Re: [PATCH v4 07/15] dmaengine: ti: k3 PSI-L remote endpoint configuration

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On 01/11/2019 10:41, Peter Ujfalusi wrote:

In K3 architecture the DMA operates within threads. One end of the thread
is UDMAP, the other is on the peripheral side.

The UDMAP channel configuration depends on the needs of the remote
endpoint and it can be differ from peripheral to peripheral.

This patch adds database for am654 and j721e and small API to fetch the
PSI-L endpoint configuration from the database which should only used by
the DMA driver(s).

Another API is added for native peripherals to give possibility to pass new
configuration for the threads they are using, which is needed to be able to
handle changes caused by different firmware loaded for the peripheral for
example.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
---
  drivers/dma/ti/Kconfig         |   3 +
  drivers/dma/ti/Makefile        |   1 +
  drivers/dma/ti/k3-psil-am654.c | 172 ++++++++++++++++++++++++++
  drivers/dma/ti/k3-psil-j721e.c | 219 +++++++++++++++++++++++++++++++++
  drivers/dma/ti/k3-psil-priv.h  |  39 ++++++
  drivers/dma/ti/k3-psil.c       |  97 +++++++++++++++
  include/linux/dma/k3-psil.h    |  47 +++++++
  7 files changed, 578 insertions(+)
  create mode 100644 drivers/dma/ti/k3-psil-am654.c
  create mode 100644 drivers/dma/ti/k3-psil-j721e.c
  create mode 100644 drivers/dma/ti/k3-psil-priv.h
  create mode 100644 drivers/dma/ti/k3-psil.c
  create mode 100644 include/linux/dma/k3-psil.h

diff --git a/drivers/dma/ti/Kconfig b/drivers/dma/ti/Kconfig
index d507c24fbf31..72f3d2728178 100644
--- a/drivers/dma/ti/Kconfig
+++ b/drivers/dma/ti/Kconfig
@@ -34,5 +34,8 @@ config DMA_OMAP
  	  Enable support for the TI sDMA (System DMA or DMA4) controller. This
  	  DMA engine is found on OMAP and DRA7xx parts.
+config TI_K3_PSIL 
+	bool
+
  config TI_DMA_CROSSBAR
  	bool
diff --git a/drivers/dma/ti/Makefile b/drivers/dma/ti/Makefile
index 113e59ec9c32..f8d912ad7eaf 100644
--- a/drivers/dma/ti/Makefile
+++ b/drivers/dma/ti/Makefile
@@ -2,4 +2,5 @@
  obj-$(CONFIG_TI_CPPI41) += cppi41.o
  obj-$(CONFIG_TI_EDMA) += edma.o
  obj-$(CONFIG_DMA_OMAP) += omap-dma.o
+obj-$(CONFIG_TI_K3_PSIL) += k3-psil.o k3-psil-am654.o k3-psil-j721e.o
  obj-$(CONFIG_TI_DMA_CROSSBAR) += dma-crossbar.o
