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SubjectRe: [V2, 2/3] interconnect: qcom: Add SC7180 interconnect provider driver
On 2020-01-05 12:25, Stephen Boyd wrote:
> Quoting Odelu Kukatla (2019-12-31 00:58:56)
>> diff --git a/drivers/interconnect/qcom/sc7180.c
>> b/drivers/interconnect/qcom/sc7180.c
>> new file mode 100644
>> index 0000000..4a398e0
>> --- /dev/null
>> +++ b/drivers/interconnect/qcom/sc7180.c
>> @@ -0,0 +1,788 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (c) 2019, The Linux Foundation. All rights reserved.
>> + *
>> + */
>> +
>> +#include <dt-bindings/interconnect/qcom,sc7180.h>
>
> Can you include this after linux/ headers? That is the "preferred" way
> to include headers.
>
done.
>> +#include <linux/device.h>
>> +#include <linux/interconnect.h>
>> +#include <linux/interconnect-provider.h>
>> +#include <linux/module.h>
>> +#include <linux/of_device.h>
>
> Hopefully this include isn't used and can be removed.
>
I will remove it.
>> +#include <linux/of_platform.h>
>
> Is this include used?
>
I will remove it.
>> +#include <linux/platform_device.h>
>> +
>> +#include "icc-rpmh.h"
>> +#include "bcm-voter.h"
>> +
> [...]
>> +
>> +static struct qcom_icc_node *system_noc_nodes[] = {
>> + [MASTER_SNOC_CFG] = &qhm_snoc_cfg,
>> + [MASTER_A1NOC_SNOC] = &qnm_aggre1_noc,
>> + [MASTER_A2NOC_SNOC] = &qnm_aggre2_noc,
>> + [MASTER_GEM_NOC_SNOC] = &qnm_gemnoc,
>> + [MASTER_PIMEM] = &qxm_pimem,
>> + [SLAVE_APPSS] = &qhs_apss,
>> + [SLAVE_SNOC_CNOC] = &qns_cnoc,
>> + [SLAVE_SNOC_GEM_NOC_GC] = &qns_gemnoc_gc,
>> + [SLAVE_SNOC_GEM_NOC_SF] = &qns_gemnoc_sf,
>> + [SLAVE_IMEM] = &qxs_imem,
>> + [SLAVE_PIMEM] = &qxs_pimem,
>> + [SLAVE_SERVICE_SNOC] = &srvc_snoc,
>> + [SLAVE_QDSS_STM] = &xs_qdss_stm,
>> + [SLAVE_TCU] = &xs_sys_tcu_cfg,
>> +};
>> +
>> +static struct qcom_icc_desc sc7180_system_noc = {
>
> Can this be const? And the other ones?
> yes, will change it.
>> + .nodes = system_noc_nodes,
>> + .num_nodes = ARRAY_SIZE(system_noc_nodes),
>> + .bcms = system_noc_bcms,
>> + .num_bcms = ARRAY_SIZE(system_noc_bcms),
>> +};
>> +
>> +static int qnoc_probe(struct platform_device *pdev)
>> +{
>> + const struct qcom_icc_desc *desc;
>> + struct icc_onecell_data *data;
>> + struct icc_provider *provider;
>> + struct qcom_icc_node **qnodes;
>> + struct qcom_icc_provider *qp;
>> + struct icc_node *node;
>> + size_t num_nodes, i;
>> + int ret;
>> +
>> + desc = of_device_get_match_data(&pdev->dev);
>
> Use device_get_match_data() instead?
>
will update it.
