crypto: caam/qi - fix error handling in ERN handler

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: 67c2315def06 ("crypto: caam - add Queue Interface (QI) backend support")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Reviewed-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/caam/error.c b/drivers/crypto/caam/error.c
index 4f0d458..95da6ae 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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