On 11/30/2021 5:45 AM, Ashwin Sekhar T K wrote:
Before issuing the batch alloc, we clear the first word of cache lines so that NPA can update the status. Make sure that this line clear is flushed before the batch alloc is issued.Signed-off-by: Ashwin Sekhar T K <asek...@marvell.com> --- drivers/common/cnxk/roc_io.h | 12 ++++++++++++ drivers/common/cnxk/roc_io_generic.h | 9 +++++++++ drivers/common/cnxk/roc_npa.h | 2 +- 3 files changed, 22 insertions(+), 1 deletion(-) diff --git a/drivers/common/cnxk/roc_io.h b/drivers/common/cnxk/roc_io.h index fe5f7f46d0..4f15503c29 100644 --- a/drivers/common/cnxk/roc_io.h +++ b/drivers/common/cnxk/roc_io.h @@ -78,6 +78,18 @@ roc_atomic64_cas(uint64_t compare, uint64_t swap, int64_t *ptr) return compare; }+static __plt_always_inline uint64_t+roc_atomic64_casl(uint64_t compare, uint64_t swap, int64_t *ptr) +{ + asm volatile(PLT_CPU_FEATURE_PREAMBLE + "casl %[compare], %[swap], [%[ptr]]\n" + : [compare] "+r"(compare) + : [swap] "r"(swap), [ptr] "r"(ptr) + : "memory"); +
out of curiosity, what is the "cas with release semantics"? briefly, what is the difference between 'cas' and 'casl'?
