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62ccf2d2ef
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: Ian Munsie <imunsie@au1.ibm.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/*
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* Copyright 2014 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _MISC_CXL_BASE_H
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#define _MISC_CXL_BASE_H
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#ifdef CONFIG_CXL_BASE
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#define CXL_IRQ_RANGES 4
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struct cxl_irq_ranges {
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irq_hw_number_t offset[CXL_IRQ_RANGES];
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irq_hw_number_t range[CXL_IRQ_RANGES];
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};
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extern atomic_t cxl_use_count;
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static inline bool cxl_ctx_in_use(void)
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{
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return (atomic_read(&cxl_use_count) != 0);
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}
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static inline void cxl_ctx_get(void)
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{
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atomic_inc(&cxl_use_count);
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}
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static inline void cxl_ctx_put(void)
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{
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atomic_dec(&cxl_use_count);
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}
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struct cxl_afu *cxl_afu_get(struct cxl_afu *afu);
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void cxl_afu_put(struct cxl_afu *afu);
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void cxl_slbia(struct mm_struct *mm);
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#else /* CONFIG_CXL_BASE */
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static inline bool cxl_ctx_in_use(void) { return false; }
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static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu) { return NULL; }
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static inline void cxl_afu_put(struct cxl_afu *afu) {}
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static inline void cxl_slbia(struct mm_struct *mm) {}
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#endif /* CONFIG_CXL_BASE */
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#endif
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