ffa46fc4a2
Enabling the weight limit on a CQ allows the enqueued QEs' 2-bit weight value (representing weights of 1, 2, 4, and 8) to factor into whether a CQ is full. If the sum of the weights of the QEs in the CQ meet or exceed its weight limit, DLB will stop scheduling QEs to it (until software pops enough QEs from the CQ to reverse that). CQ weight support is enabled via the command line, and applies to DLB 2.5 (and above) load balanced ports. The DLB2 documentation will be updated with further details. Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
228 lines
6.9 KiB
C
228 lines
6.9 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2022 Intel Corporation
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include "dlb2_priv.h"
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#include "dlb2_iface.h"
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#include "dlb2_inline_fns.h"
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/*
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* This source file is only used when the compiler on the build machine
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* does not support AVX512VL.
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*/
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static uint8_t cmd_byte_map[DLB2_NUM_PORT_TYPES][DLB2_NUM_HW_SCHED_TYPES] = {
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{
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/* Load-balanced cmd bytes */
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[RTE_EVENT_OP_NEW] = DLB2_NEW_CMD_BYTE,
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[RTE_EVENT_OP_FORWARD] = DLB2_FWD_CMD_BYTE,
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[RTE_EVENT_OP_RELEASE] = DLB2_COMP_CMD_BYTE,
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},
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{
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/* Directed cmd bytes */
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[RTE_EVENT_OP_NEW] = DLB2_NEW_CMD_BYTE,
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[RTE_EVENT_OP_FORWARD] = DLB2_NEW_CMD_BYTE,
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[RTE_EVENT_OP_RELEASE] = DLB2_NOOP_CMD_BYTE,
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},
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};
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void
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dlb2_event_build_hcws(struct dlb2_port *qm_port,
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const struct rte_event ev[],
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int num,
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uint8_t *sched_type,
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uint8_t *queue_id)
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{
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struct dlb2_enqueue_qe *qe;
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uint16_t sched_word[4];
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__m128i sse_qe[2];
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int i;
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qe = qm_port->qe4;
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sse_qe[0] = _mm_setzero_si128();
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sse_qe[1] = _mm_setzero_si128();
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switch (num) {
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case 4:
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/* Construct the metadata portion of two HCWs in one 128b SSE
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* register. HCW metadata is constructed in the SSE registers
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* like so:
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* sse_qe[0][63:0]: qe[0]'s metadata
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* sse_qe[0][127:64]: qe[1]'s metadata
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* sse_qe[1][63:0]: qe[2]'s metadata
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* sse_qe[1][127:64]: qe[3]'s metadata
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*/
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/* Convert the event operation into a command byte and store it
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* in the metadata:
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* sse_qe[0][63:56] = cmd_byte_map[is_directed][ev[0].op]
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* sse_qe[0][127:120] = cmd_byte_map[is_directed][ev[1].op]
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* sse_qe[1][63:56] = cmd_byte_map[is_directed][ev[2].op]
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* sse_qe[1][127:120] = cmd_byte_map[is_directed][ev[3].op]
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*/
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#define DLB2_QE_CMD_BYTE 7
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sse_qe[0] = _mm_insert_epi8(sse_qe[0],
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cmd_byte_map[qm_port->is_directed][ev[0].op],
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DLB2_QE_CMD_BYTE);
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sse_qe[0] = _mm_insert_epi8(sse_qe[0],
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cmd_byte_map[qm_port->is_directed][ev[1].op],
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DLB2_QE_CMD_BYTE + 8);
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sse_qe[1] = _mm_insert_epi8(sse_qe[1],
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cmd_byte_map[qm_port->is_directed][ev[2].op],
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DLB2_QE_CMD_BYTE);
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sse_qe[1] = _mm_insert_epi8(sse_qe[1],
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cmd_byte_map[qm_port->is_directed][ev[3].op],
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DLB2_QE_CMD_BYTE + 8);
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/* Store priority, scheduling type, and queue ID in the sched
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* word array because these values are re-used when the
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* destination is a directed queue.
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*/
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sched_word[0] = EV_TO_DLB2_PRIO(ev[0].priority) << 10 |
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sched_type[0] << 8 |
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queue_id[0];
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sched_word[1] = EV_TO_DLB2_PRIO(ev[1].priority) << 10 |
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sched_type[1] << 8 |
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queue_id[1];
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sched_word[2] = EV_TO_DLB2_PRIO(ev[2].priority) << 10 |
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sched_type[2] << 8 |
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queue_id[2];
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sched_word[3] = EV_TO_DLB2_PRIO(ev[3].priority) << 10 |
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sched_type[3] << 8 |
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queue_id[3];
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/* Store the event priority, scheduling type, and queue ID in
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* the metadata:
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* sse_qe[0][31:16] = sched_word[0]
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* sse_qe[0][95:80] = sched_word[1]
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* sse_qe[1][31:16] = sched_word[2]
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* sse_qe[1][95:80] = sched_word[3]
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*/
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#define DLB2_QE_QID_SCHED_WORD 1
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sse_qe[0] = _mm_insert_epi16(sse_qe[0],
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sched_word[0],
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DLB2_QE_QID_SCHED_WORD);
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sse_qe[0] = _mm_insert_epi16(sse_qe[0],
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sched_word[1],
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DLB2_QE_QID_SCHED_WORD + 4);
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sse_qe[1] = _mm_insert_epi16(sse_qe[1],
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sched_word[2],
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DLB2_QE_QID_SCHED_WORD);
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sse_qe[1] = _mm_insert_epi16(sse_qe[1],
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sched_word[3],
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DLB2_QE_QID_SCHED_WORD + 4);
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/* If the destination is a load-balanced queue, store the lock
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* ID. If it is a directed queue, DLB places this field in
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* bytes 10-11 of the received QE, so we format it accordingly:
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* sse_qe[0][47:32] = dir queue ? sched_word[0] : flow_id[0]
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* sse_qe[0][111:96] = dir queue ? sched_word[1] : flow_id[1]
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* sse_qe[1][47:32] = dir queue ? sched_word[2] : flow_id[2]
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* sse_qe[1][111:96] = dir queue ? sched_word[3] : flow_id[3]
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*/
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#define DLB2_QE_LOCK_ID_WORD 2
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sse_qe[0] = _mm_insert_epi16(sse_qe[0],
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(sched_type[0] == DLB2_SCHED_DIRECTED) ?
