126 lines
4.2 KiB
C
126 lines
4.2 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
|
|
/*
|
|
* Siemens System Memory Buffer driver.
|
|
* Copyright(c) 2022, HiSilicon Limited.
|
|
*/
|
|
|
|
#ifndef _ULTRASOC_SMB_H
|
|
#define _ULTRASOC_SMB_H
|
|
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/mutex.h>
|
|
|
|
/* Offset of SMB global registers */
|
|
#define SMB_GLB_CFG_REG 0x00
|
|
#define SMB_GLB_EN_REG 0x04
|
|
#define SMB_GLB_INT_REG 0x08
|
|
|
|
/* Offset of SMB logical buffer registers */
|
|
#define SMB_LB_CFG_LO_REG 0x40
|
|
#define SMB_LB_CFG_HI_REG 0x44
|
|
#define SMB_LB_INT_CTRL_REG 0x48
|
|
#define SMB_LB_INT_STS_REG 0x4c
|
|
#define SMB_LB_RD_ADDR_REG 0x5c
|
|
#define SMB_LB_WR_ADDR_REG 0x60
|
|
#define SMB_LB_PURGE_REG 0x64
|
|
|
|
/* Set global config register */
|
|
#define SMB_GLB_CFG_BURST_LEN_MSK GENMASK(11, 4)
|
|
#define SMB_GLB_CFG_IDLE_PRD_MSK GENMASK(15, 12)
|
|
#define SMB_GLB_CFG_MEM_WR_MSK GENMASK(21, 16)
|
|
#define SMB_GLB_CFG_MEM_RD_MSK GENMASK(27, 22)
|
|
#define SMB_GLB_CFG_DEFAULT (FIELD_PREP(SMB_GLB_CFG_BURST_LEN_MSK, 0xf) | \
|
|
FIELD_PREP(SMB_GLB_CFG_IDLE_PRD_MSK, 0xf) | \
|
|
FIELD_PREP(SMB_GLB_CFG_MEM_WR_MSK, 0x3) | \
|
|
FIELD_PREP(SMB_GLB_CFG_MEM_RD_MSK, 0x1b))
|
|
|
|
#define SMB_GLB_EN_HW_ENABLE BIT(0)
|
|
|
|
/* Set global interrupt control register */
|
|
#define SMB_GLB_INT_EN BIT(0)
|
|
#define SMB_GLB_INT_PULSE BIT(1) /* Interrupt type: 1 - Pulse */
|
|
#define SMB_GLB_INT_ACT_H BIT(2) /* Interrupt polarity: 1 - Active high */
|
|
#define SMB_GLB_INT_CFG (SMB_GLB_INT_EN | SMB_GLB_INT_PULSE | \
|
|
SMB_GLB_INT_ACT_H)
|
|
|
|
/* Set logical buffer config register lower 32 bits */
|
|
#define SMB_LB_CFG_LO_EN BIT(0)
|
|
#define SMB_LB_CFG_LO_SINGLE_END BIT(1)
|
|
#define SMB_LB_CFG_LO_INIT BIT(8)
|
|
#define SMB_LB_CFG_LO_CONT BIT(11)
|
|
#define SMB_LB_CFG_LO_FLOW_MSK GENMASK(19, 16)
|
|
#define SMB_LB_CFG_LO_DEFAULT (SMB_LB_CFG_LO_EN | SMB_LB_CFG_LO_SINGLE_END | \
|
|
SMB_LB_CFG_LO_INIT | SMB_LB_CFG_LO_CONT | \
|
|
FIELD_PREP(SMB_LB_CFG_LO_FLOW_MSK, 0xf))
|
|
|
|
/* Set logical buffer config register upper 32 bits */
|
|
#define SMB_LB_CFG_HI_RANGE_UP_MSK GENMASK(15, 8)
|
|
#define SMB_LB_CFG_HI_DEFAULT FIELD_PREP(SMB_LB_CFG_HI_RANGE_UP_MSK, 0xff)
|
|
|
|
/*
|
|
* Set logical buffer interrupt control register.
|
|
* The register control the validity of both real-time events and
|
|
* interrupts. When logical buffer status changes causes to issue
|
|
* an interrupt at the same time as it issues a real-time event.
|
|
* Real-time events are used in SMB driver, which needs to get the buffer
|
|
* status. Interrupts are used in debugger mode.
|
|
* SMB_LB_INT_CTRL_BUF_NOTE_MASK control which events flags or interrupts
|
|
* are valid.
|
|
*/
|
|
#define SMB_LB_INT_CTRL_EN BIT(0)
|
|
#define SMB_LB_INT_CTRL_BUF_NOTE_MSK GENMASK(11, 8)
|
|
#define SMB_LB_INT_CTRL_CFG (SMB_LB_INT_CTRL_EN | \
|
|
FIELD_PREP(SMB_LB_INT_CTRL_BUF_NOTE_MSK, 0xf))
|
|
|
|
/* Set logical buffer interrupt status register */
|
|
#define SMB_LB_INT_STS_NOT_EMPTY_MSK BIT(0)
|
|
#define SMB_LB_INT_STS_BUF_RESET_MSK GENMASK(3, 0)
|
|
#define SMB_LB_INT_STS_RESET FIELD_PREP(SMB_LB_INT_STS_BUF_RESET_MSK, 0xf)
|
|
|
|
#define SMB_LB_PURGE_PURGED BIT(0)
|
|
|
|
#define SMB_REG_ADDR_RES 0
|
|
#define SMB_BUF_ADDR_RES 1
|
|
#define SMB_BUF_ADDR_LO_MSK GENMASK(31, 0)
|
|
|
|
/**
|
|
* struct smb_data_buffer - Details of the buffer used by SMB
|
|
* @buf_base: Memory mapped base address of SMB.
|
|
* @buf_hw_base: SMB buffer start Physical base address, only used 32bits.
|
|
* @buf_size: Size of the buffer.
|
|
* @data_size: Size of the available trace data for SMB.
|
|
* @buf_rdptr: Current read position (index) within the buffer.
|
|
*/
|
|
struct smb_data_buffer {
|
|
void *buf_base;
|
|
u32 buf_hw_base;
|
|
unsigned long buf_size;
|
|
unsigned long data_size;
|
|
unsigned long buf_rdptr;
|
|
};
|
|
|
|
/**
|
|
* struct smb_drv_data - specifics associated to an SMB component
|
|
* @base: Memory mapped base address for SMB component.
|
|
* @csdev: Component vitals needed by the framework.
|
|
* @sdb: Data buffer for SMB.
|
|
* @miscdev: Specifics to handle "/dev/xyz.smb" entry.
|
|
* @mutex: Control data access to one at a time.
|
|
* @reading: Synchronise user space access to SMB buffer.
|
|
* @pid: Process ID of the process being monitored by the
|
|
* session that is using this component.
|
|
* @mode: How this SMB is being used, perf mode or sysfs mode.
|
|
*/
|
|
struct smb_drv_data {
|
|
void __iomem *base;
|
|
struct coresight_device *csdev;
|
|
struct smb_data_buffer sdb;
|
|
struct miscdevice miscdev;
|
|
struct mutex mutex;
|
|
bool reading;
|
|
pid_t pid;
|
|
enum cs_mode mode;
|
|
};
|
|
|
|
#endif
|