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Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The job ring init function creates a platform device for each job ring.
While the job ring is shutdown, e.g. while caam module removal, its
platform device was not being removed. This leads to failure while
reinsertion and then removal of caam module second time.
The following kernel crash dump appears when caam module is reinserted
and then removed again. This patch fixes it.
root@p4080ds:~# rmmod caam.ko
Unable to handle kernel paging request for data at address 0x00000008
Faulting instruction address: 0xf94aca18
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=8 P4080 DS
Modules linked in: caam(-) qoriq_dbg(O) [last unloaded: caam]
NIP: f94aca18 LR: f94aca18 CTR: c029f950
REGS: eac47d60 TRAP: 0300 Tainted: G O (3.8.4-rt2)
MSR: 00029002 <CE,EE,ME> CR: 22022484 XER: 20000000
DEAR: 00000008, ESR: 00000000
TASK = e49dfaf0[2110] 'rmmod' THREAD: eac46000 CPU: 1
GPR00: f94ad3f4 eac47e10 e49dfaf0 00000000 00000005 ea2ac210 ffffffff 00000000
GPR08: c286de68 e4977ce0 c029b1c0 00000001 c029f950 10029738 00000000 100e0000
GPR16: 00000000 10023d00 1000cbdc 1000cb8c 1000cbb8 00000000 c07dfecc 00000000
GPR24: c07e0000 00000000 1000cbd8 f94e0000 ffffffff 00000000 ea53cd40 00000000
NIP [f94aca18] caam_reset_hw_jr+0x18/0x1c0 [caam]
LR [f94aca18] caam_reset_hw_jr+0x18/0x1c0 [caam]
Call Trace:
[eac47e10] [eac47e30] 0xeac47e30 (unreliable)
[eac47e20] [f94ad3f4] caam_jr_shutdown+0x34/0x220 [caam]
[eac47e60] [f94ac0e4] caam_remove+0x54/0xb0 [caam]
[eac47e80] [c029fb38] __device_release_driver+0x68/0x120
[eac47e90] [c02a05c8] driver_detach+0xd8/0xe0
[eac47eb0] [c029f8e0] bus_remove_driver+0xa0/0x110
[eac47ed0] [c00768e4] sys_delete_module+0x144/0x270
[eac47f40] [c000e2f0] ret_from_syscall+0x0/0x3c
Signed-off-by: Vakul Garg <vakul@freescale.com>
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Reviewed-by: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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there is no noticeable benefit for multiple cores to process one
job ring's output ring: in fact, we can benefit from cache effects
of having the back-half stay on the core that receives a particular
ring's interrupts, and further relax general contention and the
locking involved with reading outring_used, since tasklets run
atomically.
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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caam supports ahash hmac with sha algorithms and md5.
Signed-off-by: Yuan Kang <Yuan.Kang@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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remove caam_jr_register and caam_jr_deregister
to allow sharing of job rings.
Signed-off-by: Yuan Kang <Yuan.Kang@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The SEC4 supercedes the SEC2.x/3.x as Freescale's
Integrated Security Engine. Its programming model is
incompatible with all prior versions of the SEC (talitos).
The SEC4 is also known as the Cryptographic Accelerator
and Assurance Module (CAAM); this driver is named caam.
This initial submission does not include support for Data Path
mode operation - AEAD descriptors are submitted via the job
ring interface, while the Queue Interface (QI) is enabled
for use by others. Only AEAD algorithms are implemented
at this time, for use with IPsec.
Many thanks to the Freescale STC team for their contributions
to this driver.
Signed-off-by: Steve Cornelius <sec@pobox.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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