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freebsd-skq/sys/dev/cxgbe/t4_sge.c
Navdeep Parhar 5f7a640879 Initialize various DDP parameters in the main cxgbe(4) driver: 
- Setup multiple DDP page sizes.  When the driver attempts DDP it will
  try to combine physically contiguous pages into regions of these sizes.

- Set the indicate size such that the payload carried in the indicate can
  be copied in the header mbuf (and the 16K rx buffer can be recycled).

- Set DDP threshold to the max payload that the chip will coalesce and
  deliver to the driver (this is ~16K by default, which is also why the
  offload rx queue is backed by 16K buffers).  If the chip is able to
  coalesce up to the max it's allowed to, it's a good sign that the peer
  is transmitting in bulk without any TCP PSH.

MFC after:	2 weeks
2012-08-16 22:33:56 +00:00

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/*-
* Copyright (c) 2011 Chelsio Communications, Inc.
* All rights reserved.
* Written by: Navdeep Parhar <np@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/types.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/kernel.h>
#include <sys/kdb.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/sysctl.h>
#include <sys/smp.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_vlan_var.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include "common/common.h"
#include "common/t4_regs.h"
#include "common/t4_regs_values.h"
#include "common/t4_msg.h"
struct fl_buf_info {
int size;
int type;
uma_zone_t zone;
};
/* Filled up by t4_sge_modload */
static struct fl_buf_info fl_buf_info[FL_BUF_SIZES];
#define FL_BUF_SIZE(x) (fl_buf_info[x].size)
#define FL_BUF_TYPE(x) (fl_buf_info[x].type)
#define FL_BUF_ZONE(x) (fl_buf_info[x].zone)
/*
* Ethernet frames are DMA'd at this byte offset into the freelist buffer.
* 0-7 are valid values.
*/
static int fl_pktshift = 2;
TUNABLE_INT("hw.cxgbe.fl_pktshift", &fl_pktshift);
/*
* Pad ethernet payload up to this boundary.
* -1: driver should figure out a good value.
* Any power of 2, from 32 to 4096 (both inclusive) is a valid value.
*/
static int fl_pad = -1;
TUNABLE_INT("hw.cxgbe.fl_pad", &fl_pad);
/*
* Status page length.
* -1: driver should figure out a good value.
* 64 or 128 are the only other valid values.
*/
static int spg_len = -1;
TUNABLE_INT("hw.cxgbe.spg_len", &spg_len);
/*
* Congestion drops.
* -1: no congestion feedback (not recommended).
* 0: backpressure the channel instead of dropping packets right away.
* 1: no backpressure, drop packets for the congested queue immediately.
*/
static int cong_drop = 0;
TUNABLE_INT("hw.cxgbe.cong_drop", &cong_drop);
/* Used to track coalesced tx work request */
struct txpkts {
uint64_t *flitp; /* ptr to flit where next pkt should start */
uint8_t npkt; /* # of packets in this work request */
uint8_t nflits; /* # of flits used by this work request */
uint16_t plen; /* total payload (sum of all packets) */
};
/* A packet's SGL. This + m_pkthdr has all info needed for tx */
struct sgl {
int nsegs; /* # of segments in the SGL, 0 means imm. tx */
int nflits; /* # of flits needed for the SGL */
bus_dma_segment_t seg[TX_SGL_SEGS];
};
static int service_iq(struct sge_iq *, int);
static struct mbuf *get_fl_payload(struct adapter *, struct sge_fl *, uint32_t,
int *);
static int t4_eth_rx(struct sge_iq *, const struct rss_header *, struct mbuf *);
static inline void init_iq(struct sge_iq *, struct adapter *, int, int, int,
int, char *);
static inline void init_fl(struct sge_fl *, int, int, char *);
static inline void init_eq(struct sge_eq *, int, int, uint8_t, uint16_t,
char *);
static int alloc_ring(struct adapter *, size_t, bus_dma_tag_t *, bus_dmamap_t *,
bus_addr_t *, void **);
static int free_ring(struct adapter *, bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
void *);
static int alloc_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *,
int, int);
static int free_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *);
static int alloc_fwq(struct adapter *);
static int free_fwq(struct adapter *);
static int alloc_mgmtq(struct adapter *);
static int free_mgmtq(struct adapter *);
static int alloc_rxq(struct port_info *, struct sge_rxq *, int, int,
struct sysctl_oid *);
static int free_rxq(struct port_info *, struct sge_rxq *);
#ifdef TCP_OFFLOAD
static int alloc_ofld_rxq(struct port_info *, struct sge_ofld_rxq *, int, int,
struct sysctl_oid *);
static int free_ofld_rxq(struct port_info *, struct sge_ofld_rxq *);
#endif
static int ctrl_eq_alloc(struct adapter *, struct sge_eq *);
static int eth_eq_alloc(struct adapter *, struct port_info *, struct sge_eq *);
#ifdef TCP_OFFLOAD
static int ofld_eq_alloc(struct adapter *, struct port_info *, struct sge_eq *);
#endif
static int alloc_eq(struct adapter *, struct port_info *, struct sge_eq *);
static int free_eq(struct adapter *, struct sge_eq *);
static int alloc_wrq(struct adapter *, struct port_info *, struct sge_wrq *,
struct sysctl_oid *);
static int free_wrq(struct adapter *, struct sge_wrq *);
static int alloc_txq(struct port_info *, struct sge_txq *, int,
struct sysctl_oid *);
static int free_txq(struct port_info *, struct sge_txq *);
static void oneseg_dma_callback(void *, bus_dma_segment_t *, int, int);
static inline bool is_new_response(const struct sge_iq *, struct rsp_ctrl **);
static inline void iq_next(struct sge_iq *);
static inline void ring_fl_db(struct adapter *, struct sge_fl *);
static int refill_fl(struct adapter *, struct sge_fl *, int);
static void refill_sfl(void *);
static int alloc_fl_sdesc(struct sge_fl *);
static void free_fl_sdesc(struct sge_fl *);
static void set_fl_tag_idx(struct sge_fl *, int);
static void add_fl_to_sfl(struct adapter *, struct sge_fl *);
static int get_pkt_sgl(struct sge_txq *, struct mbuf **, struct sgl *, int);
static int free_pkt_sgl(struct sge_txq *, struct sgl *);
static int write_txpkt_wr(struct port_info *, struct sge_txq *, struct mbuf *,
struct sgl *);
static int add_to_txpkts(struct port_info *, struct sge_txq *, struct txpkts *,
struct mbuf *, struct sgl *);
static void write_txpkts_wr(struct sge_txq *, struct txpkts *);
static inline void write_ulp_cpl_sgl(struct port_info *, struct sge_txq *,
struct txpkts *, struct mbuf *, struct sgl *);
static int write_sgl_to_txd(struct sge_eq *, struct sgl *, caddr_t *);
static inline void copy_to_txd(struct sge_eq *, caddr_t, caddr_t *, int);
static inline void ring_eq_db(struct adapter *, struct sge_eq *);
static inline int reclaimable(struct sge_eq *);
static int reclaim_tx_descs(struct sge_txq *, int, int);
static void write_eqflush_wr(struct sge_eq *);
static __be64 get_flit(bus_dma_segment_t *, int, int);
static int handle_sge_egr_update(struct sge_iq *, const struct rss_header *,
struct mbuf *);
static int handle_fw_msg(struct sge_iq *, const struct rss_header *,
struct mbuf *);
static int sysctl_uint16(SYSCTL_HANDLER_ARGS);
#if defined(__i386__) || defined(__amd64__)
extern u_int cpu_clflush_line_size;
#endif
/*
* Called on MOD_LOAD. Fills up fl_buf_info[] and validates/calculates the SGE
* tunables.
*/
void
t4_sge_modload(void)
{
int i;
int bufsize[FL_BUF_SIZES] = {
MCLBYTES,
#if MJUMPAGESIZE != MCLBYTES
MJUMPAGESIZE,
#endif
MJUM9BYTES,
MJUM16BYTES
};
for (i = 0; i < FL_BUF_SIZES; i++) {
FL_BUF_SIZE(i) = bufsize[i];
FL_BUF_TYPE(i) = m_gettype(bufsize[i]);
FL_BUF_ZONE(i) = m_getzone(bufsize[i]);
}
if (fl_pktshift < 0 || fl_pktshift > 7) {
printf("Invalid hw.cxgbe.fl_pktshift value (%d),"
" using 2 instead.\n", fl_pktshift);
fl_pktshift = 2;
}
if (fl_pad < 32 || fl_pad > 4096 || !powerof2(fl_pad)) {
int pad;
#if defined(__i386__) || defined(__amd64__)
pad = max(cpu_clflush_line_size, 32);
#else
pad = max(CACHE_LINE_SIZE, 32);
#endif
pad = min(pad, 4096);
if (fl_pad != -1) {
printf("Invalid hw.cxgbe.fl_pad value (%d),"
" using %d instead.\n", fl_pad, pad);
}
fl_pad = pad;
}
if (spg_len != 64 && spg_len != 128) {
int len;
#if defined(__i386__) || defined(__amd64__)
len = cpu_clflush_line_size > 64 ? 128 : 64;
#else
len = 64;
#endif
if (spg_len != -1) {
printf("Invalid hw.cxgbe.spg_len value (%d),"
" using %d instead.\n", spg_len, len);
}
spg_len = len;
}
if (cong_drop < -1 || cong_drop > 1) {
printf("Invalid hw.cxgbe.cong_drop value (%d),"
" using 0 instead.\n", cong_drop);
cong_drop = 0;
}
}
/**
* t4_sge_init - initialize SGE
* @sc: 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 them individually.
