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 /** Offloads enabled on the transmit queue */
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;
58 /** VI window size shift */
59 unsigned int vi_window_shift;
63 * Get Tx datapath specific device info.
65 * @param dev_info Device info to be adjusted
67 typedef void (sfc_dp_tx_get_dev_info_t)(struct rte_eth_dev_info *dev_info);
70 * Get size of transmit and event queue rings by the number of Tx
73 * @param nb_tx_desc Number of Tx descriptors
74 * @param txq_entries Location for number of Tx ring entries
75 * @param evq_entries Location for number of event ring entries
76 * @param txq_max_fill_level Location for maximum Tx ring fill level
78 * @return 0 or positive errno.
80 typedef int (sfc_dp_tx_qsize_up_rings_t)(uint16_t nb_tx_desc,
81 unsigned int *txq_entries,
82 unsigned int *evq_entries,
83 unsigned int *txq_max_fill_level);
86 * Allocate and initialize datapath transmit queue.
88 * @param port_id The port identifier
89 * @param queue_id The queue identifier
90 * @param pci_addr PCI function address
91 * @param socket_id Socket identifier to allocate memory
92 * @param info Tx queue details wrapped in structure
93 * @param dp_txqp Location for generic datapath transmit queue pointer
95 * @return 0 or positive errno.
97 typedef int (sfc_dp_tx_qcreate_t)(uint16_t port_id, uint16_t queue_id,
98 const struct rte_pci_addr *pci_addr,
100 const struct sfc_dp_tx_qcreate_info *info,
101 struct sfc_dp_txq **dp_txqp);
104 * Free resources allocated for datapath transmit queue.
106 typedef void (sfc_dp_tx_qdestroy_t)(struct sfc_dp_txq *dp_txq);
109 * Transmit queue start callback.
111 * It handovers EvQ to the datapath.
113 typedef int (sfc_dp_tx_qstart_t)(struct sfc_dp_txq *dp_txq,
114 unsigned int evq_read_ptr,
115 unsigned int txq_desc_index);
118 * Transmit queue stop function called before the queue flush.
120 * It returns EvQ to the control path.
122 typedef void (sfc_dp_tx_qstop_t)(struct sfc_dp_txq *dp_txq,
123 unsigned int *evq_read_ptr);
126 * Transmit event handler used during queue flush only.
128 typedef bool (sfc_dp_tx_qtx_ev_t)(struct sfc_dp_txq *dp_txq, unsigned int id);
131 * Transmit queue function called after the queue flush.
133 typedef void (sfc_dp_tx_qreap_t)(struct sfc_dp_txq *dp_txq);
136 * Check Tx descriptor status
138 typedef int (sfc_dp_tx_qdesc_status_t)(struct sfc_dp_txq *dp_txq,
141 /** Transmit datapath definition */
145 unsigned int features;
146 #define SFC_DP_TX_FEAT_VLAN_INSERT 0x1
147 #define SFC_DP_TX_FEAT_TSO 0x2
148 #define SFC_DP_TX_FEAT_MULTI_SEG 0x4
149 #define SFC_DP_TX_FEAT_MULTI_PROCESS 0x8
150 #define SFC_DP_TX_FEAT_MULTI_POOL 0x10
151 #define SFC_DP_TX_FEAT_REFCNT 0x20
152 sfc_dp_tx_get_dev_info_t *get_dev_info;
153 sfc_dp_tx_qsize_up_rings_t *qsize_up_rings;
154 sfc_dp_tx_qcreate_t *qcreate;
155 sfc_dp_tx_qdestroy_t *qdestroy;
156 sfc_dp_tx_qstart_t *qstart;
157 sfc_dp_tx_qstop_t *qstop;
158 sfc_dp_tx_qtx_ev_t *qtx_ev;
159 sfc_dp_tx_qreap_t *qreap;
160 sfc_dp_tx_qdesc_status_t *qdesc_status;
161 eth_tx_burst_t pkt_burst;
164 static inline struct sfc_dp_tx *
165 sfc_dp_find_tx_by_name(struct sfc_dp_list *head, const char *name)
167 struct sfc_dp *p = sfc_dp_find_by_name(head, SFC_DP_TX, name);
169 return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
172 static inline struct sfc_dp_tx *
173 sfc_dp_find_tx_by_caps(struct sfc_dp_list *head, unsigned int avail_caps)
175 struct sfc_dp *p = sfc_dp_find_by_caps(head, SFC_DP_TX, avail_caps);
177 return (p == NULL) ? NULL : container_of(p, struct sfc_dp_tx, dp);
180 extern struct sfc_dp_tx sfc_efx_tx;
181 extern struct sfc_dp_tx sfc_ef10_tx;
182 extern struct sfc_dp_tx sfc_ef10_simple_tx;
187 #endif /* _SFC_DP_TX_H */