diff --git a/drivers/dma/ti/k3-psil-am654.c b/drivers/dma/ti/k3-psil-am654.c
new file mode 100644
index 000000000000..edd7fff36f44
--- /dev/null
+++ b/drivers/dma/ti/k3-psil-am654.c
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
+ *  Author: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
+ */
+
+#include <linux/kernel.h>
+
+#include "k3-psil-priv.h"
+
+#define PSIL_PDMA_XY_TR(x)				\
+	{						\
+		.thread_id = x,				\
+		.ep_config = {				\
+			.ep_type = PSIL_EP_PDMA_XY,	\
+		},					\
+	}
+
+#define PSIL_PDMA_XY_PKT(x)				\
+	{						\
+		.thread_id = x,				\
+		.ep_config = {				\
+			.ep_type = PSIL_EP_PDMA_XY,	\
+			.pkt_mode = 1,			\
+		},					\
+	}
+
+#define PSIL_ETHERNET(x)				\
+	{						\
+		.thread_id = x,				\
+		.ep_config = {				\
+			.ep_type = PSIL_EP_NATIVE,	\
+			.pkt_mode = 1,			\
+			.needs_epib = 1,		\
+			.psd_size = 16,			\
+		},					\
+	}
+
+#define PSIL_SA2UL(x, tx)				\
+	{						\
+		.thread_id = x,				\
+		.ep_config = {				\
+			.ep_type = PSIL_EP_NATIVE,	\
+			.pkt_mode = 1,			\
+			.needs_epib = 1,		\
+			.psd_size = 64,			\
+			.notdpkt = tx,			\
+		},					\
+	}
+
+/* PSI-L source thread IDs, used for RX (DMA_DEV_TO_MEM) */
+struct psil_ep am654_src_ep_map[] = {
+	/* SA2UL */
+	PSIL_SA2UL(0x4000, 0),
+	PSIL_SA2UL(0x4001, 0),
+	/* PRU_ICSSG0 */
+	PSIL_ETHERNET(0x4100),
+	PSIL_ETHERNET(0x4101),
+	PSIL_ETHERNET(0x4102),
+	PSIL_ETHERNET(0x4103),
+	/* PRU_ICSSG1 */
+	PSIL_ETHERNET(0x4200),
+	PSIL_ETHERNET(0x4201),
+	PSIL_ETHERNET(0x4202),
+	PSIL_ETHERNET(0x4203),
+	/* PRU_ICSSG2 */
+	PSIL_ETHERNET(0x4300),
+	PSIL_ETHERNET(0x4301),
+	PSIL_ETHERNET(0x4302),
+	PSIL_ETHERNET(0x4303),
+	/* PDMA0 - McASPs */
+	PSIL_PDMA_XY_TR(0x4400),
+	PSIL_PDMA_XY_TR(0x4401),
+	PSIL_PDMA_XY_TR(0x4402),
+	/* PDMA1 - SPI0-4 */
+	PSIL_PDMA_XY_PKT(0x4500),
+	PSIL_PDMA_XY_PKT(0x4501),
+	PSIL_PDMA_XY_PKT(0x4502),
+	PSIL_PDMA_XY_PKT(0x4503),
+	PSIL_PDMA_XY_PKT(0x4504),
+	PSIL_PDMA_XY_PKT(0x4505),
+	PSIL_PDMA_XY_PKT(0x4506),
+	PSIL_PDMA_XY_PKT(0x4507),
+	PSIL_PDMA_XY_PKT(0x4508),
+	PSIL_PDMA_XY_PKT(0x4509),
+	PSIL_PDMA_XY_PKT(0x450a),
+	PSIL_PDMA_XY_PKT(0x450b),
+	PSIL_PDMA_XY_PKT(0x450c),
+	PSIL_PDMA_XY_PKT(0x450d),
+	PSIL_PDMA_XY_PKT(0x450e),
+	PSIL_PDMA_XY_PKT(0x450f),
+	PSIL_PDMA_XY_PKT(0x4510),
+	PSIL_PDMA_XY_PKT(0x4511),
+	PSIL_PDMA_XY_PKT(0x4512),
+	PSIL_PDMA_XY_PKT(0x4513),
+	/* PDMA1 - USART0-2 */
+	PSIL_PDMA_XY_PKT(0x4514),
