[RFC,04/12] lpm: add support for s390x architecture
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Commit Message
Add big endian support for s390x architecture.
Signed-off-by: Vivian Kong <vivkong@ca.ibm.com>
---
lib/librte_lpm/Makefile | 2 +
lib/librte_lpm/meson.build | 2 +-
lib/librte_lpm/rte_lpm.h | 2 +
lib/librte_lpm/rte_lpm6.c | 26 ++++++-
lib/librte_lpm/rte_lpm_s390x.h | 130 +++++++++++++++++++++++++++++++++
5 files changed, 157 insertions(+), 5 deletions(-)
create mode 100644 lib/librte_lpm/rte_lpm_s390x.h
@@ -26,6 +26,8 @@ else ifeq ($(CONFIG_RTE_ARCH_X86),y)
SYMLINK-$(CONFIG_RTE_LIBRTE_LPM)-include += rte_lpm_sse.h
else ifeq ($(CONFIG_RTE_ARCH_PPC_64),y)
SYMLINK-$(CONFIG_RTE_LIBRTE_LPM)-include += rte_lpm_altivec.h
+else ifeq ($(CONFIG_RTE_ARCH_S390X),y)
+SYMLINK-$(CONFIG_RTE_LIBRTE_LPM)-include += rte_lpm_s390x.h
endif
include $(RTE_SDK)/mk/rte.lib.mk
@@ -6,5 +6,5 @@ sources = files('rte_lpm.c', 'rte_lpm6.c')
headers = files('rte_lpm.h', 'rte_lpm6.h')
# since header files have different names, we can install all vector headers
# without worrying about which architecture we actually need
-headers += files('rte_lpm_altivec.h', 'rte_lpm_neon.h', 'rte_lpm_sse.h')
+headers += files('rte_lpm_s390x.h', 'rte_lpm_altivec.h', 'rte_lpm_neon.h', 'rte_lpm_sse.h')
deps += ['hash']
@@ -459,6 +459,8 @@ rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
#include "rte_lpm_neon.h"
#elif defined(RTE_ARCH_PPC_64)
#include "rte_lpm_altivec.h"
+#elif defined(RTE_ARCH_S390X)
+#include "rte_lpm_s390x.h"
#else
#include "rte_lpm_sse.h"
#endif
@@ -1,6 +1,7 @@
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
+
#include <string.h>
#include <stdint.h>
#include <errno.h>
@@ -24,6 +25,7 @@
#include <rte_hash.h>
#include <assert.h>
#include <rte_jhash.h>
+#include <rte_byteorder.h>
#include "rte_lpm6.h"
@@ -58,17 +60,33 @@ static struct rte_tailq_elem rte_lpm6_tailq = {
};
EAL_REGISTER_TAILQ(rte_lpm6_tailq)
+#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
+
/** Tbl entry structure. It is the same for both tbl24 and tbl8 */
struct rte_lpm6_tbl_entry {
- uint32_t next_hop: 21; /**< Next hop / next table to be checked. */
- uint32_t depth :8; /**< Rule depth. */
+ uint32_t next_hop :21; /**< Next hop / next table to be checked. */
+ uint32_t depth :8; /**< Rule depth. */
+
+ /* Flags. */
+ uint32_t valid :1; /**< Validation flag. */
+ uint32_t valid_group :1; /**< Group validation flag. */
+ uint32_t ext_entry :1; /**< External entry. */
+};
+
+#else
+struct rte_lpm6_tbl_entry {
/* Flags. */
- uint32_t valid :1; /**< Validation flag. */
+ uint32_t ext_entry :1; /**< External entry. */
uint32_t valid_group :1; /**< Group validation flag. */
- uint32_t ext_entry :1; /**< External entry. */
+ uint32_t valid :1; /**< Validation flag. */
+
+ uint32_t depth :8; /**< Rule depth. */
+ uint32_t next_hop :21; /**< Next hop / next table to be checked. */
};
+#endif
+
/** Rules tbl entry structure. */
struct rte_lpm6_rule {
uint8_t ip[RTE_LPM6_IPV6_ADDR_SIZE]; /**< Rule IP address. */
new file mode 100644
@@ -0,0 +1,130 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * (c) Copyright IBM Corp. 2016, 2018
+ */
+
+#ifndef _RTE_LPM_S390X_H_
+#define _RTE_LPM_S390X_H_
+
+#include <rte_branch_prediction.h>
+#include <rte_byteorder.h>
+#include <rte_common.h>
+#include <rte_vect.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static inline void
+rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
+ uint32_t defv)
+{
+ typedef int vector_signed_int
+ __attribute__((vector_size(4*sizeof(int))));
+ vector_signed_int i24;
+ rte_xmm_t i8;
+ uint32_t tbl[4];
+ uint64_t idx, pt, pt2;
+ const uint32_t *ptbl;
+
+ const uint32_t mask = UINT8_MAX;
+ const vector_signed_int mask8 = (xmm_t){mask, mask, mask, mask};
+
+ /*
+ * RTE_LPM_VALID_EXT_ENTRY_BITMASK for 2 LPM entries
+ * as one 64-bit value (0x0300000003000000).
