diff mbox series

[v3,02/26] netmem: Add utility functions

Message ID 20230111042214.907030-3-willy@infradead.org (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series Split netmem from struct page | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-PR success PR summary
bpf/vmtest-bpf-next-VM_Test-1 success Logs for ShellCheck
bpf/vmtest-bpf-next-VM_Test-7 success Logs for llvm-toolchain
bpf/vmtest-bpf-next-VM_Test-8 success Logs for set-matrix
bpf/vmtest-bpf-next-VM_Test-2 success Logs for build for aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-3 success Logs for build for aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-5 success Logs for build for x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-6 success Logs for build for x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-4 success Logs for build for s390x with gcc
bpf/vmtest-bpf-next-VM_Test-34 success Logs for test_verifier on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-9 success Logs for test_maps on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-10 success Logs for test_maps on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-12 success Logs for test_maps on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-13 success Logs for test_maps on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-14 success Logs for test_progs on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-15 success Logs for test_progs on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-17 success Logs for test_progs on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-18 success Logs for test_progs on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-19 fail Logs for test_progs_no_alu32 on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-20 success Logs for test_progs_no_alu32 on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-22 success Logs for test_progs_no_alu32 on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-23 success Logs for test_progs_no_alu32 on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-24 success Logs for test_progs_no_alu32_parallel on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-25 success Logs for test_progs_no_alu32_parallel on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-26 success Logs for test_progs_no_alu32_parallel on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-27 success Logs for test_progs_no_alu32_parallel on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-28 success Logs for test_progs_no_alu32_parallel on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-29 success Logs for test_progs_parallel on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-30 success Logs for test_progs_parallel on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-32 success Logs for test_progs_parallel on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-33 success Logs for test_progs_parallel on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-35 success Logs for test_verifier on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-36 success Logs for test_verifier on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-37 success Logs for test_verifier on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-38 success Logs for test_verifier on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-16 success Logs for test_progs on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-21 success Logs for test_progs_no_alu32 on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-31 success Logs for test_progs_parallel on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-11 success Logs for test_maps on s390x with gcc
netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cover_letter success Series has a cover letter
netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 5339 this patch: 5339
netdev/cc_maintainers warning 4 maintainers not CCed: edumazet@google.com davem@davemloft.net pabeni@redhat.com kuba@kernel.org
netdev/build_clang success Errors and warnings before: 1085 this patch: 1085
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 5553 this patch: 5553
netdev/checkpatch fail CHECK: spaces preferred around that '*' (ctx:WxO) ERROR: spaces required around that ':' (ctx:OxW) WARNING: Do not crash the kernel unless it is absolutely unavoidable--use WARN_ON_ONCE() plus recovery code (if feasible) instead of BUG() or variants
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Matthew Wilcox Jan. 11, 2023, 4:21 a.m. UTC 
netmem_page() is defined this way to preserve constness.  page_netmem()
doesn't call compound_head() because netmem users always use the head
page; it does include a debugging assert to check that it's true.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
---
 include/net/page_pool.h | 59 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
diff mbox series

Patch

diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index cbea4df54918..414907e67ff6 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -96,6 +96,65 @@  NETMEM_MATCH(_refcount, _refcount);
 #undef NETMEM_MATCH
 static_assert(sizeof(struct netmem) <= sizeof(struct page));
 
+#define netmem_page(nmem) (_Generic((nmem),				\
+	const struct netmem *:	(const struct page *)nmem,		\
+	struct netmem *:	(struct page *)nmem))
+
+static inline struct netmem *page_netmem(struct page *page)
+{
+	VM_BUG_ON_PAGE(PageTail(page), page);
+	return (struct netmem *)page;
+}
+
+static inline unsigned long netmem_pfn(const struct netmem *nmem)
+{
+	return page_to_pfn(netmem_page(nmem));
+}
+
+static inline unsigned long netmem_nid(const struct netmem *nmem)
+{
+	return page_to_nid(netmem_page(nmem));
+}
+
+static inline struct netmem *virt_to_netmem(const void *x)
+{
+	return page_netmem(virt_to_head_page(x));
+}
+
+static inline void *netmem_to_virt(const struct netmem *nmem)
+{
+	return page_to_virt(netmem_page(nmem));
+}
+
+static inline void *netmem_address(const struct netmem *nmem)
+{
+	return page_address(netmem_page(nmem));
+}
+
+static inline int netmem_ref_count(const struct netmem *nmem)
+{
+	return page_ref_count(netmem_page(nmem));
+}
+
+static inline void netmem_get(struct netmem *nmem)
+{
+	struct folio *folio = (struct folio *)nmem;
+
+	folio_get(folio);
+}
+
+static inline void netmem_put(struct netmem *nmem)
+{
+	struct folio *folio = (struct folio *)nmem;
+
+	folio_put(folio);
+}
+
+static inline bool netmem_is_pfmemalloc(const struct netmem *nmem)
+{
+	return nmem->pp_magic & BIT(1);
+}
+
 /*
  * Fast allocation side cache array/stack
  *