*/
int
t4_sge_init(struct adapter *sc)
{
struct sge *s = &sc->sge;
int i, rc = 0;
uint32_t ctrl_mask, ctrl_val, hpsize, v;
ctrl_mask = V_PKTSHIFT(M_PKTSHIFT) | F_RXPKTCPLMODE |
V_INGPADBOUNDARY(M_INGPADBOUNDARY) |
F_EGRSTATUSPAGESIZE;
ctrl_val = V_PKTSHIFT(fl_pktshift) | F_RXPKTCPLMODE |
V_INGPADBOUNDARY(ilog2(fl_pad) - 5) |
V_EGRSTATUSPAGESIZE(spg_len == 128);
hpsize = V_HOSTPAGESIZEPF0(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF1(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF2(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF3(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF4(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF5(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF6(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF7(PAGE_SHIFT - 10);
if (sc->flags & MASTER_PF) {
int intr_timer[SGE_NTIMERS] = {1, 5, 10, 50, 100, 200};
int intr_pktcount[SGE_NCOUNTERS] = {1, 8, 16, 32}; /* 63 max */
t4_set_reg_field(sc, A_SGE_CONTROL, ctrl_mask, ctrl_val);
t4_write_reg(sc, A_SGE_HOST_PAGE_SIZE, hpsize);
for (i = 0; i < FL_BUF_SIZES; i++) {
t4_write_reg(sc, A_SGE_FL_BUFFER_SIZE0 + (4 * i),
FL_BUF_SIZE(i));
}
t4_write_reg(sc, A_SGE_INGRESS_RX_THRESHOLD,
V_THRESHOLD_0(intr_pktcount[0]) |
V_THRESHOLD_1(intr_pktcount[1]) |
V_THRESHOLD_2(intr_pktcount[2]) |
V_THRESHOLD_3(intr_pktcount[3]));
t4_write_reg(sc, A_SGE_TIMER_VALUE_0_AND_1,
V_TIMERVALUE0(us_to_core_ticks(sc, intr_timer[0])) |
V_TIMERVALUE1(us_to_core_ticks(sc, intr_timer[1])));
t4_write_reg(sc, A_SGE_TIMER_VALUE_2_AND_3,
V_TIMERVALUE2(us_to_core_ticks(sc, intr_timer[2])) |
V_TIMERVALUE3(us_to_core_ticks(sc, intr_timer[3])));
t4_write_reg(sc, A_SGE_TIMER_VALUE_4_AND_5,
V_TIMERVALUE4(us_to_core_ticks(sc, intr_timer[4])) |
V_TIMERVALUE5(us_to_core_ticks(sc, intr_timer[5])));
}
v = t4_read_reg(sc, A_SGE_CONTROL);
if ((v & ctrl_mask) != ctrl_val) {
device_printf(sc->dev, "invalid SGE_CONTROL(0x%x)\n", v);
rc = EINVAL;
}
v = t4_read_reg(sc, A_SGE_HOST_PAGE_SIZE);
if (v != hpsize) {
device_printf(sc->dev, "invalid SGE_HOST_PAGE_SIZE(0x%x)\n", v);
rc = EINVAL;
}
for (i = 0; i < FL_BUF_SIZES; i++) {
v = t4_read_reg(sc, A_SGE_FL_BUFFER_SIZE0 + (4 * i));
if (v != FL_BUF_SIZE(i)) {
device_printf(sc->dev,
"invalid SGE_FL_BUFFER_SIZE[%d](0x%x)\n", i, v);
rc = EINVAL;
}
}
v = t4_read_reg(sc, A_SGE_CONM_CTRL);
s->fl_starve_threshold = G_EGRTHRESHOLD(v) * 2 + 1;
v = t4_read_reg(sc, A_SGE_INGRESS_RX_THRESHOLD);
sc->sge.counter_val[0] = G_THRESHOLD_0(v);
sc->sge.counter_val[1] = G_THRESHOLD_1(v);
sc->sge.counter_val[2] = G_THRESHOLD_2(v);
sc->sge.counter_val[3] = G_THRESHOLD_3(v);
v = t4_read_reg(sc, A_SGE_TIMER_VALUE_0_AND_1);
sc->sge.timer_val[0] = G_TIMERVALUE0(v) / core_ticks_per_usec(sc);
sc->sge.timer_val[1] = G_TIMERVALUE1(v) / core_ticks_per_usec(sc);
v = t4_read_reg(sc, A_SGE_TIMER_VALUE_2_AND_3);
sc->sge.timer_val[2] = G_TIMERVALUE2(v) / core_ticks_per_usec(sc);
sc->sge.timer_val[3] = G_TIMERVALUE3(v) / core_ticks_per_usec(sc);
v = t4_read_reg(sc, A_SGE_TIMER_VALUE_4_AND_5);
sc->sge.timer_val[4] = G_TIMERVALUE4(v) / core_ticks_per_usec(sc);
sc->sge.timer_val[5] = G_TIMERVALUE5(v) / core_ticks_per_usec(sc);
t4_register_cpl_handler(sc, CPL_FW4_MSG, handle_fw_msg);
t4_register_cpl_handler(sc, CPL_FW6_MSG, handle_fw_msg);
t4_register_cpl_handler(sc, CPL_SGE_EGR_UPDATE, handle_sge_egr_update);
t4_register_cpl_handler(sc, CPL_RX_PKT, t4_eth_rx);
t4_register_fw_msg_handler(sc, FW6_TYPE_CMD_RPL, t4_handle_fw_rpl);
return (rc);
}
int
t4_create_dma_tag(struct adapter *sc)
{
int rc;
rc = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 1, 0,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE,
BUS_SPACE_UNRESTRICTED, BUS_SPACE_MAXSIZE, BUS_DMA_ALLOCNOW, NULL,
NULL, &sc->dmat);
if (rc != 0) {
device_printf(sc->dev,
"failed to create main DMA tag: %d\n", rc);
}
return (rc);
}
int
t4_destroy_dma_tag(struct adapter *sc)
{
if (sc->dmat)
bus_dma_tag_destroy(sc->dmat);
return (0);
}
/*
* Allocate and initialize the firmware event queue and the management 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.
*/
int
t4_setup_adapter_queues(struct adapter *sc)
{
int rc;
ADAPTER_LOCK_ASSERT_NOTOWNED(sc);
sysctl_ctx_init(&sc->ctx);
sc->flags |= ADAP_SYSCTL_CTX;
/*
* Firmware event queue
*/
rc = alloc_fwq(sc);
if (rc != 0) {
device_printf(sc->dev,
"failed to create firmware event queue: %d\n", rc);
return (rc);
}
/*
* Management queue. This is just a control queue that uses the fwq as
* its associated iq.
*/
rc = alloc_mgmtq(sc);
if (rc != 0) {
device_printf(sc->dev,
"failed to create management queue: %d\n", rc);
return (rc);
}
return (rc);
}
/*
* Idempotent
*/
int
t4_teardown_adapter_queues(struct adapter *sc)
{
ADAPTER_LOCK_ASSERT_NOTOWNED(sc);
/* Do this before freeing the queue */
if (sc->flags & ADAP_SYSCTL_CTX) {
sysctl_ctx_free(&sc->ctx);
sc->flags &= ~ADAP_SYSCTL_CTX;
}
free_mgmtq(sc);
free_fwq(sc);
return (0);
}
static inline int
first_vector(struct port_info *pi)
{
struct adapter *sc = pi->adapter;
int rc = T4_EXTRA_INTR, i;
if (sc->intr_count == 1)
return (0);
for_each_port(sc, i) {
struct port_info *p = sc->port[i];
if (i == pi->port_id)
break;
#ifdef TCP_OFFLOAD
if (sc->flags & INTR_DIRECT)
rc += p->nrxq + p->nofldrxq;
else
rc += max(p->nrxq, p->nofldrxq);
#else
/*
* Not compiled with offload support and intr_count > 1. Only
* NIC queues exist and they'd better be taking direct
* interrupts.
*/
KASSERT(sc->flags & INTR_DIRECT,
("%s: intr_count %d, !INTR_DIRECT", __func__,
sc->intr_count));
rc += p->nrxq;
#endif
}
return (rc);
}
/*
* Given an arbitrary "index," come up with an iq that can be used by other
* queues (of this port) for interrupt forwarding, SGE egress updates, etc.
* The iq returned is guaranteed to be something that takes direct interrupts.
*/
static struct sge_iq *
port_intr_iq(struct port_info *pi, int idx)
{
struct adapter *sc = pi->adapter;
struct sge *s = &sc->sge;
struct sge_iq *iq = NULL;
if (sc->intr_count == 1)
return (&sc->sge.fwq);
#ifdef TCP_OFFLOAD
if (sc->flags & INTR_DIRECT) {
idx %= pi->nrxq + pi->nofldrxq;
if (idx >= pi->nrxq) {
idx -= pi->nrxq;
iq = &s->ofld_rxq[pi->first_ofld_rxq + idx].iq;
} else
iq = &s->rxq[pi->first_rxq + idx].iq;
} else {
idx %= max(pi->nrxq, pi->nofldrxq);
if (pi->nrxq >= pi->nofldrxq)
iq = &s->rxq[pi->first_rxq + idx].iq;
else
iq = &s->ofld_rxq[pi->first_ofld_rxq + idx].iq;
}
#else
/*
* Not compiled with offload support and intr_count > 1. Only NIC
* queues exist and they'd better be taking direct interrupts.
