diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/804-crypto-0038-LF-838-crypto-caam-increase-the-domain-of-write-memo.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/804-crypto-0038-LF-838-crypto-caam-increase-the-domain-of-write-memo.patch | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/target/linux/layerscape/patches-5.4/804-crypto-0038-LF-838-crypto-caam-increase-the-domain-of-write-memo.patch b/target/linux/layerscape/patches-5.4/804-crypto-0038-LF-838-crypto-caam-increase-the-domain-of-write-memo.patch deleted file mode 100644 index 7cc8c5f244..0000000000 --- a/target/linux/layerscape/patches-5.4/804-crypto-0038-LF-838-crypto-caam-increase-the-domain-of-write-memo.patch +++ /dev/null @@ -1,44 +0,0 @@ -From ada13fea4dcc8419e0523614b108635d8f689000 Mon Sep 17 00:00:00 2001 -From: Iuliana Prodan <iuliana.prodan@nxp.com> -Date: Mon, 17 Feb 2020 03:05:10 +0200 -Subject: [PATCH] LF-838: crypto: caam - increase the domain of write memory - barrier to full system -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -In caam_jr_enqueue, under heavy DDR load, smp_wmb() or dma_wmb() -fail to make the input ring be updated before the CAAM starts -reading it. So, CAAM will process, again, an old descriptor address -and will put it in the output ring. This will make caam_jr_dequeue() -to fail, since this old descriptor is not in the software ring. -To fix this, use wmb() which works on the full system instead of -inner/outer shareable domains. - -Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com> -Reviewed-by: Horia Geantă <horia.geanta@nxp.com> -Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> ---- - drivers/crypto/caam/jr.c | 10 +++++++++- - 1 file changed, 9 insertions(+), 1 deletion(-) - ---- a/drivers/crypto/caam/jr.c -+++ b/drivers/crypto/caam/jr.c -@@ -434,8 +434,16 @@ int caam_jr_enqueue(struct device *dev, - * Guarantee that the descriptor's DMA address has been written to - * the next slot in the ring before the write index is updated, since - * other cores may update this index independently. -+ * -+ * Under heavy DDR load, smp_wmb() or dma_wmb() fail to make the input -+ * ring be updated before the CAAM starts reading it. So, CAAM will -+ * process, again, an old descriptor address and will put it in the -+ * output ring. This will make caam_jr_dequeue() to fail, since this -+ * old descriptor is not in the software ring. -+ * To fix this, use wmb() which works on the full system instead of -+ * inner/outer shareable domains. - */ -- smp_wmb(); -+ wmb(); - - jrp->head = (head + 1) & (JOBR_DEPTH - 1); - |