Merge tag 'fpga-late-for-5.20-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/fpga/linux-fpga into char-misc-next

Xu writes:

Here is the second set of FPGA changes for 5.20-rc1

FPGA Manager core:
- Ivan's change to support image offset and data size setting for
reprograming. A parse_header() callback is introduced for drivers to
specify these info.
- Colin's immediate spelling fix for Ivan's patch.

Microchip:
- Ivan's change to add Microchip MPF FPGA manager driver. And MAINTAINERS
entry added for the driver.

All patches have been reviewed on the mailing list, and have been in the
last linux-next releases (as part of our for-next branch).

Signed-off-by: Xu Yilun <yilun.xu@intel.com>

* tag 'fpga-late-for-5.20-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/fpga/linux-fpga:
  fpga: fpga-mgr: Fix spelling mistake "bitsream" -> "bitstream"
  MAINTAINERS: add Microchip PolarFire FPGA drivers entry
  dt-bindings: fpga: add binding doc for microchip-spi fpga mgr
  fpga: microchip-spi: add Microchip MPF FPGA manager
  docs: fpga: mgr: document parse_header() callback
  fpga: fpga-mgr: support bitstream offset in image buffer

8 files changed, 700 insertions, 33 deletions

diff --git a/Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml b/Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml
new file mode 100644
index 000000000000..aee45cb15592
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/fpga/microchip,mpf-spi-fpga-mgr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip Polarfire FPGA manager.
+
+maintainers:
+  - Ivan Bornyakov <i.bornyakov@metrotek.ru>
+
+description:
+  Device Tree Bindings for Microchip Polarfire FPGA Manager using slave SPI to
+  load the bitstream in .dat format.
+
+properties:
+  compatible:
+    enum:
+      - microchip,mpf-spi-fpga-mgr
+
+  reg:
+    description: SPI chip select
+    maxItems: 1
+
+  spi-max-frequency: true
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            fpga_mgr@0 {
+                    compatible = "microchip,mpf-spi-fpga-mgr";
+                    spi-max-frequency = <20000000>;
+                    reg = <0>;
+            };
+    };
diff --git a/Documentation/driver-api/fpga/fpga-mgr.rst b/Documentation/driver-api/fpga/fpga-mgr.rst
index 42c01f396dce..49c0a9512653 100644
--- a/Documentation/driver-api/fpga/fpga-mgr.rst
+++ b/Documentation/driver-api/fpga/fpga-mgr.rst
@@ -79,12 +79,27 @@ do the programming sequence for this particular FPGA.  These ops return 0 for
 success or negative error codes otherwise.
 
 The programming sequence is::
- 1. .write_init
- 2. .write or .write_sg (may be called once or multiple times)
- 3. .write_complete
-
-The .write_init function will prepare the FPGA to receive the image data.  The
-buffer passed into .write_init will be at most .initial_header_size bytes long;
+ 1. .parse_header (optional, may be called once or multiple times)
+ 2. .write_init
+ 3. .write or .write_sg (may be called once or multiple times)
+ 4. .write_complete
+
+The .parse_header function will set header_size and data_size to
+struct fpga_image_info. Before parse_header call, header_size is initialized
+with initial_header_size. If flag skip_header of fpga_manager_ops is true,
+.write function will get image buffer starting at header_size offset from the
+beginning. If data_size is set, .write function will get data_size bytes of
+the image buffer, otherwise .write will get data up to the end of image buffer.
+This will not affect .write_sg, .write_sg will still get whole image in
+sg_table form. If FPGA image is already mapped as a single contiguous buffer,
+whole buffer will be passed into .parse_header. If image is in scatter-gather
+form, core code will buffer up at least .initial_header_size before the first
+call of .parse_header, if it is not enough, .parse_header should set desired
+size into info->header_size and return -EAGAIN, then it will be called again
+with greater part of image buffer on the input.
+
+The .write_init function will prepare the FPGA to receive the image data. The
+buffer passed into .write_init will be at least info->header_size bytes long;
 if the whole bitstream is not immediately available then the core code will
 buffer up at least this much before starting.
 
diff --git a/MAINTAINERS b/MAINTAINERS
index 9fb4ec35f6fc..916cb822bcdc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7914,6 +7914,14 @@ S:	Maintained
 F:	Documentation/ABI/testing/sysfs-driver-intel-m10-bmc-sec-update
 F:	drivers/fpga/intel-m10-bmc-sec-update.c
 
+MICROCHIP POLARFIRE FPGA DRIVERS
+M:	Conor Dooley <conor.dooley@microchip.com>
+R:	Ivan Bornyakov <i.bornyakov@metrotek.ru>
+L:	linux-fpga@vger.kernel.org
+S:	Supported
+F:	Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml
+F:	drivers/fpga/microchip-spi.c
+
 FPU EMULATOR
 M:	Bill Metzenthen <billm@melbpc.org.au>
 S:	Maintained
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index 0831eecc9a09..6c416955da53 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -255,4 +255,12 @@ config FPGA_M10_BMC_SEC_UPDATE
 	  (BMC) and provides support for secure updates for the BMC image,
 	  the FPGA image, the Root Entry Hashes, etc.
 
