/* Currently comes from Kconfig param as a ^2 (driver-required) */ #define JOBR_DEPTH (1 << CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE)
/* * Maximum size for crypto-engine software queue based on Job Ring * size (JOBR_DEPTH) and a THRESHOLD (reserved for the non-crypto-API * requests that are not passed through crypto-engine)
*/ #define THRESHOLD 15 #define CRYPTO_ENGINE_MAX_QLEN (JOBR_DEPTH - THRESHOLD)
/* * Storage for tracking each in-process entry moving across a ring * Each entry on an output ring needs one of these
*/ struct caam_jrentry_info { void (*callbk)(struct device *dev, u32 *desc, u32 status, void *arg); void *cbkarg; /* Argument per ring entry */
u32 *desc_addr_virt; /* Stored virt addr for postprocessing */
dma_addr_t desc_addr_dma; /* Stored bus addr for done matching */
u32 desc_size; /* Stored size for postprocessing, header derived */
};
struct caam_jr_dequeue_params { struct device *dev; int enable_itr;
};
/* Private sub-storage for a single JobR */ struct caam_drv_private_jr { struct list_head list_node; /* Job Ring device list */ struct device *dev; int ridx; struct caam_job_ring __iomem *rregs; /* JobR's register space */ struct tasklet_struct irqtask; struct caam_jr_dequeue_params tasklet_params; int irq; /* One per queue */ bool hwrng;
/* Number of scatterlist crypt transforms active on the JobR */
atomic_t tfm_count ____cacheline_aligned;
/* Job ring info */ struct caam_jrentry_info *entinfo; /* Alloc'ed 1 per ring entry */
spinlock_t inplock ____cacheline_aligned; /* Input ring index lock */
u32 inpring_avail; /* Number of free entries in input ring */ int head; /* entinfo (s/w ring) head index */ void *inpring; /* Base of input ring, alloc
* DMA-safe */ int out_ring_read_index; /* Output index "tail" */ int tail; /* entinfo (s/w ring) tail index */ void *outring; /* Base of output ring, DMA-safe */ struct crypto_engine *engine;
struct caam_jr_state state; /* State of the JR during PM */
};
/* * Driver-private storage for a single CAAM block instance
*/ struct caam_drv_private { /* Physical-presence section */ struct caam_ctrl __iomem *ctrl; /* controller region */ struct caam_deco __iomem *deco; /* DECO/CCB views */ struct caam_assurance __iomem *assure; struct caam_queue_if __iomem *qi; /* QI control region */ struct caam_job_ring __iomem *jr[4]; /* JobR's register space */
struct iommu_domain *domain;
/* * Detected geometry block. Filled in from device tree if powerpc, * or from register-based version detection code
*/
u8 total_jobrs; /* Total Job Rings in device */
u8 qi_present; /* Nonzero if QI present in device */
u8 blob_present; /* Nonzero if BLOB support present in device */
u8 mc_en; /* Nonzero if MC f/w is active */
u8 optee_en; /* Nonzero if OP-TEE f/w is active */
u8 no_page0; /* Nonzero if register page 0 is not controlled by Linux */ bool pr_support; /* RNG prediction resistance available */ int secvio_irq; /* Security violation interrupt number */ int virt_en; /* Virtualization enabled in CAAM */ int era; /* CAAM Era (internal HW revision) */
#define RNG4_MAX_HANDLES 2 /* RNG4 block */
u32 rng4_sh_init; /* This bitmap shows which of the State Handles of the RNG4 block are initialized
by this driver */
struct clk_bulk_data *clks; int num_clks; /* * debugfs entries for developer view into driver/device * variables at runtime.
*/ #ifdef CONFIG_DEBUG_FS struct dentry *ctl; /* controller dir */ struct debugfs_blob_wrapper ctl_kek_wrap, ctl_tkek_wrap, ctl_tdsk_wrap; #endif
int caam_off_during_pm; /* If the CAAM is reset after suspend */ struct caam_ctl_state state; /* State of the CTL during PM */
};
#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API
int caam_algapi_init(struct device *dev); void caam_algapi_exit(void);
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