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_driver.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 */
44 /** Offloads enabled on the transmit queue */
47 unsigned int txq_entries;
48 /** Maximum size of data in the DMA descriptor */
49 uint16_t dma_desc_size_max;
50 /** DMA-mapped Tx descriptors ring */
52 /** Associated event queue size */
53 unsigned int evq_entries;
54 /** Hardware event ring */
56 /** The queue index in hardware (required to push right doorbell) */
57 unsigned int hw_index;
58 /** Virtual address of the memory-mapped BAR to push Tx doorbell */
59 volatile void *mem_bar;
60 /** VI window size shift */
61 unsigned int vi_window_shift;
65 * Get Tx datapath specific device info.
67 * @param dev_info Device info to be adjusted
69 typedef void (sfc_dp_tx_get_dev_info_t)(struct rte_eth_dev_info *dev_info);
72 * Get size of transmit and event queue rings by the number of Tx
75 * @param nb_tx_desc Number of Tx descriptors
76 * @param txq_entries Location for number of Tx ring entries
77 * @param evq_entries Location for number of event ring entries
78 * @param txq_max_fill_level Location for maximum Tx ring fill level
80 * @return 0 or positive errno.
82 typedef int (sfc_dp_tx_qsize_up_rings_t)(uint16_t nb_tx_desc,
83 unsigned int *txq_entries,
84 unsigned int *evq_entries,
85 unsigned int *txq_max_fill_level);
88 * Allocate and initialize datapath transmit queue.
90 * @param port_id The port identifier
91 * @param queue_id The queue identifier
92 * @param pci_addr PCI function address
93 * @param socket_id Socket identifier to allocate memory
94 * @param info Tx queue details wrapped in structure
95 * @param dp_txqp Location for generic datapath transmit queue pointer
97 * @return 0 or positive errno.
99 typedef int (sfc_dp_tx_qcreate_t)(uint16_t port_id, uint16_t queue_id,
100 const struct rte_pci_addr *pci_addr,
102 const struct sfc_dp_tx_qcreate_info *info,
103 struct sfc_dp_txq **dp_txqp);
106 * Free resources allocated for datapath transmit queue.
108 typedef void (sfc_dp_tx_qdestroy_t)(struct sfc_dp_txq *dp_txq);
111 * Transmit queue start callback.
113 * It handovers EvQ to the datapath.
115 typedef int (sfc_dp_tx_qstart_t)(struct sfc_dp_txq *dp_txq,
116 unsigned int evq_read_ptr,
117 unsigned int txq_desc_index);
120 * Transmit queue stop function called before the queue flush.
122 * It returns EvQ to the control path.
124 typedef void (sfc_dp_tx_qstop_t)(struct sfc_dp_txq *dp_txq,
125 unsigned int *evq_read_ptr);
128 * Transmit event handler used during queue flush only.
130 typedef bool (sfc_dp_tx_qtx_ev_t)(struct sfc_dp_txq *dp_txq, unsigned int id);
133 * Transmit queue function called after the queue flush.
135 typedef void (sfc_dp_tx_qreap_t)(struct sfc_dp_txq *dp_txq);
138 * Check Tx descriptor status
140 typedef int (sfc_dp_tx_qdesc_status_t)(struct sfc_dp_txq *dp_txq,
143 /** Transmit datapath definition */
147 unsigned int features;
148 #define SFC_DP_TX_FEAT_VLAN_INSERT 0x1
149 #define SFC_DP_TX_FEAT_TSO 0x2
150 #define SFC_DP_TX_FEAT_MULTI_SEG 0x4
151 #define SFC_DP_TX_FEAT_MULTI_PROCESS 0x8
152 #define SFC_DP_TX_FEAT_MULTI_POOL 0x10
153 #define SFC_DP_TX_FEAT_REFCNT 0x20
154 sfc_dp_tx_get_dev_info_t *get_dev_info;
155 sfc_dp_tx_qsize_up_rings_t *qsize_up_rings;
156 sfc_dp_tx_qcreate_t *qcreate;
157 sfc_dp_tx_qdestroy_t *qdestroy;
158 sfc_dp_tx_qstart_t *qstart;
159 sfc_dp_tx_qstop_t *qstop;
160 sfc_dp_tx_qtx_ev_t *qtx_ev;
161 sfc_dp_tx_qreap_t *qreap;
162 sfc_dp_tx_qdesc_status_t *qdesc_status;
163 eth_tx_burst_t pkt_burst;
166 static inline struct sfc_dp_tx *
167 sfc_dp_find_tx_by_name(struct sfc_dp_list *head, const char *name)
169 struct sfc_dp *p = sfc_dp_find_by_name(head, SFC_DP_TX, name);
171 return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
174 static inline struct sfc_dp_tx *
175 sfc_dp_find_tx_by_caps(struct sfc_dp_list *head, unsigned int avail_caps)
177 struct sfc_dp *p = sfc_dp_find_by_caps(head, SFC_DP_TX, avail_caps);
179 return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
182 extern struct sfc_dp_tx sfc_efx_tx;
183 extern struct sfc_dp_tx sfc_ef10_tx;
184 extern struct sfc_dp_tx sfc_ef10_simple_tx;
189 #endif /* _SFC_DP_TX_H */