From: Shagun Agrawal Date: Mon, 27 Aug 2018 12:52:29 +0000 (+0530) Subject: net/cxgbe: add API to program hardware layer 2 table X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=23af667f1507;p=dpdk.git net/cxgbe: add API to program hardware layer 2 table Add API to program and manage hardware Layer 2 Table. L2T holds information necessary to rewrite specific fields in packet, such as destination MAC address and vlan id. Signed-off-by: Shagun Agrawal Signed-off-by: Rahul Lakkireddy --- diff --git a/drivers/net/cxgbe/Makefile b/drivers/net/cxgbe/Makefile index 5d66c4b3ab..d75b070f34 100644 --- a/drivers/net/cxgbe/Makefile +++ b/drivers/net/cxgbe/Makefile @@ -53,6 +53,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_CXGBE_PMD) += cxgbe_filter.c SRCS-$(CONFIG_RTE_LIBRTE_CXGBE_PMD) += cxgbe_flow.c SRCS-$(CONFIG_RTE_LIBRTE_CXGBE_PMD) += t4_hw.c SRCS-$(CONFIG_RTE_LIBRTE_CXGBE_PMD) += clip_tbl.c +SRCS-$(CONFIG_RTE_LIBRTE_CXGBE_PMD) += l2t.c SRCS-$(CONFIG_RTE_LIBRTE_CXGBE_PMD) += t4vf_hw.c include $(RTE_SDK)/mk/rte.lib.mk diff --git a/drivers/net/cxgbe/base/adapter.h b/drivers/net/cxgbe/base/adapter.h index e98dd21825..9f4a9653c8 100644 --- a/drivers/net/cxgbe/base/adapter.h +++ b/drivers/net/cxgbe/base/adapter.h @@ -324,7 +324,10 @@ struct adapter { unsigned int clipt_start; /* CLIP table start */ unsigned int clipt_end; /* CLIP table end */ + unsigned int l2t_start; /* Layer 2 table start */ + unsigned int l2t_end; /* Layer 2 table end */ struct clip_tbl *clipt; /* CLIP table */ + struct l2t_data *l2t; /* Layer 2 table */ struct tid_info tids; /* Info used to access TID related tables */ }; diff --git a/drivers/net/cxgbe/base/t4_msg.h b/drivers/net/cxgbe/base/t4_msg.h index 5d433c91c1..094a153f2c 100644 --- a/drivers/net/cxgbe/base/t4_msg.h +++ b/drivers/net/cxgbe/base/t4_msg.h @@ -11,7 +11,9 @@ enum { CPL_SET_TCB_FIELD = 0x5, CPL_ABORT_REQ = 0xA, CPL_ABORT_RPL = 0xB, + CPL_L2T_WRITE_REQ = 0x12, CPL_TID_RELEASE = 0x1A, + CPL_L2T_WRITE_RPL = 0x23, CPL_ACT_OPEN_RPL = 0x25, CPL_ABORT_RPL_RSS = 0x2D, CPL_SET_TCB_RPL = 0x3A, @@ -66,6 +68,9 @@ union opcode_tid { #define M_TID_TID 0x3fff #define G_TID_TID(x) (((x) >> S_TID_TID) & M_TID_TID) +#define S_TID_QID 14 +#define V_TID_QID(x) ((x) << S_TID_QID) + struct rss_header { __u8 opcode; #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN @@ -421,6 +426,35 @@ struct cpl_rx_pkt { __be16 err_vec; }; +struct cpl_l2t_write_req { + WR_HDR; + union opcode_tid ot; + __be16 params; + __be16 l2t_idx; + __be16 vlan; + __u8 dst_mac[6]; +}; + +/* cpl_l2t_write_req.params fields */ +#define S_L2T_W_PORT 8 +#define V_L2T_W_PORT(x) ((x) << S_L2T_W_PORT) + +#define S_L2T_W_LPBK 10 +#define V_L2T_W_LPBK(x) ((x) << S_L2T_W_LPBK) + +#define S_L2T_W_ARPMISS 11 +#define V_L2T_W_ARPMISS(x) ((x) << S_L2T_W_ARPMISS) + +#define S_L2T_W_NOREPLY 15 +#define V_L2T_W_NOREPLY(x) ((x) << S_L2T_W_NOREPLY) + +struct cpl_l2t_write_rpl { + RSS_HDR + union opcode_tid ot; + __u8 status; + __u8 rsvd[3]; +}; + /* rx_pkt.l2info fields */ #define S_RXF_UDP 22 #define V_RXF_UDP(x) ((x) << S_RXF_UDP) diff --git a/drivers/net/cxgbe/base/t4fw_interface.h b/drivers/net/cxgbe/base/t4fw_interface.h index e80b58a325..1c08637bb5 100644 --- a/drivers/net/cxgbe/base/t4fw_interface.h +++ b/drivers/net/cxgbe/base/t4fw_interface.h @@ -665,6 +665,8 @@ enum fw_params_param_pfvf { FW_PARAMS_PARAM_PFVF_CLIP_END = 0x04, FW_PARAMS_PARAM_PFVF_FILTER_START = 0x05, FW_PARAMS_PARAM_PFVF_FILTER_END = 0x06, + FW_PARAMS_PARAM_PFVF_L2T_START = 0x13, + FW_PARAMS_PARAM_PFVF_L2T_END = 0x14, FW_PARAMS_PARAM_PFVF_CPLFW4MSG_ENCAP = 0x31, FW_PARAMS_PARAM_PFVF_PORT_CAPS32 = 0x3A }; diff --git a/drivers/net/cxgbe/cxgbe_filter.h b/drivers/net/cxgbe/cxgbe_filter.h index af8fa7529e..be12e231ac 100644 --- a/drivers/net/cxgbe/cxgbe_filter.h +++ b/drivers/net/cxgbe/cxgbe_filter.h @@ -145,6 +145,7 @@ struct filter_entry { u32 pending:1; /* filter action is pending FW reply */ struct filter_ctx *ctx; /* caller's completion hook */ struct clip_entry *clipt; /* CLIP Table entry for IPv6 */ + struct l2t_entry *l2t; /* Layer Two Table entry for dmac */ struct rte_eth_dev *dev; /* Port's rte eth device */ void *private; /* For use by apps using filter_entry */ diff --git a/drivers/net/cxgbe/cxgbe_main.c b/drivers/net/cxgbe/cxgbe_main.c index c3938e8db2..be2bc4213b 100644 --- a/drivers/net/cxgbe/cxgbe_main.c +++ b/drivers/net/cxgbe/cxgbe_main.c @@ -38,6 +38,7 @@ #include "t4_msg.h" #include "cxgbe.h" #include "clip_tbl.h" +#include "l2t.h" /** * Allocate a chunk of memory. The allocated memory is cleared. @@ -99,6 +100,10 @@ static int fwevtq_handler(struct sge_rspq *q, const __be64 *rsp, const struct cpl_act_open_rpl *p = (const void *)rsp; hash_filter_rpl(q->adapter, p); + } else if (opcode == CPL_L2T_WRITE_RPL) { + const struct cpl_l2t_write_rpl *p = (const void *)rsp; + + do_l2t_write_rpl(q->adapter, p); } else { dev_err(adapter, "unexpected CPL %#x on FW event queue\n", opcode); @@ -1135,13 +1140,17 @@ static int adap_init0(struct adapter *adap) V_FW_PARAMS_PARAM_Y(0) | \ V_FW_PARAMS_PARAM_Z(0)) - params[0] = FW_PARAM_PFVF(FILTER_START); - params[1] = FW_PARAM_PFVF(FILTER_END); - ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 2, params, val); + params[0] = FW_PARAM_PFVF(L2T_START); + params[1] = FW_PARAM_PFVF(L2T_END); + params[2] = FW_PARAM_PFVF(FILTER_START); + params[3] = FW_PARAM_PFVF(FILTER_END); + ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 4, params, val); if (ret < 0) goto bye; - adap->tids.ftid_base = val[0]; - adap->tids.nftids = val[1] - val[0] + 1; + adap->l2t_start = val[0]; + adap->l2t_end = val[1]; + adap->tids.ftid_base = val[2]; + adap->tids.nftids = val[3] - val[2] + 1; params[0] = FW_PARAM_PFVF(CLIP_START); params[1] = FW_PARAM_PFVF(CLIP_END); @@ -1679,10 +1688,11 @@ void cxgbe_close(struct adapter *adapter) int i; if (adapter->flags & FULL_INIT_DONE) { - if (is_pf4(adapter)) - t4_intr_disable(adapter); tid_free(&adapter->tids); t4_cleanup_clip_tbl(adapter); + t4_cleanup_l2t(adapter); + if (is_pf4(adapter)) + t4_intr_disable(adapter); t4_sge_tx_monitor_stop(adapter); t4_free_sge_resources(adapter); for_each_port(adapter, i) { @@ -1855,6 +1865,12 @@ allocate_mac: dev_warn(adapter, "could not allocate CLIP. Continuing\n"); } + adapter->l2t = t4_init_l2t(adapter->l2t_start, adapter->l2t_end); + if (!adapter->l2t) { + /* We tolerate a lack of L2T, giving up some functionality */ + dev_warn(adapter, "could not allocate L2T. Continuing\n"); + } + if (tid_init(&adapter->tids) < 0) { /* Disable filtering support */ dev_warn(adapter, "could not allocate TID table, " diff --git a/drivers/net/cxgbe/l2t.c b/drivers/net/cxgbe/l2t.c new file mode 100644 index 0000000000..814188fea2 --- /dev/null +++ b/drivers/net/cxgbe/l2t.c @@ -0,0 +1,227 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Chelsio Communications. + * All rights reserved. + */ +#include "common.h" +#include "l2t.h" + +/** + * cxgbe_l2t_release - Release associated L2T entry + * @e: L2T entry to release + * + * Releases ref count and frees up an L2T entry from L2T table + */ +void cxgbe_l2t_release(struct l2t_entry *e) +{ + if (rte_atomic32_read(&e->refcnt) != 0) + rte_atomic32_dec(&e->refcnt); +} + +/** + * Process a CPL_L2T_WRITE_RPL. Note that the TID in the reply is really + * the L2T index it refers to. + */ +void do_l2t_write_rpl(struct adapter *adap, const struct cpl_l2t_write_rpl *rpl) +{ + struct l2t_data *d = adap->l2t; + unsigned int tid = GET_TID(rpl); + unsigned int l2t_idx = tid % L2T_SIZE; + + if (unlikely(rpl->status != CPL_ERR_NONE)) { + dev_err(adap, + "Unexpected L2T_WRITE_RPL status %u for entry %u\n", + rpl->status, l2t_idx); + return; + } + + if (tid & F_SYNC_WR) { + struct l2t_entry *e = &d->l2tab[l2t_idx - d->l2t_start]; + + t4_os_lock(&e->lock); + if (e->state != L2T_STATE_SWITCHING) + e->state = L2T_STATE_VALID; + t4_os_unlock(&e->lock); + } +} + +/** + * Write an L2T entry. Must be called with the entry locked. + * The write may be synchronous or asynchronous. + */ +static int write_l2e(struct rte_eth_dev *dev, struct l2t_entry *e, int sync, + bool loopback, bool arpmiss) +{ + struct adapter *adap = ethdev2adap(dev); + struct l2t_data *d = adap->l2t; + struct rte_mbuf *mbuf; + struct cpl_l2t_write_req *req; + struct sge_ctrl_txq *ctrlq; + unsigned int l2t_idx = e->idx + d->l2t_start; + unsigned int port_id = ethdev2pinfo(dev)->port_id; + + ctrlq = &adap->sge.ctrlq[port_id]; + mbuf = rte_pktmbuf_alloc(ctrlq->mb_pool); + if (!mbuf) + return -ENOMEM; + + mbuf->data_len = sizeof(*req); + mbuf->pkt_len = mbuf->data_len; + + req = rte_pktmbuf_mtod(mbuf, struct cpl_l2t_write_req *); + INIT_TP_WR(req, 0); + + OPCODE_TID(req) = + cpu_to_be32(MK_OPCODE_TID(CPL_L2T_WRITE_REQ, + l2t_idx | V_SYNC_WR(sync) | + V_TID_QID(adap->sge.fw_evtq.abs_id))); + req->params = cpu_to_be16(V_L2T_W_PORT(e->lport) | + V_L2T_W_LPBK(loopback) | + V_L2T_W_ARPMISS(arpmiss) | + V_L2T_W_NOREPLY(!sync)); + req->l2t_idx = cpu_to_be16(l2t_idx); + req->vlan = cpu_to_be16(e->vlan); + rte_memcpy(req->dst_mac, e->dmac, ETHER_ADDR_LEN); + + if (loopback) + memset(req->dst_mac, 0, ETHER_ADDR_LEN); + + t4_mgmt_tx(ctrlq, mbuf); + + if (sync && e->state != L2T_STATE_SWITCHING) + e->state = L2T_STATE_SYNC_WRITE; + + return 0; +} + +/** + * find_or_alloc_l2e - Find/Allocate a free L2T entry + * @d: L2T table + * @vlan: VLAN id to compare/add + * @port: port id to compare/add + * @dmac: Destination MAC address to compare/add + * Returns pointer to the L2T entry found/created + * + * Finds/Allocates an L2T entry to be used by switching rule of a filter. + */ +static struct l2t_entry *find_or_alloc_l2e(struct l2t_data *d, u16 vlan, + u8 port, u8 *dmac) +{ + struct l2t_entry *end, *e; + struct l2t_entry *first_free = NULL; + + for (e = &d->l2tab[0], end = &d->l2tab[d->l2t_size]; e != end; ++e) { + if (rte_atomic32_read(&e->refcnt) == 0) { + if (!first_free) + first_free = e; + } else { + if (e->state == L2T_STATE_SWITCHING) { + if ((!memcmp(e->dmac, dmac, ETHER_ADDR_LEN)) && + e->vlan == vlan && e->lport == port) + goto exists; + } + } + } + + if (first_free) { + e = first_free; + goto found; + } + + return NULL; + +found: + e->state = L2T_STATE_UNUSED; + +exists: + return e; +} + +static struct l2t_entry *t4_l2t_alloc_switching(struct rte_eth_dev *dev, + u16 vlan, u8 port, + u8 *eth_addr) +{ + struct adapter *adap = ethdev2adap(dev); + struct l2t_data *d = adap->l2t; + struct l2t_entry *e; + int ret = 0; + + t4_os_write_lock(&d->lock); + e = find_or_alloc_l2e(d, vlan, port, eth_addr); + if (e) { + t4_os_lock(&e->lock); + if (!rte_atomic32_read(&e->refcnt)) { + e->state = L2T_STATE_SWITCHING; + e->vlan = vlan; + e->lport = port; + rte_memcpy(e->dmac, eth_addr, ETHER_ADDR_LEN); + rte_atomic32_set(&e->refcnt, 1); + ret = write_l2e(dev, e, 0, !L2T_LPBK, !L2T_ARPMISS); + if (ret < 0) + dev_debug(adap, "Failed to write L2T entry: %d", + ret); + } else { + rte_atomic32_inc(&e->refcnt); + } + t4_os_unlock(&e->lock); + } + t4_os_write_unlock(&d->lock); + + return ret ? NULL : e; +} + +/** + * cxgbe_l2t_alloc_switching - Allocate a L2T entry for switching rule + * @dev: rte_eth_dev pointer + * @vlan: VLAN Id + * @port: Associated port + * @dmac: Destination MAC address to add to L2T + * Returns pointer to the allocated l2t entry + * + * Allocates a L2T entry for use by switching rule of a filter + */ +struct l2t_entry *cxgbe_l2t_alloc_switching(struct rte_eth_dev *dev, u16 vlan, + u8 port, u8 *dmac) +{ + return t4_l2t_alloc_switching(dev, vlan, port, dmac); +} + +/** + * Initialize L2 Table + */ +struct l2t_data *t4_init_l2t(unsigned int l2t_start, unsigned int l2t_end) +{ + unsigned int l2t_size; + unsigned int i; + struct