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 /* Structure to hold SP device data */ 46 struct sp_dev_vdata { 47 const unsigned int bar; 48 49 const struct ccp_vdata *ccp_vdata; 50 void *psp_vdata; 51 }; 52 53 struct sp_device { 54 struct list_head entry; 55 56 struct device *dev; 57 58 struct sp_dev_vdata *dev_vdata; 59 unsigned int ord; 60 char name[SP_MAX_NAME_LEN]; 61 62 /* Bus specific device information */ 63 void *dev_specific; 64 65 /* I/O area used for device communication. */ 66 void __iomem *io_map; 67 68 /* DMA caching attribute support */ 69 unsigned int axcache; 70 71 bool irq_registered; 72 bool use_tasklet; 73 74 unsigned int ccp_irq; 75 irq_handler_t ccp_irq_handler; 76 void *ccp_irq_data; 77 78 unsigned int psp_irq; 79 irq_handler_t psp_irq_handler; 80 void *psp_irq_data; 81 82 void *ccp_data; 83 void *psp_data; 84 }; 85 86 int sp_pci_init(void); 87 void sp_pci_exit(void); 88 89 int sp_platform_init(void); 90 void sp_platform_exit(void); 91 92 struct sp_device *sp_alloc_struct(struct device *dev); 93 94 int sp_init(struct sp_device *sp); 95 void sp_destroy(struct sp_device *sp); 96 struct sp_device *sp_get_master(void); 97 98 int sp_suspend(struct sp_device *sp, pm_message_t state); 99 int sp_resume(struct sp_device *sp); 100 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler, 101 const char *name, void *data); 102 void sp_free_ccp_irq(struct sp_device *sp, void *data); 103 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler, 104 const char *name, void *data); 105 void sp_free_psp_irq(struct sp_device *sp, void *data); 106 107 #ifdef CONFIG_CRYPTO_DEV_SP_CCP 108 109 int ccp_dev_init(struct sp_device *sp); 110 void ccp_dev_destroy(struct sp_device *sp); 111 112 int ccp_dev_suspend(struct sp_device *sp, pm_message_t state); 113 int ccp_dev_resume(struct sp_device *sp); 114 115 #else /* !CONFIG_CRYPTO_DEV_SP_CCP */ 116 117 static inline int ccp_dev_init(struct sp_device *sp) 118 { 119 return 0; 120 } 121 static inline void ccp_dev_destroy(struct sp_device *sp) { } 122 123 static inline int ccp_dev_suspend(struct sp_device *sp, pm_message_t state) 124 { 125 return 0; 126 } 127 static inline int ccp_dev_resume(struct sp_device *sp) 128 { 129 return 0; 130 } 131 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */ 132 133 #endif 134