diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/hmm.h | 46 |
1 files changed, 21 insertions, 25 deletions
diff --git a/include/linux/hmm.h b/include/linux/hmm.h index dd907f614dfe..54d684fe3b90 100644 --- a/include/linux/hmm.h +++ b/include/linux/hmm.h @@ -80,8 +80,6 @@ struct hmm; /* - * hmm_pfn_t - HMM uses its own pfn type to keep several flags per page - * * Flags: * HMM_PFN_VALID: pfn is valid. It has, at least, read permission. * HMM_PFN_WRITE: CPU page table has write permission set @@ -93,8 +91,6 @@ struct hmm; * set and the pfn value is undefined. * HMM_PFN_DEVICE_UNADDRESSABLE: unaddressable device memory (ZONE_DEVICE) */ -typedef unsigned long hmm_pfn_t; - #define HMM_PFN_VALID (1 << 0) #define HMM_PFN_WRITE (1 << 1) #define HMM_PFN_ERROR (1 << 2) @@ -104,14 +100,14 @@ typedef unsigned long hmm_pfn_t; #define HMM_PFN_SHIFT 6 /* - * hmm_pfn_t_to_page() - return struct page pointed to by a valid hmm_pfn_t - * @pfn: hmm_pfn_t to convert to struct page - * Returns: struct page pointer if pfn is a valid hmm_pfn_t, NULL otherwise + * hmm_pfn_to_page() - return struct page pointed to by a valid HMM pfn + * @pfn: HMM pfn value to get corresponding struct page from + * Returns: struct page pointer if pfn is a valid HMM pfn, NULL otherwise * - * If the hmm_pfn_t is valid (ie valid flag set) then return the struct page - * matching the pfn value stored in the hmm_pfn_t. Otherwise return NULL. + * If the HMM pfn is valid (ie valid flag set) then return the struct page + * matching the pfn value stored in the HMM pfn. Otherwise return NULL. */ -static inline struct page *hmm_pfn_t_to_page(hmm_pfn_t pfn) +static inline struct page *hmm_pfn_to_page(uint64_t pfn) { if (!(pfn & HMM_PFN_VALID)) return NULL; @@ -119,11 +115,11 @@ static inline struct page *hmm_pfn_t_to_page(hmm_pfn_t pfn) } /* - * hmm_pfn_t_to_pfn() - return pfn value store in a hmm_pfn_t - * @pfn: hmm_pfn_t to extract pfn from - * Returns: pfn value if hmm_pfn_t is valid, -1UL otherwise + * hmm_pfn_to_pfn() - return pfn value store in a HMM pfn + * @pfn: HMM pfn value to extract pfn from + * Returns: pfn value if HMM pfn is valid, -1UL otherwise */ -static inline unsigned long hmm_pfn_t_to_pfn(hmm_pfn_t pfn) +static inline unsigned long hmm_pfn_to_pfn(uint64_t pfn) { if (!(pfn & HMM_PFN_VALID)) return -1UL; @@ -131,21 +127,21 @@ static inline unsigned long hmm_pfn_t_to_pfn(hmm_pfn_t pfn) } /* - * hmm_pfn_t_from_page() - create a valid hmm_pfn_t value from struct page - * @page: struct page pointer for which to create the hmm_pfn_t - * Returns: valid hmm_pfn_t for the page + * hmm_pfn_from_page() - create a valid HMM pfn value from struct page + * @page: struct page pointer for which to create the HMM pfn + * Returns: valid HMM pfn for the page */ -static inline hmm_pfn_t hmm_pfn_t_from_page(struct page *page) +static inline uint64_t hmm_pfn_from_page(struct page *page) { return (page_to_pfn(page) << HMM_PFN_SHIFT) | HMM_PFN_VALID; } /* - * hmm_pfn_t_from_pfn() - create a valid hmm_pfn_t value from pfn - * @pfn: pfn value for which to create the hmm_pfn_t - * Returns: valid hmm_pfn_t for the pfn + * hmm_pfn_from_pfn() - create a valid HMM pfn value from pfn + * @pfn: pfn value for which to create the HMM pfn + * Returns: valid HMM pfn for the pfn */ -static inline hmm_pfn_t hmm_pfn_t_from_pfn(unsigned long pfn) +static inline uint64_t hmm_pfn_from_pfn(unsigned long pfn) { return (pfn << HMM_PFN_SHIFT) | HMM_PFN_VALID; } @@ -284,7 +280,7 @@ struct hmm_range { struct list_head list; unsigned long start; unsigned long end; - hmm_pfn_t *pfns; + uint64_t *pfns; bool valid; }; @@ -307,7 +303,7 @@ bool hmm_vma_range_done(struct hmm_range *range); /* * Fault memory on behalf of device driver. Unlike handle_mm_fault(), this will - * not migrate any device memory back to system memory. The hmm_pfn_t array will + * not migrate any device memory back to system memory. The HMM pfn array will * be updated with the fault result and current snapshot of the CPU page table * for the range. * @@ -316,7 +312,7 @@ bool hmm_vma_range_done(struct hmm_range *range); * function returns -EAGAIN. * * Return value does not reflect if the fault was successful for every single - * address or not. Therefore, the caller must to inspect the hmm_pfn_t array to + * address or not. Therefore, the caller must to inspect the HMM pfn array to * determine fault status for each address. * * Trying to fault inside an invalid vma will result in -EINVAL. |