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sched_word[0] : ev[0].flow_id,
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DLB2_QE_LOCK_ID_WORD);
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sse_qe[0] = _mm_insert_epi16(sse_qe[0],
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(sched_type[1] == DLB2_SCHED_DIRECTED) ?
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sched_word[1] : ev[1].flow_id,
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DLB2_QE_LOCK_ID_WORD + 4);
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sse_qe[1] = _mm_insert_epi16(sse_qe[1],
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(sched_type[2] == DLB2_SCHED_DIRECTED) ?
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sched_word[2] : ev[2].flow_id,
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DLB2_QE_LOCK_ID_WORD);
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sse_qe[1] = _mm_insert_epi16(sse_qe[1],
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(sched_type[3] == DLB2_SCHED_DIRECTED) ?
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sched_word[3] : ev[3].flow_id,
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DLB2_QE_LOCK_ID_WORD + 4);
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/* Store the event type and sub event type in the metadata:
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* sse_qe[0][15:0] = flow_id[0]
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* sse_qe[0][79:64] = flow_id[1]
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* sse_qe[1][15:0] = flow_id[2]
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* sse_qe[1][79:64] = flow_id[3]
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*/
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#define DLB2_QE_EV_TYPE_WORD 0
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sse_qe[0] = _mm_insert_epi16(sse_qe[0],
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ev[0].sub_event_type << 8 |
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ev[0].event_type,
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DLB2_QE_EV_TYPE_WORD);
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sse_qe[0] = _mm_insert_epi16(sse_qe[0],
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ev[1].sub_event_type << 8 |
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ev[1].event_type,
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DLB2_QE_EV_TYPE_WORD + 4);
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sse_qe[1] = _mm_insert_epi16(sse_qe[1],
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ev[2].sub_event_type << 8 |
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ev[2].event_type,
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DLB2_QE_EV_TYPE_WORD);
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sse_qe[1] = _mm_insert_epi16(sse_qe[1],
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ev[3].sub_event_type << 8 |
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ev[3].event_type,
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DLB2_QE_EV_TYPE_WORD + 4);
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/*
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* Store the metadata to memory (use the double-precision
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* _mm_storeh_pd because there is no integer function for
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* storing the upper 64b):
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* qe[0] metadata = sse_qe[0][63:0]
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* qe[1] metadata = sse_qe[0][127:64]
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* qe[2] metadata = sse_qe[1][63:0]
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* qe[3] metadata = sse_qe[1][127:64]
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*/
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_mm_storel_epi64((__m128i *)&qe[0].u.opaque_data,
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sse_qe[0]);
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_mm_storeh_pd((double *)&qe[1].u.opaque_data,
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(__m128d)sse_qe[0]);
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_mm_storel_epi64((__m128i *)&qe[2].u.opaque_data,
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sse_qe[1]);
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_mm_storeh_pd((double *)&qe[3].u.opaque_data,
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(__m128d)sse_qe[1]);
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qe[0].data = ev[0].u64;
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qe[1].data = ev[1].u64;
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qe[2].data = ev[2].u64;
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qe[3].data = ev[3].u64;
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/* will only be set for DLB 2.5 + */
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if (qm_port->cq_weight) {
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qe[0].weight = ev[0].impl_opaque & 3;
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qe[1].weight = ev[1].impl_opaque & 3;
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qe[2].weight = ev[2].impl_opaque & 3;
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qe[3].weight = ev[3].impl_opaque & 3;
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}
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break;
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case 3:
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case 2:
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case 1:
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for (i = 0; i < num; i++) {
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qe[i].cmd_byte =
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cmd_byte_map[qm_port->is_directed][ev[i].op];
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qe[i].sched_type = sched_type[i];
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qe[i].data = ev[i].u64;
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qe[i].qid = queue_id[i];
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qe[i].priority = EV_TO_DLB2_PRIO(ev[i].priority);
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qe[i].lock_id = ev[i].flow_id;
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if (sched_type[i] == DLB2_SCHED_DIRECTED) {
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struct dlb2_msg_info *info =
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(struct dlb2_msg_info *)&qe[i].lock_id;
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info->qid = queue_id[i];
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info->sched_type = DLB2_SCHED_DIRECTED;
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info->priority = qe[i].priority;
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}
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qe[i].u.event_type.major = ev[i].event_type;
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qe[i].u.event_type.sub = ev[i].sub_event_type;
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}
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break;
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case 0:
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break;
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}
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}
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