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1/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */2/*3 * Siemens System Memory Buffer driver.4 * Copyright(c) 2022, HiSilicon Limited.5 */6 7#ifndef _ULTRASOC_SMB_H8#define _ULTRASOC_SMB_H9 10#include <linux/miscdevice.h>11#include <linux/spinlock.h>12 13/* Offset of SMB global registers */14#define SMB_GLB_CFG_REG 0x0015#define SMB_GLB_EN_REG 0x0416#define SMB_GLB_INT_REG 0x0817 18/* Offset of SMB logical buffer registers */19#define SMB_LB_CFG_LO_REG 0x4020#define SMB_LB_CFG_HI_REG 0x4421#define SMB_LB_INT_CTRL_REG 0x4822#define SMB_LB_INT_STS_REG 0x4c23#define SMB_LB_RD_ADDR_REG 0x5c24#define SMB_LB_WR_ADDR_REG 0x6025#define SMB_LB_PURGE_REG 0x6426 27/* Set global config register */28#define SMB_GLB_CFG_BURST_LEN_MSK GENMASK(11, 4)29#define SMB_GLB_CFG_IDLE_PRD_MSK GENMASK(15, 12)30#define SMB_GLB_CFG_MEM_WR_MSK GENMASK(21, 16)31#define SMB_GLB_CFG_MEM_RD_MSK GENMASK(27, 22)32#define SMB_GLB_CFG_DEFAULT (FIELD_PREP(SMB_GLB_CFG_BURST_LEN_MSK, 0xf) | \33 FIELD_PREP(SMB_GLB_CFG_IDLE_PRD_MSK, 0xf) | \34 FIELD_PREP(SMB_GLB_CFG_MEM_WR_MSK, 0x3) | \35 FIELD_PREP(SMB_GLB_CFG_MEM_RD_MSK, 0x1b))36 37#define SMB_GLB_EN_HW_ENABLE BIT(0)38 39/* Set global interrupt control register */40#define SMB_GLB_INT_EN BIT(0)41#define SMB_GLB_INT_PULSE BIT(1) /* Interrupt type: 1 - Pulse */42#define SMB_GLB_INT_ACT_H BIT(2) /* Interrupt polarity: 1 - Active high */43#define SMB_GLB_INT_CFG (SMB_GLB_INT_EN | SMB_GLB_INT_PULSE | \44 SMB_GLB_INT_ACT_H)45 46/* Set logical buffer config register lower 32 bits */47#define SMB_LB_CFG_LO_EN BIT(0)48#define SMB_LB_CFG_LO_SINGLE_END BIT(1)49#define SMB_LB_CFG_LO_INIT BIT(8)50#define SMB_LB_CFG_LO_CONT BIT(11)51#define SMB_LB_CFG_LO_FLOW_MSK GENMASK(19, 16)52#define SMB_LB_CFG_LO_DEFAULT (SMB_LB_CFG_LO_EN | SMB_LB_CFG_LO_SINGLE_END | \53 SMB_LB_CFG_LO_INIT | SMB_LB_CFG_LO_CONT | \54 FIELD_PREP(SMB_LB_CFG_LO_FLOW_MSK, 0xf))55 56/* Set logical buffer config register upper 32 bits */57#define SMB_LB_CFG_HI_RANGE_UP_MSK GENMASK(15, 8)58#define SMB_LB_CFG_HI_DEFAULT FIELD_PREP(SMB_LB_CFG_HI_RANGE_UP_MSK, 0xff)59 60/*61 * Set logical buffer interrupt control register.62 * The register control the validity of both real-time events and63 * interrupts. When logical buffer status changes causes to issue64 * an interrupt at the same time as it issues a real-time event.65 * Real-time events are used in SMB driver, which needs to get the buffer66 * status. Interrupts are used in debugger mode.67 * SMB_LB_INT_CTRL_BUF_NOTE_MASK control which events flags or interrupts68 * are valid.69 */70#define SMB_LB_INT_CTRL_EN BIT(0)71#define SMB_LB_INT_CTRL_BUF_NOTE_MSK GENMASK(11, 8)72#define SMB_LB_INT_CTRL_CFG (SMB_LB_INT_CTRL_EN | \73 FIELD_PREP(SMB_LB_INT_CTRL_BUF_NOTE_MSK, 0xf))74 75/* Set logical buffer interrupt status register */76#define SMB_LB_INT_STS_NOT_EMPTY_MSK BIT(0)77#define SMB_LB_INT_STS_BUF_RESET_MSK GENMASK(3, 0)78#define SMB_LB_INT_STS_RESET FIELD_PREP(SMB_LB_INT_STS_BUF_RESET_MSK, 0xf)79 80#define SMB_LB_PURGE_PURGED BIT(0)81 82#define SMB_REG_ADDR_RES 083#define SMB_BUF_ADDR_RES 184#define SMB_BUF_ADDR_LO_MSK GENMASK(31, 0)85 86/**87 * struct smb_data_buffer - Details of the buffer used by SMB88 * @buf_base: Memory mapped base address of SMB.89 * @buf_hw_base: SMB buffer start Physical base address, only used 32bits.90 * @buf_size: Size of the buffer.91 * @data_size: Size of the available trace data for SMB.92 * @buf_rdptr: Current read position (index) within the buffer.93 */94struct smb_data_buffer {95 void *buf_base;96 u32 buf_hw_base;97 unsigned long buf_size;98 unsigned long data_size;99 unsigned long buf_rdptr;100};101 102/**103 * struct smb_drv_data - specifics associated to an SMB component104 * @base: Memory mapped base address for SMB component.105 * @csdev: Component vitals needed by the framework.106 * @sdb: Data buffer for SMB.107 * @miscdev: Specifics to handle "/dev/xyz.smb" entry.108 * @spinlock: Control data access to one at a time.109 * @reading: Synchronise user space access to SMB buffer.110 * @pid: Process ID of the process being monitored by the111 * session that is using this component.112 */113struct smb_drv_data {114 void __iomem *base;115 struct coresight_device *csdev;116 struct smb_data_buffer sdb;117 struct miscdevice miscdev;118 spinlock_t spinlock;119 bool reading;120 pid_t pid;121};122 123#endif124