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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * AMD Secure Processor driver4 *5 * Copyright (C) 2017-2019 Advanced Micro Devices, Inc.6 *7 * Author: Tom Lendacky <thomas.lendacky@amd.com>8 * Author: Gary R Hook <gary.hook@amd.com>9 * Author: Brijesh Singh <brijesh.singh@amd.com>10 */11 12#ifndef __SP_DEV_H__13#define __SP_DEV_H__14 15#include <linux/device.h>16#include <linux/spinlock.h>17#include <linux/mutex.h>18#include <linux/list.h>19#include <linux/wait.h>20#include <linux/dmapool.h>21#include <linux/hw_random.h>22#include <linux/bitops.h>23#include <linux/interrupt.h>24#include <linux/irqreturn.h>25 26#define SP_MAX_NAME_LEN 3227 28#define CACHE_NONE 0x0029#define CACHE_WB_NO_ALLOC 0xb730 31#define PLATFORM_FEATURE_DBC 0x132#define PLATFORM_FEATURE_HSTI 0x233 34#define PSP_FEATURE(psp, feat) (psp->vdata && psp->vdata->platform_features & PLATFORM_FEATURE_##feat)35 36/* Structure to hold CCP device data */37struct ccp_device;38struct ccp_vdata {39 const unsigned int version;40 const unsigned int dma_chan_attr;41 void (*setup)(struct ccp_device *);42 const struct ccp_actions *perform;43 const unsigned int offset;44 const unsigned int rsamax;45};46 47struct sev_vdata {48 const unsigned int cmdresp_reg;49 const unsigned int cmdbuff_addr_lo_reg;50 const unsigned int cmdbuff_addr_hi_reg;51};52 53struct tee_vdata {54 const unsigned int cmdresp_reg;55 const unsigned int cmdbuff_addr_lo_reg;56 const unsigned int cmdbuff_addr_hi_reg;57 const unsigned int ring_wptr_reg;58 const unsigned int ring_rptr_reg;59 const unsigned int info_reg;60};61 62struct platform_access_vdata {63 const unsigned int cmdresp_reg;64 const unsigned int cmdbuff_addr_lo_reg;65 const unsigned int cmdbuff_addr_hi_reg;66 const unsigned int doorbell_button_reg;67 const unsigned int doorbell_cmd_reg;68 69};70 71struct psp_vdata {72 const struct sev_vdata *sev;73 const struct tee_vdata *tee;74 const struct platform_access_vdata *platform_access;75 const unsigned int cmdresp_reg;76 const unsigned int cmdbuff_addr_lo_reg;77 const unsigned int cmdbuff_addr_hi_reg;78 const unsigned int feature_reg;79 const unsigned int inten_reg;80 const unsigned int intsts_reg;81 const unsigned int bootloader_info_reg;82 const unsigned int platform_features;83};84 85/* Structure to hold SP device data */86struct sp_dev_vdata {87 const unsigned int bar;88 89 const struct ccp_vdata *ccp_vdata;90 const struct psp_vdata *psp_vdata;91};92 93struct sp_device {94 struct list_head entry;95 96 struct device *dev;97 98 struct sp_dev_vdata *dev_vdata;99 unsigned int ord;100 char name[SP_MAX_NAME_LEN];101 102 /* Bus specific device information */103 void *dev_specific;104 105 /* I/O area used for device communication. */106 void __iomem *io_map;107 108 /* DMA caching attribute support */109 unsigned int axcache;110 111 /* get and set master device */112 struct sp_device*(*get_psp_master_device)(void);113 void (*set_psp_master_device)(struct sp_device *);114 void (*clear_psp_master_device)(struct sp_device *);115 116 bool irq_registered;117 bool use_tasklet;118 119 unsigned int ccp_irq;120 irq_handler_t ccp_irq_handler;121 void *ccp_irq_data;122 123 unsigned int psp_irq;124 irq_handler_t psp_irq_handler;125 void *psp_irq_data;126 127 void *ccp_data;128 void *psp_data;129};130 131int sp_pci_init(void);132void sp_pci_exit(void);133 134int sp_platform_init(void);135void sp_platform_exit(void);136 137struct sp_device *sp_alloc_struct(struct device *dev);138 139int sp_init(struct sp_device *sp);140void sp_destroy(struct sp_device *sp);141 142int sp_suspend(struct sp_device *sp);143int sp_resume(struct sp_device *sp);144int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,145 const char *name, void *data);146void sp_free_ccp_irq(struct sp_device *sp, void *data);147int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,148 const char *name, void *data);149void sp_free_psp_irq(struct sp_device *sp, void *data);150struct sp_device *sp_get_psp_master_device(void);151 152#ifdef CONFIG_CRYPTO_DEV_SP_CCP153 154int ccp_dev_init(struct sp_device *sp);155void ccp_dev_destroy(struct sp_device *sp);156 157void ccp_dev_suspend(struct sp_device *sp);158void ccp_dev_resume(struct sp_device *sp);159 160#else /* !CONFIG_CRYPTO_DEV_SP_CCP */161 162static inline int ccp_dev_init(struct sp_device *sp)163{164 return 0;165}166static inline void ccp_dev_destroy(struct sp_device *sp) { }167static inline void ccp_dev_suspend(struct sp_device *sp) { }168static inline void ccp_dev_resume(struct sp_device *sp) { }169#endif /* CONFIG_CRYPTO_DEV_SP_CCP */170 171#ifdef CONFIG_CRYPTO_DEV_SP_PSP172 173int psp_dev_init(struct sp_device *sp);174void psp_pci_init(void);175void psp_dev_destroy(struct sp_device *sp);176void psp_pci_exit(void);177 178#else /* !CONFIG_CRYPTO_DEV_SP_PSP */179 180static inline int psp_dev_init(struct sp_device *sp) { return 0; }181static inline void psp_pci_init(void) { }182static inline void psp_dev_destroy(struct sp_device *sp) { }183static inline void psp_pci_exit(void) { }184 185#endif /* CONFIG_CRYPTO_DEV_SP_PSP */186 187#endif188