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alistair23-linux/drivers/crypto/talitos.h
LEROY Christophe 6f65f6ac5f crypto: talitos - implement scatter/gather copy for SEC1 
SEC1 doesn't support scatter/gather, SEC1 doesn't handle link tables.
Therefore, for SEC1 we have to do it by SW. For that, we reserve
space at the end of the extended descriptor, in lieu of the space
reserved for the link tables on SEC2, and we perform sg_copy() when
preparing the descriptors

We also adapt the max buffer size which is only 32k on SEC1 while it
is 64k on SEC2+

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-04-21 09:14:42 +08:00

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/*
* Freescale SEC (talitos) device register and descriptor header defines
*
* Copyright (c) 2006-2011 Freescale Semiconductor, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#define TALITOS_TIMEOUT 100000
#define TALITOS1_MAX_DATA_LEN 32768
#define TALITOS2_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 {
union {
struct { /* SEC2 format */
__be16 len; /* length */
u8 j_extent; /* jump to sg link table and/or extent*/
u8 eptr; /* extended address */
};
struct { /* SEC1 format */
__be16 res;
__be16 len1; /* length */
};
};
__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 */
union {
__be32 hdr_lo; /* header low bits */
__be32 hdr1; /* header for SEC1 */
};
struct talitos_ptr ptr[7]; /* ptr/len pair array */
__be32 next_desc; /* next descriptor (SEC1) */
};
#define TALITOS_DESC_SIZE (sizeof(struct talitos_desc) - sizeof(__be32))
/**
* 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;
void __iomem *reg_deu;
void __iomem *reg_aesu;
void __iomem *reg_mdeu;
void __iomem *reg_afeu;
void __iomem *reg_rngu;
void __iomem *reg_pkeu;
void __iomem *reg_keu;
void __iomem *reg_crcu;
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
#define TALITOS_FTR_SEC1 0x00000010
/*
* If both CONFIG_CRYPTO_DEV_TALITOS1 and CONFIG_CRYPTO_DEV_TALITOS2 are
* defined, we check the features which are set according to the device tree.
* Otherwise, we answer true or false directly
*/
static inline bool has_ftr_sec1(struct talitos_private *priv)
{
#if defined(CONFIG_CRYPTO_DEV_TALITOS1) && defined(CONFIG_CRYPTO_DEV_TALITOS2)
return priv->features & TALITOS_FTR_SEC1 ? true : false;
#elif defined(CONFIG_CRYPTO_DEV_TALITOS1)
return true;
#else
return false;
#endif
}
/*
* TALITOS_xxx_LO addresses point to the low data bits (32-63) of the register
*/
#define ISR1_FORMAT(x) (((x) << 28) | ((x) << 16))
#define ISR2_FORMAT(x) (((x) << 4) | (x))
/* global register offset addresses */
#define TALITOS_MCR 0x1030 /* master control register */
#define TALITOS_MCR_RCA0 (1 << 15) /* remap channel 0 */
#define TALITOS_MCR_RCA1 (1 << 14) /* remap channel 1 */
#define TALITOS_MCR_RCA2 (1 << 13) /* remap channel 2 */
#define TALITOS_MCR_RCA3 (1 << 12) /* remap channel 3 */