+ */
+ const uint64_t mask_xv =
+ ((uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK |
+ (uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK << 32);
+
+ /*
+ * RTE_LPM_LOOKUP_SUCCESS for 2 LPM entries
+ * as one 64-bit value (0x0100000001000000).
+ */
+ const uint64_t mask_v =
+ ((uint64_t)RTE_LPM_LOOKUP_SUCCESS |
+ (uint64_t)RTE_LPM_LOOKUP_SUCCESS << 32);
+
+ /* get 4 indexes for tbl24[]. */
+ i24[0] = (uint32_t)ip[0] >> 8;
+ i24[1] = (uint32_t)ip[1] >> 8;
+ i24[2] = (uint32_t)ip[2] >> 8;
+ i24[3] = (uint32_t)ip[3] >> 8;
+
+ /* extract values from tbl24[] */
+ idx = (uint32_t)i24[0];
+ idx = idx < (1<<24) ? idx : (1<<24)-1;
+ ptbl = (const uint32_t *)&lpm->tbl24[idx];
+ tbl[0] = *ptbl;
+
+ idx = (uint32_t) i24[1];
+ idx = idx < (1<<24) ? idx : (1<<24)-1;
+ ptbl = (const uint32_t *)&lpm->tbl24[idx];
+ tbl[1] = *ptbl;
+
+ idx = (uint32_t) i24[2];
+ idx = idx < (1<<24) ? idx : (1<<24)-1;
+ ptbl = (const uint32_t *)&lpm->tbl24[idx];
+ tbl[2] = *ptbl;
+
+ idx = (uint32_t) i24[3];
+ idx = idx < (1<<24) ? idx : (1<<24)-1;
+ ptbl = (const uint32_t *)&lpm->tbl24[idx];
+ tbl[3] = *ptbl;
+
+ /* get 4 indexes for tbl8[]. */
+ i8.x = vec_and(ip, mask8);
+
+ pt = (uint64_t)tbl[0] |
+ (uint64_t)tbl[1] << 32;
+ pt2 = (uint64_t)tbl[2] |
+ (uint64_t)tbl[3] << 32;
+
+ /* search successfully finished for all 4 IP addresses. */
+ if (likely((pt & mask_xv) == mask_v) &&
+ likely((pt2 & mask_xv) == mask_v)) {
+ *(uint64_t *)hop = pt & RTE_LPM_MASKX4_RES;
+ *(uint64_t *)(hop + 2) = pt2 & RTE_LPM_MASKX4_RES;
+ return;
+ }
+
+ if (unlikely((pt & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
+ RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
+ i8.u32[0] = i8.u32[0] +
+ (uint8_t)tbl[0] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+ ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[0]];
+ tbl[0] = *ptbl;
+ }
+ if (unlikely((pt >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
+ RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
+ i8.u32[1] = i8.u32[1] +
+ (uint8_t)tbl[1] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+ ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[1]];
+ tbl[1] = *ptbl;
+ }
+ if (unlikely((pt2 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
+ RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
+ i8.u32[2] = i8.u32[2] +
+ (uint8_t)tbl[2] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+ ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[2]];
+ tbl[2] = *ptbl;
+ }
+ if (unlikely((pt2 >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
+ RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
+ i8.u32[3] = i8.u32[3] +
+ (uint8_t)tbl[3] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
+ ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[3]];
+ tbl[3] = *ptbl;
+ }
+
+ hop[0] = (tbl[0] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[0] & 0x00FFFFFF : defv;
+ hop[1] = (tbl[1] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[1] & 0x00FFFFFF : defv;
+ hop[2] = (tbl[2] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[2] & 0x00FFFFFF : defv;
+ hop[3] = (tbl[3] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[3] & 0x00FFFFFF : defv;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_LPM_S390X_H_ */