/* SPDX-License-Identifier: BSD-3-Clause * Copyright(c) 2014-2018 Chelsio Communications. * All rights reserved. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "base/common.h" #include "base/t4_regs.h" #include "base/t4_msg.h" #include "cxgbe.h" static inline void ship_tx_pkt_coalesce_wr(struct adapter *adap, struct sge_eth_txq *txq); /* * Max number of Rx buffers we replenish at a time. */ #define MAX_RX_REFILL 64U #define NOMEM_TMR_IDX (SGE_NTIMERS - 1) /* * Max Tx descriptor space we allow for an Ethernet packet to be inlined * into a WR. */ #define MAX_IMM_TX_PKT_LEN 256 /* * Max size of a WR sent through a control Tx queue. */ #define MAX_CTRL_WR_LEN SGE_MAX_WR_LEN /* * Rx buffer sizes for "usembufs" Free List buffers (one ingress packet * per mbuf buffer). We currently only support two sizes for 1500- and * 9000-byte MTUs. We could easily support more but there doesn't seem to be * much need for that ... */ #define FL_MTU_SMALL 1500 #define FL_MTU_LARGE 9000 static inline unsigned int fl_mtu_bufsize(struct adapter *adapter, unsigned int mtu) { struct sge *s = &adapter->sge; return CXGBE_ALIGN(s->pktshift + RTE_ETHER_HDR_LEN + VLAN_HLEN + mtu, s->fl_align); } #define FL_MTU_SMALL_BUFSIZE(adapter) fl_mtu_bufsize(adapter, FL_MTU_SMALL) #define FL_MTU_LARGE_BUFSIZE(adapter) fl_mtu_bufsize(adapter, FL_MTU_LARGE) /* * Bits 0..3 of rx_sw_desc.dma_addr have special meaning. The hardware uses * these to specify the buffer size as an index into the SGE Free List Buffer * Size register array. We also use bit 4, when the buffer has been unmapped * for DMA, but this is of course never sent to the hardware and is only used * to prevent double unmappings. All of the above requires that the Free List * Buffers which we allocate have the bottom 5 bits free (0) -- i.e. are * 32-byte or or a power of 2 greater in alignment. Since the SGE's minimal * Free List Buffer alignment is 32 bytes, this works out for us ... */ enum { RX_BUF_FLAGS = 0x1f, /* bottom five bits are special */ RX_BUF_SIZE = 0x0f, /* bottom three bits are for buf sizes */ RX_UNMAPPED_BUF = 0x10, /* buffer is not mapped */ /* * XXX We shouldn't depend on being able to use these indices. * XXX Especially when some other Master PF has initialized the * XXX adapter or we use the Firmware Configuration File. We * XXX should really search through the Host Buffer Size register * XXX array for the appropriately sized buffer indices. */ RX_SMALL_PG_BUF = 0x0, /* small (PAGE_SIZE) page buffer */ RX_LARGE_PG_BUF = 0x1, /* buffer large page buffer */ RX_SMALL_MTU_BUF = 0x2, /* small MTU buffer */ RX_LARGE_MTU_BUF = 0x3, /* large MTU buffer */ }; /** * txq_avail - return the number of available slots in a Tx queue * @q: the Tx queue * * Returns the number of descriptors in a Tx queue available to write new * packets. */ static inline unsigned int txq_avail(const struct sge_txq *q) { return q->size - 1 - q->in_use; } static int map_mbuf(struct rte_mbuf *mbuf, dma_addr_t *addr) { struct rte_mbuf *m = mbuf; for (; m; m = m->next, addr++) { *addr = m->buf_iova + rte_pktmbuf_headroom(m); if (*addr == 0) goto out_err; } return 0; out_err: return -ENOMEM; } /** * free_tx_desc - reclaims Tx descriptors and their buffers * @q: the Tx queue to reclaim descriptors from * @n: the number of descriptors to reclaim * * Reclaims Tx descriptors from an SGE Tx queue and frees the associated * Tx buffers. Called with the Tx queue lock held. */ static void free_tx_desc(struct sge_txq *q, unsigned int n) { struct tx_sw_desc *d; unsigned int cidx = 0; d = &q->sdesc[cidx]; while (n--) { if (d->mbuf) { /* an SGL is present */ rte_pktmbuf_free(d->mbuf); d->mbuf = NULL; } if (d->coalesce.idx) { int i; for (i = 0; i < d->coalesce.idx; i++) { rte_pktmbuf_free(d->coalesce.mbuf[i]); d->coalesce.mbuf[i] = NULL; } d->coalesce.idx = 0; } ++d; if (++cidx == q->size) { cidx = 0; d = q->sdesc; } RTE_MBUF_PREFETCH_TO_FREE(&q->sdesc->mbuf->pool); } } static void reclaim_tx_desc(struct sge_txq *q, unsigned int n) { struct tx_sw_desc *d; unsigned int cidx = q->cidx; d = &q->sdesc[cidx]; while (n--) { if (d->mbuf) { /* an SGL is present */ rte_pktmbuf_free(d->mbuf); d->mbuf = NULL; } ++d; if (++cidx == q->size) { cidx = 0; d = q->sdesc; } } q->cidx = cidx; } /** * fl_cap - return the capacity of a free-buffer list * @fl: the FL * * Returns the capacity of a free-buffer list. The capacity is less than * the size because one descriptor needs to be left unpopulated, otherwise * HW will think the FL is empty. */ static inline unsigned int fl_cap(const struct sge_fl *fl) { return fl->size - 8; /* 1 descriptor = 8 buffers */ } /** * fl_starving - return whether a Free List is starving. * @adapter: pointer to the adapter * @fl: the Free List * * Tests specified Free List to see whether the number of buffers * available to the hardware has falled below our "starvation" * threshold. */ static inline bool fl_starving(const struct adapter *adapter, const struct sge_fl *fl) { const struct sge *s = &adapter->sge; return fl->avail - fl->pend_cred <= s->fl_starve_thres; } static inline unsigned int get_buf_size(struct adapter *adapter, const struct rx_sw_desc *d) { unsigned int rx_buf_size_idx = d->dma_addr & RX_BUF_SIZE; unsigned int buf_size = 0; switch (rx_buf_size_idx) { case RX_SMALL_MTU_BUF: buf_size = FL_MTU_SMALL_BUFSIZE(adapter); break; case RX_LARGE_MTU_BUF: buf_size = FL_MTU_LARGE_BUFSIZE(adapter); break; default: BUG_ON(1); /* NOT REACHED */ } return buf_size; } /** * free_rx_bufs - free the Rx buffers on an SGE free list * @q: the SGE free list to free buffers from * @n: how many buffers to free * * Release the next @n buffers on an SGE free-buffer Rx queue. The * buffers must be made inaccessible to HW before calling this function. */ static void free_rx_bufs(struct sge_fl *q, int n) { unsigned int cidx = q->cidx; struct rx_sw_desc *d; d = &q->sdesc[cidx]; while (n--) { if (d->buf) { rte_pktmbuf_free(d->buf); d->buf = NULL; } ++d; if (++cidx == q->size) { cidx = 0; d = q->sdesc; } q->avail--; } q->cidx = cidx; } /** * unmap_rx_buf - unmap the current Rx buffer on an SGE free list * @q: the SGE free list * * Unmap the current buffer on an SGE free-buffer Rx queue. The * buffer must be made inaccessible to HW before calling this function. * * This is similar to @free_rx_bufs above but does not free the buffer. * Do note that the FL still loses any further access to the buffer. */ static void unmap_rx_buf(struct sge_fl *q) { if (++q->cidx == q->size) q->cidx = 0; q->avail--; } static inline void ring_fl_db(struct adapter *adap, struct sge_fl *q) { if (q->pend_cred >= 64) { u32 val = adap->params.arch.sge_fl_db; if (is_t4(adap->params.chip)) val |= V_PIDX(q->pend_cred / 8); else val |= V_PIDX_T5(q->pend_cred / 8); /* * Make sure all memory writes to the Free List queue are * committed before we tell the hardware about them. */ wmb(); /* * If we don't have access to the new User Doorbell (T5+), use * the old doorbell mechanism; otherwise use the new BAR2 * mechanism. */ if (unlikely(!q->bar2_addr)) { u32 reg = is_pf4(adap) ? MYPF_REG(A_SGE_PF_KDOORBELL) : T4VF_SGE_BASE_ADDR + A_SGE_VF_KDOORBELL; t4_write_reg_relaxed(adap, reg, val | V_QID(q->cntxt_id)); } else { writel_relaxed(val | V_QID(q->bar2_qid), (void *)((uintptr_t)q->bar2_addr + SGE_UDB_KDOORBELL)); /* * This Write memory Barrier will force the write to * the User Doorbell area to be flushed. */ wmb(); } q->pend_cred &= 7; } } static inline void set_rx_sw_desc(struct rx_sw_desc *sd, void *buf, dma_addr_t mapping) { sd->buf = buf; sd->dma_addr = mapping; /* includes size low bits */ } /** * refill_fl_usembufs - refill an SGE Rx buffer ring with mbufs * @adap: the adapter * @q: the ring to refill * @n: the number of new buffers to allocate * * (Re)populate an SGE free-buffer queue with up to @n new packet buffers, * allocated with the supplied gfp flags. The caller must assure that * @n does not exceed the queue's capacity. If afterwards the queue is * found critically low mark it as starving in the bitmap of starving FLs. * * Returns the number of buffers allocated. */ static unsigned int refill_fl_usembufs(struct adapter *adap, struct sge_fl *q, int n) { struct sge_eth_rxq *rxq = container_of(q, struct sge_eth_rxq, fl); unsigned int cred = q->avail; __be64 *d = &q->desc[q->pidx]; struct rx_sw_desc *sd = &q->sdesc[q->pidx]; unsigned int buf_size_idx = RX_SMALL_MTU_BUF; struct rte_mbuf *buf_bulk[n]; int ret, i; struct rte_pktmbuf_pool_private *mbp_priv; u8 jumbo_en = rxq->rspq.eth_dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_JUMBO_FRAME; /* Use jumbo mtu buffers if mbuf data room size can fit jumbo data. */ mbp_priv = rte_mempool_get_priv(rxq->rspq.mb_pool); if (jumbo_en && ((mbp_priv->mbuf_data_room_size - RTE_PKTMBUF_HEADROOM) >= 9000)) buf_size_idx = RX_LARGE_MTU_BUF; ret = rte_mempool_get_bulk(rxq->rspq.mb_pool, (void *)buf_bulk, n); if (unlikely(ret != 0)) { dev_debug(adap, "%s: failed to allocated fl entries in bulk ..