Message-ID: <e0f604e0-f7e1-4ef3-8370-fc9f9213170d@ti.com>
Date: Mon, 5 Feb 2024 16:36:25 -0600
From: Andrew Davis <afd@...com>
To: Hari Nagalla <hnagalla@...com>, <andersson@...nel.org>,
        <mathieu.poirier@...aro.org>, <p.zabel@...gutronix.de>,
        <martyn.welch@...labora.com>, <nm@...com>, <vigneshr@...com>,
        <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>
CC: <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v7 2/5] remoteproc: k3: Move out data structures common
 with M4 driver

On 2/2/24 11:55 AM, Hari Nagalla wrote:
> From: Martyn Welch <martyn.welch@...labora.com>
> 
> We will be adding the M4F driver which shares a lot of commonality
> with the DSP driver. Common data structures are introduced here.
> 
> Signed-off-by: Martyn Welch <martyn.welch@...labora.com>
> Signed-off-by: Hari Nagalla <hnagalla@...com>
> ---
> Changes since v5:
>   - Created a separate patch for data structures to ease review
> 
> Changes since v6:
>   - Reworded 'split' to 'move' as the common data structures between
>     DSP and M4 remote rpoc drivers are moved into common driver.
> 

Is this a joke? In v6 Krzysztof commented the following:

> Where is the split? I see only addition here.
> 
> Where is the usage of this header? This is basically dead code. Don't
> add dead code, but instead actually move the structures here! Move is
> cut and paste, not just paste.

Instead of changing the patch in any way to address this comment you
just replaced the word 'split' to 'move' in the commit subject.. Maybe
no one will notice this is all still dead code since you didn't say the
word 'split' anymore..

Andrew

> link to v6:
> https://lore.kernel.org/all/20230913111644.29889-3-hnagalla@ti.com/
> 
>   drivers/remoteproc/ti_k3_common.h | 107 ++++++++++++++++++++++++++++++
>   1 file changed, 107 insertions(+)
>   create mode 100644 drivers/remoteproc/ti_k3_common.h
> 
> diff --git a/drivers/remoteproc/ti_k3_common.h b/drivers/remoteproc/ti_k3_common.h
> new file mode 100644
> index 000000000000..f1bab83dd0fc
> --- /dev/null
> +++ b/drivers/remoteproc/ti_k3_common.h
> @@ -0,0 +1,107 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * TI K3 Remote Processor(s) driver common code
> + *
> + * Refactored from ti_k3_dsp_remoteproc.c.
> + *
> + * ti_k3_dsp_remoteproc.c:
> + * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
> + *	Suman Anna <s-anna@...com>
> + */
> +
> +#ifndef REMOTEPROC_TI_K3_COMMON_H
> +#define REMOTEPROC_TI_K3_COMMON_H
> +
> +#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK	(SZ_16M - 1)
> +
> +/**
> + * struct k3_rproc_mem - internal memory structure
> + * @cpu_addr: MPU virtual address of the memory region
> + * @bus_addr: Bus address used to access the memory region
> + * @dev_addr: Device address of the memory region from remote processor view
> + * @size: Size of the memory region
> + */
> +struct k3_rproc_mem {
> +	void __iomem *cpu_addr;
> +	phys_addr_t bus_addr;
> +	u32 dev_addr;
> +	size_t size;
> +};
> +
> +/**
> + * struct k3_rproc_mem_data - memory definitions for a remote processor
> + * @name: name for this memory entry
> + * @dev_addr: device address for the memory entry
> + */
> +struct k3_rproc_mem_data {
> +	const char *name;
> +	const u32 dev_addr;
> +};
> +
> +/**
> + * struct k3_rproc_dev_data - device data structure for a remote processor
> + * @mems: pointer to memory definitions for a remote processor
> + * @num_mems: number of memory regions in @mems
> + * @boot_align_addr: boot vector address alignment granularity
> + * @uses_lreset: flag to denote the need for local reset management
> + */
> +struct k3_rproc_dev_data {
> +	const struct k3_rproc_mem_data *mems;
> +	u32 num_mems;
> +	u32 boot_align_addr;
> +	bool uses_lreset;
> +};
> +
> +/**
> + * struct k3_rproc - k3 remote processor driver structure
> + * @dev: cached device pointer
> + * @rproc: remoteproc device handle
> + * @mem: internal memory regions data
> + * @num_mems: number of internal memory regions
> + * @rmem: reserved memory regions data
> + * @num_rmems: number of reserved memory regions
> + * @reset: reset control handle
> + * @data: pointer to device data
> + * @tsp: TI-SCI processor control handle
> + * @ti_sci: TI-SCI handle
> + * @ti_sci_id: TI-SCI device identifier
> + * @mbox: mailbox channel handle
> + * @client: mailbox client to request the mailbox channel
> + */
> +struct k3_rproc {
> +	struct device *dev;
> +	struct rproc *rproc;
> +	struct k3_rproc_mem *mem;
> +	int num_mems;
> +	struct k3_rproc_mem *sram;
> +	int num_sram;
> +	struct k3_rproc_mem *rmem;
> +	int num_rmems;
> +	struct reset_control *reset;
> +	const struct k3_rproc_dev_data *data;
> +	struct ti_sci_proc *tsp;
> +	const struct ti_sci_handle *ti_sci;
> +	u32 ti_sci_id;
> +	struct mbox_chan *mbox;
> +	struct mbox_client client;
> +};
> +
> +void k3_rproc_kick(struct rproc *rproc, int vqid);
> +int k3_rproc_reset(struct k3_rproc *kproc);
> +int k3_rproc_release(struct k3_rproc *kproc);
> +int k3_rproc_request_mbox(struct rproc *rproc);
> +int k3_rproc_prepare(struct rproc *rproc);
> +int k3_rproc_unprepare(struct rproc *rproc);
> +struct resource_table *k3_get_loaded_rsc_table(struct rproc *rproc,
> +					       size_t *rsc_table_sz);
> +void *k3_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len,
> +			bool *is_iomem);
> +int k3_rproc_of_get_memories(struct platform_device *pdev,
> +			     struct k3_rproc *kproc);
> +int k3_rproc_of_get_sram_memories(struct platform_device *pdev,
> +			     struct k3_rproc *kproc);
> +int k3_reserved_mem_init(struct k3_rproc *kproc);
> +void k3_reserved_mem_exit(struct k3_rproc *kproc);
> +struct ti_sci_proc *k3_rproc_of_get_tsp(struct device *dev,
> +					const struct ti_sci_handle *sci);
> +#endif /* REMOTEPROC_TI_K3_COMMON_H */

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