[PATCH] board: ti: am62px: tifs-rm-cfg/rm-cfg: Update DMA resource sharing for CPSW
Siddharth Vadapalli
s-vadapalli at ti.com
Wed Feb 5 14:14:40 CET 2025
The CPSW3G instance of CPSW on AM62PX SoC provides Ethernet functionality.
Currently, Ethernet is supported on Linux which runs on the A53 core on the
SoC, by allocating all of the DMA resources associated with CPSW to A53_2.
In order to enable use-cases where the Ethernet traffic is sent from or
consumed by various CPU cores on the SoC simultaneously, while at the
same time, maintaining backward compatibility with the existing use-case
of A53 being the sole entity that exchanges traffic with CPSW via DMA,
update the DMA resource sharing scheme on AM62PX SoC to the following:
--------------- -------------- ------------- ----------------
Resource WKUP_R5 MCU_R5 A53_2
--------------- -------------- ------------- ----------------
TX Channels [8] => 4 (Primary) 4 (Primary) 8 (Secondary)
TX Rings [64] => 32 (Primary) 32 (Primary) 64 (Secondary)
RX Channels [1] => 1 (Primary) 0 1 (Secondary)
RX Flows [16] => 6 (Primary) 10 (Primary) 16 (Secondary)
In the absence of primary owners of resources (existing use-case
where A53 owns all of the CPSW DMA resources), the secondary owner
can claim all of the resources as its own. For shared use-cases,
the resources that are not claimed by the primary are communicated
to the secondary owner allowing it to claim them. This ensures that
Linux on A53_2 can continue claiming all DMA resources associated
with CPSW in the absence of primary owners, while at the same time
providing users the flexibility to share CPSW DMA resources across
various CPU cores listed above if needed.
While Linux has been mentioned as the Operating System running
on A53, there is no dependency between the Operating System
running on A53 and its ability to claim the CPSW DMA resources
listed above.
Signed-off-by: Siddharth Vadapalli <s-vadapalli at ti.com>
---
Hello,
This patch is based on commit
d6da3dbaef Merge patch series "cmd: Add support for optee commands."
of the next branch of U-Boot.
Patch has been tested on AM62PX SoC running Linux, ensuring that the
changes made by this patch don't break backwards compatibility i.e.
Linux can continue claiming all of the CPSW DMA Resources in the absence
of primary owners.
Regards,
Siddharth.
board/ti/am62px/rm-cfg.yaml | 82 +++++++++++++++++++++++++-------
board/ti/am62px/tifs-rm-cfg.yaml | 72 +++++++++++++++++++++++-----
2 files changed, 125 insertions(+), 29 deletions(-)
diff --git a/board/ti/am62px/rm-cfg.yaml b/board/ti/am62px/rm-cfg.yaml
index caa2f7a5a8..dc445a4b72 100644
--- a/board/ti/am62px/rm-cfg.yaml
+++ b/board/ti/am62px/rm-cfg.yaml
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0+
-# Copyright (C) 2022-2023 Texas Instruments Incorporated - https://www.ti.com/
+# Copyright (C) 2022-2025 Texas Instruments Incorporated - https://www.ti.com/
#
# Resource management configuration for AM62P
#
@@ -244,7 +244,7 @@ rm-cfg:
subhdr:
magic: 0x7B25
size: 8
- resasg_entries_size: 984
+ resasg_entries_size: 1048
reserved: 0
resasg_entries:
-
@@ -476,13 +476,13 @@ rm-cfg:
host_id: 12
reserved: 0
-
- start_resource: 45
+ start_resource: 44
num_resource: 35
type: 1802
host_id: 35
reserved: 0
-
- start_resource: 45
+ start_resource: 44
num_resource: 35
type: 1802
host_id: 36
@@ -494,31 +494,31 @@ rm-cfg:
host_id: 30
reserved: 0
-
- start_resource: 14
+ start_resource: 13
num_resource: 512
type: 1805
host_id: 12
reserved: 0
-
- start_resource: 526
+ start_resource: 525
num_resource: 256
type: 1805
host_id: 35
reserved: 0
-
- start_resource: 526
+ start_resource: 525
num_resource: 256
type: 1805
host_id: 36
reserved: 0
-
- start_resource: 782
+ start_resource: 781
num_resource: 128
type: 1805
host_id: 30
reserved: 0
-
- start_resource: 910
+ start_resource: 909
num_resource: 626
type: 1805
host_id: 128
@@ -645,16 +645,28 @@ rm-cfg:
reserved: 0
-
start_resource: 19
- num_resource: 64
+ num_resource: 32
type: 1937
host_id: 12
reserved: 0
-
start_resource: 19
- num_resource: 64
+ num_resource: 32
type: 1937
host_id: 36
reserved: 0
+ -
+ start_resource: 51
+ num_resource: 32
