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net: ethernet: ti: am65-cpsw-qos: Add support to taprio for past base_time

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If the base-time for taprio is in the past, start the schedule at the time
of the form "base_time + N*cycle_time" where N is the smallest possible
integer such that the above time is in the future.

Signed-off-by: Tanmay Patil <t-patil@ti.com>
Signed-off-by: Chintan Vankar <c-vankar@ti.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tanmay Patil 2024-04-25 16:01:42 +05:30 committed by David S. Miller
parent 5c4c0edca6
commit d63394abc9
1 changed files with 13 additions and 3 deletions
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16
drivers/net/ethernet/ti/am65-cpsw-qos.c
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@ -9,6 +9,7 @@
#include <linux/pm_runtime.h>
#include <linux/math.h>
#include <linux/math64.h>
#include <linux/time.h>
#include <linux/units.h>
#include <net/pkt_cls.h>
@ -837,6 +838,7 @@ static int am65_cpsw_taprio_replace(struct net_device *ndev,
struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
struct am65_cpts *cpts = common->cpts;
struct am65_cpsw_est *est_new;
u64 cur_time, n;
int ret, tact;
if (!netif_running(ndev)) {
@ -888,13 +890,21 @@ static int am65_cpsw_taprio_replace(struct net_device *ndev,
if (tact == TACT_PROG)
am65_cpsw_timer_stop(ndev);
if (!est_new->taprio.base_time)
est_new->taprio.base_time = am65_cpts_ns_gettime(cpts);
am65_cpsw_port_est_get_buf_num(ndev, est_new);
am65_cpsw_est_set_sched_list(ndev, est_new);
am65_cpsw_port_est_assign_buf_num(ndev, est_new->buf);
/* If the base-time is in the past, start schedule from the time:
* base_time + (N*cycle_time)
* where N is the smallest possible integer such that the above
* time is in the future.
*/
cur_time = am65_cpts_ns_gettime(cpts);
if (est_new->taprio.base_time < cur_time) {
n = div64_u64(cur_time - est_new->taprio.base_time, est_new->taprio.cycle_time);
est_new->taprio.base_time += (n + 1) * est_new->taprio.cycle_time;
}
am65_cpsw_est_set(ndev, 1);
if (tact == TACT_PROG) {