linux-kernel - Re: [PATCH v11 0/4] add zynqmp TCM bindings

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Message-ID: <0ceb2ba5-b595-483c-8a4a-2b64352871ed@amd.com>
Date: Mon, 19 Feb 2024 11:55:05 -0600
From: Tanmay Shah <tanmay.shah@....com>
To: andersson@...nel.org, mathieu.poirier@...aro.org, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 michal.simek@....com, ben.levinsky@....com
Cc: linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v11 0/4] add zynqmp TCM bindings

Hello,

By mistake same set of patches were sent twice in same git send-email command.

Anyone can be reviewed. Please let me know if I need to take any action to fix it.

Thanks.

On 2/19/24 11:44 AM, Tanmay Shah wrote:
> Tightly-Coupled Memories(TCMs) are low-latency memory that provides
> predictable instruction execution and predictable data load/store
> timing. Each Cortex-R5F processor contains exclusive two 64 KB memory
> banks on the ATCM and BTCM ports, for a total of 128 KB of memory.
> In lockstep mode, both 128KB memory is accessible to the cluster.
>
> As per ZynqMP Ultrascale+ Technical Reference Manual UG1085, following
> is address space of TCM memory. The bindings in this patch series
> introduces properties to accommodate following address space with
> address translation between Linux and Cortex-R5 views.
>
> |     |     |     |
> | --- | --- | --- |
> |      *Mode*        |   *R5 View* | *Linux view* |  Notes               |
> | *Split Mode*       | *start addr*| *start addr* |                      |
> | R5_0 ATCM (64 KB)  | 0x0000_0000 | 0xFFE0_0000  |                      |
> | R5_0 BTCM (64 KB)  | 0x0002_0000 | 0xFFE2_0000  |                      |
> | R5_1 ATCM (64 KB)  | 0x0000_0000 | 0xFFE9_0000  | alias of 0xFFE1_0000 |
> | R5_1 BTCM (64 KB)  | 0x0002_0000 | 0xFFEB_0000  | alias of 0xFFE3_0000 |
> |  ___               |     ___     |    ___       |                      |
> | *Lockstep Mode*    |             |              |                      |
> | R5_0 ATCM (128 KB) | 0x0000_0000 | 0xFFE0_0000  |                      |
> | R5_0 BTCM (128 KB) | 0x0002_0000 | 0xFFE2_0000  |                      |
>
> References:
> UG1085 TCM address space:
> https://docs.xilinx.com/r/en-US/ug1085-zynq-ultrascale-trm/Tightly-Coupled-Memory-Address-Map
>
> Changes in v11:
>   - Fix yamllint warning and reduce indentation as needed
>   - Remove redundant initialization of the variable
>   - Return correct error code if memory allocation failed
>
> Changs in v10:
>   - Add new patch (1/4) to series that changes hardcode TCM addresses in
>     lockstep mode and removes separate handling of TCM in lockstep and
>     split mode
>   - modify number of "reg", "reg-names" and "power-domains" entries
>     based on cluster mode
>   - Add extra optional atcm and btcm in "reg" property for lockstep mode
>   - Add "reg-names" for extra optional atcm and btcm for lockstep mode
>   - Drop previous Ack as bindings has new change
>   - Add individual tcm regions via "reg" and "reg-names" for lockstep mode
>   - Add each tcm's power-domains in lockstep mode
>   - Drop previous Ack as new change in dts patchset
>   - Remove redundant changes in driver to handle TCM in lockstep mode
>
> Changes in v9:
>   - Fix rproc lockstep dts
>   - Introduce new API to request and release core1 TCM power-domains in
>     lockstep mode. This will be used during prepare -> add_tcm_banks
>     callback to enable TCM in lockstep mode.
>   - Parse TCM from device-tree in lockstep mode and split mode in
>     uniform way.
>   - Fix TCM representation in device-tree in lockstep mode.
>   - Fix comments as suggested
>
> Changes in v8:
>   - Remove use of pm_domains framework
>   - Remove checking of pm_domain_id validation to power on/off tcm
>   - Remove spurious change
>   - parse power-domains property from device-tree and use EEMI calls
>     to power on/off TCM instead of using pm domains framework
>
> Changes in v7:
>   - %s/pm_dev1/pm_dev_core0/r
>   - %s/pm_dev_link1/pm_dev_core0_link/r
>   - %s/pm_dev2/pm_dev_core1/r
>   - %s/pm_dev_link2/pm_dev_core1_link/r
>   - remove pm_domain_id check to move next patch
>   - add comment about how 1st entry in pm domain list is used
>   - fix loop when jump to fail_add_pm_domains loop
>   - move checking of pm_domain_id from previous patch
>   - fix mem_bank_data memory allocation
>
> Changes in v6:
>   - Introduce new node entry for r5f cluster split mode dts and
>     keep it disabled by default.
>   - Keep remoteproc lockstep mode enabled by default to maintian
>     back compatibility.
>   - Enable split mode only for zcu102 board to demo split mode use
>   - Remove spurious change
>   - Handle errors in add_pm_domains function
>   - Remove redundant code to handle errors from remove_pm_domains
>   - Missing . at the end of the commit message
>   - remove redundant initialization of variables
>   - remove fail_tcm label and relevant code to free memory
>     acquired using devm_* API. As this will be freed when device free it
>   - add extra check to see if "reg" property is supported or not
>
> Changes in v5:
>   - maintain Rob's Ack on bindings patch as no changes in bindings
>   - split previous patch into multiple patches
>   - Use pm domain framework to turn on/off TCM
>   - Add support of parsing TCM information from device-tree
>   - maintain backward compatibility with previous bindings without
>     TCM information available in device-tree
>
> This patch series continues previous effort to upstream ZynqMP
> TCM bindings:
> Previous v4 version link:
> https://lore.kernel.org/all/20230829181900.2561194-1-tanmay.shah@amd.com/
>
> Previous v3 version link:
> https://lore.kernel.org/all/1689964908-22371-1-git-send-email-radhey.shyam.pandey@amd.com/
> Radhey Shyam Pandey (1):
>   dt-bindings: remoteproc: add Tightly Coupled Memory (TCM) bindings
>
>
>
> Radhey Shyam Pandey (1):
>   dt-bindings: remoteproc: add Tightly Coupled Memory (TCM) bindings
>
> Tanmay Shah (3):
>   remoteproc: zynqmp: fix lockstep mode memory region
>   dts: zynqmp: add properties for TCM in remoteproc
>   remoteproc: zynqmp: parse TCM from device tree
>
>  .../remoteproc/xlnx,zynqmp-r5fss.yaml         | 192 +++++++++++--
>  .../boot/dts/xilinx/zynqmp-zcu102-rev1.0.dts  |   8 +
>  arch/arm64/boot/dts/xilinx/zynqmp.dtsi        |  65 ++++-
>  drivers/remoteproc/xlnx_r5_remoteproc.c       | 257 ++++++++----------
>  4 files changed, 357 insertions(+), 165 deletions(-)
>
>
> base-commit: 929654e8f1add50b01d5a56171a31c311b0a739a