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 list_head        list_node;      /* Job Ring device list */
  41         struct device           *dev;
  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         /* Number of scatterlist crypt transforms active on the JobR */
  48         atomic_t tfm_count ____cacheline_aligned;
  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 platform_device **jrpdev; /* Alloc'ed array per sub-device */
  70         struct platform_device *pdev;
  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 dentry *ctl_rq_dequeued, *ctl_ob_enc_req, *ctl_ib_dec_req;
 107         struct dentry *ctl_ob_enc_bytes, *ctl_ob_prot_bytes;
 108         struct dentry *ctl_ib_dec_bytes, *ctl_ib_valid_bytes;
 109         struct dentry *ctl_faultaddr, *ctl_faultdetail, *ctl_faultstatus;
 110
 111         struct debugfs_blob_wrapper ctl_kek_wrap, ctl_tkek_wrap, ctl_tdsk_wrap;
 112         struct dentry *ctl_kek, *ctl_tkek, *ctl_tdsk;
 113 #endif
 114 };
 115
 116 void caam_jr_algapi_init(struct device *dev);
 117 void caam_jr_algapi_remove(struct device *dev);
 118 #endif /* INTERN_H */