG_ON(wqe_size > MLX5_SEND_WQE_MAX_WQEBBS);
445 WARN_ON_ONCE(wqe_size > MLX5_SEND_WQE_MAX_WQEBBS);
447 return wqe_size * 2 - 1;
450 static inline bool mlx5e_icosq_can_post_wqe(struct mlx5e_icosq *sq, u16 wqe_size)
452 u16 room = sq->reserved_room + mlx5e_stop_room_for_wqe(wqe_size);
454 return mlx5e_wqc_has_room_for(&sq->wq, sq->cc, sq->pc, room);