+	PSIL_PDMA_XY_PKT(0x4515),
+	PSIL_PDMA_XY_PKT(0x4516),
+	/* CPSW0 */
+	PSIL_ETHERNET(0x7000),
+	/* MCU_PDMA0 - ADCs */
+	PSIL_PDMA_XY_TR(0x7100),
+	PSIL_PDMA_XY_TR(0x7101),
+	PSIL_PDMA_XY_TR(0x7102),
+	PSIL_PDMA_XY_TR(0x7103),
+	/* MCU_PDMA1 - MCU_SPI0-2 */
+	PSIL_PDMA_XY_PKT(0x7200),
+	PSIL_PDMA_XY_PKT(0x7201),
+	PSIL_PDMA_XY_PKT(0x7202),
+	PSIL_PDMA_XY_PKT(0x7203),
+	PSIL_PDMA_XY_PKT(0x7204),
+	PSIL_PDMA_XY_PKT(0x7205),
+	PSIL_PDMA_XY_PKT(0x7206),
+	PSIL_PDMA_XY_PKT(0x7207),
+	PSIL_PDMA_XY_PKT(0x7208),
+	PSIL_PDMA_XY_PKT(0x7209),
+	PSIL_PDMA_XY_PKT(0x720a),
+	PSIL_PDMA_XY_PKT(0x720b),
+	/* MCU_PDMA1 - MCU_USART0 */
+	PSIL_PDMA_XY_PKT(0x7212),
+};
+
+/* PSI-L destination thread IDs, used for TX (DMA_MEM_TO_DEV) */
+struct psil_ep am654_dst_ep_map[] = {
+	/* SA2UL */
+	PSIL_SA2UL(0xc000, 1),
+	/* PRU_ICSSG0 */
+	PSIL_ETHERNET(0xc100),
+	PSIL_ETHERNET(0xc101),
+	PSIL_ETHERNET(0xc102),
+	PSIL_ETHERNET(0xc103),
+	PSIL_ETHERNET(0xc104),
+	PSIL_ETHERNET(0xc105),
+	PSIL_ETHERNET(0xc106),
+	PSIL_ETHERNET(0xc107),
+	/* PRU_ICSSG1 */
+	PSIL_ETHERNET(0xc200),
+	PSIL_ETHERNET(0xc201),
+	PSIL_ETHERNET(0xc202),
+	PSIL_ETHERNET(0xc203),
+	PSIL_ETHERNET(0xc204),
+	PSIL_ETHERNET(0xc205),
+	PSIL_ETHERNET(0xc206),
+	PSIL_ETHERNET(0xc207),
+	/* PRU_ICSSG2 */
+	PSIL_ETHERNET(0xc300),
+	PSIL_ETHERNET(0xc301),
+	PSIL_ETHERNET(0xc302),
+	PSIL_ETHERNET(0xc303),
+	PSIL_ETHERNET(0xc304),
+	PSIL_ETHERNET(0xc305),
+	PSIL_ETHERNET(0xc306),
+	PSIL_ETHERNET(0xc307),
+	/* CPSW0 */
+	PSIL_ETHERNET(0xf000),
+	PSIL_ETHERNET(0xf001),
+	PSIL_ETHERNET(0xf002),
+	PSIL_ETHERNET(0xf003),
+	PSIL_ETHERNET(0xf004),
+	PSIL_ETHERNET(0xf005),
+	PSIL_ETHERNET(0xf006),
+	PSIL_ETHERNET(0xf007),
+};
+
+struct psil_ep_map am654_ep_map = {
+	.name = "am654",
+	.src = am654_src_ep_map,
+	.src_count = ARRAY_SIZE(am654_src_ep_map),
+	.dst = am654_dst_ep_map,
+	.dst_count = ARRAY_SIZE(am654_dst_ep_map),
+};
diff --git a/drivers/dma/ti/k3-psil-j721e.c b/drivers/dma/ti/k3-psil-j721e.c
new file mode 100644
index 000000000000..86e1ff57e197
--- /dev/null
+++ b/drivers/dma/ti/k3-psil-j721e.c
@@ -0,0 +1,219 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
+ *  Author: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
+ */
+
+#include <linux/kernel.h>
+
+#include "k3-psil-priv.h"
+
+#define PSIL_PDMA_XY_TR(x)				\
+	{						\
+		.thread_id = x,				\
+		.ep_config = {				\
