diff options
Diffstat (limited to 'lib/libtle_l4p/ctx.c')
-rw-r--r-- | lib/libtle_l4p/ctx.c | 527 |
1 files changed, 527 insertions, 0 deletions
diff --git a/lib/libtle_l4p/ctx.c b/lib/libtle_l4p/ctx.c new file mode 100644 index 0000000..7ebef9d --- /dev/null +++ b/lib/libtle_l4p/ctx.c @@ -0,0 +1,527 @@ +/* + * Copyright (c) 2016 Intel Corporation. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <string.h> +#include <rte_malloc.h> +#include <rte_errno.h> +#include <rte_ethdev.h> +#include <rte_ip.h> + +#include "stream.h" +#include "misc.h" + +#define LPORT_START 0x8000 +#define LPORT_END MAX_PORT_NUM + +#define LPORT_START_BLK PORT_BLK(LPORT_START) +#define LPORT_END_BLK PORT_BLK(LPORT_END) + +const struct in6_addr tle_ipv6_any = IN6ADDR_ANY_INIT; +const struct in6_addr tle_ipv6_none = { + { + .__u6_addr32 = { + UINT32_MAX, UINT32_MAX, UINT32_MAX, UINT32_MAX + }, + }, +}; + +struct stream_ops tle_stream_ops[TLE_PROTO_NUM] = {}; + +static int +check_dev_prm(const struct tle_dev_param *dev_prm) +{ + /* no valid IPv4/IPv6 addresses provided. */ + if (dev_prm->local_addr4.s_addr == INADDR_ANY && + memcmp(&dev_prm->local_addr6, &tle_ipv6_any, + sizeof(tle_ipv6_any)) == 0) + return -EINVAL; + + if (dev_prm->bl4.nb_port > UINT16_MAX || + (dev_prm->bl4.nb_port != 0 && + dev_prm->bl4.port == NULL)) + return -EINVAL; + + if (dev_prm->bl6.nb_port > UINT16_MAX || + (dev_prm->bl6.nb_port != 0 && + dev_prm->bl6.port == NULL)) + return -EINVAL; + + return 0; +} + +static int +check_ctx_prm(const struct tle_ctx_param *prm) +{ + if (prm->proto >= TLE_PROTO_NUM) + return -EINVAL; + return 0; +} + +struct tle_ctx * +tle_ctx_create(const struct tle_ctx_param *ctx_prm) +{ + struct tle_ctx *ctx; + size_t sz; + uint32_t i; + int32_t rc; + + if (ctx_prm == NULL || check_ctx_prm(ctx_prm) != 0) { + rte_errno = EINVAL; + return NULL; + } + + sz = sizeof(*ctx); + ctx = rte_zmalloc_socket(NULL, sz, RTE_CACHE_LINE_SIZE, + ctx_prm->socket_id); + if (ctx == NULL) { + UDP_LOG(ERR, "allocation of %zu bytes for new ctx " + "on socket %d failed\n", + sz, ctx_prm->socket_id); + return NULL; + } + + ctx->prm = *ctx_prm; + + rc = tle_stream_ops[ctx_prm->proto].init_streams(ctx); + if (rc != 0) { + UDP_LOG(ERR, "init_streams(ctx=%p, proto=%u) failed " + "with error code: %d;\n", + ctx, ctx_prm->proto, rc); + tle_ctx_destroy(ctx); + rte_errno = -rc; + return NULL; + } + + for (i = 0; i != RTE_DIM(ctx->use); i++) + tle_pbm_init(ctx->use + i, LPORT_START_BLK); + + ctx->streams.nb_free = ctx->prm.max_streams; + return ctx; +} + +void +tle_ctx_destroy(struct tle_ctx *ctx) +{ + uint32_t i; + + if (ctx == NULL) { + rte_errno = EINVAL; + return; + } + + for (i = 0; i != RTE_DIM(ctx->dev); i++) + tle_del_dev(ctx->dev + i); + + tle_stream_ops[ctx->prm.proto].fini_streams(ctx); + rte_free(ctx); +} + +void +tle_ctx_invalidate(struct tle_ctx *ctx) +{ + RTE_SET_USED(ctx); +} + +static void +fill_pbm(struct tle_pbm *pbm, const struct tle_bl_port *blp) +{ + uint32_t i; + + for (i = 0; i != blp->nb_port; i++) + tle_pbm_set(pbm, blp->port[i]); +} + +static int +init_dev_proto(struct tle_dev *dev, uint32_t idx, int32_t socket_id, + const struct tle_bl_port *blp) +{ + size_t sz; + + sz = sizeof(*dev->dp[idx]); + dev->dp[idx] = rte_zmalloc_socket(NULL, sz, RTE_CACHE_LINE_SIZE, + socket_id); + + if (dev->dp[idx] == NULL) { + UDP_LOG(ERR, "allocation of %zu bytes on " + "socket %d for %u-th device failed\n", + sz, socket_id, idx); + return ENOMEM; + } + + tle_pbm_init(&dev->dp[idx]->use, LPORT_START_BLK); + fill_pbm(&dev->dp[idx]->use, blp); + return 0; +} + +static struct tle_dev * +find_free_dev(struct tle_ctx *ctx) +{ + uint32_t i; + + if (ctx->nb_dev < RTE_DIM(ctx->dev)) { + for (i = 0; i != RTE_DIM(ctx->dev); i++) { + if (ctx->dev[i].ctx != ctx) + return ctx->dev + i; + } + } + + rte_errno = ENODEV; + return NULL; +} + +struct tle_dev * +tle_add_dev(struct tle_ctx *ctx, const struct tle_dev_param *dev_prm) +{ + int32_t rc; + struct tle_dev *dev; + + if (ctx == NULL || dev_prm == NULL || check_dev_prm(dev_prm) != 0) { + rte_errno = EINVAL; + return NULL; + } + + dev = find_free_dev(ctx); + if (dev == NULL) + return NULL; + rc = 0; + + /* device can handle IPv4 traffic */ + if (dev_prm->local_addr4.s_addr != INADDR_ANY) { + rc = init_dev_proto(dev, TLE_V4, ctx->prm.socket_id, + &dev_prm->bl4); + if (rc == 0) + fill_pbm(&ctx->use[TLE_V4], &dev_prm->bl4); + } + + /* device can handle IPv6 traffic */ + if (rc == 0 && memcmp(&dev_prm->local_addr6, &tle_ipv6_any, + sizeof(tle_ipv6_any)) != 0) { + rc = init_dev_proto(dev, TLE_V6, ctx->prm.socket_id, + &dev_prm->bl6); + if (rc == 0) + fill_pbm(&ctx->use[TLE_V6], &dev_prm->bl6); + } + + if (rc != 0) { + /* cleanup and return an error. */ + rte_free(dev->dp[TLE_V4]); + rte_free(dev->dp[TLE_V6]); + rte_errno = rc; + return NULL; + } + + /* setup RX data. */ + if (dev_prm->local_addr4.s_addr != INADDR_ANY && + (dev_prm->rx_offload & DEV_RX_OFFLOAD_IPV4_CKSUM) == 0) + dev->rx.ol_flags[TLE_V4] |= PKT_RX_IP_CKSUM_BAD; + + if (((dev_prm->rx_offload & DEV_RX_OFFLOAD_UDP_CKSUM) == 0 && + ctx->prm.proto == TLE_PROTO_UDP) || + ((dev_prm->rx_offload & + DEV_RX_OFFLOAD_TCP_CKSUM) == 0 && + ctx->prm.proto == TLE_PROTO_TCP)) { + dev->rx.ol_flags[TLE_V4] |= PKT_RX_L4_CKSUM_BAD; + dev->rx.ol_flags[TLE_V6] |= PKT_RX_L4_CKSUM_BAD; + } + + /* setup TX data. */ + tle_dring_reset(&dev->tx.dr); + + if ((dev_prm->tx_offload & DEV_TX_OFFLOAD_UDP_CKSUM) != 0 && + ctx->prm.proto == TLE_PROTO_UDP) { + dev->tx.ol_flags[TLE_V4] |= PKT_TX_IPV4 | PKT_TX_UDP_CKSUM; + dev->tx.ol_flags[TLE_V6] |= PKT_TX_IPV6 | PKT_TX_UDP_CKSUM; + } else if ((dev_prm->tx_offload & DEV_TX_OFFLOAD_TCP_CKSUM) != 0 && + ctx->prm.proto == TLE_PROTO_TCP) { + dev->tx.ol_flags[TLE_V4] |= PKT_TX_IPV4 | PKT_TX_TCP_CKSUM; + dev->tx.ol_flags[TLE_V6] |= PKT_TX_IPV6 | PKT_TX_TCP_CKSUM; + } + + if ((dev_prm->tx_offload & DEV_TX_OFFLOAD_IPV4_CKSUM) != 0) + dev->tx.ol_flags[TLE_V4] |= PKT_TX_IPV4 | PKT_TX_IP_CKSUM; + + dev->prm = *dev_prm; + dev->ctx = ctx; + ctx->nb_dev++; + + return dev; +} + +static void +empty_dring(struct tle_dring *dr, uint32_t proto) +{ + uint32_t i, k, n; + struct tle_stream *s; + struct rte_mbuf *pkt[MAX_PKT_BURST]; + struct tle_drb *drb[MAX_PKT_BURST]; + + do { + k = RTE_DIM(drb); + n = tle_dring_sc_dequeue(dr, (const void **)(uintptr_t)pkt, + RTE_DIM(pkt), drb, &k); + + /* free mbufs */ + for (i = 0; i != n; i++) + rte_pktmbuf_free(pkt[i]); + /* free drbs */ + for (i = 0; i != k; i++) { + s = drb[i]->udata; + tle_stream_ops[proto].free_drbs(s, drb + i, 1); + } + } while (n != 0); +} + +int +tle_del_dev(struct tle_dev *dev) +{ + uint32_t p; + struct tle_ctx *ctx; + + if (dev == NULL || dev->ctx == NULL) + return -EINVAL; + + ctx = dev->ctx; + p = dev - ctx->dev; + + if (p >= RTE_DIM(ctx->dev) || + (dev->dp[TLE_V4] == NULL && + dev->dp[TLE_V6] == NULL)) + return -EINVAL; + + /* emtpy TX queues. */ + empty_dring(&dev->tx.dr, ctx->prm.proto); + + rte_free(dev->dp[TLE_V4]); + rte_free(dev->dp[TLE_V6]); + memset(dev, 0, sizeof(*dev)); + ctx->nb_dev--; + return 0; +} + +static struct tle_dev * +find_ipv4_dev(struct tle_ctx *ctx, const struct in_addr *addr) +{ + uint32_t i; + + for (i = 0; i != RTE_DIM(ctx->dev); i++) { + if (ctx->dev[i].prm.local_addr4.s_addr == addr->s_addr && + ctx->dev[i].dp[TLE_V4] != NULL) + return ctx->dev + i; + } + + return NULL; +} + +static struct tle_dev * +find_ipv6_dev(struct tle_ctx *ctx, const struct in6_addr *addr) +{ + uint32_t i; + + for (i = 0; i != RTE_DIM(ctx->dev); i++) { + if (memcmp(&ctx->dev[i].prm.local_addr6, addr, + sizeof(*addr)) == 0 && + ctx->dev[i].dp[TLE_V6] != NULL) + return ctx->dev + i; + } + + return NULL; +} + +static int +stream_fill_dev(struct tle_ctx *ctx, struct tle_stream *s, + const struct sockaddr *addr) +{ + struct tle_dev *dev; + struct tle_pbm *pbm; + const struct sockaddr_in *lin4; + const struct sockaddr_in6 *lin6; + uint32_t i, p, sp, t; + + if (addr->sa_family == AF_INET) { + lin4 = (const struct sockaddr_in *)addr; + t = TLE_V4; + p = lin4->sin_port; + } else if (addr->sa_family == AF_INET6) { + lin6 = (const struct sockaddr_in6 *)addr; + t = TLE_V6; + p = lin6->sin6_port; + } else + return EINVAL; + + p = ntohs(p); + + /* if local address is not wildcard, find device it belongs to. */ + if (t == TLE_V4 && lin4->sin_addr.s_addr != INADDR_ANY) { + dev = find_ipv4_dev(ctx, &lin4->sin_addr); + if (dev == NULL) + return ENODEV; + } else if (t == TLE_V6 && memcmp(&tle_ipv6_any, &lin6->sin6_addr, + sizeof(tle_ipv6_any)) != 0) { + dev = find_ipv6_dev(ctx, &lin6->sin6_addr); + if (dev == NULL) + return ENODEV; + } else + dev = NULL; + + if (dev != NULL) + pbm = &dev->dp[t]->use; + else + pbm = &ctx->use[t]; + + /* try to acquire local port number. */ + if (p == 0) { + p = tle_pbm_find_range(pbm, pbm->blk, LPORT_END_BLK); + if (p == 0 && pbm->blk > LPORT_START_BLK) + p = tle_pbm_find_range(pbm, LPORT_START_BLK, pbm->blk); + } else if (tle_pbm_check(pbm, p) != 0) + return EEXIST; + + if (p == 0) + return ENFILE; + + /* fill socket's dst port and type */ + + sp = htons(p); + s->type = t; + s->port.dst = sp; + + /* mark port as in-use */ + + tle_pbm_set(&ctx->use[t], p); + if (dev != NULL) { + tle_pbm_set(pbm, p); + dev->dp[t]->streams[sp] = s; + } else { + for (i = 0; i != RTE_DIM(ctx->dev); i++) { + if (ctx->dev[i].dp[t] != NULL) { + tle_pbm_set(&ctx->dev[i].dp[t]->use, p); + ctx->dev[i].dp[t]->streams[sp] = s; + } + } + } + + return 0; +} + +static int +stream_clear_dev(struct tle_ctx *ctx, const struct tle_stream *s) +{ + struct tle_dev *dev; + uint32_t i, p, sp, t; + + t = s->type; + sp = s->port.dst; + p = ntohs(sp); + + /* if local address is not wildcard, find device it belongs to. */ + if (t == TLE_V4 && s->ipv4.addr.dst != INADDR_ANY) { + dev = find_ipv4_dev(ctx, + (const struct in_addr *)&s->ipv4.addr.dst); + if (dev == NULL) + return ENODEV; + } else if (t == TLE_V6 && memcmp(&tle_ipv6_any, &s->ipv6.addr.dst, + sizeof(tle_ipv6_any)) != 0) { + dev = find_ipv6_dev(ctx, + (const struct in6_addr *)&s->ipv6.addr.dst); + if (dev == NULL) + return ENODEV; + } else + dev = NULL; + + tle_pbm_clear(&ctx->use[t], p); + if (dev != NULL) { + if (dev->dp[t]->streams[sp] == s) { + tle_pbm_clear(&dev->dp[t]->use, p); + dev->dp[t]->streams[sp] = NULL; + } + } else { + for (i = 0; i != RTE_DIM(ctx->dev); i++) { + if (ctx->dev[i].dp[t] != NULL && + ctx->dev[i].dp[t]->streams[sp] == s) { + tle_pbm_clear(&ctx->dev[i].dp[t]->use, p); + ctx->dev[i].dp[t]->streams[sp] = NULL; + } + } + } + + return 0; +} + +static void +fill_ipv4_am(const struct sockaddr_in *in, uint32_t *addr, uint32_t *mask) +{ + *addr = in->sin_addr.s_addr; + *mask = (*addr == INADDR_ANY) ? INADDR_ANY : INADDR_NONE; +} + +static void +fill_ipv6_am(const struct sockaddr_in6 *in, rte_xmm_t *addr, rte_xmm_t *mask) +{ + const struct in6_addr *pm; + + memcpy(addr, &in->sin6_addr, sizeof(*addr)); + if (memcmp(&tle_ipv6_any, addr, sizeof(*addr)) == 0) + pm = &tle_ipv6_any; + else + pm = &tle_ipv6_none; + + memcpy(mask, pm, sizeof(*mask)); +} + +int +stream_fill_ctx(struct tle_ctx *ctx, struct tle_stream *s, + const struct sockaddr *laddr, const struct sockaddr *raddr) +{ + const struct sockaddr_in *rin; + int32_t rc; + + /* setup ports and port mask fields (except dst port). */ + rin = (const struct sockaddr_in *)raddr; + s->port.src = rin->sin_port; + s->pmsk.src = (s->port.src == 0) ? 0 : UINT16_MAX; + s->pmsk.dst = UINT16_MAX; + + /* setup src and dst addresses. */ + if (laddr->sa_family == AF_INET) { + fill_ipv4_am((const struct sockaddr_in *)laddr, + &s->ipv4.addr.dst, &s->ipv4.mask.dst); + fill_ipv4_am((const struct sockaddr_in *)raddr, + &s->ipv4.addr.src, &s->ipv4.mask.src); + } else if (laddr->sa_family == AF_INET6) { + fill_ipv6_am((const struct sockaddr_in6 *)laddr, + &s->ipv6.addr.dst, &s->ipv6.mask.dst); + fill_ipv6_am((const struct sockaddr_in6 *)raddr, + &s->ipv6.addr.src, &s->ipv6.mask.src); + } + + rte_spinlock_lock(&ctx->dev_lock); + rc = stream_fill_dev(ctx, s, laddr); + rte_spinlock_unlock(&ctx->dev_lock); + + return rc; +} + +/* free stream's destination port */ +int +stream_clear_ctx(struct tle_ctx *ctx, struct tle_stream *s) +{ + int32_t rc; + + rte_spinlock_lock(&ctx->dev_lock); + rc = stream_clear_dev(ctx, s); + rte_spinlock_unlock(&ctx->dev_lock); + + return rc; +} |