History

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
  1. drivers/misc/cxl/base.c +13 −0
  2. drivers/misc/cxl/cxl.h +0 −12
  3. 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#endif /* CONFIG_CXL_MODULE */55#endif /* CONFIG_CXL_MODULE */
56 56
57/* AFU refcount management */
58struct cxl_afu *cxl_afu_get(struct cxl_afu *afu)
59{
60 return (get_device(&afu->dev) == NULL) ? NULL : afu;
61}
62EXPORT_SYMBOL_GPL(cxl_afu_get);
63
64void cxl_afu_put(struct cxl_afu *afu)
65{
66 put_device(&afu->dev);
67}
68EXPORT_SYMBOL_GPL(cxl_afu_put);
69
57void cxl_slbia(struct mm_struct *mm)70void cxl_slbia(struct mm_struct *mm)
58{71{
59 struct cxl_calls *calls;72 struct cxl_calls *calls;
drivers/misc/cxl/cxl.h+0−12
@@ -440,18 +440,6 @@ struct cxl_afu { · 439 unmodified lines
440 bool enabled;440 bool enabled;
441};441};
442 442
443/* AFU refcount management */
444static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu)
445{
446
447 return (get_device(&afu->dev) == NULL) ? NULL : afu;
448}
449
450static inline void cxl_afu_put(struct cxl_afu *afu)
451{
452 put_device(&afu->dev);
453}
454
455 443
456struct cxl_irq_name {444struct cxl_irq_name {
457 struct list_head list;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 atomic_dec(&cxl_use_count);36 atomic_dec(&cxl_use_count);
37}37}
38 38
39struct cxl_afu *cxl_afu_get(struct cxl_afu *afu);
40void cxl_afu_put(struct cxl_afu *afu);
39void cxl_slbia(struct mm_struct *mm);41void cxl_slbia(struct mm_struct *mm);
40 42
41#else /* CONFIG_CXL_BASE */43#else /* CONFIG_CXL_BASE */
42 44
43static inline bool cxl_ctx_in_use(void) { return false; }45static inline bool cxl_ctx_in_use(void) { return false; }
46static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu) { return NULL; }
47static inline void cxl_afu_put(struct cxl_afu *afu) {}
44static inline void cxl_slbia(struct mm_struct *mm) {}48static inline void cxl_slbia(struct mm_struct *mm) {}
45 49
46#endif /* CONFIG_CXL_BASE */50#endif /* CONFIG_CXL_BASE */