+ type: 1937
+ host_id: 12
+ reserved: 0
+ -
+ start_resource: 51
+ num_resource: 32
+ type: 1937
+ host_id: 30
+ reserved: 0
-
start_resource: 83
num_resource: 8
@@ -699,16 +711,28 @@ rm-cfg:
reserved: 0
-
start_resource: 118
- num_resource: 16
+ num_resource: 6
type: 1943
host_id: 12
reserved: 0
-
start_resource: 118
- num_resource: 16
+ num_resource: 6
type: 1943
host_id: 36
reserved: 0
+ -
+ start_resource: 124
+ num_resource: 10
+ type: 1943
+ host_id: 12
+ reserved: 0
+ -
+ start_resource: 124
+ num_resource: 10
+ type: 1943
+ host_id: 30
+ reserved: 0
-
start_resource: 134
num_resource: 8
@@ -765,16 +789,28 @@ rm-cfg:
reserved: 0
-
start_resource: 19
- num_resource: 8
+ num_resource: 4
type: 1956
host_id: 12
reserved: 0
-
start_resource: 19
- num_resource: 8
+ num_resource: 4
type: 1956
host_id: 36
reserved: 0
+ -
+ start_resource: 23
+ num_resource: 4
+ type: 1956
+ host_id: 12
+ reserved: 0
+ -
+ start_resource: 23
+ num_resource: 4
+ type: 1956
+ host_id: 30
+ reserved: 0
-
start_resource: 27
num_resource: 1
@@ -861,16 +897,28 @@ rm-cfg:
reserved: 0
-
start_resource: 19
- num_resource: 16
+ num_resource: 6
type: 1964
host_id: 12
reserved: 0
-
start_resource: 19
- num_resource: 16
+ num_resource: 6
type: 1964
host_id: 36
reserved: 0
+ -
+ start_resource: 25
+ num_resource: 10
+ type: 1964
+ host_id: 12
+ reserved: 0
+ -
+ start_resource: 25
+ num_resource: 10
+ type: 1964
+ host_id: 30
+ reserved: 0
-
start_resource: 20
num_resource: 1
diff --git a/board/ti/am62px/tifs-rm-cfg.yaml b/board/ti/am62px/tifs-rm-cfg.yaml
index a80a275046..8026974805 100644
--- a/board/ti/am62px/tifs-rm-cfg.yaml
+++ b/board/ti/am62px/tifs-rm-cfg.yaml
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0+
-# Copyright (C) 2022-2023 Texas Instruments Incorporated - https://www.ti.com/
+# Copyright (C) 2022-2025 Texas Instruments Incorporated - https://www.ti.com/
#
# Resource management configuration for AM62P
#
@@ -244,7 +244,7 @@ tifs-rm-cfg:
subhdr:
magic: 0x7B25
size: 8
- resasg_entries_size: 840
+ resasg_entries_size: 904
reserved: 0
resasg_entries:
-
@@ -423,13 +423,13 @@ tifs-rm-cfg:
reserved: 0
-
start_resource: 44
- num_resource: 36
+ num_resource: 35
type: 1802
host_id: 35
reserved: 0
-
start_resource: 44
- num_resource: 36
+ num_resource: 35
type: 1802
host_id: 36
reserved: 0
@@ -555,16 +555,28 @@ tifs-rm-cfg:
reserved: 0
-
start_resource: 19
- num_resource: 64
+ num_resource: 32
type: 1937
host_id: 12
reserved: 0
-
start_resource: 19
- num_resource: 64
+ num_resource: 32
type: 1937
host_id: 36
reserved: 0
+ -
+ start_resource: 51
+ num_resource: 32
+ type: 1937
+ host_id: 12
+ reserved: 0
+ -
+ start_resource: 51
+ num_resource: 32
+ type: 1937
+ host_id: 30
+ reserved: 0
-
start_resource: 83
num_resource: 8
@@ -609,16 +621,28 @@ tifs-rm-cfg:
reserved: 0
-
start_resource: 118
- num_resource: 16
+ num_resource: 6
type: 1943
host_id: 12
reserved: 0
-
start_resource: 118
- num_resource: 16
+ num_resource: 6
type: 1943
host_id: 36
reserved: 0
+ -
+ start_resource: 124
+ num_resource: 10
+ type: 1943
+ host_id: 12
+ reserved: 0
+ -
+ start_resource: 124
+ num_resource: 10
+ type: 1943
+ host_id: 30
+ reserved: 0
-
start_resource: 134
num_resource: 8
@@ -675,16 +699,28 @@ tifs-rm-cfg:
reserved: 0
-
start_resource: 19
- num_resource: 8
+ num_resource: 4
type: 1956
host_id: 12
reserved: 0
-
start_resource: 19
- num_resource: 8
+ num_resource: 4
type: 1956
host_id: 36
reserved: 0
+ -
+ start_resource: 23
+ num_resource: 4
+ type: 1956
+ host_id: 12
+ reserved: 0
+ -
+ start_resource: 23
+ num_resource: 4
+ type: 1956
+ host_id: 30
+ reserved: 0
-
start_resource: 27
num_resource: 1
@@ -771,16 +807,28 @@ tifs-rm-cfg:
reserved: 0
-
start_resource: 19
- num_resource: 16
+ num_resource: 6
type: 1964
host_id: 12
reserved: 0
-
start_resource: 19
- num_resource: 16
+ num_resource: 6
type: 1964
host_id: 36
reserved: 0
+ -
+ start_resource: 25
+ num_resource: 10
+ type: 1964
+ host_id: 12
+ reserved: 0
+ -
+ start_resource: 25
+ num_resource: 10
+ type: 1964
+ host_id: 30
+ reserved: 0
-
start_resource: 20
num_resource: 1
--
2.43.0
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