+config FPGA_MGR_MICROCHIP_SPI
+	tristate "Microchip Polarfire SPI FPGA manager"
+	depends on SPI
+	help
+	  FPGA manager driver support for Microchip Polarfire FPGAs
+	  programming over slave SPI interface with .dat formatted
+	  bitstream image.
+
 endif # FPGA
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index 139ac1b573d3..42ae8b58abce 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_FPGA_MGR_XILINX_SPI)	+= xilinx-spi.o
 obj-$(CONFIG_FPGA_MGR_ZYNQ_FPGA)	+= zynq-fpga.o
 obj-$(CONFIG_FPGA_MGR_ZYNQMP_FPGA)	+= zynqmp-fpga.o
 obj-$(CONFIG_FPGA_MGR_VERSAL_FPGA)	+= versal-fpga.o
+obj-$(CONFIG_FPGA_MGR_MICROCHIP_SPI)	+= microchip-spi.o
 obj-$(CONFIG_ALTERA_PR_IP_CORE)		+= altera-pr-ip-core.o
 obj-$(CONFIG_ALTERA_PR_IP_CORE_PLAT)	+= altera-pr-ip-core-plat.o
 
diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index 08dc85fcd511..8efa67620e21 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -74,6 +74,15 @@ static inline int fpga_mgr_write_complete(struct fpga_manager *mgr,
 	return 0;
 }
 
+static inline int fpga_mgr_parse_header(struct fpga_manager *mgr,
+					struct fpga_image_info *info,
+					const char *buf, size_t count)
+{
+	if (mgr->mops->parse_header)
+		return mgr->mops->parse_header(mgr, info, buf, count);
+	return 0;
+}
+
 static inline int fpga_mgr_write_init(struct fpga_manager *mgr,
 				      struct fpga_image_info *info,
 				      const char *buf, size_t count)
@@ -136,24 +145,141 @@ void fpga_image_info_free(struct fpga_image_info *info)
 EXPORT_SYMBOL_GPL(fpga_image_info_free);
 
