Sorry, I missed some comments. Reply inline.
> > + /* release I/O mappings for next step enumeration */
> > + cci_pci_iounmap_bars(pcidev, mapped_bars);
> There is no iounmap_bars in error handling, likely need to add this.
The memory allocated by pcim_iomap_xxx will be released along with
pcidev destory.
> > +
> > /* start enumeration with prepared enumeration information */
> > cdev = dfl_fpga_feature_devs_enumerate(info);
> > if (IS_ERR(cdev)) {
> > diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
> > index 649958a..7dc6411 100644
> > --- a/drivers/fpga/dfl.c
> > +++ b/drivers/fpga/dfl.c
> > @@ -250,6 +250,11 @@ int dfl_fpga_check_port_id(struct platform_device
> > *pdev, void *pport_id)
> > }
> > EXPORT_SYMBOL_GPL(dfl_fpga_check_port_id);
> >
> > +static bool is_header_feature(struct dfl_feature *feature)
> > +{
> > + return feature->id == FEATURE_ID_FIU_HEADER;
> Could this be a macro ?
Yes
> > +}
> > +
> > /**
> > * dfl_fpga_dev_feature_uinit - uinit for sub features of dfl feature
> > device
> > * @pdev: feature device.
> > @@ -273,8 +278,20 @@ static int dfl_feature_instance_init(struct
> > platform_device *pdev,
> > struct dfl_feature *feature,
> > struct dfl_feature_driver *drv)
> > {
> > + void __iomem *base;
> > int ret = 0;
> >
> > + if (!is_header_feature(feature)) {
> > + base = devm_platform_ioremap_resource(pdev,
> > + feature->resource_index);
> > + if (IS_ERR(base)) {
> > + dev_err(&pdev->dev, "fail to get iomem resource!\n");
> > + return PTR_ERR(base);
> > + }
> > +
> > + feature->ioaddr = base;
> > + }
> > +
> > if (drv->ops->init) {
> > ret = drv->ops->init(pdev, feature);
> > if (ret)
> > @@ -427,7 +444,9 @@ EXPORT_SYMBOL_GPL(dfl_fpga_dev_ops_unregister);
> > * @irq_table: Linux IRQ numbers for all irqs, indexed by local irq index
> > of
> > * this device.
> > * @feature_dev: current feature device.
> > - * @ioaddr: header register region address of feature device in
> > enumeration.
> > + * @ioaddr: header register region address of current FIU in enumeration.
> > + * @start: register resource start of current FIU.
> > + * @len: max register resource length of current FIU.
> > * @sub_features: a sub features linked list for feature device in
> > enumeration.
> > * @feature_num: number of sub features for feature device in enumeration.
> > */
> > @@ -439,6 +458,9 @@ struct build_feature_devs_info {
> >
> > struct platform_device *feature_dev;
> > void __iomem *ioaddr;
> > + resource_size_t start;
> > + resource_size_t len;
> > +
> extra whitespace, remove
Yes
> > struct list_head sub_features;
> > int feature_num;
> > };
> > @@ -484,10 +506,7 @@ static int build_info_commit_dev(struct
> > build_feature_devs_info *binfo)
> > struct dfl_feature_platform_data *pdata;
> > struct dfl_feature_info *finfo, *p;
> > enum dfl_id_type type;
> > - int ret, index = 0;
> > -
> > - if (!fdev)
> > - return 0;
> > + int ret, index = 0, res_idx = 0;
> >
> > type = feature_dev_id_type(fdev);
> > if (WARN_ON_ONCE(type >= DFL_ID_MAX))
> > @@ -530,16 +549,30 @@ static int build_info_commit_dev(struct
> > build_feature_devs_info *binfo)
> >
> > /* fill features and resource information for feature dev */
> > list_for_each_entry_safe(finfo, p, &binfo->sub_features, node) {
> > - struct dfl_feature *feature = &pdata->features[index];
> > + struct dfl_feature *feature = &pdata->features[index++];
> > struct dfl_feature_irq_ctx *ctx;
> > unsigned int i;
> >
> > /* save resource information for each feature */
> > feature->dev = fdev;
> > feature->id = finfo->fid;
> > - feature->resource_index = index;
> > - feature->ioaddr = finfo->ioaddr;
> > - fdev->resource[index++] = finfo->mmio_res;
> > +
> > + /*
> > + * map header resource for dfl bus device. Don't add header
> > + * resource to feature devices, or the resource tree will be
> > + * disordered and cause warning on resource release
> > + */
> > + if (is_header_feature(feature)) {
> > + feature->resource_index = -1;
> > + feature->ioaddr =
> > + devm_ioremap_resource(binfo->dev,
> > + &finfo->mmio_res);
> > + if (IS_ERR(feature->ioaddr))
> > + return PTR_ERR(feature->ioaddr);
> feature->ioaddr is garbage, is this ok ?
It should be OK. We will not touch this field during cleaning up.
> > +static bool is_feature_dev_detected(struct build_feature_devs_info *binfo)
> > +{
> > + return !!binfo->feature_dev;
> Another macro.
Yes
> > +}
> > +
> > +static void dfl_binfo_shift(struct build_feature_devs_info *binfo,
> > + resource_size_t ofst)
> shift? where is shifting happening. A better name would be dfl_binfo_update
> or dfl_binfo_increment
I'll delete this function, it is not useful.
Thanks,
Yilun