\n", __func__); q->alloc_failed++; rxq->rspq.eth_dev->data->rx_mbuf_alloc_failed++; goto out; } for (i = 0; i < n; i++) { struct rte_mbuf *mbuf = buf_bulk[i]; dma_addr_t mapping; if (!mbuf) { dev_debug(adap, "%s: mbuf alloc failed\n", __func__); q->alloc_failed++; rxq->rspq.eth_dev->data->rx_mbuf_alloc_failed++; goto out; } rte_mbuf_refcnt_set(mbuf, 1); mbuf->data_off = (uint16_t)((char *) RTE_PTR_ALIGN((char *)mbuf->buf_addr + RTE_PKTMBUF_HEADROOM, adap->sge.fl_align) - (char *)mbuf->buf_addr); mbuf->next = NULL; mbuf->nb_segs = 1; mbuf->port = rxq->rspq.port_id; mapping = (dma_addr_t)RTE_ALIGN(mbuf->buf_iova + mbuf->data_off, adap->sge.fl_align); mapping |= buf_size_idx; *d++ = cpu_to_be64(mapping); set_rx_sw_desc(sd, mbuf, mapping); sd++; q->avail++; if (++q->pidx == q->size) { q->pidx = 0; sd = q->sdesc; d = q->desc; } } out: cred = q->avail - cred; q->pend_cred += cred; ring_fl_db(adap, q); if (unlikely(fl_starving(adap, q))) { /* * Make sure data has been written to free list */ wmb(); q->low++; } return cred; } /** * refill_fl - refill an SGE Rx buffer ring with mbufs * @adap: the adapter * @q: the ring to refill * @n: the number of new buffers to allocate * * (Re)populate an SGE free-buffer queue with up to @n new packet buffers, * allocated with the supplied gfp flags. The caller must assure that * @n does not exceed the queue's capacity. Returns the number of buffers * allocated. */ static unsigned int refill_fl(struct adapter *adap, struct sge_fl *q, int n) { return refill_fl_usembufs(adap, q, n); } static inline void __refill_fl(struct adapter *adap, struct sge_fl *fl) { refill_fl(adap, fl, min(MAX_RX_REFILL, fl_cap(fl) - fl->avail)); } /* * Return the number of reclaimable descriptors in a Tx queue. */ static inline int reclaimable(const struct sge_txq *q) { int hw_cidx = ntohs(q->stat->cidx); hw_cidx -= q->cidx; if (hw_cidx < 0) return hw_cidx + q->size; return hw_cidx; } /** * reclaim_completed_tx - reclaims completed Tx descriptors * @q: the Tx queue to reclaim completed descriptors from * * Reclaims Tx descriptors that the SGE has indicated it has processed. */ void reclaim_completed_tx(struct sge_txq *q) { unsigned int avail = reclaimable(q); do { /* reclaim as much as possible */ reclaim_tx_desc(q, avail); q->in_use -= avail; avail = reclaimable(q); } while (avail); } /** * sgl_len - calculates the size of an SGL of the given capacity * @n: the number of SGL entries * * Calculates the number of flits needed for a scatter/gather list that * can hold the given number of entries. */ static inline unsigned int sgl_len(unsigned int n) { /* * A Direct Scatter Gather List uses 32-bit lengths and 64-bit PCI DMA * addresses. The DSGL Work Request starts off with a 32-bit DSGL * ULPTX header, then Length0, then Address0, then, for 1 <= i <= N, * repeated sequences of { Length[i], Length[i+1], Address[i], * Address[i+1] } (this ensures that all addresses are on 64-bit * boundaries). If N is even, then Length[N+1] should be set to 0 and * Address[N+1] is omitted. * * The following calculation incorporates all of the above. It's * somewhat hard to follow but, briefly: the "+2" accounts for the * first two flits which include the DSGL header, Length0 and * Address0; the "(3*(n-1))/2" covers the main body of list entries (3 * flits for every pair of the remaining N) +1 if (n-1) is odd; and * finally the "+((n-1)&1)" adds the one remaining flit needed if * (n-1) is odd ... */ n--; return (3 * n) / 2 + (n & 1) + 2; } /** * flits_to_desc - returns the num of Tx descriptors for the given flits * @n: the number of flits * * Returns the number of Tx descriptors needed for the supplied number * of flits. */ static inline unsigned int flits_to_desc(unsigned int n) { return DIV_ROUND_UP(n, 8); } /** * is_eth_imm - can an Ethernet packet be sent as immediate data? * @m: the packet * * Returns whether an Ethernet packet is small enough to fit as * immediate data. Return value corresponds to the headroom required. */ static inline int is_eth_imm(const struct rte_mbuf *m) { unsigned int hdrlen = (m->ol_flags & PKT_TX_TCP_SEG) ? sizeof(struct cpl_tx_pkt_lso_core) : 0; hdrlen += sizeof(struct cpl_tx_pkt); if (m->pkt_len <= MAX_IMM_TX_PKT_LEN - hdrlen) return hdrlen; return 0; } /** * calc_tx_flits - calculate the number of flits for a packet Tx WR * @m: the packet * @adap: adapter structure pointer * * Returns the number of flits needed for a Tx WR for the given Ethernet * packet, including the needed WR and CPL headers. */ static inline unsigned int calc_tx_flits(const struct rte_mbuf *m, struct adapter *adap) { size_t wr_size = is_pf4(adap) ? sizeof(struct fw_eth_tx_pkt_wr) : sizeof(struct fw_eth_tx_pkt_vm_wr); unsigned int flits; int hdrlen; /* * If the mbuf is small enough, we can pump it out as a work request * with only immediate data. In that case we just have to have the * TX Packet header plus the mbuf data in the Work Request. */ hdrlen = is_eth_imm(m); if (hdrlen) return DIV_ROUND_UP(m->pkt_len + hdrlen, sizeof(__be64)); /* * Otherwise, we're going to have to construct a Scatter gather list * of the mbuf body and fragments. We also include the flits necessary * for the TX Packet Work Request and CPL. We always have a firmware * Write Header (incorporated as part of the cpl_tx_pkt_lso and * cpl_tx_pkt structures), followed by either a TX Packet Write CPL * message or, if we're doing a Large Send Offload, an LSO CPL message * with an embedded TX Packet Write CPL message. */ flits = sgl_len(m->nb_segs); if (m->tso_segsz) flits += (wr_size + sizeof(struct cpl_tx_pkt_lso_core) + sizeof(struct cpl_tx_pkt_core)) / sizeof(__be64); else flits += (wr_size + sizeof(struct cpl_tx_pkt_core)) / sizeof(__be64); return flits; } /** * write_sgl - populate a scatter/gather list for a packet * @mbuf: the packet * @q: the Tx queue we are writing into * @sgl: starting location for writing the SGL * @end: points right after the end of the SGL * @start: start offset into mbuf main-body data to include in the SGL * @addr: address of mapped region * * Generates a scatter/gather list for the buffers that make up a packet. * The caller must provide adequate space for the SGL that will be written. * The SGL includes all of the packet's page fragments and the data in its * main body except for the first @start bytes. @sgl must be 16-byte * aligned and within a Tx descriptor with available space. @end points * write after the end of the SGL but does not account for any potential * wrap around, i.e., @end > @sgl. */ static void write_sgl(struct rte_mbuf *mbuf, struct sge_txq *q, struct ulptx_sgl *sgl, u64 *end, unsigned int start, const dma_addr_t *addr) { unsigned int i, len; struct ulptx_sge_pair *to; struct rte_mbuf *m = mbuf; unsigned int nfrags = m->nb_segs; struct ulptx_sge_pair buf[nfrags / 2]; len = m->data_len - start; sgl->len0 = htonl(len); sgl->addr0 = rte_cpu_to_be_64(addr[0]); sgl->cmd_nsge = htonl(V_ULPTX_CMD(ULP_TX_SC_DSGL) | V_ULPTX_NSGE(nfrags)); if (likely(--nfrags == 0)) return; /* * Most of the complexity below deals with the possibility we hit the * end of the queue in the middle of writing the SGL. For this case * only we create the SGL in a temporary buffer and then copy it. */ to = (u8 *)end > (u8 *)q->stat ? buf : sgl->sge; for (i = 0; nfrags >= 2; nfrags -= 2, to++) { m = m->next; to->len[0] = rte_cpu_to_be_32(m->data_len); to->addr[0] = rte_cpu_to_be_64(addr[++i]); m = m->next; to->len[1] = rte_cpu_to_be_32(m->data_len); to->addr[1] = rte_cpu_to_be_64(addr[++i]); } if (nfrags) { m = m->next; to->len[0] = rte_cpu_to_be_32(m->data_len); to->len[1] = rte_cpu_to_be_32(0); to->addr[0] = rte_cpu_to_be_64(addr[i + 1]); } if (unlikely((u8 *)end > (u8 *)q->stat)) { unsigned int part0 = RTE_PTR_DIFF((u8 *)q->stat, (u8 *)sgl->sge); unsigned int part1; if (likely(part0)) memcpy(sgl->sge, buf, part0); part1 = RTE_PTR_DIFF((u8 *)end, (u8 *)q->stat); rte_memcpy(q->desc, RTE_PTR_ADD((u8 *)buf, part0), part1); end = RTE_PTR_ADD((void *)q->desc, part1); } if ((uintptr_t)end & 8) /* 0-pad to multiple of 16 */ *(u64 *)end = 0; } #define IDXDIFF(head, tail, wrap) \ ((head) >= (tail) ? (head) - (tail) : (wrap) - (tail) + (head)) #define Q_IDXDIFF(q, idx) IDXDIFF((q)->pidx, (q)->idx, (q)->size) #define R_IDXDIFF(q, idx) IDXDIFF((q)->cidx, (q)->idx, (q)->size) #define PIDXDIFF(head, tail, wrap) \ ((tail) >= (head) ? (tail) - (head) : (wrap) - (head) + (tail)) #define P_IDXDIFF(q, idx) PIDXDIFF((q)->cidx, idx, (q)->size) /** * ring_tx_db - ring a Tx queue's doorbell * @adap: the adapter * @q: the Tx queue * @n: number of new descriptors to give to HW * * Ring the doorbel for a Tx queue. */ static inline void ring_tx_db(struct adapter *adap, struct sge_txq *q) { int n = Q_IDXDIFF(q, dbidx); /* * Make sure that all writes to the TX Descriptors are committed * before we tell the hardware about them. */ rte_wmb(); /* * If we don't have access to the new User Doorbell (T5+), use the old * doorbell mechanism; otherwise use the new BAR2 mechanism. */ if (unlikely(!q->bar2_addr)) { u32 val = V_PIDX(n); /* * For T4 we need to participate in the Doorbell Recovery * mechanism. */ if (!q->db_disabled) t4_write_reg(adap, MYPF_REG(A_SGE_PF_KDOORBELL), V_QID(q->cntxt_id) | val); else q->db_pidx_inc += n; q->db_pidx = q->pidx; } else { u32 val = V_PIDX_T5(n); /* * T4 and later chips share the same PIDX field offset within * the doorbell, but T5 and later shrank the field in order to * gain a bit for Doorbell Priority. The field was absurdly * large in the first place (14 bits) so we just use the T5 * and later limits and warn if a Queue ID is too large. */ WARN_ON(val & F_DBPRIO); writel(val | V_QID(q->bar2_qid), (void *)((uintptr_t)q->bar2_addr + SGE_UDB_KDOORBELL)); /* * This Write Memory Barrier will force the write to the User * Doorbell area to be flushed. This is needed to prevent * writes on different CPUs for the same queue from hitting * the adapter out of order. This is required when some Work * Requests take the Write Combine Gather Buffer path (user * doorbell area offset [SGE_UDB_WCDOORBELL..