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Subject[PATCH v4 09/18] fpga: region: use image info as parameter for programming region
Date
Use FPGA image info (region->info) when region code is
programming the FPGA to pass in multiple parameters.

This is a baby step in refactoring the FPGA region code to
separate out common FPGA region code from FPGA region
Device Tree overlay support.

Signed-off-by: Alan Tull <atull@kernel.org>
---
v2: split out from another patch
v3: change API to use the region->info, remove info param
remove check for region->info, not needed
v4: no change to this patch in this version of patchset
---
drivers/fpga/fpga-region.c | 16 +++++++++-------
include/linux/fpga/fpga-mgr.h | 4 ++++
2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c
index 35af952..eaacf50 100644
--- a/drivers/fpga/fpga-region.c
+++ b/drivers/fpga/fpga-region.c
@@ -223,14 +223,13 @@ static int fpga_region_get_bridges(struct fpga_region *region,
/**
* fpga_region_program_fpga - program FPGA
* @region: FPGA region
- * @overlay: device node of the overlay
- * Program an FPGA using information in the region's fpga image info.
+ * Program an FPGA using fpga image info (region->info).
* Return 0 for success or negative error code.
*/
-static int fpga_region_program_fpga(struct fpga_region *region,
- struct device_node *overlay)
+static int fpga_region_program_fpga(struct fpga_region *region)
{
struct device *dev = &region->dev;
+ struct fpga_image_info *info = region->info;
int ret;

region = fpga_region_get(region);
@@ -245,7 +244,7 @@ static int fpga_region_program_fpga(struct fpga_region *region,
goto err_put_region;
}

- ret = fpga_region_get_bridges(region, overlay);
+ ret = fpga_region_get_bridges(region, info->overlay);
if (ret) {
dev_err(dev, "failed to get FPGA bridges\n");
goto err_unlock_mgr;
@@ -257,7 +256,7 @@ static int fpga_region_program_fpga(struct fpga_region *region,
goto err_put_br;
}

- ret = fpga_mgr_load(region->mgr, region->info);
+ ret = fpga_mgr_load(region->mgr, info);
if (ret) {
dev_err(dev, "failed to load FPGA image\n");
goto err_put_br;
@@ -373,6 +372,8 @@ static int fpga_region_notify_pre_apply(struct fpga_region *region,
if (!info)
return -ENOMEM;

+ info->overlay = nd->overlay;
+
/* Read FPGA region properties from the overlay */
if (of_property_read_bool(nd->overlay, "partial-fpga-config"))
info->flags |= FPGA_MGR_PARTIAL_RECONFIG;
@@ -421,7 +422,8 @@ static int fpga_region_notify_pre_apply(struct fpga_region *region,
}

region->info = info;
- ret = fpga_region_program_fpga(region, nd->overlay);
+
+ ret = fpga_region_program_fpga(region);
if (ret) {
fpga_image_info_free(info);
region->info = NULL;
diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
index 5e2b36e..6977a6b02 100644
--- a/include/linux/fpga/fpga-mgr.h
+++ b/include/linux/fpga/fpga-mgr.h
@@ -89,6 +89,7 @@ enum fpga_mgr_states {
* @buf: contiguous buffer containing FPGA image
* @count: size of buf
* @dev: device that owns this
+ * @overlay: Device Tree overlay
*/
struct fpga_image_info {
u32 flags;
@@ -100,6 +101,9 @@ struct fpga_image_info {
const char *buf;
size_t count;
struct device *dev;
+#ifdef CONFIG_OF
+ struct device_node *overlay;
+#endif
};

/**
--
2.7.4
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