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

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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>
This commit is contained in:
Peter Ujfalusi 2020-12-08 11:04:24 +02:00 committed by Vinod Koul
parent 1609c15a20
commit 426506a7e0
4 changed files with 25 additions and 0 deletions
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14
drivers/dma/ti/k3-udma-glue.c
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@ -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);

6
drivers/dma/ti/k3-udma-private.c
View File

@ -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;

1
drivers/dma/ti/k3-udma.h
View File

@ -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);

4
include/linux/dma/k3-udma-glue.h
View File

@ -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_ */