#define TALITOS1_MCR_SWR 0x1000000 /* s/w reset */
#define TALITOS2_MCR_SWR 0x1 /* s/w reset */
#define TALITOS_MCR_LO 0x1034
#define TALITOS_IMR 0x1008 /* interrupt mask register */
/* enable channel IRQs */
#define TALITOS1_IMR_INIT ISR1_FORMAT(0xf)
#define TALITOS1_IMR_DONE ISR1_FORMAT(0x5) /* done IRQs */
/* enable channel IRQs */
#define TALITOS2_IMR_INIT (ISR2_FORMAT(0xf) | 0x10000)
#define TALITOS2_IMR_DONE ISR1_FORMAT(0x5) /* done IRQs */
#define TALITOS_IMR_LO 0x100C
#define TALITOS1_IMR_LO_INIT 0x2000000 /* allow RNGU error IRQs */
#define TALITOS2_IMR_LO_INIT 0x20000 /* allow RNGU error IRQs */
#define TALITOS_ISR 0x1010 /* interrupt status register */
#define TALITOS1_ISR_4CHERR ISR1_FORMAT(0xa) /* 4 ch errors mask */
#define TALITOS1_ISR_4CHDONE ISR1_FORMAT(0x5) /* 4 ch done mask */
#define TALITOS1_ISR_TEA_ERR 0x00000040
#define TALITOS2_ISR_4CHERR ISR2_FORMAT(0xa) /* 4 ch errors mask */
#define TALITOS2_ISR_4CHDONE ISR2_FORMAT(0x5) /* 4 ch done mask */
#define TALITOS2_ISR_CH_0_2_ERR ISR2_FORMAT(0x2) /* ch 0, 2 err mask */
#define TALITOS2_ISR_CH_0_2_DONE ISR2_FORMAT(0x1) /* ch 0, 2 done mask */
#define TALITOS2_ISR_CH_1_3_ERR ISR2_FORMAT(0x8) /* ch 1, 3 err mask */
#define TALITOS2_ISR_CH_1_3_DONE ISR2_FORMAT(0x4) /* ch 1, 3 done mask */
#define TALITOS_ISR_LO 0x1014
#define TALITOS_ICR 0x1018 /* interrupt clear register */
#define TALITOS_ICR_LO 0x101C
/* channel register address stride */
#define TALITOS_CH_BASE_OFFSET 0x1000 /* default channel map base */
#define TALITOS1_CH_STRIDE 0x1000
#define TALITOS2_CH_STRIDE 0x100
/* channel configuration register */
#define TALITOS_CCCR 0x8
#define TALITOS2_CCCR_CONT 0x2 /* channel continue on SEC2 */
#define TALITOS2_CCCR_RESET 0x1 /* channel reset on SEC2 */
#define TALITOS_CCCR_LO 0xc
#define TALITOS_CCCR_LO_IWSE 0x80 /* chan. ICCR writeback enab. */
#define TALITOS_CCCR_LO_EAE 0x20 /* extended address enable */
#define TALITOS_CCCR_LO_CDWE 0x10 /* chan. done writeback enab. */
#define TALITOS_CCCR_LO_NT 0x4 /* notification type */
#define TALITOS_CCCR_LO_CDIE 0x2 /* channel done IRQ enable */
#define TALITOS1_CCCR_LO_RESET 0x1 /* channel reset on SEC1 */
/* CCPSR: channel pointer status register */
#define TALITOS_CCPSR 0x10
#define TALITOS_CCPSR_LO 0x14
#define TALITOS_CCPSR_LO_DOF 0x8000 /* double FF write oflow error */
#define TALITOS_CCPSR_LO_SOF 0x4000 /* single FF write oflow error */
#define TALITOS_CCPSR_LO_MDTE 0x2000 /* master data transfer error */
#define TALITOS_CCPSR_LO_SGDLZ 0x1000 /* s/g data len zero error */
#define TALITOS_CCPSR_LO_FPZ 0x0800 /* fetch ptr zero error */
#define TALITOS_CCPSR_LO_IDH 0x0400 /* illegal desc hdr error */
#define TALITOS_CCPSR_LO_IEU 0x0200 /* invalid EU error */
#define TALITOS_CCPSR_LO_EU 0x0100 /* EU error detected */
#define TALITOS_CCPSR_LO_GB 0x0080 /* gather boundary error */
#define TALITOS_CCPSR_LO_GRL 0x0040 /* gather return/length error */
