1 /* SPDX-License-Identifier: BSD-3-Clause
3 * Copyright(c) 2019-2021 Xilinx, Inc.
4 * Copyright(c) 2017-2019 Solarflare Communications Inc.
6 * This software was jointly developed between OKTET Labs (under contract
7 * for Solarflare) and Solarflare Communications, Inc.
13 #include <rte_mempool.h>
14 #include <ethdev_driver.h>
23 * Generic receive queue information used on data path.
24 * It must be kept as small as it is possible since it is built into
25 * the structure used on datapath.
28 struct sfc_dp_queue dpq;
31 /** Datapath receive queue descriptor number limitations */
32 struct sfc_dp_rx_hw_limits {
33 unsigned int rxq_max_entries;
34 unsigned int rxq_min_entries;
35 unsigned int evq_max_entries;
36 unsigned int evq_min_entries;
40 * Datapath receive queue creation information.
42 * The structure is used just to pass information from control path to
43 * datapath. It could be just function arguments, but it would be hardly
46 struct sfc_dp_rx_qcreate_info {
47 /** Memory pool to allocate Rx buffer from */
48 struct rte_mempool *refill_mb_pool;
49 /** Maximum number of pushed Rx descriptors in the queue */
50 unsigned int max_fill_level;
51 /** Minimum number of unused Rx descriptors to do refill */
52 unsigned int refill_threshold;
54 * Usable mbuf data space in accordance with alignment and
55 * padding requirements imposed by HW.
57 unsigned int buf_size;
60 * Maximum number of Rx descriptors completed in one Rx event.
61 * Just for sanity checks if datapath would like to do.
63 unsigned int batch_max;
65 /** Pseudo-header size */
66 unsigned int prefix_size;
68 /** Receive queue flags initializer */
70 #define SFC_RXQ_FLAG_RSS_HASH 0x1
73 unsigned int rxq_entries;
74 /** DMA-mapped Rx descriptors ring */
77 /** Event queue index in hardware */
78 unsigned int evq_hw_index;
79 /** Associated event queue size */
80 unsigned int evq_entries;
81 /** Hardware event ring */
84 /** The queue index in hardware (required to push right doorbell) */
85 unsigned int hw_index;
87 * Virtual address of the memory-mapped BAR to push Rx refill
90 volatile void *mem_bar;
91 /** Function control window offset */
92 efsys_dma_addr_t fcw_offset;
93 /** VI window size shift */
94 unsigned int vi_window_shift;
98 * Get Rx datapath specific device info.
100 * @param dev_info Device info to be adjusted
102 typedef void (sfc_dp_rx_get_dev_info_t)(struct rte_eth_dev_info *dev_info);
105 * Test if an Rx datapath supports specific mempool ops.
107 * @param pool The name of the pool operations to test.
109 * @return Check status.
110 * @retval 0 Best mempool ops choice.
111 * @retval 1 Mempool ops are supported.
112 * @retval -ENOTSUP Mempool ops not supported.
114 typedef int (sfc_dp_rx_pool_ops_supported_t)(const char *pool);
117 * Get size of receive and event queue rings by the number of Rx
118 * descriptors and mempool configuration.
120 * @param nb_rx_desc Number of Rx descriptors
121 * @param mb_pool mbuf pool with Rx buffers
122 * @param rxq_entries Location for number of Rx ring entries
123 * @param evq_entries Location for number of event ring entries
124 * @param rxq_max_fill_level Location for maximum Rx ring fill level
126 * @return 0 or positive errno.
128 typedef int (sfc_dp_rx_qsize_up_rings_t)(uint16_t nb_rx_desc,
129 struct sfc_dp_rx_hw_limits *limits,
130 struct rte_mempool *mb_pool,
131 unsigned int *rxq_entries,
132 unsigned int *evq_entries,
133 unsigned int *rxq_max_fill_level);
136 * Allocate and initialize datapath receive queue.
138 * @param port_id The port identifier
139 * @param queue_id The queue identifier
140 * @param pci_addr PCI function address
141 * @param socket_id Socket identifier to allocate memory
142 * @param info Receive queue information
143 * @param dp_rxqp Location for generic datapath receive queue pointer
145 * @return 0 or positive errno.
147 typedef int (sfc_dp_rx_qcreate_t)(uint16_t port_id, uint16_t queue_id,
148 const struct rte_pci_addr *pci_addr,
150 const struct sfc_dp_rx_qcreate_info *info,
151 struct sfc_dp_rxq **dp_rxqp);
154 * Free resources allocated for datapath recevie queue.
156 typedef void (sfc_dp_rx_qdestroy_t)(struct sfc_dp_rxq *dp_rxq);
159 * Receive queue start callback.
161 * It handovers EvQ to the datapath.
163 typedef int (sfc_dp_rx_qstart_t)(struct sfc_dp_rxq *dp_rxq,
164 unsigned int evq_read_ptr,
165 const efx_rx_prefix_layout_t *pinfo);
168 * Receive queue stop function called before flush.
