1 /* 2 * AMD Secure Processor driver 3 * 4 * Copyright (C) 2017 Advanced Micro Devices, Inc. 5 * 6 * Author: Tom Lendacky <thomas.lendacky@amd.com> 7 * Author: Gary R Hook <gary.hook@amd.com> 8 * Author: Brijesh Singh <brijesh.singh@amd.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 #ifndef __SP_DEV_H__ 16 #define __SP_DEV_H__ 17 18 #include <linux/device.h> 19 #include <linux/pci.h> 20 #include <linux/spinlock.h> 21 #include <linux/mutex.h> 22 #include <linux/list.h> 23 #include <linux/wait.h> 24 #include <linux/dmapool.h> 25 #include <linux/hw_random.h> 26 #include <linux/bitops.h> 27 #include <linux/interrupt.h> 28 #include <linux/irqreturn.h> 29 30 #define SP_MAX_NAME_LEN 32 31 32 #define CACHE_NONE 0x00 33 #define CACHE_WB_NO_ALLOC 0xb7 34 35 /* Structure to hold CCP device data */ 36 struct ccp_device; 37 struct ccp_vdata { 38 const unsigned int version; 39 const unsigned int dma_chan_attr; 40 void (*setup)(struct ccp_device *); 41 const struct ccp_actions *perform; 42 const unsigned int offset; 43 const unsigned int rsamax; 44 }; 45 46 struct psp_vdata { 47 const unsigned int offset; 48 }; 49 50 /* Structure to hold SP device data */ 51 struct sp_dev_vdata { 52 const unsigned int bar; 53 54 const struct ccp_vdata *ccp_vdata; 55 const struct psp_vdata *psp_vdata; 56 }; 57 58 struct sp_device { 59 struct list_head entry; 60 61 struct device *dev; 62 63 struct sp_dev_vdata *dev_vdata; 64 unsigned int ord; 65 char name[SP_MAX_NAME_LEN]; 66 67 /* Bus specific device information */ 68 void *dev_specific; 69 70 /* I/O area used for device communication. */ 71 void __iomem *io_map; 72 73 /* DMA caching attribute support */ 74 unsigned int axcache; 75 76 /* get and set master device */ 77 struct sp_device*(*get_psp_master_device)(void); 78 void (*set_psp_master_device)(struct sp_device *); 79 80 bool irq_registered; 81 bool use_tasklet; 82 83 unsigned int ccp_irq; 84 irq_handler_t ccp_irq_handler; 85 void *ccp_irq_data; 86 87 unsigned int psp_irq; 88 irq_handler_t psp_irq_handler; 89 void *psp_irq_data; 90 91 void *ccp_data; 92 void *psp_data; 93 }; 94 95 int sp_pci_init(void); 96 void sp_pci_exit(void); 97 98 int sp_platform_init(void); 99 void sp_platform_exit(void); 100 101 struct sp_device *sp_alloc_struct(struct device *dev); 102 103 int sp_init(struct sp_device *sp); 104 void sp_destroy(struct sp_device *sp); 105 struct sp_device *sp_get_master(void); 106 107 int sp_suspend(struct sp_device *sp, pm_message_t state); 108 int sp_resume(struct sp_device *sp); 109 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler, 110 const char *name, void *data); 111 void sp_free_ccp_irq(struct sp_device *sp, void *data); 112 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler, 113 const char *name, void *data); 114 void sp_free_psp_irq(struct sp_device *sp, void *data); 115 struct sp_device *sp_get_psp_master_device(void); 116 117 #ifdef CONFIG_CRYPTO_DEV_SP_CCP 118 119 int ccp_dev_init(struct sp_device *sp); 120 void ccp_dev_destroy(struct sp_device *sp); 121 122 int ccp_dev_suspend(struct sp_device *sp, pm_message_t state); 123 int ccp_dev_resume(struct sp_device *sp); 124 125 #else /* !CONFIG_CRYPTO_DEV_SP_CCP */ 126 127 static inline int ccp_dev_init(struct sp_device *sp) 128 { 129 return 0; 130 } 131 static inline void ccp_dev_destroy(struct sp_device *sp) { } 132 133 static inline int ccp_dev_suspend(struct sp_device *sp, pm_message_t state) 134 { 135 return 0; 136 } 137 static inline int ccp_dev_resume(struct sp_device *sp) 138 { 139 return 0; 140 } 141 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */ 142 143 #ifdef CONFIG_CRYPTO_DEV_SP_PSP 144 145 int psp_dev_init(struct sp_device *sp); 146 void psp_pci_init(void); 147 void psp_dev_destroy(struct sp_device *sp); 148 void psp_pci_exit(void); 149 150 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */ 151 152 static inline int psp_dev_init(struct sp_device *sp) { return 0; } 153 static inline void psp_pci_init(void) { } 154 static inline void psp_dev_destroy(struct sp_device *sp) { } 155 static inline void psp_pci_exit(void) { } 156 157 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */ 158 159 #endif 160