+63]) and some * take the traditional path where we simply increment the * PIDX (User Doorbell area SGE_UDB_KDOORBELL) and have the * hardware DMA read the actual Work Request. */ rte_wmb(); } q->dbidx = q->pidx; } /* * Figure out what HW csum a packet wants and return the appropriate control * bits. */ static u64 hwcsum(enum chip_type chip, const struct rte_mbuf *m) { int csum_type; if (m->ol_flags & PKT_TX_IP_CKSUM) { switch (m->ol_flags & PKT_TX_L4_MASK) { case PKT_TX_TCP_CKSUM: csum_type = TX_CSUM_TCPIP; break; case PKT_TX_UDP_CKSUM: csum_type = TX_CSUM_UDPIP; break; default: goto nocsum; } } else { goto nocsum; } if (likely(csum_type >= TX_CSUM_TCPIP)) { u64 hdr_len = V_TXPKT_IPHDR_LEN(m->l3_len); int eth_hdr_len = m->l2_len; if (CHELSIO_CHIP_VERSION(chip) <= CHELSIO_T5) hdr_len |= V_TXPKT_ETHHDR_LEN(eth_hdr_len); else hdr_len |= V_T6_TXPKT_ETHHDR_LEN(eth_hdr_len); return V_TXPKT_CSUM_TYPE(csum_type) | hdr_len; } nocsum: /* * unknown protocol, disable HW csum * and hope a bad packet is detected */ return F_TXPKT_L4CSUM_DIS; } static inline void txq_advance(struct sge_txq *q, unsigned int n) { q->in_use += n; q->pidx += n; if (q->pidx >= q->size) q->pidx -= q->size; } #define MAX_COALESCE_LEN 64000 static inline int wraps_around(struct sge_txq *q, int ndesc) { return (q->pidx + ndesc) > q->size ? 1 : 0; } static void tx_timer_cb(void *data) { struct adapter *adap = (struct adapter *)data; struct sge_eth_txq *txq = &adap->sge.ethtxq[0]; int i; unsigned int coal_idx; /* monitor any pending tx */ for (i = 0; i < adap->sge.max_ethqsets; i++, txq++) { if (t4_os_trylock(&txq->txq_lock)) { coal_idx = txq->q.coalesce.idx; if (coal_idx) { if (coal_idx == txq->q.last_coal_idx && txq->q.pidx == txq->q.last_pidx) { ship_tx_pkt_coalesce_wr(adap, txq); } else { txq->q.last_coal_idx = coal_idx; txq->q.last_pidx = txq->q.pidx; } } t4_os_unlock(&txq->txq_lock); } } rte_eal_alarm_set(50, tx_timer_cb, (void *)adap); } /** * ship_tx_pkt_coalesce_wr - finalizes and ships a coalesce WR * @ adap: adapter structure * @txq: tx queue * * writes the different fields of the pkts WR and sends it. */ static inline void ship_tx_pkt_coalesce_wr(struct adapter *adap, struct sge_eth_txq *txq) { struct fw_eth_tx_pkts_vm_wr *vmwr; const size_t fw_hdr_copy_len = (sizeof(vmwr->ethmacdst) + sizeof(vmwr->ethmacsrc) + sizeof(vmwr->ethtype) + sizeof(vmwr->vlantci)); struct fw_eth_tx_pkts_wr *wr; struct sge_txq *q = &txq->q; unsigned int ndesc; u32 wr_mid; /* fill the pkts WR header */ wr = (void *)&q->desc[q->pidx]; wr->op_pkd = htonl(V_FW_WR_OP(FW_ETH_TX_PKTS2_WR)); vmwr = (void *)&q->desc[q->pidx]; wr_mid = V_FW_WR_LEN16(DIV_ROUND_UP(q->coalesce.flits, 2)); ndesc = flits_to_desc(q->coalesce.flits); wr->equiq_to_len16 = htonl(wr_mid); wr->plen = cpu_to_be16(q->coalesce.len); wr->npkt = q->coalesce.idx; wr->r3 = 0; if (is_pf4(adap)) { wr->op_pkd = htonl(V_FW_WR_OP(FW_ETH_TX_PKTS2_WR)); wr->type = q->coalesce.type; } else { wr->op_pkd = htonl(V_FW_WR_OP(FW_ETH_TX_PKTS_VM_WR)); vmwr->r4 = 0; memcpy((void *)vmwr->ethmacdst, (void *)q->coalesce.ethmacdst, fw_hdr_copy_len); } /* zero out coalesce structure members */ memset((void *)&q->coalesce, 0, sizeof(struct eth_coalesce)); txq_advance(q, ndesc); txq->stats.coal_wr++; txq->stats.coal_pkts += wr->npkt; if (Q_IDXDIFF(q, equeidx) >= q->size / 2) { q->equeidx = q->pidx; wr_mid |= F_FW_WR_EQUEQ; wr->equiq_to_len16 = htonl(wr_mid); } ring_tx_db(adap, q); } /** * should_tx_packet_coalesce - decides wether to coalesce an mbuf or not * @txq: tx queue where the mbuf is sent * @mbuf: mbuf to be sent * @nflits: return value for number of flits needed * @adap: adapter structure * * This function decides if a packet should be coalesced or not. */ static inline int should_tx_packet_coalesce(struct sge_eth_txq *txq, struct rte_mbuf *mbuf, unsigned int *nflits, struct adapter *adap) { struct fw_eth_tx_pkts_vm_wr *wr; const size_t fw_hdr_copy_len = (sizeof(wr->ethmacdst) + sizeof(wr->ethmacsrc) + sizeof(wr->ethtype) + sizeof(wr->vlantci)); struct sge_txq *q = &txq->q; unsigned int flits, ndesc; unsigned char type = 0; int credits, wr_size; /* use coal WR type 1 when no frags are present */ type = (mbuf->nb_segs == 1) ? 1 : 0; if (!is_pf4(adap)) { if (!type) return 0; if (q->coalesce.idx && memcmp((void *)q->coalesce.ethmacdst, rte_pktmbuf_mtod(mbuf, void *), fw_hdr_copy_len)) ship_tx_pkt_coalesce_wr(adap, txq); } if (unlikely(type != q->coalesce.type && q->coalesce.idx)) ship_tx_pkt_coalesce_wr(adap, txq); /* calculate the number of flits required for coalescing this packet * without the 2 flits of the WR header. These are added further down * if we are just starting in new PKTS WR. sgl_len doesn't account for * the possible 16 bytes alignment ULP TX commands so we do it here. */ flits = (sgl_len(mbuf->nb_segs) + 1) & ~1U; if (type == 0) flits += (sizeof(struct ulp_txpkt) + sizeof(struct ulptx_idata)) / sizeof(__be64); flits += sizeof(struct cpl_tx_pkt_core) / sizeof(__be64); *nflits = flits; /* If coalescing is on, the mbuf is added to a pkts WR */ if (q->coalesce.idx) { ndesc = DIV_ROUND_UP(q->coalesce.flits + flits, 8); credits = txq_avail(q) - ndesc; /* If we are wrapping or this is last mbuf then, send the * already coalesced mbufs and let the non-coalesce pass * handle the mbuf. */ if (unlikely(credits < 0 || wraps_around(q, ndesc))) { ship_tx_pkt_coalesce_wr(adap, txq); return 0; } /* If the max coalesce len or the max WR len is reached * ship the WR and keep coalescing on. */ if (unlikely((q->coalesce.len + mbuf->pkt_len > MAX_COALESCE_LEN) || (q->coalesce.flits + flits > q->coalesce.max))) { ship_tx_pkt_coalesce_wr(adap, txq); goto new; } return 1; } new: /* start a new pkts WR, the WR header is not filled below */ wr_size = is_pf4(adap) ? sizeof(struct fw_eth_tx_pkts_wr) : sizeof(struct fw_eth_tx_pkts_vm_wr); flits += wr_size / sizeof(__be64); ndesc = flits_to_desc(q->coalesce.flits + flits); credits = txq_avail(q) - ndesc; if (unlikely(credits < 0 || wraps_around(q, ndesc))) return 0; q->coalesce.flits += wr_size / sizeof(__be64); q->coalesce.type = type; q->coalesce.ptr = (unsigned char *)&q->desc[q->pidx] + q->coalesce.flits * sizeof(__be64); if (!is_pf4(adap)) memcpy((void *)q->coalesce.ethmacdst, rte_pktmbuf_mtod(mbuf, void *), fw_hdr_copy_len); return 1; } /** * tx_do_packet_coalesce - add an mbuf to a coalesce WR * @txq: sge_eth_txq used send the mbuf * @mbuf: mbuf to be sent * @flits: flits needed for this mbuf * @adap: adapter structure * @pi: port_info structure * @addr: mapped address of the mbuf * * Adds an mbuf to be sent as part of a coalesce WR by filling a * ulp_tx_pkt command, ulp_tx_sc_imm command, cpl message and * ulp_tx_sc_dsgl command. */ static inline int tx_do_packet_coalesce(struct sge_eth_txq *txq, struct rte_mbuf *mbuf, int flits, struct adapter *adap, const struct port_info *pi, dma_addr_t *addr, uint16_t nb_pkts) { u64 cntrl, *end; struct sge_txq *q = &txq->q; struct ulp_txpkt *mc; struct ulptx_idata *sc_imm; struct cpl_tx_pkt_core *cpl; struct tx_sw_desc *sd; unsigned int idx = q->coalesce.idx, len = mbuf->pkt_len; if (q->coalesce.type == 0) { mc = (struct ulp_txpkt *)q->coalesce.ptr; mc->cmd_dest = htonl(V_ULPTX_CMD(4) | V_ULP_TXPKT_DEST(0) | V_ULP_TXPKT_FID(adap->sge.fw_evtq.cntxt_id) | F_ULP_TXPKT_RO); mc->len = htonl(DIV_ROUND_UP(flits, 2)); sc_imm = (struct ulptx_idata *)(mc + 1); sc_imm->cmd_more = htonl(V_ULPTX_CMD(ULP_TX_SC_IMM) | F_ULP_TX_SC_MORE); sc_imm->len = htonl(sizeof(*cpl)); end = (u64 *)mc + flits; cpl = (struct cpl_tx_pkt_core *)(sc_imm + 1); } else { end = (u64 *)q->coalesce.ptr + flits; cpl = (struct cpl_tx_pkt_core *)q->coalesce.ptr; } /* update coalesce structure for this txq */ q->coalesce.flits += flits; q->coalesce.ptr += flits * sizeof(__be64); q->coalesce.len += mbuf->pkt_len; /* fill the cpl message, same as in t4_eth_xmit, this should be kept * similar to t4_eth_xmit */ if (mbuf->ol_flags & PKT_TX_IP_CKSUM) { cntrl = hwcsum(adap->params.chip, mbuf) | F_TXPKT_IPCSUM_DIS; txq->stats.tx_cso++; } else { cntrl = F_TXPKT_L4CSUM_DIS | F_TXPKT_IPCSUM_DIS; } if (mbuf->ol_flags & PKT_TX_VLAN_PKT) { txq->stats.vlan_ins++; cntrl |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(mbuf->vlan_tci); } cpl->ctrl0 = htonl(V_TXPKT_OPCODE(CPL_TX_PKT_XT)); if (is_pf4(adap)) cpl->ctrl0 |= htonl(V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(adap->pf)); else cpl->ctrl0 |= htonl(V_TXPKT_INTF(pi->port_id)); cpl->pack = htons(0); cpl->len = htons(len); cpl->ctrl1 = cpu_to_be64(cntrl); write_sgl(mbuf, q, (struct ulptx_sgl *)(cpl + 1), end, 0, addr); txq->stats.pkts++; txq->stats.tx_bytes += len; sd = &q->sdesc[q->pidx + (idx >> 1)]; if (!