54e4ee7163
MFC after: 3 weeks
2393 lines
59 KiB
C
2393 lines
59 KiB
C
/*-
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* Copyright (c) 2011 Chelsio Communications, Inc.
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* All rights reserved.
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* Written by: Navdeep Parhar <np@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include <sys/types.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_vlan_var.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/tcp.h>
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#include "common/common.h"
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#include "common/t4_regs.h"
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#include "common/t4_regs_values.h"
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#include "common/t4_msg.h"
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#include "common/t4fw_interface.h"
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struct fl_buf_info {
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int size;
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int type;
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uma_zone_t zone;
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};
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/* t4_sge_init will fill up the zone */
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static struct fl_buf_info fl_buf_info[FL_BUF_SIZES] = {
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{ MCLBYTES, EXT_CLUSTER, NULL},
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{ MJUMPAGESIZE, EXT_JUMBOP, NULL},
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{ MJUM9BYTES, EXT_JUMBO9, NULL},
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{ MJUM16BYTES, EXT_JUMBO16, NULL}
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};
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#define FL_BUF_SIZE(x) (fl_buf_info[x].size)
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#define FL_BUF_TYPE(x) (fl_buf_info[x].type)
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#define FL_BUF_ZONE(x) (fl_buf_info[x].zone)
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enum {
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FL_PKTSHIFT = 2
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};
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#define FL_ALIGN min(CACHE_LINE_SIZE, 32)
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#if CACHE_LINE_SIZE > 64
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#define SPG_LEN 128
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#else
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#define SPG_LEN 64
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#endif
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/* Used to track coalesced tx work request */
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struct txpkts {
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uint64_t *flitp; /* ptr to flit where next pkt should start */
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uint8_t npkt; /* # of packets in this work request */
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uint8_t nflits; /* # of flits used by this work request */
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uint16_t plen; /* total payload (sum of all packets) */
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};
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/* A packet's SGL. This + m_pkthdr has all info needed for tx */
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struct sgl {
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int nsegs; /* # of segments in the SGL, 0 means imm. tx */
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int nflits; /* # of flits needed for the SGL */
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bus_dma_segment_t seg[TX_SGL_SEGS];
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};
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static inline void init_iq(struct sge_iq *, struct adapter *, int, int, int,
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int, iq_intr_handler_t *, char *);
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static inline void init_fl(struct sge_fl *, int, char *);
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static inline void init_txq(struct sge_txq *, int, char *);
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static int alloc_ring(struct adapter *, size_t, bus_dma_tag_t *, bus_dmamap_t *,
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bus_addr_t *, void **);
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static int free_ring(struct adapter *, bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
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void *);
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static int alloc_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *,
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int);
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static int free_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *);
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static int alloc_iq(struct sge_iq *, int);
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static int free_iq(struct sge_iq *);
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static int alloc_rxq(struct port_info *, struct sge_rxq *, int, int);
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static int free_rxq(struct port_info *, struct sge_rxq *);
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static int alloc_txq(struct port_info *, struct sge_txq *, int);
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static int free_txq(struct port_info *, struct sge_txq *);
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static void oneseg_dma_callback(void *, bus_dma_segment_t *, int, int);
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static inline bool is_new_response(const struct sge_iq *, struct rsp_ctrl **);
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static inline void iq_next(struct sge_iq *);
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static inline void ring_fl_db(struct adapter *, struct sge_fl *);
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static void refill_fl(struct sge_fl *, int);
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static int alloc_fl_sdesc(struct sge_fl *);
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static void free_fl_sdesc(struct sge_fl *);
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static int alloc_eq_maps(struct sge_eq *);
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static void free_eq_maps(struct sge_eq *);
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static struct mbuf *get_fl_sdesc_data(struct sge_fl *, int, int);
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static void set_fl_tag_idx(struct sge_fl *, int);
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static int get_pkt_sgl(struct sge_txq *, struct mbuf **, struct sgl *, int);
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static int free_pkt_sgl(struct sge_txq *, struct sgl *);
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static int write_txpkt_wr(struct port_info *, struct sge_txq *, struct mbuf *,
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struct sgl *);
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static int add_to_txpkts(struct port_info *, struct sge_txq *, struct txpkts *,
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struct mbuf *, struct sgl *);
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static void write_txpkts_wr(struct sge_txq *, struct txpkts *);
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static inline void write_ulp_cpl_sgl(struct port_info *, struct sge_txq *,
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struct txpkts *, struct mbuf *, struct sgl *);
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static int write_sgl_to_txd(struct sge_eq *, struct sgl *, caddr_t *);
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static inline void copy_to_txd(struct sge_eq *, caddr_t, caddr_t *, int);
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static inline void ring_tx_db(struct adapter *, struct sge_eq *);
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static int reclaim_tx_descs(struct sge_eq *, int, int);
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static void write_eqflush_wr(struct sge_eq *);
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static __be64 get_flit(bus_dma_segment_t *, int, int);
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/**
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* t4_sge_init - initialize SGE
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* @sc: the adapter
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*
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* Performs SGE initialization needed every time after a chip reset.
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* We do not initialize any of the queues here, instead the driver
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* top-level must request them individually.
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*/
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void
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t4_sge_init(struct adapter *sc)
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{
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struct sge *s = &sc->sge;
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int i;
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FL_BUF_ZONE(0) = zone_clust;
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FL_BUF_ZONE(1) = zone_jumbop;
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FL_BUF_ZONE(2) = zone_jumbo9;
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FL_BUF_ZONE(3) = zone_jumbo16;
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t4_set_reg_field(sc, A_SGE_CONTROL, V_PKTSHIFT(M_PKTSHIFT) |
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V_INGPADBOUNDARY(M_INGPADBOUNDARY) |
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F_EGRSTATUSPAGESIZE,
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V_INGPADBOUNDARY(ilog2(FL_ALIGN) - 5) |
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V_PKTSHIFT(FL_PKTSHIFT) |
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F_RXPKTCPLMODE |
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V_EGRSTATUSPAGESIZE(SPG_LEN == 128));
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t4_set_reg_field(sc, A_SGE_HOST_PAGE_SIZE,
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V_HOSTPAGESIZEPF0(M_HOSTPAGESIZEPF0),
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V_HOSTPAGESIZEPF0(PAGE_SHIFT - 10));
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for (i = 0; i < FL_BUF_SIZES; i++) {
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t4_write_reg(sc, A_SGE_FL_BUFFER_SIZE0 + (4 * i),
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FL_BUF_SIZE(i));
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}
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t4_write_reg(sc, A_SGE_INGRESS_RX_THRESHOLD,
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V_THRESHOLD_0(s->counter_val[0]) |
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V_THRESHOLD_1(s->counter_val[1]) |
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V_THRESHOLD_2(s->counter_val[2]) |
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V_THRESHOLD_3(s->counter_val[3]));
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t4_write_reg(sc, A_SGE_TIMER_VALUE_0_AND_1,
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V_TIMERVALUE0(us_to_core_ticks(sc, s->timer_val[0])) |
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V_TIMERVALUE1(us_to_core_ticks(sc, s->timer_val[1])));
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t4_write_reg(sc, A_SGE_TIMER_VALUE_2_AND_3,
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V_TIMERVALUE2(us_to_core_ticks(sc, s->timer_val[2])) |
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V_TIMERVALUE3(us_to_core_ticks(sc, s->timer_val[3])));
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t4_write_reg(sc, A_SGE_TIMER_VALUE_4_AND_5,
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V_TIMERVALUE4(us_to_core_ticks(sc, s->timer_val[4])) |
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V_TIMERVALUE5(us_to_core_ticks(sc, s->timer_val[5])));
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}
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int
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t4_create_dma_tag(struct adapter *sc)
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{
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int rc;
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rc = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 1, 0,
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BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE,
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BUS_SPACE_UNRESTRICTED, BUS_SPACE_MAXSIZE, BUS_DMA_ALLOCNOW, NULL,
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NULL, &sc->dmat);
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if (rc != 0) {
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device_printf(sc->dev,
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"failed to create main DMA tag: %d\n", rc);
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}
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return (rc);
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}
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int
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t4_destroy_dma_tag(struct adapter *sc)
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{
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if (sc->dmat)
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bus_dma_tag_destroy(sc->dmat);
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return (0);
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}
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/*
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* Allocate and initialize the firmware event queue and the forwarded interrupt
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* queues, if any. The adapter owns all these queues as they are not associated
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* with any particular port.
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*
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* Returns errno on failure. Resources allocated up to that point may still be
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* allocated. Caller is responsible for cleanup in case this function fails.
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*/
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int
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t4_setup_adapter_iqs(struct adapter *sc)
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{
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int i, rc;
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struct sge_iq *iq, *fwq;
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iq_intr_handler_t *handler;
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char name[16];
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ADAPTER_LOCK_ASSERT_NOTOWNED(sc);
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fwq = &sc->sge.fwq;
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if (sc->flags & INTR_FWD) {
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iq = &sc->sge.fiq[0];
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/*
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* Forwarded interrupt queues - allocate 1 if there's only 1
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* vector available, one less than the number of vectors
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* otherwise (the first vector is reserved for the error
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* interrupt in that case).
