linux-kernel - [PATCH v3 10/11] dmaengine: dw-axi-dmac: move dma_chan_tx

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Message-Id: <20230521101216.4084-11-jszhang@kernel.org>
Date:   Sun, 21 May 2023 18:12:15 +0800
From:   Jisheng Zhang <jszhang@...nel.org>
To:     Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        Vinod Koul <vkoul@...nel.org>
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 10/11] dmaengine: dw-axi-dmac: move dma_chan_tx_status()

We will add polled support soon, for which we need to call
dw_axi_dma_handle_ch() in dma_chan_tx_status(). Move the function
to avoid pre-declaration.

No functionality changes.

Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
---
 .../dma/dw-axi-dmac/dw-axi-dmac-platform.c    | 84 +++++++++----------
 1 file changed, 42 insertions(+), 42 deletions(-)

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index f14fdfc9c7e9..091c15c2ec31 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -307,48 +307,6 @@ static void vchan_desc_put(struct virt_dma_desc *vdesc)
 	axi_desc_put(vd_to_axi_desc(vdesc));
 }
 
-static enum dma_status
-dma_chan_tx_status(struct dma_chan *dchan, dma_cookie_t cookie,
-		  struct dma_tx_state *txstate)
-{
-	struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan);
-	struct axi_dma_desc *desc = NULL;
-	struct virt_dma_desc *vdesc;
-	enum dma_status status;
-	u32 completed_length;
-	unsigned long flags;
-	u32 completed_blocks;
-	size_t bytes = 0;
-	u32 length;
-	u32 len;
-
-	status = dma_cookie_status(dchan, cookie, txstate);
-	if (status == DMA_COMPLETE || !txstate)
-		return status;
-
-	spin_lock_irqsave(&chan->vc.lock, flags);
-
-	vdesc = vchan_find_desc(&chan->vc, cookie);
-	if (vdesc) {
-		desc = vd_to_axi_desc(vdesc);
-	} else if (chan->desc && chan->desc->vd.tx.cookie == cookie) {
-		desc = chan->desc;
-	}
-
-	if (desc) {
-		length = desc->length;
-		completed_blocks = desc->completed_blocks;
-		len = desc->hw_desc[0].len;
-		completed_length = completed_blocks * len;
-		bytes = length - completed_length;
-	}
-
-	spin_unlock_irqrestore(&chan->vc.lock, flags);
-	dma_set_residue(txstate, bytes);
-
-	return status;
-}
-
 static void write_desc_llp(struct axi_dma_hw_desc *desc, dma_addr_t adr)
 {
 	desc->lli->llp = cpu_to_le64(adr);
@@ -1173,6 +1131,48 @@ static irqreturn_t dw_axi_dma_ch_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+static enum dma_status
+dma_chan_tx_status(struct dma_chan *dchan, dma_cookie_t cookie,
+		  struct dma_tx_state *txstate)
+{
+	struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan);
+	struct axi_dma_desc *desc = NULL;
+	struct virt_dma_desc *vdesc;
+	enum dma_status status;
+	u32 completed_length;
+	unsigned long flags;
+	u32 completed_blocks;
+	size_t bytes = 0;
+	u32 length;
+	u32 len;
+
+	status = dma_cookie_status(dchan, cookie, txstate);
+	if (status == DMA_COMPLETE || !txstate)
+		return status;
+
+	spin_lock_irqsave(&chan->vc.lock, flags);
+
+	vdesc = vchan_find_desc(&chan->vc, cookie);
+	if (vdesc) {
+		desc = vd_to_axi_desc(vdesc);
+	} else if (chan->desc && chan->desc->vd.tx.cookie == cookie) {
+		desc = chan->desc;
+	}
+
+	if (desc) {
+		length = desc->length;
+		completed_blocks = desc->completed_blocks;
+		len = desc->hw_desc[0].len;
+		completed_length = completed_blocks * len;
+		bytes = length - completed_length;
+	}
+
+	spin_unlock_irqrestore(&chan->vc.lock, flags);
+	dma_set_residue(txstate, bytes);
+
+	return status;
+}
+
 static int dma_chan_terminate_all(struct dma_chan *dchan)
 {
 	struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan);
-- 
2.40.0