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 platform_access_vdata { 57 const unsigned int cmdresp_reg; 58 const unsigned int cmdbuff_addr_lo_reg; 59 const unsigned int cmdbuff_addr_hi_reg; 60 const unsigned int doorbell_button_reg; 61 const unsigned int doorbell_cmd_reg; 62 63 }; 64 65 struct psp_vdata { 66 const struct sev_vdata *sev; 67 const struct tee_vdata *tee; 68 const struct platform_access_vdata *platform_access; 69 const unsigned int feature_reg; 70 const unsigned int inten_reg; 71 const unsigned int intsts_reg; 72 }; 73 74 /* Structure to hold SP device data */ 75 struct sp_dev_vdata { 76 const unsigned int bar; 77 78 const struct ccp_vdata *ccp_vdata; 79 const struct psp_vdata *psp_vdata; 80 }; 81 82 struct sp_device { 83 struct list_head entry; 84 85 struct device *dev; 86 87 struct sp_dev_vdata *dev_vdata; 88 unsigned int ord; 89 char name[SP_MAX_NAME_LEN]; 90 91 /* Bus specific device information */ 92 void *dev_specific; 93 94 /* I/O area used for device communication. */ 95 void __iomem *io_map; 96 97 /* DMA caching attribute support */ 98 unsigned int axcache; 99 100 /* get and set master device */ 101 struct sp_device*(*get_psp_master_device)(void); 102 void (*set_psp_master_device)(struct sp_device *); 103 void (*clear_psp_master_device)(struct sp_device *); 104 105 bool irq_registered; 106 bool use_tasklet; 107 108 unsigned int ccp_irq; 109 irq_handler_t ccp_irq_handler; 110 void *ccp_irq_data; 111 112 unsigned int psp_irq; 113 irq_handler_t psp_irq_handler; 114 void *psp_irq_data; 115 116 void *ccp_data; 117 void *psp_data; 118 }; 119 120 int sp_pci_init(void); 121 void sp_pci_exit(void); 122 123 int sp_platform_init(void); 124 void sp_platform_exit(void); 125 126 struct sp_device *sp_alloc_struct(struct device *dev); 127 128 int sp_init(struct sp_device *sp); 129 void sp_destroy(struct sp_device *sp); 130 struct sp_device *sp_get_master(void); 131 132 int sp_suspend(struct sp_device *sp); 133 int sp_resume(struct sp_device *sp); 134 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler, 135 const char *name, void *data); 136 void sp_free_ccp_irq(struct sp_device *sp, void *data); 137 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler, 138 const char *name, void *data); 139 void sp_free_psp_irq(struct sp_device *sp, void *data); 140 struct sp_device *sp_get_psp_master_device(void); 141 142 #ifdef CONFIG_CRYPTO_DEV_SP_CCP 143 144 int ccp_dev_init(struct sp_device *sp); 145 void ccp_dev_destroy(struct sp_device *sp); 146 147 void ccp_dev_suspend(struct sp_device *sp); 148 void ccp_dev_resume(struct sp_device *sp); 149 150 #else /* !CONFIG_CRYPTO_DEV_SP_CCP */ 151 152 static inline int ccp_dev_init(struct sp_device *sp) 153 { 154 return 0; 155 } 156 static inline void ccp_dev_destroy(struct sp_device *sp) { } 157 static inline void ccp_dev_suspend(struct sp_device *sp) { } 158 static inline void ccp_dev_resume(struct sp_device *sp) { } 159 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */ 160 161 #ifdef CONFIG_CRYPTO_DEV_SP_PSP 162 163 int psp_dev_init(struct sp_device *sp); 164 void psp_pci_init(void); 165 void psp_dev_destroy(struct sp_device *sp); 166 void psp_pci_exit(void); 167 168 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */ 169 170 static inline int psp_dev_init(struct sp_device *sp) { return 0; } 171 static inline void psp_pci_init(void) { } 172 static inline void psp_dev_destroy(struct sp_device *sp) { } 173 static inline void psp_pci_exit(void) { } 174 175 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */ 176 177 #endif 178