 /*
- * Call the low level driver's write_init function.  This will do the
+ * Call the low level driver's parse_header function with entire FPGA image
+ * buffer on the input. This will set info->header_size and info->data_size.
+ */
+static int fpga_mgr_parse_header_mapped(struct fpga_manager *mgr,
+					struct fpga_image_info *info,
+					const char *buf, size_t count)
+{
+	int ret;
+
+	mgr->state = FPGA_MGR_STATE_PARSE_HEADER;
+	ret = fpga_mgr_parse_header(mgr, info, buf, count);
+
+	if (info->header_size + info->data_size > count) {
+		dev_err(&mgr->dev, "Bitstream data outruns FPGA image\n");
+		ret = -EINVAL;
+	}
+
+	if (ret) {
+		dev_err(&mgr->dev, "Error while parsing FPGA image header\n");
+		mgr->state = FPGA_MGR_STATE_PARSE_HEADER_ERR;
+	}
+
+	return ret;
+}
+
+/*
+ * Call the low level driver's parse_header function with first fragment of
+ * scattered FPGA image on the input. If header fits first fragment,
+ * parse_header will set info->header_size and info->data_size. If it is not,
+ * parse_header will set desired size to info->header_size and -EAGAIN will be
+ * returned.
+ */
+static int fpga_mgr_parse_header_sg_first(struct fpga_manager *mgr,
+					  struct fpga_image_info *info,
+					  struct sg_table *sgt)
+{
+	struct sg_mapping_iter miter;
+	int ret;
+
+	mgr->state = FPGA_MGR_STATE_PARSE_HEADER;
+
+	sg_miter_start(&miter, sgt->sgl, sgt->nents, SG_MITER_FROM_SG);
+	if (sg_miter_next(&miter) &&
+	    miter.length >= info->header_size)
+		ret = fpga_mgr_parse_header(mgr, info, miter.addr, miter.length);
+	else
+		ret = -EAGAIN;
+	sg_miter_stop(&miter);
+
+	if (ret && ret != -EAGAIN) {
+		dev_err(&mgr->dev, "Error while parsing FPGA image header\n");
+		mgr->state = FPGA_MGR_STATE_PARSE_HEADER_ERR;
+	}
+
+	return ret;
+}
+
+/*
+ * Copy scattered FPGA image fragments to temporary buffer and call the
+ * low level driver's parse_header function. This should be called after
+ * fpga_mgr_parse_header_sg_first() returned -EAGAIN. In case of success,
+ * pointer to the newly allocated image header copy will be returned and
+ * its size will be set into *ret_size. Returned buffer needs to be freed.
+ */
+static void *fpga_mgr_parse_header_sg(struct fpga_manager *mgr,
+				      struct fpga_image_info *info,
+				      struct sg_table *sgt, size_t *ret_size)
+{
+	size_t len, new_header_size, header_size = 0;
+	char *new_buf, *buf = NULL;
+	int ret;
+
+	do {
+		new_header_size = info->header_size;
+		if (new_header_size <= header_size) {
+			dev_err(&mgr->dev, "Requested invalid header size\n");
+			ret = -EFAULT;
+			break;
+		}
+
+		new_buf = krealloc(buf, new_header_size, GFP_KERNEL);
+		if (!new_buf) {
+			ret = -ENOMEM;
+			break;
+		}
+
+		buf = new_buf;
+
+		len = sg_pcopy_to_buffer(sgt->sgl, sgt->nents,
+					 buf + header_size,
+					 new_header_size - header_size,
+					 header_size);
+		if (len != new_header_size - header_size) {
+			ret = -EFAULT;
+			break;
+		}
+
+		header_size = new_header_size;
+		ret = fpga_mgr_parse_header(mgr, info, buf, header_size);
+	} while (ret == -EAGAIN);
+
+	if (ret) {
+		dev_err(&mgr->dev, "Error while parsing FPGA image header\n");
+		mgr->state = FPGA_MGR_STATE_PARSE_HEADER_ERR;
+		kfree(buf);
+		buf = ERR_PTR(ret);
+	}
+
+	*ret_size = header_size;
+
+	return buf;
+}
+
+/*
+ * Call the low level driver's write_init function. This will do the
  * device-specific things to get the FPGA into the state where it is ready to
- * receive an FPGA image. The low level driver only gets to see the first
- * initial_header_size bytes in the buffer.
+ * receive an FPGA image. The low level driver gets to see at least first
+ * info->header_size bytes in the buffer. If info->header_size is 0,
+ * write_init will not get any bytes of image buffer.
  */
 static int fpga_mgr_write_init_buf(struct fpga_manager *mgr,
 				   struct fpga_image_info *info,
 				   const char *buf, size_t count)
 {
+	size_t header_size = info->header_size;
 	int ret;
 
 	mgr->state = FPGA_MGR_STATE_WRITE_INIT;
-	if (!mgr->mops->initial_header_size) {
+
+	if (header_size > count)
+		ret = -EINVAL;
+	else if (!header_size)
 		ret = fpga_mgr_write_init(mgr, info, NULL, 0);
-	} else {
-		count = min(mgr->mops->initial_header_size, count);
+	else
 		ret = fpga_mgr_write_init(mgr, info, buf, count);
-	}
 
 	if (ret) {
 		dev_err(&mgr->dev, "Error preparing FPGA for writing\n");
@@ -164,39 +290,50 @@ static int fpga_mgr_write_init_buf(struct fpga_manager *mgr,
 	return 0;
 }
 
-static int fpga_mgr_write_init_sg(struct fpga_manager *mgr,
-				  struct fpga_image_info *info,
-				  struct sg_table *sgt)
+static int fpga_mgr_prepare_sg(struct fpga_manager *mgr,
+			       struct fpga_image_info *info,
+			       struct sg_table *sgt)
 {
 	struct sg_mapping_iter miter;
 	size_t len;
 	char *buf;
 	int ret;
 
-	if (!mgr->mops->initial_header_size)
+	/* Short path. Low level driver don't care about image header. */
+	if (!mgr->mops->initial_header_size && !mgr->mops->parse_header)
 		return fpga_mgr_write_init_buf(mgr, info, NULL, 0);
 