+			.ep_type = PSIL_EP_PDMA_XY,	\
+		},					\
+	}
+
+#define PSIL_PDMA_XY_PKT(x)				\
+	{						\
+		.thread_id = x,				\
+		.ep_config = {				\
+			.ep_type = PSIL_EP_PDMA_XY,	\
+			.pkt_mode = 1,			\
+		},					\
+	}
+
+#define PSIL_PDMA_MCASP(x)				\
+	{						\
+		.thread_id = x,				\
+		.ep_config = {				\
+			.ep_type = PSIL_EP_PDMA_XY,	\
+			.pdma_acc32 = 1,		\
+			.pdma_burst = 1,		\
+		},					\
+	}
+
+#define PSIL_ETHERNET(x)				\
+	{						\
+		.thread_id = x,				\
+		.ep_config = {				\
+			.ep_type = PSIL_EP_NATIVE,	\
+			.pkt_mode = 1,			\
+			.needs_epib = 1,		\
+			.psd_size = 16,			\
+		},					\
+	}
+
+#define PSIL_SA2UL(x, tx)				\
+	{						\
+		.thread_id = x,				\
+		.ep_config = {				\
+			.ep_type = PSIL_EP_NATIVE,	\
+			.pkt_mode = 1,			\
+			.needs_epib = 1,		\
+			.psd_size = 64,			\
+			.notdpkt = tx,			\
+		},					\
+	}
+
+/* PSI-L source thread IDs, used for RX (DMA_DEV_TO_MEM) */
+struct psil_ep j721e_src_ep_map[] = {
+	/* SA2UL */
+	PSIL_SA2UL(0x4000, 0),
+	PSIL_SA2UL(0x4001, 0),
+	/* PRU_ICSSG0 */
+	PSIL_ETHERNET(0x4100),
+	PSIL_ETHERNET(0x4101),
+	PSIL_ETHERNET(0x4102),
+	PSIL_ETHERNET(0x4103),
+	/* PRU_ICSSG1 */
+	PSIL_ETHERNET(0x4200),
+	PSIL_ETHERNET(0x4201),
+	PSIL_ETHERNET(0x4202),
+	PSIL_ETHERNET(0x4203),
+	/* PDMA6 (PSIL_PDMA_MCASP_G0) - McASP0-2 */
+	PSIL_PDMA_MCASP(0x4400),
+	PSIL_PDMA_MCASP(0x4401),
+	PSIL_PDMA_MCASP(0x4402),
+	/* PDMA7 (PSIL_PDMA_MCASP_G1) - McASP3-11 */
+	PSIL_PDMA_MCASP(0x4500),
+	PSIL_PDMA_MCASP(0x4501),
+	PSIL_PDMA_MCASP(0x4502),
+	PSIL_PDMA_MCASP(0x4503),
+	PSIL_PDMA_MCASP(0x4504),
+	PSIL_PDMA_MCASP(0x4505),
+	PSIL_PDMA_MCASP(0x4506),
+	PSIL_PDMA_MCASP(0x4507),
+	PSIL_PDMA_MCASP(0x4508),
+	/* PDMA8 (PDMA_MISC_G0) - SPI0-1 */
+	PSIL_PDMA_XY_PKT(0x4600),
+	PSIL_PDMA_XY_PKT(0x4601),
+	PSIL_PDMA_XY_PKT(0x4602),
+	PSIL_PDMA_XY_PKT(0x4603),
+	PSIL_PDMA_XY_PKT(0x4604),
+	PSIL_PDMA_XY_PKT(0x4605),
+	PSIL_PDMA_XY_PKT(0x4606),
+	PSIL_PDMA_XY_PKT(0x4607),
+	/* PDMA9 (PDMA_MISC_G1) - SPI2-3 */
+	PSIL_PDMA_XY_PKT(0x460c),
+	PSIL_PDMA_XY_PKT(0x460d),
+	PSIL_PDMA_XY_PKT(0x460e),
+	PSIL_PDMA_XY_PKT(0x460f),
+	PSIL_PDMA_XY_PKT(0x4610),
+	PSIL_PDMA_XY_PKT(0x4611),
+	PSIL_PDMA_XY_PKT(0x4612),
+	PSIL_PDMA_XY_PKT(0x4613),
+	/* PDMA10 (PDMA_MISC_G2) - SPI4-5 */
+	PSIL_PDMA_XY_PKT(0x4618),
+	PSIL_PDMA_XY_PKT(0x4619),
+	PSIL_PDMA_XY_PKT(0x461a),
+	PSIL_PDMA_XY_PKT(0x461b),
