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linux_dsm_epyc7002/include/linux/fsl/ptp_qoriq.h
Colin Ian King 58066ac9d7 ptp_qoriq: don't pass a large struct by value but instead pass it by reference 
Passing the struct ptp_clock_info caps by parameter is passing over 130 bytes
of data by value on the stack. Optimize this by passing it by reference instead.
Also shinks the object code size:

Before:
   text	   data	    bss	    dec	    hex	filename
  12596	   2160	     64	  14820	   39e4	drivers/ptp/ptp_qoriq.o

After:
   text	   data	    bss	    dec	    hex	filename
  12567	   2160	     64	  14791	   39c7	drivers/ptp/ptp_qoriq.o

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-02-19 14:15:40 -08:00

206 lines
7.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2010 OMICRON electronics GmbH
* Copyright 2018 NXP
*/
#ifndef __PTP_QORIQ_H__
#define __PTP_QORIQ_H__
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/ptp_clock_kernel.h>
/*
* qoriq ptp registers
*/
struct ctrl_regs {
u32 tmr_ctrl; /* Timer control register */
u32 tmr_tevent; /* Timestamp event register */
u32 tmr_temask; /* Timer event mask register */
u32 tmr_pevent; /* Timestamp event register */
u32 tmr_pemask; /* Timer event mask register */
u32 tmr_stat; /* Timestamp status register */
u32 tmr_cnt_h; /* Timer counter high register */
u32 tmr_cnt_l; /* Timer counter low register */
u32 tmr_add; /* Timer drift compensation addend register */
u32 tmr_acc; /* Timer accumulator register */
u32 tmr_prsc; /* Timer prescale */
u8 res1[4];
u32 tmroff_h; /* Timer offset high */
u32 tmroff_l; /* Timer offset low */
};
struct alarm_regs {
u32 tmr_alarm1_h; /* Timer alarm 1 high register */
u32 tmr_alarm1_l; /* Timer alarm 1 high register */
u32 tmr_alarm2_h; /* Timer alarm 2 high register */
u32 tmr_alarm2_l; /* Timer alarm 2 high register */
};
struct fiper_regs {
u32 tmr_fiper1; /* Timer fixed period interval */
u32 tmr_fiper2; /* Timer fixed period interval */
u32 tmr_fiper3; /* Timer fixed period interval */
};
struct etts_regs {
u32 tmr_etts1_h; /* Timestamp of general purpose external trigger */
u32 tmr_etts1_l; /* Timestamp of general purpose external trigger */
u32 tmr_etts2_h; /* Timestamp of general purpose external trigger */
u32 tmr_etts2_l; /* Timestamp of general purpose external trigger */
};
struct ptp_qoriq_registers {
struct ctrl_regs __iomem *ctrl_regs;
struct alarm_regs __iomem *alarm_regs;
struct fiper_regs __iomem *fiper_regs;
struct etts_regs __iomem *etts_regs;
};
/* Offset definitions for the four register groups */
#define ETSEC_CTRL_REGS_OFFSET 0x0
#define ETSEC_ALARM_REGS_OFFSET 0x40
#define ETSEC_FIPER_REGS_OFFSET 0x80
#define ETSEC_ETTS_REGS_OFFSET 0xa0
#define CTRL_REGS_OFFSET 0x80
#define ALARM_REGS_OFFSET 0xb8
#define FIPER_REGS_OFFSET 0xd0
#define ETTS_REGS_OFFSET 0xe0
/* Bit definitions for the TMR_CTRL register */
#define ALM1P (1<<31) /* Alarm1 output polarity */
#define ALM2P (1<<30) /* Alarm2 output polarity */
#define FIPERST (1<<28) /* FIPER start indication */
#define PP1L (1<<27) /* Fiper1 pulse loopback mode enabled. */
#define PP2L (1<<26) /* Fiper2 pulse loopback mode enabled. */
#define TCLK_PERIOD_SHIFT (16) /* 1588 timer reference clock period. */
#define TCLK_PERIOD_MASK (0x3ff)
#define RTPE (1<<15) /* Record Tx Timestamp to PAL Enable. */
#define FRD (1<<14) /* FIPER Realignment Disable */
#define ESFDP (1<<11) /* External Tx/Rx SFD Polarity. */
#define ESFDE (1<<10) /* External Tx/Rx SFD Enable. */
#define ETEP2 (1<<9) /* External trigger 2 edge polarity */
#define ETEP1 (1<<8) /* External trigger 1 edge polarity */
#define COPH (1<<7) /* Generated clock output phase. */
#define CIPH (1<<6) /* External oscillator input clock phase */
#define TMSR (1<<5) /* Timer soft reset. */
#define BYP (1<<3) /* Bypass drift compensated clock */
