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 */ 32 struct ccp_device; 33 struct 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 42 struct 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 48 struct 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 56 struct 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 */ 65 struct 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 72 struct 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 }; 109 110 int sp_pci_init(void); 111 void sp_pci_exit(void); 112 113 int sp_platform_init(void); 114 void sp_platform_exit(void); 115 116 struct sp_device *sp_alloc_struct(struct device *dev); 117 118 int sp_init(struct sp_device *sp); 119 void sp_destroy(struct sp_device *sp); 120 struct sp_device *sp_get_master(void); 121 122 int sp_suspend(struct sp_device *sp); 123 int sp_resume(struct sp_device *sp); 124 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler, 125 const char *name, void *data); 126 void sp_free_ccp_irq(struct sp_device *sp, void *data); 127 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler, 128 const char *name, void *data); 129 void sp_free_psp_irq(struct sp_device *sp, void *data); 130 struct sp_device *sp_get_psp_master_device(void); 131 132 #ifdef CONFIG_CRYPTO_DEV_SP_CCP 133 134 int ccp_dev_init(struct sp_device *sp); 135 void ccp_dev_destroy(struct sp_device *sp); 136 137 int ccp_dev_suspend(struct sp_device *sp); 138 int ccp_dev_resume(struct sp_device *sp); 139 140 #else /* !CONFIG_CRYPTO_DEV_SP_CCP */ 141 142 static inline int ccp_dev_init(struct sp_device *sp) 143 { 144 return 0; 145 } 146 static inline void ccp_dev_destroy(struct sp_device *sp) { } 147 148 static inline int ccp_dev_suspend(struct sp_device *sp) 149 { 150 return 0; 151 } 152 static inline int ccp_dev_resume(struct sp_device *sp) 153 { 154 return 0; 155 } 156 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */ 157 158 #ifdef CONFIG_CRYPTO_DEV_SP_PSP 159 160 int psp_dev_init(struct sp_device *sp); 161 void psp_pci_init(void); 162 void psp_dev_destroy(struct sp_device *sp); 163 void psp_pci_exit(void); 164 165 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */ 166 167 static inline int psp_dev_init(struct sp_device *sp) { return 0; } 168 static inline void psp_pci_init(void) { } 169 static inline void psp_dev_destroy(struct sp_device *sp) { } 170 static inline void psp_pci_exit(void) { } 171 172 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */ 173 174 #endif 175