 	/*
 	 * First try to use miter to map the first fragment to access the
 	 * header, this is the typical path.
 	 */
-	sg_miter_start(&miter, sgt->sgl, sgt->nents, SG_MITER_FROM_SG);
-	if (sg_miter_next(&miter) &&
-	    miter.length >= mgr->mops->initial_header_size) {
-		ret = fpga_mgr_write_init_buf(mgr, info, miter.addr,
-					      miter.length);
+	ret = fpga_mgr_parse_header_sg_first(mgr, info, sgt);
+	/* If 0, header fits first fragment, call write_init on it */
+	if (!ret) {
+		sg_miter_start(&miter, sgt->sgl, sgt->nents, SG_MITER_FROM_SG);
+		if (sg_miter_next(&miter)) {
+			ret = fpga_mgr_write_init_buf(mgr, info, miter.addr,
+						      miter.length);
+			sg_miter_stop(&miter);
+			return ret;
+		}
 		sg_miter_stop(&miter);
+	/*
+	 * If -EAGAIN, more sg buffer is needed,
+	 * otherwise an error has occurred.
+	 */
+	} else if (ret != -EAGAIN) {
 		return ret;
 	}
-	sg_miter_stop(&miter);
 
-	/* Otherwise copy the fragments into temporary memory. */
-	buf = kmalloc(mgr->mops->initial_header_size, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
+	/*
+	 * Copy the fragments into temporary memory.
+	 * Copying is done inside fpga_mgr_parse_header_sg().
+	 */
+	buf = fpga_mgr_parse_header_sg(mgr, info, sgt, &len);
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
 
-	len = sg_copy_to_buffer(sgt->sgl, sgt->nents, buf,
-				mgr->mops->initial_header_size);
 	ret = fpga_mgr_write_init_buf(mgr, info, buf, len);
 
 	kfree(buf);
@@ -227,7 +364,7 @@ static int fpga_mgr_buf_load_sg(struct fpga_manager *mgr,
 {
 	int ret;
 
-	ret = fpga_mgr_write_init_sg(mgr, info, sgt);
+	ret = fpga_mgr_prepare_sg(mgr, info, sgt);
 	if (ret)
 		return ret;
 
@@ -236,17 +373,35 @@ static int fpga_mgr_buf_load_sg(struct fpga_manager *mgr,
 	if (mgr->mops->write_sg) {
 		ret = fpga_mgr_write_sg(mgr, sgt);
 	} else {
+		size_t length, count = 0, data_size = info->data_size;
 		struct sg_mapping_iter miter;
 
 		sg_miter_start(&miter, sgt->sgl, sgt->nents, SG_MITER_FROM_SG);
+
+		if (mgr->mops->skip_header &&
+		    !sg_miter_skip(&miter, info->header_size)) {
+			ret = -EINVAL;
+			goto out;
+		}
+
 		while (sg_miter_next(&miter)) {
-			ret = fpga_mgr_write(mgr, miter.addr, miter.length);
+			if (data_size)
+				length = min(miter.length, data_size - count);
+			else
+				length = miter.length;
+
+			ret = fpga_mgr_write(mgr, miter.addr, length);
 			if (ret)
 				break;
+
+			count += length;
+			if (data_size && count >= data_size)
+				break;
 		}
 		sg_miter_stop(&miter);
 	}
 
+out:
 	if (ret) {
 		dev_err(&mgr->dev, "Error while writing image data to FPGA\n");
 		mgr->state = FPGA_MGR_STATE_WRITE_ERR;
@@ -262,10 +417,22 @@ static int fpga_mgr_buf_load_mapped(struct fpga_manager *mgr,
 {
 	int ret;
 
+	ret = fpga_mgr_parse_header_mapped(mgr, info, buf, count);
+	if (ret)
+		return ret;
+
 	ret = fpga_mgr_write_init_buf(mgr, info, buf, count);
 	if (ret)
 		return ret;
 
+	if (mgr->mops->skip_header) {
+		buf += info->header_size;
+		count -= info->header_size;
+	}
+
+	if (info->data_size)
+		count = info->data_size;
+
 	/*
 	 * Write the FPGA image to the FPGA.
 	 */
@@ -404,6 +571,8 @@ static int fpga_mgr_firmware_load(struct fpga_manager *mgr,
  */
 int fpga_mgr_load(struct fpga_manager *mgr, struct fpga_image_info *info)
 {
+	info->header_size = mgr->mops->initial_header_size;
+
 	if (info->sgt)
 		return fpga_mgr_buf_load_sg(mgr, info, info->sgt);
 	if (info->buf && info->count)
@@ -424,6 +593,10 @@ static const char * const state_str[] = {
 	[FPGA_MGR_STATE_FIRMWARE_REQ] =		"firmware request",
 	[FPGA_MGR_STATE_FIRMWARE_REQ_ERR] =	"firmware request error",
 
