[PATCH v4 3/5] fpga: pass fpga_manager_update_ops to the fpga_manager_write functions

trix
2021-06-24T21:18:09Z

Refactor fpga_manager_write* functions for reimaging, pass
the update_ops as a parameter. Continue the passing of the update_ops
to the write wrapper functions. Only do the reconfig ops.

Add a wrapper for write_sg, so the update ops are handled consistently.

Signed-off-by: Tom Rix <trix@redhat.com>
---
drivers/fpga/fpga-mgr.c | 94 ++++++++++++++++++++++++++---------------
1 file changed, 59 insertions(+), 35 deletions(-)

diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index 9d17779cac7e3..a785b7dc5dba0 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -42,17 +42,29 @@ static inline u64 fpga_mgr_status(struct fpga_manager *mgr)

static inline int fpga_mgr_write_init(struct fpga_manager *mgr,
struct fpga_image_info *info,
- const char *buf, size_t count)
+ const char *buf, size_t count,
+ const struct fpga_manager_update_ops *uops)
{
- if (mgr->mops && mgr->mops->reconfig.write_init)
- return mgr->mops->reconfig.write_init(mgr, info, buf, count);
+ if (uops && uops->write_init)
+ return uops->write_init(mgr, info, buf, count);
return 0;
}

-static inline int fpga_mgr_write(struct fpga_manager *mgr, const char *buf, size_t count)
+static inline int fpga_mgr_write(struct fpga_manager *mgr,
+ const char *buf, size_t count,
+ const struct fpga_manager_update_ops *uops)
{
- if (mgr->mops && mgr->mops->reconfig.write)
- return mgr->mops->reconfig.write(mgr, buf, count);
+ if (uops && uops->write)
+ return uops->write(mgr, buf, count);
+ return -EOPNOTSUPP;
+}
+
+static inline int fpga_mgr_write_sg(struct fpga_manager *mgr,
+ struct sg_table *sgt,
+ const struct fpga_manager_update_ops *uops)
+{
+ if (uops && uops->write_sg)
+ return uops->write_sg(mgr, sgt);
return -EOPNOTSUPP;
}

@@ -61,13 +73,14 @@ static inline int fpga_mgr_write(struct fpga_manager *mgr, const char *buf, size
* finish and set the FPGA into operating mode.
*/
static inline int fpga_mgr_write_complete(struct fpga_manager *mgr,
- struct fpga_image_info *info)
+ struct fpga_image_info *info,
+ const struct fpga_manager_update_ops *uops)
{
int ret = 0;

mgr->state = FPGA_MGR_STATE_WRITE_COMPLETE;
- if (mgr->mops && mgr->mops->reconfig.write_complete)
- ret = mgr->mops->reconfig.write_complete(mgr, info);
+ if (uops && uops->write_complete)
+ ret = uops->write_complete(mgr, info);
if (ret) {
dev_err(&mgr->dev, "Error after writing image data to FPGA\n");
mgr->state = FPGA_MGR_STATE_WRITE_COMPLETE_ERR;
@@ -136,16 +149,17 @@ EXPORT_SYMBOL_GPL(fpga_image_info_free);
*/
static int fpga_mgr_write_init_buf(struct fpga_manager *mgr,
struct fpga_image_info *info,
- const char *buf, size_t count)
+ const char *buf, size_t count,
+ const struct fpga_manager_update_ops *uops)
{
int ret;

mgr->state = FPGA_MGR_STATE_WRITE_INIT;
if (!mgr->mops->initial_header_size)
- ret = fpga_mgr_write_init(mgr, info, NULL, 0);
+ ret = fpga_mgr_write_init(mgr, info, NULL, 0, uops);
else
ret = fpga_mgr_write_init(
- mgr, info, buf, min(mgr->mops->initial_header_size, count));
+ mgr, info, buf, min(mgr->mops->initial_header_size, count), uops);

if (ret) {
dev_err(&mgr->dev, "Error preparing FPGA for writing\n");
@@ -158,7 +172,8 @@ static int fpga_mgr_write_init_buf(struct fpga_manager *mgr,

