LXR linux/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 */
  31struct 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 */
  40struct 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 */
  67struct 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        u8 mc_en;               /* Nonzero if MC f/w is active */
  86        int secvio_irq;         /* Security violation interrupt number */
  87        int virt_en;            /* Virtualization enabled in CAAM */
  88        int era;                /* CAAM Era (internal HW revision) */
  89
  90#define RNG4_MAX_HANDLES 2
  91        /* RNG4 block */
  92        u32 rng4_sh_init;       /* This bitmap shows which of the State
  93                                   Handles of the RNG4 block are initialized
  94                                   by this driver */
  95
  96        struct clk *caam_ipg;
  97        struct clk *caam_mem;
  98        struct clk *caam_aclk;
  99        struct clk *caam_emi_slow;
 100
 101        /*
 102         * debugfs entries for developer view into driver/device
 103         * variables at runtime.
 104         */
 105#ifdef CONFIG_DEBUG_FS
 106        struct dentry *dfs_root;
 107        struct dentry *ctl; /* controller dir */
 108        struct debugfs_blob_wrapper ctl_kek_wrap, ctl_tkek_wrap, ctl_tdsk_wrap;
 109#endif
 110};
 111
 112void caam_jr_algapi_init(struct device *dev);
 113void caam_jr_algapi_remove(struct device *dev);
 114
 115#ifdef CONFIG_DEBUG_FS
 116static int caam_debugfs_u64_get(void *data, u64 *val)
 117{
 118        *val = caam64_to_cpu(*(u64 *)data);
 119        return 0;
 120}
 121
 122static int caam_debugfs_u32_get(void *data, u64 *val)
 123{
 124        *val = caam32_to_cpu(*(u32 *)data);
 125        return 0;
 126}
 127
 128DEFINE_SIMPLE_ATTRIBUTE(caam_fops_u32_ro, caam_debugfs_u32_get, NULL, "%llu\n");
 129DEFINE_SIMPLE_ATTRIBUTE(caam_fops_u64_ro, caam_debugfs_u64_get, NULL, "%llu\n");
 130#endif
 131
 132#endif /* INTERN_H */
 133