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| author | Eric Dumazet <edumazet@google.com> | 2026-03-02 21:14:26 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-05 03:54:09 +0300 |
| commit | 42a101775bc515a77ac0c39de6cef42aa7abb3a7 (patch) | |
| tree | 55f1aab9c92ea273b766f3afcae99da57dec41b0 /include | |
| parent | c26b8c4e291c55c7b2138d7bcb27348ca3a5ae59 (diff) | |
| download | linux-42a101775bc515a77ac0c39de6cef42aa7abb3a7.tar.xz | |
net: add rps_tag_ptr type and helpers
Add a new rps_tag_ptr type to encode a pointer and a size
to a power-of-two table.
Three helpers are added converting an rps_tag_ptr to:
1) A log of the size.
2) A mask : (size - 1).
3) A pointer to the array.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260302181432.1836150-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/rps-types.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/net/rps-types.h b/include/net/rps-types.h new file mode 100644 index 000000000000..6b90a66866c1 --- /dev/null +++ b/include/net/rps-types.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef _NET_RPS_TYPES_H +#define _NET_RPS_TYPES_H + +/* Define a rps_tag_ptr: + * Low order 5 bits are used to store the ilog2(size) of an RPS table. + */ +typedef unsigned long rps_tag_ptr; + +static inline u8 rps_tag_to_log(rps_tag_ptr tag_ptr) +{ + return tag_ptr & 31U; +} + +static inline u32 rps_tag_to_mask(rps_tag_ptr tag_ptr) +{ + return (1U << rps_tag_to_log(tag_ptr)) - 1; +} + +static inline void *rps_tag_to_table(rps_tag_ptr tag_ptr) +{ + return (void *)(tag_ptr & ~31UL); +} +#endif /* _NET_RPS_TYPES_H */ |