static int fpga_mgr_write_init_sg(struct fpga_manager *mgr,
struct fpga_image_info *info,
- struct sg_table *sgt)
+ struct sg_table *sgt,
+ const struct fpga_manager_update_ops *uops)
{
struct sg_mapping_iter miter;
size_t len;
@@ -166,7 +181,7 @@ static int fpga_mgr_write_init_sg(struct fpga_manager *mgr,
int ret;

if (!mgr->mops->initial_header_size)
- return fpga_mgr_write_init_buf(mgr, info, NULL, 0);
+ return fpga_mgr_write_init_buf(mgr, info, NULL, 0, uops);

/*
* First try to use miter to map the first fragment to access the
@@ -176,7 +191,7 @@ static int fpga_mgr_write_init_sg(struct fpga_manager *mgr,
if (sg_miter_next(&miter) &&
miter.length >= mgr->mops->initial_header_size) {
ret = fpga_mgr_write_init_buf(mgr, info, miter.addr,
- miter.length);
+ miter.length, uops);
sg_miter_stop(&miter);
return ret;
}
@@ -189,7 +204,7 @@ static int fpga_mgr_write_init_sg(struct fpga_manager *mgr,

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);
+ ret = fpga_mgr_write_init_buf(mgr, info, buf, len, uops);

kfree(buf);

@@ -201,6 +216,7 @@ static int fpga_mgr_write_init_sg(struct fpga_manager *mgr,
* @mgr: fpga manager
* @info: fpga image specific information
* @sgt: scatterlist table
+ * @uops: which update ops to use
*
* Step the low level fpga manager through the device-specific steps of getting
* an FPGA ready to be configured, writing the image to it, then doing whatever
@@ -215,24 +231,25 @@ static int fpga_mgr_write_init_sg(struct fpga_manager *mgr,
*/
static int fpga_mgr_buf_load_sg(struct fpga_manager *mgr,
struct fpga_image_info *info,
- struct sg_table *sgt)
+ struct sg_table *sgt,
+ const struct fpga_manager_update_ops *uops)
{
int ret;

- ret = fpga_mgr_write_init_sg(mgr, info, sgt);
+ ret = fpga_mgr_write_init_sg(mgr, info, sgt, uops);
if (ret)
return ret;

/* Write the FPGA image to the FPGA. */
mgr->state = FPGA_MGR_STATE_WRITE;
- if (mgr->mops->reconfig.write_sg) {
- ret = mgr->mops->reconfig.write_sg(mgr, sgt);
+ if (uops->write_sg) {
+ ret = fpga_mgr_write_sg(mgr, sgt, uops);
} else {
struct sg_mapping_iter miter;

sg_miter_start(&miter, sgt->sgl, sgt->nents, SG_MITER_FROM_SG);
while (sg_miter_next(&miter)) {
- ret = fpga_mgr_write(mgr, miter.addr, miter.length);
+ ret = fpga_mgr_write(mgr, miter.addr, miter.length, uops);
if (ret)
break;
}
@@ -245,16 +262,17 @@ static int fpga_mgr_buf_load_sg(struct fpga_manager *mgr,
return ret;
}

- return fpga_mgr_write_complete(mgr, info);
+ return fpga_mgr_write_complete(mgr, info, uops);
}

static int fpga_mgr_buf_load_mapped(struct fpga_manager *mgr,
struct fpga_image_info *info,
- const char *buf, size_t count)
+ const char *buf, size_t count,
+ const struct fpga_manager_update_ops *uops)
{
int ret;

- ret = fpga_mgr_write_init_buf(mgr, info, buf, count);
+ ret = fpga_mgr_write_init_buf(mgr, info, buf, count, uops);
if (ret)
return ret;

@@ -262,14 +280,14 @@ static int fpga_mgr_buf_load_mapped(struct fpga_manager *mgr,
* Write the FPGA image to the FPGA.
*/
mgr->state = FPGA_MGR_STATE_WRITE;
- ret = fpga_mgr_write(mgr, buf, count);
+ ret = fpga_mgr_write(mgr, buf, count, uops);
if (ret) {
dev_err(&mgr->dev, "Error while writing image data to FPGA\n");
mgr->state = FPGA_MGR_STATE_WRITE_ERR;
return ret;
}

