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event/cnxk: add timer adapter start and stop

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Add event timer adapter start and stop functions.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Signed-off-by: Shijith Thotton <sthotton@marvell.com>
This commit is contained in:
Shijith Thotton 2021-05-04 05:57:24 +05:30 committed by Jerin Jacob
parent 853623b9e5
commit 9db9330a71
1 changed files with 70 additions and 1 deletions
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71
drivers/event/cnxk/cnxk_tim_evdev.c
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@ -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;
}