sp-dev.h (4145B)
1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * AMD Secure Processor driver 4 * 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 32 27 28#define CACHE_NONE 0x00 29#define CACHE_WB_NO_ALLOC 0xb7 30 31/* Structure to hold CCP device data */ 32struct ccp_device; 33struct ccp_vdata { 34 const unsigned int version; 35 const unsigned int dma_chan_attr; 36 void (*setup)(struct ccp_device *); 37 const struct ccp_actions *perform; 38 const unsigned int offset; 39 const unsigned int rsamax; 40}; 41 42struct sev_vdata { 43 const unsigned int cmdresp_reg; 44 const unsigned int cmdbuff_addr_lo_reg; 45 const unsigned int cmdbuff_addr_hi_reg; 46}; 47 48struct tee_vdata { 49 const unsigned int cmdresp_reg; 50 const unsigned int cmdbuff_addr_lo_reg; 51 const unsigned int cmdbuff_addr_hi_reg; 52 const unsigned int ring_wptr_reg; 53 const unsigned int ring_rptr_reg; 54}; 55 56struct psp_vdata { 57 const struct sev_vdata *sev; 58 const struct tee_vdata *tee; 59 const unsigned int feature_reg; 60 const unsigned int inten_reg; 61 const unsigned int intsts_reg; 62}; 63 64/* Structure to hold SP device data */ 65struct sp_dev_vdata { 66 const unsigned int bar; 67 68 const struct ccp_vdata *ccp_vdata; 69 const struct psp_vdata *psp_vdata; 70}; 71 72struct sp_device { 73 struct list_head entry; 74 75 struct device *dev; 76 77 struct sp_dev_vdata *dev_vdata; 78 unsigned int ord; 79 char name[SP_MAX_NAME_LEN]; 80 81 /* Bus specific device information */ 82 void *dev_specific; 83 84 /* I/O area used for device communication. */ 85 void __iomem *io_map; 86 87 /* DMA caching attribute support */ 88 unsigned int axcache; 89 90 /* get and set master device */ 91 struct sp_device*(*get_psp_master_device)(void); 92 void (*set_psp_master_device)(struct sp_device *); 93 void (*clear_psp_master_device)(struct sp_device *); 94 95 bool irq_registered; 96 bool use_tasklet; 97 98 unsigned int ccp_irq; 99 irq_handler_t ccp_irq_handler; 100 void *ccp_irq_data; 101 102 unsigned int psp_irq; 103 irq_handler_t psp_irq_handler; 104 void *psp_irq_data; 105 106 void *ccp_data; 107 void *psp_data; 108}; 109 110int sp_pci_init(void); 111void sp_pci_exit(void); 112 113int sp_platform_init(void); 114void sp_platform_exit(void); 115 116struct sp_device *sp_alloc_struct(struct device *dev); 117 118int sp_init(struct sp_device *sp); 119void sp_destroy(struct sp_device *sp); 120struct sp_device *sp_get_master(void); 121 122int sp_suspend(struct sp_device *sp); 123int sp_resume(struct sp_device *sp); 124int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler, 125 const char *name, void *data); 126void sp_free_ccp_irq(struct sp_device *sp, void *data); 127int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler, 128 const char *name, void *data); 129void sp_free_psp_irq(struct sp_device *sp, void *data); 130struct sp_device *sp_get_psp_master_device(void); 131 132#ifdef CONFIG_CRYPTO_DEV_SP_CCP 133 134int ccp_dev_init(struct sp_device *sp); 135void ccp_dev_destroy(struct sp_device *sp); 136 137void ccp_dev_suspend(struct sp_device *sp); 138void ccp_dev_resume(struct sp_device *sp); 139 140#else /* !CONFIG_CRYPTO_DEV_SP_CCP */ 141 142static inline int ccp_dev_init(struct sp_device *sp) 143{ 144 return 0; 145} 146static inline void ccp_dev_destroy(struct sp_device *sp) { } 147static inline void ccp_dev_suspend(struct sp_device *sp) { } 148static inline void ccp_dev_resume(struct sp_device *sp) { } 149#endif /* CONFIG_CRYPTO_DEV_SP_CCP */ 150 151#ifdef CONFIG_CRYPTO_DEV_SP_PSP 152 153int psp_dev_init(struct sp_device *sp); 154void psp_pci_init(void); 155void psp_dev_destroy(struct sp_device *sp); 156void psp_pci_exit(void); 157 158#else /* !CONFIG_CRYPTO_DEV_SP_PSP */ 159 160static inline int psp_dev_init(struct sp_device *sp) { return 0; } 161static inline void psp_pci_init(void) { } 162static inline void psp_dev_destroy(struct sp_device *sp) { } 163static inline void psp_pci_exit(void) { } 164 165#endif /* CONFIG_CRYPTO_DEV_SP_PSP */ 166 167#endif