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Date: Mon, 24 Feb 2020 09:15:22 -0500
From: "Andrew F. Davis" <afd@...com>
To: Tero Kristo <t-kristo@...com>, <bjorn.andersson@...aro.org>,
<ohad@...ery.com>, <linux-remoteproc@...r.kernel.org>,
<s-anna@...com>
CC: <linux-kernel@...r.kernel.org>, <mathieu.poirier@...aro.org>,
<linux-omap@...r.kernel.org>
Subject: Re: [PATCHv7 04/15] remoteproc/omap: Add support to parse internal
memories from DT
On 2/21/20 5:19 AM, Tero Kristo wrote:
> From: Suman Anna <s-anna@...com>
>
> The OMAP remoteproc driver has been enhanced to parse and store
> the kernel mappings for different internal RAM memories that may
> be present within each remote processor IP subsystem. Different
> devices have varying memories present on current SoCs. The current
> support handles the L2RAM for all IPU devices on OMAP4+ SoCs. The
> DSPs on OMAP4/OMAP5 only have Unicaches and do not have any L1 or
> L2 RAM memories.
>
> IPUs are expected to have the L2RAM at a fixed device address of
> 0x20000000, based on the current limitations on Attribute MMU
> configurations.
>
> NOTE:
> The current logic doesn't handle the parsing of memories for DRA7
> remoteproc devices, and will be added alongside the DRA7 support.
>
> Signed-off-by: Suman Anna <s-anna@...com>
> [t-kristo: converted to parse mem names / device addresses from pdata]
> Signed-off-by: Tero Kristo <t-kristo@...com>
> ---
> drivers/remoteproc/omap_remoteproc.c | 89 ++++++++++++++++++++++++++++
> 1 file changed, 89 insertions(+)
>
> diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
> index 64b559caadff..4f92b069f5d0 100644
> --- a/drivers/remoteproc/omap_remoteproc.c
> +++ b/drivers/remoteproc/omap_remoteproc.c
> @@ -39,11 +39,27 @@ struct omap_rproc_boot_data {
> unsigned int boot_reg;
> };
>
> +/**
> + * struct omap_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 DSP view
> + * @size: size of the memory region
> + */
> +struct omap_rproc_mem {
> + void __iomem *cpu_addr;
> + phys_addr_t bus_addr;
> + u32 dev_addr;
> + size_t size;
> +};
> +
> /**
> * struct omap_rproc - omap remote processor state
> * @mbox: mailbox channel handle
> * @client: mailbox client to request the mailbox channel
> * @boot_data: boot data structure for setting processor boot address
> + * @mem: internal memory regions data
> + * @num_mems: number of internal memory regions
> * @rproc: rproc handle
> * @reset: reset handle
> */
> @@ -51,16 +67,30 @@ struct omap_rproc {
> struct mbox_chan *mbox;
> struct mbox_client client;
> struct omap_rproc_boot_data *boot_data;
> + struct omap_rproc_mem *mem;
> + int num_mems;
> struct rproc *rproc;
> struct reset_control *reset;
> };
>
> +/**
> + * struct omap_rproc_mem_data - memory definitions for an omap remote processor
> + * @name: name for this memory entry
> + * @dev_addr: device address for the memory entry
> + */
> +struct omap_rproc_mem_data {
> + const char *name;
> + const u32 dev_addr;
> +};
> +
> /**
> * struct omap_rproc_dev_data - device data for the omap remote processor
> * @device_name: device name of the remote processor
> + * @mems: memory definitions for this remote processor
> */
> struct omap_rproc_dev_data {
> const char *device_name;
> + const struct omap_rproc_mem_data *mems;
> };
>
> /**
> @@ -223,12 +253,18 @@ static const struct rproc_ops omap_rproc_ops = {
> .kick = omap_rproc_kick,
> };
>
> +static const struct omap_rproc_mem_data ipu_mems[] = {
> + { .name = "l2ram", .dev_addr = 0x20000000 },
> + { },
> +};
> +
> static const struct omap_rproc_dev_data omap4_dsp_dev_data = {
> .device_name = "dsp",
> };
>
> static const struct omap_rproc_dev_data omap4_ipu_dev_data = {
> .device_name = "ipu",
> + .mems = ipu_mems,
> };
>
> static const struct omap_rproc_dev_data omap5_dsp_dev_data = {
> @@ -237,6 +273,7 @@ static const struct omap_rproc_dev_data omap5_dsp_dev_data = {
>
> static const struct omap_rproc_dev_data omap5_ipu_dev_data = {
> .device_name = "ipu",
> + .mems = ipu_mems,
> };
>
> static const struct of_device_id omap_rproc_of_match[] = {
> @@ -311,6 +348,54 @@ static int omap_rproc_get_boot_data(struct platform_device *pdev,
> return 0;
> }
>
> +static int omap_rproc_of_get_internal_memories(struct platform_device *pdev,
> + struct rproc *rproc)
> +{
> + struct omap_rproc *oproc = rproc->priv;
'rproc' is only used to get 'oproc', why not just pass in 'oproc'?
> + struct device *dev = &pdev->dev;
> + const struct omap_rproc_dev_data *data;
> + struct resource *res;
> + int num_mems;
> + int i;
> +
> + data = of_device_get_match_data(&pdev->dev);
just use 'dev'
> + if (!data)
> + return -ENODEV;
> +
> + if (!data->mems)
> + return 0;
> +
> + for (num_mems = 0; data->mems[num_mems].name; num_mems++)
> + ;
> +
> + oproc->mem = devm_kcalloc(dev, num_mems, sizeof(*oproc->mem),
> + GFP_KERNEL);
> + if (!oproc->mem)
> + return -ENOMEM;
> +
> + for (i = 0; i < num_mems; i++) {
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> + data->mems[i].name);
> + oproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
> + if (IS_ERR(oproc->mem[i].cpu_addr)) {
> + dev_err(dev, "failed to parse and map %s memory\n",
> + data->mems[i].name);
> + return PTR_ERR(oproc->mem[i].cpu_addr);
> + }
> + oproc->mem[i].bus_addr = res->start;
> + oproc->mem[i].dev_addr = data->mems[i].dev_addr;
> + oproc->mem[i].size = resource_size(res);
> +
> + dev_dbg(dev, "memory %8s: bus addr %pa size 0x%x va %pK da 0x%x\n",
> + data->mems[i].name, &oproc->mem[i].bus_addr,
> + oproc->mem[i].size, oproc->mem[i].cpu_addr,
I'm not a fan of printing kernel virtual addresses, but not a blocker.
> + oproc->mem[i].dev_addr);
> + }
> + oproc->num_mems = num_mems;
> +
> + return 0;
> +}
> +
> static int omap_rproc_probe(struct platform_device *pdev)
> {
> struct device_node *np = pdev->dev.of_node;
> @@ -350,6 +435,10 @@ static int omap_rproc_probe(struct platform_device *pdev)
> /* All existing OMAP IPU and DSP processors have an MMU */
> rproc->has_iommu = true;
>
> + ret = omap_rproc_of_get_internal_memories(pdev, rproc);
This only looks to be used for the da_to_va() in the next patch, could
these be combined?
As above not a big deal, so for this patch and the whole series:
Reviewed-by: Andrew F. Davis <afd@...com>
> + if (ret)
> + goto free_rproc;
> +
> ret = omap_rproc_get_boot_data(pdev, rproc);
> if (ret)
> goto free_rproc;
>
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