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Message-ID: <051c1902-2e76-9fa3-1b82-e55387f834dc@amd.com>
Date: Wed, 22 Feb 2023 14:47:02 -0600
From: Tanmay Shah <tanmays@....com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>,
Tanmay Shah <tanmay.shah@....com>
Cc: michal.simek@....com, andersson@...nel.org,
jaswinder.singh@...aro.org, ben.levinsky@....com,
shubhrajyoti.datta@....com, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-remoteproc@...r.kernel.org
Subject: Re: [PATCH v3 2/3] drivers: remoteproc: xilinx: fix carveout names
Hi Mathieu,
Thanks for the reviews. I agree to all the comments and will address in
the next revision accordingly.
Thanks,
Tanmay
On 2/22/23 10:41 AM, Mathieu Poirier wrote:
> On Mon, Feb 13, 2023 at 01:18:25PM -0800, Tanmay Shah wrote:
>> If the unit address is appended to node name of memory-region,
>> then adding rproc carveouts fails as node name and unit-address
>> both are passed as carveout name (i.e. vdev0vring0@...xxxxx). However,
>> only node name is expected by remoteproc framework. This patch moves
>> memory-region node parsing from driver probe to prepare and
>> only passes node-name and not unit-address
>>
>> Fixes: 6b291e8020a8 ("drivers: remoteproc: Add Xilinx r5 remoteproc driver")
>> Signed-off-by: Tanmay Shah <tanmay.shah@....com>
>> ---
>>
>> Changelog:
>> - This is first version of this change, however posting as part of the series
>> that has version v3. The v2 of the series could be found at following link.
>>
>> v2: https://lore.kernel.org/all/20230126213154.1707300-1-tanmay.shah@amd.com/
>>
>> drivers/remoteproc/xlnx_r5_remoteproc.c | 87 ++++++-------------------
>> 1 file changed, 20 insertions(+), 67 deletions(-)
>>
>> diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
>> index 2db57d394155..81af2dea56c2 100644
>> --- a/drivers/remoteproc/xlnx_r5_remoteproc.c
>> +++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
>> @@ -61,8 +61,6 @@ static const struct mem_bank_data zynqmp_tcm_banks[] = {
>> * @np: device node of RPU instance
>> * @tcm_bank_count: number TCM banks accessible to this RPU
>> * @tcm_banks: array of each TCM bank data
>> - * @rmem_count: Number of reserved mem regions
>> - * @rmem: reserved memory region nodes from device tree
>> * @rproc: rproc handle
>> * @pm_domain_id: RPU CPU power domain id
>> */
>> @@ -71,8 +69,6 @@ struct zynqmp_r5_core {
>> struct device_node *np;
>> int tcm_bank_count;
>> struct mem_bank_data **tcm_banks;
>> - int rmem_count;
>> - struct reserved_mem **rmem;
>> struct rproc *rproc;
>> u32 pm_domain_id;
>> };
>> @@ -239,21 +235,31 @@ static int add_mem_regions_carveout(struct rproc *rproc)
>> {
>> struct rproc_mem_entry *rproc_mem;
>> struct zynqmp_r5_core *r5_core;
>> + struct device_node *rmem_np;
>> struct reserved_mem *rmem;
>> int i, num_mem_regions;
>>
>> r5_core = (struct zynqmp_r5_core *)rproc->priv;
>> - num_mem_regions = r5_core->rmem_count;
>> +
>> + num_mem_regions = of_property_count_elems_of_size(r5_core->np, "memory-region",
>> + sizeof(phandle));
>>
>> for (i = 0; i < num_mem_regions; i++) {
>> - rmem = r5_core->rmem[i];
>>
> Extra line
>
> Everyone else in the remoteproc subsystem is using of_phandle_iterator_next(),
> please do the same. It is easier to maintain and you don't have to call
> of_node_put() after each iteration.
