linux-kernel - [PATCH 3/3] dmaengine: pl330: Add DMA

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250210061915.26218-4-aatif4.m@samsung.com>
Date: Mon, 10 Feb 2025 11:49:15 +0530
From: Aatif Mushtaq <aatif4.m@...sung.com>
To: vkoul@...nel.org, dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: pankaj.dubey@...sung.com, aswani.reddy@...sung.com, Aatif Mushtaq
	<aatif4.m@...sung.com>
Subject: [PATCH 3/3] dmaengine: pl330: Add DMA_2D capability

Add a capability to prepare DMA for 2D transfer and create a hook
between the DMA engine and the pl330 driver

Signed-off-by: Aatif Mushtaq <aatif4.m@...sung.com>
---
 drivers/dma/pl330.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 546ea442044e..ac17657413b5 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2847,6 +2847,23 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
 	return &desc->txd;
 }
 
+static struct dma_async_tx_descriptor *
+pl330_prep_2d_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
+		dma_addr_t src, size_t len, u16 src_imm,
+		u16 dst_imm, unsigned long flags)
+{
+	struct dma_pl330_desc *desc;
+	struct dma_async_tx_descriptor *tx;
+
+	tx = pl330_prep_dma_memcpy(chan, dst, src, len, flags);
+	desc = to_desc(tx);
+
+	desc->px.src_imm = src_imm;
+	desc->px.dst_imm = dst_imm;
+
+	return tx;
+}
+
 static void __pl330_giveback_desc(struct pl330_dmac *pl330,
 				  struct dma_pl330_desc *first)
 {
@@ -3157,6 +3174,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
 	pd->device_alloc_chan_resources = pl330_alloc_chan_resources;
 	pd->device_free_chan_resources = pl330_free_chan_resources;
 	pd->device_prep_dma_memcpy = pl330_prep_dma_memcpy;
+	pd->device_prep_2d_dma_memcpy = pl330_prep_2d_dma_memcpy;
 	pd->device_prep_dma_cyclic = pl330_prep_dma_cyclic;
 	pd->device_tx_status = pl330_tx_status;
 	pd->device_prep_slave_sg = pl330_prep_slave_sg;
-- 
2.17.1