drivers/crypto/ccp/sp-dev.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * AMD Secure Processor driver
   4  *
   5  * Copyright (C) 2017-2019 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 sev_vdata {
  43         const unsigned int cmdresp_reg;
  44         const unsigned int cmdbuff_addr_lo_reg;
  45         const unsigned int cmdbuff_addr_hi_reg;
  46 };
  47
  48 struct tee_vdata {
  49         const unsigned int cmdresp_reg;
  50         const unsigned int cmdbuff_addr_lo_reg;
  51         const unsigned int cmdbuff_addr_hi_reg;
  52         const unsigned int ring_wptr_reg;
  53         const unsigned int ring_rptr_reg;
  54 };
  55
  56 struct psp_vdata {
  57         const struct sev_vdata *sev;
  58         const struct tee_vdata *tee;
  59         const unsigned int feature_reg;
  60         const unsigned int inten_reg;
  61         const unsigned int intsts_reg;
  62 };
  63
  64 /* Structure to hold SP device data */
  65 struct sp_dev_vdata {
  66         const unsigned int bar;
  67
  68         const struct ccp_vdata *ccp_vdata;
  69         const struct psp_vdata *psp_vdata;
  70 };
  71
  72 struct sp_device {
  73         struct list_head entry;
  74
  75         struct device *dev;
  76
  77         struct sp_dev_vdata *dev_vdata;
  78         unsigned int ord;
  79         char name[SP_MAX_NAME_LEN];
  80
  81         /* Bus specific device information */
  82         void *dev_specific;
  83
  84         /* I/O area used for device communication. */
  85         void __iomem *io_map;
  86
  87         /* DMA caching attribute support */
  88         unsigned int axcache;
  89
  90         /* get and set master device */
  91         struct sp_device*(*get_psp_master_device)(void);
  92         void (*set_psp_master_device)(struct sp_device *);
  93
  94         bool irq_registered;
  95         bool use_tasklet;
  96
  97         unsigned int ccp_irq;
  98         irq_handler_t ccp_irq_handler;
  99         void *ccp_irq_data;
 100
 101         unsigned int psp_irq;
 102         irq_handler_t psp_irq_handler;
 103         void *psp_irq_data;
 104
 105         void *ccp_data;
 106         void *psp_data;
 107 };
 108
 109 int sp_pci_init(void);
 110 void sp_pci_exit(void);
 111
 112 int sp_platform_init(void);
 113 void sp_platform_exit(void);
 114
 115 struct sp_device *sp_alloc_struct(struct device *dev);
 116
 117 int sp_init(struct sp_device *sp);
 118 void sp_destroy(struct sp_device *sp);
 119 struct sp_device *sp_get_master(void);
 120
 121 int sp_suspend(struct sp_device *sp, pm_message_t state);
 122 int sp_resume(struct sp_device *sp);
 123 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
 124                        const char *name, void *data);
 125 void sp_free_ccp_irq(struct sp_device *sp, void *data);
 126 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
 127                        const char *name, void *data);
 128 void sp_free_psp_irq(struct sp_device *sp, void *data);
 129 struct sp_device *sp_get_psp_master_device(void);
 130
 131 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
 132
 133 int ccp_dev_init(struct sp_device *sp);
 134 void ccp_dev_destroy(struct sp_device *sp);
 135
 136 int ccp_dev_suspend(struct sp_device *sp, pm_message_t state);
 137 int ccp_dev_resume(struct sp_device *sp);
 138
 139 #else   /* !CONFIG_CRYPTO_DEV_SP_CCP */
 140
 141 static inline int ccp_dev_init(struct sp_device *sp)
 142 {
 143         return 0;
 144 }
 145 static inline void ccp_dev_destroy(struct sp_device *sp) { }
 146
 147 static inline int ccp_dev_suspend(struct sp_device *sp, pm_message_t state)
 148 {
 149         return 0;
 150 }
 151 static inline int ccp_dev_resume(struct sp_device *sp)
 152 {
 153         return 0;
 154 }
 155 #endif  /* CONFIG_CRYPTO_DEV_SP_CCP */
 156
 157 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
 158
 159 int psp_dev_init(struct sp_device *sp);
 160 void psp_pci_init(void);
 161 void psp_dev_destroy(struct sp_device *sp);
 162 void psp_pci_exit(void);
 163
 164 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */
 165
 166 static inline int psp_dev_init(struct sp_device *sp) { return 0; }
 167 static inline void psp_pci_init(void) { }
 168 static inline void psp_dev_destroy(struct sp_device *sp) { }
 169 static inline void psp_pci_exit(void) { }
 170
 171 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */
 172
 173 #endif