*/
KASSERT(sc->flags & INTR_DIRECT,
("%s: intr_count %d, !INTR_DIRECT", __func__, sc->intr_count));
idx %= pi->nrxq;
iq = &s->rxq[pi->first_rxq + idx].iq;
#endif
KASSERT(iq->flags & IQ_INTR, ("%s: EDOOFUS", __func__));
return (iq);
}
static inline int
mtu_to_bufsize(int mtu)
{
int bufsize;
/* large enough for a frame even when VLAN extraction is disabled */
bufsize = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN + mtu;
bufsize = roundup(bufsize + fl_pktshift, fl_pad);
return (bufsize);
}
int
t4_setup_port_queues(struct port_info *pi)
{
int rc = 0, i, j, intr_idx, iqid;
struct sge_rxq *rxq;
struct sge_txq *txq;
struct sge_wrq *ctrlq;
#ifdef TCP_OFFLOAD
struct sge_ofld_rxq *ofld_rxq;
struct sge_wrq *ofld_txq;
struct sysctl_oid *oid2 = NULL;
#endif
char name[16];
struct adapter *sc = pi->adapter;
struct sysctl_oid *oid = device_get_sysctl_tree(pi->dev);
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
int bufsize = mtu_to_bufsize(pi->ifp->if_mtu);
oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "rxq", CTLFLAG_RD,
NULL, "rx queues");
#ifdef TCP_OFFLOAD
if (is_offload(sc)) {
oid2 = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ofld_rxq",
CTLFLAG_RD, NULL,
"rx queues for offloaded TCP connections");
}
#endif
/* Interrupt vector to start from (when using multiple vectors) */
intr_idx = first_vector(pi);
/*
* First pass over all rx queues (NIC and TOE):
* a) initialize iq and fl
* b) allocate queue iff it will take direct interrupts.
*/
for_each_rxq(pi, i, rxq) {
snprintf(name, sizeof(name), "%s rxq%d-iq",
device_get_nameunit(pi->dev), i);
init_iq(&rxq->iq, sc, pi->tmr_idx, pi->pktc_idx, pi->qsize_rxq,
RX_IQ_ESIZE, name);
snprintf(name, sizeof(name), "%s rxq%d-fl",
device_get_nameunit(pi->dev), i);
init_fl(&rxq->fl, pi->qsize_rxq / 8, bufsize, name);
if (sc->flags & INTR_DIRECT
#ifdef TCP_OFFLOAD
|| (sc->intr_count > 1 && pi->nrxq >= pi->nofldrxq)
#endif
) {
rxq->iq.flags |= IQ_INTR;
rc = alloc_rxq(pi, rxq, intr_idx, i, oid);
if (rc != 0)
goto done;
intr_idx++;
}
}
#ifdef TCP_OFFLOAD
for_each_ofld_rxq(pi, i, ofld_rxq) {
snprintf(name, sizeof(name), "%s ofld_rxq%d-iq",
device_get_nameunit(pi->dev), i);
init_iq(&ofld_rxq->iq, sc, pi->tmr_idx, pi->pktc_idx,
pi->qsize_rxq, RX_IQ_ESIZE, name);
snprintf(name, sizeof(name), "%s ofld_rxq%d-fl",
device_get_nameunit(pi->dev), i);
init_fl(&ofld_rxq->fl, pi->qsize_rxq / 8, OFLD_BUF_SIZE, name);
if (sc->flags & INTR_DIRECT ||
(sc->intr_count > 1 && pi->nofldrxq > pi->nrxq)) {
ofld_rxq->iq.flags |= IQ_INTR;
rc = alloc_ofld_rxq(pi, ofld_rxq, intr_idx, i, oid2);
if (rc != 0)
goto done;
intr_idx++;
}
}
#endif
/*
* Second pass over all rx queues (NIC and TOE). The queues forwarding
* their interrupts are allocated now.
*/
j = 0;
for_each_rxq(pi, i, rxq) {
if (rxq->iq.flags & IQ_INTR)
continue;
intr_idx = port_intr_iq(pi, j)->abs_id;
rc = alloc_rxq(pi, rxq, intr_idx, i, oid);
if (rc != 0)
goto done;
j++;
}
#ifdef TCP_OFFLOAD
for_each_ofld_rxq(pi, i, ofld_rxq) {
if (ofld_rxq->iq.flags & IQ_INTR)
continue;
intr_idx = port_intr_iq(pi, j)->abs_id;
rc = alloc_ofld_rxq(pi, ofld_rxq, intr_idx, i, oid2);
if (rc != 0)
goto done;
j++;
}
#endif
/*
* Now the tx queues. Only one pass needed.
*/
oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "txq", CTLFLAG_RD,
NULL, "tx queues");
j = 0;
for_each_txq(pi, i, txq) {
uint16_t iqid;
iqid = port_intr_iq(pi, j)->cntxt_id;
snprintf(name, sizeof(name), "%s txq%d",
device_get_nameunit(pi->dev), i);
init_eq(&txq->eq, EQ_ETH, pi->qsize_txq, pi->tx_chan, iqid,
name);
rc = alloc_txq(pi, txq, i, oid);
if (rc != 0)
goto done;
j++;
}
#ifdef TCP_OFFLOAD
oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ofld_txq",
CTLFLAG_RD, NULL, "tx queues for offloaded TCP connections");
for_each_ofld_txq(pi, i, ofld_txq) {
uint16_t iqid;
iqid = port_intr_iq(pi, j)->cntxt_id;
snprintf(name, sizeof(name), "%s ofld_txq%d",
device_get_nameunit(pi->dev), i);
init_eq(&ofld_txq->eq, EQ_OFLD, pi->qsize_txq, pi->tx_chan,
iqid, name);
snprintf(name, sizeof(name), "%d", i);
oid2 = SYSCTL_ADD_NODE(&pi->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
name, CTLFLAG_RD, NULL, "offload tx queue");
rc = alloc_wrq(sc, pi, ofld_txq, oid2);
if (rc != 0)
goto done;
j++;
}
#endif
/*
* Finally, the control queue.
*/
oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ctrlq", CTLFLAG_RD,
NULL, "ctrl queue");
ctrlq = &sc->sge.ctrlq[pi->port_id];
iqid = port_intr_iq(pi, 0)->cntxt_id;
snprintf(name, sizeof(name), "%s ctrlq", device_get_nameunit(pi->dev));
init_eq(&ctrlq->eq, EQ_CTRL, CTRL_EQ_QSIZE, pi->tx_chan, iqid, name);
rc = alloc_wrq(sc, pi, ctrlq, oid);
done:
if (rc)
t4_teardown_port_queues(pi);
return (rc);
}
/*
* Idempotent
*/
int
t4_teardown_port_queues(struct port_info *pi)
{
int i;
struct adapter *sc = pi->adapter;
struct sge_rxq *rxq;
struct sge_txq *txq;
#ifdef TCP_OFFLOAD
struct sge_ofld_rxq *ofld_rxq;
struct sge_wrq *ofld_txq;
#endif
/* Do this before freeing the queues */
if (pi->flags & PORT_SYSCTL_CTX) {
sysctl_ctx_free(&pi->ctx);
pi->flags &= ~PORT_SYSCTL_CTX;
}
/*
* Take down all the tx queues first, as they reference the rx queues
* (for egress updates, etc.).
*/
free_wrq(sc, &sc->sge.ctrlq[pi->port_id]);
for_each_txq(pi, i, txq) {
free_txq(pi, txq);
}
#ifdef TCP_OFFLOAD
for_each_ofld_txq(pi, i, ofld_txq) {
free_wrq(sc, ofld_txq);
}
#endif
/*
* Then take down the rx queues that forward their interrupts, as they
* reference other rx queues.
*/
for_each_rxq(pi, i, rxq) {
if ((rxq->iq.flags & IQ_INTR) == 0)
free_rxq(pi, rxq);
}
#ifdef TCP_OFFLOAD
for_each_ofld_rxq(pi, i, ofld_rxq) {
if ((ofld_rxq->iq.flags & IQ_INTR) == 0)
free_ofld_rxq(pi, ofld_rxq);
}
#endif
/*
* Then take down the rx queues that take direct interrupts.
*/
for_each_rxq(pi, i, rxq) {
if (rxq->iq.flags & IQ_INTR)
free_rxq(pi, rxq);
}
#ifdef TCP_OFFLOAD
for_each_ofld_rxq(pi, i, ofld_rxq) {
if (ofld_rxq->iq.flags & IQ_INTR)
free_ofld_rxq(pi, ofld_rxq);
}
#endif
return (0);
}
/*
* Deals with errors and the firmware event queue. All data rx queues forward
* their interrupt to the firmware event queue.
*/
void
t4_intr_all(void *arg)
{
struct adapter *sc = arg;
struct sge_iq *fwq = &sc->sge.fwq;
t4_intr_err(arg);
if (atomic_cmpset_int(&fwq->state, IQS_IDLE, IQS_BUSY)) {
service_iq(fwq, 0);
atomic_cmpset_int(&fwq->state, IQS_BUSY, IQS_IDLE);
}
}
/* Deals with error interrupts */
void
t4_intr_err(void *arg)
{
struct adapter *sc = arg;
t4_write_reg(sc, MYPF_REG(A_PCIE_PF_CLI), 0);
t4_slow_intr_handler(sc);
}
void
t4_intr_evt(void *arg)
{
struct sge_iq *iq = arg;
if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) {
service_iq(iq, 0);
atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE);
}
}
void
t4_intr(void *arg)
{
struct sge_iq *iq = arg;
if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) {
service_iq(iq, 0);
atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE);
}
}
/*
* Deals with anything and everything on the given ingress queue.
*/
static int
service_iq(struct sge_iq *iq, int budget)
{
struct sge_iq *q;
struct sge_rxq *rxq = iq_to_rxq(iq); /* Use iff iq is part of rxq */
struct sge_fl *fl = &rxq->fl; /* Use iff IQ_HAS_FL */
struct adapter *sc = iq->adapter;
struct rsp_ctrl *ctrl;
const struct rss_header *rss;
int ndescs = 0, limit, fl_bufs_used = 0;
int rsp_type;
uint32_t lq;
struct mbuf *m0;
STAILQ_HEAD(, sge_iq) iql = STAILQ_HEAD_INITIALIZER(iql);
limit = budget ? budget : iq->qsize / 8;
KASSERT(iq->state == IQS_BUSY, ("%s: iq %p not BUSY", __func__, iq));
/*
* We always come back and check the descriptor ring for new indirect
* interrupts and other responses after running a single handler.
