diff options
| author | Marek Vasut <marek.vasut@gmail.com> | 2020-04-04 12:45:02 +0200 |
|---|---|---|
| committer | Peng Fan <peng.fan@nxp.com> | 2020-04-22 20:41:56 +0800 |
| commit | 8074ffe335bad50ffcc3d70ed1d9f3e3ffde9149 (patch) | |
| tree | 016e4e1adaae8fa91b68d99a262606692f1b220b /common/bouncebuf.c | |
| parent | 453d21381bda4452937a6d3c648230805b528b9b (diff) | |
common: bouncebuf: Permit passing custom alignment check function
Add extended version of the bounce_buffer_start(), which permits passing in
a custom alignment checker function for the buffer. This is useful e.g. on
systems with various DMA restrictions and where the checker function might
be more complex than a simple CPU cache alignment check.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'common/bouncebuf.c')
| -rw-r--r-- | common/bouncebuf.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/common/bouncebuf.c b/common/bouncebuf.c index 614eb36c78..0ace152b98 100644 --- a/common/bouncebuf.c +++ b/common/bouncebuf.c @@ -31,17 +31,19 @@ static int addr_aligned(struct bounce_buffer *state) return 1; } -int bounce_buffer_start(struct bounce_buffer *state, void *data, - size_t len, unsigned int flags) +int bounce_buffer_start_extalign(struct bounce_buffer *state, void *data, + size_t len, unsigned int flags, + size_t alignment, + int (*addr_is_aligned)(struct bounce_buffer *state)) { state->user_buffer = data; state->bounce_buffer = data; state->len = len; - state->len_aligned = roundup(len, ARCH_DMA_MINALIGN); + state->len_aligned = roundup(len, alignment); state->flags = flags; - if (!addr_aligned(state)) { - state->bounce_buffer = memalign(ARCH_DMA_MINALIGN, + if (!addr_is_aligned(state)) { + state->bounce_buffer = memalign(alignment, state->len_aligned); if (!state->bounce_buffer) return -ENOMEM; @@ -62,6 +64,14 @@ int bounce_buffer_start(struct bounce_buffer *state, void *data, return 0; } +int bounce_buffer_start(struct bounce_buffer *state, void *data, + size_t len, unsigned int flags) +{ + return bounce_buffer_start_extalign(state, data, len, flags, + ARCH_DMA_MINALIGN, + addr_aligned); +} + int bounce_buffer_stop(struct bounce_buffer *state) { if (state->flags & GEN_BB_WRITE) { |