cxl: Move cxl_afu_get / cxl_afu_put to base

The Mellanox CX4 uses a model where the AFU is one physical function of the device, and is used by other peer physical functions of the same device. This will require those other devices to grab a reference on the AFU when they are initialised to make sure that it does not go away during their lifetime. Move the AFU refcount functions to base.c so they can be called from the PHB code.

Ian Munsie committed 10 years ago

Commit 62ccf2d1 parent 48b3adf3 files · +17 −12Browse files

Unified · Split

3 files

drivers/misc/cxl/base.c +13 −0
drivers/misc/cxl/cxl.h +0 −12
include/misc/cxl-base.h +4 −0

drivers/misc/cxl/base.c+13−0

@@ -54,6 +54,19 @@ static inline void cxl_calls_put(struct cxl_calls *calls) { } · 53 unmodified lines
54	54
55	55	#endif /* CONFIG_CXL_MODULE */
56	56
	57	+/* AFU refcount management */
	58	+struct cxl_afu cxl_afu_get(struct cxl_afu afu)
	59	+{
	60	+ return (get_device(&afu->dev) == NULL) ? NULL : afu;
	61	+}
	62	+EXPORT_SYMBOL_GPL(cxl_afu_get);
	63	+
	64	+void cxl_afu_put(struct cxl_afu *afu)
	65	+{
	66	+ put_device(&afu->dev);
	67	+}
	68	+EXPORT_SYMBOL_GPL(cxl_afu_put);
	69	+
57	70	void cxl_slbia(struct mm_struct *mm)
58	71	{
59	72	struct cxl_calls *calls;

drivers/misc/cxl/cxl.h+0−12

@@ -440,18 +440,6 @@ struct cxl_afu { · 439 unmodified lines
440	440	bool enabled;
441	441	};
442	442
443		−/* AFU refcount management */
444		−static inline struct cxl_afu cxl_afu_get(struct cxl_afu afu)
445		−{
446		−
447		− return (get_device(&afu->dev) == NULL) ? NULL : afu;
448		−}
449		−
450		−static inline void cxl_afu_put(struct cxl_afu *afu)
451		−{
452		− put_device(&afu->dev);
453		−}
454		−
455	443
456	444	struct cxl_irq_name {
457	445	struct list_head list;

include/misc/cxl-base.h+4−0

@@ -36,11 +36,15 @@ static inline void cxl_ctx_put(void) · 35 unmodified lines
36	36	atomic_dec(&cxl_use_count);
37	37	}
38	38
	39	+struct cxl_afu cxl_afu_get(struct cxl_afu afu);
	40	+void cxl_afu_put(struct cxl_afu *afu);
39	41	void cxl_slbia(struct mm_struct *mm);
40	42
41	43	#else /* CONFIG_CXL_BASE */
42	44
43	45	static inline bool cxl_ctx_in_use(void) { return false; }
	46	+static inline struct cxl_afu cxl_afu_get(struct cxl_afu afu) { return NULL; }
	47	+static inline void cxl_afu_put(struct cxl_afu *afu) {}
44	48	static inline void cxl_slbia(struct mm_struct *mm) {}
45	49
46	50	#endif /* CONFIG_CXL_BASE */