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    Subject[PATCH v6 10/17] PCI: endpoint: Allow user to create sub-directory of 'EPF Device' directory
    Date
    Documentation/PCI/endpoint/pci-endpoint-cfs.rst explains how a user
    has to create a directory in-order to create a 'EPF Device' that
    can be configured/probed by 'EPF Driver'.

    Allow user to create a sub-directory of 'EPF Device' directory for
    any function specific attributes that has to be exposed to the user.

    Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
    ---
    drivers/pci/endpoint/pci-ep-cfs.c | 23 +++++++++++++++++++++++
    include/linux/pci-epf.h | 3 +++
    2 files changed, 26 insertions(+)

    diff --git a/drivers/pci/endpoint/pci-ep-cfs.c b/drivers/pci/endpoint/pci-ep-cfs.c
    index 8f750961d6ab..f3a8b833b479 100644
    --- a/drivers/pci/endpoint/pci-ep-cfs.c
    +++ b/drivers/pci/endpoint/pci-ep-cfs.c
    @@ -490,7 +490,29 @@ static struct configfs_item_operations pci_epf_ops = {
    .release = pci_epf_release,
    };

    +static struct config_group *pci_epf_type_make(struct config_group *group,
    + const char *name)
    +{
    + struct pci_epf_group *epf_group = to_pci_epf_group(&group->cg_item);
    + struct config_group *epf_type_group;
    +
    + epf_type_group = pci_epf_type_add_cfs(epf_group->epf, group);
    + return epf_type_group;
    +}
    +
    +static void pci_epf_type_drop(struct config_group *group,
    + struct config_item *item)
    +{
    + config_item_put(item);
    +}
    +
    +static struct configfs_group_operations pci_epf_type_group_ops = {
    + .make_group = &pci_epf_type_make,
    + .drop_item = &pci_epf_type_drop,
    +};
    +
    static const struct config_item_type pci_epf_type = {
    + .ct_group_ops = &pci_epf_type_group_ops,
    .ct_item_ops = &pci_epf_ops,
    .ct_attrs = pci_epf_attrs,
    .ct_owner = THIS_MODULE,
    @@ -553,6 +575,7 @@ static struct config_group *pci_epf_make(struct config_group *group,
    goto free_name;
    }

    + epf->group = &epf_group->group;
    epf_group->epf = epf;

    kfree(epf_name);
    diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
    index b241e7dd171f..6833e2160ef1 100644
    --- a/include/linux/pci-epf.h
    +++ b/include/linux/pci-epf.h
    @@ -9,6 +9,7 @@
    #ifndef __LINUX_PCI_EPF_H
    #define __LINUX_PCI_EPF_H

    +#include <linux/configfs.h>
    #include <linux/device.h>
    #include <linux/mod_devicetable.h>
    #include <linux/pci.h>
    @@ -128,6 +129,7 @@ struct pci_epf_bar {
    * EPC device
    * @sec_epc_bar: represents the BAR of EPF device associated with secondary EPC
    * @sec_epc_func_no: unique (physical) function number within the secondary EPC
    + * @group: configfs group associated with the EPF device
    */
    struct pci_epf {
    struct device dev;
    @@ -150,6 +152,7 @@ struct pci_epf {
    struct list_head sec_epc_list;
    struct pci_epf_bar sec_epc_bar[6];
    u8 sec_epc_func_no;
    + struct config_group *group;
    };

    /**
    --
    2.17.1
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      Last update: 2020-09-24 11:27    [W:2.230 / U:0.376 seconds]
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