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*/
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i = sc->intr_count > 1 ? 1 : 0;
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for (; i < sc->intr_count; i++, iq++) {
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snprintf(name, sizeof(name), "%s fiq%d",
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device_get_nameunit(sc->dev), i);
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init_iq(iq, sc, 0, 0, (sc->sge.nrxq + 1) * 2, 16, NULL,
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name);
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rc = alloc_iq(iq, i);
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if (rc != 0) {
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device_printf(sc->dev,
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"failed to create fwd intr queue %d: %d\n",
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i, rc);
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return (rc);
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}
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}
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handler = t4_intr_evt;
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i = 0; /* forward fwq's interrupt to the first fiq */
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} else {
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handler = NULL;
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i = 1; /* fwq should use vector 1 (0 is used by error) */
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}
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snprintf(name, sizeof(name), "%s fwq", device_get_nameunit(sc->dev));
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init_iq(fwq, sc, 0, 0, FW_IQ_QSIZE, FW_IQ_ESIZE, handler, name);
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rc = alloc_iq(fwq, i);
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if (rc != 0) {
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device_printf(sc->dev,
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"failed to create firmware event queue: %d\n", rc);
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}
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return (rc);
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}
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/*
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* Idempotent
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*/
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int
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t4_teardown_adapter_iqs(struct adapter *sc)
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{
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int i;
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struct sge_iq *iq;
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ADAPTER_LOCK_ASSERT_NOTOWNED(sc);
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iq = &sc->sge.fwq;
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free_iq(iq);
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if (sc->flags & INTR_FWD) {
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for (i = 0; i < NFIQ(sc); i++) {
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iq = &sc->sge.fiq[i];
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free_iq(iq);
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}
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}
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return (0);
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}
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int
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t4_setup_eth_queues(struct port_info *pi)
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{
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int rc = 0, i, intr_idx;
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struct sge_rxq *rxq;
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struct sge_txq *txq;
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char name[16];
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struct adapter *sc = pi->adapter;
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if (sysctl_ctx_init(&pi->ctx) == 0) {
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struct sysctl_oid *oid = device_get_sysctl_tree(pi->dev);
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struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
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pi->oid_rxq = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO,
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"rxq", CTLFLAG_RD, NULL, "rx queues");
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pi->oid_txq = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO,
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"txq", CTLFLAG_RD, NULL, "tx queues");
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}
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for_each_rxq(pi, i, rxq) {
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snprintf(name, sizeof(name), "%s rxq%d-iq",
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device_get_nameunit(pi->dev), i);
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init_iq(&rxq->iq, sc, pi->tmr_idx, pi->pktc_idx,
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pi->qsize_rxq, RX_IQ_ESIZE,
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sc->flags & INTR_FWD ? t4_intr_data: NULL, name);
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snprintf(name, sizeof(name), "%s rxq%d-fl",
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device_get_nameunit(pi->dev), i);
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init_fl(&rxq->fl, pi->qsize_rxq / 8, name);
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if (sc->flags & INTR_FWD)
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intr_idx = (pi->first_rxq + i) % NFIQ(sc);
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else
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intr_idx = pi->first_rxq + i + 2;
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rc = alloc_rxq(pi, rxq, intr_idx, i);
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if (rc != 0)
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goto done;
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intr_idx++;
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}
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for_each_txq(pi, i, txq) {
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snprintf(name, sizeof(name), "%s txq%d",
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device_get_nameunit(pi->dev), i);
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init_txq(txq, pi->qsize_txq, name);
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rc = alloc_txq(pi, txq, i);
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if (rc != 0)
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goto done;
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}
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done:
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if (rc)
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t4_teardown_eth_queues(pi);
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return (rc);
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}
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/*
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* Idempotent
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*/
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int
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t4_teardown_eth_queues(struct port_info *pi)
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{
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int i;
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struct sge_rxq *rxq;
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struct sge_txq *txq;
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/* Do this before freeing the queues */
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if (pi->oid_txq || pi->oid_rxq) {
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sysctl_ctx_free(&pi->ctx);
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pi->oid_txq = pi->oid_rxq = NULL;
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}
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for_each_txq(pi, i, txq) {
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free_txq(pi, txq);
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}
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for_each_rxq(pi, i, rxq) {
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free_rxq(pi, rxq);
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}
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return (0);
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}
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/* Deals with errors and forwarded interrupts */
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void
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t4_intr_all(void *arg)
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{
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struct adapter *sc = arg;
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t4_intr_err(arg);
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t4_intr_fwd(&sc->sge.fiq[0]);
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}
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|
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/* Deals with forwarded interrupts on the given ingress queue */
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void
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t4_intr_fwd(void *arg)
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{
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struct sge_iq *iq = arg, *q;
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struct adapter *sc = iq->adapter;
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struct rsp_ctrl *ctrl;
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int ndesc_pending = 0, ndesc_total = 0;
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int qid;
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IQ_LOCK(iq);
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while (is_new_response(iq, &ctrl)) {
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|
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rmb();
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|
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/* Only interrupt muxing expected on this queue */
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KASSERT(G_RSPD_TYPE(ctrl->u.type_gen) == X_RSPD_TYPE_INTR,
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("unexpected event on forwarded interrupt queue: %x",
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G_RSPD_TYPE(ctrl->u.type_gen)));
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|
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qid = ntohl(ctrl->pldbuflen_qid) - sc->sge.iq_start;
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q = sc->sge.iqmap[qid];
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q->handler(q);
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ndesc_total++;
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if (++ndesc_pending >= iq->qsize / 4) {
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t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS),
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V_CIDXINC(ndesc_pending) |
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V_INGRESSQID(iq->cntxt_id) |
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V_SEINTARM(
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V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
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ndesc_pending = 0;
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}
|
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|
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iq_next(iq);
|
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}
|
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IQ_UNLOCK(iq);
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|
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if (ndesc_total > 0) {
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t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS),
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V_CIDXINC(ndesc_pending) | V_INGRESSQID((u32)iq->cntxt_id) |
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V_SEINTARM(iq->intr_params));
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}
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}
|
|
|
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/* Deals with error interrupts */
|
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void
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t4_intr_err(void *arg)
|
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{
|
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struct adapter *sc = arg;
|
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|
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if (sc->intr_type == 1)
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t4_write_reg(sc, MYPF_REG(A_PCIE_PF_CLI), 0);
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|
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t4_slow_intr_handler(sc);
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}