- return fpga_mgr_write_complete(mgr, info);
+ return fpga_mgr_write_complete(mgr, info, uops);
}

/**
@@ -278,6 +296,7 @@ static int fpga_mgr_buf_load_mapped(struct fpga_manager *mgr,
* @info: fpga image info
* @buf: buffer contain fpga image
* @count: byte count of buf
+ * @uops: which update ops to use
*
* Step the low level fpga manager through the device-specific steps of getting
* an FPGA ready to be configured, writing the image to it, then doing whatever
@@ -288,7 +307,8 @@ static int fpga_mgr_buf_load_mapped(struct fpga_manager *mgr,
*/
static int fpga_mgr_buf_load(struct fpga_manager *mgr,
struct fpga_image_info *info,
- const char *buf, size_t count)
+ const char *buf, size_t count,
+ const struct fpga_manager_update_ops *uops)
{
struct page **pages;
struct sg_table sgt;
@@ -302,8 +322,8 @@ static int fpga_mgr_buf_load(struct fpga_manager *mgr,
* contiguous kernel buffer and the driver doesn't require SG, non-SG
* drivers will still work on the slow path.
*/
- if (mgr->mops->reconfig.write)
- return fpga_mgr_buf_load_mapped(mgr, info, buf, count);
+ if (uops && uops->write)
+ return fpga_mgr_buf_load_mapped(mgr, info, buf, count, uops);

/*
* Convert the linear kernel pointer into a sg_table of pages for use
@@ -338,7 +358,7 @@ static int fpga_mgr_buf_load(struct fpga_manager *mgr,
if (rc)
return rc;

- rc = fpga_mgr_buf_load_sg(mgr, info, &sgt);
+ rc = fpga_mgr_buf_load_sg(mgr, info, &sgt, uops);
sg_free_table(&sgt);

return rc;
@@ -349,6 +369,7 @@ static int fpga_mgr_buf_load(struct fpga_manager *mgr,
* @mgr: fpga manager
* @info: fpga image specific information
* @image_name: name of image file on the firmware search path
+ * @uops: which update ops to use
*
* Request an FPGA image using the firmware class, then write out to the FPGA.
* Update the state before each step to provide info on what step failed if
@@ -360,7 +381,8 @@ static int fpga_mgr_buf_load(struct fpga_manager *mgr,
*/
static int fpga_mgr_firmware_load(struct fpga_manager *mgr,
struct fpga_image_info *info,
- const char *image_name)
+ const char *image_name,
+ const struct fpga_manager_update_ops *uops)
{
struct device *dev = &mgr->dev;
const struct firmware *fw;
@@ -377,7 +399,7 @@ static int fpga_mgr_firmware_load(struct fpga_manager *mgr,
return ret;
}

- ret = fpga_mgr_buf_load(mgr, info, fw->data, fw->size);
+ ret = fpga_mgr_buf_load(mgr, info, fw->data, fw->size, uops);

release_firmware(fw);

@@ -396,12 +418,14 @@ static int fpga_mgr_firmware_load(struct fpga_manager *mgr,
*/
int fpga_mgr_load(struct fpga_manager *mgr, struct fpga_image_info *info)
{
+ const struct fpga_manager_update_ops *uops = &mgr->mops->reconfig;
+
if (info->sgt)
- return fpga_mgr_buf_load_sg(mgr, info, info->sgt);
+ return fpga_mgr_buf_load_sg(mgr, info, info->sgt, uops);
if (info->buf && info->count)
- return fpga_mgr_buf_load(mgr, info, info->buf, info->count);
+ return fpga_mgr_buf_load(mgr, info, info->buf, info->count, uops);
if (info->firmware_name)
- return fpga_mgr_firmware_load(mgr, info, info->firmware_name);
+ return fpga_mgr_firmware_load(mgr, info, info->firmware_name, uops);
return -EINVAL;
}
EXPORT_SYMBOL_GPL(fpga_mgr_load);
--
2.26.3