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packets
In the current mechanism of timestamping, am65-cpsw-nuss driver
enables hardware timestamping for all received packets by setting
the TSTAMP_EN bit in CPTS_CONTROL register, which directs the CPTS
module to timestamp all received packets, followed by passing
timestamp via DMA descriptors. This mechanism causes CPSW Port to
Lock up.
To prevent port lock up, don't enable rx packet timestamping by
setting TSTAMP_EN bit in CPTS_CONTROL register. The workaround for
timestamping received packets is to utilize the CPTS Event FIFO
that records timestamps corresponding to certain events. The CPTS
module is configured to generate timestamps for Multicast Ethernet,
UDP/IPv4 and UDP/IPv6 PTP packets.
Update supported hwtstamp_rx_filters values for CPSW's timestamping
capability.
Fixes: b1f66a5bee07 ("net: ethernet: ti: am65-cpsw-nuss: enable packet timestamping support")
Signed-off-by: Chintan Vankar <c-vankar@ti.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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CPTS FIFO
Add a new function "am65_cpts_rx_timestamp()" which checks for PTP
packets from header and timestamps them.
Add another function "am65_cpts_find_rx_ts()" which finds CPTS FIFO
Event to get the timestamp of received PTP packet.
Signed-off-by: Chintan Vankar <c-vankar@ti.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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The am65_cpts_release() function is registered as a devm_action in the
am65_cpts_create() function in am65-cpts driver. When the am65-cpsw driver
invokes am65_cpts_create(), am65_cpts_release() is added in the set of devm
actions associated with the am65-cpsw driver's device.
In the event of probe failure or probe deferral, the platform_drv_probe()
function invokes dev_pm_domain_detach() which powers off the CPSW and the
CPSW's CPTS hardware, both of which share the same power domain. Since the
am65_cpts_disable() function invoked by the am65_cpts_release() function
attempts to reset the CPTS hardware by writing to its registers, the CPTS
hardware is assumed to be powered on at this point. However, the hardware
is powered off before the devm actions are executed.
Fix this by getting rid of the devm action for am65_cpts_release() and
invoking it directly on the cleanup and exit paths.
Fixes: f6bd59526ca5 ("net: ethernet: ti: introduce am654 common platform time sync driver")
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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CPTS looses context on suspend (e.g. on AM62).
Provide suspend/resume hooks in CPTS driver. These will be
invoked by CPSW driver if CPTS was instantiated by CPSW.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When building with Clang:
In file included from drivers/net/ethernet/ti/am65-cpsw-ethtool.c:15:
drivers/net/ethernet/ti/am65-cpts.h:58:12: warning: unused function
'am65_cpts_ns_gettime' [-Wunused-function]
static s64 am65_cpts_ns_gettime(struct am65_cpts *cpts)
^
drivers/net/ethernet/ti/am65-cpts.h:63:12: warning: unused function
'am65_cpts_estf_enable' [-Wunused-function]
static int am65_cpts_estf_enable(struct am65_cpts *cpts,
^
drivers/net/ethernet/ti/am65-cpts.h:69:13: warning: unused function
'am65_cpts_estf_disable' [-Wunused-function]
static void am65_cpts_estf_disable(struct am65_cpts *cpts, int idx)
^
3 warnings generated.
These functions need to be marked as inline, which adds __maybe_unused,
to avoid these warnings, which is the pattern for stub functions.
Fixes: ec008fa2a9e5 ("ethernet: ti: am65-cpts: add routines to support taprio offload")
Link: https://github.com/ClangBuiltLinux/linux/issues/1026
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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TAPRIO/EST offload support in CPSW2G requires EST scheduler
function enabled in CPTS. So this patch add a function to
set cycle time for EST scheduler. It also add a function for
getting time in ns of PHC clock for taprio qdisc configuration.
Mostly to verify if timer update is needed or to get actual
state of oper/admin schedule.
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The CPTS module is used to facilitate host control of time sync operations.
Main features of CPTS module are:
- selection of multiple external clock sources
- control of time sync events via interrupt or polling
- 64-bit timestamp mode in ns with HW PPM and nudge adjustment.
- hardware timestamp ext. inputs (HWx_TS_PUSH)
- timestamp Generator function outputs (TS_GENFx)
Depending on integration it enables compliance with the IEEE 1588-2008
standard for a precision clock synchronization protocol, Ethernet Enhanced
Scheduled Traffic Operations (CPTS_ESTFn) and PCIe Subsystem Precision Time
Measurement (PTM).
Introduced driver provides Linux PTP hardware clock for each CPTS device
and network packets timestamping where applicable. CPTS PTP hardware clock
supports following operations:
- Set time
- Get time
- Shift the clock by a given offset atomically
- Adjust clock frequency
- Time stamp external events
- Periodic output signals
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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