*/
for (;;) {
while (is_new_response(iq, &ctrl)) {
rmb();
m0 = NULL;
rsp_type = G_RSPD_TYPE(ctrl->u.type_gen);
lq = be32toh(ctrl->pldbuflen_qid);
rss = (const void *)iq->cdesc;
switch (rsp_type) {
case X_RSPD_TYPE_FLBUF:
KASSERT(iq->flags & IQ_HAS_FL,
("%s: data for an iq (%p) with no freelist",
__func__, iq));
m0 = get_fl_payload(sc, fl, lq, &fl_bufs_used);
#ifdef T4_PKT_TIMESTAMP
/*
* 60 bit timestamp for the payload is
* *(uint64_t *)m0->m_pktdat. Note that it is
* in the leading free-space in the mbuf. The
* kernel can clobber it during a pullup,
* m_copymdata, etc. You need to make sure that
* the mbuf reaches you unmolested if you care
* about the timestamp.
*/
*(uint64_t *)m0->m_pktdat =
be64toh(ctrl->u.last_flit) &
0xfffffffffffffff;
#endif
/* fall through */
case X_RSPD_TYPE_CPL:
KASSERT(rss->opcode < NUM_CPL_CMDS,
("%s: bad opcode %02x.", __func__,
rss->opcode));
sc->cpl_handler[rss->opcode](iq, rss, m0);
break;
case X_RSPD_TYPE_INTR:
/*
* Interrupts should be forwarded only to queues
* that are not forwarding their interrupts.
* This means service_iq can recurse but only 1
* level deep.
*/
KASSERT(budget == 0,
("%s: budget %u, rsp_type %u", __func__,
budget, rsp_type));
q = sc->sge.iqmap[lq - sc->sge.iq_start];
if (atomic_cmpset_int(&q->state, IQS_IDLE,
IQS_BUSY)) {
if (service_iq(q, q->qsize / 8) == 0) {
atomic_cmpset_int(&q->state,
IQS_BUSY, IQS_IDLE);
} else {
STAILQ_INSERT_TAIL(&iql, q,
link);
}
}
break;
default:
sc->an_handler(iq, ctrl);
break;
}
iq_next(iq);
if (++ndescs == limit) {
t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS),
V_CIDXINC(ndescs) |
V_INGRESSQID(iq->cntxt_id) |
V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
ndescs = 0;
if (fl_bufs_used > 0) {
FL_LOCK(fl);
fl->needed += fl_bufs_used;
refill_fl(sc, fl, fl->cap / 8);
FL_UNLOCK(fl);
fl_bufs_used = 0;
}
if (budget)
return (EINPROGRESS);
}
}
if (STAILQ_EMPTY(&iql))
break;
/*
* Process the head only, and send it to the back of the list if
* it's still not done.
*/
q = STAILQ_FIRST(&iql);
STAILQ_REMOVE_HEAD(&iql, link);
if (service_iq(q, q->qsize / 8) == 0)
atomic_cmpset_int(&q->state, IQS_BUSY, IQS_IDLE);
else
STAILQ_INSERT_TAIL(&iql, q, link);
}
#if defined(INET) || defined(INET6)
if (iq->flags & IQ_LRO_ENABLED) {
struct lro_ctrl *lro = &rxq->lro;
struct lro_entry *l;
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_params));
if (iq->flags & IQ_HAS_FL) {
int starved;
FL_LOCK(fl);
fl->needed += fl_bufs_used;
starved = refill_fl(sc, fl, fl->cap / 4);
FL_UNLOCK(fl);
if (__predict_false(starved != 0))
add_fl_to_sfl(sc, fl);
}
return (0);
}
static struct mbuf *
get_fl_payload(struct adapter *sc, struct sge_fl *fl, uint32_t len_newbuf,
int *fl_bufs_used)
{
struct mbuf *m0, *m;
struct fl_sdesc *sd = &fl->sdesc[fl->cidx];
unsigned int nbuf, len;
/*
* No assertion for the fl lock because we don't need it. This routine
* is called only from the rx interrupt handler and it only updates
* fl->cidx. (Contrast that with fl->pidx/fl->needed which could be
* updated in the rx interrupt handler or the starvation helper routine.
* That's why code that manipulates fl->pidx/fl->needed needs the fl
* lock but this routine does not).
*/
if (__predict_false((len_newbuf & F_RSPD_NEWBUF) == 0))
panic("%s: cannot handle packed frames", __func__);
len = G_RSPD_LEN(len_newbuf);
m0 = sd->m;
sd->m = NULL; /* consumed */
bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map, BUS_DMASYNC_POSTREAD);
m_init(m0, NULL, 0, M_NOWAIT, MT_DATA, M_PKTHDR);
#ifdef T4_PKT_TIMESTAMP
/* Leave room for a timestamp */
m0->m_data += 8;
#endif
if (len < RX_COPY_THRESHOLD) {
/* copy data to mbuf, buffer will be recycled */
bcopy(sd->cl, mtod(m0, caddr_t), len);
m0->m_len = len;
} else {
bus_dmamap_unload(fl->tag[sd->tag_idx], sd->map);
m_cljset(m0, sd->cl, FL_BUF_TYPE(sd->tag_idx));
sd->cl = NULL; /* consumed */
m0->m_len = min(len, FL_BUF_SIZE(sd->tag_idx));
}
m0->m_pkthdr.len = len;
sd++;
if (__predict_false(++fl->cidx == fl->cap)) {
sd = fl->sdesc;
fl->cidx = 0;
}
m = m0;
len -= m->m_len;
nbuf = 1; /* # of fl buffers used */
while (len > 0) {
m->m_next = sd->m;
sd->m = NULL; /* consumed */
m = m->m_next;
bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map,
BUS_DMASYNC_POSTREAD);
m_init(m, NULL, 0, M_NOWAIT, MT_DATA, 0);
if (len <= MLEN) {
bcopy(sd->cl, mtod(m, caddr_t), len);
m->m_len = 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));
}
sd++;
if (__predict_false(++fl->cidx == fl->cap)) {
sd = fl->sdesc;
fl->cidx = 0;
}
len -= m->m_len;
nbuf++;
}
(*fl_bufs_used) += nbuf;
return (m0);
}
static int
t4_eth_rx(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m0)
{
struct sge_rxq *rxq = iq_to_rxq(iq);
struct ifnet *ifp = rxq->ifp;
const struct cpl_rx_pkt *cpl = (const void *)(rss + 1);
#if defined(INET) || defined(INET6)
struct lro_ctrl *lro = &rxq->lro;
#endif
KASSERT(m0 != NULL, ("%s: no payload with opcode %02x", __func__,
rss->opcode));
m0->m_pkthdr.len -= fl_pktshift;
m0->m_len -= fl_pktshift;
m0->m_data += fl_pktshift;
m0->m_pkthdr.rcvif = ifp;
m0->m_flags |= M_FLOWID;
m0->m_pkthdr.flowid = rss->hash_val;
if (cpl->csum_calc && !cpl->err_vec) {
if (ifp->if_capenable & IFCAP_RXCSUM &&
cpl->l2info & htobe32(F_RXF_IP)) {
m0->m_pkthdr.csum_flags = (CSUM_IP_CHECKED |
CSUM_IP_VALID | CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
rxq->rxcsum++;
} else if (ifp->if_capenable & IFCAP_RXCSUM_IPV6 &&
cpl->l2info & htobe32(F_RXF_IP6)) {
m0->m_pkthdr.csum_flags = (CSUM_DATA_VALID_IPV6 |
CSUM_PSEUDO_HDR);
rxq->rxcsum++;
}
if (__predict_false(cpl->ip_frag))
m0->m_pkthdr.csum_data = be16toh(cpl->csum);
else
m0->m_pkthdr.csum_data = 0xffff;
}
if (cpl->vlan_ex) {
m0->m_pkthdr.ether_vtag = be16toh(cpl->vlan);
m0->m_flags |= M_VLANTAG;
rxq->vlan_extraction++;
}
#if defined(INET) || defined(INET6)
if (cpl->l2info & htobe32(F_RXF_LRO) &&
iq->flags & IQ_LRO_ENABLED &&
tcp_lro_rx(lro, m0, 0) == 0) {
/* queued for LRO */
} else
#endif
ifp->if_input(ifp, m0);
return (0);
}
/*
* Doesn't fail. Holds on to work requests it can't send right away.