(idx & 1)) { if (sd->coalesce.idx) { int i; for (i = 0; i < sd->coalesce.idx; i++) { rte_pktmbuf_free(sd->coalesce.mbuf[i]); sd->coalesce.mbuf[i] = NULL; } } } /* store pointers to the mbuf and the sgl used in free_tx_desc. * each tx desc can hold two pointers corresponding to the value * of ETH_COALESCE_PKT_PER_DESC */ sd->coalesce.mbuf[idx & 1] = mbuf; sd->coalesce.sgl[idx & 1] = (struct ulptx_sgl *)(cpl + 1); sd->coalesce.idx = (idx & 1) + 1; /* Send the coalesced work request, only if max reached. However, * if lower latency is preferred over throughput, then don't wait * for coalescing the next Tx burst and send the packets now. */ q->coalesce.idx++; if (q->coalesce.idx == adap->params.max_tx_coalesce_num || (adap->devargs.tx_mode_latency && q->coalesce.idx >= nb_pkts)) ship_tx_pkt_coalesce_wr(adap, txq); return 0; } /** * t4_eth_xmit - add a packet to an Ethernet Tx queue * @txq: the egress queue * @mbuf: the packet * * Add a packet to an SGE Ethernet Tx queue. Runs with softirqs disabled. */ int t4_eth_xmit(struct sge_eth_txq *txq, struct rte_mbuf *mbuf, uint16_t nb_pkts) { const struct port_info *pi; struct cpl_tx_pkt_lso_core *lso; struct adapter *adap; struct rte_mbuf *m = mbuf; struct fw_eth_tx_pkt_wr *wr; struct fw_eth_tx_pkt_vm_wr *vmwr; struct cpl_tx_pkt_core *cpl; struct tx_sw_desc *d; dma_addr_t addr[m->nb_segs]; unsigned int flits, ndesc, cflits; int l3hdr_len, l4hdr_len, eth_xtra_len; int len, last_desc; int credits; u32 wr_mid; u64 cntrl, *end; bool v6; u32 max_pkt_len = txq->data->dev_conf.rxmode.max_rx_pkt_len; /* Reject xmit if queue is stopped */ if (unlikely(txq->flags & EQ_STOPPED)) return -(EBUSY); /* * The chip min packet length is 10 octets but play safe and reject * anything shorter than an Ethernet header. */ if (unlikely(m->pkt_len < RTE_ETHER_HDR_LEN)) { out_free: rte_pktmbuf_free(m); return 0; } if ((!(m->ol_flags & PKT_TX_TCP_SEG)) && (unlikely(m->pkt_len > max_pkt_len))) goto out_free; pi = txq->data->dev_private; adap = pi->adapter; cntrl = F_TXPKT_L4CSUM_DIS | F_TXPKT_IPCSUM_DIS; /* align the end of coalesce WR to a 512 byte boundary */ txq->q.coalesce.max = (8 - (txq->q.pidx & 7)) * 8; if (!((m->ol_flags & PKT_TX_TCP_SEG) || m->pkt_len > RTE_ETHER_MAX_LEN)) { if (should_tx_packet_coalesce(txq, mbuf, &cflits, adap)) { if (unlikely(map_mbuf(mbuf, addr) < 0)) { dev_warn(adap, "%s: mapping err for coalesce\n", __func__); txq->stats.mapping_err++; goto out_free; } return tx_do_packet_coalesce(txq, mbuf, cflits, adap, pi, addr, nb_pkts); } else { return -EBUSY; } } if (txq->q.coalesce.idx) ship_tx_pkt_coalesce_wr(adap, txq); flits = calc_tx_flits(m, adap); ndesc = flits_to_desc(flits); credits = txq_avail(&txq->q) - ndesc; if (unlikely(credits < 0)) { dev_debug(adap, "%s: Tx ring %u full; credits = %d\n", __func__, txq->q.cntxt_id, credits); return -EBUSY; } if (unlikely(map_mbuf(m, addr) < 0)) { txq->stats.mapping_err++; goto out_free; } wr_mid = V_FW_WR_LEN16(DIV_ROUND_UP(flits, 2)); if (Q_IDXDIFF(&txq->q, equeidx) >= 64) { txq->q.equeidx = txq->q.pidx; wr_mid |= F_FW_WR_EQUEQ; } wr = (void *)&txq->q.desc[txq->q.pidx]; vmwr = (void *)&txq->q.desc[txq->q.pidx]; wr->equiq_to_len16 = htonl(wr_mid); if (is_pf4(adap)) { wr->r3 = rte_cpu_to_be_64(0); end = (u64 *)wr + flits; } else { const size_t fw_hdr_copy_len = (sizeof(vmwr->ethmacdst) + sizeof(vmwr->ethmacsrc) + sizeof(vmwr->ethtype) + sizeof(vmwr->vlantci)); vmwr->r3[0] = rte_cpu_to_be_32(0); vmwr->r3[1] = rte_cpu_to_be_32(0); memcpy((void *)vmwr->ethmacdst, rte_pktmbuf_mtod(m, void *), fw_hdr_copy_len); end = (u64 *)vmwr + flits; } len = 0; len += sizeof(*cpl); /* Coalescing skipped and we send through normal path */ if (!(m->ol_flags & PKT_TX_TCP_SEG)) { wr->op_immdlen = htonl(V_FW_WR_OP(is_pf4(adap) ? FW_ETH_TX_PKT_WR : FW_ETH_TX_PKT_VM_WR) | V_FW_WR_IMMDLEN(len)); if (is_pf4(adap)) cpl = (void *)(wr + 1); else cpl = (void *)(vmwr + 1); if (m->ol_flags & PKT_TX_IP_CKSUM) { cntrl = hwcsum(adap->params.chip, m) | F_TXPKT_IPCSUM_DIS; txq->stats.tx_cso++; } } else { if (is_pf4(adap)) lso = (void *)(wr + 1); else lso = (void *)(vmwr + 1); v6 = (m->ol_flags & PKT_TX_IPV6) != 0; l3hdr_len = m->l3_len; l4hdr_len = m->l4_len; eth_xtra_len = m->l2_len - RTE_ETHER_HDR_LEN; len += sizeof(*lso); wr->op_immdlen = htonl(V_FW_WR_OP(is_pf4(adap) ? FW_ETH_TX_PKT_WR : FW_ETH_TX_PKT_VM_WR) | V_FW_WR_IMMDLEN(len)); lso->lso_ctrl = htonl(V_LSO_OPCODE(CPL_TX_PKT_LSO) | F_LSO_FIRST_SLICE | F_LSO_LAST_SLICE | V_LSO_IPV6(v6) | V_LSO_ETHHDR_LEN(eth_xtra_len / 4) | V_LSO_IPHDR_LEN(l3hdr_len / 4) | V_LSO_TCPHDR_LEN(l4hdr_len / 4)); lso->ipid_ofst = htons(0); lso->mss = htons(m->tso_segsz); lso->seqno_offset = htonl(0); if (is_t4(adap->params.chip)) lso->len = htonl(m->pkt_len); else lso->len = htonl(V_LSO_T5_XFER_SIZE(m->pkt_len)); cpl = (void *)(lso + 1); if (CHELSIO_CHIP_VERSION(adap->params.chip) <= CHELSIO_T5) cntrl = V_TXPKT_ETHHDR_LEN(eth_xtra_len); else cntrl = V_T6_TXPKT_ETHHDR_LEN(eth_xtra_len); cntrl |= V_TXPKT_CSUM_TYPE(v6 ? TX_CSUM_TCPIP6 : TX_CSUM_TCPIP) | V_TXPKT_IPHDR_LEN(l3hdr_len); txq->stats.tso++; txq->stats.tx_cso += m->tso_segsz; } if (m->ol_flags & PKT_TX_VLAN_PKT) { txq->stats.vlan_ins++; cntrl |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(m->vlan_tci); } cpl->ctrl0 = htonl(V_TXPKT_OPCODE(CPL_TX_PKT_XT)); if (is_pf4(adap)) cpl->ctrl0 |= htonl(V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(adap->pf)); else cpl->ctrl0 |= htonl(V_TXPKT_INTF(pi->port_id) | V_TXPKT_PF(0)); cpl->pack = htons(0); cpl->len = htons(m->pkt_len); cpl->ctrl1 = cpu_to_be64(cntrl); txq->stats.pkts++; txq->stats.tx_bytes += m->pkt_len; last_desc = txq->q.pidx + ndesc - 1; if (last_desc >= (int)txq->q.size) last_desc -= txq->q.size; d = &txq->q.sdesc[last_desc]; if (d->coalesce.idx) { int i; for (i = 0; i < d->coalesce.idx; i++) { rte_pktmbuf_free(d->coalesce.mbuf[i]); d->coalesce.mbuf[i] = NULL; } d->coalesce.idx = 0; } write_sgl(m, &txq->q, (struct ulptx_sgl *)(cpl + 1), end, 0, addr); txq->q.sdesc[last_desc].mbuf = m; txq->q.sdesc[last_desc].sgl = (struct ulptx_sgl *)(cpl + 1); txq_advance(&txq->q, ndesc); ring_tx_db(adap, &txq->q); return 0; } /** * reclaim_completed_tx_imm - reclaim completed control-queue Tx descs * @q: the SGE control Tx queue * * This is a variant of reclaim_completed_tx() that is used for Tx queues * that send only immediate data (presently just the control queues) and * thus do not have any mbufs to release. */ static inline void reclaim_completed_tx_imm(struct sge_txq *q) { int hw_cidx = ntohs(q->stat->cidx); int reclaim = hw_cidx - q->cidx; if (reclaim < 0) reclaim += q->size; q->in_use -= reclaim; q->cidx = hw_cidx; } /** * is_imm - check whether a packet can be sent as immediate data * @mbuf: the packet * * Returns true if a packet can be sent as a WR with immediate data. */ static inline int is_imm(const struct rte_mbuf *mbuf) { return mbuf->pkt_len <= MAX_CTRL_WR_LEN; } /** * inline_tx_mbuf: inline a packet's data into TX descriptors * @q: the TX queue where the packet will be inlined * @from: pointer to data portion of packet * @to: pointer after cpl where data has to be inlined * @len: length of data to inline * * Inline a packet's contents directly to TX descriptors, starting at * the given position within the TX DMA ring. * Most of the complexity of this operation is dealing with wrap arounds * in the middle of the packet we want to inline. */ static void inline_tx_mbuf(const struct sge_txq *q, caddr_t from, caddr_t *to, int len) { int left = RTE_PTR_DIFF(q->stat, *to); if (likely((uintptr_t)*to + len <= (uintptr_t)q->stat)) { rte_memcpy(*to, from, len); *to = RTE_PTR_ADD(*to, len); } else { rte_memcpy(*to, from, left); from = RTE_PTR_ADD(from, left); left = len - left; rte_memcpy((void *)q->desc, from, left); *to = RTE_PTR_ADD((void *)q->desc, left); } } /** * ctrl_xmit - send a packet through an SGE control Tx queue * @q: the control queue * @mbuf: the packet * * Send a packet through an SGE control Tx queue. Packets sent through * a control queue must fit entirely as immediate data. */ static int ctrl_xmit(struct sge_ctrl_txq *q, struct rte_mbuf *mbuf) { unsigned int ndesc; struct fw_wr_hdr *wr; caddr_t dst; if (unlikely(!is_imm(mbuf))) { WARN_ON(1); rte_pktmbuf_free(mbuf); return -1; } reclaim_completed_tx_imm(&q->q); ndesc = DIV_ROUND_UP(mbuf->pkt_len, sizeof(struct tx_desc)); t4_os_lock(&q->ctrlq_lock); q->full = txq_avail(&q->q) < ndesc ? 