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Subject[PATCH v3 01/14] crypto: caam/qi - fix error handling in ERN handler
Date
From: Horia Geantă <horia.geanta@nxp.com>

ERN handler calls the caam/qi frontend "done" callback with a status
of -EIO. This is incorrect, since the callback expects a status value
meaningful for the crypto engine - hence the cryptic messages
like the one below:
platform caam_qi: 15: unknown error source

Fix this by providing the callback with:
-the status returned by the crypto engine (fd[status]) in case
it contains an error, OR
-a QI "No error" code otherwise; this will trigger the message:
platform caam_qi: 50000000: Queue Manager Interface: No error
which is fine, since QMan driver provides details about the cause of
failure

Cc: <stable@vger.kernel.org> # v5.1+
Fixes: 67c2315d ("crypto: caam - add Queue Interface (QI) backend support")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
---
Changes since v2:
-update stable version
---
drivers/crypto/caam/error.c | 1 +
drivers/crypto/caam/qi.c | 5 ++++-
drivers/crypto/caam/regs.h | 1 +
3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/caam/error.c b/drivers/crypto/caam/error.c
index 4f0d458..95da6ae 100644
--- a/drivers/crypto/caam/error.c
+++ b/drivers/crypto/caam/error.c
@@ -118,6 +118,7 @@ static const struct {
u8 value;
const char *error_text;
} qi_error_list[] = {
+ { 0x00, "No error" },
{ 0x1F, "Job terminated by FQ or ICID flush" },
{ 0x20, "FD format error"},
{ 0x21, "FD command format error"},
diff --git a/drivers/crypto/caam/qi.c b/drivers/crypto/caam/qi.c
index 0fe618e..19a378b 100644
--- a/drivers/crypto/caam/qi.c
+++ b/drivers/crypto/caam/qi.c
@@ -163,7 +163,10 @@ static void caam_fq_ern_cb(struct qman_portal *qm, struct qman_fq *fq,
dma_unmap_single(drv_req->drv_ctx->qidev, qm_fd_addr(fd),
sizeof(drv_req->fd_sgt), DMA_BIDIRECTIONAL);

- drv_req->cbk(drv_req, -EIO);
+ if (fd->status)
+ drv_req->cbk(drv_req, be32_to_cpu(fd->status));
+ else
+ drv_req->cbk(drv_req, JRSTA_SSRC_QI);
}

static struct qman_fq *create_caam_req_fq(struct device *qidev,
diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index 8591914..7c7ea8a 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -641,6 +641,7 @@ struct caam_job_ring {
#define JRSTA_SSRC_CCB_ERROR 0x20000000
#define JRSTA_SSRC_JUMP_HALT_USER 0x30000000
#define JRSTA_SSRC_DECO 0x40000000
+#define JRSTA_SSRC_QI 0x50000000
#define JRSTA_SSRC_JRERROR 0x60000000
#define JRSTA_SSRC_JUMP_HALT_CC 0x70000000

--
2.1.0
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