|
|
|
|
/* Deals with the firmware event queue */
|
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void
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t4_intr_evt(void *arg)
|
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{
|
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struct sge_iq *iq = arg;
|
|
struct adapter *sc = iq->adapter;
|
|
struct rsp_ctrl *ctrl;
|
|
const struct rss_header *rss;
|
|
int ndesc_pending = 0, ndesc_total = 0;
|
|
|
|
KASSERT(iq == &sc->sge.fwq, ("%s: unexpected ingress queue", __func__));
|
|
|
|
IQ_LOCK(iq);
|
|
while (is_new_response(iq, &ctrl)) {
|
|
|
|
rmb();
|
|
|
|
rss = (const void *)iq->cdesc;
|
|
|
|
/* Should only get CPL on this queue */
|
|
KASSERT(G_RSPD_TYPE(ctrl->u.type_gen) == X_RSPD_TYPE_CPL,
|
|
("%s: unexpected type %d", __func__,
|
|
G_RSPD_TYPE(ctrl->u.type_gen)));
|
|
|
|
switch (rss->opcode) {
|
|
case CPL_FW4_MSG:
|
|
case CPL_FW6_MSG: {
|
|
const struct cpl_fw6_msg *cpl;
|
|
|
|
cpl = (const void *)(rss + 1);
|
|
if (cpl->type == FW6_TYPE_CMD_RPL)
|
|
t4_handle_fw_rpl(sc, cpl->data);
|
|
|
|
break;
|
|
}
|
|
case CPL_SGE_EGR_UPDATE: {
|
|
const struct cpl_sge_egr_update *cpl;
|
|
unsigned int qid;
|
|
struct sge *s = &sc->sge;
|
|
struct sge_txq *txq;
|
|
|
|
cpl = (const void *)(rss + 1);
|
|
qid = G_EGR_QID(ntohl(cpl->opcode_qid));
|
|
txq = (void *)s->eqmap[qid - s->eq_start];
|
|
txq->egr_update++;
|
|
|
|
/* XXX: wake up stalled tx */
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
device_printf(sc->dev,
|
|
"can't handle CPL opcode %d.", rss->opcode);
|
|
}
|
|
|
|
ndesc_total++;
|
|
if (++ndesc_pending >= iq->qsize / 4) {
|
|
t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS),
|
|
V_CIDXINC(ndesc_pending) |
|
|
V_INGRESSQID(iq->cntxt_id) |
|
|
V_SEINTARM(
|
|
V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
|
|
ndesc_pending = 0;
|
|
}
|
|
iq_next(iq);
|
|
}
|
|
IQ_UNLOCK(iq);
|
|
|
|
if (ndesc_total > 0) {
|
|
t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS),
|
|
V_CIDXINC(ndesc_pending) | V_INGRESSQID(iq->cntxt_id) |
|
|
V_SEINTARM(iq->intr_params));
|
|
}
|
|
}
|
|
|
|
void
|
|
t4_intr_data(void *arg)
|
|
{
|
|
struct sge_rxq *rxq = arg;
|
|
struct sge_iq *iq = arg;
|
|
struct rsp_ctrl *ctrl;
|
|
struct sge_fl *fl = &rxq->fl;
|
|
struct port_info *pi = rxq->port;
|
|
struct ifnet *ifp = pi->ifp;
|
|
struct adapter *sc = pi->adapter;
|
|
const struct rss_header *rss;
|
|
const struct cpl_rx_pkt *cpl;
|
|
int ndescs = 0, rsp_type;
|
|
uint32_t len;
|
|
struct mbuf *m0, *m;
|
|
#ifdef INET
|
|
struct lro_ctrl *lro = &rxq->lro;
|
|
struct lro_entry *l;
|
|
#endif
|
|
|
|
IQ_LOCK(iq);
|
|
iq->intr_next = iq->intr_params;
|
|
while (is_new_response(iq, &ctrl)) {
|
|
|
|
rmb();
|
|
|
|
rss = (const void *)iq->cdesc;
|
|
cpl = (const void *)(rss + 1);
|
|
|
|
rsp_type = G_RSPD_TYPE(ctrl->u.type_gen);
|
|
|
|
if (__predict_false(rsp_type == X_RSPD_TYPE_CPL)) {
|
|
const struct cpl_sge_egr_update *p = (const void *)cpl;
|
|
unsigned int qid = G_EGR_QID(ntohl(p->opcode_qid));
|
|
|
|
KASSERT(cpl->opcode == CPL_SGE_EGR_UPDATE,
|
|
("unexpected opcode on data ingress queue: %x",
|
|
cpl->opcode));
|
|
|
|
/* XXX: noone's waiting to be woken up... */
|
|
wakeup(sc->sge.eqmap[qid - sc->sge.eq_start]);
|
|
|
|
ndescs++;
|
|
iq_next(iq);
|
|
|
|
continue;
|
|
}
|
|
|
|
KASSERT(G_RSPD_TYPE(ctrl->u.type_gen) == X_RSPD_TYPE_FLBUF,
|
|
("unexpected event on data ingress queue: %x",
|
|
G_RSPD_TYPE(ctrl->u.type_gen)));
|
|
|
|
len = be32toh(ctrl->pldbuflen_qid);
|
|
|
|
KASSERT(len & F_RSPD_NEWBUF,
|
|
("%s: T4 misconfigured to pack buffers.", __func__));
|
|
|
|
len = G_RSPD_LEN(len);
|
|
m0 = get_fl_sdesc_data(fl, len, M_PKTHDR);
|
|
if (m0 == NULL) {
|
|
iq->intr_next = V_QINTR_TIMER_IDX(SGE_NTIMERS - 1);
|
|
break;
|
|
}
|
|
|
|
len -= FL_PKTSHIFT;
|
|
m0->m_len -= FL_PKTSHIFT;
|
|
m0->m_data += FL_PKTSHIFT;
|
|
|
|
m0->m_pkthdr.len = len;
|
|
m0->m_pkthdr.rcvif = ifp;
|
|
m0->m_flags |= M_FLOWID;
|
|
m0->m_pkthdr.flowid = rss->hash_val;
|
|
|
|
if (cpl->csum_calc && !cpl->err_vec &&
|
|
ifp->if_capenable & IFCAP_RXCSUM) {
|
|
m0->m_pkthdr.csum_flags |= (CSUM_IP_CHECKED |
|
|
CSUM_IP_VALID | CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
|
|
if (cpl->ip_frag)
|
|
m0->m_pkthdr.csum_data = be16toh(cpl->csum);
|
|
else
|
|
m0->m_pkthdr.csum_data = 0xffff;
|
|
rxq->rxcsum++;
|
|
}
|
|
|
|
if (cpl->vlan_ex) {
|
|
m0->m_pkthdr.ether_vtag = be16toh(cpl->vlan);
|
|
m0->m_flags |= M_VLANTAG;
|
|
rxq->vlan_extraction++;
|
|
}
|
|
|
|
len -= m0->m_len;
|
|
m = m0;
|
|
while (len) {
|
|
m->m_next = get_fl_sdesc_data(fl, len, 0);
|
|
if (m->m_next == NULL)
|
|
CXGBE_UNIMPLEMENTED("mbuf recovery");
|
|
|
|
m = m->m_next;
|
|
len -= m->m_len;
|
|
}
|
|
#ifdef INET
|
|
if (cpl->l2info & htobe32(F_RXF_LRO) &&
|
|
rxq->flags & RXQ_LRO_ENABLED &&
|
|
tcp_lro_rx(lro, m0, 0) == 0) {
|
|
/* queued for LRO */
|
|
} else
|
|
#endif
|
|
(*ifp->if_input)(ifp, m0);
|
|
|
|
FL_LOCK(fl);
|
|
if (fl->needed >= 32) {
|
|
refill_fl(fl, 64);
|
|
if (fl->pending >= 32)
|
|
ring_fl_db(sc, fl);
|
|
}
|
|
FL_UNLOCK(fl);
|
|
|
|
ndescs++;
|
|
iq_next(iq);
|
|
|
|
if (ndescs > 32) {
|
|
t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS),
|
|
V_CIDXINC(ndescs) |
|
|
V_INGRESSQID((u32)iq->cntxt_id) |
|
|
V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
|
|
ndescs = 0;
|
|
}
|
|
}
|
|
|
|
#ifdef INET
|
|
while (!SLIST_EMPTY(&lro->lro_active)) {
|
|
l = SLIST_FIRST(&lro->lro_active);
|
|
SLIST_REMOVE_HEAD(&lro->lro_active, next);
|
|
tcp_lro_flush(lro, l);
|
|
}
|
|
#endif
|
|
|
|
t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_CIDXINC(ndescs) |
|
|
V_INGRESSQID((u32)iq->cntxt_id) | V_SEINTARM(iq->intr_next));
|
|
|
|
IQ_UNLOCK(iq);
|
|
|
|
FL_LOCK(fl);
|
|
if (fl->needed) {
|
|
refill_fl(fl, -1);
|
|
if (fl->pending >= 8)
|
|
ring_fl_db(sc, fl);
|
|
}
|
|
FL_UNLOCK(fl);
|
|
}
|
|
|
|
/* Per-packet header in a coalesced tx WR, before the SGL starts (in flits) */
|
|
#define TXPKTS_PKT_HDR ((\
|
|
sizeof(struct ulp_txpkt) + \
|
|
sizeof(struct ulptx_idata) + \
|
|
sizeof(struct cpl_tx_pkt_core) \
|
|
) / 8)
|
|
|
|
/* Header of a coalesced tx WR, before SGL of first packet (in flits) */
|
|
#define TXPKTS_WR_HDR (\
|
|
sizeof(struct fw_eth_tx_pkts_wr) / 8 + \
|
|
TXPKTS_PKT_HDR)
|
|
|
|
/* Header of a tx WR, before SGL of first packet (in flits) */
|
|
#define TXPKT_WR_HDR ((\
|
|
sizeof(struct fw_eth_tx_pkt_wr) + \
|
|
sizeof(struct cpl_tx_pkt_core) \
|
|
) / 8 )
|
|
|
|
/* Header of a tx LSO WR, before SGL of first packet (in flits) */
|
|
#define TXPKT_LSO_WR_HDR ((\
|
|
sizeof(struct fw_eth_tx_pkt_wr) + \
|
|
sizeof(struct cpl_tx_pkt_lso) + \
|
|
sizeof(struct cpl_tx_pkt_core) \
|
|
) / 8 )
|
|
|
|
int
|
|
t4_eth_tx(struct ifnet *ifp, struct sge_txq *txq, struct mbuf *m)
|
|
{
|
|
struct port_info *pi = (void *)ifp->if_softc;
|
|
struct adapter *sc = pi->adapter;
|
|
struct sge_eq *eq = &txq->eq;
|
|
struct buf_ring *br = eq->br;
|
|
struct mbuf *next;
|
|
int rc, coalescing;
|
|
struct txpkts txpkts;
|
|
struct sgl sgl;
|
|
|
|
TXQ_LOCK_ASSERT_OWNED(txq);
|
|
KASSERT(m, ("%s: called with nothing to do.", __func__));
|
|
|
|
txpkts.npkt = 0;/* indicates there's nothing in txpkts */
|
|
coalescing = 0;
|
|
|
|
prefetch(&eq->sdesc[eq->pidx]);
|
|
prefetch(&eq->desc[eq->pidx]);
|
|
prefetch(&eq->maps[eq->map_pidx]);
|
|
|
|
if (eq->avail < 8)
|
|
reclaim_tx_descs(eq, 1, 8);
|
|
|
|
for (; m; m = next ? next : drbr_dequeue(ifp, br)) {
|
|
|
|
if (eq->avail < 8)
|
|
break;
|
|
|
|
next = m->m_nextpkt;
|
|
m->m_nextpkt = NULL;
|
|
|
|
if (next || buf_ring_peek(br))
|
|
coalescing = 1;
|
|
|
|
rc = get_pkt_sgl(txq, &m, &sgl, coalescing);
|
|
if (rc != 0) {
|
|
if (rc == ENOMEM) {
|
|
|
|
/* Short of resources, suspend tx */
|
|
|
|
m->m_nextpkt = next;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Unrecoverable error for this packet, throw it away
|
|
* and move on to the next. get_pkt_sgl may already
|
|
* have freed m (it will be NULL in that case and the
|
|
* m_freem here is still safe).
|
|
*/
|
|
|
|
m_freem(m);
|
|
continue;
|
|
}
|
|
|
|
if (coalescing &&
|
|
add_to_txpkts(pi, txq, &txpkts, m, &sgl) == 0) {
|
|
|
|
/* Successfully absorbed into txpkts */
|
|
|
|
write_ulp_cpl_sgl(pi, txq, &txpkts, m, &sgl);
|
|
goto doorbell;
|
|
}
|
|
|
|
/*
|
|
* We weren't coalescing to begin with, or current frame could
|
|
* not be coalesced (add_to_txpkts flushes txpkts if a frame
|
|
* given to it can't be coalesced). Either way there should be
|
|
* nothing in txpkts.
|
|
*/
|
|
KASSERT(txpkts.npkt == 0,
|
|
("%s: txpkts not empty: %d", __func__, txpkts.npkt));
|
|
|
|
/* We're sending out individual packets now */
|
|
coalescing = 0;
|
|
|
|
if (eq->avail < 8)
|
|
reclaim_tx_descs(eq, 1, 8);
|
|
rc = write_txpkt_wr(pi, txq, m, &sgl);
|
|
if (rc != 0) {
|
|
|
|
/* Short of hardware descriptors, suspend tx */
|
|
|
|
/*
|
|
* This is an unlikely but expensive failure. We've
|
|
* done all the hard work (DMA mappings etc.) and now we
|
|
* can't send out the packet. What's worse, we have to
|
|
* spend even more time freeing up everything in sgl.
|
|
*/
|
|
txq->no_desc++;
|
|
free_pkt_sgl(txq, &sgl);
|
|
|
|
m->m_nextpkt = next;
|
|
break;
|
|
}
|
|
|
|
ETHER_BPF_MTAP(ifp, m);
|
|
if (sgl.nsegs == 0)
|
|
m_freem(m);
|
|
|
|
doorbell:
|
|
/* Fewer and fewer doorbells as the queue fills up */
|
|
if (eq->pending >= (1 << (fls(eq->qsize - eq->avail) / 2)))
|
|
ring_tx_db(sc, eq);
|
|
reclaim_tx_descs(eq, 16, 32);
|
|
}
|
|
|
|
if (txpkts.npkt > 0)
|
|
write_txpkts_wr(txq, &txpkts);
|
|
|
|
/*
|
|
* m not NULL means there was an error but we haven't thrown it away.
|
|
* This can happen when we're short of tx descriptors (no_desc) or maybe
|
|
* even DMA maps (no_dmamap). Either way, a credit flush and reclaim
|
|
* will get things going again.
|
|
*
|
|
* If eq->avail is already 0 we know a credit flush was requested in the
|
|
* WR that reduced it to 0 so we don't need another flush (we don't have
|
|
* any descriptor for a flush WR anyway, duh).
|
|
*/
|
|
if (m && eq->avail > 0)
|
|
write_eqflush_wr(eq);
|
|
txq->m = m;
|
|
|
|
if (eq->pending)
|
|
ring_tx_db(sc, eq);
|
|
|
|
reclaim_tx_descs(eq, 16, eq->qsize);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
t4_update_fl_bufsize(struct ifnet *ifp)
|
|
{
|
|
struct port_info *pi = ifp->if_softc;
|
|
struct sge_rxq *rxq;
|
|
struct sge_fl *fl;
|
|
int i;
|
|
|
|
for_each_rxq(pi, i, rxq) {
|
|
fl = &rxq->fl;
|
|
|
|
FL_LOCK(fl);
|
|
set_fl_tag_idx(fl, ifp->if_mtu);
|
|
FL_UNLOCK(fl);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* A non-NULL handler indicates this iq will not receive direct interrupts, the
|
|
* handler will be invoked by a forwarded interrupt queue.
|
|
*/
|
|
static inline void
|
|
init_iq(struct sge_iq *iq, struct adapter *sc, int tmr_idx, int pktc_idx,
|
|
int qsize, int esize, iq_intr_handler_t *handler, char *name)
|
|
{
|
|
KASSERT(tmr_idx >= 0 && tmr_idx < SGE_NTIMERS,
|
|
("%s: bad tmr_idx %d", __func__, tmr_idx));
|
|
KASSERT(pktc_idx < SGE_NCOUNTERS, /* -ve is ok, means don't use */
|
|
("%s: bad pktc_idx %d", __func__, pktc_idx));
|
|
|
|
iq->flags = 0;
|
|
iq->adapter = sc;
|
|
iq->intr_params = V_QINTR_TIMER_IDX(tmr_idx) |
|
|
V_QINTR_CNT_EN(pktc_idx >= 0);
|
|
iq->intr_pktc_idx = pktc_idx;
|
|
iq->qsize = roundup(qsize, 16); /* See FW_IQ_CMD/iqsize */
|
|
iq->esize = max(esize, 16); /* See FW_IQ_CMD/iqesize */
|
|
iq->handler = handler;
|
|
strlcpy(iq->lockname, name, sizeof(iq->lockname));
|
|
}
|
|
|
|
static inline void
|
|
init_fl(struct sge_fl *fl, int qsize, char *name)
|
|
{
|
|
fl->qsize = qsize;
|
|
strlcpy(fl->lockname, name, sizeof(fl->lockname));
|
|
}
|
|
|
|
static inline void
|
|
init_txq(struct sge_txq *txq, int qsize, char *name)
|
|
{
|
|
txq->eq.qsize = qsize;
|
|
strlcpy(txq->eq.lockname, name, sizeof(txq->eq.lockname));
|
|
}
|
|
|
|
static int
|
|
alloc_ring(struct adapter *sc, size_t len, bus_dma_tag_t *tag,
|
|
bus_dmamap_t *map, bus_addr_t *pa, void **va)
|
|
{
|
|
int rc;
|
|
|
|
rc = bus_dma_tag_create(sc->dmat, 512, 0, BUS_SPACE_MAXADDR,
|
|
BUS_SPACE_MAXADDR, NULL, NULL, len, 1, len, 0, NULL, NULL, tag);
|
|
if (rc != 0) {
|
|
device_printf(sc->dev, "cannot allocate DMA tag: %d\n", rc);
|
|
goto done;
|
|
}
|
|
|
|
rc = bus_dmamem_alloc(*tag, va,
|
|
BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO, map);
|
|
if (rc != 0) {
|
|
device_printf(sc->dev, "cannot allocate DMA memory: %d\n", rc);
|
|
goto done;
|
|
}
|
|
|
|
rc = bus_dmamap_load(*tag, *map, *va, len, oneseg_dma_callback, pa, 0);
|
|
if (rc != 0) {
|
|
device_printf(sc->dev, "cannot load DMA map: %d\n", rc);
|
|
goto done;
|
|
}
|
|
done:
|
|
if (rc)
|
|
free_ring(sc, *tag, *map, *pa, *va);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
static int
|
|
free_ring(struct adapter *sc, bus_dma_tag_t tag, bus_dmamap_t map,
|
|
bus_addr_t pa, void *va)
|
|
{
|
|
if (pa)
|
|
bus_dmamap_unload(tag, map);
|
|
if (va)
|
|
bus_dmamem_free(tag, va, map);
|
|
if (tag)
|
|
bus_dma_tag_destroy(tag);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Allocates the ring for an ingress queue and an optional freelist. If the
|
|
* freelist is specified it will be allocated and then associated with the
|
|
* ingress queue.
|
|
*
|
|
* Returns errno on failure. Resources allocated up to that point may still be
|
|
* allocated. Caller is responsible for cleanup in case this function fails.
|
|
*
|
|
* If the ingress queue will take interrupts directly (iq->handler == NULL) then
|
|
* the intr_idx specifies the vector, starting from 0. Otherwise it specifies
|
|
* the index of the queue to which its interrupts will be forwarded.
