From 9db9330a71b4e51b2835ec611a57dd11447c6708 Mon Sep 17 00:00:00 2001 From: Shijith Thotton Date: Tue, 4 May 2021 05:57:24 +0530 Subject: [PATCH] event/cnxk: add timer adapter start and stop Add event timer adapter start and stop functions. Signed-off-by: Pavan Nikhilesh Signed-off-by: Shijith Thotton --- drivers/event/cnxk/cnxk_tim_evdev.c | 71 ++++++++++++++++++++++++++++- 1 file changed, 70 insertions(+), 1 deletion(-) diff --git a/drivers/event/cnxk/cnxk_tim_evdev.c b/drivers/event/cnxk/cnxk_tim_evdev.c index a73ca33d85..19b71b4f50 100644 --- a/drivers/event/cnxk/cnxk_tim_evdev.c +++ b/drivers/event/cnxk/cnxk_tim_evdev.c @@ -246,6 +246,73 @@ cnxk_tim_ring_free(struct rte_event_timer_adapter *adptr) return 0; } +static void +cnxk_tim_calibrate_start_tsc(struct cnxk_tim_ring *tim_ring) +{ +#define CNXK_TIM_CALIB_ITER 1E6 + uint32_t real_bkt, bucket; + int icount, ecount = 0; + uint64_t bkt_cyc; + + for (icount = 0; icount < CNXK_TIM_CALIB_ITER; icount++) { + real_bkt = plt_read64(tim_ring->base + TIM_LF_RING_REL) >> 44; + bkt_cyc = cnxk_tim_cntvct(); + bucket = (bkt_cyc - tim_ring->ring_start_cyc) / + tim_ring->tck_int; + bucket = bucket % (tim_ring->nb_bkts); + tim_ring->ring_start_cyc = + bkt_cyc - (real_bkt * tim_ring->tck_int); + if (bucket != real_bkt) + ecount++; + } + tim_ring->last_updt_cyc = bkt_cyc; + plt_tim_dbg("Bucket mispredict %3.2f distance %d\n", + 100 - (((double)(icount - ecount) / (double)icount) * 100), + bucket - real_bkt); +} + +static int +cnxk_tim_ring_start(const struct rte_event_timer_adapter *adptr) +{ + struct cnxk_tim_ring *tim_ring = adptr->data->adapter_priv; + struct cnxk_tim_evdev *dev = cnxk_tim_priv_get(); + int rc; + + if (dev == NULL) + return -ENODEV; + + rc = roc_tim_lf_enable(&dev->tim, tim_ring->ring_id, + &tim_ring->ring_start_cyc, NULL); + if (rc < 0) + return rc; + + tim_ring->tck_int = NSEC2TICK(tim_ring->tck_nsec, cnxk_tim_cntfrq()); + tim_ring->tot_int = tim_ring->tck_int * tim_ring->nb_bkts; + tim_ring->fast_div = rte_reciprocal_value_u64(tim_ring->tck_int); + tim_ring->fast_bkt = rte_reciprocal_value_u64(tim_ring->nb_bkts); + + cnxk_tim_calibrate_start_tsc(tim_ring); + + return rc; +} + +static int +cnxk_tim_ring_stop(const struct rte_event_timer_adapter *adptr) +{ + struct cnxk_tim_ring *tim_ring = adptr->data->adapter_priv; + struct cnxk_tim_evdev *dev = cnxk_tim_priv_get(); + int rc; + + if (dev == NULL) + return -ENODEV; + + rc = roc_tim_lf_disable(&dev->tim, tim_ring->ring_id); + if (rc < 0) + plt_err("Failed to disable timer ring"); + + return rc; +} + static int cnxk_tim_stats_get(const struct rte_event_timer_adapter *adapter, struct rte_event_timer_adapter_stats *stats) @@ -278,13 +345,14 @@ cnxk_tim_caps_get(const struct rte_eventdev *evdev, uint64_t flags, struct cnxk_tim_evdev *dev = cnxk_tim_priv_get(); RTE_SET_USED(flags); - RTE_SET_USED(ops); if (dev == NULL) return -ENODEV; cnxk_tim_ops.init = cnxk_tim_ring_create; cnxk_tim_ops.uninit = cnxk_tim_ring_free; + cnxk_tim_ops.start = cnxk_tim_ring_start; + cnxk_tim_ops.stop = cnxk_tim_ring_stop; cnxk_tim_ops.get_info = cnxk_tim_ring_info_get; if (dev->enable_stats) { @@ -295,6 +363,7 @@ cnxk_tim_caps_get(const struct rte_eventdev *evdev, uint64_t flags, /* Store evdev pointer for later use. */ dev->event_dev = (struct rte_eventdev *)(uintptr_t)evdev; *caps = RTE_EVENT_TIMER_ADAPTER_CAP_INTERNAL_PORT; + *ops = &cnxk_tim_ops; return 0; }