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 #define JOBR_UNASSIGNED 0
  13 #define JOBR_ASSIGNED 1
  14
  15 /* Currently comes from Kconfig param as a ^2 (driver-required) */
  16 #define JOBR_DEPTH (1 << CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE)
  17
  18 /* Kconfig params for interrupt coalescing if selected (else zero) */
  19 #ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_INTC
  20 #define JOBR_INTC JRCFG_ICEN
  21 #define JOBR_INTC_TIME_THLD CONFIG_CRYPTO_DEV_FSL_CAAM_INTC_TIME_THLD
  22 #define JOBR_INTC_COUNT_THLD CONFIG_CRYPTO_DEV_FSL_CAAM_INTC_COUNT_THLD
  23 #else
  24 #define JOBR_INTC 0
  25 #define JOBR_INTC_TIME_THLD 0
  26 #define JOBR_INTC_COUNT_THLD 0
  27 #endif
  28
  29 /*
  30  * Storage for tracking each in-process entry moving across a ring
  31  * Each entry on an output ring needs one of these
  32  */
  33 struct caam_jrentry_info {
  34         void (*callbk)(struct device *dev, u32 *desc, u32 status, void *arg);
  35         void *cbkarg;   /* Argument per ring entry */
  36         u32 *desc_addr_virt;    /* Stored virt addr for postprocessing */
  37         dma_addr_t desc_addr_dma;       /* Stored bus addr for done matching */
  38         u32 desc_size;  /* Stored size for postprocessing, header derived */
  39 };
  40
  41 /* Private sub-storage for a single JobR */
  42 struct caam_drv_private_jr {
  43         struct device *parentdev;       /* points back to controller dev */
  44         int ridx;
  45         struct caam_job_ring __iomem *rregs;    /* JobR's register space */
  46         struct tasklet_struct irqtask[NR_CPUS];
  47         int irq;                        /* One per queue */
  48         int assign;                     /* busy/free */
  49
  50         /* Job ring info */
  51         int ringsize;   /* Size of rings (assume input = output) */
  52         struct caam_jrentry_info *entinfo;      /* Alloc'ed 1 per ring entry */
  53         spinlock_t inplock ____cacheline_aligned; /* Input ring index lock */
  54         int inp_ring_write_index;       /* Input index "tail" */
  55         int head;                       /* entinfo (s/w ring) head index */
  56         dma_addr_t *inpring;    /* Base of input ring, alloc DMA-safe */
  57         spinlock_t outlock ____cacheline_aligned; /* Output ring index lock */
  58         int out_ring_read_index;        /* Output index "tail" */
  59         int tail;                       /* entinfo (s/w ring) tail index */
  60         struct jr_outentry *outring;    /* Base of output ring, DMA-safe */
  61 };
  62
  63 /*
  64  * Driver-private storage for a single CAAM block instance
  65  */
  66 struct caam_drv_private {
  67
  68         struct device *dev;
  69         struct device **jrdev; /* Alloc'ed array per sub-device */
  70         spinlock_t jr_alloc_lock;
  71         struct platform_device *pdev;
  72
  73         /* Physical-presence section */
  74         struct caam_ctrl *ctrl; /* controller region */
  75         struct caam_deco **deco; /* DECO/CCB views */
  76         struct caam_assurance *ac;
  77         struct caam_queue_if *qi; /* QI control region */
  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
  87         /* which jr allocated to scatterlist crypto */
  88         atomic_t tfm_count ____cacheline_aligned;
  89         int num_jrs_for_algapi;
  90         struct device **algapi_jr;
  91         /* list of registered crypto algorithms (mk generic context handle?) */
  92         struct list_head alg_list;
  93
  94         /*
  95          * debugfs entries for developer view into driver/device
  96          * variables at runtime.
  97          */
  98 #ifdef CONFIG_DEBUG_FS
  99         struct dentry *dfs_root;
 100         struct dentry *ctl; /* controller dir */
 101         struct dentry *ctl_rq_dequeued, *ctl_ob_enc_req, *ctl_ib_dec_req;
 102         struct dentry *ctl_ob_enc_bytes, *ctl_ob_prot_bytes;
 103         struct dentry *ctl_ib_dec_bytes, *ctl_ib_valid_bytes;
 104         struct dentry *ctl_faultaddr, *ctl_faultdetail, *ctl_faultstatus;
 105
 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 #endif /* INTERN_H */