[v4 12/15] dma/dpaa: qdma stall workaround for ERR050265

[Gagandeep Singh]

From: Jun Yang <jun.yang at nxp.com>

Non-prefetchable read setting in the source descriptor may be
required for targets other than local memory. Prefetchable read
setting will offer better performance for misaligned transfers
in the form of fewer transactions and should be set if possible.
This patch also fixes QDMA stall issue due to unaligned
transactions.

Signed-off-by: Jun Yang <jun.yang at nxp.com>
Signed-off-by: Gagandeep Singh <g.singh at nxp.com>
---
 config/arm/meson.build       | 3 ++-
 doc/guides/dmadevs/dpaa.rst  | 1 +
 drivers/dma/dpaa/dpaa_qdma.c | 9 +++++++++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/config/arm/meson.build b/config/arm/meson.build
index f81e466318..f63ef41130 100644
--- a/config/arm/meson.build
+++ b/config/arm/meson.build
@@ -469,7 +469,8 @@ soc_dpaa = {
         ['RTE_LIBRTE_DPAA2_USE_PHYS_IOVA', false],
         ['RTE_MAX_LCORE', 16],
         ['RTE_MAX_NUMA_NODES', 1],
-	['RTE_DMA_DPAA_ERRATA_ERR050757', true]
+	['RTE_DMA_DPAA_ERRATA_ERR050757', true],
+	['RTE_DMA_DPAA_ERRATA_ERR050265', true]
     ],
     'numa': false
 }
diff --git a/doc/guides/dmadevs/dpaa.rst b/doc/guides/dmadevs/dpaa.rst
index 746919ec6b..8a7c0befc3 100644
--- a/doc/guides/dmadevs/dpaa.rst
+++ b/doc/guides/dmadevs/dpaa.rst
@@ -43,6 +43,7 @@ For builds using ``meson`` and ``ninja``, the driver will be built when the
 target platform is dpaa-based. No additional compilation steps are necessary.
 
 - ``RTE_DMA_DPAA_ERRATA_ERR050757`` - enable software workaround for Errata-A050757
+- ``RTE_DMA_DPAA_ERRATA_ERR050265`` - enable software workaround for Errata-A050265
 
 Initialization
 --------------
diff --git a/drivers/dma/dpaa/dpaa_qdma.c b/drivers/dma/dpaa/dpaa_qdma.c
index dbc53b784f..6d8e9c8183 100644
--- a/drivers/dma/dpaa/dpaa_qdma.c
+++ b/drivers/dma/dpaa/dpaa_qdma.c
@@ -167,6 +167,9 @@ fsl_qdma_pre_comp_sd_desc(struct fsl_qdma_queue *queue)
 
 		/* Descriptor Buffer */
 		sdf->srttype = FSL_QDMA_CMD_RWTTYPE;
+#ifdef RTE_DMA_DPAA_ERRATA_ERR050265
+		sdf->prefetch = 1;
+#endif
 		ddf->dwttype = FSL_QDMA_CMD_RWTTYPE;
 		ddf->lwc = FSL_QDMA_CMD_LWC;
 
@@ -707,6 +710,9 @@ fsl_qdma_enqueue_desc_single(struct fsl_qdma_queue *fsl_queue,
 #ifdef RTE_DMA_DPAA_ERRATA_ERR050757
 	sdf = &ft->df.sdf;
 	sdf->srttype = FSL_QDMA_CMD_RWTTYPE;
+#ifdef RTE_DMA_DPAA_ERRATA_ERR050265
+	sdf->prefetch = 1;
+#endif
 	if (len > FSL_QDMA_CMD_SS_ERR050757_LEN) {
 		sdf->ssen = 1;
 		sdf->sss = FSL_QDMA_CMD_SS_ERR050757_LEN;
@@ -820,6 +826,9 @@ fsl_qdma_enqueue_desc_sg(struct fsl_qdma_queue *fsl_queue)
 #ifdef RTE_DMA_DPAA_ERRATA_ERR050757
 	sdf = &ft->df.sdf;
 	sdf->srttype = FSL_QDMA_CMD_RWTTYPE;
+#ifdef RTE_DMA_DPAA_ERRATA_ERR050265
+	sdf->prefetch = 1;
+#endif
 	if (total_len > FSL_QDMA_CMD_SS_ERR050757_LEN) {
 		sdf->ssen = 1;
 		sdf->sss = FSL_QDMA_CMD_SS_ERR050757_LEN;
-- 
2.25.1