1 : 0; if (unlikely(q->full)) { t4_os_unlock(&q->ctrlq_lock); return -1; } wr = (struct fw_wr_hdr *)&q->q.desc[q->q.pidx]; dst = (void *)wr; inline_tx_mbuf(&q->q, rte_pktmbuf_mtod(mbuf, caddr_t), &dst, mbuf->data_len); txq_advance(&q->q, ndesc); if (unlikely(txq_avail(&q->q) < 64)) wr->lo |= htonl(F_FW_WR_EQUEQ); q->txp++; ring_tx_db(q->adapter, &q->q); t4_os_unlock(&q->ctrlq_lock); rte_pktmbuf_free(mbuf); return 0; } /** * t4_mgmt_tx - send a management message * @q: the control queue * @mbuf: the packet containing the management message * * Send a management message through control queue. */ int t4_mgmt_tx(struct sge_ctrl_txq *q, struct rte_mbuf *mbuf) { return ctrl_xmit(q, mbuf); } /** * alloc_ring - allocate resources for an SGE descriptor ring * @dev: the PCI device's core device * @nelem: the number of descriptors * @elem_size: the size of each descriptor * @sw_size: the size of the SW state associated with each ring element * @phys: the physical address of the allocated ring * @metadata: address of the array holding the SW state for the ring * @stat_size: extra space in HW ring for status information * @node: preferred node for memory allocations * * Allocates resources for an SGE descriptor ring, such as Tx queues, * free buffer lists, or response queues. Each SGE ring requires * space for its HW descriptors plus, optionally, space for the SW state * associated with each HW entry (the metadata). The function returns * three values: the virtual address for the HW ring (the return value * of the function), the bus address of the HW ring, and the address * of the SW ring. */ static void *alloc_ring(size_t nelem, size_t elem_size, size_t sw_size, dma_addr_t *phys, void *metadata, size_t stat_size, __rte_unused uint16_t queue_id, int socket_id, const char *z_name, const char *z_name_sw) { size_t len = CXGBE_MAX_RING_DESC_SIZE * elem_size + stat_size; const struct rte_memzone *tz; void *s = NULL; dev_debug(adapter, "%s: nelem = %zu; elem_size = %zu; sw_size = %zu; " "stat_size = %zu; queue_id = %u; socket_id = %d; z_name = %s;" " z_name_sw = %s\n", __func__, nelem, elem_size, sw_size, stat_size, queue_id, socket_id, z_name, z_name_sw); tz = rte_memzone_lookup(z_name); if (tz) { dev_debug(adapter, "%s: tz exists...returning existing..\n", __func__); goto alloc_sw_ring; } /* * Allocate TX/RX ring hardware descriptors. A memzone large enough to * handle the maximum ring size is allocated in order to allow for * resizing in later calls to the queue setup function. */ tz = rte_memzone_reserve_aligned(z_name, len, socket_id, RTE_MEMZONE_IOVA_CONTIG, 4096); if (!tz) return NULL; alloc_sw_ring: memset(tz->addr, 0, len); if (sw_size) { s = rte_zmalloc_socket(z_name_sw, nelem * sw_size, RTE_CACHE_LINE_SIZE, socket_id); if (!s) { dev_err(adapter, "%s: failed to get sw_ring memory\n", __func__); return NULL; } } if (metadata) *(void **)metadata = s; *phys = (uint64_t)tz->iova; return tz->addr; } #define CXGB4_MSG_AN ((void *)1) /** * rspq_next - advance to the next entry in a response queue * @q: the queue * * Updates the state of a response queue to advance it to the next entry. */ static inline void rspq_next(struct sge_rspq *q) { q->cur_desc = (const __be64 *)((const char *)q->cur_desc + q->iqe_len); if (unlikely(++q->cidx == q->size)) { q->cidx = 0; q->gen ^= 1; q->cur_desc = q->desc; } } static inline void cxgbe_set_mbuf_info(struct rte_mbuf *pkt, uint32_t ptype, uint64_t ol_flags) { pkt->packet_type |= ptype; pkt->ol_flags |= ol_flags; } static inline void cxgbe_fill_mbuf_info(struct adapter *adap, const struct cpl_rx_pkt *cpl, struct rte_mbuf *pkt) { bool csum_ok; u16 err_vec; if (adap->params.tp.rx_pkt_encap) err_vec = G_T6_COMPR_RXERR_VEC(ntohs(cpl->err_vec)); else err_vec = ntohs(cpl->err_vec); csum_ok = cpl->csum_calc && !err_vec; if (cpl->vlan_ex) cxgbe_set_mbuf_info(pkt, RTE_PTYPE_L2_ETHER_VLAN, PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED); else cxgbe_set_mbuf_info(pkt, RTE_PTYPE_L2_ETHER, 0); if (cpl->l2info & htonl(F_RXF_IP)) cxgbe_set_mbuf_info(pkt, RTE_PTYPE_L3_IPV4, csum_ok ? PKT_RX_IP_CKSUM_GOOD : PKT_RX_IP_CKSUM_BAD); else if (cpl->l2info & htonl(F_RXF_IP6)) cxgbe_set_mbuf_info(pkt, RTE_PTYPE_L3_IPV6, csum_ok ? PKT_RX_IP_CKSUM_GOOD : PKT_RX_IP_CKSUM_BAD); if (cpl->l2info & htonl(F_RXF_TCP)) cxgbe_set_mbuf_info(pkt, RTE_PTYPE_L4_TCP, csum_ok ? PKT_RX_L4_CKSUM_GOOD : PKT_RX_L4_CKSUM_BAD); else if (cpl->l2info & htonl(F_RXF_UDP)) cxgbe_set_mbuf_info(pkt, RTE_PTYPE_L4_UDP, csum_ok ? PKT_RX_L4_CKSUM_GOOD : PKT_RX_L4_CKSUM_BAD); } /** * process_responses - process responses from an SGE response queue * @q: the ingress queue to process * @budget: how many responses can be processed in this round * @rx_pkts: mbuf to put the pkts * * Process responses from an SGE response queue up to the supplied budget. * Responses include received packets as well as control messages from FW * or HW. * * Additionally choose the interrupt holdoff time for the next interrupt * on this queue. If the system is under memory shortage use a fairly * long delay to help recovery. */ static int process_responses(struct sge_rspq *q, int budget, struct rte_mbuf **rx_pkts) { int ret = 0, rsp_type; int budget_left = budget; const struct rsp_ctrl *rc; struct sge_eth_rxq *rxq = container_of(q, struct sge_eth_rxq, rspq); while (likely(budget_left)) { if (q->cidx == ntohs(q->stat->pidx)) break; rc = (const struct rsp_ctrl *) ((const char *)q->cur_desc + (q->iqe_len - sizeof(*rc))); /* * Ensure response has been read */ rmb(); rsp_type = G_RSPD_TYPE(rc->u.type_gen); if (likely(rsp_type == X_RSPD_TYPE_FLBUF)) { struct sge *s = &q->adapter->sge; unsigned int stat_pidx; int stat_pidx_diff; stat_pidx = ntohs(q->stat->pidx); stat_pidx_diff = P_IDXDIFF(q, stat_pidx); while (stat_pidx_diff && budget_left) { const struct rx_sw_desc *rsd = &rxq->fl.sdesc[rxq->fl.cidx]; const struct rss_header *rss_hdr = (const void *)q->cur_desc; const struct cpl_rx_pkt *cpl = (const void *)&q->cur_desc[1]; struct rte_mbuf *pkt, *npkt; u32 len, bufsz; rc = (const struct rsp_ctrl *) ((const char *)q->cur_desc + (q->iqe_len - sizeof(*rc))); rsp_type = G_RSPD_TYPE(rc->u.type_gen); if (unlikely(rsp_type != X_RSPD_TYPE_FLBUF)) break; len = ntohl(rc->pldbuflen_qid); BUG_ON(!(len & F_RSPD_NEWBUF)); pkt = rsd->buf; npkt = pkt; len = G_RSPD_LEN(len); pkt->pkt_len = len; /* Chain mbufs into len if necessary */ while (len) { struct rte_mbuf *new_pkt = rsd->buf; bufsz = min(get_buf_size(q->adapter, rsd), len); new_pkt->data_len = bufsz; unmap_rx_buf(&rxq->fl); len -= bufsz; npkt->next = new_pkt; npkt = new_pkt; pkt->nb_segs++; rsd = &rxq->fl.sdesc[rxq->fl.cidx]; } npkt->next = NULL; pkt->nb_segs--; cxgbe_fill_mbuf_info(q->adapter, cpl, pkt); if (!rss_hdr->filter_tid && rss_hdr->hash_type) { pkt->ol_flags |= PKT_RX_RSS_HASH; pkt->hash.rss = ntohl(rss_hdr->hash_val); } if (cpl->vlan_ex) pkt->vlan_tci = ntohs(cpl->vlan); rte_pktmbuf_adj(pkt, s->pktshift); rxq->stats.pkts++; rxq->stats.rx_bytes += pkt->pkt_len; rx_pkts[budget - budget_left] = pkt; rspq_next(q); budget_left--; stat_pidx_diff--; } continue; } else if (likely(rsp_type == X_RSPD_TYPE_CPL)) { ret = q->handler(q, q->cur_desc, NULL); } else { ret = q->handler(q, (const __be64 *)rc, CXGB4_MSG_AN); } if (unlikely(ret)) { /* couldn't process descriptor, back off for recovery */ q->next_intr_params = V_QINTR_TIMER_IDX(NOMEM_TMR_IDX); break; } rspq_next(q); budget_left--; } /* * If this is a Response Queue with an associated Free List and * there's room for another chunk of new Free List buffer pointers, * refill the Free List. */ if (q->offset >= 0 && fl_cap(&rxq->fl) - rxq->fl.avail >= 64) __refill_fl(q->adapter, &rxq->fl); return budget - budget_left; } int cxgbe_poll(struct sge_rspq *q, struct rte_mbuf **rx_pkts, unsigned int budget, unsigned int *work_done) { struct sge_eth_rxq *rxq = container_of(q, struct sge_eth_rxq, rspq); unsigned int cidx_inc; unsigned int params; u32 val; *work_done = process_responses(q, budget, rx_pkts); if (*work_done) { cidx_inc = R_IDXDIFF(q, gts_idx); if (q->offset >= 0 && fl_cap(&rxq->fl) - rxq->fl.avail >= 64) __refill_fl(q->adapter, &rxq->fl); params = q->intr_params; q->next_intr_params = params; val = V_CIDXINC(cidx_inc) | V_SEINTARM(params); if (unlikely(!q->bar2_addr)) { u32 reg = is_pf4(q->adapter) ? MYPF_REG(A_SGE_PF_GTS) : T4VF_SGE_BASE_ADDR + A_SGE_VF_GTS; t4_write_reg(q->adapter, reg, val | V_INGRESSQID((u32)q->cntxt_id)); } else { writel(val | V_INGRESSQID(q->bar2_qid), (void *)((uintptr_t)q->bar2_addr + SGE_UDB_GTS)); /* This Write memory Barrier will force the * write to the User Doorbell area to be * flushed. */ wmb(); } q->gts_idx = q->cidx; } return 0; } /** * bar2_address - return the BAR2 address for an SGE Queue's Registers * @adapter: the adapter * @qid: the SGE Queue ID * @qtype: the SGE Queue Type (Egress or Ingress) * @pbar2_qid: BAR2 Queue ID or 0 for Queue ID inferred SGE Queues * * Returns the BAR2 address for the SGE Queue Registers associated with * @qid. If BAR2 SGE Registers aren't available, returns NULL. Also * returns the BAR2 Queue ID to be used with writes to the BAR2 SGE * Queue Registers. If the BAR2 Queue ID is 0, then "Inferred Queue ID" * Registers are supported (e.g. the Write Combining Doorbell Buffer). */ static void __iomem *bar2_address(struct adapter *adapter, unsigned int qid, enum t4_bar2_qtype qtype, unsigned int *pbar2_qid) { u64 bar2_qoffset; int ret; ret = t4_bar2_sge_qregs(adapter, qid, qtype, &bar2_qoffset, pbar2_qid); if (ret) return NULL; return adapter->bar2 + bar2_qoffset; } int t4_sge_eth_rxq_start(struct adapter *adap, struct sge_rspq *rq) { struct sge_eth_rxq *rxq = container_of(rq, struct sge_eth_rxq, rspq); unsigned int fl_id = rxq->fl.size ? rxq->fl.cntxt_id : 0xffff; return t4_iq_start_stop(adap, adap->mbox, true, adap->pf, 0, rq->cntxt_id, fl_id, 0xffff); } int t4_sge_eth_rxq_stop(struct adapter *adap, struct sge_rspq *rq) { struct sge_eth_rxq *rxq = container_of(rq, struct sge_eth_rxq, rspq); unsigned int fl_id = rxq->fl.size ? rxq->fl.cntxt_id : 0xffff; return t4_iq_start_stop(adap, adap->mbox, false, adap->pf, 0, rq->cntxt_id, fl_id, 0xffff); } /* * @intr_idx: MSI/MSI-X vector if >=0, -(absolute qid + 1) if < 0 * @cong: < 0 -> no congestion feedback, >= 0 -> congestion channel map */ int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq, struct rte_eth_dev *eth_dev, int intr_idx, struct sge_fl *fl, rspq_handler_t hnd, int cong, struct rte_mempool *mp, int queue_id, int socket_id) { int ret, flsz = 0; struct fw_iq_cmd c; struct sge *s = &adap->sge; struct port_info *pi = eth_dev->data->dev_private; char z_name[RTE_MEMZONE_NAMESIZE]; char z_name_sw[RTE_MEMZONE_NAMESIZE]; unsigned int nb_refill; u8 pciechan; /* Size needs to be multiple of 16, including status entry. */ iq->size = cxgbe_roundup(iq->size, 16); snprintf(z_name, sizeof(z_name), "eth_p%d_q%d_%s", eth_dev->data->port_id, queue_id, fwevtq ? "fwq_ring" : "rx_ring"); snprintf(z_name_sw, sizeof(z_name_sw), "%s_sw_ring", z_name); iq->desc = alloc_ring(iq->size, iq->iqe_len, 0, &iq->phys_addr, NULL, 0, queue_id, socket_id, z_name, z_name_sw); if (!iq->desc) return -ENOMEM; memset(&c, 0, sizeof(c)); c.op_to_vfn = htonl(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST | F_FW_CMD_WRITE | F_FW_CMD_EXEC); if (is_pf4(adap)) { pciechan = pi->tx_chan; c.op_to_vfn |= htonl(V_FW_IQ_CMD_PFN(adap->pf) | V_FW_IQ_CMD_VFN(0)); if (cong >= 0) c.iqns_to_fl0congen = htonl(F_FW_IQ_CMD_IQFLINTCONGEN | V_FW_IQ_CMD_IQTYPE(cong ? FW_IQ_IQTYPE_NIC : FW_IQ_IQTYPE_OFLD) | F_FW_IQ_CMD_IQRO); } else { pciechan = pi->port_id; } c.alloc_to_len16 = htonl(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART | (sizeof(c) / 16)); c.type_to_iqandstindex = htonl(V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) | V_FW_IQ_CMD_IQASYNCH(fwevtq) | V_FW_IQ_CMD_VIID(pi->viid) | V_FW_IQ_CMD_IQANDST(intr_idx < 0) | V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_STATUS_PAGE) | V_FW_IQ_CMD_IQANDSTINDEX(intr_idx >= 0 ? intr_idx : -intr_idx - 1)); c.iqdroprss_to_iqesize = htons(V_FW_IQ_CMD_IQPCIECH(pciechan) | F_FW_IQ_CMD_IQGTSMODE | V_FW_IQ_CMD_IQINTCNTTHRESH(iq->pktcnt_idx) | V_FW_IQ_CMD_IQESIZE(ilog2(iq->iqe_len) - 4)); c.iqsize = htons(iq->size); c.iqaddr = cpu_to_be64(iq->phys_addr); if (fl) { struct sge_eth_rxq *rxq = container_of(fl, struct sge_eth_rxq, fl); unsigned int chip_ver = CHELSIO_CHIP_VERSION(adap->params.chip); /* * Allocate the ring for the hardware free list (with space * for its status page) along with the associated software * descriptor ring. The free list size needs to be a multiple * of the Egress Queue Unit and at least 2 Egress Units larger * than the SGE's Egress Congrestion Threshold * (fl_starve_thres - 1). */ if (fl->size < s->fl_starve_thres - 1 + 2 * 8) fl->size = s->fl_starve_thres - 1 + 2 * 8; fl->size = cxgbe_roundup(fl->size, 8); snprintf(z_name, sizeof(z_name), "eth_p%d_q%d_%s", eth_dev->data->port_id, queue_id, fwevtq ? "fwq_ring" : "fl_ring"); snprintf(z_name_sw, sizeof(z_name_sw), "%s_sw_ring", z_name); fl->desc = alloc_ring(fl->size, sizeof(__be64), sizeof(struct rx_sw_desc), &fl->addr, &fl->sdesc, s->stat_len, queue_id, socket_id, z_name, z_name_sw); if (!fl->desc) goto fl_nomem; flsz = fl->size / 8 + s->stat_len / sizeof(struct tx_desc); c.iqns_to_fl0congen |= htonl(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) | (unlikely(rxq->usembufs) ? 0 : F_FW_IQ_CMD_FL0PACKEN) | F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO | F_FW_IQ_CMD_FL0PADEN); if (is_pf4(adap) && cong >= 0) c.iqns_to_fl0congen |= htonl(V_FW_IQ_CMD_FL0CNGCHMAP(cong) | F_FW_IQ_CMD_FL0CONGCIF | F_FW_IQ_CMD_FL0CONGEN); /* In T6, for egress queue type FL there is internal overhead * of 16B for header going into FLM module. * Hence maximum allowed burst size will be 448 bytes. */ c.fl0dcaen_to_fl0cidxfthresh = htons(V_FW_IQ_CMD_FL0FBMIN(chip_ver <= CHELSIO_T5 ? X_FETCHBURSTMIN_128B : X_FETCHBURSTMIN_64B) | V_FW_IQ_CMD_FL0FBMAX(chip_ver <= CHELSIO_T5 ? X_FETCHBURSTMAX_512B : X_FETCHBURSTMAX_256B)); c.fl0size = htons(flsz); c.fl0addr = cpu_to_be64(fl->addr); } if (is_pf4(adap)) ret = t4_wr_mbox(adap, adap->mbox, &c, sizeof(c), &c); else ret = t4vf_wr_mbox(adap, &c, sizeof(c), &c); if (ret) goto err; iq->cur_desc = iq->desc; iq->cidx = 0; iq->gts_idx = 0; iq->gen = 1; iq->next_intr_params = iq->intr_params; iq->cntxt_id = ntohs(c.iqid); iq->abs_id = ntohs(c.physiqid); iq->bar2_addr = bar2_address(adap, iq->cntxt_id, T4_BAR2_QTYPE_INGRESS, &iq->bar2_qid); iq->size--; /* subtract status entry */ iq->stat = (void *)&iq->desc[iq->size * 8]; iq->eth_dev = eth_dev; iq->handler = hnd; iq->port_id = pi->pidx; iq->mb_pool = mp; /* set offset to -1 to distinguish ingress queues without FL */ iq->offset = fl ? 0 : -1; if (fl) { fl->cntxt_id = ntohs(c.fl0id); fl->avail = 0; fl->pend_cred = 0; fl->pidx = 0; fl->cidx = 0; fl->alloc_failed = 0; /* * Note, we must initialize the BAR2 Free List User Doorbell * information before refilling the Free List! */ fl->bar2_addr = bar2_address(adap, fl->cntxt_id, T4_BAR2_QTYPE_EGRESS, &fl->bar2_qid); nb_refill = refill_fl(adap, fl, fl_cap(fl)); if (nb_refill != fl_cap(fl)) { ret = -ENOMEM; dev_err(adap, "%s: mbuf alloc failed with error: %d\n", __func__, ret); goto refill_fl_err; } } /* * For T5 and later we attempt to set up the Congestion Manager values * of the new RX Ethernet Queue. This should really be handled by * firmware because it's more complex than any host driver wants to * get involved with and it's different per chip and this is almost * certainly wrong. Formware would be wrong as well, but it would be * a lot easier to fix in one place ... For now we do something very * simple (and hopefully less wrong). */ if (is_pf4(adap) && !is_t4(adap->params.chip) && cong >= 0) { u32 param, val; int i; param = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) | V_FW_PARAMS_PARAM_YZ(iq->cntxt_id)); if (cong == 0) { val = V_CONMCTXT_CNGTPMODE(X_CONMCTXT_CNGTPMODE_QUEUE); } else { val = V_CONMCTXT_CNGTPMODE( X_CONMCTXT_CNGTPMODE_CHANNEL); for (i = 0; i < 4; i++) { if (cong & (1 << i)) val |= V_CONMCTXT_CNGCHMAP(1 << (i << 2)); } } ret = t4_set_params(adap, adap->mbox, adap->pf, 0, 1, ¶m, &val); if (ret) dev_warn(adap->pdev_dev, "Failed to set Congestion Manager Context for Ingress Queue %d: %d\n", iq->cntxt_id, -ret); } return 0; refill_fl_err: t4_iq_free(adap, adap->mbox, adap->pf, 0, FW_IQ_TYPE_FL_INT_CAP, iq->cntxt_id, fl->cntxt_id, 0xffff); fl_nomem: ret = -ENOMEM; err: iq->cntxt_id = 0; iq->abs_id = 0; if (iq->desc) iq->desc = NULL; if (fl && fl->desc) { rte_free(fl->sdesc); fl->cntxt_id = 0; fl->sdesc = NULL; fl->desc = NULL; } return ret; } static void init_txq(struct adapter *adap, struct sge_txq *q, unsigned int id, unsigned int abs_id) { q->cntxt_id = id; q->abs_id = abs_id; q->bar2_addr = bar2_address(adap, q->cntxt_id, T4_BAR2_QTYPE_EGRESS, &q->bar2_qid); q->cidx = 0; q->pidx = 0; q->dbidx = 0; q->in_use = 0; q->equeidx = 0; q->coalesce.idx = 0; q->coalesce.len = 0; q->coalesce.flits = 0; q->last_coal_idx = 0; q->last_pidx = 0; q->stat = (void *)&q->desc[q->size]; } int t4_sge_eth_txq_start(struct sge_eth_txq *txq) { /* * TODO: For flow-control, queue may be stopped waiting to reclaim * credits. * Ensure queue is in EQ_STOPPED state before starting it. */ if (!