[PATCH v2 2/5] dmaengine: dw-edma-pcie: don't touch internal struct dw_edma

[Frank Li <Frank.Li@nxp.com>]

"struct dw_edma" is an internal structure of the eDMA core. This should not be
used by the eDMA controllers like "dw-edma-pcie" for passing the controller
specific information to the core.

Instead, use the fields local to the "struct dw_edma_chip" for passing the
controller specific info to the core.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
Change from v1 to v2:
 - rework commit message
 - rg_region only use virtual address. using chip->reg_base instead

 drivers/dma/dw-edma/dw-edma-pcie.c | 83 ++++++++++++------------------
 1 file changed, 34 insertions(+), 49 deletions(-)

diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index 44f6e09bdb531..7732537f96086 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -148,7 +148,6 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	struct dw_edma_pcie_data vsec_data;
 	struct device *dev = &pdev->dev;
 	struct dw_edma_chip *chip;
-	struct dw_edma *dw;
 	int err, nr_irqs;
 	int i, mask;
 
@@ -214,10 +213,6 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	if (!chip)
 		return -ENOMEM;
 
-	dw = devm_kzalloc(dev, sizeof(*dw), GFP_KERNEL);
-	if (!dw)
-		return -ENOMEM;
-
 	/* IRQs allocation */
 	nr_irqs = pci_alloc_irq_vectors(pdev, 1, vsec_data.irqs,
 					PCI_IRQ_MSI | PCI_IRQ_MSIX);
@@ -228,29 +223,23 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	}
 
 	/* Data structure initialization */
-	chip->dw = dw;
 	chip->dev = dev;
 	chip->id = pdev->devfn;
-	chip->irq = pdev->irq;
 
-	dw->mf = vsec_data.mf;
-	dw->nr_irqs = nr_irqs;
-	dw->ops = &dw_edma_pcie_core_ops;
-	dw->wr_ch_cnt = vsec_data.wr_ch_cnt;
-	dw->rd_ch_cnt = vsec_data.rd_ch_cnt;
+	chip->mf = vsec_data.mf;
+	chip->nr_irqs = nr_irqs;
+	chip->ops = &dw_edma_pcie_core_ops;
 
-	dw->rg_region.vaddr = pcim_iomap_table(pdev)[vsec_data.rg.bar];
-	if (!dw->rg_region.vaddr)
-		return -ENOMEM;
+	chip->ll_wr_cnt = vsec_data.wr_ch_cnt;
+	chip->ll_rd_cnt = vsec_data.rd_ch_cnt;
 
-	dw->rg_region.vaddr += vsec_data.rg.off;
-	dw->rg_region.paddr = pdev->resource[vsec_data.rg.bar].start;
-	dw->rg_region.paddr += vsec_data.rg.off;
-	dw->rg_region.sz = vsec_data.rg.sz;
+	chip->reg_base = pcim_iomap_table(pdev)[vsec_data.rg.bar];
+	if (!chip->reg_base)
+		return -ENOMEM;
 
-	for (i = 0; i < dw->wr_ch_cnt; i++) {
-		struct dw_edma_region *ll_region = &dw->ll_region_wr[i];
-		struct dw_edma_region *dt_region = &dw->dt_region_wr[i];
+	for (i = 0; i < chip->ll_wr_cnt; i++) {
+		struct dw_edma_region *ll_region = &chip->ll_region_wr[i];
+		struct dw_edma_region *dt_region = &chip->dt_region_wr[i];
 		struct dw_edma_block *ll_block = &vsec_data.ll_wr[i];
 		struct dw_edma_block *dt_block = &vsec_data.dt_wr[i];
 
@@ -273,9 +262,9 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 		dt_region->sz = dt_block->sz;
 	}
 
-	for (i = 0; i < dw->rd_ch_cnt; i++) {
-		struct dw_edma_region *ll_region = &dw->ll_region_rd[i];
-		struct dw_edma_region *dt_region = &dw->dt_region_rd[i];
+	for (i = 0; i < chip->ll_rd_cnt; i++) {
+		struct dw_edma_region *ll_region = &chip->ll_region_rd[i];
+		struct dw_edma_region *dt_region = &chip->dt_region_rd[i];
 		struct dw_edma_block *ll_block = &vsec_data.ll_rd[i];
 		struct dw_edma_block *dt_block = &vsec_data.dt_rd[i];
 