#define TALITOS_CCPSR_LO_SB 0x0020 /* scatter boundary error */
#define TALITOS_CCPSR_LO_SRL 0x0010 /* scatter return/length error */
/* channel fetch fifo register */
#define TALITOS_FF 0x48
#define TALITOS_FF_LO 0x4c
/* current descriptor pointer register */
#define TALITOS_CDPR 0x40
#define TALITOS_CDPR_LO 0x44
/* descriptor buffer register */
#define TALITOS_DESCBUF 0x80
#define TALITOS_DESCBUF_LO 0x84
/* gather link table */
#define TALITOS_GATHER 0xc0
#define TALITOS_GATHER_LO 0xc4
/* scatter link table */
#define TALITOS_SCATTER 0xe0
#define TALITOS_SCATTER_LO 0xe4
/* execution unit registers base */
#define TALITOS2_DEU 0x2000
#define TALITOS2_AESU 0x4000
#define TALITOS2_MDEU 0x6000
#define TALITOS2_AFEU 0x8000
#define TALITOS2_RNGU 0xa000
#define TALITOS2_PKEU 0xc000
#define TALITOS2_KEU 0xe000
#define TALITOS2_CRCU 0xf000
#define TALITOS12_AESU 0x4000
#define TALITOS12_DEU 0x5000
#define TALITOS12_MDEU 0x6000
#define TALITOS10_AFEU 0x8000
#define TALITOS10_DEU 0xa000
#define TALITOS10_MDEU 0xc000
#define TALITOS10_RNGU 0xe000
#define TALITOS10_PKEU 0x10000
#define TALITOS10_AESU 0x12000
/* execution unit interrupt status registers */
#define TALITOS_EUDSR 0x10 /* data size */
#define TALITOS_EUDSR_LO 0x14
#define TALITOS_EURCR 0x18 /* reset control*/
#define TALITOS_EURCR_LO 0x1c
#define TALITOS_EUSR 0x28 /* rng status */
#define TALITOS_EUSR_LO 0x2c
#define TALITOS_EUISR 0x30
#define TALITOS_EUISR_LO 0x34
#define TALITOS_EUICR 0x38 /* int. control */
#define TALITOS_EUICR_LO 0x3c
#define TALITOS_EU_FIFO 0x800 /* output FIFO */
#define TALITOS_EU_FIFO_LO 0x804 /* output FIFO */
/* DES unit */
#define TALITOS1_DEUICR_KPE 0x00200000 /* Key Parity Error */
/* message digest unit */
#define TALITOS_MDEUICR_LO_ICE 0x4000 /* integrity check IRQ enable */
/* random number unit */
#define TALITOS_RNGUSR_LO_RD 0x1 /* reset done */
#define TALITOS_RNGUSR_LO_OFL 0xff0000/* output FIFO length */
#define TALITOS_RNGURCR_LO_SR 0x1 /* software reset */
#define TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256 0x28
#define TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512 0x48
/*
* talitos descriptor header (hdr) bits
*/
/* written back when done */
#define DESC_HDR_DONE cpu_to_be32(0xff000000)
#define DESC_HDR_LO_ICCR1_MASK cpu_to_be32(0x00180000)
#define DESC_HDR_LO_ICCR1_PASS cpu_to_be32(0x00080000)
#define DESC_HDR_LO_ICCR1_FAIL cpu_to_be32(0x00100000)
/* primary execution unit select */
#define DESC_HDR_SEL0_MASK cpu_to_be32(0xf0000000)
#define DESC_HDR_SEL0_AFEU cpu_to_be32(0x10000000)
#define DESC_HDR_SEL0_DEU cpu_to_be32(0x20000000)
#define DESC_HDR_SEL0_MDEUA cpu_to_be32(0x30000000)
#define DESC_HDR_SEL0_MDEUB cpu_to_be32(0xb0000000)
#define DESC_HDR_SEL0_RNG cpu_to_be32(0x40000000)
#define DESC_HDR_SEL0_PKEU cpu_to_be32(0x50000000)
#define DESC_HDR_SEL0_AESU cpu_to_be32(0x60000000)
