drivers/crypto/caam/intern.h

   1 /*
   2  * CAAM/SEC 4.x driver backend
   3  * Private/internal definitions between modules
   4  *
   5  * Copyright 2008-2011 Freescale Semiconductor, Inc.
   6  *
   7  */
   8
   9 #ifndef INTERN_H
  10 #define INTERN_H
  11
  12 /* Currently comes from Kconfig param as a ^2 (driver-required) */
  13 #define JOBR_DEPTH (1 << CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE)
  14
  15 /* Kconfig params for interrupt coalescing if selected (else zero) */
  16 #ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_INTC
  17 #define JOBR_INTC JRCFG_ICEN
  18 #define JOBR_INTC_TIME_THLD CONFIG_CRYPTO_DEV_FSL_CAAM_INTC_TIME_THLD
  19 #define JOBR_INTC_COUNT_THLD CONFIG_CRYPTO_DEV_FSL_CAAM_INTC_COUNT_THLD
  20 #else
  21 #define JOBR_INTC 0
  22 #define JOBR_INTC_TIME_THLD 0
  23 #define JOBR_INTC_COUNT_THLD 0
  24 #endif
  25
  26 /*
  27  * Storage for tracking each in-process entry moving across a ring
  28  * Each entry on an output ring needs one of these
  29  */
  30 struct caam_jrentry_info {
  31         void (*callbk)(struct device *dev, u32 *desc, u32 status, void *arg);
  32         void *cbkarg;   /* Argument per ring entry */
  33         u32 *desc_addr_virt;    /* Stored virt addr for postprocessing */
  34         dma_addr_t desc_addr_dma;       /* Stored bus addr for done matching */
  35         u32 desc_size;  /* Stored size for postprocessing, header derived */
  36 };
  37
  38 /* Private sub-storage for a single JobR */
  39 struct caam_drv_private_jr {
  40         struct device *parentdev;       /* points back to controller dev */
  41         struct platform_device *jr_pdev;/* points to platform device for JR */
  42         int ridx;
  43         struct caam_job_ring __iomem *rregs;    /* JobR's register space */
  44         struct tasklet_struct irqtask;
  45         int irq;                        /* One per queue */
  46
  47         /* Job ring info */
  48         int ringsize;   /* Size of rings (assume input = output) */
  49         struct caam_jrentry_info *entinfo;      /* Alloc'ed 1 per ring entry */
  50         spinlock_t inplock ____cacheline_aligned; /* Input ring index lock */
  51         int inp_ring_write_index;       /* Input index "tail" */
  52         int head;                       /* entinfo (s/w ring) head index */
  53         dma_addr_t *inpring;    /* Base of input ring, alloc DMA-safe */
  54         spinlock_t outlock ____cacheline_aligned; /* Output ring index lock */
  55         int out_ring_read_index;        /* Output index "tail" */
  56         int tail;                       /* entinfo (s/w ring) tail index */
  57         struct jr_outentry *outring;    /* Base of output ring, DMA-safe */
  58 };
  59
  60 /*
  61  * Driver-private storage for a single CAAM block instance
  62  */
  63 struct caam_drv_private {
  64
  65         struct device *dev;
  66         struct device **jrdev; /* Alloc'ed array per sub-device */
  67         struct platform_device *pdev;
  68
  69         /* Physical-presence section */
  70         struct caam_ctrl *ctrl; /* controller region */
  71         struct caam_deco **deco; /* DECO/CCB views */
  72         struct caam_assurance *ac;
  73         struct caam_queue_if *qi; /* QI control region */
  74
  75         /*
  76          * Detected geometry block. Filled in from device tree if powerpc,
  77          * or from register-based version detection code
  78          */
  79         u8 total_jobrs;         /* Total Job Rings in device */
  80         u8 qi_present;          /* Nonzero if QI present in device */
  81         int secvio_irq;         /* Security violation interrupt number */
  82
  83         /* which jr allocated to scatterlist crypto */
  84         atomic_t tfm_count ____cacheline_aligned;
  85         /* list of registered crypto algorithms (mk generic context handle?) */
  86         struct list_head alg_list;
  87         /* list of registered hash algorithms (mk generic context handle?) */
  88         struct list_head hash_list;
  89
  90         /*
  91          * debugfs entries for developer view into driver/device
  92          * variables at runtime.
  93          */
  94 #ifdef CONFIG_DEBUG_FS
  95         struct dentry *dfs_root;
  96         struct dentry *ctl; /* controller dir */
  97         struct dentry *ctl_rq_dequeued, *ctl_ob_enc_req, *ctl_ib_dec_req;
  98         struct dentry *ctl_ob_enc_bytes, *ctl_ob_prot_bytes;
  99         struct dentry *ctl_ib_dec_bytes, *ctl_ib_valid_bytes;
 100         struct dentry *ctl_faultaddr, *ctl_faultdetail, *ctl_faultstatus;
 101
 102         struct debugfs_blob_wrapper ctl_kek_wrap, ctl_tkek_wrap, ctl_tdsk_wrap;
 103         struct dentry *ctl_kek, *ctl_tkek, *ctl_tdsk;
 104 #endif
 105 };
 106
 107 void caam_jr_algapi_init(struct device *dev);
 108 void caam_jr_algapi_remove(struct device *dev);
 109 #endif /* INTERN_H */