diff options
| author | Srujana Challa <schalla@marvell.com> | 2020-11-18 17:14:14 +0530 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-20 11:01:13 -0800 |
| commit | 956fb852181e4e4b16ccad62511e0038d3ed4928 (patch) | |
| tree | 8fa1fc00cf80de08e4a2e4a50c0dafa883cc2fb2 /include/linux/soc/marvell | |
| parent | 1a0058cf0c8f5f7ecb2ef2bfe6cfc004d6598769 (diff) | |
octeontx2-pf: move lmt flush to include/linux/soc
On OcteonTX2 platform CPT instruction enqueue and NIX
packet send are only possible via LMTST operations which
uses LDEOR instruction. This patch moves lmt flush
function from OcteonTX2 nic driver to include/linux/soc
since it will be used by OcteonTX2 CPT and NIC driver for
LMTST.
Signed-off-by: Suheil Chandran <schandran@marvell.com>
Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/soc/marvell')
| -rw-r--r-- | include/linux/soc/marvell/octeontx2/asm.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/soc/marvell/octeontx2/asm.h b/include/linux/soc/marvell/octeontx2/asm.h new file mode 100644 index 000000000000..ae2279fe830a --- /dev/null +++ b/include/linux/soc/marvell/octeontx2/asm.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * Copyright (C) 2020 Marvell. + */ + +#ifndef __SOC_OTX2_ASM_H +#define __SOC_OTX2_ASM_H + +#if defined(CONFIG_ARM64) +/* + * otx2_lmt_flush is used for LMT store operation. + * On octeontx2 platform CPT instruction enqueue and + * NIX packet send are only possible via LMTST + * operations and it uses LDEOR instruction targeting + * the coprocessor address. + */ +#define otx2_lmt_flush(ioaddr) \ +({ \ + u64 result = 0; \ + __asm__ volatile(".cpu generic+lse\n" \ + "ldeor xzr, %x[rf], [%[rs]]" \ + : [rf]"=r" (result) \ + : [rs]"r" (ioaddr)); \ + (result); \ +}) +#else +#define otx2_lmt_flush(ioaddr) ({ 0; }) +#endif + +#endif /* __SOC_OTX2_ASM_H */ |