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path: root/drivers/fpga/fpga-mgr.c
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Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
-rw-r--r--drivers/fpga/fpga-mgr.c123
1 files changed, 94 insertions, 29 deletions
diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index 188ffefa3cc3..9939d2cbc9a6 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -2,6 +2,7 @@
* FPGA Manager Core
*
* Copyright (C) 2013-2015 Altera Corporation
+ * Copyright (C) 2017 Intel Corporation
*
* With code from the mailing list:
* Copyright (C) 2013 Xilinx, Inc.
@@ -31,6 +32,40 @@
static DEFINE_IDA(fpga_mgr_ida);
static struct class *fpga_mgr_class;
+struct fpga_image_info *fpga_image_info_alloc(struct device *dev)
+{
+ struct fpga_image_info *info;
+
+ get_device(dev);
+
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ put_device(dev);
+ return NULL;
+ }
+
+ info->dev = dev;
+
+ return info;
+}
+EXPORT_SYMBOL_GPL(fpga_image_info_alloc);
+
+void fpga_image_info_free(struct fpga_image_info *info)
+{
+ struct device *dev;
+
+ if (!info)
+ return;
+
+ dev = info->dev;
+ if (info->firmware_name)
+ devm_kfree(dev, info->firmware_name);
+
+ devm_kfree(dev, info);
+ put_device(dev);
+}
+EXPORT_SYMBOL_GPL(fpga_image_info_free);
+
/*
* 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
@@ -137,8 +172,9 @@ static int fpga_mgr_write_complete(struct fpga_manager *mgr,
*
* Return: 0 on success, negative error code otherwise.
*/
-int fpga_mgr_buf_load_sg(struct fpga_manager *mgr, struct fpga_image_info *info,
- struct sg_table *sgt)
+static int fpga_mgr_buf_load_sg(struct fpga_manager *mgr,
+ struct fpga_image_info *info,
+ struct sg_table *sgt)
{
int ret;
@@ -170,7 +206,6 @@ int fpga_mgr_buf_load_sg(struct fpga_manager *mgr, struct fpga_image_info *info,
return fpga_mgr_write_complete(mgr, info);
}
-EXPORT_SYMBOL_GPL(fpga_mgr_buf_load_sg);
static int fpga_mgr_buf_load_mapped(struct fpga_manager *mgr,
struct fpga_image_info *info,
@@ -210,8 +245,9 @@ static int fpga_mgr_buf_load_mapped(struct fpga_manager *mgr,
*
* Return: 0 on success, negative error code otherwise.
*/
-int fpga_mgr_buf_load(struct fpga_manager *mgr, struct fpga_image_info *info,
- const char *buf, size_t count)
+static int fpga_mgr_buf_load(struct fpga_manager *mgr,
+ struct fpga_image_info *info,
+ const char *buf, size_t count)
{
struct page **pages;
struct sg_table sgt;
@@ -266,7 +302,6 @@ int fpga_mgr_buf_load(struct fpga_manager *mgr, struct fpga_image_info *info,
return rc;
}
-EXPORT_SYMBOL_GPL(fpga_mgr_buf_load);
/**
* fpga_mgr_firmware_load - request firmware and load to fpga
@@ -282,9 +317,9 @@ EXPORT_SYMBOL_GPL(fpga_mgr_buf_load);
*
* Return: 0 on success, negative error code otherwise.