+	/* Parse FPGA image header */
+	[FPGA_MGR_STATE_PARSE_HEADER] =		"parse header",
+	[FPGA_MGR_STATE_PARSE_HEADER_ERR] =	"parse header error",
+
 	/* Preparing FPGA to receive image */
 	[FPGA_MGR_STATE_WRITE_INIT] =		"write init",
 	[FPGA_MGR_STATE_WRITE_INIT_ERR] =	"write init error",
diff --git a/drivers/fpga/microchip-spi.c b/drivers/fpga/microchip-spi.c
new file mode 100644
index 000000000000..bd284c7b8dc9
--- /dev/null
+++ b/drivers/fpga/microchip-spi.c
@@ -0,0 +1,398 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Microchip Polarfire FPGA programming over slave SPI interface.
+ */
+
+#include <asm/unaligned.h>
+#include <linux/delay.h>
+#include <linux/fpga/fpga-mgr.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/spi/spi.h>
+
+#define	MPF_SPI_ISC_ENABLE	0x0B
+#define	MPF_SPI_ISC_DISABLE	0x0C
+#define	MPF_SPI_READ_STATUS	0x00
+#define	MPF_SPI_READ_DATA	0x01
+#define	MPF_SPI_FRAME_INIT	0xAE
+#define	MPF_SPI_FRAME		0xEE
+#define	MPF_SPI_PRG_MODE	0x01
+#define	MPF_SPI_RELEASE		0x23
+
+#define	MPF_SPI_FRAME_SIZE	16
+
+#define	MPF_HEADER_SIZE_OFFSET	24
+#define	MPF_DATA_SIZE_OFFSET	55
+
+#define	MPF_LOOKUP_TABLE_RECORD_SIZE		9
+#define	MPF_LOOKUP_TABLE_BLOCK_ID_OFFSET	0
+#define	MPF_LOOKUP_TABLE_BLOCK_START_OFFSET	1
+
+#define	MPF_COMPONENTS_SIZE_ID	5
+#define	MPF_BITSTREAM_ID	8
+
+#define	MPF_BITS_PER_COMPONENT_SIZE	22
+
+#define	MPF_STATUS_POLL_RETRIES		10000
+#define	MPF_STATUS_BUSY			BIT(0)
+#define	MPF_STATUS_READY		BIT(1)
+#define	MPF_STATUS_SPI_VIOLATION	BIT(2)
+#define	MPF_STATUS_SPI_ERROR		BIT(3)
+
+struct mpf_priv {
+	struct spi_device *spi;
+	bool program_mode;
+};
+
+static int mpf_read_status(struct spi_device *spi)
+{
+	u8 status = 0, status_command = MPF_SPI_READ_STATUS;
+	struct spi_transfer xfers[2] = { 0 };
+	int ret;
+
+	/*
+	 * HW status is returned on MISO in the first byte after CS went
+	 * active. However, first reading can be inadequate, so we submit
+	 * two identical SPI transfers and use result of the later one.
+	 */
+	xfers[0].tx_buf = &status_command;
+	xfers[1].tx_buf = &status_command;
+	xfers[0].rx_buf = &status;
+	xfers[1].rx_buf = &status;
+	xfers[0].len = 1;
+	xfers[1].len = 1;
+	xfers[0].cs_change = 1;
+
+	ret = spi_sync_transfer(spi, xfers, 2);
+
+	if ((status & MPF_STATUS_SPI_VIOLATION) ||
+	    (status & MPF_STATUS_SPI_ERROR))
+		ret = -EIO;
+
+	return ret ? : status;
+}
+
+static enum fpga_mgr_states mpf_ops_state(struct fpga_manager *mgr)
+{
+	struct mpf_priv *priv = mgr->priv;
+	struct spi_device *spi;
+	bool program_mode;
+	int status;
+
+	spi = priv->spi;
+	program_mode = priv->program_mode;
+	status = mpf_read_status(spi);
+
+	if (!program_mode && !status)
+		return FPGA_MGR_STATE_OPERATING;
+
+	return FPGA_MGR_STATE_UNKNOWN;
+}
+
+static int mpf_ops_parse_header(struct fpga_manager *mgr,
+				struct fpga_image_info *info,
+				const char *buf, size_t count)
+{
+	size_t component_size_byte_num, component_size_byte_off,
+	       components_size_start, bitstream_start,
+	       block_id_offset, block_start_offset;
+	u8 header_size, blocks_num, block_id;
+	u32 block_start, component_size;
+	u16 components_num, i;
+
+	if (!buf) {
+		dev_err(&mgr->dev, "Image buffer is not provided\n");
+		return -EINVAL;
+	}
+
+	header_size = *(buf + MPF_HEADER_SIZE_OFFSET);
+	if (header_size > count) {
+		info->header_size = header_size;
+		return -EAGAIN;
+	}
+
+	/*
+	 * Go through look-up table to find out where actual bitstream starts
+	 * and where sizes of components of the bitstream lies.
+	 */
+	blocks_num = *(buf + header_size - 1);
+	block_id_offset = header_size + MPF_LOOKUP_TABLE_BLOCK_ID_OFFSET;
+	block_start_offset = header_size + MPF_LOOKUP_TABLE_BLOCK_START_OFFSET;
+
+	header_size += blocks_num * MPF_LOOKUP_TABLE_RECORD_SIZE;
+	if (header_size > count) {
