dmaengine: fsl-edma: move common IRQ handler to common.c

Move the common part of IRQ handler from fsl-edma-main.c and
mcf-edma-main.c to fsl-edma-common.c. This eliminates redundant code, as
the both files contains mostly identical code.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20230821161617.2142561-6-Frank.Li@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: nxpfrankli

drivers/dma/fsl-edma-common.c

@@ -42,6 +42,32 @@
 
 #define EDMA_TCD		0x1000
 
+void fsl_edma_tx_chan_handler(struct fsl_edma_chan *fsl_chan)
+{
+	spin_lock(&fsl_chan->vchan.lock);
+
+	if (!fsl_chan->edesc) {
+		/* terminate_all called before */
+		spin_unlock(&fsl_chan->vchan.lock);
+		return;
+	}
+
+	if (!fsl_chan->edesc->iscyclic) {
+		list_del(&fsl_chan->edesc->vdesc.node);
+		vchan_cookie_complete(&fsl_chan->edesc->vdesc);
+		fsl_chan->edesc = NULL;
+		fsl_chan->status = DMA_COMPLETE;
+		fsl_chan->idle = true;
+	} else {
+		vchan_cyclic_callback(&fsl_chan->edesc->vdesc);
+	}
+
+	if (!fsl_chan->edesc)
+		fsl_edma_xfer_desc(fsl_chan);
+
+	spin_unlock(&fsl_chan->vchan.lock);
+}
+
 static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan)
 {
 	struct edma_regs *regs = &fsl_chan->edma->regs;

drivers/dma/fsl-edma-common.h

@@ -219,6 +219,13 @@ static inline struct fsl_edma_desc *to_fsl_edma_desc(struct virt_dma_desc *vd)
 	return container_of(vd, struct fsl_edma_desc, vdesc);
 }
 
+static inline void fsl_edma_err_chan_handler(struct fsl_edma_chan *fsl_chan)
+{
+	fsl_chan->status = DMA_ERROR;
+	fsl_chan->idle = true;
+}
+
+void fsl_edma_tx_chan_handler(struct fsl_edma_chan *fsl_chan);
 void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan);
 void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan,
 			unsigned int slot, bool enable);

drivers/dma/fsl-edma-main.c

@@ -33,7 +33,6 @@ static irqreturn_t fsl_edma_tx_handler(int irq, void *dev_id)
 	struct fsl_edma_engine *fsl_edma = dev_id;
 	unsigned int intr, ch;
 	struct edma_regs *regs = &fsl_edma->regs;
-	struct fsl_edma_chan *fsl_chan;
 
 	intr = edma_readl(fsl_edma, regs->intl);
 	if (!intr)
@@ -42,31 +41,7 @@ static irqreturn_t fsl_edma_tx_handler(int irq, void *dev_id)
 	for (ch = 0; ch < fsl_edma->n_chans; ch++) {
 		if (intr & (0x1 << ch)) {
 			edma_writeb(fsl_edma, EDMA_CINT_CINT(ch), regs->cint);
-
-			fsl_chan = &fsl_edma->chans[ch];
-
-			spin_lock(&fsl_chan->vchan.lock);
-
-			if (!fsl_chan->edesc) {
-				/* terminate_all called before */
-				spin_unlock(&fsl_chan->vchan.lock);
-				continue;
-			}
-
-			if (!fsl_chan->edesc->iscyclic) {
-				list_del(&fsl_chan->edesc->vdesc.node);
-				vchan_cookie_complete(&fsl_chan->edesc->vdesc);
-				fsl_chan->edesc = NULL;
-				fsl_chan->status = DMA_COMPLETE;
-				fsl_chan->idle = true;
-			} else {
-				vchan_cyclic_callback(&fsl_chan->edesc->vdesc);
-			}
-
-			if (!fsl_chan->edesc)
-				fsl_edma_xfer_desc(fsl_chan);
-
-			spin_unlock(&fsl_chan->vchan.lock);
+			fsl_edma_tx_chan_handler(&fsl_edma->chans[ch]);
 		}
 	}
 	return IRQ_HANDLED;
@@ -86,8 +61,7 @@ static irqreturn_t fsl_edma_err_handler(int irq, void *dev_id)
 		if (err & (0x1 << ch)) {
 			fsl_edma_disable_request(&fsl_edma->chans[ch]);
 			edma_writeb(fsl_edma, EDMA_CERR_CERR(ch), regs->cerr);
-			fsl_edma->chans[ch].status = DMA_ERROR;
-			fsl_edma->chans[ch].idle = true;
+			fsl_edma_err_chan_handler(&fsl_edma->chans[ch]);
 		}
 	}
 	return IRQ_HANDLED;

drivers/dma/mcf-edma-main.c

@@ -19,7 +19,6 @@ static irqreturn_t mcf_edma_tx_handler(int irq, void *dev_id)
 	struct fsl_edma_engine *mcf_edma = dev_id;
 	struct edma_regs *regs = &mcf_edma->regs;
 	unsigned int ch;
-	struct fsl_edma_chan *mcf_chan;
 	u64 intmap;
 
 	intmap = ioread32(regs->inth);
@@ -31,31 +30,7 @@ static irqreturn_t mcf_edma_tx_handler(int irq, void *dev_id)
 	for (ch = 0; ch < mcf_edma->n_chans; ch++) {
 		if (intmap & BIT(ch)) {
 			iowrite8(EDMA_MASK_CH(ch), regs->cint);
-
-			mcf_chan = &mcf_edma->chans[ch];
-
-			spin_lock(&mcf_chan->vchan.lock);
-
-			if (!mcf_chan->edesc) {
-				/* terminate_all called before */
-				spin_unlock(&mcf_chan->vchan.lock);
-				continue;
-			}
-
-			if (!mcf_chan->edesc->iscyclic) {
-				list_del(&mcf_chan->edesc->vdesc.node);
-				vchan_cookie_complete(&mcf_chan->edesc->vdesc);
-				mcf_chan->edesc = NULL;
-				mcf_chan->status = DMA_COMPLETE;
-				mcf_chan->idle = true;
-			} else {
-				vchan_cyclic_callback(&mcf_chan->edesc->vdesc);
-			}
-
-			if (!mcf_chan->edesc)
-				fsl_edma_xfer_desc(mcf_chan);
-
-			spin_unlock(&mcf_chan->vchan.lock);
+			fsl_edma_tx_chan_handler(&mcf_edma->chans[ch]);
 		}
 	}
 
@@ -76,8 +51,7 @@ static irqreturn_t mcf_edma_err_handler(int irq, void *dev_id)
 		if (err & BIT(ch)) {
 			fsl_edma_disable_request(&mcf_edma->chans[ch]);
 			iowrite8(EDMA_CERR_CERR(ch), regs->cerr);
-			mcf_edma->chans[ch].status = DMA_ERROR;
-			mcf_edma->chans[ch].idle = true;
+			fsl_edma_err_chan_handler(&mcf_edma->chans[ch]);
 		}
 	}