*/
void
t4_wrq_tx_locked(struct adapter *sc, struct sge_wrq *wrq, struct wrqe *wr)
{
struct sge_eq *eq = &wrq->eq;
int can_reclaim;
caddr_t dst;
TXQ_LOCK_ASSERT_OWNED(wrq);
#ifdef TCP_OFFLOAD
KASSERT((eq->flags & EQ_TYPEMASK) == EQ_OFLD ||
(eq->flags & EQ_TYPEMASK) == EQ_CTRL,
("%s: eq type %d", __func__, eq->flags & EQ_TYPEMASK));
#else
KASSERT((eq->flags & EQ_TYPEMASK) == EQ_CTRL,
("%s: eq type %d", __func__, eq->flags & EQ_TYPEMASK));
#endif
if (__predict_true(wr != NULL))
STAILQ_INSERT_TAIL(&wrq->wr_list, wr, link);
can_reclaim = reclaimable(eq);
if (__predict_false(eq->flags & EQ_STALLED)) {
if (can_reclaim < tx_resume_threshold(eq))
return;
eq->flags &= ~EQ_STALLED;
eq->unstalled++;
}
eq->cidx += can_reclaim;
eq->avail += can_reclaim;
if (__predict_false(eq->cidx >= eq->cap))
eq->cidx -= eq->cap;
while ((wr = STAILQ_FIRST(&wrq->wr_list)) != NULL) {
int ndesc;
if (__predict_false(wr->wr_len < 0 ||
wr->wr_len > SGE_MAX_WR_LEN || (wr->wr_len & 0x7))) {
#ifdef INVARIANTS
panic("%s: work request with length %d", __func__,
wr->wr_len);
#endif
#ifdef KDB
kdb_backtrace();
#endif
log(LOG_ERR, "%s: %s work request with length %d",
device_get_nameunit(sc->dev), __func__, wr->wr_len);
STAILQ_REMOVE_HEAD(&wrq->wr_list, link);
free_wrqe(wr);
continue;
}
ndesc = howmany(wr->wr_len, EQ_ESIZE);
if (eq->avail < ndesc) {
wrq->no_desc++;
break;
}
dst = (void *)&eq->desc[eq->pidx];
copy_to_txd(eq, wrtod(wr), &dst, wr->wr_len);
eq->pidx += ndesc;
eq->avail -= ndesc;
if (__predict_false(eq->pidx >= eq->cap))
eq->pidx -= eq->cap;
eq->pending += ndesc;
if (eq->pending > 16)
ring_eq_db(sc, eq);
wrq->tx_wrs++;
STAILQ_REMOVE_HEAD(&wrq->wr_list, link);
free_wrqe(wr);
if (eq->avail < 8) {
can_reclaim = reclaimable(eq);
eq->cidx += can_reclaim;
eq->avail += can_reclaim;
if (__predict_false(eq->cidx >= eq->cap))
eq->cidx -= eq->cap;
}
}
if (eq->pending)
ring_eq_db(sc, eq);
if (wr != NULL) {
eq->flags |= EQ_STALLED;
if (callout_pending(&eq->tx_callout) == 0)
callout_reset(&eq->tx_callout, 1, t4_tx_callout, eq);
}
}
/* 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_core) + \
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 = txq->br;
struct mbuf *next;
int rc, coalescing, can_reclaim;
struct txpkts txpkts;
struct sgl sgl;
TXQ_LOCK_ASSERT_OWNED(txq);
KASSERT(m, ("%s: called with nothing to do.", __func__));
KASSERT((eq->flags & EQ_TYPEMASK) == EQ_ETH,
("%s: eq type %d", __func__, eq->flags & EQ_TYPEMASK));
prefetch(&eq->desc[eq->pidx]);
prefetch(&txq->sdesc[eq->pidx]);
txpkts.npkt = 0;/* indicates there's nothing in txpkts */
coalescing = 0;
can_reclaim = reclaimable(eq);
if (__predict_false(eq->flags & EQ_STALLED)) {
if (can_reclaim < tx_resume_threshold(eq)) {
txq->m = m;
return (0);
}
eq->flags &= ~EQ_STALLED;
eq->unstalled++;
}
if (__predict_false(eq->flags & EQ_DOOMED)) {
m_freem(m);
while ((m = buf_ring_dequeue_sc(txq->br)) != NULL)
m_freem(m);
return (ENETDOWN);
}
if (eq->avail < 8 && can_reclaim)
reclaim_tx_descs(txq, can_reclaim, 32);
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(txq, 0, 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:
if (eq->pending >= 64)
ring_eq_db(sc, eq);
can_reclaim = reclaimable(eq);
if (can_reclaim >= 32)
reclaim_tx_descs(txq, can_reclaim, 64);
}
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 (m && !(eq->flags & EQ_CRFLUSHED)) {
struct tx_sdesc *txsd = &txq->sdesc[eq->pidx];
/*
* If EQ_CRFLUSHED is not set then we know we have at least one
* available descriptor because any WR that reduces eq->avail to
* 0 also sets EQ_CRFLUSHED.
*/
KASSERT(eq->avail > 0, ("%s: no space for eqflush.", __func__));
txsd->desc_used = 1;
txsd->credits = 0;
write_eqflush_wr(eq);
}
txq->m = m;
if (eq->pending)
ring_eq_db(sc, eq);
reclaim_tx_descs(txq, 0, 128);
if (eq->flags & EQ_STALLED && callout_pending(&eq->tx_callout) == 0)
callout_reset(&eq->tx_callout, 1, t4_tx_callout, eq);
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, bufsize = mtu_to_bufsize(ifp->if_mtu);
for_each_rxq(pi, i, rxq) {
fl = &rxq->fl;
FL_LOCK(fl);
set_fl_tag_idx(fl, bufsize);
FL_UNLOCK(fl);
}
}
int
can_resume_tx(struct sge_eq *eq)
{
return (reclaimable(eq) >= tx_resume_threshold(eq));
}
static inline void
init_iq(struct sge_iq *iq, struct adapter *sc, int tmr_idx, int pktc_idx,
int qsize, int esize, 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);
iq->intr_pktc_idx = SGE_NCOUNTERS - 1;
if (pktc_idx >= 0) {
iq->intr_params |= F_QINTR_CNT_EN;
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 */
strlcpy(iq->lockname, name, sizeof(iq->lockname));
}
static inline void
init_fl(struct sge_fl *fl, int qsize, int bufsize, char *name)
{
fl->qsize = qsize;
strlcpy(fl->lockname, name, sizeof(fl->lockname));
set_fl_tag_idx(fl, bufsize);
}
static inline void
init_eq(struct sge_eq *eq, int eqtype, int qsize, uint8_t tx_chan,
uint16_t iqid, char *name)
{
KASSERT(tx_chan < NCHAN, ("%s: bad tx channel %d", __func__, tx_chan));
KASSERT(eqtype <= EQ_TYPEMASK, ("%s: bad qtype %d", __func__, eqtype));
eq->flags = eqtype & EQ_TYPEMASK;
eq->tx_chan = tx_chan;
eq->iqid = iqid;
eq->qsize = qsize;
strlcpy(eq->lockname, name, sizeof(eq->lockname));
TASK_INIT(&eq->tx_task, 0, t4_tx_task, eq);
callout_init(&eq->tx_callout, CALLOUT_MPSAFE);
}
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->flags & IQ_INTR) then
* the intr_idx specifies the vector, starting from 0. Otherwise it specifies
* the abs_id of the ingress queue to which its interrupts should be forwarded.
*/
static int
alloc_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl,
int intr_idx, int cong)
{
int rc, i, cntxt_id;
size_t len;
struct fw_iq_cmd c;
struct adapter *sc = iq->adapter;
__be32 v = 0;
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->flags & IQ_INTR) {
KASSERT(intr_idx < sc->intr_count,
("%s: invalid direct intr_idx %d", __func__, intr_idx));
} else
v |= F_FW_IQ_CMD_IQANDST;
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 (cong >= 0)
c.iqns_to_fl0congen = htobe32(F_FW_IQ_CMD_IQFLINTCONGEN);
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);
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;
fl->lowat = roundup(sc->sge.fl_starve_threshold, 8);
c.iqns_to_fl0congen |=
htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) |
F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO |
F_FW_IQ_CMD_FL0PADEN);
if (cong >= 0) {
c.iqns_to_fl0congen |=
htobe32(V_FW_IQ_CMD_FL0CNGCHMAP(cong) |
F_FW_IQ_CMD_FL0CONGCIF |
F_FW_IQ_CMD_FL0CONGEN);
}
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;
cntxt_id = iq->cntxt_id - sc->sge.iq_start;
if (cntxt_id >= sc->sge.niq) {
panic ("%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 = fl->cntxt_id - sc->sge.eq_start;
if (cntxt_id >= sc->sge.neq) {
panic("%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);
/* Enough to make sure the SGE doesn't think it's starved */
refill_fl(sc, fl, fl->lowat);
FL_UNLOCK(fl);
iq->flags |= IQ_HAS_FL;
}
/* Enable IQ interrupts */
atomic_store_rel_int(&iq->state, IQS_IDLE);
t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_SEINTARM(iq->intr_params) |
V_INGRESSQID(iq->cntxt_id));
return (0);
}
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_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);
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_fwq(struct adapter *sc)
{
int rc, intr_idx;
struct sge_iq *fwq = &sc->sge.fwq;
char name[16];
struct sysctl_oid *oid = device_get_sysctl_tree(sc->dev);
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
snprintf(name, sizeof(name), "%s fwq", device_get_nameunit(sc->dev));
init_iq(fwq, sc, 0, 0, FW_IQ_QSIZE, FW_IQ_ESIZE, name);
fwq->flags |= IQ_INTR; /* always */
intr_idx = sc->intr_count > 1 ? 1 : 0;
rc = alloc_iq_fl(sc->port[0], fwq, NULL, intr_idx, -1);
if (rc != 0) {
device_printf(sc->dev,
"failed to create firmware event queue: %d\n", rc);
return (rc);
}
oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "fwq", CTLFLAG_RD,
NULL, "firmware event queue");
children = SYSCTL_CHILDREN(oid);
SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "abs_id",
CTLTYPE_INT | CTLFLAG_RD, &fwq->abs_id, 0, sysctl_uint16, "I",
"absolute id of the queue");
SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "cntxt_id",
CTLTYPE_INT | CTLFLAG_RD, &fwq->cntxt_id, 0, sysctl_uint16, "I",
"SGE context id of the queue");
SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD, &fwq->cidx, 0, sysctl_uint16, "I",
"consumer index");
return (0);
}
static int
free_fwq(struct adapter *sc)
{
return free_iq_fl(NULL, &sc->sge.fwq, NULL);
}
static int
alloc_mgmtq(struct adapter *sc)
{
int rc;
struct sge_wrq *mgmtq = &sc->sge.mgmtq;
char name[16];
struct sysctl_oid *oid = device_get_sysctl_tree(sc->dev);