(txq->flags & EQ_STOPPED)) return -(EBUSY); txq->flags &= ~EQ_STOPPED; return 0; } int t4_sge_eth_txq_stop(struct sge_eth_txq *txq) { txq->flags |= EQ_STOPPED; return 0; } int t4_sge_alloc_eth_txq(struct adapter *adap, struct sge_eth_txq *txq, struct rte_eth_dev *eth_dev, uint16_t queue_id, unsigned int iqid, int socket_id) { int ret, nentries; struct fw_eq_eth_cmd c; struct sge *s = &adap->sge; struct port_info *pi = eth_dev->data->dev_private; char z_name[RTE_MEMZONE_NAMESIZE]; char z_name_sw[RTE_MEMZONE_NAMESIZE]; u8 pciechan; /* Add status entries */ nentries = txq->q.size + s->stat_len / sizeof(struct tx_desc); snprintf(z_name, sizeof(z_name), "eth_p%d_q%d_%s", eth_dev->data->port_id, queue_id, "tx_ring"); snprintf(z_name_sw, sizeof(z_name_sw), "%s_sw_ring", z_name); txq->q.desc = alloc_ring(txq->q.size, sizeof(struct tx_desc), sizeof(struct tx_sw_desc), &txq->q.phys_addr, &txq->q.sdesc, s->stat_len, queue_id, socket_id, z_name, z_name_sw); if (!txq->q.desc) return -ENOMEM; memset(&c, 0, sizeof(c)); c.op_to_vfn = htonl(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST | F_FW_CMD_WRITE | F_FW_CMD_EXEC); if (is_pf4(adap)) { pciechan = pi->tx_chan; c.op_to_vfn |= htonl(V_FW_EQ_ETH_CMD_PFN(adap->pf) | V_FW_EQ_ETH_CMD_VFN(0)); } else { pciechan = pi->port_id; } c.alloc_to_len16 = htonl(F_FW_EQ_ETH_CMD_ALLOC | F_FW_EQ_ETH_CMD_EQSTART | (sizeof(c) / 16)); c.autoequiqe_to_viid = htonl(F_FW_EQ_ETH_CMD_AUTOEQUEQE | V_FW_EQ_ETH_CMD_VIID(pi->viid)); c.fetchszm_to_iqid = htonl(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) | V_FW_EQ_ETH_CMD_PCIECHN(pciechan) | F_FW_EQ_ETH_CMD_FETCHRO | V_FW_EQ_ETH_CMD_IQID(iqid)); c.dcaen_to_eqsize = htonl(V_FW_EQ_ETH_CMD_FBMIN(X_FETCHBURSTMIN_64B) | V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) | V_FW_EQ_ETH_CMD_EQSIZE(nentries)); c.eqaddr = rte_cpu_to_be_64(txq->q.phys_addr); if (is_pf4(adap)) ret = t4_wr_mbox(adap, adap->mbox, &c, sizeof(c), &c); else ret = t4vf_wr_mbox(adap, &c, sizeof(c), &c); if (ret) { rte_free(txq->q.sdesc); txq->q.sdesc = NULL; txq->q.desc = NULL; return ret; } init_txq(adap, &txq->q, G_FW_EQ_ETH_CMD_EQID(ntohl(c.eqid_pkd)), G_FW_EQ_ETH_CMD_PHYSEQID(ntohl(c.physeqid_pkd))); txq->stats.tso = 0; txq->stats.pkts = 0; txq->stats.tx_cso = 0; txq->stats.coal_wr = 0; txq->stats.vlan_ins = 0; txq->stats.tx_bytes = 0; txq->stats.coal_pkts = 0; txq->stats.mapping_err = 0; txq->flags |= EQ_STOPPED; txq->eth_dev = eth_dev; txq->data = eth_dev->data; t4_os_lock_init(&txq->txq_lock); return 0; } int t4_sge_alloc_ctrl_txq(struct adapter *adap, struct sge_ctrl_txq *txq, struct rte_eth_dev *eth_dev, uint16_t queue_id, unsigned int iqid, int socket_id) { int ret, nentries; struct fw_eq_ctrl_cmd c; struct sge *s = &adap->sge; struct port_info *pi = eth_dev->data->dev_private; char z_name[RTE_MEMZONE_NAMESIZE]; char z_name_sw[RTE_MEMZONE_NAMESIZE]; /* Add status entries */ nentries = txq->q.size + s->stat_len / sizeof(struct tx_desc); snprintf(z_name, sizeof(z_name), "eth_p%d_q%d_%s", eth_dev->data->port_id, queue_id, "ctrl_tx_ring"); snprintf(z_name_sw, sizeof(z_name_sw), "%s_sw_ring", z_name); txq->q.desc = alloc_ring(txq->q.size, sizeof(struct tx_desc), 0, &txq->q.phys_addr, NULL, 0, queue_id, socket_id, z_name, z_name_sw); if (!txq->q.desc) return -ENOMEM; memset(&c, 0, sizeof(c)); c.op_to_vfn = htonl(V_FW_CMD_OP(FW_EQ_CTRL_CMD) | F_FW_CMD_REQUEST | F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_CTRL_CMD_PFN(adap->pf) | V_FW_EQ_CTRL_CMD_VFN(0)); c.alloc_to_len16 = htonl(F_FW_EQ_CTRL_CMD_ALLOC | F_FW_EQ_CTRL_CMD_EQSTART | (sizeof(c) / 16)); c.cmpliqid_eqid = htonl(V_FW_EQ_CTRL_CMD_CMPLIQID(0)); c.physeqid_pkd = htonl(0); c.fetchszm_to_iqid = htonl(V_FW_EQ_CTRL_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) | V_FW_EQ_CTRL_CMD_PCIECHN(pi->tx_chan) | F_FW_EQ_CTRL_CMD_FETCHRO | V_FW_EQ_CTRL_CMD_IQID(iqid)); c.dcaen_to_eqsize = htonl(V_FW_EQ_CTRL_CMD_FBMIN(X_FETCHBURSTMIN_64B) | V_FW_EQ_CTRL_CMD_FBMAX(X_FETCHBURSTMAX_512B) | V_FW_EQ_CTRL_CMD_EQSIZE(nentries)); c.eqaddr = cpu_to_be64(txq->q.phys_addr); ret = t4_wr_mbox(adap, adap->mbox, &c, sizeof(c), &c); if (ret) { txq->q.desc = NULL; return ret; } init_txq(adap, &txq->q, G_FW_EQ_CTRL_CMD_EQID(ntohl(c.cmpliqid_eqid)), G_FW_EQ_CTRL_CMD_EQID(ntohl(c. physeqid_pkd))); txq->adapter = adap; txq->full = 0; return 0; } static void free_txq(struct sge_txq *q) { q->cntxt_id = 0; q->sdesc = NULL; q->desc = NULL; } static void free_rspq_fl(struct adapter *adap, struct sge_rspq *rq, struct sge_fl *fl) { unsigned int fl_id = fl ? fl->cntxt_id : 0xffff; t4_iq_free(adap, adap->mbox, adap->pf, 0, FW_IQ_TYPE_FL_INT_CAP, rq->cntxt_id, fl_id, 0xffff); rq->cntxt_id = 0; rq->abs_id = 0; rq->desc = NULL; if (fl) { free_rx_bufs(fl, fl->avail); rte_free(fl->sdesc); fl->sdesc = NULL; fl->cntxt_id = 0; fl->desc = NULL; } } /* * Clear all queues of the port * * Note: This function must only be called after rx and tx path * of the port have been disabled. */ void t4_sge_eth_clear_queues(struct port_info *pi) { int i; struct adapter *adap = pi->adapter; struct sge_eth_rxq *rxq = &adap->sge.ethrxq[pi->first_qset]; struct sge_eth_txq *txq = &adap->sge.ethtxq[pi->first_qset]; for (i = 0; i < pi->n_rx_qsets; i++, rxq++) { if (rxq->rspq.desc) t4_sge_eth_rxq_stop(adap, &rxq->rspq); } for (i = 0; i < pi->n_tx_qsets; i++, txq++) { if (txq->q.desc) { struct sge_txq *q = &txq->q; t4_sge_eth_txq_stop(txq); reclaim_completed_tx(q); free_tx_desc(q, q->size); q->equeidx = q->pidx; } } } void t4_sge_eth_rxq_release(struct adapter *adap, struct sge_eth_rxq *rxq) { if (rxq->rspq.desc) { t4_sge_eth_rxq_stop(adap, &rxq->rspq); free_rspq_fl(adap, &rxq->rspq, rxq->fl.size ? &rxq->fl : NULL); } } void t4_sge_eth_txq_release(struct adapter *adap, struct sge_eth_txq *txq) { if (txq->q.desc) { t4_sge_eth_txq_stop(txq); reclaim_completed_tx(&txq->q); t4_eth_eq_free(adap, adap->mbox, adap->pf, 0, txq->q.cntxt_id); free_tx_desc(&txq->q, txq->q.size); rte_free(txq->q.sdesc); free_txq(&txq->q); } } void t4_sge_tx_monitor_start(struct adapter *adap) { rte_eal_alarm_set(50, tx_timer_cb, (void *)adap); } void t4_sge_tx_monitor_stop(struct adapter *adap) { rte_eal_alarm_cancel(tx_timer_cb, (void *)adap); } /** * t4_free_sge_resources - free SGE resources * @adap: the adapter * * Frees resources used by the SGE queue sets. */ void t4_free_sge_resources(struct adapter *adap) { unsigned int i; struct sge_eth_rxq *rxq = &adap->sge.ethrxq[0]; struct sge_eth_txq *txq = &adap->sge.ethtxq[0]; /* clean up Ethernet Tx/Rx queues */ for (i = 0; i < adap->sge.max_ethqsets; i++, rxq++, txq++) { /* Free only the queues allocated */ if (rxq->rspq.desc) { t4_sge_eth_rxq_release(adap, rxq); rxq->rspq.eth_dev = NULL; } if (txq->q.desc) { t4_sge_eth_txq_release(adap, txq); txq->eth_dev = NULL; } } /* clean up control Tx queues */ for (i = 0; i < ARRAY_SIZE(adap->sge.ctrlq); i++) { struct sge_ctrl_txq *cq = &adap->sge.ctrlq[i]; if (cq->q.desc) { reclaim_completed_tx_imm(&cq->q); t4_ctrl_eq_free(adap, adap->mbox, adap->pf, 0, cq->q.cntxt_id); free_txq(&cq->q); } } if (adap->sge.fw_evtq.desc) free_rspq_fl(adap, &adap->sge.fw_evtq, NULL); } /** * t4_sge_init - initialize SGE * @adap: the adapter * * Performs SGE initialization needed every time after a chip reset. * We do not initialize any of the queues here, instead the driver * top-level must request those individually. * * Called in two different modes: * * 1. Perform actual hardware initialization and record hard-coded * parameters which were used. This gets used when we're the * Master PF and the Firmware Configuration File support didn't * work for some reason. * * 2. We're not the Master PF or initialization was performed with * a Firmware Configuration File. In this case we need to grab * any of the SGE operating parameters that we need to have in * order to do our job and make sure we can live with them ... */ static int t4_sge_init_soft(struct adapter *adap) { struct sge *s = &adap->sge; u32 fl_small_pg, fl_large_pg, fl_small_mtu, fl_large_mtu; u32 timer_value_0_and_1, timer_value_2_and_3, timer_value_4_and_5; u32 ingress_rx_threshold; /* * Verify that CPL messages are going to the Ingress Queue for * process_responses() and that only packet data is going to the * Free Lists. */ if ((t4_read_reg(adap, A_SGE_CONTROL) & F_RXPKTCPLMODE) != V_RXPKTCPLMODE(X_RXPKTCPLMODE_SPLIT)) { dev_err(adap, "bad SGE CPL MODE\n"); return -EINVAL; } /* * Validate the Host Buffer Register Array indices that we want to * use ... * * XXX Note that we should really read through the Host Buffer Size * XXX register array and find the indices of the Buffer Sizes which * XXX meet our needs! */ #define READ_FL_BUF(x) \ t4_read_reg(adap, A_SGE_FL_BUFFER_SIZE0 + (x) * sizeof(u32)) fl_small_pg = READ_FL_BUF(RX_SMALL_PG_BUF); fl_large_pg = READ_FL_BUF(RX_LARGE_PG_BUF); fl_small_mtu = READ_FL_BUF(RX_SMALL_MTU_BUF); fl_large_mtu = READ_FL_BUF(RX_LARGE_MTU_BUF); /* * We only bother using the Large Page logic if the Large Page Buffer * is larger than our Page Size