*/
-int fpga_mgr_firmware_load(struct fpga_manager *mgr,
- struct fpga_image_info *info,
- const char *image_name)
+static int fpga_mgr_firmware_load(struct fpga_manager *mgr,
+ struct fpga_image_info *info,
+ const char *image_name)
{
struct device *dev = &mgr->dev;
const struct firmware *fw;
@@ -307,7 +342,18 @@ int fpga_mgr_firmware_load(struct fpga_manager *mgr,
return ret;
}
-EXPORT_SYMBOL_GPL(fpga_mgr_firmware_load);
+
+int fpga_mgr_load(struct fpga_manager *mgr, struct fpga_image_info *info)
+{
+ if (info->sgt)
+ return fpga_mgr_buf_load_sg(mgr, info, info->sgt);
+ if (info->buf && info->count)
+ return fpga_mgr_buf_load(mgr, info, info->buf, info->count);
+ if (info->firmware_name)
+ return fpga_mgr_firmware_load(mgr, info, info->firmware_name);
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(fpga_mgr_load);
static const char * const state_str[] = {
[FPGA_MGR_STATE_UNKNOWN] = "unknown",
@@ -364,28 +410,17 @@ ATTRIBUTE_GROUPS(fpga_mgr);
static struct fpga_manager *__fpga_mgr_get(struct device *dev)
{
struct fpga_manager *mgr;
- int ret = -ENODEV;
mgr = to_fpga_manager(dev);
- if (!mgr)
- goto err_dev;
-
- /* Get exclusive use of fpga manager */
- if (!mutex_trylock(&mgr->ref_mutex)) {
- ret = -EBUSY;
- goto err_dev;
- }
if (!try_module_get(dev->parent->driver->owner))
- goto err_ll_mod;
+ goto err_dev;
return mgr;
-err_ll_mod:
- mutex_unlock(&mgr->ref_mutex);
err_dev:
put_device(dev);
- return ERR_PTR(ret);
+ return ERR_PTR(-ENODEV);
}
static int fpga_mgr_dev_match(struct device *dev, const void *data)
@@ -394,10 +429,10 @@ static int fpga_mgr_dev_match(struct device *dev, const void *data)
}
/**
- * fpga_mgr_get - get an exclusive reference to a fpga mgr
+ * fpga_mgr_get - get a reference to a fpga mgr
* @dev: parent device that fpga mgr was registered with
*
- * Given a device, get an exclusive reference to a fpga mgr.
+ * Given a device, get a reference to a fpga mgr.
*
* Return: fpga manager struct or IS_ERR() condition containing error code.
*/
@@ -418,10 +453,10 @@ static int fpga_mgr_of_node_match(struct device *dev, const void *data)
}
/**
- * of_fpga_mgr_get - get an exclusive reference to a fpga mgr
+ * of_fpga_mgr_get - get a reference to a fpga mgr
* @node: device node
*
- * Given a device node, get an exclusive reference to a fpga mgr.
+ * Given a device node, get a reference to a fpga mgr.
*
* Return: fpga manager struct or IS_ERR() condition containing error code.
*/
@@ -445,12 +480,41 @@ EXPORT_SYMBOL_GPL(of_fpga_mgr_get);
void fpga_mgr_put(struct fpga_manager *mgr)
{
module_put(mgr->dev.parent->driver->owner);
- mutex_unlock(&mgr->ref_mutex);
put_device(&mgr->dev);
}
EXPORT_SYMBOL_GPL(fpga_mgr_put);
/**
+ * fpga_mgr_lock - Lock FPGA manager for exclusive use
+ * @mgr: fpga manager
+ *
+ * Given a pointer to FPGA Manager (from fpga_mgr_get() or
+ * of_fpga_mgr_put()) attempt to get the mutex.
+ *
+ * Return: 0 for success or -EBUSY
+ */
+int fpga_mgr_lock(struct fpga_manager *mgr)
+{
+ if (!mutex_trylock(&mgr->ref_mutex)) {
+ dev_err(&mgr->dev, "FPGA manager is in use.\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fpga_mgr_lock);
+
+/**
+ * fpga_mgr_unlock - Unlock FPGA manager
+ * @mgr: fpga manager
+ */
+void fpga_mgr_unlock(struct fpga_manager *mgr)
+{
+ mutex_unlock(&mgr->ref_mutex);
+}
+EXPORT_SYMBOL_GPL(fpga_mgr_unlock);
+
+/**
* fpga_mgr_register - register a low level fpga manager driver
* @dev: fpga manager device from pdev
* @name: fpga manager name
@@ -503,6 +567,7 @@ int fpga_mgr_register(struct device *dev, const char *name,
device_initialize(&mgr->dev);
mgr->dev.class = fpga_mgr_class;
+ mgr->dev.groups = mops->groups;
mgr->dev.parent = dev;
mgr->dev.of_node = dev->of_node;
mgr->dev.id = id;
@@ -578,7 +643,7 @@ static void __exit fpga_mgr_class_exit(void)
ida_destroy(&fpga_mgr_ida);
}
-MODULE_AUTHOR("Alan Tull <atull@opensource.altera.com>");
+MODULE_AUTHOR("Alan Tull <atull@kernel.org>");
MODULE_DESCRIPTION("FPGA manager framework");
MODULE_LICENSE("GPL v2");