diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index dfd3f563c92d..6fb4f30f93cf 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -381,6 +381,8 @@ dfl_dev_add(struct dfl_feature_platform_data *pdata,
 	ddev->feature_id = feature->id;
 	ddev->revision = feature->revision;
 	ddev->cdev = pdata->dfl_cdev;
+	ddev->csr_start = feature->csr_start;
+	ddev->csr_size = feature->csr_size;
 
 	/* add mmio resource */
 	parent_res = &pdev->resource[feature->resource_index];
@@ -708,18 +710,25 @@ struct build_feature_devs_info {
  * struct dfl_feature_info - sub feature info collected during feature dev build
  *
  * @fid: id of this sub feature.
+ * @revision: revision of this sub feature
+ * @dfh_version: version of Device Feature Header (DFH)
  * @mmio_res: mmio resource of this sub feature.
  * @ioaddr: mapped base address of mmio resource.
  * @node: node in sub_features linked list.
+ * @csr_start: DFHv1 start of feature registers
+ * @csr_size: DFHv1 size of feature registers
  * @irq_base: start of irq index in this sub feature.
  * @nr_irqs: number of irqs of this sub feature.
  */
 struct dfl_feature_info {
 	u16 fid;
 	u8 revision;
+	u8 dfh_version;
 	struct resource mmio_res;
 	void __iomem *ioaddr;
 	struct list_head node;
+	resource_size_t csr_start;
+	resource_size_t csr_size;
 	unsigned int irq_base;
 	unsigned int nr_irqs;
 };
@@ -797,6 +806,8 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo)
 		feature->dev = fdev;
 		feature->id = finfo->fid;
 		feature->revision = finfo->revision;
+		feature->csr_start = finfo->csr_start;
+		feature->csr_size = finfo->csr_size;
 
 		/*
 		 * the FIU header feature has some fundamental functions (sriov
@@ -1054,6 +1065,7 @@ create_feature_instance(struct build_feature_devs_info *binfo,
 {
 	unsigned int irq_base, nr_irqs;
 	struct dfl_feature_info *finfo;
+	u8 dfh_version = 0;
 	u8 revision = 0;
 	int ret;
 	u64 v;
@@ -1061,7 +1073,7 @@ create_feature_instance(struct build_feature_devs_info *binfo,
 	if (fid != FEATURE_ID_AFU) {
 		v = readq(binfo->ioaddr + ofst);
 		revision = FIELD_GET(DFH_REVISION, v);
-
+		dfh_version = FIELD_GET(DFH_VERSION, v);
 		/* read feature size and id if inputs are invalid */
 		size = size ? size : feature_size(v);
 		fid = fid ? fid : feature_id(v);
@@ -1080,12 +1092,24 @@ create_feature_instance(struct build_feature_devs_info *binfo,
 
 	finfo->fid = fid;
 	finfo->revision = revision;
+	finfo->dfh_version = dfh_version;
 	finfo->mmio_res.start = binfo->start + ofst;
 	finfo->mmio_res.end = finfo->mmio_res.start + size - 1;
 	finfo->mmio_res.flags = IORESOURCE_MEM;
 	finfo->irq_base = irq_base;
 	finfo->nr_irqs = nr_irqs;
 
+	if (dfh_version == 1) {
+		v = readq(binfo->ioaddr + ofst + DFHv1_CSR_ADDR);
+		if (v & DFHv1_CSR_ADDR_REL)
+			finfo->csr_start = FIELD_GET(DFHv1_CSR_ADDR_MASK, v);
+		else
+			finfo->csr_start = binfo->start + ofst + FIELD_GET(DFHv1_CSR_ADDR_MASK, v);
+
+		v = readq(binfo->ioaddr + ofst + DFHv1_CSR_SIZE_GRP);
+		finfo->csr_size = FIELD_GET(DFHv1_CSR_SIZE_GRP_SIZE, v);
+	}
+
 	list_add_tail(&finfo->node, &binfo->sub_features);
 	binfo->feature_num++;
 
diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h
index e620fcb02b5a..64cedd00dca4 100644
--- a/drivers/fpga/dfl.h
+++ b/drivers/fpga/dfl.h
@@ -217,6 +217,8 @@ struct dfl_feature_irq_ctx {
  *		    this index is used to find its mmio resource from the
  *		    feature dev (platform device)'s resources.
  * @ioaddr: mapped mmio resource address.
+ * @csr_start: DFHv1 start of feature registers
+ * @csr_size: DFHv1 size of feature registers
  * @irq_ctx: interrupt context list.
  * @nr_irqs: number of interrupt contexts.
  * @ops: ops of this sub feature.
@@ -229,6 +231,8 @@ struct dfl_feature {
 	u8 revision;
 	int resource_index;
 	void __iomem *ioaddr;
+	resource_size_t csr_start;
+	resource_size_t csr_size;
 	struct dfl_feature_irq_ctx *irq_ctx;
 	unsigned int nr_irqs;
 	const struct dfl_feature_ops *ops;
diff --git a/include/linux/dfl.h b/include/linux/dfl.h
index 33e21c360671..7d74ef8d1d20 100644
--- a/include/linux/dfl.h
+++ b/include/linux/dfl.h
@@ -84,6 +84,8 @@ enum dfl_id_type {
  * @type: type of DFL FIU of the device. See enum dfl_id_type.
  * @feature_id: feature identifier local to its DFL FIU type.
  * @mmio_res: mmio resource of this dfl device.
+ * @csr_start: DFHv1 start of feature registers
+ * @csr_size: DFHv1 size of feature registers
  * @irqs: list of Linux IRQ numbers of this dfl device.
  * @num_irqs: number of IRQs supported by this dfl device.
  * @cdev: pointer to DFL FPGA container device this dfl device belongs to.
@@ -96,6 +98,8 @@ struct dfl_device {
 	u16 feature_id;
 	u8 revision;
 	struct resource mmio_res;
+	resource_size_t csr_start;
+	resource_size_t csr_size;
 	int *irqs;
 	unsigned int num_irqs;
 	struct dfl_fpga_cdev *cdev;