Buffer. */ if (fl_large_pg <= fl_small_pg) fl_large_pg = 0; #undef READ_FL_BUF /* * The Page Size Buffer must be exactly equal to our Page Size and the * Large Page Size Buffer should be 0 (per above) or a power of 2. */ if (fl_small_pg != CXGBE_PAGE_SIZE || (fl_large_pg & (fl_large_pg - 1)) != 0) { dev_err(adap, "bad SGE FL page buffer sizes [%d, %d]\n", fl_small_pg, fl_large_pg); return -EINVAL; } if (fl_large_pg) s->fl_pg_order = ilog2(fl_large_pg) - PAGE_SHIFT; if (adap->use_unpacked_mode) { int err = 0; if (fl_small_mtu < FL_MTU_SMALL_BUFSIZE(adap)) { dev_err(adap, "bad SGE FL small MTU %d\n", fl_small_mtu); err = -EINVAL; } if (fl_large_mtu < FL_MTU_LARGE_BUFSIZE(adap)) { dev_err(adap, "bad SGE FL large MTU %d\n", fl_large_mtu); err = -EINVAL; } if (err) return err; } /* * Retrieve our RX interrupt holdoff timer values and counter * threshold values from the SGE parameters. */ timer_value_0_and_1 = t4_read_reg(adap, A_SGE_TIMER_VALUE_0_AND_1); timer_value_2_and_3 = t4_read_reg(adap, A_SGE_TIMER_VALUE_2_AND_3); timer_value_4_and_5 = t4_read_reg(adap, A_SGE_TIMER_VALUE_4_AND_5); s->timer_val[0] = core_ticks_to_us(adap, G_TIMERVALUE0(timer_value_0_and_1)); s->timer_val[1] = core_ticks_to_us(adap, G_TIMERVALUE1(timer_value_0_and_1)); s->timer_val[2] = core_ticks_to_us(adap, G_TIMERVALUE2(timer_value_2_and_3)); s->timer_val[3] = core_ticks_to_us(adap, G_TIMERVALUE3(timer_value_2_and_3)); s->timer_val[4] = core_ticks_to_us(adap, G_TIMERVALUE4(timer_value_4_and_5)); s->timer_val[5] = core_ticks_to_us(adap, G_TIMERVALUE5(timer_value_4_and_5)); ingress_rx_threshold = t4_read_reg(adap, A_SGE_INGRESS_RX_THRESHOLD); s->counter_val[0] = G_THRESHOLD_0(ingress_rx_threshold); s->counter_val[1] = G_THRESHOLD_1(ingress_rx_threshold); s->counter_val[2] = G_THRESHOLD_2(ingress_rx_threshold); s->counter_val[3] = G_THRESHOLD_3(ingress_rx_threshold); return 0; } int t4_sge_init(struct adapter *adap) { struct sge *s = &adap->sge; u32 sge_control, sge_conm_ctrl; int ret, egress_threshold; /* * Ingress Padding Boundary and Egress Status Page Size are set up by * t4_fixup_host_params(). */ sge_control = t4_read_reg(adap, A_SGE_CONTROL); s->pktshift = G_PKTSHIFT(sge_control); s->stat_len = (sge_control & F_EGRSTATUSPAGESIZE) ? 128 : 64; s->fl_align = t4_fl_pkt_align(adap); ret = t4_sge_init_soft(adap); if (ret < 0) { dev_err(adap, "%s: t4_sge_init_soft failed, error %d\n", __func__, -ret); return ret; } /* * A FL with <= fl_starve_thres buffers is starving and a periodic * timer will attempt to refill it. This needs to be larger than the * SGE's Egress Congestion Threshold. If it isn't, then we can get * stuck waiting for new packets while the SGE is waiting for us to * give it more Free List entries. (Note that the SGE's Egress * Congestion Threshold is in units of 2 Free List pointers.) For T4, * there was only a single field to control this. For T5 there's the * original field which now only applies to Unpacked Mode Free List * buffers and a new field which only applies to Packed Mode Free List * buffers. */ sge_conm_ctrl = t4_read_reg(adap, A_SGE_CONM_CTRL); if (is_t4(adap->params.chip) || adap->use_unpacked_mode) egress_threshold = G_EGRTHRESHOLD(sge_conm_ctrl); else egress_threshold = G_EGRTHRESHOLDPACKING(sge_conm_ctrl); s->fl_starve_thres = 2 * egress_threshold + 1; return 0; } int t4vf_sge_init(struct adapter *adap) { struct sge_params *sge_params = &adap->params.sge; u32 sge_ingress_queues_per_page; u32 sge_egress_queues_per_page; u32 sge_control, sge_control2; u32 fl_small_pg, fl_large_pg; u32 sge_ingress_rx_threshold; u32 sge_timer_value_0_and_1; u32 sge_timer_value_2_and_3; u32 sge_timer_value_4_and_5; u32 sge_congestion_control; struct sge *s = &adap->sge; unsigned int s_hps, s_qpp; u32 sge_host_page_size; u32 params[7], vals[7]; int v; /* query basic params from fw */ params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_CONTROL)); params[1] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_HOST_PAGE_SIZE)); params[2] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_FL_BUFFER_SIZE0)); params[3] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_FL_BUFFER_SIZE1)); params[4] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_TIMER_VALUE_0_AND_1)); params[5] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_TIMER_VALUE_2_AND_3)); params[6] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_TIMER_VALUE_4_AND_5)); v = t4vf_query_params(adap, 7, params, vals); if (v != FW_SUCCESS) return v; sge_control = vals[0]; sge_host_page_size = vals[1]; fl_small_pg = vals[2]; fl_large_pg = vals[3]; sge_timer_value_0_and_1 = vals[4]; sge_timer_value_2_and_3 = vals[5]; sge_timer_value_4_and_5 = vals[6]; /* * Start by vetting the basic SGE parameters which have been set up by * the Physical Function Driver. */ /* We only bother using the Large Page logic if the Large Page Buffer * is larger than our Page Size Buffer. */ if (fl_large_pg <= fl_small_pg) fl_large_pg = 0; /* The Page Size Buffer must be exactly equal to our Page Size and the * Large Page Size Buffer should be 0 (per above) or a power of 2. */ if (fl_small_pg != CXGBE_PAGE_SIZE || (fl_large_pg & (fl_large_pg - 1)) != 0) { dev_err(adapter->pdev_dev, "bad SGE FL buffer sizes [%d, %d]\n", fl_small_pg, fl_large_pg); return -EINVAL; } if ((sge_control & F_RXPKTCPLMODE) != V_RXPKTCPLMODE(X_RXPKTCPLMODE_SPLIT)) { dev_err(adapter->pdev_dev, "bad SGE CPL MODE\n"); return -EINVAL; } /* Grab ingress packing boundary from SGE_CONTROL2 for */ params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_CONTROL2)); v = t4vf_query_params(adap, 1, params, vals); if (v != FW_SUCCESS) { dev_err(adapter, "Unable to get SGE Control2; " "probably old firmware.\n"); return v; } sge_control2 = vals[0]; params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_INGRESS_RX_THRESHOLD)); params[1] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_CONM_CTRL)); v = t4vf_query_params(adap, 2, params, vals); if (v != FW_SUCCESS) return v; sge_ingress_rx_threshold = vals[0]; sge_congestion_control = vals[1]; params[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_EGRESS_QUEUES_PER_PAGE_VF)); params[1] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_REG) | V_FW_PARAMS_PARAM_XYZ(A_SGE_INGRESS_QUEUES_PER_PAGE_VF)); v = t4vf_query_params(adap, 2, params, vals); if (v != FW_SUCCESS) { dev_warn(adap, "Unable to get VF SGE Queues/Page; " "probably old firmware.\n"); return v; } sge_egress_queues_per_page = vals[0]; sge_ingress_queues_per_page = vals[1]; /* * We need the Queues/Page for our VF. This is based on the * PF from which we're instantiated and is indexed in the * register we just read. */ s_hps = (S_HOSTPAGESIZEPF0 + (S_HOSTPAGESIZEPF1 - S_HOSTPAGESIZEPF0) * adap->pf); sge_params->hps = ((sge_host_page_size >> s_hps) & M_HOSTPAGESIZEPF0); s_qpp = (S_QUEUESPERPAGEPF0 + (S_QUEUESPERPAGEPF1 - S_QUEUESPERPAGEPF0) * adap->pf); sge_params->eq_qpp = ((sge_egress_queues_per_page >> s_qpp) & M_QUEUESPERPAGEPF0); sge_params->iq_qpp = ((sge_ingress_queues_per_page >> s_qpp) & M_QUEUESPERPAGEPF0); /* * Now translate the queried parameters into our internal forms. */ if (fl_large_pg) s->fl_pg_order = ilog2(fl_large_pg) - PAGE_SHIFT; s->stat_len = ((sge_control & F_EGRSTATUSPAGESIZE) ? 128 : 64); s->pktshift = G_PKTSHIFT(sge_control); s->fl_align = t4vf_fl_pkt_align(adap, sge_control, sge_control2); /* * A FL with <= fl_starve_thres buffers is starving and a periodic * timer will attempt to refill it. This needs to be larger than the * SGE's Egress Congestion Threshold. If it isn't, then we can get * stuck waiting for new packets while the SGE is waiting for us to * give it more Free List entries. (Note that the SGE's Egress * Congestion Threshold is in units of 2 Free List pointers.) */ switch (CHELSIO_CHIP_VERSION(adap->params.chip)) { case CHELSIO_T5: s->fl_starve_thres = G_EGRTHRESHOLDPACKING(sge_congestion_control); break; case CHELSIO_T6: default: s->fl_starve_thres = G_T6_EGRTHRESHOLDPACKING(sge_congestion_control); break; } s->fl_starve_thres = s->fl_starve_thres * 2 + 1; /* * Save RX interrupt holdoff timer values and counter * threshold values from the SGE parameters. */ s->timer_val[0] = core_ticks_to_us(adap, G_TIMERVALUE0(sge_timer_value_0_and_1)); s->timer_val[1] = core_ticks_to_us(adap, G_TIMERVALUE1(sge_timer_value_0_and_1)); s->timer_val[2] = core_ticks_to_us(adap, G_TIMERVALUE2(sge_timer_value_2_and_3)); s->timer_val[3] = core_ticks_to_us(adap, G_TIMERVALUE3(sge_timer_value_2_and_3)); s->timer_val[4] = core_ticks_to_us(adap, G_TIMERVALUE4(sge_timer_value_4_and_5)); s->timer_val[5] = core_ticks_to_us(adap, G_TIMERVALUE5(sge_timer_value_4_and_5)); s->counter_val[0] = G_THRESHOLD_0(sge_ingress_rx_threshold); s->counter_val[1] = G_THRESHOLD_1(sge_ingress_rx_threshold); s->counter_val[2] = G_THRESHOLD_2(sge_ingress_rx_threshold); s->counter_val[3] = G_THRESHOLD_3(sge_ingress_rx_threshold); return 0; }