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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2019-12-23 14:04:48 +0300
committerVinod Koul <vkoul@kernel.org>2020-01-21 08:36:12 +0300
commit8c6bb62f6b4a24c446511e8f894251946dcc2ef1 (patch)
tree6838a7e4da29c912d7433c2080c186e4fcaa1788 /include/linux/dma
parent69bafc318560d02dc07e3b52af0d7cf5fc036bfe (diff)
downloadlinux-8c6bb62f6b4a24c446511e8f894251946dcc2ef1.tar.xz
dmaengine: ti: k3 PSI-L remote endpoint configuration
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@ti.com> Tested-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com> Link: https://lore.kernel.org/r/20191223110458.30766-9-peter.ujfalusi@ti.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'include/linux/dma')
-rw-r--r--include/linux/dma/k3-psil.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/include/linux/dma/k3-psil.h b/include/linux/dma/k3-psil.h
new file mode 100644
index 000000000000..61d5cc0ad601
--- /dev/null
+++ b/include/linux/dma/k3-psil.h
@@ -0,0 +1,71 @@
+/* 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;
+
+/**
+ * enum udma_tp_level - Channel Throughput Levels
+ * @UDMA_TP_NORMAL: Normal channel
+ * @UDMA_TP_HIGH: High Throughput channel
+ * @UDMA_TP_ULTRAHIGH: Ultra High Throughput channel
+ */
+enum udma_tp_level {
+ UDMA_TP_NORMAL = 0,
+ UDMA_TP_HIGH,
+ UDMA_TP_ULTRAHIGH,
+ UDMA_TP_LAST,
+};
+
+/**
+ * enum psil_endpoint_type - PSI-L Endpoint type
+ * @PSIL_EP_NATIVE: Normal channel
+ * @PSIL_EP_PDMA_XY: XY mode PDMA
+ * @PSIL_EP_PDMA_MCAN: MCAN mode PDMA
+ * @PSIL_EP_PDMA_AASRC: AASRC mode PDMA
+ */
+enum psil_endpoint_type {
+ PSIL_EP_NATIVE = 0,
+ PSIL_EP_PDMA_XY,
+ PSIL_EP_PDMA_MCAN,
+ PSIL_EP_PDMA_AASRC,
+};
+
+/**
+ * struct psil_endpoint_config - PSI-L Endpoint configuration
+ * @ep_type: PSI-L endpoint type
+ * @pkt_mode: If set, the channel must be in Packet mode, otherwise in
+ * TR mode
+ * @notdpkt: TDCM must be suppressed on the TX channel
+ * @needs_epib: Endpoint needs EPIB
+ * @psd_size: If set, PSdata is used by the endpoint
+ * @channel_tpl: Desired throughput level for the channel
+ * @pdma_acc32: ACC32 must be enabled on the PDMA side
+ * @pdma_burst: BURST must be enabled on the PDMA side
+ */
+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_ */