/* SPDX-License-Identifier: GPL-2.0-only *//* * AMD Secure Processor driver * * Copyright (C) 2017-2019 Advanced Micro Devices, Inc. * * Author: Tom Lendacky <thomas.lendacky@amd.com> * Author: Gary R Hook <gary.hook@amd.com> * Author: Brijesh Singh <brijesh.singh@amd.com> */ #ifndef __SP_DEV_H__#define __SP_DEV_H__ #include <linux/device.h>#include <linux/spinlock.h>#include <linux/mutex.h>#include <linux/list.h>#include <linux/wait.h>#include <linux/dmapool.h>#include <linux/hw_random.h>#include <linux/bitops.h>#include <linux/interrupt.h>#include <linux/irqreturn.h> #define SP_MAX_NAME_LEN		32 #define CACHE_NONE			0x00#define CACHE_WB_NO_ALLOC		0xb7 #define PLATFORM_FEATURE_DBC		0x1#define PLATFORM_FEATURE_HSTI		0x2 #define PSP_FEATURE(psp, feat)	(psp->vdata && psp->vdata->platform_features & PLATFORM_FEATURE_##feat) /* Structure to hold CCP device data */struct ccp_device;struct ccp_vdata {	const unsigned int version;	const unsigned int dma_chan_attr;	void (*setup)(struct ccp_device *);	const struct ccp_actions *perform;	const unsigned int offset;	const unsigned int rsamax;}; struct sev_vdata {	const unsigned int cmdresp_reg;	const unsigned int cmdbuff_addr_lo_reg;	const unsigned int cmdbuff_addr_hi_reg;}; struct tee_vdata {	const unsigned int cmdresp_reg;	const unsigned int cmdbuff_addr_lo_reg;	const unsigned int cmdbuff_addr_hi_reg;	const unsigned int ring_wptr_reg;	const unsigned int ring_rptr_reg;	const unsigned int info_reg;}; struct platform_access_vdata {	const unsigned int cmdresp_reg;	const unsigned int cmdbuff_addr_lo_reg;	const unsigned int cmdbuff_addr_hi_reg;	const unsigned int doorbell_button_reg;	const unsigned int doorbell_cmd_reg; }; struct psp_vdata {	const struct sev_vdata *sev;	const struct tee_vdata *tee;	const struct platform_access_vdata *platform_access;	const unsigned int cmdresp_reg;	const unsigned int cmdbuff_addr_lo_reg;	const unsigned int cmdbuff_addr_hi_reg;	const unsigned int feature_reg;	const unsigned int inten_reg;	const unsigned int intsts_reg;	const unsigned int bootloader_info_reg;	const unsigned int platform_features;}; /* Structure to hold SP device data */struct sp_dev_vdata {	const unsigned int bar; 	const struct ccp_vdata *ccp_vdata;	const struct psp_vdata *psp_vdata;}; struct sp_device {	struct list_head entry; 	struct device *dev; 	const struct sp_dev_vdata *dev_vdata;	unsigned int ord;	char name[SP_MAX_NAME_LEN]; 	/* Bus specific device information */	void *dev_specific; 	/* I/O area used for device communication. */	void __iomem *io_map; 	/* DMA caching attribute support */	unsigned int axcache; 	/* get and set master device */	struct sp_device*(*get_psp_master_device)(void);	void (*set_psp_master_device)(struct sp_device *);	void (*clear_psp_master_device)(struct sp_device *); 	bool irq_registered;	bool use_tasklet; 	unsigned int ccp_irq;	irq_handler_t ccp_irq_handler;	void *ccp_irq_data; 	unsigned int psp_irq;	irq_handler_t psp_irq_handler;	void *psp_irq_data; 	void *ccp_data;	void *psp_data;}; int sp_pci_init(void);void sp_pci_exit(void); int sp_platform_init(void);void sp_platform_exit(void); struct sp_device *sp_alloc_struct(struct device *dev); int sp_init(struct sp_device *sp);void sp_destroy(struct sp_device *sp); int sp_suspend(struct sp_device *sp);int sp_resume(struct sp_device *sp);int sp_restore(struct sp_device *sp);int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,		       const char *name, void *data);void sp_free_ccp_irq(struct sp_device *sp, void *data);int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,		       const char *name, void *data);void sp_free_psp_irq(struct sp_device *sp, void *data);struct sp_device *sp_get_psp_master_device(void); #ifdef CONFIG_CRYPTO_DEV_SP_CCP int ccp_dev_init(struct sp_device *sp);void ccp_dev_destroy(struct sp_device *sp); void ccp_dev_suspend(struct sp_device *sp);void ccp_dev_resume(struct sp_device *sp); #else	/* !CONFIG_CRYPTO_DEV_SP_CCP */ static inline int ccp_dev_init(struct sp_device *sp){	return 0;}static inline void ccp_dev_destroy(struct sp_device *sp) { }static inline void ccp_dev_suspend(struct sp_device *sp) { }static inline void ccp_dev_resume(struct sp_device *sp) { }#endif	/* CONFIG_CRYPTO_DEV_SP_CCP */ #ifdef CONFIG_CRYPTO_DEV_SP_PSP int psp_dev_init(struct sp_device *sp);void psp_pci_init(void);void psp_dev_destroy(struct sp_device *sp);void psp_pci_exit(void);int psp_restore(struct sp_device *sp); #else /* !CONFIG_CRYPTO_DEV_SP_PSP */ static inline int psp_dev_init(struct sp_device *sp) { return 0; }static inline void psp_pci_init(void) { }static inline void psp_dev_destroy(struct sp_device *sp) { }static inline void psp_pci_exit(void) { }static inline int psp_restore(struct sp_device *sp) { return 0; } #endif /* CONFIG_CRYPTO_DEV_SP_PSP */ #endif