+	PSIL_PDMA_XY_PKT(0x461c),
+	PSIL_PDMA_XY_PKT(0x461d),
+	PSIL_PDMA_XY_PKT(0x461e),
+	PSIL_PDMA_XY_PKT(0x461f),
+	/* PDMA11 (PDMA_MISC_G3) */
+	PSIL_PDMA_XY_PKT(0x4624),
+	PSIL_PDMA_XY_PKT(0x4625),
+	PSIL_PDMA_XY_PKT(0x4626),
+	PSIL_PDMA_XY_PKT(0x4627),
+	PSIL_PDMA_XY_PKT(0x4628),
+	PSIL_PDMA_XY_PKT(0x4629),
+	PSIL_PDMA_XY_PKT(0x4630),
+	PSIL_PDMA_XY_PKT(0x463a),
+	/* PDMA13 (PDMA_USART_G0) - UART0-1 */
+	PSIL_PDMA_XY_PKT(0x4700),
+	PSIL_PDMA_XY_PKT(0x4701),
+	/* PDMA14 (PDMA_USART_G1) - UART2-3 */
+	PSIL_PDMA_XY_PKT(0x4702),
+	PSIL_PDMA_XY_PKT(0x4703),
+	/* PDMA15 (PDMA_USART_G2) - UART4-9 */
+	PSIL_PDMA_XY_PKT(0x4704),
+	PSIL_PDMA_XY_PKT(0x4705),
+	PSIL_PDMA_XY_PKT(0x4706),
+	PSIL_PDMA_XY_PKT(0x4707),
+	PSIL_PDMA_XY_PKT(0x4708),
+	PSIL_PDMA_XY_PKT(0x4709),
+	/* CPSW9 */
+	PSIL_ETHERNET(0x4a00),
+	/* CPSW0 */
+	PSIL_ETHERNET(0x7000),
+	/* MCU_PDMA0 (MCU_PDMA_MISC_G0) - SPI0 */
+	PSIL_PDMA_XY_PKT(0x7100),
+	PSIL_PDMA_XY_PKT(0x7101),
+	PSIL_PDMA_XY_PKT(0x7102),
+	PSIL_PDMA_XY_PKT(0x7103),
+	/* MCU_PDMA1 (MCU_PDMA_MISC_G1) - SPI1-2 */
+	PSIL_PDMA_XY_PKT(0x7200),
+	PSIL_PDMA_XY_PKT(0x7201),
+	PSIL_PDMA_XY_PKT(0x7202),
+	PSIL_PDMA_XY_PKT(0x7203),
+	PSIL_PDMA_XY_PKT(0x7204),
+	PSIL_PDMA_XY_PKT(0x7205),
+	PSIL_PDMA_XY_PKT(0x7206),
+	PSIL_PDMA_XY_PKT(0x7207),
+	/* MCU_PDMA2 (MCU_PDMA_MISC_G2) - UART0 */
+	PSIL_PDMA_XY_PKT(0x7300),
+	/* MCU_PDMA_ADC - ADC0-1 */
+	PSIL_PDMA_XY_TR(0x7400),
+	PSIL_PDMA_XY_TR(0x7401),
+	PSIL_PDMA_XY_TR(0x7402),
+	PSIL_PDMA_XY_TR(0x7403),
+	/* SA2UL */
+	PSIL_SA2UL(0x7500, 0),
+	PSIL_SA2UL(0x7501, 0),
+};
+
+/* PSI-L destination thread IDs, used for TX (DMA_MEM_TO_DEV) */
+struct psil_ep j721e_dst_ep_map[] = {
+	/* SA2UL */
+	PSIL_SA2UL(0xc000, 1),
+	/* PRU_ICSSG0 */
+	PSIL_ETHERNET(0xc100),
+	PSIL_ETHERNET(0xc101),
+	PSIL_ETHERNET(0xc102),
+	PSIL_ETHERNET(0xc103),
+	PSIL_ETHERNET(0xc104),
+	PSIL_ETHERNET(0xc105),
+	PSIL_ETHERNET(0xc106),
+	PSIL_ETHERNET(0xc107),
+	/* PRU_ICSSG1 */
+	PSIL_ETHERNET(0xc200),
+	PSIL_ETHERNET(0xc201),
+	PSIL_ETHERNET(0xc202),
+	PSIL_ETHERNET(0xc203),
+	PSIL_ETHERNET(0xc204),
+	PSIL_ETHERNET(0xc205),
+	PSIL_ETHERNET(0xc206),
+	PSIL_ETHERNET(0xc207),
+	/* CPSW9 */
+	PSIL_ETHERNET(0xca00),
+	PSIL_ETHERNET(0xca01),
+	PSIL_ETHERNET(0xca02),
+	PSIL_ETHERNET(0xca03),
+	PSIL_ETHERNET(0xca04),
+	PSIL_ETHERNET(0xca05),
+	PSIL_ETHERNET(0xca06),
+	PSIL_ETHERNET(0xca07),
+	/* CPSW0 */
