[PATCH v5 04/28] fpga: mgr: add compat_id support

Wu Hao
2018-05-02T02:50:07Z

This patch introduces compat_id support to fpga manager, it adds
a fpga_compat_id pointer to fpga manager data structure to allow
fpga manager drivers to save the compatibility id. This compat_id
could be used for compatibility checking before doing partial
reconfiguration to associated fpga regions.

Signed-off-by: Wu Hao <hao.wu@intel.com>
---
include/linux/fpga/fpga-mgr.h | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
index 802eac8..f163f22 100644
--- a/include/linux/fpga/fpga-mgr.h
+++ b/include/linux/fpga/fpga-mgr.h
@@ -147,11 +147,23 @@ struct fpga_manager_ops {
#define FPGA_MGR_STATUS_FIFO_OVERFLOW_ERR BIT(4)

/**
+ * struct fpga_compat_id - id for compatibility check
+ *
+ * @id_h: high 64bit of the compat_id
+ * @id_l: low 64bit of the compat_id
+ */
+struct fpga_compat_id {
+ u64 id_h;
+ u64 id_l;
+};
+
+/**
* struct fpga_manager - fpga manager structure
* @name: name of low level fpga manager
* @dev: fpga manager device
* @ref_mutex: only allows one reference to fpga manager
* @state: state of fpga manager
+ * @compat_id: FPGA manager id for compatibility check.
* @mops: pointer to struct of fpga manager ops
* @priv: low level driver private date
*/
@@ -160,6 +172,7 @@ struct fpga_manager {
struct device dev;
struct mutex ref_mutex;
enum fpga_mgr_states state;
+ struct fpga_compat_id *compat_id;
const struct fpga_manager_ops *mops;
void *priv;
};
--
1.8.3.1