+		info->header_size = header_size;
+		return -EAGAIN;
+	}
+
+	components_size_start = 0;
+	bitstream_start = 0;
+
+	while (blocks_num--) {
+		block_id = *(buf + block_id_offset);
+		block_start = get_unaligned_le32(buf + block_start_offset);
+
+		switch (block_id) {
+		case MPF_BITSTREAM_ID:
+			bitstream_start = block_start;
+			info->header_size = block_start;
+			if (block_start > count)
+				return -EAGAIN;
+
+			break;
+		case MPF_COMPONENTS_SIZE_ID:
+			components_size_start = block_start;
+			break;
+		default:
+			break;
+		}
+
+		if (bitstream_start && components_size_start)
+			break;
+
+		block_id_offset += MPF_LOOKUP_TABLE_RECORD_SIZE;
+		block_start_offset += MPF_LOOKUP_TABLE_RECORD_SIZE;
+	}
+
+	if (!bitstream_start || !components_size_start) {
+		dev_err(&mgr->dev, "Failed to parse header look-up table\n");
+		return -EFAULT;
+	}
+
+	/*
+	 * Parse bitstream size.
+	 * Sizes of components of the bitstream are 22-bits long placed next
+	 * to each other. Image header should be extended by now up to where
+	 * actual bitstream starts, so no need for overflow check anymore.
+	 */
+	components_num = get_unaligned_le16(buf + MPF_DATA_SIZE_OFFSET);
+
+	for (i = 0; i < components_num; i++) {
+		component_size_byte_num =
+			(i * MPF_BITS_PER_COMPONENT_SIZE) / BITS_PER_BYTE;
+		component_size_byte_off =
+			(i * MPF_BITS_PER_COMPONENT_SIZE) % BITS_PER_BYTE;
+
+		component_size = get_unaligned_le32(buf +
+						    components_size_start +
+						    component_size_byte_num);
+		component_size >>= component_size_byte_off;
+		component_size &= GENMASK(MPF_BITS_PER_COMPONENT_SIZE - 1, 0);
+
+		info->data_size += component_size * MPF_SPI_FRAME_SIZE;
+	}
+
+	return 0;
+}
+
+/* Poll HW status until busy bit is cleared and mask bits are set. */
+static int mpf_poll_status(struct spi_device *spi, u8 mask)
+{
+	int status, retries = MPF_STATUS_POLL_RETRIES;
+
+	while (retries--) {
+		status = mpf_read_status(spi);
+		if (status < 0)
+			return status;
+
+		if (status & MPF_STATUS_BUSY)
+			continue;
+
+		if (!mask || (status & mask))
+			return status;
+	}
+
+	return -EBUSY;
+}
+
+static int mpf_spi_write(struct spi_device *spi, const void *buf, size_t buf_size)
+{
+	int status = mpf_poll_status(spi, 0);
+
+	if (status < 0)
+		return status;
+
+	return spi_write(spi, buf, buf_size);
+}
+
+static int mpf_spi_write_then_read(struct spi_device *spi,
+				   const void *txbuf, size_t txbuf_size,
+				   void *rxbuf, size_t rxbuf_size)
+{
+	const u8 read_command[] = { MPF_SPI_READ_DATA };
+	int ret;
+
+	ret = mpf_spi_write(spi, txbuf, txbuf_size);
+	if (ret)
+		return ret;
+
+	ret = mpf_poll_status(spi, MPF_STATUS_READY);
+	if (ret < 0)
+		return ret;
+
+	return spi_write_then_read(spi, read_command, sizeof(read_command),
+				   rxbuf, rxbuf_size);
+}
+
+static int mpf_ops_write_init(struct fpga_manager *mgr,
+			      struct fpga_image_info *info, const char *buf,
+			      size_t count)
+{
+	const u8 program_mode[] = { MPF_SPI_FRAME_INIT, MPF_SPI_PRG_MODE };
+	const u8 isc_en_command[] = { MPF_SPI_ISC_ENABLE };
+	struct mpf_priv *priv = mgr->priv;
+	struct device *dev = &mgr->dev;
+	struct spi_device *spi;
+	u32 isc_ret = 0;
+	int ret;
+
+	if (info->flags & FPGA_MGR_PARTIAL_RECONFIG) {
+		dev_err(dev, "Partial reconfiguration is not supported\n");
+		return -EOPNOTSUPP;
+	}
+
+	spi = priv->spi;
+
+	ret = mpf_spi_write_then_read(spi, isc_en_command, sizeof(isc_en_command),
+				      &isc_ret, sizeof(isc_ret));
+	if (ret || isc_ret) {
+		dev_err(dev, "Failed to enable ISC: spi_ret %d, isc_ret %u\n",
+			ret, isc_ret);
+		return -EFAULT;
+	}
+
+	ret = mpf_spi_write(spi, program_mode, sizeof(program_mode));
+	if (ret) {
+		dev_err(dev, "Failed to enter program mode: %d\n", ret);
+		return ret;
+	}
+
