dmaengine: dw-axi-dmac: Add StarFive JHxxx AxiDMA support

Add support for StarFive AxiDMA to the .compatible field.
The AxiDMA Apb region will be accessible if the compatible
string matches the "starfive,axi-dma".

Add "starfive_flush_dcache" due to VIC7100 Cache
Coherency issues.

Signed-off-by: samin <samin.guo@starfivetech.com>

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 50fb415..6136844 100644 (file)
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -32,6 +32,8 @@
 #include "../dmaengine.h"
 #include "../virt-dma.h"
 
+#include <soc/starfive/vic7100.h>
+
 /*
  * The set of bus widths supported by the DMA controller. DW AXI DMAC supports
  * master data bus width up to 512 bits (for both AXI master interfaces), but
@@ -464,6 +466,17 @@ static void axi_chan_block_xfer_start(struct axi_dma_chan *chan,
        irq_mask |= DWAXIDMAC_IRQ_SUSPENDED;
        axi_chan_irq_set(chan, irq_mask);
 
+       /*flush all the desc */
+#ifdef CONFIG_SOC_STARFIVE_VIC7100
+       if (chan->chip->multi.need_flush = true) {
+               int count = atomic_read(&chan->descs_allocated);
+               int i;
+
+               for (i = 0; i < count; i++) {
+                       starfive_flush_dcache(first->hw_desc[i].llp,
+                               sizeof(*first->hw_desc[i].lli));
+       }
+#endif
        axi_chan_enable(chan);
 }
 
@@ -1377,8 +1390,12 @@ static int parse_device_properties(struct axi_dma_chip *chip)
        if (!ret)
                chip->dw->hdata->nr_hs_if = tmp;
 
-       if (chip->dw->hdata->nr_channels > 8)
+       if (chip->dw->hdata->nr_channels > 8) {
+#ifdef CONFIG_SOC_STARFIVE_VIC7100
+               chip->multi.need_flush = true;
+#endif
                chip->multi.ch_enreg_2 = true;
+       }
 
        if (chip->dw->hdata->nr_channels > 8 || chip->dw->hdata->nr_hs_if > 16)
                chip->multi.ch_cfg_2 = true;
@@ -1581,6 +1598,7 @@ static const struct dev_pm_ops dw_axi_dma_pm_ops = {
 static const struct of_device_id dw_dma_of_id_table[] = {
        { .compatible = "snps,axi-dma-1.01a" },
        { .compatible = "intel,kmb-axi-dma" },
+       { .compatible = "starfive,axi-dma" },
        {}
 };
 MODULE_DEVICE_TABLE(of, dw_dma_of_id_table);

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
index 17c5601..6589eee 100644 (file)
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
@@ -46,6 +46,7 @@ struct dma_multi {
        bool ch_enreg_2;
        struct dma_ch_cfg cfg;
        struct dma_ch_en en;
+       bool need_flush;
 };
 
 struct dw_axi_dma_hcfg {