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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2019-08-20 23:23:54 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-08-30 11:05:29 +0300 |
| commit | 3a0944c5362654e13cde558ef81309a0fcf9112b (patch) | |
| tree | 19baa4b5f61da4c7f459e740769b9ca81b32fa35 /drivers/crypto/caam/desc_constr.h | |
| parent | 6e05542fd6061d3862c85fd049cb953f1cf5b264 (diff) | |
| download | linux-3a0944c5362654e13cde558ef81309a0fcf9112b.tar.xz | |
crypto: caam - share definition for MAX_SDLEN
Both qi.h and cammalg_qi2.h seem to define identical versions of
MAX_SDLEN. Move it to desc_constr.h to avoid duplication.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Chris Spencer <christopher.spencer@sea.co.uk>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Horia Geantă <horia.geanta@nxp.com>
Cc: Aymen Sghaier <aymen.sghaier@nxp.com>
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/caam/desc_constr.h')
| -rw-r--r-- | drivers/crypto/caam/desc_constr.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h index 536f360bf131..1fe50a4fefaa 100644 --- a/drivers/crypto/caam/desc_constr.h +++ b/drivers/crypto/caam/desc_constr.h @@ -18,6 +18,33 @@ #define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE) #define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3) +/* + * The CAAM QI hardware constructs a job descriptor which points + * to shared descriptor (as pointed by context_a of FQ to CAAM). + * When the job descriptor is executed by deco, the whole job + * descriptor together with shared descriptor gets loaded in + * deco buffer which is 64 words long (each 32-bit). + * + * The job descriptor constructed by QI hardware has layout: + * + * HEADER (1 word) + * Shdesc ptr (1 or 2 words) + * SEQ_OUT_PTR (1 word) + * Out ptr (1 or 2 words) + * Out length (1 word) + * SEQ_IN_PTR (1 word) + * In ptr (1 or 2 words) + * In length (1 word) + * + * The shdesc ptr is used to fetch shared descriptor contents + * into deco buffer. + * + * Apart from shdesc contents, the total number of words that + * get loaded in deco buffer are '8' or '11'. The remaining words + * in deco buffer can be used for storing shared descriptor. + */ +#define MAX_SDLEN ((CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN) / CAAM_CMD_SZ) + #ifdef DEBUG #define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\ &__func__[sizeof("append")]); } while (0) |