@@ -299,45 +288,45 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	}
 
 	/* Debug info */
-	if (dw->mf == EDMA_MF_EDMA_LEGACY)
-		pci_dbg(pdev, "Version:\teDMA Port Logic (0x%x)\n", dw->mf);
-	else if (dw->mf == EDMA_MF_EDMA_UNROLL)
-		pci_dbg(pdev, "Version:\teDMA Unroll (0x%x)\n", dw->mf);
-	else if (dw->mf == EDMA_MF_HDMA_COMPAT)
-		pci_dbg(pdev, "Version:\tHDMA Compatible (0x%x)\n", dw->mf);
+	if (chip->mf == EDMA_MF_EDMA_LEGACY)
+		pci_dbg(pdev, "Version:\teDMA Port Logic (0x%x)\n", chip->mf);
+	else if (chip->mf == EDMA_MF_EDMA_UNROLL)
+		pci_dbg(pdev, "Version:\teDMA Unroll (0x%x)\n", chip->mf);
+	else if (chip->mf == EDMA_MF_HDMA_COMPAT)
+		pci_dbg(pdev, "Version:\tHDMA Compatible (0x%x)\n", chip->mf);
 	else
-		pci_dbg(pdev, "Version:\tUnknown (0x%x)\n", dw->mf);
+		pci_dbg(pdev, "Version:\tUnknown (0x%x)\n", chip->mf);
 
-	pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
+	pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p)\n",
 		vsec_data.rg.bar, vsec_data.rg.off, vsec_data.rg.sz,
-		dw->rg_region.vaddr, &dw->rg_region.paddr);
+		chip->reg_base);
 
 
-	for (i = 0; i < dw->wr_ch_cnt; i++) {
+	for (i = 0; i < chip->ll_wr_cnt; i++) {
 		pci_dbg(pdev, "L. List:\tWRITE CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
 			i, vsec_data.ll_wr[i].bar,
-			vsec_data.ll_wr[i].off, dw->ll_region_wr[i].sz,
-			dw->ll_region_wr[i].vaddr, &dw->ll_region_wr[i].paddr);
+			vsec_data.ll_wr[i].off, chip->ll_region_wr[i].sz,
+			chip->ll_region_wr[i].vaddr, &chip->ll_region_wr[i].paddr);
 
 		pci_dbg(pdev, "Data:\tWRITE CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
 			i, vsec_data.dt_wr[i].bar,
-			vsec_data.dt_wr[i].off, dw->dt_region_wr[i].sz,
-			dw->dt_region_wr[i].vaddr, &dw->dt_region_wr[i].paddr);
+			vsec_data.dt_wr[i].off, chip->dt_region_wr[i].sz,
+			chip->dt_region_wr[i].vaddr, &chip->dt_region_wr[i].paddr);
 	}
 
-	for (i = 0; i < dw->rd_ch_cnt; i++) {
+	for (i = 0; i < chip->ll_rd_cnt; i++) {
 		pci_dbg(pdev, "L. List:\tREAD CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
 			i, vsec_data.ll_rd[i].bar,
-			vsec_data.ll_rd[i].off, dw->ll_region_rd[i].sz,
-			dw->ll_region_rd[i].vaddr, &dw->ll_region_rd[i].paddr);
+			vsec_data.ll_rd[i].off, chip->ll_region_rd[i].sz,
+			chip->ll_region_rd[i].vaddr, &chip->ll_region_rd[i].paddr);
 
 		pci_dbg(pdev, "Data:\tREAD CH%.2u, BAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n",
 			i, vsec_data.dt_rd[i].bar,
-			vsec_data.dt_rd[i].off, dw->dt_region_rd[i].sz,
-			dw->dt_region_rd[i].vaddr, &dw->dt_region_rd[i].paddr);
+			vsec_data.dt_rd[i].off, chip->dt_region_rd[i].sz,
+			chip->dt_region_rd[i].vaddr, &chip->dt_region_rd[i].paddr);
 	}
 
-	pci_dbg(pdev, "Nr. IRQs:\t%u\n", dw->nr_irqs);
+	pci_dbg(pdev, "Nr. IRQs:\t%u\n", chip->nr_irqs);
 
 	/* Validating if PCI interrupts were enabled */
 	if (!pci_dev_msi_enabled(pdev)) {
@@ -345,10 +334,6 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 		return -EPERM;
 	}
 
-	dw->irq = devm_kcalloc(dev, nr_irqs, sizeof(*dw->irq), GFP_KERNEL);
-	if (!dw->irq)
-		return -ENOMEM;
-
 	/* Starting eDMA driver */
 	err = dw_edma_probe(chip);
 	if (err) {
-- 
2.24.0.rc1