The CPSW3G instance of CPSW on AM62AX 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 AM62AX 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 <[email protected]> --- This patch is based on commit 3cdd19089f1 Merge tag 'mmc-for-2026.07-rc2' of https://source.denx.de/u-boot/custodians/u-boot-mmc of the master branch of U-Boot. v1 of this patch is at: https://lore.kernel.org/r/[email protected]/ Changes since v1: - Rebased patch. board/ti/am62ax/rm-cfg.yaml | 108 +++++++++++++++++++++++++++---- board/ti/am62ax/tifs-rm-cfg.yaml | 94 +++++++++++++++++++++++---- 2 files changed, 179 insertions(+), 23 deletions(-) diff --git a/board/ti/am62ax/rm-cfg.yaml b/board/ti/am62ax/rm-cfg.yaml index 4e238883b96..36b0049f43a 100644 --- a/board/ti/am62ax/rm-cfg.yaml +++ b/board/ti/am62ax/rm-cfg.yaml @@ -244,7 +244,7 @@ rm-cfg: subhdr: magic: 0x7B25 size: 8 - resasg_entries_size: 1064 + resasg_entries_size: 1176 reserved: 0 resasg_entries: - @@ -705,13 +705,25 @@ 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 @@ -759,13 +771,25 @@ 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 @@ -825,13 +849,25 @@ 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 @@ -917,17 +953,29 @@ rm-cfg: start_resource: 19 num_resource: 1 type: 1963 - host_id: 30 + host_id: 36 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 @@ -1009,6 +1057,12 @@ rm-cfg: type: 12750 host_id: 12 reserved: 0 + - + start_resource: 0 + num_resource: 6 + type: 12750 + host_id: 36 + reserved: 0 - start_resource: 0 num_resource: 6 @@ -1017,16 +1071,46 @@ rm-cfg: reserved: 0 - start_resource: 0 - num_resource: 8 + num_resource: 6 + type: 12769 + host_id: 36 + reserved: 0 + - + start_resource: 0 + num_resource: 5 type: 12810 host_id: 12 reserved: 0 + - + start_resource: 5 + num_resource: 3 + type: 12810 + host_id: 35 + reserved: 0 + - + start_resource: 5 + num_resource: 3 + type: 12810 + host_id: 36 + reserved: 0 - start_resource: 12288 - num_resource: 128 + num_resource: 64 type: 12813 host_id: 12 reserved: 0 + - + start_resource: 12352 + num_resource: 64 + type: 12813 + host_id: 35 + reserved: 0 + - + start_resource: 12352 + num_resource: 64 + type: 12813 + host_id: 36 + reserved: 0 - start_resource: 3072 num_resource: 6 diff --git a/board/ti/am62ax/tifs-rm-cfg.yaml b/board/ti/am62ax/tifs-rm-cfg.yaml index 78bbab38bb6..3706fac8664 100644 --- a/board/ti/am62ax/tifs-rm-cfg.yaml +++ b/board/ti/am62ax/tifs-rm-cfg.yaml @@ -244,7 +244,7 @@ tifs-rm-cfg: subhdr: magic: 0x7B25 size: 8 - resasg_entries_size: 880 + resasg_entries_size: 976 reserved: 0 resasg_entries: - @@ -585,13 +585,25 @@ 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 @@ -639,13 +651,25 @@ 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 @@ -705,13 +729,25 @@ 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 @@ -797,17 +833,29 @@ tifs-rm-cfg: start_resource: 19 num_resource: 1 type: 1963 - host_id: 30 + host_id: 36 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 @@ -877,6 +925,12 @@ tifs-rm-cfg: type: 12750 host_id: 12 reserved: 0 + - + start_resource: 0 + num_resource: 6 + type: 12750 + host_id: 36 + reserved: 0 - start_resource: 0 num_resource: 6 @@ -885,10 +939,28 @@ tifs-rm-cfg: reserved: 0 - start_resource: 0 - num_resource: 8 + num_resource: 6 + type: 12769 + host_id: 36 + reserved: 0 + - + start_resource: 0 + num_resource: 5 type: 12810 host_id: 12 reserved: 0 + - + start_resource: 5 + num_resource: 3 + type: 12810 + host_id: 35 + reserved: 0 + - + start_resource: 5 + num_resource: 3 + type: 12810 + host_id: 36 + reserved: 0 - start_resource: 3072 num_resource: 6 -- 2.51.1
