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mm: properly implement page locking

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Matheus
2026-07-08 01:37:12 -03:00
parent af30088c0d
commit 1512b2f3c6
14 changed files with 123 additions and 45 deletions
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kernel-src/include/kernel/iovec.h
+4 -2
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@@ -66,10 +66,12 @@ size_t iovec_iterator_read_from_ringbuffer(iovec_iterator_t *iovec_iterator, rin
// NOTE: the iovec can have userspace addresses. in this case, the copy can possibly fail with RINGBUFFER_USER_COPY_FAILED
size_t iovec_iterator_peek_from_ringbuffer(iovec_iterator_t *iovec_iterator, ringbuffer_t *ringbuffer, size_t byte_count, uintmax_t ringbuffer_offset);
// returns the physical address of the next page in the iovec_iterator, adding a reference count while at it
// returns the physical address of the next page in the iovec_iterator, adding a reference count and locking it for DMA.
// The write bool controls whether the hint passed to mm_get_physical_address is a read or write (i.e. reading data from the page or
// writing data to the page)
// sets the page_offset to the offset in the page, page_remaining to the remaining number of bytes in the page and page to the physical address of the page
// if no more pages in iovec_iterator, returns success with page being set to NULL
// fails with EFAULT if the page is not mapped
int iovec_iterator_next_page(iovec_iterator_t *iovec_iterator, size_t *page_offset, size_t *page_remaining, void **page);
int iovec_iterator_next_page(iovec_iterator_t *iovec_iterator, size_t *page_offset, size_t *page_remaining, void **page, bool write);
#endif