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "mgmtq", CTLFLAG_RD,
NULL, "management queue");
snprintf(name, sizeof(name), "%s mgmtq", device_get_nameunit(sc->dev));
init_eq(&mgmtq->eq, EQ_CTRL, CTRL_EQ_QSIZE, sc->port[0]->tx_chan,
sc->sge.fwq.cntxt_id, name);
rc = alloc_wrq(sc, NULL, mgmtq, oid);
if (rc != 0) {
device_printf(sc->dev,
"failed to create management queue: %d\n", rc);
return (rc);
}
return (0);
}
static int
free_mgmtq(struct adapter *sc)
{
return free_wrq(sc, &sc->sge.mgmtq);
}
static inline int
tnl_cong(struct port_info *pi)
{
if (cong_drop == -1)
return (-1);
else if (cong_drop == 1)
return (0);
else
return (1 << pi->tx_chan);
}
static int
alloc_rxq(struct port_info *pi, struct sge_rxq *rxq, int intr_idx, int idx,
struct sysctl_oid *oid)
{
int rc;
struct sysctl_oid_list *children;
char name[16];
rc = alloc_iq_fl(pi, &rxq->iq, &rxq->fl, intr_idx, tnl_cong(pi));
if (rc != 0)
return (rc);
FL_LOCK(&rxq->fl);
refill_fl(pi->adapter, &rxq->fl, rxq->fl.needed / 8);
FL_UNLOCK(&rxq->fl);
#if defined(INET) || defined(INET6)
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->iq.flags |= IQ_LRO_ENABLED;
#endif
rxq->ifp = pi->ifp;
children = SYSCTL_CHILDREN(oid);
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_PROC(&pi->ctx, children, OID_AUTO, "abs_id",
CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.abs_id, 0, sysctl_uint16, "I",
"absolute id of the queue");
SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id",
CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.cntxt_id, 0, sysctl_uint16, "I",
"SGE context id of the queue");
SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.cidx, 0, sysctl_uint16, "I",
"consumer index");
#if defined(INET) || defined(INET6)
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);
#endif
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");
children = SYSCTL_CHILDREN(oid);
oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "fl", CTLFLAG_RD,
NULL, "freelist");
children = SYSCTL_CHILDREN(oid);
SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id",
CTLTYPE_INT | CTLFLAG_RD, &rxq->fl.cntxt_id, 0, sysctl_uint16, "I",
"SGE context id of the queue");
SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cidx", CTLFLAG_RD,
&rxq->fl.cidx, 0, "consumer index");
SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "pidx", CTLFLAG_RD,
&rxq->fl.pidx, 0, "producer index");
return (rc);
}
static int
free_rxq(struct port_info *pi, struct sge_rxq *rxq)
{
int rc;
#if defined(INET) || defined(INET6)
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);
}
#ifdef TCP_OFFLOAD
static int
alloc_ofld_rxq(struct port_info *pi, struct sge_ofld_rxq *ofld_rxq,
int intr_idx, int idx, struct sysctl_oid *oid)
{
int rc;
struct sysctl_oid_list *children;
char name[16];
rc = alloc_iq_fl(pi, &ofld_rxq->iq, &ofld_rxq->fl, intr_idx,
1 << pi->tx_chan);
if (rc != 0)
return (rc);
children = SYSCTL_CHILDREN(oid);
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_PROC(&pi->ctx, children, OID_AUTO, "abs_id",
CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.abs_id, 0, sysctl_uint16,
"I", "absolute id of the queue");
SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id",
CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.cntxt_id, 0, sysctl_uint16,
"I", "SGE context id of the queue");
SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.cidx, 0, sysctl_uint16, "I",
"consumer index");
children = SYSCTL_CHILDREN(oid);
oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "fl", CTLFLAG_RD,
NULL, "freelist");
children = SYSCTL_CHILDREN(oid);
SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id",
CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->fl.cntxt_id, 0, sysctl_uint16,
"I", "SGE context id of the queue");
SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cidx", CTLFLAG_RD,
&ofld_rxq->fl.cidx, 0, "consumer index");
SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "pidx", CTLFLAG_RD,
&ofld_rxq->fl.pidx, 0, "producer index");
return (rc);
}
static int
free_ofld_rxq(struct port_info *pi, struct sge_ofld_rxq *ofld_rxq)
{
int rc;
rc = free_iq_fl(pi, &ofld_rxq->iq, &ofld_rxq->fl);
if (rc == 0)
bzero(ofld_rxq, sizeof(*ofld_rxq));
return (rc);
}
#endif
static int
ctrl_eq_alloc(struct adapter *sc, struct sge_eq *eq)
{
int rc, cntxt_id;
struct fw_eq_ctrl_cmd c;
bzero(&c, sizeof(c));
c.op_to_vfn = htobe32(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(sc->pf) |
V_FW_EQ_CTRL_CMD_VFN(0));
c.alloc_to_len16 = htobe32(F_FW_EQ_CTRL_CMD_ALLOC |
F_FW_EQ_CTRL_CMD_EQSTART | FW_LEN16(c));
c.cmpliqid_eqid = htonl(V_FW_EQ_CTRL_CMD_CMPLIQID(eq->iqid)); /* XXX */
c.physeqid_pkd = htobe32(0);
c.fetchszm_to_iqid =
htobe32(V_FW_EQ_CTRL_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) |
V_FW_EQ_CTRL_CMD_PCIECHN(eq->tx_chan) |
F_FW_EQ_CTRL_CMD_FETCHRO | V_FW_EQ_CTRL_CMD_IQID(eq->iqid));
c.dcaen_to_eqsize =
htobe32(V_FW_EQ_CTRL_CMD_FBMIN(X_FETCHBURSTMIN_64B) |
V_FW_EQ_CTRL_CMD_FBMAX(X_FETCHBURSTMAX_512B) |
V_FW_EQ_CTRL_CMD_CIDXFTHRESH(X_CIDXFLUSHTHRESH_32) |
V_FW_EQ_CTRL_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(sc->dev,
"failed to create control queue %d: %d\n", eq->tx_chan, rc);
return (rc);
}
eq->flags |= EQ_ALLOCATED;
eq->cntxt_id = G_FW_EQ_CTRL_CMD_EQID(be32toh(c.cmpliqid_eqid));
cntxt_id = eq->cntxt_id - sc->sge.eq_start;
if (cntxt_id >= sc->sge.neq)
panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__,
cntxt_id, sc->sge.neq - 1);
sc->sge.eqmap[cntxt_id] = eq;
return (rc);
}
static int
eth_eq_alloc(struct adapter *sc, struct port_info *pi, struct sge_eq *eq)
{
int rc, cntxt_id;
struct fw_eq_eth_cmd c;
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(eq->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO |
V_FW_EQ_ETH_CMD_IQID(eq->iqid));
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 Ethernet egress queue: %d\n", rc);
return (rc);
}
eq->flags |= EQ_ALLOCATED;
eq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd));
cntxt_id = eq->cntxt_id - sc->sge.eq_start;
if (cntxt_id >= sc->sge.neq)
panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__,
cntxt_id, sc->sge.neq - 1);
sc->sge.eqmap[cntxt_id] = eq;
return (rc);
}
#ifdef TCP_OFFLOAD
static int
ofld_eq_alloc(struct adapter *sc, struct port_info *pi, struct sge_eq *eq)
{
int rc, cntxt_id;
struct fw_eq_ofld_cmd c;
bzero(&c, sizeof(c));
c.op_to_vfn = htonl(V_FW_CMD_OP(FW_EQ_OFLD_CMD) | F_FW_CMD_REQUEST |
F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_OFLD_CMD_PFN(sc->pf) |
V_FW_EQ_OFLD_CMD_VFN(0));
c.alloc_to_len16 = htonl(F_FW_EQ_OFLD_CMD_ALLOC |
F_FW_EQ_OFLD_CMD_EQSTART | FW_LEN16(c));
c.fetchszm_to_iqid =
htonl(V_FW_EQ_OFLD_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) |
V_FW_EQ_OFLD_CMD_PCIECHN(eq->tx_chan) |
F_FW_EQ_OFLD_CMD_FETCHRO | V_FW_EQ_OFLD_CMD_IQID(eq->iqid));
c.dcaen_to_eqsize =
htobe32(V_FW_EQ_OFLD_CMD_FBMIN(X_FETCHBURSTMIN_64B) |
V_FW_EQ_OFLD_CMD_FBMAX(X_FETCHBURSTMAX_512B) |
V_FW_EQ_OFLD_CMD_CIDXFTHRESH(X_CIDXFLUSHTHRESH_32) |
V_FW_EQ_OFLD_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 for TCP offload: %d\n", rc);
return (rc);
}
eq->flags |= EQ_ALLOCATED;
eq->cntxt_id = G_FW_EQ_OFLD_CMD_EQID(be32toh(c.eqid_pkd));
cntxt_id = eq->cntxt_id - sc->sge.eq_start;
if (cntxt_id >= sc->sge.neq)
panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__,
cntxt_id, sc->sge.neq - 1);
sc->sge.eqmap[cntxt_id] = eq;
return (rc);
}
#endif
static int
alloc_eq(struct adapter *sc, struct port_info *pi, struct sge_eq *eq)
{
int rc;
size_t len;
mtx_init(&eq->eq_lock, eq->lockname, NULL, MTX_DEF);
len = eq->qsize * 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 / EQ_ESIZE;
eq->spg = (void *)&eq->desc[eq->cap];
eq->avail = eq->cap - 1; /* one less to avoid cidx = pidx */
eq->pidx = eq->cidx = 0;
switch (eq->flags & EQ_TYPEMASK) {
case EQ_CTRL:
rc = ctrl_eq_alloc(sc, eq);
break;
case EQ_ETH:
rc = eth_eq_alloc(sc, pi, eq);
break;
#ifdef TCP_OFFLOAD
case EQ_OFLD:
rc = ofld_eq_alloc(sc, pi, eq);
break;
#endif
default:
panic("%s: invalid eq type %d.", __func__,
eq->flags & EQ_TYPEMASK);
}
if (rc != 0) {
device_printf(sc->dev,
"failed to allocate egress queue(%d): %d",
eq->flags & EQ_TYPEMASK, rc);
}
eq->tx_callout.c_cpu = eq->cntxt_id % mp_ncpus;
return (rc);
}
static int
free_eq(struct adapter *sc, struct sge_eq *eq)
{
int rc;
if (eq->flags & EQ_ALLOCATED) {
switch (eq->flags & EQ_TYPEMASK) {
case EQ_CTRL:
rc = -t4_ctrl_eq_free(sc, sc->mbox, sc->pf, 0,
eq->cntxt_id);
break;
case EQ_ETH:
rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0,
eq->cntxt_id);
break;
#ifdef TCP_OFFLOAD
case EQ_OFLD:
rc = -t4_ofld_eq_free(sc, sc->mbox, sc->pf, 0,
eq->cntxt_id);
break;
#endif
default:
panic("%s: invalid eq type %d.", __func__,
eq->flags & EQ_TYPEMASK);
}
if (rc != 0) {
device_printf(sc->dev,
"failed to free egress queue (%d): %d\n",
eq->flags & EQ_TYPEMASK, rc);
return (rc);
}
eq->flags &= ~EQ_ALLOCATED;
}
free_ring(sc, eq->desc_tag, eq->desc_map, eq->ba, eq->desc);
if (mtx_initialized(&eq->eq_lock))
mtx_destroy(&eq->eq_lock);
bzero(eq, sizeof(*eq));
return (0);
}
static int
alloc_wrq(struct adapter *sc, struct port_info *pi, struct sge_wrq *wrq,
struct sysctl_oid *oid)
{
int rc;
struct sysctl_ctx_list *ctx = pi ? &pi->ctx : &sc->ctx;
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
rc = alloc_eq(sc, pi, &wrq->eq);
if (rc)
return (rc);
wrq->adapter = sc;
STAILQ_INIT(&wrq->wr_list);
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD,
&wrq->eq.cntxt_id, 0, "SGE context id of the queue");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD, &wrq->eq.cidx, 0, sysctl_uint16, "I",
"consumer index");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "pidx",
CTLTYPE_INT | CTLFLAG_RD, &wrq->eq.pidx, 0, sysctl_uint16, "I",
"producer index");
SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "tx_wrs", CTLFLAG_RD,
&wrq->tx_wrs, "# of work requests");
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "no_desc", CTLFLAG_RD,
&wrq->no_desc, 0,
"# of times queue ran out of hardware descriptors");
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "unstalled", CTLFLAG_RD,
&wrq->eq.unstalled, 0, "# of times queue recovered after stall");
return (rc);
}
static int
free_wrq(struct adapter *sc, struct sge_wrq *wrq)
{
int rc;
rc = free_eq(sc, &wrq->eq);
if (rc)
return (rc);
bzero(wrq, sizeof(*wrq));
return (0);
}
static int
alloc_txq(struct port_info *pi, struct sge_txq *txq, int idx,
struct sysctl_oid *oid)
{
int rc;
struct adapter *sc = pi->adapter;
struct sge_eq *eq = &txq->eq;
char name[16];
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
rc = alloc_eq(sc, pi, eq);
if (rc)
return (rc);
txq->ifp = pi->ifp;
txq->sdesc = malloc(eq->cap * sizeof(struct tx_sdesc), M_CXGBE,
M_ZERO | M_WAITOK);
txq->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, &txq->tx_tag);
if (rc != 0) {
device_printf(sc->dev,
"failed to create tx DMA tag: %d\n", rc);
return (rc);
}
/*
* 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.
*/
rc = t4_alloc_tx_maps(&txq->txmaps, txq->tx_tag, eq->qsize * 10 / 8,
M_WAITOK);
if (rc != 0) {
device_printf(sc->dev, "failed to setup tx DMA maps: %d\n", rc);
return (rc);
}
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_UINT(&pi->ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD,
&eq->cntxt_id, 0, "SGE context id of the queue");
SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD, &eq->cidx, 0, sysctl_uint16, "I",
"consumer index");
SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "pidx",
CTLTYPE_INT | CTLFLAG_RD, &eq->pidx, 0, sysctl_uint16, "I",
"producer index");
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 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,
&eq->egr_update, 0, "egress update notifications from the SGE");
SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "unstalled", CTLFLAG_RD,
&eq->unstalled, 0, "# of times txq recovered after stall");
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;
rc = free_eq(sc, eq);
if (rc)
return (rc);
free(txq->sdesc, M_CXGBE);
if (txq->txmaps.maps)
t4_free_tx_maps(&txq->txmaps, txq->tx_tag);
buf_ring_free(txq->br, M_CXGBE);
if (txq->tx_tag)
bus_dma_tag_destroy(txq->tx_tag);
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;
}
}
#define FL_HW_IDX(x) ((x) >> 3)
static inline void
ring_fl_db(struct adapter *sc, struct sge_fl *fl)
{
int ndesc = fl->pending / 8;
if (FL_HW_IDX(fl->pidx) == FL_HW_IDX(fl->cidx))
ndesc--; /* hold back one credit */
if (ndesc <= 0)
return; /* nothing to do */
wmb();
t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), F_DBPRIO |
V_QID(fl->cntxt_id) | V_PIDX(ndesc));
fl->pending -= ndesc * 8;
}
/*
* Fill up the freelist by upto nbufs and maybe ring its doorbell.
*
* Returns non-zero to indicate that it should be added to the list of starving
* freelists.
*/
static int
refill_fl(struct adapter *sc, 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 > 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:
/* sd->m is never recycled, should always be NULL */
KASSERT(sd->m == NULL, ("%s: stray mbuf", __func__));
sd->m = m_gethdr(M_NOWAIT, MT_NOINIT);
if (sd->m == NULL)
break;
fl->pending++;
fl->needed--;
sd++;
if (++fl->pidx == fl->cap) {
fl->pidx = 0;
sd = fl->sdesc;
d = fl->desc;
}
}
if (fl->pending >= 8)
ring_fl_db(sc, fl);
return (FL_RUNNING_LOW(fl) && !(fl->flags & FL_STARVING));
}
/*
* Attempt to refill all starving freelists.
*/
static void
refill_sfl(void *arg)
{
struct adapter *sc = arg;
struct sge_fl *fl, *fl_temp;
mtx_lock(&sc->sfl_lock);
TAILQ_FOREACH_SAFE(fl, &sc->sfl, link, fl_temp) {
FL_LOCK(fl);
refill_fl(sc, fl, 64);
if (FL_NOT_RUNNING_LOW(fl) || fl->flags & FL_DOOMED) {
TAILQ_REMOVE(&sc->sfl, fl, link);
fl->flags &= ~FL_STARVING;
}
FL_UNLOCK(fl);
}
if (!TAILQ_EMPTY(&sc->sfl))
callout_schedule(&sc->sfl_callout, hz / 5);
mtx_unlock(&sc->sfl_lock);
}
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;
}
return (0);
failed:
while (--i >= 0) {
sd--;
bus_dmamap_destroy(tag, sd->map);
if (sd->m) {
m_init(sd->m, NULL, 0, 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, NULL, 0, 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;
}
int
t4_alloc_tx_maps(struct tx_maps *txmaps, bus_dma_tag_t tx_tag, int count,
int flags)
{
struct tx_map *txm;
int i, rc;
txmaps->map_total = txmaps->map_avail = count;
txmaps->map_cidx = txmaps->map_pidx = 0;
txmaps->maps = malloc(count * sizeof(struct tx_map), M_CXGBE,
M_ZERO | flags);
txm = txmaps->maps;
for (i = 0; i < count; i++, txm++) {
rc = bus_dmamap_create(tx_tag, 0, &txm->map);
if (rc != 0)
goto failed;
}
return (0);
failed:
while (--i >= 0) {
txm--;
bus_dmamap_destroy(tx_tag, txm->map);
}
KASSERT(txm == txmaps->maps, ("%s: EDOOFUS", __func__));
free(txmaps->maps, M_CXGBE);
txmaps->maps = NULL;
return (rc);
}
void
t4_free_tx_maps(struct tx_maps *txmaps, bus_dma_tag_t tx_tag)
{
struct tx_map *txm;
int i;
txm = txmaps->maps;
for (i = 0; i < txmaps->map_total; i++, txm++) {
if (txm->m) {
bus_dmamap_unload(tx_tag, txm->map);
m_freem(txm->m);
txm->m = NULL;
}
bus_dmamap_destroy(tx_tag, txm->map);
}
free(txmaps->maps, M_CXGBE);
txmaps->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 * 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 tx_maps *txmaps;
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 */
txmaps = &txq->txmaps;
if (txmaps->map_avail == 0) {
txq->no_dmamap++;
return (ENOMEM);
}
txm = &txmaps->maps[txmaps->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(txq->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;
txmaps->map_avail--;
if (++txmaps->map_pidx == txmaps->map_total)
txmaps->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 tx_maps *txmaps;
struct tx_map *txm;
TXQ_LOCK_ASSERT_OWNED(txq);
if (sgl->nsegs == 0)
return (0); /* didn't use any map */
txmaps = &txq->txmaps;
/* 1 pkt uses exactly 1 map, back it out */
txmaps->map_avail++;
if (txmaps->map_pidx > 0)
txmaps->map_pidx--;
else
txmaps->map_pidx = txmaps->map_total - 1;
txm = &txmaps->maps[txmaps->map_pidx];
bus_dmamap_unload(txq->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, pktlen;
struct tx_sdesc *txsd;
caddr_t dst;
TXQ_LOCK_ASSERT_OWNED(txq);
pktlen = m->m_pkthdr.len;
/*
* 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_core);
} else
nflits = TXPKT_WR_HDR;
if (sgl->nsegs > 0)
nflits += sgl->nflits;
else {
nflits += howmany(pktlen, 8);
ctrl += pktlen;
}
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_ETH_TX_PKT_WR_IMMDLEN(ctrl));
ctrl = V_FW_WR_LEN16(howmany(nflits, 2));
if (eq->avail == ndesc) {
if (!(eq->flags & EQ_CRFLUSHED)) {
ctrl |= F_FW_WR_EQUEQ | F_FW_WR_EQUIQ;
eq->flags |= EQ_CRFLUSHED;
}
eq->flags |= EQ_STALLED;
}
wr->equiq_to_len16 = htobe32(ctrl);
wr->r3 = 0;
if (m->m_pkthdr.tso_segsz) {
struct cpl_tx_pkt_lso_core *lso = (void *)(wr + 1);
struct ether_header *eh;
void *l3hdr;
#if defined(INET) || defined(INET6)
struct tcphdr *tcp;
#endif
uint16_t eh_type;
ctrl = V_LSO_OPCODE(CPL_TX_PKT_LSO) | F_LSO_FIRST_SLICE |
F_LSO_LAST_SLICE;
eh = mtod(m, struct ether_header *);
eh_type = ntohs(eh->ether_type);
if (eh_type == ETHERTYPE_VLAN) {
struct ether_vlan_header *evh = (void *)eh;
ctrl |= V_LSO_ETHHDR_LEN(1);
l3hdr = evh + 1;
eh_type = ntohs(evh->evl_proto);
} else
l3hdr = eh + 1;
switch (eh_type) {
#ifdef INET6
case ETHERTYPE_IPV6:
{
struct ip6_hdr *ip6 = l3hdr;
/*
* XXX-BZ For now we do not pretend to support
* IPv6 extension headers.