l2t_data *d; + + if (l2t_start >= l2t_end || l2t_end >= L2T_SIZE) + return NULL; + l2t_size = l2t_end - l2t_start + 1; + + d = t4_os_alloc(sizeof(*d) + l2t_size * sizeof(struct l2t_entry)); + if (!d) + return NULL; + + d->l2t_start = l2t_start; + d->l2t_size = l2t_size; + + t4_os_rwlock_init(&d->lock); + + for (i = 0; i < d->l2t_size; ++i) { + d->l2tab[i].idx = i; + d->l2tab[i].state = L2T_STATE_UNUSED; + t4_os_lock_init(&d->l2tab[i].lock); + rte_atomic32_set(&d->l2tab[i].refcnt, 0); + } + + return d; +} + +/** + * Cleanup L2 Table + */ +void t4_cleanup_l2t(struct adapter *adap) +{ + if (adap->l2t) + t4_os_free(adap->l2t); +} diff --git a/drivers/net/cxgbe/l2t.h b/drivers/net/cxgbe/l2t.h new file mode 100644 index 0000000000..22a34e388b --- /dev/null +++ b/drivers/net/cxgbe/l2t.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Chelsio Communications. + * All rights reserved. + */ +#ifndef _CXGBE_L2T_H_ +#define _CXGBE_L2T_H_ + +#include "t4_msg.h" + +enum { + L2T_SIZE = 4096 /* # of L2T entries */ +}; + +enum { + L2T_STATE_VALID, /* entry is up to date */ + L2T_STATE_SYNC_WRITE, /* synchronous write of entry underway */ + + /* when state is one of the below the entry is not hashed */ + L2T_STATE_SWITCHING, /* entry is being used by a switching filter */ + L2T_STATE_UNUSED /* entry not in use */ +}; + +/* + * State for the corresponding entry of the HW L2 table. + */ +struct l2t_entry { + u16 state; /* entry state */ + u16 idx; /* entry index within in-memory table */ + u16 vlan; /* VLAN TCI (id: bits 0-11, prio: 13-15 */ + u8 lport; /* destination port */ + u8 dmac[ETHER_ADDR_LEN]; /* destination MAC address */ + rte_spinlock_t lock; /* entry lock */ + rte_atomic32_t refcnt; /* entry reference count */ +}; + +struct l2t_data { + unsigned int l2t_start; /* start index of our piece of the L2T */ + unsigned int l2t_size; /* number of entries in l2tab */ + rte_rwlock_t lock; /* table rw lock */ + struct l2t_entry l2tab[0]; /* MUST BE LAST */ +}; + +#define L2T_LPBK true +#define L2T_ARPMISS true + +/* identifies sync vs async L2T_WRITE_REQs */ +#define S_SYNC_WR 12 +#define V_SYNC_WR(x) ((x) << S_SYNC_WR) +#define F_SYNC_WR V_SYNC_WR(1) + +struct l2t_data *t4_init_l2t(unsigned int l2t_start, unsigned int l2t_end); +void t4_cleanup_l2t(struct adapter *adap); +struct l2t_entry *cxgbe_l2t_alloc_switching(struct rte_eth_dev *dev, u16 vlan, + u8 port, u8 *dmac); +void cxgbe_l2t_release(struct l2t_entry *e); +void do_l2t_write_rpl(struct adapter *p, const struct cpl_l2t_write_rpl *rpl); +#endif /* _CXGBE_L2T_H_ */ diff --git a/drivers/net/cxgbe/meson.build b/drivers/net/cxgbe/meson.build index 7c69a34b11..f6a442cb8a 100644 --- a/drivers/net/cxgbe/meson.build +++ b/drivers/net/cxgbe/meson.build @@ -9,6 +9,7 @@ sources = files('cxgbe_ethdev.c', 'cxgbe_filter.c', 'cxgbe_flow.c', 'clip_tbl.c', + 'l2t.c', 'base/t4_hw.c', 'base/t4vf_hw.c') includes += include_directories('base')