|
|
*/
|
|
static int
|
|
alloc_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl,
|
|
int intr_idx)
|
|
{
|
|
int rc, i, cntxt_id;
|
|
size_t len;
|
|
struct fw_iq_cmd c;
|
|
struct adapter *sc = iq->adapter;
|
|
__be32 v = 0;
|
|
|
|
/* The adapter queues are nominally allocated in port[0]'s name */
|
|
if (pi == NULL)
|
|
pi = sc->port[0];
|
|
|
|
mtx_init(&iq->iq_lock, iq->lockname, NULL, MTX_DEF);
|
|
|
|
len = iq->qsize * iq->esize;
|
|
rc = alloc_ring(sc, len, &iq->desc_tag, &iq->desc_map, &iq->ba,
|
|
(void **)&iq->desc);
|
|
if (rc != 0)
|
|
return (rc);
|
|
|
|
bzero(&c, sizeof(c));
|
|
c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST |
|
|
F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_IQ_CMD_PFN(sc->pf) |
|
|
V_FW_IQ_CMD_VFN(0));
|
|
|
|
c.alloc_to_len16 = htobe32(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART |
|
|
FW_LEN16(c));
|
|
|
|
/* Special handling for firmware event queue */
|
|
if (iq == &sc->sge.fwq)
|
|
v |= F_FW_IQ_CMD_IQASYNCH;
|
|
|
|
if (iq->handler) {
|
|
KASSERT(intr_idx < NFIQ(sc),
|
|
("%s: invalid indirect intr_idx %d", __func__, intr_idx));
|
|
v |= F_FW_IQ_CMD_IQANDST;
|
|
v |= V_FW_IQ_CMD_IQANDSTINDEX(sc->sge.fiq[intr_idx].abs_id);
|
|
} else {
|
|
KASSERT(intr_idx < sc->intr_count,
|
|
("%s: invalid direct intr_idx %d", __func__, intr_idx));
|
|
v |= V_FW_IQ_CMD_IQANDSTINDEX(intr_idx);
|
|
}
|
|
|
|
c.type_to_iqandstindex = htobe32(v |
|
|
V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) |
|
|
V_FW_IQ_CMD_VIID(pi->viid) |
|
|
V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT));
|
|
c.iqdroprss_to_iqesize = htobe16(V_FW_IQ_CMD_IQPCIECH(pi->tx_chan) |
|
|
F_FW_IQ_CMD_IQGTSMODE |
|
|
V_FW_IQ_CMD_IQINTCNTTHRESH(iq->intr_pktc_idx) |
|
|
V_FW_IQ_CMD_IQESIZE(ilog2(iq->esize) - 4));
|
|
c.iqsize = htobe16(iq->qsize);
|
|
c.iqaddr = htobe64(iq->ba);
|
|
|
|
if (fl) {
|
|
mtx_init(&fl->fl_lock, fl->lockname, NULL, MTX_DEF);
|
|
|
|
for (i = 0; i < FL_BUF_SIZES; i++) {
|
|
|
|
/*
|
|
* A freelist buffer must be 16 byte aligned as the SGE
|
|
* uses the low 4 bits of the bus addr to figure out the
|
|
* buffer size.
|
|
*/
|
|
rc = bus_dma_tag_create(sc->dmat, 16, 0,
|
|
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
|
|
FL_BUF_SIZE(i), 1, FL_BUF_SIZE(i), BUS_DMA_ALLOCNOW,
|
|
NULL, NULL, &fl->tag[i]);
|
|
if (rc != 0) {
|
|
device_printf(sc->dev,
|
|
"failed to create fl DMA tag[%d]: %d\n",
|
|
i, rc);
|
|
return (rc);
|
|
}
|
|
}
|
|
len = fl->qsize * RX_FL_ESIZE;
|
|
rc = alloc_ring(sc, len, &fl->desc_tag, &fl->desc_map,
|
|
&fl->ba, (void **)&fl->desc);
|
|
if (rc)
|
|
return (rc);
|
|
|
|
/* Allocate space for one software descriptor per buffer. */
|
|
fl->cap = (fl->qsize - SPG_LEN / RX_FL_ESIZE) * 8;
|
|
FL_LOCK(fl);
|
|
set_fl_tag_idx(fl, pi->ifp->if_mtu);
|
|
rc = alloc_fl_sdesc(fl);
|
|
FL_UNLOCK(fl);
|
|
if (rc != 0) {
|
|
device_printf(sc->dev,
|
|
"failed to setup fl software descriptors: %d\n",
|
|
rc);
|
|
return (rc);
|
|
}
|
|
fl->needed = fl->cap - 1; /* one less to avoid cidx = pidx */
|
|
|
|
c.iqns_to_fl0congen =
|
|
htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE));
|
|
c.fl0dcaen_to_fl0cidxfthresh =
|
|
htobe16(V_FW_IQ_CMD_FL0FBMIN(X_FETCHBURSTMIN_64B) |
|
|
V_FW_IQ_CMD_FL0FBMAX(X_FETCHBURSTMAX_512B));
|
|
c.fl0size = htobe16(fl->qsize);
|
|
c.fl0addr = htobe64(fl->ba);
|
|
}
|
|
|
|
rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c);
|
|
if (rc != 0) {
|
|
device_printf(sc->dev,
|
|
"failed to create ingress queue: %d\n", rc);
|
|
return (rc);
|
|
}
|
|
|
|
iq->cdesc = iq->desc;
|
|
iq->cidx = 0;
|
|
iq->gen = 1;
|
|
iq->intr_next = iq->intr_params;
|
|
iq->cntxt_id = be16toh(c.iqid);
|
|
iq->abs_id = be16toh(c.physiqid);
|
|
iq->flags |= (IQ_ALLOCATED | IQ_STARTED);
|
|
|
|
cntxt_id = iq->cntxt_id - sc->sge.iq_start;
|
|
KASSERT(cntxt_id < sc->sge.niq,
|
|
("%s: iq->cntxt_id (%d) more than the max (%d)", __func__,
|
|
cntxt_id, sc->sge.niq - 1));
|
|
sc->sge.iqmap[cntxt_id] = iq;
|
|
|
|
if (fl) {
|
|
fl->cntxt_id = be16toh(c.fl0id);
|
|
fl->pidx = fl->cidx = 0;
|
|
|
|
cntxt_id = iq->cntxt_id - sc->sge.eq_start;
|
|
KASSERT(cntxt_id < sc->sge.neq,
|
|
("%s: fl->cntxt_id (%d) more than the max (%d)", __func__,
|
|
cntxt_id, sc->sge.neq - 1));
|
|
sc->sge.eqmap[cntxt_id] = (void *)fl;
|
|
|
|
FL_LOCK(fl);
|
|
refill_fl(fl, -1);
|
|
if (fl->pending >= 8)
|
|
ring_fl_db(sc, fl);
|
|
FL_UNLOCK(fl);
|
|
}
|
|
|
|
/* Enable IQ interrupts */
|
|
t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_SEINTARM(iq->intr_params) |
|
|
V_INGRESSQID(iq->cntxt_id));
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This can be called with the iq/fl in any state - fully allocated and
|
|
* functional, partially allocated, even all-zeroed out.
|
|
*/
|
|
static int
|
|
free_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl)
|
|
{
|
|
int i, rc;
|
|
struct adapter *sc = iq->adapter;
|
|
device_t dev;
|
|
|
|
if (sc == NULL)
|
|
return (0); /* nothing to do */
|
|
|
|
dev = pi ? pi->dev : sc->dev;
|
|
|
|
if (iq->flags & IQ_STARTED) {
|
|
rc = -t4_iq_start_stop(sc, sc->mbox, 0, sc->pf, 0,
|
|
iq->cntxt_id, fl ? fl->cntxt_id : 0xffff, 0xffff);
|
|
if (rc != 0) {
|
|
device_printf(dev,
|
|
"failed to stop queue %p: %d\n", iq, rc);
|
|
return (rc);
|
|
}
|
|
iq->flags &= ~IQ_STARTED;
|
|
}
|
|
|
|
if (iq->flags & IQ_ALLOCATED) {
|
|
|
|
rc = -t4_iq_free(sc, sc->mbox, sc->pf, 0,
|
|
FW_IQ_TYPE_FL_INT_CAP, iq->cntxt_id,
|
|
fl ? fl->cntxt_id : 0xffff, 0xffff);
|
|
if (rc != 0) {
|
|
device_printf(dev,
|
|
"failed to free queue %p: %d\n", iq, rc);
|
|
return (rc);
|
|
}
|
|
iq->flags &= ~IQ_ALLOCATED;
|
|
}
|
|
|
|
free_ring(sc, iq->desc_tag, iq->desc_map, iq->ba, iq->desc);
|
|
|
|
if (mtx_initialized(&iq->iq_lock))
|
|
mtx_destroy(&iq->iq_lock);
|
|
|
|
bzero(iq, sizeof(*iq));
|
|
|
|
if (fl) {
|
|
free_ring(sc, fl->desc_tag, fl->desc_map, fl->ba,
|
|
fl->desc);
|
|
|
|
if (fl->sdesc) {
|
|
FL_LOCK(fl);
|
|
free_fl_sdesc(fl);
|
|
FL_UNLOCK(fl);
|
|
}
|
|
|
|
if (mtx_initialized(&fl->fl_lock))
|
|
mtx_destroy(&fl->fl_lock);
|
|
|
|
for (i = 0; i < FL_BUF_SIZES; i++) {
|
|
if (fl->tag[i])
|
|
bus_dma_tag_destroy(fl->tag[i]);
|
|
}
|
|
|
|
bzero(fl, sizeof(*fl));
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
alloc_iq(struct sge_iq *iq, int intr_idx)
|
|
{
|
|
return alloc_iq_fl(NULL, iq, NULL, intr_idx);
|
|
}
|
|
|
|
static int
|
|
free_iq(struct sge_iq *iq)
|
|
{
|
|
return free_iq_fl(NULL, iq, NULL);
|
|
}
|
|
|
|
static int
|
|
alloc_rxq(struct port_info *pi, struct sge_rxq *rxq, int intr_idx, int idx)
|
|
{
|
|
int rc;
|
|
struct sysctl_oid *oid;
|
|
struct sysctl_oid_list *children;
|
|
char name[16];
|
|
|
|
rc = alloc_iq_fl(pi, &rxq->iq, &rxq->fl, intr_idx);
|
|
if (rc != 0)
|
|
return (rc);
|
|
|
|
#ifdef INET
|
|
rc = tcp_lro_init(&rxq->lro);
|
|
if (rc != 0)
|
|
return (rc);
|
|
rxq->lro.ifp = pi->ifp; /* also indicates LRO init'ed */
|
|
|
|
if (pi->ifp->if_capenable & IFCAP_LRO)
|
|
rxq->flags |= RXQ_LRO_ENABLED;
|
|
#endif
|
|
rxq->port = pi;
|
|
|
|
children = SYSCTL_CHILDREN(pi->oid_rxq);
|
|
|
|
snprintf(name, sizeof(name), "%d", idx);
|
|
oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD,
|
|
NULL, "rx queue");
|
|
children = SYSCTL_CHILDREN(oid);
|
|
|
|
SYSCTL_ADD_INT(&pi->ctx, children, OID_AUTO, "lro_queued", CTLFLAG_RD,
|
|
&rxq->lro.lro_queued, 0, NULL);
|
|
SYSCTL_ADD_INT(&pi->ctx, children, OID_AUTO, "lro_flushed", CTLFLAG_RD,
|
|
&rxq->lro.lro_flushed, 0, NULL);
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "rxcsum", CTLFLAG_RD,
|
|
&rxq->rxcsum, "# of times hardware assisted with checksum");
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "vlan_extraction",
|
|
CTLFLAG_RD, &rxq->vlan_extraction,
|
|
"# of times hardware extracted 802.1Q tag");
|
|
|
|
return (rc);
|
|
}
|
|
|
|
static int
|
|
free_rxq(struct port_info *pi, struct sge_rxq *rxq)
|
|
{
|
|
int rc;
|
|
|
|
#ifdef INET
|
|
if (rxq->lro.ifp) {
|
|
tcp_lro_free(&rxq->lro);
