dmaengine: ti: k3-udma-glue: Add function to get device pointer for DMA API

Glue layer users should use the device of the DMA for DMA mapping and
allocations as it is the DMA which accesses to descriptors and buffers,
not the clients

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20201208090440.31792-5-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/ti/k3-udma-glue.c b/drivers/dma/ti/k3-udma-glue.c
index dfb65e382ab97efc31761c8dedcb9e94671ea55b..29d1524d191692cc20a568631bce1327b2d1bbe8 100644 (file)
--- a/drivers/dma/ti/k3-udma-glue.c
+++ b/drivers/dma/ti/k3-udma-glue.c
@@ -493,6 +493,13 @@ int k3_udma_glue_tx_get_irq(struct k3_udma_glue_tx_channel *tx_chn)
 }
 EXPORT_SYMBOL_GPL(k3_udma_glue_tx_get_irq);
 
+struct device *
+       k3_udma_glue_tx_get_dma_device(struct k3_udma_glue_tx_channel *tx_chn)
+{
+       return xudma_get_device(tx_chn->common.udmax);
+}
+EXPORT_SYMBOL_GPL(k3_udma_glue_tx_get_dma_device);
+
 static int k3_udma_glue_cfg_rx_chn(struct k3_udma_glue_rx_channel *rx_chn)
 {
        const struct udma_tisci_rm *tisci_rm = rx_chn->common.tisci_rm;
@@ -1201,3 +1208,10 @@ int k3_udma_glue_rx_get_irq(struct k3_udma_glue_rx_channel *rx_chn,
        return flow->virq;
 }
 EXPORT_SYMBOL_GPL(k3_udma_glue_rx_get_irq);
+
+struct device *
+       k3_udma_glue_rx_get_dma_device(struct k3_udma_glue_rx_channel *rx_chn)
+{
+       return xudma_get_device(rx_chn->common.udmax);
+}
+EXPORT_SYMBOL_GPL(k3_udma_glue_rx_get_dma_device);

diff --git a/drivers/dma/ti/k3-udma-private.c b/drivers/dma/ti/k3-udma-private.c
index aa24e554f7b44bca3b17021c945ed891db03283f..8ff7a264be037417e2d7414f06d6f8ef6daf50b2 100644 (file)
--- a/drivers/dma/ti/k3-udma-private.c
+++ b/drivers/dma/ti/k3-udma-private.c
@@ -50,6 +50,12 @@ struct udma_dev *of_xudma_dev_get(struct device_node *np, const char *property)
 }
 EXPORT_SYMBOL(of_xudma_dev_get);
 
+struct device *xudma_get_device(struct udma_dev *ud)
+{
+       return ud->dev;
+}
+EXPORT_SYMBOL(xudma_get_device);
+
 u32 xudma_dev_get_psil_base(struct udma_dev *ud)
 {
        return ud->psil_base;

diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index 09c4529e013d750dc08e09c72d168b2ef0ff8dab..d1cace0cb43b44238faa29bbaa698ea60a2e59ac 100644 (file)
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -112,6 +112,7 @@ int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
                            u32 dst_thread);
 
 struct udma_dev *of_xudma_dev_get(struct device_node *np, const char *property);
+struct device *xudma_get_device(struct udma_dev *ud);
 void xudma_dev_put(struct udma_dev *ud);
 u32 xudma_dev_get_psil_base(struct udma_dev *ud);
 struct udma_tisci_rm *xudma_dev_get_tisci_rm(struct udma_dev *ud);

diff --git a/include/linux/dma/k3-udma-glue.h b/include/linux/dma/k3-udma-glue.h
index 5eb34ad973a7ab6c81fdf4d3ad00acdf9345bb59..d7c12f31377ccd6684632325995a911003d795f3 100644 (file)
--- a/include/linux/dma/k3-udma-glue.h
+++ b/include/linux/dma/k3-udma-glue.h
@@ -41,6 +41,8 @@ void k3_udma_glue_reset_tx_chn(struct k3_udma_glue_tx_channel *tx_chn,
 u32 k3_udma_glue_tx_get_hdesc_size(struct k3_udma_glue_tx_channel *tx_chn);
 u32 k3_udma_glue_tx_get_txcq_id(struct k3_udma_glue_tx_channel *tx_chn);
 int k3_udma_glue_tx_get_irq(struct k3_udma_glue_tx_channel *tx_chn);
+struct device *
+       k3_udma_glue_tx_get_dma_device(struct k3_udma_glue_tx_channel *tx_chn);
 
 enum {
        K3_UDMA_GLUE_SRC_TAG_LO_KEEP = 0,
@@ -130,5 +132,7 @@ int k3_udma_glue_rx_flow_enable(struct k3_udma_glue_rx_channel *rx_chn,
                                u32 flow_idx);
 int k3_udma_glue_rx_flow_disable(struct k3_udma_glue_rx_channel *rx_chn,
                                 u32 flow_idx);
+struct device *
+       k3_udma_glue_rx_get_dma_device(struct k3_udma_glue_rx_channel *rx_chn);
 
 #endif /* K3_UDMA_GLUE_H_ */