[PATCH 08/12] dmaengine: dw-edma-pcie: Add raw slave address match flag

[Koichiro Den]

Add a match-data flag for devices whose DMA slave address is already in
the DMA controller address domain. Such devices do not need the
dw-edma-pcie pci_address callback, which translates a CPU MMIO address
back to a PCI bus address.

When the flag is set, select platform ops without a pci_address callback
so dw-edma core passes the slave address through unchanged.

No functional change intended. Existing matches do not set the new flag
and continue to use dw_edma_pcie_address().

Signed-off-by: Koichiro Den <den@xxxxxxxxxxxxx>
---
 drivers/dma/dw-edma/dw-edma-pcie.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index cf2f09f1891c..651269708cc5 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -87,6 +87,7 @@ struct dw_edma_pcie_match_data {
 };
 
 #define DW_EDMA_PCIE_F_DEVMEM_PHYS_OFF	BIT(0)
+#define DW_EDMA_PCIE_F_RAW_SLAVE_ADDR	BIT(1)
 
 static const struct dw_edma_pcie_data snps_edda_data = {
 	/* eDMA registers location */
@@ -208,6 +209,10 @@ static const struct dw_edma_plat_ops dw_edma_pcie_plat_ops = {
 	.pci_address = dw_edma_pcie_address,
 };
 
+static const struct dw_edma_plat_ops dw_edma_pcie_raw_addr_plat_ops = {
+	.irq_vector = dw_edma_pcie_irq_vector,
+};
+
 static void dw_edma_pcie_get_synopsys_dma_data(struct pci_dev *pdev,
 					       struct dw_edma_pcie_data *pdata)
 {
@@ -435,7 +440,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	chip->mf = dma_data->mf;
 	chip->default_irq_mode = match->default_irq_mode;
 	chip->nr_irqs = nr_irqs;
-	chip->ops = &dw_edma_pcie_plat_ops;
+	chip->ops = match->flags & DW_EDMA_PCIE_F_RAW_SLAVE_ADDR ?
+		    &dw_edma_pcie_raw_addr_plat_ops : &dw_edma_pcie_plat_ops;
 	chip->cfg_non_ll = non_ll;
 
 	chip->ll_wr_cnt = dma_data->wr_ch_cnt;
-- 
2.51.0