diff options
Diffstat (limited to 'drivers/crypto/talitos.h')
| -rw-r--r-- | drivers/crypto/talitos.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/crypto/talitos.h b/drivers/crypto/talitos.h index 3c173954ef29..61a14054aa39 100644 --- a/drivers/crypto/talitos.h +++ b/drivers/crypto/talitos.h @@ -28,6 +28,123 @@ * */ +#define TALITOS_TIMEOUT 100000 +#define TALITOS_MAX_DATA_LEN 65535 + +#define DESC_TYPE(desc_hdr) ((be32_to_cpu(desc_hdr) >> 3) & 0x1f) +#define PRIMARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 28) & 0xf) +#define SECONDARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 16) & 0xf) + +/* descriptor pointer entry */ +struct talitos_ptr { + __be16 len; /* length */ + u8 j_extent; /* jump to sg link table and/or extent */ + u8 eptr; /* extended address */ + __be32 ptr; /* address */ +}; + +static const struct talitos_ptr zero_entry = { + .len = 0, + .j_extent = 0, + .eptr = 0, + .ptr = 0 +}; + +/* descriptor */ +struct talitos_desc { + __be32 hdr; /* header high bits */ + __be32 hdr_lo; /* header low bits */ + struct talitos_ptr ptr[7]; /* ptr/len pair array */ +}; + +/** + * talitos_request - descriptor submission request + * @desc: descriptor pointer (kernel virtual) + * @dma_desc: descriptor's physical bus address + * @callback: whom to call when descriptor processing is done + * @context: caller context (optional) + */ +struct talitos_request { + struct talitos_desc *desc; + dma_addr_t dma_desc; + void (*callback) (struct device *dev, struct talitos_desc *desc, + void *context, int error); + void *context; +}; + +/* per-channel fifo management */ +struct talitos_channel { + void __iomem *reg; + + /* request fifo */ + struct talitos_request *fifo; + + /* number of requests pending in channel h/w fifo */ + atomic_t submit_count ____cacheline_aligned; + + /* request submission (head) lock */ + spinlock_t head_lock ____cacheline_aligned; + /* index to next free descriptor request */ + int head; + + /* request release (tail) lock */ + spinlock_t tail_lock ____cacheline_aligned; + /* index to next in-progress/done descriptor request */ + int tail; +}; + +struct talitos_private { + struct device *dev; + struct platform_device *ofdev; + void __iomem *reg; + int irq[2]; + + /* SEC global registers lock */ + spinlock_t reg_lock ____cacheline_aligned; + + /* SEC version geometry (from device tree node) */ + unsigned int num_channels; + unsigned int chfifo_len; + unsigned int exec_units; + unsigned int desc_types; + + /* SEC Compatibility info */ + unsigned long features; + + /* + * length of the request fifo + * fifo_len is chfifo_len rounded up to next power of 2 + * so we can use bitwise ops to wrap + */ + unsigned int fifo_len; + + struct talitos_channel *chan; + + /* next channel to be assigned next incoming descriptor */ + atomic_t last_chan ____cacheline_aligned; + + /* request callback tasklet */ + struct tasklet_struct done_task[2]; + + /* list of registered algorithms */ + struct list_head alg_list; + + /* hwrng device */ + struct hwrng rng; +}; + +extern int talitos_submit(struct device *dev, int ch, struct talitos_desc *desc, + void (*callback)(struct device *dev, + struct talitos_desc *desc, + void *context, int error), + void *context); + +/* .features flag */ +#define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001 +#define TALITOS_FTR_HW_AUTH_CHECK 0x00000002 +#define TALITOS_FTR_SHA224_HWINIT 0x00000004 +#define TALITOS_FTR_HMAC_OK 0x00000008 + /* * TALITOS_xxx_LO addresses point to the low data bits (32-63) of the register */ @@ -209,6 +326,12 @@ DESC_HDR_MODE1_MDEU_HMAC) #define DESC_HDR_MODE1_MDEU_SHA1_HMAC (DESC_HDR_MODE1_MDEU_SHA1 | \ DESC_HDR_MODE1_MDEU_HMAC) +#define DESC_HDR_MODE1_MDEU_SHA224_HMAC (DESC_HDR_MODE1_MDEU_SHA224 | \ + DESC_HDR_MODE1_MDEU_HMAC) +#define DESC_HDR_MODE1_MDEUB_SHA384_HMAC (DESC_HDR_MODE1_MDEUB_SHA384 | \ + DESC_HDR_MODE1_MDEU_HMAC) +#define DESC_HDR_MODE1_MDEUB_SHA512_HMAC (DESC_HDR_MODE1_MDEUB_SHA512 | \ + DESC_HDR_MODE1_MDEU_HMAC) /* direction of overall data flow (DIR) */ #define DESC_HDR_DIR_INBOUND cpu_to_be32(0x00000002) |