*/
KASSERT(ip6->ip6_nxt == IPPROTO_TCP, ("%s: CSUM_TSO "
"with ip6_nxt != TCP: %u", __func__, ip6->ip6_nxt));
tcp = (struct tcphdr *)(ip6 + 1);
ctrl |= F_LSO_IPV6;
ctrl |= V_LSO_IPHDR_LEN(sizeof(*ip6) >> 2) |
V_LSO_TCPHDR_LEN(tcp->th_off);
break;
}
#endif
#ifdef INET
case ETHERTYPE_IP:
{
struct ip *ip = l3hdr;
tcp = (void *)((uintptr_t)ip + ip->ip_hl * 4);
ctrl |= V_LSO_IPHDR_LEN(ip->ip_hl) |
V_LSO_TCPHDR_LEN(tcp->th_off);
break;
}
#endif
default:
panic("%s: CSUM_TSO but no supported IP version "
"(0x%04x)", __func__, eh_type);
}
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(pktlen);
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 | CSUM_UDP_IPV6 |
CSUM_TCP_IPV6)))
ctrl1 |= F_TXPKT_L4CSUM_DIS;
if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP |
CSUM_UDP_IPV6 | CSUM_TCP_IPV6))
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(pktlen);
cpl->ctrl1 = htobe64(ctrl1);
/* Software descriptor */
txsd = &txq->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->credits = 1;
txq->sgl_wrs++;
write_sgl_to_txd(eq, sgl, &dst);
} else {
txsd->credits = 0;
txq->imm_wrs++;
for (; m; m = m->m_next) {
copy_to_txd(eq, mtod(m, caddr_t), &dst, m->m_len);
#ifdef INVARIANTS
pktlen -= m->m_len;
#endif
}
#ifdef INVARIANTS
KASSERT(pktlen == 0, ("%s: %d bytes left.", __func__, pktlen));
#endif
}
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);
KASSERT(sgl->nsegs, ("%s: can't coalesce imm data", __func__));
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 = &txq->sdesc[eq->pidx];
txsd->credits++;
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 = &txq->sdesc[eq->pidx];
txsd->credits = 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_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR));
ctrl = V_FW_WR_LEN16(howmany(txpkts->nflits, 2));
if (eq->avail == ndesc) {
if (!(eq->flags & EQ_CRFLUSHED)) {
ctrl |= F_FW_WR_EQUEQ | F_FW_WR_EQUIQ;
eq->flags |= EQ_CRFLUSHED;
}
eq->flags |= EQ_STALLED;
}
wr->equiq_to_len16 = htobe32(ctrl);
wr->plen = htobe16(txpkts->plen);
wr->npkt = txpkts->npkt;
wr->r3 = wr->type = 0;
/* Everything else already written */
txsd = &txq->sdesc[eq->pidx];
txsd->desc_used = ndesc;
KASSERT(eq->avail >= ndesc, ("%s: out of 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) |
V_ULP_TXPKT_FID(eq->iqid));
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 (__predict_true((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_eq_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 inline int
reclaimable(struct sge_eq *eq)
{
unsigned int cidx;
cidx = eq->spg->cidx; /* stable snapshot */
cidx = be16toh(cidx);
if (cidx >= eq->cidx)
return (cidx - eq->cidx);
else
return (cidx + eq->cap - eq->cidx);
}
/*
* There are "can_reclaim" tx descriptors ready to be reclaimed. Reclaim as
* many as possible but stop when there are around "n" mbufs to free.
*
* The actual number reclaimed is provided as the return value.
*/
static int
reclaim_tx_descs(struct sge_txq *txq, int can_reclaim, int n)
{
struct tx_sdesc *txsd;
struct tx_maps *txmaps;
struct tx_map *txm;
unsigned int reclaimed, maps;
struct sge_eq *eq = &txq->eq;
TXQ_LOCK_ASSERT_OWNED(txq);
if (can_reclaim == 0)
can_reclaim = reclaimable(eq);
maps = reclaimed = 0;
while (can_reclaim && maps < n) {
int ndesc;
txsd = &txq->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->credits;
reclaimed += ndesc;
can_reclaim -= ndesc;
eq->cidx += ndesc;
if (__predict_false(eq->cidx >= eq->cap))
eq->cidx -= eq->cap;
}
txmaps = &txq->txmaps;
txm = &txmaps->maps[txmaps->map_cidx];
if (maps)
prefetch(txm->m);
eq->avail += reclaimed;
KASSERT(eq->avail < eq->cap, /* avail tops out at (cap - 1) */
("%s: too many descriptors available", __func__));
txmaps->map_avail += maps;
KASSERT(txmaps->map_avail <= txmaps->map_total,
("%s: too many maps available", __func__));
while (maps--) {
struct tx_map *next;
next = txm + 1;
if (__predict_false(txmaps->map_cidx + 1 == txmaps->map_total))
next = txmaps->maps;
prefetch(next->m);
bus_dmamap_unload(txq->tx_tag, txm->map);
m_freem(txm->m);
txm->m = NULL;
txm = next;
if (__predict_false(++txmaps->map_cidx == txmaps->map_total))
txmaps->map_cidx = 0;
}
return (reclaimed);
}
static void
write_eqflush_wr(struct sge_eq *eq)
{
struct fw_eq_flush_wr *wr;
EQ_LOCK_ASSERT_OWNED(eq);
KASSERT(eq->avail > 0, ("%s: no descriptors left.", __func__));
KASSERT(!(eq->flags & EQ_CRFLUSHED), ("%s: flushed already", __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);
eq->flags |= (EQ_CRFLUSHED | EQ_STALLED);
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 void
set_fl_tag_idx(struct sge_fl *fl, int bufsize)
{
int i;
for (i = 0; i < FL_BUF_SIZES - 1; i++) {
if (FL_BUF_SIZE(i) >= bufsize)
break;
}
fl->tag_idx = i;
}
static void
add_fl_to_sfl(struct adapter *sc, struct sge_fl *fl)
{
mtx_lock(&sc->sfl_lock);
FL_LOCK(fl);
if ((fl->flags & FL_DOOMED) == 0) {
fl->flags |= FL_STARVING;
TAILQ_INSERT_TAIL(&sc->sfl, fl, link);
callout_reset(&sc->sfl_callout, hz / 5, refill_sfl, sc);
}
FL_UNLOCK(fl);
mtx_unlock(&sc->sfl_lock);
}
static int
handle_sge_egr_update(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
const struct cpl_sge_egr_update *cpl = (const void *)(rss + 1);
unsigned int qid = G_EGR_QID(ntohl(cpl->opcode_qid));
struct adapter *sc = iq->adapter;
struct sge *s = &sc->sge;
struct sge_eq *eq;
KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__,
rss->opcode));
eq = s->eqmap[qid - s->eq_start];
EQ_LOCK(eq);
KASSERT(eq->flags & EQ_CRFLUSHED,
("%s: unsolicited egress update", __func__));
eq->flags &= ~EQ_CRFLUSHED;
eq->egr_update++;
if (__predict_false(eq->flags & EQ_DOOMED))
wakeup_one(eq);
else if (eq->flags & EQ_STALLED && can_resume_tx(eq))
taskqueue_enqueue(sc->tq[eq->tx_chan], &eq->tx_task);
EQ_UNLOCK(eq);
return (0);
}
static int
handle_fw_msg(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_fw6_msg *cpl = (const void *)(rss + 1);
KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__,
rss->opcode));
return (sc->fw_msg_handler[cpl->type](sc, &cpl->data[0]));
}
static int
sysctl_uint16(SYSCTL_HANDLER_ARGS)
{
uint16_t *id = arg1;
int i = *id;
return sysctl_handle_int(oidp, &i, 0, req);
}
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