drivers/crypto/ccp/sp-dev.h

   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