Commit Graph

18 Commits

Author SHA1 Message Date
Lee Nipper ca38a814c6 crypto: talitos - Ack done interrupt in isr instead of tasklet
Previous commit for interrupt mitigation moved the done interrupt
acknowlegement from the isr to the talitos_done tasklet.
This patch moves the done interrupt acknowledgement back
into the isr so that done interrupts will always be acknowledged.
This covers the case for acknowledging interrupts for channel done processing
that has actually already been completed by the tasklet prior to fielding
a pending interrupt.

Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:02:33 +11:00
Vishnu Suresh 4b24ea971a crypto: talitos - Preempt overflow interrupts off-by-one fix
In commit ec6644d632 "crypto: talitos - Preempt
overflow interrupts", the test in atomic_inc_not_zero was interpreted by the
author to be applied after the increment operation (not before). This off-by-one
fix prevents overflow error interrupts from occurring when requests are frequent
and large enough to do so.

Signed-off-by: Vishnu Suresh <Vishnu@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:17 +11:00
Kim Phillips fe5720e2b7 crypto: talitos - Perform auth check in h/w if on sec 2.1 and above
SEC version 2.1 and above adds the capability to do the IPSec ICV
memcmp in h/w. Results of the cmp are written back in the descriptor
header, along with the done status.  A new callback is added that
checks these ICCR bits instead of performing the memcmp on the core,
and is enabled by h/w capability.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

After testing on different parts, another condition was added
before using h/w auth check because different
SEC revisions require different handling.

The SEC 3.0 allows a more flexible link table where
the auth data can span separate link table entries.
The SEC 2.4/2.1 does not support this case.
So a test was added in the decrypt routine
for a fragmented case; the h/w auth check is disallowed for
revisions not having the extent in the link table;
in this case the hw auth check is done by software.

A portion of a previous change for SEC 3.0 link table handling
was removed since it became dead code with the hw auth check supported.

This seems to be the best compromise for using hw auth check
on supporting SEC revisions; it keeps the link table logic
simpler for the fragmented cases.

Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:12 +11:00
Lee Nipper 1c2e8811ee crypto: talitos - Implement done interrupt mitigation
In talitos_interrupt, upon one done interrupt, mask further done interrupts,
and ack only any error interrupt.
In talitos_done, unmask done interrupts after completing processing.
In flush_channel, ack each done channel processed.
Keep done overflow interrupts masked because even though each pkt
is ack'ed, a few done overflows still occur.

Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:10 +11:00
Kim Phillips 40405f10b8 crypto: talitos - Pass correct interrupt status to error handler
Since we ack early, the re-read interrupt status in talitos_error
may be already updated with a new value.  Pass the error ISR value
directly in order to report and handle the error based on the correct
error status.

Also remove unused error tasklet.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-12-25 11:01:09 +11:00
Al Viro 596f103419 fix talitos
talitos_remove() can be called from talitos_probe() on failure
exit path, so it can't be __devexit.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-30 10:03:36 -08:00
Kim Phillips ba95487df9 crypto: talitos - Avoid consecutive packets going out with same IV
The SEC's h/w IV out implementation DMAs the trailing encrypted payload
block of the last encryption to ctx->iv.  Since the last encryption may
still be pending completion, we can sufficiently prevent successive
packets from being transmitted with the same IV by xoring with sequence
number.

Also initialize alg_list earlier to prevent oopsing on a failed probe.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-09-14 13:41:19 -07:00
Lee Nipper f3c85bc1bc crypto: talitos - Add handling for SEC 3.x treatment of link table
Later SEC revision requires the link table (used for scatter/gather)
to have an extra entry to account for the total length in descriptor [4],
which contains cipher Input and ICV.
This only applies to decrypt, not encrypt.
Without this change, on 837x, a gather return/length error results
when a decryption uses a link table to gather the fragments.
This is observed by doing a ping with size of 1447 or larger with AES,
or a ping with size 1455 or larger with 3des.

So, add check for SEC compatible "fsl,3.0" for using extra link table entry.

Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-08-13 20:08:33 +10:00
Kim Phillips c0e741d478 crypto: talitos - sparse fix
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-17 20:20:59 +08:00
Kim Phillips fa86a26795 crypto: talitos - Stop leaking memory in error path
free edescriptor when returning error (such as -EAGAIN).

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Acked-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-17 20:20:06 +08:00
Kim Phillips 586725f860 crypto: talitos - Fix GFP flag usage
use GFP_ATOMIC when necessary; use atomic_t when allocating submit_count.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Acked-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-17 20:19:18 +08:00
Kim Phillips ec6644d632 crypto: talitos - Preempt overflow interrupts
add requests pending/submit count to prevent request queue full
condition by preempting h/w overflow interrupts in software.
We do this due to the delay in the delivery and handling of the
channel overflow error interrupt.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Acked-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-17 20:16:40 +08:00
Lee Nipper 695ad58969 crypto: talitos - Correct dst != src case handling
Seems that dst == src, but this fixes the logic in case it's not.

Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-17 16:22:30 +08:00
Lee Nipper 4aaf087846 crypto: talitos - Remove calls to of_node_put
Remove of_node_put calls since there is no corresponding of_node_get.
This patch prevents an exception when talitos is loaded a 2nd time.
This sequence: modprobe talitos; rmmod talitos; modprobe talitos
causes this message: "WARNING: Bad of_node_put() on /soc8349@e0000000/crypto@30000".

Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-17 15:58:08 +08:00
Lee Nipper 3952f17ed6 crypto: talitos - Add support for sha256 and md5 variants
This patch adds support for:
authenc(hmac(sha256),cbc(aes)),
authenc(hmac(sha256),cbc(des3_ede)),
authenc(hmac(md5),cbc(aes)),
authenc(hmac(md5),cbc(des3_ede)).
Some constant usage was changed to use aes, des, and sha include files.

Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:19 +08:00
Herbert Xu ebbcf33692 crypto: talitos - Use proper form for algorithm driver names
The name authenc(hmac(sha1-talitos),cbc(aes-talitos)) is potentially
ambiguous since it could also mean using the generic authenc template
on hmac(sha1-talitos) and cbc(aes-talitos).  In general, parentheses
should be reserved for templates that spawn algorithms.

This patches changes it to the form authenc-hmac-sha1-cbc-aes-talitos.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:17 +08:00
Lee Nipper 70bcaca753 crypto: talitos - Add support for 3des
This patch adds support for authenc(hmac(sha1),cbc(des3_ede))
to the talitos crypto driver for the Freescale Security Engine.
Some adjustments were made to the scatterlist to link table conversion
to make 3des work for ping -s 1439..1446.

Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:17 +08:00
Kim Phillips 9c4a79653b crypto: talitos - Freescale integrated security engine (SEC) driver
Add support for the SEC available on a wide range of PowerQUICC devices,
e.g. MPC8349E, MPC8548E.

This initial version supports authenc(hmac(sha1),cbc(aes)) for use with IPsec.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-07-10 20:35:16 +08:00