170 typedef void (sfc_dp_rx_qstop_t)(struct sfc_dp_rxq *dp_rxq,
171 unsigned int *evq_read_ptr);
174 * Receive event handler used during queue flush only.
176 typedef bool (sfc_dp_rx_qrx_ev_t)(struct sfc_dp_rxq *dp_rxq, unsigned int id);
179 * Packed stream receive event handler used during queue flush only.
181 typedef bool (sfc_dp_rx_qrx_ps_ev_t)(struct sfc_dp_rxq *dp_rxq,
185 * Receive queue purge function called after queue flush.
187 * Should be used to free unused recevie buffers.
189 typedef void (sfc_dp_rx_qpurge_t)(struct sfc_dp_rxq *dp_rxq);
191 /** Get packet types recognized/classified */
192 typedef const uint32_t * (sfc_dp_rx_supported_ptypes_get_t)(
193 uint32_t tunnel_encaps);
195 /** Get number of pending Rx descriptors */
196 typedef unsigned int (sfc_dp_rx_qdesc_npending_t)(struct sfc_dp_rxq *dp_rxq);
198 /** Check Rx descriptor status */
199 typedef int (sfc_dp_rx_qdesc_status_t)(struct sfc_dp_rxq *dp_rxq,
201 /** Enable Rx interrupts */
202 typedef int (sfc_dp_rx_intr_enable_t)(struct sfc_dp_rxq *dp_rxq);
204 /** Disable Rx interrupts */
205 typedef int (sfc_dp_rx_intr_disable_t)(struct sfc_dp_rxq *dp_rxq);
207 /** Get number of pushed Rx buffers */
208 typedef unsigned int (sfc_dp_rx_get_pushed_t)(struct sfc_dp_rxq *dp_rxq);
210 /** Receive datapath definition */
214 unsigned int features;
215 #define SFC_DP_RX_FEAT_MULTI_PROCESS 0x1
216 #define SFC_DP_RX_FEAT_FLOW_FLAG 0x2
217 #define SFC_DP_RX_FEAT_FLOW_MARK 0x4
218 #define SFC_DP_RX_FEAT_INTR 0x8
219 #define SFC_DP_RX_FEAT_STATS 0x10
221 * Rx offload capabilities supported by the datapath on device
222 * level only if HW/FW supports it.
224 uint64_t dev_offload_capa;
226 * Rx offload capabilities supported by the datapath per-queue
227 * if HW/FW supports it.
229 uint64_t queue_offload_capa;
230 sfc_dp_rx_get_dev_info_t *get_dev_info;
231 sfc_dp_rx_pool_ops_supported_t *pool_ops_supported;
232 sfc_dp_rx_qsize_up_rings_t *qsize_up_rings;
233 sfc_dp_rx_qcreate_t *qcreate;
234 sfc_dp_rx_qdestroy_t *qdestroy;
235 sfc_dp_rx_qstart_t *qstart;
236 sfc_dp_rx_qstop_t *qstop;
237 sfc_dp_rx_qrx_ev_t *qrx_ev;
238 sfc_dp_rx_qrx_ps_ev_t *qrx_ps_ev;
239 sfc_dp_rx_qpurge_t *qpurge;
240 sfc_dp_rx_supported_ptypes_get_t *supported_ptypes_get;
241 sfc_dp_rx_qdesc_npending_t *qdesc_npending;
242 sfc_dp_rx_qdesc_status_t *qdesc_status;
243 sfc_dp_rx_intr_enable_t *intr_enable;
244 sfc_dp_rx_intr_disable_t *intr_disable;
245 sfc_dp_rx_get_pushed_t *get_pushed;
246 eth_rx_burst_t pkt_burst;
249 static inline struct sfc_dp_rx *
250 sfc_dp_find_rx_by_name(struct sfc_dp_list *head, const char *name)
252 struct sfc_dp *p = sfc_dp_find_by_name(head, SFC_DP_RX, name);
254 return (p == NULL) ? NULL : container_of(p, struct sfc_dp_rx, dp);
257 static inline struct sfc_dp_rx *
258 sfc_dp_find_rx_by_caps(struct sfc_dp_list *head, unsigned int avail_caps)
260 struct sfc_dp *p = sfc_dp_find_by_caps(head, SFC_DP_RX, avail_caps);
262 return (p == NULL) ? NULL : container_of(p, struct sfc_dp_rx, dp);
265 static inline uint64_t
266 sfc_dp_rx_offload_capa(const struct sfc_dp_rx *dp_rx)
268 return dp_rx->dev_offload_capa | dp_rx->queue_offload_capa;
271 /** Get Rx datapath ops by the datapath RxQ handle */
272 const struct sfc_dp_rx *sfc_dp_rx_by_dp_rxq(const struct sfc_dp_rxq *dp_rxq);
274 extern struct sfc_dp_rx sfc_efx_rx;
275 extern struct sfc_dp_rx sfc_ef10_rx;
276 extern struct sfc_dp_rx sfc_ef10_essb_rx;
277 extern struct sfc_dp_rx sfc_ef100_rx;
282 #endif /* _SFC_DP_RX_H */