+	priv->program_mode = true;
+
+	return 0;
+}
+
+static int mpf_ops_write(struct fpga_manager *mgr, const char *buf, size_t count)
+{
+	u8 spi_frame_command[] = { MPF_SPI_FRAME };
+	struct spi_transfer xfers[2] = { 0 };
+	struct mpf_priv *priv = mgr->priv;
+	struct device *dev = &mgr->dev;
+	struct spi_device *spi;
+	int ret, i;
+
+	if (count % MPF_SPI_FRAME_SIZE) {
+		dev_err(dev, "Bitstream size is not a multiple of %d\n",
+			MPF_SPI_FRAME_SIZE);
+		return -EINVAL;
+	}
+
+	spi = priv->spi;
+
+	xfers[0].tx_buf = spi_frame_command;
+	xfers[0].len = sizeof(spi_frame_command);
+
+	for (i = 0; i < count / MPF_SPI_FRAME_SIZE; i++) {
+		xfers[1].tx_buf = buf + i * MPF_SPI_FRAME_SIZE;
+		xfers[1].len = MPF_SPI_FRAME_SIZE;
+
+		ret = mpf_poll_status(spi, 0);
+		if (ret >= 0)
+			ret = spi_sync_transfer(spi, xfers, ARRAY_SIZE(xfers));
+
+		if (ret) {
+			dev_err(dev, "Failed to write bitstream frame %d/%zu\n",
+				i, count / MPF_SPI_FRAME_SIZE);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int mpf_ops_write_complete(struct fpga_manager *mgr,
+				  struct fpga_image_info *info)
+{
+	const u8 isc_dis_command[] = { MPF_SPI_ISC_DISABLE };
+	const u8 release_command[] = { MPF_SPI_RELEASE };
+	struct mpf_priv *priv = mgr->priv;
+	struct device *dev = &mgr->dev;
+	struct spi_device *spi;
+	int ret;
+
+	spi = priv->spi;
+
+	ret = mpf_spi_write(spi, isc_dis_command, sizeof(isc_dis_command));
+	if (ret) {
+		dev_err(dev, "Failed to disable ISC: %d\n", ret);
+		return ret;
+	}
+
+	usleep_range(1000, 2000);
+
+	ret = mpf_spi_write(spi, release_command, sizeof(release_command));
+	if (ret) {
+		dev_err(dev, "Failed to exit program mode: %d\n", ret);
+		return ret;
+	}
+
+	priv->program_mode = false;
+
+	return 0;
+}
+
+static const struct fpga_manager_ops mpf_ops = {
+	.state = mpf_ops_state,
+	.initial_header_size = 71,
+	.skip_header = true,
+	.parse_header = mpf_ops_parse_header,
+	.write_init = mpf_ops_write_init,
+	.write = mpf_ops_write,
+	.write_complete = mpf_ops_write_complete,
+};
+
+static int mpf_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct fpga_manager *mgr;
+	struct mpf_priv *priv;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->spi = spi;
+
+	mgr = devm_fpga_mgr_register(dev, "Microchip Polarfire SPI FPGA Manager",
+				     &mpf_ops, priv);
+
+	return PTR_ERR_OR_ZERO(mgr);
+}
+
+static const struct spi_device_id mpf_spi_ids[] = {
+	{ .name = "mpf-spi-fpga-mgr", },
+	{},
+};
+MODULE_DEVICE_TABLE(spi, mpf_spi_ids);
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id mpf_of_ids[] = {
+	{ .compatible = "microchip,mpf-spi-fpga-mgr" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mpf_of_ids);
+#endif /* IS_ENABLED(CONFIG_OF) */
+
+static struct spi_driver mpf_driver = {
+	.probe = mpf_probe,
+	.id_table = mpf_spi_ids,
+	.driver = {
+		.name = "microchip_mpf_spi_fpga_mgr",
+		.of_match_table = of_match_ptr(mpf_of_ids),
+	},
+};
+
+module_spi_driver(mpf_driver);
+
+MODULE_DESCRIPTION("Microchip Polarfire SPI FPGA Manager");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
index 0f9468771bb9..54f63459efd6 100644
--- a/include/linux/fpga/fpga-mgr.h
+++ b/include/linux/fpga/fpga-mgr.h
@@ -22,6 +22,8 @@ struct sg_table;
  * @FPGA_MGR_STATE_RESET: FPGA in reset state
  * @FPGA_MGR_STATE_FIRMWARE_REQ: firmware request in progress
  * @FPGA_MGR_STATE_FIRMWARE_REQ_ERR: firmware request failed
+ * @FPGA_MGR_STATE_PARSE_HEADER: parse FPGA image header
+ * @FPGA_MGR_STATE_PARSE_HEADER_ERR: Error during PARSE_HEADER stage
  * @FPGA_MGR_STATE_WRITE_INIT: preparing FPGA for programming
  * @FPGA_MGR_STATE_WRITE_INIT_ERR: Error during WRITE_INIT stage
  * @FPGA_MGR_STATE_WRITE: writing image to FPGA
@@ -41,7 +43,9 @@ enum fpga_mgr_states {
 	FPGA_MGR_STATE_FIRMWARE_REQ,
 	FPGA_MGR_STATE_FIRMWARE_REQ_ERR,
 
