c03a6fd398
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: b1f66a5bee ("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>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/* TI K3 AM65 CPTS driver interface
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*
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* Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com
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*/
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#ifndef K3_CPTS_H_
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#define K3_CPTS_H_
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#include <linux/device.h>
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#include <linux/of.h>
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struct am65_cpts;
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struct am65_cpts_estf_cfg {
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u64 ns_period;
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u64 ns_start;
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};
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#if IS_ENABLED(CONFIG_TI_K3_AM65_CPTS)
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void am65_cpts_release(struct am65_cpts *cpts);
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struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs,
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struct device_node *node);
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int am65_cpts_phc_index(struct am65_cpts *cpts);
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void am65_cpts_rx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb);
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void am65_cpts_tx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb);
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void am65_cpts_prep_tx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb);
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u64 am65_cpts_ns_gettime(struct am65_cpts *cpts);
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int am65_cpts_estf_enable(struct am65_cpts *cpts, int idx,
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struct am65_cpts_estf_cfg *cfg);
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void am65_cpts_estf_disable(struct am65_cpts *cpts, int idx);
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void am65_cpts_suspend(struct am65_cpts *cpts);
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void am65_cpts_resume(struct am65_cpts *cpts);
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#else
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static inline void am65_cpts_release(struct am65_cpts *cpts)
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{
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}
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static inline struct am65_cpts *am65_cpts_create(struct device *dev,
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void __iomem *regs,
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struct device_node *node)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline int am65_cpts_phc_index(struct am65_cpts *cpts)
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{
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return -1;
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}
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static inline void am65_cpts_rx_timestamp(struct am65_cpts *cpts,
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struct sk_buff *skb)
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{
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}
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static inline void am65_cpts_tx_timestamp(struct am65_cpts *cpts,
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struct sk_buff *skb)
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{
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}
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static inline void am65_cpts_prep_tx_timestamp(struct am65_cpts *cpts,
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struct sk_buff *skb)
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{
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}
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static inline s64 am65_cpts_ns_gettime(struct am65_cpts *cpts)
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{
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return 0;
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}
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static inline int am65_cpts_estf_enable(struct am65_cpts *cpts, int idx,
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struct am65_cpts_estf_cfg *cfg)
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{
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return 0;
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}
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static inline void am65_cpts_estf_disable(struct am65_cpts *cpts, int idx)
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{
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}
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static inline void am65_cpts_suspend(struct am65_cpts *cpts)
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{
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}
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static inline void am65_cpts_resume(struct am65_cpts *cpts)
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{
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}
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#endif
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#endif /* K3_CPTS_H_ */
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