+	PSIL_ETHERNET(0xf000),
+	PSIL_ETHERNET(0xf001),
+	PSIL_ETHERNET(0xf002),
+	PSIL_ETHERNET(0xf003),
+	PSIL_ETHERNET(0xf004),
+	PSIL_ETHERNET(0xf005),
+	PSIL_ETHERNET(0xf006),
+	PSIL_ETHERNET(0xf007),
+	/* SA2UL */
+	PSIL_SA2UL(0xf500, 1),
+};
+
+struct psil_ep_map j721e_ep_map = {
+	.name = "j721e",
+	.src = j721e_src_ep_map,
+	.src_count = ARRAY_SIZE(j721e_src_ep_map),
+	.dst = j721e_dst_ep_map,
+	.dst_count = ARRAY_SIZE(j721e_dst_ep_map),
+};
diff --git a/drivers/dma/ti/k3-psil-priv.h b/drivers/dma/ti/k3-psil-priv.h
new file mode 100644
index 000000000000..f74420653d8a
--- /dev/null
+++ b/drivers/dma/ti/k3-psil-priv.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
+ */
+
+#ifndef K3_PSIL_PRIV_H_
+#define K3_PSIL_PRIV_H_
+
+#include <linux/dma/k3-psil.h>
+
+struct psil_ep {
+	u32 thread_id;
+	struct psil_endpoint_config ep_config;
+};
+
+/**
+ * struct psil_ep_map - PSI-L thread ID configuration maps
+ * @name:	Name of the map, set it to the name of the SoC
+ * @src:	Array of source PSI-L thread configurations
+ * @src_count:	Number of entries in the src array
+ * @dst:	Array of destination PSI-L thread configurations
+ * @dst_count:	Number of entries in the dst array
+ *
+ * In case of symmetric configuration for a matching src/dst thread (for example
+ * 0x4400 and 0xc400) only the src configuration can be present. If no dst
+ * configuration found the code will look for (dst_thread_id & ~0x8000) to find
+ * the symmetric match.
+ */
+struct psil_ep_map {
+	char *name;
+	struct psil_ep	*src;
+	int src_count;
+	struct psil_ep	*dst;
+	int dst_count;
+};
+
+struct psil_endpoint_config *psil_get_ep_config(u32 thread_id);
+
+#endif /* K3_PSIL_PRIV_H_ */
diff --git a/drivers/dma/ti/k3-psil.c b/drivers/dma/ti/k3-psil.c
new file mode 100644
index 000000000000..e610022f09f4
--- /dev/null
+++ b/drivers/dma/ti/k3-psil.c
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
+ *  Author: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+
+#include "k3-psil-priv.h"
+
+extern struct psil_ep_map am654_ep_map;
+extern struct psil_ep_map j721e_ep_map;
+
+static DEFINE_MUTEX(ep_map_mutex);
+static struct psil_ep_map *soc_ep_map;
So, you are only protecting the high level soc_ep_map pointer only. You don't need to protect the database itself via some usecounting or something, or are you doing it within the DMA driver? 

