Commit 62ccf2d2 authored by Ian Munsie's avatar Ian Munsie Committed by Michael Ellerman
Browse files

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.

Signed-off-by: default avatarIan Munsie <imunsie@au1.ibm.com>
Reviewed-by: default avatarAndrew Donnellan <andrew.donnellan@au1.ibm.com>
Reviewed-by: default avatarFrederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 48b3adf3

drivers/misc/cxl/base.c

+13 −0
Original line number Original line Diff line number Diff line
@@ -54,6 +54,19 @@ static inline void cxl_calls_put(struct cxl_calls *calls) { } 




#endif /* CONFIG_CXL_MODULE */

#endif /* CONFIG_CXL_MODULE */





/* AFU refcount management */

struct cxl_afu *cxl_afu_get(struct cxl_afu *afu)

{

	return (get_device(&afu->dev) == NULL) ? NULL : afu;

}

EXPORT_SYMBOL_GPL(cxl_afu_get);



void cxl_afu_put(struct cxl_afu *afu)

{

	put_device(&afu->dev);

}

EXPORT_SYMBOL_GPL(cxl_afu_put);



void cxl_slbia(struct mm_struct *mm)

void cxl_slbia(struct mm_struct *mm)

{

{

	struct cxl_calls *calls;

	struct cxl_calls *calls;

drivers/misc/cxl/cxl.h

+0 −12
Original line number Original line Diff line number Diff line
@@ -440,18 +440,6 @@ struct cxl_afu { 
	bool enabled;

	bool enabled;

};

};





/* AFU refcount management */

static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu)

{



	return (get_device(&afu->dev) == NULL) ? NULL : afu;

}



static inline void  cxl_afu_put(struct cxl_afu *afu)

{

	put_device(&afu->dev);

}







struct cxl_irq_name {

struct cxl_irq_name {

	struct list_head list;

	struct list_head list;

include/misc/cxl-base.h

+4 −0
Original line number Original line Diff line number Diff line
@@ -36,11 +36,15 @@ static inline void cxl_ctx_put(void) 
       atomic_dec(&cxl_use_count);

       atomic_dec(&cxl_use_count);

}

}





struct cxl_afu *cxl_afu_get(struct cxl_afu *afu);

void cxl_afu_put(struct cxl_afu *afu);

void cxl_slbia(struct mm_struct *mm);

void cxl_slbia(struct mm_struct *mm);





#else /* CONFIG_CXL_BASE */

#else /* CONFIG_CXL_BASE */





static inline bool cxl_ctx_in_use(void) { return false; }

static inline bool cxl_ctx_in_use(void) { return false; }

static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu) { return NULL; }

static inline void cxl_afu_put(struct cxl_afu *afu) {}

static inline void cxl_slbia(struct mm_struct *mm) {}

static inline void cxl_slbia(struct mm_struct *mm) {}





#endif /* CONFIG_CXL_BASE */

#endif /* CONFIG_CXL_BASE */

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