#define DESC_HDR_SEL0_KEU cpu_to_be32(0x70000000)
#define DESC_HDR_SEL0_CRCU cpu_to_be32(0x80000000)
/* primary execution unit mode (MODE0) and derivatives */
#define DESC_HDR_MODE0_ENCRYPT cpu_to_be32(0x00100000)
#define DESC_HDR_MODE0_AESU_CBC cpu_to_be32(0x00200000)
#define DESC_HDR_MODE0_DEU_CBC cpu_to_be32(0x00400000)
#define DESC_HDR_MODE0_DEU_3DES cpu_to_be32(0x00200000)
#define DESC_HDR_MODE0_MDEU_CONT cpu_to_be32(0x08000000)
#define DESC_HDR_MODE0_MDEU_INIT cpu_to_be32(0x01000000)
#define DESC_HDR_MODE0_MDEU_HMAC cpu_to_be32(0x00800000)
#define DESC_HDR_MODE0_MDEU_PAD cpu_to_be32(0x00400000)
#define DESC_HDR_MODE0_MDEU_SHA224 cpu_to_be32(0x00300000)
#define DESC_HDR_MODE0_MDEU_MD5 cpu_to_be32(0x00200000)
#define DESC_HDR_MODE0_MDEU_SHA256 cpu_to_be32(0x00100000)
#define DESC_HDR_MODE0_MDEU_SHA1 cpu_to_be32(0x00000000)
#define DESC_HDR_MODE0_MDEUB_SHA384 cpu_to_be32(0x00000000)
#define DESC_HDR_MODE0_MDEUB_SHA512 cpu_to_be32(0x00200000)
#define DESC_HDR_MODE0_MDEU_MD5_HMAC (DESC_HDR_MODE0_MDEU_MD5 | \
DESC_HDR_MODE0_MDEU_HMAC)
#define DESC_HDR_MODE0_MDEU_SHA256_HMAC (DESC_HDR_MODE0_MDEU_SHA256 | \
DESC_HDR_MODE0_MDEU_HMAC)
#define DESC_HDR_MODE0_MDEU_SHA1_HMAC (DESC_HDR_MODE0_MDEU_SHA1 | \
DESC_HDR_MODE0_MDEU_HMAC)
/* secondary execution unit select (SEL1) */
#define DESC_HDR_SEL1_MASK cpu_to_be32(0x000f0000)
#define DESC_HDR_SEL1_MDEUA cpu_to_be32(0x00030000)
#define DESC_HDR_SEL1_MDEUB cpu_to_be32(0x000b0000)
#define DESC_HDR_SEL1_CRCU cpu_to_be32(0x00080000)
/* secondary execution unit mode (MODE1) and derivatives */
#define DESC_HDR_MODE1_MDEU_CICV cpu_to_be32(0x00004000)
#define DESC_HDR_MODE1_MDEU_INIT cpu_to_be32(0x00001000)
#define DESC_HDR_MODE1_MDEU_HMAC cpu_to_be32(0x00000800)
#define DESC_HDR_MODE1_MDEU_PAD cpu_to_be32(0x00000400)
#define DESC_HDR_MODE1_MDEU_SHA224 cpu_to_be32(0x00000300)
#define DESC_HDR_MODE1_MDEU_MD5 cpu_to_be32(0x00000200)
#define DESC_HDR_MODE1_MDEU_SHA256 cpu_to_be32(0x00000100)
#define DESC_HDR_MODE1_MDEU_SHA1 cpu_to_be32(0x00000000)
#define DESC_HDR_MODE1_MDEUB_SHA384 cpu_to_be32(0x00000000)
#define DESC_HDR_MODE1_MDEUB_SHA512 cpu_to_be32(0x00000200)
#define DESC_HDR_MODE1_MDEU_MD5_HMAC (DESC_HDR_MODE1_MDEU_MD5 | \
DESC_HDR_MODE1_MDEU_HMAC)
#define DESC_HDR_MODE1_MDEU_SHA256_HMAC (DESC_HDR_MODE1_MDEU_SHA256 | \
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)
/* request done notification (DN) */
#define DESC_HDR_DONE_NOTIFY cpu_to_be32(0x00000001)
/* descriptor types */
#define DESC_HDR_TYPE_AESU_CTR_NONSNOOP cpu_to_be32(0 << 3)
#define DESC_HDR_TYPE_IPSEC_ESP cpu_to_be32(1 << 3)
#define DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU cpu_to_be32(2 << 3)
#define DESC_HDR_TYPE_HMAC_SNOOP_NO_AFEU cpu_to_be32(4 << 3)
/* link table extent field bits */
#define DESC_PTR_LNKTBL_JUMP 0x80
#define DESC_PTR_LNKTBL_RETURN 0x02
#define DESC_PTR_LNKTBL_NEXT 0x01
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