#define TE (1<<2) /* 1588 timer enable. */
#define CKSEL_SHIFT (0) /* 1588 Timer reference clock source */
#define CKSEL_MASK (0x3)
/* Bit definitions for the TMR_TEVENT register */
#define ETS2 (1<<25) /* External trigger 2 timestamp sampled */
#define ETS1 (1<<24) /* External trigger 1 timestamp sampled */
#define ALM2 (1<<17) /* Current time = alarm time register 2 */
#define ALM1 (1<<16) /* Current time = alarm time register 1 */
#define PP1 (1<<7) /* periodic pulse generated on FIPER1 */
#define PP2 (1<<6) /* periodic pulse generated on FIPER2 */
#define PP3 (1<<5) /* periodic pulse generated on FIPER3 */
/* Bit definitions for the TMR_TEMASK register */
#define ETS2EN (1<<25) /* External trigger 2 timestamp enable */
#define ETS1EN (1<<24) /* External trigger 1 timestamp enable */
#define ALM2EN (1<<17) /* Timer ALM2 event enable */
#define ALM1EN (1<<16) /* Timer ALM1 event enable */
#define PP1EN (1<<7) /* Periodic pulse event 1 enable */
#define PP2EN (1<<6) /* Periodic pulse event 2 enable */
/* Bit definitions for the TMR_PEVENT register */
#define TXP2 (1<<9) /* PTP transmitted timestamp im TXTS2 */
#define TXP1 (1<<8) /* PTP transmitted timestamp in TXTS1 */
#define RXP (1<<0) /* PTP frame has been received */
/* Bit definitions for the TMR_PEMASK register */
#define TXP2EN (1<<9) /* Transmit PTP packet event 2 enable */
#define TXP1EN (1<<8) /* Transmit PTP packet event 1 enable */
#define RXPEN (1<<0) /* Receive PTP packet event enable */
/* Bit definitions for the TMR_STAT register */
#define STAT_VEC_SHIFT (0) /* Timer general purpose status vector */
#define STAT_VEC_MASK (0x3f)
#define ETS1_VLD (1<<24)
#define ETS2_VLD (1<<25)
/* Bit definitions for the TMR_PRSC register */
#define PRSC_OCK_SHIFT (0) /* Output clock division/prescale factor. */
#define PRSC_OCK_MASK (0xffff)
#define DRIVER "ptp_qoriq"
#define N_EXT_TS 2
#define DEFAULT_CKSEL 1
#define DEFAULT_TMR_PRSC 2
#define DEFAULT_FIPER1_PERIOD 1000000000
#define DEFAULT_FIPER2_PERIOD 100000
struct ptp_qoriq {
void __iomem *base;
struct ptp_qoriq_registers regs;
spinlock_t lock; /* protects regs */
struct ptp_clock *clock;
struct ptp_clock_info caps;
struct resource *rsrc;
struct dentry *debugfs_root;
struct device *dev;
bool extts_fifo_support;
int irq;
int phc_index;
u64 alarm_interval; /* for periodic alarm */
u64 alarm_value;
u32 tclk_period; /* nanoseconds */
u32 tmr_prsc;
u32 tmr_add;
u32 cksel;
u32 tmr_fiper1;
u32 tmr_fiper2;
u32 (*read)(unsigned __iomem *addr);
void (*write)(unsigned __iomem *addr, u32 val);
};
static inline u32 qoriq_read_be(unsigned __iomem *addr)
{
return ioread32be(addr);
}
static inline void qoriq_write_be(unsigned __iomem *addr, u32 val)
{
iowrite32be(val, addr);
}
static inline u32 qoriq_read_le(unsigned __iomem *addr)
{
return ioread32(addr);
}
static inline void qoriq_write_le(unsigned __iomem *addr, u32 val)
{
iowrite32(val, addr);
}
irqreturn_t ptp_qoriq_isr(int irq, void *priv);
int ptp_qoriq_init(struct ptp_qoriq *ptp_qoriq, void __iomem *base,
const struct ptp_clock_info *caps);
void ptp_qoriq_free(struct ptp_qoriq *ptp_qoriq);
int ptp_qoriq_adjfine(struct ptp_clock_info *ptp, long scaled_ppm);
int ptp_qoriq_adjtime(struct ptp_clock_info *ptp, s64 delta);
int ptp_qoriq_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts);
int ptp_qoriq_settime(struct ptp_clock_info *ptp,
const struct timespec64 *ts);
int ptp_qoriq_enable(struct ptp_clock_info *ptp,
struct ptp_clock_request *rq, int on);
#ifdef CONFIG_DEBUG_FS
void ptp_qoriq_create_debugfs(struct ptp_qoriq *ptp_qoriq);
void ptp_qoriq_remove_debugfs(struct ptp_qoriq *ptp_qoriq);
#else
static inline void ptp_qoriq_create_debugfs(struct ptp_qoriq *ptp_qoriq)
{ }
static inline void ptp_qoriq_remove_debugfs(struct ptp_qoriq *ptp_qoriq)
{ }
#endif
#endif
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