|
|
rxq->lro.ifp = NULL;
|
|
}
|
|
#endif
|
|
|
|
rc = free_iq_fl(pi, &rxq->iq, &rxq->fl);
|
|
if (rc == 0)
|
|
bzero(rxq, sizeof(*rxq));
|
|
|
|
return (rc);
|
|
}
|
|
|
|
static int
|
|
alloc_txq(struct port_info *pi, struct sge_txq *txq, int idx)
|
|
{
|
|
int rc, cntxt_id;
|
|
size_t len;
|
|
struct adapter *sc = pi->adapter;
|
|
struct fw_eq_eth_cmd c;
|
|
struct sge_eq *eq = &txq->eq;
|
|
char name[16];
|
|
struct sysctl_oid *oid;
|
|
struct sysctl_oid_list *children;
|
|
|
|
mtx_init(&eq->eq_lock, eq->lockname, NULL, MTX_DEF);
|
|
|
|
len = eq->qsize * TX_EQ_ESIZE;
|
|
rc = alloc_ring(sc, len, &eq->desc_tag, &eq->desc_map,
|
|
&eq->ba, (void **)&eq->desc);
|
|
if (rc)
|
|
return (rc);
|
|
|
|
eq->cap = eq->qsize - SPG_LEN / TX_EQ_ESIZE;
|
|
eq->spg = (void *)&eq->desc[eq->cap];
|
|
eq->avail = eq->cap - 1; /* one less to avoid cidx = pidx */
|
|
eq->sdesc = malloc(eq->cap * sizeof(struct tx_sdesc), M_CXGBE,
|
|
M_ZERO | M_WAITOK);
|
|
eq->br = buf_ring_alloc(eq->qsize, M_CXGBE, M_WAITOK, &eq->eq_lock);
|
|
|
|
rc = bus_dma_tag_create(sc->dmat, 1, 0, BUS_SPACE_MAXADDR,
|
|
BUS_SPACE_MAXADDR, NULL, NULL, 64 * 1024, TX_SGL_SEGS,
|
|
BUS_SPACE_MAXSIZE, BUS_DMA_ALLOCNOW, NULL, NULL, &eq->tx_tag);
|
|
if (rc != 0) {
|
|
device_printf(sc->dev,
|
|
"failed to create tx DMA tag: %d\n", rc);
|
|
return (rc);
|
|
}
|
|
|
|
rc = alloc_eq_maps(eq);
|
|
if (rc != 0) {
|
|
device_printf(sc->dev, "failed to setup tx DMA maps: %d\n", rc);
|
|
return (rc);
|
|
}
|
|
|
|
bzero(&c, sizeof(c));
|
|
|
|
c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST |
|
|
F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_ETH_CMD_PFN(sc->pf) |
|
|
V_FW_EQ_ETH_CMD_VFN(0));
|
|
c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC |
|
|
F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c));
|
|
c.viid_pkd = htobe32(V_FW_EQ_ETH_CMD_VIID(pi->viid));
|
|
c.fetchszm_to_iqid =
|
|
htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) |
|
|
V_FW_EQ_ETH_CMD_PCIECHN(pi->tx_chan) |
|
|
V_FW_EQ_ETH_CMD_IQID(sc->sge.rxq[pi->first_rxq].iq.cntxt_id));
|
|
c.dcaen_to_eqsize = htobe32(V_FW_EQ_ETH_CMD_FBMIN(X_FETCHBURSTMIN_64B) |
|
|
V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) |
|
|
V_FW_EQ_ETH_CMD_CIDXFTHRESH(X_CIDXFLUSHTHRESH_32) |
|
|
V_FW_EQ_ETH_CMD_EQSIZE(eq->qsize));
|
|
c.eqaddr = htobe64(eq->ba);
|
|
|
|
rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c);
|
|
if (rc != 0) {
|
|
device_printf(pi->dev,
|
|
"failed to create egress queue: %d\n", rc);
|
|
return (rc);
|
|
}
|
|
|
|
eq->pidx = eq->cidx = 0;
|
|
eq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd));
|
|
eq->flags |= (EQ_ALLOCATED | EQ_STARTED);
|
|
|
|
cntxt_id = eq->cntxt_id - sc->sge.eq_start;
|
|
KASSERT(cntxt_id < sc->sge.neq,
|
|
("%s: eq->cntxt_id (%d) more than the max (%d)", __func__,
|
|
cntxt_id, sc->sge.neq - 1));
|
|
sc->sge.eqmap[cntxt_id] = eq;
|
|
|
|
children = SYSCTL_CHILDREN(pi->oid_txq);
|
|
|
|
snprintf(name, sizeof(name), "%d", idx);
|
|
oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD,
|
|
NULL, "tx queue");
|
|
children = SYSCTL_CHILDREN(oid);
|
|
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txcsum", CTLFLAG_RD,
|
|
&txq->txcsum, "# of times hardware assisted with checksum");
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "vlan_insertion",
|
|
CTLFLAG_RD, &txq->vlan_insertion,
|
|
"# of times hardware inserted 802.1Q tag");
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "tso_wrs", CTLFLAG_RD,
|
|
&txq->tso_wrs, "# of IPv4 TSO work requests");
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "imm_wrs", CTLFLAG_RD,
|
|
&txq->imm_wrs, "# of work requests with immediate data");
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "sgl_wrs", CTLFLAG_RD,
|
|
&txq->sgl_wrs, "# of work requests with direct SGL");
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkt_wrs", CTLFLAG_RD,
|
|
&txq->txpkt_wrs, "# of txpkt work requests (one pkt/WR)");
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts_wrs", CTLFLAG_RD,
|
|
&txq->txpkts_wrs, "# of txpkts work requests (multiple pkts/WR)");
|
|
SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts_pkts", CTLFLAG_RD,
|
|
&txq->txpkts_pkts, "# of frames tx'd using txpkts work requests");
|
|
|
|
SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "no_dmamap", CTLFLAG_RD,
|
|
&txq->no_dmamap, 0, "# of times txq ran out of DMA maps");
|
|
SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "no_desc", CTLFLAG_RD,
|
|
&txq->no_desc, 0, "# of times txq ran out of hardware descriptors");
|
|
SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "egr_update", CTLFLAG_RD,
|
|
&txq->egr_update, 0, "egress update notifications from the SGE");
|
|
|
|
return (rc);
|
|
}
|
|
|
|
static int
|
|
free_txq(struct port_info *pi, struct sge_txq *txq)
|
|
{
|
|
int rc;
|
|
struct adapter *sc = pi->adapter;
|
|
struct sge_eq *eq = &txq->eq;
|
|
|
|
if (eq->flags & (EQ_ALLOCATED | EQ_STARTED)) {
|
|
rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0, eq->cntxt_id);
|
|
if (rc != 0) {
|
|
device_printf(pi->dev,
|
|
"failed to free egress queue %p: %d\n", eq, rc);
|
|
return (rc);
|
|
}
|
|
eq->flags &= ~(EQ_ALLOCATED | EQ_STARTED);
|
|
}
|
|
|
|
free_ring(sc, eq->desc_tag, eq->desc_map, eq->ba, eq->desc);
|
|
|
|
free(eq->sdesc, M_CXGBE);
|
|
|
|
if (eq->maps)
|
|
free_eq_maps(eq);
|
|
|
|
buf_ring_free(eq->br, M_CXGBE);
|
|
|
|
if (eq->tx_tag)
|
|
bus_dma_tag_destroy(eq->tx_tag);
|
|
|
|
if (mtx_initialized(&eq->eq_lock))
|
|
mtx_destroy(&eq->eq_lock);
|
|
|
|
bzero(txq, sizeof(*txq));
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
oneseg_dma_callback(void *arg, bus_dma_segment_t *segs, int nseg, int error)
|
|
{
|
|
bus_addr_t *ba = arg;
|
|
|
|
KASSERT(nseg == 1,
|
|
("%s meant for single segment mappings only.", __func__));
|
|
|
|
*ba = error ? 0 : segs->ds_addr;
|
|
}
|
|
|
|
static inline bool
|
|
is_new_response(const struct sge_iq *iq, struct rsp_ctrl **ctrl)
|
|
{
|
|
*ctrl = (void *)((uintptr_t)iq->cdesc +
|
|
(iq->esize - sizeof(struct rsp_ctrl)));
|
|
|
|
return (((*ctrl)->u.type_gen >> S_RSPD_GEN) == iq->gen);
|
|
}
|
|
|
|
static inline void
|
|
iq_next(struct sge_iq *iq)
|
|
{
|
|
iq->cdesc = (void *) ((uintptr_t)iq->cdesc + iq->esize);
|
|
if (__predict_false(++iq->cidx == iq->qsize - 1)) {
|
|
iq->cidx = 0;
|
|
iq->gen ^= 1;
|
|
iq->cdesc = iq->desc;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
ring_fl_db(struct adapter *sc, struct sge_fl *fl)
|
|
{
|
|
int ndesc = fl->pending / 8;
|
|
|
|
/* Caller responsible for ensuring there's something useful to do */
|
|
KASSERT(ndesc > 0, ("%s called with no useful work to do.", __func__));
|
|
|
|
wmb();
|
|
|
|
t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), F_DBPRIO |
|
|
V_QID(fl->cntxt_id) | V_PIDX(ndesc));
|
|
|
|
fl->pending &= 7;
|
|
}
|
|
|
|
static void
|
|
refill_fl(struct sge_fl *fl, int nbufs)
|
|
{
|
|
__be64 *d = &fl->desc[fl->pidx];
|
|
struct fl_sdesc *sd = &fl->sdesc[fl->pidx];
|
|
bus_dma_tag_t tag;
|
|
bus_addr_t pa;
|
|
caddr_t cl;
|
|
int rc;
|
|
|
|
FL_LOCK_ASSERT_OWNED(fl);
|
|
|
|
if (nbufs < 0 || nbufs > fl->needed)
|
|
nbufs = fl->needed;
|
|
|
|
while (nbufs--) {
|
|
|
|
if (sd->cl != NULL) {
|
|
|
|
/*
|
|
* This happens when a frame small enough to fit
|
|
* entirely in an mbuf was received in cl last time.
|
|
* We'd held on to cl and can reuse it now. Note that
|
|
* we reuse a cluster of the old size if fl->tag_idx is
|
|
* no longer the same as sd->tag_idx.
|
|
*/
|
|
|
|
KASSERT(*d == sd->ba_tag,
|
|
("%s: recyling problem at pidx %d",
|
|
__func__, fl->pidx));
|
|
|
|
d++;
|
|
goto recycled;
|
|
}
|
|
|
|
|
|
if (fl->tag_idx != sd->tag_idx) {
|
|
bus_dmamap_t map;
|
|
bus_dma_tag_t newtag = fl->tag[fl->tag_idx];
|
|
bus_dma_tag_t oldtag = fl->tag[sd->tag_idx];
|
|
|
|
/*
|
|
* An MTU change can get us here. Discard the old map
|
|
* which was created with the old tag, but only if
|
|
* we're able to get a new one.
