1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * AMD Secure Processor driver 4 * 5 * Copyright (C) 2017-2018 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 psp_vdata { 43 const unsigned int cmdresp_reg; 44 const unsigned int cmdbuff_addr_lo_reg; 45 const unsigned int cmdbuff_addr_hi_reg; 46 const unsigned int feature_reg; 47 const unsigned int inten_reg; 48 const unsigned int intsts_reg; 49 }; 50 51 /* Structure to hold SP device data */ 52 struct sp_dev_vdata { 53 const unsigned int bar; 54 55 const struct ccp_vdata *ccp_vdata; 56 const struct psp_vdata *psp_vdata; 57 }; 58 59 struct sp_device { 60 struct list_head entry; 61 62 struct device *dev; 63 64 struct sp_dev_vdata *dev_vdata; 65 unsigned int ord; 66 char name[SP_MAX_NAME_LEN]; 67 68 /* Bus specific device information */ 69 void *dev_specific; 70 71 /* I/O area used for device communication. */ 72 void __iomem *io_map; 73 74 /* DMA caching attribute support */ 75 unsigned int axcache; 76 77 /* get and set master device */ 78 struct sp_device*(*get_psp_master_device)(void); 79 void (*set_psp_master_device)(struct sp_device *); 80 81 bool irq_registered; 82 bool use_tasklet; 83 84 unsigned int ccp_irq; 85 irq_handler_t ccp_irq_handler; 86 void *ccp_irq_data; 87 88 unsigned int psp_irq; 89 irq_handler_t psp_irq_handler; 90 void *psp_irq_data; 91 92 void *ccp_data; 93 void *psp_data; 94 }; 95 96 int sp_pci_init(void); 97 void sp_pci_exit(void); 98 99 int sp_platform_init(void); 100 void sp_platform_exit(void); 101 102 struct sp_device *sp_alloc_struct(struct device *dev); 103 104 int sp_init(struct sp_device *sp); 105 void sp_destroy(struct sp_device *sp); 106 struct sp_device *sp_get_master(void); 107 108 int sp_suspend(struct sp_device *sp, pm_message_t state); 109 int sp_resume(struct sp_device *sp); 110 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler, 111 const char *name, void *data); 112 void sp_free_ccp_irq(struct sp_device *sp, void *data); 113 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler, 114 const char *name, void *data); 115 void sp_free_psp_irq(struct sp_device *sp, void *data); 116 struct sp_device *sp_get_psp_master_device(void); 117 118 #ifdef CONFIG_CRYPTO_DEV_SP_CCP 119 120 int ccp_dev_init(struct sp_device *sp); 121 void ccp_dev_destroy(struct sp_device *sp); 122 123 int ccp_dev_suspend(struct sp_device *sp, pm_message_t state); 124 int ccp_dev_resume(struct sp_device *sp); 125 126 #else /* !CONFIG_CRYPTO_DEV_SP_CCP */ 127 128 static inline int ccp_dev_init(struct sp_device *sp) 129 { 130 return 0; 131 } 132 static inline void ccp_dev_destroy(struct sp_device *sp) { } 133 134 static inline int ccp_dev_suspend(struct sp_device *sp, pm_message_t state) 135 { 136 return 0; 137 } 138 static inline int ccp_dev_resume(struct sp_device *sp) 139 { 140 return 0; 141 } 142 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */ 143 144 #ifdef CONFIG_CRYPTO_DEV_SP_PSP 145 146 int psp_dev_init(struct sp_device *sp); 147 void psp_pci_init(void); 148 void psp_dev_destroy(struct sp_device *sp); 149 void psp_pci_exit(void); 150 151 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */ 152 153 static inline int psp_dev_init(struct sp_device *sp) { return 0; } 154 static inline void psp_pci_init(void) { } 155 static inline void psp_dev_destroy(struct sp_device *sp) { } 156 static inline void psp_pci_exit(void) { } 157 158 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */ 159 160 #endif 161