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net/mlx5: Fix a bug of using ptp channel index as pin index

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On PTP mlx5_ptp_enable(on=0) flow, driver mistakenly used channel index
as pin index.

After ptp patch marked in fixes tag was introduced, driver can freely
call ptp_find_pin() as part of the .enable() callback.

Fix driver mlx5_ptp_enable(on=0) flow to always use ptp_find_pin(). With
that, Driver will use the correct pin index in mlx5_ptp_enable(on=0) flow.

In addition, when initializing the pins, always set channel to zero. As
all pins can be attached to all channels, let ptp_set_pinfunc() to move
them between the channels.

For stable branches, this fix to be applied only on kernels that includes
both patches in fixes tag. Otherwise, mlx5_ptp_enable(on=0) will be stuck
on pincfg_mux.

Fixes: 62582a7ee7 ("ptp: Avoid deadlocks in the programmable pin code.")
Fixes: ee7f12205a ("net/mlx5e: Implement 1PPS support")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Eran Ben Elisha 2020-07-08 18:53:19 +03:00 committed by Saeed Mahameed
parent 0e2e7aa57b
commit 88c8cf92db
1 changed files with 10 additions and 11 deletions
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21
drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
View file

@ -273,17 +273,17 @@ static int mlx5_extts_configure(struct ptp_clock_info *ptp,
if (rq->extts.index >= clock->ptp_info.n_pins)
return -EINVAL;
pin = ptp_find_pin(clock->ptp, PTP_PF_EXTTS, rq->extts.index);
if (pin < 0)
return -EBUSY;
if (on) {
pin = ptp_find_pin(clock->ptp, PTP_PF_EXTTS, rq->extts.index);
if (pin < 0)
return -EBUSY;
pin_mode = MLX5_PIN_MODE_IN;
pattern = !!(rq->extts.flags & PTP_FALLING_EDGE);
field_select = MLX5_MTPPS_FS_PIN_MODE |
MLX5_MTPPS_FS_PATTERN |
MLX5_MTPPS_FS_ENABLE;
} else {
pin = rq->extts.index;
field_select = MLX5_MTPPS_FS_ENABLE;
}
@ -331,12 +331,12 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
if (rq->perout.index >= clock->ptp_info.n_pins)
return -EINVAL;
if (on) {
pin = ptp_find_pin(clock->ptp, PTP_PF_PEROUT,
rq->perout.index);
if (pin < 0)
return -EBUSY;
pin = ptp_find_pin(clock->ptp, PTP_PF_PEROUT,
rq->perout.index);
if (pin < 0)
return -EBUSY;
if (on) {
pin_mode = MLX5_PIN_MODE_OUT;
pattern = MLX5_OUT_PATTERN_PERIODIC;
ts.tv_sec = rq->perout.period.sec;
@ -362,7 +362,6 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
MLX5_MTPPS_FS_ENABLE |
MLX5_MTPPS_FS_TIME_STAMP;
} else {
pin = rq->perout.index;
field_select = MLX5_MTPPS_FS_ENABLE;
}
@ -452,7 +451,7 @@ static int mlx5_init_pin_config(struct mlx5_clock *clock)
"mlx5_pps%d", i);
clock->ptp_info.pin_config[i].index = i;
clock->ptp_info.pin_config[i].func = PTP_PF_NONE;
clock->ptp_info.pin_config[i].chan = i;
clock->ptp_info.pin_config[i].chan = 0;
}
return 0;