|
|
*/
|
|
rc = bus_dmamap_create(newtag, 0, &map);
|
|
if (rc == 0) {
|
|
bus_dmamap_destroy(oldtag, sd->map);
|
|
sd->map = map;
|
|
sd->tag_idx = fl->tag_idx;
|
|
}
|
|
}
|
|
|
|
tag = fl->tag[sd->tag_idx];
|
|
|
|
cl = m_cljget(NULL, M_NOWAIT, FL_BUF_SIZE(sd->tag_idx));
|
|
if (cl == NULL)
|
|
break;
|
|
|
|
rc = bus_dmamap_load(tag, sd->map, cl,
|
|
FL_BUF_SIZE(sd->tag_idx), oneseg_dma_callback,
|
|
&pa, 0);
|
|
if (rc != 0 || pa == 0) {
|
|
fl->dmamap_failed++;
|
|
uma_zfree(FL_BUF_ZONE(sd->tag_idx), cl);
|
|
break;
|
|
}
|
|
|
|
sd->cl = cl;
|
|
*d++ = htobe64(pa | sd->tag_idx);
|
|
|
|
#ifdef INVARIANTS
|
|
sd->ba_tag = htobe64(pa | sd->tag_idx);
|
|
#endif
|
|
|
|
recycled: fl->pending++;
|
|
fl->needed--;
|
|
sd++;
|
|
if (++fl->pidx == fl->cap) {
|
|
fl->pidx = 0;
|
|
sd = fl->sdesc;
|
|
d = fl->desc;
|
|
}
|
|
|
|
/* No harm if gethdr fails, we'll retry after rx */
|
|
if (sd->m == NULL)
|
|
sd->m = m_gethdr(M_NOWAIT, MT_NOINIT);
|
|
}
|
|
}
|
|
|
|
static int
|
|
alloc_fl_sdesc(struct sge_fl *fl)
|
|
{
|
|
struct fl_sdesc *sd;
|
|
bus_dma_tag_t tag;
|
|
int i, rc;
|
|
|
|
FL_LOCK_ASSERT_OWNED(fl);
|
|
|
|
fl->sdesc = malloc(fl->cap * sizeof(struct fl_sdesc), M_CXGBE,
|
|
M_ZERO | M_WAITOK);
|
|
|
|
tag = fl->tag[fl->tag_idx];
|
|
sd = fl->sdesc;
|
|
for (i = 0; i < fl->cap; i++, sd++) {
|
|
|
|
sd->tag_idx = fl->tag_idx;
|
|
rc = bus_dmamap_create(tag, 0, &sd->map);
|
|
if (rc != 0)
|
|
goto failed;
|
|
|
|
/* Doesn't matter if this succeeds or not */
|
|
sd->m = m_gethdr(M_NOWAIT, MT_NOINIT);
|
|
}
|
|
|
|
return (0);
|
|
failed:
|
|
while (--i >= 0) {
|
|
sd--;
|
|
bus_dmamap_destroy(tag, sd->map);
|
|
if (sd->m) {
|
|
m_init(sd->m, zone_mbuf, MLEN, M_NOWAIT, MT_DATA, 0);
|
|
m_free(sd->m);
|
|
sd->m = NULL;
|
|
}
|
|
}
|
|
KASSERT(sd == fl->sdesc, ("%s: EDOOFUS", __func__));
|
|
|
|
free(fl->sdesc, M_CXGBE);
|
|
fl->sdesc = NULL;
|
|
|
|
return (rc);
|
|
}
|
|
|
|
static void
|
|
free_fl_sdesc(struct sge_fl *fl)
|
|
{
|
|
struct fl_sdesc *sd;
|
|
int i;
|
|
|
|
FL_LOCK_ASSERT_OWNED(fl);
|
|
|
|
sd = fl->sdesc;
|
|
for (i = 0; i < fl->cap; i++, sd++) {
|
|
|
|
if (sd->m) {
|
|
m_init(sd->m, zone_mbuf, MLEN, M_NOWAIT, MT_DATA, 0);
|
|
m_free(sd->m);
|
|
sd->m = NULL;
|
|
}
|
|
|
|
if (sd->cl) {
|
|
bus_dmamap_unload(fl->tag[sd->tag_idx], sd->map);
|
|
uma_zfree(FL_BUF_ZONE(sd->tag_idx), sd->cl);
|
|
sd->cl = NULL;
|
|
}
|
|
|
|
bus_dmamap_destroy(fl->tag[sd->tag_idx], sd->map);
|
|
}
|
|
|
|
free(fl->sdesc, M_CXGBE);
|
|
fl->sdesc = NULL;
|
|
}
|
|
|
|
static int
|
|
alloc_eq_maps(struct sge_eq *eq)
|
|
{
|
|
struct tx_map *txm;
|
|
int i, rc, count;
|
|
|
|
/*
|
|
* We can stuff ~10 frames in an 8-descriptor txpkts WR (8 is the SGE
|
|
* limit for any WR). txq->no_dmamap events shouldn't occur if maps is
|
|
* sized for the worst case.
|
|
*/
|
|
count = eq->qsize * 10 / 8;
|
|
eq->map_total = eq->map_avail = count;
|
|
eq->map_cidx = eq->map_pidx = 0;
|
|
|
|
eq->maps = malloc(count * sizeof(struct tx_map), M_CXGBE,
|
|
M_ZERO | M_WAITOK);
|
|
|
|
txm = eq->maps;
|
|
for (i = 0; i < count; i++, txm++) {
|
|
rc = bus_dmamap_create(eq->tx_tag, 0, &txm->map);
|
|
if (rc != 0)
|
|
goto failed;
|
|
}
|
|
|
|
return (0);
|
|
failed:
|
|
while (--i >= 0) {
|
|
txm--;
|
|
bus_dmamap_destroy(eq->tx_tag, txm->map);
|
|
}
|
|
KASSERT(txm == eq->maps, ("%s: EDOOFUS", __func__));
|
|
|
|
free(eq->maps, M_CXGBE);
|
|
eq->maps = NULL;
|
|
|
|
return (rc);
|
|
}
|
|
|
|
static void
|
|
free_eq_maps(struct sge_eq *eq)
|
|
{
|
|
struct tx_map *txm;
|
|
int i;
|
|
|
|
txm = eq->maps;
|
|
for (i = 0; i < eq->map_total; i++, txm++) {
|
|
|
|
if (txm->m) {
|
|
bus_dmamap_unload(eq->tx_tag, txm->map);
|
|
m_freem(txm->m);
|
|
txm->m = NULL;
|
|
}
|
|
|
|
bus_dmamap_destroy(eq->tx_tag, txm->map);
|
|
}
|
|
|
|
free(eq->maps, M_CXGBE);
|
|
eq->maps = NULL;
|
|
}
|
|
|
|
/*
|
|
* We'll do immediate data tx for non-TSO, but only when not coalescing. We're
|
|
* willing to use upto 2 hardware descriptors which means a maximum of 96 bytes
|
|
* of immediate data.
|
|
*/
|
|
#define IMM_LEN ( \
|
|
2 * TX_EQ_ESIZE \
|
|
- sizeof(struct fw_eth_tx_pkt_wr) \
|
|
- sizeof(struct cpl_tx_pkt_core))
|
|
|
|
/*
|
|
* Returns non-zero on failure, no need to cleanup anything in that case.
|
|
*
|
|
* Note 1: We always try to defrag the mbuf if required and return EFBIG only
|
|
* if the resulting chain still won't fit in a tx descriptor.
|
|
*
|
|
* Note 2: We'll pullup the mbuf chain if TSO is requested and the first mbuf
|
|
* does not have the TCP header in it.
|
|
*/
|
|
static int
|
|
get_pkt_sgl(struct sge_txq *txq, struct mbuf **fp, struct sgl *sgl,
|
|
int sgl_only)
|
|
{
|
|
struct mbuf *m = *fp;
|
|
struct sge_eq *eq = &txq->eq;
|
|
struct tx_map *txm;
|
|
int rc, defragged = 0, n;
|
|
|
|
TXQ_LOCK_ASSERT_OWNED(txq);
|
|
|
|
if (m->m_pkthdr.tso_segsz)
|
|
sgl_only = 1; /* Do not allow immediate data with LSO */
|
|
|
|
start: sgl->nsegs = 0;
|
|
|
|
if (m->m_pkthdr.len <= IMM_LEN && !sgl_only)
|
|
return (0); /* nsegs = 0 tells caller to use imm. tx */
|
|
|
|
if (eq->map_avail == 0) {
|
|
txq->no_dmamap++;
|
|
return (ENOMEM);
|
|
}
|
|
txm = &eq->maps[eq->map_pidx];
|
|
|
|
if (m->m_pkthdr.tso_segsz && m->m_len < 50) {
|
|
*fp = m_pullup(m, 50);
|
|
m = *fp;
|
|
if (m == NULL)
|
|
return (ENOBUFS);
|
|
}
|
|
|
|
rc = bus_dmamap_load_mbuf_sg(eq->tx_tag, txm->map, m, sgl->seg,
|
|
&sgl->nsegs, BUS_DMA_NOWAIT);
|
|
if (rc == EFBIG && defragged == 0) {
|
|
m = m_defrag(m, M_DONTWAIT);
|
|
if (m == NULL)
|
|
return (EFBIG);
|
|
|
|
defragged = 1;
|
|
*fp = m;
|
|
goto start;
|
|
}
|
|
if (rc != 0)
|
|
return (rc);
|
|
|
|
txm->m = m;
|
|
eq->map_avail--;
|
|
if (++eq->map_pidx == eq->map_total)
|
|
eq->map_pidx = 0;
|
|
|
|
KASSERT(sgl->nsegs > 0 && sgl->nsegs <= TX_SGL_SEGS,
|
|
("%s: bad DMA mapping (%d segments)", __func__, sgl->nsegs));
|
|
|
|
/*
|
|
* Store the # of flits required to hold this frame's SGL in nflits. An
|
|
* SGL has a (ULPTX header + len0, addr0) tuple optionally followed by
|
|
* multiple (len0 + len1, addr0, addr1) tuples. If addr1 is not used
|
|
* then len1 must be set to 0.
|
|
*/
|
|
n = sgl->nsegs - 1;
|
|
sgl->nflits = (3 * n) / 2 + (n & 1) + 2;
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Releases all the txq resources used up in the specified sgl.
|
|
*/
|
|
static int
|
|
free_pkt_sgl(struct sge_txq *txq, struct sgl *sgl)
|
|
{
|
|
struct sge_eq *eq = &txq->eq;
|
|
struct tx_map *txm;
|
|
|
|
TXQ_LOCK_ASSERT_OWNED(txq);
|
|
|
|
if (sgl->nsegs == 0)
|
|
return (0); /* didn't use any map */
|
|
|
|
/* 1 pkt uses exactly 1 map, back it out */
|
|
|
|
eq->map_avail++;
|
|
if (eq->map_pidx > 0)
|
|
eq->map_pidx--;
|
|
else
|
|
eq->map_pidx = eq->map_total - 1;
|
|
|
|
txm = &eq->maps[eq->map_pidx];
|
|
bus_dmamap_unload(eq->tx_tag, txm->map);
|
|
txm->m = NULL;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
write_txpkt_wr(struct port_info *pi, struct sge_txq *txq, struct mbuf *m,
|
|
struct sgl *sgl)
|
|
{
|
|
struct sge_eq *eq = &txq->eq;
|
|
struct fw_eth_tx_pkt_wr *wr;
|
|
struct cpl_tx_pkt_core *cpl;
|
|
uint32_t ctrl; /* used in many unrelated places */
|
|
uint64_t ctrl1;
|
|
int nflits, ndesc;
|
|
struct tx_sdesc *txsd;
|
|
caddr_t dst;
|
|
|
|
TXQ_LOCK_ASSERT_OWNED(txq);
|
|
|
|
/*
|
|
* Do we have enough flits to send this frame out?
