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 #define PLATFORM_FEATURE_DBC            0x1
  32 #define PLATFORM_FEATURE_HSTI           0x2
  33
  34 #define PSP_FEATURE(psp, feat)  (psp->vdata && psp->vdata->platform_features & PLATFORM_FEATURE_##feat)
  35
  36 /* Structure to hold CCP device data */
  37 struct ccp_device;
  38 struct ccp_vdata {
  39         const unsigned int version;
  40         const unsigned int dma_chan_attr;
  41         void (*setup)(struct ccp_device *);
  42         const struct ccp_actions *perform;
  43         const unsigned int offset;
  44         const unsigned int rsamax;
  45 };
  46
  47 struct sev_vdata {
  48         const unsigned int cmdresp_reg;
  49         const unsigned int cmdbuff_addr_lo_reg;
  50         const unsigned int cmdbuff_addr_hi_reg;
  51 };
  52
  53 struct tee_vdata {
  54         const unsigned int cmdresp_reg;
  55         const unsigned int cmdbuff_addr_lo_reg;
  56         const unsigned int cmdbuff_addr_hi_reg;
  57         const unsigned int ring_wptr_reg;
  58         const unsigned int ring_rptr_reg;
  59         const unsigned int info_reg;
  60 };
  61
  62 struct platform_access_vdata {
  63         const unsigned int cmdresp_reg;
  64         const unsigned int cmdbuff_addr_lo_reg;
  65         const unsigned int cmdbuff_addr_hi_reg;
  66         const unsigned int doorbell_button_reg;
  67         const unsigned int doorbell_cmd_reg;
  68
  69 };
  70
  71 struct psp_vdata {
  72         const struct sev_vdata *sev;
  73         const struct tee_vdata *tee;
  74         const struct platform_access_vdata *platform_access;
  75         const unsigned int cmdresp_reg;
  76         const unsigned int cmdbuff_addr_lo_reg;
  77         const unsigned int cmdbuff_addr_hi_reg;
  78         const unsigned int feature_reg;
  79         const unsigned int inten_reg;
  80         const unsigned int intsts_reg;
  81         const unsigned int bootloader_info_reg;
  82         const unsigned int platform_features;
  83 };
  84
  85 /* Structure to hold SP device data */
  86 struct sp_dev_vdata {
  87         const unsigned int bar;
  88
  89         const struct ccp_vdata *ccp_vdata;
  90         const struct psp_vdata *psp_vdata;
  91 };
  92
  93 struct sp_device {
  94         struct list_head entry;
  95
  96         struct device *dev;
  97
  98         struct sp_dev_vdata *dev_vdata;
  99         unsigned int ord;
 100         char name[SP_MAX_NAME_LEN];
 101
 102         /* Bus specific device information */
 103         void *dev_specific;
 104
 105         /* I/O area used for device communication. */
 106         void __iomem *io_map;
 107
 108         /* DMA caching attribute support */
 109         unsigned int axcache;
 110
 111         /* get and set master device */
 112         struct sp_device*(*get_psp_master_device)(void);
 113         void (*set_psp_master_device)(struct sp_device *);
 114         void (*clear_psp_master_device)(struct sp_device *);
 115
 116         bool irq_registered;
 117         bool use_tasklet;
 118
 119         unsigned int ccp_irq;
 120         irq_handler_t ccp_irq_handler;
 121         void *ccp_irq_data;
 122
 123         unsigned int psp_irq;
 124         irq_handler_t psp_irq_handler;
 125         void *psp_irq_data;
 126
 127         void *ccp_data;
 128         void *psp_data;
 129 };
 130
 131 int sp_pci_init(void);
 132 void sp_pci_exit(void);
 133
 134 int sp_platform_init(void);
 135 void sp_platform_exit(void);
 136
 137 struct sp_device *sp_alloc_struct(struct device *dev);
 138
 139 int sp_init(struct sp_device *sp);
 140 void sp_destroy(struct sp_device *sp);
 141
 142 int sp_suspend(struct sp_device *sp);
 143 int sp_resume(struct sp_device *sp);
 144 int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
 145                        const char *name, void *data);
 146 void sp_free_ccp_irq(struct sp_device *sp, void *data);
 147 int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
 148                        const char *name, void *data);
 149 void sp_free_psp_irq(struct sp_device *sp, void *data);
 150 struct sp_device *sp_get_psp_master_device(void);
 151
 152 #ifdef CONFIG_CRYPTO_DEV_SP_CCP
 153
 154 int ccp_dev_init(struct sp_device *sp);
 155 void ccp_dev_destroy(struct sp_device *sp);
 156
 157 void ccp_dev_suspend(struct sp_device *sp);
 158 void ccp_dev_resume(struct sp_device *sp);
 159
 160 #else   /* !CONFIG_CRYPTO_DEV_SP_CCP */
 161
 162 static inline int ccp_dev_init(struct sp_device *sp)
 163 {
 164         return 0;
 165 }
 166 static inline void ccp_dev_destroy(struct sp_device *sp) { }
 167 static inline void ccp_dev_suspend(struct sp_device *sp) { }
 168 static inline void ccp_dev_resume(struct sp_device *sp) { }
 169 #endif  /* CONFIG_CRYPTO_DEV_SP_CCP */
 170
 171 #ifdef CONFIG_CRYPTO_DEV_SP_PSP
 172
 173 int psp_dev_init(struct sp_device *sp);
 174 void psp_pci_init(void);
 175 void psp_dev_destroy(struct sp_device *sp);
 176 void psp_pci_exit(void);
 177
 178 #else /* !CONFIG_CRYPTO_DEV_SP_PSP */
 179
 180 static inline int psp_dev_init(struct sp_device *sp) { return 0; }
 181 static inline void psp_pci_init(void) { }
 182 static inline void psp_dev_destroy(struct sp_device *sp) { }
 183 static inline void psp_pci_exit(void) { }
 184
 185 #endif /* CONFIG_CRYPTO_DEV_SP_PSP */
 186
 187 #endif