drivers/crypto/caam/intern.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * CAAM/SEC 4.x driver backend
   4  * Private/internal definitions between modules
   5  *
   6  * Copyright 2008-2011 Freescale Semiconductor, Inc.
   7  *
   8  */
   9
  10 #ifndef INTERN_H
  11 #define INTERN_H
  12
  13 /* Currently comes from Kconfig param as a ^2 (driver-required) */
  14 #define JOBR_DEPTH (1 << CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE)
  15
  16 /* Kconfig params for interrupt coalescing if selected (else zero) */
  17 #ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_INTC
  18 #define JOBR_INTC JRCFG_ICEN
  19 #define JOBR_INTC_TIME_THLD CONFIG_CRYPTO_DEV_FSL_CAAM_INTC_TIME_THLD
  20 #define JOBR_INTC_COUNT_THLD CONFIG_CRYPTO_DEV_FSL_CAAM_INTC_COUNT_THLD
  21 #else
  22 #define JOBR_INTC 0
  23 #define JOBR_INTC_TIME_THLD 0
  24 #define JOBR_INTC_COUNT_THLD 0
  25 #endif
  26
  27 /*
  28  * Storage for tracking each in-process entry moving across a ring
  29  * Each entry on an output ring needs one of these
  30  */
  31 struct caam_jrentry_info {
  32         void (*callbk)(struct device *dev, u32 *desc, u32 status, void *arg);
  33         void *cbkarg;   /* Argument per ring entry */
  34         u32 *desc_addr_virt;    /* Stored virt addr for postprocessing */
  35         dma_addr_t desc_addr_dma;       /* Stored bus addr for done matching */
  36         u32 desc_size;  /* Stored size for postprocessing, header derived */
  37 };
  38
  39 /* Private sub-storage for a single JobR */
  40 struct caam_drv_private_jr {
  41         struct list_head        list_node;      /* Job Ring device list */
  42         struct device           *dev;
  43         int ridx;
  44         struct caam_job_ring __iomem *rregs;    /* JobR's register space */
  45         struct tasklet_struct irqtask;
  46         int irq;                        /* One per queue */
  47
  48         /* Number of scatterlist crypt transforms active on the JobR */
  49         atomic_t tfm_count ____cacheline_aligned;
  50
  51         /* Job ring info */
  52         int ringsize;   /* Size of rings (assume input = output) */
  53         struct caam_jrentry_info *entinfo;      /* Alloc'ed 1 per ring entry */
  54         spinlock_t inplock ____cacheline_aligned; /* Input ring index lock */
  55         int inp_ring_write_index;       /* Input index "tail" */
  56         int head;                       /* entinfo (s/w ring) head index */
  57         dma_addr_t *inpring;    /* Base of input ring, alloc DMA-safe */
  58         spinlock_t outlock ____cacheline_aligned; /* Output ring index lock */
  59         int out_ring_read_index;        /* Output index "tail" */
  60         int tail;                       /* entinfo (s/w ring) tail index */
  61         struct jr_outentry *outring;    /* Base of output ring, DMA-safe */
  62 };
  63
  64 /*
  65  * Driver-private storage for a single CAAM block instance
  66  */
  67 struct caam_drv_private {
  68 #ifdef CONFIG_CAAM_QI
  69         struct device *qidev;
  70 #endif
  71
  72         /* Physical-presence section */
  73         struct caam_ctrl __iomem *ctrl; /* controller region */
  74         struct caam_deco __iomem *deco; /* DECO/CCB views */
  75         struct caam_assurance __iomem *assure;
  76         struct caam_queue_if __iomem *qi; /* QI control region */
  77         struct caam_job_ring __iomem *jr[4];    /* JobR's register space */
  78
  79         /*
  80          * Detected geometry block. Filled in from device tree if powerpc,
  81          * or from register-based version detection code
  82          */
  83         u8 total_jobrs;         /* Total Job Rings in device */
  84         u8 qi_present;          /* Nonzero if QI present in device */
  85         int secvio_irq;         /* Security violation interrupt number */
  86         int virt_en;            /* Virtualization enabled in CAAM */
  87
  88 #define RNG4_MAX_HANDLES 2
  89         /* RNG4 block */
  90         u32 rng4_sh_init;       /* This bitmap shows which of the State
  91                                    Handles of the RNG4 block are initialized
  92                                    by this driver */
  93
  94         struct clk *caam_ipg;
  95         struct clk *caam_mem;
  96         struct clk *caam_aclk;
  97         struct clk *caam_emi_slow;
  98
  99         /*
 100          * debugfs entries for developer view into driver/device
 101          * variables at runtime.
 102          */
 103 #ifdef CONFIG_DEBUG_FS
 104         struct dentry *dfs_root;
 105         struct dentry *ctl; /* controller dir */
 106         struct debugfs_blob_wrapper ctl_kek_wrap, ctl_tkek_wrap, ctl_tdsk_wrap;
 107         struct dentry *ctl_kek, *ctl_tkek, *ctl_tdsk;
 108 #endif
 109 };
 110
 111 void caam_jr_algapi_init(struct device *dev);
 112 void caam_jr_algapi_remove(struct device *dev);
 113
 114 #ifdef CONFIG_DEBUG_FS
 115 static int caam_debugfs_u64_get(void *data, u64 *val)
 116 {
 117         *val = caam64_to_cpu(*(u64 *)data);
 118         return 0;
 119 }
 120
 121 static int caam_debugfs_u32_get(void *data, u64 *val)
 122 {
 123         *val = caam32_to_cpu(*(u32 *)data);
 124         return 0;
 125 }
 126
 127 DEFINE_SIMPLE_ATTRIBUTE(caam_fops_u32_ro, caam_debugfs_u32_get, NULL, "%llu\n");
 128 DEFINE_SIMPLE_ATTRIBUTE(caam_fops_u64_ro, caam_debugfs_u64_get, NULL, "%llu\n");
 129 #endif
 130
 131 #endif /* INTERN_H */