-Tero


+
+struct psil_endpoint_config *psil_get_ep_config(u32 thread_id)
+{
+	int i;
+
+	mutex_lock(&ep_map_mutex);
+	if (!soc_ep_map) {
+		if (of_machine_is_compatible("ti,am654")) {
+			soc_ep_map = &am654_ep_map;
+		} else if (of_machine_is_compatible("ti,j721e")) {
+			soc_ep_map = &j721e_ep_map;
+		} else {
+			pr_err("PSIL: No compatible machine found for map\n");
+			return ERR_PTR(-ENOTSUPP);
+		}
+		pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name);
+	}
+	mutex_unlock(&ep_map_mutex);
+
+	if (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET && soc_ep_map->dst) {
+		/* check in destination thread map */
+		for (i = 0; i < soc_ep_map->dst_count; i++) {
+			if (soc_ep_map->dst[i].thread_id == thread_id)
+				return &soc_ep_map->dst[i].ep_config;
+		}
+	}
+
+	thread_id &= ~K3_PSIL_DST_THREAD_ID_OFFSET;
+	if (soc_ep_map->src) {
+		for (i = 0; i < soc_ep_map->src_count; i++) {
+			if (soc_ep_map->src[i].thread_id == thread_id)
+				return &soc_ep_map->src[i].ep_config;
+		}
+	}
+
+	return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(psil_get_ep_config);
+
+int psil_set_new_ep_config(struct device *dev, const char *name,
+			   struct psil_endpoint_config *ep_config)
+{
+	struct psil_endpoint_config *dst_ep_config;
+	struct of_phandle_args dma_spec;
+	u32 thread_id;
+	int index;
+
+	if (!dev || !dev->of_node)
+		return -EINVAL;
+
+	index = of_property_match_string(dev->of_node, "dma-names", name);
+	if (index < 0)
+		return index;
+
+	if (of_parse_phandle_with_args(dev->of_node, "dmas", "#dma-cells",
+				       index, &dma_spec))
+		return -ENOENT;
+
+	thread_id = dma_spec.args[0];
+
+	dst_ep_config = psil_get_ep_config(thread_id);
+	if (IS_ERR(dst_ep_config)) {
+		pr_err("PSIL: thread ID 0x%04x not defined in map\n",
+		       thread_id);
+		of_node_put(dma_spec.np);
+		return PTR_ERR(dst_ep_config);
+	}
+
+	memcpy(dst_ep_config, ep_config, sizeof(*dst_ep_config));
+
+	of_node_put(dma_spec.np);
+	return 0;
+}
+EXPORT_SYMBOL(psil_set_new_ep_config);
+
+MODULE_DESCRIPTION("TI K3 PSI-L endpoint database");
+MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@xxxxxx>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/dma/k3-psil.h b/include/linux/dma/k3-psil.h
new file mode 100644
index 000000000000..16e9c8c6f839
--- /dev/null
+++ b/include/linux/dma/k3-psil.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
+ */
+
+#ifndef K3_PSIL_H_
+#define K3_PSIL_H_
+
+#include <linux/types.h>
+
+#define K3_PSIL_DST_THREAD_ID_OFFSET 0x8000
+
+struct device;
+
+/* Channel Throughput Levels */
+enum udma_tp_level {
+	UDMA_TP_NORMAL = 0,
+	UDMA_TP_HIGH = 1,
+	UDMA_TP_ULTRAHIGH = 2,
+	UDMA_TP_LAST,
+};
+
+enum psil_endpoint_type {
+	PSIL_EP_NATIVE = 0,
+	PSIL_EP_PDMA_XY,
+	PSIL_EP_PDMA_MCAN,
+	PSIL_EP_PDMA_AASRC,
+};
+
+struct psil_endpoint_config {
+	enum psil_endpoint_type ep_type;
+
+	unsigned pkt_mode:1;
+	unsigned notdpkt:1;
+	unsigned needs_epib:1;
+	u32 psd_size;
+	enum udma_tp_level channel_tpl;
+
+	/* PDMA properties, valid for PSIL_EP_PDMA_* */
+	unsigned pdma_acc32:1;
+	unsigned pdma_burst:1;
+};
+
+int psil_set_new_ep_config(struct device *dev, const char *name,
+			   struct psil_endpoint_config *ep_config);
+
+#endif /* K3_PSIL_H_ */



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