|
|
*/
|
|
ctrl = sizeof(struct cpl_tx_pkt_core);
|
|
if (m->m_pkthdr.tso_segsz) {
|
|
nflits = TXPKT_LSO_WR_HDR;
|
|
ctrl += sizeof(struct cpl_tx_pkt_lso);
|
|
} else
|
|
nflits = TXPKT_WR_HDR;
|
|
if (sgl->nsegs > 0)
|
|
nflits += sgl->nflits;
|
|
else {
|
|
nflits += howmany(m->m_pkthdr.len, 8);
|
|
ctrl += m->m_pkthdr.len;
|
|
}
|
|
ndesc = howmany(nflits, 8);
|
|
if (ndesc > eq->avail)
|
|
return (ENOMEM);
|
|
|
|
/* Firmware work request header */
|
|
wr = (void *)&eq->desc[eq->pidx];
|
|
wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKT_WR) |
|
|
V_FW_WR_IMMDLEN(ctrl));
|
|
ctrl = V_FW_WR_LEN16(howmany(nflits, 2));
|
|
if (eq->avail == ndesc)
|
|
ctrl |= F_FW_WR_EQUEQ | F_FW_WR_EQUIQ;
|
|
wr->equiq_to_len16 = htobe32(ctrl);
|
|
wr->r3 = 0;
|
|
|
|
if (m->m_pkthdr.tso_segsz) {
|
|
struct cpl_tx_pkt_lso *lso = (void *)(wr + 1);
|
|
struct ether_header *eh;
|
|
struct ip *ip;
|
|
struct tcphdr *tcp;
|
|
|
|
ctrl = V_LSO_OPCODE(CPL_TX_PKT_LSO) | F_LSO_FIRST_SLICE |
|
|
F_LSO_LAST_SLICE;
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
|
|
ctrl |= V_LSO_ETHHDR_LEN(1);
|
|
ip = (void *)((struct ether_vlan_header *)eh + 1);
|
|
} else
|
|
ip = (void *)(eh + 1);
|
|
|
|
tcp = (void *)((uintptr_t)ip + ip->ip_hl * 4);
|
|
ctrl |= V_LSO_IPHDR_LEN(ip->ip_hl) |
|
|
V_LSO_TCPHDR_LEN(tcp->th_off);
|
|
|
|
lso->lso_ctrl = htobe32(ctrl);
|
|
lso->ipid_ofst = htobe16(0);
|
|
lso->mss = htobe16(m->m_pkthdr.tso_segsz);
|
|
lso->seqno_offset = htobe32(0);
|
|
lso->len = htobe32(m->m_pkthdr.len);
|
|
|
|
cpl = (void *)(lso + 1);
|
|
|
|
txq->tso_wrs++;
|
|
} else
|
|
cpl = (void *)(wr + 1);
|
|
|
|
/* Checksum offload */
|
|
ctrl1 = 0;
|
|
if (!(m->m_pkthdr.csum_flags & CSUM_IP))
|
|
ctrl1 |= F_TXPKT_IPCSUM_DIS;
|
|
if (!(m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP)))
|
|
ctrl1 |= F_TXPKT_L4CSUM_DIS;
|
|
if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP))
|
|
txq->txcsum++; /* some hardware assistance provided */
|
|
|
|
/* VLAN tag insertion */
|
|
if (m->m_flags & M_VLANTAG) {
|
|
ctrl1 |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(m->m_pkthdr.ether_vtag);
|
|
txq->vlan_insertion++;
|
|
}
|
|
|
|
/* CPL header */
|
|
cpl->ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT) |
|
|
V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(pi->adapter->pf));
|
|
cpl->pack = 0;
|
|
cpl->len = htobe16(m->m_pkthdr.len);
|
|
cpl->ctrl1 = htobe64(ctrl1);
|
|
|
|
/* Software descriptor */
|
|
txsd = &eq->sdesc[eq->pidx];
|
|
txsd->desc_used = ndesc;
|
|
|
|
eq->pending += ndesc;
|
|
eq->avail -= ndesc;
|
|
eq->pidx += ndesc;
|
|
if (eq->pidx >= eq->cap)
|
|
eq->pidx -= eq->cap;
|
|
|
|
/* SGL */
|
|
dst = (void *)(cpl + 1);
|
|
if (sgl->nsegs > 0) {
|
|
txsd->map_used = 1;
|
|
txq->sgl_wrs++;
|
|
write_sgl_to_txd(eq, sgl, &dst);
|
|
} else {
|
|
txsd->map_used = 0;
|
|
txq->imm_wrs++;
|
|
for (; m; m = m->m_next) {
|
|
copy_to_txd(eq, mtod(m, caddr_t), &dst, m->m_len);
|
|
}
|
|
}
|
|
|
|
txq->txpkt_wrs++;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Returns 0 to indicate that m has been accepted into a coalesced tx work
|
|
* request. It has either been folded into txpkts or txpkts was flushed and m
|
|
* has started a new coalesced work request (as the first frame in a fresh
|
|
* txpkts).
|
|
*
|
|
* Returns non-zero to indicate a failure - caller is responsible for
|
|
* transmitting m, if there was anything in txpkts it has been flushed.
|
|
*/
|
|
static int
|
|
add_to_txpkts(struct port_info *pi, struct sge_txq *txq, struct txpkts *txpkts,
|
|
struct mbuf *m, struct sgl *sgl)
|
|
{
|
|
struct sge_eq *eq = &txq->eq;
|
|
int can_coalesce;
|
|
struct tx_sdesc *txsd;
|
|
int flits;
|
|
|
|
TXQ_LOCK_ASSERT_OWNED(txq);
|
|
|
|
if (txpkts->npkt > 0) {
|
|
flits = TXPKTS_PKT_HDR + sgl->nflits;
|
|
can_coalesce = m->m_pkthdr.tso_segsz == 0 &&
|
|
txpkts->nflits + flits <= TX_WR_FLITS &&
|
|
txpkts->nflits + flits <= eq->avail * 8 &&
|
|
txpkts->plen + m->m_pkthdr.len < 65536;
|
|
|
|
if (can_coalesce) {
|
|
txpkts->npkt++;
|
|
txpkts->nflits += flits;
|
|
txpkts->plen += m->m_pkthdr.len;
|
|
|
|
txsd = &eq->sdesc[eq->pidx];
|
|
txsd->map_used++;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Couldn't coalesce m into txpkts. The first order of business
|
|
* is to send txpkts on its way. Then we'll revisit m.
|
|
*/
|
|
write_txpkts_wr(txq, txpkts);
|
|
}
|
|
|
|
/*
|
|
* Check if we can start a new coalesced tx work request with m as
|
|
* the first packet in it.
|
|
*/
|
|
|
|
KASSERT(txpkts->npkt == 0, ("%s: txpkts not empty", __func__));
|
|
|
|
flits = TXPKTS_WR_HDR + sgl->nflits;
|
|
can_coalesce = m->m_pkthdr.tso_segsz == 0 &&
|
|
flits <= eq->avail * 8 && flits <= TX_WR_FLITS;
|
|
|
|
if (can_coalesce == 0)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Start a fresh coalesced tx WR with m as the first frame in it.
|
|
*/
|
|
txpkts->npkt = 1;
|
|
txpkts->nflits = flits;
|
|
txpkts->flitp = &eq->desc[eq->pidx].flit[2];
|
|
txpkts->plen = m->m_pkthdr.len;
|
|
|
|
txsd = &eq->sdesc[eq->pidx];
|
|
txsd->map_used = 1;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Note that write_txpkts_wr can never run out of hardware descriptors (but
|
|
* write_txpkt_wr can). add_to_txpkts ensures that a frame is accepted for
|
|
* coalescing only if sufficient hardware descriptors are available.
|
|
*/
|
|
static void
|
|
write_txpkts_wr(struct sge_txq *txq, struct txpkts *txpkts)
|
|
{
|
|
struct sge_eq *eq = &txq->eq;
|
|
struct fw_eth_tx_pkts_wr *wr;
|
|
struct tx_sdesc *txsd;
|
|
uint32_t ctrl;
|
|
int ndesc;
|
|
|
|
TXQ_LOCK_ASSERT_OWNED(txq);
|
|
|
|
ndesc = howmany(txpkts->nflits, 8);
|
|
|
|
wr = (void *)&eq->desc[eq->pidx];
|
|
wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR) |
|
|
V_FW_WR_IMMDLEN(0)); /* immdlen does not matter in this WR */
|
|
ctrl = V_FW_WR_LEN16(howmany(txpkts->nflits, 2));
|
|
if (eq->avail == ndesc)
|
|
ctrl |= F_FW_WR_EQUEQ | F_FW_WR_EQUIQ;
|
|
wr->equiq_to_len16 = htobe32(ctrl);
|
|
wr->plen = htobe16(txpkts->plen);
|
|
wr->npkt = txpkts->npkt;
|
|
wr->r3 = wr->r4 = 0;
|
|
|
|
/* Everything else already written */
|
|
|
|
txsd = &eq->sdesc[eq->pidx];
|
|
txsd->desc_used = ndesc;
|
|
|
|
KASSERT(eq->avail >= ndesc, ("%s: out ouf descriptors", __func__));
|
|
|
|
eq->pending += ndesc;
|
|
eq->avail -= ndesc;
|
|
eq->pidx += ndesc;
|
|
if (eq->pidx >= eq->cap)
|
|
eq->pidx -= eq->cap;
|
|
|
|
txq->txpkts_pkts += txpkts->npkt;
|
|
txq->txpkts_wrs++;
|
|
txpkts->npkt = 0; /* emptied */
|
|
}
|
|
|
|
static inline void
|
|
write_ulp_cpl_sgl(struct port_info *pi, struct sge_txq *txq,
|
|
struct txpkts *txpkts, struct mbuf *m, struct sgl *sgl)
|
|
{
|
|
struct ulp_txpkt *ulpmc;
|
|
struct ulptx_idata *ulpsc;
|
|
struct cpl_tx_pkt_core *cpl;
|
|
struct sge_eq *eq = &txq->eq;
|
|
uintptr_t flitp, start, end;
|
|
uint64_t ctrl;
|
|
caddr_t dst;
|
|
|
|
KASSERT(txpkts->npkt > 0, ("%s: txpkts is empty", __func__));
|
|
|
|
start = (uintptr_t)eq->desc;
|
|
end = (uintptr_t)eq->spg;
|
|
|
|
/* Checksum offload */
|
|
ctrl = 0;
|
|
if (!(m->m_pkthdr.csum_flags & CSUM_IP))
|
|
ctrl |= F_TXPKT_IPCSUM_DIS;
|
|
if (!(m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP)))
|
|
ctrl |= F_TXPKT_L4CSUM_DIS;
|
|
if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP))
|
|
txq->txcsum++; /* some hardware assistance provided */
|
|
|
|
/* VLAN tag insertion */
|
|
if (m->m_flags & M_VLANTAG) {
|
|
ctrl |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(m->m_pkthdr.ether_vtag);
|
|
txq->vlan_insertion++;
|
|
}
|
|
|
|
/*
|
|
* The previous packet's SGL must have ended at a 16 byte boundary (this
|
|
* is required by the firmware/hardware). It follows that flitp cannot
|
|
* wrap around between the ULPTX master command and ULPTX subcommand (8
|
|
* bytes each), and that it can not wrap around in the middle of the
|
|
* cpl_tx_pkt_core either.