>
>
>> - if (!strncmp(rmem->name, "vdev0buffer", strlen("vdev0buffer"))) {
>> + rmem_np = of_parse_phandle(r5_core->np, "memory-region", i);
>> +
>> + rmem = of_reserved_mem_lookup(rmem_np);
>> + if (!rmem) {
>> + of_node_put(rmem_np);
>> + return -EINVAL;
>> + }
>> +
>> + if (!strcmp(rmem_np->name, "vdev0buffer")) {
>> /* Init reserved memory for vdev buffer */
>> rproc_mem = rproc_of_resm_mem_entry_init(&rproc->dev, i,
>> rmem->size,
>> rmem->base,
>> - rmem->name);
>> + rmem_np->name);
>> } else {
>> /* Register associated reserved memory regions */
>> rproc_mem = rproc_mem_entry_init(&rproc->dev, NULL,
>> @@ -261,16 +267,20 @@ static int add_mem_regions_carveout(struct rproc *rproc)
>> rmem->size, rmem->base,
>> zynqmp_r5_mem_region_map,
>> zynqmp_r5_mem_region_unmap,
>> - rmem->name);
>> + rmem_np->name);
>> }
>>
>> - if (!rproc_mem)
>> + if (!rproc_mem) {
>> + of_node_put(rmem_np);
> When moving to of_phandle_iterator_next(), of_node_put(it.node) has to be
> called on error conditions. Other drivers don't do it, something I will fix in
> the next cycle.
>
>> return -ENOMEM;
>> + }
>>
>> rproc_add_carveout(rproc, rproc_mem);
>>
>> dev_dbg(&rproc->dev, "reserved mem carveout %s addr=%llx, size=0x%llx",
>> rmem->name, rmem->base, rmem->size);
>> +
>> + of_node_put(rmem_np);
>> }
>>
>> return 0;
>> @@ -726,59 +736,6 @@ static int zynqmp_r5_get_tcm_node(struct zynqmp_r5_cluster *cluster)
>> return 0;
>> }
>>
>> -/**
>> - * zynqmp_r5_get_mem_region_node()
>> - * parse memory-region property and get reserved mem regions
>> - *
>> - * @r5_core: pointer to zynqmp_r5_core type object
>> - *
>> - * Return: 0 for success and error code for failure.
>> - */
>> -static int zynqmp_r5_get_mem_region_node(struct zynqmp_r5_core *r5_core)
>> -{
>> - struct device_node *np, *rmem_np;
>> - struct reserved_mem **rmem;
>> - int res_mem_count, i;
>> - struct device *dev;
>> -
>> - dev = r5_core->dev;
>> - np = r5_core->np;
>> -
>> - res_mem_count = of_property_count_elems_of_size(np, "memory-region",
>> - sizeof(phandle));
>> - if (res_mem_count <= 0) {
>> - dev_warn(dev, "failed to get memory-region property %d\n",
>> - res_mem_count);
>> - return 0;
>> - }
>> -
>> - rmem = devm_kcalloc(dev, res_mem_count,
>> - sizeof(struct reserved_mem *), GFP_KERNEL);
>> - if (!rmem)
>> - return -ENOMEM;
>> -
>> - for (i = 0; i < res_mem_count; i++) {
>> - rmem_np = of_parse_phandle(np, "memory-region", i);
>> - if (!rmem_np)
>> - goto release_rmem;
>> -
>> - rmem[i] = of_reserved_mem_lookup(rmem_np);
>> - if (!rmem[i]) {
>> - of_node_put(rmem_np);
>> - goto release_rmem;
>> - }
>> -
>> - of_node_put(rmem_np);
>> - }
>> -
>> - r5_core->rmem_count = res_mem_count;
>> - r5_core->rmem = rmem;
>> - return 0;
>> -
>> -release_rmem:
>> - return -EINVAL;
>> -}
>> -
>> /*
>> * zynqmp_r5_core_init()
>> * Create and initialize zynqmp_r5_core type object
>> @@ -806,10 +763,6 @@ static int zynqmp_r5_core_init(struct zynqmp_r5_cluster *cluster,
>> for (i = 0; i < cluster->core_count; i++) {
>> r5_core = cluster->r5_cores[i];
>>
>> - ret = zynqmp_r5_get_mem_region_node(r5_core);
>> - if (ret)
>> - dev_warn(dev, "memory-region prop failed %d\n", ret);
>> -
>> /* Initialize r5 cores with power-domains parsed from dts */
>> ret = of_property_read_u32_index(r5_core->np, "power-domains",
>> 1, &r5_core->pm_domain_id);
>> --
>> 2.25.1
>>
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