-	/* write sequence: init, write, complete */
+	/* write sequence: parse header, init, write, complete */
+	FPGA_MGR_STATE_PARSE_HEADER,
+	FPGA_MGR_STATE_PARSE_HEADER_ERR,
 	FPGA_MGR_STATE_WRITE_INIT,
 	FPGA_MGR_STATE_WRITE_INIT_ERR,
 	FPGA_MGR_STATE_WRITE,
@@ -85,6 +89,9 @@ enum fpga_mgr_states {
  * @sgt: scatter/gather table containing FPGA image
  * @buf: contiguous buffer containing FPGA image
  * @count: size of buf
+ * @header_size: size of image header.
+ * @data_size: size of image data to be sent to the device. If not specified,
+ *	whole image will be used. Header may be skipped in either case.
  * @region_id: id of target region
  * @dev: device that owns this
  * @overlay: Device Tree overlay
@@ -98,6 +105,8 @@ struct fpga_image_info {
 	struct sg_table *sgt;
 	const char *buf;
 	size_t count;
+	size_t header_size;
+	size_t data_size;
 	int region_id;
 	struct device *dev;
 #ifdef CONFIG_OF
@@ -137,9 +146,16 @@ struct fpga_manager_info {
 
 /**
  * struct fpga_manager_ops - ops for low level fpga manager drivers
- * @initial_header_size: Maximum number of bytes that should be passed into write_init
+ * @initial_header_size: minimum number of bytes that should be passed into
+ *	parse_header and write_init.
+ * @skip_header: bool flag to tell fpga-mgr core whether it should skip
+ *	info->header_size part at the beginning of the image when invoking
+ *	write callback.
  * @state: returns an enum value of the FPGA's state
  * @status: returns status of the FPGA, including reconfiguration error code
+ * @parse_header: parse FPGA image header to set info->header_size and
+ *	info->data_size. In case the input buffer is not large enough, set
+ *	required size to info->header_size and return -EAGAIN.
  * @write_init: prepare the FPGA to receive configuration data
  * @write: write count bytes of configuration data to the FPGA
  * @write_sg: write the scatter list of configuration data to the FPGA
@@ -153,8 +169,12 @@ struct fpga_manager_info {
  */
 struct fpga_manager_ops {
 	size_t initial_header_size;
+	bool skip_header;
 	enum fpga_mgr_states (*state)(struct fpga_manager *mgr);
 	u64 (*status)(struct fpga_manager *mgr);
+	int (*parse_header)(struct fpga_manager *mgr,
+			    struct fpga_image_info *info,
+			    const char *buf, size_t count);
 	int (*write_init)(struct fpga_manager *mgr,
 			  struct fpga_image_info *info,
 			  const char *buf, size_t count);