|
|
*/
|
|
flitp = (uintptr_t)txpkts->flitp;
|
|
KASSERT((flitp & 0xf) == 0,
|
|
("%s: last SGL did not end at 16 byte boundary: %p",
|
|
__func__, txpkts->flitp));
|
|
|
|
/* ULP master command */
|
|
ulpmc = (void *)flitp;
|
|
ulpmc->cmd_dest = htonl(V_ULPTX_CMD(ULP_TX_PKT) | V_ULP_TXPKT_DEST(0));
|
|
ulpmc->len = htonl(howmany(sizeof(*ulpmc) + sizeof(*ulpsc) +
|
|
sizeof(*cpl) + 8 * sgl->nflits, 16));
|
|
|
|
/* ULP subcommand */
|
|
ulpsc = (void *)(ulpmc + 1);
|
|
ulpsc->cmd_more = htobe32(V_ULPTX_CMD((u32)ULP_TX_SC_IMM) |
|
|
F_ULP_TX_SC_MORE);
|
|
ulpsc->len = htobe32(sizeof(struct cpl_tx_pkt_core));
|
|
|
|
flitp += sizeof(*ulpmc) + sizeof(*ulpsc);
|
|
if (flitp == end)
|
|
flitp = start;
|
|
|
|
/* CPL_TX_PKT */
|
|
cpl = (void *)flitp;
|
|
cpl->ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT) |
|
|
V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(pi->adapter->pf));
|
|
cpl->pack = 0;
|
|
cpl->len = htobe16(m->m_pkthdr.len);
|
|
cpl->ctrl1 = htobe64(ctrl);
|
|
|
|
flitp += sizeof(*cpl);
|
|
if (flitp == end)
|
|
flitp = start;
|
|
|
|
/* SGL for this frame */
|
|
dst = (caddr_t)flitp;
|
|
txpkts->nflits += write_sgl_to_txd(eq, sgl, &dst);
|
|
txpkts->flitp = (void *)dst;
|
|
|
|
KASSERT(((uintptr_t)dst & 0xf) == 0,
|
|
("%s: SGL ends at %p (not a 16 byte boundary)", __func__, dst));
|
|
}
|
|
|
|
/*
|
|
* If the SGL ends on an address that is not 16 byte aligned, this function will
|
|
* add a 0 filled flit at the end. It returns 1 in that case.
|
|
*/
|
|
static int
|
|
write_sgl_to_txd(struct sge_eq *eq, struct sgl *sgl, caddr_t *to)
|
|
{
|
|
__be64 *flitp, *end;
|
|
struct ulptx_sgl *usgl;
|
|
bus_dma_segment_t *seg;
|
|
int i, padded;
|
|
|
|
KASSERT(sgl->nsegs > 0 && sgl->nflits > 0,
|
|
("%s: bad SGL - nsegs=%d, nflits=%d",
|
|
__func__, sgl->nsegs, sgl->nflits));
|
|
|
|
KASSERT(((uintptr_t)(*to) & 0xf) == 0,
|
|
("%s: SGL must start at a 16 byte boundary: %p", __func__, *to));
|
|
|
|
flitp = (__be64 *)(*to);
|
|
end = flitp + sgl->nflits;
|
|
seg = &sgl->seg[0];
|
|
usgl = (void *)flitp;
|
|
|
|
/*
|
|
* We start at a 16 byte boundary somewhere inside the tx descriptor
|
|
* ring, so we're at least 16 bytes away from the status page. There is
|
|
* no chance of a wrap around in the middle of usgl (which is 16 bytes).
|
|
*/
|
|
|
|
usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) |
|
|
V_ULPTX_NSGE(sgl->nsegs));
|
|
usgl->len0 = htobe32(seg->ds_len);
|
|
usgl->addr0 = htobe64(seg->ds_addr);
|
|
seg++;
|
|
|
|
if ((uintptr_t)end <= (uintptr_t)eq->spg) {
|
|
|
|
/* Won't wrap around at all */
|
|
|
|
for (i = 0; i < sgl->nsegs - 1; i++, seg++) {
|
|
usgl->sge[i / 2].len[i & 1] = htobe32(seg->ds_len);
|
|
usgl->sge[i / 2].addr[i & 1] = htobe64(seg->ds_addr);
|
|
}
|
|
if (i & 1)
|
|
usgl->sge[i / 2].len[1] = htobe32(0);
|
|
} else {
|
|
|
|
/* Will wrap somewhere in the rest of the SGL */
|
|
|
|
/* 2 flits already written, write the rest flit by flit */
|
|
flitp = (void *)(usgl + 1);
|
|
for (i = 0; i < sgl->nflits - 2; i++) {
|
|
if ((uintptr_t)flitp == (uintptr_t)eq->spg)
|
|
flitp = (void *)eq->desc;
|
|
*flitp++ = get_flit(seg, sgl->nsegs - 1, i);
|
|
}
|
|
end = flitp;
|
|
}
|
|
|
|
if ((uintptr_t)end & 0xf) {
|
|
*(uint64_t *)end = 0;
|
|
end++;
|
|
padded = 1;
|
|
} else
|
|
padded = 0;
|
|
|
|
if ((uintptr_t)end == (uintptr_t)eq->spg)
|
|
*to = (void *)eq->desc;
|
|
else
|
|
*to = (void *)end;
|
|
|
|
return (padded);
|
|
}
|
|
|
|
static inline void
|
|
copy_to_txd(struct sge_eq *eq, caddr_t from, caddr_t *to, int len)
|
|
{
|
|
if ((uintptr_t)(*to) + len <= (uintptr_t)eq->spg) {
|
|
bcopy(from, *to, len);
|
|
(*to) += len;
|
|
} else {
|
|
int portion = (uintptr_t)eq->spg - (uintptr_t)(*to);
|
|
|
|
bcopy(from, *to, portion);
|
|
from += portion;
|
|
portion = len - portion; /* remaining */
|
|
bcopy(from, (void *)eq->desc, portion);
|
|
(*to) = (caddr_t)eq->desc + portion;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
ring_tx_db(struct adapter *sc, struct sge_eq *eq)
|
|
{
|
|
wmb();
|
|
t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL),
|
|
V_QID(eq->cntxt_id) | V_PIDX(eq->pending));
|
|
eq->pending = 0;
|
|
}
|
|
|
|
static int
|
|
reclaim_tx_descs(struct sge_eq *eq, int atleast, int howmany)
|
|
{
|
|
struct tx_sdesc *txsd;
|
|
struct tx_map *txm, *next_txm;
|
|
unsigned int cidx, can_reclaim, reclaimed, maps, next_map_cidx;
|
|
|
|
EQ_LOCK_ASSERT_OWNED(eq);
|
|
|
|
cidx = eq->spg->cidx; /* stable snapshot */
|
|
cidx = be16_to_cpu(cidx);
|
|
|
|
if (cidx >= eq->cidx)
|
|
can_reclaim = cidx - eq->cidx;
|
|
else
|
|
can_reclaim = cidx + eq->cap - eq->cidx;
|
|
|
|
if (can_reclaim < atleast)
|
|
return (0);
|
|
|
|
next_map_cidx = eq->map_cidx;
|
|
next_txm = txm = &eq->maps[next_map_cidx];
|
|
prefetch(txm);
|
|
|
|
maps = reclaimed = 0;
|
|
do {
|
|
int ndesc;
|
|
|
|
txsd = &eq->sdesc[eq->cidx];
|
|
ndesc = txsd->desc_used;
|
|
|
|
/* Firmware doesn't return "partial" credits. */
|
|
KASSERT(can_reclaim >= ndesc,
|
|
("%s: unexpected number of credits: %d, %d",
|
|
__func__, can_reclaim, ndesc));
|
|
|
|
maps += txsd->map_used;
|
|
reclaimed += ndesc;
|
|
|
|
eq->cidx += ndesc;
|
|
if (eq->cidx >= eq->cap)
|
|
eq->cidx -= eq->cap;
|
|
|
|
can_reclaim -= ndesc;
|
|
|
|
} while (can_reclaim && reclaimed < howmany);
|
|
|
|
eq->avail += reclaimed;
|
|
KASSERT(eq->avail < eq->cap, /* avail tops out at (cap - 1) */
|
|
("%s: too many descriptors available", __func__));
|
|
|
|
eq->map_avail += maps;
|
|
KASSERT(eq->map_avail <= eq->map_total,
|
|
("%s: too many maps available", __func__));
|
|
|
|
prefetch(txm->m);
|
|
while (maps--) {
|
|
next_txm++;
|
|
if (++next_map_cidx == eq->map_total) {
|
|
next_map_cidx = 0;
|
|
next_txm = eq->maps;
|
|
}
|
|
prefetch(next_txm->m);
|
|
|
|
bus_dmamap_unload(eq->tx_tag, txm->map);
|
|
m_freem(txm->m);
|
|
txm->m = NULL;
|
|
|
|
txm = next_txm;
|
|
}
|
|
eq->map_cidx = next_map_cidx;
|
|
|
|
return (reclaimed);
|
|
}
|
|
|
|
static void
|
|
write_eqflush_wr(struct sge_eq *eq)
|
|
{
|
|
struct fw_eq_flush_wr *wr;
|
|
struct tx_sdesc *txsd;
|
|
|
|
EQ_LOCK_ASSERT_OWNED(eq);
|
|
KASSERT(eq->avail > 0, ("%s: no descriptors left.", __func__));
|
|
|
|
wr = (void *)&eq->desc[eq->pidx];
|
|
bzero(wr, sizeof(*wr));
|
|
wr->opcode = FW_EQ_FLUSH_WR;
|
|
wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(sizeof(*wr) / 16) |
|
|
F_FW_WR_EQUEQ | F_FW_WR_EQUIQ);
|
|
|
|
txsd = &eq->sdesc[eq->pidx];
|
|
txsd->desc_used = 1;
|
|
txsd->map_used = 0;
|
|
|
|
eq->pending++;
|
|
eq->avail--;
|
|
if (++eq->pidx == eq->cap)
|
|
eq->pidx = 0;
|
|
}
|
|
|
|
static __be64
|
|
get_flit(bus_dma_segment_t *sgl, int nsegs, int idx)
|
|
{
|
|
int i = (idx / 3) * 2;
|
|
|
|
switch (idx % 3) {
|
|
case 0: {
|
|
__be64 rc;
|
|
|
|
rc = htobe32(sgl[i].ds_len);
|
|
if (i + 1 < nsegs)
|
|
rc |= (uint64_t)htobe32(sgl[i + 1].ds_len) << 32;
|
|
|
|
return (rc);
|
|
}
|
|
case 1:
|
|
return htobe64(sgl[i].ds_addr);
|
|
case 2:
|
|
return htobe64(sgl[i + 1].ds_addr);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct mbuf *
|
|
get_fl_sdesc_data(struct sge_fl *fl, int len, int flags)
|
|
{
|
|
struct fl_sdesc *sd;
|
|
struct mbuf *m;
|
|
|
|
sd = &fl->sdesc[fl->cidx];
|
|
FL_LOCK(fl);
|
|
if (++fl->cidx == fl->cap)
|
|
fl->cidx = 0;
|
|
fl->needed++;
|
|
FL_UNLOCK(fl);
|
|
|
|
m = sd->m;
|
|
if (m == NULL) {
|
|
m = m_gethdr(M_NOWAIT, MT_NOINIT);
|
|
if (m == NULL)
|
|
return (NULL);
|
|
}
|
|
sd->m = NULL; /* consumed */
|
|
|
|
bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map, BUS_DMASYNC_POSTREAD);
|
|
m_init(m, zone_mbuf, MLEN, M_NOWAIT, MT_DATA, flags);
|
|
if ((flags && len < MINCLSIZE) || (!flags && len <= MLEN))
|
|
bcopy(sd->cl, mtod(m, caddr_t), len);
|
|
else {
|
|
bus_dmamap_unload(fl->tag[sd->tag_idx], sd->map);
|
|
m_cljset(m, sd->cl, FL_BUF_TYPE(sd->tag_idx));
|
|
sd->cl = NULL; /* consumed */
|
|
}
|
|
|
|
m->m_len = min(len, FL_BUF_SIZE(sd->tag_idx));
|
|
|
|
return (m);
|
|
}
|
|
|
|
static void
|
|
set_fl_tag_idx(struct sge_fl *fl, int mtu)
|
|
{
|
|
int i;
|
|
|
|
FL_LOCK_ASSERT_OWNED(fl);
|
|
|
|
for (i = 0; i < FL_BUF_SIZES - 1; i++) {
|
|
if (FL_BUF_SIZE(i) >= (mtu + FL_PKTSHIFT))
|
|
break;
|
|
}
|
|
|
|
fl->tag_idx = i;
|
|
}
|