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