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crypto: cavium/nitrox - fix for command corruption in queue full case with backlog submissions.

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Earlier used to post the current command without checking queue full
     after backlog submissions. So, post the current command only after
     confirming the space in queue after backlog submissions.

     Maintain host write index instead of reading device registers
     to get the next free slot to post the command.

     Return -ENOSPC in queue full case.

Signed-off-by: Srikanth Jampala <Jampala.Srikanth@cavium.com>
Reviewed-by: Gadam Sreerama <sgadam@cavium.com>
Tested-by: Jha, Chandan <Chandan.Jha@cavium.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Srikanth Jampala
2018-08-22 12:40:52 +05:30
committed by Herbert Xu
parent 0522236d4f
commit 3d7c82060d
3 changed files with 35 additions and 26 deletions
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3
drivers/crypto/cavium/nitrox/nitrox_dev.h
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@@ -35,6 +35,7 @@ struct nitrox_cmdq {
/* requests in backlog queues */
atomic_t backlog_count;
int write_idx;
/* command size 32B/64B */
u8 instr_size;
u8 qno;
@@ -87,7 +88,7 @@ struct nitrox_bh {
struct bh_data *slc;
};
/* NITROX-5 driver state */
/* NITROX-V driver state */
#define NITROX_UCODE_LOADED 0
#define NITROX_READY 1