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/pci.h> 17 #include <linux/spinlock.h> 18 #include <linux/mutex.h> 19 #include <linux/list.h> 20 #include <linux/wait.h> 21 #include <linux/dmapool.h> 22 #include <linux/hw_random.h> 23 #include <linux/bitops.h> 24 #include <linux/interrupt.h> 25 #include <linux/irqreturn.h> 26 27 #define SP_MAX_NAME_LEN 32 28 29 #define CACHE_NONE 0x00 30 #define CACHE_WB_NO_ALLOC 0xb7 31 32 /* Structure to hold CCP device data */ 33 struct ccp_device; 34 struct ccp_vdata { 35 const unsigned int version; 36 const unsigned int dma_chan_attr; 37 void (*setup)(struct ccp_device *); 38 const struct ccp_actions *perform; 39 const unsigned int offset; 40 const unsigned int rsamax; 41 }; 42 43 struct psp_vdata { 44 const unsigned int cmdresp_reg; 45 const unsigned int cmdbuff_addr_lo_reg; 46 const unsigned int cmdbuff_addr_hi_reg; 47 const unsigned int feature_reg; 48 const unsigned int inten_reg; 49 const unsigned int intsts_reg; 50 }; 51 52 /* Structure to hold SP device data */ 53 struct sp_dev_vdata { 54 const unsigned int bar; 55 56 const struct ccp_vdata *ccp_vdata; 57 const struct psp_vdata *psp_vdata; 58 }; 59 60 struct sp_device { 61 struct list_head entry; 62 63 struct device *dev; 64 65 struct sp_dev_vdata *dev_vdata; 66 unsigned int ord; 67 char name[SP_MAX_NAME_LEN]; 68 69 /* Bus specific device information */ 70 void *dev_specific; 71 72 /* I/O area used for device communication. */ 73 void __iomem *io_map; 74 75 /* DMA caching attribute support */ 76 unsigned int axcache; 77 78 /* get and set master device */ 79 struct sp_device*(*get_psp_master_device)(void); 80 void (*set_psp_master_device)(struct sp_device *); 81 82 bool irq_registered; 83 bool use_tasklet; 84 85 unsigned int ccp_irq; 86 irq_handler_t ccp_irq_handler; 87 void *ccp_irq_data; 88 89 unsigned int psp_irq; 90 irq_handler_t psp_irq_handler; 91 void *psp_irq_data; 92 93 void *ccp_data; 94 void *psp_data; 95 }; 96 97 int sp_pci_init(void); 98 void sp_pci_exit(void); 99 100 int sp_platform_init(void); 101 void sp_platform_exit(void); 102 103 struct sp_device *sp_alloc_struct(struct device *dev); 104 105 int sp_init(struct sp_device *sp); 106 void sp_destroy(struct sp_device *sp); 107 struct sp_device *sp_get_master(void); 108 109 int sp_suspend(struct sp_device *sp, pm_message_t state); 110 int sp_resume(struct sp_device *sp); 111 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler, 112 const char *name, void *data); 113 void sp_free_ccp_irq(struct sp_device *sp, void *data); 114 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler, 115 const char *name, void *data); 116 void sp_free_psp_irq(struct sp_device *sp, void *data); 117 struct sp_device *sp_get_psp_master_device(void); 118 119 #ifdef CONFIG_CRYPTO_DEV_SP_CCP 120 121 int ccp_dev_init(struct sp_device *sp); 122 void ccp_dev_destroy(struct sp_device *sp); 123 124 int ccp_dev_suspend(struct sp_device *sp, pm_message_t state); 125 int ccp_dev_resume(struct sp_device *sp); 126 127 #else /* !CONFIG_CRYPTO_DEV_SP_CCP */ 128 129 static inline int ccp_dev_init(struct sp_device *sp) 130 { 131 return 0; 132 } 133 static inline void ccp_dev_destroy(struct sp_device *sp) { } 134 135 static inline int ccp_dev_suspend(struct sp_device *sp, pm_message_t state) 136 { 137 return 0; 138 } 139 static inline int ccp_dev_resume(struct sp_device *sp) 140 { 141 return 0; 142 } 143 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */ 144 145 #ifdef CONFIG_CRYPTO_DEV_SP_PSP 146 147 int psp_dev_init(struct sp_device *sp); 148 void psp_pci_init(void); 149 void psp_dev_destroy(struct sp_device *sp); 150 void psp_pci_exit(void); 151 152 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */ 153 154 static inline int psp_dev_init(struct sp_device *sp) { return 0; } 155 static inline void psp_pci_init(void) { } 156 static inline void psp_dev_destroy(struct sp_device *sp) { } 157 static inline void psp_pci_exit(void) { } 158 159 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */ 160 161 #endif 162