DPDK  17.05.2
rte_sched.h
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1 /*-
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4  * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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33 
34 #ifndef __INCLUDE_RTE_SCHED_H__
35 #define __INCLUDE_RTE_SCHED_H__
36 
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40 
88 #include <sys/types.h>
89 #include <rte_mbuf.h>
90 #include <rte_meter.h>
91 
93 #ifdef RTE_SCHED_RED
94 #include "rte_red.h"
95 #endif
96 
100 #define RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE 4
101 
103 #define RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS 4
104 
106 #define RTE_SCHED_QUEUES_PER_PIPE \
107  (RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE * \
108  RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS)
109 
113 #ifndef RTE_SCHED_PIPE_PROFILES_PER_PORT
114 #define RTE_SCHED_PIPE_PROFILES_PER_PORT 256
115 #endif
116 
117 /*
118  * Ethernet framing overhead. Overhead fields per Ethernet frame:
119  * 1. Preamble: 7 bytes;
120  * 2. Start of Frame Delimiter (SFD): 1 byte;
121  * 3. Frame Check Sequence (FCS): 4 bytes;
122  * 4. Inter Frame Gap (IFG): 12 bytes.
123  *
124  * The FCS is considered overhead only if not included in the packet
125  * length (field pkt_len of struct rte_mbuf).
126  */
127 #ifndef RTE_SCHED_FRAME_OVERHEAD_DEFAULT
128 #define RTE_SCHED_FRAME_OVERHEAD_DEFAULT 24
129 #endif
130 
131 /*
132  * Subport configuration parameters. The period and credits_per_period
133  * parameters are measured in bytes, with one byte meaning the time
134  * duration associated with the transmission of one byte on the
135  * physical medium of the output port, with pipe or pipe traffic class
136  * rate (measured as percentage of output port rate) determined as
137  * credits_per_period divided by period. One credit represents one
138  * byte.
139  */
140 struct rte_sched_subport_params {
141  /* Subport token bucket */
142  uint32_t tb_rate;
143  uint32_t tb_size;
145  /* Subport traffic classes */
146  uint32_t tc_rate[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
148  uint32_t tc_period;
150 };
151 
153 struct rte_sched_subport_stats {
154  /* Packets */
155  uint32_t n_pkts_tc[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
157  uint32_t n_pkts_tc_dropped[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
160  /* Bytes */
161  uint32_t n_bytes_tc[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
163  uint32_t n_bytes_tc_dropped[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
166 #ifdef RTE_SCHED_RED
167  uint32_t n_pkts_red_dropped[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
169 #endif
170 };
171 
172 /*
173  * Pipe configuration parameters. The period and credits_per_period
174  * parameters are measured in bytes, with one byte meaning the time
175  * duration associated with the transmission of one byte on the
176  * physical medium of the output port, with pipe or pipe traffic class
177  * rate (measured as percentage of output port rate) determined as
178  * credits_per_period divided by period. One credit represents one
179  * byte.
180  */
181 struct rte_sched_pipe_params {
182  /* Pipe token bucket */
183  uint32_t tb_rate;
184  uint32_t tb_size;
186  /* Pipe traffic classes */
187  uint32_t tc_rate[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
189  uint32_t tc_period;
191 #ifdef RTE_SCHED_SUBPORT_TC_OV
192  uint8_t tc_ov_weight;
193 #endif
194 
195  /* Pipe queues */
196  uint8_t wrr_weights[RTE_SCHED_QUEUES_PER_PIPE];
197 };
198 
200 struct rte_sched_queue_stats {
201  /* Packets */
202  uint32_t n_pkts;
203  uint32_t n_pkts_dropped;
204 #ifdef RTE_SCHED_RED
205  uint32_t n_pkts_red_dropped;
206 #endif
207 
208  /* Bytes */
209  uint32_t n_bytes;
210  uint32_t n_bytes_dropped;
211 };
212 
214 struct rte_sched_port_params {
215  const char *name;
216  int socket;
217  uint32_t rate;
219  uint32_t mtu;
222  uint32_t frame_overhead;
224  uint32_t n_subports_per_port;
225  uint32_t n_pipes_per_subport;
226  uint16_t qsize[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
231  struct rte_sched_pipe_params *pipe_profiles;
234  uint32_t n_pipe_profiles;
235 #ifdef RTE_SCHED_RED
236  struct rte_red_params red_params[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE][e_RTE_METER_COLORS];
237 #endif
238 };
239 
240 /*
241  * Configuration
242  *
243  ***/
244 
253 struct rte_sched_port *
254 rte_sched_port_config(struct rte_sched_port_params *params);
255 
262 void
263 rte_sched_port_free(struct rte_sched_port *port);
264 
277 int
278 rte_sched_subport_config(struct rte_sched_port *port,
279  uint32_t subport_id,
280  struct rte_sched_subport_params *params);
281 
296 int
297 rte_sched_pipe_config(struct rte_sched_port *port,
298  uint32_t subport_id,
299  uint32_t pipe_id,
300  int32_t pipe_profile);
301 
310 uint32_t
311 rte_sched_port_get_memory_footprint(struct rte_sched_port_params *params);
312 
313 /*
314  * Statistics
315  *
316  ***/
317 
334 int
335 rte_sched_subport_read_stats(struct rte_sched_port *port,
336  uint32_t subport_id,
337  struct rte_sched_subport_stats *stats,
338  uint32_t *tc_ov);
339 
356 int
357 rte_sched_queue_read_stats(struct rte_sched_port *port,
358  uint32_t queue_id,
359  struct rte_sched_queue_stats *stats,
360  uint16_t *qlen);
361 
379 void
380 rte_sched_port_pkt_write(struct rte_mbuf *pkt,
381  uint32_t subport, uint32_t pipe, uint32_t traffic_class,
382  uint32_t queue, enum rte_meter_color color);
383 
402 void
403 rte_sched_port_pkt_read_tree_path(const struct rte_mbuf *pkt,
404  uint32_t *subport, uint32_t *pipe,
405  uint32_t *traffic_class, uint32_t *queue);
406 
407 enum rte_meter_color
408 rte_sched_port_pkt_read_color(const struct rte_mbuf *pkt);
409 
428 int
429 rte_sched_port_enqueue(struct rte_sched_port *port, struct rte_mbuf **pkts, uint32_t n_pkts);
430 
448 int
449 rte_sched_port_dequeue(struct rte_sched_port *port, struct rte_mbuf **pkts, uint32_t n_pkts);
450 
451 #ifdef __cplusplus
452 }
453 #endif
454 
455 #endif /* __INCLUDE_RTE_SCHED_H__ */
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