>> + if (!desc)
>> + return -EINVAL;
>> +
>> + qnodes = desc->nodes;
>> + num_nodes = desc->num_nodes;
>> +
>> + qp = devm_kzalloc(&pdev->dev, sizeof(*qp), GFP_KERNEL);
>> + if (!qp)
>> + return -ENOMEM;
>> +
>> + data = devm_kcalloc(&pdev->dev, num_nodes, sizeof(*node),
>> GFP_KERNEL);
>> + if (!data)
>> + return -ENOMEM;
>> +
>> + provider = &qp->provider;
>> + provider->dev = &pdev->dev;
>> + provider->set = qcom_icc_set;
>> + provider->pre_aggregate = qcom_icc_pre_aggregate;
>> + provider->aggregate = qcom_icc_aggregate;
>> + provider->xlate = of_icc_xlate_onecell;
>> + INIT_LIST_HEAD(&provider->nodes);
>> + provider->data = data;
>> +
>> + qp->dev = &pdev->dev;
>> + qp->bcms = desc->bcms;
>> + qp->num_bcms = desc->num_bcms;
>> +
>> + qp->voter = of_bcm_voter_get(qp->dev, NULL);
>> + if (IS_ERR(qp->voter))
>> + return PTR_ERR(qp->voter);
>> +
>> + ret = icc_provider_add(provider);
>> + if (ret) {
>> + dev_err(&pdev->dev, "error adding interconnect
>> provider\n");
>> + return ret;
>> + }
>> +
>> + for (i = 0; i < num_nodes; i++) {
>> + size_t j;
>> +
>> + if (!qnodes[i])
>> + continue;
>> +
>> + node = icc_node_create(qnodes[i]->id);
>> + if (IS_ERR(node)) {
>> + ret = PTR_ERR(node);
>> + goto err;
>> + }
>> +
>> + node->name = qnodes[i]->name;
>> + node->data = qnodes[i];
>> + icc_node_add(node, provider);
>> +
>> + dev_dbg(&pdev->dev, "registered node %pK %s %d\n",
>> node,
>> + qnodes[i]->name, node->id);
>
> Is this more debug junk? Maybe if it is useful it can be part of the
> core framework instead of in this driver?
>
>> +
>> + /* populate links */
>
> Useless comment.
> i will clean up this.
>> + for (j = 0; j < qnodes[i]->num_links; j++)
>> + icc_link_create(node, qnodes[i]->links[j]);
>> +
>> + data->nodes[i] = node;
>> + }
>> + data->num_nodes = num_nodes;
>> +
>> + for (i = 0; i < qp->num_bcms; i++)
>> + qcom_icc_bcm_init(qp->bcms[i], &pdev->dev);
>> +
>> + platform_set_drvdata(pdev, qp);
>> +
>> + dev_dbg(&pdev->dev, "Registered SC7180 ICC\n");
>
> This driver debug message is pretty useless. Please remove it.
> i will removr it.
>> +
>> + return ret;
>
> return 0?
>
>> +err:
>> + icc_nodes_remove(provider);
>> + icc_provider_del(provider);
>> + return ret;
>> +}
>> +
>> +static int qnoc_remove(struct platform_device *pdev)
>> +{
>> + struct qcom_icc_provider *qp = platform_get_drvdata(pdev);
>> +
>> + icc_nodes_remove(&qp->provider);
>> + return icc_provider_del(&qp->provider);
>> +}
>> +
>> +static const struct of_device_id qnoc_of_match[] = {
>> + { .compatible = "qcom,sc7180-aggre1-noc",
>> + .data = &sc7180_aggre1_noc},
>> + { .compatible = "qcom,sc7180-aggre2-noc",
>> + .data = &sc7180_aggre2_noc},
>> + { .compatible = "qcom,sc7180-camnoc-virt",
>> + .data = &sc7180_camnoc_virt},
>> + { .compatible = "qcom,sc7180-compute-noc",
>> + .data = &sc7180_compute_noc},
>> + { .compatible = "qcom,sc7180-config-noc",
>> + .data = &sc7180_config_noc},
>> + { .compatible = "qcom,sc7180-dc-noc",
>> + .data = &sc7180_dc_noc},
>> + { .compatible = "qcom,sc7180-gem-noc",
>> + .data = &sc7180_gem_noc},
>> + { .compatible = "qcom,sc7180-ipa-virt",
>> + .data = &sc7180_ipa_virt},
>> + { .compatible = "qcom,sc7180-mc-virt",
>> + .data = &sc7180_mc_virt},
>> + { .compatible = "qcom,sc7180-mmss-noc",
>> + .data = &sc7180_mmss_noc},
>> + { .compatible = "qcom,sc7180-npu-noc",
>> + .data = &sc7180_npu_noc},
>> + { .compatible = "qcom,sc7180-qup-virt",
>> + .data = &sc7180_qup_virt},
>> + { .compatible = "qcom,sc7180-system-noc",
>> + .data = &sc7180_system_noc},
>> + { },
>
> Nitpick: Drop the comma as it's the sentinel and nothing can come
> after.
> will remove it.
>> +};
>> +MODULE_DEVICE_TABLE(of, qnoc_of_match);

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