1 /* SPDX-License-Identifier: BSD-3-Clause
3 * Copyright (c) 2016-2018 Solarflare Communications Inc.
6 * This software was jointly developed between OKTET Labs (under contract
7 * for Solarflare) and Solarflare Communications, Inc.
13 #include <rte_ethdev.h>
22 * Generic transmit queue information used on data path.
23 * It must be kept as small as it is possible since it is built into
24 * the structure used on datapath.
27 struct sfc_dp_queue dpq;
31 * Datapath transmit queue creation information.
33 * The structure is used just to pass information from control path to
34 * datapath. It could be just function arguments, but it would be hardly
37 struct sfc_dp_tx_qcreate_info {
38 /** Maximum number of pushed Tx descriptors */
39 unsigned int max_fill_level;
40 /** Minimum number of unused Tx descriptors to do reap */
41 unsigned int free_thresh;
42 /** Transmit queue configuration flags */
45 unsigned int txq_entries;
46 /** Maximum size of data in the DMA descriptor */
47 uint16_t dma_desc_size_max;
48 /** DMA-mapped Tx descriptors ring */
50 /** Associated event queue size */
51 unsigned int evq_entries;
52 /** Hardware event ring */
54 /** The queue index in hardware (required to push right doorbell) */
55 unsigned int hw_index;
56 /** Virtual address of the memory-mapped BAR to push Tx doorbell */
57 volatile void *mem_bar;
61 * Get Tx datapath specific device info.
63 * @param dev_info Device info to be adjusted
65 typedef void (sfc_dp_tx_get_dev_info_t)(struct rte_eth_dev_info *dev_info);
68 * Get size of transmit and event queue rings by the number of Tx
71 * @param nb_tx_desc Number of Tx descriptors
72 * @param txq_entries Location for number of Tx ring entries
73 * @param evq_entries Location for number of event ring entries
74 * @param txq_max_fill_level Location for maximum Tx ring fill level
76 * @return 0 or positive errno.
78 typedef int (sfc_dp_tx_qsize_up_rings_t)(uint16_t nb_tx_desc,
79 unsigned int *txq_entries,
80 unsigned int *evq_entries,
81 unsigned int *txq_max_fill_level);
84 * Allocate and initialize datapath transmit queue.
86 * @param port_id The port identifier
87 * @param queue_id The queue identifier
88 * @param pci_addr PCI function address
89 * @param socket_id Socket identifier to allocate memory
90 * @param info Tx queue details wrapped in structure
91 * @param dp_txqp Location for generic datapath transmit queue pointer
93 * @return 0 or positive errno.
95 typedef int (sfc_dp_tx_qcreate_t)(uint16_t port_id, uint16_t queue_id,
96 const struct rte_pci_addr *pci_addr,
98 const struct sfc_dp_tx_qcreate_info *info,
99 struct sfc_dp_txq **dp_txqp);
102 * Free resources allocated for datapath transmit queue.
104 typedef void (sfc_dp_tx_qdestroy_t)(struct sfc_dp_txq *dp_txq);
107 * Transmit queue start callback.
109 * It handovers EvQ to the datapath.
111 typedef int (sfc_dp_tx_qstart_t)(struct sfc_dp_txq *dp_txq,
112 unsigned int evq_read_ptr,
113 unsigned int txq_desc_index);
116 * Transmit queue stop function called before the queue flush.
118 * It returns EvQ to the control path.
120 typedef void (sfc_dp_tx_qstop_t)(struct sfc_dp_txq *dp_txq,
121 unsigned int *evq_read_ptr);
124 * Transmit event handler used during queue flush only.
126 typedef bool (sfc_dp_tx_qtx_ev_t)(struct sfc_dp_txq *dp_txq, unsigned int id);
129 * Transmit queue function called after the queue flush.
131 typedef void (sfc_dp_tx_qreap_t)(struct sfc_dp_txq *dp_txq);
134 * Check Tx descriptor status
136 typedef int (sfc_dp_tx_qdesc_status_t)(struct sfc_dp_txq *dp_txq,
139 /** Transmit datapath definition */
143 unsigned int features;
144 #define SFC_DP_TX_FEAT_VLAN_INSERT 0x1
145 #define SFC_DP_TX_FEAT_TSO 0x2
146 #define SFC_DP_TX_FEAT_MULTI_SEG 0x4
147 #define SFC_DP_TX_FEAT_MULTI_PROCESS 0x8
148 #define SFC_DP_TX_FEAT_MULTI_POOL 0x10
149 #define SFC_DP_TX_FEAT_REFCNT 0x20
150 sfc_dp_tx_get_dev_info_t *get_dev_info;
151 sfc_dp_tx_qsize_up_rings_t *qsize_up_rings;
152 sfc_dp_tx_qcreate_t *qcreate;
153 sfc_dp_tx_qdestroy_t *qdestroy;
154 sfc_dp_tx_qstart_t *qstart;
155 sfc_dp_tx_qstop_t *qstop;
156 sfc_dp_tx_qtx_ev_t *qtx_ev;
157 sfc_dp_tx_qreap_t *qreap;
158 sfc_dp_tx_qdesc_status_t *qdesc_status;
159 eth_tx_burst_t pkt_burst;
162 static inline struct sfc_dp_tx *
163 sfc_dp_find_tx_by_name(struct sfc_dp_list *head, const char *name)
165 struct sfc_dp *p = sfc_dp_find_by_name(head, SFC_DP_TX, name);
167 return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
170 static inline struct sfc_dp_tx *
171 sfc_dp_find_tx_by_caps(struct sfc_dp_list *head, unsigned int avail_caps)
173 struct sfc_dp *p = sfc_dp_find_by_caps(head, SFC_DP_TX, avail_caps);
175 return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
178 extern struct sfc_dp_tx sfc_efx_tx;
179 extern struct sfc_dp_tx sfc_ef10_tx;
180 extern struct sfc_dp_tx sfc_ef10_simple_tx;
185 #endif /* _SFC_DP_TX_H */